109results about How to "Increase furnace temperature" patented technology

The invention relates to a model for optimally controlling a heating system of a large walking beam type heating furnace plate blank, which belongs to the technical field of industrial heating. A billet steel heating system optimizing model is adopted to optimize the order of entering the furnace for the billet steel of different steel type; the billet steel heating time and the temperature of each segment of the heating furnace are optimized; and the temperature change of the billet steel in the heating process is predicted. The model consists of a temperature control module of a single steel type of billet steel, and a heating optimal control module of multiple steel types of billet steel, wherein one module aims at simulating the heating process of a signal block of billet steel, and the other module aims at simulating the heating process under the condition of 10 blocks of billet steel entering the furnace, i.e. mixed loading furnace entering condition. The model is adopted to optimize the heating system of the billet steel so as to avoid the overhigh heating temperature of the billet steel and reduce the oxidation burning loss of the billet steel; reasonable heating time can be adopted to reduce unnecessary fuel waste and fuel consumption; and the model is conducive to scientifically and reasonably regulate the operation parameters of the heating furnace and meet the requirements on billet steel heating quality.

The invention discloses a burning quality analysis and control system used for industrial stoves such as heating furnace, hot blast stove, boiler. Sampling pipe disposed at tail of the stove or in flue transfers sampled flue gas to purifying sampling chamber after the flue gas has been cooled, and oxygen sensor detects oxygen content value of the flue gas. As the oxygen content value of the flue gas in stove exceeds the predetermined value, i.e. excessive air distribution, the oxygen transmits the signal to a controller for comparing, operating or processing, and then transmits the processed signal to speed governor to reduce the rotation speed of blower group, i.e. air reduction, until air amount is appropriate; contrarily, if the oxygen content value of the flue gas in stove, detected by the oxygen sensor, is lower than the predetermined value, i.e. lacking air distribution, the speed governor will increase the rotation speed of the blower group, i.e. air increase, until air amount is appropriate, thereby, keeping the air consumption system of the stove in region of 1.0 to 1.1. The analysis and control system can not only improve burning quality of the industrial stove thereby providing economic benefit for user, but can also greatly reduce the emission of nitrogen oxides or carbon monoxide, therefore, has great popularization value.

The invention discloses an efficient reburning denitrification device which comprises a decomposing furnace. The bottom of the decomposing furnace is provided with a secondary air inlet and is connected with a rotary cement kiln. The decomposing furnace comprises a main low-nitrogen burner and a reburning burner on the lower portion from bottom to top, and a raw material inlet is arranged at the position of the main low-nitrogen burner. Coal powder in a coal powder bunker enters the decomposing furnace from the main low-nitrogen burner and the reburning burner. A tertiary air inlet is arranged below the raw material inlet and connected with a cooler of the rotary cement kiln. The decomposing furnace comprises an overfire air inlet and an SNCR (selective non-catalytic reduction) spray gun on the upper portion from bottom to top. The overfire air inlet is connected with the tertiary air inlet and the cooler of the rotary cement kiln. The SNCR spray gun is connected with a centrifugal pump and an ammonia water storage tank device. A smoke outlet is arranged at the upper section of the decomposing furnace and connected with a cyclone preheater, an electric dust collector and a chimney. The invention further provides a technical reburning denitrification method by the efficient reburning denitrification device. By the efficient reburning denitrification device and the technical reburning denitrification method, NOx removal efficiency can be improved, sprayed ammonia water is reduced, and denitrification cost of cement enterprises is lowered.

The invention discloses a production method and a production system for vanadium pentoxide. The production method comprises the following steps of breaking industrial ammonium vanadate filter cakes and then continuously adding the industrial ammonium vanadate filter cakes into drying equipment and drying by using high-temperature gas; enabling the dried ammonium vanadate to enter calcinating equipment for deaminizing oxidation to obtain mixer of powder vanadium pentoxide or vanadium oxide; and enabling the mixer of the powder vanadium pentoxide or vanadium oxide to enter melting equipment for melting and casting pieces to obtain flaky vanadium pentoxide. According to the production method, drying for dehydration, calcinating for deaminizing and melting and piece casing processes of ammonium polyvanadate or ammonium metavanadate are respectively operated in three sets of equipment; the temperature, the furnace charge stay time and oxidation supply atmosphere (hot air) can be effectively controlled according to different function phases of drying, deaminizing and oxidizing and optimal conditions, and thus each function phase is operated under the optimal condition and further stability, high quality and high yield are achieved. The production method can be used for producing flaky and powder vanadium pentoxide and the yield of metal vanadium is respectively greater than 99 percent.

The invention relates to a technology for smelting ferronickel from lateritic nickel ore by an electric furnace. The technology comprises the steps as follows: (1) raw material is pretreated: the lateritic nickel is counted as one ton, coal powder with the weight of 8-12 percent of the weight of the lateritic nickel or coke powder with the weight of 6-10 percent of the weight of the lateritic nickel is added into the lateritic nickel to be mixed uniformly and returned to a rotary kiln to be sintered at the temperature of 600 DEG C to 1000 DEG C for 3 to 6 hours, wherein, the pre-reduction of 20-30 percent of NiO is achieved; (2) the raw material is put into a submerged arc furnace to be smelted: an electric furnace magnesia and carbon mixture furnace lining is arranged; adjustable electric furnace voltage is set with the high voltage of 280-300V and the low voltage of 200-220V, and that is the high voltage starts arc, and after 30 minutes, the electric furnace is changed to low voltage for smelting and calcining an electrode; the charge of smelting furnace charging material consists of one ton of sintered nickel and 90-120kg of fusing agent lime; coke or coal is added as a reducer; the raw material and the auxiliary material are put into the electric furnace to be smelted; and (3) crude ferronickel is refined: liquid molten iron is put into a finery, and a refining agent is added for refining by oxygen blast. A product contains more than 13 percent of nickel, thereby satisfying the requirement of producing high-quality steel material product; and the recovery rate of nickel element is more than 95 percent. The technology has simple technology, saves energy and has high efficiency.

The invention discloses a high pure andalusite brick for an air heating furnace with high blast temperature and long service life, and a preparation method thereof. The high pure andalusite brick is prepared by the following steps: andalusite, sillimanite sand, activated alumina powder and kaolin are taken as raw materials, andalusite powder, the activated alumina powder and kaolin powder which have the raw material particle size of between 0.088 and 0 mm are premixed into powder first, then the remaining particle materials, sulphite liquor and the prepared powder are mixed evenly to produce pug, the produced pug is pressed into a green brick, and the green brick is transferred into a high-temperature tunnel kiln for calcination to obtain a product. As a refractory material of a large-scale air heating furnace, the product has low creep rate and good thermal shock stability during use, and can apparently improve the blast temperature and the service life of the air heating furnace, thereby saving a large amount of maintenance cost and energy-saving cost for iron and steel users, and obtaining remarkable social and economical benefits.

The invention discloses an integrated low-carbon micro-discharge energy-saving and emission-reduction boiler system. The system comprises a boiler body (1), a steam drum (2), a heat exchanger (3), a preheater (4), an economizer (5), a superheater (6), a steam turbine (7), a generator (8), a secondary smoke combustion device (9), a desulfuration and dust collect unit (10), an air blower (11) and a smoke exhauster (13), wherein the steam drum (2) and the heat exchanger (3) constitute a hot-water heating circulation loop, the economizer (5) is connected with the steam drum (2), and the air blower (11) feeds air to the preheater (4); the steam drum (2) is connected with the superheater (6), and then connected with the steam turbine (7) by a superheated steam pipe (22); the steam turbine (7) is connected with a low-pressure steam pipe (23), and the generator (8) is linked with the steam turbine (7); and the outlet of a gas duct of the boiler body (1) is connected with a smoke pipe (25), and the smoke exhauster (13) is arranged on the smoke pipe (25), and sequentially feeds smoke into the secondary smoke combustion device (9) and the desulfuration and dust collect unit (10) so as to process and discharge the smoke.

The invention discloses a household garbage recycling harmless treatment system. The system comprises a garbage sorting mechanism, a mechanism for anaerobic-aerobic preparation of a bio-organic fertilizer from garbage, a garbage burning mechanism and a flue gas purification mechanism. The garbage sorting mechanism, the mechanism for anaerobic-aerobic preparation of the bio-organic fertilizer from the garbage, the garbage burning mechanism and the flue gas purification mechanism are connected into one part through a conveyor belt. The garbage sorting mechanism is separately connected to the mechanism for anaerobic-aerobic preparation of the bio-organic fertilizer from the garbage and to the garbage burning mechanism. The flue gas purification mechanism is connected to the garbage burning mechanism. The system is connected into one part through the conveyor belt and is automatically operated, labor-saving and time-saving. The system can treat the household garbage systematically and cleanly without residue. The system can recycle most of the household garbage, wherein organic maters are prepared into the bio-organic fertilizer and plastic film are recycled and regenerated. Hot wind and marsh gas are adopted to help burning of an incinerator, the furnace temperature is high, the burning is complete, and dioxin can be cracked. The flue gas purification mechanism is provided with a flue gas quencher to prevent the generation of the dioxin. The treatment system is environmental friendly and free of secondary pollution, and is particularly suitable to be used in villages, towns, and middle-sized and small cities.

The invention relates to a biomass gasification concentrating safety and early-warning gas supply system, mainly comprising a feeding rack, a wind-controlled gasification furnace, grouped water spray towers, a horizontal spray filtering purification can, a double-tank tar retriever, a surplus heat utilization device and an underground wet gas reservoir. The invention mainly has the characteristics that 1) the pyrolysis, oxidation and reducing reaction in the gasification furnace can be actively controlled by wind to improve the gasification efficiency; 2) the tar in the system can be recycled, and the energy utilization rate is improved; 3) the gas has a long technical process, high quality and high purity; 4) the components of the gasification machine are easy to maintain independently; 5) the early-warning function has four levels, i.e. blue, yellow, orange and red, and the alarming mechanism can be used to control the system safety automatically. Therefore, the invention is capable of supplying biomass gas in a high efficient and safe manner.

The CS2 reactor furnace includes inner furnace body of refractory material, outer furnace body of refractory material, and heating chamber between the inner surface body and the outer furnace body. In the peripheral of the inner surface body, there are sulfur gasifying furnace and carbon material preheating furnace, and the sulfur gasifying, furnace is connected via sulfur vapor duct to the bottom of the inner furnace body. The CS2 reactor furnace of the present invention has no sulfurizing and oxidizing corrosion of inner furnace body and thus long service life. The material preheating speeds the reaction and raise the product yield. Heating the coal-burning gas furnace via the main fire channel communicated with the furnace body can save fuel and stabilize furnace temperature.

The invention deals with the method of using the deposed steel to produce directly the iron and the steel by the converter, the steps are showed below: 1. a) in the 2# converter, firstly, the mine block without the mist or the black lead coal block, the manganese ore and the limestone are added; secondly, the deposed steel loading is added, the air and the oxygen is added from the roof, the oxygen and the blind coal powder is added from the side of the stove and the bottom of the stove, the process of blowing and smelting is keep 20-30 minutes, the temperature is promoted to the 1450-1500 to produce the molten iron, the molten iron is added in the ladle, the percentage of the outcome quantity of the molten iron accounts for the 45-55 compared with the overall molten iron; b) the blind coal block or the pot lead block, the manganese mine and the limestone are added in the converter, then the deposed steel is added, the step one is executed repeatedly. 2. the molten iron in the ladle produced by the step one a) is added with the lime powder and the ferric oxide powder and the air or the oxygen or the nitrogen, 3, the molten iron produced by the step two is loaded in the 1# converter, the deposited steel and the lime block are added, the oxygen is blow from the roof, the process keep 12-15 minutes, the temperature is promoted to the 1650-1680 to produce the molten steel, 4, the casting ingot or the casting embryo. The invention has merits such as the low invest and the low consuming energy.

The invention discloses a power generation technique based on pyrolyzation and gasification of refuse derived fuel (RDF) prepared from household refuse and incineration of fuel gas. The power generation method comprises the steps that the household refuse is sorted, pulverized and dried and then is made into the solid RDF; pyrolyzation and gasification are conducted on the solid RDF, so that combustible gas is generated; the combustible gas is incinerated; steam is prepared from hot air obtained through incineration through heat exchange; and the steam is introduced into a steam power generator for power generation. According to the power generation technique based on pyrolyzation and gasification of the RDF prepared from the household refuse and incineration of the fuel gas, the household refuse is made into the combustible solid RDF, and thus formation of dioxin can be effectively restrained; after prepared bars are formed, the moisture content is decreased, the heat value is increased, and the power generation efficiency is improved; the dioxin is completely decomposed by conducting heat-storage incineration of the generated combustible gas through secondary gas at the temperature over 850 DEG C, and waste heat is used for drying the refuse; smoke emission hardly exists under the adsorption action of the pulverized refuse.

The invention belongs to the technical field of chemical coal made gas, and particularly relates to a coal gas production method and device using high-temperature rich oxygen and high temperature steam as a gasification agent. The coal gas production method and device adopt oxygen-enriched air with the oxygen concentration of 25 ~ 30% and with the oxygen temperature of 120 ~ 220 DEG C and the high temperature steam with the temperature of 120 ~ 220 DEG C as the gasification agent for coal gas production; and accordingly, an oxygen-enriched air source and related a heat exchanger, a control valve and pipelines are additionally arranged in an original coal gas production device. The coal gas production method and device well overcome the technical defects of coal gas production by use of a traditional atmospheric-pressure fixed bed gas producer, increase the coal gas producer yield and the coal gas calorific value, reduce the carbon content of ash, and reduce sensible heat loss, and the coal gas unit consumption is reduced by 10 ~ 30%.

The invention is a three-gas mixed burner. And blast-furnace gas circuit, combustion supporting air circuit and coke-oven gas circuit, which are formed by isolation of furnace walls and inner walls, are arranged at the bottom of the burner, flow guide columns are in the center of the circuit; furnace walls and inner isolating walls compose blast-furnace gas channel, combustion supporting air channel and coke-oven gas channel, which are radiation in shape and staggered mutually, the blast-furnace gas channel communicates with the blast-furnace gas circuit, the combustion supporting air channel communicates with the combustion support air circuit, the coke-oven gas channel communicates with the coke-oven gas circuit, three channels at the upper part of the furnace wall are provided with annular channels communicating with them, and the annular channels are equipped with communicating sector jet holes. The advantages are full combustion, high thermal value, low CO content, low cost.

The invention relates to a graphitization furnace and a manufacturing method thereof. The graphitization furnace comprises conductive walls, furnace core plates, carbon blocks and thermal insulation material layers; when the graphitization furnace is manufactured, a furnace core area is calculated firstly; the two conductive walls which are opposite left and right are constructed according to the furnace core area obtained through calculation, and the peripheries of the conductive walls are covered with the carbon blocks; the furnace core plates are arranged on two sides of the conductive walls in a surrounding manner, and width of the defined furnace core is the same as that of the conductive walls; finally, the thermal insulation material layers are additionally arranged on outer sides of the carbon blocks and the furnace core plates. Resistance value of the carbon blocks is larger, so that current can be effectively prevented from being diffused outwards; besides, the width of the furnace core is the same as that of the conductive walls, the thermal insulation material layers are made of a thermal insulation material with larger resistance value, therefore, current can be further prevented from being diffused, the furnace temperature is increased, and the phenomenon of arc strike oxidation of a crucible in the furnace is eliminated.

The carbon material stuffing with low adhering index is prduced with carbon containing material of adhering index less than 40 or expansion coefficient smaller than 3 and granularity smaller than 100 mm, and through dry distillation at 850-1300 deg.c. The carbon material stuffing with low adhering index has low strength and low volatile content. The coke briquette with the stuffing as main material has high strength, high density of 1.2-1.6 g / cu cm and low volatile content of 0.5-2 %, and is balls of diameter greater than 30 mm. The coke briquette is suitable for use in large blast furnace. The present invention makes it possible to coke with anthracite and lean coal.

The invention discloses an antimony bottom blowing blast volatilization smelting technology and a antimony bottom blowing blast metallurgical furnace. The antimony bottom blowing blast volatilization smelting technology the steps as follows: supplying heat by coking coal or lump coal, supplying air and oxygen into a hearth by a fan, adding coal and antimony ore burden into the hearth from the top or the upper side surface of the furnace body, allowing flue gas to enter a condensation dust-collection system from the upper side surface or the top of the furnace body, and enabling the air of the fan to blow into the hearth from bottom to top after the air is distributed at the bottom of the hearth. The antimony bottom blowing blast metallurgical furnace comprises the furnace body, a forehearth and a tuyere. The furnace body comprises the hearth, a water jacket and a slag through way, wherein one end of the slag through way is connected with the bottom of the hearth, while the other end of the slag through way is connected with the forehearth; the tuyere is arranged at the bottom of the hearth; and the fan supplies air upwards from the bottom of the hearth through the tuyere. The utilization rate of air is improved and the daily treatment capacity is increased obviously; the uniform distribution of air flows plays a very obvious effect in improving the burning effect of fuel; the fuel burns sufficiently; the furnace temperature rises; the smelting process is strengthened; the daily treatment capacity is improved; antimony is voltilized and oxidized sufficiently; the content of antimony in slag is lowered obviously; and the recovery rate of metal is enhanced remarkably.

The invention discloses a high-alumina high-temperature refractory castable for a power station boiler, which is prepared from the following components in parts by weight: 60-80 parts of high-alumina aggregate, 5-12 parts of special-grade kaolin, 5-12 parts of binder, 2-8 parts of silicon micro-powder, 2-10 parts of alumina micro-powder and 1-5 parts of water, wherein in the 60-80 parts of high-aluminum aggregate, coarse aggregate accounts for 30-40%, medium aggregate accounts for 35-45%, and fine aggregate accounts for 20-30%; the binder is prepared from the following components in parts by weight: 20-40 parts of magnesium silicate and 80-60 parts of phosphate. The high-alumina high-temperature refractory castable disclosed by the invention has the beneficial effects that the boiler box temperature can be increased by 60-250 DEG C, the thermal efficiency can be improved to 8%, and the service life of the boiler body is prolonged.

The invention discloses an energy-saving and environment-friendly cupola. By adding equipment such as heat exchangers and dust collectors, the tail gas of the furnace is treated with heat energy recycling, dust removal and desulfurization, etc., so as to achieve energy saving (reduce coke consumption), It also has the effect of reducing pollution emissions (high-temperature gas, SO2, dust). At the same time, due to the use of hot air inlet technology, the furnace temperature is increased, the reject rate of casting products is reduced, and economic benefits are increased.

The invention belongs to a catalytic combustion-supporting additive for fire coals of a pulverized coal boiler of a fuel electric plant use, which is composed of powder and liquor. The manufacturing and the using of the additive is realized according to a mechanism that coal is pulverized to powder by a pulverizer and then is blown into the boiler for combustion, and the application of properties of high dispersivity, high permeability, and high catalysis of a high energy catalyst. The manufacturing method of the additive comprises the following steps: firstly, preparation of the powder, and secondly, preparation of the liquor. The using method of the additive is as follows: adding the additive into coals directly, and sending into a coal pulverizer to operate, so as to improve the quality of the pulverized coal, increase the activity of the pulverized coal, and promote the pulverized coal to combust fiercely and fully in the boiler; and spraying the liquor in vaporous to a high-temperature fire zone in the boiler to react with the baking-hot coal, so as to generate water gas to participate in and help the combustion to emit strong heat. The additive has the advantages of small dosage, good effect, and convenience in using, helps to combust efficiently, and has the effect of decoking and deashing.

The invention relates to active carbon preparation equipment particular for environmental friendly fruit shell active carbon activation furnace, which comprises: furnace body (1), top linkage flue (2), furnace base (4), flue gate valve (5), switch valve (6) for waste gas, steam and air, flue (7) and chimney (8); wherein, steam pump (10) connects to jet pipe (50), chimney (7) and thermal exchange room (30) to store the released heat quantity and heat the incoming boiler steam to 900-1100Deg; arc product path (28) comprises clay bricks of five to twelve types and seven A type except ten type. The product needs low investment and energy consumption.

Disclosed is a rice husk boiling hot blast stove. The rice husk boiling hot blast stove comprises a boiling hot blast stove body, a combustion chamber, an air outlet, a hood, an air blowing box, an air blower, an overhauling observation door, a disc feeder, a rice husk stock bin, a discharging pipe, an ash discharging hopper, an ash discharging valve, a hot air exchange chamber, a duplex ash discharging valve, an air exhaust opening, a water bath dust removal tower, an air exhaust pipe, a pool, a dust mud discharge opening and a wet ash pool. The boiling ho blast stove is characterized in that the combustion chamber is arranged in the boiling hot blast stove body, the air outlet is provided with the hot air exchange chamber, the hood is arranged on the lower portion, the air blowing box is connected with an air blowing pipe and the air blower, the disc feeder is arranged on an outlet of the rice husk stock bin, and is connected with the discharging pipe, the ash discharging hopper is arranged below the stove body, and is connected with the ash discharging valve, a hot air exchanger is mounted in the hot air exchange chamber, the ash discharging hopper and the duplex ash discharging valve are arranged below the hot air exchange chamber, the air exhaust opening in the rear portion is connected with an air inlet pipe of the water bath dust removal tower, and the air exhaust pipe is connected with an induced draft fan; wet ash is loaded in a forklift to be transported outwards, the boiling stove is simple in design and easy to operate, wastes are utilized as fuel, cost is saved, and the rice husk boiling hot blast stove is a very ideal energy-saving hot blast stove.

The invention provides an oxy-fuel combustion furnace used in low-expansion microcrystalline glass manufacturing. The oxy-fuel combustion furnace used in low-expansion microcrystalline glass manufacturing is characterized in comprising a cuboid-structured cavity and a furnace cover positioned on the top of the cavity. A steel-structured fixing frame is arranged on the periphery of the cavity and the furnace cover. A feeding port is arranged on a long side of the cavity. A flue is arranged on a short side of the cavity, and a glass discharge port is arranged on the other short side of the cavity. A bottom wall is arranged on the bottom of the cavity. Tank walls are arranged on two sides of the bottom wall, such that a glass tank furnace is formed. Parapets are arranged above the tank walls on the two sides. More than one burning lances are arranged at a certain height above the parapets. The burning lances comprise natural gas inlets and pure oxygen inlets.

The invention discloses an energy-saving and environment-friendly lime kiln for recycling waste heat of smoke. The energy-saving and environment-friendly lime kiln comprises a kiln body provided with a heat insulation layer, a hearth is arranged in the kiln body, an automatic feeding port is formed in the top of the hearth, an automatic ash discharging port is formed in the lower end of the hearth, and an annular smoke outlet flue is arranged at the top of the hearth. The energy-saving and environment-friendly lime kiln is characterized in that the smoke outlet flue is communicated with a desulfurization dust remover through a fan via a heat exchanger, an air inlet and an air outlet are formed in the heat exchanger, and the air outlet is communicated with an air inlet in the lower portion of the hearth through a fan. The temperature of air entering the hearth is increased through to heat exchange, oxygenated combustion supporting is promoted, the kiln temperature can be rapidly increased, an obvious energy-saving effect can be achieved, and the technical problem that in the prior art, waste heat of high-temperature smoke discharged out of a smoke outlet flue is not fully utilized is solved.

The invention relates to a heat dissipative recoverer for a fuel gas stove. The recoverer which is arranged on the upper end of various fuel stoves has a double-layer structure. The shape of the recoverer is similar to a ball strip body and inosculates to that of a pan body. The outer layer of the recoverer is a heat reflection cover body, the inner layer of the recoverer is a ball strip shaped heat collecting ring, and the gap between the two layers forms an exhaust returning annular path. The lower end of the path is provided with an annular exhaust baffle. A gap is arranged between an upturning part and the outer circle of the heat reflection cover body to from an exhaust suction annular path. Additionally, a supporting shelf with supporting legs which are flat and then are declining downwardly is arranged in the heat dissipative recoverer of the fuel gas stove so that the heat dissipative recoverer is suitable for flat bottom pans and round bottom pans. The recoverer brings convenience for frying and cooking and other demands in daily life. Meanwhile, the fuel gas stove with the recoverer saves energy by more than 30 percent, improves stove temperature by 28 percent, and has functions of wind resistance, stability and no extinguishment while a pan is washed.

The invention relates to the technical field of energy-saving and environment-friendly lime kiln furnaces and particularly relates to an energy-saving and environment-friendly automatic lime kiln furnace. The lime kiln furnace is provided with two brackets, wherein a kiln furnace is connected between the two brackets, a feeding assembly is arranged on the kiln furnace, an ash filtering plate assembly is connected to the kiln furnace in a sliding manner, and two ends of the ash filtering plate assembly are connected with two ends of an ash receiving seat; and an exhaust gas circulating controlprocessing component is arranged on the lime kiln and is connected with the feeding assembly. According to the lime kiln furnace, the waste heat of high-temperature smoke exhausted from the kiln furnace is adequately introduced into an air inlet of the kiln furnace, and air entering the kiln is heated through heat exchange, so that the oxygenation and combustion assisting are realized, and the furnace temperature can be rapidly increased; and the lime kiln furnace has the functions of automatically feeding and discharging ash.

The invention relates to a high-combustion-value biomass particle, which is characterized by being prepared from the following components by weight percent: 30 to 50 percent of bark, 25 to 40 percent of straw, 20 to 45 percent of wood chips, and 2 to 5 percent of combustion-supporting agent. The heated potassium chlorate or potassium permanganate is subsequently decomposed by manganese dioxide to release oxygen, so that oxygen can be supplemented in the entire combustion process of the biomass fuel. The condition of partial hypoxia can be alleviated and the biomass fuel can be completely combusted. Magnesium chloride has the effect of bulking the biomass fuel and preventing coking, thus contributing to the full contact of oxygen with the biomass fuel and the complete combustion of the biomass. After the combustion-supporting agent is used, both the furnace temperature and thermal efficiency can be improved.

The invention relates to a technology for smelting ferronickel from lateritic nickel ore by an electric furnace. The technology comprises the steps as follows: (1) raw material is pretreated: the lateritic nickel is counted as one ton, coal powder with the weight of 8-12 percent of the weight of the lateritic nickel or coke powder with the weight of 6-10 percent of the weight of the lateritic nickel is added into the lateritic nickel to be mixed uniformly and returned to a rotary kiln to be sintered at the temperature of 600 DEG C to 1000 DEG C for 3 to 6 hours, wherein, the pre-reduction of 20-30 percent of NiO is achieved; (2) the raw material is put into a submerged arc furnace to be smelted: an electric furnace magnesia and carbon mixture furnace lining is arranged; adjustable electric furnace voltage is set with the high voltage of 280-300V and the low voltage of 200-220V, and that is the high voltage starts arc, and after 30 minutes, the electric furnace is changed to low voltage for smelting and calcining an electrode; the charge of smelting furnace charging material consists of one ton of sintered nickel and 90-120kg of fusing agent lime; coke or coal is added as a reducer; the raw material and the auxiliary material are put into the electric furnace to be smelted; and (3) crude ferronickel is refined: liquid molten iron is put into a finery, and a refining agent is added for refining by oxygen blast. A product contains more than 13 percent of nickel, thereby satisfying the requirement of producing high-quality steel material product; and the recovery rate of nickel element is more than 95 percent. The technology has simple technology, saves energy and has high efficiency.

The invention relates to a high efficiency micro-discharge coal-fired hot water boiler. A smokeless chimney is installed with a low smoke discharging temperature, high thermal efficiency, a quick temperature elevating speed and high combustion efficiency. Since the chimney is smokeless, discharging indicators tend towards zero, so that effects of little burn, little discharge, scientific control, environmental protection and energy saving are implemented. The inventive boiler comprises a boiler body, one side of the boiler body is connected to a coal feeder, and the other side of the boiler body is connected to a fume channel waste heat recovery system which is connected to a desulfurization dust removing system. The boiler body comprises a combustion chamber, a chain grate is disposed under the combustion chamber, a main internal furnace and an accessorial internal furnace both of which are used as internal furnaces and communicate with each other are disposed above the combustion chamber sequentially, a water inlet is disposed on the main internal furnace, a hot water outlet and a smoke discharging pore are disposed on the accessorial internal furnace, and a fire averaging plate connected with a boiler crown is disposed in the combustion chamber. Heat transfer steel tubes are disposed in the main internal furnace and the accessorial internal furnace, a set of heat transfer steel tubes used as fire path one is disposed in the main internal furnace, and two sets of heat transfer steel tubes used as fire path two and fire path three respectively are disposed in the accessorial internal furnace.

The invention relates to water temperature monitoring method of crucible of blast furnace, in particular relates to a control method of water temperature difference alarm of crucible of blast furnace. Technical problems that fixed alarming points causes measurement lag are solved. The technical solution of the invention is: a control method of water temperature difference alarm of crucible of blast furnace comprises the step of regular alarming step after data collection, that is, alarming when the water temperature difference is 1.2 deg. C and heat current intensity is 10000kcal / m.sq. / h, further characterized in that comprising the step of grads alarm, composed of a first level alarming step and a second level alarming step; the first level alarming step is: alarming when the water temperature difference ascends 0.4 deg. C in hour hours and heat current intensity is 4000kcal / m.sq. / h; the second level alarming step is: alarming when the water temperature difference ascends 0.6 deg. C in hour hours and heat current intensity is 4000kcal / m.sq. / h. The invention is mainly applied to monitoring erosion of furnace body.