4701 results about "Coke oven" patented technology

A coal compaction system and method for a non-recovery coke oven having refractory roof, floor, side walls and end doors for coal charging and coke discharge provides an improved coal charging machine carrying a coal conveyor supported intermediate the ends of the conveyor to avoid conveyor sagging and non-uniform depth of a deposited coal bed, a number of pressurized fluid-driven vibratory compactors mounted on an end of the charging machine and spaced-apart across the width of the coal bed and serving to compact the coal bed on a retraction stroke of the charging machine, a pivoted lifting frame mounted on the charging machine above the compactors and from which the compactors individually are suspended and are provided with individual supply of pressurized fluid, and a coke pusher head mounted on the charging machine behind the compactors and serving, when the lifting frame and associated compactors are raised, to push finished coke from the coke oven.

The invention provides a method for preparing hydrogen and LNG from coke oven gas. The method comprises the following steps: electric decoking; boosting of the coke oven gas by a compression system; cooling of the raw gas coke oven gas by using the BOG gas (the BOG gas is a gas formed after the passive heating gasification of LNG) of LNG in order to further remove tar, benzene, naphthalene and like substances in the coke oven gas; and pretreatment using a TSA process to finely remove macromolecular impurities, such as tar, benzene, naphthalene and the like; wet and dry two-stage desulfurization for removing sulfides in the coke oven gas; two-stage low pressure shifting for a reaction of CO and water vapor to form CO2 and hydrogen; and pressurization using a compressor, an MDEA solution process for removing carbon dioxide, a membrane separation technology for separating hydrogen and methane, separation, concentration and purification of the hydrogen and methane, and dehydration, demercuration and liquefaction of the separated high-concentration methane to obtain the LNG. The coke oven gas is finally converted into the hydrogen and the LNG which have high values, so the energy of thecoke oven gas is fully used, and the environment is protected.

An improved non-recovery coke oven floor constructed of a single layer of refractory bricks including, for each oven sole flue, a pair of trunnion bricks and a center bridge brick spanning the width of the flue, having lower brick surfaces in the form of an arch, and joined end-to-end by a tapered tongue-and-groove joint disposed approximately perpendicular to the direction of a compression load transmitted by the center bridge brick to the trunnion bricks.

The invention relates to the technical field of coke oven flue gas integrated utilization and pollution treatment and in particular relates to a coke oven flue gas waste heat utilization and purification method. The method is characterized in that flue gas waste heat is recovered by utilizing a flue gas waste heat recovery device, the temperature of the flue waste gas is reduced, and integrated desulfurization and denitration of the flue waste gas is realized by utilizing the activated adsorption capacity and low-temperature denitration catalytic capability of the coke. Compared with an existing process, the method has the beneficial effects that the flue waste gas desulfurization and denitration is performed under low-temperature working conditions, an additional heating system is not needed, and the energy consumption is reduced. In order to realize the desulfurization and denitration under low-temperature working conditions, the flue waste gas is cooled through the waste heat recovery device, so that the waste heat of the flue waste gas is fully utilized. The coke serves as a main catalyst for desulfurization and denitration and comes from a coking plant, the source is sufficient, and waste loss is avoided. The method disclosed by the invention can be widely applied to pollution treatment and integrated utilization of coke oven heated flue waste gas in coking production enterprises.

The invention relates to iron coke for a blast furnace and a preparing method thereof. The iron coke comprises 5wt%-20wt% of iron ore powder and 80wt%-95wt% of mixed coal; the mixed coal is formed by mixing 25wt%-29wt% of one third of coking coal, 40wt%-44wt% of coking coal, 7wt%-11wt% of lean coal, 6wt%-10wt% of gas-fat coal and 12wt%-16wt% of fat coal; the iron ore powder and the mixed coal are mixed uniformly with water and tamped before entering the blast furnace, and are placed into the blast furnace when the temperature is 800 DEG C, the temperature is increased at the speed of 2 DEG C per minute to 3 DEG C per minute, the iron ore powder and the mixed coal are discharged from the blast furnace when the temperature is 950-1050 DEG C, and the iron coke is obtained by adopting a wet way of quenching the coke. According to the iron coke and the preparing method, the performance, the ratio, the particle size and the composition and the like of the iron ore powder and the mixed coal are optimized, and the strength and the reactivity of the iron coke can meet the requirement of the blast furnace process under the circumstance of not adding binding agents.

Disclosed is a method which uses coke-oven gas as the raw material to produce liquefied natural gas; the method includes that the coke-oven gas is pretreated firstly to enable the tar, naphthalene and benzene impurities contained in the coke-oven gas to be purified deeply; and the purified coke-oven gas is processed with methanation reaction after compression and desulfurization; the liquefied natural gas product which contains CH4 with the content of more than 85% through the cryogenic separation process; the residual non-condensable gas is prepared to obtain the hydrogen with the purity of 99% through the PSA separation technique; the residual desorbed gas can be used as manufactured gas. The method which uses the coke-oven gas as the raw material to produce liquefied natural gas has the advantages of making full use of the compositions, saving energy, water and the investment, simple process and realizing the trinity coordinated development of economy, environment and energy sources.

A method for synthesizing and producing natural gas by hydrogen of coal gas and its synthesizer are disclosed. The process is carried out by purifying tar, crude removing sulfur, ammonia, benzene and naphthalene, compressing to 0.5-5.0 MPa, removing sulfur impurities, supplementing carbon 5-20 wt%, and methanation reacting to obtain final product. It saves energy resources and has no environmental pollution.

An improved corbel includes a first tier having first blocks and a second tier having second blocks. Each of the first blocks includes a first aperture extending through the block from a first surface to a back surface and a second aperture formed through a top surface of the block, extending into the first aperture. The first blocks are arranged on a substantially planar surface to align the respective first apertures to define a first passageway. Each of the second blocks includes a third aperture extending through the second block from a top surface to a bottom surface. The second blocks are disposed above the first tier to align the third aperture of each of the second blocks with the second aperture of the first blocks to form a second passageway.

A method and apparatus for quenching metallurgical coke made in a coking oven. The method includes pushing a unitary slab of incandescent coke onto a substantially planar receiving surface of an enclosed quenching car so that substantially all of the coke from the coking oven is pushed as a unitary slab onto the receiving surface of the quenching car. The slab of incandescent coke is quenched in an enclosed environment within the quenching car with a plurality of water quench nozzles while submerging at least a portion of the slab of incandescent coke by raising a water level in the quenching car. Subsequent to quenching the coke, the planar receiving surface is tilted to an angle sufficient to slide the quenched coke off of the planar receiving surface and onto a product collection conveyer and sufficient to drain water from the quenched coke.

A method and apparatus for transporting and quenching coke, useful in quenching a batch of coke produced in one of a plurality of coke ovens forming a coke oven battery, is disclosed. A hot car defining a substantially planar receiving surface is positioned adjacent a coke oven of the coke oven battery, and a unitary cake of unquenched coke is placed onto the hot car receiving surface. The hot car and unquenched coke are transported to a transfer station having a dust collection system. A quenching car is positioned at the transfer station adjacent the hot car, under the dust collection system. The unitary cake of unquenched coke is dumped into the quenching car receptacle, thereby separating the unitary cake. At least a portion of the dust generated by separation is collected. The quench car is then transported to a quenching station, where the separated coke is quenched.

The invention provide a method and apparatus for decreasing gas flow rates in a sole flue gas system for a coke oven during at least an initial coking operation after charging a coking oven with coal (43). The method includes providing a duct system (96, 98) between a first coke oven having a first coking chamber (18) and a second coke oven having a second coking chamber (18) to direct at least a portion of gas from a gas space (41) in first coking chamber (18) to the second coke oven thereby reducing a gas flow rate in the first sole flue gas system of the first coke oven. Reduction in sole flue gas flow rates has a beneficial effect on product throughput, the life of the coke oven and environmental control of volatile emissions from coke ovens.

An air chamber unit provided for a coke oven door enabling to suppress the generation of poor quality coke and reduce tar adhesion to coke oven door by accelerating coking reaction in the vicinity of coke oven door plug. An air chamber unit (17) is installed to control air supply to the bottom-less combustion space provided in hollow metallic coke oven door plug. For the purpose of long lasting stable air supply for said combustion space, air space (20) in the air chamber unit (17) is divided into two sections (A) and (B) by labyrinth partition to give different function for each of those section. Air intake pipe (27) is fitted in section (A) through bottom plate (21) of air chamber unit (17), wherein check valve plate (35) and other related components are provided as air supply control segments. Air supply pipe (30) or air delivery cup having one or more air inlet holes in upper portion is fitted in section (B) through bottom plate (21) of air chamber unit (17), wherein roles to remove contaminant particles suspended in backward flow gas are provided.

The invention provides a coke oven charging machine including a mobile frame and a coke oven feed device on the mobile frame. The coke oven feed device includes a movable, elongate charging plate having a first end and a second end, retractable side-walls adjacent the charging plate, first and second end walls adjacent the first and second ends of the charging plate and a shuttle section adjacent the first end of the charging plate for spanning an area between the first end of the charging plate and an entrance to the oven. The shuttle section has opposed shuttle side walls and a shuttle end wall. A charging plate moving device is provided for moving the charging plate into and out of the oven. The charging machine apparatus provides a means for quickly charging coking ovens with a compacted coal charge so that lower quality coals may be used to make metallurgical coke.

A method of testing the coking qualities of sample quantities of coal in a test container and the structure of the test container are disclosed. A test container which is ideally reusable is adapted to receive one or more samples of coal to be tested and then the test container is inserted into a coking oven along with additional, conventional coal during a conventional coking operation. Following the completion or substantial completion of the coking operation, the test container is recovered and from the conventional converted coke and the sample(s) of coke are removed from the container for testing and evaluation. The container is recharged with one or more additional samples of coke and reused in another conventional coking operation.

The invention relates to a coke oven flue gas desulfurization, denitration and waste heat recovery integrated method. Flue gas from a coke oven firstly enters a heating furnace to be heated to 300 to 400 DEG C, and then the flue gas enters a denitration device for removing nitrogen oxide in the flue gas through a denitration reducer and a denitration catalyst, wherein the denitration reducer is ammonia; and the flue gas discharged from the denitration device is subjected to heat recovery through a waste heat recovery device and cooled to 100 to 150 DEG C, and then the flue gas enters an ammonia desulfurization device for removing sulfur dioxide in the flue gas. Both a desulfurization absorbent and the denitration reducer in the method are ammonia, and public ammonia is supplied to a system, so that operation and maintenance work is reduced. The heating furnace for heating and the waste heat recovery device are arranged, so that the flue gas temperature reaches the optimal denitration and desulfurization reaction temperatures respectively, relatively high denitration and desulfurization efficiency can be achieved, and flue gas waste heat can be recycled for greatly reducing the operation cost of coke oven flue gas treatment.

A process and system for producing reducing gases are disclosed, wherein volatile components derived from coal are transformed into reducing gases suitable for utilization as synthesis gas, as a reducing agent for the direct reduction of iron ores and / or as a clean fuel.

The invention discloses the method for producing natural gas with coking gas, comprising the following steps: purifying coking gas and removing benzene, naphthalene, hydrocarbon and sulphide, compressing, heat transferring, carrying out methanation reaction with catalyst, hydrogen in COG reacting with carbonic oxide and carbon dioxide to get methane; putting the mixture gas into pressure swing adsorbing device, and getting natural gas whose concentration is 90%. The natural gas has high caloric value, low impurity content.

A process method of coking coal dust forming chiefly aims at settling the problem about a second dust emission in the course of transportation. First, the large quantity of small smut produced by a fluidized bed can be collected by a dust precipitator, be conveyed to a smut collecting storehouse, and constantly transmitted into a high pressure molding machine by an incessant closed conveyer. The feeding mouth of the high pressure molding machine is provided with a repressing screw to ensure the smut entering a high pressure rolling pair to be with certain pressure. Then the smut can be extruded into effigurate briquette, which at last is conveyed into a production coal conveying system after the molding. The process can prevent the production coal from producing the second dust emission during the transportation, thus reducing the engineering investment and environmental pollution with the advantages of less floor space and increasing the coke yield produced by coke oven.

The invention discloses a coke oven top waste heat reclaiming system, which mainly consists of a coke oven top large pit (1) and an oven top quarry tile (2) covering the surface of the top of the large pit. The system is characterized in that a poriferous steel plate (3), a thermal baffle layer (4) and a poriferous steel plate (3) are sequentially arranged from bottom to top in the coke oven top large pit (1), and inner gaps of the coke oven top large pit (1) are filled with heat-resisting sealing slurry (5). According to the invention, through the measures that poriferous steel plates and the thermal baffle layer are arranged in the coke oven top large pit (1), the gaps are filled with the heat-resisting sealing slurry and the like, the temperature of the coke oven top surface can be effectively reduced, the heat preservation effect is very obvious, the energy-saving effect is very ideal, and the energy-saving rate can reach 0.4KW / m2.

The invention discloses a composite fire-proof material with high refractoriness under load for coke ovens. The preparation method of the material comprises the following steps of: evenly mixing and crushing 40%-60% of Al2O3, 15%-30% of SiC micro powder, less than 2% of Fe2O3, 5%-10% of Si micro powder and 1%-3% of cement as an additive; adding 3%-5% of Al(H2PO4)3 as an adhesive and stirring and mixing evenly; and pouring the mixture to a working region in 20-30 minutes. The furnace-building process comprises the following steps of: cleaning a kiln, measuring, molding, positioning and supporting a mould, adding materials, pouring and correcting, cleaning, starting for warming up and testing. The coke ovens newly built by pouring is characterized in that the top of the chamber of the furnace is fan-shaped, the chamber of the furnace is built by on-site seamless overall vibration pouring according to the process above with the furnace-building materials above, afterheat of the furnace can be recycled for power generation and no chemical residues exist. The furnace is short in charring time and higher in coke recovery and can be started and used at any time between the normal temperature and 1550 DEG C.

The invention relates to a comprehensive utilization synthesis process of natural gas employing methanation of coke oven gas, belonging to the technical field of new energy utilization. The process comprises the following steps: compressing coke oven gas, preliminary cleaning, removing sulfur, performing first section methanation, performing second section methanation and separating natural gas toprepare natural gas which reaches the grade A technological requirements of natural gas national standard (GB17820-1999). The synthesis process of natural gas employing methanation of coke oven gas reaches the aim of high effective comprehensive utilization of natural gas and provides a new way of preparing and synthesizing natural gas.

The invention discloses a method for synthesizing methane by utilizing oven gas. Product gas with methane concentration of more than 90 percent is obtained through the main steps of purifying to remove impurities, compressing to exchange heat, adding water vapor, first stage of methanation reaction, second stage of methanation reaction, third stage of methanation reaction, PSA methane separation and the like. By adopting the method and utilizing the oven gas as raw materials, synthetic natural gas with high content of methane, low content of impurities and high heating value can be obtained, which is favorable to protecting the environment, saving energy and developing new energy; in addition, in the method, the addition of appropriate water vapor in the raw materials of oven gas before the fist sage of reaction properly inhibits the depth of the methanation reaction, reduces the heat amount released in the whole reaction process, conduces the cooling of the gas after the reaction and prevents the occurrence of carbon deposition reaction to devitalize the activity of a catalyst, thus being beneficial to the continuous normal operation of the whole synthesizing process.

A coke oven includes an oven chamber, an uptake duct in fluid communication with the oven chamber, the uptake duct being configured to receive exhaust gases from the oven chamber, an uptake damper in fluid communication with the uptake duct, the uptake damper being positioned at any one of multiple positions, the uptake damper configured to control an oven draft, an actuator configured to alter the position of the uptake damper between the positions in response to a position instruction, a sensor configured to detect an operating condition of the coke oven, wherein the sensor includes one of a draft sensor, a temperature sensor configured to detect an uptake duct temperature or a sole flue temperature, and an oxygen sensor, and a controller being configured to provide the position instruction to the actuator in response to the operating condition detected by the sensor.

The present invention is one kind of coke coal blending ratio and coking process. The coke coal consists of fat coal 20-23 weight portions, coking coal 50-55 weight portions, 1 / 3 coking coal 15-20 weight portions, and lean coal 8-12 weight portions. The compounded coal has the quality including ash content 9-10 %, sulfur content 0.65-0.73 %, volatile component 24-26 %, G value 83-88, Ymm of 16-20, and Xmm of 20-30. The quality parameters, vitrinite reflectances and microscopic ingredients of the said four kinds of coal are specifically defined. During the coking process, the mixed coal material is sintered at 1200 deg.c for not less than 16 hr. The present invention can obtain coke with high strength.

An electric-substituting natural gas combined system and process based on coal gasification and methanation are disclosed. The process is carried out by delivering oxygen, powdered coal or water-gas slurry into gasified apparatus, recovering for crude gasified gas by wet heat, delivering into sulfur-resisting carbon monoxide carbon reactor, adjusting hydrogen-carbon ratio, entering into desulfurizing decarbonizer, recovering elementary sulfur while enriching carbon dioxide, delivering synthetic gas into methane reactor to generate substituted natural gas as domestic gas partially, entering into gas and steam combined circulator partially, and entering into substituted natural gas storage tank partially. It integrates coal gasified, methanation and gas steam combined circulation together, it's efficient and clean, has better utilizing rate, no CO2 discharge and need for changing gas turbine or load.

A device for feeding and controlling secondary air from secondary air ducts into flue gas channels of horizontal coke oven chambers is shown. The flue gas channels are located underneath the coke oven chamber floor on which coal carbonization is realized. The flue gas channels serve for combustion of partly burnt coking gases from the coke oven chamber. The partly burnt gases are burnt with secondary air, thus heating the coke cake also from below to ensure even coal carbonization. Secondary air comes from the secondary air ducts connected to atmospheric air and to the flue gas channels. Controlling elements are mounted in the connecting channels between the flue gas channels and secondary air ducts which can precisely control the air flow into the flue gas channels. Thereby, it is possible to achieve a much more regular heating and heat distribution in coke oven chambers. The actual controlling devices in the connecting channels can be formed by turnable pipe sections, wall bricks, or metal flaps. It is particularly advantageous to utilize a hump-like facility (tabouret) which sits in the secondary air ducts and which is comprised of a tabouret plate with a central opening that is slid under the corresponding embranchment to regulate the gas stream. The controlling mechanism can be actuated manually, electrically, or pneumatically. Thereby, the controlling device can also be automated.