30results about How to "Improve fire conditions" patented technology

A smokeless combustion device with fire stack in furnace consists of destructive distillation gasification combustion chamber, the second combustion chamber, top fire grate, bottom fire grate, fire stack in furnace, firepot, heated surface and fender. The extensive fuel materials such as raw coal, bulk coal, section coal, wood, straw and agricultural wastes can be used as fuel material of said device.

The invention provides a small-wave flame disturbance extension combustion device, which comprises a main body and at least two grooves, wherein the main body is a hexahedron; the hexahedron comprises an upper surface, a lower surface, a front surface, a back surface and two side faces; the side faces are fixedly connected with the side wall of a chain furnace; the back surface is fixedly connected with the front arch surface or the back arch surface of the chain furnace; and the front end of the main body passes from the upper surface to the lower surface, so that the grooves are formed. Due to the adoption of the small-wave flame disturbance extension combustion device provided by the invention, the disturbance of flue gas is enhanced remarkably, the combustion of combustible matters in the flue gas is enhanced, the temperature of the flue gas is raised, thermal radiation on a coal bed is enhanced, the coal bed firing condition of the chain furnace can be improved remarkably, and the adaptability of the chain furnace to coal quality is enhanced. The small-wave flame disturbance extension combustion device is suitable for boiler design and technical reconstruction of the conventional boiler.

The invention relates to a cycle fluid bed high-temperature hot wind furnace, which comprises a hearth, a separator, a wind distributor, a material feeder, a high-low temperature exchanger and an airpreheat device. The invention is characterized in that: the hearth uses direct-current boiler type; the ascending tube uses three parallel tubes, to increase the heated area, avoid high-temperature smoke brushing the wall, and prolong the service life of wall; and guiding tail smoke into the secondary wind, to circulate the smoke and adjust the smoke temperature, strengthen the heat transmission and realize quick load adjustment; the air preheat device has a torsion plate as the turbolator to strengthen the heat transmission; and uses interlayer heater to confirm the clearness of hot wind; andcalculating each part, to select steel according to the temperature to reduce the consumption and refractory steel and reduce cost, based on confirmed strength.

The invention discloses a little oil burner of a double-sided ignition combination blunt body. A primary air pipeline is communicated with a secondary coal dust combustion chamber through a section of coal dust concentrator formed by a tapered pipeline with a throat part formed through invagination, a primary coal dust combustion chamber is arranged in the secondary coal dust combustion chamber, and the secondary coal dust combustion chamber extends into a tertiary coal dust combustion chamber. The upper side surface and the lower side surface of the tertiary coal dust combustion chamber connected with the secondary coal dust combustion chamber are provided with a plurality of secondary air inlets in equal intervals, an upper oil combustion chamber and a lower oil combustion chamber are arranged on the primary coal dust combustion chamber after aslant penetrating through the secondary coal dust combustion chamber, a combination blunt body is arranged at the port of the secondary coal dust combustion chamber, and a plurality of through-flow holes are arranged on the upper surface and the lower surface of the second coal dust combustion chamber positioned in the tertiary coal dust combustion chamber. By adopting the top and bottom arrangement of two oil guns, coal dust entering into the primary coal dust combustion chamber are ignited in a double side way, which strengthens turbulent mass and heat exchange of coal dust current and oil flame to rapidly heat the coal dust and form a fire curtain, thereby prolonging the residence time of the coal dust and strengthening the ignition process.

The invention belongs to the technical field of pulverized coal combustion, and discloses a method for jointly controlling the emission of NOx by utilizing multi-stage bias combustion and fuel reburning. The method comprises the steps: arranging a multi-stage bias burner containing 2 to 6 layers of bias burners in a multi-stage bias combustion area, sending 75 to 85 percent of fuel into the multi-stage bias combustion area, and generating flue gas containing the NOx during the combustion; spraying mixed reburning fuel of 15 to 25 percent of coal and biomass fuel into a mixed reburning area, forming a reburning reduction area, precipitating CHi and NHi active groups by the mixed reburning fuel in reducing atmosphere, and reacting the CHi and NHi active groups with the NOx generated in the multi-stage bias combustion area to be reduced into N2; and spraying the air into a burnout area, and completely combusting combustible substances which are not completely combusted. The method can efficiently control the emission of the NOx, ensure that the removal efficiency of the NOx is more than 80 percent, realize the combustion of high pulverized coal concentration, improve the performance of ignition and steady combustion, improve the adaptability of coal types, effectively prevent the slag bonding of water-cooled walls, and achieve the aims of improving boiler efficiency, saving energy and reducing consumption.

The invention is the outer cyclone inner direct flow main combustor device and belongs to the combustor device of boiler. The purpose of the invention is to produce the backflow area and the stable combustion. One device of the invention is to evenly arrange the delivery blades between the primary air diverting tube and the delivery tube, and the inside diameter of the delivery tube is as 0.5-0.7 times as the diameter of the primary air diverting tube. The other device is to evenly arrange the delivery blades in the inner chamber of the primary air diverting tube, and the axial height of the delivery blades is as 0.1-0.5 time as the semi-diameter of the primary air diverting tube. The invention through changing the opposite angles, the number, the length and the height of the delivery blades and the lengths and the section of the delivery tube to change the intensity and the size of the cyclone amount to adapt the characteristics of different fuels and ensure the stability and economy of the boiler combustion. The invention has simple structure and convenient equipment.

The invention provides an oxygen-enriched combustion W-shaped flame boiler system and a combustion process thereof. Flue gas discharged from a dewaterer is divided into two strands, wherein one strand of flue gas sequentially enters a desulfurization device and a CO2 recovery device and the other strand of flue gas enters a gas-gas heat exchanger and is heated by flue gas in a main flue; the flue gas in the main flue also heats O2 separated in the air when heating the recycled flue gas; the heated recycled flue gas is divided into three strands; O2 is divided into two strands; after the first strand of O2 is mixed with the first strand of recycled flue gas, the mixed gas enters a coal mill and enters a primary air pipeline; after the second strand of O2 is mixed with the second strand of recycled flue gas, the mixed gas enters a furnace arch secondary air pipeline; and the third strand of recycled flue gas enters a front and rear wall secondary air pipeline The system provided by the invention overcomes the defects in the prior art and greatly improves ignition conditions of a hearth; when the radiation and heat adsorption area of a lower hearth is effectively increased, slag-bonding possibility is greatly reduced; efficiency of the integral system is improved; steel consumption and manufacturing cost of a boiler are reduced; and zero emission of CO2 can also be realized.

The invention discloses an online adjusting system for jet-stream distribution of pulverized coal, comprising: a pulverized coal distributor distributing pulverized coal at an outlet of a splitter ofa coal pulverizer into branch pipes connected in parallel; a pulverized coal concentration online-measuring device performing real-time online measurement of pulverized coal concentration in the branch pipes; a stream-jetting device including a jet nozzle and a pneumatic pump, the stream-jetting device jetting high-speed stream into the pulverized coal distributor from the jet nozzle according toan online measurement of pulverized coal concentration in the branch pipes, and thereby improves pulverized coal distribution in the branch pipes, and improves a phenomenon of uneven distribution of pulverized coal among burners in the same layer.

The invention provides a system for increasing a pulverizing and drying output force during doped lignitous coal burning of a burning bituminous coal boiler, and relates to a doped lignitous coal burning system of the burning bituminous coal boiler in order to solve the problem that thermal power generation enterprises adopting the conventional doped lignitous coal burning mode has potential safety hazard and poor running economy. A primary air fan is communicated with the first section of a hot primary air pipeline through a cold primary air pipeline and a rotary air preheater; the first section of the hot primary air pipeline is communicated with a second section of the hot primary air pipeline through a connecting piece with a square top and a round bottom; the second section of the hot primary air pipeline is connected with a hot primary air female pipe through the third section of the hot primary air pipeline; the hot primary air female pipe is communicated with the hot primary air branch pipeline; the outlet of a micro-oil ignition small oil gun is communicated with the second section of the hot primary air pipeline; and at least one thermocouple is arranged on the second section of the hot primary air pipeline and the third section of the hot primary air pipeline. The system is used in the doped lignitous coal burning system of the burning bituminous coal boiler.

The invention provides a pulverized coal distributor allowing double angles to be adjusted. A pulverized coal inlet is formed in the lower part of a middle casing; two spindly baffles are arranged in the pulverized coal inlet; a diffusion tube section is arranged in the lower part of the middle casing, and two symmetric pulverized coal outlets are formed in the upper part of the middle casing; a middle partition board is arranged between two pipelines of the pulverized coal outlets; louvers are mounted in a cavity of the middle casing. Wear-resistant ceramic is attached to inner walls of the pulverized coal inlet, the diffusion tube section, the middle casing and the pulverized coal outlets, and the louvers and the middle partition board are overall made of wear-resistant ceramic through firing. Pulverized coal and air at the outlets are uniformly distributed by adjusting the louvers, the middle partition board and the spindly baffles in the pulverized coal distributor, the ignition condition of a burner is good, burning in a boiler is stable, and the safety and the economical performance of the unit are improved. Besides, the pulverized coal distributor allowing double angles to be adjusted is simple to adjust, wear-resistant, free from leaking, long in service life and suitable for being mounted in narrow space.

The invention provides a post-combustion burner for diesel engines. The outer cylinder wall of the burner is nested and arranged outside the inner cylinder wall of the burner. One end of the inner cylinder wall of the burner is sealed and an ignition gun and an oil gun are arranged. The inner cylinder of the burner The other end of the wall is opened as the flue gas outlet, and there are flue gas inlets on the inner cylinder wall of the burner and the side wall of the outer cylinder wall of the burner; Set behind the nozzle of the burner. The invention improves fuel ignition conditions by preheating air, and ensures the normal combustion of fuel with a small flow rate during low-power and low-oxygen operation; the two-stage atomization method makes fuel particles smaller in diameter and more evenly distributed Combustion is better in an oxygen environment; by adjusting the relative position of the inner and outer sleeves of the oil gun, the fuel flow can be adjusted to facilitate more precise control of the exhaust temperature; the two-stage nozzle structure at the head of the oil gun can fully accelerate the fuel and atomization medium, and strengthen The atomization effect makes the fuel burn better.

The invention discloses a methanol diesel fuel complex additive and a preparation method thereof. The complex additive is prepared from the following raw materials in parts by volume: 1-4 parts of diethyl phthalate, 1-8 parts of n-butylamine, 1-9 parts of isooctanol, 1-6 parts of cyclohexanone, 13-42 parts of lauryl methacrylate, 7-30 parts of mixed fatty glyceride, 1-5 parts of phenyl propargyl ether, 1-8 parts of dihexadecyl dimethyl ammonium chloride, 2-12 parts of ethyl formate, 2-14 parts of isooctyl nitrate and 1-6 parts of polyoxyethylene hexadeeylalkyl ether selies. The methanol diesel fuel complex additive can enable methanol diesel fuel to be evenly mixed and to be stably stored for more than 6 months, which effectively improves the fire behaviour of the methanol diesel fuel andinhibits the volatilization when the methanol content is higher; moreover, the production process is simple and the use is convenient, thereby being beneficial to the popularization and application of the methanol diesel fuel.

The invention relates to an auxiliary starting decompression device for a two-cylinder diesel engine. Wait. The valve rocker arm support is fixedly connected to the cylinder head by bolts, the valve rocker arm shaft is fixed in the shaft hole of the valve rocker arm support through the support top screw, and the valve rocker arm support lug through hole is sleeved on the decompression shaft superior. Both threaded holes on the decompression shaft are provided with decompression adjustment screws respectively corresponding to the longitudinal positions of the first and third valve rocker arms, and are locked by nuts. The end of the decompression adjustment screw is correspondingly abutted against the rear end of the long arm spherical contact of the first and third valve rocker arms. The flat groove at the end of the decompression shaft is keyed to the rear end of the decompression shaft. The present invention is simple in structure, only needs to add the decompression control device on the cylinder head cover, add a decompression shaft and decompression adjustment screw on the rocker arm part.