CN111706854B - Low NO of cyclone furnacexSystem for blending and burning gasified carbon residue - Google Patents

Low NO of cyclone furnacexSystem for blending and burning gasified carbon residue Download PDF

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Publication number
CN111706854B
CN111706854B CN202010501976.2A CN202010501976A CN111706854B CN 111706854 B CN111706854 B CN 111706854B CN 202010501976 A CN202010501976 A CN 202010501976A CN 111706854 B CN111706854 B CN 111706854B
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cyclone
cyclone furnace
water
air
central
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CN111706854A (en
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王长安
贾晓威
王超伟
张锦萍
王鹏乾
杜勇博
车得福
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Xian Jiaotong University
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Xian Jiaotong University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/006—Combustion apparatus characterised by the shape of the combustion chamber the chamber being arranged for cyclonic combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • F23K1/04—Heating fuel prior to delivery to combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/007—Supplying oxygen or oxygen-enriched air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/005—Drying-steam generating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
    • F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The invention discloses a low NO cyclone furnacexIn the system for blending and burning the gasified carbon residue, a water-cooling tube cluster is arranged at the center of a cyclone cylinder and a refractory material is laid to form a liquid slag film, so that the slag capturing rate of the cyclone furnace is improved and the gasified carbon residue is captured to be burned attached to the wall; the outer wall of the central water-cooling tube cluster is provided with a tube sleeve, a central powder feeding tube sleeve penetrates through the combustor and extends to a region where a liquid slag film begins to form in the middle of the central water-cooling tube cluster, and gasified carbon residues are preheated by the central powder feeding tube sleeve and then are intensively sent into a cyclone high-temperature region; high-oxygen-concentration airflow generated by the air film separator is sent into the central powder feeding sleeve to help gasified carbon residue to catch fire and burn, and the generated low-oxygen-concentration airflow supplements secondary air, so that the cyclone cylinder forms a deep air separation effect to reduce the NO fuelxThe amount of production; steam and slag water generated by cooling the liquid slag are used for a powder making system to improve the energy utilization efficiency of the cyclone furnace. The invention can realize the high efficiency and low NO of the gasified carbon residue in the cyclone furnacexCombustion, and improves the slag capturing rate and the energy utilization efficiency of the cyclone furnace.

Description

Low NO of cyclone furnacexSystem for blending and burning gasified carbon residue
Technical Field
The invention belongs to the field of thermal power generation energy conservation and emission reduction, and particularly relates to a cyclone furnace with high efficiency and low NO contentxThe system for blending and burning the gasification carbon residue is suitable for recycling the ash generated in the coal gasification process.
Background
The coal gasification process is a clean and efficient coal utilization technology, occupies a large market in the aspect of coal utilization at present, is limited by a process principle, generates a large amount of unburned carbon residues in the coal gasification process, and has great significance for the development of the coal gasification process for solving the problem that the gasified carbon residues are difficult to utilize.
Compared with raw coal, the gasified carbon residue has the advantages of finer particle size, higher ash content and ultralow volatile content, and has higher inertia and NO during combustionxThe conversion rate is not greatly influenced by ash content when a common cyclone boiler is used for combustion, and the combustion temperature can be met, but the retention time of the cyclone boiler in a cyclone cylinder is short due to the fine particle size, the cyclone boiler is difficult to burn out, and in addition, how to reduce NO of the cyclone boilerxThe discharge amount also becomes a new problem.
Disclosure of Invention
The invention aims to provide a cyclone furnace with high efficiency and low NO contentxThe system adopts a cyclone furnace to mix and burn the gasified carbon residue, and forms a deep air classification effect and an adsorption condition of the central wall surface of the cyclone by changing the arrangement mode of a water wall in the cyclone, an air inlet mode, a feeding mode and other measures, thereby achieving the purposes of efficiently burning the gasified carbon residue with the wall in the cyclone furnace and reducing the NO fuel in the cyclonexThe generated effect is that the liquid slag discharge waste heat of the cyclone furnace is used for a fuel pulverizing system, thereby achieving the effect of energy conservation and emission reduction of the cyclone furnace.
The invention is realized by adopting the following technical scheme:
high-efficiency low-NO cyclone furnacexThe system for blending and burning gasified carbon residue comprises an air compressor, a combustor, an air membrane separator, a central powder feeding sleeve, a cyclone cylinder, a central water-cooling tube cluster, a secondary combustion chamber and a cyclone furnace liquid slag waste heat utilization system; the cyclone furnace liquid slag waste heat utilization system comprises a granulation water tank, a separator, a drying chamber, a coal mill and fluidizationA bed dryer, a dust remover and a coal bunker; wherein the content of the first and second substances,
the central water-cooling tube cluster is arranged in the center of the cyclone, the upper and lower ports of the central water-cooling tube cluster are connected with the water-cooling wall on the inner wall of the cyclone, the refractory material is laid outside the central water-cooling tube cluster, the central powder feeding sleeve is sleeved outside the central water-cooling tube cluster and penetrates through a burner of the cyclone furnace and extends to the position where a liquid slag film on the outer wall of the central water-cooling tube cluster begins to form, the inlet of the central powder feeding sleeve is a gasified residual carbon air powder inlet, the inlet of the burner is a primary air powder inlet of raw fuel of the cyclone furnace, the inlet of an air compressor is a primary air inlet, the outlet of the air compressor is connected with an air film separator, and the;
the bottom of the cyclone cylinder is provided with an ash outlet, the ash outlet is connected with a granulating water tank, the granulating water tank is provided with a cooling water inlet, slag water and a low-temperature steam outlet, the steam outlet of the granulating water tank is connected with a heating pipeline in the middle of a secondary combustion chamber of the cyclone furnace, the slag water outlet of the granulating water tank is connected with a separator, a liquid outlet of the separator is connected with a drying chamber, the inlet of the drying chamber is a raw coal inlet, the outlet of the drying chamber is connected with a coal mill, the outlet of the coal mill is connected with a fluidized bed dryer, the outlet of the heating pipeline of the secondary combustion chamber is connected with the fluidized bed dryer, the outlet of the fluidized bed dryer is connected with a coal bunker and a dust remover, the outlet of.
The invention is further improved in that a flow valve is arranged on a pipeline connecting an outlet of the air film separator with an inlet of secondary air.
The invention is further improved in that the system is additionally provided with a gasification residual carbon air powder inlet on the basis of fuel feeding of the original cyclone furnace burner, and the gasification residual carbon is directly fed into a cyclone cylinder temperature zone from a central powder feeding sleeve.
The invention has the further improvement that a central water-cooling pipe cluster is arranged at the center of the cyclone furnace and a refractory material is laid, on one hand, gasified residual carbon is introduced into a central powder feeding sleeve to promote the central water-cooling pipe cluster to capture fine particle fuel to form a liquid slag film, and on the other hand, the liquid slag film captures fine particle fuel containing the gasified residual carbon to improve the slag capturing rate and the combustion rate of the cyclone furnace.
The invention has the further improvement that steam generated by cooling liquid slag is heated into superheated steam by a secondary combustion chamber of the cyclone furnace, the superheated steam is dried by a fluidized bed dryer, the dried low-temperature steam is mixed with low-temperature water separated from a granulating water tank in a drying chamber and exchanges heat with raw coal, the raw coal after primary drying is crushed by a coal mill and then is sent into the fluidized bed dryer for drying, and a low-temperature steam-water mixture at the outlet of the drying chamber is sent into the granulating water tank for recycling.
The invention has the further improvement that high-oxygen concentration airflow generated by the air film separator is sent into the central powder feeding sleeve of the cyclone cylinder to help gasified carbon residue to catch fire and burn and promote the outer wall of the central water-cooling tube cluster to generate a stable liquid slag film; the low-oxygen-concentration airflow generated by the air film separator is supplemented into a secondary air inlet of the cyclone furnace, so that the oxygen concentration of a hearth above the outlet of the central powder feeding sleeve of the cyclone cylinder is lower than that of a hearth at the lower part; the primary air oxygen concentration of the cyclone furnace burner is unchanged to ensure that the fuel is ignited; the control of the burnout air volume is combined, so that the excess air coefficient of the upper part of the cyclone cylinder is lower than 0.7, the excess air coefficient of the lower part of the cyclone cylinder is 0.7-0.8, the excess air coefficient in the secondary combustion chamber is 1.2, the fuel is combusted in a deep air classification mode, and the NO of the fuel in the cyclone furnace is reducedxThe amount of production; secondly, the gasified carbon residue and the raw fuel are separately sent to different positions of a hearth to reduce the combustion temperature at the inlet of the cyclone furnace and reduce the thermal NO of the fuelxThe amount of production.
The invention has at least the following beneficial technical effects:
the invention provides a cyclone furnace with high efficiency and low NO contentxThe system for blending and burning the gasified residual carbon adopts a central powder feeding sleeve which extends into a cyclone to preheat the gasified residual carbon, so that the gasified residual carbon is intensively conveyed into a high-temperature area of the cyclone to be burnt under the carrying of high-oxygen concentration airflow, and a liquid slag film formed on the central powder feeding sleeve of the cyclone is used for capturing the gasified residual carbon, thereby increasing the retention time of the gasified residual carbon in the high-temperature area and leading the gasified residual carbon to be efficiently burnt.
Furthermore, a liquid slag film can be formed by laying a water-cooling tube cluster made of refractory materials in the center of the cyclone cylinder, so that gasified carbon residue can be captured, and small-particle fuel in the cyclone cylinder can be captured to improve the slag capturing rate of the cyclone furnace.
Furthermore, the high-oxygen-concentration airflow formed by the air film separator is sent into the central powder feeding sleeve of the cyclone cylinder to promote the ignition and combustion of the gasified carbon residue and help the central powder feeding sleeve of the cyclone cylinder to form a liquid slag film, the formed low-oxygen-concentration airflow is introduced into the secondary air inlet of the cyclone furnace to reduce the oxygen concentration at the upper part of the cyclone cylinder, but the whole oxygen concentration of the cyclone cylinder is ensured to be unchanged, so that the upper part and the lower part in the cyclone cylinder form a deep air classification effect, and the NO of the fuel in the cyclone cylinder is reducedxThe generation rate and the effect of cyclone emission reduction are achieved, compared with the effect that secondary air is uniformly supplemented to the side wall of the cyclone from top to bottom, the air distribution mode of the invention has the difference that the excess air coefficients of different parts of the cyclone are changed by adjusting the oxygen concentration in the air distribution, the influence on the slag film on the inner wall of the cyclone is small, the low-oxygen concentration area range at the upper part of the cyclone can be enlarged, the achieved air classification effect is better, and the combustion of gasified residual carbon is more facilitated.
Furthermore, steam generated by cooling liquid slag in the granulating water tank is heated in the secondary combustion chamber, the formed superheated steam is a heat source of the fluidized bed dryer with high cost performance, and meanwhile, the dried low-temperature steam is mixed with low-temperature water generated by separating slag water to dry raw coal, so that the waste heat utilization rate of the cyclone furnace can be further improved, and finally, the low-temperature steam-water mixture at the outlet of the raw coal drying chamber is introduced into the granulating water tank to be recycled, so that the water resource utilization rate of the cyclone furnace can be improved.
Furthermore, the flow valve can adjust the air inlet flow, ensure the combustion effect of the rotating flow field in the cyclone cylinder and the gasified carbon residue, and simultaneously control the oxygen distribution condition in the cyclone cylinder to reduce the NO of the fuelxThe amount of production.
Furthermore, the liquid slag utilization system of the cyclone furnace adopts a slag-water separator to separate the slag, so that the purity of the heat exchange medium participating in the powder making system can be ensured.
In conclusion, the invention changes the arrangement mode of the water wall of the cyclone furnace, the air distribution mode, the feeding mode and the utilization mode of steam and slag water in the granulating water tank, can ensure that the gasified residual carbon can be efficiently combusted in the cyclone furnace aiming at the characteristic of small particle size of the gasified residual carbon, not only can solve the utilization problem of the gasified residual carbon, but also can improve the slag capturing rate and the energy utilization efficiency of the cyclone furnace and reduce the discharge amount of nitrogen oxides.
Drawings
FIG. 1 shows that the cyclone furnace of the present invention has high efficiency and low NO contentxThe structure schematic diagram of the blending-burning gasification carbon residue system;
FIG. 2 is a flow chart of the cyclone furnace liquid slag waste heat utilization system.
Description of reference numerals:
1-an air compressor; 2-a burner; 3-an air membrane separator; 4-central powder feeding sleeve; 5-flow valve; 6-a cyclone cylinder; 7-central water-cooled tube bundle; 8-a granulation water tank; 9-a secondary combustion chamber;
a-a primary air inlet; b, gasifying the residual carbon air powder inlet; c, a primary air powder inlet; d, a secondary air inlet; e-overfire air inlet; f-a smoke outlet.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in figures 1 and 2, the invention provides a cyclone furnace with high efficiency and low NO contentxThe system for blending and burning gasified carbon residue comprises an air compressor 1, a combustor 2, an air membrane separator 3, a central powder feeding sleeve 4, a flow valve 5, a cyclone 6, a central water cooling tube cluster 7, a secondary combustion chamber 9 and a liquid slag waste heat utilization system; the cyclone furnace liquid slag waste heat utilization system comprises a granulation water tank 8, a separator, a drying chamber, a coal mill, a fluidized bed dryer, a dust remover and a coal bunker.
Wherein, the outlet of the air compressor 1 is connected with the inlet of the air membrane separator 3, the low oxygen concentration airflow outlet of the air membrane separator 3 is connected with the secondary air inlet D of the cyclone cylinder, the high oxygen concentration airflow outlet is connected with the inlet of the central powder feeding sleeve 4, and the flow valve 5 is arranged on the outlet pipeline of the air membrane separator 3; the central water-cooling tube cluster 7 is arranged in the center of the cyclone 6, and the upper and lower ports of the central water-cooling tube cluster are communicated with the water-cooling wall on the inner side of the cyclone 6; the central powder feeding sleeve 4 penetrates through the cyclone furnace burner 2 and extends to the middle part of the central water-cooling tube cluster 7; the granulating water tank 8 is arranged at the lower part of the cyclone cylinder 6, the granulating water tank 8 is provided with a cooling water inlet, slag water and a low-temperature steam outlet, and the low-temperature steam is heated to superheated steam through the secondary combustion chamber 9 and is used for a liquid slag waste heat utilization system of the cyclone furnace.
Liquid slag in a cyclone cylinder enters a granulating water tank 8 for cooling, generated low-temperature steam is heated to superheated steam through a secondary combustion chamber 9 of the cyclone furnace and then is introduced into a fluidized bed dryer, an airflow outlet of the fluidized bed dryer is connected with an inlet of a dust remover, a dust outlet of the dust remover and a pulverized coal outlet of the fluidized bed dryer are connected to a coal bunker, and an airflow outlet of the dust remover is connected to an inlet of a heat exchanger of a raw coal drying chamber; a slag water outlet of the granulating water tank 8 is connected with a separator, and a water outlet of the separator is connected with an inlet of a heat exchanger of the drying chamber; the steam-water mixture outlet of the drying chamber is connected with a cooling water port of a granulating water tank 8; and the raw coal is dried by the drying chamber and then is sent to a coal mill for crushing, the outlet of the coal mill is connected with the particle phase inlet of the fluidized bed dryer, and the pulverized coal is dried by the fluidized bed dryer and then enters the coal bunker.
The combination of FIG. 1 and FIG. 2 shows that the cyclone furnace has high efficiency and low NOxThe implementation process of the blending-burning gasification carbon residue system is as follows:
raw fuel of the cyclone furnace enters the cyclone furnace from a primary air-powder inlet C of the cyclone furnace for combustion, and gasified carbon residue is sent into the cyclone furnace from a gasified carbon residue air-powder inlet B for combustion. The primary air inlet A is connected with an inlet of an air film separator 3, combustion assisting gas flows with different oxygen concentrations are generated by the air film separator 3, the high-oxygen-concentration gas flows carry gasified carbon residues and are preheated by a central powder feeding pipe sleeve 4 and then are sent into a cyclone 6, and the gasified carbon residues are captured by a liquid slag film on a central water-cooling pipe cluster 7 of the cyclone to be efficiently combusted; the airflow with low oxygen concentration generated by the air film separator 3 is mixed with secondary air and sent into a secondary air inlet D of the cyclone furnace to help the large-particle fuel sent by the burner 2 of the cyclone furnace to burn. Overfire air is fed into the secondary combustion chamber 9 through an overfire air inlet E to assist complete combustion of the fuel. Liquid slag generated by the cyclone furnace enters a granulating water tank 8 for water cooling, generated low-temperature steam is heated into superheated steam through a secondary combustion chamber 9 and used for drying pulverized coal by a fluidized bed dryer, the dried low-temperature steam is dedusted and then introduced into a drying chamber, the raw coal is dried together with low-temperature water separated from slag water generated by the granulating water tank 8 through a separator, and low-temperature steam water at the outlet of the drying chamber returns to the granulating water tank 8 for reuse; the raw coal is dried by a drying chamber and then sent to a coal mill for crushing, and then is sent to a coal bunker after being dried by a fluidized bed dryer.
The cyclone furnace provided by the invention has high efficiency and low NOxThe operation process of the blending-burning gasification carbon residue system is as follows:
the gasified carbon residue is preheated in a cyclone cylinder center powder feeding sleeve 4, ignition and combustion are assisted by high oxygen concentration airflow generated by an air film separator 3, liquid slag film at the lower part of a center water-cooling tube cluster 7 laid with refractory materials catches and burns efficiently, large particle fuel introduced by a cyclone furnace burner 2 burns under the action of primary air of the cyclone furnace, low oxygen concentration airflow generated by the air film separator 3 and secondary air formed by mixing air, and unburnt fuel is further burnt out under the action of over-fire air in a cyclone furnace secondary combustion chamber 9; ash slag generated by fuel combustion enters a granulating water tank 8 for cooling and waste heat is recovered through a liquid slag waste heat utilization system in the attached figure 2; the flue gas generated by the combustion of the fuel enters the flue gas heat exchange area at the tail part of the boiler from a flue gas outlet F of the secondary combustion chamber 9 of the cyclone furnace.
The key idea of the embodiment of the invention is that aiming at the characteristics of fine particle size and difficult combustion of the gasified residual carbon, reasonable measures are adopted to ensure that the gasification furnace can efficiently reduce NO in a cyclone furnacexThe combustion comprises the following specific measures: the gasified carbon residue is introduced into the cyclone cylinder central powder feeding sleeve 4 for preheating and is intensively sent into a cyclone cylinder high-temperature area; the high oxygen concentration airflow generated by the air film separator 3 helps the gasified carbon residue to be combusted and helps the lower part of the central water-cooling tube cluster 7 to form a liquid slag film; gasified carbon residue and cyclone furnace fine particle fuel are captured through a liquid slag film formed at the lower part of the central water-cooling tube cluster 7, the wall-attached combustion of the gasified carbon residue is facilitated, and the slag capturing rate of the cyclone furnace is improved; the low-oxygen-concentration airflow generated by the air film separator 3 forms a deep air separation system in the cyclone cylinder, so that the fuel on the upper part of the cyclone cylinder is combusted under the reducing atmosphere to reduce NO of the fuel of the cyclone furnacexThe amount of production.
According to the embodiment, the steam and slag water generated by cooling the liquid slag by the granulating water tank 8 in the cyclone furnace are used for the powder making system, so that the utilization rate of the residual heat of the slag and the overall energy utilization efficiency of the cyclone furnace are improved.
According to the embodiment, the classification effect of deep air in the cyclone can be controlled by adjusting the air film separator 3 and the flow regulating valve 5, the combustion effect of gasified carbon residue is ensured, and NO of the fuel of the cyclone furnace is reducedxThe amount of production.
In the embodiment, the air compressor 1 is added in front of the air membrane separator 3 to ensure the working efficiency of the air membrane separator 3.
According to the embodiment, the central powder feeding sleeve 4 of the cyclone furnace penetrates through the combustor 2 and extends to the place where the liquid slag film of the central water-cooling tube cluster 7 begins to form, so that the liquid slag film is generated on the wall surface of the central water-cooling tube, and the probability of catching gasified carbon residues by the slag film is improved.

Claims (6)

1. Low NO of cyclone furnacexThe system for blending and burning gasified carbon residue is characterized by comprising an air compressor (1), a combustor (2), an air membrane separator (3), a central powder feeding sleeve (4), a cyclone cylinder (6), a central water-cooling tube cluster (7), a secondary combustion chamber (9) and a cyclone furnace liquid slag waste heat utilization system; the cyclone furnace liquid slag waste heat utilization system comprises a granulation water tank (8), a separator, a drying chamber, a coal mill, a fluidized bed dryer, a dust remover and a coal bunker; wherein the content of the first and second substances,
the central water-cooling tube cluster (7) is arranged in the center of the cyclone cylinder (6), the upper and lower ports of the central water-cooling tube cluster are connected with the water-cooling wall on the inner wall of the cyclone cylinder (6), the outside of the central water-cooling tube cluster is laid with refractory materials, the central powder feeding sleeve (4) is arranged outside the central water-cooling tube cluster (7), the central powder feeding sleeve penetrates through a burner (2) of the cyclone furnace and extends to the position where a liquid slag film on the outer wall of the central water-cooling tube cluster (7) begins to form, the inlet of the central powder feeding sleeve (4) is a gasified residual carbon wind powder inlet (B), the inlet of the burner is a primary wind powder inlet (C) of raw fuel of the cyclone furnace, the inlet of the air compressor (1) is a primary wind inlet (A), the outlet of the air compressor is connected with the air film separator (3), and the outlet of;
the bottom of the cyclone cylinder (6) is provided with an ash outlet, the ash outlet is connected with a granulating water tank (8), the granulating water tank (8) is provided with a cooling water inlet, slag water and low-temperature steam outlets, a steam outlet of the granulating water tank (8) is connected with a heating pipeline in the middle of a secondary combustion chamber (9) of the cyclone furnace, a slag water outlet of the granulating water tank is connected with a separator, a liquid outlet of the separator is connected with a drying chamber, an inlet of the drying chamber is a raw coal inlet, an outlet of the drying chamber is connected with a coal mill, an outlet of the coal mill is connected with a fluidized bed dryer, an outlet of the heating pipeline of the secondary combustion chamber (9) is connected with a fluidized bed dryer, an outlet of the fluidized bed dryer is connected with a coal bunker and a dust remover, an outlet of the dust remover is.
2. A cyclone furnace low NO according to claim 1xThe system for blending and burning the gasified carbon residue is characterized in that a flow valve (5) is arranged on a pipeline of which the outlet of the air film separator (3) is connected with a secondary air inlet (D).
3. A cyclone furnace low NO according to claim 1xThe system for blending and burning the gasified carbon residue is characterized in that a gasification carbon residue air-powder inlet (B) is added on the basis of fuel feeding of an original cyclone furnace burner, and the gasified carbon residue is directly fed into a high-temperature area of a cyclone cylinder (6) from a central powder feeding sleeve (4).
4. A cyclone furnace low NO according to claim 1xThe system for blending and burning the gasified residual carbon is characterized in that a central water-cooling pipe cluster (7) is arranged at the center of the cyclone furnace, and a refractory material is laid, on one hand, the gasified residual carbon is introduced into a central powder feeding sleeve (4) to promote the central water-cooling pipe cluster (7) to capture fine particle fuel to form a liquid slag film, and on the other hand, the liquid slag film captures the fine particle fuel containing the gasified residual carbon to improve the slag capturing rate and the combustion rate of the cyclone furnace.
5. A cyclone furnace low NO according to claim 1xThe system for blending and burning the gasified carbon residue is characterized in that steam generated by cooling liquid slag passes through a secondary combustion chamber of a cyclone furnace(9) The pulverized coal is heated to superheated steam and dried by a fluidized bed dryer, the dried low-temperature steam is mixed with low-temperature water separated from a granulating water tank (8) in a drying chamber and exchanges heat with raw coal, the raw coal after primary drying is crushed by a coal mill and then is sent into the fluidized bed dryer for drying and then enters a coal bunker, and a low-temperature steam-water mixture at the outlet of the drying chamber is sent into the granulating water tank (8) for recycling.
6. A cyclone furnace low NO according to claim 1xThe system for blending and burning the gasified carbon residue is characterized in that high-oxygen-concentration airflow generated by an air film separator (3) is sent into a central powder feeding sleeve (4) of a cyclone cylinder to help the gasified carbon residue to catch fire and burn and promote the outer wall of a central water-cooling tube cluster (7) to generate a stable liquid state slag film; the low-oxygen-concentration airflow generated by the air film separator (3) is supplemented into a secondary air inlet (D) of the cyclone furnace, so that the oxygen concentration of a hearth above the outlet of the powder feeding sleeve (4) at the center of the cyclone cylinder is lower than that of a hearth at the lower part; the primary air oxygen concentration of the cyclone furnace burner (2) is unchanged to ensure that the fuel is on fire; the control of the burnout air volume is combined, so that the excess air coefficient of the upper part of the cyclone (6) is lower than 0.7, the excess air coefficient of the lower part of the cyclone (6) is 0.7-0.8, the excess air coefficient in the secondary combustion chamber (9) is 1.2, the fuel is combusted in a deep air classification mode, and the NO of the fuel of the cyclone furnace is reducedxThe amount of production; secondly, the gasified carbon residue and the raw fuel are separately sent to different positions of a hearth to reduce the combustion temperature at the inlet of the cyclone furnace and reduce the thermal NO of the fuelxThe amount of production.
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JPH11108308A (en) * 1997-09-30 1999-04-23 Miura Co Ltd Water tube boiler and burner
JPH11333411A (en) * 1998-05-25 1999-12-07 Nippon Steel Corp Electric melting furnace for ash treatment and method for operating the same
KR20010019081A (en) * 1999-08-24 2001-03-15 송권규 Combustor
KR20080001887U (en) * 2006-12-13 2008-06-19 문상원 Coke Boiler Heat Exchanger
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CN205560716U (en) * 2016-04-27 2016-09-07 烟台龙源电力技术股份有限公司 Cyclone -furnace firing device
CN206256029U (en) * 2016-10-14 2017-06-16 江西昌昱实业有限公司 A kind of split type dry coal dust gasification furnace of Quench
CN106556007B (en) * 2016-12-05 2018-09-14 重庆大学 A method of using the separation of deep or light thickness depth and Controllable-vortex stable combustion technology burning coal gasification semicoke particle
CN109578990B (en) * 2018-12-12 2019-10-11 西安交通大学 A kind of low NOx co-combustion system and method for pyrolysis oven-pulverized-coal fired boiler coupling
CN111140865A (en) * 2019-11-27 2020-05-12 上海交通大学 Composite reduction type low NOx emission device suitable for power station boiler
CN111102553A (en) * 2020-01-09 2020-05-05 兖矿集团有限公司 Novel vertical powder boiler system and using method thereof

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