CN218510872U - Oxygen carrier auxiliary combustible solid waste fluidized bed combustion device - Google Patents
Oxygen carrier auxiliary combustible solid waste fluidized bed combustion device Download PDFInfo
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- CN218510872U CN218510872U CN202222692370.9U CN202222692370U CN218510872U CN 218510872 U CN218510872 U CN 218510872U CN 202222692370 U CN202222692370 U CN 202222692370U CN 218510872 U CN218510872 U CN 218510872U
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- fluidized bed
- oxygen carrier
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- 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
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Abstract
The utility model relates to a solid useless processing technique field specifically is a solid useless fluidized bed burner of supplementary flammable of oxygen carrier, and it can improve the burning stability and the combustion efficiency of flammable solid useless greatly, and it includes the fluidized bed device, the solid useless feeder of fluidized bed device connection, the smoke inlet of separator is connected at fluidized bed device top, the export flue is connected to the outlet flue of separator, a serial communication port, the lower part of fluidized bed device is the rapid cycle fluidized bed that swell fluidized bed, upper portion promoted the section for binding off structure, oxygen carrier feeder is connected to the upper portion promotion section of fluidized bed device, the returning charge mouth of separator is connected the upper portion promotion section of fluidized bed device, the bottom plenum of fluidized bed device with set up in the secondary wind gap that fluidized bed device's upper portion promoted the section all connects the forced draught blower, be provided with heated surface, deNOx systems, dust pelletizing system, desulfurization system in the export flue.
Description
Technical Field
The utility model relates to a solid useless processing technology field specifically is a supplementary combustible solid useless fluidized bed burner of oxygen carrier.
Background
China is the world with the largest amount of solid wastes, and has the characteristics of high solid waste generation intensity, low resource utilization degree, many illegal transfer and dumping events and the like. The active promotion of the 'reduction, recycling and harmless' treatment of solid wastes becomes a scientific and technological problem to be solved urgently in the 'fourteen-five' green development plan. The incineration technology has become one of the main treatment modes of combustible solid waste at home and abroad due to the advantages of land saving, large treatment capacity, realization of heat utilization and the like. Fluidized bed combustion as a clean combustion technology with fuel adaptability, flexible furnace temperature and load control and low NO x Has remarkable advantages in the aspects of emission, combustion efficiency and the like, and is widely applied to the incineration of various combustible solid wastes.
However, combustible solid waste is generally characterized by complex composition, poor flowability, low energy density, high volatile content, and the like. The combustion in the fluidized bed causes the problems of accumulation of fuel near the feeding point and layering with bed materials, and the like, and causes the problems of non-combustion and non-distribution of the fuel along the cross section direction of the hearthAll the above steps are carried out. These can cause poor combustion stability of the solid waste fluidized bed and CO and NO in the flue gas x And the pollutant discharge fluctuation is large, thereby bringing low combustion efficiency. Therefore, the realization of clean and efficient combustion of combustible solid waste in the fluidized bed boiler is an important way for reduction treatment and resource utilization of the combustible solid waste.
SUMMERY OF THE UTILITY MODEL
Poor in order to solve current combustible solid useless combustion stability, problem that combustion efficiency is low, the utility model provides a supplementary combustible solid useless fluidized bed burner of oxygen carrier, it can improve combustible solid useless combustion stability and combustion efficiency greatly.
The technical scheme is as follows: the utility model provides an oxygen carrier auxiliary combustible solid useless fluidized bed burner, its includes the fluidized bed device, the fluidized bed device is connected solid useless feeder, the fluidized bed device top is connected the smoke inlet of separator, the outlet flue is connected to the smoke outlet of separator, its characterized in that, the lower part of fluidized bed device is the rapid cycle fluidized bed that the swell fluidized bed, upper portion promote the section and be the binding off structure, the oxygen carrier feeder is connected to the upper portion of fluidized bed device promotion section of upper portion of fluidized bed device, the material returning mouth of separator is connected the upper portion of fluidized bed device promotes the section, the bottom plenum of fluidized bed device with open locate the secondary wind gap of the upper portion promote the section of fluidized bed device all connects the forced draught blower, be provided with heating surface, deNOx systems, dust pelletizing system, desulfurization system in the outlet flue.
The system is further characterized in that the solid waste feeding device is connected with a solid waste bin, and the oxygen carrier feeding device is connected with an oxygen carrier bin;
the separator comprises a cyclone separator, an impact separator and a shutter type separator;
the solid waste feeding device comprises a screw feeder, a belt conveying and feeding device, a scraper feeder, a star feeder and a vibrating feeder.
After the utility model is adopted, the fuel is firstly combusted in the lower part of the fluidized bed device and the primary air with low chemical equivalent ratio, and the low NO is rapidly generated x The reducing product of flue gas and reducing gasThe atmosphere can be NO x Reduction to N 2 Reduction of fuel nitrogen to NO x In a ratio of (B) to (C), low NO produced x 、Combustible gas enters an upper lifting section of the fluidized bed device, oxygen carrier particles have the capability of absorbing and releasing oxygen, the uniformity of oxygen and temperature distribution in the upper lifting section can be improved, the combustion stability and combustion efficiency of fuel are improved, and the clean and efficient resource utilization rate of solid waste is greatly improved; further, a portion of the active component of the oxygen carrier particle may catalyze NO x The reduction of (2) is favorable for improving the denitration efficiency of the SNCR system in the outlet flue and improving the exhaust emission standard.
Drawings
Fig. 1 is a schematic view of the device of the present invention.
Detailed Description
Referring to fig. 1, an oxygen carrier auxiliary combustible solid waste fluidized bed combustion device comprises a fluidized bed device 1, the fluidized bed device 1 is connected with a solid waste feeding device 3, the top of the fluidized bed device 1 is connected with a smoke inlet of a separator 6, a smoke outlet of the separator 6 is connected with an outlet flue, the lower portion of the fluidized bed device 1 is a bulge fluidized bed, an upper lifting section of the fluidized bed device 1 is a fast circulating fluidized bed with a closing structure, the upper lifting section of the fluidized bed device 1 is connected with an oxygen carrier feeding device 5, the solid waste feeding device 3 is connected with a solid waste bin 2, the oxygen carrier feeding device 5 is connected with an oxygen carrier bin 4, a material returning port of the separator 6 is connected with the upper lifting section of the fluidized bed device 1, a bottom air chamber of the fluidized bed device 1 and a secondary air port arranged at the upper lifting section of the fluidized bed device 1 are both connected with an air feeder 10, a heating surface (not shown in the figure) is arranged in the outlet flue, a denitration system 7, a dust removal system 8 and a desulfurization system 9 are arranged in the outlet flue, a chimney 11 is connected with the tail portion of the fluidized bed device 1, a slag discharging port is arranged at the bottom of the fluidized bed device 1.
The separators 6 include cyclone separators, impingement separators and louvered separators.
The solid waste feeding device 3 comprises a screw feeder, a belt conveying and feeding device, a scraper feeder, a star feeder and a vibrating feeder.
The utility model utilizes the lower part asThe bulge fluidized bed and the combustion device of the rapid circulating fluidized bed with the oxygen carrier assisting at the upper lifting section improve the solid waste combustion efficiency and reduce the loss and the supplement cost of the oxygen carrier. Firstly, combustible solid waste is fed into the lower part of the fluidized bed device 1, and combustion with low stoichiometric ratio is carried out under the organization of primary air, so that a large amount of low NO is generated x High reducing flue gas (containing H) 2 O、CO 2 、CO、H 2 、C x H y And NH 3 Etc.) into the upper lift section; oxygen carrier particles with oxygen absorbing and releasing capacity assist in fuel conversion in a loop formed by the lifting section and the separator, and fuel conversion efficiency is improved. In addition, the oxygen carrier only circulates in a circulation loop formed by the lifting section and the separator, so that on one hand, the oxygen carrier cannot damage the reducing atmosphere below secondary air, and the NO is reduced x Original discharge; on the other hand, the oxygen carrier can not be discharged out of the hearth along with the slag, and the loss and the application cost of the oxygen carrier can be reduced.
Specifically, the combustion method of the oxygen carrier auxiliary combustible solid waste fluidized bed device comprises the following steps:
(1) Combustible solid waste is sent into the lower part of the fluidized bed device and is mixed with primary air under the assistance of fuel ash and inert bed materials to be combusted at 650-950 ℃, the chemical equivalence ratio is less than 1, and a large amount of low NO is generated in flue gas due to insufficient oxygen below a secondary air port x Reducing combustible gas and crushed coke particles with smaller size;
(2) Low NO produced in step (1) x The reducing combustible gas and smaller coke particles enter the upper lifting section of the fluidized bed device along with the fluidized medium and are mixed with secondary air fed by the air feeder to carry out combustion reaction at 650-950 ℃;
(3) Oxygen carriers are fed into an upper lifting section of the fluidized bed device, oxygen and combustible gas in the flue gas and oxygen carrier particles in the upper lifting section are subjected to oxidation-reduction reaction, so that the oxygen and fuel are distributed more uniformly, and the fuel conversion rate is improved;
(4) After the flue gas and oxygen carrier particles at the upper lifting section of the fluidized bed device enter the separator, the oxygen carrier particles are captured by the separator and return to the lower part of the lifting section, the oxygen carrier circulates in the furnace and assists in combustion, and in the operation process, a small amount of oxygen carrier needs to be supplemented from the upper lifting section of the hearth due to the abrasion of the oxygen carrier;
(5) The flue gas at the outlet of the separator is discharged after passing through the heating surface, the denitration system, the dust removal system and the desulfurization system;
(6) The slag is discharged from a slag discharge port of the fluidized bed device.
The reaction pressure of the fluidized bed device is normal pressure, the fluidizing medium is air, the lower part is a bubbling fluidized bed, the upper lifting section is a rapid circulating fluidized bed, bed materials in the dense-phase region are fuel ash and inert particles, and particles in a circulating loop formed by the upper lifting section and the separator are oxygen carriers.
The combustible solid waste comprises coal gangue, agriculture and forestry solid waste, household garbage, sludge, waste textiles, waste leather products, waste wood products, cloth, sludge, household garbage, vinasse, waste paper, waste rubber products, waste plastic products, waste composite packages, plant residues, animal residues, livestock manure, grain and food processing waste, traditional Chinese medicine residues and a mixture of any two or more substances;
the oxygen carrier comprises a metal-based oxygen carrier, a non-metal-based oxygen carrier or a composite oxygen carrier, wherein the metal-based oxygen carrier comprises iron-based, manganese-based, nickel-based, copper-based and cobalt-based oxygen carriers, and ores and waste residues containing iron, manganese, nickel, copper and cobalt oxides; the non-metal-based oxygen carrier comprises CaSO 4 Or BaSO 4 (ii) a The compound type base oxygen carrier comprises a synthetic oxygen carrier containing any two or more than two metal oxides of iron, manganese, nickel, copper and cobalt;
the denitration process comprises a selective non-catalytic reduction process, a selective catalytic reduction process and a combined process thereof or a plasma denitration technology, an ozone oxidation denitration technology and a solid polymer denitration technology; the desulfurization process comprises a wet method, dry method or semi-dry method flue gas desulfurization process; the dust removal system comprises gravity settling dust removal, cyclone dust removal, an electrostatic dust collector, a bag-type dust collector and combination thereof;
the reaction pressure of the fluidized bed device is normal pressure, and the fluidizing medium is air.
Claims (4)
1. The utility model provides an oxygen carrier auxiliary combustible solid useless fluidized bed burner, its includes the fluidized bed device, the fluidized bed device is connected solid useless feeder, the fluidized bed device top is connected the smoke inlet of separator, the outlet flue is connected to the smoke outlet of separator, its characterized in that, the lower part of fluidized bed device is the rapid cycle fluidized bed that the swell fluidized bed, upper portion promote the section and be the binding off structure, the oxygen carrier feeder is connected to the upper portion of fluidized bed device promotion section of upper portion of fluidized bed device, the material returning mouth of separator is connected the upper portion of fluidized bed device promotes the section, the bottom plenum of fluidized bed device and the secondary wind gap of seting up in the upper portion of fluidized bed device promote the section all connect the forced draught blower, be provided with heating surface, deNOx systems, dust pelletizing system, desulfurization system in the outlet flue.
2. The fluidized bed combustion device for auxiliary combustion of oxygen carrier for solid waste of claim 1, wherein the solid waste feeding device is connected with the solid waste bin, and the oxygen carrier feeding device is connected with the oxygen carrier bin.
3. The fluidized bed combustion device for auxiliary combustion of oxygen carrier in solid waste as claimed in claim 1, wherein the separator comprises cyclone separator, impact separator and louver type separator.
4. The fluidized bed combustion device for auxiliary combustion of oxygen carrier in solid waste of claim 1, wherein the feeding device for solid waste comprises a screw feeder, a belt-conveying feeder, a scraper feeder, a star feeder and a vibrating feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222692370.9U CN218510872U (en) | 2022-10-13 | 2022-10-13 | Oxygen carrier auxiliary combustible solid waste fluidized bed combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222692370.9U CN218510872U (en) | 2022-10-13 | 2022-10-13 | Oxygen carrier auxiliary combustible solid waste fluidized bed combustion device |
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| Publication Number | Publication Date |
|---|---|
| CN218510872U true CN218510872U (en) | 2023-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222692370.9U Active CN218510872U (en) | 2022-10-13 | 2022-10-13 | Oxygen carrier auxiliary combustible solid waste fluidized bed combustion device |
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| CN (1) | CN218510872U (en) |
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2022
- 2022-10-13 CN CN202222692370.9U patent/CN218510872U/en active Active
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