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CN-224215320-U - Environment-friendly fluidized bed boiler

CN224215320UCN 224215320 UCN224215320 UCN 224215320UCN-224215320-U

Abstract

The application relates to the technical field of fluidized bed boilers, and discloses an environment-friendly fluidized bed boiler, which comprises a boiler body, a horizontal flue, a cyclone separator, a returning small air chamber and a denitration component. This environmental protection type fluidized bed boiler, can effectively reduce flue gas NOx's emission concentration through the denitration subassembly that sets up, the environmental protection effect of the device has been improved, the flue gas can react with first atomizer atomizing spun urea solution through horizontal flue conveying to cyclone's in-process, realize preliminary effect that reduces NOx concentration, then the flue gas can carry out preliminary separation through cyclone, the flue gas can carry secondary separation in carrying second grade separator through transfer pipe afterwards, can separate tiny granule, the flue gas can carry the afterbody flue through the passageway of discharging fume simultaneously, at this in-process, the flue gas can react with second atomizer spun urea solution earlier, then the flue gas can carry through a plurality of vanadium titanium series catalyst layers.

Inventors

  • SUN YUANLONG
  • WANG ZHONGLIE
  • SHAO HUIFANG

Assignees

  • 杭州航民小城热电有限公司

Dates

Publication Date
20260508
Application Date
20250430

Claims (8)

  1. 1. The environment-friendly fluidized bed boiler comprises a boiler body (1), a horizontal flue (2), a cyclone separator (3), a small return air chamber (4) and a denitration component (5), and is characterized in that the denitration component (5) comprises a reducing agent storage tank (501) and two liquid pumps (503) arranged at the top of the reducing agent storage tank (501), the output ends of the two liquid pumps (503) are respectively provided with a first infusion tube (504) and a second infusion tube (505), the pipe sections of the first infusion tube (504) and the second infusion tube (505) are respectively provided with a filter component (506), the output end of the first infusion tube (504) is communicated with a first atomizer (507), the output end of the second infusion tube (505) is provided with a second atomizer (511), the first atomizer (507) is embedded at the top of the horizontal flue (2), the output end of the first atomizer (507) is positioned in the interior of the horizontal flue (2), the top end of the cyclone separator (3) is communicated with a transfer tube (508), the output end of the second infusion tube (508) is communicated with a smoke exhaust channel (510), the output end of the second infusion tube (509) is provided with a second atomizer (509), the top of the second atomizer (509) is embedded at the top of the second flue (509), and the output end of the second atomization nozzle (511) is positioned in the smoke exhaust channel (510), and a plurality of vanadium-titanium catalyst layers (512) are fixedly connected to the inner wall of the smoke exhaust channel (510).
  2. 2. The environment-friendly fluidized bed boiler of claim 1, wherein the horizontal flue (2) is communicated with the top of the boiler body (1), and the output end of the horizontal flue (2) is communicated with the input end of the cyclone separator (3).
  3. 3. The environment-friendly fluidized bed boiler of claim 1, wherein the bottom end of the cyclone separator (3) is communicated with the top end of the small return air chamber (4), the bottom end of the secondary separator (509) is communicated with the top end of the small return air chamber (4), and the output end of the small return air chamber (4) is communicated with the inside of the boiler body (1).
  4. 4. The environment-friendly fluidized bed boiler of claim 1, wherein the top of the reducing agent storage tank (501) is provided with a liquid supplementing pipe (502), the outer surface of the reducing agent storage tank (501) is provided with a controller (513), and electric elements inside the denitration component (5) are electrically connected with the controller (513).
  5. 5. The environment-friendly fluidized bed boiler of claim 1, wherein the output end of the smoke exhaust channel (510) is communicated with a tail flue (6), and an economizer (7) and an air preheater (8) are arranged in the tail flue (6).
  6. 6. An environment-friendly fluidized bed boiler according to claim 5, wherein the output end of the tail flue (6) is provided with a wet electric dust collector (9).
  7. 7. The environment-friendly fluidized bed boiler according to claim 6, wherein the output end of the wet electric dust collector (9) is provided with a desulfurizing tower (10).
  8. 8. The environment-friendly fluidized bed boiler as set forth in claim 7, wherein an iron chimney (11) is installed at the output end of the desulfurizing tower (10).

Description

Environment-friendly fluidized bed boiler Technical Field The application relates to the technical field of fluidized bed boilers, in particular to an environment-friendly fluidized bed boiler. Background The circulating fluidized bed boiler is widely applied in the energy industry due to high combustion efficiency and low pollutant emission. However, with the improvement of environmental protection standards and the extension of running time, the condition that the NOx emission concentration is too high in the exhaust process of the flue gas of the existing boiler can increase the maintenance cost and the environmental pollution risk, and in order to reduce the NOx emission concentration of the flue gas, an environmental protection type fluidized bed boiler is proposed. Disclosure of utility model Aiming at the defects of the prior art, the application provides the environment-friendly fluidized bed boiler, and the SNCR denitration system and the SCR denitration catalyst are additionally arranged at the proper positions, so that the NOx emission concentration of the flue gas is effectively reduced, and the effect of more environmental protection is realized. In order to achieve the above purpose, the application provides the technical scheme that the environment-friendly fluidized bed boiler comprises a boiler body, a horizontal flue, a cyclone separator, a small return air chamber and a denitration component, wherein the denitration component comprises a reducing agent storage tank and two liquid pumps arranged at the top of the reducing agent storage tank, the output ends of the two liquid pumps are respectively provided with a first infusion tube and a second infusion tube, the pipe sections of the first infusion tube and the second infusion tube are respectively provided with a filtering component, the output end of the first infusion tube is communicated with a first atomizing spray head, the output end of the second infusion tube is provided with a second atomizing spray head, the first atomizing spray head is inlaid at the top of the horizontal flue, the output end of the first atomizing spray head is positioned in the horizontal flue, the top of the cyclone separator is communicated with a transfer tube, the output end of the transfer tube is provided with a second separator, the top of the second separator is communicated with a smoke discharging channel, the output end of the second atomizing spray head is inlaid at the top of the channel, the second spray head is positioned in the smoke discharging channel, and the inner wall of the smoke discharging channel is fixedly connected with a plurality of vanadium catalyst layers. Through above-mentioned scheme, can effectively reduce the emission concentration of flue gas NOx through the denitration subassembly that sets up, the environmental protection effect of the device has been improved, the flue gas can react with first atomizer atomized spun urea solution through horizontal flue in-process that carries cyclone, realize preliminary reduction NOx concentration's effect, then the flue gas can carry out preliminary separation through cyclone, the flue gas can carry secondary separation in the secondary separator through transfer pipe afterwards, can separate tiny granule, the flue gas can carry through the flue gas passageway of discharging fume simultaneously, in this process, the flue gas can react with second atomizer spun urea solution earlier, then the flue gas can carry through a plurality of vanadium titanium catalyst layers, in this process, urea is as the reductant, reduce NOx into nitrogen gas and water under the catalyst effect has improved denitration efficiency, through progressively carrying out denitration treatment to the flue gas, the denitration quality of having realized more high-efficient, the emission concentration of flue gas NOx has been reduced, environmental protection more. Further, the horizontal flue is communicated with the top of the furnace body, and the output end of the horizontal flue is communicated with the input end of the cyclone separator. Through the scheme, the relation among the furnace body, the horizontal flue and the cyclone separator is limited, and flue gas generated by combustion in the furnace body can be conveyed to the cyclone separator for treatment through the horizontal flue, so that coarse particles can be separated, and subsequent repeated combustion work is facilitated. Further, the bottom end of the cyclone separator is communicated with the top end of the small returning air chamber, the bottom end of the secondary separator is communicated with the top end of the small returning air chamber, and the output end of the small returning air chamber is communicated with the inside of the furnace body. Through the scheme, coarse particles separated by the cyclone separator and fine particles separated by the secondary separator can be conveyed into the small returning air chamber, and then the