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CN-224207760-U - System for fly ash desorption SO2 and HCl

CN224207760UCN 224207760 UCN224207760 UCN 224207760UCN-224207760-U

Abstract

The utility model discloses a system for removing SO2 and HCl from fly ash, which comprises a flue gas pipeline, an absorption tower and a dust remover, wherein the output end of the flue gas pipeline is communicated with a pretreatment tower, the top of the pretreatment tower is communicated with the absorption tower through a conveying pipeline, the fly ash output by the bottom ash of the absorption tower and the dust remover is sent into a sedimentation tank through the fly ash pipeline, the bottom of the sedimentation tank is communicated with solid-liquid separation equipment, and solid fly ash separated by the solid-liquid separation equipment enters a mixing tank. According to the system for removing SO2 and HCl from the fly ash, the fly ash at the bottom of the semi-dry deacidification tower is recycled, the pretreatment tower is additionally arranged, the residual at the bottom of the absorption tower is subjected to water washing treatment, the content of available substances is improved, the residual substances are sent to the pretreatment tower to be used as primary deacidification, the fly ash at the bottom of the prior art can be recycled through the two-stage deacidification, the deacidification effect can be improved, and the use amount of adsorbents such as slaked lime, activated carbon and the like is saved.

Inventors

  • LIU ZHIWEI
  • REN XIAOCHEN
  • SONG JIANDONG
  • LI KEFU

Assignees

  • 中卫市绿能新能源有限公司

Dates

Publication Date
20260508
Application Date
20250522

Claims (6)

  1. 1. The system for removing SO2 and HCl from fly ash comprises a flue gas pipeline (1), an absorption tower (4) and a dust remover (23), and is characterized in that the output end of the flue gas pipeline (1) is communicated with a pretreatment tower (2), the top of the pretreatment tower (2) is communicated with the absorption tower (4) through a conveying pipeline (3), fly ash output by bottom ash of the absorption tower (4) and the dust remover (23) is sent into a sedimentation tank (20) through a fly ash pipeline (22), the bottom of the sedimentation tank (20) is communicated with a solid-liquid separation device (19), solid fly ash separated by the solid-liquid separation device (19) enters a mixing tank (17), the solid fly ash is mixed with water and then is sent to the top of the pretreatment tower (2) through a liquid pump (16), the top of the pretreatment tower (2) is provided with a top tank a (5) and a rotary atomizer a (6), the liquid pump (16) sends the mixture to the top tank a (5) from the rotary atomizer a (6) to the inside of the pretreatment tower (2), and the bottom of the pretreatment tower (2) is provided with an output pipeline (12).
  2. 2. The system for fly ash removal of SO2 and HCl according to claim 1, characterized in that the absorber tower (4) is formulated with an absorbent formulation system; The absorbent preparation system comprises a storage tank (13), a fusion tank (14), a water pipe (15), a medicament pipeline (7), a tower top tank b (8) and a rotary atomizer b (9), wherein the fusion tank (14) is connected with the storage tank (13) and the water pipe (15), the tower top of the absorption tower (4) is provided with the tower top tank b (8) and the rotary atomizer b (9), the fusion tank (14) is connected with the tower top tank b (8) through the medicament pipeline (7), and the absorbent is distributed into the absorption tower (4) from the rotary atomizer b (9) through the tower top tank b (8).
  3. 3. The system for removing SO2 and HCl from fly ash according to claim 1, wherein the top of the absorption tower (4) is communicated with a dust remover (23) through a dust removing pipeline (10), and the dust remover (23) is connected with a tail gas pipeline (18).
  4. 4. The system for removing SO2 and HCl from fly ash according to claim 1, wherein the liquid pump (16) is communicated with the tower top tank a (5) through a recovery pipeline (11), and the bottom fly ash is separated through a solid-liquid separation device (19) and then is proportioned with water again in a mixing tank (17), and is sent to the pretreatment tower (2) through the liquid pump (16).
  5. 5. The system for removing SO2 and HCl from fly ash according to claim 1, wherein the sedimentation tank (20) is provided with a drainage pipeline (21), the fly ash at the bottom and accumulated water are sent into the sedimentation tank (20) through a fly ash pipeline (22), and the drainage pipeline (21) is used for pumping out water in the sedimentation tank (20) after sedimentation.
  6. 6. The system for fly ash removal of SO2 and HCl of claim 5, characterized in that the settling tank (20) is configured with a water wash line.

Description

System for fly ash desorption SO2 and HCl Technical Field The utility model relates to the technical field of garbage incineration treatment, in particular to a system for removing SO2 and HCl from garbage incineration fly ash. Background The dry deacidification process is a pollution control technology for removing acidic substances in waste gas by chemical reaction or physical adsorption of solid adsorbent and acidic pollutants (such as HCl, SO2, HF and the like), and has the characteristics of simple flow, no wastewater generation, low equipment investment and operation cost and the like, and is widely applied to the fields of waste incineration, steel smelting, chemical waste gas treatment and the like. At present, the fly ash is modified by using a fly ash modification mode mostly, and the mechanical force modification of the fly ash is to change the physical structure, chemical activity or surface property of the fly ash through the action of mechanical force (such as grinding, stirring, impact and the like) so as to improve the application performance of the fly ash in the fields of building materials, environmental protection, chemical industry and the like. Disclosure of utility model The utility model aims to provide a system for removing SO2 and HCl from fly ash, which solves the problems in the prior art. In order to achieve the above purpose, the present utility model provides the following technical solutions: The system for removing SO2 and HCl from fly ash comprises a flue gas pipeline, an absorption tower and a dust remover, wherein the output end of the flue gas pipeline is communicated with a pretreatment tower, the top of the pretreatment tower is communicated with the absorption tower through a conveying pipeline, fly ash output by the bottom ash of the absorption tower and the dust remover is sent into a sedimentation tank through a fly ash pipeline, the bottom of the sedimentation tank is communicated with solid-liquid separation equipment, the solid fly ash separated by the solid-liquid separation equipment enters a mixing tank and is pumped to the top of the pretreatment tower through a liquid pump after being mixed with water, the top of the pretreatment tower is provided with a top tank a and a rotary atomizer a, the liquid pump sends a mixture to the inside of the pretreatment tower from the rotary atomizer a, and the bottom of the pretreatment tower is provided with an output pipeline. As a still further aspect of the present utility model, the absorber is configured with an absorbent formulation system; The absorbent preparation system comprises a storage tank, a fusion tank, a water delivery pipe, a medicament pipeline, a tower top tank b and a rotary atomizer b, wherein the fusion tank is connected with the storage tank and the water delivery pipe, the tower top of the absorption tower is provided with the tower top tank b and the rotary atomizer b, the fusion tank is connected with the tower top tank b through the medicament pipeline, and the absorbent is distributed into the absorption tower from the rotary atomizer b through the tower top tank b. As a still further scheme of the utility model, the top of the absorption tower is communicated with a dust remover through a dust removing pipeline, and the dust remover is connected with a tail gas pipeline. As a still further scheme of the utility model, the liquid pump is communicated with the tower top tank a through a recovery pipeline, the fly ash at the bottom of the tower is separated through solid-liquid separation equipment and then is proportioned with water again in a mixing tank, and the fly ash is pumped to a pretreatment tower through a liquid pump. As a still further scheme of the utility model, the sedimentation tank is provided with a drainage pipeline, the fly ash at the bottom and accumulated water are sent into the sedimentation tank through the fly ash pipeline, and the drainage pipeline is used for pumping out the water in the sedimentation tank after sedimentation. As a still further scheme of the utility model, the sedimentation tank is provided with a water washing pipeline. Compared with the prior art, the utility model has the beneficial effects that: According to the system for removing SO2 and HCl from the fly ash, the fly ash at the bottom of the semi-dry deacidification tower is recycled, the pretreatment tower is additionally arranged, the residual at the bottom of the absorption tower is subjected to water washing treatment, the content of available substances is improved, the residual substances are sent to the pretreatment tower to be used as primary deacidification, the fly ash at the bottom of the prior art can be recycled through the two-stage deacidification, the deacidification effect can be improved, and the use amount of adsorbents such as slaked lime, activated carbon and the like is saved. Drawings FIG. 1 is a schematic diagram of a system for fly ash removal of SO2 and HCl. In the fig