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CN-224230019-U - Yellow phosphorus tail gas incineration special boiler capable of reducing oxygen content of flue gas

CN224230019UCN 224230019 UCN224230019 UCN 224230019UCN-224230019-U

Abstract

The utility model relates to the technical field of boilers, in particular to a boiler special for burning yellow phosphorus tail gas and capable of reducing oxygen content of flue gas, which comprises a yellow phosphorus tail gas storage tank, a desulfurizing and dephosphorizing agent storage bin and a hearth, wherein a primary air chamber is arranged at the bottom end of the hearth, a bed ignition and flue gas yellow phosphorus tail gas burner is arranged on the side wall of the primary air chamber, the yellow phosphorus tail gas storage tank is communicated with the bed ignition and flue gas yellow phosphorus tail gas burner through a pipeline, a desulfurizing and dephosphorizing agent conveyor is arranged at the bottom end of the desulfurizing and dephosphorizing agent storage bin, the desulfurizing and dephosphorizing agent conveyor is communicated with the bottom end of the hearth through a pipeline, two yellow phosphorus tail gas burners are fixedly arranged at two sides of the hearth, a secondary air box communicated with the inside of the side wall of the hearth is also arranged at the side wall of the hearth, a separator is fixedly arranged at the outer side of the top end of the hearth, and a material return device communicated with the bottom end of the hearth is arranged at the bottom of the separator.

Inventors

  • SHI YUANLIANG
  • LI ZHAOQIAN
  • LI FUJIN

Assignees

  • 河北清新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20250528

Claims (7)

  1. 1. The utility model provides a reduce yellow phosphorus tail gas burns special boiler of flue gas oxygen content, includes yellow phosphorus tail gas storage tank (1), desulfurization dephosphorization agent warehouse (3) and furnace (9), a serial communication port, plenum (7) are installed to the bottom of furnace (9), and ignition under the bed and flue gas yellow phosphorus tail gas combustor (8) are installed to the lateral wall of plenum (7) once, and yellow phosphorus tail gas storage tank (1) is through pipeline and ignition under the bed and flue gas yellow phosphorus tail gas combustor (8) intercommunication, desulfurization dephosphorization agent conveyer (5) are installed to the bottom of desulfurization dephosphorization agent warehouse (3), and desulfurization dephosphorization agent conveyer (5) are through pipeline and furnace (9) bottom intercommunication, two yellow phosphorus tail gas combustor (6) are all fixedly installed to both sides of furnace (9), and secondary air box (4) rather than inside intercommunication are still installed to the lateral wall at furnace (9), separator (10) are installed in the outside fixed mounting at the top of furnace (9), and feed back ware (11) with furnace (9) bottom intercommunication are installed at the bottom of separator (10), the top of separator (10) is installed and is connected with flue gas treatment chamber.
  2. 2. The boiler special for yellow phosphorus tail gas incineration for reducing the oxygen content of flue gas according to claim 1, wherein the bottom end of the flue gas treatment chamber is connected with a dust remover (20) through a pipeline, one side of the dust remover (20) is connected with a desulfurizing tower (22) through a pipeline, the desulfurizing tower (22) is connected with a chimney (21) through a pipeline, and a draught fan (19) is arranged on the pipeline between the dust remover (20) and the desulfurizing tower (22).
  3. 3. The boiler special for burning yellow phosphorus tail gas and reducing oxygen content of flue gas according to claim 2, wherein an air outlet of the induced draft fan (19) is connected with a flue gas recirculation fan (18) through a pipeline, the flue gas recirculation fan (18) is connected with a branch pipeline, one end of the branch pipeline is communicated with the secondary air box (4), the other end of the branch pipeline is connected with a primary air fan (16), and an air outlet of the primary air fan (16) is communicated with a under-bed ignition and flue gas yellow phosphorus tail gas burner (8) through a pipeline.
  4. 4. The boiler special for burning yellow phosphorus tail gas and reducing oxygen content of flue gas according to claim 1, wherein the secondary air box (4) is connected with a secondary air fan (17) through a pipeline, and a yellow phosphorus tail gas conveying fan (2) is arranged between the yellow phosphorus tail gas storage tank (1) and a pipeline of an under-bed ignition and flue gas yellow phosphorus tail gas burner (8).
  5. 5. The boiler special for yellow phosphorus tail gas incineration for reducing oxygen content of flue gas according to claim 1, wherein a superheater (12), an economizer (13) and an SCR denitration agent (15) are sequentially arranged in the flue gas treatment chamber from top to bottom, and the economizer (13) is provided with two groups and is respectively arranged above and below the SCR denitration agent (15).
  6. 6. The boiler special for burning yellow phosphorus tail gas and reducing oxygen content of flue gas according to claim 1, wherein a plurality of SNCR nozzles (14) communicated with the inside of the hearth (9) are fixedly arranged on the side wall of the hearth.
  7. 7. The special boiler for yellow phosphorus tail gas incineration with reduced oxygen content of flue gas according to claim 5, wherein the flue gas treatment chamber comprises a pipe body (231), a sealing cover (232) and a sealing plate (233), a material taking port is formed in the side wall of the pipe body (231), a reversible sealing cover (232) is hinged between the material taking ports through a hinge, the sealing plate (233) is fixedly mounted at the edge of the outer wall of the sealing cover (232), the inner wall of the sealing plate (233) is attached to the outer wall of the pipe body (231), a fixing ring (235) flush with the bottom end of the material taking port is fixedly mounted in the pipe body (231), a material placing seat (234) is arranged on the fixing ring (235), a through hole penetrating under a mountain is formed in the material placing seat (234), a rice-shaped supporting frame is fixedly mounted at the bottom of the through hole, and one end, far away from the hinge, of the sealing plate (233) is connected with the outer wall of the pipe body (231) through a bolt.

Description

Yellow phosphorus tail gas incineration special boiler capable of reducing oxygen content of flue gas Technical Field The utility model relates to the technical field of boilers, in particular to a boiler special for burning yellow phosphorus tail gas and reducing oxygen content of flue gas. Background Yellow phosphorus tail gas which is a byproduct generated in the yellow phosphorus production process of yellow phosphorus production enterprises has complex components and contains various highly toxic substances, and has serious harm to the environment and human health, and the yellow phosphorus tail gas is divided into two types of purification and primary purification, because the purification cost of the yellow phosphorus tail gas is higher, the yellow phosphorus tail gas of many enterprises only has primary purification, and the primary purified yellow phosphorus tail gas contains a large amount of phosphorus and impurities, so that serious blockage and corrosion can be caused to utilization equipment of the yellow phosphorus tail gas, and because P generates P2O5 after combustion, the P2O5 generates H3PO4 and H3PO4 after combination with water, the service life is very short, generally not more than 3 months, and the utilization of the yellow phosphorus tail gas is seriously influenced, so that a plurality of enterprises directly ignite and discharge the yellow phosphorus tail gas in a manner of diffusing torch, and serious pollution is caused to the atmosphere, and meanwhile, the special boiler for burning the yellow phosphorus tail gas for reducing the oxygen content of flue gas is provided by the application. Disclosure of utility model Aiming at the defects of the prior art, the utility model aims to provide the special boiler for burning yellow phosphorus tail gas, which reduces the oxygen content of flue gas, so as to solve the problems that the special boiler for burning yellow phosphorus tail gas in the prior art causes serious corrosion to equipment due to phosphorus in the yellow phosphorus tail gas, and energy waste and environmental pollution are caused by low utilization rate of a common ignition mode of the yellow phosphorus tail gas. The utility model is realized by the following technical scheme that the device comprises a yellow phosphorus tail gas storage tank, a desulfurizing and dephosphorizing agent storage bin and a hearth, wherein a primary air chamber is arranged at the bottom end of the hearth, a bed ignition and flue gas yellow phosphorus tail gas burner is arranged on the side wall of the primary air chamber, the yellow phosphorus tail gas storage tank is communicated with the bed ignition and flue gas yellow phosphorus tail gas burner through a pipeline, a desulfurizing and dephosphorizing agent conveyor is arranged at the bottom end of the desulfurizing and dephosphorizing agent storage bin, the desulfurizing and dephosphorizing agent conveyor is communicated with the bottom end of the hearth through a pipeline, two yellow phosphorus tail gas burners are fixedly arranged on two sides of the hearth, a secondary air box communicated with the inside of the side wall of the hearth is also arranged on the side wall of the hearth, a separator is fixedly arranged on the outer side of the top end of the hearth, a material returning device communicated with the bottom end of the hearth is arranged at the bottom of the separator, and a flue gas treatment chamber communicated with the top of the separator is arranged. Optionally, the bottom of the flue gas treatment chamber is connected with a dust remover through a pipeline, one side of the dust remover is connected with a desulfurizing tower through a pipeline, the desulfurizing tower is connected with a chimney through a pipeline, and a draught fan is arranged on the pipeline between the dust remover and the desulfurizing tower. Optionally, the air outlet department of draught fan is connected with the flue gas recirculation fan through the pipeline, is connected with the pipeline of branching at the flue gas recirculation fan, and the one end and the overgrate air case intercommunication of pipeline of branching are connected with primary air fan, and primary air fan's air outlet passes through the pipeline and ignites and flue gas yellow phosphorus tail gas combustor intercommunication under the bed. Optionally, the secondary air box is connected with a secondary air blower through a pipeline, and a yellow phosphorus tail gas conveying fan is arranged between the yellow phosphorus tail gas storage tank and a pipeline of the under-bed ignition and flue gas yellow phosphorus tail gas burner. Optionally, the inside of the flue gas treatment chamber is provided with a superheater, an economizer and an SCR denitration agent from top to bottom in sequence, and the economizer is provided with two groups and is respectively arranged above and below the SCR denitration agent. Optionally, a plurality of SNCR nozzles communicated with the i