CN216677739U

CN216677739U - Complex flue gas pollutant treatment system

Info

Publication number: CN216677739U
Application number: CN202220243050.2U
Authority: CN
Inventors: 郭勇; 牛汝禹
Original assignee: Shandong Jinshuncheng Environmental Protection Technology Co ltd
Current assignee: Shandong Jinshuncheng Environmental Protection Technology Co ltd
Priority date: 2022-01-29
Filing date: 2022-01-29
Publication date: 2022-06-07
Anticipated expiration: 2032-01-29

Abstract

The utility model belongs to the technical field of treatment of complex pollutants in flue gas and tail gas, and particularly relates to a complex flue gas pollutant treatment system which comprises a tail gas pipeline and a regenerative furnace, wherein a first regenerative chamber, a second regenerative chamber and a third regenerative chamber are sequentially arranged in the regenerative furnace, a burner is arranged on the regenerative furnace, the tail gas pipeline is respectively connected with the first regenerative chamber, the second regenerative chamber and the third regenerative chamber through a flue heat exchanger, the outlets of the upper part of the regenerative furnace, the first regenerative chamber, the second regenerative chamber and the third regenerative chamber are respectively connected with a denitration reactor, the denitration reactor is connected with an ammonia gas storage tank, the gas outlet of the denitration reactor is connected with an induced draft fan through the flue heat exchanger, and the induced draft fan is respectively connected with a chimney, the first regenerative chamber, the second regenerative chamber and the third regenerative chamber. The utility model provides heat by utilizing the carbon monoxide in the flue gas, and the heat generated by the combustion of the carbon monoxide is supplied to the denitration system, so that the comprehensive treatment of nitrogen oxides, carbon monoxide and ammonia in the flue gas of the industries such as soda ash and the like can be effectively solved.

Description

Complex flue gas pollutant treatment system

Technical Field

The utility model belongs to the technical field of treatment of complex pollutants in flue gas tail gas, and particularly relates to a complex flue gas pollutant treatment system.

Background

With the increasing improvement of the quality of life of national people in China, the demand of people on substances is higher and higher, the demand on energy, chemical industry and industrial products is larger and larger, the industrial production causes increasingly serious environmental pollution, in environmental pollutants, the emission of nitric oxide causes acid rain, photochemical smog and the like, and in special industries, the emission of other substances is accompanied, and the environment is also damaged.

At present, the method for preparing the calcined soda in the calcined soda industry is generally an ammonia-soda process, 20000ppm of carbon monoxide is discharged in the process of preparing the calcined soda by the ammonia-soda process, and 300mg/Nm³The emission of nitrogen oxides and the emission of partial ammonia bring great pollution to the environment, the flue gas temperature is lower due to the fact that soda ash is washed by a multi-stage tower, the existing flue gas treatment technology mainly heats the flue gas temperature to 200 ℃, the nitrogen oxides are removed through a selective catalyst reduction technology, but the method needs to be heated, consumes a large amount of energy, and is easy to cause catalyst poisoning at the temperature.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the defects of the prior art are overcome, the complex flue gas pollutant treatment system is provided, and comprehensive treatment of nitrogen oxides, carbon monoxide and ammonia in flue gas of industries such as soda ash and the like can be effectively achieved.

The utility model is realized by adopting the following technical scheme:

complicated flue gas pollutant treatment system, including tail gas pipeline and regenerator, be equipped with regenerator, regenerator and regenerator No. two in the regenerator in proper order, be equipped with the combustor on the regenerator, the tail gas pipeline is connected with regenerator, regenerator and regenerator No. two respectively through flue heat exchanger, and the upper portion of regenerator, the export of regenerator and regenerator No. two all are connected with denitration reactor, and denitration reactor is connected with the ammonia storage tank, and denitration reactor's gas outlet is connected with the draught fan through flue heat exchanger, and the draught fan is connected with chimney, regenerator and regenerator No. two and regenerator respectively.

Preferably, the bottom of the first heat storage chamber is provided with a first back-blowing valve, a first inlet valve and a first outlet valve, the bottom of the second heat storage chamber is provided with a second back-blowing valve, a second inlet valve and a second outlet valve, and the bottom of the third heat storage chamber is provided with a third back-blowing valve, a third inlet valve and a third outlet valve.

Preferably, the upper part of the regenerative furnace is connected with the denitration reactor through a waste heat boiler and a waste heat valve.

Preferably, the upper part of the regenerative furnace is connected with the chimney through a direct vent valve.

Preferably, the ammonia gas storage tank is connected with the denitration reactor through an ammonia supply system.

Preferably, the induced draft fan is connected with regenerator No. one, regenerator No. two and regenerator No. three respectively through total blowback valve and booster compressor.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model provides heat by utilizing the carbon monoxide in the flue gas, and the heat generated by the combustion of the carbon monoxide is supplied to the denitration system, so that the comprehensive treatment of nitrogen oxides, carbon monoxide and ammonia in the flue gas of the industries such as soda ash and the like can be effectively solved, and the utility model can also be applied to the flue gas of the industries such as steel sintering machines, lime and the like which generate carbon monoxide.

2. The utility model solves the problems of catalyst poisoning and energy waste, is beneficial to recovering partial energy on the premise of solving the environmental protection problem for enterprises, and reduces the operation cost of the enterprises.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure: 1. an exhaust gas pipeline; 2. a flue heat exchanger; 3. a denitration reactor; 4. a first blowback valve; 5. an inlet valve number one; 6. an outlet valve number one; 7. a second blowback valve; 8. a second inlet valve; 9. an outlet valve number two; 10. a third blowback valve; 11. a third inlet valve; 12. an outlet valve number three; 13. a regenerative furnace; 131. a regenerator chamber I; 132. a second regenerator; 133. a regenerator chamber III; 14. a burner; 15. a waste heat boiler; 16. a direct discharge valve; 17. a waste heat valve; 18. a supercharger; 19. a main blowback valve; 20. an ammonia supply system; 21. an ammonia gas storage tank; 22. an induced draft fan; 23. and (4) a chimney.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1, the complex flue gas pollutant treating system comprises a tail gas pipeline 1 and a regenerator 13, wherein a first regenerator 131, a second regenerator 132 and a third regenerator 133 are sequentially arranged in the regenerator 13, a first blowback valve 4, a first inlet valve 5 and a first outlet valve 6 are arranged at the bottom of the first regenerator 131, a second blowback valve 7, a second inlet valve 8 and a second outlet valve 9 are arranged at the bottom of the second regenerator 132, and a third blowback valve 10, a third inlet valve 11 and a third outlet valve 12 are arranged at the bottom of the third regenerator 133;

a combustor 14 is arranged on the regenerator 13, the tail gas pipeline 1 is respectively connected with inlet valves of the first regenerator 131, the second regenerator 132 and the third regenerator 133 through a flue heat exchanger 2, outlet valves of the first regenerator 131, the second regenerator 132 and the third regenerator 133 are respectively connected with the denitration reactor 3, the upper part of the regenerator 13 is connected with the denitration reactor 3 through a waste heat boiler 15 and a waste heat valve 17, the denitration reactor 3 is connected with an ammonia storage tank 21 through an ammonia supply system 20, an air outlet of the denitration reactor 3 is connected with an induced draft fan 22 through the flue heat exchanger 2, the induced draft fan 22 is connected with a chimney 23, and the induced draft fan 22 is respectively connected with back-blowing valves of the first regenerator 131, the second regenerator 132 and the third regenerator 133 through a total back-blowing valve 19 and a booster 18; the upper part of the regenerative furnace 13 is connected to a chimney 23 via a direct-discharge valve 16.

During operation, afterbody flue gas (usually about 50 ℃), through tail gas pipeline 1, through the heating of flue heat exchanger 2, promotes the temperature to get into regenerator 13 through the inlet valve after 150 ℃ of left and right sides, regenerator 13 burns burning furnace for 3 rooms, and the switch of pass valve can guarantee constantly that the flue gas gets into regenerator 13 and the flue gas after will purifying has the outlet valve to discharge, and specific switch is as shown in the following table:

the outlet temperature is 200 ℃, the flue gas after outlet and the flue gas after passing through the waste heat boiler 15 are mixed, the mixed flue gas enters the SCR denitration reactor 3, the flue gas is purified, ammonia gas in the flue gas is absent and is supplied by an ammonia gas storage tank 21 through an ammonia supply system 20, the tail gas is induced into a chimney 23 by an induced draft fan 22 finally, partial heat energy of carbon monoxide in the combustion process is utilized by the waste heat boiler 15, meanwhile, the system is provided with a direct exhaust valve 16 direct exhaust system, the safety of the whole system can be ensured, during starting, the temperature in the furnace is combusted by a combustor 14 to combust natural gas, the temperature in the heating furnace reaches 750 ℃, and the ignition temperature of the carbon monoxide is met. And the subsequent combustion heat of carbon monoxide in the tail gas can be utilized to meet the requirement of automatic operation of the system.

Of course, the foregoing is only a preferred embodiment of the utility model and should not be taken as limiting the scope of the embodiments of the utility model. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.

Claims

1. The utility model provides a complicated flue gas pollutant treatment system which characterized in that: comprises a tail gas pipeline (1) and a regenerative furnace (13), wherein a first regenerative chamber (131), a second regenerative chamber (132) and a third regenerative chamber (133) are sequentially arranged in the regenerative furnace (13), a burner (14) is arranged on the regenerative furnace (13), tail gas pipeline (1) through flue heat exchanger (2) respectively with regenerator (131), regenerator (132) and No. three regenerators (133) are connected, the upper portion of regenerator (13), regenerator (131), the export of regenerator (132) and No. three regenerators (133) all is connected with denitration reactor (3), denitration reactor (3) are connected with ammonia storage tank (21), the gas outlet of denitration reactor (3) is connected with draught fan (22) through flue heat exchanger (2), draught fan (22) respectively with chimney (23), regenerator (131), regenerator (132) and No. three regenerators (133) are connected.

2. The complex flue gas pollutant remediation system of claim 1, wherein: the bottom of the first heat storage chamber (131) is provided with a first blowback valve (4), a first inlet valve (5) and a first outlet valve (6), the bottom of the second heat storage chamber (132) is provided with a second blowback valve (7), a second inlet valve (8) and a second outlet valve (9), and the bottom of the third heat storage chamber (133) is provided with a third blowback valve (10), a third inlet valve (11) and a third outlet valve (12).

3. The complex flue gas pollutant remediation system of claim 1, wherein: the upper part of the regenerative furnace (13) is connected with the denitration reactor (3) through a waste heat boiler (15) and a waste heat valve (17).

4. The complex flue gas pollutant remediation system of claim 1, wherein: the upper part of the regenerative furnace (13) is connected with a chimney (23) through a direct-discharge valve (16).

5. The complex flue gas pollutant remediation system of claim 1, wherein: the ammonia gas storage tank (21) is connected with the denitration reactor (3) through an ammonia supply system (20).

6. The complex flue gas pollutant remediation system of claim 1, wherein: the induced draft fan (22) is respectively connected with the first heat storage chamber (131), the second heat storage chamber (132) and the third heat storage chamber (133) through a main back-blowing valve (19) and a supercharger (18).