CN116196731A - Single-tower multi-cycle desulfurization and dust removal process - Google Patents

Single-tower multi-cycle desulfurization and dust removal process Download PDF

Info

Publication number
CN116196731A
CN116196731A CN202310114343.XA CN202310114343A CN116196731A CN 116196731 A CN116196731 A CN 116196731A CN 202310114343 A CN202310114343 A CN 202310114343A CN 116196731 A CN116196731 A CN 116196731A
Authority
CN
China
Prior art keywords
tower
water tank
spray
chimney
sprayer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310114343.XA
Other languages
Chinese (zh)
Inventor
冯芳秀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei Dixun Environmental Protection Technology Co ltd
Original Assignee
Hubei Dixun Environmental Protection Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hubei Dixun Environmental Protection Technology Co ltd filed Critical Hubei Dixun Environmental Protection Technology Co ltd
Priority to CN202310114343.XA priority Critical patent/CN116196731A/en
Publication of CN116196731A publication Critical patent/CN116196731A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B01D53/185—Liquid distributors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/14—Packed scrubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1406—Multiple stage absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1412—Controlling the absorption process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456—Removing acid components
    • B01D53/1481—Removing sulfur dioxide or sulfur trioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/08—Means for controlling the separation process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B01D2252/102—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Gas Separation By Absorption (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a single-tower multi-cycle desulfurization dust removal process, which comprises the following steps: s1: industrial waste gas enters the packing tower through the flue gas inlet, and desulfurization, dust removal and aerosol removal are carried out in the ascending process sequentially through the packing layer and the packing tower spraying circulation system; s2: the industrial waste gas continuously rises, enters the spray tower from the top of the packing tower through the gas distributing cap, and sequentially passes through a spray circulation system of the spray tower and a demister of the spray tower in the rising process to carry out aerosol removal, dust removal and ammonia escape reduction; s3: industrial waste gas continuously rises, enters the chimney through the flue, and is discharged from the top of the chimney after dust removal, aerosol removal, ammonia escape reduction and defogging are carried out through the chimney spray circulation system and the chimney defogger in the rising process. The desulfurization and dust removal process is simple to control, ammonia escape, aerosol substances, dust and the like in the tail gas can be reduced to the greatest extent, the purpose of ultralow emission is achieved, and the influence on the surrounding environment can be greatly reduced.

Description

Single-tower multi-cycle desulfurization and dust removal process
Technical Field
The invention relates to the technical field of industrial environmental protection, in particular to a single-tower multi-cycle desulfurization dust removal process.
Background
The ammonia desulfurization is a wet flue gas desulfurization process which takes amino substances as an absorbent to remove sulfur dioxide in flue gas and recover byproducts (such as ammonium sulfate and the like). The ammonia desulfurization is a high-efficiency low-energy-consumption wet desulfurization mode, the desulfurization process is gas-liquid phase reaction, the reaction rate is high, the utilization rate of the absorbent is high, and the desulfurization efficiency can be kept at 95-99%. The solubility of ammonia in water is over 20%. The ammonia process has rich raw materials. The ammonia process uses ammonia as raw material, and its forms may be liquid ammonia, aqueous ammonia and ammonium carbonate. However, although widely used in many places, the ammonia desulfurization is complex in process control, and ammonia in the tail gas escapes seriously, so that a long smoke zone is formed, and serious influence is easily brought to the surrounding environment.
Disclosure of Invention
In view of the above, the invention provides a single-tower multi-cycle desulfurization and dust removal process, which aims to solve the problems in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a single-tower multi-cycle desulfurization and dust removal process comprises the following steps:
s1: industrial waste gas enters the packing tower through the flue gas inlet, and desulfurization, dust removal and aerosol removal are carried out in the ascending process sequentially through the packing layer and the packing tower spraying circulation system;
s2: the industrial waste gas continuously rises, enters the spray tower from the top of the packed tower through the gas distributing cap, and sequentially passes through a spray circulation system of the spray tower and a demister of the spray tower in the rising process to carry out aerosol removal, dust removal and ammonia escape reduction;
s3: industrial waste gas continuously rises, enters the chimney through the flue, and is discharged from the top of the chimney after dust removal, aerosol removal, ammonia escape reduction and defogging are carried out through the chimney spray circulation system and the chimney defogger in the rising process.
Preferably, the packed tower spray circulation system comprises a packed tower circulation pump and a packed tower sprayer; the packed tower sprayer is arranged in the packed tower; the filler tower sprayer is positioned above the filler layer; the packed tower sprayer is communicated with the bottom of the packed tower through the packed tower circulating pump; in the S, the filler tower circulating pump conveys filler tower circulating liquid at the bottom of the filler tower to the filler tower sprayer, and the filler tower sprayer sprays the filler tower circulating liquid to contact with industrial waste gas, and then the filler tower circulating liquid falls back to the bottom of the filler tower.
Preferably, a packing tower overflow pipe is arranged in the packing tower; one end of the overflow pipe of the packed tower extends into the bottom of the packed tower, and the other end of the overflow pipe of the packed tower extends to the outside of the packed tower.
Preferably, a packing tower emptying pipe is arranged at the bottom of the packing tower; and a filler tower emptying valve is arranged on the filler tower emptying pipe.
Preferably, the spray tower spray circulation system comprises an annular water tank, a guide pipe, a spray tower circulating pump and a spray tower sprayer; the annular water tank is sleeved at the bottom of the outer side of the spray tower; the spray tower sprayer is arranged in the spray tower; the spray tower sprayer is positioned below the spray tower demister; the spray tower sprayer is communicated with the annular water tank through a spray tower circulating pump; one end of the flow guide pipe is communicated with the bottom of the spray tower, and the other end of the flow guide pipe is communicated with the annular water tank; in S, the spray tower circulating pump conveys the spray tower circulating liquid in the annular water tank to the spray tower sprayer, and after the spray tower sprayer sprays the spray tower circulating liquid to contact with industrial waste gas, the spray tower circulating liquid falls to the bottom of the spray tower and flows back into the annular water tank through the guide pipe.
Preferably, an annular water tank overflow pipe is arranged in the annular water tank; one end of the overflow pipe of the annular water tank extends into the bottom of the annular water tank, and the other end of the overflow pipe of the annular water tank penetrates through the annular water tank and is communicated with the packing tower.
Preferably, the bottom of the annular water tank is connected with an annular water tank emptying pipe; the other end of the annular water tank emptying pipe is communicated with the packed tower; an annular water tank emptying valve is arranged on the annular water tank emptying pipe.
Preferably, the chimney spray circulation system comprises a chimney circulation pump and a chimney sprayer; a process water tank is arranged at the bottom of the chimney; the chimney sprayer is arranged in the chimney; the chimney sprayer is communicated with the process water tank through the chimney circulating pump; in S, the chimney circulating pump conveys the process water in the process water tank to the chimney sprayer, and the process water is sprayed through the chimney sprayer and falls back into the process water tank.
Preferably, a process water tank overflow pipe is arranged in the process water tank; one end of the overflow pipe of the process water tank extends into the bottom of the process water tank, and the other end of the overflow pipe of the process water tank extends to the outside of the chimney.
Preferably, the bottom of the process water tank is provided with a process water tank emptying pipe; and a process water tank emptying valve is arranged on the process water tank emptying pipe.
Compared with the prior art, the invention has the following technical effects:
1) The desulfurization and dust removal process is simple to control, ammonia escape, aerosol substances, dust and the like in the tail gas can be reduced to the greatest extent, the purpose of ultralow emission is achieved, and the influence on the surrounding environment can be greatly reduced;
2) According to the invention, the annular water tank is arranged, so that the circulating liquid of the spray tower and the circulating liquid of the packed tower form a plurality of different circulating systems, each circulating system can correspond to different PH values, and meanwhile, the circulating water tank is arranged at the bottom of the spray tower, so that the lift of the circulating pump of the spray tower can be reduced;
3) According to the invention, the process water tank is arranged at the bottom of the chimney, and the tail gas is continuously washed by using the process water, so that the ammonia escape of the tail gas is further reduced;
4) According to the invention, each circulation system adopts overflow discharge, so that a discharge pump is omitted, and a control system is simplified.
Drawings
FIG. 1 is a flow chart of a single-tower multi-cycle desulfurization and dust removal process of the invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
in the figure: 1. a packed tower; 2. a filler layer; 3. an air distribution cap; 4. a spray tower; 5. a spray tower mist eliminator; 6. a flue; 7. a chimney; 8. a chimney demister; 9. a packed tower circulation pump; 10. a packed tower sprayer; 11. a filler tower overflow pipe; 12. a packed column evacuation valve; 13. an annular water tank; 14. a flow guiding pipe; 15. a spray tower circulation pump; 16. a spray tower sprayer; 17. an overflow pipe of the annular water tank; 18. an annular water tank emptying pipe; 19. an annular tank drain valve; 20. a chimney circulation pump; 21. a chimney sprayer; 22. a process water tank; 23. overflow pipe of process water tank; 24. a process water tank evacuation valve; 25. a flue gas inlet; 26. spray tower demister flushing pump; 27. a spray tower mist eliminator flusher; 28. a base tank; 29. an oxidation tank; 30. a collection pipe; 31. a process water inlet pipe; 32. a process water inlet valve; 33. alkali liquor tube.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1-2, the invention discloses a single-tower multi-cycle desulfurization and dust removal process, which comprises the following steps:
s1: industrial waste gas enters the packing tower 1 through the flue gas inlet 25, and sequentially passes through the packing layer 2 and the packing tower spray circulation system in the ascending process, and industrial waste gas can be desulfurized, dedusted and aerosol removed through the packing layer 2 and the packing tower circulating liquid;
s2: the industrial waste gas continuously rises, enters the spray tower 4 from the top of the packing tower 1 through the gas distributing cap 3, and sequentially passes through the spray tower spray circulation system and the spray tower demister 5 in the rising process to carry out aerosol removal, dust removal and ammonia escape reduction, so as to reduce ammonia escape, aerosol substances and dust in the tail gas; the gas separation cap is used for separating the circulating liquid of the spray tower from the circulating liquid of the packed tower;
s3: industrial waste gas continuously rises, enters the chimney 7 through the flue 6, and is discharged from the top of the chimney 7 after dust removal, aerosol removal, ammonia escape reduction and demisting are carried out in the rising process through the chimney spray circulation system and the chimney demister 8, so that ammonia escape, aerosol substances and dust in tail gas are further reduced.
The desulfurization and dust removal process is simple to control, ammonia escape, aerosol substances, dust and the like in the tail gas can be reduced to the greatest extent, the purpose of ultralow emission is achieved, and the influence on the surrounding environment can be greatly reduced.
In the present embodiment, the packed tower spray circulation system includes a packed tower circulation pump 9 and a packed tower sprayer 10; the packed tower sprayer 10 is arranged in the packed tower 1; the packed tower sprayer 10 is positioned above the packed layer 2; the packed tower sprayer 10 is communicated with the bottom of the packed tower 1 through a packed tower circulating pump 9; in S1, a filler tower circulating pump 9 conveys filler tower circulating liquid at the bottom of a filler tower 1 to a filler tower sprayer 10, the filler tower sprayer 10 sprays the filler tower circulating liquid to contact industrial waste gas, and after desulfurization, dust removal and aerosol removal are carried out on the industrial waste gas, the filler tower circulating liquid falls back to the bottom of the filler tower 1, so that the cyclic utilization of the filler tower circulating liquid is realized.
In this embodiment, the packed tower sprayer 10 includes a packed tower spray pipe and a packed tower nozzle; the packed tower spray pipe is arranged in the packed tower 1 and is communicated with a packed tower circulating pump 9; the filler tower nozzle is arranged at the bottom of the filler tower spray pipe and is used for spraying the filler tower circulating liquid downwards.
In the embodiment, a packed tower overflow pipe 11 is arranged inside the packed tower 1; one end of the overflow pipe 11 of the packed tower extends into the bottom of the packed tower 1, and the other end of the overflow pipe 11 of the packed tower extends to the outside of the packed tower 1, and mud deposited at the bottom of the packed tower is discharged first when overflow is discharged.
In the embodiment, a packed tower emptying pipe is arranged at the bottom of the packed tower 1; a filler tower emptying valve 12 is arranged on the filler tower emptying pipe; during maintenance, mud deposited at the bottom of the filler tower can be emptied through the filler tower emptying pipe and the filler tower emptying valve, and a sewage pump is not required to be arranged.
In this embodiment, the spray tower spray circulation system includes an annular water tank 13, a draft tube 14, a spray tower circulation pump 15, and a spray tower sprayer 16; the annular water tank 13 is sleeved at the bottom of the outer side of the spray tower 4; the spray tower sprayer 16 is arranged in the spray tower 4; the spray tower sprayer 16 is positioned below the spray tower demister 5; the spray tower sprayer 16 is communicated with the annular water tank 13 through a spray tower circulating pump 15; one end of the flow guide pipe 14 is communicated with the bottom of the spray tower 4, and the other end of the flow guide pipe 14 is communicated with the annular water tank 13; in S2, the spray tower circulating pump 15 conveys the spray tower circulating liquid in the annular water tank 13 to the spray tower sprayer 16, the spray tower sprayer 16 sprays the spray tower circulating liquid to contact with industrial waste gas, and after the industrial waste gas is subjected to dust removal, aerosol removal and ammonia escape reduction, the spray tower circulating liquid falls to the bottom of the spray tower 4 and flows back into the annular water tank 13 through the guide pipe 14, so that the cyclic utilization of the spray tower circulating liquid is realized.
In this embodiment, the spray tower sprayer 16 includes a spray tower spray pipe and a spray tower nozzle; the spray tower spray pipe is arranged in the spray tower 4 and is communicated with the spray tower circulating pump 15; the spray tower nozzle is arranged at the bottom of the spray pipe of the spray tower and is used for spraying circulating liquid to the downward spray tower.
In this embodiment, the number of spray tower spray pipes is two; the two spray pipes of the spray towers are arranged up and down; the bottom of each spray pipe of the spray tower is provided with a spray tower nozzle.
In the present embodiment, an annular tank overflow pipe 17 is provided inside the annular tank 13; one end of the annular water tank overflow pipe 17 extends into the bottom of the annular water tank 13, and the other end of the annular water tank overflow pipe 17 penetrates through the annular water tank 13 and is communicated with the packed tower 1; when the circulating liquid of the spray tower in the annular water tank 13 reaches a certain water level, the circulating liquid automatically overflows into the packed tower 1.
In the present embodiment, an annular tank emptying pipe 18 is connected to the bottom of the annular tank 13; the other end of the annular water tank emptying pipe 18 is communicated with the packed tower 1; an annular tank drain valve 19 is provided on the annular tank drain pipe 18.
In this embodiment, the spray tower 4 is disposed on top of the packed tower 1; the spray tower 4 is separated from the packed tower by an air separation cap 3; the air distributing cap 3 is arranged at the bottom of the spray tower 4; the outer diameter of the spray tower 4 is smaller than that of the packed tower 1; wherein, the packing tower 1 is not provided with a demister, and a lower gas speed is needed for ensuring gas-liquid contact time, and the spray tower 4 is provided with a spray tower demister 5, and a higher gas speed is needed, so that the outer diameter of the spray tower 4 is smaller than the outer diameter of the packing tower 1.
In this embodiment, the bottom of the spray tower 4 extends downwardly into the packed tower 1; an annular gap is formed between the outer wall of the lower part of the spray tower 4 and the inner wall of the upper part of the packed tower 1; the bottom of the annular gap is provided with an annular bottom plate; the annular water tank 13 is constituted by an annular space and an annular bottom plate.
In the embodiment, the bottom of the annular bottom plate is provided with a rib plate; the rib plates are fixedly connected to the inner wall of the packed tower 1 to play a supporting role.
In the present embodiment, the stack spray circulation system includes a stack circulation pump 20 and a stack spray 21; the bottom of the chimney 7 is provided with a process water tank 22; the chimney sprayer 21 is arranged inside the chimney 7; the chimney sprayer 21 is communicated with the process water tank 22 through the chimney circulating pump 20; in S2, the process water in the process water tank 22 is conveyed to the chimney sprayer 21 by the chimney circulation pump 20, and is sprayed by the chimney sprayer 21 and falls back into the process water tank 22, so that the process water is recycled, and in the process, the flue gas is further continuously washed by the process water, so that ammonia escape, aerosol substances, dust and the like in the tail gas are reduced, and the purpose of ultra-low emission is achieved.
In the present embodiment, the stack shower 21 includes a stack shower pipe and a stack nozzle; the chimney spray pipe is communicated with a chimney circulating pump 20; the chimney nozzle is arranged on the chimney spray pipe and is used for spraying the process water.
In the present embodiment, a process water tank overflow pipe 23 is provided inside the process water tank 22; one end of the overflow pipe 23 of the process water tank extends into the bottom of the process water tank 22, and the other end of the overflow pipe 23 of the process water tank extends to the outside of the chimney 7, and impurities at the bottom of the process water tank 22 are preferentially discharged during overflow.
In the present embodiment, a process tank emptying pipe is provided at the bottom of the process tank 22; a process tank drain valve 24 is provided on the process tank drain pipe.
In this embodiment, the inlet of process water tank 22 is controlled by process water inlet pipe 31 and process water inlet valve.
In this embodiment, the process water in the process water tank 22 is clean water.
In the embodiment, a spray tower sprayer flushing system is arranged in the spray tower 4, so that the spray tower sprayer flushing system can be used for flushing the spray tower sprayer and supplying water for the annular water tank; when in use, the water of the annular water tank is supplied by the spray tower sprayer flushing system, and is discharged outside by the overflow pipe of the process water tank during overflow, so that a water inlet system and an outside discharge system are not required to be independently arranged.
In this embodiment, the spray tower sprayer rinse system includes a spray tower sprayer rinse pump 26 and a spray tower sprayer rinse 27; a spray tower atomizer flusher 27 is provided inside the spray tower 4 and communicates with the process water tank 22 through a spray tower atomizer flushing pump 26.
In this embodiment, the spray tower atomizer flusher 27 includes a spray tower atomizer flush tube and a spray tower atomizer flush nozzle; the spray tower sprayer flushing pipe is arranged inside the spray tower 4 and is communicated with the spray tower sprayer flushing pump 26; the spray tower sprayer flushing nozzle is arranged on the spray tower sprayer flushing pipe.
In the present embodiment, the packed tower 1 is externally provided with a caustic tank 28 and an oxidation tank 29; the lye tank 28 is in communication with the packed column 1 via a lye tube 33. The oxidation tank 29 is communicated with the overflow pipe 11 of the packed tower through a collecting pipe 30; the emptying pipe of the packed tower is connected with the overflow pipe 11 of the packed tower; the process tank evacuation pipe communicates with the oxidation tank 29 via a collection pipe 30.
In this embodiment, the chimney mist eliminator 8 is a transverse plate electric mist eliminator; wherein the polar plate is one or a combination of a plurality of baffle plates, silk screens or porous plates.
In this embodiment, the circulating liquid of the packed tower in the packed tower circulates at a higher PH value to ensure a higher desulfurization efficiency.
In this embodiment, the lower PH circulation is used in the spray tower for the spray tower circulation to reduce the formation of aerosols from ammonia slip.
In this embodiment, the pH of the circulating liquid in the packed column is higher than the pH of the circulating liquid in the spray column.
In this example, the pH of the circulating liquid in the packed column is 5-8; the PH value of the circulating liquid of the spray tower is 3-6.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (10)

1. The single-tower multi-cycle desulfurization and dust removal process is characterized by comprising the following steps of:
s1: industrial waste gas enters the packing tower (1) through the flue gas inlet (25), and sequentially passes through the packing layer (2) and the packing tower spray circulation system in the ascending process to carry out desulfurization, dust removal and aerosol removal;
s2: the industrial waste gas continuously rises, enters the spray tower (4) from the top of the packing tower (1) through the gas separation cap (3), and sequentially passes through the spray tower spray circulation system and the spray tower demister (5) to carry out aerosol removal, dust removal and ammonia escape during the rising process;
s3: the industrial waste gas continuously rises, enters the chimney (7) through the flue (6), and is discharged from the top of the chimney (7) after dust removal, aerosol removal, ammonia escape reduction and demisting are carried out through the chimney spray circulation system and the chimney demister (8) in the rising process.
2. The single-tower multi-cycle desulfurization dust removal process according to claim 1, wherein the packed tower spray circulation system comprises a packed tower circulation pump (9) and a packed tower sprayer (10); the packed tower sprayer (10) is arranged in the packed tower (1); the filler tower sprayer (10) is positioned above the filler layer (2); the filler tower sprayer (10) is communicated with the bottom of the filler tower (1) through the filler tower circulating pump (9); in S1, a filler tower circulating pump (9) conveys filler tower circulating liquid at the bottom of the filler tower (1) to a filler tower sprayer (10), and the filler tower sprayer (10) sprays the filler tower circulating liquid to contact industrial waste gas and then falls back to the bottom of the filler tower (1).
3. The single-tower multi-cycle desulfurization dust removal process according to claim 1, wherein a filler tower overflow pipe (11) is arranged inside the filler tower (1); one end of the filler tower overflow pipe (11) extends into the bottom of the filler tower (1), and the other end of the filler tower overflow pipe (11) extends to the outside of the filler tower (1).
4. The single-tower multi-cycle desulfurization and dust removal process according to claim 1, wherein a filler tower emptying pipe is arranged at the bottom of the filler tower (1); and a filler tower emptying valve (12) is arranged on the filler tower emptying pipe.
5. The single-tower multi-cycle desulfurization dust removal process according to claim 1, wherein the spray tower spray circulation system comprises an annular water tank (13), a guide pipe (14), a spray tower circulation pump (15) and a spray tower sprayer (16); the annular water tank (13) is sleeved at the bottom of the outer side of the spray tower (4); the spray tower sprayer (16) is arranged in the spray tower (4); the spray tower sprayer (16) is positioned below the spray tower demister (5); the spray tower sprayer (16) is communicated with the annular water tank (13) through a spray tower circulating pump (15); one end of the flow guide pipe (14) is communicated with the bottom of the spray tower (4), and the other end of the flow guide pipe (14) is communicated with the annular water tank (13); in S2, the spray tower circulating pump (15) conveys the spray tower circulating liquid in the annular water tank (13) to the spray tower sprayer (16), and after the spray tower sprayer (16) sprays the spray tower circulating liquid to contact with industrial waste gas, the spray tower circulating liquid falls to the bottom of the spray tower (4) and flows back into the annular water tank (13) through the guide pipe (14).
6. The single-tower multi-cycle desulfurization dust removal process according to claim 5, wherein an annular water tank overflow pipe (17) is arranged inside the annular water tank (13); one end of the annular water tank overflow pipe (17) extends into the bottom of the annular water tank (13), and the other end of the annular water tank overflow pipe (17) penetrates through the annular water tank (13) and is communicated with the packing tower (1).
7. The single-tower multi-cycle desulfurization and dust removal process according to claim 6, wherein the bottom of the annular water tank (13) is connected with an annular water tank emptying pipe (18); the other end of the annular water tank emptying pipe (18) is communicated with the packed tower (1); an annular water tank emptying valve (19) is arranged on the annular water tank emptying pipe (18).
8. The single-tower multi-cycle desulfurization dust removal process according to claim 1, wherein the chimney spray circulation system comprises a chimney circulation pump (20) and a chimney sprayer (21); a process water tank (22) is arranged at the bottom of the chimney (7); the chimney sprayer (21) is arranged inside the chimney (7); the chimney sprayer (21) is communicated with the process water tank (22) through the chimney circulating pump (20); in S2, the chimney circulating pump (20) conveys the process water in the process water tank (22) to the chimney sprayer (21), and the process water is sprayed by the chimney sprayer (21) and falls back into the process water tank (22).
9. The single-tower multi-cycle desulfurization dust removal process according to claim 8, wherein a process water tank overflow pipe (23) is arranged inside the process water tank (22); one end of the process water tank overflow pipe (23) extends into the bottom of the process water tank (22), and the other end of the process water tank overflow pipe (23) extends to the outside of the chimney (7).
10. The single-tower multi-cycle desulfurization dust removal process according to claim 8, wherein a process water tank emptying pipe is arranged at the bottom of the process water tank (22); a process tank drain valve (24) is provided on the process tank drain pipe.
CN202310114343.XA 2023-02-08 2023-02-08 Single-tower multi-cycle desulfurization and dust removal process Pending CN116196731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310114343.XA CN116196731A (en) 2023-02-08 2023-02-08 Single-tower multi-cycle desulfurization and dust removal process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310114343.XA CN116196731A (en) 2023-02-08 2023-02-08 Single-tower multi-cycle desulfurization and dust removal process

Publications (1)

Publication Number Publication Date
CN116196731A true CN116196731A (en) 2023-06-02

Family

ID=86507270

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310114343.XA Pending CN116196731A (en) 2023-02-08 2023-02-08 Single-tower multi-cycle desulfurization and dust removal process

Country Status (1)

Country Link
CN (1) CN116196731A (en)

Similar Documents

Publication Publication Date Title
EP0738178B1 (en) Flue gas scrubbing apparatus
CN201609633U (en) Ammonia flue gas desulfurization device of byproducts of ammonium hydrogen sulfite and ammonium sulfite
US5645802A (en) Method and apparatus for the treatment of a waste gas containing dists and chemical contaminants
US5120518A (en) Method and apparatus for the treatment of a waste gas containing dusts and chemical contaminants
CN101549235B (en) Conjoined wet-type dust cleaning and desulfurizing device
CN108786398B (en) Flue gas desulfurization and regeneration integrated tower and renewable wet flue gas desulfurization method
CN204816213U (en) High -efficient wet flue gas desulfurization dust removal integrated device
KR101871443B1 (en) Wet purification equipment for biogas and odor gas
CN110898620A (en) Fountain exhaust gas purification device
CN116196731A (en) Single-tower multi-cycle desulfurization and dust removal process
CN216825623U (en) Flue gas dust removal and desulfurization device
US6090357A (en) Flue gas scrubbing method
CN201249101Y (en) Two-stage parallel spray thionizer
CN216825595U (en) Internal circulation flue gas dust removal and desulfurization device
CN216825452U (en) External circulation flue gas dust removal and desulfurization device
CN205868002U (en) Flue gas desulfurization reaction tower
CN212348313U (en) Integrated flue gas purification system and biomass power plant combustion purification system
CN209997445U (en) flue gas desulfurization haze reduction tower
CN106000094A (en) Desulfurization reaction tower and desulfurization process
CN200991629Y (en) Smoke purifying apparatus
CN219804440U (en) Wet flue gas desulfurization device
CN219804448U (en) Two-stage washing tower for treating TRS gas for papermaking
CN114471129B (en) Flue gas dust removal desulfurization device
CN219815725U (en) Tail gas absorption tower
CN217887411U (en) Be used for coal fired power plant wet flue gas desulfurization dust collector for flue gas

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination