CN115445424A - Acid mist waste gas treatment system - Google Patents

Acid mist waste gas treatment system Download PDF

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Publication number
CN115445424A
CN115445424A CN202211257141.2A CN202211257141A CN115445424A CN 115445424 A CN115445424 A CN 115445424A CN 202211257141 A CN202211257141 A CN 202211257141A CN 115445424 A CN115445424 A CN 115445424A
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CN
China
Prior art keywords
spray tower
packing
filler
acid mist
filler spray
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
CN202211257141.2A
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Chinese (zh)
Inventor
张稀雅
易发星
易必峰
王占英
张玉胜
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.)
Shengzhou Light Industry Machinery Co ltd
Original Assignee
Shengzhou Light Industry Machinery 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 Shengzhou Light Industry Machinery Co ltd filed Critical Shengzhou Light Industry Machinery Co ltd
Priority to CN202211257141.2A priority Critical patent/CN115445424A/en
Publication of CN115445424A publication Critical patent/CN115445424A/en
Pending legal-status Critical Current

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    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/38—Removing components of undefined structure
    • B01D53/40—Acidic components
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/204—Inorganic halogen compounds
    • B01D2257/2047—Hydrofluoric acid

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention relates to an acid mist waste gas treatment system which comprises an acid tank, a first liquid-gas separator, a first filler spray tower, a second filler spray tower, a third filler spray tower, a second liquid-gas separator, an air purification device, a fan, first dosing equipment, second dosing equipment and a circulating assembly. The invention utilizes the physical treatment of the spray tower, simultaneously adds sodium hydroxide and yellow smoke removing agent to carry out chemical treatment with the substances in the waste gas, and takes out the hydrofluoric acid gas and the yellow smoke of nitric acid in the acid mist waste gas by adopting a mode of combining the chemical treatment and the physical treatment so as to reach the emission standard of the acid mist waste gas.

Description

Acid mist waste gas treatment system
Technical Field
The invention relates to a waste gas treatment device, in particular to an acid mist waste gas treatment system.
Background
Acid mist waste gas is generated in the acid washing production process of the stainless steel pipe, and if the acid mist waste gas is directly discharged in the atmosphere without being treated, the pollution is inevitably caused to the surrounding environment, and the life of surrounding residents is influenced. While the acid mist waste gas generated in the acid cleaning process of the stainless steel pipe is mainly yellow smoke of hydrofluoric acid gas and nitric acid. According to the requirement of clean production, in the treatment process, the substances are firstly considered to be purified, and the emission is required to reach the standard. There is a lack of such systems for radial treatment of yellow fumes with hydrofluoric acid gas and nitric acid.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an acid mist waste gas treatment system.
The technical scheme adopted by the invention is as follows: an acid mist waste gas treatment system comprises an acid tank, a first liquid-gas separator, a first filler spray tower, a second filler spray tower, a third filler spray tower, a second liquid-gas separator, an air purification device, a fan, first dosing equipment, second dosing equipment and a circulating assembly;
the acid tank, the first liquid-gas separator, the first filler spray tower, the second filler spray tower, the third filler spray tower, the second liquid-gas separator, the air purification device and the fan are sequentially connected through pipe fittings;
the first dosing equipment is respectively connected with the first filler spray tower, the second filler spray tower and the third filler spray tower through pipe fittings, and sodium hydroxide solution is added into the first filler spray tower, the second filler spray tower and the third filler spray tower;
the second dosing equipment is connected with the second filler spray tower and is used for adding the yellow smoke removing agent into the second filler spray tower;
the first filler spray tower, the second filler spray tower and the third filler spray tower are all provided with a circulating assembly, and the circulating assembly is used for pumping liquid at the bottom of the first filler spray tower, the second filler spray tower or the third filler spray tower to a filler layer above the first filler spray tower, the second filler spray tower or the third filler spray tower.
Furthermore, three packing layers are arranged in the first packing spray tower, the second packing spray tower and the third packing spray tower.
Further, the packing layer is a defogging layer, a filter material layer and a filter material layer from top to bottom in sequence.
Furthermore, the circulation component is a circulation pump, one end of the circulation pump is connected with the bottom of the first filler spray tower, the second filler spray tower or the third filler spray tower through a pipe fitting, and the other end of the circulation pump is connected above the filler layer in the first filler spray tower, the second filler spray tower or the third filler spray tower through a pipe fitting.
Furthermore, waste liquid discharge ports are formed in the bottoms of the first filler spray tower, the second filler spray tower and the third filler spray tower, a liquid discharge pipe is connected to each waste liquid discharge port, and the water outlet ends of the liquid discharge pipes are connected with a waste water discharge pipe in a unified mode.
Further, the concentration of sodium hydroxide in the first packing spray tower, the second packing spray tower and the third packing spray tower is 8-16%.
Further, the concentration of the yellow smoke removing agent in the first filler spray tower, the second filler spray tower and the third filler spray tower is 8-16%.
The beneficial effects of the invention are: the invention utilizes the physical treatment of the spray tower, simultaneously adds sodium hydroxide and yellow smoke removing agent to carry out chemical treatment with the substances in the waste gas, and takes out the hydrofluoric acid gas and the yellow smoke of nitric acid in the acid mist waste gas by adopting a mode of combining the chemical treatment and the physical treatment so as to reach the emission standard of the acid mist waste gas.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In fig. 1: 1. an acid tank; 2. a first liquid-gas separator; 3. a first packing spray tower; 4. a second packing spray tower; 5. a third packing spray tower; 6. a second liquid-gas separator; 7. an air purification device; 8. a fan; 9. a first dosing device; 10. a second dosing device; 11. a circulation component; 12. a demisting layer; 13. a filter material layer; 14. a filter material layer; 15. a liquid discharge pipe; 16. the waste water discharge pipe is connected.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
The invention provides an acid mist waste gas treatment system, and refers to fig. 1.
Example 1:
the acid mist waste gas treatment system comprises an acid tank 1, a first liquid-gas separator 2, a first filler spray tower 3, a second filler spray tower 4, a third filler spray tower 5, a second liquid-gas separator 6, an air purification device 7, a fan 8, a first dosing device 9, a second dosing device 10 and a circulation assembly 11;
the acid tank, the first liquid-gas separator, the first filler spray tower, the second filler spray tower, the third filler spray tower, the second liquid-gas separator, the air purification device and the fan are sequentially connected through pipe fittings;
the first dosing equipment is respectively connected with the first filler spray tower, the second filler spray tower and the third filler spray tower through pipe fittings, and sodium hydroxide solution is added into the first filler spray tower, the second filler spray tower and the third filler spray tower;
the second dosing equipment is connected with the second filler spray tower and is used for adding the yellow smoke removing agent into the second filler spray tower;
the first filler spray tower, the second filler spray tower and the third filler spray tower are all provided with a circulating assembly, and the circulating assembly is used for pumping liquid at the bottom of the first filler spray tower, the second filler spray tower or the third filler spray tower to a filler layer above the first filler spray tower, the second filler spray tower or the third filler spray tower.
Specifically, three packing layers are arranged in the first packing spray tower, the second packing spray tower and the third packing spray tower.
Specifically, the packing layer is a demisting layer 12, a filter material layer 13 and a filter material layer 14 from top to bottom in sequence.
Specifically, the circulation component is a circulation pump, one end of the circulation pump is connected with the bottom of the first filler spray tower, the second filler spray tower or the third filler spray tower through a pipe fitting, and the other end of the circulation pump is connected to the upper portion of the filler layer in the first filler spray tower, the second filler spray tower or the third filler spray tower through a pipe fitting.
Specifically, waste liquid discharge ports are formed in the bottoms of the first filler spray tower, the second filler spray tower and the third filler spray tower, a liquid discharge pipe 15 is connected to each waste liquid discharge port, and the water outlet ends of the liquid discharge pipes are connected with a waste water discharge pipe 16 in a unified mode.
Specifically, the concentration of sodium hydroxide in the first packing spray tower, the second packing spray tower and the third packing spray tower is 8%.
Specifically, the concentration of the yellow smoke removing agent in the first filler spray tower, the second filler spray tower and the third filler spray tower is 8%.
Example 2:
specifically, the concentration of sodium hydroxide in the first packing spray tower, the second packing spray tower and the third packing spray tower is 12%.
Specifically, the concentration of the yellow smoke removing agent in the first filler spray tower, the second filler spray tower and the third filler spray tower is 12%.
Example 3:
specifically, the concentration of sodium hydroxide in the first packing spray tower, the second packing spray tower and the third packing spray tower is 16%.
Specifically, the concentration of the yellow smoke removing agent in the first filler spray tower, the second filler spray tower and the third filler spray tower is 16%.
The only differences between example 1, example 2 and example 3 are in the sodium hydroxide concentration and the concentration of the yellow smoke remover.
The specific principle of the invention is as follows:
the acid mist waste gas in the acid tank takes a fan as power, firstly enters a first liquid-gas separator to remove water stain in the acid mist waste gas, the acid mist waste gas enters a first filler spray tower, a sodium hydroxide solution in the first filler spray tower is pumped to a filler layer of the first filler spray tower by a circulating assembly and flows from top to bottom, at the moment, the acid mist waste gas flows upwards in a counter-flow manner, gas-liquid interaction is carried out on the wet surface of the filler layer, physical and chemical reactions occur, and the process is mainly used for removing hydrofluoric acid gas in the acid mist waste gas. The gas after passing through the first filler spray tower continuously enters the second filler spray tower, the operation principle is the same as that of the gas entering the first filler spray tower, and the difference is that the waste gas at the moment mainly performs physical and chemical reactions with the yellow smoke remover solution in the second filler spray tower and is mainly used for removing the yellow smoke of nitric acid in the waste gas. And the gas after passing through the second packing spray tower continuously enters a third packing spray tower, and the third packing spray tower is the same as the first packing spray tower and is used for removing hydrofluoric acid gas for the second time, so that the hydrofluoric acid gas in the waste gas can be completely removed. And the gas passing through the third filler spray tower passes through a second liquid-gas separator to separate water from tail gas, and finally the dried gas after water-gas separation is purified by an air purification device and is discharged after reaching the standard.
The invention utilizes the physical treatment of the spray tower, simultaneously adds sodium hydroxide and yellow smoke removing agent to carry out chemical treatment with the substances in the waste gas, and takes out hydrofluoric acid gas and yellow smoke of nitric acid in the acid mist waste gas by adopting a mode of combining the chemical treatment and the physical treatment so as to reach the emission standard of the acid mist waste gas.
The skilled person should know that: although the invention has been described in terms of the above specific embodiments, the inventive concept is not limited thereto and any modification applying the inventive concept is intended to be included within the scope of the patent claims.

Claims (7)

1. An acid mist waste gas treatment system, characterized in that: the device comprises an acid tank, a first liquid-gas separator, a first filler spray tower, a second filler spray tower, a third filler spray tower, a second liquid-gas separator, an air purification device, a fan, a first dosing device, a second dosing device and a circulating assembly;
the acid tank, the first liquid-gas separator, the first filler spray tower, the second filler spray tower, the third filler spray tower, the second liquid-gas separator, the air purification device and the fan are sequentially connected through pipe fittings;
the first dosing equipment is respectively connected with the first packing spray tower, the second packing spray tower and the third packing spray tower through pipe fittings, and sodium hydroxide solution is added into the first packing spray tower, the second packing spray tower and the third packing spray tower;
the second dosing equipment is connected with the second packing spray tower and is used for adding the yellow smoke removing agent into the second packing spray tower;
the first packing spray tower, the second packing spray tower and the third packing spray tower are all provided with a circulating assembly, and the circulating assembly is used for pumping liquid at the bottom of the first packing spray tower, the second packing spray tower or the third packing spray tower to a packing layer above the first packing spray tower, the second packing spray tower or the third packing spray tower.
2. The acid mist exhaust gas treatment system of claim 1, wherein: and three packing layers are arranged in the first packing spray tower, the second packing spray tower and the third packing spray tower.
3. The acid mist exhaust gas treatment system of claim 2, wherein: the packing layer is a defogging layer, a filter material layer and a filter material layer from top to bottom in sequence.
4. The acid mist exhaust gas treatment system of claim 1, wherein: the circulating component is a circulating pump, one end of the circulating pump is connected with the bottom of the first filler spray tower, the second filler spray tower or the third filler spray tower through a pipe fitting, and the other end of the circulating pump is connected above the filler layer in the first filler spray tower, the second filler spray tower or the third filler spray tower through a pipe fitting.
5. The acid mist exhaust gas treatment system of claim 1, wherein: and waste liquid discharge ports are formed in the bottoms of the first filler spray tower, the second filler spray tower and the third filler spray tower, a liquid discharge pipe is connected to the waste liquid discharge ports, and the water outlet ends of the liquid discharge pipes are connected with a waste water discharge pipe in a unified mode.
6. The acid mist exhaust gas treatment system of claim 1, wherein: the concentration of sodium hydroxide in the first packing spray tower, the second packing spray tower and the third packing spray tower is 8-16%.
7. The acid mist exhaust gas treatment system of claim 1, wherein: the concentration of the yellow smoke removing agent in the first packing spray tower, the second packing spray tower and the third packing spray tower is 8-16%.
CN202211257141.2A 2022-10-14 2022-10-14 Acid mist waste gas treatment system Pending CN115445424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211257141.2A CN115445424A (en) 2022-10-14 2022-10-14 Acid mist waste gas treatment system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211257141.2A CN115445424A (en) 2022-10-14 2022-10-14 Acid mist waste gas treatment system

Publications (1)

Publication Number Publication Date
CN115445424A true CN115445424A (en) 2022-12-09

Family

ID=84310414

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211257141.2A Pending CN115445424A (en) 2022-10-14 2022-10-14 Acid mist waste gas treatment system

Country Status (1)

Country Link
CN (1) CN115445424A (en)

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