CN116809235A - System and method for purifying and circulating acid-making flue gas - Google Patents
System and method for purifying and circulating acid-making flue gas Download PDFInfo
- Publication number
- CN116809235A CN116809235A CN202310321176.6A CN202310321176A CN116809235A CN 116809235 A CN116809235 A CN 116809235A CN 202310321176 A CN202310321176 A CN 202310321176A CN 116809235 A CN116809235 A CN 116809235A
- Authority
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- China
- Prior art keywords
- liquid
- tank
- dynamic wave
- flue gas
- cooling tower
- 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.)
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Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000003546 flue gas Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 103
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 239000002253 acid Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 31
- 238000000746 purification Methods 0.000 claims abstract description 15
- 238000010306 acid treatment Methods 0.000 claims description 9
- 239000003595 mist Substances 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000013505 freshwater Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a purification and circulation system and a purification method for acid making flue gas, wherein the circulation system comprises: the liquid outlet of the electric demister is communicated with the liquid inlet of the secondary dynamic wave; the liquid outlet of the secondary dynamic wave is communicated with the liquid inlet of the primary dynamic wave; an air inlet of the air cooling tower is communicated with the primary power wave; the liquid outlet of the gas cooling tower is communicated with the liquid inlet of the accident water overhead tank; the liquid outlet of the accident water high-level tank is communicated with the liquid inlet of the overflow weir, and the liquid outlet of the overflow weir is communicated with the liquid inlet of the primary dynamic wave. The purification and circulation system can reduce the dust content of the circulating liquid and improve the production efficiency.
Description
Technical Field
The invention relates to the technical field of dust removal, in particular to a purification and circulation system and a purification method for acid-making flue gas.
Background
In the existing industrial sulfuric acid preparation process, many flue gas purification modes adopt a dilute acid circulation acid washing mode. The pickling mode has the advantages of strong adaptability, convenient operation, reliable technology and adjustable discharge amount of the polluted acid; the flue gas purifying effect index is stable. The general process flow adopted is as follows: the purification mode of the primary dynamic wave-gas cooling tower-secondary dynamic wave-two-stage electric demister removes dust, impurities, acid mist, heat and the like in the flue gas. Because the flue gas temperature is higher, the purification section basically can be provided with a high-level tank filled with clear water or circulating dilute acid, under the condition that a primary dynamic wave circulating pump is jumped and stopped, liquid in the high-level tank can be used for protecting a flue gas pipeline, but when the primary dynamic wave circulating liquid is used in the accident water high-level tank, the primary dynamic wave circulating liquid contains dust to block the accident water pipeline, and the flue gas pipeline can be damaged.
Therefore, the research on an acid making flue gas purifying and circulating system and a purifying method capable of reducing the dust content of circulating liquid and improving the production efficiency is a problem which needs to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the invention provides a purifying and circulating system and a purifying method for acid-making flue gas, which can reduce the dust content of circulating liquid and improve the production efficiency.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a pickling flue gas purification and circulation system comprising:
an electric demister is arranged on the inner wall of the electric demister,
the liquid outlet of the electric demister is communicated with the liquid inlet of the secondary dynamic wave;
the liquid outlet of the secondary dynamic wave is communicated with the liquid inlet of the primary dynamic wave;
the air inlet of the gas cooling tower is communicated with the primary power wave;
the liquid outlet of the gas cooling tower is communicated with the liquid inlet of the accident water head tank;
the liquid outlet of the accident water high-level tank is communicated with the liquid inlet of the overflow weir, and the liquid outlet of the overflow weir is communicated with the liquid inlet of the primary dynamic wave.
The technical scheme has the beneficial effects that the circulating liquid in the gas cooling tower has little dust content, and the circulating liquid in the gas cooling tower is fed into the accident water overhead tank, so that the accident water overhead tank is prevented from being blocked, and the production efficiency is improved.
Preferably, the liquid inlet of the secondary dynamic wave is communicated with a new water supplementing pipeline. When the circulating liquid in the secondary dynamic wave is insufficient, the new water can be supplemented into the secondary dynamic wave through the new water supplementing pipeline.
Preferably, the liquid outlet of the primary dynamic wave is connected with a conical settling tank. Excess water in the primary dynamic wave can be discharged into the conical settling tank.
Preferably, the liquid outlet of the conical settling tank is connected with a dilute acid tank.
Preferably, a liquid outlet of the dilute acid tank is connected with a sewage acid treatment tank.
The purifying method of the acid making flue gas purifying and circulating system comprises the following purifying steps:
1) Acid mist and partial water in the flue gas collected by the electric demister flow into the secondary dynamic wave through the pipeline, and when the liquid level of the secondary dynamic wave is higher than 1.8m, an acid-stringing valve is opened to convey redundant circulating liquid into the primary dynamic wave;
2) Because the primary dynamic wave effect is to cool down in an adiabatic way, a large amount of water vapor is brought into the gas cooling tower by the flue gas, so that the liquid level in the gas cooling tower is increased, and after the liquid level in the gas cooling tower is increased, the circulating liquid is conveyed into an accident water overhead tank;
3) Opening an adjusting valve of a liquid outlet of the accident water high-level tank, wherein circulating liquid in the accident water high-level tank flows into an overflow weir, and water in the overflow weir enters into a primary dynamic wave to form a circulation;
4) In the circulation process, redundant water generated by primary dynamic waves can enter a conical settling tank, liquid in the conical settling tank overflows into a dilute acid tank, and then is conveyed into a sewage acid treatment tank by a pump for treatment.
Preferably, the liquid level of the primary dynamic wave and the secondary dynamic wave is 1-1.8mm.
Preferably, the liquid level of the gas cooling tower is 1-2mm; the liquid level of the accident water overhead tank is 1.5-2m.
Compared with the prior art, the invention discloses a purifying and circulating system and a purifying method for acid making flue gas, which have the beneficial effects that:
(1) According to the invention, circulating liquid in the gas cooling tower with the minimum dust content in the circulating liquid for purifying each tank is used as water for the accident water overhead tank, so that the accident water overhead tank is prevented from being blocked, and the production efficiency is improved;
(2) The circulating system has strong adaptability, simple operation, low operation cost and smoother acid flowing of the whole circulating liquid.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a purification and circulation system provided by the invention.
Wherein, in the drawing,
1-an electric mist eliminator; 2-secondary dynamic waves; 3-primary dynamic waves; 4-a gas cooling tower; 5-accident water high-level tank; 6-overflow weir; 7-new water is fed into the pipeline; 8-a conical settling tank; 9-a dilute acid tank; 10-a dirty acid treatment tank.
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.
The embodiment of the invention discloses a purification and circulation system for acid making flue gas, which comprises the following components:
the electric mist eliminator (1) is provided with a plurality of air-blowing nozzles,
the liquid outlet of the electric demister 1 is communicated with the liquid inlet of the secondary dynamic wave 2;
the liquid outlet of the first-stage dynamic wave 3 and the liquid outlet of the second-stage dynamic wave 2 are communicated with the liquid inlet of the first-stage dynamic wave 3;
the gas cooling tower 4, the air inlet of the gas cooling tower 4 is communicated with the primary dynamic wave 3;
the liquid outlet of the gas cooling tower 4 is communicated with the liquid inlet of the accident water head tank 5;
the liquid outlet of the accident water high-level tank 5 is communicated with the liquid inlet of the overflow weir 6, and the liquid outlet of the overflow weir 6 is communicated with the liquid inlet of the primary dynamic wave 3. The circulating acid liquid enters a secondary dynamic wave 2 through an electric demister 1, when the circulating liquid of the secondary dynamic wave 2 is insufficient, new water can be supplemented, then the circulating liquid directly enters a primary dynamic wave 3, the circulating liquid of a gas cooling tower 4 enters an accident water overhead tank 5, the circulating liquid enters the primary dynamic wave 3 after flowing through an overflow weir 6, and the circulating liquid of the primary dynamic wave 3 enters a conical settling tank 8 and then overflows into a dilute acid tank 9 for carrying out acid treatment, so that a new circulating system of the circulating liquid is formed.
In order to further optimize the technical scheme, the liquid inlet of the secondary dynamic wave 2 is communicated with a new water supplementing pipeline 7.
In order to further optimize the technical scheme, a conical settling tank 8 is connected to the liquid outlet of the primary dynamic wave 3. The primary dynamic wave 3 discharges excessive water to enter a conical sedimentation tank 8, overflows and enters a dilute acid tank 9, and is pumped to the sewage acid treatment for treatment.
In order to further optimize the technical scheme, the liquid outlet of the conical settling tank 8 is connected with a dilute acid tank 9.
In order to further optimize the technical scheme, a liquid outlet of the dilute acid tank 9 is connected with a sewage acid treatment tank 10.
The purifying method of the acid making flue gas purifying and circulating system comprises the following purifying steps:
1) Acid mist and partial moisture in the flue gas collected by the electric demister 1 flow into the secondary dynamic wave 2 through a pipeline, and when the liquid level of the secondary dynamic wave 2 is higher than 1.8m, an acid-stringing valve is opened to convey redundant circulating liquid into the primary dynamic wave 3;
2) Because the primary dynamic wave 3 is used for adiabatic cooling, a large amount of water vapor is brought into the gas cooling tower 4 by the flue gas, so that the liquid level in the gas cooling tower 4 is increased, and after the liquid level in the gas cooling tower 4 is increased, the circulating liquid is conveyed into the accident water overhead tank 5;
3) Opening an adjusting valve of a liquid outlet of the accident water high-level tank 5, wherein circulating liquid in the accident water high-level tank 5 flows into the overflow weir 6, and water in the overflow weir 6 flows into the primary power wave 3 to form a circulation;
4) In the circulation process, the excessive moisture generated by the primary dynamic wave 3 can enter the conical settling tank 8, the liquid in the conical settling tank 8 overflows into the dilute acid tank 9, and then the dilute acid tank is conveyed into the sewage acid treatment tank 10 by a pump for treatment.
In order to further optimize the above technical solution, the flow direction of the circulating liquid is indicated by the arrow in fig. 1, and the flue gas of the primary power wave 3 does not carry dust, and the flue gas in the primary power wave 3 enters the gas cooling tower 4, so that no dust enters the gas cooling tower 4.
In order to further optimize the technical scheme, the purification section belongs to semi-adiabatic cooling, the primary power wave 3 loses the most water, and the gas cooling tower 4 collects the most water, so that the gas cooling tower 4 does not need to add new water to maintain the liquid level.
In order to further optimize the technical scheme, the liquid levels of the primary dynamic wave 3 and the secondary dynamic wave 2 are 1-1.8mm.
In order to further optimize the technical proposal, the liquid level of the gas cooling tower 4 is 1-2mm; the liquid level of the accident water overhead tank 5 is 1.5-2m.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A system for purifying and circulating sour flue gas, comprising:
an electric demister (1),
the liquid outlet of the electric demister (1) is communicated with the liquid inlet of the secondary dynamic wave (2);
the liquid outlet of the secondary dynamic wave (2) is communicated with the liquid inlet of the primary dynamic wave (3);
the gas cooling tower (4), the air inlet of the gas cooling tower (4) is communicated with the primary dynamic wave (3);
the liquid outlet of the gas cooling tower (4) is communicated with the liquid inlet of the accident water head tank (5);
the overflow weir (6), the liquid outlet of accident water elevated tank (5) is linked together with the inlet of overflow weir (6), the liquid outlet of overflow weir (6) is linked together with the inlet of one-level dynamic wave (3).
2. The system according to claim 1, characterized in that the liquid inlet of the secondary power wave (2) is connected with a fresh water supplementing pipeline (7).
3. The system according to claim 2, characterized in that the outlet of the primary power wave (3) is connected with a conical settling tank (8).
4. A pickling flue gas purification and circulation system according to claim 3, characterized in that the outlet of the conical settling tank (8) is connected with a dilute acid tank (9).
5. The acid making flue gas purifying and circulating system according to claim 4, wherein the liquid outlet of the dilute acid tank (9) is connected with a waste acid treatment tank (10).
6. A method for purifying a pickling flue gas purification cycle as recited in claims 1 to 5, comprising the steps of:
1) acid mist and partial moisture in the flue gas collected by the electric demister (1) flow into the secondary dynamic wave (2) through a pipeline, and when the liquid level of the secondary dynamic wave (2) is higher than 1.8m, an acid-stringing valve is opened to convey redundant circulating liquid into the primary dynamic wave (3);
2) Because the primary dynamic wave (3) acts as heat insulation and temperature reduction, a large amount of water vapor is brought into the gas cooling tower (4) by flue gas, so that the liquid level in the gas cooling tower (4) is increased, and after the liquid level in the gas cooling tower (4) is increased, circulating liquid is conveyed into the accident water high-level tank (5);
3) Opening an adjusting valve of a liquid outlet of the accident water high-level tank (5), wherein circulating liquid in the accident water high-level tank (5) can flow into an overflow weir (6), and water in the overflow weir (6) can enter into the primary dynamic wave (3) to form a circulation;
4) In the circulation process, redundant water generated by the primary dynamic wave (3) can enter a conical sedimentation tank (8), liquid overflows from the conical sedimentation tank (8) into a dilute acid tank (9), and then is conveyed into a sewage acid treatment tank (10) by a pump for treatment.
7. The method for purifying and circulating the acid making flue gas according to claim 6, wherein the liquid level of the primary power wave (3) and the secondary power wave (2) is 1-1.8mm.
8. The method for purifying a pickling flue gas purification cycle according to claim 6, characterized in that the liquid level of the gas cooling tower (4) is 1-2mm; the liquid level of the accident water high-level tank (5) is 1.5-2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310321176.6A CN116809235A (en) | 2023-03-29 | 2023-03-29 | System and method for purifying and circulating acid-making flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310321176.6A CN116809235A (en) | 2023-03-29 | 2023-03-29 | System and method for purifying and circulating acid-making flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116809235A true CN116809235A (en) | 2023-09-29 |
Family
ID=88124836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310321176.6A Pending CN116809235A (en) | 2023-03-29 | 2023-03-29 | System and method for purifying and circulating acid-making flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116809235A (en) |
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2023
- 2023-03-29 CN CN202310321176.6A patent/CN116809235A/en active Pending
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