CN113262611A - Automatic add acid mist washing equipment of alkali - Google Patents
Automatic add acid mist washing equipment of alkali Download PDFInfo
- Publication number
- CN113262611A CN113262611A CN202110535447.9A CN202110535447A CN113262611A CN 113262611 A CN113262611 A CN 113262611A CN 202110535447 A CN202110535447 A CN 202110535447A CN 113262611 A CN113262611 A CN 113262611A
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- Prior art keywords
- alkali
- alkali liquor
- main
- pump
- delivery pump
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- 239000003513 alkali Substances 0.000 title claims abstract description 116
- 238000005406 washing Methods 0.000 title claims abstract description 50
- 239000002253 acid Substances 0.000 title claims abstract description 33
- 239000003595 mist Substances 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 claims description 39
- 238000001802 infusion Methods 0.000 claims description 4
- 230000003113 alkalizing effect Effects 0.000 claims 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000000945 filler Substances 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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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
- B01D53/38—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
- B01D53/346—Controlling the 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
- B01D53/34—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
- 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
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an acid mist washing device capable of automatically adding alkali, which comprises: the system comprises a control system, an alkali liquor tank, a main alkali liquor delivery pump, a standby alkali liquor delivery pump, a control electromagnetic valve and a washing tower; the control system is electrically connected with the main alkali liquor delivery pump, the standby alkali liquor delivery pump and the control electromagnetic valve; one end of the main alkali liquor conveying pump is connected with the alkali liquor tank through a pipeline, and the other end of the main alkali liquor conveying pump passes through the control electromagnetic valve and then is connected with the washing tower through a pipeline; one end of the spare alkali liquor delivery pump is connected with the alkali liquor tank through a pipeline, and the other end of the spare alkali liquor delivery pump passes through the control electromagnetic valve and then is connected with the washing tower through a pipeline. The invention can control the PH value (PH value is 6-8) of the circulating water at the bottom of the acid mist washing tower, ensure the acid mist filtering effect after the circulating water is sprayed, eliminate the hidden trouble that the HCL content in the discharged flue gas exceeds the standard, reduce the consumption of the sprayed desalted water and achieve the win-win effects of environmental protection and energy saving.
Description
Technical Field
The invention relates to the field of metallurgy, in particular to acid mist washing equipment capable of automatically adding alkali.
Background
The pall ring filler filtering device adopted by the push-pull type acid pickling and normalizing acid mist washing tower of the acid rolling workshop of the cold rolling plant is characterized in that desalted water is continuously sprayed to enable acid mist to be adsorbed on pall ring fillers to form filtration, the desalted water is repeatedly sprayed from a bottom circulating water tank through a wastewater circulating pump, the circulating water tank is free of an alkali liquor neutralizing system, the circulating water is too high in acidity (the PH value is 1-2), the HCL content in discharged flue gas can exceed an ultralow emission limit value, the detection exceeds the standard, and the potential hazard of environmental protection exists.
Disclosure of Invention
The invention provides an acid mist washing device capable of automatically adding alkali, and the acid mist washing device is an alkali liquor neutralization system, liquid alkali is conveyed to an acid mist washing tower through an alkali liquor pump, circulating water at the bottom of the acid mist washing tower is neutralized, the PH value of the circulating water is maintained between 6 and 8, automatic addition of alkali liquor is realized through PH meter feedback and the like, and the HCL content in discharged flue gas is ensured to meet the ultra-low emission limit requirement.
In order to solve the technical problem, the invention provides an acid mist washing device for automatically adding alkali, which comprises: the system comprises a control system, an alkali liquor tank, a main alkali liquor delivery pump, a standby alkali liquor delivery pump, a control electromagnetic valve and a washing tower; the control system is electrically connected with the main alkali liquor delivery pump, the standby alkali liquor delivery pump and the control electromagnetic valve; one end of the main alkali liquor conveying pump is connected with the alkali liquor tank through a pipeline, and the other end of the main alkali liquor conveying pump passes through the control electromagnetic valve and then is connected with the washing tower through a pipeline; one end of the spare alkali liquor delivery pump is connected with the alkali liquor tank through a pipeline, and the other end of the spare alkali liquor delivery pump passes through the control electromagnetic valve and then is connected with the washing tower through a pipeline.
The invention has the beneficial effects that:
the invention can control the PH value (PH value is 6-8) of the circulating water at the bottom of the acid mist washing tower, ensure the acid mist filtering effect after the circulating water is sprayed, eliminate the hidden trouble that the HCL content in the discharged flue gas exceeds the standard, reduce the consumption of the sprayed desalted water and achieve the win-win effects of environmental protection and energy saving.
In one embodiment, a liquid level meter and a liquid level alarm device are arranged in the lye tank; the liquid level meter is electrically connected with the control system; the liquid level alarm device is electrically connected with the control system.
In one embodiment, the liquid level alarm device gives an alarm when the liquid level in the lye tank is lower than a first liquid level threshold or the liquid level in the lye tank is higher than a second liquid level threshold, and the first liquid level threshold is smaller than the second liquid level threshold.
In one embodiment, the main lye conveying pump is an alkali-resistant infusion pump, the standby lye conveying pump is an alkali-resistant infusion pump, the main lye conveying pump is a mechanical diaphragm pump, and the standby lye conveying pump is a mechanical diaphragm pump.
In one embodiment, a PH meter is arranged in the washing tower, the control system is electrically connected with the PH meter, and when the PH value collected by the PH meter is smaller than a first PH threshold value, the control system controls the lye tank to add alkali to the washing tower.
In one embodiment, the control system controls the lye tank to stop adding alkali to the scrubber when the pH value collected by the pH meter is greater than a second pH threshold, wherein the second pH threshold is greater than the first pH threshold.
In one embodiment, when the control system controls the lye tank to add alkali to the washing tower, the main lye delivery pump is used for adding alkali to the washing tower when the main lye delivery pump works normally; otherwise, adding alkali into the washing tower by using a spare alkali liquor conveying pump.
In one embodiment, the liquid outlet of the main alkali liquor conveying pump and the liquid outlet of the standby alkali liquor conveying pump are connected with an electric overflow valve through a pipeline, the electric overflow valve is electrically connected with the control system, and when the electric overflow valve is larger than the first pressure threshold, the electric overflow valve is opened, and alkali liquor flows back into the alkali liquor tank.
In one embodiment, a main manual ball valve is respectively arranged in front of and behind the main lye conveying pump, a main proximity switch is arranged on each main manual ball valve, the main proximity switches are used for judging whether the main manual ball valves are opened or not, and when the two main manual ball valves are opened, the main lye conveying pump can work.
In one embodiment, a standby manual ball valve is respectively arranged in front of and behind the standby alkali liquor delivery pump, each standby manual ball valve is provided with a standby proximity switch, the standby proximity switches are used for judging whether the standby manual ball valves are opened, and when the two standby manual ball valves are opened, the standby alkali liquor delivery pump can work.
Drawings
FIG. 1 is a schematic diagram of the structure of the acid mist washing device for automatically adding alkali according to the present invention.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1, an automatic alkaline acid mist washing apparatus includes: the system comprises a control system, an alkali liquor tank, a main alkali liquor delivery pump, a standby alkali liquor delivery pump, a control electromagnetic valve and a washing tower; the control system is electrically connected with the main alkali liquor delivery pump, the standby alkali liquor delivery pump and the control electromagnetic valve; one end of the main alkali liquor conveying pump is connected with the alkali liquor tank through a pipeline, and the other end of the main alkali liquor conveying pump passes through the control electromagnetic valve and then is connected with the washing tower through a pipeline; one end of the spare alkali liquor delivery pump is connected with the alkali liquor tank through a pipeline, and the other end of the spare alkali liquor delivery pump passes through the control electromagnetic valve and then is connected with the washing tower through a pipeline.
As shown in figure 1, an alkali liquor tank (2 m) is added to the acid mist washing tower3) One alkali liquor tank (30% of alkali liquor concentration) is made of PPH material. In order to conveniently control the liquid level of the alkali liquor tank, a liquid level meter and a liquid level alarm device are arranged in the alkali liquor tank; the liquid level meter is electrically connected with the control system; the liquid level alarm device is electrically connected with the control system.
Specifically, when the liquid level in the alkali liquor tank is lower than a first liquid level threshold value or the liquid level in the alkali liquor tank is higher than a second liquid level threshold value, the liquid level alarm device gives an alarm, and the first liquid level threshold value is smaller than the second liquid level threshold value.
The invention can control the PH value (PH value is 6-8) of the circulating water at the bottom of the acid mist washing tower, ensure the acid mist filtering effect after the circulating water is sprayed, eliminate the hidden trouble that the HCL content in the discharged flue gas exceeds the standard, reduce the consumption of the sprayed desalted water and achieve the win-win effects of environmental protection and energy saving.
Because the conveying pump is all defeated alkaline, for increase of service life, main alkali lye conveying pump adopts alkali-resisting transfer pump, reserve alkali lye conveying pump adopts alkali-resisting transfer pump, main alkali lye conveying pump is mechanical diaphragm pump, reserve alkali lye conveying pump is mechanical diaphragm pump.
Accessible PH feedback control solenoid valve realizes automatic mechanical diaphragm pump that opens and stops, be equipped with the PH meter in the scrubbing tower, control system with the PH meter electricity is connected, works as when the PH value that the PH meter was gathered is less than first PH threshold value, control system control the lye tank gives the scrubbing tower adds the alkali. In one embodiment, the control system controls the lye tank to stop adding alkali to the scrubber when the pH value collected by the pH meter is greater than a second pH threshold, wherein the second pH threshold is greater than the first pH threshold.
When the control system controls the alkali liquor tank to add alkali to the washing tower, and when the main alkali liquor conveying pump works normally, the main alkali liquor conveying pump is used for adding alkali to the washing tower; otherwise, adding alkali into the washing tower by using a spare alkali liquor conveying pump.
And newly adding an alkali liquor conveying pump (one is used and one is spare) for conveying alkali liquor to the acid mist washing tower, wherein the alkali liquor conveying pump is a mechanical diaphragm pump and is controlled by a 24V electromagnetic valve, a manual ball valve is arranged in a compressed air pipeline in front of the electromagnetic valve to control the gas access of a main pipe, and a manual ball valve is arranged in a compressed air pipeline in front of the diaphragm pump to control the conveying of compressed air.
An electric overflow valve is arranged at the outlet of the pump to ensure the pressure of the pipeline, and when the pressure value is larger than a set value, the liquid can automatically flow back to the alkali liquor tank. And when the electric overflow valve is larger than the first pressure threshold value, the electric overflow valve is opened, and alkali liquor flows back into the alkali liquor tank.
Manual ball valves and solution switches are installed on alkali liquor conveying pipelines in the front and at the back of the diaphragm pump, so that the pump can be started only when the valve is opened, and the pump is prevented from being burnt out in an idle running mode. The method comprises the following specific steps:
the front and the back of the main alkali liquor delivery pump are respectively provided with a main manual ball valve, each main manual ball valve is provided with a main proximity switch, the main proximity switches are used for judging whether the main manual ball valves are opened, and when the two main manual ball valves are opened, the main alkali liquor delivery pump can work.
Spare alkali lye delivery pump respectively is equipped with a reserve manual ball valve around, all is equipped with reserve proximity switch on every reserve manual ball valve, reserve proximity switch is used for judging whether reserve manual ball valve is opened, when two reserve manual ball valves were all opened, reserve alkali lye delivery pump could work.
The proximity switch is connected to the inlet and outlet ball valves of the pump in a linked mode through signals fed back by the proximity switch to ensure that the pump can be started after the ball valves are opened, or the pump can not be started while the pressure switch is arranged at the inlet of the pump and connected into the control system to ensure that the pump can be started after the pressure signal is in the pipeline, so that the phenomenon that the pump is burnt out due to the fact that the alkali liquor in the alkali liquor tank is used up and no flow exists can be avoided, and double insurance is achieved.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. An automatic acid mist washing equipment with alkali, which is characterized by comprising: the system comprises a control system, an alkali liquor tank, a main alkali liquor delivery pump, a standby alkali liquor delivery pump, a control electromagnetic valve and a washing tower; the control system is electrically connected with the main alkali liquor delivery pump, the standby alkali liquor delivery pump and the control electromagnetic valve; one end of the main alkali liquor conveying pump is connected with the alkali liquor tank through a pipeline, and the other end of the main alkali liquor conveying pump passes through the control electromagnetic valve and then is connected with the washing tower through a pipeline; one end of the spare alkali liquor delivery pump is connected with the alkali liquor tank through a pipeline, and the other end of the spare alkali liquor delivery pump passes through the control electromagnetic valve and then is connected with the washing tower through a pipeline.
2. The acid mist washing apparatus for automatically adding soda according to claim 1, wherein a liquid level meter and a liquid level alarm device are provided in the soda tank; the liquid level meter is electrically connected with the control system; the liquid level alarm device is electrically connected with the control system.
3. The acid mist washing apparatus with automatic alkalization according to claim 2, characterized in that the level alarm device gives an alarm when the liquid level in the lye tank is lower than a first level threshold or when the liquid level in the lye tank is higher than a second level threshold, the first level threshold being lower than the second level threshold.
4. The automatic alkalizing acid mist washing apparatus of claim 1, wherein the main lye delivery pump is an alkali-proof infusion pump, the standby lye delivery pump is an alkali-proof infusion pump, the main lye delivery pump is a mechanical diaphragm pump, and the standby lye delivery pump is a mechanical diaphragm pump.
5. The acid mist washing apparatus for automatically adding alkali according to claim 1, wherein a PH meter is disposed in the washing tower, the control system is electrically connected to the PH meter, and the control system controls the lye tank to add alkali to the washing tower when the PH value collected by the PH meter is less than a first PH threshold.
6. The acid mist wash apparatus for automatically adding alkali according to claim 5, wherein the control system controls the lye tank to stop adding alkali to the wash column when the pH value sensed by the pH meter is greater than a second pH threshold, the second pH threshold being greater than the first pH threshold.
7. The acid mist washing apparatus for automatically adding alkali according to claim 5, wherein the control system controls the lye tank to add alkali to the washing tower by using the main lye transfer pump when the main lye transfer pump is normally operated; otherwise, adding alkali into the washing tower by using a spare alkali liquor conveying pump.
8. The automatic alkalifying acid mist washing device of claim 1, wherein the liquid outlet of the main alkali liquid conveying pump and the liquid outlet of the spare alkali liquid conveying pump are connected with an electric overflow valve through a pipeline, the electric overflow valve is electrically connected with the control system, and when the electric overflow valve is larger than the first pressure threshold value, the electric overflow valve is opened, and alkali liquid flows back into the alkali liquid tank.
9. The automatic alkalizing acid mist washing apparatus according to claim 1, wherein a main hand ball valve is provided in front of and behind the main lye delivery pump, each main hand ball valve is provided with a main proximity switch, the main proximity switch is used for determining whether the main hand ball valve is opened, and the main lye delivery pump can only be operated when both the main hand ball valves are opened.
10. The automatic alkalizing acid mist washing apparatus according to claim 1, wherein a spare manual ball valve is provided before and after the spare lye delivery pump, each spare manual ball valve is provided with a spare proximity switch, the spare proximity switch is used for judging whether the spare manual ball valve is opened, and the spare lye delivery pump can only be operated when both spare manual ball valves are opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110535447.9A CN113262611A (en) | 2021-05-17 | 2021-05-17 | Automatic add acid mist washing equipment of alkali |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110535447.9A CN113262611A (en) | 2021-05-17 | 2021-05-17 | Automatic add acid mist washing equipment of alkali |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113262611A true CN113262611A (en) | 2021-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110535447.9A Pending CN113262611A (en) | 2021-05-17 | 2021-05-17 | Automatic add acid mist washing equipment of alkali |
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| CN (1) | CN113262611A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6214097B1 (en) * | 1994-11-08 | 2001-04-10 | Marsulex Environmental Technologies, Llc | Flue gas scrubbing apparatus |
| CN108246084A (en) * | 2018-02-12 | 2018-07-06 | 攀枝花市仁通钒业有限公司 | Rotary kiln exhaust gas processing system |
| CN109499288A (en) * | 2018-10-26 | 2019-03-22 | 四川天壹环保科技有限公司 | A kind of wet desulphurization automatic control system |
| CN109513323A (en) * | 2018-12-19 | 2019-03-26 | 伟明环保设备有限公司 | A kind of real-time monitoring for wet process depickling and energy-saving system and method |
| CN110302642A (en) * | 2019-06-26 | 2019-10-08 | 青岛双瑞海洋环境工程股份有限公司 | The control method of marine exhaust desulphurization system |
| CN110559833A (en) * | 2019-10-16 | 2019-12-13 | 苏州昇蓝环保科技有限公司 | Spray type acid mist purification tower |
| CN112774423A (en) * | 2021-02-22 | 2021-05-11 | 双盾环境科技有限公司 | Purification treatment process for flue gas generated after organic waste gas incineration |
-
2021
- 2021-05-17 CN CN202110535447.9A patent/CN113262611A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6214097B1 (en) * | 1994-11-08 | 2001-04-10 | Marsulex Environmental Technologies, Llc | Flue gas scrubbing apparatus |
| CN108246084A (en) * | 2018-02-12 | 2018-07-06 | 攀枝花市仁通钒业有限公司 | Rotary kiln exhaust gas processing system |
| CN109499288A (en) * | 2018-10-26 | 2019-03-22 | 四川天壹环保科技有限公司 | A kind of wet desulphurization automatic control system |
| CN109513323A (en) * | 2018-12-19 | 2019-03-26 | 伟明环保设备有限公司 | A kind of real-time monitoring for wet process depickling and energy-saving system and method |
| CN110302642A (en) * | 2019-06-26 | 2019-10-08 | 青岛双瑞海洋环境工程股份有限公司 | The control method of marine exhaust desulphurization system |
| CN110559833A (en) * | 2019-10-16 | 2019-12-13 | 苏州昇蓝环保科技有限公司 | Spray type acid mist purification tower |
| CN112774423A (en) * | 2021-02-22 | 2021-05-11 | 双盾环境科技有限公司 | Purification treatment process for flue gas generated after organic waste gas incineration |
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Application publication date: 20210817 |
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