CN211871620U - Acid absorption effluent disposal system - Google Patents
Acid absorption effluent disposal system Download PDFInfo
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- CN211871620U CN211871620U CN201922027729.9U CN201922027729U CN211871620U CN 211871620 U CN211871620 U CN 211871620U CN 201922027729 U CN201922027729 U CN 201922027729U CN 211871620 U CN211871620 U CN 211871620U
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Abstract
The utility model provides an acid absorption wastewater treatment system, which comprises a wastewater supply unit and an acid absorption unit which are connected in sequence; the wastewater supply unit comprises a wastewater pool, a conveying device, a filtering device and a metering device which are connected in sequence according to the wastewater flow direction; the acid absorption unit comprises an acid liquor storage device, an acid liquor circulating device and an acid absorption device which are connected in a circulating mode according to the flow direction of the wastewater, and the acid absorption device is used for absorbing acid gas in the wastewater; the outlet of the metering device is connected with the inlet of the acid liquor storage device. The utility model provides an acid absorption effluent disposal system has utilized the acid absorption waste water that produces in the chlorothalonil production process effectively, absorbs the waste water with the acid and is used for carrying out the acid absorption with the chlorine-containing tail gas that the chlorothalonil production system produced after collecting, has not only handled the high-pollution acid-containing waste water effectively, but also can obtain high-value high concentration acidizing fluid.
Description
Technical Field
The utility model belongs to the technical field of pesticide production, a sour absorption effluent disposal system is related to, especially relate to a sour absorption effluent disposal system to chlorothalonil production line tail gas system.
Background
Tetrachloroisophthalonitrile, which is obtained by chlorinating isophthalonitrile in a fluidized bed, is the common name chlorothalonil, is a high-efficiency low-toxicity broad-spectrum bactericide and has the main function of preventing crops from being infected by fungi; and also can be used as industrial mildew preventive, fruit preservative, bactericide, coating and protective agent of adhesive. At present, the domestic chlorothalonil production tail gas treatment is summarized by the following processes:
(1) the iron filings are treated by chlorination process. Namely, the iron chips are soaked in a water chlorination tower, tail gas is introduced into the water chlorination tower to be absorbed, hydrogen chloride and chlorine are removed, and the standby water chlorination tower is replaced through periodic sampling analysis. The iron filings produced by said process are high in cost, the water chlorination tower is high in antiseptic treatment, maintenance and operation cost, and when the control is unstable, the chlorine gas is easy to leak, and pollutes environment, and has a certain labour intensity.
(2) The hydrogen chloride and chlorine in the tail gas are mostly treated by a sectional treatment mode, namely a water-alkali sectional absorption method is used for treating the chlorinated tail gas. That is, the tail gas passes through a falling film absorption tower, the hydrogen chloride is basically circularly absorbed by water, and then the lime water (also used dilute caustic soda solution) is used for absorbing residual chlorine. The process has the disadvantages of great input of quicklime (or caustic soda amount) and high cost, and recently, with the appearance of industrial novel environment-friendly bleaching agents (solutions such as hydrogen peroxide or chlorine dioxide) for papermaking, water treatment and the like, the markets of bleaching solutions and sodium hypochlorite solutions are gradually reduced, the prices are low, and even useless white water is discharged, so that the environmental pollution is caused, and the production waste is also caused.
(3) For plants with hydrogen sources, the process for synthesizing hydrochloric acid by burning chlorine and hydrogen in a combustion furnace is also available, but the catalyst in chlorothalonil production has short service cycle, a plurality of start-stop times, large tail gas flow fluctuation and difficult control of the combustion furnace, and cannot be implemented for plants without hydrogen sources.
In the production process of chlorothalonil, most of the redundant chlorine in the tail gas is absorbed by lime water to prepare the bleaching liquid for sale, so that the recovery effect is not ideal, the bleaching liquid has more slag slurry, serious environmental pollution and low price, the bleaching liquid is easy to decompose and is not suitable for long-time storage, and the bleaching liquid is sold in a certain region.
CN101961588A discloses a method for recovering chlorine from chlorothalonil chlorinated tail gas, which comprises the steps of inputting chlorothalonil chlorinated tail gas into a falling film absorption tower, circularly recovering all hydrogen chloride in the falling film absorption tower by adopting water, removing moisture and hydrochloric acid liquid drops at the initial stage by using silicon oil glass wool, deeply removing the rest moisture and hydrochloric acid liquid drops by using concentrated sulfuric acid, and finally adsorbing chlorine by using a carbon molecular sieve, thereby separating nitrogen and discharging the nitrogen into the atmosphere, and desorbing, pressurizing and recycling the adsorbed chlorine in a desorption tower to the system again for utilization.
The production link of chlorothalonil must meet the relevant environmental protection requirements in terms of environmental protection, and requires no polluted water and no polluted waste gas. The conventional chlorothalonil production process is mainly a gas reaction process, partial residual gas still needs to be further absorbed after the reaction is finished, the acid liquor concentration needs to be analyzed in the process of absorbing and treating hydrogen chloride gas by using water, equipment is in fault and needs to be maintained and repaired, so that a small amount of residual liquid exists, the residual liquid needs to be diluted by using clean water on site, and a part of waste water exists, so that an acid absorption waste water treatment system needs to be designed to recycle the part of waste water.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an acid absorption effluent disposal system, the utility model provides an acid absorption effluent disposal system has utilized the acid absorption waste water that produces in the chlorothalonil production process effectively, is used for absorbing the hydrogen chloride gas in the chlorine-containing tail gas that chlorothalonil production system produced after collecting the acid absorption waste water.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an acid absorption effluent disposal system, acid absorption effluent disposal system including the waste water supply unit and the acid absorption unit that connect gradually.
The acid absorption unit comprises an acid liquor storage device, an acid liquor circulating device and an acid absorption device which are connected in a circulating mode according to the flow direction of the wastewater, and the acid absorption device is used for absorbing acid gas in the wastewater.
The wastewater supply unit comprises a wastewater pool, a conveying device, a filtering device and a metering device which are connected in sequence according to the wastewater flow direction.
The outlet of the metering device is connected with the inlet of the acid liquor storage device.
The utility model provides an acid absorption effluent disposal system has effectively utilized the acid absorption waste water that produces in the chlorothalonil production process, absorbs the hydrogen chloride gas in the chlorine-containing tail gas that waste water was collected the back and is used for absorbing chlorothalonil production system and produce with acid.
It should be noted that, the utility model provides an acid absorption effluent disposal system mainly cooperates the clear production system of chlorothalonil to use, as the low reaches processing unit of the clear production system of chlorothalonil, collects the utilization to the acid absorption waste water that the upper reaches production system produced for acid absorption waste water can not arrange outward or the seepage leads to water pollution or soil pollution, moreover, can also obtain the acid-containing waste liquid of high value, possesses good application prospect. However, the acid absorption wastewater treatment system provided by the utility model is not limited to the downstream treatment unit of the chlorothalonil production system, and can be used in other chemical fields with slight improvement, therefore, the utility model discloses it is right the application scenario of acid absorption wastewater treatment system do not make special requirements and special restrictions, and the technicians in this field can suitably adjust with the application scenario or the treatment object according to the difference.
As an optimized technical proposal of the utility model, the acid liquor circulating device is a circulating pump.
As a preferred technical scheme of the utility model, the acid absorbing device be falling film absorber.
As an optimized technical proposal of the utility model, the wastewater disposal basin is a ground-sinking type water basin.
The conveying device is a corrosion-resistant self-sucking pump.
The metering device is a metering tank.
As an optimized technical scheme, the acid absorption wastewater treatment system still include the drainage channel with the effluent disposal basin intercommunication, the drainage channel be used for collecting the waste water of production site and introduce the effluent disposal basin with waste water.
As an optimized technical proposal of the utility model, the metering device is connected with the acid liquor storage device through a conveying pipeline.
The conveying pipeline is sequentially provided with a first valve, a pneumatic valve and a second valve along the wastewater flow direction.
The first valve and the second valve are ball valves.
The utility model discloses in, set up the aim at of first valve and second valve, in case the pneumatic valve breaks down when needing to overhaul, through the first valve and the second valve that close both ends, block the waste water that flows into the pneumatic valve to dismantle the pneumatic valve from the pipeline.
As an optimal technical scheme of the utility model, conveying pipeline's both ends parallelly connected manual regulation branch road.
And a third valve is arranged on the manual adjusting branch.
The third valve is a manual ball valve.
The utility model discloses in, set up the aim at of manual regulation branch road, in case the pneumatic valve breaks down unable normal operation, can close first valve earlier, open the third valve, switch into manual control through the manual regulation branch road.
As a preferred technical scheme of the utility model, the acid absorption wastewater treatment system still include with pneumatic valve electric connection's control module.
As an optimal technical scheme, acidizing fluid storage device inside set up low liquid level detection device, low liquid level detection device be connected with the control module feedback, when the waste water liquid level in the acidizing fluid storage device reachs low liquid level detection device, low liquid level detection device send feedback signal to control module, control module receives feedback signal back control pneumatic valve and opens.
As an optimal technical scheme, acidizing fluid storage device inside set up high liquid level detection device, high liquid level detection device be connected with the control module feedback, when the high liquid level detection device is reachd to the waste water liquid level in the acidizing fluid storage device, high liquid level detection device send feedback signal to control module, control module receives feedback signal back control pneumatic valve and closes.
The utility model provides an acid absorption effluent disposal system mainly carries out the acid absorption to chlorothalonil production technology, has utilized the acid-containing waste water that produces in the chlorothalonil production technology to carry out falling liquid film absorption to the chlorine-containing tail gas that chlorothalonil production system discharged, has not only handled the acid-containing waste water of high pollution effectively, but also can obtain high-concentration acidizing fluid of high value, and specific processing procedure includes following step:
acid-containing wastewater generated in an acid absorption process in a chlorothalonil production system is collected by a drainage channel and then is introduced into a wastewater pool, acid absorption wastewater in the wastewater pool is pumped into a filtering device by a conveying device, impurities in the wastewater are filtered out and then the wastewater is introduced into a metering device for temporary storage;
(II) keeping the third valve closed in the normal operation process of the system, opening the first valve, the pneumatic valve and the second valve to realize automatic liquid supplementation of the acid-containing wastewater, and manually opening the third valve to adjust the third valve to manually control liquid supplementation when the pneumatic valve has an operation fault;
(III) enabling the wastewater in the metering device to enter an acid liquid storage device and be pumped into an acid absorption device by an acid liquid circulating device to carry out falling film absorption on hydrogen chloride gas in chlorine-containing tail gas generated by a chlorothalonil production system, enabling the high-concentration acid-containing wastewater obtained after acid absorption to enter the acid liquid storage device, then enabling the high-concentration acid-containing wastewater to be pumped into the acid absorption device by the acid liquid circulating device, and discharging the high-concentration acid-containing wastewater after the high-concentration acid-containing wastewater is circularly absorbed until the acid liquid concentration meets the requirements;
(IV) in the whole cyclic absorption process, the high liquid level detection device and the low liquid level detection device respectively monitor the liquid level in the acid liquid storage device, when the liquid level of the wastewater in the acid liquid storage device reaches the low liquid level detection device, the low liquid level detection device sends a feedback signal to the control module, the control module controls the pneumatic valve to be opened after receiving the feedback signal, and at the moment, new low-concentration acid-containing wastewater is supplemented into the acid liquid storage device; when the liquid level of the wastewater in the acid liquor storage device reaches the high liquid level detection device, the high liquid level detection device sends a feedback signal to the control module, and the control module controls the pneumatic valve to be closed after receiving the feedback signal.
The system refers to an equipment system, or a production equipment.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides an acid absorption effluent disposal system has utilized the acid absorption waste water that produces in the chlorothalonil production process effectively, absorbs the waste water with the acid and is used for carrying out the acid absorption with the chlorine-containing tail gas that the chlorothalonil production system produced after collecting, has not only handled the high-pollution acid-containing waste water effectively, but also can obtain high-value high concentration acidizing fluid.
Drawings
FIG. 1 is a schematic structural view of an acid absorption wastewater treatment system according to an embodiment of the present invention;
wherein, 1-a drainage channel; 2-a wastewater tank; 3-a conveying device; 4-a filtration device; 5-a metering device; 6-an acid liquor storage device; 7-high liquid level detection means; 8-low level detection means; a 9-acid absorption unit; 10-a first valve; 11 — pneumatic valves; 12-a second valve; 13-third valve.
Detailed Description
It is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features being indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The specific embodiment provides an acid absorption wastewater treatment system, which comprises a wastewater supply unit and an acid absorption unit which are connected in sequence.
Waste water supply unit is according to the waste water flow to including the wastewater disposal basin 2, conveyor 3, filter equipment 4 and the metering device 5 that connect gradually, and wastewater disposal basin 2 is the formula pond that sinks on ground, and conveyor 3 is corrosion resistant self priming pump, and metering device 5 is the metering tank.
The acid absorption unit comprises an acid liquor storage device 6, an acid liquor circulating device and an acid absorption device 9 which are circularly connected according to the flow direction of the wastewater, wherein the acid absorption device 9 is used for absorbing acid gas in the wastewater. The outlet of the metering device 5 is connected with the inlet of the acid liquid storage device 6. The acid liquor circulating device is a circulating pump, and the acid absorbing device 9 is a falling film absorber.
The acid absorption wastewater treatment system further comprises a drainage channel 1 communicated with the wastewater tank 2, wherein the drainage channel 1 is used for collecting wastewater in a production site and introducing the wastewater into the wastewater tank 2.
The metering device 5 is connected with the acid liquor storage device 6 through a conveying pipeline, a first valve 10, a pneumatic valve 11 and a second valve 12 are sequentially arranged on the conveying pipeline along the wastewater flow direction, and the first valve 10 and the second valve 12 are ball valves. Two ends of the conveying pipeline are connected with a manual adjusting branch in parallel, a third valve 13 is arranged on the manual adjusting branch, and the third valve 13 is a manual ball valve.
The acid absorption wastewater treatment system also comprises a control module electrically connected with the pneumatic valve. A low liquid level detection device 8 and a high liquid level detection device 7 are arranged in the acid liquid storage device 6, the low liquid level detection device 8 and the high liquid level detection device 7 are respectively and independently connected with the control module in a feedback mode, when the liquid level of wastewater in the acid liquid storage device 6 reaches the low liquid level detection device 8, the low liquid level detection device 8 sends a feedback signal to the control module, and the control module controls the pneumatic valve 11 to be opened after receiving the feedback signal; when the wastewater liquid level in the acid liquor storage device 6 reaches the high liquid level detection device 7, the high liquid level detection device 7 sends a feedback signal to the control module, and the control module controls the pneumatic valve 11 to be closed after receiving the feedback signal.
The operation process of the acid absorption wastewater treatment system provided by the embodiment comprises the following steps:
acid-containing wastewater generated in an acid absorption process in a chlorothalonil production system is collected by a drainage channel 1 and then is introduced into a wastewater pool 2, acid absorption wastewater in the wastewater pool 2 is pumped into a filtering device 4 by a conveying device 3, impurities in the wastewater are filtered out and then the wastewater is introduced into a metering device 5 for temporary storage;
(II) in the normal operation process of the system, the third valve 13 is kept closed, the first valve 10, the pneumatic valve 11 and the second valve 12 are opened to realize automatic liquid supplementing of the acid-containing wastewater, and when the pneumatic valve 11 has an operation fault, the third valve 13 can be manually opened to adjust the operation fault to be manually controlled to supplement the liquid;
(III) the wastewater in the metering device 5 enters an acid liquid storage device 6 and is pumped into an acid absorption device 9 by an acid liquid circulating device to carry out falling film absorption on hydrogen chloride gas in chlorine-containing tail gas generated by a chlorothalonil production system, the high-concentration acid-containing wastewater obtained after acid absorption enters the acid liquid storage device 6 and is pumped into the acid absorption device 9 by the acid liquid circulating device, and the high-concentration acid-containing wastewater is discharged after being circularly absorbed until the acid liquid concentration meeting the requirements of customers is reached;
(IV) in the whole cyclic absorption process, the high liquid level detection device 7 and the low liquid level detection device 8 respectively monitor the liquid level in the acid liquid storage device 6, when the liquid level of the wastewater in the acid liquid storage device 6 reaches the low liquid level detection device 8, the low liquid level detection device 8 sends a feedback signal to the control module, the control module receives the feedback signal and then controls the pneumatic valve 11 to be opened, and at the moment, new low-concentration acid-containing wastewater is supplemented into the acid liquid storage device 6; when the wastewater liquid level in the acid liquor storage device 6 reaches the high liquid level detection device 7, the high liquid level detection device 7 sends a feedback signal to the control module, and the control module controls the pneumatic valve 11 to be closed after receiving the feedback signal.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. An acid absorption wastewater treatment system is characterized by comprising a wastewater supply unit and an acid absorption unit which are connected in sequence;
the wastewater supply unit comprises a wastewater pool, a conveying device, a filtering device and a metering device which are connected in sequence according to the wastewater flow direction;
the acid absorption unit comprises an acid liquor storage device, an acid liquor circulating device and an acid absorption device which are connected in a circulating mode according to the flow direction of the wastewater, and the acid absorption device is used for absorbing acid gas in the wastewater;
the outlet of the metering device is connected with the inlet of the acid liquor storage device.
2. The acid absorption wastewater treatment system as claimed in claim 1, wherein said acid circulation device is a circulation pump.
3. The acid absorption wastewater treatment system according to claim 2, wherein said acid absorption unit is a falling film absorber.
4. The acid absorption wastewater treatment system according to claim 3, wherein said wastewater basin is a ground-sinking basin;
the conveying device is a corrosion-resistant self-sucking pump;
the metering device is a metering tank.
5. The acid absorption wastewater treatment system according to claim 4 further comprising a drainage channel in communication with the wastewater basin, said drainage channel for collecting wastewater at the production site and directing the wastewater to the wastewater basin.
6. The acid absorption wastewater treatment system according to claim 5, wherein said metering device is connected to said acid storage device via a transfer line;
a first valve, a pneumatic valve and a second valve are sequentially arranged on the conveying pipeline along the wastewater flow direction;
the first valve and the second valve are ball valves.
7. The acid absorption wastewater treatment system according to claim 6, wherein both ends of said transfer line are connected in parallel with a manual adjustment branch;
a third valve is arranged on the manual adjusting branch;
the third valve is a manual ball valve.
8. The acid absorption wastewater treatment system according to claim 7, further comprising a control module electrically connected to said pneumatic valve.
9. The acid absorption wastewater treatment system according to claim 8, wherein a low liquid level detection device is disposed inside the acid storage device, the low liquid level detection device is connected with the control module in a feedback manner, when the wastewater liquid level in the acid storage device reaches the low liquid level detection device, the low liquid level detection device sends a feedback signal to the control module, and the control module controls the pneumatic valve to open after receiving the feedback signal.
10. The acid absorption wastewater treatment system according to claim 9, wherein a high liquid level detection device is disposed inside the acid storage device, the high liquid level detection device is connected with the control module in a feedback manner, when the wastewater liquid level in the acid storage device reaches the high liquid level detection device, the high liquid level detection device sends a feedback signal to the control module, and the control module controls the pneumatic valve to be closed after receiving the feedback signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922027729.9U CN211871620U (en) | 2019-11-21 | 2019-11-21 | Acid absorption effluent disposal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922027729.9U CN211871620U (en) | 2019-11-21 | 2019-11-21 | Acid absorption effluent disposal system |
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| Publication Number | Publication Date |
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| CN211871620U true CN211871620U (en) | 2020-11-06 |
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| CN201922027729.9U Active CN211871620U (en) | 2019-11-21 | 2019-11-21 | Acid absorption effluent disposal system |
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| CN (1) | CN211871620U (en) |
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