CN213835548U - Energy-concerving and environment-protective type pickling circulation system - Google Patents
Energy-concerving and environment-protective type pickling circulation system Download PDFInfo
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- CN213835548U CN213835548U CN202022487697.3U CN202022487697U CN213835548U CN 213835548 U CN213835548 U CN 213835548U CN 202022487697 U CN202022487697 U CN 202022487697U CN 213835548 U CN213835548 U CN 213835548U
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Abstract
The utility model discloses an energy-concerving and environment-protective type pickling circulation system. Comprises an acid circulating tank, an acid inlet pipe, an acid outlet pipe, an acid pump, a basket filter, an acid inlet valve, a graphite heat exchanger, a return pipe, an overflow pipe, a liquid level meter, an acid concentration detector, an iron ion concentration detector and a waste liquid discharge pipe; the acid circulating tank is divided into a front-end acid circulating tank, a middle-end acid circulating tank and a rear-end acid circulating tank according to positions, an acid outlet pipe, a return pipe, a liquid level meter and an acid concentration detector are arranged on the acid circulating tank, the acid outlet pipe and the return pipe are respectively connected with an acid tank, and an acid pump, a basket filter, an acid inlet valve and a graphite heat exchanger are sequentially arranged on the acid outlet pipe; the rear-end acid circulating tank is connected with the acid inlet pipe, the front-end acid circulating tank is connected with the waste liquid discharge pipe, and an iron ion concentration detector is arranged in the front-end acid circulating tank; the front end acid circulating tank and the middle acid circulating tank and the rear end acid circulating tank are respectively connected through corresponding overflow pipes. The utility model discloses practiced thrift the resource, reduced manufacturing cost.
Description
The technical field is as follows:
the utility model belongs to the technical field of cold-rolled steel production, in particular to energy-concerving and environment-protective type pickling circulation system.
Background art:
in the production process of cold-rolled steel, a process called pickling is used, which is to wash the steel plate with acid liquor with a certain concentration to thoroughly clean the iron oxide scales on the surface of the steel plate.
Because each section of the on-line acid tank is provided with an independent acid circulating tank, after the acid is pickled for a period of time, the concentration of hydrochloric acid in the acid circulating tank is reduced, the concentration of iron ions is increased, and the strip steel cannot be pickled continuously and fully, so that the acid liquid in the acid circulating tank needs to be removed firstly, and then new acid needs to be supplemented.
Because the iron rust on the surface of the strip steel is serious in the first stage of the acid tank, the iron rust on the surface of the strip steel is lighter in the last stage of the acid tank, the concentration of the hydrochloric acid in each circulating tank is low in the first stage, and the concentration of the last stage is high, so that the last stage acid circulating tank is emptied when the newly-changed acid is not reached, a large amount of acid liquor is wasted, other energy sources are wasted, meanwhile, unnecessary burden is caused to an acid regeneration system, and the acid regeneration system is not environment-friendly and energy-saving.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
The utility model has the following contents:
the utility model aims at providing an energy-concerving and environment-protective type pickling circulation system to overcome the defect among the above-mentioned prior art.
In order to achieve the above object, the utility model provides an energy-concerving and environment-protective type pickling circulation system, include: the device comprises an acid circulating tank, an acid inlet pipe, an acid outlet pipe, an acid pump, a basket filter, an acid inlet valve, a graphite heat exchanger, a return pipe, an overflow pipe, a liquid level meter, an acid concentration detector, an iron ion concentration detector and a waste liquid discharge pipe; the acid circulating tank is divided into a front-end acid circulating tank, a middle-end acid circulating tank and a rear-end acid circulating tank according to positions, an acid outlet pipe, a return pipe, a liquid level meter and an acid concentration detector are arranged on the acid circulating tank, the acid outlet pipe and the return pipe are respectively connected with an acid tank, and an acid pump, a basket filter, an acid inlet valve and a graphite heat exchanger are sequentially arranged on the acid outlet pipe; the rear-end acid circulating tank is connected with the acid inlet pipe, the front-end acid circulating tank is connected with the waste liquid discharge pipe, and an iron ion concentration detector is arranged in the front-end acid circulating tank; the front end acid circulating tank and the middle acid circulating tank and the rear end acid circulating tank are respectively connected through corresponding overflow pipes.
Preferably, in the technical scheme, the energy-saving and environment-friendly acid washing circulating system further comprises an acid mist absorption main pipe, an acid mist absorption branch pipe and a washing tower, wherein the front end acid circulating tank, the middle acid circulating tank and the rear end acid circulating tank are respectively connected with the corresponding acid mist absorption branch pipe, the acid mist absorption branch pipe is connected with the acid mist absorption main pipe, and the acid mist absorption main pipe is connected with the washing tower.
Preferably, in the technical scheme, the energy-saving and environment-friendly acid washing circulation system further comprises a main sewage discharge pipe and a branch sewage discharge pipe, wherein the front-end acid circulation tank, the middle-end acid circulation tank and the rear-end acid circulation tank are respectively connected with the corresponding branch sewage discharge pipes, and the branch sewage discharge pipes are connected with the main sewage discharge pipe.
Compared with the prior art, the utility model discloses following beneficial effect has:
acid is supplemented in the acid circulating tanks at the rear end, and acid liquor overflows from the rear end to the front end among the acid circulating tanks, so that the emptying frequency of the acid circulating tanks is reduced, the utilization rate of the acid liquor is increased, the problem of high acid consumption in production is effectively solved, resources are saved, and the production cost is reduced.
Description of the drawings:
FIG. 1 is a schematic view of the energy-saving and environment-friendly pickling cycle system of the present invention;
the reference signs are: 1-acid circulation tank, 2-acid inlet pipe, 3-acid outlet pipe, 4-acid pump, 5-basket filter, 6-acid inlet valve, 7-graphite heat exchanger, 8-reflux pipe, 9-overflow pipe, 10-liquid level meter, 11-acid concentration detector, 12-iron ion concentration detector, 13-waste liquid discharge pipe, 14-acid mist absorption main pipe, 15-acid mist absorption branch pipe, 16-washing tower, 17-sewage discharge main pipe, 18-sewage discharge branch pipe, 19-front acid circulation tank, 20-middle acid circulation tank and 21-rear acid circulation tank.
The specific implementation mode is as follows:
the following detailed description of the embodiments of the present invention is provided, but it should be understood that the scope of the present invention is not limited by the embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Example 1
As shown in fig. 1, an energy-saving and environment-friendly acid washing circulation system comprises an acid circulation tank 1, an acid inlet pipe 2, an acid outlet pipe 3, an acid pump 4, a basket filter 5, an acid inlet valve 6, a graphite heat exchanger 7, a return pipe 8, an overflow pipe 9, a liquid level meter 10, an acid concentration detector 11, an iron ion concentration detector 12, a waste liquid discharge pipe 13, an acid mist absorption main pipe 14, an acid mist absorption branch pipe 15, a washing tower 16, a sewage discharge main pipe 17 and a sewage discharge branch pipe 18; the acid circulating tank 1 is divided into a front-end acid circulating tank 19, a middle-end acid circulating tank 20 and a rear-end acid circulating tank 21 according to positions, an acid outlet pipe 3, a return pipe 8, a liquid level meter 10 and an acid concentration detector 11 are arranged on the acid circulating tank 1, the acid outlet pipe 3 and the return pipe 8 are respectively connected with an acid tank, and an acid pump 4, a basket filter 5, an acid inlet valve 6 and a graphite heat exchanger 7 are sequentially arranged on the acid outlet pipe 3; the rear-end acid circulating tank 21 is connected with the acid inlet pipe 2, the front-end acid circulating tank 19 is connected with the waste liquid discharge pipe 13, and the iron ion concentration detector 12 is arranged in the front-end acid circulating tank 19; the front end acid circulating tank 19 and the middle acid circulating tank 20, and the middle acid circulating tank 20 and the rear end acid circulating tank 21 are respectively connected through corresponding overflow pipes 9. The front end acid circulating tank 19, the middle acid circulating tank 20 and the rear end acid circulating tank 21 are respectively connected with the corresponding acid mist absorption branch pipes 15, the acid mist absorption branch pipes 15 are connected with the acid mist absorption main pipe 14, and the acid mist absorption main pipe 14 is connected with the washing tower 16. The front end acid circulating tank 19, the middle acid circulating tank 20 and the rear end acid circulating tank 21 are respectively connected with the corresponding blow-down branch pipes 18, and the blow-down branch pipes 17 are connected with the blow-down main pipe 18.
Discharging the prepared fresh acid into a rear-end acid circulation tank 21 through an acid inlet pipe 2, starting an acid pump 4 after a liquid level meter 10 detects that the acid liquid reaches a set liquid level, enabling the acid liquid to enter an acid outlet pipe 3, enabling the acid liquid to pass through a basket filter 5, an acid inlet valve 6 and a graphite heat exchanger 7 in the acid outlet pipe 3, then sending the acid liquid to an online acid tank, spraying the acid liquid from acid spraying ports on two sides of the acid tank, enabling the acid liquid to reach the surface of strip steel, and reacting with iron rust on the surface; the reacted acid and rust mixed solution flows back to the rear-end acid circulation tank 21 through the return pipe 8, and a circulation process is completed.
When the concentration of the acid solution in the rear-end acid circulation tank 21 reaches 220g/L, the acid inlet pipe 2 starts to replenish new acid into the rear-end acid circulation tank 21, when the liquid level of the mixed acid solution in the rear-end acid circulation tank 21 reaches the overflow pipe 9, the mixed acid solution overflows to the middle-portion acid circulation tank 20 through the overflow pipe 9, and in the middle-portion acid circulation tank 20, the same circulation process as that of the rear-end acid circulation tank 21 is performed. When the concentration of the acid solution in the middle acid circulation tank 20 reaches 220g/L, the acid inlet pipe 2 continues to replenish new acid in the rear acid circulation tank 21, when the liquid level of the mixed acid solution in the middle acid circulation tank 20 reaches the overflow pipe 9, the mixed acid solution overflows to the front acid circulation tank 19 through the overflow pipe 9, and the same circulation process as that of the front two stages of acid circulation tanks is carried out in the front acid circulation tank 19. After the concentration of iron ions in the front-end acid circulation tank 19 reaches 120g/L, the waste liquid discharge pipe 13 is opened to discharge the waste liquid in the front-end acid circulation tank 19, and then acid liquid is replenished into the front-end acid circulation tank 19 from the middle acid circulation tank 20 through the overflow pipe 9. By supplementing acid in the rear-end acid circulating tank 21 and overflowing acid liquid from the rear end to the front end among the acid circulating tanks, the emptying frequency of the acid circulating tanks is reduced, the utilization rate of the acid solution is increased, the problem of high acid consumption in production is effectively solved, resources are saved, and the production cost is reduced.
While the acid liquor circulates, the acid mist in the acid circulation tank 1 is discharged into the acid mist absorption main pipe 14 through the acid mist absorption branch pipe 15, finally enters the acid mist washing tower 16, is sprayed by alkali liquor in the washing tower 16, neutralizes the acid mist, and is discharged into the atmosphere after absorption and purification.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (3)
1. An energy-saving environment-friendly pickling circulation system is characterized in that: comprises an acid circulating tank, an acid inlet pipe, an acid outlet pipe, an acid pump, a basket filter, an acid inlet valve, a graphite heat exchanger, a return pipe, an overflow pipe, a liquid level meter, an acid concentration detector, an iron ion concentration detector and a waste liquid discharge pipe; the acid circulating tank is divided into a front-end acid circulating tank, a middle-end acid circulating tank and a rear-end acid circulating tank according to positions, an acid outlet pipe, a return pipe, a liquid level meter and an acid concentration detector are arranged on the acid circulating tank, the acid outlet pipe and the return pipe are respectively connected with an acid tank, and an acid pump, a basket filter, an acid inlet valve and a graphite heat exchanger are sequentially arranged on the acid outlet pipe; the rear-end acid circulating tank is connected with the acid inlet pipe, the front-end acid circulating tank is connected with the waste liquid discharge pipe, and an iron ion concentration detector is arranged in the front-end acid circulating tank; the front end acid circulating tank and the middle acid circulating tank and the rear end acid circulating tank are respectively connected through corresponding overflow pipes.
2. The energy-saving and environment-friendly pickling cycle system of claim 1, wherein: the energy-saving environment-friendly acid washing circulating system also comprises an acid mist absorption main pipe, an acid mist absorption branch pipe and a washing tower, wherein the front end acid circulating tank, the middle acid circulating tank and the rear end acid circulating tank are respectively connected with the corresponding acid mist absorption branch pipes, the acid mist absorption branch pipe is connected with the acid mist absorption main pipe, and the acid mist absorption main pipe is connected with the washing tower.
3. The energy-saving and environment-friendly pickling cycle system of claim 1, wherein: the energy-saving environment-friendly pickling circulation system also comprises a main sewage discharge pipe and a branch sewage discharge pipe, wherein the front end acid circulation tank, the middle acid circulation tank and the rear end acid circulation tank are respectively connected with the corresponding branch sewage discharge pipes, and the branch sewage discharge pipes are connected with the main sewage discharge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022487697.3U CN213835548U (en) | 2020-11-02 | 2020-11-02 | Energy-concerving and environment-protective type pickling circulation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022487697.3U CN213835548U (en) | 2020-11-02 | 2020-11-02 | Energy-concerving and environment-protective type pickling circulation system |
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| CN213835548U true CN213835548U (en) | 2021-07-30 |
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| CN202022487697.3U Active CN213835548U (en) | 2020-11-02 | 2020-11-02 | Energy-concerving and environment-protective type pickling circulation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115636417A (en) * | 2022-10-31 | 2023-01-24 | 贺州市旭鑫矿产品加工有限责任公司 | Quartz acid pickling device |
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2020
- 2020-11-02 CN CN202022487697.3U patent/CN213835548U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115636417A (en) * | 2022-10-31 | 2023-01-24 | 贺州市旭鑫矿产品加工有限责任公司 | Quartz acid pickling device |
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