CN216514158U - Equipment for reducing cold rolling acid liquor consumption - Google Patents
Equipment for reducing cold rolling acid liquor consumption Download PDFInfo
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- CN216514158U CN216514158U CN202122328881.8U CN202122328881U CN216514158U CN 216514158 U CN216514158 U CN 216514158U CN 202122328881 U CN202122328881 U CN 202122328881U CN 216514158 U CN216514158 U CN 216514158U
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Abstract
According to the equipment for reducing the consumption of the acid liquor in the cold rolling, the acid tank at the tail section and the pre-rinsing tank are integrated, the pre-rinsing water and the acid liquor thrown out by the squeezing roller can be directly recycled, and the acid consumption per ton of steel can be greatly reduced under the condition that an acid regeneration station exists; and the low-concentration rinsing wastewater is collected into the acid mist purification system for purifying and absorbing acid mist, and the generated wastewater is directly discharged to the wastewater treatment station, so that the transfer from the acid regeneration station is avoided, and the water consumption for absorbing the acid mist is reduced.
Description
Technical Field
The utility model relates to the technical field of strip steel pickling, in particular to equipment for reducing cold rolling acid liquor consumption.
Background
The method is characterized in that the iron scale on the surface of the strip steel needs to be removed completely by acid washing before cold rolling, and the surface of the strip steel needs to be rinsed in multiple stages after the acid washing is finished, so that the acid liquor residue on the surface of the strip steel is completely removed, and the surface of the dried strip steel is prevented from rusting. The prior process of pickling and rinsing the strip steel is shown in figure 1.
After the acid washing of the continuously running strip 14 'in the tail-end acid tank 3' is finished, the strip is squeezed by the squeezing roller 4 ', most acid liquor on the surface of the strip 14' falls into the acid tank 3 ', then the surface of the strip 14' is pre-rinsed by the pre-rinsing spray pipe 6 ', pre-rinsing water comes from the first-stage rinsing tank 8', the pre-rinsing water falls into the pre-rinsing tank 7 ', then flows into the rinsing wastewater tank 12' in a gravity flow mode, and the rinsing wastewater pump 13 'periodically discharges the wastewater collected in the rinsing wastewater tank 12' to the acid regeneration station for partial recycling. After the pre-rinse, the strip 14 'enters the first stage rinse tank 8' for further rinsing until it passes through the final stage rinse tank. Fresh water is continuously supplemented to the final-stage rinsing tank at a certain flow rate, and the rinsing water in each stage of rinsing tank is dynamically updated step by the aid of the cascade flow 11 ', the cascade flow 11' finally enters the pre-rinsing tank 7 'and flows into the rinsing wastewater tank 12' in a gravity flow mode, and the rinsing wastewater pump 13 'periodically discharges the wastewater collected in the rinsing wastewater tank 12' to the acid regeneration station for recycling of an acid regeneration part.
In the strip acid washing and rinsing process, the pre-rinsing wastewater with high acid content and the rinsing wastewater of the cascade flow are sent to an acid regeneration station for partial recycling, but with the improvement of the acid regeneration process, the rinsing wastewater which is almost not required to be supplied by a consuming unit is developed, and the rinsing wastewater is directly discharged to a wastewater treatment station, so that the loss of acid liquor in the rinsing wastewater is caused. When the strip goes out of the tail-section acid tank, in the squeezing process, the squeezing roller can directly throw part of high-concentration acid liquor into the pre-rinsing tank in the high-speed rotation process, and the loss of the acid liquor can also be caused. Because the first-stage rinsing water with poor water quality is adopted in the pre-rinsing, and the pressure of the first-stage rinsing water is not high, high-concentration acid liquor on the surface of the strip cannot be removed in a large amount in the first time and is brought into a subsequent rinsing tank, and the dynamic water replenishing amount for maintaining the water quality in each stage of rinsing tank is large.
With the continuous enhancement of the requirements of industrial energy conservation and consumption reduction and the increasing demand of various production enterprises on reducing the energy consumption of ton steel, the development of equipment capable of reducing the acid liquor consumption has wide market prospect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide equipment for reducing the consumption of cold rolling acid liquor so as to reduce the acid consumption in the strip steel acid pickling process.
The specific scheme is as follows:
a device for reducing consumption of cold rolling acid liquor comprises a multi-section pickling tank and a multi-section rinsing tank which are sequentially arranged along the advancing direction of a strip, wherein a wringing roller and a pre-rinsing spray pipe positioned at the rear section of the wringing roller are arranged in the tail section acid tank of the multi-section pickling tank, a spray head for washing the front side and the back side of the strip is arranged on the pre-rinsing spray pipe, the pre-rinsing spray pipe is connected with a high-pressure pump, the tail section acid tank is connected with an acid tank through a pipeline, and the acid tank pumps pickling liquor into the tail section acid tank through an acid pump; be provided with first order rinsing spray tube in the first order potcher of multistage potcher, be provided with the shower nozzle that carries out the one-level rinsing on the first order rinsing spray tube to the strip tow sides, the rinsing liquid in the first order potcher is connected with first order rinsing spray tube through first order rinsing circulating pump, the first order potcher still is connected with the acid mist purifying tower, the acid mist purifying tower is connected with the waste water treatment station.
Furthermore, the first-stage rinsing tank is provided with an overflow pipeline, and rinsing water in the first-stage rinsing tank flows into the acid mist purification tower through the overflow pipeline.
Furthermore, the multi-section potcher is a multi-stage ladder flow potcher.
Compared with the prior art, the equipment for reducing the consumption of the cold rolling acid liquor has the following advantages:
1. the tail-end acid tank and the pre-rinsing tank in the prior art are integrated, so that pre-rinsing water and acid liquor thrown out by a squeezing roller can be directly recycled, and the consumption of ton steel acid can be greatly reduced under the condition that an acid regeneration station exists;
2. by adopting a special high-pressure pre-rinsing technology, high-concentration acid liquor on the surface of the strip can be removed to the greatest extent, more acid liquor can be recycled, and the consumption of new water in a subsequent rinsing section can be reduced;
3. the flow and the concentration of the regenerated acid supplemented into the acid tank are dynamically adjusted by utilizing the acid water material balance, so that the concentration of the acid tank can be kept stable under the condition of continuously collecting the pre-rinsing water;
4. the low-concentration rinsing wastewater is firstly discharged to the acid mist purification tower for secondary utilization, and finally generated acid-containing wastewater is directly discharged to the wastewater treatment station, so that the new water consumption of the acid mist purification tower is reduced, the transfer of the rinsing wastewater from the acid regeneration station is avoided, and the energy consumption is reduced.
Drawings
Fig. 1 shows a schematic diagram of a prior art pickling and rinsing plant for steel strip.
Fig. 2 shows a schematic diagram of a pickling and rinsing plant for steel strip according to the utility model.
Detailed Description
To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The utility model will now be further described with reference to the accompanying drawings and detailed description.
The utility model provides equipment for reducing consumption of cold rolling acid liquor, wherein as shown in figure 2, the equipment comprises an acid tank 1, an acid pump 2, a tail-end acid tank 3, a wringing roller 4, a regenerated acid supplementing pipeline 5, a pre-rinsing spray pipe 6, a first-stage rinsing tank 8, a first-stage rinsing spray pipe 9, a first-stage rinsing circulating pump 10, gradient rinsing water 11, an acid mist purification tower 12, a waste water pump 13, a strip 14, a high-pressure pump 15 and an overflow pipeline 16.
The final-stage acid tank 3 and the multistage rinsing tanks are arranged in sequence along the traveling direction of the strip 14, and the rinsing water in the multistage rinsing tanks flows from the rear stage to the front stage in the manner of a cascade 11.
The end section acid tank 3 is internally provided with a wringing roller 4 and a pre-rinsing spray pipe 6 positioned at the rear section of the wringing roller 4, the pre-rinsing spray pipe 6 is provided with a spray head for pre-rinsing the front and back surfaces of a strip 14, the pre-rinsing spray pipe 6 is connected with a high-pressure pump 15, the high-pressure pump 15 conveys rinsing water to the pre-rinsing spray pipe 6 and sprays out of the spray head on the pre-rinsing spray pipe 6 so as to pre-rinse the strip 14 after the strip passes through the wringing roller 4 to wring a pickling solution, the end section acid tank 3 is connected with the acid tank 1 through a pipeline, and the pickling solution of the acid tank 1 can be pumped into the end section acid tank 3 through the acid pump 2 to realize the recycling of the pickling solution.
Be provided with first order rinsing spray tube 9 in the first order potcher 8 of multistage potcher, be provided with the shower nozzle that carries out the one-level rinsing to strip 14 positive and negative two sides on the first order rinsing spray tube 9, the rinsing liquid in the first order potcher 8 is connected with first order rinsing spray tube 9 through first order rinsing circulating pump 10, realizes that the rinsing liquid in the first order potcher 8 recycles.
The first-stage rinsing tank 8 is also connected with an acid mist purification tower 12, the rinsing liquid treated by the acid mist purification tower 12 is conveyed to a wastewater treatment station through a wastewater pump 13 for treatment, and the regenerated acid treated by the acid regeneration station is connected with the acid tank 1 through a regenerated acid supplement pipeline 5. First-stage rinse tank 8 is provided with overflow line 16, and the rinse water of ladder flow 11 finally continuously flows into acid mist purification tower 12 through overflow line 16.
The strip is processed in the apparatus as follows:
after the pickling of the continuously running strip 14 in the tail-end acid tank 3 is finished, most of high-concentration acid liquor on the surface is removed by squeezing through the squeezing roller 4, and solid cone and fan-shaped high-speed jet impact is sprayed out through the pre-rinsing spray pipe 6, so that the acid liquor residue on the surface is reduced to the minimum level. In the process, the acid liquid squeezed off by the squeezing roller 4, the acid liquid thrown out by the squeezing roller 4 through high-speed rotation and the acid liquid washed off from the surface of the strip 14 by the pre-rinsing spray pipe 6 all fall into the tail-end acid tank 3, then flow back into the acid tank 1 in a gravity flow mode, are mixed with the acid liquid in the acid tank 1, are pumped out by the acid pump 2 and are injected into the tail-end acid tank 3 again to carry out acid washing on the strip 14, and the circulation is repeated.
Rinsing water sprayed from the pre-rinsing spray pipe 6 is continuously injected into the acid tank 1 to dilute the acid liquid concentration in the acid tank 1, and in order to control the original acid liquid concentration, the flow and the concentration of the regenerated acid added into the acid tank 1 through the regenerated acid supplementing pipeline 5 are dynamically adjusted according to the material balance.
Rinse water used by the pre-rinsing spray pipe 6 is pressurized by the high-pressure pump 15 and then is converted into high-speed jet flow by the nozzle on the pre-rinsing spray pipe 6 to wash the surface of the strip 14, so that high-concentration acid liquor on the surface of the strip 14 is removed before the strip 14 enters the first-stage rinsing tank 8 to the greatest extent, the subsequent rinsing load is reduced, and the supplement amount of new water is saved; the strip 14 then enters a subsequent first-stage rinsing tank 8, the surface of the strip 14 is rinsed by the first-stage rinsing spray pipe 9, and after rinsing water falls into the first-stage rinsing tank 8, the rinsing water is pumped out and pressurized by the first-stage rinsing circulating pump 10, and then the surface of the strip 14 is rinsed again by the first-stage rinsing spray pipe 9, and the rinsing water is circulated until the strip 14 exits the last-stage rinsing tank.
In the rinsing process, the residual low-concentration acid liquor on the surface of the running strip 14 is continuously washed away, the acid content of each level of rinsing water is slowly increased, in order to maintain the water quality of the rinsing water in a reasonable interval, new water is continuously supplemented to the last level of rinsing tank at a certain flow rate, and the rinsing water is gradually advanced in a cascade mode, so that the dynamic update of the water quality of the rinsing water in each level of rinsing tank is realized. The first-stage rinsing tank 8 is provided with an overflow pipeline 16, the rinsing water of the ladder flow 11 finally continuously flows into the acid mist purification tower 12 through the overflow pipeline 16, and acid-containing wastewater generated after acid mist is absorbed in the tower in a circulating manner is periodically discharged to a wastewater treatment station through a wastewater pump 13 for treatment.
The equipment for reducing the consumption of the cold rolling acid liquor has the following advantages:
1. the tail-end acid tank and the pre-rinsing tank in the prior art are integrated, so that pre-rinsing water and acid liquor thrown out by a squeezing roller can be directly recycled, and the consumption of ton steel acid can be greatly reduced under the condition that an acid regeneration station exists;
2. by adopting a high-pressure pre-rinsing technology, high-concentration acid liquor on the surface of the strip can be removed to the greatest extent, more acid liquor can be recycled, and the consumption of new water in a subsequent rinsing section can be reduced;
3. the flow and the concentration of the regenerated acid supplemented into the acid tank are dynamically adjusted by utilizing the acid water material balance, so that the concentration of the acid tank can be kept stable under the condition of continuously collecting the pre-rinsing water;
4. the low-concentration rinsing wastewater is firstly discharged to the acid mist purification tower for secondary utilization, and finally generated acid-containing wastewater is directly discharged to the wastewater treatment station, so that the new water consumption of the acid mist purification tower is reduced, the transfer of the rinsing wastewater from the acid regeneration station is avoided, and the energy consumption is reduced.
While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (2)
1. The utility model provides a reduce equipment of cold rolling acidizing fluid consumption, includes multistage descaling bath and the multistage potcher that sets gradually along strip advancing direction, its characterized in that: a wringing roller and a pre-rinsing spray pipe positioned at the rear section of the wringing roller are arranged in the tail-section acid tank of the multi-section acid tank, spray heads for washing the front and the back of a strip are arranged on the pre-rinsing spray pipe, the pre-rinsing spray pipe is connected with a high-pressure pump, the tail-section acid tank is connected with an acid tank through a pipeline, and the acid tank pumps pickling solution into the tail-section acid tank through an acid pump; the multistage potcher is multistage ladder flow potcher, be provided with first order rinsing spray tube in the first order potcher of multistage ladder flow potcher, be provided with the shower nozzle that carries out the one-level rinsing to the positive and negative two sides of strip on the first order rinsing spray tube, rinsing liquid in the first order potcher is connected with first order rinsing spray tube through first order rinsing circulating pump, the first order potcher still is connected with the acid mist purifying column, the acid mist purifying column is connected with the waste water treatment station.
2. The apparatus of claim 1, wherein: the first-stage rinsing tank is provided with an overflow pipeline, and rinsing water in the first-stage rinsing tank flows into the acid mist purification tower through the overflow pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122328881.8U CN216514158U (en) | 2021-09-24 | 2021-09-24 | Equipment for reducing cold rolling acid liquor consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122328881.8U CN216514158U (en) | 2021-09-24 | 2021-09-24 | Equipment for reducing cold rolling acid liquor consumption |
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| Publication Number | Publication Date |
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| CN216514158U true CN216514158U (en) | 2022-05-13 |
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| CN202122328881.8U Active CN216514158U (en) | 2021-09-24 | 2021-09-24 | Equipment for reducing cold rolling acid liquor consumption |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774397A (en) * | 2021-09-24 | 2021-12-10 | 中冶南方工程技术有限公司 | Process and equipment for reducing consumption of cold rolling acid liquor |
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2021
- 2021-09-24 CN CN202122328881.8U patent/CN216514158U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113774397A (en) * | 2021-09-24 | 2021-12-10 | 中冶南方工程技术有限公司 | Process and equipment for reducing consumption of cold rolling acid liquor |
| CN113774397B (en) * | 2021-09-24 | 2024-07-23 | 中冶南方工程技术有限公司 | Process and equipment for reducing consumption of cold-rolled acid liquor |
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