CN211921709U - Strip steel continuous hydrochloric acid washing device for realizing acid tank liquid level balance - Google Patents
Strip steel continuous hydrochloric acid washing device for realizing acid tank liquid level balance Download PDFInfo
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- CN211921709U CN211921709U CN202020358341.7U CN202020358341U CN211921709U CN 211921709 U CN211921709 U CN 211921709U CN 202020358341 U CN202020358341 U CN 202020358341U CN 211921709 U CN211921709 U CN 211921709U
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Abstract
The utility model discloses a strip steel continuous hydrochloric acid washing device for realizing the liquid level balance of an acid tank, which comprises three pickling tanks, three acid tanks, a pickling tank partition wall, an overflow groove and a drying roll; an overflow acid return pipe is arranged between the bottom of the overflow tank and the top of the acid tank; connect between acid tank and the descaling bath and go up the sour pipe, go up and set up the acid pump on the sour pipe, the descaling bath bottom all sets up self-loopa heating circuit, sets up an acidizing fluid compensating pipe between the acid pump outlet end of the last sour pipe of a descaling bath and the suction end of the self-loopa heating circuit of another descaling bath all concatenates a compensation governing valve on the acidizing fluid compensating pipe, all set up the level gauge on the acid tank, level gauge and compensation governing valve are connected with the computer respectively, form closed-loop control, realize the automatic control of acidizing fluid compensation adjustment. The utility model discloses overcome the unsmooth acid tank liquid level that causes of acid tank communicating pipe intercommunication unbalanced, the adjustable acidizing fluid compensation flow of compensation governing valve for the acid tank liquid level changes in the control.
Description
Technical Field
The utility model relates to a hot rolling belted steel washes device with hydrochloric acid in succession, concretely relates to realize the belted steel of acid tank liquid level balance washes device with hydrochloric acid in succession.
Background
At present, large-scale cold-rolled strip steel production at home and abroad adopts a shallow-slot continuous hydrochloric acid washing device as shown in figure 1 to remove the iron scale of a hot-rolled raw material. During production, acid liquor in each acid tank is pumped into each corresponding acid tank through an acid feeding pipe by an acid pump, the acid tanks overflow to an overflow groove after full flow, and return to each acid tank through an overflow acid return pipe, so that small circulation of the acid liquor in the tanks is realized, and the acid liquor concentration in each tank is consistent with that in the corresponding tank. High-concentration regenerated acid is sent to a 3# acid tank from an acid regeneration station, the 3# acid tank overflows to a 2# tank through an acid tank communicating pipe, the 2# tank acid overflows to a 1# tank, and the 1# tank acid arrives at the acid regeneration station, so that the large circulation of acid liquor is realized. Because the advancing direction of the strip steel pickling is opposite to the large circulation direction of the acid liquor, under the action of large circulation and small circulation, the acid concentration of the 1# pickling tank and the 1# tank is lowest, the iron concentration is highest, the acid concentration of the 3# pickling tank and the 3# tank is highest, the iron concentration is lowest, according to the process requirement, the iron concentration of the 1# pickling tank is less than or equal to 130g/l, and the free acid concentration is more than or equal to 30 g/l; the concentration of the 2# channel iron is less than or equal to 100g/l, and the concentration of free acid is more than or equal to 69 g/l; in the production of the No. 3 bath with iron concentration less than or equal to 70g/l and free acid concentration greater than or equal to 108g/l, strip steel continuously moves forward and passes through a pickling bath to remove iron oxide scales on the surface of the strip steel as a raw material, and large and small circulation of acid liquor also needs to be carried out uninterruptedly.
Theoretically, in the pickling process, the acid amount in the pickling tank accounts for 40% of the volume of the pickling tank, the acid amount in each tank is kept about 30% except the acid amount in the pickling tank, and the acid liquid amount in each tank is kept consistent, namely, the liquid level is balanced. In practical production, the unbalance of the liquid levels of the three acid tanks is a prominent problem, and the phenomenon is as follows: the liquid level of the No. 2 tank is lower than that of the No. 3 tank, and the liquid level of the No. 1 tank is lower than that of the No. 2 tank.
Causes of unbalance of liquid levels of the acid tanks: no matter how the relative wringing effect of the wringing rollers is, acid liquor on the surface of the strip steel cannot be completely wrung in the acid washing process; after the wringing roller is pressed down, certain elastic bending deformation is generated under the pressing force at two ends, so that a gap is generated between the wringing roller and the strip steel, and the strip steel is provided with acid; the drying roller is worn, and the acid content of the strip steel is increased; when the strip steel with larger width is subjected to acid cleaning, the acid content of the strip steel is increased; the shape of the strip steel of the raw material is not good, so that the acid squeezing effect of a squeezing roller is not good, and the acid content of the strip steel is increased; the communicating mode of the acid tank communicating pipe has natural defects; the acid tank communicating pipe has deposition of non-acid-compatible substances such as broken glue and the like, so that the acid liquor is not communicated smoothly. Because the advancing direction of the strip steel is 1# groove-2 # groove-3 # groove, the liquid level of 3 acid tanks is unbalanced, the liquid level of 1# tank-2 # tank-3 # tank is increased in sequence, the acid amount of 1# tank is less and less, and the acid amount of 2# tank and 3# tank is more and more.
Influence of acid tank liquid level imbalance: normal acid change in production cannot be realized. Because the strip steel is provided with acid, the flowing direction of the acid liquor is opposite to the normal large circulation direction, so that the acid exchange can not be normally carried out. When the liquid level of the 3# tank is higher than a certain amount, no space for allowing the regenerated acid to enter exists any more, and when the liquid level of the 1# tank is lower than a certain amount, no acid can be discharged to a regenerated acid station; the acid liquor concentration can not be controlled according to the process requirements. Because the 3# tank acid liquor cannot flow to the 2# tank in time, the 2# acid tank liquor cannot flow to the 1# tank in time, and the 1# tank acid liquor is less and less, the concentration of free acid is rapidly reduced to be lower than 10g/l, the concentration of iron is rapidly increased to be higher than 180g/l, the pickling effect is seriously influenced, and iron oxide scales are remained on the surface of the pickled strip steel; when the No. 1 acid tank liquid level drops below 5%, a shutdown is caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a strip steel continuous hydrochloric acid washing device for realizing the liquid level balance of acid tanks, which solves the problem of unbalanced liquid level of each acid tank in the pickling production process, ensures the balanced acid change in the pickling production process, and ensures that the regenerated acid amount supplied by a regenerated acid station to a 3# acid tank is consistent with the waste acid amount discharged by a 1# acid tank to the regenerated acid station in flow/hour; ensuring that the concentration of free acid and the concentration of iron in each pickling tank can be completely controlled according to the process requirements.
The technical scheme of the utility model as follows:
a continuous hydrochloric acid washing device for realizing the liquid level balance of an acid tank for strip steel comprises three pickling tanks, wherein the three pickling tanks are a No. 1 pickling tank, a No. 2 pickling tank and a No. 3 pickling tank from left to right; the three acid tanks are respectively a 1# acid tank, a 2# acid tank and a 3# acid tank from left to right; an overflow groove is formed between the isolation wall of one pickling tank and the isolation wall of the other pickling tank, and a squeezing roller is arranged above the overflow groove; the three acid tanks are connected through an acid tank communicating pipe; an overflow acid return pipe is arranged between the bottom of the overflow tank and the top of the acid tank; an acid pipe is connected between the acid tank and the acid washing tank, and an acid pump is arranged on the acid pipe;
the pickling tank bottom all sets up the self-loopa heating circuit, set up an acidizing fluid compensating pipe between the acid pump outlet end of the last sour pipe of 3# descaling bath and the suction end of the self-loopa heating circuit of 2# descaling bath, also set up an acidizing fluid compensating pipe between the acid pump outlet end of the last sour pipe of 2# descaling bath and the suction end of the self-loopa heating circuit of 1# descaling bath, all concatenate a compensation governing valve on the acidizing fluid compensating pipe, the compensation governing valve is automatic compensation governing valve or manual compensation governing valve.
The continuous hydrochloric acid washing device of belted steel of foretell realization acid tank liquid level balance, its preferred scheme does, self-loopa heating loop includes from circulating pump and graphite heater, takes out acidizing fluid by descaling bath one end from the circulating pump, heats through graphite heater, squeezes into the descaling bath other end, and the acidizing fluid temperature reaches 75 ~ 80 ℃.
The above-mentioned belted steel continuous hydrochloric acid that realizes acid tank liquid level balance washes device, its preferred scheme does, all set up the level gauge on the acid tank, be 1# level gauge, 2# level gauge and 3# level gauge from left to right in proper order, level gauge and compensation governing valve are connected with the computer respectively, form closed-loop control, realize the automatic control of acidizing fluid compensation adjustment: when the 3# liquid level meter detects that the liquid level of the 3# acid tank is larger than the liquid level of the 2# acid tank, the signals are compared by the computer and fed back to the V2 compensation adjusting valve, the V2 is opened, acid liquid in the 3# acid tank is supplemented to the 2# acid tank, the more the liquid level of the 3# acid tank is higher than the liquid level of the 2# acid tank, the larger the V2 opening amount is, and the larger the compensation amount is; when the 2# liquid level meter detects that the 2# acid tank liquid level is greater than the 1# acid tank liquid level, the computer compares the signal and then feeds back to the V1 compensation adjusting valve, the V1 is opened, acid liquor in the 2# acid tank is supplemented to the 1# acid tank, the more the 2# acid tank liquid level is higher than the 1# acid tank liquid level, the larger the V1 opening amount is, and the larger the compensation amount is.
The utility model has the advantages that:
(1) the liquid level imbalance caused by the strip steel with acid due to poor strip shape, the abrasion of the wringing roller and the elastic deformation of the wringing roller can be completely overcome;
(2) the imbalance of the liquid level of the acid tank caused by the unsmooth communication of the communicating pipes of the acid tank can be completely overcome;
(3) the acid compensating pipe has strong acid supplementing capacity under the action of the pressure of the acid pump of the acid feeding pipe, completely compensates the condition that the liquid level capacity of each tank of the acid tank communicating pipe is insufficient by means of liquid level difference overflow balance, can still keep the liquid level balance of each acid tank in a high-speed steel pickling state, and weakens the action of the acid tank communicating pipe when the acid compensating pipe is put into use;
(4) the acid liquor compensation flow can be adjusted by the compensation adjusting valve, so that the liquid level of the acid tank is easier to control.
(5) The normal operation of acid changing is ensured through the two acid liquor compensating pipes, the acid liquor concentration of each pickling tank is controlled according to requirements, the pickling quality is ensured, and the normal production can be ensured under the condition that the communicating pipe of the acid tank is not communicated smoothly;
(6) the service cycle of the wringing roller of the pickling section is prolonged, the downtime for replacing the wringing roller is reduced, and the downtime of an empty tank caused by the acid carrying of the strip steel is reduced.
Drawings
FIG. 1 is a schematic view of a conventional shallow-groove continuous pickling apparatus;
FIG. 2 is a schematic diagram of a continuous hydrochloric acid washing device for strip steel for realizing the liquid level balance of an acid tank.
FIG. 1-acid wash tank; 2-acid tank; 3-a pickling bath partition wall; 4-an overflow trough; 5-a squeezing roller; 6-acid tank communicating pipe; 7-overflow acid return pipe; 8-acid feeding pipe; 9-acid pump; 10-self-circulating heating loop; 11-a compensation pipe; 12-compensation regulating valve; 13-self-circulating pump; 14 a graphite heater; 15-a liquid level meter; 16-computer.
Detailed Description
All directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
As shown in FIG. 2, the continuous hydrochloric acid washing device for realizing the liquid level balance of the acid tank comprises three pickling tanks 1, namely a 1# pickling tank, a 2# pickling tank and a 3# pickling tank from left to right; the three acid tanks 2 are respectively a 1# acid tank, a 2# acid tank and a 3# acid tank from left to right; an overflow trough 4 is formed between the partition wall 3 of one pickling tank 1 and the partition wall 3 of the other pickling tank 1, and a drying roll 5 is arranged above the overflow trough 4; the three acid tanks 2 are connected through an acid tank communicating pipe 6; an overflow acid return pipe 7 is arranged between the bottom of the overflow groove 4 and the top of the acid tank 2; an acid pipe 8 is connected between the acid tank 2 and the acid washing tank 1, and an acid pump 9 is arranged on the acid pipe 8;
the pickling tank 1 bottom all sets up self-loopa heating circuit 10, set up an acidizing fluid compensating pipe 11 between the acid pump 9 exit end of last sour pipe 8 of 3# pickling tank 2 and the self-loopa heating circuit 10's of 2# pickling tank 1 suction end, also set up an acidizing fluid compensating pipe 11 between the acid pump 9 exit end of last sour pipe 8 of 2# pickling tank 1 and the self-loopa heating circuit 10's of 1# pickling tank 1 suction end, a compensation governing valve 12 all concatenates on the acidizing fluid compensating pipe 11, compensation governing valve 12 is automatic compensation governing valve or manual compensation governing valve.
The continuous hydrochloric acid washing device of belted steel of foretell realization acid tank liquid level balance, self-loopa heating circuit 10 includes from circulating pump 13 and graphite heater 14, takes out acidizing fluid by descaling bath 1 one end from circulating pump 13, heats through graphite heater 14, squeezes into the descaling bath 1 other end, and the acidizing fluid temperature reaches 75 ~ 80 ℃.
The device is washed to foretell belted steel continuous hydrochloric acid that realizes acid tank liquid level balance, all set up level gauge 15 on the acid tank, be 1# level gauge, 2# level gauge and 3# level gauge from left to right in proper order, level gauge 15 and compensation governing valve 12 are connected with computer 16 respectively, form closed-loop control, realize the automatic control of acidizing fluid compensation adjustment: when the 3# liquid level meter 15 detects that the liquid level of the 3# acid tank 2 is larger than the liquid level of the 2# acid tank 2, signals are compared by the computer 16 and then fed back to the V2 compensation adjusting valve 12, the V2 is opened, acid liquid in the 3# acid tank 2 is supplemented to the 2# acid tank 2, and the more the liquid level of the 3# acid tank 2 is higher than the liquid level of the 2# acid tank 2, the larger the V2 opening amount is, and the larger the compensation amount is; when the 2# liquid level meter 15 detects that the liquid level of the 2# acid tank 2 is greater than the liquid level of the 1# acid tank 2, the computer 16 compares signals and feeds back the signals to the V1 compensation adjusting valve 12, the V1 is opened, acid liquor in the 2# acid tank 2 is supplemented to the 1# acid tank 2, and the more the liquid level of the 2# acid tank 2 is greater than the liquid level of the 1# acid tank 2, the larger the V1 opening amount is, and the larger the compensation amount is.
Claims (3)
1. A continuous hydrochloric acid washing device for realizing the liquid level balance of an acid tank for strip steel comprises three pickling tanks, wherein the three pickling tanks are a No. 1 pickling tank, a No. 2 pickling tank and a No. 3 pickling tank from left to right; the three acid tanks are respectively a 1# acid tank, a 2# acid tank and a 3# acid tank from left to right; an overflow groove is formed between the isolation wall of one pickling tank and the isolation wall of the other pickling tank, and a squeezing roller is arranged above the overflow groove; the three acid tanks are connected through an acid tank communicating pipe; an overflow acid return pipe is arranged between the bottom of the overflow tank and the top of the acid tank; connect between acid tank and the descaling bath and go up the sour pipe, go up and set up the acid pump on the sour pipe, its characterized in that:
the pickling tank bottom all sets up the self-loopa heating circuit, set up an acidizing fluid compensating pipe between the acid pump outlet end of the last sour pipe of 3# descaling bath and the suction end of the self-loopa heating circuit of 2# descaling bath, also set up an acidizing fluid compensating pipe between the acid pump outlet end of the last sour pipe of 2# descaling bath and the suction end of the self-loopa heating circuit of 1# descaling bath, all concatenate a compensation governing valve on the acidizing fluid compensating pipe, the compensation governing valve is automatic compensation governing valve or manual compensation governing valve.
2. The continuous hydrochloric acid washing device for realizing the liquid level balance of the acid tank of the strip steel as claimed in claim 1, which is characterized in that: the self-circulation heating loop comprises a self-circulation pump and a graphite heater, acid liquor is pumped out from one end of the pickling tank through the self-circulation pump, is heated by the graphite heater and is pumped into the other end of the pickling tank, and the temperature of the acid liquor reaches 75-80 ℃.
3. The continuous hydrochloric acid washing device for realizing the liquid level balance of the acid tank of the strip steel as claimed in claim 1, which is characterized in that: the acid tank is provided with liquid level meters, and the liquid level meters and the compensation regulating valves are respectively connected with a computer to form closed-loop control, so that automatic control of acid liquor compensation regulation is realized.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020358341.7U CN211921709U (en) | 2020-03-20 | 2020-03-20 | Strip steel continuous hydrochloric acid washing device for realizing acid tank liquid level balance |
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| CN202020358341.7U CN211921709U (en) | 2020-03-20 | 2020-03-20 | Strip steel continuous hydrochloric acid washing device for realizing acid tank liquid level balance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877708A (en) * | 2021-01-13 | 2021-06-01 | 本钢板材股份有限公司 | Strip steel pickling tank system convenient to clean and cleaning method thereof |
| CN114918179A (en) * | 2022-03-29 | 2022-08-19 | 亳州市强力金刚石有限公司 | Artificial diamond material washs drying machine |
| CN115044916A (en) * | 2022-06-20 | 2022-09-13 | 本钢板材股份有限公司 | Strip steel pickling equipment capable of quickly changing concentration of pickling solution and application method thereof |
-
2020
- 2020-03-20 CN CN202020358341.7U patent/CN211921709U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112877708A (en) * | 2021-01-13 | 2021-06-01 | 本钢板材股份有限公司 | Strip steel pickling tank system convenient to clean and cleaning method thereof |
| CN114918179A (en) * | 2022-03-29 | 2022-08-19 | 亳州市强力金刚石有限公司 | Artificial diamond material washs drying machine |
| CN115044916A (en) * | 2022-06-20 | 2022-09-13 | 本钢板材股份有限公司 | Strip steel pickling equipment capable of quickly changing concentration of pickling solution and application method thereof |
| CN115044916B (en) * | 2022-06-20 | 2023-09-19 | 本钢板材股份有限公司 | Strip steel pickling equipment capable of rapidly changing concentration of pickling solution and application method thereof |
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