CN211921708U - Reverse flushing system for cold rolling and pickling process section - Google Patents
Reverse flushing system for cold rolling and pickling process section Download PDFInfo
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- CN211921708U CN211921708U CN202020358333.2U CN202020358333U CN211921708U CN 211921708 U CN211921708 U CN 211921708U CN 202020358333 U CN202020358333 U CN 202020358333U CN 211921708 U CN211921708 U CN 211921708U
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Abstract
The utility model discloses a reverse flushing system for a cold rolling pickling process section, which comprises a reverse flushing tank, a first wringing roller, a second wringing roller, a primary purging device, a secondary purging device, a flushing device and an acid value detector; the flushing tank comprises a tank body and a tank cover, and a first squeezing roller, a primary blowing device, a flushing device, a secondary blowing device and a second squeezing roller are symmetrically and sequentially arranged in the reverse flushing tank from top to bottom in the width direction of the strip steel; the squeezing roller consists of an upper roller and a lower roller, the upper roller and the lower roller both comprise rubber roller bodies, shaft heads and shaft sleeves are additionally arranged at two ends of the rubber roller bodies, and pneumatic cylinders are arranged below the shaft heads of the upper roller; the purging device comprises an upper purging beam and a lower purging beam, and each beam is provided with a plurality of nozzles; the washing device comprises an upper spraying beam and a lower spraying beam, and a plurality of nozzles are arranged on each spraying beam. The utility model discloses occupation space is little, possesses wringing, sweeps, washing function, can detach the parking scale of cold rolling sour technology section.
Description
Technical Field
The utility model relates to a cold rolling pickling process field, concretely relates to reverse rinse-system for cold rolling pickling process section.
Background
The production of the cold-rolled strip steel takes the hot-rolled strip steel as a raw material, and the surface of the hot-rolled strip steel is black and dark because of the iron scale generated by the high temperature of hot rolling; the surface of the cold-rolled strip steel is silvery white and bright because the cold-rolled strip steel is subjected to acid cleaning treatment before cold rolling. In the production process, the strip steel advances along the arrow direction shown in figure 1 in the pickling process section, and is sequentially subjected to pickling, washing, blowing and drying, wherein the pickling is to remove the iron oxide scale on the surface of the strip steel by utilizing the principle that the iron oxide reacts with hydrochloric acid to produce ferric chloride and water; the washing is to wash the upper and lower surfaces of the strip steel by desalted water to remove residual acid liquor on the surface of the strip steel after acid washing; the purging is to purge the upper and lower surfaces of the strip steel by using compressed air to remove the residual flushing water on the surface of the strip steel after being flushed; the drying is to use hot air to dry and dry the surface of the strip steel completely. The acid liquor temperature is 70-85 ℃, the washing water temperature is 60-80 ℃, the temperature of the strip steel is above 60 ℃ after acid washing and washing, and at the temperature, the surface residual water can generate secondary rust without blowing and drying, so the aims of removing the iron oxide scale on the surface of the raw material and presenting the white, bright and natural color of the steel matrix can be achieved only through the series of procedures of the acid washing process section.
The existing flushing tank is divided into 4 stages (or 5 stages) and sequentially comprises 1 stage flushing, 2 stage flushing, 3 stage flushing and 4 stage flushing from left to right. In the production process, fresh water desalted water firstly flows to a 4 th-level flushing tank and then flows to a 3-level, 2-level and 1-level flushing tank in sequence, and flushing wastewater is discharged to a flushing water tank from the 1-level flushing tank in a full flow mode. The strip steel continuously advances, and the spray pump continuously sprays high-temperature washing water to the upper surface and the lower surface of the strip steel through the spray pipes to clean residual acid liquor. Once the strip steel stops advancing for more than 5 minutes, the strip steel staying in the washing tank cannot be swept and dried in time, and can generate rust under the action of high-temperature steam and surface residual water in the tank, namely the parking rust. If the machine is stopped, the machine inevitably suffers from the occurrence of the scale on stoppage, and the scale cannot be removed in the subsequent steps such as rolling, annealing, and galvanizing. The 2-time shutdown per shift is an ideal state, and in actual production, even if maintenance personnel make the equipment in an optimal state and the operation personnel carefully operate, the shutdown time per shift exceeds 2 times for various reasons. That is, the production inevitably generates the parking scale, and the continuous pickling process inevitably generates the parking scale in the production process.
The hydrochloric acid can remove the iron scale of the hot rolling raw material, so the hydrochloric acid can easily remove the parking scale, and the steel pouring method is adopted to make the section of the strip steel with the parking scale back enter the pickling tank to remove the scale. Therefore, if the strip is to be reversed to eliminate the stop-over scale by reversing the strip, the problem of carrying acid from the pickling tank to the outside when the strip is reversed and the associated problems must be solved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a reverse flushing system for cold rolling pickling process section.
The technical scheme of the utility model as follows:
a reverse flushing system for a cold-rolling pickling process section is placed at an inlet of a pickling tank of the cold-rolling pickling process section and comprises a reverse flushing tank, a first squeezing roller, a second squeezing roller, a primary purging device, a secondary purging device, a flushing device and an acid value detector;
the reverse flushing tank comprises a tank body and a tank cover, and is characterized in that the reverse flushing tank is internally and symmetrically arranged in sequence from top to bottom according to the width direction of the strip steel: the device comprises a first squeezing roller, a primary blowing device, a flushing device, a secondary blowing device and a second squeezing roller;
the first drying roller and the second drying roller are of the same structure and are composed of an upper roller and a lower roller, the upper roller and the lower roller respectively comprise a rubber roller body, shaft heads and shaft sleeves are additionally arranged at two ends of the rubber roller body, and a pneumatic cylinder is arranged below the shaft heads of the upper roller;
the primary purging device and the secondary purging device are of the same structure and respectively comprise an upper purging crossbeam and a lower purging crossbeam, each crossbeam is provided with a plurality of nozzles which are 100mm away from the upper surface and the lower surface of the strip steel, and the nozzles form 45-degree angles towards the surface of the strip steel and towards the edge of the strip steel;
the flushing device comprises an upper spray beam and a lower spray beam, and a plurality of nozzles are arranged on each spray beam;
the acid value detector is arranged on the inner wall of the groove body of the reverse flushing groove and is connected with a computer.
The above-mentioned one kind is used for the cold rolling pickling process section to wash the system in the opposite direction, and its preferred scheme is: and a pipeline is arranged between the reverse flushing tank and the desalted water tank of the cold-rolling and acid-washing process section, and a water supplementing valve is arranged on the pipeline and is connected with a computer.
The above-mentioned one kind is used for the cold rolling pickling process section to wash the system in the opposite direction, and its preferred scheme is: the inside below of reverse flushing tank holds the demineralized water that washes belted steel, and the cell body is steel construction shell, and the resistant acid saddle rock of inside lining, capping are acidproof PP material, prevent that sour gas from leaking.
The above-mentioned one kind is used for the cold rolling pickling process section to wash the system in the opposite direction, and its preferred scheme is: the probe of the acid value detector extends into the desalted water of the reverse flushing tank.
The above-mentioned one kind is used for the cold rolling pickling process section to wash the system in the opposite direction, and its preferred scheme is: and a jet beam of the flushing device is connected with a jet water pump, and the flushing water in the groove is sucked and then is jetted to the surface of the strip steel.
The reverse flushing system for the cold rolling pickling process section is combined with other pickling process sections, and the working process of the reverse flushing system is as follows: the inching process section is combined backwards; the upper rollers of the first wringing roller and the second wringing roller in the reverse flushing system fall down; the primary purging device and the secondary purging device are communicated with a gas source and begin to purge; starting a jet water pump of the flushing device, and jetting desalted water to the upper surface and the lower surface of the strip steel; starting a strip steel transmission device, backing up strip steel and inching, and discharging the strip steel from a pickling bath; carrying acid liquor out of the surface of the strip steel and entering a reverse flushing system; the acid-containing strip steel passes through a first wringing roller in a reverse flushing system, and most of acid liquor on the surface of the strip steel is squeezed off by the first wringing roller; the strip steel passes through the purging device for 1 time in the reverse flushing system, the purging device purges compressed air to the upper surface and the lower surface of the strip steel, and acid liquor on the surface of the strip steel is further reduced; the strip steel passes through a spraying beam of a washing system, an upper nozzle and a lower nozzle to spray desalted water to the upper surface and the lower surface of the strip steel, and after the strip steel is washed by the sprayed desalted water, the residual acid liquor on the surface of the strip steel is washed away; the strip steel passes through the blowing device for 2 times to blow off desalted water on the upper surface and the lower surface of the strip steel; the strip steel passes through a second wringing roller in the reverse flushing system to wring out the residual desalted water on the surface of the strip steel; the strip steel continues to move backwards until the defect of the water rust during the stop completely enters the pickling tank and is removed by acid liquor in the pickling tank, the inching handle is loosened, the strip steel stops, the purging in the reverse flushing system stops, the upper roll of the wringing roll is lifted, and the water injection pump in the flushing device stops; and finishing the work in the reverse flushing system.
The utility model has the advantages that:
(1) the utility model is used for removing the parking water rust of the cold rolling and pickling process section;
(2) the utility model occupies small space, only 2 meters are needed along the length direction of the strip steel, and the functions of squeezing, blowing and flushing can be achieved;
(3) the utility model has higher economic benefit, because the parking scale is eliminated, the economic loss is reduced;
(4) the utility model discloses the construction degree of difficulty is little, both can incorporate initial design, also can install additional after equipment debugging phase or the operation.
Drawings
FIG. 1 is a flow chart of the prior pickling process section
FIG. 2 is a schematic view of a reverse flushing system
FIG. 3 is a schematic view of the upper roll of the wringing roll
FIG. 4 is a schematic view of a primary and secondary purging device
FIG. 5 is a schematic view of a purge beam and nozzle
FIG. 6 is a schematic view of a flushing device
FIG. 1-pickling tank; 2-washing the tank; 3-a first drying roller; 4-second drying roller; 5-a primary purging device; 6-secondary purging device; 7-a washing device; 8-acid value detector; 9-a computer; 10-a desalted water pump; 11-a water replenishing valve; 12-a rubber roller body; 13-a shaft head; 14-a shaft sleeve; 15-a pneumatic cylinder; 16-a purge beam; 17-a nozzle; 18-a spray beam; 19-nozzle.
Detailed Description
As shown in fig. 1 to 6, the reverse flushing system for the cold rolling and pickling process section is placed at an inlet of a pickling tank 1 of the cold rolling and pickling process section, and comprises a reverse flushing tank 2, a first wringing roller 3, a second wringing roller 4, a primary purging device 5, a secondary purging device 6, a flushing device 7 and an acid value detector 8;
the reverse flushing tank 2 comprises a tank body and a tank cover, and is arranged in the reverse flushing tank in sequence in an up-and-down symmetrical mode according to the width direction of the strip steel: the first wringing roller 3, the primary blowing device 5, the flushing device 7, the secondary blowing device 6 and the second wringing roller 4;
the first drying roller 3 and the second drying roller 4 are of the same structure and are composed of an upper roller and a lower roller, the upper roller and the lower roller respectively comprise a rubber roller body 12, a shaft head 13 and a shaft sleeve 14 which are additionally arranged at two ends of the rubber roller body, and a pneumatic cylinder 15 is arranged below the shaft head of the upper roller;
the primary purging device 5 and the secondary purging device 6 are of the same structure and respectively comprise an upper purging crossbeam 16 and a lower purging crossbeam 16, each crossbeam 16 is provided with 4 nozzles 17 which are respectively 100mm away from the upper surface and the lower surface of the strip steel, and the nozzles form 45-degree angles towards the surface of the strip steel and towards the edge of the strip steel;
the flushing device 7 comprises an upper spray beam 18 and a lower spray beam 18, and a plurality of nozzles 19 are arranged on each spray beam;
the acid value detector 8 is arranged on the inner wall of the groove body of the reverse flushing groove 2 and is connected with a computer 9, and a probe of the acid value detector 8 extends into the desalted water of the reverse flushing groove 2.
And a pipeline is arranged between the reverse flushing tank 2 and the desalted water tank of the cold rolling and pickling process section, a water replenishing valve 11 is arranged on the pipeline, and the water replenishing valve 11 is connected with a computer 9.
The inside below of reverse flushing tank 2 holds the demineralized water that washes belted steel, and the cell body is steel construction shell, and the resistant acid saddle rock of inside lining, capping are acidproof PP material, prevent that sour gas from leaking.
And a jet beam of the flushing device 7 is connected with a jet water pump, so that flushing water in the reverse flushing tank 2 is sucked and then sprayed to the surface of the strip steel, the acid value detector 8 detects the acid value of desalted water in the reverse flushing tank 2, and the detected acid value controls the opening or closing of a water replenishing valve 11 of the desalted water through the computer 8 so as to control the acid value of the desalted water in the reverse flushing tank 2.
Claims (6)
1. A reverse flushing system for a cold rolling and pickling process section is characterized in that: the device comprises a reverse flushing tank, a first squeezing roller, a second squeezing roller, a primary purging device, a secondary purging device, a flushing device and an acid value detector;
the reverse flushing tank comprises a tank body and a tank cover, and is characterized in that the reverse flushing tank is internally and symmetrically arranged in sequence from top to bottom according to the width direction of the strip steel: the device comprises a first squeezing roller, a primary blowing device, a flushing device, a secondary blowing device and a second squeezing roller;
the first drying roller and the second drying roller are of the same structure and are composed of an upper roller and a lower roller, the upper roller and the lower roller respectively comprise a rubber roller body, shaft heads and shaft sleeves are additionally arranged at two ends of the rubber roller body, and a pneumatic cylinder is arranged below the shaft heads of the upper roller;
the primary purging device and the secondary purging device are of the same structure and respectively comprise an upper purging crossbeam and a lower purging crossbeam, each crossbeam is provided with a plurality of nozzles which are 100mm away from the upper surface and the lower surface of the strip steel, and the nozzles form 45-degree angles towards the surface of the strip steel and towards the edge of the strip steel;
the flushing device comprises an upper spray beam and a lower spray beam, and a plurality of nozzles are arranged on each spray beam;
the acid value detector is arranged on the inner wall of the groove body of the reverse flushing groove and is connected with a computer.
2. A reverse flushing system for a cold rolling and pickling process section as set forth in claim 1, wherein: and a pipeline is arranged between the reverse flushing tank and the desalted water tank of the cold-rolling and acid-washing process section, and a water supplementing valve is arranged on the pipeline and is connected with a computer.
3. A reverse flushing system for a cold rolling and pickling process section as set forth in claim 1, wherein: the inside below of reverse flushing tank holds the demineralized water that washes belted steel, and the cell body is steel construction shell, and the resistant acid saddle rock of inside lining, capping are acidproof PP material, prevent that sour gas from leaking.
4. A reverse flushing system for a cold rolling and pickling process section as set forth in claim 1, wherein: the probe of the acid value detector extends into the desalted water of the reverse flushing tank.
5. A reverse flushing system for a cold rolling and pickling process section as set forth in claim 1, wherein: and a jet beam of the flushing device is connected with a jet water pump, and the jet water pump sucks flushing water in the groove and then sprays the flushing water to the surface of the strip steel.
6. A reverse flushing system for a cold rolling and pickling process section as set forth in claim 1, wherein: the reverse flushing system is arranged at the inlet of a pickling tank of the cold-rolling pickling process section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020358333.2U CN211921708U (en) | 2020-03-20 | 2020-03-20 | Reverse flushing system for cold rolling and pickling process section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020358333.2U CN211921708U (en) | 2020-03-20 | 2020-03-20 | Reverse flushing system for cold rolling and pickling process section |
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| Publication Number | Publication Date |
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| CN211921708U true CN211921708U (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020358333.2U Active CN211921708U (en) | 2020-03-20 | 2020-03-20 | Reverse flushing system for cold rolling and pickling process section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115261876A (en) * | 2022-07-25 | 2022-11-01 | 北京首钢国际工程技术有限公司 | Strip steel surface drying device |
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2020
- 2020-03-20 CN CN202020358333.2U patent/CN211921708U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115261876A (en) * | 2022-07-25 | 2022-11-01 | 北京首钢国际工程技术有限公司 | Strip steel surface drying device |
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