CN210856355U - Row allies oneself with mends pickling rinsing unit with rinsing section in advance - Google Patents
Row allies oneself with mends pickling rinsing unit with rinsing section in advance Download PDFInfo
- Publication number
- CN210856355U CN210856355U CN201922109921.2U CN201922109921U CN210856355U CN 210856355 U CN210856355 U CN 210856355U CN 201922109921 U CN201922109921 U CN 201922109921U CN 210856355 U CN210856355 U CN 210856355U
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- acid
- tank
- rinsing
- section
- pickling
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- Expired - Fee Related
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- 238000005554 pickling Methods 0.000 title claims abstract description 55
- 239000002253 acid Substances 0.000 claims abstract description 213
- 238000005406 washing Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002351 wastewater Substances 0.000 claims abstract description 8
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 description 20
- 239000010959 steel Substances 0.000 description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 229910002804 graphite Inorganic materials 0.000 description 12
- 239000010439 graphite Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000001502 supplementing effect Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 150000002678 macrocyclic compounds Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The utility model discloses a tandem arrangement and compensation pickling and rinsing unit with a pre-rinsing section, which comprises a pickling section, a pre-rinsing section and a rinsing section, wherein the pickling section comprises an acid tank and a circulating tank; acid liquor circulation exists between the acid tanks and the circulation tanks with the same labels; the circulating tanks are connected in series through pipelines; the rear end of the fourth acid tank is provided with an acid squeezing roller, an acid spraying beam and a three-way acid discharge pipeline; the pre-rinsing section comprises: a pre-rinsing tank, a pre-rinsing tank cover plate, a water spraying beam, a waste water pipeline and a water squeezing roller. Compared with the prior art, the acid consumption can be reduced on the basis of effective acid washing.
Description
Technical Field
The utility model relates to steel production equipment, in particular to a low-acid-consumption and low-iron-loss pickling and rinsing unit suitable for hot-rolled coil pickling operation.
Background
The pickling process of the steel products is a necessary previous process in the surface treatment of strip steel such as galvanized steel, coated steel and the like, the pickling effect of the strip steel is guaranteed by controlling the concentration of hydrochloric acid and temperature parameters of pickling in a traditional pickling device, new acid is continuously supplemented into an acid tank under the condition that a certain pickling temperature is guaranteed, and waste acid with low concentration is discharged from the last acid tank, the traditional pickling device is used for controlling the discharge of new acid when the new acid amount and the free acid concentration of the last acid tank are lower than 45g/L every hour, the concentration of the acid solution is detected every 4 hours, generally, the ton steel acid consumption of a current pickling temper mill production line is 80-90L/t, due to the successful development of the technology of the current pickling temper rolling production line, the thickness of hot rolling raw materials is expanded to 0.8-4.0mm from a thick plate with the thickness of 2.0mm or more of the current equipment, the relationship between the consumption of the acid of ① ton steel acid and the thickness of the strip steel is generally, the oxidation area of the ton steel is larger, the consumption of the steel is increased, the acid consumption of the ESP is also increased from the maximum, the consumption of the ESP is increased from the consumption of the current pickling production line, the heavy plate, the consumption of the strip steel is increased from the consumption of the heavy plate, the heavy plate production line, the consumption of the heavy plate, the heavy plate production line is increased from the heavy plate production line, the heavy plate consumption of the heavy plate production line is increased from the heavy plate production line, the heavy plate production.
SUMMERY OF THE UTILITY MODEL
The technical task of the utility model is to provide a ally oneself with row's antithetical couplet benefit pickling rinsing unit with rinsing section in advance to the not enough of above prior art. On the basis of traditional pickling and rinsing equipment, the equipment controls the liquid level of a circulating tank and the conductivity of acid liquor to be reasonably used to reduce pickling acid consumption and pickling iron loss by virtue of combined compensation and adding of waste acid and fresh acid.
The technical proposal of the utility model for solving the technical problem is that: the utility model provides a ally oneself with and mend pickling rinsing unit of antithetical couplet with rinse section in advance, includes pickling section and rinse section, its characterized in that: also comprises a pre-rinsing section; the acid washing section comprises a first acid tank, a second acid tank, a third acid tank, a fourth acid tank, a first circulating tank, a second circulating tank, a third circulating tank and a fourth circulating tank; acid liquor circulation exists between the acid tanks and the circulation tanks with the same labels; the fourth circulating tank, the third circulating tank, the second circulating tank and the first circulating tank are connected in series through a pipeline with an acid valve; the first circulating tank is connected with an acid discharging passage through an acid valve; the fourth circulating tank is connected with an acid adding passage through an acid valve; the rear end of the fourth acid tank is provided with an acid squeezing roller, the front upper part of the acid squeezing roller is provided with an acid spraying beam communicated with a fourth circulating tank, the bottom of the rear section of the fourth acid tank is provided with a three-way acid discharging pipeline, and two outlets of the three-way acid discharging pipeline are provided with a circulating valve and a sewage discharging valve; the pre-rinsing section is arranged between the acid squeezing roller of the fourth acid tank of the acid-washing section and the rinsing section, and the pre-rinsing section comprises: the device comprises a pre-rinsing tank, a pre-rinsing tank cover plate, a water spray beam, a waste water pipeline and a water squeezing roller; the front end of the pre-rinsing tank is provided with a front baffle, and the rear end of the pre-rinsing tank is provided with a rear baffle; the length of the pre-rinsing tank cover plate is longer than that of the pre-rinsing tank, a front and a rear acid squeezing roller baffle plates are arranged at the lower part of the pre-rinsing tank cover plate corresponding to the acid squeezing roller of the fourth acid tank, and a front and a rear water squeezing roller baffle plates are arranged at the lower part of the pre-rinsing tank cover plate corresponding to the water squeezing roller.
The acid tanks are separated from each other by a pair of acid squeezing rollers.
The fourth circulation tank also comprises a self-circulation passage, and the self-circulation passage is formed by connecting a self-circulation acid outlet with the acid adding passage through an acid washing pump.
And a liquid level meter is arranged in each circulation tank. A conductivity meter is arranged between the first circulating tank and the acid valve of the acid discharging passage; and a conductivity meter is arranged between the fourth circulation tank and the acid valve of the acid inlet passage.
Compared with the prior art, the utility model is suitable for hot rolling raw materials with the thickness range of 0.8-4.0mm, the raw materials in the range can realize effective pickling, and the upper limit of the maximum effective pickling speed of the sheet can reach 400 m/min; the combined-row combined compensation can be realized, the workload of manual measurement is reduced, the working procedure is simplified, and the labor cost is reduced; the equipment reduces the steel acid consumption from the existing 80-90L/T level to 55-70L/T, reduces the iron loss of pickling from the original 1.05% to 0.95%, reduces 0.1%, and reduces the average ton steel acid consumption by 20L/T.
Drawings
Fig. 1 is a schematic view of the combined-row combined compensation structure of the present invention.
Fig. 2 is a partial schematic view of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the detailed description. For better description, the strip entering direction is taken as the front, and the reverse is taken as the rear.
The utility model relates to a ally oneself with row's antithetical couplet benefit pickling rinsing unit with rinsing section in advance is based on pickling section in the pickling leveling unit, predetermines rinsing section, antithetical couplet of antithetical couplet benefit through adding under the circumstances of guaranteeing belted steel pickling effect, and control circulation tank liquid level, acidizing fluid conductivity are rationally used, reduce the equipment that pickling process acid consumed.
The utility model discloses a hardware relies on lying in the redesign of pickling leveling machine group pickling section to, what the following statement was directed against is pickling leveling machine group pickling section, and other parts of unit are different according to the production line, and do not have the injecing.
As shown in fig. 1, the embodiment adds a pre-rinse section to the existing pickling section and five-stage rinse section of the pickling line. That is to say, the utility model discloses an acid cleaning section, pre-rinsing section and rinsing section, wherein the rinsing section specifically be five levels of rinsing sections.
The acid washing section is divided into four acid tanks which are respectively named as a first acid tank 1, a second acid tank 2, a third acid tank 3 and a fourth acid tank 4 according to the sequence of strip steel entering the acid tanks. In this embodiment unit, every acid groove length 25m, separate each other through a pair of crowded sour roller between the acid groove, and every acid groove corresponds a set of circulation tank: a first circulation tank 5, a second circulation tank 6, a third circulation tank 7 and a fourth circulation tank 8 are used for ensuring the supply of acid liquor, and acid liquor circulation exists between the acid tanks with the same reference numbers. The circulation tank is also used as an acid liquor collection tank, the circulation tanks are sequentially communicated and controlled by a valve and a liquid level, so that the acid liquor in the fourth circulation tank flows towards the third circulation tank, the second circulation tank and the first circulation tank continuously in a gradient manner. Each recycle tank is guaranteed to have a concentration from high to low, and therefore the first recycle tank 5 has the lowest acid concentration and is also the recycle tank for the waste acid. Once the strip is temporarily stopped, the acid liquor in the acid tank can be discharged into the corresponding circulating tank.
As shown in fig. 2, an acid squeezing roller 11 is located at the rear end of the fourth acid tank 4 for squeezing out hydrochloric acid on the surface of the strip steel. And an acid spraying beam 24 communicated with the fourth circulating tank 8 is arranged above the front part of the acid extruding roller 11, acid is sprayed to the strip steel through an acid spraying nozzle, acid washing turbulence is formed on the surface of the strip steel, and the acid washing efficiency is improved. The bottom of the rear section of the fourth acid tank 4 is provided with an acid discharge pipeline 25, the acid discharge pipeline 25 is a tee joint, two outlets are provided with a circulating valve and a sewage discharge valve which respectively control two paths, the circulating valve controls the hydrochloric acid containing water to enter the first circulating tank 5, and the sewage discharge valve directly discharges the waste acid containing water into the waste water tank. In the normal production process, the blow-down valve is closed.
The pre-rinsing section is arranged between an acid squeezing roller 11 of a fourth acid tank 4 of the acid-washing section and a five-stage rinsing section 12, and the pre-rinsing section comprises: the pre-rinsing tank 14, the pre-rinsing tank cover plate 15, the water spray beam 16, the waste water pipeline 17 and the wringing roller 18. The pre-rinse tank 14 has a front apron 19 at the front end and a rear apron 20 at the rear end. The purpose of the pre-rinsing tank cover plate 15 is to prevent the acid mist from overflowing and polluting the environment. The water spray beams 16 include an upper water spray beam and a lower water spray beam, and are aimed at washing away a large amount of hydrochloric acid remaining on the surface of the strip steel with water. The wastewater pipeline 17 discharges acid-containing wastewater to a wastewater tank. The wringing rollers 18 wring out a large amount of water from the surface of the strip. The length of the pre-rinsing tank cover plate 15 is longer than that of the pre-rinsing tank 14, and the lower part of the pre-rinsing tank cover plate is provided with a front baffle plate 22 and a rear baffle plate 22 of an acid squeezing roller at positions corresponding to the acid squeezing rollers 11 of the fourth acid tank 4, so that a large amount of acid is prevented from flowing into the pre-rinsing section in the pre-rinsing tank and not entering the pickling section, and rinsing water can be prevented from entering the acid tank to dilute the concentration of the acid liquor. A front baffle plate 23 and a rear baffle plate 23 of the wringing roller are arranged at the lower part of the pre-rinsing tank cover plate 15 corresponding to the wringing roller 18, so as to prevent a large amount of water from entering a tank body where the five-stage rinsing section 12 is positioned.
The above recycle tank and acid tank form two pickling cycles: a large pickling cycle and a small pickling cycle.
Acid washing major cycle: the acid liquor in the circulating tank is heated by a graphite heater through a pump and a pipeline and pumped into the corresponding acid tank, and then returns to the circulating tank from the acid tank to form a large circulation of acid washing.
Acid washing and small circulation: the acid liquor in the circulating tank is heated by the graphite heater through the pump and the pipeline, and then does not pass through the acid tank, and directly returns to the circulating tank from another pipeline, so that the process is called as a small pickling circulating system.
The acid washing and draining combined structure is related as shown in figure 1:
the acid outlet of the first circulating tank 5 is connected with the acid inlet of the first acid tank 1 through an acid outlet channel, and the acid outlet of the first acid tank 1 is connected with the acid inlet of the first circulating tank 5 through a pipeline with an acid discharging valve. The specific acid outlet channel is as follows: an acid outlet of the first circulating tank 5 enters the first acid tank 1 through a pipeline via an acid washing pump 9 and a graphite heater 10, and an acid supplementing valve is arranged between the graphite heater 10 and the first acid tank 1. An acid washing small circulation branch is arranged between the graphite heater 10 and the acid supplementing valve and is connected with an acid inlet of the first circulation tank 5 through the small circulation valve. According to specific working conditions, a plurality of pickling large circulation branches are additionally arranged between the pickling pump 9 and the graphite heater 10 of the acid outlet channel and connected with the acid inlet of the first acid tank 1, and the graphite heater 10 is arranged on the pickling large circulation branches.
An acid outlet of the second circulating tank 6 is connected with an acid inlet of the second acid tank 2 through an acid outlet channel, and an acid outlet of the second acid tank 2 is connected with an acid inlet of the second circulating tank 6 through a pipeline with an acid discharge valve. The specific acid outlet channel is as follows: an acid outlet of the second circulation tank 6 enters the second acid tank 2 through a pickling pump and a graphite heater through a pipeline, an acid supplementing valve is arranged between the graphite heater and the second acid tank 2, and a pickling small circulation branch is arranged between the graphite heater and the acid supplementing valve and is connected with an acid inlet of the second circulation tank 6 through a small circulation valve. According to specific working conditions, an acid washing large circulation branch is additionally arranged between the acid washing pump of the acid outlet channel and the graphite heater and is connected with the acid inlet of the second acid tank 2. In the optimization scheme, the graphite heaters in the acid outlet channel are connected in parallel in two ways.
The connection relationship between the third circulation tank 7 and the third acid tank 3 and between the fourth circulation tank 8 and the fourth acid tank 4 is the same as that between the second circulation tank 6 and the second acid tank 2, and will not be described again.
The fourth circulating tank 8, the third circulating tank 7, the second circulating tank 6 and the first circulating tank 5 are connected in series through a pipeline with an acid valve. The fourth circulation tank 8 is connected with an acid adding passage through an acid valve, and is also provided with a self-circulation passage, namely a self-circulation acid outlet is connected with the acid adding passage through an acid washing pump. The first circulation tank 5 is connected to an acid discharge path through an acid valve.
And a liquid level meter is arranged in each circulation tank. There is a conductivity meter between the first recycle tank 5 and the acid drain path acid valve. A conductivity meter is arranged between the fourth circulation tank 8 and the acid valve of the acid inlet path.
The data of the liquid level meter and the conductivity meter are in data connection with a central control system, and the acid discharge valve, the acid supplementing valve, the small circulation valve and the acid valve are controlled to be opened and closed remotely by the central control system. The hardware connection and software configuration of the central control system are set in the prior art, and the specific data processing mode is different according to different suppliers, which are well known in the art and will not be described again here.
The utility model discloses a hardware connection is as above, when specifically using, in the pickling macrocycle: and performing combined drainage and combined compensation according to the pickling requirement of the steel grade by taking the data of the liquid level meter and the conductivity meter as the basis. The acid discharging and supplementing process is realized by opening and closing acid valves of the acid adding passage and the acid discharging passage. In the optimization scheme, the linkage process is realized by an automatic control program, and the specific realization mode is that parameter setting can be automatically added into the existing automatic valve control program without manual intervention or introduction of new software. Wherein the conductivity of the acid liquor is measured on line by a conductivity instrument in the acid tank. The acid discharge valve can be automatically closed during small pickling circulation, and meanwhile, the small circulation valve is opened, and is generally used for roll changing and other operations.
It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a ally oneself with and mend pickling rinsing unit of antithetical couplet with rinse section in advance, includes pickling section and rinse section, its characterized in that: also comprises a pre-rinsing section; the acid washing section comprises a first acid tank, a second acid tank, a third acid tank, a fourth acid tank, a first circulating tank, a second circulating tank, a third circulating tank and a fourth circulating tank; acid liquor circulation exists between the acid tanks and the circulation tanks with the same labels; the fourth circulating tank, the third circulating tank, the second circulating tank and the first circulating tank are connected in series through a pipeline with an acid valve; the first circulating tank is connected with an acid discharging passage through an acid valve; the fourth circulating tank is connected with an acid adding passage through an acid valve; the rear end of the fourth acid tank is provided with an acid squeezing roller, the front upper part of the acid squeezing roller is provided with an acid spraying beam communicated with a fourth circulating tank, the bottom of the rear section of the fourth acid tank is provided with a three-way acid discharging pipeline, and two outlets of the three-way acid discharging pipeline are provided with a circulating valve and a sewage discharging valve; the pre-rinsing section is arranged between the acid squeezing roller of the fourth acid tank of the acid-washing section and the rinsing section, and the pre-rinsing section comprises: the device comprises a pre-rinsing tank, a pre-rinsing tank cover plate, a water spray beam, a waste water pipeline and a water squeezing roller; the front end of the pre-rinsing tank is provided with a front baffle, and the rear end of the pre-rinsing tank is provided with a rear baffle; the length of the pre-rinsing tank cover plate is longer than that of the pre-rinsing tank, a front and a rear acid squeezing roller baffle plates are arranged at the lower part of the pre-rinsing tank cover plate corresponding to the acid squeezing roller of the fourth acid tank, and a front and a rear water squeezing roller baffle plates are arranged at the lower part of the pre-rinsing tank cover plate corresponding to the water squeezing roller.
2. The in-line replenishment pickling and rinsing unit with the pre-rinsing section according to claim 1, characterized in that: the acid tanks are separated from each other by a pair of acid squeezing rollers.
3. The in-line replenishment pickling and rinsing unit with the pre-rinsing section according to claim 1, characterized in that: the fourth circulation tank also comprises a self-circulation passage, and the self-circulation passage is formed by connecting a self-circulation acid outlet with the acid adding passage through an acid washing pump.
4. The in-line replenishment pickling and rinsing unit with the pre-rinsing section according to claim 1, characterized in that: and a liquid level meter is arranged in each circulation tank.
5. The in-line replenishment pickling and rinsing unit with the pre-rinsing section according to claim 1, characterized in that: a conductivity meter is arranged between the first circulating tank and the acid valve of the acid discharging passage; and a conductivity meter is arranged between the fourth circulation tank and the acid valve of the acid inlet passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922109921.2U CN210856355U (en) | 2019-11-30 | 2019-11-30 | Row allies oneself with mends pickling rinsing unit with rinsing section in advance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922109921.2U CN210856355U (en) | 2019-11-30 | 2019-11-30 | Row allies oneself with mends pickling rinsing unit with rinsing section in advance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210856355U true CN210856355U (en) | 2020-06-26 |
Family
ID=71301309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922109921.2U Expired - Fee Related CN210856355U (en) | 2019-11-30 | 2019-11-30 | Row allies oneself with mends pickling rinsing unit with rinsing section in advance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210856355U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992331A (en) * | 2020-09-01 | 2020-11-27 | 安徽南玻石英材料有限公司 | Continuous pickling production method and production equipment for quartz sand |
-
2019
- 2019-11-30 CN CN201922109921.2U patent/CN210856355U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111992331A (en) * | 2020-09-01 | 2020-11-27 | 安徽南玻石英材料有限公司 | Continuous pickling production method and production equipment for quartz sand |
| CN111992331B (en) * | 2020-09-01 | 2022-03-01 | 安徽南玻石英材料有限公司 | Continuous pickling production method and production equipment for quartz sand |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 Termination date: 20201130 |