CN215713403U - Yield increasing mechanism of large pickling line - Google Patents
Yield increasing mechanism of large pickling line Download PDFInfo
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- CN215713403U CN215713403U CN202122175943.6U CN202122175943U CN215713403U CN 215713403 U CN215713403 U CN 215713403U CN 202122175943 U CN202122175943 U CN 202122175943U CN 215713403 U CN215713403 U CN 215713403U
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Abstract
The utility model provides a yield increasing mechanism of a large pickling line, which comprises a pickling tank, an acid liquor circulating tank and an overflow tank, wherein the pickling tank is circularly connected with the acid liquor circulating tank, the pickling tank is connected with 4 pipelines through an acid return port, the 4 pipelines are converged and connected with an inlet of the acid liquor circulating tank, and an outlet of the acid liquor circulating tank conveys acid liquor into the pickling tank through a circulating pipeline, a circulating pump, a heater and an acid injection port; surrounding and blocking stones are arranged on two sides of the pickling tank, overflow of an outlet of the pickling tank overflows the surrounding and blocking stones and respectively flows into overflow grooves on two sides, and the overflow grooves on the two sides are respectively connected with the acid liquor circulation tank through a pipeline five and a pipeline six; the 4 pipelines are respectively a pipeline I, a pipeline II, a pipeline III and a pipeline IV, manual butterfly valves are arranged on the pipeline I and the pipeline IV and are in a normally closed state, so that the acid liquor backflow speed is reduced by half, and the time for filling the acid liquor into the pickling tank is shortened. The utility model can shorten the filling time of the pickling tank and improve the production efficiency.
Description
Technical Field
The utility model relates to the technical field of strip steel surface cleaning, in particular to a yield increasing mechanism of a large pickling line.
Background
In the prior art, before pickling, acid liquor is injected into a pickling tank, and simultaneously the acid liquor is returned to a circulating tank, wherein the return flow rate is less than the injection flow rate. After the pickling tank is filled, the strip steel is operated, and pickling is completed in acid liquor. Stopping the machine for more than 10 minutes, stopping the circulating pump, and emptying acid liquor in the pickling tank to prevent the strip steel from being over-pickled. The acid liquor can be subjected to reflux design (the design aims at prolonging the time of filling the acid liquor into the acid tank before the start of the unit because the acid tank does not fill the acid liquor into the acid tank any more after the circulating pump is stopped and the acid liquor in the acid tank is automatically emptied by gravity).
SUMMERY OF THE UTILITY MODEL
According to the technical problems, a yield increasing mechanism of a large pickling line is provided. The manual butterfly valves are arranged on the first pipeline and the fourth pipeline, or the control valves are respectively arranged on the first pipeline, the second pipeline, the third pipeline and the fourth pipeline, so that the filling time of the pickling tank is shortened, and the production efficiency is improved. The technical means adopted by the utility model are as follows:
a yield increasing mechanism of a large pickling unit comprises a pickling tank, an acid liquor circulation tank and overflow tanks arranged on two sides of the pickling tank, wherein the pickling tank is in circulation connection with the acid liquor circulation tank, the pickling tank is connected with one ends of 4 pipelines through an acid return port, the other ends of the 4 pipelines are converged and connected with an inlet of the acid liquor circulation tank, an outlet of the acid liquor circulation tank conveys acid liquor into the pickling tank through a circulation pipeline, a circulation pump, a heater and an acid injection port, strip steel is pickled, the number of the circulation pipelines is two, namely a pipeline seven and a pipeline eight, and each circulation pipeline is provided with the circulation pump and the heater; surrounding and blocking stones are arranged on two sides of the pickling tank, overflow of an outlet of the pickling tank overflows the surrounding and blocking stones and respectively flows into overflow grooves on two sides, and the overflow grooves on the two sides are respectively connected with the acid liquor circulation tank through a pipeline five and a pipeline six;
the 4 pipelines are respectively a pipeline I, a pipeline II, a pipeline III and a pipeline IV, manual butterfly valves are arranged on the pipeline I and the pipeline IV and are in a normally closed state, so that the acid liquor backflow speed is reduced by half, and the time for filling the acid liquor into the pickling tank is shortened.
Further, the manual butterfly valves on the pipeline I and the pipeline IV are replaced by the control valve I and the control valve IV which are connected in series respectively, the pipeline II and the pipeline III are connected in series respectively, the opening and closing states of the 4 control valves are controlled by the liquid level detection controller LIC, the pickling tank is opened after being filled with acid liquor, the pickling tank is closed after emptying the acid liquor, the pickling tank filling time is shortened, the machine is stopped, the emptying time of the pickling tank cannot be prolonged, and the control valves are closed only before the pickling tank is filled with the acid liquor.
Further, the acid liquor flow rate is injected into the pickling tank: 378m3H, acid liquid return flow rate: 94.5m3H; the pickling tank is filled for a time: 3.33 minutes, pickling bath emptying time: for 10 minutes.
Further, the acid liquor flow rate is injected into the pickling tank: 378m3The acid liquor return flow rate before the pickling tank is full: 0m3H; the pickling tank is filled for a time: 2.5 minutes, pickling tank emptying time at shutdown: for 5 minutes.
Compared with the prior art, the utility model has the following advantages:
1. the yield increasing mechanism of the large pickling line provided by the utility model shortens the waiting time for filling the pickling tank with the acid liquor before the unit is started each time under the condition that the capacity of the circulating pump is not changed, namely the flow rate of the injected acid liquor is not changed, thereby improving the production efficiency of the unit.
2. The yield increasing mechanism of the large pickling line provided by the utility model is easy to implement, low in investment, quick in effect, remarkable in benefit and capable of producing more than 3 million tons every year.
For the above reasons, the present invention can be widely applied to the field of shortening the filling time of the pickling tank.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure: 1. a first pipeline; 2. a second pipeline; 3. a third pipeline; 4. a fourth pipeline; 5. an acid liquor circulation tank; 6. a pickling tank; 7. a fence stone; 8. an acid injection port; 9. returning acid; 10. an overflow trough; 11. a manual butterfly valve; v1, a first control valve; v2 and a control valve II; v3 and a third control valve; v4 and a control valve IV; b1, pipeline five; b2, pipeline six; f1, line seven; f2, line eight.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the figure, the utility model provides a yield increasing mechanism of a large pickling line, which comprises a pickling tank 6, an acid liquor circulating tank 5 and overflow tanks 10 arranged on two sides of the pickling tank 6, wherein the pickling tank 6 is circularly connected with the acid liquor circulating tank 5, the pickling tank 6 is connected with one ends of 4 pipelines through an acid return port 9, the other ends of the 4 pipelines are converged and connected with an inlet of the acid liquor circulating tank 5, an outlet of the acid liquor circulating tank 5 conveys acid liquor into the pickling tank 6 through a circulating pipeline, a circulating pump, a heater and an acid injection port 8, the strip steel is pickled, the circulating pipelines are two, namely a pipeline seven F1 and a pipeline eight F2, and each circulating pipeline is provided with the circulating pump and the heater; the two sides of the pickling tank 6 are provided with the enclosure stones 7, the overflow of the outlet of the pickling tank 6 overflows the enclosure stones 7 and respectively flows into the overflow chutes 10 on the two sides, and the overflow chutes 10 on the two sides are respectively connected with the acid liquor circulating tank 5 through a pipeline five B1 and a pipeline six B2;
the 4 pipelines are respectively a pipeline I1, a pipeline II 2, a pipeline III 3 and a pipeline IV 4, manual butterfly valves 11 are arranged on the pipeline I1 and the pipeline IV 4 and are in a normally closed state, so that the acid liquor backflow speed is reduced by half, and the time for filling the acid liquor in the pickling tank 6 is shortened.
As a preferable embodiment, the manual butterfly valves 11 on the first pipeline and the fourth pipeline are respectively replaced by a first control valve V1 and a fourth control valve V4 which are connected in series, the second control valve V2 and the third control valve V3 are respectively connected in series on the second pipeline 2 and the third pipeline 3, the opening and closing states of the 4 control valves are controlled by a liquid level detection controller LIC, the control valves are opened after the pickling tank 6 is filled with the acid liquor, the control valves are closed after the pickling tank 6 is emptied, the pickling tank filling time is shortened, in addition, in the shutdown process, the emptying time of the pickling tank 6 cannot be prolonged, and the control valves are closed only before the pickling tank 6 is filled with the acid liquor.
Example 1
As shown in fig. 1, a yield increasing mechanism of a large pickling line comprises a pickling tank 6, an acid liquor circulation tank 5 and overflow tanks 10 arranged on two sides of the pickling tank 6, wherein the pickling tank 6 is in circulation connection with the acid liquor circulation tank 5, the pickling tank 6 is connected with one ends of 4 pipelines through an acid return port 9, the other ends of the 4 pipelines are collected and connected with an inlet of the acid liquor circulation tank 5, an outlet of the acid liquor circulation tank 5 conveys acid liquor into the pickling tank 6 through a circulation pipeline, a circulation pump, a heater and an acid injection port 8, the strip steel is pickled, the circulation pipeline is provided with two pipelines which are respectively a pipeline seven F1 and a pipeline eight F2, and each circulation pipeline is provided with the circulation pump and the heater; and enclosing stones 7 are arranged on two sides of the pickling tank 6, the overflow of the outlet of the pickling tank 6 overflows the enclosing stones 7 and respectively flows into overflow chutes 10 on two sides, and the overflow chutes 10 on two sides are respectively connected with the acid liquor circulating tank 5 through a pipeline five B1 and a pipeline six B2.
The 4 pipelines are respectively a pipeline I1, a pipeline II 2, a pipeline III 3 and a pipeline IV 4, manual butterfly valves 11 are arranged on the pipeline I1 and the pipeline IV 4 and are in a normally closed state, so that the acid liquor backflow speed is reduced by half, and the time for filling the acid liquor in the pickling tank 6 is shortened. When the method is stopped, the emptying time of the pickling tank is prolonged and cannot exceed 10 minutes.
Under the condition that the capacity of the circulating pump is not changed, namely the flow rate of the injected acid solution is not changed, the waiting time for filling the acid solution into the pickling tank before the unit is started each time is shortened, and therefore the production efficiency of the unit is improved. The utility model has the advantages of easy implementation, less investment, quick effect, obvious benefit and more than 3 million tons of products per year.
Example 2
As shown in fig. 2, unlike embodiment 1, in this embodiment, a first control valve V1, a second control valve V2, a third control valve V3, and a fourth control valve V4 are respectively connected in series to a first pipeline 1, a second pipeline 2, a third pipeline 3, and a fourth pipeline 4, and the open/close states of the 4 control valves are controlled by a pickling tank liquid level detection controller LIC, and are opened after a pickling tank 6 is filled with acid liquid, and are closed after the acid liquid in the pickling tank 6 is emptied. The acid tank fill time is shorter than the first protocol of example 1. In the method, the emptying time of the pickling tank 6 is not prolonged when the pickling tank is stopped, and the control valve is closed only before the pickling tank 6 is filled.
First, basic parameters of the unit
1. Ability to treat hot rolled sheet: 2382560 tons/year.
2. The annual production time is as follows: 7800 hours. Annual repair is carried out for 360 hours; the fixed repair time is 600 hours.
3. Effective operation rate: 0.8. the machine is stopped for 1560 hours for other reasons besides annual repair and fixed repair.
4. Net production time: 7800 hours × 0.8 ═ 6240 hours.
5. Hourly yield: 2382560 ton/6240 hr/381.82 ton.
6. Volume of the acid tank: 15.75m3。
Secondly, injecting acid liquor in the prior art
1. The flow rate of acid liquor injected into the pickling tank is as follows: 378m3H is used as the reference value. Acid liquor return flow rate: 189m3/h。
2. The pickling tank is filled for a time: for 5 minutes. Emptying time of the pickling tank during shutdown: for 5 minutes.
Third, the first embodiment of the present invention example 1 injects acid solution
1. The flow rate of acid liquor injected into the pickling tank is as follows: 378m3H is used as the reference value. Acid liquor return flow rate: 94.5m3/h。
2. The pickling tank is filled for a time: 3.33 minutes. Emptying time of the pickling tank: for 10 minutes.
Fourth, the second scheme of the embodiment 2 of the utility model injects acid liquor
1. The flow rate of acid liquor injected into the pickling tank is as follows: 378m3H is used as the reference value. Acid liquor return flow rate before acid tank is full: 0m3/h。
2. The pickling tank is filled for a time: 2.5 minutes. Emptying time of the pickling tank during shutdown: for 5 minutes.
Number of stops of more than 10 minutes per year
In 1560 hours of the machine halt time except for fixed maintenance and annual maintenance, if the machine halt time is 1 hour on average, 1560 times are carried out; if on average each shut down for half an hour, 3120 times. The shut-down was considered 2 per shift and 1950 annual shut-downs. The combination gives 2210 stoppages, on average 42.353 minutes per stoppages, and on average 6.8 stoppages per day, which is closer to reality.
Comparative example:
first, benefits of the first aspect of embodiment 1 of the present invention
1. The time saved by filling acid liquor all year round: (5-3.33) × 2210 times ÷ 60 minutes ÷ 61.5 hours.
2. Production for many years: 61.5 hours × 381.82 ton/hour 23482 ton.
Second, the benefit of the second aspect of embodiment 2 of the present invention.
1. The time saved by filling acid liquor all year round: (5-2.5). times.2210 ÷ 60 minutes ÷ 92.08 hours.
2. Production for many years: 92.08 hr × 381.82 ton/hr 35158 ton.
The utility model compares the table with the prior art:
finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. The yield increasing mechanism of the large pickling line is characterized by comprising a pickling tank (6), an acid liquor circulating tank (5) and overflow tanks (10) arranged on two sides of the pickling tank (6), wherein the pickling tank (6) is circularly connected with the acid liquor circulating tank (5), the pickling tank (6) is connected with one ends of 4 pipelines through an acid return port (9), the other ends of the 4 pipelines are converged and connected with an inlet of the acid liquor circulating tank (5), an outlet of the acid liquor circulating tank (5) conveys acid liquor into the pickling tank (6) through a circulating pipeline, a circulating pump, a heater and an acid injection port (8), strip steel is pickled, the circulating pipelines are two, namely a pipeline seven (F1) and a pipeline eight (F2), and each circulating pipeline is provided with a circulating pump and a heater; surrounding and blocking stones (7) are arranged on two sides of the pickling tank (6), overflow of the outlet of the pickling tank (6) overflows the surrounding and blocking stones (7) and respectively flows into overflow chutes (10) on two sides, and the overflow chutes (10) on two sides are respectively connected with the acid liquor circulating tank (5) through a pipeline five (B1) and a pipeline six (B2);
the 4 pipelines are respectively a pipeline I (1), a pipeline II (2), a pipeline III (3) and a pipeline IV (4), manual butterfly valves (11) are arranged on the pipeline I (1) and the pipeline IV (4) and are in a normally closed state, so that the acid liquor backflow speed is reduced by half, and the time for filling the acid liquor into the pickling tank (6) is shortened.
2. The yield increasing mechanism of a large pickling line as claimed in claim 1, wherein the manual butterfly valves (11) on the first pipeline and the fourth pipeline are respectively replaced by a first control valve (V1) and a fourth control valve (V4) which are connected in series, the second control valve (V2) and the third control valve (V3) are respectively connected in series on the second pipeline (2) and the third pipeline (3), the opening and closing states of the 4 control valves are controlled by a liquid level detection controller (LIC), the control valves are opened after the pickling tank (6) is filled with the acid liquid, the control valves are closed after the acid liquid in the pickling tank (6) is emptied, the acid tank filling time is shortened, the emptying time of the pickling tank (6) cannot be prolonged during shutdown, and the control valves are closed only before the pickling tank (6) is filled with the acid liquid.
3. Stimulation mechanism for large pickling line according to claim 1 characterized by the fact that the pickling tank (6) is injected with acid flow rate: 378m3H, acid liquid return flow rate: 94.5m3H; the filling time of the pickling tank (6): 3.33 minutes, pickling tank (6) emptying time: for 10 minutes.
4. Stimulation mechanism for large pickling line according to claim 2 characterized by the fact that the pickling tank (6) is injected with acid flow rate: 378m3The acid liquor return flow rate before the pickling tank (6) is full: 0m3H; the filling time of the pickling tank (6): 2.5 minutes, emptying time of the pickling tank (6) during shutdown: for 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122175943.6U CN215713403U (en) | 2021-09-09 | 2021-09-09 | Yield increasing mechanism of large pickling line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122175943.6U CN215713403U (en) | 2021-09-09 | 2021-09-09 | Yield increasing mechanism of large pickling line |
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| Publication Number | Publication Date |
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| CN215713403U true CN215713403U (en) | 2022-02-01 |
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| CN202122175943.6U Active CN215713403U (en) | 2021-09-09 | 2021-09-09 | Yield increasing mechanism of large pickling line |
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- 2021-09-09 CN CN202122175943.6U patent/CN215713403U/en active Active
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