CN109554721B - Acid adding device for reducing yield of electrolysis caused by hydrochloric acid leakage - Google Patents
Acid adding device for reducing yield of electrolysis caused by hydrochloric acid leakage Download PDFInfo
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- CN109554721B CN109554721B CN201910106524.1A CN201910106524A CN109554721B CN 109554721 B CN109554721 B CN 109554721B CN 201910106524 A CN201910106524 A CN 201910106524A CN 109554721 B CN109554721 B CN 109554721B
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- Prior art keywords
- pipeline
- hydrochloric acid
- mixing
- pure water
- auxiliary
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 192
- 239000002253 acid Substances 0.000 title claims abstract description 22
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 210000001503 joint Anatomy 0.000 claims abstract description 4
- 238000012423 maintenance Methods 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention provides an acid adding device for reducing the yield of electrolysis caused by hydrochloric acid leakage, which comprises a hydrochloric acid pipeline, a pure water pipeline, a mixed pipeline and an electrolytic tank, wherein the hydrochloric acid pipeline is provided with a hydrochloric acid flow meter and a flow regulating valve; a flowmeter is arranged on the pure water pipe line; the hydrochloric acid pipeline and the pure water pipeline are connected with the mixing pipeline; a mixer is arranged on the mixing pipeline; the tail end of the mixing pipeline is sequentially connected with the first electrolytic tank, the plurality of middle electrolytic tanks and the last electrolytic tank, and an auxiliary mixing pipeline connected with the mixing pipeline in parallel is also arranged, and the auxiliary mixing pipeline is connected with the last electrolytic tank, so that the butt joint of the auxiliary mixing pipeline and the tail end of the mixing pipeline is realized; an auxiliary mixer is arranged on the auxiliary mixing pipeline; the manual valve is arranged on the hydrochloric acid main pipe between the electrolytic tanks, and the auxiliary mixed pipeline and the mixed pipeline form an annular hydrochloric acid pipeline.
Description
Technical Field
The invention belongs to an anode hydrochloric acid adding process of an electrolytic tank, and particularly relates to an annular acid adding device for reducing the influence of hydrochloric acid leakage on electrolytic yield.
Background
At present, the hydrochloric acid in the electrolytic process of caustic soda production has single and fixed addition form, and the problem of leakage of a hydrochloric acid pipeline is more frequent because of the high corrosiveness of the hydrochloric acid. If the hydrochloric acid main pipe between the electrolytic tanks leaks, the loads of all the electrolytic tanks are required to be adjusted simultaneously, and the acid addition to the electrolytic tanks is stopped, so that maintenance conditions are created for maintenance. The arrangement of such a line is not only detrimental to caustic soda production but also to the stable operation of the electrolyzer.
Disclosure of Invention
The invention aims to solve the problem that the leakage of a hydrochloric acid pipeline influences the production load of an electrolytic cell, and provides a device which realizes the maintenance requirement and does not influence the production load of the electrolytic cell.
An acid adding device for reducing the yield of electrolysis caused by hydrochloric acid leakage comprises a hydrochloric acid pipeline, a pure water pipeline, a mixed pipeline and an electrolytic tank, wherein the hydrochloric acid pipeline is provided with a hydrochloric acid flow meter and a flow regulating valve; a flowmeter is arranged on the pure water pipe line; the hydrochloric acid pipeline and the pure water pipeline are connected with the mixing pipeline; a mixer is arranged on the mixing pipeline; the tail end of the mixing pipeline is sequentially connected with the first electrolytic tank, the plurality of middle electrolytic tanks and the last electrolytic tank, and an auxiliary mixing pipeline connected with the mixing pipeline in parallel is also arranged, and the auxiliary mixing pipeline is connected with the last electrolytic tank, so that the butt joint of the auxiliary mixing pipeline and the tail end of the mixing pipeline is realized; an auxiliary mixer is arranged on the auxiliary mixing pipeline; a manual valve is arranged on the hydrochloric acid main pipe between the electrolytic tanks.
Compared with the prior art, the auxiliary mixing pipeline and the mixing pipeline form an annular hydrochloric acid pipeline, and when a certain point of the hydrochloric acid main pipe between the electrolytic cells leaks, the main pipe can be cut off independently, and hydrochloric acid is supplied to the electrolytic cells behind by the auxiliary mixing pipeline, so that the purpose of not influencing normal acid adding of other electrolytic cells in the maintenance process is achieved, the production load is ensured, and the influence of maintenance on the yield of the electrolytic cells is reduced.
Further:
the hydrochloric acid pipeline is provided with a hydrochloric acid branch pipeline, the pure water pipeline is provided with a pure water branch pipeline, and the hydrochloric acid branch pipeline and the pure water branch pipeline are simultaneously connected with the auxiliary mixing pipeline. The two branch lines are used as standby lines, so that the hydrochloric acid supply to the electrolytic tank is ensured to be maintained when the main line leaks.
Manual valves are respectively arranged on the hydrochloric acid pipeline and the hydrochloric acid branch pipeline, and the two manual valves are in logical OR control relationship.
The hydrochloric acid flow meter on the hydrochloric acid pipeline is provided with a flow meter bypass. When the hydrochloric acid flow meter fails, the normal acid adding amount can be ensured through the bypass and the automatic valve opening of the flow regulating valve.
Drawings
FIG. 1 is a schematic diagram of the structure of an acid adding device of the invention;
FIG. 2 is a schematic diagram of a prior art acid adding device;
FIG. 3 is a schematic view of leak repair.
In the figure: hydrochloric acid line 1, hydrochloric acid flow meter 2, flow regulating valve 3, hydrochloric acid branch line 4, pure water branch line 5, pure water line 6, mixing line 7, mixer 8, auxiliary mixing line 9, auxiliary mixer 10, first electrolytic tank 11, last electrolytic tank 12, flow meter bypass 13, and leakage position 14.
Detailed Description
As shown in fig. 2, the conventional structure is that the hydrochloric acid line 1 and the pure water line 6 are simultaneously led into a mixing line 7, a mixer 8 is arranged on the mixing line 7, the position of the mixer 8 on the tube side is not required, and the mixing line 7 supplies hydrochloric acid solution to each electrolytic cell in sequence. In the prior art, the "one-way supply". When a certain section of pipe between the electrolytic tanks on the main pipe is leaked, the device is required to be shut down integrally for maintenance.
In order to solve the technical problems, the invention greatly reforms the hydrochloric acid solution supply device, redesigns a connecting pipeline, designs a control part by weight, and newly forms a concrete scheme of the hydrochloric acid solution supply device as shown in figure 1.
It should be noted that: in the description of the present invention, terms such as "front," "rear," "left," "right," and the like are used for the purpose of simplifying the description of the arrangement, and are not intended to indicate or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the arrangement of the present invention. In fig. 1, the broken line represents the original line of the acid adding device, and the solid line represents the new line in the present invention.
An acid adding device for reducing the yield of electrolysis caused by hydrochloric acid leakage comprises a hydrochloric acid pipeline 1, a pure water pipeline 6, a mixing pipeline 7 and an electrolytic tank, wherein the hydrochloric acid pipeline 1 is provided with a hydrochloric acid flow meter 2 and a flow regulating valve 3; a flowmeter is arranged on the pure water pipeline 6; the hydrochloric acid pipeline 1 and the pure water pipeline 6 are connected with a mixing pipeline 7; the mixing pipeline 7 is provided with a mixer 8; the tail end of the mixing pipeline 7 is sequentially connected with a first electrolytic tank 11, a plurality of middle electrolytic tanks and a last electrolytic tank 12, and an auxiliary mixing pipeline 9 connected with the mixing pipeline 7 in parallel is also arranged, and the auxiliary mixing pipeline 9 is connected with the last electrolytic tank 12, so that the butt joint of the mixing pipeline 7 and the tail end of the auxiliary mixing pipeline 9 is realized; an auxiliary mixer 10 is arranged on the auxiliary mixing pipeline 9; a manual valve is arranged on the hydrochloric acid main pipe between the electrolytic tanks.
Further, the hydrochloric acid line 1 is provided with a hydrochloric acid branch line 4, the pure water line 6 is provided with a pure water branch line 5, and the two branch lines are used as standby lines, so that a hydrochloric acid supply path to the electrolytic tank is maintained when leakage occurs in the main line. Preferably, manual valves are respectively added on the hydrochloric acid pipeline 1 and the hydrochloric acid branch pipeline 4, and the two manual valves are in a logical OR control relationship.
The auxiliary mixing pipeline has two setting modes:
1. the starting point of the secondary mixing line 9 is designed at the junction of the hydrochloric acid line 1 and the pure water line 6 with the mixing line 7. I.e. the secondary mixing line 9 is homologous to the mixing line 7. The end of the auxiliary mixing line 9 is connected to the last electrolytic tank 12, i.e. the auxiliary mixing line 9 is fed with hydrochloric acid solution from the last electrolytic tank 12 to the first electrolytic tank 11.
2. The auxiliary mixing line 9 is connected to both the hydrochloric acid branch line 4 and the pure water branch line 5. I.e. the auxiliary mixing line 9 is independent from the original manifold.
According to the design concept, the invention improves other positions of the original hydrochloric acid solution supply device, which are easy to break down, specifically: the hydrochloric acid flow meter 2 on the hydrochloric acid line 1 is provided with a flow meter bypass 13. When the hydrochloric acid flow meter 2 fails, the normal acid adding amount can be ensured through the bypass 13 of the flow meter and the automatic valve opening of the flow regulating valve 3.
The acid generator of the present invention is understood in conjunction with fig. 1 and 3, and each electrolytic cell is numbered A, B, C, D, E, F, G, H for ease of description. For example, the leakage occurs at the position 14, manual valves on the left and right sides of the leakage position 14 are closed, and the main pipe and the electrolytic tank E are cut out of the system. The mixing pipeline 7 is used for adding acid from the electrolytic tank A to the direction of the electrolytic tank D; the auxiliary mixing line 9 is activated and acid is added from the electrolyzer H to the electrolyzer F. It can be seen that the present invention only affects the hydrochloric acid supply to one cell, which has a significantly reduced impact on throughput.
The working process of the device when maintaining a certain section of main pipe between hydrolysis tanks is as follows:
hydrochloric acid sent from the synthesis post is sent to a hydrochloric acid pipeline 1, flows through a hydrochloric acid flow meter FIT425 to display the flow value on the pipeline, then passes through a flow regulating valve FCV425, and when the flow meter FIT425 fails, a flow meter bypass 13 is connected, and the flow of the hydrochloric acid is controlled through the flow regulating valve FCV 425.
The flow regulating valve FCV425 is divided into two pipelines, namely an original hydrochloric acid pipeline 1 and a hydrochloric acid branch pipeline 4. They are joined to the pure water line 6 and the pure water branch line 5, respectively, and 31% hydrochloric acid is mixed with water to become 17% hydrochloric acid, which enters the mixing line 7. The hydrochloric acid pipeline is communicated with the hydrochloric acid branch pipeline, and the pure water pipeline is communicated with the pure water branch pipeline for standby.
The mixed pipeline 7 is used for conveying 17% hydrochloric acid mixed by the hydrochloric acid pipeline 1 and the pure water pipeline 6, and acid is sequentially added to each electrolytic tank from the first electrolytic tank 11 to the previous manual valve stop of a maintenance point; the auxiliary mixing pipeline 9 is used for conveying 17% hydrochloric acid mixed by the hydrochloric acid branch pipeline 4 and the pure water branch pipeline 5, and the hydrochloric acid is sequentially added to the electrolytic cells from the last electrolytic cell 12 to a manual valve after a maintenance point.
And closing the manual valves at the two sides of the leakage position to finish the isolation of the main pipe of the maintenance section and the system. The hydrochloric acid pipeline, the hydrochloric acid branch pipeline and the hydrochloric acid manual valve among the electrolytic cells enable the hydrochloric acid to be added with acid from the electrolytic cells at the two ends, and then the added acid is branched to be added into the anode liquid of the corresponding electrolytic cell through the hydrochloric acid pipeline of each electrolytic cell.
The invention has the beneficial effects that: compared with the prior art, the invention adopts the laying of the annular hydrochloric acid pipeline to realize that the pipeline can be cut out when leakage occurs at any position of the hydrochloric acid manifold of the electrolytic tank, and the normal acid adding of other electrolytic tanks is not influenced, thereby ensuring the stable production load and reducing the influence on the yield of the electrolytic tank.
Claims (2)
1. An acid adding device for reducing the yield of electrolysis caused by hydrochloric acid leakage comprises a hydrochloric acid pipeline, a pure water pipeline, a mixed pipeline and an electrolytic tank, wherein the hydrochloric acid pipeline is provided with a hydrochloric acid flow meter and a flow regulating valve; a flowmeter is arranged on the pure water pipe line; the hydrochloric acid pipeline and the pure water pipeline are connected with the mixing pipeline; a mixer is arranged on the mixing pipeline; the tail end of the mixing pipeline is sequentially connected with the first electrolytic tank, a plurality of middle electrolytic tanks and the last electrolytic tank, and is characterized in that: an auxiliary mixing pipeline connected with the mixing pipeline in parallel is also arranged; the hydrochloric acid pipeline is provided with a hydrochloric acid branch pipeline, the pure water pipeline is provided with a pure water branch pipeline, the hydrochloric acid branch pipeline and the pure water branch pipeline are simultaneously connected with an auxiliary mixing pipeline, and the auxiliary mixing pipeline is connected with a last electrolytic tank, so that the butt joint of the auxiliary mixing pipeline and the tail end of the mixing pipeline is realized; an auxiliary mixer is arranged on the auxiliary mixing pipeline, a manual valve is arranged on a hydrochloric acid main pipe between the electrolytic tanks, and a hydrochloric acid flow meter on the hydrochloric acid pipeline is provided with a flow meter bypass.
2. The acid adding device for reducing the yield of electrolysis caused by the leakage of hydrochloric acid according to claim 1, wherein: manual valves are respectively arranged on the hydrochloric acid pipeline and the hydrochloric acid branch pipeline, and the two manual valves are in logical OR control relationship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910106524.1A CN109554721B (en) | 2019-02-02 | 2019-02-02 | Acid adding device for reducing yield of electrolysis caused by hydrochloric acid leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910106524.1A CN109554721B (en) | 2019-02-02 | 2019-02-02 | Acid adding device for reducing yield of electrolysis caused by hydrochloric acid leakage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109554721A CN109554721A (en) | 2019-04-02 |
| CN109554721B true CN109554721B (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910106524.1A Active CN109554721B (en) | 2019-02-02 | 2019-02-02 | Acid adding device for reducing yield of electrolysis caused by hydrochloric acid leakage |
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| Country | Link |
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| CN (1) | CN109554721B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899672A (en) * | 2009-05-25 | 2010-12-01 | 官有文 | Electrolytic system for preparing hypochlorous acid water |
| KR20140103414A (en) * | 2013-02-18 | 2014-08-27 | 동서대학교산학협력단 | Apparatus for manufacturing of hypochlorous acid sloution and thereby aparatus for disinfect medical suction |
| CN104428450A (en) * | 2012-06-25 | 2015-03-18 | 日产自动车株式会社 | Water electrolysis system |
| CN106065484A (en) * | 2016-08-03 | 2016-11-02 | 金川集团股份有限公司 | A kind of ion-exchange membrane electrolyzer anode means for feeding acid and method |
| CN205874555U (en) * | 2016-03-29 | 2017-01-11 | 山东康辉水处理设备有限公司 | Subacidity brineelectrolysis generater |
| CN106521556A (en) * | 2016-11-01 | 2017-03-22 | 攀钢集团钛业有限责任公司 | Magnesium electrolytic cell production line and method of incorporating singly-operating cell into production line |
| CN206127437U (en) * | 2016-09-29 | 2017-04-26 | 内蒙古乌海化工有限公司 | Electrolysis trough water charging system |
| CN209481807U (en) * | 2019-02-02 | 2019-10-11 | 唐山三友氯碱有限责任公司 | Reduce the means for feeding acid that hydrochloric acid leakage causes the electrolysis underproduction |
-
2019
- 2019-02-02 CN CN201910106524.1A patent/CN109554721B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899672A (en) * | 2009-05-25 | 2010-12-01 | 官有文 | Electrolytic system for preparing hypochlorous acid water |
| CN104428450A (en) * | 2012-06-25 | 2015-03-18 | 日产自动车株式会社 | Water electrolysis system |
| KR20140103414A (en) * | 2013-02-18 | 2014-08-27 | 동서대학교산학협력단 | Apparatus for manufacturing of hypochlorous acid sloution and thereby aparatus for disinfect medical suction |
| CN205874555U (en) * | 2016-03-29 | 2017-01-11 | 山东康辉水处理设备有限公司 | Subacidity brineelectrolysis generater |
| CN106065484A (en) * | 2016-08-03 | 2016-11-02 | 金川集团股份有限公司 | A kind of ion-exchange membrane electrolyzer anode means for feeding acid and method |
| CN206127437U (en) * | 2016-09-29 | 2017-04-26 | 内蒙古乌海化工有限公司 | Electrolysis trough water charging system |
| CN106521556A (en) * | 2016-11-01 | 2017-03-22 | 攀钢集团钛业有限责任公司 | Magnesium electrolytic cell production line and method of incorporating singly-operating cell into production line |
| CN209481807U (en) * | 2019-02-02 | 2019-10-11 | 唐山三友氯碱有限责任公司 | Reduce the means for feeding acid that hydrochloric acid leakage causes the electrolysis underproduction |
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| CN109554721A (en) | 2019-04-02 |
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