CN215366009U - Hydrogen distribution platform steady voltage emptying devices - Google Patents
Hydrogen distribution platform steady voltage emptying devices Download PDFInfo
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- CN215366009U CN215366009U CN202121618380.7U CN202121618380U CN215366009U CN 215366009 U CN215366009 U CN 215366009U CN 202121618380 U CN202121618380 U CN 202121618380U CN 215366009 U CN215366009 U CN 215366009U
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- emptying
- pressure
- hydrogen
- regulating valve
- assembly
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 55
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 55
- 238000009826 distribution Methods 0.000 title claims abstract description 33
- 125000004435 hydrogen atom Chemical class [H]* 0.000 title 1
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 38
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims description 57
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 4
- 238000007599 discharging Methods 0.000 claims 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 abstract description 15
- 239000003513 alkali Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The present invention belongs to the field of chlor-alkali industry. Based on the problem that the liquid chlorine product is increased due to the fact that the hydrogen emptying amount of the existing hydrogen distribution table is too large, the utility model discloses a hydrogen distribution table pressure-stabilizing emptying device which comprises a first emptying assembly; a second emptying assembly and a DCS control system; the first emptying assembly and the second emptying assembly are connected in parallel, and the emptying amount of the second emptying assembly is smaller than that of the first emptying assembly; first evacuation subassembly and second evacuation subassembly all with DCS control system electricity is connected, and normal operating, wherein, when first evacuation subassembly begins work, the pressure of hydrogen distribution platform is higher than when the subassembly is evacuated to the second completely the pressure of hydrogen distribution platform. The emptying device can reduce the emptying amount of hydrogen and improve the resource utilization rate on the premise of keeping the pressure of the hydrogen distribution table stable; furthermore, the method is beneficial to chlorine gas balance, reduces the yield of liquid chlorine and ensures the safety and stability of production.
Description
Technical Field
The utility model belongs to the field of chlor-alkali industry, and particularly relates to a hydrogen distribution table pressure-stabilizing emptying device.
Background
Sodium hydroxide (NaOH), chlorine (Cl2) and hydrogen (H2) are industrially prepared by the method of electrolyzing saturated sodium chloride solution, and a series of chemical products are produced by using the sodium hydroxide, chlorine (Cl2) and hydrogen as raw materials, which is called chlor-alkali industry. The chlor-alkali industry is one of the most basic chemical industries and its products are widely used in the light industry, textile industry, metallurgical industry, petrochemical industry and utilities, in addition to the chemical industry itself.
Only a small part of hydrogen generated by the existing chlor-alkali production line is used for producing hydrogenated products, and most of the rest hydrogen is discharged into the atmosphere, so that the waste of resources is caused; meanwhile, the liquid chlorine products are greatly increased, and the sale is difficult; further, liquid chlorine as a dangerous chemical is forbidden to be transported in holidays, and the liquid chlorine cannot be sold outside, so that the load reduction operation of the ion membrane electrolysis on a production line is caused, and the safety and the stability of the production are not facilitated.
SUMMERY OF THE UTILITY MODEL
Based on the problem of excessive liquid chlorine products caused by large hydrogen discharge capacity of the existing chlor-alkali industrial production line, the utility model aims to provide a hydrogen distribution table pressure-stabilizing emptying device for reducing the discharge capacity of hydrogen.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a hydrogen distribution station pressure-stabilizing emptying device comprises:
a first evacuation component; a second evacuation assembly;
the first emptying assembly and the second emptying assembly are connected in parallel, and the emptying amount of the second emptying assembly is smaller than that of the first emptying assembly.
When the first emptying assembly starts to work, the pressure of the hydrogen distribution platform is higher than that when the second emptying assembly is completely emptied.
In one technical scheme disclosed by the utility model, the device further comprises a DCS control system, the first emptying assembly and the second emptying assembly are electrically connected with the DCS control system, and the working value of the second emptying assembly set in the DCS control system is lower than the set value of the first emptying assembly.
In one of the technical solutions disclosed in the present invention, the first evacuation assembly includes a first pressure regulating valve; which is controlled by the DCS control system.
In one of the technical solutions disclosed in the present invention, the first evacuation assembly further includes two butterfly valves respectively connected to the air inlet and the air outlet of the first pressure regulating valve.
In one of the technical solutions disclosed in the present invention, the two butterfly valves are both connected to the first pressure regulating valve through a concentric reducer.
In one of the technical solutions disclosed in the present invention, the second evacuation assembly includes a second pressure regulating valve; which is controlled by the DCS control system.
In one of the technical solutions disclosed in the present invention, the second evacuation assembly further includes two stop valves respectively connected to the air inlet and the air outlet of the second pressure regulating valve.
In one of the technical solutions disclosed in the present invention, the two stop valves are connected to the second pressure regulating valve through concentric reducer pipes.
As can be seen from the above description, the beneficial effects of the present invention are:
the first emptying assembly and the second emptying assembly which have the same emptying amount and are connected in parallel can reduce the emptying amount of hydrogen and improve the resource utilization rate on the premise of keeping the pressure of the hydrogen distribution table stable; furthermore, the method is beneficial to chlorine gas balance, reduces the yield of liquid chlorine and ensures the safety and stability of production.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1-a first evacuation assembly; 11-a first butterfly valve; 12-a first pressure regulating valve; 13-a second butterfly valve; 2-a second evacuation assembly; 21-a second pressure regulating valve; 22-a first shut-off valve; 23-a second stop valve; 3-concentric reducing pipe.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Based on the problem of excessive liquid chlorine products caused by large hydrogen discharge capacity of the existing chlor-alkali industrial production line, the utility model discloses a hydrogen distribution table pressure stabilizing and emptying device, which is used for reducing the hydrogen discharge capacity, and the structure of the hydrogen distribution table pressure stabilizing and emptying device is shown in figure 1 and comprises a first emptying component 1 and a second emptying component 2; the first emptying assembly 1 and the second emptying assembly 2 are connected in parallel, and the emptying amount of the first emptying assembly 1 is larger than that of the second emptying assembly 2.
When the first evacuation assembly starts to operate, the pressure of the hydrogen distribution platform is higher than that of the hydrogen distribution platform when the second evacuation assembly is completely evacuated, that is, the second evacuation assembly 2 starts to operate first, and when the second evacuation assembly 2 is completely evacuated, the pressure of the hydrogen distribution platform is continuously increased, and the first evacuation assembly 1 starts to operate.
Specifically, the first evacuation assembly 1 has a first butterfly valve 11, a first pressure regulating valve 12, and a second butterfly valve 13.
Wherein, all connect through concentric reducing pipe 3 between first butterfly valve 11, the second butterfly valve 13 and the first pressure regulating valve 12.
The second evacuation assembly 2 is connected in parallel with the first evacuation assembly 1 and has a second pressure regulating valve 21, a first shut-off valve 22 and a second shut-off valve 23.
The first stop valve 22, the second pressure regulating valve 21, and the second stop valve 23 are connected in this order and connected by the concentric reducing pipe 3.
Because the opening of the regulating valve is required to be kept more than 15% in order to ensure that the work of the regulating valve is always in a regulating linear region. By adopting the structure, when the pipeline pressure reaches a certain value, the second pressure regulating valve 21 starts to work, and the opening degree of the second pressure regulating valve 21 is regulated along with the pressure of the hydrogen distribution platform; when the opening degree of the second pressure valve 21 reaches 100%, if the pressure of the hydrogen distribution platform continues to rise, the first pressure regulating valve 12 is opened, and redundant hydrogen is discharged from the first pressure regulating valve 12, so that the pressure of the hydrogen distribution platform can be ensured to be stable, and meanwhile, the waste of hydrogen can be reduced.
As a preferable aspect of the present embodiment, a DCS control system, i.e., a distributed control system (not shown in the drawings), is further included for controlling and adjusting the operation and opening degrees of the first pressure regulating valve 12 and the second pressure regulating valve 21, and the second pressure regulating valve 21 is set in the DCS control system to start operating at a pressure value lower than that of the first pressure regulating valve 12, i.e., the second pressure regulating valve 21 starts operating before the first pressure regulating valve 12. The DCS control system is provided with automatic and manual modes. When in the manual mode, the degree of opening of the first and second pressure regulating valves 12, 21 may be manually adjusted using "+" or "+" signs in the DCS control system; when the automatic regulating valve is in an automatic mode, the opening and the work of the two regulating valves can be automatically regulated according to the pressure of the pipeline.
The working principle of the embodiment of the utility model is as follows:
during the starting process, subsequent systems such as synthesis, hydrochloric acid and the like are not started, hydrogen generated by electrolysis can only be emptied from a hydrogen distribution table, nitrogen and water vapor are mixed in the hydrogen, the emptying amount is large, only the first pressure regulating valve 12 can be used as an emptying control valve, at the moment, the first pressure regulating valve 12 is in an automatic mode, and a working value is set in a DCS (distributed control system); the second pressure regulating valve 21 is in the manually closed state. With the start of the subsequent system, the hydrogen evacuation amount is gradually reduced, and the evacuation control valve is switched to the second pressure regulating valve 21; after normal operation, the second pressure regulating valve 21 and the first pressure regulating valve 12 are both in an automatic mode, a set value of the second pressure regulating valve 21 in the DCS control system is smaller than a set value of the first pressure regulating valve 12, when the pressure of the hydrogen distribution platform rises, the second pressure regulating valve 21 is opened, when the opening degree reaches 100%, the pressure still continues to rise to the set value of the first pressure regulating valve 12, the first pressure regulating valve 12 is opened, redundant hydrogen is discharged to the atmosphere from the first emptying assembly 1, and the pressure of the hydrogen distribution platform is guaranteed to be stable.
Taking the Yongxiang resin company as an example, a production line is designed according to 15 ten thousand tons of ionic membrane caustic soda and 10 ten thousand tons of PVC, and when PVC and hydrochloric acid are produced, hydrogen chloride is synthesized according to the weight percentage: chlorine is 1: 1.05-1.1 molar ratio. The existing hydrogen distribution station has only the first vent assembly 1, and the first pressure regulating valve 12 is adjusted according to a set pressure value.
The first butterfly valve 11 and the first pressure regulating valve 12 are connected by a concentric reducer of DN150 × 80.
The second butterfly valve 13 and the first pressure regulating valve 12 are connected by two concentric reducer pipes, one of which is DN100 x 80 and the other is DN150 x 100.
In order to ensure that the first pressure control valve 12 operates in the control linear region, it is necessary to ensureWhen the opening degree of the first pressure regulating valve 12 is larger than 15%, the discharge amount of hydrogen gas is 440Nm when the opening degree is 15%, which is calculated from the characteristic curve of the regulating valve3/h。
Based on the first emptying assembly 1, a second emptying assembly 2 is connected in parallel.
Specifically, the second pressure regulating valve 21 is a regulating valve of DN 40.
The first stop valve 22 and the second stop valve 23 are both connected to the second pressure regulating valve 21 via a concentric reducer of DN80 × 40.
By adopting the structure, the hydrogen emptying rate can be reduced to 150Nm under the premise of keeping the pressure of the hydrogen distribution table stable3And about/h. The hydrogen per standard side is calculated according to 0.75 yuan, 8000 hours per year, 290X 0.75X 8000N 17.4 yuan per year can be saved; meanwhile, according to the hydrogen-chlorine ratio of 1.1: 1, the liquid chlorine yield can be reduced by about 20 tons per day.
As can be seen from the above description, the beneficial effects of the present invention are:
the hydrogen emptying amount can be reduced on the premise of keeping the pressure of the hydrogen distribution table stable, and the resource utilization rate is improved; furthermore, the method is beneficial to chlorine gas balance, reduces the yield of liquid chlorine and ensures the safety and stability of production.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A stabilized pressure evacuation device for a hydrogen distribution table, comprising:
the first emptying assembly is connected with the hydrogen distribution table and is used for discharging hydrogen;
the second emptying component is used for discharging hydrogen and is connected with the first emptying component in parallel, and the emptying amount of the second emptying component is smaller than that of the first emptying component;
wherein, when the first emptying assembly starts to work, the pressure of the hydrogen distribution platform is higher than that when the second emptying assembly is completely emptied.
2. The stabilized pressure evacuation device of a hydrogen distribution station of claim 1, further comprising a DCS control system for controlling the operation of the first and second evacuation assemblies.
3. The stabilized pressure evacuation device of claim 2, wherein the first evacuation assembly comprises a first pressure regulating valve; wherein the DCS control system controls the operation of the first pressure regulating valve.
4. The pressure-stabilized evacuation device of claim 3, wherein the first evacuation assembly further comprises two butterfly valves respectively connected to the gas inlet and the gas outlet of the first pressure regulating valve.
5. The pressure-stabilized evacuation device of claim 4, wherein both butterfly valves are connected to the first pressure regulating valve by concentric reducer pipes.
6. The stabilized evacuation device of hydrogen distribution station of claim 2, wherein the second evacuation assembly comprises a second pressure regulating valve; wherein the DCS control system controls the operation of the second pressure regulating valve.
7. The pressure-stabilizing evacuation device for a hydrogen distribution platform of claim 6, wherein the second evacuation assembly further comprises two stop valves respectively connected to the gas inlet and the gas outlet of the second pressure regulating valve.
8. The pressure-stabilized emptying device of a hydrogen distribution platform as claimed in claim 7, wherein the two shut-off valves are both connected with the second pressure regulating valve by concentric reducer pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121618380.7U CN215366009U (en) | 2021-07-16 | 2021-07-16 | Hydrogen distribution platform steady voltage emptying devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121618380.7U CN215366009U (en) | 2021-07-16 | 2021-07-16 | Hydrogen distribution platform steady voltage emptying devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215366009U true CN215366009U (en) | 2021-12-31 |
Family
ID=79609604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121618380.7U Active CN215366009U (en) | 2021-07-16 | 2021-07-16 | Hydrogen distribution platform steady voltage emptying devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215366009U (en) |
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2021
- 2021-07-16 CN CN202121618380.7U patent/CN215366009U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240617 Address after: 614899 Yongxiang Road, Zhu Gen Town, Wu Tong Qiao District, Leshan, Sichuan, 96 Patentee after: Sichuan Yongxiang Resin Co.,Ltd. Country or region after: China Address before: No.96 Yongxiang Road, Zhugen Town, Wutongqiao District, Leshan City, Sichuan Province Patentee before: SICHUAN YONGXIANG Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |