CN111519208A - Electrolytic cell differential pressure control device and method - Google Patents
Electrolytic cell differential pressure control device and method Download PDFInfo
- Publication number
- CN111519208A CN111519208A CN202010320041.4A CN202010320041A CN111519208A CN 111519208 A CN111519208 A CN 111519208A CN 202010320041 A CN202010320041 A CN 202010320041A CN 111519208 A CN111519208 A CN 111519208A
- Authority
- CN
- China
- Prior art keywords
- value
- pressure
- preset
- pressure difference
- control valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
-
- 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
- C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention relates to an electrolytic tank pressure difference control device and method, which comprises a DCS control system, wherein the DCS control system is used for controlling a first automatic control valve to be opened at a preset speed, a second automatic control valve to be opened to a first preset opening value, a third automatic control valve to be fully opened, a fourth automatic control valve to be opened to a second preset opening value when a tripping signal is obtained, obtaining a pressure difference value of a hydrogen main pipe and a chlorine main pipe according to a pressure value of the hydrogen main pipe and a pressure value of the chlorine main pipe which are monitored in real time, and controlling the opening of the second automatic control valve and the opening of the fourth automatic control valve according to the pressure difference value, the first preset pressure difference value, the second preset pressure difference value, the third preset pressure difference value and the fourth preset pressure difference value. The invention eliminates the risk of the electrolytic cell caused by overlarge pressure difference between the hydrogen main pipe and the chlorine main pipe by adjusting the pressure difference between the chlorine main pipe and the chlorine main pipe, and simultaneously, the pressure difference is kept stable, thereby not causing damage to the ionic membrane and ensuring the safety of the electrolytic cell.
Description
Technical Field
The invention relates to the technical field of electrolytic cells, in particular to a device and a method for controlling the pressure difference of an electrolytic cell.
Background
In the chlor-alkali industry, when an electrolyzer trips, the pressure difference between a hydrogen main and a chlorine main is usually controlled by manually adjusting a chlorine adjusting valve, a hydrogen adjusting valve and the like. The manual control of the opening of each regulating valve is limited by the experience of personnel, and the regulation of the pressure difference is not timely and accurate enough, so that the ionic membrane is damaged, and the safety state of the electrolytic cell is destroyed.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides an electrolytic cell pressure difference control device and method.
The technical scheme for solving the technical problems is as follows:
the electrolytic cell pressure difference control device comprises a chlorine gas main pipe, a hydrogen gas main pipe, a chlorine gas sodium hypochlorite removal absorption main pipe, a hydrogen gas emptying main pipe and an electrolytic cell, wherein the chlorine gas main pipe and the hydrogen gas main pipe are respectively connected with the electrolytic cell;
the first automatic control valve is installed on the chlorine gas main pipe, the second automatic control valve is installed on the hydrogen gas main pipe, the third automatic control valve is installed on the chlorine gas secondary sodium absorption main pipe, and the fourth automatic control valve is installed on the hydrogen gas emptying main pipe;
the first automatic control valve, the second automatic control valve, the third automatic control valve and the fourth automatic control valve are respectively and electrically connected with the DCS control system;
the DCS control system is used for controlling the first automatic control valve to be opened at a preset speed when a tripping signal is obtained, the second automatic control valve is opened to a first preset opening value, the third automatic control valve is completely opened, and the fourth automatic control valve is opened to a second preset opening value;
and according to the pressure value of the hydrogen main pipe and the pressure value of the chlorine main pipe which are monitored in real time, obtaining a pressure difference value of the hydrogen main pipe and the chlorine main pipe, and controlling the opening degree of the second automatic control valve and the opening degree of the fourth automatic control valve according to the pressure difference value, a first preset pressure difference value, a second preset pressure difference value, a third preset pressure difference value and a fourth preset pressure difference value.
The invention has the beneficial effects that: the utility model provides an electrolysis trough pressure difference controlling means, when DCS control system acquires the tripping signal, the aperture of control first automatic control valve, second automatic control valve, third automatic control valve and fourth automatic control valve to reach the regulation to chlorine house steward and hydrogen house steward's pressure difference, eliminated the electrolysis trough because of the too big risk that brings of hydrogen house steward and chlorine house steward pressure difference, pressure difference keeps stable simultaneously, can not cause the damage to the ionic membrane, also guaranteed the safety of electrolysis trough.
On the basis of the technical scheme, the invention can be further improved as follows.
The pressure sensor further comprises a first pressure gauge, a second pressure gauge, a third pressure gauge, a fourth pressure gauge, a fifth pressure gauge and a sixth pressure gauge;
the first pressure gauge, the second pressure gauge and the third pressure gauge are respectively arranged on the chlorine gas header pipe, and the fourth pressure gauge, the fifth pressure gauge and the sixth pressure gauge are respectively arranged on the hydrogen gas header pipe;
the first pressure gauge, the second pressure gauge and the third pressure gauge, and the fourth pressure gauge, the fifth pressure gauge and the sixth pressure gauge are respectively connected with the DCS control system;
the DCS control system is further used for determining a pressure value of the chlorine main pipe according to the pressure value of the first pressure gauge, the pressure value of the second pressure gauge and the pressure value of the third pressure gauge by adopting a two-out-of-three logic;
and/or determining the pressure value of the hydrogen main pipe by adopting a two-out-of-three logic according to the pressure value of the fourth pressure gauge, the pressure value of the fifth pressure gauge and the pressure value of the sixth pressure gauge.
The beneficial effect of adopting the further scheme is that: the DCS control system determines the pressure of the hydrogen main pipe and the pressure of the chlorine main pipe from the plurality of pressure gauges according to the two-out-of-three logic, and can accurately acquire the pressure of the hydrogen main pipe and the pressure of the chlorine main pipe.
Further, the DCS control system is further configured to adjust the fourth self-control valve to be opened to a third preset opening value when the pressure difference is greater than the first preset pressure difference;
and/or when the pressure difference value is smaller than a second preset pressure difference value, adjusting the fourth automatic control valve to be opened to a fourth preset opening value, wherein the first preset pressure difference value is larger than the second preset pressure difference value.
The beneficial effect of adopting the further scheme is that: and the DCS determines to adjust the opening of the fourth self-control valve to a fourth preset opening value according to the comparison result of the pressure difference value and the second preset pressure difference value, so that the pressure difference value of the hydrogen main pipe and the chlorine main pipe is adjusted, and the safety of the electrolytic cell is ensured.
Further, the DCS control system is further configured to adjust the second self-control valve to be opened to a fifth preset opening value when the pressure difference is greater than the third preset pressure difference;
and/or when the pressure difference is less than the fourth preset pressure difference, adjusting the second self-control valve to be opened to a sixth preset opening value, wherein the third preset pressure difference is greater than the fourth preset pressure difference, the fifth preset opening value is greater than the first preset opening value, and the first preset opening value is greater than the sixth preset opening value.
The beneficial effect of adopting the further scheme is that: and the DCS determines to adjust the opening value of the second automatic control valve according to the comparison result of the pressure difference value and the preset pressure difference value, so that the pressure difference value of the hydrogen main pipe and the chlorine main pipe is adjusted, and the safety of the electrolytic cell is ensured.
Further, the DCS control system is further configured to control the first automatic control valve to jump from the automatic mode to the manual operator control mode.
Another technical solution of the present invention for solving the above technical problems is as follows:
an electrolytic cell differential pressure control method comprising:
when the DCS control system acquires a tripping signal, controlling a first automatic control valve to be opened at a preset speed, controlling a second automatic control valve to be opened to a first preset opening value, controlling a third automatic control valve to be opened completely, and controlling a fourth automatic control valve to be opened to a second preset opening value;
and according to the pressure value of the hydrogen main pipe and the pressure value of the chlorine main pipe which are monitored in real time, obtaining a pressure difference value of the hydrogen main pipe and the chlorine main pipe, and controlling the opening degree of the second automatic control valve and the opening degree of the fourth automatic control valve according to the pressure difference value, the first preset pressure difference value, the second preset pressure difference value, the third preset pressure difference value and the fourth preset pressure difference value.
The invention has the beneficial effects that: the utility model provides an electrolysis trough pressure difference controlling means, when acquireing the tripping operation signal through DCS control system, the opening value of control first automatic control valve, second automatic control valve, third automatic control valve and fourth automatic control valve to reach the regulation to the pressure difference of chlorine and hydrogen, eliminated the electrolysis trough because of the risk that the hydrogen house steward and chlorine house steward pressure difference were too big brought, guaranteed the safety of electrolysis trough.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the method further comprises:
the DCS control system determines the pressure value of the chlorine gas main pipe according to the pressure value of the first pressure gauge, the pressure value of the second pressure gauge and the pressure value of the third pressure gauge by adopting a two-out-of-three logic;
and/or determining the pressure value of the hydrogen main pipe by adopting a two-out-of-three logic according to the pressure value of the fourth pressure gauge, the pressure value of the fifth pressure gauge and the pressure value of the sixth pressure gauge.
The beneficial effect of adopting the further scheme is that: through DCS control system according to three get two logics, confirm hydrogen house steward pressure value and chlorine house steward pressure value from the multiple manometer, can accurately acquire the pressure difference value of hydrogen house steward and chlorine house steward.
Further, the method further comprises:
when the DCS control system judges that the pressure difference value is larger than the first preset pressure difference value, adjusting the opening of a fourth self-control valve to a third preset opening value;
and/or when judging when the pressure difference is less than the second preset pressure difference, adjust the fourth automatic control valve opens to the fourth preset opening value, wherein first preset pressure difference is greater than the second preset pressure difference, the third preset opening value is greater than the second preset opening value, the second opening value is greater than the fourth preset opening value.
Further, the method further comprises:
when the DCS control system judges that the pressure difference value is larger than the third preset pressure difference value, adjusting the second automatic control valve to be opened to a fifth preset opening value;
and/or when the pressure difference is less than the fourth preset pressure difference, adjusting the second self-control valve to be opened to a sixth preset opening value, wherein the third preset pressure difference is greater than the fourth preset pressure difference, the fifth preset opening value is greater than the first preset opening value, and the first preset opening value is greater than the sixth preset opening value.
Further, the method further comprises:
before the controlling the first autonomous valve to open at a preset speed, the method further comprises:
the advantages of additional aspects of the invention for the DCS control system to control the first autonomous valve to jump from the automatic mode to the hand operator control mode will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an electrolytic cell pressure difference control device according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for controlling differential pressure in an electrolytic cell according to another embodiment of the present invention.
Detailed Description
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, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
As shown in FIG. 1, the schematic structural diagram of the electrolyzer pressure difference control device provided by the embodiment of the invention is as follows:
the utility model provides an electrolysis trough pressure difference controlling means includes chlorine house steward, hydrogen house steward, chlorine removes sodium hypo absorption house steward, hydrogen unloading house steward and electrolysis trough, and the electrolysis trough is connected respectively to chlorine house steward and hydrogen house steward, and chlorine removes sodium hypo absorption house steward and connects the chlorine house steward, and hydrogen unloading house steward connects hydrogen house steward, first automatic control valve, second automatic control valve, third automatic control valve, fourth automatic control valve and DCS control system.
The first automatic control valve is arranged on the chlorine gas main pipe, the second automatic control valve is arranged on the hydrogen gas main pipe, the third automatic control valve is arranged on the chlorine gas secondary sodium absorption main pipe, and the fourth automatic control valve is arranged on the hydrogen gas emptying main pipe;
the first automatic control valve, the second automatic control valve, the third automatic control valve and the fourth automatic control valve are respectively and electrically connected with the DCS control system;
when the DCS control system acquires a tripping signal, the first automatic control valve is controlled to be opened at a preset speed, the second automatic control valve is controlled to be opened to a first preset opening value, the third automatic control valve is controlled to be fully opened, and the fourth automatic control valve is controlled to be opened to a second preset opening value.
And according to the pressure value of the hydrogen main pipe and the pressure value of the chlorine main pipe which are monitored in real time, obtaining a pressure difference value of the hydrogen main pipe and the chlorine main pipe, and controlling the opening degree of the second automatic control valve and the opening degree of the fourth automatic control valve according to the pressure difference value, the first preset pressure difference value, the second preset pressure difference value, the third preset pressure difference value and the fourth preset pressure difference value.
It should be understood that the preset speed, the first preset opening value and the second preset opening value in the present embodiment are obtained by experience in production, for example, the preset speed may be 5% to 7% opening/second, the first preset opening value may be 60% to 80% of the opening value in normal operation, and may be determined according to different capacities of the electrolytic cell.
According to the electrolytic cell pressure difference control device provided by the embodiment, when the DCS control system acquires a tripping signal, the opening degree of the first automatic control valve, the second automatic control valve, the third automatic control valve and the fourth automatic control valve are controlled, so that the pressure difference of the chlorine main pipe and the hydrogen main pipe is adjusted, the risk of the electrolytic cell caused by the overlarge pressure difference of the hydrogen main pipe and the chlorine main pipe is eliminated, meanwhile, the pressure difference is kept stable, the ionic membrane cannot be damaged, and the safety of the electrolytic cell is also ensured.
Furthermore, the device also comprises a first pressure gauge, a second pressure gauge, a third pressure gauge, a fourth pressure gauge, a fifth pressure gauge and a sixth pressure gauge.
The first pressure gauge, the second pressure gauge and the third pressure gauge are respectively arranged on the chlorine gas main pipe, and the fourth pressure gauge, the fifth pressure gauge and the sixth pressure gauge are respectively arranged on the hydrogen gas main pipe;
the first pressure gauge, the second pressure gauge and the third pressure gauge, and the fourth pressure gauge, the fifth pressure gauge and the sixth pressure gauge are respectively connected with the DCS control system;
the DCS control system determines the pressure value of the chlorine gas main pipe according to the pressure value of the first pressure gauge, the pressure value of the second pressure gauge and the pressure value of the third pressure gauge by adopting a two-out-of-three logic;
and/or determining the pressure value of the hydrogen main pipe by adopting a two-out-of-three logic according to the pressure value of the fourth pressure gauge, the pressure value of the fifth pressure gauge and the pressure value of the sixth pressure gauge.
Further, the DCS control system is also used for adjusting the opening of the fourth self-control valve to a third preset opening value when the pressure difference value is larger than the first preset pressure difference value;
and/or when the pressure difference value is smaller than the second preset pressure difference value, adjusting the opening of the fourth self-control valve to a fourth preset opening value.
It is understood that the first predetermined pressure difference is greater than the second predetermined pressure difference, and in particular the value may be obtained empirically in actual production, the third predetermined opening value is greater than the second predetermined opening value, and the second opening value is greater than the fourth predetermined opening value.
Further, the DCS control system is also used for adjusting the opening of the second self-control valve to a fifth preset opening value when the pressure difference value is larger than a third preset pressure difference value;
and/or when the pressure difference value is smaller than a fourth preset pressure difference value, adjusting the opening of the second self-control valve to a sixth preset opening value.
It should be understood that the third predetermined pressure difference is greater than the fourth predetermined pressure difference, and in particular the value may be obtained from experience in actual production, the fifth predetermined opening value is greater than the first predetermined opening value, and the first predetermined opening value is greater than the sixth predetermined opening value.
And further, the DCS control system is also used for controlling the first automatic control valve to jump from the automatic mode to the manual operator control mode.
For example, when the electrolytic cell trips instantly, after receiving a tripping signal, the DCS control system sends an instruction to control the regulating valve of the chlorine main pipe to be switched from an automatic mode to a manual operator control mode, and then the regulating valve is slowly and fully opened at the speed of 5-7% of valve opening per second, so that the chlorine pressure reduction rate can be ensured to be stabilized at about 10kPa/S, and chlorine is slowly released. If the opening rate of the regulating valve of the chlorine gas main pipe is set to be less than 5%, the chlorine gas pressure is released at a speed of less than 10kPa/S, and the chlorine gas pressure drop rate is less than 5kPa/S, which easily causes the chlorine gas side membrane pressure to be overhigh instantly. When the opening rate of the regulating valve of the chlorine gas header pipe is set to be 10% of the opening rate in normal operation, the pressure of the chlorine gas can be released at a speed of more than 10MPa, so that the unilateral decompression of the ionic membrane is too fast. According to actual test data, the opening rate of the regulating valve of the chlorine gas main pipe is set to be 5-7% stable, and the pressure of the single-side membrane cannot be instantaneously too high. The opening of the regulating valve of the hydrogen main pipe is set to jump to 60-80% of the opening in the instant of tripping operation, the specific numerical value is determined according to electrolytic cells with different capacities, the hydrogen release speed is not too fast in the instant, the regulating valve of the hydrogen main pipe is always under DCS control, the valve opening is automatically regulated according to the pressure difference of hydrogen and chlorine, the small valve can be closed when the pressure difference of hydrogen and chlorine is large, the large valve is opened when the pressure difference of hydrogen and chlorine is small, and the pressure difference of hydrogen and chlorine is always kept stable at the set value. If the regulating valve of the hydrogen main pipe is set to be more than 80% of the normal opening degree in the instant tripping of the electrolytic cell, the instant pressure loss of the hydrogen can be caused, and the regulating valve of the hydrogen main pipe is always in a DCS automatic control state, so that the pressure of the system is unstable and finally the control is lost. If the opening of the regulating valve of the hydrogen main pipe is set within 60% of the opening value in normal operation, the hydrogen release speed is influenced when the electrolytic cell trips instantaneously, and the unilateral membrane is easily suppressed and the pressure is too high. The regulating valve on the chlorine sodium-removing absorption pipe is fully opened at the moment of tripping, the regulating valve on the hydrogen blow-down pipe is opened to 50% of the opening value in normal operation at the moment of tripping to control the release speed of hydrogen, and meanwhile, the DCS control system controls the opening of the regulating valves on the hydrogen blow-down pipe and the chlorine sodium-removing absorption pipe according to the pressure difference of the hydrogen and the chlorine. If the pressure difference between the hydrogen and the chlorine is higher than 6kPa instantly, the regulating valve on the hydrogen blow-down pipe jumps to 70% of the opening value in normal operation, and if the pressure difference between the hydrogen and the chlorine is lower than 2kPa instantly, the regulating valve on the hydrogen blow-down pipe jumps to 35% of the opening value in normal operation.
As shown in fig. 2, a flow chart of an electrolyzer pressure difference control method provided by another embodiment of the invention includes the following steps:
110. when the DCS control system acquires a tripping signal, the first automatic control valve is controlled to be opened at a preset speed, the second automatic control valve is controlled to be opened to a first preset opening value, the third automatic control valve is controlled to be fully opened, and the fourth automatic control valve is controlled to be opened to a second preset opening value.
120. And controlling the opening degree of the second automatic control valve and the opening degree of the fourth automatic control valve according to the pressure difference value, the first preset pressure difference value, the second preset pressure difference value, the third preset pressure difference value and the fourth preset pressure difference value.
According to the differential pressure control method for the electrolytic cell, when the DCS control system obtains the tripping signal, the opening values of the first automatic control valve, the second automatic control valve, the third automatic control valve and the fourth automatic control valve are controlled, so that the pressure difference value of chlorine and hydrogen is adjusted, the risk of the electrolytic cell caused by overlarge differential pressure between a hydrogen main pipe and a chlorine main pipe is eliminated, and the safety of the electrolytic cell is ensured.
Further, step 120 specifically includes:
the DCS control system determines the pressure value of the chlorine gas main pipe according to the pressure value of the first pressure gauge, the pressure value of the second pressure gauge and the pressure value of the third pressure gauge by adopting a two-out-of-three logic;
and/or determining the pressure value of the hydrogen main pipe by adopting a two-out-of-three logic according to the pressure value of the fourth pressure gauge, the pressure value of the fifth pressure gauge and the pressure value of the sixth pressure gauge.
Further, step 120 specifically includes:
when the DCS control system judges that the pressure difference value is larger than the first preset pressure difference value, adjusting the opening of a fourth self-control valve to a third preset opening value;
and/or when the pressure difference value is smaller than the second preset pressure difference value, adjusting the opening of the fourth self-control valve to a fourth preset opening value, wherein the first preset pressure difference value is larger than the second preset pressure difference value, the third preset opening value is larger than the second preset opening value, and the second opening value is larger than the fourth preset opening value.
Further, step 120 specifically includes:
when the DCS control system judges that the pressure difference value is larger than a third preset pressure difference value, adjusting the opening of the second self-control valve to a fifth preset opening value;
and/or when the pressure difference value is smaller than a fourth preset pressure difference value, adjusting the second self-control valve to be opened to a sixth preset opening value, wherein the third preset pressure difference value is larger than the fourth preset pressure difference value, the fifth preset opening value is larger than the first preset opening value, and the first preset opening value is larger than the sixth preset opening value.
Further, step 110 specifically includes:
before the first automatic control valve is controlled to be opened at the preset speed, the DCS control system controls the first automatic control valve to jump from the automatic mode to the manual operator control mode.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The electrolytic cell pressure difference control device comprises a chlorine gas main pipe, a hydrogen gas main pipe, a chlorine gas sodium hypochlorite removal absorption main pipe, a hydrogen gas emptying main pipe and an electrolytic cell, wherein the chlorine gas main pipe and the hydrogen gas main pipe are respectively connected with the electrolytic cell;
the first automatic control valve is installed on the chlorine gas main pipe, the second automatic control valve is installed on the hydrogen gas main pipe, the third automatic control valve is installed on the chlorine gas sodium hypochlorite absorption main pipe, and the fourth automatic control valve is installed on the hydrogen gas emptying main pipe;
the first automatic control valve, the second automatic control valve, the third automatic control valve and the fourth automatic control valve are respectively and electrically connected with the DCS control system;
the DCS control system is used for controlling the first automatic control valve to be opened at a preset speed when a tripping signal is obtained, the second automatic control valve is opened to a first preset opening value, the third automatic control valve is completely opened, and the fourth automatic control valve is opened to a second preset opening value;
and according to the pressure value of the hydrogen main pipe and the pressure value of the chlorine main pipe which are monitored in real time, obtaining a pressure difference value of the hydrogen main pipe and the chlorine main pipe, and controlling the opening degree of the second automatic control valve and the opening degree of the fourth automatic control valve according to the pressure difference value, a first preset pressure difference value, a second preset pressure difference value, a third preset pressure difference value and a fourth preset pressure difference value.
2. The electrolyzer pressure difference control device of claim 1 further comprising a first pressure gauge, a second pressure gauge, a third pressure gauge, a fourth pressure gauge, a fifth pressure gauge, a sixth pressure gauge;
the first pressure gauge, the second pressure gauge and the third pressure gauge are respectively arranged on the chlorine gas header pipe, and the fourth pressure gauge, the fifth pressure gauge and the sixth pressure gauge are respectively arranged on the hydrogen gas header pipe;
the first pressure gauge, the second pressure gauge and the third pressure gauge, and the fourth pressure gauge, the fifth pressure gauge and the sixth pressure gauge are respectively connected with the DCS control system;
the DCS control system is further used for determining a pressure value of the chlorine main pipe according to the pressure value of the first pressure gauge, the pressure value of the second pressure gauge and the pressure value of the third pressure gauge by adopting a two-out-of-three logic;
and/or determining the pressure value of the hydrogen main pipe by adopting a two-out-of-three logic according to the pressure value of the fourth pressure gauge, the pressure value of the fifth pressure gauge and the pressure value of the sixth pressure gauge.
3. The electrolyzer pressure difference control device of claim 1 characterized in that,
the DCS control system is further used for adjusting the opening of the fourth automatic control valve to a third preset opening value when the pressure difference value is larger than the first preset pressure difference value;
and/or when the pressure difference is less than the second preset pressure difference, the fourth automatic control valve is adjusted to be opened to a fourth preset opening value, wherein the first preset pressure difference is greater than the second preset pressure difference, the third preset opening value is greater than the second preset opening value, and the second opening value is greater than the fourth preset opening value.
4. The electrolyzer pressure difference control device of claim 1 characterized in that,
the DCS control system is further used for adjusting the opening of the second self-control valve to a fifth preset opening value when the pressure difference value is larger than the third preset pressure difference value;
and/or when the pressure difference is less than the fourth preset pressure difference, adjusting the second self-control valve to be opened to a sixth preset opening value, wherein the third preset pressure difference is greater than the fourth preset pressure difference, the fifth preset opening value is greater than the first preset opening value, and the first preset opening value is greater than the sixth preset opening value.
5. The electrolyzer pressure differential control device of any of claims 1 to 4 characterized in that the DCS control system is further used to control the first autonomous valve to jump from an automatic mode to a hand operator control mode.
6. An electrolytic cell differential pressure control method based on the electrolytic cell differential pressure control apparatus according to any one of claims 1 to 5, comprising:
when the DCS control system acquires a tripping signal, controlling a first automatic control valve to be opened at a preset speed, controlling a second automatic control valve to be opened to a first preset opening value, controlling a third automatic control valve to be opened completely, and controlling a fourth automatic control valve to be opened to a second preset opening value;
and according to the pressure value of the hydrogen main pipe and the pressure value of the chlorine main pipe which are monitored in real time, obtaining a pressure difference value of the hydrogen main pipe and the chlorine main pipe, and controlling the opening degree of the second automatic control valve and the opening degree of the fourth automatic control valve according to the pressure difference value, the first preset pressure difference value, the second preset pressure difference value, the third preset pressure difference value and the fourth preset pressure difference value.
7. The differential pressure control method in an electrolytic cell according to claim 6, further comprising:
the DCS control system determines the pressure value of the chlorine gas main pipe according to the pressure value of the first pressure gauge, the pressure value of the second pressure gauge and the pressure value of the third pressure gauge by adopting a two-out-of-three logic;
and/or determining the pressure value of the hydrogen main pipe by adopting a two-out-of-three logic according to the pressure value of the fourth pressure gauge, the pressure value of the fifth pressure gauge and the pressure value of the sixth pressure gauge.
8. The differential pressure control method in an electrolytic cell according to claim 6, further comprising:
when the DCS control system judges that the pressure difference value is larger than the first preset pressure difference value, adjusting the opening of a fourth self-control valve to a third preset opening value;
and/or when judging when the pressure difference is less than the second preset pressure difference, adjust the fourth automatic control valve opens to the fourth preset opening value, wherein first preset pressure difference is greater than the second preset pressure difference, the third preset opening value is greater than the second preset opening value, the second opening value is greater than the fourth preset opening value.
9. The differential pressure control method in an electrolytic cell according to claim 6, further comprising:
when the DCS control system judges that the pressure difference value is larger than the third preset pressure difference value, adjusting the second automatic control valve to be opened to a fifth preset opening value;
and/or when the pressure difference is less than the fourth preset pressure difference, adjusting the second self-control valve to be opened to a sixth preset opening value, wherein the third preset pressure difference is greater than the fourth preset pressure difference, the fifth preset opening value is greater than the first preset opening value, and the first preset opening value is greater than the sixth preset opening value.
10. The differential cell pressure control method according to any one of claims 6 to 9, wherein before the controlling the first automatic control valve to open at a preset speed, the method further comprises:
and the DCS control system controls the first automatic control valve to jump from an automatic mode to a manual operator control mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010320041.4A CN111519208A (en) | 2020-04-21 | 2020-04-21 | Electrolytic cell differential pressure control device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010320041.4A CN111519208A (en) | 2020-04-21 | 2020-04-21 | Electrolytic cell differential pressure control device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111519208A true CN111519208A (en) | 2020-08-11 |
Family
ID=71902779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010320041.4A Pending CN111519208A (en) | 2020-04-21 | 2020-04-21 | Electrolytic cell differential pressure control device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111519208A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63307289A (en) * | 1987-06-04 | 1988-12-14 | Yokogawa Electric Corp | Pressure control device for ion exchange membrane method electrolytic cell |
| CN203320134U (en) * | 2013-06-30 | 2013-12-04 | 金川集团股份有限公司 | Chlorine and hydrogen differential pressure adjusting device for ionic membrane electrolytic tank |
| CN208055471U (en) * | 2018-03-30 | 2018-11-06 | 唐山三友氯碱有限责任公司 | Caustic soda system enhances pressure difference stabilizing adjusting device |
| CN109518224A (en) * | 2018-10-30 | 2019-03-26 | 金川集团股份有限公司 | Emergency PLC control process for caustic soda system |
| CN109609972A (en) * | 2019-01-09 | 2019-04-12 | 青海盐湖工业股份有限公司 | A kind of system and method for realizing electrolytic cell list slot secure parking |
-
2020
- 2020-04-21 CN CN202010320041.4A patent/CN111519208A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63307289A (en) * | 1987-06-04 | 1988-12-14 | Yokogawa Electric Corp | Pressure control device for ion exchange membrane method electrolytic cell |
| CN203320134U (en) * | 2013-06-30 | 2013-12-04 | 金川集团股份有限公司 | Chlorine and hydrogen differential pressure adjusting device for ionic membrane electrolytic tank |
| CN208055471U (en) * | 2018-03-30 | 2018-11-06 | 唐山三友氯碱有限责任公司 | Caustic soda system enhances pressure difference stabilizing adjusting device |
| CN109518224A (en) * | 2018-10-30 | 2019-03-26 | 金川集团股份有限公司 | Emergency PLC control process for caustic soda system |
| CN109609972A (en) * | 2019-01-09 | 2019-04-12 | 青海盐湖工业股份有限公司 | A kind of system and method for realizing electrolytic cell list slot secure parking |
Non-Patent Citations (1)
| Title |
|---|
| 中国氯碱工业协会组织编写 程殿彬 等主编: "《离子膜法制碱生产技术》", 31 January 1998, 化学工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114134527B (en) | Water electrolysis hydrogen production device and method with multiple electrolytic tanks | |
| CN103677023B (en) | The method and system that slurry bed system hydrogen peroxide plant oxidizing tower safety interlocking controls | |
| CN111455401B (en) | Nitrogen charging system of ion membrane electrolytic cell | |
| CN111519208A (en) | Electrolytic cell differential pressure control device and method | |
| CN113699039A (en) | Two-way oxygen supply device, bioreactor and method | |
| CN114959795B (en) | Hydrogen production system and control method thereof | |
| CN114790551A (en) | Liquid level balance control system and method for water electrolysis hydrogen production equipment | |
| CN205528152U (en) | Water purifier | |
| CN105561771B (en) | Oxide powder and zinc desulphurization control device and method based on online monitoring data interlocking | |
| CN211068890U (en) | Fire water monitoring system | |
| CN209412330U (en) | A kind of hydrogen safe draining device | |
| CN115537841B (en) | Hydrogen production control system, method and storage medium | |
| CN116516415A (en) | Wide-range stable dynamic performance test system and operation method of alkaline electrolytic tank | |
| KR920003241B1 (en) | Sodium hydro sulfite electrolytic cell process control system | |
| CN101303038B (en) | Intelligent air discharge system for hydraulic system pump front low-pressure end | |
| CN111538357A (en) | Single-cell overpressure protection device and method for electrolytic cell | |
| CN216052712U (en) | Safety control system of hydrogen reduction steel belt furnace | |
| CN212293603U (en) | Double-channel oxygen supply device and bioreactor | |
| CN113782789B (en) | Anode pressure protection method of fuel cell system | |
| CN104062986B (en) | Hydrogen generation station liquid level ratio control system and method | |
| CN209415037U (en) | Nitrogen supply system | |
| CN105425842A (en) | Mechanical seal leakage rate online monitoring system | |
| CN217977544U (en) | Automatic water replenishing device for deaerator water seal | |
| CN217997359U (en) | Automatic pressure maintaining and replacing device for hydrogen system after emergency stop | |
| US20150028122A1 (en) | Supervised nitrogen cylinder inerting system for fire protection sprinkler system and method of inerting a fire protection sprinkler system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200811 |