CN216751145U - Anti-electricity-dazzling device in phthalic anhydride production - Google Patents
Anti-electricity-dazzling device in phthalic anhydride production Download PDFInfo
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- CN216751145U CN216751145U CN202220196019.8U CN202220196019U CN216751145U CN 216751145 U CN216751145 U CN 216751145U CN 202220196019 U CN202220196019 U CN 202220196019U CN 216751145 U CN216751145 U CN 216751145U
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Abstract
The utility model discloses an anti-interference electricity device in phthalic anhydride production, which comprises a PLC (programmable logic controller) automatic control system and a UPS (uninterrupted power supply) system, wherein the UPS system is respectively and electrically connected to a first power supply and a second power supply through a switching controller, and the UPS system is also electrically connected with a first contactor and a second contactor which are arranged in parallel; the PLC automatic control system is respectively and electrically connected to the first voltage controller, the first voltage transmitter, the second voltage controller and the second voltage transmitter; the PLC automatic control system is also electrically connected to a first contactor and a second contactor which are arranged in parallel, and the first contactor and the second contactor are electrically connected to a first circulating pump and a second circulating pump which are arranged in parallel after being connected in parallel. The utility model overcomes the defects of the prior art, has good anti-interference effect and ensures continuous and stable production.
Description
Technical Field
The utility model belongs to the technical field of anti-interference electricity, and particularly relates to an anti-interference electricity device in phthalic anhydride production.
Background
The power interference refers to one of the power quality events that the voltage effective value is reduced to 10% to 90% of the nominal value, called voltage sag/dip, and the duration is 10ms to 1min (the typical duration is 10ms to 600 ms). If the voltage sag is severe, the electrical equipment will be used to stop operating, or cause the production system to be disturbed and paralyzed, or cause the production system to stop unexpectedly.
The causes of voltage sag can be broadly divided into three categories, the first being power system causes: when the power transmission and distribution system has short-circuit faults, induction motor starting, switching operation, switching of a frequency converter and a capacitor bank and other events; the second category is natural: lightning strikes, rainstorms, snowstorms, and the like; the third category is an unforeseeable contingency: human misoperation, damage to the power transmission system caused by building construction and the like. Among the main causes of voltage sag are short circuit faults, induction motor start-up and lightning strikes. The protection device can be operated due to insulator flashover or earth discharge caused by lightning strike, so that the power supply voltage is temporarily reduced. The sag wave has wide range and the duration is more than 100 ms; when the motor is started at full voltage, the current value required to be drawn from the power supply is 500% -800% of that of the full load, and when the large current flows through system impedance, the voltage is suddenly reduced; the short-circuit fault may cause the severe drop of the power supply voltage at the far end of the system, and the normal work of the electrical equipment sensitive to the voltage in the production process of the continuous production enterprise is affected by the short-circuit fault, so that the breakdown and the shutdown of the production system are caused, and the serious economic loss is caused.
At present, when phthalic anhydride (phthalic anhydride) production enterprises carry out phthalic anhydride production, as the production System is generally provided with an SIS (Safety Instrumented System), once the production System is influenced by electricity interference, a variable-frequency molten salt pump stops and triggers an SIS linkage, so that the production System is paralyzed, and the device is stopped. Each stop causes direct loss of several tens of thousands of yuan, so the problem needs to be solved urgently.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: the utility model provides an electricity dazzling prevention device in phthalic anhydride production, overcome prior art's defect, the electricity dazzling prevention effect is good, ensures the continuous and stable operation of production.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
an anti-interference electricity device in phthalic anhydride production comprises a PLC automatic control system and a UPS system, wherein the UPS system is respectively and electrically connected to a first power supply and a second power supply through a switching controller, and the UPS system is also electrically connected with a first contactor and a second contactor which are arranged in parallel; the PLC automatic control system is respectively and electrically connected to the first voltage controller, the first voltage transmitter, the second voltage controller and the second voltage transmitter; the first contactor and the second contactor are connected in parallel and then electrically connected to the first circulating pump and the second circulating pump which are arranged in parallel.
Preferably, the PLC automatic control system is also electrically connected to a first frequency converter and a second frequency converter which are arranged in parallel; the first frequency converter is a high-pressure boiler feed pump frequency converter A, and the second frequency converter is a high-pressure boiler feed pump frequency converter B, and is used for controlling the starting of the high-pressure boiler feed pump and preventing the high-pressure boiler feed pump from stopping due to electricity interference.
Preferably, the PLC automatic control system is Siemens S7-200 type PLC automatic control system, and the manufacturer is Siemens Bingson company.
Preferably, the PLC automatic control system is also electrically connected with an alarm, and the type of the alarm is a LAY5s-FM intermittent flashing type AC 220V red intermittent flashing light band sound type buzzer manufactured by Deleisi electric Co. And alarming when the voltage is too low and a power-shaking phenomenon occurs.
Preferably, the UPS system is an Eaton DX 3000 UPS system, and the manufacturer is Eaton electric (hang state) ltd.
Preferably, the first power supply and the second power supply are respectively an alternating current power supply. The first power supply and the second power supply are respectively led to different transformer low voltages, so that production stop caused by the fact that alternating current of one line is cut off is prevented.
Preferably, the switching controller is a dual power switching controller with the model of TMP 300-2. Shanghai, Hefu, Co-exhibition of electromechanical technologies, Inc.
Preferably, the first voltage controller is of a type WBV344U01-S, the first voltage transmitter is of a type WBV414H25, the second voltage controller is of a type WBV344U01-S, and the second voltage transmitter is of a type WBV414H 25. The first voltage controller, the first voltage transmitter, the second voltage controller and the second voltage transmitter respectively detect the power supply conditions of the first power supply and the second power supply, transmit signals to the PLC automatic control system when electricity interference occurs, and start emergency reaction.
Preferably, the UPS system is also provided with a standby power supply, the standby power supply is a battery automatic control cabinet and consists of 80 12V65AH battery packs. The manufacturer is Guangdong decoction shallow (YUASA) storage battery Co.
Preferably, the first circulating pump is a molten salt pump G-14A, and the second circulating pump is a molten salt pump G-14B. All are circulating pumps used for producing phthalic anhydride.
Due to the adoption of the technical scheme, the utility model has the beneficial effects that:
the utility model uses the direct current uninterrupted power source as a compensation power source, ensures that the frequency converter can still continuously operate when the voltage interference and the undervoltage are generated, and the motor operates above the specified minimum rotating speed so as to ensure that the equipment continuously operates and the SIS system is not triggered, thereby ensuring that the device does not jump and the production continuously and stably operates.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment of the present invention;
wherein, 1, PLC automatic control system; 2. a UPS system; 3. a switching controller; 4. a first contactor; 5. a second contactor; 6. a first voltage controller; 7. a first voltage transmitter; 8. a second voltage controller; 9. a second voltage transmitter; 10. a first circulation pump; 11. a second circulation pump; 12. a first frequency converter; 13. a second frequency converter; 14. an alarm.
Detailed Description
The utility model is further illustrated below with reference to the figures and examples.
Example one
As shown in fig. 1, the present invention is an anti-interference electricity device in the production of phthalic anhydride, which comprises a PLC automatic control system 1 and a UPS system 2, wherein the UPS system 2 is electrically connected to a first power supply (not shown) and a second power supply (not shown) through a switching controller 3, and the UPS system 2 is further electrically connected to a first contactor 4 and a second contactor 5 which are arranged in parallel; the PLC automatic control system 1 is respectively and electrically connected to a first voltage controller 6, a first voltage transmitter 7, a second voltage controller 8 and a second voltage transmitter 9; the PLC automatic control system 1 is also electrically connected to a first contactor 4 and a second contactor 5 which are arranged in parallel; the first contactor 4 and the second contactor 5 are electrically connected in parallel to a first circulation pump 10 and a second circulation pump 11 which are arranged in parallel.
The PLC automatic control system 1 is also electrically connected with a first frequency converter 12 and a second frequency converter 13 which are arranged in parallel; and an alarm 14. The UPS system 2 is further provided with a backup power supply, which is a battery automatic control cabinet (not shown).
In actual application:
because the PLC automatic control system 1 can detect the electricity interference phenomenon of a power supply I or a power supply II (the power supply I and the power supply II are respectively from different transformers) through the first voltage controller 6, the first voltage transmitter 7, the second voltage controller 8 and the second voltage transmitter 9, when the PLC automatic control system 1 detects the voltage drop of the power supply I or the power supply II through the corresponding voltage controller and the corresponding voltage transmitter, the first contactor 4 and the second contactor 5 in the UPS system 2 (provided with a standby battery automatic control cabinet without external power supply) can be controlled to be attracted, and a battery pack UPS directly supplies power to two first circulating pumps 10 (molten salt pumps G-14A) and two second circulating pumps 11 (molten salt pumps G-14B), so that the two circulating pumps are ensured not to be stopped; the PLC automatic control system 1 also monitors the running condition of the high-pressure boiler feed water pump in the production line, and when the electricity interference phenomenon occurs, the PLC automatic control system 1 can restart the high-pressure boiler feed water pump by controlling the first frequency converter 12 and the second frequency converter 13 according to the running condition before the electricity interference, so that the continuous running of the high-pressure boiler feed water pump is ensured.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (9)
1. An electric dazzling prevention device in phthalic anhydride production is characterized in that: the UPS system is electrically connected to a first power supply and a second power supply respectively through a switching controller, and is also electrically connected with a first contactor and a second contactor which are arranged in parallel; the PLC automatic control system is respectively and electrically connected to the first voltage controller, the first voltage transmitter, the second voltage controller and the second voltage transmitter; the PLC automatic control system is also electrically connected to a first contactor and a second contactor which are arranged in parallel, and the first contactor and the second contactor are electrically connected to a first circulating pump and a second circulating pump which are arranged in parallel after being connected in parallel.
2. The electricity dazzling prevention device in the production of phthalic anhydride according to claim 1, wherein: the PLC automatic control system is also electrically connected to a first frequency converter and a second frequency converter which are arranged in parallel.
3. The electricity dazzling prevention device in the production of phthalic anhydride according to claim 1, wherein: the PLC automatic control system is a Siemens S7-200 type PLC automatic control system.
4. The electricity dazzling prevention device in the production of phthalic anhydride according to claim 1, wherein: and the PLC automatic control system is also electrically connected with an alarm.
5. The electricity dazzling prevention device in the production of phthalic anhydride according to claim 1, wherein: the UPS system is an Eaton DX 3000 model UPS system.
6. The electricity dazzling prevention device in the production of phthalic anhydride according to claim 1, wherein: the switching controller is a dual-power switching controller, and the model of the switching controller is TMP 300-2.
7. The electricity dazzling prevention device in the production of phthalic anhydride according to claim 1, wherein: the first voltage controller is of a model WBV344U01-S, the first voltage transmitter is of a model WBV414H25, the second voltage controller is of a model WBV344U01-S, and the second voltage transmitter is of a model WBV414H 25.
8. The electricity dazzling prevention device in the production of phthalic anhydride according to claim 1, wherein: the UPS system is also provided with a standby power supply which is a battery automatic control cabinet.
9. The electricity dazzling prevention device in the production of phthalic anhydride according to claim 1, wherein: the first circulating pump is a molten salt pump G-14A, and the second circulating pump is a molten salt pump G-14B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220196019.8U CN216751145U (en) | 2022-01-25 | 2022-01-25 | Anti-electricity-dazzling device in phthalic anhydride production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220196019.8U CN216751145U (en) | 2022-01-25 | 2022-01-25 | Anti-electricity-dazzling device in phthalic anhydride production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216751145U true CN216751145U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220196019.8U Active CN216751145U (en) | 2022-01-25 | 2022-01-25 | Anti-electricity-dazzling device in phthalic anhydride production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216751145U (en) |
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2022
- 2022-01-25 CN CN202220196019.8U patent/CN216751145U/en active Active
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