CN112629144A - Control method of industrial circulating cooling water system - Google Patents
Control method of industrial circulating cooling water system Download PDFInfo
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- CN112629144A CN112629144A CN202011449608.4A CN202011449608A CN112629144A CN 112629144 A CN112629144 A CN 112629144A CN 202011449608 A CN202011449608 A CN 202011449608A CN 112629144 A CN112629144 A CN 112629144A
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- water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/001—Arrangement or mounting of control or safety devices for cryogenic fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/008—Alarm devices
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a control method of an industrial circulating cooling water system. The control method of the industrial circulating cooling water system comprises the following steps: s1: constant voltage control: controlling the rotating speed of a circulating pump through a frequency converter according to the PID dynamic regulation of the water outlet pressure; s2: and (3) constant temperature control: and (4) carrying out return difference control or high-start low-stop S3 according to the outlet water temperature: liquid level control: according to the low start and high stop of the liquid level of the water tank, the water is automatically supplemented by controlling a water supplementing electromagnetic valve; s4: and (3) alarm control: and alarming through a sensor. The control method of the industrial circulating cooling water system provided by the invention has the advantages of realizing constant-pressure and constant-temperature water supply, facilitating the system maintenance and ensuring the normal operation of the system.
Description
Technical Field
The invention relates to the technical field of circulating cooling water, in particular to a control method of an industrial circulating cooling water system.
Background
An industrial circulating cooling water system is a common system in an industrial production process, and the traditional industrial circulating cooling water system has poor control effect and is relatively complex in control of water temperature, water pressure and water level.
Therefore, there is a need to provide a new control method for an industrial circulating cooling water system to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a control method of an industrial circulating cooling water system, which can realize constant-pressure and constant-temperature water supply and can facilitate system maintenance and ensure normal operation of the system.
In order to solve the technical problem, the control method of the industrial circulating cooling water system provided by the invention comprises the following steps:
s1: constant voltage control: controlling the rotating speed of a circulating pump through a frequency converter according to the PID dynamic regulation of the water outlet pressure;
s2: and (3) constant temperature control: according to the temperature of the outlet water, return difference control or high start and low stop are carried out
S3: liquid level control: according to the low start and high stop of the liquid level of the water tank, the water is automatically supplemented by controlling a water supplementing electromagnetic valve;
s4: and (3) alarm control: and alarming through a sensor.
Preferably, the circulating pump is a double water pump.
Preferably, the water tank is two water tank settings, two water tank are water supply tank and return water tank, water supply tank and return water tank open according to the moisturizing and stop the liquid level and stop the corresponding solenoid valve of liquid level setting control respectively.
Preferably, the alarm control comprises operation type alarm and fault type alarm, the operation type alarm comprises water pump start operation failure alarm, water outlet pressure decompression alarm, water outlet pressure overpressure alarm, water outlet pressure bias alarm, water outlet temperature deviation alarm, water outlet temperature ultrahigh alarm, water outlet temperature ultralow alarm, water tank liquid level low alarm, water tank liquid level high alarm and water tank water replenishing failure alarm, and the fault type alarm comprises frequency conversion fault alarm, water pump overcurrent fault alarm and cooling tower overcurrent fault alarm.
Compared with the related art, the control method of the industrial circulating cooling water system provided by the invention has the following beneficial effects:
the invention provides a control method of an industrial circulating cooling water system, which can realize automatic control of the industrial circulating cooling water system, can detect the operation of the industrial circulating cooling water system by arranging various sensors in the industrial circulating cooling water system, and can alarm in time when an error occurs in the industrial circulating cooling water system, thereby ensuring the normal operation of the industrial circulating cooling water system and facilitating the maintenance work of the industrial circulating cooling water system.
Drawings
FIG. 1 is a block diagram illustrating a recirculating cooling water system in a method for controlling an industrial recirculating cooling water system according to the present invention;
FIG. 2 is a flow chart of constant pressure control of a circulating pump unit in the control method of the industrial circulating cooling water system according to the present invention;
FIG. 3 is a flow chart of automatic water replenishment control in the control method of the industrial circulating cooling water system provided by the present invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1, fig. 2 and fig. 3 in combination, wherein fig. 1 is a block diagram of a circulating cooling water system in the method for controlling an industrial circulating cooling water system according to the present invention; FIG. 2 is a flow chart of constant pressure control of a circulating pump unit in the control method of the industrial circulating cooling water system according to the present invention; FIG. 3 is a flow chart of automatic water replenishment control in the control method of the industrial circulating cooling water system provided by the present invention. The control method of the industrial circulating cooling water system comprises the following steps:
s1: constant voltage control: controlling the rotating speed of a circulating pump through a frequency converter according to the PID dynamic regulation of the water outlet pressure;
s2: and (3) constant temperature control: according to the temperature of the outlet water, return difference control or high start and low stop are carried out
S3: liquid level control: according to the low start and high stop of the liquid level of the water tank, the water is automatically supplemented by controlling a water supplementing electromagnetic valve;
s4: and (3) alarm control: and alarming through a sensor.
The circulating pump is a double-water pump.
The water tank is two water tank settings, two water tank are water supply tank and return water tank, water supply tank and return water tank open according to the moisturizing and stop the liquid level and stop the corresponding solenoid valve of liquid level setting control respectively.
The alarm control comprises operation alarm and fault alarm, the operation alarm comprises water pump start operation failure alarm, water outlet pressure decompression alarm, water outlet pressure overpressure alarm, water outlet pressure bias alarm, water outlet temperature deviation alarm, water outlet temperature ultrahigh alarm, water outlet temperature ultralow alarm, water tank liquid level low alarm, water tank liquid level high alarm and water tank water replenishing failure alarm, and the fault alarm comprises frequency conversion fault alarm, water pump overcurrent fault alarm and cooling tower overcurrent fault alarm.
The water pressure at the water outlet end of the water pump is used as a set parameter, and the rotating speed of a water pump motor is adjusted through the output frequency of the PLC automatic control frequency converter, so that the closed-loop adjustment of the water pressure of a user pipe network is realized, and the automatic constant pressure of a water supply system is stabilized at a set pressure value: when the water amount is increased, the frequency is increased, and the rotating speed of the water pump is accelerated; when the water consumption is reduced, the frequency is reduced, and the rotating speed of the water pump is reduced. Thus, the whole user pipe network is ensured to have sufficient water pressure and water quantity at any time.
The pressure sensor arranged on the water outlet pipeline transmits a pressure signal of water supply pressure to the PLC, the signal is compared with a set pressure signal after being processed inside the PLC, the purpose of stabilizing the water supply pressure is achieved by automatically changing the rotating speed of the motor and adjusting the flow of the water pumps through the frequency converter (automatically controlling the increase and decrease of the number of the water pumps during multi-pump control), and the water supply device adopts frequency conversion constant pressure water supply and has the advantages of high efficiency, energy conservation, reliable operation, simple operation and the like.
Compared with the related art, the control method of the industrial circulating cooling water system provided by the invention has the following beneficial effects:
the invention provides a control method of an industrial circulating cooling water system, which can realize automatic control of the industrial circulating cooling water system, can detect the operation of the industrial circulating cooling water system by arranging various sensors in the industrial circulating cooling water system, and can give an alarm in time when the industrial circulating cooling water system has errors, thereby ensuring the normal operation of the industrial circulating cooling water system and facilitating the maintenance work of the industrial circulating cooling water system
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A control method of an industrial circulating cooling water system is characterized by comprising the following steps:
s1: constant voltage control: controlling the rotating speed of a circulating pump through a frequency converter according to the PID dynamic regulation of the water outlet pressure;
s2: and (3) constant temperature control: according to the temperature of the outlet water, return difference control or high start and low stop are carried out
S3: liquid level control: according to the low start and high stop of the liquid level of the water tank, the water is automatically supplemented by controlling a water supplementing electromagnetic valve;
s4: and (3) alarm control: and alarming through a sensor.
2. The method for controlling an industrial circulating cooling water system according to claim 1, wherein the circulating pump is a double water pump arrangement.
3. The method for controlling an industrial circulating cooling water system according to claim 1, wherein the water tanks are a double water tank, the double water tanks are a water supply tank and a water return tank, and the water supply tank and the water return tank respectively control corresponding electromagnetic valves according to the water replenishing start-stop liquid level and stop liquid level settings.
4. The method for controlling an industrial circulating cooling water system according to claim 1, wherein the alarm control includes an operation alarm and a fault alarm, the operation alarm includes a water pump start operation failure alarm, a water outlet pressure decompression alarm, a water outlet pressure overpressure alarm, a water outlet pressure bias alarm, a water outlet temperature deviation alarm, a water outlet temperature ultrahigh alarm, a water outlet temperature ultralow alarm, a water tank liquid level low alarm, a water tank liquid level high alarm and a water tank water replenishing failure alarm, and the fault alarm includes a frequency conversion fault alarm, a water pump overcurrent fault alarm and a cooling tower overcurrent fault alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011449608.4A CN112629144A (en) | 2020-12-09 | 2020-12-09 | Control method of industrial circulating cooling water system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011449608.4A CN112629144A (en) | 2020-12-09 | 2020-12-09 | Control method of industrial circulating cooling water system |
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| CN112629144A true CN112629144A (en) | 2021-04-09 |
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| CN202011449608.4A Pending CN112629144A (en) | 2020-12-09 | 2020-12-09 | Control method of industrial circulating cooling water system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375384A (en) * | 2021-07-17 | 2021-09-10 | 南京拓展科技有限公司 | Ultrahigh-precision process cooling water system and constant temperature control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02115755A (en) * | 1988-10-26 | 1990-04-27 | Toshiba Corp | Abnormality detector for cooling water circulating system of rotating electric machinery |
| CA2332653A1 (en) * | 2000-10-31 | 2002-04-30 | Jason Incorporated | Buffing tools and methods of making |
| CN205784683U (en) * | 2016-06-30 | 2016-12-07 | 上海大众祥源动力供应有限公司 | A kind of energy-efficient cooling tower operation control system |
| CN208635573U (en) * | 2018-01-25 | 2019-03-22 | 株洲创林合金有限责任公司 | A kind of alloy melting intermediate frequency furnace cooling circulating water system device |
| CN211451528U (en) * | 2019-12-12 | 2020-09-08 | 大地熊（苏州）磁铁有限公司 | Automatic water supply constant-pressure water cooling system |
| CN211698752U (en) * | 2020-05-22 | 2020-10-16 | 浙江晨浩智能科技有限公司 | Energy-efficient switch board is used to intelligence constant temperature and pressure circulating water control system |
-
2020
- 2020-12-09 CN CN202011449608.4A patent/CN112629144A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02115755A (en) * | 1988-10-26 | 1990-04-27 | Toshiba Corp | Abnormality detector for cooling water circulating system of rotating electric machinery |
| CA2332653A1 (en) * | 2000-10-31 | 2002-04-30 | Jason Incorporated | Buffing tools and methods of making |
| CN205784683U (en) * | 2016-06-30 | 2016-12-07 | 上海大众祥源动力供应有限公司 | A kind of energy-efficient cooling tower operation control system |
| CN208635573U (en) * | 2018-01-25 | 2019-03-22 | 株洲创林合金有限责任公司 | A kind of alloy melting intermediate frequency furnace cooling circulating water system device |
| CN211451528U (en) * | 2019-12-12 | 2020-09-08 | 大地熊（苏州）磁铁有限公司 | Automatic water supply constant-pressure water cooling system |
| CN211698752U (en) * | 2020-05-22 | 2020-10-16 | 浙江晨浩智能科技有限公司 | Energy-efficient switch board is used to intelligence constant temperature and pressure circulating water control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113375384A (en) * | 2021-07-17 | 2021-09-10 | 南京拓展科技有限公司 | Ultrahigh-precision process cooling water system and constant temperature control method thereof |
| CN113375384B (en) * | 2021-07-17 | 2022-08-30 | 南京拓展科技有限公司 | Ultrahigh-precision process cooling water system and constant temperature control method thereof |
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