CN111561440A - High efficiency air compressor machine unit control system - Google Patents
High efficiency air compressor machine unit control system Download PDFInfo
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- CN111561440A CN111561440A CN202010230593.6A CN202010230593A CN111561440A CN 111561440 A CN111561440 A CN 111561440A CN 202010230593 A CN202010230593 A CN 202010230593A CN 111561440 A CN111561440 A CN 111561440A
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- Prior art keywords
- cooling water
- air compressor
- water
- central controller
- frequency converter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a high-efficiency air compressor unit control system, which comprises a cooling water pool, a control cabinet, a monitoring computer, a cooling water pump set, a heat exchanger and an air compressor unit, wherein the cooling water pool is connected with the control cabinet; the control cabinet comprises a central controller and a frequency converter group which are connected with each other, the central controller is connected with a monitoring computer, a liquid flowmeter, a temperature sensor, a pressure transmitter, a water tank liquid level meter, a water replenishing valve, an emergency water valve, a gas pressure transmitter, a gas flowmeter, an electric valve group and an air compressor group respectively, the frequency converter group is connected with a cooling water pump group, and the water tank liquid level meter is arranged in a cooling water tank. The invention improves the energy utilization efficiency, realizes economic operation and saves the electricity charge; the air compressor can be remotely started and closed, the standby air compressor can be automatically started when the running machine fails, the cooling water pool can be automatically controlled to supplement water, and the emergency water pipeline is automatically switched to in an emergency, so that the running stability and safety of the system are greatly improved; the workload of manually starting and stopping the equipment is greatly reduced.
Description
Technical Field
The invention belongs to the field of glass substrate production, and particularly relates to a high-efficiency air compressor unit control system.
Background
A large-scale air compressor is required to produce purified compressed air in the production process of the liquid crystal glass substrate. When the compressed air required by production is more or the requirement on the compressed air is strict, a plurality of air compressor units are required to be configured. Many units can switch in turn, ensure that can not influence compressed air's normal supply when certain air compressor machine trouble or overhaul the maintenance. The heat generated by the air compressor in the operation process is sent to the cooling tower by the cooling water and is dissipated into the air.
Most of the existing air compressors are manually started and stopped, when the air compressors break down suddenly, the air compressors need to manually arrive at field operation valves and start standby units, time delay exists, short stop supply of compressed air is caused, and continuous production is affected. And the heat that the air compressor machine operation in-process produced gives off in the air, and the energy utilization efficiency is low, and the energy waste is great.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a high-efficiency air compressor unit control system.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a high-efficiency air compressor unit control system comprises a cooling water pool, a control cabinet, a monitoring computer, a cooling water pump set, a heat exchanger and an air compressor unit;
the control cabinet comprises a central controller and a frequency converter group which are connected with each other, the central controller is respectively connected with a monitoring computer, a liquid flowmeter, a temperature sensor, a pressure transmitter, a water tank liquid level meter, a water supplementing valve, an emergency water valve, a gas pressure transmitter, a gas flowmeter, an electric valve group and an air compressor group, the frequency converter group is connected with a cooling water pump group, and the water tank liquid level meter is arranged in a cooling water tank;
the input end of the cooling water pump set is communicated with the cooling water pool, the output end of the cooling water pump set is communicated with the water inlet of the air compressor set, the water outlet of the air compressor set is connected with the input end of the liquid flow meter through a cooling water pipeline, the output end of the liquid flow meter is connected with the first inlet of the heat exchanger, a temperature sensor and a pressure transmitter are connected beside the cooling water pipeline, the first outlet of the heat exchanger is communicated with the input end of the cooling tower, and the output end of the cooling tower is arranged above;
the air inlet of the air compressor unit is connected with a filter through an air pipeline, the air outlet of the air compressor unit is connected with a gas flowmeter through an electric valve group, and a gas pressure transmitter is connected between the electric valve group and the gas flowmeter;
the input end of the water replenishing valve and the input end of the emergency water valve are both connected with a water supply source, the output end of the water replenishing valve is communicated with a cooling water pool, and the output end of the emergency water valve is communicated with a water inlet of the air compressor unit.
Furthermore, the cooling water pump group consists of a plurality of cooling water pumps which are connected in parallel, the frequency converter group comprises frequency converters with the number corresponding to that of the cooling water pumps, and the air compressor group consists of a plurality of air compressors which are connected in parallel;
when the air compressor unit operates, the central controller controls the operation of the first cooling water pump through the first frequency converter, the liquid flow meter is used for sending a detected return water flow value to the central controller, the temperature sensor is used for sending a detected return water temperature value to the central controller, and the pressure transmitter is used for sending a detected return water pressure value to the central controller:
when the backwater temperature value is larger than the upper limit of the preset temperature range, the central controller controls and increases the frequency of the first frequency converter so as to improve the water supply quantity of the first cooling water pump; when the first frequency converter reaches the upper limit of the rated frequency and the first cooling water pump runs at full speed, if the return water temperature value is still larger than the upper limit of the preset temperature range at the moment, the central controller controls the second cooling water pump to run through the second frequency converter, the central controller controls the frequency of the second frequency converter to be increased from small to large, when the first frequency converter and the second frequency converter both reach the upper limit of the rated frequency and the first cooling water pump and the second cooling water pump both run at full speed, if the return water temperature value is still larger than the upper limit of the preset temperature range at the moment, and similarly, the central controller controls the third cooling water pump to run through the third frequency converter until the return water temperature value is within the preset temperature range.
Further, when the running number of the air compressors is reduced and the return water temperature value is smaller than the lower limit of the preset temperature range, the number of the cooling water pumps and the number of the frequency converters are both N, the central controller controls to reduce the frequency of the Nth frequency converter, so that the water supply amount of the Nth cooling water pump is reduced, if the frequency of the Nth frequency converter is reduced to the lower limit of the rated frequency, the return water temperature is still at the lower limit of the preset temperature range, the central controller controls to close the Nth frequency converter and stop the operation of the Nth cooling water pump until the return water temperature value is within the preset temperature range.
Furthermore, the monitoring computer is used for monitoring the return water temperature and the real-time frequency of the frequency converter group in real time, and meanwhile, is used for setting the water supplement preset value range of the cooling water pool, when the water pool liquid level meter in the cooling water pool detects that the water pool liquid level is lower than the water supplement preset value lower limit, the central controller controls to open the water supplement valve to supplement water to the cooling water pool, and when the water pool liquid level meter in the cooling water pool detects that the water pool liquid level is higher than the water supplement preset value upper limit, the central controller controls to close the water supplement valve to stop supplementing water.
Further, when the cooling water pump set breaks down and water supply is interrupted, the central controller detects that the return water flow value is smaller than a preset value, and then the emergency water valve is controlled to be opened.
The invention has the beneficial effects that:
the control system provided by the invention can flexibly set the upper limit and the lower limit of the backwater temperature and the liquid level of the cooling water pool on the touch screen and the monitoring computer according to the actual situation; the operation condition and the output frequency of the frequency converter can be automatically adjusted in real time according to the operation condition of the air compressor, so that the water supply amount of cooling water is adjusted, and meanwhile, heat generated in the operation process of the air compressor is converted to bath water through the heat exchanger, so that the energy utilization efficiency is improved, economic operation is realized, and the electric charge is saved; the air compressor can be remotely started and closed, the standby air compressor can be automatically started when the running machine fails, the cooling water pool can be automatically controlled to supplement water, and the emergency water pipeline is automatically switched to in an emergency, so that the running stability and safety of the system are greatly improved; the system parameter setting and monitoring can be remotely and conveniently carried out, the system adjustment reaction time is short, and the follow-up property is good; the workload of manually starting and stopping the equipment is greatly reduced, and the manpower resource is saved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of the construction of the apparatus of the present invention;
fig. 2 is a schematic diagram of the control system structure 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the control system of the high-efficiency air compressor unit comprises a cooling water tank 1, a control cabinet 2, a monitoring computer 3, a cooling water pump set 4, a heat exchanger 20 and an air compressor unit 21;
the control cabinet 2 internally comprises a central controller 12 and a frequency converter group 11 which are connected with each other, the central controller 12 is respectively connected with a monitoring computer 3, a liquid flowmeter 5, a temperature sensor 6, a pressure transmitter 7, a pool liquid level meter 8, a water supplementing valve 9, an emergency water valve 10, a gas pressure transmitter 16, a gas flowmeter 17, an electric valve group 18 and an air compressor group 21, the frequency converter group 11 is connected with a cooling water pump group 4, and the pool liquid level meter 8 is arranged in the cooling water pool 1;
the input end of a cooling water pump set 4 is communicated with a cooling water pool 1, the output end of the cooling water pump set 4 is communicated with the water inlet of an air compressor set 21, the water outlet of the air compressor set 21 is connected with the input end of a liquid flow meter 5 through a cooling water pipeline 14, the output end of the liquid flow meter 5 is connected with a first inlet of a heat exchanger 20, a temperature sensor 6 and a pressure transmitter 7 are connected to the side of the cooling water pipeline 14, a first outlet of the heat exchanger 20 is communicated with the input end of a cooling tower 15, and the output end of the cooling tower 15;
an air inlet of the air compressor unit 21 is connected with a filter 19 through an air pipeline 13, an air outlet of the air compressor unit 21 is connected with a gas flowmeter 17 through an electric valve bank 18, and a gas pressure transmitter 16 is connected between the electric valve bank 18 and the gas flowmeter 17;
the input end of the water supply valve 9 and the input end of the emergency water valve 10 are both connected with a water supply source, the output end of the water supply valve 9 is communicated with the cooling water pool 1, and the output end of the emergency water valve 10 is communicated with the water inlet of the air compressor unit 21.
The cooling water pump set 4 consists of a plurality of cooling water pumps which are connected in parallel, the frequency converter set 11 comprises frequency converters with the number corresponding to that of the cooling water pumps, and the air compressor set 21 consists of a plurality of air compressors which are connected in parallel;
when the air compressor unit 21 operates, the central controller 12 controls the operation of the first cooling water pump through the first frequency converter, the liquid flowmeter 5 is used for sending the detected return water flow value to the central controller 12, the temperature sensor 6 is used for sending the detected return water temperature value to the central controller 12, and the pressure transmitter 7 is used for sending the detected return water pressure value to the central controller 12:
when the backwater temperature value is larger than the upper limit of the preset temperature range, the central controller 12 controls the frequency of the first frequency converter to be increased so as to increase the water supply amount of the first cooling water pump; when the first frequency converter reaches the upper limit of the rated frequency and the first cooling water pump runs at full speed, if the return water temperature value is still larger than the upper limit of the preset temperature range at the moment, the central controller 12 controls the second cooling water pump to run through the second frequency converter, the central controller 12 controls the frequency of the second frequency converter to be increased from small to large, when the first frequency converter and the second frequency converter both reach the upper limit of the rated frequency and the first cooling water pump and the second cooling water pump both run at full speed, if the return water temperature value is still larger than the upper limit of the preset temperature range at the moment, similarly, the central controller 12 controls the third cooling water pump to run through the third frequency converter until the return water temperature value is within the preset temperature range.
When the number of the air compressors is reduced and the return water temperature value is smaller than the lower limit of the preset temperature range, the number of the cooling water pumps and the number of the frequency converters are both N, the central controller 12 controls to reduce the frequency of the Nth frequency converter, so that the water supply amount of the Nth cooling water pump is reduced, if the frequency of the Nth frequency converter is reduced to the lower limit of the rated frequency, the return water temperature still has the lower limit of the preset temperature range, the central controller 12 controls to close the Nth frequency converter and stop the operation of the Nth cooling water pump until the return water temperature value is in the preset temperature range.
The monitoring computer 3 is used for monitoring the return water temperature and the real-time frequency of the frequency converter set 11 in real time and simultaneously setting the water supplementing preset value range of the cooling water pool 1, when the water pool liquid level meter 8 in the cooling water pool 1 detects that the water pool liquid level is lower than the water supplementing preset value lower limit, the central controller 12 controls to open the water supplementing valve 9 to supplement water to the cooling water pool 1, and when the water pool liquid level meter 8 in the cooling water pool 1 detects that the water pool liquid level is higher than the water supplementing preset value upper limit, the central controller 12 controls to close the water supplementing valve 9 to stop supplementing water.
When the cooling water pump set 4 breaks down and water supply is interrupted, and the central controller 12 detects that the return water flow value is smaller than the preset value, the emergency water valve 10 is controlled to be opened, the air compressor is cooled by using emergency water, and stable operation of the air compressor is ensured.
Meanwhile, the monitoring computer 3 is provided with the starting priority of the frequency converter group 11, when a certain frequency converter or water pump has a fault and needs to be overhauled, the equipment can be temporarily stopped, and the operation of other equipment cannot be influenced.
Can long-rangely open the air compressor machine on control computer 3, before opening the air compressor machine, at first open the motorised valve that the air compressor machine corresponds, when control computer issues the order of opening No. 1 air compressor machine promptly, central controller 12 can open No. 1 motorised valve earlier, opens the air compressor machine export, just then can the signal, opens No. 1 air compressor machine. When the automatic control mode is set, the central controller 12 detects the gas outlet pressure, the outlet gas flow signal and the air compressor running signal, when the running air compressor is suddenly stopped due to a fault, the central controller 12 immediately and automatically starts the standby air compressor to ensure the supply of compressed air, the priority starting sequence of the air compressor can be set on the monitoring computer 3, and the central controller 12 can automatically select the air compressor according to the state of the air compressor.
The heat in the operation process of the air compressor is taken away by the cooling water and is sent to the heat exchanger 20, and the cold water for bathing is supplied after being heated for bathing, so that the energy utilization efficiency is improved, and the energy loss of the system is reduced. Meanwhile, the heat exchanger is used for isolating water quality and exchanging heat, so that the water quality of the water for bathing can reach the living use standard, and the water quality is prevented from being polluted by cooling water of the air compressor.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (5)
1. The utility model provides a high efficiency air compressor machine unit control system which characterized in that: comprises a cooling water pool (1), a control cabinet (2), a monitoring computer (3), a cooling water pump set (4), a heat exchanger (20) and an air compressor set (21);
the control cabinet (2) internally comprises a central controller (12) and a frequency converter group (11) which are connected with each other, the central controller (12) is respectively connected with a monitoring computer (3), a liquid flowmeter (5), a temperature sensor (6), a pressure transmitter (7), a pool liquid level meter (8), a water supplementing valve (9), an emergency water valve (10), a gas pressure transmitter (16), a gas flowmeter (17), an electric valve group (18) and an air compressor group (21), the frequency converter group (11) is connected with a cooling water pump group (4), and the pool liquid level meter (8) is arranged in the cooling water pool (1);
the input end of the cooling water pump set (4) is communicated with the cooling water pool (1), the output end of the cooling water pump set (4) is communicated with the water inlet of the air compressor set (21), the water outlet of the air compressor set (21) is connected with the input end of the liquid flowmeter (5) through the cooling water pipeline (14), the output end of the liquid flowmeter (5) is connected with the first inlet of the heat exchanger (20), the temperature sensor (6) and the pressure transmitter (7) are connected to the cooling water pipeline (14) in a side-by-side mode, the first outlet of the heat exchanger (20) is communicated with the input end of the cooling tower (15), and the output end of the cooling tower (15) is arranged above;
the air inlet of the air compressor unit (21) is connected with a filter (19) through an air pipeline (13), the air outlet of the air compressor unit (21) is connected with a gas flowmeter (17) through an electric valve group (18), and a gas pressure transmitter (16) is connected between the electric valve group (18) and the gas flowmeter (17);
the input end of the water replenishing valve (9) and the input end of the emergency water valve (10) are both connected with a water supply source, the output end of the water replenishing valve (9) is communicated with the cooling water pool (1), and the output end of the emergency water valve (10) is communicated with a water inlet of the air compressor unit (21).
2. The high-efficiency air compressor unit control system according to claim 1, wherein: the cooling water pump set (4) consists of a plurality of cooling water pumps which are connected in parallel, the frequency converter set (11) comprises frequency converters with the number corresponding to that of the cooling water pumps, and the air compressor set (21) consists of a plurality of air compressors which are connected in parallel;
when the air compressor unit (21) operates, the central controller (12) controls the operation of the first cooling water pump through the first frequency converter, the liquid flowmeter (5) is used for sending a detected backwater flow value to the central controller (12), the temperature sensor (6) is used for sending a detected backwater temperature value to the central controller (12), and the pressure transmitter (7) is used for sending a detected backwater pressure value to the central controller (12):
when the backwater temperature value is larger than the upper limit of the preset temperature range, the central controller (12) controls the increase of the frequency of the first frequency converter for increasing the water supply quantity of the first cooling water pump; when the first frequency converter reaches the upper limit of the rated frequency and the first cooling water pump runs at full speed, if the return water temperature value is still larger than the upper limit of the preset temperature range at the moment, the central controller (12) controls the second cooling water pump to run through the second frequency converter, the central controller (12) controls the frequency of the second frequency converter to be increased from small to large, when the first frequency converter and the second frequency converter both reach the upper limit of the rated frequency and the first cooling water pump and the second cooling water pump both run at full speed, if the return water temperature value is still larger than the upper limit of the preset temperature range at the moment, and in the same way, the central controller (12) controls the third cooling water pump to run through the third frequency converter until the return water temperature value is within the preset temperature range.
3. The high-efficiency air compressor unit control system according to claim 2, wherein: when the running number of the air compressors is reduced and the backwater temperature value is smaller than the lower limit of the preset temperature range, the number of the cooling water pumps and the number of the frequency converters are both N, the central controller (12) controls to reduce the frequency of the Nth frequency converter, so that the water supply amount of the Nth cooling water pump is reduced, if the frequency of the Nth frequency converter is reduced to the lower limit of the rated frequency, the backwater temperature is still at the lower limit of the preset temperature range, the central controller (12) controls to close the Nth frequency converter and stop the operation of the Nth cooling water pump until the backwater temperature value is within the preset temperature range.
4. The high-efficiency air compressor unit control system according to claim 1, wherein: the monitoring computer (3) is used for monitoring the real-time frequency of the return water temperature and the frequency converter group (11) in real time, and is used for setting the water supplementing preset value range of the cooling water pool (1), when the water pool liquid level meter (8) in the cooling water pool (1) detects that the water pool liquid level is lower than the water supplementing preset value lower limit, the water supplementing valve (9) is opened under the control of the central controller (12), water is supplemented to the cooling water pool (1), when the water pool liquid level meter (8) in the cooling water pool (1) detects that the water pool liquid level is higher than the water supplementing preset value upper limit, the water supplementing valve (9) is closed under the control of the central controller (12), and.
5. The high-efficiency air compressor unit control system according to claim 1, wherein: when the cooling water pump set (4) breaks down and water supply is interrupted, and the central controller (12) detects that the return water flow value is smaller than a preset value, the emergency water valve (10) is controlled to be opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010230593.6A CN111561440A (en) | 2020-03-27 | 2020-03-27 | High efficiency air compressor machine unit control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010230593.6A CN111561440A (en) | 2020-03-27 | 2020-03-27 | High efficiency air compressor machine unit control system |
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| CN111561440A true CN111561440A (en) | 2020-08-21 |
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| CN202010230593.6A Pending CN111561440A (en) | 2020-03-27 | 2020-03-27 | High efficiency air compressor machine unit control system |
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| CN112963336A (en) * | 2021-03-26 | 2021-06-15 | 利欧集团浙江泵业有限公司 | Control method of water pump |
| CN114790979A (en) * | 2022-04-29 | 2022-07-26 | 国能河北沧东发电有限责任公司 | Air compressor control system and method based on DCS control cabinet |
| CN115013342A (en) * | 2022-05-26 | 2022-09-06 | 中航光电科技股份有限公司 | Redundancy-designed fan rotating speed control system and method |
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| CN115013342A (en) * | 2022-05-26 | 2022-09-06 | 中航光电科技股份有限公司 | Redundancy-designed fan rotating speed control system and method |
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Application publication date: 20200821 |
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| RJ01 | Rejection of invention patent application after publication |