CN210178625U - Anti-surge control system of vapor compressor - Google Patents
Anti-surge control system of vapor compressor Download PDFInfo
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- CN210178625U CN210178625U CN201920868022.8U CN201920868022U CN210178625U CN 210178625 U CN210178625 U CN 210178625U CN 201920868022 U CN201920868022 U CN 201920868022U CN 210178625 U CN210178625 U CN 210178625U
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- 238000001704 evaporation Methods 0.000 claims abstract description 62
- 230000008020 evaporation Effects 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 18
- 230000006378 damage Effects 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 239000012153 distilled water Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
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Abstract
The utility model relates to a compressor surge-proof technical field, concretely relates to vapor compressor's surge-proof control system, including the flowmeter, evaporation plant, the compressor, the vapor water collection device, bright vapor transport device and material conveyor, evaporation plant is equipped with an entrance point, No. two entrance points, No. three entrance points, an exit end and No. two exit ends, material conveyor and an entrance point intercommunication, an exit end and vapor water collection device intercommunication of evaporation plant, No. two exit ends and the compressor intercommunication of evaporation plant, compressor and No. three entrance point intercommunication, bright vapor transport device and No. two entrance point intercommunications, the flowmeter sets up in vapor water collection device's exit end. The utility model discloses a control system can be accurate detect out the gas volume of crossing of compressor as the parameter of judging the compressor surge, is favorable to this system to take place to intervene in advance before the surge at the compressor, avoids the compressor to receive the damage, has guaranteed the continuous steady operation of system.
Description
Technical Field
The utility model relates to a compressor surge prevention technical field, concretely relates to vapor compressor's surge prevention control system.
Background
Surge is vibration of a turbine compressor (also called a vane compressor) under an abnormal condition that occurs when a flow rate (an air passing amount) is reduced to a certain degree, and is a large hazard to the compressor. The compressor is one of turbine compressors, is mainly applied to MVR evaporation, namely a mechanical vapor recompression system, the compression medium of the compressor is secondary vapor evaporated by the system, the pressure and the temperature are increased after compression, and then the secondary vapor is driven into the shell pass of the evaporator to continuously heat materials for reuse, a small amount of electric energy is consumed in the process, and a continuous evaporation process is formed in a circulating manner so as to achieve the purpose of energy conservation. According to the application characteristics of the compressor, when the evaporation capacity of the system is reduced due to various reasons, the generated secondary steam is reduced, and the flow of the compressor is reduced; when the compressor flow drops to a certain degree, the compressor then can take place the surge, and the compressor takes place the surge and leads to the vibration value increase again, and compressor current fluctuation is big, and the compressor operation is unstable, so can influence the operating efficiency and the performance of compressor, can cause heating steam to reduce and the heat supply is not enough, further leads to the decline of evaporation capacity, forms vicious circle, finally can cause whole system shutdown because of the continuous deterioration of compressor surge, and is great to compressor and system's injury.
At present, a method for solving the surge of the compressor is mainly characterized in that a vortex flowmeter is arranged on an inlet pipeline of the compressor to monitor the flow of the compressor, the error of the gas passing amount of the compressor measured by the vortex flowmeter is large, evaporation is a dynamic process, the flow of secondary steam is greatly influenced by pressure and temperature, particularly, the flow fluctuates greatly when the compressor surges, and the measured flow cannot be used as the basis for judging the surge of the compressor in practical application. The essential of the surge of the compressor is the reduction of the excess air volume, the reduction of the excess air volume is complex and various, and single measures and methods cannot be used for preventing in advance and only can be used as some remedial measures after the compressor generates the surge.
Disclosure of Invention
In order to overcome the shortcoming and the deficiency that exist among the prior art, the utility model aims at providing a vapor compressor's anti-surge control system, this system can intervene in advance before the compressor takes place the surge, avoids the compressor to receive the damage, has guaranteed the continuous steady operation of system.
The purpose of the utility model is realized through the following technical scheme: the utility model provides a vapor compressor's anti-surge control system, includes flowmeter, evaporation plant, compressor, steam water collection device, bright steam conveying device and material conveyor, evaporation plant is equipped with an entrance point, No. two entrance points, No. three entrance points, an exit end and No. two exit ends, material conveyor with evaporation plant's an entrance point intercommunication, evaporation plant's an exit end with steam water collection device entrance point intercommunication, evaporation plant's No. two exit ends with the entrance point intercommunication of compressor, the exit end of compressor with evaporation plant's No. three entrance point intercommunication, bright steam conveying device with evaporation plant's No. two entrance point intercommunications, the flowmeter set up in steam water collection device's exit end.
Further, this system still includes PLC controller, ampere meter, temperature sensor, converter and a plurality of wire, the PLC controller is equipped with input, No. two inputs, No. three inputs, No. four inputs, an output and No. two outputs, temperature sensor set up in evaporation plant go up and through the wire with No. two inputs switch-on of PLC controller, the converter set up in on the compressor and through the wire with No. three inputs switch-on of PLC controller, the ampere meter set up in on the converter and through the wire with No. four inputs switch-on of PLC controller, the flowmeter through the wire with No. one input switch-on of PLC controller.
Furthermore, a branch conveying port is arranged at the outlet end of the compressor, and the branch conveying port is communicated with the inlet end of the compressor to form a circulation loop.
Furthermore, the system also comprises a first control valve and a second control valve, wherein the first control valve is arranged at a branch delivery port of the compressor and communicated with the inlet end of the compressor, and the second control valve is arranged at the second inlet end of the evaporation device and communicated with the fresh steam delivery device.
Further, the temperature of the vapor in the compressor rises to 90-100 ℃ after the vapor is compressed. Furthermore, the material is preheated to 80-90 ℃ in the evaporation device by the fresh steam conveyed by the fresh steam conveying device.
The beneficial effects of the utility model reside in that: the utility model relates to a vapor compressor's anti-surge control system, the flowmeter of setting can the detecting system in the secondary steam that the evaporation plant evaporation came out through the compressor compression heat the flow of the whole condensate water of in-process of material again, flow through detecting the distilled water and flow (quality) according to the secondary steam equals the flow of distilled water, the detection that can be accurate goes out the air capacity of compressor, this parameter can provide the reference for the surge of judging the compressor, be favorable to this system to take place to intervene in advance before the surge at the compressor, avoid the compressor to receive the damage, the continuous steady operation of system has been guaranteed.
Drawings
Fig. 1 is a schematic diagram of the control system of the present invention.
The reference signs are: the system comprises a 1-flow meter, a 2-evaporation device, a 21-first inlet end, a 22-second inlet end, a 23-third inlet end, a 24-first outlet end, a 25-second outlet end, a 3-compressor, a 31-branch conveying port, a 4-steam water collecting device, a 5-fresh steam conveying device, a 6-material conveying device, a 7-PLC controller, a 71-first input end, a 72-second input end, a 73-third input end, a 74-fourth input end, a 75-first output end, a 76-second output end, an 8-ammeter, a 9-temperature sensor, a 10-frequency converter, a 11-first control valve and a 12-second control valve.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and the accompanying fig. 1, which are not intended to limit the present invention.
Referring to fig. 1, the surge prevention control system of a vapor compressor comprises a flow meter 1, an evaporation device 2, a compressor 3, a vapor water collecting device 4, a fresh vapor conveying device 5 and a material conveying device 6, the evaporation device 2 is provided with a first inlet end 21, a second inlet end 22, a third inlet end 23, a first outlet end 24 and a second outlet end 25, the material conveying device 6 is communicated with the first inlet end 21 of the evaporation device 2, the first outlet end 24 of the evaporation device 2 is communicated with the inlet end of the steam water collecting device 4, the second outlet end 25 of the evaporation device 2 is communicated with the inlet end of the compressor 3, the outlet end of the compressor 3 is communicated with the third inlet end 23 of the evaporation device 2, the fresh steam conveying device 5 is communicated with a second inlet end 22 of the evaporation device 2, and the flowmeter 1 is arranged at the outlet end of the steam water collecting device 4. The flow meter 1 is used for measuring the liquid flow rate flowing out of the outlet end of the steam water collecting device 4.
Anti-surge control system still includes PLC controller 7, ampere meter 8, temperature sensor 9, converter 10 and a plurality of wire, PLC controller 7 is equipped with input 71, No. two input 72, No. three input 73, No. four input 74, an output 75 and No. two output 76, temperature sensor 9 set up in evaporation plant 2 and through the wire with No. two input 72 switch-ons of PLC controller 7, converter 10 set up in compressor 3 and through the wire with No. three input 73 switch-ons of PLC controller 7, ampere meter 8 set up in on the converter 10 and through the wire with No. four input 74 switch-ons of PLC controller 7, flowmeter 1 through the wire with input 71 switch-on of PLC controller 7. The outlet end of the compressor 3 is provided with a branch conveying port 31, and the branch conveying port 31 is communicated with the inlet end of the compressor 3 to form a circulation loop. The system further comprises a first control valve 11 and a second control valve 12, wherein the first control valve 11 is arranged at the branch delivery port 31 of the compressor 3 and is communicated with the inlet end of the compressor 3, and the second control valve 12 is arranged at the second inlet end 22 of the evaporation device 2 and is communicated with the fresh steam delivery device 5. When the anti-surge control system of the embodiment is used, the temperature of the compressed steam in the compressor 3 is increased to 90-100 ℃; furthermore, the material in the evaporation device 2 is firstly preheated to 80-90 ℃ by the fresh steam conveyed by the fresh steam conveying device 5.
In the implementation, a solution to be processed is sent into an evaporation device 2 through a material conveying device 6, the material in the evaporation device 2 is preheated to the evaporation temperature of 80-90 ℃ through fresh steam conveyed by a fresh steam conveying device 5, then a compressor 3 is started, the temperature of secondary steam generated by starting evaporation in the evaporation device 2 is increased to 90-100 ℃ after the secondary steam is compressed by the compressor 3, then the secondary steam is conveyed to a shell pass of the evaporation device 2 to be continuously heated, so that the material is circularly heated and utilized, the steam conveyed to the shell pass of the evaporation device 2 to be continuously heated is condensed into water and flows into a steam water collecting device 4, then a discharge system detects the flow rate of the condensed water through a flow meter 1 arranged at the outlet end of the steam water collecting device 4 (the evaporated secondary steam is completely condensed into water in the process of reheating the material after being compressed by the compressor 3), and utilizes the mass conservation law (the flow rate or the mass of the secondary steam is, the excess air quantity of the compressor 3 can be accurately detected by detecting the flow quantity of the distilled water, and the excess air quantity is used as a data parameter to judge the surging of the compressor 3. The frequency converter 10 arranged on the compressor 3 can adjust the load according to the running condition of the compressor 3, and the ammeter 8 arranged additionally can detect the running current of the compressor 3.
When the flowmeter 1 detects that the evaporation capacity of the system is continuously reduced to 70% lower than the rated evaporation capacity, the control system starts to intervene, an output end 75 of the PLC 7 outputs a signal to be transmitted to the second control valve 12, the second control valve 12 is automatically opened to input fresh steam to improve the temperature of materials in the evaporation device 2, the evaporation intensity is further improved, the evaporation capacity of the evaporation device 2 is increased, and the steam flows into the compressor 3 through the second outlet end 25 of the evaporation device 2 to improve the air passing capacity of the compressor 3. When the evaporation capacity in the evaporation device 2 is increased back to 90% of the rated evaporation capacity, the output end 75 of the PLC 7 outputs a signal to the second control valve 12 to automatically close the second control valve 12, so that the system is automatically balanced and enters a virtuous circle, and the surge of the compressor 3 is prevented.
When the adjustment cannot improve the evaporation capacity of the system, the air flow of the evaporation device 2 is continuously reduced, for example, is lower than 65% of the rated flow, lasts for 5min, and has no tendency to rise back, the output end 76 of the PLC controller 7 outputs a signal to the first control valve 11, the opening of the first control valve 11 is automatically adjusted to 10% (when the system is in normal operation, the valve is normally closed, the opening is 0%), and part of the air flow at the outlet end of the compressor 3 is returned to the inlet end of the compressor 3 through the first control valve 11, so as to make up for the insufficient evaporation capacity delivered by the evaporation device 2, and at this time, the water flow of the steam cooling water cannot be used as a basis for judging the surge of the compressor 3. The current of the compressor 3 with new parameters is input through the set ammeter 8, and the current value of the operation of the compressor 3 is collected in real time through the ammeter 8. When the nominal air-passing capacity of the compressor 3 (the running current of the compressor 3 in normal operation and the steam flow are in a linear proportional relationship, the running current of the compressor 3 and the flow are in another linear proportional relationship (zero point migration occurs) when the first control valve 11 is opened, the relationship is found out through the debugging and running of the actual engineering, and then the relationship is automatically compared with the flow value of the distilled water outlet water through a program, so that the nominal air-passing capacity of the compressor 3 after being pushed is obtained) and approaches to the surge area of the compressor 3, the opening degree of the first control valve 11 is continuously opened to be 20 percent, and the like. Until the nominal air-passing amount of the compressor 3 is more than 80% of the rated flow, after the current is stabilized, the second output end 76 of the PLC 7 outputs a signal to close the opening of the first control valve 11 by 10% on the original basis, and so on until the first control valve 11 is completely closed (the opening is 0%), and simultaneously, the distilled water outlet flow value is monitored in real time, the PLC 7 is used for automatic calculation by combining the temperature sensor 9 and the frequency converter 10, one or more measures are taken, and finally, the flow of the compressor 3 returns to the safety interval again, so that the continuous and stable operation of the system is ensured, and the surge of the compressor 3 is avoided.
The above-mentioned embodiment is the utility model discloses the implementation of preferred, in addition, the utility model discloses can also realize by other modes, not deviating from the utility model discloses any obvious replacement is all within the protection scope under the prerequisite of design.
Claims (4)
1. An anti-surge control system of a vapor compressor, characterized in that: including flowmeter, evaporation plant, compressor, steam water collection device, bright steam conveying device and material conveying device, evaporation plant is equipped with an entrance point, No. two entrance points, No. three entrance points, an exit end and No. two exit ends, material conveying device with evaporation plant's an entrance point intercommunication, evaporation plant's an exit end with steam water collection device entrance point intercommunication, evaporation plant's No. two exit ends with the entrance point intercommunication of compressor, the exit end of compressor with evaporation plant's No. three entrance point intercommunication, bright steam conveying device with evaporation plant's No. two entrance point intercommunications, the flowmeter set up in steam water collection device's exit end.
2. The anti-surge control system for a vapor compressor of claim 1, wherein: this system still includes PLC controller, ampere meter, temperature sensor, converter and a plurality of wire, the PLC controller is equipped with input, No. two inputs, No. three inputs, No. four inputs, an output and No. two outputs, temperature sensor set up in evaporation plant and through the wire with No. two inputs switch-ons of PLC controller, the converter set up in on the compressor and through the wire with No. three inputs switch-ons of PLC controller, the ampere meter set up in on the converter and through the wire with No. four inputs switch-ons of PLC controller, the flowmeter pass through the wire with an input switch-on of PLC controller.
3. The anti-surge control system for a vapor compressor of claim 1, wherein: the outlet end of the compressor is provided with a branch conveying port, and the branch conveying port is communicated with the inlet end of the compressor to form a circulation loop.
4. The anti-surge control system of a vapor compressor according to claim 3, wherein: the system further comprises a first control valve and a second control valve, wherein the first control valve is arranged at a branch delivery port of the compressor and communicated with the inlet end of the compressor, and the second control valve is arranged at the second inlet end of the evaporation device and communicated with the fresh steam delivery device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920868022.8U CN210178625U (en) | 2019-06-10 | 2019-06-10 | Anti-surge control system of vapor compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920868022.8U CN210178625U (en) | 2019-06-10 | 2019-06-10 | Anti-surge control system of vapor compressor |
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| CN210178625U true CN210178625U (en) | 2020-03-24 |
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| CN201920868022.8U Active CN210178625U (en) | 2019-06-10 | 2019-06-10 | Anti-surge control system of vapor compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115910410A (en) * | 2023-01-04 | 2023-04-04 | 中国原子能科学研究院 | Method for treating radioactive waste liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115910410A (en) * | 2023-01-04 | 2023-04-04 | 中国原子能科学研究院 | Method for treating radioactive waste liquid |
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Address after: No. 221 Jiangyang Road, Jingjiang City, Taizhou City, Jiangsu Province, 214500 Patentee after: Jiangsu Chuanda Energy Technology Co.,Ltd. Address before: No. 221 Jiangyang Road, Jingjiang City, Taizhou City, Jiangsu Province, 214599 Patentee before: Jingjiang Chuanda Energy Technology Co.,Ltd. |