CN204493196U - A kind of two-stage helical-lobe compressor exhaust pressure stabilizer - Google Patents
A kind of two-stage helical-lobe compressor exhaust pressure stabilizer Download PDFInfo
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- CN204493196U CN204493196U CN201520094702.0U CN201520094702U CN204493196U CN 204493196 U CN204493196 U CN 204493196U CN 201520094702 U CN201520094702 U CN 201520094702U CN 204493196 U CN204493196 U CN 204493196U
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Abstract
A kind of two-stage helical-lobe compressor exhaust pressure stabilizer, comprise front buffer tank, this front buffer tank is connected with one-level helical-lobe compressor; The rear portion of this one-level helical-lobe compressor is connected with first-level buffer tank; This first-level buffer tank is connected with secondary helical-lobe compressor, and the rear portion of this secondary helical-lobe compressor is connected with level 2 buffering tank; It is characterized in that: described first-level buffer tank is connected with front buffer tank by one-level exhaust gas recirculation pipeline; One-level exhaust gas recirculation pipeline is provided with one-level return valve; First-level buffer tank is also provided with one-level exhaust pressure relief pipeline, and this one-level exhaust pressure relief pipeline connects front buffer tank; Level 2 buffering tank is connected with front buffer tank by secondary exhaust return line; Secondary exhaust return line is provided with secondary return valve; Level 2 buffering tank is also provided with secondary exhaust pressure relief pipe, and this secondary exhaust pressure relief pipe connects front buffer tank; The utility model has the advantages that PLC passes through to regulate in order exhaust gas reflux valve and exhaust pressure relief valve, ensure that the stability of exhaust pressure, substantially increase the automaticity of system.
Description
Technical field
The utility model relates to a kind of two-stage helical-lobe compressor automatic control technology field; Be specifically related to a kind of stabilizer of two-stage helical-lobe compressor exhaust pressure.
Background technique
Existing large-scale combustible gas power station requires higher to quality of filling gas, especially has strict requirement to the stability of supply gas pressure and the degree of purity of gas; If the over proof number range of supply gas pressure, then power generation system can be caused to report to the police, the scope exceeded is comparatively large, and power generation system even can be caused to shut down.
The pressurization system of combustible gas power station adopts two-stage helical-lobe compressor usually, inevitably there is the phenomenon of pressure surge in the virgin gas entering helical-lobe compressor, when the pressure surge of virgin gas, the exhaust pressure of one-level helical-lobe compressor also fluctuates thereupon, and meanwhile the exhaust pressure of secondary helical-lobe compressor also can fluctuate.
If when raw gas pressure wave range is less, the exhaust pressure actual value that PLC sends according to pressure transmitter and setting value compare, thus adjustment electric machine frequency just effectively can ensure stablizing of supply gas pressure; But when raw gas pressure wave range is larger, exhaust pressure also certainly leads to larger fluctuation, now often need the operation frequency adjusting motor artificially, to guarantee the stable of exhaust pressure.Usually can there is retardation phenomenon in this manual tune mode, thus cause the warning of power generation system even to be shut down.Therefore, manual tune method affects equipment reliability of operation, and reduces power station manufacturing efficiency.
Model utility content
Technical problem to be solved in the utility model is the situation for prior art, provides a kind of and can improve the stability of a system and the two-stage helical-lobe compressor automatically controlled stablizes the devices and methods therefor of exhaust pressure.
The utility model solves the problems of the technologies described above adopted technological scheme: a kind of two-stage helical-lobe compressor stablizes the device of exhaust pressure, comprises front buffer tank, and this front buffer tank is connected with the suction port of one-level helical-lobe compressor by one-level air inlet pipeline; The air outlet of this one-level helical-lobe compressor is connected with first-level buffer tank by one-level gas exhaust piping; The top of this first-level buffer tank is connected by the suction port of secondary inlet pipeline with secondary helical-lobe compressor, and the air outlet of this secondary helical-lobe compressor is connected with level 2 buffering tank by secondary exhaust pipeline; Described one-level gas exhaust piping is provided with one-level exhaust pressure transmitter, described secondary exhaust pipeline is provided with secondary exhaust pressure transmitter, described one-level exhaust pressure transmitter is connected with PLC with secondary exhaust pressure transmitter; It is characterized in that:
Described first-level buffer tank top is connected with described front buffer tank by one-level exhaust gas recirculation pipeline; Described one-level exhaust gas recirculation pipeline is provided with one-level return valve; This one-level return valve is connected with described PLC; Described first-level buffer tank top is also provided with one-level exhaust pressure relief pipeline, and this one-level exhaust pressure relief pipeline connects described front buffer tank; Described one-level exhaust pressure relief pipeline installs one-level exhaust pressure relief valve, and this one-level exhaust pressure relief valve is connected with described PLC;
Described level 2 buffering tank top is connected with described front buffer tank by secondary exhaust return line; Described secondary exhaust return line is provided with secondary return valve; This secondary return valve is connected with described PLC; Described level 2 buffering tank top is also provided with secondary exhaust pressure relief pipe, and this secondary exhaust pressure relief pipe connects described front buffer tank; Described secondary exhaust pressure relief pipe installs secondary exhaust Decompression valves, and this secondary exhaust Decompression valves is connected with described PLC.
Described one-level helical-lobe compressor is driven by one-level variable-frequency motor, and this one-level variable-frequency motor is connected with described PLC; Described secondary helical-lobe compressor is driven by secondary variable-frequency motor, and this secondary variable-frequency motor is connected with described PLC.
One stage of compression of the present utility model is provided with the one-level exhaust gas recirculation pipeline and one-level exhaust pressure relief pipeline that connect first-level buffer tank and front buffer tank, one-level exhaust gas recirculation pipeline is provided with one-level exhaust gas recirculation modulating valve, one-level exhaust pressure relief pipeline is provided with one-level exhaust pressure relief valve.The data that PLC gathers according to pressure transducer, carry out com-parison and analysis, thus regulate one-level exhaust gas recirculation modulating valve or one-level exhaust pressure relief valve, reach the object that exhaust pressure is stable.Secondary helical-lobe compressor adopts same controlling device.Greatly improve the automaticity of system, add operational reliability.
A kind of two-stage helical-lobe compressor exhaust pressure antihunt means, concrete steps are as follows:
The first step, selection control mode: control mode is adjusted to " manual mode ";
Second step, setting parameter: the electric machine frequency of setting one-level variable-frequency motor and secondary variable-frequency motor, is set as 0% by the aperture of one-level exhaust gas recirculation modulating valve and secondary exhaust return valve;
3rd step, start;
4th step, manual tune parameter; The electric machine frequency of manual tune one-level variable-frequency motor and secondary variable-frequency motor, makes one-level exhaust pressure and secondary exhaust pressure reach setting value;
5th step, switching controls pattern: one-level exhaust pressure and secondary exhaust pressure actual value undulate quantity be no more than setting value ± 1%, and stable operation 2 minutes; Be " automatic mode " by control mode switch;
6th step, PLC control automatically:
The one-level exhaust pressure actual value of one-level exhaust pressure transmitter collection and setting value compare by PLC;
When one-level exhaust pressure actual value is lower than one-level exhaust pressure setting value, is improved the frequency of one-level variable-frequency motor by PLC, and reduce the aperture of one-level return valve, make one-level exhaust pressure actual value reach setting value; If more than 2 seconds still lower than setting value, close one-level exhaust pressure relief valve;
When one-level exhaust pressure actual value is higher than one-level exhaust pressure setting value, reduced the frequency of one-level variable-frequency motor by PLC, increase the aperture of one-level return valve simultaneously, make one-level exhaust pressure actual value reach setting value; If more than 2 seconds still higher than setting value, PLC controls one-level exhaust pressure relief valve and opens, until one-level exhaust pressure actual value is lower than closing this one-level exhaust pressure relief valve during setting value;
Meanwhile, the secondary exhaust pressure actual value of secondary exhaust pressure transmitter collection and setting value compare by PLC;
When secondary exhaust pressure actual value is lower than secondary exhaust pressure set points, is improved the frequency of secondary variable-frequency motor by PLC, and reduce the aperture of secondary return valve, make secondary exhaust pressure actual value reach setting value; If more than 2 seconds still lower than setting value, close one-level exhaust pressure relief valve; ;
When secondary exhaust pressure actual value is higher than secondary exhaust pressure set points, reduced the frequency of secondary variable-frequency motor by PLC, increase the aperture of secondary return valve simultaneously, make secondary exhaust pressure actual value reach setting value; If more than 2 seconds still higher than setting value, PLC controls one-level exhaust pressure relief valve and opens, until one-level exhaust pressure actual value is lower than closing this one-level exhaust pressure relief valve during setting value.
The utility model adopts PLC autocontrol method, greatly improves the automation function of equipment, reduces the degree of dependence to people, and improve equipment reliability of operation, thus improve manufacturing efficiency.
Accompanying drawing explanation
Fig. 1 is structure drawing of device of the present utility model;
Fig. 2 is control flow chart of the present utility model;
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
Fig. 1 illustrates the utility model mode of execution, wherein two-stage helical-lobe compressor exhaust pressure stabilizer it comprise front buffer tank 2, this front buffer tank is connected with the suction port of one-level helical-lobe compressor 4 by one-level air inlet pipeline 3.The air outlet of one-level helical-lobe compressor 4 is connected with first-level buffer tank 9 by one-level gas exhaust piping 6.Virgin gas 1 enters one-level helical-lobe compressor 4 by prefilter knock out drum 2, and discharge after one-level helical-lobe compressor 4 compresses, the virgin gas of discharge enters first-level buffer tank 9 by one-level gas exhaust piping 6.
One-level helical-lobe compressor 4 is driven by one-level variable-frequency motor 5, and one-level variable-frequency motor 5 is controlled by PLC26.One-level gas exhaust piping 6 is provided with one-level exhaust pressure transmitter 8, and this one-level exhaust pressure transmitter 8 is connected with PLC.First-level buffer tank 9 top is connected with front buffer tank 2 by one-level exhaust gas recirculation pipeline 10; One-level exhaust gas recirculation pipeline 10 is provided with one-level return valve 11; This one-level return valve 11 is by PLC regulating and controlling.First-level buffer tank 9 top is also provided with one-level exhaust pressure relief pipeline 12, and this one-level exhaust pressure relief pipeline 12 connects front buffer tank 2; One-level exhaust pressure relief pipeline 12 is installed one-level exhaust pressure relief valve 13, and this one-level exhaust pressure relief valve 13 is by PLC regulating and controlling.
When one-level exhaust pressure fluctuates, first adjusted by one-level variable-frequency motor and one-level return valve; Exceed setting value in exhaust pressure, if the adjustment of one-level variable-frequency motor and one-level return valve cannot stablize one-level exhaust pressure, then open one-level exhaust pressure relief valve and carry out pressure release, finally reach the object of stable one-level exhaust pressure.
Its one-level exhaust pressure control procedure is such: the one-level exhaust pressure actual value that one-level exhaust pressure transmitter 8 gathers by PLC and setting value compare;
(1) when one-level exhaust pressure actual value is lower than one-level exhaust pressure setting value, improved the frequency of one-level variable-frequency motor 5 by PLC, and reduce the aperture of one-level return valve 11, make one-level exhaust pressure actual value reach setting value.If more than 2 seconds still lower than setting value, close one-level exhaust pressure relief valve 13.
(2) when one-level exhaust pressure actual value is higher than one-level exhaust pressure setting value, reduced the frequency of one-level variable-frequency motor 5 by PLC, increase the aperture of one-level return valve 11 simultaneously, make one-level exhaust pressure actual value reach setting value; If more than 2 seconds still higher than setting value, PLC controls one-level exhaust pressure relief valve 13 and opens, until one-level exhaust pressure actual value is lower than closing this one-level exhaust pressure relief valve 13 during setting value.
The top of first-level buffer tank 9 is connected with the suction port of secondary helical-lobe compressor 15 by secondary inlet pipeline 14, and this secondary helical-lobe compressor 15 is driven by secondary variable-frequency motor 16, and this secondary variable-frequency motor 16 is controlled by PLC26.The air outlet of secondary helical-lobe compressor 15 is connected with level 2 buffering tank 20 by secondary exhaust pipeline 17.One stage of compression virgin gas in first-level buffer tank 9 enters secondary helical-lobe compressor 15 by secondary inlet pipe 14, after secondary helical-lobe compressor 15 compresses, enter level 2 buffering tank 20 by secondary exhaust pipeline 17.
Secondary exhaust pipeline 17 is provided with secondary exhaust pressure transmitter 19, and this secondary exhaust pressure transmitter 19 is connected with PLC.Level 2 buffering tank 20 top is connected with front buffer tank 2 by secondary exhaust return line 21; Secondary exhaust return line 21 is provided with secondary return valve 22; This secondary modulating valve 22 is by PLC26 regulating and controlling.Level 2 buffering tank 20 top is also provided with secondary exhaust pressure relief pipe 23, and this secondary exhaust pressure relief pipe 23 connects front buffer tank 2; Secondary exhaust pressure relief pipe 23 is installed secondary exhaust Decompression valves 24, and this secondary exhaust Decompression valves 24 is by PLC26 regulating and controlling.
When secondary exhaust pressure surge, first adjusted by secondary variable-frequency motor and one-level return valve; Exceed setting value at secondary exhaust pressure, if the adjustment of secondary variable-frequency motor and secondary return valve cannot stablize secondary exhaust pressure, then open secondary exhaust Decompression valves and carry out pressure release, finally reach the object of stable secondary exhaust pressure.
Secondary exhaust pressure control procedure is such: the secondary exhaust pressure actual value that secondary exhaust pressure transmitter 19 gathers by PLC and setting value compare;
(1) when secondary exhaust pressure actual value is lower than secondary exhaust pressure set points, improved the frequency of secondary variable-frequency motor 16 by PLC, and reduce the aperture of secondary return valve 22, make secondary exhaust pressure actual value reach setting value.If more than 2 seconds still lower than setting value, close secondary exhaust Decompression valves 24.
(2) when secondary exhaust pressure actual value is higher than secondary exhaust pressure set points, reduced the frequency of secondary variable-frequency motor 16 by PLC, increase the aperture of secondary return valve 22 simultaneously, make secondary exhaust pressure actual value reach setting value; If more than 2 seconds still higher than setting value, PLC controls secondary exhaust Decompression valves 24 and opens, until secondary exhaust pressure actual value is lower than closing this secondary exhaust Decompression valves 24 during setting value.
As shown in Figure 2, a kind of two-stage helical-lobe compressor exhaust pressure antihunt means, concrete steps are as follows:
The first step, selection control mode: control mode is adjusted to " manual mode ";
Second step, setting parameter: the electric machine frequency of setting one-level variable-frequency motor and secondary variable-frequency motor, is set as 0% by the aperture of one-level exhaust gas recirculation modulating valve and secondary exhaust return valve;
3rd step, start;
4th step, manual tune parameter; The electric machine frequency of manual tune one-level variable-frequency motor and secondary variable-frequency motor, makes one-level exhaust pressure and secondary exhaust pressure reach setting value;
5th step, switching controls pattern: one-level exhaust pressure and secondary exhaust pressure actual value undulate quantity be no more than setting value ± 1%, and stable operation 2 minutes; Be " automatic mode " by control mode switch;
6th step, PLC control automatically:
The one-level exhaust pressure actual value that one-level exhaust pressure transmitter 8 gathers by PLC and setting value compare;
When one-level exhaust pressure actual value is lower than one-level exhaust pressure setting value, is improved the frequency of one-level variable-frequency motor 5 by PLC, and reduce the aperture of one-level return valve 11, make one-level exhaust pressure actual value reach setting value; If more than 2 seconds still lower than setting value, close one-level exhaust pressure relief valve 13;
When one-level exhaust pressure actual value is higher than one-level exhaust pressure setting value, reduced the frequency of one-level variable-frequency motor 5 by PLC, increase the aperture of one-level return valve 11 simultaneously, make one-level exhaust pressure actual value reach setting value; If more than 2 seconds still higher than setting value, PLC controls one-level exhaust pressure relief valve 13 and opens, until one-level exhaust pressure actual value is lower than closing this one-level exhaust pressure relief valve 13 during setting value;
Meanwhile, the secondary exhaust pressure actual value that gathered by secondary exhaust pressure transmitter 19 of PLC and setting value compare;
When secondary exhaust pressure actual value is lower than secondary exhaust pressure set points, is improved the frequency of secondary variable-frequency motor 16 by PLC, and reduce the aperture of secondary return valve 22, make secondary exhaust pressure actual value reach setting value; If more than 2 seconds still lower than setting value, close secondary exhaust Decompression valves 24;
When secondary exhaust pressure actual value is higher than secondary exhaust pressure set points, reduced the frequency of secondary variable-frequency motor 16 by PLC, increase the aperture of secondary return valve 22 simultaneously, make secondary exhaust pressure actual value reach setting value; If more than 2 seconds still higher than setting value, PLC controls secondary exhaust Decompression valves 24 and opens, until secondary exhaust pressure actual value is lower than closing this secondary exhaust Decompression valves 24 during setting value.
The utility model adds return valve and exhaust pressure relief valve on the basis of existing technology, and this return valve and exhaust pressure relief valve are by PLC regulating and controlling.PLC calculates according to the actual value of exhaust pressure and setting value, and then regulates exhaust gas reflux valve and exhaust pressure relief valve, ensure that the stability of exhaust pressure, substantially increases the automaticity of system, add operational reliability.And two-stage regulates carries out, interrelated simultaneously.
Claims (2)
1. a two-stage helical-lobe compressor exhaust pressure stabilizer, comprises front buffer tank (2), and this front buffer tank (2) is connected by the suction port of one-level air inlet pipeline (3) with one-level helical-lobe compressor (4); The air outlet of this one-level helical-lobe compressor (4) is connected with first-level buffer tank (9) by one-level gas exhaust piping (6); The top of this first-level buffer tank (9) is connected with the suction port of secondary helical-lobe compressor (15) by secondary inlet pipeline (14), and the air outlet of this secondary helical-lobe compressor (15) is connected with level 2 buffering tank (20) by secondary exhaust pipeline (17); Described one-level gas exhaust piping (6) is provided with one-level exhaust pressure transmitter (8), described secondary exhaust pipeline (17) is provided with secondary exhaust pressure transmitter (19), and described one-level exhaust pressure transmitter (8) is connected with PLC (26) with level exhaust pressure transmitter (19); It is characterized in that:
Described first-level buffer tank (9) top is connected with described front buffer tank (2) by one-level exhaust gas recirculation pipeline (10); Described one-level exhaust gas recirculation pipeline (10) is provided with one-level return valve (11); This one-level return valve (11) is connected with described PLC (26); Described first-level buffer tank (9) top is also provided with one-level exhaust pressure relief pipeline (12), and this one-level exhaust pressure relief pipeline (12) connects described front buffer tank (2); Described one-level exhaust pressure relief pipeline (12) upper installation one-level exhaust pressure relief valve (13), this one-level exhaust pressure relief valve (13) is connected with described PLC (26);
Described level 2 buffering tank (20) top is connected with described front buffer tank (2) by secondary exhaust return line (21); Described secondary exhaust return line (21) is provided with secondary return valve (22); This secondary return valve (22) is connected with described PLC (26); Described level 2 buffering tank (20) top is also provided with secondary exhaust pressure relief pipe (23), and this secondary exhaust pressure relief pipe (23) connects described front buffer tank (2); Described secondary exhaust pressure relief pipe (23) upper installation secondary exhaust Decompression valves (24), this secondary exhaust Decompression valves (24) is connected with described PLC (26).
2. two-stage helical-lobe compressor exhaust pressure stabilizer according to claim 1, it is characterized in that: described one-level helical-lobe compressor (4) is driven by one-level variable-frequency motor (5), and this one-level variable-frequency motor (5) is connected with described PLC (26); Described secondary helical-lobe compressor (15) is driven by secondary variable-frequency motor (16), and this secondary variable-frequency motor (16) is connected with described PLC (26).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520094702.0U CN204493196U (en) | 2015-02-07 | 2015-02-07 | A kind of two-stage helical-lobe compressor exhaust pressure stabilizer |
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| CN201520094702.0U CN204493196U (en) | 2015-02-07 | 2015-02-07 | A kind of two-stage helical-lobe compressor exhaust pressure stabilizer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747453A (en) * | 2015-02-07 | 2015-07-01 | 宁波鲍斯能源装备股份有限公司 | Two-stage screw compressor discharge pressure stabilizing device and two-stage screw compressor discharge pressure stabilizing method |
| CN107297613A (en) * | 2016-04-15 | 2017-10-27 | 中国石油天然气股份有限公司 | Installation tool and compressor |
| CN107570099A (en) * | 2017-09-28 | 2018-01-12 | 上海国强生化工程装备有限公司 | A kind of tank pressure control device of parallel reactor |
| CN110005601A (en) * | 2019-04-02 | 2019-07-12 | 苏州牧风压缩机设备有限公司 | A kind of control method of the bipolar compression magneto of air compressor machine |
| CN107297613B (en) * | 2016-04-15 | 2024-04-30 | 中国石油天然气股份有限公司 | Mounting tool and compressor |
-
2015
- 2015-02-07 CN CN201520094702.0U patent/CN204493196U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747453A (en) * | 2015-02-07 | 2015-07-01 | 宁波鲍斯能源装备股份有限公司 | Two-stage screw compressor discharge pressure stabilizing device and two-stage screw compressor discharge pressure stabilizing method |
| CN107297613A (en) * | 2016-04-15 | 2017-10-27 | 中国石油天然气股份有限公司 | Installation tool and compressor |
| CN107297613B (en) * | 2016-04-15 | 2024-04-30 | 中国石油天然气股份有限公司 | Mounting tool and compressor |
| CN107570099A (en) * | 2017-09-28 | 2018-01-12 | 上海国强生化工程装备有限公司 | A kind of tank pressure control device of parallel reactor |
| CN107570099B (en) * | 2017-09-28 | 2023-08-25 | 上海国强生化工程装备有限公司 | Tank pressure control device of parallel reactor |
| CN110005601A (en) * | 2019-04-02 | 2019-07-12 | 苏州牧风压缩机设备有限公司 | A kind of control method of the bipolar compression magneto of air compressor machine |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150722 Effective date of abandoning: 20170510 |
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| AV01 | Patent right actively abandoned |