CN1334495A - Method for realizing stable and continuously adjustable flow of gas and liquid in large range - Google Patents
Method for realizing stable and continuously adjustable flow of gas and liquid in large range Download PDFInfo
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- CN1334495A CN1334495A CN 01131462 CN01131462A CN1334495A CN 1334495 A CN1334495 A CN 1334495A CN 01131462 CN01131462 CN 01131462 CN 01131462 A CN01131462 A CN 01131462A CN 1334495 A CN1334495 A CN 1334495A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 title claims abstract description 11
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000005514 two-phase flow Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
A method for realizing the stable and continuously adjustable flow of gas and liquid in a large range belongs to the stable control technology of gas and liquid flow in the research of two-phase flow or multiphase flow. The purpose of continuously adjusting the flow of the fluid in a large range is realized by organically combining a variable frequency speed regulation technology and a throttle valve regulation technology. The variable frequency speed regulation ensures the stable pressure of the gas storage tank, the adjustable range of the pressure is large, the electric energy consumption of the compressor is saved, the service life of the compressor is prolonged, and the gas supply quantity of the reciprocating compressor is relatively stable, and the flow of the output gas is very stable after the outlet of the gas storage tank is matched with the flow control valve.
Description
The present invention relates to a kind of realization gas-liquid stability of flow and continuously adjustable method on a large scale, this method belongs to the stable control technology to gas-liquid flow in diphasic flow or the heterogeneous mobile research.It mainly is that combination by comprehensive use variable-frequency control technique and throttle valve adjustment technology realizes the continuously adjustable purpose of fluid flow on a large scale.
At present, in industries such as oil, chemical industry, metallurgy, during by the reciprocating compressor air feed, all need, and require to accomplish continuously adjustable the stable control of bleed pressure, flow on a large scale.For guaranteeing the stable of compressor delivery pressure, existing all kinds of reciprocating compressor generally has the mechanical compression regulating device, but this class regulating device is owing to character such as the intrinsic elastic hysteresis of its governor motion, dead band can only make the gas-holder pressure that links to each other with compressor outlet fluctuate in a certain pressure limit up and down in setting value; Also the someone adopted the on off state of being controlled the compressor air suction valve by compressor delivery pressure, make the air feed bleed pressure stable, but effect was bad.More than the shortcoming of two kinds of methods be that not only gas-holder pressure is difficult to stablize, and pressure control range is little.In addition, gas-holder outlet is controlled the exit gas flow with variable valve sometimes, but because the fluctuation of the pressure of source of the gas own directly influences variable valve goes out, the stability of mouthful flow therefore can not obtain stable air-flow, and adjustable extent also is subjected to certain limitation.
Purpose of the present invention provides a kind of realization gas-liquid stability of flow and continuously adjustable method on a large scale with regard to being to avoid above-mentioned the deficiencies in the prior art part.This method mainly is that to control the gas-liquid flow preferably be a certain setting value to two kinds of prior aries of regulation technology of comprehensive utilization variable-frequency control technique and throttling valve.The major technique characteristics of this method are that this method is to adopt frequency control to control the rotating speed of air compressor, and then the control bleed pressure, and control the flow of output gas by regulating throttling valve, thereby reach stable and continuously adjustable purpose.
Accompanying drawing is the schematic diagram that originally carries out an invention.
The drawing of accompanying drawing is described as follows:
1---variable-frequence governor 2---gas-holder 3---compressor 4---flow regulator
5---variable valve 6---pressure unit 7---flow variator
Below in conjunction with drawings and Examples in detail technical characterstic of the present invention is described in detail:
When reality is implemented stability of flow of gas-liquid on a large scale provided by the present invention and continuously adjustable method, the inventor has designed principle process as shown in drawings, and its specific embodiments is achieved in that variable-frequence governor (1) regulates the rotating speed of compressor (3) according to the pressure of gas-holder (2); When gas consumption one regularly, the different rotating speed of compressor (3) is just corresponding to some setting values of gas-holder (2) pressure, thus the pressure surge scope that can guarantee gas-holder (2) is very little; Simultaneously, gas-holder (2) exports by regulator (4) the gas flow setting value as requested and the aperture of detected value regulating and controlling valve (5), and the gas flow of assurance system output is further stable.
The actual test of carrying out on the circular track test device of Petroleum Univ. (East China), its process conditions are: gas flow variation range: 1----1000m
3/ h, fluid flow: 1----100m
3/ h, bleed pressure: 0.8MPa.Gas vent flow rate fluctuation situation under approximate same process condition is verified control effect behind employing the present invention by contrast prior art and the present invention.The process conditions of experiment are: gas flow control setting value is 510m
3/ h, fluid flow setting value are 30m
3/ h, result of experiment is as follows:
Adopt the control of compressor machinery and the control method of gas-holder outlet regulating valve throttling to obtain: the about 550m of the maximal value of gas flow
3/ h, the about 440m of minimum value
3/ h, flow mean value are 498.23m
3/ h, standard deviation is 6=24.73m
3/ h.
Adopt technological parameter of the present invention to be: gas flow control setting value is 500m
3/ h, the fluid flow setting value is 25m
3/ h, mean value are 499.6m
3/ h, standard deviation 6=6.86m
3/ h.
This employing variable frequency regulating speed control air compressor rotating speed, and then control bleed pressure, and control output gas flow of gas with variable valve, facts have proved that effect is better.Compared with prior art, advantage of the present invention is: frequency control guarantees the gas-holder pressure stability, and the adjustable in pressure scope is big, saves the compressor power consumption, prolongs the compressor life-span, and makes the air demand of reciprocating compressor relatively stable; After the gas-holder outlet is equipped with flowrate control valve, make output gas flow of gas very stable.
Method provided by the present invention is variable frequency control and the regulation technology of resist technology, gas-holder rate of discharge/pressure of air compressor and different gas flow low-converter parameters, the technology of adjusting of regulator parameter; because variable-frequency control technique and variable valve throttling technology are organically combined; both guarantee the stable of bleed pressure, also guaranteed the adjustable continuously of output gas flow of gas on a large scale.
Claims (2)
1. realize gas-liquid stability of flow and continuously adjustable method on a large scale, this method mainly is the regulation technology of integrated use variable-frequency control technique and throttling valve, it is characterized in that this method is to adopt frequency control to control the rotating speed of air compressor, and then control bleed pressure, and control the flow of output gas, thereby reach stable and continuously adjustable purpose by regulating throttling valve.
2. realization according to claim 1 is gas-liquid stability of flow and continuously adjustable method on a large scale, and the concrete enforcement that it is characterized in that this method is achieved in that variable-frequence governor (1) regulates the rotating speed of compressor (3) according to the pressure of gas-holder (2); When gas consumption one regularly, the different rotating speed of compressor (3) is just corresponding to some setting values of gas-holder (2) pressure, thus the pressure surge scope that can guarantee gas-holder (2) is very little; Simultaneously, gas-holder (2) exports by regulator (4) the gas flow setting value as requested and the aperture of detected value regulating and controlling valve (5), and the gas flow of assurance system output is further stable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01131462 CN1334495A (en) | 2001-09-11 | 2001-09-11 | Method for realizing stable and continuously adjustable flow of gas and liquid in large range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01131462 CN1334495A (en) | 2001-09-11 | 2001-09-11 | Method for realizing stable and continuously adjustable flow of gas and liquid in large range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1334495A true CN1334495A (en) | 2002-02-06 |
Family
ID=4670599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01131462 Pending CN1334495A (en) | 2001-09-11 | 2001-09-11 | Method for realizing stable and continuously adjustable flow of gas and liquid in large range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1334495A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334349C (en) * | 2003-03-31 | 2007-08-29 | 日立工机株式会社 | Air compressor and its controlling method |
| CN102430317A (en) * | 2011-09-15 | 2012-05-02 | 林德工程（杭州）有限公司 | Flow control method of molecular sieve in air separation device without disturbance compensation |
| CN109973373A (en) * | 2017-12-28 | 2019-07-05 | 中国船舶重工集团公司第七一一研究所 | To the device and method of single cylinder diesel gas supply |
| CN111810405A (en) * | 2020-08-11 | 2020-10-23 | 河北德茂环保科技有限公司 | Accurate measuring device and accurate controlling means of formula piston pump flow sways |
-
2001
- 2001-09-11 CN CN 01131462 patent/CN1334495A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100334349C (en) * | 2003-03-31 | 2007-08-29 | 日立工机株式会社 | Air compressor and its controlling method |
| CN102430317A (en) * | 2011-09-15 | 2012-05-02 | 林德工程（杭州）有限公司 | Flow control method of molecular sieve in air separation device without disturbance compensation |
| CN102430317B (en) * | 2011-09-15 | 2015-10-28 | 林德工程（杭州）有限公司 | Flow control method of molecular sieve in air separation device without disturbance compensation |
| CN109973373A (en) * | 2017-12-28 | 2019-07-05 | 中国船舶重工集团公司第七一一研究所 | To the device and method of single cylinder diesel gas supply |
| CN111810405A (en) * | 2020-08-11 | 2020-10-23 | 河北德茂环保科技有限公司 | Accurate measuring device and accurate controlling means of formula piston pump flow sways |
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