CN103064438A - Safety venting system of pressure vessel and control method thereof - Google Patents
Safety venting system of pressure vessel and control method thereof Download PDFInfo
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- CN103064438A CN103064438A CN2012105708879A CN201210570887A CN103064438A CN 103064438 A CN103064438 A CN 103064438A CN 2012105708879 A CN2012105708879 A CN 2012105708879A CN 201210570887 A CN201210570887 A CN 201210570887A CN 103064438 A CN103064438 A CN 103064438A
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Abstract
The invention discloses a safety venting system of a pressure vessel which comprises the pressure vessel, wherein a pressure sensor is arranged on the outer wall of the pressure vessel, a cut-off valve and an adjusting valve are sequentially arranged on a venting pipeline of the pressure vessel along the outflow direction of mediums, an output end of the pressure sensor is connected with an input end of a main control module, and an output end of the main control module is connected with signal input ends of the cut-off valve and the adjusting valve. The invention further discloses a control method of the safety venting system of the pressure vessel. An opening degree of valves is adjusted according to different pressure in the pressure vessel, a gas flow rate is controlled effectively when the pressure vessel is vented, and possibility of accidents is lowered. The mode of remote automatic control is adopted, manual operation is not required, works of operation staff are simplified, the safety venting system is safe and reliable, investment cost of the equipment is low, and the safety venting system is convenient to implement.
Description
Technical field
The present invention relates to the industrial control technology field, be specifically related to the pressure vessel blowdown system.
Background technology
Reactor is a kind of pressure vessel common in the chemical process, reactor emptying is the indispensable step of technological process, at some in particular cases, gaseous tension in the reactor is higher, and may contain some flammable explosive gas in the gas, gas flow rate might cause security incident too soon during emptying, has potential safety hazard, just need to control the aperture of the emptying valve of reactor in this case, the gas flow rate in the exhausting pipeline is controlled in the safe range.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of pressure vessel safety blowdown system and control method thereof, can solve existing pressure vessel in the situation that pressure medium is high, may exist flammable explosive gas to have the problem of potential safety hazard.
The present invention is achieved through the following technical solutions:
The pressure vessel safety blowdown system, comprise pressure vessel, the outer wall of described pressure vessel is provided with pressure transducer, be provided with successively cutting-off valve, control valve along the MEDIA FLOW outgoing direction on the exhausting pipeline of described pressure vessel, the output terminal of described pressure transducer connects the input end of main control module, and the output terminal of described main control module is connected with the signal input part of cutting-off valve, control valve respectively.
Further scheme of the present invention is that pressure vessel is reactor.
Further scheme of the present invention is that pressure transducer is pressure unit.
Further scheme of the present invention is, main control module is the master control fastener of DCS Distributed Control System (DCS), and the output terminal of described pressure transducer is connected with the input end of master control fastener by AI fastener, data retransmission fastener successively; The output terminal of described master control fastener is connected with the signal input part of cutting-off valve by data retransmission fastener, DO fastener successively, and is connected with the signal input part of control valve by data retransmission fastener, AO fastener successively; Described master control fastener is connected with the HMI monitoring and display system in the mode of communication.
The control method of pressure vessel safety blowdown system may further comprise the steps:
(1) setting cutting-off valve AV opens;
(2) according to pressure range under the pressure P of pressure transducer feedback, set the corresponding aperture of control valve CV, until the pressure transducer data measured is 0;
(3) setting cutting-off valve AV and control valve CV closes.
The further improvement of the present invention scheme is that the corresponding aperture of pressure range and control valve CV is under the P:
20 bar＜P, CV aperture 5%;
16 bar＜P＜=20 bar, CV aperture 10%;
12 bar＜P＜=16 bar, CV aperture 20%;
8 bar＜P＜=12 bar, CV aperture 30%;
4 bar＜P＜=8 bar, CV aperture 50%;
2 bar＜P＜=4 bar, CV aperture 80%;
0 bar＜P＜=2 bar, CV aperture 100%;
P=0 bar, CV aperture 0.
DCS Distributed Control System (DCS) of the present invention can substitute with the controller that PLC Programmable Logic Controller, single-chip microcomputer etc. have a logic judging function, is easily to realize to those skilled in the art.
The present invention's advantage compared with prior art is:
One, adjust the aperture of control valve for different pressures in the pressure vessel, the gas flow rate during effective controlled pressure container emptying has reduced the possibility that security incident occurs;
Two, adopt the mode of remote auto control, do not need manually-operated, simplified operating personnel's work, and safe and reliable;
Three, equipment funds less investment, it is convenient to implement.
Description of drawings
Fig. 1 is pressure vessel safety blowdown system structural representation.
Fig. 2 is the process flow diagram of pressure vessel safety blowdown system control method.
Embodiment
Pressure vessel safety blowdown system as shown in Figure 1, comprise pressure vessel 1, the outer wall of described pressure vessel 1 is provided with pressure transducer 2, be provided with successively cutting-off valve 3, control valve 4 along the MEDIA FLOW outgoing direction on the exhausting pipeline of described pressure vessel 1, the output terminal of described pressure transducer 2 connects the input end of main control module 5, and the output terminal of described main control module 5 is connected with the signal input part of cutting-off valve 3, control valve 4 respectively.
Above-mentioned pressure vessel 1 is reactor.
Above-mentioned pressure transducer 2 is pressure unit.
Above-mentioned main control module 5 is the master control fastener of DCS Distributed Control System (DCS), and the output terminal of described pressure transducer 2 is connected with the input end of master control fastener by AI fastener, data retransmission fastener successively; The output terminal of described master control fastener is connected with the signal input part of cutting-off valve 3 by data retransmission fastener, DO fastener successively, and is connected with the signal input part of control valve 4 by data retransmission fastener, AO fastener successively; Described master control fastener is connected with the HMI monitoring and display system in the mode of communication.
The control method of pressure vessel safety blowdown system may further comprise the steps:
(1) setting cutting-off valve AV opens;
(2) according to pressure range under the pressure P of pressure transducer feedback, set the corresponding aperture of control valve CV, until the pressure transducer data measured is 0;
(3) setting cutting-off valve AV and control valve CV closes.
The control method of above-mentioned pressure vessel safety blowdown system, wherein the corresponding aperture of pressure range and control valve CV is under the P:
20 bar＜P, CV aperture 5%;
16 bar＜P＜=20 bar, CV aperture 10%;
12 bar＜P＜=16 bar, CV aperture 20%;
8 bar＜P＜=12 bar, CV aperture 30%;
4 bar＜P＜=8 bar, CV aperture 50%;
2 bar＜P＜=4 bar, CV aperture 80%;
0 bar＜P＜=2 bar, CV aperture 100%;
P=0 bar, CV aperture 0.
Claims (6)
1. pressure vessel safety blowdown system, comprise pressure vessel (1), the outer wall of described pressure vessel (1) is provided with pressure transducer (2), it is characterized in that: be provided with successively cutting-off valve (3), control valve (4) along the MEDIA FLOW outgoing direction on the exhausting pipeline of described pressure vessel (1), the output terminal of described pressure transducer (2) connects the input end of main control module (5), and the output terminal of described main control module (5) is connected with the signal input part of cutting-off valve (3), control valve (4) respectively.
2. pressure vessel safety blowdown system as claimed in claim 1, it is characterized in that: described pressure vessel (1) is reactor.
3. pressure vessel safety blowdown system as claimed in claim 1, it is characterized in that: described pressure transducer (2) is pressure unit.
4. pressure vessel safety blowdown system as claimed in claim 1, it is characterized in that: described main control module (5) is the master control fastener of DCS Distributed Control System (DCS), and the output terminal of described pressure transducer (2) is connected with the input end of master control fastener by AI fastener, data retransmission fastener successively; The output terminal of described master control fastener is connected with the signal input part of cutting-off valve (3) by data retransmission fastener, DO fastener successively, and is connected with the signal input part of control valve (4) by data retransmission fastener, AO fastener successively; Described master control fastener is connected with the HMI monitoring and display system in the mode of communication.
5. the control method of pressure vessel safety blowdown system is characterized in that: may further comprise the steps:
(1) setting cutting-off valve AV opens;
(2) according to pressure range under the pressure P of pressure transducer feedback, set the corresponding aperture of control valve CV, until the pressure transducer data measured is 0;
(3) setting cutting-off valve AV and control valve CV closes.
6. the control method of pressure vessel safety blowdown system as claimed in claim 5, wherein the corresponding aperture of pressure range and control valve CV is under the P:
20 bar＜P, CV aperture 5%;
16 bar＜P＜=20 bar, CV aperture 10%;
12 bar＜P＜=16 bar, CV aperture 20%;
8 bar＜P＜=12 bar, CV aperture 30%;
4 bar＜P＜=8 bar, CV aperture 50%;
2 bar＜P＜=4 bar, CV aperture 80%;
0 bar＜P＜=2 bar, CV aperture 100%;
P=0 bar, CV aperture 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105708879A CN103064438A (en) | 2012-12-26 | 2012-12-26 | Safety venting system of pressure vessel and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105708879A CN103064438A (en) | 2012-12-26 | 2012-12-26 | Safety venting system of pressure vessel and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103064438A true CN103064438A (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105708879A Pending CN103064438A (en) | 2012-12-26 | 2012-12-26 | Safety venting system of pressure vessel and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631125A (en) * | 2019-09-18 | 2019-12-31 | 鲁西化工集团股份有限公司煤化工二分公司 | Emptying control system and method of high back pressure system |
| CN111734946A (en) * | 2020-07-04 | 2020-10-02 | 南京天人环保设备有限公司 | Overpressure protector for biogas double-membrane gas storage cabinet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5269341A (en) * | 1993-04-13 | 1993-12-14 | Halliburton Company | Controlled high pressure relief for small volumes |
| GB2398874A (en) * | 2003-01-28 | 2004-09-01 | Magnex Scient Ltd | Cryogenic vessel boil-off monitoring system |
| CN201249115Y (en) * | 2008-08-21 | 2009-06-03 | 杭州科利化工有限公司 | Bottom connected monomer unit of reaction kettle |
| CN102417286A (en) * | 2011-12-16 | 2012-04-18 | 北京机电院高技术股份有限公司 | Steam pressure relief method and device for sludge hydrothermal drying steam pyrolysis reaction kettle |
| CN202490617U (en) * | 2012-03-03 | 2012-10-17 | 潍坊创高信息科技有限公司 | Safety reaction still |
-
2012
- 2012-12-26 CN CN2012105708879A patent/CN103064438A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5269341A (en) * | 1993-04-13 | 1993-12-14 | Halliburton Company | Controlled high pressure relief for small volumes |
| GB2398874A (en) * | 2003-01-28 | 2004-09-01 | Magnex Scient Ltd | Cryogenic vessel boil-off monitoring system |
| CN201249115Y (en) * | 2008-08-21 | 2009-06-03 | 杭州科利化工有限公司 | Bottom connected monomer unit of reaction kettle |
| CN102417286A (en) * | 2011-12-16 | 2012-04-18 | 北京机电院高技术股份有限公司 | Steam pressure relief method and device for sludge hydrothermal drying steam pyrolysis reaction kettle |
| CN202490617U (en) * | 2012-03-03 | 2012-10-17 | 潍坊创高信息科技有限公司 | Safety reaction still |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631125A (en) * | 2019-09-18 | 2019-12-31 | 鲁西化工集团股份有限公司煤化工二分公司 | Emptying control system and method of high back pressure system |
| CN111734946A (en) * | 2020-07-04 | 2020-10-02 | 南京天人环保设备有限公司 | Overpressure protector for biogas double-membrane gas storage cabinet |
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Application publication date: 20130424 |