CN103995494A - Pressure protection system for key equipment of chemical engineering device - Google Patents
Pressure protection system for key equipment of chemical engineering device Download PDFInfo
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- CN103995494A CN103995494A CN201410219527.3A CN201410219527A CN103995494A CN 103995494 A CN103995494 A CN 103995494A CN 201410219527 A CN201410219527 A CN 201410219527A CN 103995494 A CN103995494 A CN 103995494A
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Abstract
The invention provides a pressure protection system for key equipment of a chemical engineering device. The pressure protection system comprises a safety PLC, an isolation circuit, an actuator, a pressure sensor, and an indication and operation panel. The pressure protection system can improve the automatic protection capacity of the key equipment at the moment of overpressure, and has the advantages of being high in reliability and small in investment and reducing workloads of workers, and false operation is little.
Description
Technical field
The present invention relates to chemical industry safety control technology field, relate in particular to a kind of pressure protective system of key equipment of chemical plant installations.
Background technology
Along with the development of economic and technique level, chemical plant installations day by day towards maximizing, the future development such as complicated and integrated.May there are following hazards in the equipment of some chemical plant installationss: 1, temperature, pressure are higher; 2, equipment pressure is subject to supplied materials flow effect large, if occur, supplied materials is collaborated, variable valve fault or maloperation, easily causes equipment superpressure; 3, contain a large amount of inflammable and explosive materials, if device damage causes material from leakage, may cause great fire explosion.
For the hazards of such device, at present main by mounting safety valve or rupture disk, the material of releasing during higher than a certain limit value at pressure, to prevent that equipment superpressure from damaging, but the collection of the material of releasing is a difficult point.In view of the trend of current chemical plant installations equipment enlarging, internal memory material is many, the feature that circular flow is large, and flare system needs processing power very large, and investment is larger.In order to prevent the damage of key equipment, protection personnel's safety, need to have the security control measure that prevents equipment superpressure.
Installing conventional security control measure has " safety instrumented systems " (SIS), and the title using in addition also has " emergency stopping system " (ESD).Unite States Standard (USS) IEC-61508, IEC-61511 and ISA-84.01-2004 etc., GB " functional safety of the safe related system of electrical/electronic/programmable electronic " has been carried out specification to the design of safety instrumented systems.Many patents and document have all been introduced design and the application of safety instrumented systems, introduced the appraisal procedure of functional safety as patent " the functional safety appraisal procedure of safety instrumented systems ", document " SIL technology is in the application of Zhenghai refinery " has been introduced the applicable cases of safety instrumented systems at Zhenghai refinery.These data are generally the introductions of methodology.
High integrality pressure protective system (HIPPS; High Integrity Pressure Protection System) be the one of safety instrumented systems; be used for before this long distance pipeline and oil field; as Zheng Xiaocai has introduced the application of high integrality pressure protective system in NB35-2 project; Yu Manli has introduced the application in production system under water of high integrality pressure protective system, but high integrality pressure protective system is still seldom applied to chemical plant installations.
Summary of the invention
The danger such as device damage, personal injury that may bring for solving the key equipment superpressure of chemical plant installations; prevent the secondary harm of the abnormal release of material bringing due to bleeders such as adopting safety valve or rupture disk; lower the investment of flare system; the present invention adopts high integrality pressure protective system to protect the key equipment of chemical plant installations; in the time occurring that equipment failure, instrument inefficacy, maloperation cause equipment superpressure; can quick acting, protection equipment and personnel's safety.
For solving the problems of the technologies described above, the invention provides a kind of pressure protective system of key equipment of chemical plant installations, it comprises safety PLC controller, buffer circuit, actuator, pressure transducer and instruction and guidance panel;
Described safety PLC controller, for receiving the pressure signal of pressure transducer, carries out decision-making judgement, controls the switch of actuator, completes pressure protecting function, adopts higher grade of SIL safety PLC to prevent from maloperation and control losing efficacy;
Described buffer circuit is realized the isolation of intrinsically safe circuit and immaterial safety circuit;
Described actuator is realized and is cut off fast and effectively material.
Wherein, described safety PLC controller comprises two superfluous Shes' power supply, three superfluous Shes' CPU, two superfluous Shes' I/O fastener and two superfluous She's communication device.
Wherein, described buffer circuit comprises the isolating safety grid joining with AI and the relay joining with DO/DI.
Wherein, described actuator is repid cut-off valve or the variable valve with cutting function.
Wherein, described pressure transducer is arranged on the different parts of key equipment of chemical plant installations, and it is 2 or 3 that number is installed.
Wherein, described instruction and guidance panel comprise device state indicator lamp, stop button and reset key by different level.
The invention provides a kind of pressure protective system of key equipment of chemical plant installations, it comprises safety PLC controller, buffer circuit, actuator, pressure transducer and instruction and guidance panel;
Described safety PLC controller comprises two superfluous Shes' power supply, three superfluous Shes' CPU, two superfluous Shes' I/O fastener and two superfluous She's communication device;
Described buffer circuit comprises the isolating safety grid joining with AI and the relay joining with DO/DI;
Described actuator is repid cut-off valve or the variable valve with cutting function;
Described pressure transducer is arranged on the different parts of key equipment of chemical plant installations;
Described instruction and guidance panel comprise device state indicator lamp, stop button and reset key by different level.
Beneficial effect of the present invention:
Automatic protective capability when the pressure protective system of the key equipment of chemical plant installations provided by the invention can raising equipment occurs superpressure; There is reliability high, the advantage that misoperation is few; Invest less; Reduce workman's workload.
Brief description of the drawings
Fig. 1 a-1d is the schematic diagram of high integrality pressure protective system, comprises a, b, c, tetra-kinds of control programs of d;
Fig. 2 is the hardware configuration composition diagram of the pressure protective system of the key equipment of chemical plant installations provided by the invention.
Embodiment
A pressure protective system for the key equipment of chemical plant installations, it comprises safety PLC controller, buffer circuit, actuator, pressure transducer and instruction and guidance panel.
Described safety PLC controller, for receiving the pressure signal of pressure transducer, carries out decision-making judgement, controls the switch of actuator, completes pressure protecting function, adopts higher grade of SIL safety PLC to prevent from maloperation and control losing efficacy.
Described safety PLC controller comprises two superfluous Shes' power supply, three superfluous Shes' CPU, two superfluous Shes' I/O fastener and two superfluous She's communication device.
Further, described safety PLC controller is only made up of above-mentioned parts.
Described pressure transducer collection site signal, is input to controller through buffer circuit, and control command outputs to actuator by buffer circuit, realizes the safeguard protection under superpressure.
Described safety PLC controller adopts electrical network by UPS, safety PLC controller to be powered.
Described buffer circuit is realized the isolation of intrinsically safe circuit and immaterial safety circuit.
Intrinsically safe circuit: under the test condition of regulation, normally work or the electric spark that produces and thermal effect all can not be lighted the explosive mixture of regulation under the malfunction of regulation circuit.
Described buffer circuit comprises the isolating safety grid joining with AI and the relay joining with DO/DI.
Further, described buffer circuit is only made up of isolating safety grid and relay.
Described actuator is realized and is cut off fast and effectively material.
Described actuator is repid cut-off valve or the variable valve with cutting function, the general Pneumatic piston topworks that adopts, provided with electromagnetic valve, valve position are interrogated back device, gas-holder etc., described actuator is arranged on the feed pipe of key equipment of chemical plant installations, and the installation number of preferred described actuator is 2 or 3.
Preferably, described pressure transducer is intelligent pressure transmitter, and it adopts two-wire system 4～20mA (stack HART signal) output.Be arranged on the different parts of key equipment of chemical plant installations, number be installed and be preferably 2 or 3.
Described instruction and guidance panel comprise device state indicator lamp, stop button and reset key by different level.
Described chemical plant installations is dicumyl peroxide process units, cyclohexanone production apparatus or oxydol production apparatus, described key equipment is in above process units, inside relate to inflammable, explosive or poisonous material, internal memory material is more, the key equipment that superpressure consequence is comparatively serious, as the oxidizing tower in dicumyl peroxide process units, condensation kettle, the decomposing pot of cyclohexanone production apparatus, the hydrogenation tower in oxydol production apparatus.
Below adopt embodiment to describe embodiments of the present invention in detail, to the present invention, how application technology means solve technical matters whereby, and the implementation procedure of reaching technique effect can fully understand and implement according to this.
As shown in Figure 2, pressure protective system, it comprises safety PLC controller, buffer circuit, actuator, pressure transducer and instruction and guidance panel; Described safety PLC controller comprises two superfluous Shes' power supply, three superfluous Shes' CPU, two superfluous Shes' I/O fastener and two superfluous She's communication device; Described buffer circuit comprises the isolating safety grid joining with AI and the relay joining with DO/DI; Described actuator is repid cut-off valve or the variable valve with cutting function; Described pressure transducer is arranged on the different parts of key equipment of chemical plant installations; Described instruction and guidance panel comprise device state indicator lamp, stop button and reset key by different level; pressure transducer collection site signal; be input to controller through buffer circuit, control command outputs to actuator by buffer circuit, realizes the safeguard protection under superpressure.
Fig. 1 a-1d is the schematic diagram of this pressure protective system control program, comprise a, b, c, tetra-kinds of control programs of d, a scheme: pressure transducer adopts three to get two modes (A & B|A & C|B & C) and prevent instrument malfunction, actuator adopts three to get three modes (A|B|C) and carry out same signal and prevent that actuator is failure to actuate;
B scheme: pressure transducer adopts two to get two modes (A|B) and prevent instrument malfunction, actuator adopts three to get three modes (A|B|C) and carry out same signal and prevent that actuator is failure to actuate;
C scheme: pressure transducer adopts three to get two modes (A & B|A & C|B & C) and prevent instrument malfunction, actuator adopts two to get two modes (A|B) and carry out same signal and prevent that actuator is failure to actuate;
D scheme: pressure transducer adopts two to get two modes (A|B) and prevent instrument malfunction, actuator adopts two to get two modes (A|B) and carry out same signal and prevent that actuator is failure to actuate.
All above-mentioned these intellecture properties of primary enforcement, do not set restriction this new product of other forms of enforcement and/or new method.Those skilled in the art will utilize this important information, and foregoing amendment, to realize similar implementation status.But all modifications or transformation belong to the right of reservation based on new product of the present invention.
The above, be only preferred embodiment of the present invention, is not the restriction of the present invention being made to other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present invention, still belong to the protection domain of technical solution of the present invention.
Claims (7)
1. a pressure protective system for the key equipment of chemical plant installations, it comprises safety PLC controller, buffer circuit, actuator, pressure transducer and instruction and guidance panel;
Described safety PLC controller is realized the choice of control strategy, adopts higher grade of SIL safety PLC to prevent from maloperation and control losing efficacy;
Described buffer circuit is realized the isolation of intrinsically safe circuit and immaterial safety circuit;
Described actuator is realized and is cut off fast and effectively material.
2. pressure protective system as claimed in claim 1, is characterized in that: described safety PLC controller comprises two superfluous Shes' power supply, three superfluous Shes' CPU, two superfluous Shes' I/O fastener and two superfluous She's communication device.
3. pressure protective system as claimed in claim 1 or 2, is characterized in that: described buffer circuit comprises the isolating safety grid joining with AI and the relay joining with DO/DI.
4. the pressure protective system as described in claim 1 to 4, is characterized in that: described actuator is repid cut-off valve or the variable valve with cutting function.
5. the pressure protective system as described in claim 1 to 5, is characterized in that: described pressure transducer is arranged on the different parts of key equipment of chemical plant installations, and it is 2 or 3 that number is installed.
6. the pressure protective system as described in claim 1 to 6, is characterized in that: described instruction and guidance panel comprise device state indicator lamp, stop button and reset key by different level.
7. a pressure protective system for the key equipment of chemical plant installations, is characterized in that: comprise safety PLC controller, buffer circuit, actuator, pressure transducer and instruction and guidance panel;
Described safety PLC controller comprises two superfluous Shes' power supply, three superfluous Shes' CPU, two superfluous Shes' I/O fastener and two superfluous She's communication device;
Described buffer circuit comprises the isolating safety grid joining with AI and the relay joining with DO/DI;
Described actuator is repid cut-off valve or the variable valve with cutting function;
Described pressure transducer is arranged on the different parts of key equipment of chemical plant installations;
Described instruction and guidance panel comprise device state indicator lamp, stop button and reset key by different level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219527.3A CN103995494A (en) | 2014-05-22 | 2014-05-22 | Pressure protection system for key equipment of chemical engineering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219527.3A CN103995494A (en) | 2014-05-22 | 2014-05-22 | Pressure protection system for key equipment of chemical engineering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103995494A true CN103995494A (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410219527.3A Pending CN103995494A (en) | 2014-05-22 | 2014-05-22 | Pressure protection system for key equipment of chemical engineering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113052453A (en) * | 2021-03-22 | 2021-06-29 | 中国石油大学(华东) | Torch load regulation and control method based on HIPPS function |
Citations (5)
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| JP2005032008A (en) * | 2003-07-14 | 2005-02-03 | Toshiba Corp | Operation control device |
| CN101414165A (en) * | 2008-11-18 | 2009-04-22 | 浙江大学 | Method for designing recycle hydrogen heating furnace gas pressure safe instrument system |
| RO127346A2 (en) * | 2010-09-17 | 2012-04-30 | Universitatea "Ştefan Cel Mare" Din Suceava | Teaching model |
| CN202615179U (en) * | 2011-12-25 | 2012-12-19 | 安成林 | PLC control system possessing automatic protection function |
| CN203595932U (en) * | 2013-11-01 | 2014-05-14 | 甘肃蓝科石化高新装备股份有限公司 | Emergency shutdown system based on petrochemical collection-storage station |
-
2014
- 2014-05-22 CN CN201410219527.3A patent/CN103995494A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005032008A (en) * | 2003-07-14 | 2005-02-03 | Toshiba Corp | Operation control device |
| CN101414165A (en) * | 2008-11-18 | 2009-04-22 | 浙江大学 | Method for designing recycle hydrogen heating furnace gas pressure safe instrument system |
| RO127346A2 (en) * | 2010-09-17 | 2012-04-30 | Universitatea "Ştefan Cel Mare" Din Suceava | Teaching model |
| CN202615179U (en) * | 2011-12-25 | 2012-12-19 | 安成林 | PLC control system possessing automatic protection function |
| CN203595932U (en) * | 2013-11-01 | 2014-05-14 | 甘肃蓝科石化高新装备股份有限公司 | Emergency shutdown system based on petrochemical collection-storage station |
Non-Patent Citations (2)
| Title |
|---|
| 郑晓彩: "高完整性压力保护系统在NB35-2项目中的应用", 《中国修船》 * |
| 齐洋: "安全仪表系统在化工装置中的应用", 《产业与科技论坛》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113052453A (en) * | 2021-03-22 | 2021-06-29 | 中国石油大学(华东) | Torch load regulation and control method based on HIPPS function |
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Application publication date: 20140820 |