CN109027347B - Pressure vessel pressure relief device with step self-opening - Google Patents
Pressure vessel pressure relief device with step self-opening Download PDFInfo
- Publication number
- CN109027347B CN109027347B CN201811083659.2A CN201811083659A CN109027347B CN 109027347 B CN109027347 B CN 109027347B CN 201811083659 A CN201811083659 A CN 201811083659A CN 109027347 B CN109027347 B CN 109027347B
- Authority
- CN
- China
- Prior art keywords
- relief valve
- safety relief
- pressure
- pressure vessel
- capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 230000035945 sensitivity Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 6
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0332—Safety valves or pressure relief valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses a pressure vessel pressure relief device with a step self-opening type, which is characterized in that: the pressure vessel is provided with a steam supply device and a steam utilization device, and a safety relief valve is arranged between the steam supply device and the steam utilization device; the safety relief valve comprises a small-capacity safety relief valve and a large-capacity safety relief valve, the small-capacity safety relief valve and the large-capacity safety relief valve adopt full-open type safety relief valves directly acted by springs, and the small-capacity safety relief valve and the large-capacity safety relief valve are sequentially arranged along the flowing direction of fluid in the pressure vessel. According to the invention, by arranging the small-capacity safety relief valve and the large-capacity safety relief valve with different discharge amounts, the pressure vessel is ensured to run without overpressure, the starting times of the large-capacity safety relief valve are reduced, the large-capacity safety relief valve is prevented from frequency hopping to damage a sealing surface, the safety and reliability of the pressure vessel in running are improved, and the use cost of the pressure relief device is reduced.
Description
Technical Field
The invention relates to the field of pressure vessel pressure relief, in particular to a step self-opening pressure vessel pressure relief device.
Background
The safety relief valve is an automatic valve that discharges a certain amount of fluid by using the force of the medium itself without an external force to prevent the internal pressure of the system from exceeding a predetermined safety pressure value, i.e., the safety relief valve is a safety member that avoids causing serious accidents of the apparatus. For auxiliary steam header, deaerator, heater and pressure reducer isopiestic vessel in thermal power factory, all select the type according to the biggest pressure release operating mode when setting up the relief valve, the relief valve mouth footpath that uses is great, and the discharge is too big easily to lead to pressure vessel local pressure to drop too fast, and there is certain hysteresis in the pressure decline of entire system, the relief valve takes place the frequency hopping phenomenon, the valve frequency hopping can make the relief valve sealed face ageing with higher speed, greatly reduced relief valve whole life-span causes revealing, still can cause system's pipeline vibration simultaneously, can cause great incident when serious.
Most pressure vessels in the current power plant range, such as an auxiliary steam header, a heating header and a safety pressure relief valve arranged on a temperature and pressure reducer, are basically pressed against the maximum design flow option which can occur to the pressure vessel, and are configured according to one-operation-one-standby mode, so that the use cost is increased; and because the safety relief valve specification has been standardized, the through-flow capacity of the safety relief valve who often takes is greater than the design flow far away, and what happens when power station safety relief valve appears the frequency hopping and sealing surface damage.
Disclosure of Invention
Aiming at the problem that the safety relief valve of the pressure vessel is unreasonable in selection, so that the safety relief valve is frequency-hopped and a sealing surface is aged, thereby causing the leakage of the safety relief valve, the invention provides a step self-opening pressure vessel pressure relief device.
The invention adopts the following technical scheme.
The pressure vessel pressure relief device comprises a pressure vessel and a safety pressure relief valve, wherein one end of the pressure vessel is provided with a steam supply device, the other end of the pressure vessel is provided with a steam utilization device, and the safety pressure relief valve is arranged between the steam supply device and the steam utilization device; the safety relief valve comprises a small-capacity safety relief valve and a large-capacity safety relief valve, and the small-capacity safety relief valve and the large-capacity safety relief valve are sequentially arranged along the flowing direction of fluid in the pressure container.
Preferably, the discharge amount of the small-capacity safety relief valve is set to be more than 90% of the medium flow in the normal operation condition of the pressure vessel.
Preferably, the setting pressure value of the small-capacity safety relief valve is set to be more than or equal to 0.97 times of the design pressure of the pressure container.
Preferably, the discharge amount of the high-capacity safety relief valve is set to be larger than the medium flow of the normal operation condition of the pressure vessel.
Preferably, the setting pressure value of the high-capacity safety relief valve is set to be not more than 1.06 times of the design pressure of the pressure vessel.
Preferably, the small-capacity safety relief valve and the large-capacity safety relief valve are all full-open type safety relief valves directly acted by springs.
Preferably, the steam supply device is not less than one steam supply device.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the small-capacity safety relief valve and the large-capacity safety relief valve with different discharge amounts are arranged, and the small-capacity safety relief valve and the large-capacity safety relief valve adopt the full-open type safety relief valve directly acted by the spring, so that certain requirements are made on specification selection of the small-capacity safety relief valve and the large-capacity safety relief valve, the pressure vessel is ensured to run without overpressure, the starting times of the large-capacity safety relief valve are reduced, the frequency hopping of the large-capacity safety relief valve is avoided to damage a sealing surface, and the safety and reliability of the pressure vessel are improved; the combination of the small-capacity safety relief valve and the large-capacity safety relief valve is selected, so that one large-capacity safety relief valve is reduced, and the use cost of the relief device is reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure, 1 is a small-capacity safety relief valve, 2 is a large-capacity safety relief valve, 3 is a pressure vessel, 4 is a steam supply device A,5 is a steam supply device B, and 6 is a steam utilization device.
Detailed Description
The technical scheme of the invention is further described in detail with reference to the following drawings.
As shown in FIG. 1, the pressure vessel 3 is a pressure vessel pressure relief device with a step self-opening type, and the pressure vessel is a device such as an auxiliary steam header, a deaerator, a heat supply header, a temperature and pressure reducer and the like which are commonly used in a power plant; one end of the pressure vessel 3 is provided with a steam supply device A4 and a steam supply device B5, and the steam supply device A4 and the steam supply device B5 provide a gas source for the pressure vessel 3; the other end of the pressure vessel 3 is provided with a steam utilization device 6, a small-capacity safety relief valve 1 and a large-capacity safety relief valve 2 are arranged between the steam supply device B5 and the steam utilization device 6, the small-capacity safety relief valve 1 and the large-capacity safety relief valve 2 are all full-open type safety relief valves directly acted by springs, and the small-capacity safety relief valve 1 and the large-capacity safety relief valve 2 are sequentially arranged along the flowing direction of fluid in the pressure vessel 3.
The discharge amount of the small-capacity safety relief valve 1 is set to be more than 90% of the medium flow of the normal operation working condition of the pressure vessel 3, and the setting pressure value of the small-capacity safety relief valve 1 is set to be more than or equal to 0.97 times of the design pressure of the pressure vessel 3.
The discharge amount of the high-capacity safety relief valve 2 is set to be larger than the medium flow of the normal operation condition of the pressure vessel 3, and the setting pressure value of the high-capacity safety relief valve 2 is set to be not larger than 1.06 times of the design pressure of the pressure vessel 3.
The working principle of the invention is as follows: because the deviation of the setting pressure of the safety relief valve should not exceed a larger value of + -3% setting pressure or + -0.015 MPa, the setting pressure of the small-capacity safety relief valve 1 takes a value of more than 0.97 times the design pressure of the pressure vessel 3 and less than the design pressure of the pressure vessel 3 in consideration of the partial deviation value.
When the pressure vessel 3 is overpressured, the small-capacity safety relief valve 1 with higher sensitivity is firstly opened to relieve the pressure of the pressure vessel 3, and if the pressure in the pressure vessel 3 is reduced below the setting pressure of the small-capacity safety relief valve 1, the small-capacity safety relief valve 1 is closed, and the pressure vessel 3 is under the normal operation condition.
If the pressure in the pressure vessel 3 continues to rise, the high-capacity safety relief valve 2 is opened, the pressure in the pressure vessel 3 is continuously relieved, the high-capacity safety relief valve 2 is closed until the pressure in the pressure vessel 3 falls below the setting pressure of the high-capacity safety relief valve 2, at the moment, the low-capacity safety relief valve 1 continuously relieves the pressure in the pressure vessel 3 until the pressure in the pressure vessel 3 falls below the setting pressure of the low-capacity safety relief valve 1, and the low-capacity safety relief valve 1 is closed.
In the process, the starting times of the high-capacity safety relief valve 2 are reduced, frequent tripping of the high-capacity safety relief valve 2 is avoided, and the sealing performance of the sealing surface of the high-capacity safety relief valve 2 is ensured.
The small-capacity safety relief valve 1 and the large-capacity safety relief valve 2 are all full-open type safety relief valves with direct springs, and in the whole pressure relief process of the pressure vessel 3, the small-capacity safety relief valve 1 and the large-capacity safety relief valve 2 are mechanically operated without manual operation, and the pressure vessel 3 can realize a step self-open type pressure relief function.
Other techniques refer to the prior art.
The foregoing description of the preferred embodiments of the present invention is not intended to be limiting, and it should be noted that further modifications and changes can be made by those skilled in the art without departing from the technical scope of the present invention, and are intended to be included within the scope of the present invention.
Claims (1)
1. The utility model provides a step is from pressure vessel pressure relief device who opens, includes pressure vessel (3), safety relief valve, its characterized in that: one end of the pressure container (3) is provided with a steam supply device A (4) and a steam supply device B (5), the steam supply device A (4) and the steam supply device B (5) provide air sources for the pressure container (3), the other end of the pressure container (3) is provided with a steam utilization device (6), and a safety relief valve is arranged between the steam supply device and the steam utilization device (6); the safety relief valve comprises a small-capacity safety relief valve (1) and a large-capacity safety relief valve (2), and the small-capacity safety relief valve (1) and the large-capacity safety relief valve (2) are sequentially arranged along the flowing direction of fluid in the pressure container (3);
The discharge amount of the small-capacity safety relief valve (1) is set to be more than 90% of the medium flow of the normal operation working condition of the pressure vessel (3);
The setting pressure value of the small-capacity safety relief valve (1) is set to be more than or equal to 0.97 times of the design pressure of the pressure container (3);
the discharge amount of the high-capacity safety relief valve (2) is set to be larger than the medium flow of the normal operation working condition of the pressure vessel (3);
the setting pressure value of the high-capacity safety relief valve (2) is set to be not more than 1.06 times of the design pressure of the pressure container (3);
the small-capacity safety relief valve (1) and the large-capacity safety relief valve (2) are all full-open type safety relief valves directly acted by springs;
When the pressure vessel (3) is overpressured, the small-capacity safety relief valve (1) with higher sensitivity is firstly opened to relieve the pressure of the pressure vessel (3), and if the pressure in the pressure vessel (3) is reduced below the setting pressure of the small-capacity safety relief valve (1), the small-capacity safety relief valve (1) is closed, and the pressure vessel (3) is under a normal operation condition;
If the pressure in the pressure vessel (3) continues to rise, the high-capacity safety relief valve (2) is opened, the pressure in the pressure vessel (3) is continuously relieved, the high-capacity safety relief valve (2) is closed when the pressure in the pressure vessel (3) is reduced below the setting pressure of the high-capacity safety relief valve (2), the low-capacity safety relief valve (1) continuously relieves the pressure in the pressure vessel (3) at the moment, and the low-capacity safety relief valve (1) is closed when the pressure in the pressure vessel (3) is reduced below the setting pressure of the low-capacity safety relief valve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811083659.2A CN109027347B (en) | 2018-09-18 | 2018-09-18 | Pressure vessel pressure relief device with step self-opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811083659.2A CN109027347B (en) | 2018-09-18 | 2018-09-18 | Pressure vessel pressure relief device with step self-opening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109027347A CN109027347A (en) | 2018-12-18 |
| CN109027347B true CN109027347B (en) | 2024-05-28 |
Family
ID=64622546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811083659.2A Active CN109027347B (en) | 2018-09-18 | 2018-09-18 | Pressure vessel pressure relief device with step self-opening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109027347B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63275865A (en) * | 1987-05-08 | 1988-11-14 | Saginomiya Seisakusho Inc | Double stage reducing valve |
| CN101526430A (en) * | 2009-03-13 | 2009-09-09 | 沈阳化工学院 | Safe pressure relief device suitable for online checkout |
| CN103032612A (en) * | 2012-12-12 | 2013-04-10 | 中国航天科技集团公司第六研究院第十一研究所 | Dual-opening-pressure dual-displacement safety valve |
| CN203082531U (en) * | 2013-02-06 | 2013-07-24 | 徐毅 | ANG (absorption natural gas) and LNG (liquefied natural gas) dual-fuel gas supply system |
| CN203214982U (en) * | 2013-03-18 | 2013-09-25 | 安徽建筑工业学院 | Overpressure relief device with safety valve and rupture disk in series-parallel connection |
| CN205424413U (en) * | 2016-02-29 | 2016-08-03 | 上海十三冶建设有限公司 | Be used for empty interior stainless steel pipeline system of cold box that divides to aerify welded air feeder |
| CN208816761U (en) * | 2018-09-18 | 2019-05-03 | 中国电建集团河南省电力勘测设计院有限公司 | A kind of pressure vessel pressure relief device of step self-opening type |
-
2018
- 2018-09-18 CN CN201811083659.2A patent/CN109027347B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63275865A (en) * | 1987-05-08 | 1988-11-14 | Saginomiya Seisakusho Inc | Double stage reducing valve |
| CN101526430A (en) * | 2009-03-13 | 2009-09-09 | 沈阳化工学院 | Safe pressure relief device suitable for online checkout |
| CN103032612A (en) * | 2012-12-12 | 2013-04-10 | 中国航天科技集团公司第六研究院第十一研究所 | Dual-opening-pressure dual-displacement safety valve |
| CN203082531U (en) * | 2013-02-06 | 2013-07-24 | 徐毅 | ANG (absorption natural gas) and LNG (liquefied natural gas) dual-fuel gas supply system |
| CN203214982U (en) * | 2013-03-18 | 2013-09-25 | 安徽建筑工业学院 | Overpressure relief device with safety valve and rupture disk in series-parallel connection |
| CN205424413U (en) * | 2016-02-29 | 2016-08-03 | 上海十三冶建设有限公司 | Be used for empty interior stainless steel pipeline system of cold box that divides to aerify welded air feeder |
| CN208816761U (en) * | 2018-09-18 | 2019-05-03 | 中国电建集团河南省电力勘测设计院有限公司 | A kind of pressure vessel pressure relief device of step self-opening type |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109027347A (en) | 2018-12-18 |
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