CN205118356U - Valve automatic control anti -backfire system - Google Patents
Valve automatic control anti -backfire system Download PDFInfo
- Publication number
- CN205118356U CN205118356U CN201520454616.6U CN201520454616U CN205118356U CN 205118356 U CN205118356 U CN 205118356U CN 201520454616 U CN201520454616 U CN 201520454616U CN 205118356 U CN205118356 U CN 205118356U
- Authority
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- China
- Prior art keywords
- torch gas
- control valve
- valve
- torch
- gas control
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- Withdrawn - After Issue
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- 239000007789 gas Substances 0.000 claims abstract description 122
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 18
- 230000006837 decompression Effects 0.000 claims description 37
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 238000005496 tempering Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 241000135309 Processus Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model relates to a valve automatic control anti -backfire system, it mainly triggers type relief valve, torch gas control valve and nitrogen gas valve unit by control system, pressure transmitter (and/or flowmeter), depression bar unstability and becomes. This ystem installation is in the flare tip upper reaches. The utility model discloses can release and the anti -backfire all provides dual guarantee for the safety of torch gas, satisfy the flare system to the requirement of anti -backfire facility, and simple process, the equipment investment is few, and the construction volume is little, and the design construction cycle is short, and maintenance cost is low, and it is little to take up an area of the space, but wide application in the flare system of trades such as oil, chemical industry.
Description
Technical field
The utility model is a kind of backfireproof system, relates to a kind of backfireproof system automatically controlled by valve being applied to flare system more specifically.
Background technique
Flare system is oil refinery, petrochemical plant, natural gas processing plant and other can produce requisite safety and environment protection facility in the chemical plant of inflammable gas in process of production, be last one security perimeter of these factories, its safe and stable operation is most important for the safety in production of these factories.
Flare tip is a kind of burner of special shape, and its outlet diameter is with the design of torch gas maximum emptying amount, and under nominal situation, the flow of torch gas is all less is even zero, and tempering, internal combustion even explosion phenomenon may occur flare tip.The selecting properly of backfireproof system and design are the keys ensureing flare system safety.The backfireproof system of flare system must meet following two requirements:
The first, must ensure that torch gas can be disposed to flare tip burning when needed and destroy by fire.Such as, in case of emergency, a large amount of torch gas produces, and now, backfireproof system must can provide enough leakage paths, makes torch gas can be disposed to flare tip in time and burns and destroy by fire, and should not become the obstacle that torch gas releases.
The second, all can prevent air inversion from entering flare system in all cases, prevent torch gas from mixing with air and producing internal combustion or blast.Such as, in torch burning process, torch tolerance reduces rapidly and flow velocity is very low time, backfireproof system must be able to stop air inversion to enter flare system.
In practice in the past, usually use water sealed tank as the backfireproof facility of flare system, as shown in Figure 1.When torch gas pressure is lower, torch gas cannot break through water seal, and air and torch gas can completely cut off by water seal, prevent the generation of tempering phenomenon.In case of emergency, when a large amount of torch gas is released, over-pressure gas can break through the water seal layer of water sealed tank and enter flare tip burning.
Under most operating mode, water sealed tank can safer, protect flare system reliably, but water sealed tank has following shortcoming: it is large that (1) takes up an area space, very flexible; (2) water sealed tank must carry out examination and maintenance every day, to guarantee the water seal height of water sealed tank and to remove the floating oil of waterborne of sealing; (3) when dew point discharges higher than the hot torch gas sealing coolant-temperature gage, torch gas can be condensed into liquid hydrocarbon and gather at this in water sealed tank, if now there is large torch gas discharge operating mode, the liquid hydrocarbon gathered will bring the generation that torch burning part causes " fire rain " into; (4) in cold area, water sealed tank needs to consider frost protection; (5) discharge of low temperature torch gas may cause sealing freezing of water in water sealed tank, blocks torch gas discharge; (6) if row's discharge temperature is higher and will discharge for a long time, and moisturizing is not enough, and the sealing water in water sealed tank by evaporate to dryness, may be communicated with air by water sealed tank after evaporate to dryness, abnormally dangerous; (7) water sealed tank can increase the exhaust resistance of torch gas, and causes the vibration of water sealed tank surrounding conduit; (8) if the processus aboralis of torch gas discharge end meets rainy weather, rainwater forms certain thickness moisture film outward at torch gas blowdown piping.Rainwater and pipeline heat exchange cause managing interior gas temperature rapid drawdown, and pipe interior likely forms negative pressure, thus destroy the water seal effect of torch gas releasing system water sealed tank, form certain potential safety hazard; (9) cleaning of water sealed tank and maintenance work are very pain in the neck feelings, exist because have a large amount of mud in water sealed tank.
Model utility content
A kind of valve that the utility model relates to controls backfireproof system automatically, it forms primarily of control system, pressure transmitter, strut buckling flip-over type Decompression valves, torch gas control valve and nitrogen gas control valve, it is characterized in that: pressure transmitter is installed on torch gas house steward, and be positioned at the upstream of torch gas control valve; As the bypass of torch gas control valve, strut buckling flip-over type Decompression valves and torch gas control valve are installed in parallel; Nitrogen gas control valve is installed on the arm of strut buckling flip-over type Decompression valves and torch gas control valve downstream line; Control system receives the valve position signal of pressure signal, torch gas control valve and the strut buckling flip-over type Decompression valves that pressure transmitter exports, and sends the instruction of adjustment torch gas control valve and nitrogen gas control valve valve position according to these signals.
When torch gas pressure is lower than determinated low limit value, torch control valve will be in full off state, and now, air adverse current can not enter flare system, tempering can not occur.When torch gas pressure is between determinated low limit value and ceiling value, the torch gas pressure signal that torch gas control valve can send according to control system regulates aperture release portion torch gas, the torch gas of release can ensure certain flow velocity, can prevent air from entering flare system and tempering occurs.In case of emergency, when the pressure in torch gas house steward exceedes setting value, control system can send signal to torch gas control valve, is all opened by torch gas control valve, make torch gas can release smoothly to flare tip burning destroy by fire.
After after torch gas burning, the total overpressure of torch gas is reduced to setting value lower bound, torch gas control valve can be closed automatically.While torch gas control valve is closed, control system can make nitrogen gas control valve open, nitrogen can enter the downstream line of torch gas control valve and be purged to flare system by inflammable gas wherein, eliminates the possibility causing tempering due to inflammable gas residual in pipeline.
If torch gas control valve can not be opened because of fault, pressure in torch gas house steward continues due to the gathering of gas to raise, when torch gas pressure reaches the pressure set points of strut buckling flip-over type Decompression valves, strut buckling flip-over type Decompression valves can automatically be opened, thus torch gas can be released to flare tip burning destroy by fire.Strut buckling flip-over type Decompression valves is that torch gas is released and provided other one and heavily ensure, ensure that torch gas can be disposed to flare tip burning when needed and destroy by fire.
The valve position signal of strut buckling flip-over type Decompression valves can feed back to control system, and when strut buckling flip-over type Decompression valves is opened, control system can open nitrogen gas control valve, even if guarantee that, after torch gas finishing combustion, flare system also tempering can not occur.Nitrogen gas control valve is until after control system confirms that strut buckling flip-over type Decompression valves resets, can close.
The utility model is reasonable in design, technique is simple, equipment investment is few, and construction amount is little, and the design-build cycle is short, maintenance cost is low, take up an area space little, its safety relief being torch gas and backfireproof provide double shield, can meet the requirement of flare system for backfireproof facility, the backfireproof facilities such as alternative water sealed tank, are widely used in the flare system of the industry such as oil, chemical industry.
Accompanying drawing explanation
Fig. 1 is the flare system backfireproof facility adopting water sealed tank;
Fig. 2 is the schematic diagram that valve that the utility model relates to controls backfireproof system automatically;
Fig. 3 is exemplar schematic Fig. 1 that valve that the utility model relates to controls strut buckling flip-over type Decompression valves in backfireproof system automatically.Fig. 4 is exemplar schematic Fig. 2 that valve that the utility model relates to controls strut buckling flip-over type Decompression valves in backfireproof system automatically.
Embodiment
A kind of valve controls backfireproof system automatically, and it forms primarily of control system 1, pressure transmitter (and/or flowmeter) 2, strut buckling flip-over type Decompression valves 3, torch gas control valve 4 and nitrogen gas control valve 5.As shown in Figure 1, this system is installed on flare tip 6 upstream.
Wherein, pressure transmitter (and/or flowmeter) 2 is installed on torch gas house steward, and is positioned at the upstream of torch gas control valve 4.
Wherein, as the bypass of torch gas control valve 4, strut buckling flip-over type Decompression valves 3 and torch gas control valve 4 are installed in parallel.Strut buckling flip-over type Decompression valves 3 is a kind of by the power-actuated non-reclosing formula pressure relief device of inlet-pressure, and its decompression function system is realized by the strut buckling of elongate rod 10 and then the disengaging each other of triggering seal element.Common strut buckling flip-over type Decompression valves can be divided into several classes such as linear type, rotary and leading type.Below only for linear type strut buckling flip-over type Decompression valves, the principle of such valve is introduced.Flap 12 and valve seat 13 are Sealings of Decompression valves, and when flap 12 and valve seat 13 close contact, Decompression valves realizes sealing, and when flap 12 is separated with valve seat 13, Decompression valves realizes pressure release.Elongate rod 10 is key elements of control valve sealing and pressure release, and it is installed on valve body 7 and valve gap 8 is outside, and one end connects with inside elongate rod cage 9, and the other end connects with valve rod 11, by valve rod 11 to flap 12 loaded load.When flap 12 is more than or equal to the Buckling Load of elongate rod 10 by valve rod 11 thrust load be carried in elongate rod 10, can unstability be there is in elongate rod 10, its effective length can significantly diminish moment, its thrust acted on valve rod 11 can reduce suddenly, flap 12 can be separated instantaneously with valve seat 13, thus reaches the object of pressure release.After valve pressure release, without the need to dismantling pipeline and valve, can be resetted by valve rod 10 from valve body 7 and valve gap 8 outside, elongate rod 10 is changed after close contact by flap 12 and valve seat 13 again, and valve recovers sealing state.The sealing state of strut buckling flip-over type Decompression valves and pressure release state are as shown in Figure 3, Figure 4.
Wherein, nitrogen gas control valve 5 is installed on the arm of strut buckling flip-over type Decompression valves 3 and torch gas control valve 4 downstream line, and it controls nitrogen and enters torch gas house steward to purge house steward where necessary.
Wherein control system 1 receives the valve position signal of pressure (and/or flow) signal, torch gas control valve 4 and the strut buckling flip-over type Decompression valves 3 that pressure transmitter (and/or flowmeter) 2 exports, and sends the instruction of adjustment torch gas control valve (4) and nitrogen gas control valve (5) valve position according to these signals.
Wherein, torch gas control valve 4 can be stressed SC sigmal control, also can control by flux signal.Below only control torch gas control valve 4 for pressure signal, further describe embodiment of the present utility model.
The torch gas pressure signal that torch gas control valve 4 can send according to control system 1 adjusts its valve position.When torch gas pressure is lower than determinated low limit value, torch control valve 4 will be in full off state, and now, air adverse current can not enter flare system, tempering can not occur.When torch gas pressure is between determinated low limit value and ceiling value, the torch gas pressure signal that torch gas control valve 4 can send according to control system 1 regulates aperture release portion torch gas, the torch gas of release can ensure certain flow velocity, can prevent air from entering flare system and tempering occurs.In case of emergency, when the pressure in torch gas house steward exceedes setting value, control system 1 can send signal to torch gas control valve 4, is all opened by torch gas control valve 4, make torch gas can release smoothly to flare tip burning destroy by fire.
After after torch gas burning, the total overpressure of torch gas is reduced to setting value lower bound, torch gas control valve 4 can be closed automatically.While torch gas control valve 4 is closed, control system 1 can make nitrogen gas control valve 5 open, nitrogen can enter the downstream line of torch gas control valve 4 and be purged to flare system by inflammable gas wherein, eliminates the possibility causing tempering due to inflammable gas residual in pipeline.
If torch gas control valve 4 can not be opened because of fault, pressure in torch gas house steward continues due to the gathering of gas to raise, when torch gas pressure reaches the pressure set points of strut buckling flip-over type Decompression valves 3, strut buckling flip-over type Decompression valves 3 can automatically be opened, thus torch gas can be released to flare tip 6 burning destroy by fire.Strut buckling flip-over type Decompression valves 3 provides other one heavily ensure for torch gas is released, and ensure that torch gas can be disposed to flare tip 6 burning when needed and destroy by fire.
The valve position signal of strut buckling flip-over type Decompression valves 3 can feed back to control system 1, when strut buckling flip-over type Decompression valves 3 is opened, control system 1 can open nitrogen gas control valve 5, nitrogen is purged torch gas house steward, even if guarantee that, after torch gas finishing combustion, flare system also tempering can not occur.Nitrogen gas control valve 5 is until after control system 1 confirms that strut buckling flip-over type Decompression valves 3 resets, can close.
Strut buckling flip-over type Decompression valves 3 needs manual reset after opening, and its reset needs to consume elongate rod 10, opens by mistake open for preventing it, setting value corresponding when its pressure release setting pressure all should be opened higher than torch gas control valve 4.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (5)
1. a valve controls backfireproof system automatically, it forms primarily of control system (1), pressure transmitter (2), strut buckling flip-over type Decompression valves (3), torch gas control valve (4) and nitrogen gas control valve (5), it is characterized in that: pressure transmitter (2) is installed on torch gas house steward, and is positioned at the upstream of torch gas control valve (4); As the bypass of torch gas control valve (4), strut buckling flip-over type Decompression valves (3) and torch gas control valve (4) are installed in parallel; Nitrogen gas control valve (5) is installed on the arm of strut buckling flip-over type Decompression valves (3) and torch gas control valve (4) downstream line; Control system (1) receives the valve position signal of pressure signal, torch gas control valve (4) and the strut buckling flip-over type Decompression valves (3) that pressure transmitter (2) exports, and sends the instruction of adjustment torch gas control valve (4) and nitrogen gas control valve (5) valve position according to these signals.
2. a kind of valve according to claim 1 controls backfireproof system automatically, it is characterized in that strut buckling flip-over type Decompression valves (3) is that torch gas is released and provided other one and heavily ensure as bypass.
3. a kind of valve according to claim 1 controls backfireproof system automatically, it is characterized in that torch gas control valve (4) is with the SC sigmal control that is stressed; When torch gas pressure is lower than determinated low limit value, torch control valve (4) will be in full off state; When torch gas pressure is between determinated low limit value and ceiling value, the torch gas pressure signal that torch gas control valve (4) can send according to control system (1) regulates aperture release portion torch gas; When the pressure in torch gas house steward exceedes setting value, control system (1) can send signal to torch gas control valve (4), torch gas control valve (4) is all opened, make torch gas can release smoothly to flare tip burning destroy by fire.
4. a kind of valve according to claim 1 controls backfireproof system automatically, while it is characterized in that torch gas control valve (4) is closed, control system (1) can make nitrogen gas control valve (5) open, and nitrogen can enter the downstream line of torch gas control valve (4) and be purged to flare system by inflammable gas wherein.
5. a kind of valve according to claim 1 controls backfireproof system automatically, when it is characterized in that strut buckling flip-over type Decompression valves (3) is opened, control system (1) can open nitrogen gas control valve (5), and nitrogen is purged torch gas house steward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520454616.6U CN205118356U (en) | 2015-06-30 | 2015-06-30 | Valve automatic control anti -backfire system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520454616.6U CN205118356U (en) | 2015-06-30 | 2015-06-30 | Valve automatic control anti -backfire system |
Publications (1)
| Publication Number | Publication Date |
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| CN205118356U true CN205118356U (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520454616.6U Withdrawn - After Issue CN205118356U (en) | 2015-06-30 | 2015-06-30 | Valve automatic control anti -backfire system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224964A (en) * | 2016-08-04 | 2016-12-14 | 成都国光电子仪表有限责任公司 | A kind of gas well Automated condtrol pressure relief device |
| CN106247167A (en) * | 2016-08-04 | 2016-12-21 | 成都国光电子仪表有限责任公司 | A kind of gas station blowdown system |
| CN106247166A (en) * | 2016-08-04 | 2016-12-21 | 成都国光电子仪表有限责任公司 | Natural gas gas production factory pressure relief system |
| CN106247352A (en) * | 2016-08-04 | 2016-12-21 | 成都国光电子仪表有限责任公司 | Gas gathering station safety relief emptying system |
| CN106287701A (en) * | 2016-08-04 | 2017-01-04 | 成都国光电子仪表有限责任公司 | Gas well relief and blow-down system |
| CN106321915A (en) * | 2015-06-30 | 2017-01-11 | 江苏瑞朗博机械设备有限公司 | Automatic control anti-backfire system for valve |
-
2015
- 2015-06-30 CN CN201520454616.6U patent/CN205118356U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321915A (en) * | 2015-06-30 | 2017-01-11 | 江苏瑞朗博机械设备有限公司 | Automatic control anti-backfire system for valve |
| CN106321915B (en) * | 2015-06-30 | 2017-11-17 | 江苏瑞朗博机械设备有限公司 | A kind of valve automatically controls anti-backfire system |
| CN106224964A (en) * | 2016-08-04 | 2016-12-14 | 成都国光电子仪表有限责任公司 | A kind of gas well Automated condtrol pressure relief device |
| CN106247167A (en) * | 2016-08-04 | 2016-12-21 | 成都国光电子仪表有限责任公司 | A kind of gas station blowdown system |
| CN106247166A (en) * | 2016-08-04 | 2016-12-21 | 成都国光电子仪表有限责任公司 | Natural gas gas production factory pressure relief system |
| CN106247352A (en) * | 2016-08-04 | 2016-12-21 | 成都国光电子仪表有限责任公司 | Gas gathering station safety relief emptying system |
| CN106287701A (en) * | 2016-08-04 | 2017-01-04 | 成都国光电子仪表有限责任公司 | Gas well relief and blow-down system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160330 Effective date of abandoning: 20171117 |
|
| AV01 | Patent right actively abandoned |