CN204726957U - Storage Tanks Combustible Liquid fender guard - Google Patents
Storage Tanks Combustible Liquid fender guard Download PDFInfo
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- CN204726957U CN204726957U CN201520362761.1U CN201520362761U CN204726957U CN 204726957 U CN204726957 U CN 204726957U CN 201520362761 U CN201520362761 U CN 201520362761U CN 204726957 U CN204726957 U CN 204726957U
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Abstract
The utility model relates to a kind of Storage Tanks Combustible Liquid fender guard, mainly solve nitrogen consumption in prior art comparatively large, pollute and more greatly, easily taken out flat, that safety is poor problem.The utility model is by adopting a kind of Storage Tanks Combustible Liquid fender guard, storage tank (9) is all connected with total outfall pipeline (10) by exhaust pipe, total outfall pipeline (10) outlet is connected with expansion tank (1) top, oxygen content detector (4) is arranged on expansion tank (1), supplement nitrogen pipeline (5) to be connected with expansion tank (1), regulate the valves (3) be arranged on supplementary nitrogen pipeline (5), at expansion tank (1) top, breathing valve (2) is set, offgas outlet on breathing valve (2) is connected with device for recovering oil and gas (12) by pipeline, exhaust pipe on storage tank (9) is provided with flame trap (13), the technical scheme that expansion tank (1) top is connected with Safety water seal (14) solves the problems referred to above preferably, can be used in Storage Tanks Combustible Liquid protection.
Description
Technical field
The utility model relates to a kind of Storage Tanks Combustible Liquid fender guard.
Background technology
Combustible liquid; as oil product, alkane, organic oxygen compound etc.; Storage Tanks Combustible Liquid gas phase is often in blast atmosphere; explode to prevent Storage Tanks Combustible Liquid gas phase; at present the most conventional most actv. way is exactly the method adopting gas phase nitrogen protection, constantly supplements nitrogen, along with the operation of storage tank from storage tank breathing valve; nitrogen ceaselessly fills into and breathes out, and makes gas phase in tank keep anaerobic state.Oil product storage tank capacity conventional is at present 5000-10000 cubic meter, and therefore, adopt this kind of method comparatively large to the demand of nitrogen, the enterprise operating cost not plentiful to nitrogen is higher, by investigation, and the cost about 1 yuan of 1 cubic meter nitrogen in refinery.Therefore conventional approach will cause a large amount of nitrogen wastes at present, increase enterprise operation cost.Oil product storage tank gas phase is often in blast atmosphere, and in order to prevent oil product storage tank gas phase from exploding, most actv. way is exactly the method adopting gas phase nitrogen protection, supplements nitrogen from storage tank breathing valve, and along with storage tank runs, nitrogen ceaselessly fills into and breathes out.This operation scheme is for the operation of whole tank field, and nitrogen use amount is huge, and the nitrogen of exhalation contains saturated organic volatile, and this will cause a large amount of nitrogen wastes, and increase enterprise operation cost, the tail gas simultaneously containing organic volatile is by contaminated environment.And once breathing valve et out of order, this runs causing the storage tank of whole tank field under the state of superpressure or negative pressure, very easily causes storage tank to be taken out the flat or breakage that builds the pressure.Once presence of fire, this certainly will increase the risk of flame propagation, fire spread.
CN201410613961 relates to a kind of method protecting storage tank safety and environmental protection, by adopting a kind of method protecting storage tank safety and environmental protection, the gas that liquid in storage tank self produces is passed through gas main, appendix enters compressor, gas is stored in expansion tank by compressor pressurizes, as a part for positive pressure protection gas, when the gas stored in expansion tank does not meet the positive pressure protection of each storage tank, the nitrogen from nitrogen inlet pipeline is used to supplement, when expansion tank internal pressure exceedes design pressure, torch or burning is sent by reduce internal heat torch or incinerator pipeline by excessive gas.CN201320356393 relates to a kind of nitrogen pressure control system for chemical drum, disclose a kind of nitrogen pressure control system for chemical drum, described system comprises the minute-pressure type sensor be arranged in storage tank, be arranged on the gulp valve that described storage tank upper end is connected with described storage tank, blow off valve, described gulp valve and check valve, filter, blowdown valve, pressure regulating valve is connected in series, described pressure regulating valve is connected with nitrogen pot, described minute-pressure type sensor according to the pressure in storage tank by signal transmission to PLC, the closure or openness of described PLC gulp valve and blow off valve according to received signal control.CN201120095334 relates to a kind of nitrogen protection device of atmospheric storage tank; comprise atmospheric storage tank; also comprise nitrogen storage tank and nitrogen sealed tube; atmospheric storage tank top is provided with pressure sensor; this pressure sensor is connected with the first electromagnetic valve and the second electromagnetic valve by controller, ensures the basicly stable of nitrogen in atmospheric storage tank.
Above-mentioned patent monitors nitrogen content by pressure sensor, and then control tonifying Qi and the exhaust of nitrogen, and pressure is maintained in the scope of setting.But whether storage tank is in gas phase blast atmosphere in fact only to rely on pressure accurately to ensure, high to the sealing requirements of storage tank itself, leaks, or for there is the storage tank of breathing valve, then there is certain potential safety hazard if occur.And only control to a certain extent, decrease nitrogen use level, still need to consume a large amount of pure nitrogen gas.And the unresolved pollution of above-mentioned patent more greatly, is easily taken out flat, that safety is poor problem.
The utility model solves this problem targetedly.
Utility model content
Technical problem to be solved in the utility model be in prior art nitrogen consumption comparatively large, pollute and more greatly, easily taken out flat, that safety is poor problem, a kind of new Storage Tanks Combustible Liquid fender guard is provided.This device is used in Storage Tanks Combustible Liquid protection, has that nitrogen consumption is less, less pollution, is not easily taken out flat, the good advantage of safety.
For solving the problem, the technical solution adopted in the utility model is as follows: a kind of Storage Tanks Combustible Liquid fender guard, comprise at least two storage tanks (9), expansion tank (1), breathing valve (2), oxygen content detector (4), supplement nitrogen pipeline (5), regulate the valves (3), device for recovering oil and gas (12), flame trap (13) and Safety water seal (14), the gas-phase space of described at least two storage tanks (9) is all connected with total outfall pipeline (10) by exhaust pipe, total outfall pipeline (10) outlet is connected with expansion tank (1) top, it is characterized in that oxygen content detector (4) is arranged on the gas-phase space of expansion tank (1), supplement nitrogen pipeline (5) to be connected with the gas-phase space of expansion tank (1), regulate the valves (3) be arranged on supplementary nitrogen pipeline (5), oxygen content detector (4) is connected with regulate the valves (3) by data line, wherein, at expansion tank (1) top, breathing valve (2) is set, the breathing valve (2) at expansion tank (1) top is provided with air intake (6) and offgas outlet, described offgas outlet is connected with device for recovering oil and gas (12) by pipeline, and device for recovering oil and gas (12) top is provided with exhaust emissions pipeline (7), exhaust pipe on described storage tank (9) is provided with flame trap (13), and described expansion tank (1) top is connected with Safety water seal (14) by pipeline.
In technique scheme, preferably, regulate the valves (3) on described supplementary nitrogen pipeline (5) are for pneumatic valve.
In technique scheme, preferably, described storage tank (9) top does not arrange breathing valve.
In the utility model, the water column pressure scope that Safety water seal on expansion tank is arranged should higher than breathing valve working pressure range more than 20%, when breathing valve normally works, Safety water seal is guaranteed to close effectively, when breathing valve breaks down, can breathe out by breaking through Safety water seal or suck air in tank field, prevent storage tank from running under superpressure or negative pressure state.
Adopt device of the present utility model, in the operational process of tank area, breathing valve cancelled by each storage tank, arrange exhaust pipe to be connected with total outfall pipeline, in total outfall pipeline outlet, expansion tank is set, expansion tank is arranged breathing valve, the nitrogen of band control cock makes up line, oxygen content detector, breathing valve still normally sucks exhalation air.The nitrogen pipeline by-pass valve control just passing into expansion tank detects data according to oxygen content in expansion tank and regulates.When saving nitrogen, prevent Storage Tanks Combustible Liquid gas phase from firing.
This patent uses oxygen content detector, fires feature according to combustible liquid, adopts part nitrogen to mix with air, by accurately controlling gas phase oxygen volume content lower than setting value, just can reach the object preventing gas phase from firing, accomplishing essential safety.The storage tank exhaust emissions pipeline of tank field is coupled together simultaneously, eventually pass through an outlet uniform effluent, because each storage tank respiratory rate is different, can balance mutually between each storage tank gas phase.This will greatly reduce the use amount of nitrogen, reduce the discharge of tail gas, reach and prevent tank field from firing, the object of emissions reduction.The storage tank exhaust emissions pipeline of tank field is coupled together simultaneously, eventually pass through an outlet uniform effluent with device for recovering oil and gas, because each storage tank respiratory rate is different, can balance mutually between each storage tank gas phase, thus reduce evaporative emissions.Meanwhile, the exhaust pipe of storage tank arranges flame trap, effectively prevent fire-propagation.Expansion tank is connected with Safety water seal, avoids storage tank and is taken out flat danger, achieve good technique effect.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of device described in the utility model.
1 is expansion tank; 2 is breathing valve; 3 for regulating the valves; 4 is oxygen content detector; 5 for supplementing nitrogen pipeline; 6 is air intake; 7 is the exhaust emissions pipeline on device for recovering oil and gas; 8 is data line; 9 is storage tank; 10 is total outfall pipeline; 11 is storage tank exhaust emissions pipeline; 12 is device for recovering oil and gas; 13 is flame trap; 14 is Safety water seal.
Below by embodiment, the utility model is further elaborated, but is not limited only to the present embodiment.
Detailed description of the invention
[embodiment 1]
A kind of Storage Tanks Combustible Liquid fender guard; for oil product storage tank; described oil product comprises gasoline, kerosene, diesel oil, sump oil, coal tar naphtha, solvent naphtha, crude oil etc.; described device comprises two storage tanks (9), expansion tank (1), breathing valve (2), oxygen content detector (4), supplementary nitrogen pipeline (5), regulate the valves (3), and storage tank (9) top does not arrange breathing valve.The gas-phase space of two storage tanks (9) is all connected with total outfall pipeline (10) by exhaust pipe, total outfall pipeline (10) outlet is connected with expansion tank (1) top, breathing valve (2) one end at expansion tank (1) top is connected with the gas-phase space of expansion tank (1), oxygen content detector (4) is arranged on the gas-phase space of expansion tank (1), supplement nitrogen pipeline (5) to be connected with the gas-phase space of expansion tank (1), regulate the valves (3) be arranged on supplementary nitrogen pipeline (5), oxygen content detector (4) is connected with regulate the valves (3) by data line.Wherein, described storage tank does not arrange breathing valve, at expansion tank (1) top, breathing valve (2) is set, the breathing valve (2) at expansion tank (1) top is provided with air intake (6) and offgas outlet, described offgas outlet is connected with device for recovering oil and gas (12) by pipeline, and device for recovering oil and gas (12) top is provided with exhaust emissions pipeline (7).The exhaust pipe of each storage tank (9) is provided with flame trap (13), and the top of expansion tank (1) is connected with Safety water seal (14) by pipeline.The water column pressure scope that Safety water seal on expansion tank is arranged is higher than breathing valve working pressure range 20%, when breathing valve normally works, Safety water seal is guaranteed to close effectively, when breathing valve breaks down, can breathe out by breaking through Safety water seal or suck air in tank field, prevent storage tank from running under superpressure or negative pressure state.
In storage tank (9) operational process, the breathing valve (2) on expansion tank (1), according to discharging and feed needs, still normally to suck, air of breathing out.Just oxygen content detector (4) is set in expansion tank (1) gas phase, detects the change of gas phase oxygen content; Arrange supplementary nitrogen pipeline (5) at expansion tank top, this pipeline installs pneumatic adjusting valve door (3) additional, and this by-pass valve control detects data according to oxygen content in tank and regulates.When gas phase oxygen content in expansion tank higher than 9.0% time, automatically open valve and pass into nitrogen, until in expansion tank gas phase oxygen volume content lower than 9.0%; When gas phase oxygen volume content lower than 9.0% time, automatic-closing valve stop pass into nitrogen.By above control loop, ensure that the oxygen volume content of expansion tank gas phase is lower than 9.0%.When saving nitrogen, prevent oil product storage tank gas phase from firing.Meanwhile, the offgas outlet of the breathing valve (2) on expansion tank is connected with device for recovering oil and gas (12) by pipeline, reclaims, decrease pollutant emission to volatile matter.
Adopting device of the present utility model, comparing with using nitrogen protection storage tank completely, at least can save the nitrogen of 71.5%, and the safe effect reached is completely the same.If use pressure sensor to carry out the tonifying Qi of Monitoring and Controlling nitrogen compared with the situation of exhaust with other simultaneously, not only can save nitrogen, safety also improves greatly.Can reduce by the volatile matter volatilization of 95% simultaneously, and can fire-propagation be avoided, place building the pressure or being taken out flat of storage tank.
[embodiment 2]
According to the condition described in embodiment 1, be that described alkane comprises pentane, hexane, cyclohexane, pentane wet goods by described application of installation in alkane storage tank.When gas phase oxygen content in expansion tank higher than 9.6% time, automatically open valve and pass into nitrogen, until in expansion tank gas phase oxygen volume content lower than 9.6%; When gas phase oxygen volume content lower than 9.6% time, automatic-closing valve stop pass into nitrogen.By above control loop, ensure that the oxygen volume content of storage tank gas phase is lower than 9.6%.When saving nitrogen, prevent alkane storage tank gas phase from firing.
Adopting device of the present utility model, comparing with using nitrogen protection storage tank completely, at least can save the nitrogen of 72.9%, and the safe effect reached is completely the same.Can fire-propagation be avoided simultaneously, place building the pressure or being taken out flat of storage tank.
[embodiment 3]
According to the condition described in embodiment 1, be that described organic acid comprises formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, isooctyl acid etc. by described application of installation in organic acid storage tank.When gas phase oxygen content in expansion tank higher than 5.1% time, automatically open valve and pass into nitrogen, until in expansion tank gas phase oxygen volume content lower than 5.1%; When gas phase oxygen volume content lower than 5.1% time, automatic-closing valve stop pass into nitrogen.By above control loop, ensure that the oxygen volume content of storage tank gas phase is lower than 5.1%.When saving nitrogen, prevent organic acid storage tank gas phase from firing.
Adopting device of the present utility model, comparing with using nitrogen protection storage tank completely, at least can save the nitrogen of 62.2%, and the safe effect reached is completely the same.Avoid fire-propagation simultaneously, place building the pressure or being taken out flat of storage tank.
[embodiment 4]
According to the condition described in embodiment 1, be that described organic aldehyde comprises formaldehyde, acetaldehyde, propionic aldehyde, butyraldehyde etc. by described application of installation in organic aldehyde storage tank.When gas phase oxygen content in expansion tank higher than 6.7% time, automatically open valve and pass into nitrogen, until in tank gas phase oxygen volume content lower than 6.7%; When gas phase oxygen volume content lower than 6.7% time, automatic-closing valve stop pass into nitrogen.By above control loop, ensure that the oxygen volume content of storage tank gas phase is lower than 6.7%.When saving nitrogen, prevent oil product storage tank gas phase from firing.
Adopting device of the present utility model, comparing with using nitrogen protection storage tank completely, at least can save the nitrogen of 66%, and the safe effect reached is completely the same.Can fire-propagation be avoided simultaneously, place building the pressure or being taken out flat of storage tank.
[embodiment 5]
According to the condition described in embodiment 1, just storage tank quantity is 3, at least can save the nitrogen of 81%, and the safe effect reached is completely the same.Can fire-propagation be avoided simultaneously, place building the pressure or being taken out flat of storage tank.
[embodiment 6]
According to the condition described in embodiment 1, just storage tank quantity is 4, at least can save the nitrogen of 85.8%, and the safe effect reached is completely the same.Can fire-propagation be avoided simultaneously, place building the pressure or being taken out flat of storage tank.
Claims (3)
1. a Storage Tanks Combustible Liquid fender guard, comprise at least two storage tanks (9), expansion tank (1), breathing valve (2), oxygen content detector (4), supplement nitrogen pipeline (5), regulate the valves (3), device for recovering oil and gas (12), flame trap (13) and Safety water seal (14), the gas-phase space of described at least two storage tanks (9) is all connected with total outfall pipeline (10) by exhaust pipe, total outfall pipeline (10) outlet is connected with expansion tank (1) top, it is characterized in that oxygen content detector (4) is arranged on the gas-phase space of expansion tank (1), supplement nitrogen pipeline (5) to be connected with the gas-phase space of expansion tank (1), regulate the valves (3) be arranged on supplementary nitrogen pipeline (5), oxygen content detector (4) is connected with regulate the valves (3) by data line, wherein, at expansion tank (1) top, breathing valve (2) is set, the breathing valve (2) at expansion tank (1) top is provided with air intake (6) and offgas outlet, described offgas outlet is connected with device for recovering oil and gas (12) by pipeline, and device for recovering oil and gas (12) top is provided with exhaust emissions pipeline (7), exhaust pipe on described storage tank (9) is provided with flame trap (13), and described expansion tank (1) top is connected with Safety water seal (14) by pipeline.
2. Storage Tanks Combustible Liquid fender guard according to claim 1, is characterized in that regulate the valves (3) on described supplementary nitrogen pipeline (5) are for pneumatic valve.
3. Storage Tanks Combustible Liquid fender guard according to claim 1, is characterized in that described storage tank (9) top does not arrange breathing valve.
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| CN201520362761.1U CN204726957U (en) | 2015-05-29 | 2015-05-29 | Storage Tanks Combustible Liquid fender guard |
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| CN201520362761.1U CN204726957U (en) | 2015-05-29 | 2015-05-29 | Storage Tanks Combustible Liquid fender guard |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035577A (en) * | 2015-05-29 | 2015-11-11 | 中国石油化工股份有限公司 | Protection device and method for combustible-liquid storage tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105035577A (en) * | 2015-05-29 | 2015-11-11 | 中国石油化工股份有限公司 | Protection device and method for combustible-liquid storage tank |
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