CN204726963U - Prevent the device that combustible liquid storage tank region fire gas phase is propagated - Google Patents
Prevent the device that combustible liquid storage tank region fire gas phase is propagated Download PDFInfo
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- CN204726963U CN204726963U CN201520363921.4U CN201520363921U CN204726963U CN 204726963 U CN204726963 U CN 204726963U CN 201520363921 U CN201520363921 U CN 201520363921U CN 204726963 U CN204726963 U CN 204726963U
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Abstract
The utility model relates to a kind of device preventing combustible liquid storage tank region fire gas phase from propagating, and mainly solves the problem that in prior art, nitrogen consumption is comparatively large, safety is poor.The utility model is by adopting a kind of device preventing combustible liquid storage tank region fire gas phase from propagating, the gas-phase space of described at least two storage tanks (9) is all connected with total outfall pipeline (10) by exhaust emissions pipeline, total outfall pipeline (10) outlet is connected with expansion tank (1) top, wherein 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, the technical scheme that the exhaust pipe on described each storage tank is provided with flame trap (12) solves the problems referred to above preferably, in can be used for preventing combustible liquid storage tank region fire gas phase from propagating.
Description
Technical field
The utility model relates to a kind of device preventing combustible liquid storage tank region fire gas phase from propagating.
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 this will cause a large amount of nitrogen wastes.In order to save nitrogen, often adopt the operation scheme of storage tank gas phase UNICOM, 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 there is the poor problem of safety.And above-mentioned patent adopts the operation scheme of storage tank gas phase UNICOM, once presence of fire, certainly will there is the risk of flame propagation, fire spread.
The utility model solves the problems referred to above targetedly.
Utility model content
Technical problem to be solved in the utility model is the problem that in prior art, nitrogen consumption is comparatively large, safety is poor, provides a kind of device preventing combustible liquid storage tank region fire gas phase from propagating newly.During this device is used for preventing oil product storage tank district fire gas phase from propagating, and there is the advantage that nitrogen consumption is less, safety is higher.
For solving the problem, the technical solution adopted in the utility model is as follows: a kind of device preventing combustible liquid storage tank region fire gas phase from propagating, 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), the gas-phase space of described at least two storage tanks (9) is all connected with total outfall pipeline (10) by exhaust emissions pipeline, total outfall pipeline (10) outlet is connected with expansion tank (1) top, breathing valve (2) one end is connected with the gas-phase space of expansion tank (1), breathing valve (2) is provided with air intake (6) and offgas outlet (7), 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, the exhaust pipe on described each storage tank is provided with flame trap (12).
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.
The storage tank exhaust emissions pipeline of tank field couples together by this patent, eventually pass through an outlet uniform effluent, because each storage tank respiratory rate is different, can balance mutually between each storage tank gas phase, use oxygen content detector, fire feature according to oil product, part nitrogen is adopted to mix with air, by accurately controlling gas phase oxygen volume content lower than 9.0%, just can reach the object preventing gas phase from firing, accomplishing essential safety.This, by under the prerequisite of protection storage tank essential safety, greatly reduces the use amount of nitrogen.Meanwhile, each storage tank exhaust pipe installs flame trap additional, prevents flame transmission, achieve good technique effect.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of method 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 offgas outlet; 8 is data line; 9 is storage tank; 10 is total outfall pipeline; 11 is storage tank exhaust emissions pipeline; 12 is flame trap.
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]
Avoid the device that Storage Tanks Combustible Liquid gas phase fires, 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), supplement nitrogen pipeline (5), regulate the valves (3), the gas-phase space of two storage tanks (9) is all connected with total outfall pipeline (10) by exhaust emissions pipeline, total outfall pipeline (10) outlet is connected with expansion tank (1) top, breathing valve (2) one end is connected with the gas-phase space of expansion tank (1), breathing valve (2) is provided with air intake (6) and offgas outlet (7), 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.Exhaust pipe on described each storage tank is provided with flame trap (12).
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 and fire-propagation.
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.
[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 and fire-propagation.
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.
[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 and fire-propagation.
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.
[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 and fire-propagation.
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.
[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.
[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.
Claims (3)
1. the device preventing combustible liquid storage tank region fire gas phase from propagating, 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), the gas-phase space of described at least two storage tanks (9) is all connected with total outfall pipeline (10) by exhaust emissions pipeline, total outfall pipeline (10) outlet is connected with expansion tank (1) top, breathing valve (2) one end is connected with the gas-phase space of expansion tank (1), breathing valve (2) is provided with air intake (6) and offgas outlet (7), 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, the exhaust pipe on described each storage tank is provided with flame trap (12).
2. the device preventing combustible liquid storage tank region fire gas phase from propagating according to claim 1, is characterized in that regulate the valves (3) on described supplementary nitrogen pipeline (5) are for pneumatic valve.
3. the device preventing combustible liquid storage tank region fire gas phase from propagating according to claim 1, is characterized in that described storage tank (9) top does not arrange breathing valve.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104973359A (en) * | 2015-05-29 | 2015-10-14 | 中国石油化工股份有限公司 | Process device and method for preventing fire gas phase propagation of combustible liquid storage tank region |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104973359A (en) * | 2015-05-29 | 2015-10-14 | 中国石油化工股份有限公司 | Process device and method for preventing fire gas phase propagation of combustible liquid storage tank region |
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