CN104828423A - Method for avoiding arene storage tank gaseous-phase burning explosion and held pressure damage - Google Patents
Method for avoiding arene storage tank gaseous-phase burning explosion and held pressure damage Download PDFInfo
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- CN104828423A CN104828423A CN201510288346.0A CN201510288346A CN104828423A CN 104828423 A CN104828423 A CN 104828423A CN 201510288346 A CN201510288346 A CN 201510288346A CN 104828423 A CN104828423 A CN 104828423A
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- storage tank
- nitrogen
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- pressure
- pipeline
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a method for avoiding arene storage tank gaseous-phase burning explosion and held pressure damage. The method mainly solves the problems that in the prior art, the nitrogen consumption is large, and pumping shrinking is easily caused. According to the method for avoiding the arene storage tank gaseous-phase burning explosion and the held pressure damage, tail gas pipes on at least two storage tanks are connected with a total discharge pipe, an outlet of the total discharge pipe is connected with a buffer tank, an oxygen content detector is arranged on a gaseous-phase area of the buffer tank, a pipe for supplementing nitrogen and an adjusting valve are arranged on the gaseous-phase area, and the adjusting valve on the pipe for supplementing the nitrogen is adjusted according to data detected by the oxygen content detector; the buffer tank is connected with a safety water seal through a pipe, a water column pressure scope set for the safety water seal is larger than 20% of a working pressure scope of a breather valve. According to the technical scheme, the above problems are better solved, and the method can be used for avoiding the arene storage tank gaseous-phase burning explosion.
Description
Technical field
The present invention relates to and a kind ofly avoid aromatic hydrocarbons storage tank gas phase to fire and by the damaged method that builds the pressure.
Background technology
Aromatic hydrocarbons storage tank 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 nitrogen is supplemented from storage tank breathing valve; along with the operation of storage tank; nitrogen ceaselessly fills into and breathes out, and makes gas phase in tank keep anaerobic state.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.Aromatic hydrocarbons storage tank gas phase is often in blast atmosphere, and in order to prevent aromatic hydrocarbons 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, frequent employing storage tank gas phase UNICOM, operation scheme expansion tank being set, expansion tank installing additional breathing valve, unifies to breathe out or suck air, 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.
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.
The present invention solves this problem targetedly.
Summary of the invention
Technical matters to be solved by this invention is that in prior art, nitrogen consumption is taken out flat problem more greatly, easily, provide a kind of newly avoid aromatic hydrocarbons storage tank gas phase to fire and by the damaged method that builds the pressure.During the method is used for preventing aromatic hydrocarbons storage tank gas phase from firing, have nitrogen consumption less, not easily taken out flat advantage.
For solving the problem, the technical solution used in the present invention is as follows: a kind ofly avoid aromatic hydrocarbons storage tank gas phase to fire and by the damaged method that builds the pressure, exhaust pipe at least two storage tanks is connected with total outfall pipeline, total outfall pipeline outlet is connected with expansion tank, at expansion tank top, breathing valve is set, the vapor phase areas of expansion tank arranges oxygen content detector, and the pipeline of supplementary nitrogen is set in described vapor phase areas and regulates the valves, regulate according to the detection data of oxygen content detector and supplement regulating the valves on nitrogen pipeline, when gas phase oxygen volume content in expansion tank higher than 9.0% time, regulate the valves described in opening and pass into nitrogen, when gas phase oxygen volume content in expansion tank lower than 9.0% time, the stopping that regulating the valves described in closedown passes into nitrogen, ensures that oxygen volume content in the gas phase of each storage tank is lower than 9.0%, wherein, described storage tank does not arrange breathing valve, and expansion tank is connected with Safety water seal by pipeline, and the water column pressure scope that Safety water seal is arranged is greater than more than 20% of breathing valve working pressure range.
In technique scheme, preferably, regulating the valves as pneumatic valve on described supplementary nitrogen pipeline.
In technique scheme, preferably, described oxygen content detector is connected with regulating the valves by data line.
In technique scheme, preferably, described aromatic hydrocarbons is benzene,toluene,xylene, o-xylene, m-xylene, paraxylene, mixed benzene, ethylbenzene, more than C9 heavy aromatics.
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.On expansion tank, increase Safety water seal, when breathing valve breaks down, can breathe out by breaking through Safety water seal or suck air in tank field, achieve good technique effect simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the method for the invention.
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 Safety water seal.
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
Detailed description of the invention
[embodiment 1]
A kind ofly toluene tank gas phase is avoided to fire and by the damaged method that builds the pressure, the device adopted 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.Wherein, expansion tank (1) top is connected with Safety water seal (12) by pipeline.
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 aromatic hydrocarbons storage tank gas phase from firing.Simultaneously, the water column pressure scope that Safety water seal on expansion tank is arranged should 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.When greatly saving nitrogen, preventing aromatic hydrocarbons storage tank gas phase from firing, preventing storage tank from being taken out the flat or breakage that builds the pressure.
Adopting device of the present invention, 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.Meanwhile, storage tank is prevented to be taken out the flat or breakage that builds the pressure.
[embodiment 2]
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.Meanwhile, storage tank is prevented to be taken out the flat or breakage that builds the pressure.
[embodiment 3]
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.Meanwhile, storage tank is prevented to be taken out the flat or breakage that builds the pressure.
Claims (4)
1. avoid aromatic hydrocarbons storage tank gas phase to fire and by the damaged method that builds the pressure for one kind, exhaust pipe at least two storage tanks is connected with total outfall pipeline, total outfall pipeline outlet is connected with expansion tank, at expansion tank top, breathing valve is set, the vapor phase areas of expansion tank arranges oxygen content detector, and the pipeline of supplementary nitrogen is set in described vapor phase areas and regulates the valves, regulate according to the detection data of oxygen content detector and supplement regulating the valves on nitrogen pipeline, when gas phase oxygen volume content in expansion tank higher than 9.0% time, regulate the valves described in opening and pass into nitrogen, when gas phase oxygen volume content in expansion tank lower than 9.0% time, the stopping that regulating the valves described in closedown passes into nitrogen, ensures that oxygen volume content in the gas phase of each storage tank is lower than 9.0%, wherein, described storage tank does not arrange breathing valve, and expansion tank is connected with Safety water seal by pipeline, and the water column pressure scope that Safety water seal is arranged is greater than more than 20% of breathing valve working pressure range.
2. avoid aromatic hydrocarbons storage tank gas phase to fire according to claim 1 and by the damaged method that builds the pressure, it is characterized in that regulating the valves as pneumatic valve on described supplementary nitrogen pipeline.
3. avoid aromatic hydrocarbons storage tank gas phase to fire according to claim 1 and by the damaged method that builds the pressure, it is characterized in that described oxygen content detector is connected with regulating the valves by data line.
4. avoid aromatic hydrocarbons storage tank gas phase to fire according to claim 1 and by the damaged method that builds the pressure, it is characterized in that described aromatic hydrocarbons is benzene,toluene,xylene, o-xylene, m-xylene, paraxylene, mixed benzene, ethylbenzene, more than C9 heavy aromatics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510288346.0A CN104828423A (en) | 2015-05-29 | 2015-05-29 | Method for avoiding arene storage tank gaseous-phase burning explosion and held pressure damage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510288346.0A CN104828423A (en) | 2015-05-29 | 2015-05-29 | Method for avoiding arene storage tank gaseous-phase burning explosion and held pressure damage |
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| CN104828423A true CN104828423A (en) | 2015-08-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2388651C (en) * | 1999-10-26 | 2008-10-07 | Csx Transportation, Inc. | Method and apparatus for locomotive fuel tank repair |
| CN101767697A (en) * | 2009-12-31 | 2010-07-07 | 杜扬 | Intrinsically safe inerting protection method and device for oil storage tank |
| CN201660248U (en) * | 2009-12-30 | 2010-12-01 | 四川威特龙消防设备有限公司 | Intrinsic safety inerting protection device for oil reservoir |
| CN103723396A (en) * | 2013-10-18 | 2014-04-16 | 中国石油化工股份有限公司 | Storage tank area integrated breathing apparatus |
| CN104370000A (en) * | 2014-11-04 | 2015-02-25 | 中国石油化工股份有限公司 | Safe and environment-friendly method for protecting storage tanks |
-
2015
- 2015-05-29 CN CN201510288346.0A patent/CN104828423A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2388651C (en) * | 1999-10-26 | 2008-10-07 | Csx Transportation, Inc. | Method and apparatus for locomotive fuel tank repair |
| CN201660248U (en) * | 2009-12-30 | 2010-12-01 | 四川威特龙消防设备有限公司 | Intrinsic safety inerting protection device for oil reservoir |
| CN101767697A (en) * | 2009-12-31 | 2010-07-07 | 杜扬 | Intrinsically safe inerting protection method and device for oil storage tank |
| CN103723396A (en) * | 2013-10-18 | 2014-04-16 | 中国石油化工股份有限公司 | Storage tank area integrated breathing apparatus |
| CN104370000A (en) * | 2014-11-04 | 2015-02-25 | 中国石油化工股份有限公司 | Safe and environment-friendly method for protecting storage tanks |
Non-Patent Citations (1)
| Title |
|---|
| 孟庭宇等: "氮封内浮顶石脑油储罐气相空间气体浓度分布特性研究", 《化学工程与装备》 * |
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Application publication date: 20150812 |
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