CN105059774A - P-xylene storage system and process based on inert gas protection - Google Patents
P-xylene storage system and process based on inert gas protection Download PDFInfo
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- CN105059774A CN105059774A CN201510413997.8A CN201510413997A CN105059774A CN 105059774 A CN105059774 A CN 105059774A CN 201510413997 A CN201510413997 A CN 201510413997A CN 105059774 A CN105059774 A CN 105059774A
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Abstract
The invention discloses a p-xylene storage system based on inert gas protection. The system comprises a pressure container for storing inert gas, a p-xylene storage tank for storing liquid-state p-xylene, a buffer tank and a condenser, wherein the pressure container is respectively connected with the p-xylene storage tank and the buffer tank through gas guide pipelines; air compressors are respectively arranged on the gas guide pipeline for connecting the pressure container with the p-xylene storage tank and the gas guide pipeline for connecting the pressure container with the buffer tank; the p-xylene storage tank passes through a centrifugal pump and is connected to the upper part of the condenser through a gas guide pipeline; the lower part of the condenser is connected with the buffer tank; the buffer tank is connected with the p-xylene storage tank through a gas guide pipeline and a liquid guide pipeline; and an air compressor is arranged on the gas guide pipeline for connecting the buffer tank with the p-xylene storage tank. The system realizes the storage of p-xylene. The system can solve the unsafety problem generated due to long-time storage of p-xylene by the storage tank in the prior art, so that the potential safety hazard of gas leakage of the storage tank can be timely discovered through detecting the inert gas in the environment.
Description
Technical field
The invention belongs to technical field of petrochemical industry, be specifically related to a kind of paraxylene stocking system based on inert gas shielding, the invention still further relates to a kind of paraxylene storage process based on inert gas shielding.
Background technology
Paraxylene (p-xylene), also known as Isosorbide-5-Nitrae-dimethylbenzene, is a kind of derivant of benzene, can be abbreviated as " PX ".Paraxylene is one of xylene isomer, is colourless liquid, slabbing or column crystallization body during low temperature.Its polymerizate is Parylene, the main raw material being used as production poly-ester fibres and resin, coating, dyestuff and agricultural chemicals.
Paraxylene all has spread effect to eye and the upper respiratory tract, and can make skin degreasing.Suck the paraxylene gas of higher concentration in a short time, can go out to lose face and the obvious irritation of the upper respiratory tract, time serious, can pulmonary edema be caused; Long Term Contact may cause kidney, hepatic injury.Therefore, paraxylene carried out storing just seem particularly important for long-term and safety.In prior art, usual use storage tank stores paraxylene, paraxylene is deposited with liquid mode in storage tank, but there will be paraxylene gas along with depositing more than its liquid level, therefore, if when storage tank exists gas leak, paraxylene gas can leak, not only damage to personnel, also can deposit simultaneously and blast.
Summary of the invention
The object of the present invention is to provide a kind of paraxylene stocking system based on inert gas shielding, solve in prior art the unsafe problems utilizing storage tank long term storage paraxylene to exist.
Another object of the present invention is to provide the paraxylene storage process based on inert gas shielding.
The technical solution adopted in the present invention is, a kind of paraxylene stocking system based on inert gas shielding, comprises the pressure container, P-xylene Storage Tank, expansion tank and the condenser for storing liquid paraxylene that store unreactable gas; Pressure container is connected with P-xylene Storage Tank and expansion tank respectively by gas-guide pipeline, pressure container is being provided with Air compressor with P-xylene Storage Tank with cushioning on tank connected gas-guide pipeline, described P-xylene Storage Tank is connected with the top of condenser through centrifugal pump by gas-guide pipeline, the bottom of condenser is connected with expansion tank, described expansion tank is also connected with P-xylene Storage Tank with liquid guide pipeline respectively by gas-guide pipeline, and the gas-guide pipeline that expansion tank is connected with P-xylene Storage Tank is provided with Air compressor.
Feature of the present invention is also, said system also comprises the unreactable gas detector be placed in P-xylene Storage Tank external environment.
Feature of the present invention is also, expansion tank is also provided with melt cinder discharge side, and melt cinder discharge side is connected with melt cinder accumulator tank by pipeline.
Another technical scheme of the present invention is, a kind of paraxylene storage process based on inert gas shielding, carries out in the following manner:
First, the above-mentioned paraxylene stocking system based on inert gas shielding is provided; Unreactable gas in pressure container to be passed into the top in P-xylene Storage Tank through gas-guide pipeline by Air compressor; Miscellaneous gas more than liquid level in P-xylene Storage Tank is extracted out by centrifugal pump by timing, miscellaneous gas after extraction is introduced into condenser through gas-guide pipeline and carries out condensation, then the liquid paraxylene obtained after condensation and without liquefaction unreactable gas enter into expansion tank again, expansion tank liquid paraxylene is out back in P-xylene Storage Tank through liquid guide pipeline again, through condenser unreactable gas out with the unreactable gas from pressure container prior to expansion tank in mix after be supplemented to top in P-xylene Storage Tank again through gas-guide pipeline.
Feature of the present invention is also, the unreactable gas in pressure container is argon gas, and the argon gas in pressure container to be transported to the top in P-xylene Storage Tank with absolute pressure 0.1-3.4Mpa through Air compressor.
Feature of the present invention is also, the absolute pressure stored in the pressure container of unreactable gas controls as 0.1-10MPa.
Feature of the present invention is also, is extracted out and is entered condenser by miscellaneous gas more than liquid level in P-xylene Storage Tank carry out condensation every 1-12 hour by centrifugal pump.
Beneficial effect of the present invention is as follows:
Paraxylene stocking system based on inert gas shielding provided by the invention and storage process; the unsafe problems utilizing storage tank long term storage paraxylene to exist can be solved in prior art; the present invention by passing into the unreactable gas to human non-toxic's evil in P-xylene Storage Tank; more than storage tank level is made to be filled with a large amount of unreactable gas; once storage tank leaks gas; paraxylene gas also can not be revealed easily; but the first leakage of unreactable gas; therefore; by the detection to unreactable gas in environment, carry out the potential safety hazard of Timeliness coverage storage tank gas leakage.
Accompanying drawing explanation
Fig. 1 is the structural representation of the paraxylene stocking system that the present invention is based on inert gas shielding;
Wherein, 1. pressure container, 2. P-xylene Storage Tank, 3. expansion tank, 4. condenser, 5. centrifugal pump, 6. Air compressor.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, the embodiment of the present invention comprises based on the paraxylene stocking system of inert gas shielding: store the pressure container 1 of unreactable gas, P-xylene Storage Tank 2, expansion tank 3 and condenser 4 for storing liquid paraxylene; In the present embodiment, the unreactable gas stored in pressure container 1 is argon gas, pressure container 1 is connected with P-xylene Storage Tank 2 and expansion tank 3 respectively by gas-guide pipeline, pressure container 1 is provided with Air compressor 6 on the gas-guide pipeline be connected with P-xylene Storage Tank 2 and expansion tank 3, and the unreactable gas-argon gas in pressure container 1 can be realized respectively to be transported in dimethylbenzene storage tank 2 and expansion tank 3.P-xylene Storage Tank 2 is connected through the top of centrifugal pump 5 with condenser 4 by gas-guide pipeline, in use, by centrifugal pump miscellaneous gas more than liquid level in P-xylene Storage Tank 2 is retracted in condenser and carries out condensation, the bottom of condenser 4 is connected with expansion tank 3, and the liquid obtained after condenser 4 and the unreactable gas be not condensed all enter into expansion tank.Expansion tank 3 is also connected with P-xylene Storage Tank 2 with liquid guide pipeline respectively by gas-guide pipeline, the gas-guide pipeline that expansion tank 3 is connected with P-xylene Storage Tank 2 is provided with Air compressor, after mixing in expansion tank with the unreactable gas from pressure container, the top in P-xylene Storage Tank can be supplemented to through condenser unreactable gas out through Air compressor.
In the present embodiment, should also comprise the unreactable gas detector be placed in P-xylene Storage Tank 2 external environment, for the unreactable gas whether having leakage in testing environment based on the paraxylene stocking system of inert gas shielding.
Expansion tank 3 is also provided with melt cinder discharge side, and melt cinder discharge side is connected with melt cinder accumulator tank by pipeline.P-xylene Storage Tank 2 is for storing liquid paraxylene, the liquid paraxylene stored due to P-xylene Storage Tank 2 probably contains a small amount of impurity such as methyl alcohol, therefore after utilizing P-xylene Storage Tank long term storage paraxylene, more than the upper space in P-xylene Storage Tank and liquid level have a large amount of gaseous state paraxylene and and a small amount of methanol gas, after condenser is by Mixed Gas Condensation, have the melt cinder that hoot contains the impurity such as methyl alcohol occur and enter into expansion tank, by arranging melt cinder discharge side to expansion tank 3, the discharge to melt cinder is completed by melt cinder discharge side, the collection of the melt cinder to discharge is carried out by melt cinder accumulator tank, therefore, the purity of the final paraxylene stored is promoted further.
The embodiment of the present invention, based on the paraxylene storage process of inert gas shielding, is carried out in the following manner:
Step 1, provides the paraxylene stocking system based on inert gas shielding;
Based on the paraxylene stocking system of inert gas shielding, comprising: store the pressure container 1 of unreactable gas, P-xylene Storage Tank 2, expansion tank 3 and condenser 4 for storing liquid paraxylene; In the present embodiment, the unreactable gas stored in pressure container 1 is argon gas, and the absolute pressure stored in the pressure container of unreactable gas controls as 0.1-10MPa.Pressure container 1 is connected with P-xylene Storage Tank 2 and expansion tank 3 respectively by gas-guide pipeline, pressure container 1 is provided with Air compressor 6 on the gas-guide pipeline be connected with P-xylene Storage Tank 2 and expansion tank 3, P-xylene Storage Tank 2 is connected through the top of centrifugal pump 5 with condenser 4 by gas-guide pipeline, the bottom of condenser 4 is connected with expansion tank 3, expansion tank 3 is also connected with P-xylene Storage Tank 2 with liquid guide pipeline respectively by gas-guide pipeline, and the gas-guide pipeline that expansion tank 3 is connected with P-xylene Storage Tank 2 is provided with Air compressor 6.
Step 2, to be passed into the top in P-xylene Storage Tank 2 through gas-guide pipeline by Air compressor 6 by the unreactable gas in pressure container 1; In the embodiment of this technique, unreactable gas in pressure container 1 is argon gas, argon gas in pressure container 1 to be transported to the top in P-xylene Storage Tank 2 with absolute pressure 0.1-3.4Mpa through Air compressor, such pressure out of reach makes argon gas, therefore argon gas is the top being present in P-xylene Storage Tank 2 in a gaseous form all the time in P-xylene Storage Tank, therefore, if when there is gas leakage in P-xylene Storage Tank, first argon gas can be revealed, instead of the gaseous state paraxylene in traditional handicraft in P-xylene Storage Tank more than liquid level.
Step 3, miscellaneous gas more than liquid level in P-xylene Storage Tank 2 is extracted out by centrifugal pump 5 by timing, miscellaneous gas after extraction is introduced into condenser 4 through gas-guide pipeline and carries out condensation, then the liquid paraxylene obtained after condensation and without liquefaction argon gas enter into expansion tank 3 again, expansion tank 3 liquid paraxylene is out back in P-xylene Storage Tank through liquid guide pipeline again, through condenser argon gas out with the argon gas from pressure container prior to expansion tank in mix after utilize Air compressor to be supplemented to top in P-xylene Storage Tank through gas-guide pipeline again.
In step 3, miscellaneous gas more than liquid level in P-xylene Storage Tank was extracted out every 1-12 hour by centrifugal pump and entered condenser carry out condensation.
Wherein, in above-mentioned steps 3, mix in expansion tank with volume ratio 1:10-10:1 with the argon gas from pressure container through condenser argon gas out, and then utilize Air compressor to be supplemented to top (in P-xylene Storage Tank more than liquid level) in P-xylene Storage Tank through gas-guide pipeline, wherein replenish in P-xylene Storage Tank with absolute pressure 0.1-3.4Mpa.
As the optimal way of the embodiment of the present invention based on the paraxylene storage process of inert gas shielding; in step; the paraxylene stocking system based on inert gas shielding provided also comprises the unreactable gas detector be placed in P-xylene Storage Tank 2 external environment, for the unreactable gas whether having leakage in testing environment.In step 2, unreactable gas in pressure container to be passed into the top in P-xylene Storage Tank through gas-guide pipeline by Air compressor after, the situation detecting argon gas according to unreactable gas detector judges whether dimethylbenzene storage tank 2 leaks gas, thus avoids paraxylene leakage to cause unnecessary injury to operating personal.
Can improve the expansion tank of stocking system further, the expansion tank 3 of the stocking system provided arranges melt cinder discharge side, and meanwhile, melt cinder discharge side is connected with melt cinder accumulator tank by pipeline.After condenser is by Mixed Gas Condensation, has the melt cinder that hoot contains the impurity such as methyl alcohol and occur and enter into expansion tank, by arranging melt cinder discharge side to expansion tank 3, completing the discharge to melt cinder by melt cinder discharge side.
Paraxylene storage process based on inert gas shielding provided by the invention; adopt argon protection technology; because argon gas belongs to unreactable gas; it is a kind of desirable atmosphere gas; after passing into argon gas in P-xylene Storage Tank, in container, pressure increases, and the dividing potential drop of argon gas increases; the partial pressures such as methyl alcohol will decline, and make it reach explosive limits.Argon pressure controls at absolute pressure 0.1-3.4Mpa, and paraxylene explosive limits scope is reduced, and equipment is run safer.And argon cycles uses by present invention process, innovatively evade unreactable gas discharge and environment has inevitably been polluted, had good promotional value and economic benefit.
Claims (7)
1. the paraxylene stocking system based on inert gas shielding, it is characterized in that, comprise the pressure container (1), P-xylene Storage Tank (2), expansion tank (3) and the condenser (4) for storing liquid paraxylene that store unreactable gas, described pressure container (1) is connected with P-xylene Storage Tank (2) and expansion tank (3) respectively by gas-guide pipeline, pressure container (1) is provided with Air compressor (6) on the gas-guide pipeline be connected with P-xylene Storage Tank (2) and expansion tank (3), described P-xylene Storage Tank (2) is connected through the top of centrifugal pump (5) with condenser (4) by gas-guide pipeline, the bottom of condenser (4) is connected with expansion tank (3), described expansion tank (3) is also connected with P-xylene Storage Tank (2) with liquid guide pipeline respectively by gas-guide pipeline, the gas-guide pipeline that expansion tank (3) is connected with P-xylene Storage Tank (2) is provided with Air compressor (6).
2. a kind of paraxylene stocking system based on inert gas shielding according to claim 1, it is characterized in that, described system also comprises the unreactable gas detector be placed in P-xylene Storage Tank (2) external environment.
3. a kind of paraxylene stocking system based on inert gas shielding according to claim 1 and 2, it is characterized in that, described expansion tank (3) is also provided with melt cinder discharge side, and melt cinder discharge side is connected with melt cinder accumulator tank by pipeline.
4. based on a paraxylene storage process for inert gas shielding, it is characterized in that, carry out in the following manner:
First, the paraxylene stocking system based on inert gas shielding providing a kind of claim 1-3 office to state, unreactable gas in pressure container (1) is passed into by the road the top in P-xylene Storage Tank (2) by Air compressor (6), miscellaneous gas more than P-xylene Storage Tank (2) interior liquid level is extracted out by centrifugal pump (5) by timing, miscellaneous gas after extraction is introduced into condenser (4) through gas-guide pipeline and carries out condensation, then the liquid paraxylene obtained after condensation and without liquefaction unreactable gas enter into expansion tank (3) again, expansion tank (3) liquid paraxylene is out back in P-xylene Storage Tank (2) through liquid guide pipeline again, through condenser (4) unreactable gas out with the unreactable gas from pressure container (1) prior to expansion tank (3) middle mix after be supplemented to the top in P-xylene Storage Tank (2) through gas-guide pipeline again.
5. a kind of paraxylene storage process based on inert gas shielding according to claim 4; it is characterized in that; unreactable gas in pressure container (1) is argon gas, and the argon gas in pressure container (1) to be transported to the top in P-xylene Storage Tank (2) with absolute pressure 0.1-3.4Mpa through Air compressor.
6. a kind of paraxylene storage process based on inert gas shielding according to claim 5, is characterized in that, the absolute pressure stored in the pressure container (1) of unreactable gas controls as 0.1-10MPa.
7. according to the arbitrary described a kind of paraxylene storage process based on inert gas shielding of claim 4-6; it is characterized in that, miscellaneous gas more than P-xylene Storage Tank (2) interior liquid level was extracted out and entered condenser (4) every 1-12 hour carried out condensation by centrifugal pump (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413997.8A CN105059774A (en) | 2015-07-14 | 2015-07-14 | P-xylene storage system and process based on inert gas protection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510413997.8A CN105059774A (en) | 2015-07-14 | 2015-07-14 | P-xylene storage system and process based on inert gas protection |
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| CN105059774A true CN105059774A (en) | 2015-11-18 |
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| CN201510413997.8A Pending CN105059774A (en) | 2015-07-14 | 2015-07-14 | P-xylene storage system and process based on inert gas protection |
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| CN204237053U (en) * | 2014-11-18 | 2015-04-01 | 中国石油化工股份有限公司 | A kind of device of Petrochemical Enterprises atmospheric storage tank tank deck tail gas hermetic reclaim |
| CN204297389U (en) * | 2014-11-14 | 2015-04-29 | 浙江巨圣氟化学有限公司 | A kind of monomer storage tank being applied to polytetrafluoroethylene |
| CN204324089U (en) * | 2014-12-19 | 2015-05-13 | 湖北圣通石化有限公司 | Novel heavy oil tank system |
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2015
- 2015-07-14 CN CN201510413997.8A patent/CN105059774A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1200692A (en) * | 1967-02-21 | 1970-07-29 | Comp Generale Electricite | Apparatus for compensating for variations in gas pressure in the space above the liquid in an expandion tank |
| CN2815956Y (en) * | 2005-04-30 | 2006-09-13 | 上海科创化工有限公司 | Liquid-storage pot of isolating burst by nitrogen |
| CN203624290U (en) * | 2013-11-13 | 2014-06-04 | 中国石油天然气股份有限公司 | Oil depot system capable of storing gasoline and diesel oil for long time |
| CN204056865U (en) * | 2014-07-09 | 2014-12-31 | 南京天膜科技股份有限公司 | A kind of full regenerative apparatus of breathing emission gases of nitrogen-sealed storage tank |
| CN203959058U (en) * | 2014-07-25 | 2014-11-26 | 山东金城柯瑞化学有限公司 | The nitrogen envelope of volatile organism material storage tank and water seal interlock mothballed plant |
| CN204297389U (en) * | 2014-11-14 | 2015-04-29 | 浙江巨圣氟化学有限公司 | A kind of monomer storage tank being applied to polytetrafluoroethylene |
| CN204237053U (en) * | 2014-11-18 | 2015-04-01 | 中国石油化工股份有限公司 | A kind of device of Petrochemical Enterprises atmospheric storage tank tank deck tail gas hermetic reclaim |
| CN204324089U (en) * | 2014-12-19 | 2015-05-13 | 湖北圣通石化有限公司 | Novel heavy oil tank system |
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Application publication date: 20151118 |
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