CN103566702A - Method for recycling gas generated in benzene lading process at wharfs - Google Patents
Method for recycling gas generated in benzene lading process at wharfs Download PDFInfo
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- CN103566702A CN103566702A CN201310523008.1A CN201310523008A CN103566702A CN 103566702 A CN103566702 A CN 103566702A CN 201310523008 A CN201310523008 A CN 201310523008A CN 103566702 A CN103566702 A CN 103566702A
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Abstract
The invention relates to a method for recycling gas generated in a benzene lading process at wharfs, and mainly solves the problem in the prior art that the volatile gas generated in the benzene lading process at the wharfs can not be recycled. The method comprises the following steps: (a) collecting the volatile gas generated in the benzene lading process each wharf by a fan (1), and enabling the gas to enter a condensation tank (2), wherein liquid in the condensation tank enters a storage tank (15), gas in the condensation tank enters an adsorption tank (4) for adsorption, and the tail gas is discharged into atmosphere; (b) when the adsorption tank (4) is saturated, carrying out desorption operation on the volatile gas, and regenerating an adsorbing agent; and (c) enabling the desorption matter to enter a heat exchanger (9) for cooling and then to enter a middle storage tank (12), wherein an air phase in the middle storage tank (12) returns to the adsorption tank (4), and a liquid phase is conveyed to the storage tank (15). The technical scheme well solves the problem, and the method can be used for recycling the benzene steam generated in the liquid-state benzene lading process at wharfs.
Description
Technical field
The present invention relates to the recovery method of the gas that a kind of benzene produces in terminal ship process.
Technical background
Benzene, in terminal ship process, can produce a large amount of volatile vapors.These benzene vapours can cause energy waste on the one hand.Benzene is as a kind of inflammable and explosive toxic gas on the other hand, and meeting serious harm terminal ship operation employee's health of human body, causes environmental pollution, and have potential safety hazard.How to process the benzene vapour producing in harbour ship-loading operation process particularly important
Patent CN101559315A discloses a kind of toluene recovery device, and its technology path is to utilize charcoal absorption, vapours desorb, and toluene is reclaimed in cooling laggard row gas-liquid separation.This installs needed vapours is to produce by heating, and the water vapour of generation is limited, is applicable to process the benzene vapour that flow is less, can not be applied to terminal ship.
The benzene retracting device that patent CN201301291Y announces, its technology path is to utilize the cooling washing of water at low temperature, by gas-liquid separation, is reclaiming benzene.This device benzene vapour only carries out emptying through sub-cooled washing, exhaust concentration is higher.
The present invention has solved the problems referred to above targetedly.
Summary of the invention
Technical problem to be solved by this invention is the irretrievable problem of escaping gas that in prior art, benzene produces in terminal ship process, and the recovery method of the gas that a kind of new benzene produces in terminal ship process is provided.The method, for reclaiming in the benzene vapour that liquid phenenyl terminal ship process produces, has advantages of the escaping gas that effective recovery benzene produces in terminal ship process.
For addressing the above problem, the technical solution used in the present invention is as follows: the recovery method of the gas that a kind of benzene produces in terminal ship process, after comprising the steps: that gas that (a) volatilizees each harbour in benzene shipment process is collected by blower fan (1), enter lime set tank (2), liquid in lime set tank (2) enters storage tank (15), gas in lime set tank (2) enters adsorption tanks (4) absorption, through the gas tail gas adsorbing, enters atmosphere; (b), after adsorption tanks (4) are saturated, adsorption tanks (4) start desorption manipulation, and adsorbent is regenerated; (c) it is cooling that the material that adsorption tanks (4) desorption goes out enters heat exchanger (9), and cooled material enters intermediate storage tank (12), and the gas phase in intermediate storage tank (12) is returned to adsorption tanks (4), and liquid phase is delivered to storage tank (15).
In technique scheme, preferably, described blower fan (1) adopts VFC rotating speed according to the signal of micro-pressure sensor.Reach the effect of equilibrium air pressure, protection cabin; After adsorption tanks (4) are saturated, adsorption operations switches to standby adsorption tanks.
In technique scheme, preferably, liquid-level switch indication is installed in described lime set tank (2), when the liquid gathering reaches setting liquid level, opens centrifugal pump (14) and liquid is evacuated in storage tank (15); Lime set tank arranges emergent evacuation pipeline on (2), handicapping fire Ventilated cap (3) on pipeline.
In technique scheme, preferably, described adsorption tanks have two at least, and when one of them adsorption tanks is during in adsorbed state, another adsorption tanks are in detachment status, and when desorption completes, the running status of two tanks is switched, and two adsorption tanks so hocket.
In technique scheme, preferably, the adsorbent in adsorption tanks (4) is active carbon.
In technique scheme, preferably, during described adsorption tanks desorption, adopt the mode vacuumizing to carry out desorb to adsorbent material.
This patent provides a kind of charcoal absorption, vacuum desorption, the benzene gas recovery method of cooling water condensation, the benzene gas producing in recyclable terminal ship process, all emission gases all must be through charcoal absorption, therefore the concentration of emission of device is lower, and the benzene vapour rate of recovery can reach more than 95%, and concentration of emission is lower than 8mg/m
3, obtained good technique effect.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the method for the invention.
1-blower fan; 2-lime set tank; 3-emergent evacuation pipeline; 4-adsorption tanks; 5-discharge pipe line; 6-nitrogen blowing mouth; 7-vavuum pump; 8-surge tank; 9-heat exchanger; 10-water circulating pump; 11-plant area hypothermic saline; 12-intermediate storage tank; 13-secondary recovery pipeline; 14-tubing pump; 15-tank field benzene storage tank.
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
The specific embodiment
[embodiment 1]
The benzene vapor that benzene volatilizees in terminal ship process is collected by blower fan at by-pass line respectively, then enters oil gas and reclaims Trunk Line.Blower fan adopts VFC rotating speed according to the signal of micro-pressure sensor.Reach equilibrium air pressure, the effect of protection cabin.The organic gas steam that blower fan is collected enters retracting device and recycles, and the gas of meet the requirement of environmental protection is discharged in atmosphere after treatment.
In flow process as shown in Figure 1, first organic gas steam enters lime set tank 2 after blower fan 1 collects, and lime set tank is positioned at the minimum point of device, for collecting the liquid being condensed in pipeline.The in-built liquid-level switch of lime set tank, when in lime set tank, the liquid phenenyl of condensation reaches setting liquid level, tubing pump 14 is opened liquid is evacuated in storage tank 15.Dump pipeline is set on lime set tank, and when device stops, gas will be discharged by dump pipeline, avoid freely normal shipment not being impacted because of gas circuit.
Gas through lime set tank 2 enters in absorbent charcoal adsorption tank 4.Device has two absorbent charcoal adsorption tanks, and when one of them adsorption tanks is during in adsorbed state, another adsorption tanks are in desorption state, and when when desorb completes, the running status of two tanks is switched, and two adsorption tanks so hocket.When adsorption tanks are adsorbed onto setting value, vavuum pump starts, and adsorption tanks are carried out to vacuum desorption.After adsorption tanks pressure reaches 5kpa, need to introduce a small amount of nitrogen from blow line 6 active carbon is purged.The gas that vavuum pump desorbs first, after surge tank buffering, enters heat exchanger cooling.The benzene that cooled gas and condensation are got off enters intermediate storage tank 11, and gas comes back to charcoal canister by secondary recovery pipeline and adsorbs, and the liquid phenenyl that condensation is got off is stored in intermediate storage tank.Liquid level gauge is housed in intermediate storage tank, and when the condensation liquid phenenyl that gets off reaches after certain liquid level, tubing pump 12 is opened liquid is evacuated to tank field storage tank.
Heat exchanger carries out heat exchange by cycle industrial hypothermic saline, needs harbour that low-temperature industrial salt solution is provided, and by water circulating pump 10Cong plant area 11, is sent to and in heat exchanger, is carried out heat exchange.Hypothermic saline temperature must not be higher than 10 ℃, in order to avoid affect the operating efficiency of heat exchanger.
Claims (6)
1. a recovery method for the gas that benzene produces in terminal ship process, comprises the steps:
(a) after the gas each harbour being volatilized in benzene shipment process is collected by blower fan (1), enter lime set tank (2), liquid in lime set tank (2) enters storage tank (15), and the gas in lime set tank (2) enters adsorption tanks (4) absorption, through the gas tail gas adsorbing, enters atmosphere;
(b), after adsorption tanks (4) are saturated, adsorption tanks (4) start desorption manipulation, and adsorbent is regenerated;
(c) it is cooling that the material that adsorption tanks (4) desorption goes out enters heat exchanger (9), and cooled material enters intermediate storage tank (12), and the gas phase in intermediate storage tank (12) is returned to adsorption tanks (4), and liquid phase is delivered to storage tank (15).
2. the recovery method of the gas that benzene produces in terminal ship process according to claim 1, is characterized in that described blower fan (1) adopts VFC rotating speed according to the signal of micro-pressure sensor, reaches the effect of equilibrium air pressure, protection cabin; After adsorption tanks (4) are saturated, adsorption operations switches to standby adsorption tanks.
3. the recovery method of the gas that benzene produces in terminal ship process according to claim 1, it is characterized in that, in described lime set tank (2), liquid-level switch indication is installed, when the liquid gathering reaches setting liquid level, open centrifugal pump (14) and liquid is evacuated in storage tank (15); Lime set tank arranges emergent evacuation pipeline on (2), handicapping fire Ventilated cap (3) on pipeline.
4. the recovery method of the gas that benzene produces in terminal ship process according to claim 1, it is characterized in that described adsorption tanks have two at least, when one of them adsorption tanks is during in adsorbed state, another adsorption tanks are in detachment status, when desorption completes, the running status of two tanks is switched, and two adsorption tanks so hocket.
5. the recovery method of the gas that benzene produces in terminal ship process according to claim 1, while it is characterized in that described adsorption tanks desorption, adopts the mode vacuumizing to carry out desorb to adsorbent material.
6. the recovery method of the gas that benzene produces in terminal ship process according to claim 1, is characterized in that the adsorbent in described adsorption tanks (4) is active carbon.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310523008.1A CN103566702A (en) | 2013-10-29 | 2013-10-29 | Method for recycling gas generated in benzene lading process at wharfs |
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| CN201310523008.1A CN103566702A (en) | 2013-10-29 | 2013-10-29 | Method for recycling gas generated in benzene lading process at wharfs |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104436984A (en) * | 2014-11-04 | 2015-03-25 | 中国石油化工股份有限公司 | Passivation device of 'adsorption method' oil-gas recovery system |
| CN104815519A (en) * | 2015-04-09 | 2015-08-05 | 北京信诺海博石化科技发展有限公司 | Recovery technology for volatile oil gas in lightweight aromatic hydrocarbons filling process |
| CN105194977A (en) * | 2015-09-25 | 2015-12-30 | 杭州宝诺化工科技有限公司 | Oil gas recovery apparatus with recycling function |
| CN107050912A (en) * | 2017-01-13 | 2017-08-18 | 陕西延长石油（集团）有限责任公司 | A kind of vapor condensation liquid recovery system and method |
| CN112478476A (en) * | 2020-12-03 | 2021-03-12 | 南通千红石化港储有限公司 | Environment-friendly styrene ship loading and unloading storage system and loading and unloading storage method thereof |
| CN114261644A (en) * | 2021-12-31 | 2022-04-01 | 福州江阴建滔化工码头有限公司 | Port crude MDI storage and transportation system and method |
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| CN201124073Y (en) * | 2007-11-14 | 2008-10-01 | 中国石油化工股份有限公司 | Vapour recovery unit with frequency conversion blower fan |
| CN202289807U (en) * | 2011-10-17 | 2012-07-04 | 中国石油化工股份有限公司 | Adsorption and condensation technology-based organic vapor recovery unit |
| CN102764517A (en) * | 2012-07-27 | 2012-11-07 | 海湾环境科技（北京）股份有限公司 | Waste gas recovery processing system and recovery processing technique used in chemical car loading |
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- 2013-10-29 CN CN201310523008.1A patent/CN103566702A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201124073Y (en) * | 2007-11-14 | 2008-10-01 | 中国石油化工股份有限公司 | Vapour recovery unit with frequency conversion blower fan |
| CN202289807U (en) * | 2011-10-17 | 2012-07-04 | 中国石油化工股份有限公司 | Adsorption and condensation technology-based organic vapor recovery unit |
| CN102764517A (en) * | 2012-07-27 | 2012-11-07 | 海湾环境科技（北京）股份有限公司 | Waste gas recovery processing system and recovery processing technique used in chemical car loading |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104436984A (en) * | 2014-11-04 | 2015-03-25 | 中国石油化工股份有限公司 | Passivation device of 'adsorption method' oil-gas recovery system |
| CN104436984B (en) * | 2014-11-04 | 2017-02-08 | 中国石油化工股份有限公司青岛安全工程研究院 | Passivation device of 'adsorption method' oil-gas recovery system |
| CN104815519A (en) * | 2015-04-09 | 2015-08-05 | 北京信诺海博石化科技发展有限公司 | Recovery technology for volatile oil gas in lightweight aromatic hydrocarbons filling process |
| CN105194977A (en) * | 2015-09-25 | 2015-12-30 | 杭州宝诺化工科技有限公司 | Oil gas recovery apparatus with recycling function |
| CN107050912A (en) * | 2017-01-13 | 2017-08-18 | 陕西延长石油（集团）有限责任公司 | A kind of vapor condensation liquid recovery system and method |
| CN112478476A (en) * | 2020-12-03 | 2021-03-12 | 南通千红石化港储有限公司 | Environment-friendly styrene ship loading and unloading storage system and loading and unloading storage method thereof |
| CN114261644A (en) * | 2021-12-31 | 2022-04-01 | 福州江阴建滔化工码头有限公司 | Port crude MDI storage and transportation system and method |
| CN114261644B (en) * | 2021-12-31 | 2023-02-24 | 福州江阴建滔化工码头有限公司 | Port crude MDI storage and transportation system and method |
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Application publication date: 20140212 |