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Method for recovering multi-component organic gas mixture

A technology of organic gas and recovery method, applied in separation method, chemical instrument and method, vapor condensation, etc., can solve the problem of not being able to recover at the same time

Inactive Publication Date: 2014-02-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem that volatile gases such as benzene, toluene, xylene, gasoline, etc. produced in chemical plant loading, shipping, and storage tanks in the prior art cannot be recovered at the same time, and a new multi-component mixed organic gas recovery method

Method used

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  • Method for recovering multi-component organic gas mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 In the process shown, the volatilized vapors of gasoline, benzene, toluene, xylene and other organic substances are collected in the branch pipeline by fan 1 in the process of loading vehicles, shipping and respiration of storage tanks, and then enter the main pipeline for oil and gas recovery. According to the signal of the micro-pressure sensor, the fan adopts frequency conversion to control the speed, so as to protect the storage tank and tank car and balance the air pressure. The organic gas vapor collected by the fan enters the recovery device for recovery treatment, and the gas that meets the environmental protection requirements is discharged into the atmosphere after treatment.

[0026] Organic gas mass composition: 50% gasoline, 20% benzene, 20% toluene, 10% o-xylene, the steam first enters the condensate tank 2 after being collected by the fan 1, and the condensate tank 2 is located at the lowest point of the device for collecting condensation l...

Embodiment 2

[0031] According to the conditions and steps described in Example 1, the mass composition of organic gas is: gasoline 50%, benzene 20%, o-xylene 30%.

[0032]The gas passing through the condensate tank 2 enters the refrigeration unit for multi-stage continuous cooling. The organic gas first enters the pre-cooler 18 for pre-condensation. The cooling medium used in the pre-condensation is water, which is supplied by the circulating water of the factory. After pre-cooling, the temperature drops to about 8°C, and most of the benzene vapor is condensed and recovered. After that, the vapor enters the two-stage compression refrigeration system, and each stage of the refrigeration system includes equipment and components such as compressors, evaporators, condensers, and expansion valves. After the first stage of condensation, the temperature of the gas steam can be reduced to about -25°C, and the main condensed substance is o-xylene; after the second stage of condensation, the tempera...

Embodiment 3

[0034] According to the conditions and steps described in Example 1, the mass composition of the organic gas is: 50% benzene and 50% o-xylene.

[0035] The gas passing through the condensate tank 2 enters the refrigeration unit for multi-stage continuous cooling. The organic gas first enters the pre-cooler 18 for pre-condensation. The cooling medium used in the pre-condensation is water, which is supplied by the circulating water of the factory. After pre-cooling, the temperature drops to about 8°C, and most of the benzene vapor is condensed and recovered. After that, the vapor enters the first-stage compression refrigeration system, which includes equipment and components such as compressor, evaporator, condenser and expansion valve. The temperature of the gas vapor can be reduced to about -25°C after the first stage of condensation. The main condensed substance is o-xylene, and nearly 95% of the gas vapor can be condensed.

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Abstract

The invention relates to a method for recovering a multi-component organic gas mixture, and is mainly used for solving the problem in the prior art that volatile gases such as benzene, toluene, dimethylbenzene and gasoline produced in the large and small breathing of truck loading, shipping, storage tanks and the like of a chemical plant cannot be simultaneously recovered. The method for recovering the multi-component organic gas mixture comprises the following steps of (a) causing organic gases to sequentially enter a condensate tank (2) and a refrigerating unit, causing condensed liquid to enter an oil-water separator (5), and causing organic substances of the oil-water separator (5) to enter a storage tank (6); (b) adsorbing the gases in an adsorption tank (9); (c) after the adsorption tank (9) is saturated, switching to an adsorption tank (10), and starting the desorption of the adsorption tank (9); (d) returning substances desorbed from the adsorption tank (9) to the refrigerating unit. According to the technical scheme, the problem is well solved; the method can be used for recovering the volatile gases such as benzene, toluene, dimethylbenzene and gasoline produced in the large and small breathing of truck loading, shipping and storage tanks of the chemical plant.

Description

technical field [0001] The present invention relates to a method for recovering multi-component mixed organic gas, especially for recovering and treating volatile gases produced during tanker loading, wharf loading and storage tank breathing, including gasoline vapor, benzene, toluene, A recovery method for xylene vapor and the mixed gas composed of them. technical background [0002] Gasoline, benzene, toluene, xylene, etc. will produce a large amount of evaporation loss during the loading and shipping process and the breathing process of their storage tanks. The steam generated by evaporation is directly discharged into the atmosphere, which will cause a lot of energy waste; On the other hand, these vapors have a strong poisonous effect on the human body; in addition, the formation of flammable volatile gases not only poses serious safety hazards; but also oil and gas can form photochemical smog under ultraviolet radiation, causing environmental pollution. At present, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D5/00B01D53/02
Inventor 张健中李俊杰宫中昊周金广刘林杰张晓萌单晓雯
Owner CHINA PETROLEUM & CHEM CORP
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