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Treatment method and device of tail gas in loading and unloading processes of epoxypropane and dichloropropane

A technology of dichloropropane and propylene oxide, which is applied in the field of the treatment process of the tail gas of the loading and unloading trucks of organic substances, can solve the problems such as affecting the safe production operation and the corrosion of the incinerator, and achieve the effect of improving the utilization rate of cooling capacity.

Inactive Publication Date: 2019-10-25
BEFAR GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some enterprises use incinerators to burn off the tail gas, but hydrogen chloride will be produced during combustion, which will cause serious corrosion to the incinerator and affect safe production and operation.

Method used

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  • Treatment method and device of tail gas in loading and unloading processes of epoxypropane and dichloropropane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of treatment method of tail gas in the loading and unloading process of propylene oxide, dichloropropane, it is characterized in that, comprises the following steps:

[0031] (1) The tail gas of the propylene oxide and dichloropropane loading and unloading truck enters the buffer tank through the tail gas;

[0032] (2) The buffered propylene oxide and dichloropropane loading and unloading truck tail gas enters the Roots blower to pressurize through the tail gas;

[0033] (3) The exhaust gas of the supercharged propylene oxide and dichloropropane loading and unloading vehicles enters the heat exchange channel through the exhaust gas;

[0034] (4) The tail gas of the propylene oxide and dichloropropane loading and unloading vehicles through the heat exchange channel enters the cold box system through the tail gas;

[0035] (5) After the exhaust gas of propylene oxide and dichloropropane loading and unloading trucks enters the cold box system through the exhaust ga...

Embodiment 2

[0045] like figure 1 As shown, the tail gas treatment method and device design in the process of loading and unloading propylene oxide and dichloropropane provided in Example 2, which has all the components of the refining device provided in Example 1, will not be elaborated here. Different from Embodiment 1, the refining device of Embodiment 2 also includes a gas buffer tank 11, a compressor 12, a heat exchanger 13, and an expander 14, wherein the outlet of the gas buffer tank 11 is connected to the compressor 12 for exchange. The inlet of the heat exchanger 13, the outlet of the heat exchanger 13 are connected to the inlet of the gas buffer tank 11 through the expander 14, and the temperature of the gas increases from the gas buffer tank 11 to the compressor 12 after pressurization, then cools at the heat exchanger 13, and then goes to the expander 14 works under reduced pressure, and finally in the gas buffer tank 11, completes a cooling cycle.

[0046] The beneficial effe...

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Abstract

The invention discloses a treatment method of tail gas in the loading and unloading processes of epoxypropane and dichloropropane. The treatment method is characterized by comprising the following steps that epoxypropane and dichloropropane loading and unloading tail gas enters a buffer tank through a tail gas pipeline; buffered epoxypropane and dichloropropane loading and unloading tail gas enters a Rootes blower through a tail gas pipeline to be pressurized; then pressurized epoxypropane and dichloropropane loading and unloading tail gas enters a heat exchange channel through a tail gas pipeline; the epoxypropane and dichloropropane loading and unloading tail gas passing through the heat exchange channel enters a cold box system through a tail gas pipeline; after entering the cold box system through the tail gas pipeline, the epoxypropane and dichloropropane loading and unloading tail gas passes through a large-channel plate-fin heat exchanger firstly to be condensed to minus 100 DEGC, wherein trace moisture is frozen in the channel, the cooled tail gas enters a first gas-liquid separator, and condensed liquid with components such as VOCs is separated. The requirements for recovery of valuable materials in the tail gas and environment-friendly up-to-standard discharge are met.

Description

technical field [0001] The invention relates to a process for treating tail gas of loading and unloading organic matter, in particular to a method and a device for treating tail gas in the process of loading and unloading propylene oxide and dichloropropane. Background technique [0002] At present, the chloroalcoholization tail gas produced by the domestic production process of propylene oxide chloroalcoholization adopts the method of venting. Vented components are mainly ethylene, ethane, propylene, propane, dichloropropane, etc., which do not meet environmental protection requirements. Some enterprises use incinerators to burn off the exhaust gas, but hydrogen chloride will be produced during combustion, which will cause serious corrosion to the incinerator and affect safe production and operation. In order to change this situation, our company has independently developed a set of cryogenic and activated carbon fiber adsorption process for treating chloroalcoholization t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/00B01D53/04F28D9/00F28F3/02
CPCB01D53/002B01D53/04B01D2253/102B01D2257/708F28D9/00F28F3/02
Inventor 李民堂王增礼张媛华耿立芳张崇森王秀明冯鑫
Owner BEFAR GROUP CO LTD