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Chlorine and sulfur containing tail gas processing device and tail gas processing method thereof

A technology for tail gas treatment and tail gas, which is applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., to achieve the effect of simple process

Inactive Publication Date: 2016-03-23
BEIJING HUAFU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, for the treatment of high-temperature tail gas with high chloride and sulfide content, there is no device that can not only make good use of the heat energy of the tail gas, but also achieve standard discharge.

Method used

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  • Chlorine and sulfur containing tail gas processing device and tail gas processing method thereof

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Embodiment 1

[0059] use as figure 1 A chlorine-containing and sulfur-containing tail gas treatment device is shown for tail gas treatment. The chlorine-containing and sulfur-containing tail gas is the exhaust gas produced after the catalyst is continuously regenerated and burnt in a propane or butane dehydrogenation device, and the hydrogen chloride content is 0.3vol%. , the sulfur dioxide content is 0.026vol%, and the chlorine content is 0.05vol%. The chlorine-containing and sulfur-containing tail gas enters the absorption tower 2 after heat exchange, and is countercurrently contacted with the lye (the mass fraction is 10% NaOH aqueous solution) sprayed on the top of the tower, and the tail gas The acid gas in the acid gas reacts with lye to form salt, which drops to the bottom of the tower and is sent to the top of the tower for circulation through the circulating water pump 5; the lye at the bottom of the tower is sent to the middle of the tower for circulation through the circulating ly...

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Abstract

The invention provides a chlorine and sulfur containing tail gas processing device and a tail gas processing method thereof. The device comprises a heat exchanger, an absorbing tower, a gas-liquid separator, and an adsorption tower; wherein the heat exchanger, absorbing tower, gas-liquid separator, and adsorption tower are communicated in the air passage. The upper section of the absorbing tower adopts a water circulation treatment mode, and a circulating water pump is used to increase the pressure. The lower second of the absorbing tower adopts an alkali liquid circulation treatment mode, the pressure of alkali liquid is increased by a pump, then alkali liquid is pumped into an alkali liquid heater and is heated by the alkali liquid heater; and finally the alkali liquid is introduced to the lower section of the absorbing tower and is cyclically used. The device can recover the thermal energy of tail gas through the heat exchanger; at the same time, the high temperature tail gas, which contains high concentration corrosive mediums such as hydrogen chloride, sulfur dioxide, chlorine gas, and the like, is effectively processed through alkali liquid absorption; and the processed tail gas can reach the emission standards.

Description

technical field [0001] The invention relates to the technical field of tail gas treatment in the petrochemical industry, in particular to a chlorine and sulfur tail gas treatment device and a tail gas treatment method thereof. Background technique [0002] High-temperature roasting is a key process for catalyst regeneration in many refinery and chemical plants. Corrosive gases need to be injected during the roasting process to improve catalyst activity, but the treatment of tail gas containing corrosive gases has become the key to clean and environmentally friendly technologies. [0003] The pure alkali absorption method has high treatment costs, and is often only used in the case of small waste gas volume and low chloride and sulfide content. It is usually used in series with the water washing method, and is often used for non-high temperature tail gas treatment. If the content of chlorides and sulfides is relatively high, only the method of absorption is used, the amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50B01D53/68
CPCB01D53/78B01D53/501B01D53/68B01D2257/2025B01D2257/2045B01D2257/302B01D2259/124
Inventor 胡慧晔杨石波
Owner BEIJING HUAFU ENG
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