Method for separating and comprehensively utilizing gases in carbon black tail gas and device for realizing method

A technology of gas separation and carbon black, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of long working cycle of temperature swing adsorption, secondary pollution, high energy consumption, etc., shorten the working cycle, improve heat value, the effect of simplifying the separation step

Active Publication Date: 2015-05-20
QINGDAO BLACK CAT CARBON BLACK TECH
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Problems solved by technology

[0009] In order to overcome the problems of secondary pollution caused by the spraying method in the prior art and the long working cycle and high energy cons

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  • Method for separating and comprehensively utilizing gases in carbon black tail gas and device for realizing method

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Embodiment Construction

[0029] The separation method of carbon black tail gas comprises the steps:

[0030] 1) The carbon black tail gas first enters the first-stage pressure swing adsorption tower for H 2 For the adsorption of O gas and sulfur-containing gas, the adsorption material at the bottom of the tower is activated alumina, and the upper layer is 5A and 13X molecular sieves. The operating pressure in the tower is 0.1-0.5MPa, and the temperature is 10-30°C.

[0031] 2) depressurize in the first-stage pressure swing adsorption tower to depressurize H 2 O gas and sulfur-containing gas enter the H through the top of the tower 2 O gas and sulfur-containing gas collection device, the tail gas after the first stage pressure swing adsorption (adsorbed H 2 O gas and sulfur-containing gas) enter the second-stage adsorption tower to absorb N 2 , CO, CO 2 , the operating pressure in the tower is 2.0-2.3MPa, and the temperature is 60-80°C. The adsorption materials are activated carbon and molecular si...

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Abstract

The invention relates to a method for separating and comprehensively utilizing gases in carbon black tail gas and a device for realizing the method. The method for separating and comprehensively utilizing gases in carbon black tail gas comprises the following steps: separating H2O from sulfurous gas by adopting first-stage pressure swing adsorption, separating H2 from N2, CO and CO2 by adopting second-stage pressure swing adsorption, and then separating N2 from CO and CO2 by adopting a third-stage pressure swing adsorption, wherein the H2 separated by the second-stage pressure swing adsorption and the CO and the CO2 which are separated by the third-stage pressure swing adsorption are used as fuels of carbon black combustion and tail gas combustion, and the N2 separated by the third-stage pressure swing adsorption is used for treating the surface of the carbon black. The method has the beneficial effects that steps of separating H2O from the sulfurous gas are simplified, the total removal rate of the H2O gas and the sulfurous gas reaches above 98 percent; the H2 and the N2 are separated respectively by adopting a cooperation effect of the second-stage pressure swing adsorption and the third-stage pressure swing adsorption, so that the separating rate of the H2 and the N2 is improved, and the heat value of the treated tail gas is improved by above 3500kcal/m<3>.

Description

technical field [0001] The invention relates to the separation and comprehensive utilization of carbon black tail gas, in particular to the separation of high calorific value tail gas and N in the carbon black tail gas 2 A method for separation and comprehensive utilization and a device for realizing the method. Background technique [0002] Carbon black tail gas is produced by filtering carbon black flue gas through the main bag filter during carbon black production. The main components are: H 2 10-12% (volume fraction), CO 9-13% (volume fraction), CO 2 2-3% (volume fraction), N 2 36-38% (volume fraction), H 2 O 36-40% (volume fraction), H 2 S 250-800mg / m 3 Wait. [0003] Carbon black production enterprises do not treat the tail gas, and the calorific value of the tail gas is low, only 900-1000kcal / m 3 , 30% of which is burned by the tail gas combustion furnace to provide the energy required for carbon black drying; 70% is burned by the low calorific value tail gas ...

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Application Information

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IPC IPC(8): B01D53/047
CPCY02C20/40
Inventor 王宏周敏建
Owner QINGDAO BLACK CAT CARBON BLACK TECH
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