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Secondary-adsorption organic waste gas recovering method

A secondary adsorption and organic waste gas technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as solvent decomposition and deterioration, and achieve the effect of improving solvent recovery rate

Active Publication Date: 2012-12-05
洛阳印通环保科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the use of normal temperature (20°C) condensation recovery, after each recovery, 10-15% of the solvent in the activated carbon of the secondary adsorber cannot be condensed and recovered, and the solvent remaining in the activated carbon of the secondary adsorber after desorption is over. The phenomenon of solvolysis and deterioration after secondary heating

Method used

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  • Secondary-adsorption organic waste gas recovering method

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Embodiment 1

[0069] This embodiment takes three adsorbers as an example to illustrate the technical solution.

[0070] Since the three adsorbers work in different working conditions, the initial state of the specified cycle recovery step is: adsorber 3 has completed regeneration and desorption and is ready to start exhaust gas adsorption, adsorber 1 has completed desorption solvent condensation recovery, and adsorber 2 The exhaust gas adsorption is almost complete. The following begins the introduction of recycling steps:

[0071] ①Exhaust gas adsorption: (see figure 2 ) The adsorber 2 stops working after the adsorption is completed, and the adsorber 3 starts to adsorb;

[0072] ② Flame retardant gas replacement: (see image 3 ) The air in the adsorber 2 is replaced by a flame retardant gas;

[0073] ③ regeneration desorption and secondary adsorption: (see Figure 4 ) Adsorber 1, condenser, adsorber 2, circulation fan, and heater form a regenerative desorption and secondary adsorptio...

Embodiment 2

[0085]A recovery system equipped with 5 absorbers of the present invention has been actually applied to the waste gas treatment project of a color flexible packaging printing enterprise.

[0086] Since each adsorber works in different working conditions, the initial state of the specified cycle recovery step is: adsorber 3 and adsorber 4 are in the process of exhaust gas adsorption, and adsorber 5 has completed regeneration and desorption and is waiting to start exhaust gas adsorption. Adsorber 1 has completed the heating and desorption solvent condensation recovery, and the exhaust gas adsorption of adsorber 2 is nearly completed. The introduction of the recycling procedure begins below.

[0087] ①Exhaust gas adsorption: (see figure 2 ) The adsorber 2 stops working after exhaust gas adsorption is saturated, and the adsorber 5 starts exhaust gas adsorption. The exhaust gas enters the adsorber after being cooled by the cooler. The VOC gas detection equipment monitors the ex...

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Abstract

The invention provides a secondary-adsorption organic waste gas recovering method, which is characterized in that two or more than two adsorbers sequentially and alternately carry out the processes of waste gas adsorption, secondary adsorption, desorption condense recovery, desorption regeneration and the like, desorption gas is not externally exhausted, the solvent recovery rate is improved, the standard reaching discharge of the tail gas treatment in the whole process is realized, and the problems of solvent decomposition and degeneration caused by repeated heating are solved.

Description

technical field [0001] The invention relates to an organic waste gas recovery method, in particular to a secondary adsorption organic waste gas recovery method used in color flexible packaging printing and dry compound production to discharge waste gas. Background technique [0002] At present, when the plastic organic industry uses benzene-soluble inks, the organic waste gas adopts activated carbon adsorption, steam desorption and condensation recovery processes at room temperature, which can basically achieve standard emission of waste gas and solvent recovery and reuse. [0003] As GB / T 10004-2008 "Plastic Composite Film for Packaging, Bag Dry Lamination, Extrusion Lamination" implemented by the country on August 1, 2009 has stipulated that the product must not have benzene detection. It is an inevitable choice for plastic flexible packaging printing, especially for food and pharmaceutical plastic flexible packaging printing inks with the largest output, to switch from be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/02
Inventor 孙宗长胡建林袁亦扬孙绍文王海斌
Owner 洛阳印通环保科技有限公司
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