Dichloromethane waste gas treatment equipment and method

A technology for waste gas treatment equipment and dichloromethane, which is applied in gas treatment, separation methods, chemical instruments and methods, etc. It can solve the problems of low service life of activated carbon adsorption equipment, easy generation of dioxins in combustion methods, and high energy consumption. , to achieve good physical and chemical stability, long service life and low energy consumption

Pending Publication Date: 2021-03-16
HANGZHOU ZHONGHUAN ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems that the dichloromethane condensation method consumes too much energy, the combustion method is easy to produce dioxins, and

Method used

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  • Dichloromethane waste gas treatment equipment and method
  • Dichloromethane waste gas treatment equipment and method
  • Dichloromethane waste gas treatment equipment and method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] Example 1

[0044] Refer Figure 1 ~ 4 , A dichloromethane exhaust gas treatment apparatus including a spray portion and an adsorbent portion including a first spray tower 1 and a second spray tower 2 in communication, including the adsorbent portion comprising The buffer tank 3, the adsorption tower, the condenser 4, the layered tank 10 and the recovery tank 11.

[0045] The adsorbent column includes a first absorbent tower 5, a second adsorption tower 6, and a spare third absorbent tower 7, and the first suction tower 5, the second absorbent tower 6, and the third absorbent tower 7 are filled. There is a corresponding hydrophobic macroporous resin 12, the first adsorption tower 5, the second adsorption tower 6, and the third adsorption tower 7 are connected to the desorption centrifugal pump 13; the first spray tower 1 and the exhaust gas The tube 14 is connected, and the second spray tower 2 is in communication with the buffer tank 3.

[0046] The first spray tower 1, the...

Example Embodiment

[0049] Example 2

[0050] Preparation of hydrophobic macroporous resins

[0051](a) Polymerization monomer (polystyrene, divinylbenzene), porectant (xylene, 200 # Gasoline) mixed, then invested in azo diisobutyronitrile to mix well and mix well, to obtain an oil phase;

[0052] (b) Adding deionized water, polyvinyl alcohol, and sodium chloride in the reaction vessel, stirring and warming, so that the three are completely dissolved and mixed, to obtain aqueous phase; wherein the volume of deionized water is an oil phase volume 4 Double, polyvinyl alcohol volume of 0.02 times the deionized water volume, the mass fraction of sodium chloride accounts for 3% of the water quality;

[0053] (c) Mix the oil phase with the aqueous phase, and the stirring speed is 500 rpm, so that the oil phase is dispersed into liquid beads; then the entire mixing system is warmed to 60 ° C, and the water is adjacent to 70 ° C, constant temperature 2h Then heaven to 80 ° C, constant temperature of 3 h, and...

Example Embodiment

[0060] Example 3

[0061] Preparation of hydrophobic macroporous resins

[0062] (a) Polymerization monomer (polystyrene, divinylbenzene), porectant (xylene, 200 # Gasoline) mixed, then invested in azo diisobutyronitrile to mix well and mix well, to obtain an oil phase;

[0063] (b) Adding deionized water, polyvinyl alcohol, and sodium chloride in the reaction vessel, stirring and warming, so that the three are completely dissolved and mixed, to obtain aqueous phase; wherein the volume of deionized water is an oil phase volume 4 Double, polyvinyl alcohol volume of 0.02 times the deionized water volume, the mass fraction of sodium chloride accounts for 3% of the water quality;

[0064] (c) mix the oil phase with the aqueous phase, set the stirring speed of 600 rpm to disperse the oil phase into liquid beads; then heat up the entire mixing system to 65 ° C, and the water bead is adjacent to 75 ° C, constant temperature 3h After the temperature is heated to 85 ° C, the temperature is...

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Abstract

The invention relates to dichloromethane waste gas treatment equipment and method. The equipment comprises a spraying part and an adsorption part, the spraying part comprises a first spraying tower and a second spraying tower which communicate with each other in sequence, and the adsorption part comprises a buffer tank, adsorption towers, a condenser, a layering tank and a recovery storage tank which communicate with one another in sequence; the adsorption towers comprise a first adsorption tower, a second adsorption tower and a standby third adsorption tower which are connected in series, theadsorption towers are respectively filled with corresponding hydrophobic macroporous resin, and the adsorption towers respectively communicate with a desorption centrifugal pump; and the first spraytower communicates with a waste gas inlet pipe, and the second spray tower communicates with the buffer tank. Spraying and resin adsorption integrated equipment is adopted, most of dichloromethane inhigh-concentration dichloromethane gas can be recycled, and the concentration of the dichloromethane gas in tail gas reaches the emission standard. The equipment and method have the advantages that the energy consumption is lower, the service life is long, dioxin toxic substances are not easy to generate, the solvent can be recycled, and the like.

Description

technical field [0001] The invention relates to waste gas treatment equipment, in particular to a dichloromethane waste gas treatment equipment and method. Background technique [0002] Dichloromethane is widely used in the fields of medicine and film production. With the increase of the consumption of dichloromethane, the concern about its toxicity has begun to attract people's attention. Because dichloromethane is very harmful to the natural environment and human health, researchers at home and abroad have carried out various researches on the treatment technology of dichloromethane, among which the more mature technologies include condensation method, incineration method and adsorption method. [0003] (1) condensation method [0004] Generally, this method can be used for waste gas with small air volume and high concentration, but the concentration of organic matter in the condensed waste gas is still high, and further treatment is required to meet the standard, and the...

Claims

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Application Information

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IPC IPC(8): B01D53/02B01D53/18B01D53/78B01D47/06B01J20/26B01J20/28B01J20/30
CPCB01D47/06B01D53/02B01D53/18B01D53/78B01D2253/202B01D2253/308B01D2257/2064B01D2259/40083B01D2259/403B01D2259/41B01J20/26B01J20/28085Y02A50/20
Inventor 张志伟朱武斌殷松平张文辽
Owner HANGZHOU ZHONGHUAN ENVIRONMENTAL ENG
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