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Ethylene oxide waste gas recycling treating system

A waste gas recovery, ethylene oxide technology, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of polluting the environment, easy to explode, unable to meet EO emission standards, etc., to achieve low emissions. Effect

Active Publication Date: 2015-01-14
杭州竹影科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The water-soluble method is to directly pass a large amount of EO waste gas into tap water, but this method has the following disadvantages: (1) Since EO dissolution requires a certain amount of time, temperature and other conditions, each cubic meter of tap water is very good for the amount and absorption effect of EO absorption. Limited, unable to meet EO discharge standards; (2) EO solution absorbed by water is easy to volatilize again; a large amount of tap water is needed to dissolve EO, wasting water resources; (3) Wastewater has no use value and needs to be treated by the environmental protection department, and the enterprise will generate additional economic burden
[0004] The high-temperature catalytic combustion method is to burn ethylene oxide at high temperature and under the action of a catalyst. This method has the following disadvantages: (1) ethylene oxide is an active gas, which is prone to explosion and low safety performance; It will produce a large amount of carbon dioxide and pollute the environment; (3) a large amount of air is required for pre-dilution, which wastes resources and is complicated to operate

Method used

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  • Ethylene oxide waste gas recycling treating system
  • Ethylene oxide waste gas recycling treating system
  • Ethylene oxide waste gas recycling treating system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Ethylene oxide waste gas recovery treatment system, such as figure 1 , figure 2 , image 3 as well as Figure 4As shown, it includes a gas-liquid separator 1, a spray cabinet 2, and a water collection tank 3 connected in sequence through pipelines, and the water collection tank 3 is respectively connected with an acid adding tank 4 for adding acid to the water collection tank 3, and a refrigeration unit for controlling the temperature in the water collection tank 3. The unit 5 and the storage tank 6 for collecting ethylene glycol in the water collection tank 3, wherein the acid in the acid addition tank 4 is dilute sulfuric acid with a concentration of 12%; the temperature of the aqueous solution in the water collection tank 3 is 30° C. 4 packing purification absorption towers 7 that absorb ethylene oxide sequentially. Packing purification absorption towers 7 are equipped with packing layers. The tops of the first 3 packing purification absorption towers 7 are equipp...

Embodiment 2

[0039] Same as Example 1, except that the acid in the acid adding tank 4 is dilute sulfuric acid with a concentration of 8%; the temperature of the aqueous solution in the water collection tank 3 is 20°C. The water collecting tank 3 is provided with three packing purification absorption towers 7 which absorb ethylene oxide sequentially, and the height of the packing purification absorption towers 7 is 3m.

[0040] The preparation method of activated carbon solid acid in the activated carbon solid acid layer 8 is:

[0041] First take the volume as 0.2m 3 coconut shell activated carbon, ground and sieved to obtain 40 mesh activated carbon 0.02m 3 , then put it into a scrubber, and wash it repeatedly 6 times with 20L distilled water; then dry the coconut shell activated carbon in an electric constant temperature blast drying oven at 100°C for 6 hours; Volume is 0.02m 3 , the number of meshes is 40 mesh activated carbon into the acid-resistant constant temperature water bath, u...

Embodiment 3

[0043] Same as Example 1, except that the acid in the acid adding tank 4 is dilute sulfuric acid with a concentration of 16%; the temperature of the aqueous solution in the water collection tank 3 is 50°C. The water collecting tank 3 is provided with 8 packing purification absorption towers 7 which absorb ethylene oxide sequentially, and the height of the packing purification absorption towers 7 is 6m.

[0044] The preparation method of activated carbon solid acid in the activated carbon solid acid layer 8 is:

[0045] First take the volume as 0.8m 3 Wooden activated carbon, ground and sieved to obtain 30 mesh activated carbon 0.05m 3 , then put it into a scrubber, and wash it repeatedly 8 times with 30L distilled water; then dry the washed wood activated carbon in an electric heating constant temperature blast drying oven at 200°C for 4 hours; 0.05m 3 , the number of meshes is 30 mesh activated carbon into the acid-resistant constant temperature water bath, use an electric...

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Abstract

The invention relates to a waste gas treatment system and in particular relates to an ethylene oxide waste gas recycling treating system. The ethylene oxide waste gas recycling treating system comprises a gas-liquid separator (1), an atomizing cabinet (2) and a water collection tank (3) which are sequentially connected with one another by virtue of a pipeline, wherein N filler purifying absorbing towers (7) used for absorbing ethylene oxide are sequentially arranged inside the water collection tank (3); filler layers are arranged inside the filler purifying absorbing towers (7); pipelines connected with the water collection tank are arranged at the top ends of former N-1 filler purifying absorbing towers (7); an active carbon solid acid layer (8) is arranged at the upper part of the filter layer of the Nth filler purifying absorbing tower (7). According to the ethylene oxide waste gas recycling treating system, the ethylene oxide is cooled firstly and is in relatively well contact with water vapor, then ethylene glycol within a wide application range is generated by the ethylene oxide in a multistage absorbing tower, finally the ethylene oxide is adsorbed and converted again by active carbon solid acid, so that the emission amount of the ethylene oxide is minimized.

Description

technical field [0001] The invention relates to a waste gas treatment system, in particular to an ethylene oxide waste gas recovery and treatment system. Background technique [0002] At present, the main sources of EO waste gas in the market are enterprises that manufacture disposable medical devices and disposable sanitary products, such as disposable needles, medical gauze, band-aids, sanitary napkins, etc. Since the market adopts EO sterilization technology, the methods used by waste production enterprises to treat EO waste gas are generally water-soluble method or high-temperature catalytic combustion method. [0003] The water-soluble method is to directly pass a large amount of EO waste gas into tap water, but this method has the following disadvantages: (1) Since EO dissolution requires a certain amount of time, temperature and other conditions, each cubic meter of tap water is very good for the amount and absorption effect of EO absorption. Limited, unable to meet ...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/86B01D53/72
Inventor 李云王云
Owner 杭州竹影科技有限公司
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