Method and device for recovering gas containing water-soluble organic compounds
An organic compound and water-soluble technology, which is used in the field of recycling waste gas containing water-soluble organic compounds, can solve the problems of inability to perform rectification, low column top temperature, and large thermal energy consumption, so as to ensure continuous normal operation and reduce energy consumption. , the effect of reducing heat consumption
Active Publication Date: 2009-10-28
何金星 +1
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Problems solved by technology
The above-mentioned process has the following defects through practice: 1. The analytical steam that has already belonged to the vaporization state must first be condensed into a liquid state, and then heated by a heat source into a vaporization state. This process of first condensing and then heating has caused a large amount of thermal energy loss. Waste; 2. It needs to invest in a heat exchanger with a large heat exchange area
The above defects make the waste gas recovery and refining process of water-soluble organic compounds consume a lot of heat energy, and the recovery cost is high, which seriously affects the economic benefits of the enterprise
[0003] If the desorption steam directly enters the rectification tower wi...
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[0025] Such as figure 1 with figure 2 As shown, in general, if the water-soluble mixture contains organic compounds with multiple components, the rectification temperature is usually higher than the boiling point of the component with the highest boiling point among all the components. The above operating data are based on specific process requirements. Selection, these selections are easy to do for those of ordinary skill in the art.
[0026] A method of recovering waste gas containing water-soluble organic compounds of the present invention comprises:
[0027] (1) Collect waste gas of water-soluble organic compounds whose temperature is higher than 50°C; send the above-mentioned waste gas into the first-level surface cooler 1 to cool to 35-40°C;
[0028] (2) Collect the waste gas of water-soluble organic compounds at a temperature lower than 50°C; combine the waste gas with the cooled waste gas in step (1), and then send it to the bag filter 2 for filtration, and then sen...
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The invention relates to a method and a device for recovering gas containing water-soluble organic compounds. The method includes steps of using saturated water vapor to carry out desorption for waste gas adsorbed by a absorber, conveying desorbed gas containing mixture of air and liquid from the third minute to the fifth minute after the desorption begins to a desorption gas condenser to condense under 40 DEG C, conveying the condensed gas into a gas-liquid phase-splitter to carry out gas liquid separation, pumping water solution containing the solvent into a reboiler to vaporize by heating, conveying the gas into a distillation tower for rectifying after vaporizing; directly conveying desorbed gas not containing the mixture of air and liquid 5 minutes after the desorption begins into the distillation tower for rectifying, controlling tower top temperature of the distillation tower in a range of +/- 1 DEG C of boiling point of the water-soluble organic compounds, and obtaining the water-soluble organic compounds capable of being circularly used after conveying tower top fraction into a fraction condenser to condense to temperature lower than 40 DEG C. The invention not only can excellently recovers waste gas, but also reduces heat energy consumption by more than 40% in device operation process.
Description
technical field [0001] The invention relates to a method and a device for recovering waste gas containing water-soluble organic compounds. Background technique [0002] Water-soluble organic compound waste gas mainly refers to waste gas containing volatile organic compounds such as alcohols, ketones, esters, ethers, etc. This kind of waste gas is often mixed with air. It is used in printing (coating) industry, organic chemical industry, petroleum In the production process of chemical, pharmaceutical and other industries, a large amount of waste gas of such industrial organic compounds will be discharged, such as industrial waste gas containing ethanol, methanol, acetone, butanone, ethyl acetate, butyl acetate, ethylene glycol ether, etc. For the recovery technology of this type of organic compound waste gas, Chinese patent ZL200610161012.8 discloses a representative method, that is, using activated carbon fiber adsorber to absorb and recover, and then desorb the activated ca...
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Inventor 迟广俊范君
Owner 何金星
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