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Regeneration method of active carbon absorbent

A technology of activated carbon adsorption and activated carbon, which is applied in separation methods, filter regeneration, filtration separation, etc., can solve the problems of increased operating cost of activated carbon regeneration, reduced process economy, safety accidents, etc., to reduce steam or nitrogen consumption, easy to control , The effect of reducing operating costs

Active Publication Date: 2010-05-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the steam regeneration process, it is generally necessary to lower the temperature of the activated carbon bed to a certain level, and then dry it with air. Direct air drying at high temperature is prone to safety accidents
Nitrogen or low-temperature steam is generally used in the cooling process of the activated carbon bed, but the price of nitrogen and steam is high, which increases the operating cost of activated carbon regeneration and reduces the economy of the entire process

Method used

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  • Regeneration method of active carbon absorbent
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Embodiment 1

[0018] In a certain light oil storage tank, the concentration of oil and gas in the exhaust gas is 10%(v)-45%(v), which adopts activated carbon adsorption and recovery treatment, and the method of the invention is used for regeneration after the adsorption is saturated.

[0019] The regeneration process is: use 200℃ superheated steam as regeneration steam, and the volume flow of regeneration steam is 10h -1 , After 20 minutes, stop the regeneration steam, and turn on the circulation fan at the same time to perform steam circulation cooling treatment. The circulating steam pipeline is equipped with a water purification spray device. After the circulating steam passes through the water purification spray device, the temperature is reduced by 2 to 10°C. After 30 minutes, the temperature of the activated carbon adsorbent bed is reduced to 120°C. At this time, the circulating steam is stopped, and the The air is further cooled and dried for 20 minutes, and then the air is stopped for u...

Embodiment 2

[0021] Activated carbon adsorption treatment process of certain sulfur (containing hydrogen sulfide and organic sulfur) and hydrocarbon waste gas, the sulfur content is 5-40mg / m 3 , The hydrocarbon content is 120-900 μL / L, and the activated carbon is adsorbed and saturated by adopting the method for regeneration.

[0022] The regeneration process is: use 120℃ superheated steam as regeneration steam, and the volume flow of regeneration steam is 20h -1 , After 10 minutes, use 250°C steam. After 250°C steam is passed for 30 minutes, stop the regeneration steam. At the same time, turn on the circulating fan to perform steam cycle cooling treatment. The circulating steam pipeline is equipped with a water purification spray device. After the circulating steam passes through the water purification spray device, the temperature is reduced by 1 to 15°C. The cooling rate is faster first, and then the cooling rate is slower. After 50 minutes, the temperature of the activated carbon adsorbent ...

Embodiment 3

[0024] In the activated carbon adsorption treatment process of a certain oily sewage, the sulfur content in the sewage is 2-20 μg / g, the COD (chromium method) is 90-300, and the activated carbon is saturated with adsorption and then regenerated by the method of the present invention.

[0025] The regeneration process is: use 140℃ superheated steam as regeneration steam, and the volume flow of regeneration steam is 30h -1 After 20 minutes, use 350°C steam, and after 50 minutes of 350°C steam, stop the regeneration steam, and turn on the circulating fan to perform steam cycle cooling treatment. The circulating steam pipeline is equipped with a water purification spray device. After the circulating steam passes through the water purification spray device, the temperature is reduced by 2~40℃. The cooling rate is faster first, and then the cooling rate is slower. After 40 minutes, the temperature of the activated carbon adsorbent bed decreases. When it reaches 130°C, stop circulating s...

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Abstract

The invention discloses a regeneration method of an activated carbon absorbent. The activated carbon absorbent with absorption saturation is treated by adopting a steam regeneration method; at the time when the regeneration of the steam is stopped, circulative steam is formed between the entrance and the exist of an absorbing apparatus; a purified water spraying device is arranged on a steam circulating pipe; the circulative steam is cooled off after passing through the purified water spraying device; the circulative steam with lowered temperature is utilized for carrying out cooling processing to an activated carbon bed; and the cooled activated carbon absorbent can be further dried by feeding air. In the regeneration method of the activated carbon absorbent, the adoption of steam regeneration causes that comparatively thorough regeneration of absorption capacity can be carried out under higher temperature, thereby greatly reducing the steam or nitrogen needed by the existing temperature reduction method, greatly lowering operational cost and improving the economic performance of the activated carbon absorption technology.

Description

Technical field [0001] The invention relates to a regeneration method of activated carbon adsorbent, in particular to a steam regeneration method of activated carbon adsorbent. Background technique [0002] Activated carbon has a large specific surface area and strong adsorption capacity for a variety of organic and inorganic substances. Therefore, it is widely used in the adsorption and purification process of various waste gas and wastewater, as well as the separation process of some mixtures, such as hydrocarbons. Adsorption purification of exhaust gas, adsorption purification of sulfur-containing compound exhaust gas, adsorption purification of oily sewage, etc. [0003] CN1334313A, CN1522785A, etc. adopt activated carbon adsorption method to recover oil and gas. CN1334313A adopts absorption-adsorption combined process to recover oil and gas, first recovering part of the oil and gas through absorption, and then further recovering oil and gas through adsorption. CN1522785A com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/34
Inventor 刘忠生方向晨郭兵兵王有华
Owner CHINA PETROLEUM & CHEM CORP