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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: 2009-02-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
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  • 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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Effect test

Embodiment 1

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

[0019] The regeneration process is: use 200°C superheated steam as the regeneration steam, and the volume flow rate of the regeneration steam is 10h -1 After 20 minutes, the regeneration steam is stopped, and the circulation fan is turned on at the same time, and the steam circulation cooling process is carried out. A water purification spraying device is installed on the circulating steam pipeline. After the circulating steam passes through the water purifying spraying device, the temperature drops by 2 to 10°C. After 30 minutes, the temperature of the bed of activated carbon adsorbent drops to 120°C. At this time, the circulating steam is stopped and the The air is further cooled and dried for 20 minute...

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 regenerated by the method of the present invention after adsorption and saturation.

[0022] The regeneration process is: use 120°C superheated steam as the regeneration steam, and the volume flow rate of the regeneration steam is 20h -1 After 10 minutes, use 250°C steam, and stop the regenerative steam after 30 minutes of steam at 250°C, and turn on the circulation fan at the same time to perform steam circulation cooling treatment. A water purification spray device is installed on the circulating steam pipeline. After the circulating steam passes through the water purification spray device, the temperature drops by 1 to 15°C. The cooling speed is faster first, and then the cooling speed is slower. After 50 minutes, the temperatu...

Embodiment 3

[0024] In the activated carbon adsorption treatment process of 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 regenerated by the method of the present invention after the adsorption is saturated.

[0025] The regeneration process is: use 140°C superheated steam as the regeneration steam, and the volume flow rate of the regeneration steam is 30h -1 , Use 350°C steam after 20 minutes, stop the regeneration steam after 50 minutes of steam at 350°C, and turn on the circulation fan at the same time to perform steam circulation cooling treatment. A water purification spray device is installed on the circulating steam pipeline. After the circulating steam passes through the water purification spray device, the temperature drops by 2-40°C. The cooling speed is faster first, and then the cooling speed is slower. After 40 minutes, the temperature of the activated carbon adsorbent bed layer drops To 130...

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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 has strong adsorption capacity for various organic and inorganic substances, so it is widely used in the adsorption and purification treatment process of various waste gases and waste water, as well as the separation treatment process of some mixtures, such as hydrocarbon-containing Adsorption and purification of exhaust gas, adsorption and purification of exhaust gas containing sulfur compounds, adsorption and purification of oily sewage, etc. [0003] CN1334313A, CN1522785A etc. adopt the method for activated carbon adsorption to recover oil and gas. CN1334313A adopts an absorption-adsorption combined process to recover oil and gas, first recovering part of the oil and gas through absorption, and then further recov...

Claims

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Application Information

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