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Process for regenerating sulfur loading active carbon

A technology of sulfur-loaded activated carbon and activated carbon, which is applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of high activated carbon loss, long regeneration time, large equipment cost, etc., and achieves low activated carbon loss rate and SO2. High concentration and fast heating effect

Inactive Publication Date: 2005-09-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method takes a long time to regenerate, generally 1h to 6h, and the shortest is 0.5h. The heat energy utilization rate is low, the loss of activated carbon is high, and the recovery rate of activated carbon performance after regeneration is low. Due to the operation at high temperature, the material consumption of the regeneration furnace is large; Operating conditions (humidity, time, and the amount of oxidizing gas) must be strictly controlled, and equipment costs are high, etc.

Method used

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  • Process for regenerating sulfur loading active carbon

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Experimental program
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Effect test

Embodiment 1

[0022] Adopt above-mentioned technological process, carrier gas is carbon dioxide gas, adopt flowmeter flow rate, pressure gauge measure pressure, microwave heater is rated output power 1400W (power is adjustable) microwave oven, regenerative reactor is made of quartz glass (height 520mm, Diameter 120mm), the activated carbon that carries out regeneration treatment is charcoal granular activated carbon, with the manganese sulfate [Mn(SO 4 ) 2 ] to impregnate it, the adsorbate is SO 2 , activated carbon on SO 2 The adsorption capacity is 0.41kgSO 2 / kg activated carbon.

[0023] The regeneration process conditions are: carrier gas velocity 0.5m / s, activated carbon volume 138.2g, microwave power 1400W, regeneration time 5min.

[0024] The regeneration rate of activated carbon is 95%, and the SO in the desorbed gas 2 The concentration is 75%.

Embodiment 2

[0026] Using the above-mentioned technological process, the carrier gas is carbon dioxide gas, the flow meter is used to measure the pressure, the pressure gauge is used to measure the pressure, the microwave heater is a microwave oven with a rated output power of 1400W (power adjustable), and the regenerative reactor is made of quartz glass (height 260mm) , diameter 50mm), the active carbon that carries out regeneration treatment is powdered active carbon, with the copper nitrate [Cu(NO 3 ) 2 ] to impregnate it, and the adsorbate is SO 2 , activated carbon on SO 2 The adsorption capacity is 0.38kgSO 2 / kg activated carbon.

[0027] The regeneration process conditions are: carrier gas velocity 0.8m / s, activated carbon amount 50g, microwave power 700W, regeneration time 4min.

[0028] The regeneration rate of activated carbon is 88%, and the SO in the desorbed gas 2 The concentration is 70%.

Embodiment 3

[0030] Using the above process, the carrier gas is carbon dioxide gas, the flow meter is used to measure the pressure, the pressure gauge is used to measure the pressure, the microwave heater is a microwave oven with a rated output power of 200W (power adjustable), and the regenerative reactor is made of quartz glass (260mm high, diameter 50mm), the activity of regeneration treatment is charcoal granular activated carbon, and the adsorbate is SO 2 , activated carbon on SO 2 The adsorption capacity is 0.34kgSO 2 / kg activated carbon.

[0031] The regeneration process conditions are: carrier gas velocity 0.45m / s, activated carbon amount 50g, microwave power 200W, regeneration time 5min.

[0032] The regeneration rate of activated carbon is 86%, and the SO in the desorbed gas 2 The concentration is 70%.

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Abstract

The invention relates to a method for regenerating an activated carbon carried sulfur through microwave heating, which comprises the following steps: the dry and purity carbon dioxide inlets the reactor which is fixed on the top center of the microwave under the controlling press, wherein the controlling desorption regenerating condition is: the ratio of the microwave power and the active carbon quantity is 4-20w / g, the carrier gas pressure is 10-100mmH2O, the carrier gas flow rate is 0.45-0.8m / s, the microwave regenerating time is 2-5 min, the rated frequency of the microwave oven is 915MHz -2450MHz. The sulfur is desorbed in the form of SO2, and the activated carbon can be regenerated, wherein the outlet carrier gas containing 30-90% SO2 can be used as the raw gas to prepare dipping acid.

Description

[0001] (1) Technical field: activated carbon regeneration. (2) Background technology [0002] Due to its unique physical structure and superior adsorption performance, activated carbon is widely used in water treatment, chemical industry and environmental protection and other fields. For a long time, people have conducted a lot of research on the regeneration methods of activated carbon, and proposed various regeneration technologies. At present, the main regeneration methods are: chemical elution method, biological method, wet oxidation method, electrochemical method, heating method, etc. Among them, the heating method has the best effect. New regeneration methods developed in recent years include: high-frequency pulse method, supercritical carbon dioxide method, ultrasonic method, etc. There are three main known regeneration technologies applied to desulfurization activated carbon: high-temperature inert gas regeneration, high-temperature steam pyrolysis regeneration, and w...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/34
Inventor 宁平王学谦陈海堰田森林
Owner KUNMING UNIV OF SCI & TECH