Method for regenerating conductive adsorbent carrying organic matter

Abstract

In a method for regenerating an electrically conducting adsorbent laden with organic substances, the adsorbent is heated by passing electric current through the adsorbent while not passing a flushing gas through the adsorbent. Subsequently, the flushing gas is passed through the adsorbent while not heating the adsorbent by passing electric current through the adsorbent so that the adsorbed organic substances are flushed from the adsorbent and the adsorbent is simultaneously cooled by the flushing gas.

Description

technical field [0001] The present invention relates to a method for regenerating a conductive adsorbent loaded with organic substances. Background technique [0002] The separation of organic gaseous substances from exhaust gas streams by their adsorption on adsorbents, in particular on activated carbon, has been used industrially for many years, for example in solvent recovery on the device. Here mainly solid bed granulate dumps are used as activated carbon. Fibrous activated carbon in the form of cloth mats is rarely used, such as non-woven fabrics, woven fabrics, or braided fabrics, which are rolled into annular adsorbers or sandwiched into frame structures. The whole procedure of waste gas purification by adsorption is generally divided into three main steps: loading step, regeneration step, cooling step. During the loading step, the sorbent is passed through by the exhaust gas to be purified and in the process incorporates organic substances in its internal pore str...

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Problems solved by technology

[0009] Therefore, when the amount of air to be treated is large, in other words, when there are several filter frame assemblies, many distribution pipes (3×the number of filter frames), the distance between the filter frame or a distribution pipe and the filter It must be selected to be very large (0.87m), so that the construction volume of the device will be increased to a very uneconomical level

[0010] In addition, there is another disadvantage: in this electric regeneration method, the heating operation of the desorbed gas is also realized by transferring heat from the electrically heated carbon cloth to the air. In terms of efficiency, there are negative consequences of the above

[0013] Finally, this method also has a disadvantage: that is, the temperature of the activated carbon cloth is difficult to adjust (for the practical application of this method, the adjustment of this temperature is also very important based on safety technology reasons)

Since the carbon cloth is heated from room temperature to, for example, 200°C, it only takes about one minute. In addition, the resistance of activated carbon has a negative temperature coefficient, so in this method, the activated carbon cloth has a great risk of overheating.

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