JPH0319934Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is based on the invention that organic solvents contained in exhaust gas are
The present invention relates to a gas adsorption device that makes it possible to recover adsorption heat generated when gas is adsorbed by a gas adsorbent using a heat pump cycle and utilize it as an energy source required during desorption.

Conventionally, organic and inorganic compounds (substances to be adsorbed in gas adsorption) contained in various types of exhaust gas have been recovered and regenerated using adsorbents such as activated carbon. Focusing on the drawback that when adsorbing a high-temperature solvent gas, heat of adsorption is generated, the temperature of the adsorbent increases, and the adsorption performance decreases, the present invention removes this heat of adsorption and Improvements have been made to stabilize adsorption performance by preventing the temperature of the adsorbent from rising, and to make effective use of it by recovering the heat removed from the adsorbent and reusing it as the thermal energy required for desorption. This is what I did.

When recovering the heat of adsorption, the temperature difference between the temperature of the adsorbent on the heat generating side and the heat medium on the heat receiving side is generally not stable, and even if the difference is not very large, the heat can be effectively transferred. Replacement equipment needs to be selected.

On the other hand, the liquid film falling type heat exchanger is effective even when the temperature difference between the heat generating side and the heat receiving side is small, as shown in Utility Application No. 57-58739, an earlier application by the present inventors. Since it has the characteristic that heat transfer occurs, this is introduced into the present invention, and the shell side of the heat exchanger is filled with an adsorbent to perform gas adsorption, and the working medium such as fluorocarbon or ammonia is transferred to the heat exchanger. The medium vapor generated by heat exchange by flowing into the heat tube side forms a heat cycle.

Embodiments of the present invention will be described with reference to the accompanying drawings. Reference numerals 1 and 1' are a pair of liquid film flowing heat exchangers installed in parallel in order to carry out gas adsorption batchwise in the present invention. Heat tube shell side 2,
2', that is, the outside of the heat transfer tube, is filled with granular activated carbon or the like to form adsorption layers 3, 3'. (The area of the adsorption layer is indicated by an x mark in the figure) Therefore, a fan 4 and feed pipes 5 and 5' for feeding the raw gas to be adsorbed to the shell side are arranged below the exchanger. , and its delivery pipes 6, 6' are disposed at the top.

Next, the heat exchanger tube inner side 7 of the heat exchanger is a heat exchanger tube,
A liquid working medium cycle is formed by a working medium receiving section 8, 8' below and from there via a pump 9, 9' and a pipe 10, 10' leading to the top of the exchanger. Furthermore, a cycle for the evaporated working medium, ie medium vapor, is formed in the heat pump cycle a. This is carried out via pipes 11, 11' emerging from the steam area above the liquid receiving part, such as a turbo compressor 12, etc.
The route is to a device for increasing the enthalpy of the steam, then through a condenser 13 and back to the original heat exchanger in a tube 14.

The aforementioned condenser 13 is configured to absorb solvents, etc. adsorbed by the adsorbent.
This is in the regeneration route b of the adsorbed material, and this regeneration route passes through the heat exchanger 16 and the condenser 17 to the regeneration receiving tank through the pipes 15 and 15' coming out from the lower part of the heat exchanger tube shell side. Reaching 18. The tubes 19 from the tank also pass through a desorption blower 20, through a pre-heat exchanger 16, a condenser 13 and an auxiliary steam heat exchanger 21 into the upper shell side of the tube section.

In the above embodiments, the falling liquid film heat exchanger is described as a tube type heat exchanger, but it may be a flat type heat exchanger, and is not limited to the embodiments. Further, the use of a heat pump cycle that uses working medium vapor is not limited to an energy source for desorption, but can also be used as an air conditioning or general heating source.

[Brief explanation of the drawing]

FIG. 1 is a process diagram showing the configuration of the present invention. In the figure, 1, 1'...Liquid film falling type heat exchanger, 2,
2'... Shell side of the heat transfer tube of the same exchanger, 3, 3'...
... Adsorbent packed bed, 10, 10' ... Working medium circulation pipe, 12 ... Mechanical compressor, 18 ... Regeneration tank, a
...Heat pump cycle, b...Regeneration route.

Claims (1)

[Scope of utility model registration request] A gas adsorbent is filled in the heat transfer tube shell side of a liquid film falling heat exchanger to create a gas adsorption layer, while a working medium such as fluorocarbon or ammonia is allowed to flow down into the heat transfer tube side of the heat exchanger. , the working medium exchanges heat with the adsorption heat generated when the gas is adsorbed by the gas adsorbent as it flows down, and the vapor of the working medium thus generated is heated and pressurized by a mechanical compressor, and is used in a heat pump cycle. A gas adsorption device characterized in that the gas adsorption device is configured to form.