Energy-saving efficient adsorption and desorption combined system

Abstract

The invention relates to an energy-saving efficient adsorption and desorption combined system which is characterized in that (1) an adsorption bed is provided with a hollow active carbon clapboard which is communicated with hollow side walls; and the two hollow side walls are respectively provided with a hot air inlet and a hot air outlet; and (2) a catalyst bed body of a catalytic combustion bed is sequentially provided with a catalyst electric heater, an air distributing plate and a catalytic bed layer from top to bottom; a first air outlet of the catalytic combustion bed is connected with a first air inlet of a mixed flow heat exchanger through a pipeline; a second air outlet of the catalytic combustion bed is connected with the hot air inlet of the hollow side wall of the adsorption bed through an adsorption bed heating fan; the air outlet of a fresh air mixed flow fan is connected with a second air inlet of the mixed flow heat exchanger; and the air outlet of a desorption circulating fan is connected with the air inlet of the catalytic combustion bed through a second flame damper. The system is simple and reasonable in structure, and safe and reliable; and moreover, the system has the advantages that the energy consumption is effectively reduce, the purifying rate is improved, the time of a desorption process is shortened, the purifying efficiency is improved, and the operation cost is lowered.

Description

technical field [0001] The invention belongs to the field of organic pollutant purification systems, in particular to an energy-saving, high-efficiency adsorption and desorption combined system. Background technique [0002] The purification system in the prior art includes a filter, a first flame arrester, an adsorption bed, an adsorption main fan, a catalytic combustion bed, a mixed flow heat exchanger, a fresh air mixed flow fan, a desorption electric heater and a desorption circulation fan, a filter, The flame arrester, the adsorption bed and the main adsorption fan are connected sequentially through pipelines, and the air outlet of the mixed flow heat exchanger is connected to the desorption circulation fan through the desorption electric heater and the adsorption bed. Although this existing system can realize the treatment of industrial volatile organic pollutants with large air volume and low concentration, there are the following problems: 1. Since the air after the ...

AI Technical Summary

Problems solved by technology

Although this existing system can realize the treatment of industrial volatile organic pollutants with large air volume and low concentration, there are the following problems: 1. Since the air after the desorption electric heater is heated enters the adsorption bed, it will affect the adsorbent and adsorbate And the metal structure of the adsorption bed is heated at the same time, so that the metal structure of the adsorption bed consumes part of the heat energy, thus prolonging the desorption time and reducing the desorption efficiency, especially in winter in the north, the loss of heat energy is greater, and the desorption time is longer. , if the waste heat generated by catalytic combustion is not fully utilized, it will also increase the thermal pollution of the atmospheric environment; 2. The purification rate of the catalytic combustion bed is low, and the service life of the catalyst is short. The reason is that industrial volatile organic pollutants are produced from The bottom enters the catalytic combustion bed in the prior art and is discharged from the top. The catalytic combustion in the lower layer heats the upper catalytic bed, so the upper area of ​​the overall catalytic bed tends to exceed its allowable working temperature due to heat energy accumulation, causing the catalyst to lose In addition, the natural convection direction of the catalytic combustion process of industrial volatile organic pollutants is from bottom to top. When passing through the catalytic combustion bed, the exhaust gas begins to rise at an accelerated rate, resulting in exhaust gas and catalytic combustion bed. The contact time is reduced, resulting in a lower decontamination rate

Images