Catalytic combustion integrated equipment

Equipment use

It is suitable for treating normal temperature, large air volume, medium and low concentration, volatile exhaust gases, and solvent types including benzene, ketones, esters, aldehydes, ethers, alkanes and their mixed gases.

Working Principle

   Firstly, the exhaust gas is removed by the dry filter to remove part of the dust particles, and then the exhaust gas that meets the adsorption conditions is sent to the activated carbon adsorption box for adsorption and purification, and the clean gas after purification is discharged into the atmosphere by the main exhaust fan. The adsorption device is equipped with 1 set of spare adsorption box, when the activated carbon adsorption is saturated, it is switched to catalytic combustion desorption state through the control valve; the desorption system adopts on-line desorption (off-line desorption is also available), i.e., the adsorption process is a continuous treatment process, in the same time when the spare adsorption device is put into use, the saturated adsorption box carries out the desorption work, and the desorption of the activated carbon box after the desorption is ready for next time's cyclic use.

Equipment structure

Catalytic combustion method: it uses catalyst as intermediate to make the gas turn into water and carbon dioxide gas at a lower temperature.

The gas source of the drying room is sent into the purification device through the action of induced draft fan, firstly through the dust and flame arrester system, and then into the heating room, through the heating device, so that the gas reaches the reaction temperature of combustion, and then through the action of catalytic bed, so that the gas decomposes into carbon dioxide and water, and then into the heat exchanger and the heat exchange with the low-temperature gas, so that the temperature of the gas entering the room rises to reach the reaction temperature. If the reaction temperature is not reached, so that the heating system can be achieved through the automatic control system to compensate for the heating, so that it burns, which saves energy, the exhaust gas removal rate of more than in line with the emission standards.

This device consists of host, induced draft fan and electric control cabinet, purification device host by the heat exchanger, catalytic bed, electric heating elements, the device of the flame arrester, etc., the flame arrester dust collector is located in the intake pipe, the device is located at the top of the host, the process flow diagram is as follows:

Direct discharge port: the exhaust gas source should be left with direct discharge pipeline, controlled by a valve, so that the exhaust gas is directly discharged (e.g., when the purification device is overhauled).

Flame arrestor: It is composed of multi-layer metal mesh, which can prevent the flame from passing through and filter out the larger particles (dirt) in the gas, and is one of the devices of this purification device.
Heat exchanger: Plate heat exchanger structure, its role is to use the heat released by the catalytic reaction, heating exhaust gas, improve the thermal energy utilisation rate and reduce the heating power.

Preheating chamber: the exhaust gas is preheated by the burner plus heat exchanger to increase the temperature of the intake gas to reach the catalytic reaction conditions.

RTD: Stainless steel protection tube is used to measure the inlet gas heating temperature and purification temperature.

Catalytic bed: composed of multi-layer honeycomb catalyst, the core of this device.

Diaphragm pressure relief type: When the equipment operation is abnormal, it can be cracked and relieved in time to prevent accidents from occurring.

Blower: adopts rear induced air type to make the device work under negative pressure.

Valve: control and adjust the size of gas flow.

Product features

1. Adsorption and concentration + catalytic oxidation combination process, the entire system to achieve the purification, desorption process closed loop, compared with the recycling class of exhaust gas purification devices, without the need to prepare compressed air and steam and other additional energy, the operation process does not produce secondary pollution, equipment investment and operating costs are low.

2. The front end adopts dry dust filtration device, purification, adsorption device life.

3. Use moulded honeycomb activated carbon as adsorption material, long adsorbent life, low resistance of adsorption system, purification;

4. Use honeycomb ceramics impregnated with precious metals palladium and platinum as catalysts, catalytic purification rate reaches above, long catalyst life, low decomposition temperature of exhaust gas, short preheating time for desorption, low energy consumption.

5. Adsorption of waste gas activated carbon adsorption bed, can be recycled after the catalytic combustion of hot gas for desorption, desorption of the gas and then sent to the catalytic combustion chamber for purification, when the concentration of waste gas reaches more than 2,000PPM, it can be maintained when the spontaneous combustion. There is no need to add energy, low operating costs, energy saving effect is remarkable.

6. Adopting microcomputer centralised control system, the equipment running and operation process is fully automated, stable and running process.

7. complete facilities, set valves between the gas source and equipment, strictly control the desorption temperature into the activated carbon bed during desorption, with flame arrestors, temperature sensing rods, ports, alarms and automatic shutdown and other protective measures.