WO2021077985A1 - Skid-mounted waste gas treatment device combining activated carbon adsorption and catalytic combustion - Google Patents

Abstract

Disclosed is a skid-mounted waste gas treatment device combining activated carbon adsorption and catalytic combustion, comprising a catalytic combustion unit and an activated carbon adsorption unit, the catalytic combustion unit comprising a base, a desorption fan, a catalytic combustion device and a supplemental cooling fan; an air intake end of the desorption fan is connected to an air intake pipe having an air inlet, the air inlet communicating with an air outlet end of the activated carbon adsorption unit by means of a pipe; an air outlet end of the desorption fan communicates with an air intake end of the catalytic combustion device by means of an air outlet pipe; an air outlet end of the catalytic combustion device is connected to a desorption gas pipe having an air outlet, the air outlet communicating with an air intake end of the activated carbon adsorption unit by means of a pipe; and an air outlet end of the supplemental cooling fan communicates with the desorption gas pipe by means of a supplemental cooling air pipe. A waste gas treatment device which uses the described structure may not only automatically control the temperature and desorption time, but the catalytic combustion unit also has an integrated structure, thus reducing the difficulty of on-site construction, improving construction quality and accelerating construction progress.

Description

Skid-mounted activated carbon adsorption and catalytic combustion combination exhaust gas treatment device Technical field

The invention relates to the technical field of environmentally friendly waste gas treatment, in particular to a skid-mounted activated carbon adsorption and catalytic combustion combination waste gas treatment device.

Background technique

With the development of economy, more and more organic waste gas is produced in the production process of manufacturing and processing enterprises, and there are many kinds of organic waste gas. At present, the traditional methods used to treat organic waste gas at home and abroad are: direct combustion, catalytic combustion, adsorption, biological purification, low-temperature plasma, and photocatalytic oxidation. The above methods have their own merits. At present, the traditional organic waste gas treatment process adopts activated carbon adsorption + catalytic combustion method for treatment.

Direct combustion is suitable for combustible gases with high concentration and small gas volume; however, the equipment is prone to corrosion, operation and maintenance and treatment costs are high, and secondary pollution is easy to form. Catalytic combustion method, under the action of a catalyst, makes the hydrocarbons in the organic waste gas rapidly oxidize into water and carbon dioxide under the condition of low temperature; but the catalyst is easy to be poisoned and the input cost is high. The biological purification method uses microorganisms to decompose the pollutants in the exhaust gas into less or even harmless substances; but the purification equipment occupies a large area and has requirements for the pH in the adjustment tank. The low-temperature plasma reacts with organic waste gas by producing particles rich in extremely high chemical activity, and converts it into carbon dioxide and water; however, the one-time investment is relatively high and there is a certain safety hazard. Photocatalytic oxidation uses a special ultraviolet band under the action of a special catalytic oxidant to break the exhaust gas molecules and further redox; but it is easy to produce high concentrations of ozone and pollute the surrounding environment.

The adsorption method uses adsorbents to adsorb organic waste gas, with high purification efficiency and low cost. At present, most of the organic waste gas treatment is carried out by adsorption method, which is also a traditional treatment method. The commonly used adsorbent is activated carbon; but after the activated carbon is saturated, it needs to be desorbed and regenerated before it can be used.

At present, a single treatment method can no longer meet the requirements of environmental protection and continuous treatment. Therefore, the combination of adsorption method + catalytic combustion is often used to treat exhaust gas to ensure that the exhaust gas treatment device can be used continuously. For this type of exhaust gas treatment device, all parts, ducts, valves, fans and other spare parts are now sent to the site and assembled on site. Due to the frequent adjustments and changes to the site layout, the ducts need to be increased or decreased, and the ducts are all Insulation pipes are very difficult to adjust on site, and it is difficult to ensure product quality, which brings a lot of inconvenience to on-site installation.

technical problem

In view of this, the purpose of the present invention is to provide a skid-mounted activated carbon adsorption and catalytic combustion exhaust gas treatment device, which can not only automatically control the temperature and desorption time, but also solve the problem of on-site assembly of various components and reduce the difficulty of on-site construction. , Improve construction quality and speed up construction progress.

Technical solutions

The present invention solves the above problems through the following technical means: a skid-mounted activated carbon adsorption and catalytic combustion exhaust gas treatment device, including a catalytic combustion unit and an activated carbon adsorption unit, the catalytic combustion unit includes a base and equipment fixedly mounted on the base The main body of the equipment includes a desorption fan, a catalytic combustion device and a supplemental cooling fan. The air inlet end of the desorption fan is connected with an air inlet duct with an air inlet, and one end of the air inlet duct connected with the desorption fan An electric air valve B is provided, the air inlet is communicated with the air outlet of the activated carbon adsorption unit through a pipe, and the air outlet of the desorption fan communicates with the air inlet of the catalytic combustion device through an air outlet pipe, and the air outlet pipe is connected to the air outlet of the catalytic combustion device. An air inlet flame arrestor is provided at one end of the combustion device; the air outlet end of the catalytic combustion device is connected with a desorption gas pipe with an outlet, and the desorption gas pipe is connected with a discharge pipe with a discharge port. The pipe is provided with an electric air valve A, and an air outlet flame arrestor is provided at one end of the desorption gas pipe connected to the catalytic combustion device, and the air outlet is connected to the air inlet end of the activated carbon adsorption unit through the pipe; The air outlet end is connected with the desorption gas pipeline through the supplemental cold air pipeline, and an electric air valve C is provided at the end where the supplementary cold air pipeline and the desorption gas pipeline are connected.

Further, the air inlet branch pipe extends from the air inlet pipe, and a fresh air valve is provided on the air inlet branch pipe.

Further, the supplementary air cooling pipe is connected to the discharge port through the supplementary cooling air branch pipe, and an electric air valve D is provided on the supplementary cooling air branch pipe.

Further, the air outlet end of the desorption fan is respectively connected with the air outlet pipe and the air outlet branch pipe through a three-way connection, and an electric air valve F is arranged on the air outlet branch pipe, and an electric air valve E is arranged on the desorption air pipe.

Further, a temperature detection A is provided on the air inlet pipe, and a temperature detection B is provided on the desorption gas pipe between the electric damper E and the outlet end of the catalytic combustion device. The desorption between the air outlet and the electric damper E is A temperature detection C is provided on the attached gas pipeline.

Beneficial effect

The beneficial effects of the present invention: the skid-mounted activated carbon adsorption and catalytic combustion exhaust gas treatment device of the present application includes a catalytic combustion unit and an activated carbon adsorption unit. The catalytic combustion unit includes a base and an equipment body fixedly mounted on the base. The main body of the equipment includes a desorption fan, a catalytic combustion device and a supplemental cooling fan. The air inlet end of the desorption fan is connected with an air inlet duct with an air inlet, and the end of the air inlet duct connected with the desorption fan is provided with an electric motor. Air valve B, the air inlet is communicated with the outlet end of the activated carbon adsorption unit through a pipe, the outlet end of the desorption fan is communicated with the inlet end of the catalytic combustion device through the outlet pipe, and the outlet pipe is connected with the catalytic combustion device One end of the catalytic combustion device is provided with an air inlet flame arrestor; the air outlet end of the catalytic combustion device is connected with a desorption gas pipe with an outlet, and the desorption gas pipe is connected with a discharge pipe with a discharge port, and the discharge pipe is provided There is an electric air valve A, an air outlet flame arrestor is provided at one end of the desorption gas pipeline connected to the catalytic combustion device, and the air outlet communicates with the air inlet end of the activated carbon adsorption unit through the pipeline; the air outlet end of the supplemental cooling fan The supplemental cold air pipeline is connected with the desorption gas pipeline, and an electric air valve C is provided at one end of the supplementary cold air pipeline and the desorption gas pipeline. The exhaust gas treatment device adopting this structure can not only automatically control the temperature and desorption time, but also the catalytic combustion unit is an integrated structure, which reduces the difficulty of on-site construction, improves the construction quality and speeds up the construction progress. More specifically, the advantages of this application are embodied in the following aspects.

1. The present invention can be easily modified and realized on the basis of the original activated carbon adsorption system; the organic waste gas efficiency is high (up to 90% or more).

2. The whole set of equipment is simple to run, and the operating cost is low. The initial investment is not much different from the installation of the catalytic combustion system on site. This structure method is convenient for control and operation, and will not affect the dust capture effect of the entire system.

3. No additional piping is added. It is manufactured and installed in the factory before leaving the factory. The inlet, outlet and discharge ports of the desorption system are reserved, which saves on-site installation time and costs, and also solves on-site rectification caused by design or production deviations. The overall appearance is good-looking, that is, the overall cost saving is about 10-20%.

4. The ability to remove exhaust gas can also meet the emission requirements of the atmosphere, which can meet the increasingly stringent environmental protection requirements in the future.

5. Due to its unique structure design, the device has mature and stable technology, simple operation and high purification efficiency, and can be used in most activated carbon desorption systems.

Description of the drawings

The present invention will be further described below in conjunction with the drawings and embodiments.

Figure 1 is an overall schematic diagram of the present invention.

Figure 2 is a front view of a catalytic combustion unit.

Figure 3 is a top view of a catalytic combustion unit.

Figure 4 is a left side view of the catalytic combustion unit.

Fig. 5 is a top cross-sectional view of the catalytic combustion unit.

Figure 6 is a left cross-sectional view of the catalytic combustion unit.

Embodiments of the present invention

Hereinafter, the present invention will be further described in detail through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present invention will become clearer. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

As shown in Figure 1-6, a skid-mounted activated carbon adsorption and catalytic combustion exhaust gas treatment device, including a catalytic combustion unit A and an activated carbon adsorption unit B, the catalytic combustion unit includes a base 1 and fixedly mounted on the base The main body of the device.

The main body of the equipment includes a desorption fan 10, a catalytic combustion device 3, and a supplemental cooling fan 14. The air inlet end of the desorption fan 10 is connected with an air inlet duct with an air inlet 6, and the air inlet duct is connected to the desorption fan. An electric air valve B13 is provided at one end connected to 10, which is used to control the conduction of the air inlet pipe. The air inlet 6 communicates with the air outlet end of the activated carbon adsorption unit through the pipe. The air outlet end of the desorption fan 10 communicates with the air inlet end of the catalytic combustion device 3 through an air outlet pipe, and an air inlet flame arrestor 2 is provided at the end of the air outlet pipe connected to the catalytic combustion device 3. The air outlet end is connected to a desorption gas pipe with an air outlet 19, the desorption gas pipe is connected to a discharge pipe with a discharge port 8, the discharge pipe is provided with an electric air valve A7, and the electric air valve A17 is opened. The combusted gas and water are discharged through the discharge port 8. An air outlet flame arrestor 4 is provided at one end of the desorption gas pipeline connected to the catalytic combustion device 3, and the air outlet 19 communicates with the air inlet end of the activated carbon adsorption unit through the pipeline. The air inlet flame arrestor 2 and the air outlet flame arrestor 4 both filter the spark particles (>1 mm) during the combustion process through a metal filter plate, and then enter the next process through the pipeline to avoid fire. In the specific working process, under the pumping action of the desorption fan 10, the air inlet sends the high-concentration exhaust gas parsed by the activated carbon to the catalytic combustion device. In the catalytic combustion device, the high-concentration exhaust gas undergoes oxidation reaction and becomes harmless water. And carbon dioxide, and at the same time produce high-temperature desorption gas. The high-temperature desorption gas is sent to the activated carbon equipment through the air outlet to perform high-temperature analysis, desorption and regeneration of the activated carbon, so that the activated carbon can recover its adsorption capacity.

The air outlet end of the supplemental cooling fan 14 is connected to the desorption gas pipeline through the supplementary cold air pipeline, and an electric air valve C16 is provided at the end where the supplementary cold air pipeline and the desorption gas pipeline are connected. Blow supplementary cold air to adjust the temperature of the desorption gas, and close the electric air valve C16 to stop blowing supplementary cold air into the desorption gas pipeline.

The supplementary air cooling pipeline is connected to the discharge port through the supplementary cooling air branch pipe, and an electric air valve D17 is provided on the supplementary cooling air branch pipe. When the supplemental cooling fan is started, part of the airflow flows into the supplementary cooling air branch pipe, which can improve the discharge capacity of the discharge port 8. At the same time, when the discharge port is connected with the main pipe of the adsorption system, fresh air can be sent to the main pipe of the activated carbon adsorption system to prevent exhaust gas deposition Cause the exhaust gas concentration to exceed the lower explosion limit and bring safety risks.

The air inlet pipe extends out of the air inlet branch pipe, and the air inlet branch pipe is provided with a fresh air valve 12; the air outlet end of the desorption fan is connected to the air outlet pipe and the air outlet branch pipe through the three links 11, and the air outlet branch pipe An electric damper F20 is provided on the upper side, and an electric damper E18 is provided on the desorption gas pipeline. In the specific work process, when the air inlet 6 stops air intake, open the fresh air valve 12 to allow air to flow in from the air inlet branch pipe, and at the same time open the electric air valve F20, and adjust the electric air valve E to reverse the air flow in the desorption air pipe In this way, under the action of the desorption fan, the air flows into the desorption air pipe through the air outlet branch pipe, and the catalytic combustion unit can be blown back and cleaned. Preferably, a valve guard is provided at the fresh air valve to prevent foreign matter from entering the equipment pipeline.

A temperature detection A15 is provided on the air inlet pipe, and the temperature detection A is used to detect the temperature of the inlet air; a temperature detection B5 and a temperature detection B5 are provided on the desorption gas pipe between the electric damper E and the air outlet of the catalytic combustion device To detect the exhaust gas temperature and the desorption gas temperature; a temperature detection C9 is provided on the desorption gas pipeline between the air outlet and the electric damper E, and the temperature detection C is used to detect the desorption gas temperature.

In summary, with the exhaust gas treatment device, on the one hand, the catalytic combustion unit is an integrated structure with compact structure, complete functions, and convenient installation, which reduces the difficulty of on-site construction, improves construction quality and speeds up construction progress; on the other hand, On the one hand, it has realized automatic desorption, adsorption, etc., can automatically control temperature and desorption time, and ensure the efficiency and effect of waste gas treatment.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out. Modifications or equivalent replacements without departing from the purpose and scope of the technical solution of the present invention should be covered by the scope of the claims of the present invention.

Claims (5)

1. A skid-mounted activated carbon adsorption and catalytic combustion exhaust gas treatment device is characterized in that it comprises a catalytic combustion unit and an activated carbon adsorption unit. The catalytic combustion unit includes a base and an equipment body fixedly mounted on the base. It includes a desorption fan, a catalytic combustion device and a supplemental cooling fan. The air inlet end of the desorption fan is connected with an air inlet pipe with an air inlet, and the end of the air inlet pipe connected with the desorption fan is provided with an electric air valve B The air inlet is communicated with the air outlet end of the activated carbon adsorption unit through a pipe, the air outlet end of the desorption fan is communicated with the air inlet end of the catalytic combustion device through an air outlet pipe, and the end of the air outlet pipe connected to the catalytic combustion device is provided There is an air inlet flame arrestor; the air outlet end of the catalytic combustion device is connected with a desorption gas pipe with an outlet, and the desorption gas pipe is connected with a discharge pipe with a discharge port, and the discharge pipe is provided with an electric air Valve A is provided with an air outlet flame arrestor at one end of the desorption gas pipeline connected to the catalytic combustion device, the air outlet communicates with the air inlet end of the activated carbon adsorption unit through the pipeline; the air outlet end of the supplemental cooling fan passes through the supplemental cooling air The pipeline is connected with the desorption gas pipeline, and an electric air valve C is provided at one end of the supplementary cooling air pipeline and the desorption gas pipeline.
2. The skid-mounted activated carbon adsorption and catalytic combustion exhaust gas treatment device according to claim 1, wherein the air inlet pipe extends from the air inlet branch pipe, and a fresh air valve is provided on the air inlet branch pipe.
3. The skid-mounted activated carbon adsorption and catalytic combustion exhaust gas treatment device according to claim 2, wherein the supplemental air cooling pipe is connected to the discharge port through a supplementary cooling air branch pipe, and an electric air valve is provided on the supplementary cooling air branch pipe D.
4. The skid-mounted activated carbon adsorption and catalytic combustion exhaust gas treatment device according to claim 3, characterized in that: the air outlet end of the desorption fan is connected to the air outlet pipe and the air outlet branch pipe through a three-way connection, and the air outlet branch pipe An electric damper F is provided on the upper side, and an electric damper E is provided on the desorption gas pipeline.
5. The skid-mounted activated carbon adsorption and catalytic combustion exhaust gas treatment device according to claim 4, characterized in that: a temperature detection A is provided on the air inlet pipe, and a temperature detection A is provided between the electric air valve E and the air outlet end of the catalytic combustion device A temperature detection B is provided on the desorption gas pipeline of, and a temperature detection C is provided on the desorption gas pipeline between the air outlet and the electric damper E.