CN218608712U

CN218608712U - VOC catalytic combustion and adsorption desorption device

Info

Publication number: CN218608712U
Application number: CN202223186078.6U
Authority: CN
Inventors: 高攀峰; 谢筠
Original assignee: China Catalyst Xiamen Environmental Technology Co ltd
Current assignee: China Catalyst Xiamen Environmental Technology Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-03-14
Anticipated expiration: 2032-11-30

Abstract

The utility model provides a VOC catalytic combustion and adsorption desorption device, which comprises a sample introduction box, a catalytic heater, a heat exchanger, a suction/desorption box and a collecting box, wherein the sample introduction box is provided with an air inlet and an air outlet; the gas outlet of the sample inlet box is connected with the gas inlet of the catalytic heater through a second vent pipe, the second vent pipe is further connected with a third vent pipe, a ventilation valve is arranged on the third vent pipe, the gas inlets of the heat exchanger and the adsorption/desorption box are connected with the gas outlet of the catalytic heater through a three-way pipeline, the gas outlets of the heat exchanger and the adsorption/desorption box are connected with the gas inlet of the collecting box through another three-way pipeline, and the front ends of the gas inlets and the rear ends of the gas outlets of the heat exchanger and the adsorption/desorption box are provided with ventilation valves. The catalytic combustion, adsorption and desorption functions are integrated, and the actual requirements of a laboratory are met.

Description

VOC catalytic combustion and adsorption desorption device

Technical Field

The utility model relates to a VOC (volatile organic compound) processing field, concretely relates to VOC catalytic combustion and adsorption desorption device.

Background

The atmospheric pollutants comprise particulate matters and gaseous substances, wherein the gaseous pollutants account for the main part, the gaseous pollutants are divided into inorganic pollutants and organic pollutants, the organic pollutants account for the majority in terms of types, and the treatment of organic waste gas is an important part in atmospheric pollution treatment.

The VOC is an abbreviation of volatile organic compounds, which mainly comprises substances such as alkanes, alkenes, aromatic hydrocarbons, aldehydes or ketones, etc., has special odor irritation and extremely strong volatility, and is a source of VOC generation in automobile exhaust, heavy metal smelting, automobile body coating, various house coatings, etc., and the influence of pollutants on the environment is huge. Because the components of the compounds are complex, the discharge amount is extremely large, and the treatment difficulty is higher. Therefore, the compounds need to be effectively treated, and can be controlled within a reasonable range, so that the pollution to the environment is reduced, and the environment quality is improved. The treatment technology for volatile organic compounds includes adsorption method, catalytic combustion method, condensation method, absorption method, membrane separation method, biochemical method, low-temperature plasma method, photocatalytic oxidation method and direct combustion method.

The catalytic combustion method can treat the VOC with medium and low concentration, realize catalytic oxidation at relatively low temperature, reduce energy consumption and reduce the emission of secondary pollutants. The adsorption method is characterized in that harmful substances in organic waste gas are adsorbed to the surface of the organic waste gas through physical properties by using objects with large specific surface area and developed void structures such as activated carbon, the adsorbing materials do not adsorb the harmful substances after adsorption saturation, the harmful substances adsorbed to the adsorbing materials are desorbed through hot air and then are treated in a centralized manner, and the adsorbing materials are regenerated and can be used for adsorption again. These two methods have become the most important technologies for eliminating VOCs.

At present, various environmental protection companies are dedicated to research and develop novel catalytic combustion materials and adsorption materials, and as shown in a catalytic combustion VOC waste gas treatment device disclosed in patent No. CN217773724U, all the devices are treatment devices actually used for production, and the treatment devices are complex in structure, large in size and single in function. There is a lack of simple equipment capable of integrating catalytic combustion, adsorption and desorption functions during the development of new treatment materials.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a solve above-mentioned problem, provide a VOC catalytic combustion and adsorb desorption device.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

a VOC catalytic combustion and adsorption desorption device, includes: the device comprises a sample feeding box, a catalytic heater, a heat exchanger, an adsorption/desorption box and a collection box, wherein the sample feeding box is provided with a gas inlet and a gas outlet; the gas outlet of the sample inlet box is connected with the gas inlet of the catalytic heater through a second vent pipe, the second vent pipe is further connected with a third vent pipe, a ventilation valve is arranged on the third vent pipe, the gas inlets of the heat exchanger and the adsorption/desorption box are connected with the gas outlet of the catalytic heater through a three-way pipeline, the gas outlets of the heat exchanger and the adsorption/desorption box are connected with the gas inlet of the collection box through another three-way pipeline, and the front ends and the rear ends of the gas inlets of the heat exchanger and the adsorption/desorption box are provided with ventilation valves.

Furthermore, the second ventilation pipe is further connected with a fourth ventilation pipe, and a ventilation valve is arranged on the fourth ventilation pipe.

Further, catalytic heater includes first casing, forms the catalyst in first casing and places the cabin and set up the heating device in the cabin is placed to the catalyst, the catalyst is placed the cabin and is communicated with catalytic heater's air inlet and gas outlet, still offer the hatch door that is used for the catalyst to place the cabin of opening and shutting on the first casing.

Further, the heating device comprises a plurality of groups of heating units which are sequentially arranged along the direction from the air inlet to the air outlet.

Furthermore, the heat exchanger comprises a second shell and a plurality of heat exchange plates which are sequentially arranged in the second shell along the direction from the air inlet to the air outlet, and the second shell is provided with the air inlet and the air outlet.

Furthermore, a plurality of heat exchange plates are arranged on the upper side and the lower side of the second shell in a staggered mode, and then S-shaped circulation channels are formed.

Further, the adsorption/desorption box comprises a third shell and a mounting groove arranged in the third shell, and the mounting groove is used for placing an adsorption material; the third shell is provided with an air inlet and an air outlet, and the third shell is also provided with a box door for opening and closing the mounting groove.

Further, a temperature sensor and a gas pressure sensor are arranged on the catalytic heater and the adsorption/desorption box; and a temperature sensor is arranged on the heat exchanger.

Further, a fan is arranged at the rear end of the air outlet of the heat exchanger; and/or a fan is arranged at the rear end of the air outlet of the adsorption/desorption box.

Furthermore, a fan is further arranged on the third ventilation pipe.

Through the utility model provides a technical scheme has following beneficial effect:

the application provides a VOC catalytic combustion and adsorption desorption device, catalytic combustion has been integrated, adsorb and the desorption function, can carry out the catalytic combustion test to the catalytic combustion material respectively and adsorb the test to adsorbing material, can also carry out the desorption to accomplishing absorbent adsorbing material in order to realize cyclic utilization, and simple structure, reasonable in design, easy and simple to handle, use manpower sparingly, practice thrift the cost, accord with the actual demand in laboratory more, so that to the detection and the aassessment of novel processing material treatment effeciency during research and development.

Drawings

Fig. 1 is a schematic structural view of the VOC catalytic combustion and adsorption-desorption apparatus in the embodiment.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1, the present embodiment provides a VOC catalytic combustion and adsorption-desorption device, which includes: all be provided with injection case 3, catalytic heater 9, heat exchanger 13, absorption/desorption case 14 and the collecting box 17 of air inlet and gas outlet, first ventilation pipe 1 is connected to the air inlet of injection case 3, be provided with ventilation valve 2 on the first ventilation pipe 1, injection case 3 still is provided with introduction port 4.

The gas outlet of the sampling box 3 is connected with the gas inlet of the catalytic heater 9 through a second vent pipe 8, the second vent pipe 8 is further connected with a third vent pipe 10, and a vent valve 7 is arranged on the third vent pipe 10. The heat exchanger 13 and the adsorption/desorption box 14 are arranged in parallel, the air inlets of the heat exchanger 13 and the adsorption/desorption box 14 are connected with the air outlet of the catalytic heater 9 through a three-way pipeline 19, namely the three-way pipeline 19 is a pipeline with one inlet and two outlets, one inlet is connected with the air outlet of the catalytic heater 9, and the two outlets are respectively connected with the air inlet of the heat exchanger 13 and the air inlet of the adsorption/desorption box 14.

The air outlets of the heat exchanger 13 and the adsorption/desorption box 14 are connected with the air inlet of the collection box 17 through a three-way pipeline 18, namely the three-way pipeline 18 is a pipeline with two inlets and one outlet, the two inlets are respectively connected with the air outlet of the heat exchanger 13 and the air outlet of the adsorption/desorption box 14, and the other outlet is connected with the air inlet of the collection box 17. The front ends of the air inlets and the rear ends of the air outlets of the heat exchanger 13 and the adsorption/desorption box 14 are provided with ventilation valves, namely the front end of the air inlet of the heat exchanger 13 is provided with the ventilation valve 12, the rear end of the air outlet of the heat exchanger 13 is provided with the ventilation valve 23, the front end of the air inlet of the adsorption/desorption box 14 is provided with the ventilation valve 11, and the rear end of the air outlet of the adsorption/desorption box 14 is provided with the ventilation valve 24.

By adopting the VOC catalytic combustion and adsorption desorption device, when catalytic combustion is carried out for use, catalytic combustion materials (namely, catalyst) are put into the catalytic heater 9, and the catalytic heater 9 is started to preheat to reach a set temperature. Opening the ventilation valve 2 and closing the ventilation valve 7; VOC waste gas enters the sample inlet box 3 through the sample inlet 4, air is introduced into the first vent pipe 1, the VOC waste gas carried by the VOC waste gas enters the catalytic heater 9 through the second vent pipe 8, the VOC waste gas is introduced into the catalytic heater 9 for reaction, after the reaction is finished, the vent valve 12 is opened and the vent valve 11 is closed, the generated gas is discharged into the heat exchanger 13 through the three-way pipe 19 for heat exchange and cooling, after the cooling is finished, the vent valve 23 is opened and the vent valve 24 is closed, the gas enters the collecting box 17 for collection and treatment, and finally the gas is discharged through the gas outlet of the collecting box 17. The operation of catalytic combustion is completed.

When the adsorption is performed, the adsorption material is put into the adsorption/desorption box 14, and the catalytic heater 9 does not work; opening the ventilation valves 2 and 11; closing the ventilation valves 7, 12; VOC waste gas enters the sample inlet box 3 through the sample inlet 4, air is introduced into the first ventilation pipe 1, the VOC carrying waste gas sequentially passes through the second ventilation pipe 8, the catalytic heater 9 and the three-way pipe 19 to enter the adsorption/desorption box 14, the VOC waste gas is adsorbed by the adsorption/desorption box 14, and after adsorption is finished, the ventilation valve 24 is opened and the ventilation valve 23 is closed; the residual gas is discharged into the collection box 17 for collection and treatment, and finally discharged through the gas outlet of the collection box 17.

When desorption is carried out, the materials after adsorption are put into the adsorption/desorption box 14, the

ventilation valves

2, 12 and 23 are closed, and the ventilation valves 7 and 11 are opened; the catalytic heater 9 only carries out heating operation (namely, catalytic combustion materials are not put in), external air flows through the third vent pipe 10 and flows into the catalytic heater 9 to be heated, then hot air is formed and flows into the adsorption/desorption box 14 again, the adsorption materials are swept, adsorption is regenerated, and the adsorbent can be used again, so that desorption is realized. After the desorption is finished, the vent valve 24 is opened, so that the residual gas is discharged into the collection box 17 for collection treatment, and finally is discharged through the gas outlet of the collection box 17.

The application provides a VOC catalytic combustion and absorption desorption device, catalytic combustion has been integrated, adsorb and the desorption function, can carry out the catalytic combustion test to the catalytic combustion material respectively and adsorb the test to adsorbing material, can also carry out the desorption to accomplishing absorbent adsorbing material and in order to realize cyclic utilization, and simple structure, and reasonable in design, easy and simple to handle, use manpower sparingly, practice thrift the cost, accord with the actual demand in laboratory more, so that to the detection and the aassessment of novel processing material treatment effeciency during research and development.

Specifically, the collection box 17 in this embodiment adopts a structure capable of collecting VOC exhaust gas in the prior art, and plays a role in collecting VOC exhaust gas.

Specifically, in this embodiment, the second ventilation pipe 8 is further connected to a fourth ventilation pipe 20, and the fourth ventilation pipe 20 is provided with a ventilation valve 5. By such arrangement, the fourth vent pipe 20 can also be ventilated, and the introduced gas is mixed with the mixed gas flowing out of the sample injection box 3 again, so that the effect of further regulating the concentration of the VOC waste gas is achieved; if when carrying out catalytic combustion use and absorption use, all can inject into the air of appropriate flow through fourth air pipe 20 and adjust VOC waste gas concentration, concentration control is more convenient, accurate for the test data is more accurate. When desorption is performed, the vent valve 5 is closed. Of course, in other embodiments, the fourth ventilation pipe 20 may not be provided, and the control of the VOC exhaust gas concentration may be directly achieved by controlling the air flow rate injected by the first ventilation pipe 1 and the VOC exhaust gas amount injected by the injection port 4.

Further preferably, in this embodiment, the third ventilation pipe 10 is further provided with a fan 6, and when the vent valve 7 is opened during desorption, the fan 6 blows external air into the third ventilation pipe 10, so that the structure is simple and the cost is low. Of course, in other embodiments, the third ventilation pipe 10 may be connected to a gas transmission source (such as a compression pump) to realize gas transmission, which is only costly.

Catalytic heater 9 includes first casing, forms the catalyst in first casing and places the cabin and set up heating device 22 in the cabin is placed to the catalyst, the air inlet and the gas outlet intercommunication of cabin and catalytic heater are placed to the catalyst, still offer the hatch door that is used for opening and shutting the catalyst and places the cabin on the first casing to in putting into the catalyst with the catalyst and placing the cabin, heating device 22 heats the gas that the cabin was placed to the convection current through the catalyst, and the catalyst can reduce the temperature of igniting of reactant (VOC waste gas), with better catalytic combustion that carries on. More specifically, the heating device 22 includes a plurality of groups of heating units (such as heating wires or heating pipes) sequentially arranged along a direction from the air inlet to the air outlet; so set up, heating area is wide, and heating effect is better. Of course, in other embodiments, the structure of the catalytic heater 9 is not limited thereto.

The heat exchanger 13 comprises a second shell and a plurality of heat exchange plates 21 sequentially arranged in the second shell along the direction from the air inlet to the air outlet, the second shell is provided with the air inlet and the air outlet, and hot gas entering the heat exchanger 13 directly contacts with the heat exchange plates 21 for heat exchange, so that the cooling effect is realized. More specifically, the plurality of heat exchange plates 21 are arranged on the upper side and the lower side of the second shell in a staggered manner, so that an S-shaped circulation channel is formed, the circulation path of the gas in the heat exchanger 13 is increased, and the heat exchange effect is better. Of course, in other embodiments, the structure of the heat exchanger 13 is not limited thereto.

The adsorption/desorption box 14 comprises a third shell and a mounting groove arranged in the third shell, wherein the mounting groove is used for placing an adsorption material; set up air inlet and gas outlet on the third casing, still be provided with the chamber door that is used for opening and shutting the mounting groove on the third casing, so, be convenient for adsorbing material get put the operation, and simple structure. Of course, in other embodiments, the structure of the adsorption/desorption tank 14 is not limited thereto.

The catalytic heater 9 is provided with a temperature sensor 25 and a gas pressure sensor 26, and the adsorption/desorption box 14 is provided with a temperature sensor 28 and a gas pressure sensor 29; a temperature sensor 27 is arranged on the heat exchanger 13. Therefore, the temperature and the air pressure condition of the internal gas can be well monitored, the effect of real-time monitoring is achieved, and the test is better guaranteed.

A fan 15 is also arranged at the rear end of the air outlet of the heat exchanger 13; the fan 15 is used for discharging the gas in the heat exchanger 13. A fan 16 is further disposed at the rear end of the air outlet of the adsorption/desorption tank 14, and the fan 16 is used for discharging the air in the adsorption/desorption tank 14. The discharge is more thorough. Of course, in other embodiments, the fan 15 or the fan 16 may not be provided, and the exhaust gas in the heat exchanger 13 or the suction/desorption tank 14 is blown out by the gas injected by the first ventilation pipe 1 or the third ventilation pipe 10.

The utility model provides a scheme has stronger practicality to VOC treatment effeciency, to different novel materials, under the less material circumstances of utilization, can simulate whole VOC processing procedure, obtains the treatment effeciency of novel material.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a VOC catalytic combustion and adsorption and desorption device which characterized in that includes: the device comprises a sample inlet box, a catalytic heater, a heat exchanger, an adsorption/desorption box and a collection box, wherein the sample inlet box is provided with a gas inlet and a gas outlet; the gas outlet of the sample inlet box is connected with the gas inlet of the catalytic heater through a second vent pipe, the second vent pipe is further connected with a third vent pipe, a ventilation valve is arranged on the third vent pipe, the gas inlets of the heat exchanger and the adsorption/desorption box are connected with the gas outlet of the catalytic heater through a three-way pipeline, the gas outlets of the heat exchanger and the adsorption/desorption box are connected with the gas inlet of the collection box through another three-way pipeline, and the front ends and the rear ends of the gas inlets of the heat exchanger and the adsorption/desorption box are provided with ventilation valves.

2. The VOC catalytic combustion and adsorption desorption device of claim 1, wherein: the second ventilation pipe is further connected with a fourth ventilation pipe, and a ventilation valve is arranged on the fourth ventilation pipe.

3. The VOC catalytic combustion and adsorption-desorption device of claim 1, which is characterized in that: the catalytic heater includes first casing, forms the catalyst in first casing and places the cabin and set up the heating device in the cabin is placed to the catalyst, the catalyst is placed the cabin and is communicated with catalytic heater's air inlet and gas outlet, still offer the hatch door that is used for opening and shutting the catalyst and places the cabin on the first casing.

4. The VOC catalytic combustion and adsorption desorption device of claim 3, wherein: the heating device comprises a plurality of groups of heating units which are sequentially arranged along the direction from the air inlet to the air outlet.

5. The VOC catalytic combustion and adsorption desorption device of claim 1, wherein: the heat exchanger comprises a second shell and a plurality of heat exchange plates which are sequentially arranged in the second shell along the direction from the air inlet to the air outlet, and the second shell is provided with the air inlet and the air outlet.

6. The VOC catalytic combustion and adsorption desorption device of claim 5, wherein: the plurality of heat exchange plates are arranged on the upper side and the lower side of the second shell in a staggered mode, and then S-shaped circulation channels are formed.

7. The VOC catalytic combustion and adsorption-desorption device of claim 1, which is characterized in that: the adsorption/desorption box comprises a third shell and a mounting groove arranged in the third shell, and the mounting groove is used for placing an adsorption material; the third shell is provided with an air inlet and an air outlet, and the third shell is also provided with a box door for opening and closing the mounting groove.

8. The VOC catalytic combustion and adsorption-desorption device of claim 1, which is characterized in that: temperature sensors and air pressure sensors are arranged on the catalytic heater and the adsorption/desorption box; and a temperature sensor is arranged on the heat exchanger.

9. The VOC catalytic combustion and adsorption desorption device of claim 1, wherein: a fan is also arranged at the rear end of the air outlet of the heat exchanger; and/or a fan is arranged at the rear end of the air outlet of the adsorption/desorption box.

10. The VOC catalytic combustion and adsorption desorption device of claim 1, wherein: and a fan is also arranged on the third ventilation pipe.