WO2022151699A1 - Combined modular integrated machine for efficient purification of exhaust gas - Google Patents

Abstract

A combined modular integrated machine for efficient purification of exhaust gas, comprising a pre-treatment module (1), an adsorption and concentration module (2) and a power and catalytic combustion module (3); the pre-treatment module (1) comprises a flow guide chamber, a powder booth and a filter chamber, wherein an air inlet (103) is arranged on a side wall of the flow guide chamber, a baffle plate (106) is arranged at the rear end of the air inlet (103), a powder blower (107) is arranged at the top of the powder booth, and a filter cartridge (108) is arranged in the filter chamber; the adsorption and concentration module (2) is internally provided with an adsorption layer (204); and the power and catalytic combustion module (3) comprises an adsorption fan (308), a heat exchanger (310), a catalytic combustion device (311) and a desorption fan (312). The combined modular integrated machine for efficient purification of exhaust gas has the advantages of compact and simple structure, high purification efficiency, stable desorption, high utilization of waste heat, etc., and can effectively remove dust particles and volatile organics in the exhaust gas.

Description

A combined modular high-efficiency exhaust gas purification integrated machine technical field

The invention relates to the technical field of exhaust gas treatment equipment, in particular to a combined modularized high-efficiency exhaust gas purification integrated machine.

Background technique

Since _NOx and _SOx , VOCs (volatile organic compounds) have become a new focus affecting the national economy and people's livelihood security. They not only have the characteristics of harming the ecosystem, but also can act as a "catalyst" to promote the generation of haze. Due to the large use of organic solvents in the coating industry and the poor sealing conditions of the ecological environment, the paint mist and VOCs produced by them have teratogenic, carcinogenic and mutagenic effects, causing many harm to the human body and the ecosystem.

technical problem

At present, for exhaust gas treatment in the coating industry, some single treatment processes such as "activated carbon adsorption", "photocatalysis", and "low temperature plasma" are used. This single treatment process generally has low purification efficiency, limited adsorption capacity, and frequent replacement of activated carbon. , The concentration of exhaust gas fluctuates greatly. The other part adopts the combined process of "activated carbon adsorption, desorption + catalytic combustion". The effect of this type of combined process on exhaust gas purification is generally better than that of a single treatment process, but there are also the following problems: (1) The front-end particulate matter is not filtered cleanly, It affects the adsorption efficiency of the adsorbent, and the filter material is replaced frequently, and the labor cost is high; (2) the utilization rate of waste heat is low, and the energy consumption is large; (3) because the catalytic combustion device cannot completely purify the organic waste gas, the unpurified organic waste gas continues to Cyclic purging in the desorption system not only has low desorption efficiency, but also has safety risks; (4) All fans, pipes, and valves are assembled on-site. The on-site pipeline is complex, the leakage rate is high, and the equipment occupies a large area. .

technical solutions

In view of this, the technical problems solved by the present invention are as follows: for the existing activated carbon adsorption, desorption + catalytic combustion process, the front-end particulate matter is not filtered cleanly, it is difficult to replace the filter material, the utilization rate of waste heat is low, the desorption is unstable, the on-site pipeline is complex, and the To solve the problems of large floor area and other problems, a combined modular and efficient exhaust gas purification integrated machine is provided, which has the advantages of compact and simple structure, high purification efficiency, stable desorption and high utilization rate of waste heat, and can effectively remove dust particles and volatilization in the exhaust gas. Sexual organic matter.

The present invention solves the above-mentioned problems through the following technical means:

A combined modularized high-efficiency exhaust gas purification integrated machine includes a pretreatment module, an adsorption concentration module, and a power and catalytic combustion module; the pretreatment module includes a guide chamber, a powder spraying chamber, and a filter chamber, and the guide chamber has a The side wall is provided with an air inlet, the rear end of the air inlet is provided with a baffle, the top of the dusting chamber is provided with a duster, the filter chamber is provided with a filter cartridge, and the bottom of the filter cartridge is provided with a an ash bucket; an adsorption layer is arranged in the adsorption concentration module; the power and catalytic combustion module includes an adsorption fan, a heat exchanger, a catalytic combustion device and a desorption fan, and the adsorption concentration module, the adsorption fan, the heat exchanger, Between the catalytic combustion device and the desorption fan, an integrated unit of adsorption, desorption and catalytic combustion is formed through the matching desorption pipeline, desorption damper, fresh air pipeline and fresh air damper.

Further, the filter chamber is provided with a backflushing device.

Further, the two ends of the filter cartridge are provided with pressure sensors, the installation position of the filter cartridge is provided with a pretreatment module inspection door, and the pretreatment module is also equipped with a differential pressure display instrument.

Further, the adsorption layer includes an adsorption box body and a solid porous adsorption material filled in the adsorption box body, the adsorption box body is drawn and matched with the shell of the adsorption concentration module through the guide rail, and the bottom of the adsorption box body is a mesh plate; The adsorbent material is activated carbon or molecular sieve with honeycomb structure.

Further, the adsorption concentration module is equipped with an adsorption material installation door and a top access door.

Further, the power and catalytic combustion modules are equipped with fresh air shutters, air outlets and access doors for the power and catalytic combustion modules.

Further, the air inlet end of the adsorption fan is communicated with the air outlet end of the adsorption concentration module through the air inlet duct, and the air outlet end of the adsorption fan is communicated with the air outlet through the air outlet duct, and the air inlet duct is provided with an adsorption outlet. damper.

Further, the heat exchanger is provided with the heat exchanger cold air inlet, the heat exchanger hot air outlet, the heat exchanger hot air inlet and the heat exchanger cold air outlet, the heat exchanger cold air inlet and the heat exchanger hot air outlet. The hot air inlet of the heat exchanger is communicated with the cold air outlet of the heat exchanger.

Further, both the air inlet and the air outlet of the catalytic combustion device are provided with flame arresters.

Further, the air inlet end of the adsorption layer, the interior of the catalytic combustion device and the cold air outlet of the heat exchanger are all provided with temperature detection, and the air outlet of the desorption fan is provided with VOCs concentration detection.

beneficial effect

1. Detackify and finely filter the viscous paint mist particles in the exhaust gas. The concentration of the filtered particles is less than or equal to 1mg/m ³ , and the filter element of the filter cartridge is automatically pulsed backflushed by compressed air to prolong the service life of the filter element and reduce the The cost of manual filter replacement.

2. Compared with the original activated carbon adsorption and desorption system, a supplementary cooling fan is reduced through the unique air flow channel structure design of the heat exchanger. At the same time, the heat exchanger can store the residual heat after heating for heating of fresh air. The utilization rate of waste heat is improved, and the energy consumption of the system is reduced.

3. Compared with the original activated carbon adsorption and desorption system, the high-temperature gas after catalytic oxidation is used in the desorption system to cyclically purge the adsorption unit. In the present invention, the purified high-temperature gas is exchanged with outdoor fresh air through a heat exchanger. After heat exchange, the original gas is discharged to the outside, and the heated fresh air is used to thermally purge the adsorption unit, which effectively avoids the deposition of organic waste gas in the pipeline and improves the stability and safety of desorption.

4. The modular structure design is adopted. The installation and pre-commissioning of all modules and components are completed in the factory. After sending to the site, only the corresponding modules need to be connected, which greatly reduces the workload of the site, and also solves the problem. The deviation caused by production or installation ensures the overall airtightness of the equipment, and the overall appearance is beautiful.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

Fig. 1 is the overall schematic diagram of the present invention;

Fig. 2 is the overall front view of the present invention;

Fig. 3 is the overall plan view of the present invention;

Fig. 4 is the overall left side view of the present invention;

Fig. 5 is the internal structure schematic diagram of the present invention;

Fig. 6 is the schematic diagram of the heat exchanger of the present invention;

Labels in the figure:

1-Pretreatment module, 2-Adsorption concentration module, 3-Power and catalytic combustion module.

101- Access door of pretreatment module, 102- Differential pressure display instrument, 103- Air inlet, 104- Hoisting plate, 105- Water retaining groove, 106- Baffle plate, 107- Duster, 108- Filter cartridge, 109- Ash Barrel, 110 - Backflush device.

201-Adsorption material installation door, 202-Top access door, 203-Adsorption air inlet valve, 204-Adsorption layer, 205-Desorption pipeline.

301- Fresh air shutter, 302- Air outlet, 303- Power and catalytic combustion module access door, 304- Desorption valve, 305- Adsorption air valve, 306- Air inlet duct, 307- Exhaust duct, 308- Adsorption fan , 309- fresh air valve, 310- heat exchanger, 311- catalytic combustion device, 312- desorption fan.

3101- heat exchanger cold air inlet, 3102- heat exchanger hot air outlet, 3103- heat exchanger hot air inlet, 3104 heat exchanger cold air outlet.

BEST MODE FOR CARRYING OUT THE INVENTION

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the accompanying drawings, only for the purpose of It is convenient to describe the present invention and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

As shown in FIGS. 1 to 6 , the combined modular high-efficiency exhaust gas purification integrated machine provided by the present invention is provided with a hoisting plate 104 and a water retaining groove 105 on the top. The hoisting plate is used for hoisting, and the water retaining groove is used for water blocking and waterproofing. It mainly includes a pretreatment module 1, an adsorption concentration module 2 and a power and catalytic combustion module 3. Each module is a work unit with independent functions, including a base, a shell and a module body fixed on the base; the modules are connected in series or in parallel, and bolts, flanges, etc. can be used to tighten the modules. Firmware or on-site welding are used for connection, and the module connection is tightly sealed and easy to disassemble.

The pretreatment module is used for the purification and collection of paint mist particles in the exhaust gas, and mainly includes a guide chamber, a powder spraying chamber and a filter chamber. The side wall of the guide chamber is provided with an air inlet 103, and the air inlet is used for Input of organic waste gas containing paint mist particles. The rear end of the air inlet is provided with a baffle plate 106, the baffle plate has a certain retention angle and plate spacing, and is used for inducing the airflow direction and reducing the wind speed, so as to avoid the rapid airflow directly impacting the filter material. The top of the powder spraying chamber is provided with a powder sprayer 107, which can spray talc powder into the exhaust gas to mix with it, and the talc powder adheres to the surface of the viscous paint mist to eliminate the viscosity of the paint mist. A filter cartridge 108 is installed horizontally or vertically in the filter chamber. The filter cartridge has a circular or elliptical structure with a rigid support inside, and the surface is made of wood pulp fiber paper or polyester non-woven fabric. The filter cartridge can finely filter the paint mist particles in the exhaust gas, so that the concentration of the particles entering the subsequent modules is less than or equal to 1 mg/m ³ . The bottom of the filter cartridge is provided with an ash bucket 109, and the ash bucket is connected to the ash bucket in the form of cylinder lifting.

A backflushing device 110 is installed in the filter chamber, and the paint mist particles attached to the surface of the filter material can be pulsed backflushed by the backflushing action of compressed air. The cleaning process is automatically controlled by the pulse controller. Particles fall into the bottom ash bucket.

Pressure sensors are installed at both ends of the filter cartridge to monitor the change of the pressure difference at both ends of the filter cartridge in real time, and automatic backflushing is performed when the pressure at both ends exceeds a limit value. The preprocessing module is also equipped with a differential pressure display instrument 102 .

The installation position of the filter cartridge is provided with a pretreatment module inspection door 101 to facilitate the inspection and replacement of the filter element.

The adsorption and concentration module 2 is used for the adsorption and concentration of volatile organic compounds in the exhaust gas. The air inlet end of the adsorption and concentration module is provided with an adsorption air inlet valve 203. The adsorption and concentration module is equipped with an adsorption material installation door 201 and a top inspection door 202. A plurality of independent adsorption units are arranged in the module, and the adsorption units are composed of an adsorption layer 204. The adsorption layer includes an adsorption box body and a solid porous adsorption material filled in the adsorption box body. The shell of the adsorption and concentration module is drawn and matched, and the bottom of the adsorption box is a mesh plate; the adsorption material is activated carbon or molecular sieve with honeycomb structure.

The power and catalytic combustion module 3 is used to provide power to pump the exhaust gas from the generation source into the integrated equipment through the pipeline, and to purge the adsorption layer 204 with hot air to regenerate and analyze the adsorbent material. The concentrated exhaust gas enters the catalytic combustion device 311 and is oxidized into carbon dioxide and water by the action of the catalyst. The purified gas will take out a part of the heat and enter the heat exchanger 310 for heat exchange with the outdoor fresh air. The desorption fan 312 discharges up to the standard, and after the outdoor fresh air is heated by the heat exchanger, the adsorption unit is purged again. It is equipped with fresh air shutters 301, an air outlet 302 and a power and catalytic combustion module access door 303, mainly including: an adsorption fan 308, a heat exchanger 310, a catalytic combustion device 311 and a desorption fan 312. The air end is communicated with the air outlet end of the adsorption and concentration module through the air inlet duct 306, and the air outlet end of the adsorption fan is communicated with the air outlet through the air exhaust duct 307, and the air inlet duct is provided with an adsorption air outlet valve 305; The heat exchanger is provided with the heat exchanger cold air inlet 3101, the heat exchanger hot air outlet 3102, the heat exchanger hot air inlet 3103 and the heat exchanger cold air outlet 3104, the heat exchanger cold air inlet and the heat exchanger hot air outlet The hot air inlet of the heat exchanger is communicated with the cold air outlet of the heat exchanger; the air inlet and air outlet of the catalytic combustion device are provided with flame arresters; the adsorption concentration module, adsorption fan, heat exchanger, catalytic combustion device The integrated unit of adsorption, desorption and catalytic combustion is formed between it and the desorption fan through the matching desorption pipeline 205, desorption damper 304, fresh air pipeline and fresh air damper 309. The specific pipeline and valve arrangement are all in the prior art, here Do not go into detail.

The heat exchanger is provided with several partitions inside, so that a staggered distribution structure of air flow is formed in the inside of the heat exchanger.

A thermal insulation layer is arranged around the power and catalytic combustion module.

The adsorption fan and the desorption fan are centrifugal fans.

The desorption fan adopts an explosion-proof fan.

The fresh air damper is provided with a fresh air filter.

All desorption pipes are square or round pipes.

All pipes are connected by flanges, and the connection is made of high temperature oil-impregnated asbestos packing.

During the adsorption stage: the industrial coating exhaust gas enters the pretreatment module through the air inlet 103 under the negative pressure of the adsorption fan 308, and the baffle plate at the air inlet induces the airflow to diffuse around, thereby reducing the filtering wind speed. The exhaust gas enters the powder spraying chamber, the powder sprayer 107 is turned on, and the talc powder is sprayed into the powder spraying chamber to mix with the viscous paint mist particles. After that, the exhaust gas containing paint mist is filtered by the filter cartridge, and the paint mist particles after desticking are attached to the surface of the filter cartridge, and the organic exhaust gas passes through the filter cartridge and enters the next module.

Both ends of the filter cartridge 108 are equipped with pressure sensors, which can monitor the pressure difference between the two ends of the filter cartridge in real time and display it on the differential pressure display instrument 102 in real time. As the pressure difference between the two ends of the filter cartridge gradually increases, the backflushing device automatically turns on the backflushing, and sprays 0.4-0.6MPa compressed air to the filter cartridge, and the paint mist particles attached to the surface of the filter cartridge fall off under the backflushing of the compressed air. Put it in the ash bucket, and then collect it by the workers and transport it to the professional factory for unified treatment.

After the organic waste gas filtered by the filter cartridge 108 enters the adsorption and concentration module 2, under the adsorption of the adsorption layer, the organic waste gas is adsorbed in the adsorption layer of the porous structure. The adsorption material can be either activated carbon, molecular sieve or A new type of adsorbent material. The clean air purified by the adsorption layer passes through the adsorption outlet valve, the air inlet duct and the adsorption fan successively, and then is discharged through the exhaust duct and air outlet up to the standard.

In the desorption stage: when the exhaust gas is adsorbed to a certain concentration, the adsorption fan and the adsorption outlet valve are closed at this time, and the catalytic combustion device starts to preheat. Under the action of the negative pressure of the corresponding desorption fan, the fresh air enters the catalytic combustion device through the fresh air damper and starts to heat. From the cold air outlet of the heat exchanger to the corresponding desorption fan, it is discharged into the atmosphere.

When the heat exchanger is heated to a certain temperature, the corresponding fresh air damper is closed and the corresponding desorption damper is opened. At this time, the outdoor fresh air enters from the cold air inlet of the heat exchanger under the action of the corresponding desorption fan, and is heated by the heat exchanger. The heated fresh air is discharged from the hot air outlet of the heat exchanger and enters the adsorption through the corresponding desorption pipeline. In the concentration module, the heated air purifies the surface of the adsorption layer, analyzes and regenerates the adsorption unit, and the high-concentration organic waste gas is swept out and enters the catalytic combustion device through the corresponding desorption pipeline. Under the action of the catalyst Oxidized into carbon dioxide and water, while releasing part of the heat. The treated high-temperature exhaust gas returns to the heat exchanger from the hot air inlet of the heat exchanger, exchanges heat with the outdoor fresh air, releases the heat from the cold air outlet of the heat exchanger, and discharges up to the standard after passing through the corresponding desorption fan. .

A temperature detector is installed at the air inlet of the adsorption layer, and the temperature detector is used to detect the inlet air temperature; a temperature detector is installed in the catalytic combustion device to detect the catalytic combustion temperature; It is used to detect the temperature of the exhaust gas; a VOCs concentration detector is installed at the air outlet of the desorption fan to detect the VOCs emission concentration.

In summary, using the exhaust gas purification integrated machine of the present invention, on the one hand, the paint mist particles in the exhaust gas are finely filtered by the filter cartridge, and the concentration of particles entering the subsequent modules is less than or equal to 1 mg/m ³ , which can ensure the safe and stable operation of adsorption . At the same time, the paint mist is removed by powder spraying, and it is blown off by pulse backflushing, which prolongs the service life of the filter element and reduces the cost of manual replacement of the filter element. On the other hand, through the structural design of the unique airflow channel of the heat exchanger, the adsorption layer is thermally purged with heated fresh air, which avoids the safety risk caused by the deposition of organic waste gas in the pipeline. The waste heat is stored and used for heating of fresh air, which improves the utilization rate of waste heat and reduces the energy consumption of the system.

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 Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A combined modularized high-efficiency exhaust gas purification integrated machine is characterized in that: it includes a pretreatment module (1), an adsorption concentration module (2), and a power and catalytic combustion module (3); the pretreatment module includes a guide chamber, a A powder spraying chamber and a filter chamber, the side wall of the guide chamber is provided with an air inlet (103), the rear end of the air inlet is provided with a baffle (106), and the top of the powder spraying chamber is provided with a powder spray A filter (107), a filter cartridge (108) is installed in the filter chamber, and an ash bucket (109) is arranged at the bottom of the filter cartridge; an adsorption layer (204) is arranged in the adsorption and concentration module; the power and catalysis The combustion module includes an adsorption fan (308), a heat exchanger (310), a catalytic combustion device (311) and a desorption fan (312). The adsorption and concentration module (2), the adsorption fan (308), the heat exchanger (310) ), the catalytic combustion device (311) and the desorption fan (312) through the matching desorption pipeline (205), the desorption damper (304), the fresh air pipeline and the fresh air damper (309) to form adsorption and desorption and catalytic Combustion integrated unit.
2. The combined modularized high-efficiency exhaust gas purification integrated machine according to claim 1, characterized in that: the filter chamber is provided with a backflushing device (110).
3. The combined modularized high-efficiency exhaust gas purification integrated machine according to claim 2, characterized in that: the two ends of the filter cartridge (108) are provided with pressure sensors, and the installation position of the filter cartridge is provided with a pretreatment module inspection door (101). ), the preprocessing module is also equipped with a differential pressure display instrument (102).
4. The combined modular high-efficiency exhaust gas purification integrated machine according to claim 3, characterized in that: the adsorption layer (204) comprises an adsorption box body and a solid porous adsorption material filled in the adsorption box body, and the adsorption box body The guide rail is drawn and matched with the shell of the adsorption and concentration module, and the bottom of the adsorption box is a mesh plate; the adsorption material is activated carbon or molecular sieve with honeycomb structure.
5. The combined modular high-efficiency exhaust gas purification integrated machine according to claim 4, characterized in that: the adsorption concentration module is equipped with an adsorption material installation door (201) and a top access door (202).
6. The combined modularized high-efficiency exhaust gas purification integrated machine according to claim 5, characterized in that: the power and catalytic combustion module is equipped with fresh air shutters (301), an air outlet (302) and a power and catalytic combustion module access door (303).
7. The combined modularized high-efficiency exhaust gas purification integrated machine according to claim 6, characterized in that: the air inlet end of the adsorption fan (308) is communicated with the air outlet end of the adsorption concentration module through the air inlet pipe (306), and the adsorption The air outlet end of the fan is communicated with the air outlet through an air outlet duct (307), and an adsorption air outlet valve (305) is arranged on the air inlet duct.
8. The combined modularized high-efficiency exhaust gas purification integrated machine according to claim 7, characterized in that: the heat exchanger is provided with a heat exchanger cold air inlet (3101), a heat exchanger hot air outlet (3102), a heat exchanger The hot air inlet of the heat exchanger (3103) and the cold air outlet of the heat exchanger (3104) are connected.
9. The combined modularized high-efficiency exhaust gas purification integrated machine according to claim 8, characterized in that: the air inlet and the air outlet of the catalytic combustion device (311) are provided with flame arresters.
10. The combined modularized high-efficiency exhaust gas purification integrated machine according to claim 9, wherein the air inlet end of the adsorption layer, the interior of the catalytic combustion device and the cold air outlet of the heat exchanger are all provided with temperature detection, and the desorption fan VOCs concentration detection is set at the air outlet.