Furniture VOC waste gas pretreatment device

Abstract

The utility model discloses a kind of furniture VOC waste gas pretreatment device, belong to VOC waste gas pretreatment technical field, including four supporting legs, four supporting legs upper end is fixedly connected with positioning plate, positioning plate inner surface is fixedly connected with processing mechanism, processing mechanism inside is fixedly connected and is communicated with air inlet pipe, it can quickly intercept larger paint mist particles and dust impurities in waste gas by the filter screen of air inlet pipe inside detachable, reduce the risk of subsequent processing equipment jamming;With the all-around spraying of spraying assembly, water-soluble VOC and residual dust can be further dissolved and adsorbed, and then, with the drying treatment of mixing assembly, the concentration of waste gas can be reduced and the waste gas can be dried, forming a process pretreatment system of "filtration-dissolution-drying", which significantly improves the waste gas pretreatment efficiency and quality, reduces the burden and cost of subsequent deep treatment, and improves the practicability of the device.

Description

Technical Field

[0001] This utility model relates to the field of VOC exhaust gas pretreatment technology, and more specifically, to a furniture VOC exhaust gas pretreatment device. Background Technology

[0002] VOCs, or volatile organic compounds, refer to a class of organic compounds that exist in the air as vapor at room temperature. These substances are characterized by their volatility, toxicity, or irritation, posing potential hazards to the environment and human health, and are one of the key targets for air pollution control.

[0003] VOC waste treatment is a key link in environmental pollution control. Its core lies in using technological means to reduce, render harmless, and recycle pollutants. From a macro perspective, this is an inevitable requirement for promoting ecological civilization and achieving harmonious coexistence between humans and nature. From a micro perspective, it is a necessary measure to ensure compliant operation of enterprises and safeguard public health. With the continuous upgrading of environmental standards, VOC treatment technology will develop towards higher efficiency, intelligence, and low carbon emissions, providing stronger support for green and sustainable development.

[0004] However, in actual production in the furniture industry, the exhaust gas often contains impurities such as paint mist particles and dust, which can easily clog the adsorbents or catalysts of subsequent treatment equipment, leading to a decrease in treatment efficiency and a surge in equipment maintenance costs. Therefore, it is necessary to pre-treat the exhaust gas to reduce the content of large particles and dust in order to facilitate subsequent treatment.

[0005] Therefore, a furniture VOC exhaust gas pretreatment device is proposed to address the above problems. Utility Model Content

[0006] 1. Technical problems to be solved

[0007] In view of the problems existing in the prior art, the purpose of this utility model is to provide a furniture VOC exhaust gas pretreatment device, which can realize the function of process-oriented exhaust gas pretreatment.

[0008] 2. Technical Solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] A furniture VOC exhaust gas pretreatment device includes four support legs, with a positioning plate fixedly connected to the upper ends of the four support legs. A treatment mechanism is fixedly connected to the inner surface of the positioning plate. An air inlet pipe is fixedly connected and connected to the inside of the treatment mechanism. A removable filter screen is installed inside the air inlet pipe. The treatment mechanism includes a treatment tank, with a tank lid fixedly connected to the upper end of the treatment tank. A spray assembly is fixedly connected to the upper end of the tank lid. An exhaust pipe is fixedly connected and connected to the inner surface of the treatment tank. A solenoid valve is installed on the outer surface of the exhaust pipe. A mixing assembly is fixedly connected and connected to the inner surface of the treatment tank. A limit ring is fixedly connected to the outer surface of the barrel. A drain pipe is fixedly connected and connected to the lower end of the treatment barrel. A solenoid valve is installed on the outer surface of the drain pipe. An air pressure sensor and an air humidity sensor are installed inside the treatment barrel. A filter screen is installed inside the treatment barrel. The filter screen can initially intercept larger paint mist particles and dust impurities in the exhaust gas, reducing the burden of subsequent treatment. The filter screen is easy to disassemble, clean or replace, improving the convenience of device maintenance. The air pressure sensor and the air humidity sensor work together to monitor the air pressure and humidity data inside the barrel in real time, providing a basis for adjusting the operating parameters of the spraying component and the mixing component, and realizing precise pretreatment.

[0011] Furthermore, the spray assembly includes a water pump, with a liquid extraction pipe fixedly connected to the left end of the water pump and a liquid injection pipe fixedly connected to the right end of the water pump. A distribution plate is fixedly connected and communicated to the outer surface of the liquid injection pipe, and a plurality of spray heads are fixedly connected and communicated to the inner surface of the distribution plate. The absorption liquid is evenly distributed to each spray head through the distribution plate, so as to achieve all-round spraying of the waste gas in the treatment tank, ensuring that the waste gas and the absorption liquid are in full contact and improving the purification efficiency.

[0012] Furthermore, the mixing component includes a support plate, the rear end of which is fixedly connected to the front ends of two support legs located on the front side, a vertical plate is fixedly connected to the upper end of the support plate, a fan is fixedly connected to the front end of the vertical plate, and a drying component is fixedly connected to the rear end of the fan by bolts. The fan can introduce external air into the device and mix it with the exhaust gas.

[0013] Furthermore, the drying component includes a connecting pipe, with a connecting plate fixedly connected to the front end of the connecting pipe. The front end of the connecting plate is fixedly connected to the rear end of the fan by bolts. Several electric heating tubes are provided on the inner surface of the connecting pipe, and a controller is fixedly connected to the upper end of the connecting pipe. The air is heated by the electric heating tubes, and the heated air is mixed with the humid exhaust gas to dry the exhaust gas, which is convenient for subsequent treatment. The controller can intelligently adjust the working power of the electric heating tubes according to the data fed back by the air humidity sensor, and accurately control the degree of drying of the exhaust gas by the air.

[0014] Furthermore, the outer surface of the connecting pipe is fixedly connected to and communicates with the inner surface of the processing barrel, the inner surface of the processing barrel is fixedly connected to and communicates with the outer surface of the air inlet pipe, and the outer surface of the processing barrel is fixedly connected to the inner surface of the positioning plate.

[0015] Furthermore, the lower end of the water pump is fixedly connected to the upper end of the bucket lid, and the upper end of the diverter plate is fixedly connected to the lower end of the bucket lid.

[0016] 3. Beneficial effects

[0017] Compared with existing technologies, the advantages of this utility model are:

[0018] (1) This solution can quickly intercept larger paint mist particles and dust impurities in the exhaust gas through the detachable filter screen in the air inlet pipe, reducing the risk of blockage in subsequent treatment equipment; combined with the all-round spraying of the spray component, it can further dissolve and adsorb water-soluble VOCs and residual dust; and combined with the drying treatment of the mixing component, it can reduce the concentration of exhaust gas and dry the exhaust gas, forming a process-oriented pretreatment system of "filtration-dissolution-drying", which significantly improves the efficiency and quality of exhaust gas pretreatment, reduces the burden and cost of subsequent deep treatment, and improves the practicality of the device.

[0019] (2) This solution can monitor the working conditions inside the tank in real time by using the air pressure sensor and air humidity sensor installed inside the tank, and feed the data back to the controller. The controller can intelligently adjust the water pump flow rate of the spray component and the power of the electric heating tube of the mixing component according to the preset parameters, so as to achieve precise matching of spray intensity, drying degree and waste gas treatment requirements, avoid resource waste, and improve the automation level and processing stability of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the processing mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the spray assembly of this utility model;

[0023] Figure 4 This is a schematic diagram of the hybrid component of this utility model;

[0024] Figure 5 This is a schematic diagram of the drying component of this utility model.

[0025] Explanation of the labels in the diagram:

[0026] 1. Support leg; 2. Positioning plate; 3. Processing mechanism; 31. Processing tank; 32. Tank lid; 33. Spray assembly; 331. Water pump; 332. Liquid extraction pipe; 333. Liquid injection pipe; 334. Diverter plate; 335. Spray head; 34. Exhaust pipe; 35. Solenoid valve one; 36. Mixing assembly; 361. Support plate; 362. Vertical plate; 363. Fan; 364. Drying component; 3641. Connecting pipe; 3642. Connecting plate; 3643. Electric heating element; 3644. Controller; 37. Limit ring; 38. Drain pipe; 39. Solenoid valve two; 4. Air inlet pipe. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example 1:

[0031] Please see Figure 1-5A furniture VOC exhaust gas pretreatment device includes four support legs 1, with a positioning plate 2 fixedly connected to the upper end of each support leg 1. A treatment mechanism 3 is fixedly connected to the inner surface of the positioning plate 2. An air inlet pipe 4 is fixedly connected and communicates with the inside of the treatment mechanism 3. A removable filter screen is installed inside the air inlet pipe 4. The treatment mechanism 3 includes a treatment tank 31, with its inner surface fixedly connected and communicating with the outer surface of the air inlet pipe 4. The outer surface of the treatment tank 31 is fixedly connected to the inner surface of the positioning plate 2. A tank cover 32 is fixedly connected to the upper end of the treatment tank 31. A spray assembly 33 is fixedly connected to the upper end of the barrel lid 32. An exhaust pipe 34 is fixedly connected and connected to the inner surface of the treatment barrel 31. A solenoid valve 35 is provided on the outer surface of the exhaust pipe 34. A mixing assembly 36 is fixedly connected and connected to the inner surface of the treatment barrel 31. A limit ring 37 is fixedly connected to the outer surface of the treatment barrel 31. A drain pipe 38 is fixedly connected and connected to the lower end of the treatment barrel 31. A solenoid valve 39 is provided on the outer surface of the drain pipe 38. A pressure sensor and an air humidity sensor are provided in the inner cavity of the treatment barrel 31.

[0032] This solution connects the intake pipe 4 to the exhaust pipe of the furniture factory and the exhaust pipe 34 to the subsequent treatment equipment. During the process of the exhaust gas being passed from the intake pipe 4 into the treatment tank 31, the filter screen will intercept large particles of paint mist and large particles of dust. After the exhaust gas enters the treatment tank 31, the air pressure sensor will monitor the amount of gas in the treatment tank 31 in real time. When the amount of exhaust gas reaches the set amount for the device, the solenoid valve of the exhaust pipe will be closed, so that the exhaust gas will not continue to enter the treatment tank 31. At this time, the spray assembly 33 can be used to spray water or treatment liquid on the exhaust gas in the treatment tank 31 to dissolve and absorb water-soluble VOCs and residual impurities, and to cool the exhaust gas. The wastewater generated in this process can be discharged from the drain pipe 38.

[0033] Then, the outside air is heated and blown into the treatment tank 31 through the mixing component 36 to mix with the exhaust gas, thereby reducing the concentration of the exhaust gas and drying the humid exhaust gas. The humidity of the gas inside the treatment tank 31 is monitored in real time by an air humidity sensor. When the humidity meets the requirements of the next step of the treatment, the heating can be stopped. The gas volume inside the treatment tank 31 is monitored by an air pressure sensor. When the gas volume after mixing with air reaches the set value, the pretreatment is completed. Then, the solenoid valve 35 can be controlled to open, allowing the mixed gas to be discharged from the exhaust pipe 34 to the subsequent treatment equipment for further treatment.

[0034] Please see Figure 2-5The spray assembly 33 includes a water pump 331. The lower end of the water pump 331 is fixedly connected to the upper end of the bucket cover 32. A liquid extraction pipe 332 is fixedly connected to the left end of the water pump 331, and an injection pipe 333 is fixedly connected to the right end of the water pump 331. A diversion plate 334 is fixedly connected and communicated to the outer surface of the injection pipe 333. The upper end of the diversion plate 334 is fixedly connected to the lower end of the bucket cover 32, and a plurality of spray heads 335 are fixedly connected and communicated to the inner surface of the diversion plate 334.

[0035] The mixing component 36 includes a support plate 361, the rear end of which is fixedly connected to the front ends of two support legs 1 located on the front side. A vertical plate 362 is fixedly connected to the upper end of the support plate 361. A fan 363 is fixedly connected to the front end of the vertical plate 362. A drying component 364 is fixedly connected to the rear end of the fan 363 by bolts.

[0036] The drying component 364 includes a connecting pipe 3641. The outer surface of the connecting pipe 3641 is fixedly connected to and communicates with the inner surface of the treatment tank 31. A connecting plate 3642 is fixedly connected to the front end of the connecting pipe 3641. The front end of the connecting plate 3642 is fixedly connected to the rear end of the fan 363 by bolts. Several electric heating tubes 3643 are provided on the inner surface of the connecting pipe 3641. A controller 3644 is fixedly connected to the upper end of the connecting pipe 3641.

[0037] The controller 3644 starts the water pump 331 of the spray assembly 33, and the liquid extraction pipe 332 draws sodium hydroxide aqueous solution from the external storage tank. The solution is then evenly distributed to several spray heads 335 through the injection pipe 333 and the distribution plate 334 to spray the waste gas in the treatment tank 31 in all directions. During this process, water-soluble VOCs and some acidic VOCs are dissolved and neutralized by the absorbent liquid. At the same time, the spraying of the absorbent liquid also has a cooling effect, reducing the temperature of the waste gas to facilitate subsequent treatment. The wastewater generated is discharged through the drain pipe 38. The solenoid valve 39 can be opened periodically to discharge the wastewater to the factory wastewater treatment system.

[0038] An air humidity sensor monitors the humidity of the gas inside the treatment tank 31 in real time and feeds the data back to the controller 3644. If the humidity is higher than the set threshold (e.g., 60% RH), the controller 3644 starts the fan 363 and the electric heating tube 3643. The fan 363 draws in outside air, heats it through the electric heating tube 3643, and then sends it into the treatment tank 31 through the connecting pipe 3641. The heated dry air mixes thoroughly with the humid exhaust gas, reducing the concentration of VOCs in the exhaust gas and drying it. As the drying process proceeds, the air humidity sensor continuously monitors humidity changes. When the humidity reaches the set requirement (e.g., 40% RH), the controller 3644 shuts off the electric heating tube 3643, keeping only the fan 363 running to continue replenishing air to balance the amount of gas inside the treatment tank 31.

[0039] The pressure sensor continuously monitors the amount of gas in the treatment tank 31. When the total amount of gas after mixing with dry air reaches the set value, it indicates that the pretreatment is complete. The controller 3644 controls the solenoid valve 35 to open, and the pretreated mixed gas is discharged from the exhaust pipe 34 and transported to the subsequent VOC treatment equipment for deep purification treatment.

[0040] It should be noted that the solenoid valve 35, solenoid valve 39, controller 3644, fan 363, water pump 331, and electric heating element 3643 in this utility model are powered by a power source, and the solenoid valve 35, solenoid valve 39, fan 363, water pump 331, and electric heating element 3643 are controlled by controller 3644.

[0041] It should be noted that the specific installation methods, circuit connection methods, and control methods of solenoid valve 35, solenoid valve 39, controller 3644, fan 363, water pump 331, and electric heating element 3643 in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0042] Working principle:

[0043] The inlet pipe 4 is connected to the exhaust pipe of the furniture factory via a flange, and the exhaust pipe 34 is connected to the subsequent VOC treatment equipment (such as an activated carbon adsorption tower). The liquid extraction pipe 332 is connected to the sodium hydroxide aqueous solution container via a hose. When the exhaust gas enters the treatment tank 31 from the inlet pipe 4, it is first intercepted by the filter screen to prevent large particles of paint mist and dust from clogging the subsequent treatment equipment. After the exhaust gas enters the treatment tank 31, the pressure sensor monitors the gas pressure inside the tank in real time and transmits the data to the controller 3644. When the amount of exhaust gas in the treatment tank 31 reaches the preset value (such as 60% of the tank's volume), the controller 3644 sends a signal to close the solenoid valve on the exhaust pipe and stop the exhaust gas from continuing to flow in.

[0044] Then, the controller 3644 starts the water pump 331 of the spray assembly 33, and the liquid extraction pipe 332 draws sodium hydroxide aqueous solution from the external storage tank. The solution is then evenly distributed to several spray heads 335 through the injection pipe 333 and the distribution plate 334 to spray the exhaust gas in the treatment tank 31 in all directions. During this process, water-soluble VOC gas and some acidic VOC are dissolved and neutralized by the absorbent liquid. At the same time, the spraying of the absorbent liquid also has a cooling effect, reducing the temperature of the exhaust gas to facilitate subsequent treatment. The generated wastewater is discharged through the drain pipe 38. The solenoid valve 39 can be opened periodically to discharge the wastewater to the factory wastewater treatment system.

[0045] After spraying, an air humidity sensor monitors the humidity of the gas inside the treatment tank 31 in real time and feeds the data back to the controller 3644. If the humidity is higher than the set threshold (e.g., 60% RH), the controller 3644 starts the fan 363 and the electric heating element 3643. The fan 363 draws in outside air, heats it through the electric heating element 3643, and then sends it into the treatment tank 31 through the connecting pipe 3641. The heated dry air mixes thoroughly with the humid exhaust gas, reducing the concentration of VOCs in the exhaust gas and drying it. As the drying process continues, the air humidity sensor continuously monitors humidity changes. When the humidity reaches the set requirement (e.g., 40% RH), the controller 3644 shuts off the electric heating element 3643, keeping only the fan 363 running to continue replenishing air to balance the gas volume inside the treatment tank 31.

[0046] The pressure sensor continuously monitors the amount of gas in the treatment tank 31. When the total amount of gas after mixing with dry air reaches the set value, it indicates that the pretreatment is complete. The controller 3644 controls the solenoid valve 35 to open, and the pretreated mixed gas is discharged from the exhaust pipe 34 and transported to the subsequent VOC treatment equipment for deep purification treatment.

[0047] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A furniture VOC exhaust gas pretreatment device, comprising four support legs (1), characterized in that: A positioning plate (2) is fixedly connected to the upper end of each of the four support legs (1). A processing mechanism (3) is fixedly connected to the inner surface of the positioning plate (2). An air inlet pipe (4) is fixedly connected and connected inside the processing mechanism (3). A removable filter screen is installed inside the air inlet pipe (4). The processing mechanism (3) includes a processing tank (31). A tank cover (32) is fixedly connected to the upper end of the processing tank (31). A spray assembly (33) is fixedly connected to the upper end of the tank cover (32). A spray assembly (33) is fixedly connected to the inner surface of the processing tank (31). An exhaust pipe (34) is provided, and a solenoid valve (35) is provided on the outer surface of the exhaust pipe (34). A mixing component (36) is fixedly connected and communicated to the inner surface of the processing tank (31). A limit ring (37) is fixedly connected to the outer surface of the processing tank (31). A drain pipe (38) is fixedly connected and communicated to the lower end of the processing tank (31). A solenoid valve (39) is provided on the outer surface of the drain pipe (38). A pressure sensor is provided in the inner cavity of the processing tank (31). An air humidity sensor is provided in the inner cavity of the processing tank (31).

2. The furniture VOC exhaust gas pretreatment device according to claim 1, characterized in that: The spray assembly (33) includes a water pump (331), a liquid extraction pipe (332) is fixedly connected to the left end of the water pump (331), a liquid injection pipe (333) is fixedly connected to the right end of the water pump (331), a flow divider (334) is fixedly connected and communicated to the outer surface of the flow divider (334), and a plurality of spray heads (335) are fixedly connected and communicated to the inner surface of the flow divider (334).

3. The furniture VOC exhaust gas pretreatment device according to claim 1, characterized in that: The mixing component (36) includes a support plate (361), the rear end of which is fixedly connected to the front end of two support legs (1) located on the front side, a vertical plate (362) is fixedly connected to the upper end of the support plate (361), a fan (363) is fixedly connected to the front end of the vertical plate (362), and a drying component (364) is fixedly connected to the rear end of the fan (363) by bolts.

4. The furniture VOC exhaust gas pretreatment device according to claim 3, characterized in that: The drying component (364) includes a connecting pipe (3641), a connecting plate (3642) is fixedly connected to the front end of the connecting pipe (3641), the front end of the connecting plate (3642) is fixedly connected to the rear end of the fan (363) by bolts, a plurality of electric heating tubes (3643) are provided on the inner surface of the connecting pipe (3641), and a controller (3644) is fixedly connected to the upper end of the connecting pipe (3641).

5. The furniture VOC exhaust gas pretreatment device according to claim 4, characterized in that: The outer surface of the connecting pipe (3641) is fixedly connected to and communicates with the inner surface of the processing barrel (31), the inner surface of the processing barrel (31) is fixedly connected to and communicates with the outer surface of the air inlet pipe (4), and the outer surface of the processing barrel (31) is fixedly connected to the inner surface of the positioning plate (2).

6. The furniture VOC exhaust gas pretreatment device according to claim 2, characterized in that: The lower end of the water pump (331) is fixedly connected to the upper end of the bucket lid (32), and the upper end of the diverter plate (334) is fixedly connected to the lower end of the bucket lid (32).

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