Waste gas purification device of granite colored paint production line

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a waste gas purification device of a granite colored paint production line, which comprises a shell, a filtering part is arranged in the shell, the filtering part divides the inner cavity of the shell into a first cavity and a second cavity, and the shell is provided with a gas inlet, a gas outlet, a water inlet and a water outlet. The air inlet is formed in one end of the shell and communicated with the first cavity, the air outlet is formed in the top of the shell and communicated with the second cavity, the water inlet is formed in the top of the shell and communicated with the first cavity, and the water outlet is formed in the bottom of the shell and communicated with the first cavity; the air inlet assembly comprises an air inlet pipe and an air inlet pump, one end of the air inlet pipe is connected with the air inlet, and the other end of the air inlet pipe is connected with the air outlet end of the air inlet pump; the catalytic assembly comprises a light-transmitting cover, a material supplementing pipe and an ultraviolet lamp, the ultraviolet lamp is arranged in the light-transmitting cover, and the material supplementing pipe is used for supplementing the water-soluble photocatalyst. The device has the effect of purifying waste gas generated in the granite colored paint production process.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to a waste gas purification device for a granite paint production line. Background Art

[0002] During the production process of the granite paint production line, waste gas containing formaldehyde, benzene and TVOC is generated. The existing waste gas purification device of the granite paint production line only uses a fan to conduct the waste gas to the activated carbon filter for air filtration. However, the adsorption of activated carbon is affected by the temperature, humidity and air pressure of the environment. When it is saturated or nearly saturated, the ambient temperature rises or the air pressure becomes low, and the adsorbed pollutants will be released outward. Those temporarily adsorbed pollutants return to the indoor air and cause secondary pollution. These problems cause indoor air to often contain toxic and harmful gases, and these gases are difficult to remove quickly, posing a serious threat to the health of production line workers. Summary of the invention

[0003] In order to purify the waste gas generated in the production process of granite paint, the present application provides a waste gas purification device for a granite paint production line.

[0004] The waste gas purification device of the granite paint production line provided in this application adopts the following technical solution: A waste gas purification device for a granite paint production line, comprising a shell, the axis of the shell is arranged in the horizontal direction, a filter portion is arranged in the shell, the filter portion divides the inner cavity of the shell into a first cavity and a second cavity arranged in sequence along the axis direction of the shell, the shell is provided with an air inlet, an air outlet, a water inlet and a water outlet, the air inlet is arranged at one end of the shell and is connected to the first cavity, the air outlet is arranged at the top of the shell and is connected to the second cavity, the water inlet is arranged at the top of the shell and is connected to the first cavity, and the water outlet is arranged at the bottom of the shell and is connected to the first cavity; an air intake assembly, the air intake assembly comprises an air intake pipe and an air intake pump, one end of the air intake pipe is connected to the air intake, and the other end is connected to the air outlet end of the air intake pump; a catalytic assembly, the catalytic assembly comprises a light-transmitting cover arranged in the second cavity, a feeding pipe connected to the second cavity and an ultraviolet lamp arranged in the light-transmitting cover, and the feeding pipe is used to replenish a water-soluble photocatalyst.

[0005] By adopting the above technical solution, water can be injected into the shell through the water inlet, and the harmful gas and water are fully in contact. The water-soluble photocatalyst is added to the shell through the feed pipe. The water-soluble photocatalyst has a strong ability to absorb electrons under the irradiation of ultraviolet light, that is, strong oxidizing property, and can effectively catalyze and decompose harmful substances, thereby effectively degrading formaldehyde, dichlorobenzene, toluene, xylene, TVOC, etc. into non-toxic and harmless small molecule water and CO2, thereby achieving harmless treatment of waste gas. The filter part can filter out large particles of impurities in the air and keep them in the first cavity. Through the flushing of the water inlet located at the top of the first cavity, the large particles of impurities can be discharged from the water outlet located at the bottom of the first cavity.

[0006] Optionally, it also includes an air intake control component, wherein an electric three-way valve is provided at the air outlet, a first interface of the electric three-way valve is connected to the air outlet through an air outlet pipe, a second interface of the electric three-way valve is connected to the air intake pipe through an air circulation pipe, and a third interface of the electric three-way valve is connected to the outside atmosphere through an exhaust pipe, a formaldehyde detector and a pressure sensor are provided at the air outlet pipe, an air circulation pump is provided at the air circulation pipe, and a shut-off valve is provided at the air intake pipe, the shut-off valve is located upstream of the interface between the air intake pipe and the air circulation pipe, and the air intake control component is simultaneously connected to the formaldehyde detector, the electric three-way valve, the pressure sensor, the air circulation pump, the shut-off valve and the air intake pump signal.

[0007] By adopting the above technical solution, the air intake control component can automatically control the exhaust gas emission path. When it is detected that the formaldehyde release standard is not reached, the exhaust gas can be recirculated to the shell for purification again to ensure the quality of the exhausted gas. The pressure sensor can detect the pressure inside the shell to avoid accidents caused by excessive pressure inside the shell.

[0008] Optionally, the light-transmitting cover is coaxially arranged with the shell, and baffles are respectively provided on both sides of the light-transmitting cover, and the baffles divide the second cavity into a water inlet circulation chamber and a water outlet circulation chamber. The end of the shell away from the air inlet is provided with a circulating liquid inlet connected to the water inlet circulation chamber and a circulating liquid outlet connected to the water outlet circulation chamber. The circulating liquid inlet and the circulating liquid outlet are connected to each other through a liquid circulation pipe, and a liquid circulation pump is provided on the liquid circulation pipe.

[0009] By adopting the above technical solution, the light-transmitting cover and the baffle plate arranged at the center can divide the second cavity into an inlet circulation chamber and an outlet circulation chamber of equal volume. The liquid circulation pump can be used to pump the liquid in the shell from the outlet circulation chamber to the inlet circulation chamber to generate fluidity, thereby ensuring that the water-soluble photocatalyst is evenly distributed in the shell and fully contacts with the exhaust gas, thereby improving the purification efficiency.

[0010] Optionally, the baffles are disposed on the upper and lower sides of the light-transmitting cover, and the air outlet is communicated with the water inlet circulation chamber and the water outlet circulation chamber at the same time.

[0011] By adopting the above technical solution, the baffles arranged on the upper and lower sides of the light-transmitting cover, that is, the baffles arranged in the vertical direction can make the water inlet circulation chamber and the water outlet circulation chamber symmetrical on the left and right, so that the liquid level heights in the water inlet circulation chamber and the water outlet circulation chamber are the same. At the same time, the air outlet connected to the water inlet circulation chamber and the water outlet circulation chamber can ensure that the air outlet efficiency of the water inlet circulation chamber and the water outlet circulation chamber is the same, thereby reducing the pressure difference between the two chambers.

[0012] Optionally, it also includes a water inlet control component and an alarm, the water inlet is connected to a pure water source through a water inlet pipe, a water pump is provided at the water inlet pipe, a water outlet is provided at the water outlet, a solenoid valve is provided at the water outlet pipe, the air outlet pipe is arranged in a vertical direction, a first liquid level sensor is provided at one end of the air outlet pipe close to the air outlet, a second liquid level sensor is provided at a height of 0.8-0.9 of the first cavity, and the water inlet control component is simultaneously connected to the first liquid level sensor, the second liquid level sensor, the water pump, the alarm and the solenoid valve signal.

[0013] By adopting the above technical solution, the control component can monitor the water level inside the shell in real time, thereby accurately controlling the pumping of pure water and the discharge of waste water, ensuring the efficient and safe operation of the device.

[0014] Optionally, the air inlet is arranged at the bottom of one end of the shell close to the first cavity.

[0015] By adopting the above technical solution, the air inlet located close to the bottom is conducive to the full mixing of exhaust gas and water.

[0016] Optionally, the feed pipe is connected to the water inlet circulation chamber.

[0017] By adopting the above technical solution, the liquid in the water inlet circulation chamber flows toward the air inlet, and the feed pipe connected to the water inlet circulation chamber can ensure that the water-soluble photocatalyst is fully in contact with the exhaust gas entering from the air inlet, thereby improving the purification efficiency.

[0018] Optionally, a plurality of spoilers are provided in the water inlet circulation chamber and the water outlet circulation chamber, and the spoilers are simultaneously connected to one of the two baffles, the shell and the light-transmitting cover, and two adjacent spoilers are respectively connected to different baffles, and the spoilers, the baffles, the shell and the light-transmitting cover together form a liquid flow channel.

[0019] By adopting the above technical solution, the spoiler can increase the length of the flow path of the liquid in the water inlet circulation chamber and the water outlet circulation chamber and reduce the cross-sectional size of the flow path, so that the exhaust gas can be fully mixed with the liquid.

[0020] Optionally, the spoiler is arranged at an angle to the vertical direction.

[0021] By adopting the above technical solution, the spoiler arranged at an angle can further increase the length of the flow path of the liquid in the water inlet circulation chamber and the water outlet circulation chamber.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The water-soluble photocatalyst can decompose harmful gases such as formaldehyde into water and carbon dioxide. The chemical decomposition method replaces the previous physical filtration, realizes the function of purifying waste gas and avoids the saturated emission of waste gas; 2. By setting up an air intake control component, the air intake control component receives the signals transmitted by the formaldehyde detector and the pressure sensor, thereby controlling the electric three-way valve, the air circulation pump and the air intake pump, thereby forming an exhaust gas treatment system that can automatically control the formaldehyde treatment degree and emission, ensuring the quality of the treated exhaust gas; 3. By setting up a water inlet control component, the water inlet control component receives the signals transmitted by the first liquid level sensor and the second liquid level sensor, thereby controlling the water pump and the solenoid valve, thereby forming a water supply and drainage system that can automatically control the height of the liquid level in the shell, thereby ensuring the height of the liquid level in the shell; 4. The photocatalyst is driven by water flow to circulate in the second cavity, and the spoiler increases the contact area and time between the exhaust gas and the water-soluble photocatalyst, further improving the exhaust gas treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of an exhaust gas purification device for a granite paint production line provided in an embodiment of the present application; Figure 2 It is a schematic diagram of the internal structure of the exhaust gas purification device of the granite paint production line provided in the embodiment of the present application.

[0024] Explanation of the reference numerals: 1-shell; 101-first cavity; 102-second cavity; 1021-water circulation chamber; 103-filter; 2-air inlet; 3-air outlet; 4-water inlet; 5-water outlet; 6-air inlet pipe; 7-air inlet pump; 8-light-transmitting cover; 9-feeding pipe; 10-electric three-way valve; 11-air outlet pipe; 12-pressure sensor; 13-formaldehyde detector; 14-air circulation pipe; 15-air circulation pump; 16-discharge pipe; 17-shut-off valve; 18-baffle; 19-circulating liquid outlet; 20-circulating liquid inlet; 21-liquid circulation pipe; 22-liquid circulation pump; 23-first liquid level sensor; 24-second liquid level sensor; 25-spoiler. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-2 This application is described in further detail.

[0026] The embodiment of the present application discloses an exhaust gas purification device for a granite paint production line.

[0027] like Figure 1 and Figure 2 As shown, the exhaust gas purification device of the granite paint production line includes a shell 1, the axis of the shell 1 is arranged in the horizontal direction, and a filter part 103 is arranged in the shell 1. The filter part 103 divides the inner cavity of the shell 1 into a first cavity 101 and a second cavity 102 arranged in sequence along the axis direction of the shell 1. The shell 1 is provided with an air inlet 2, an air outlet 3, a water inlet 4 and a water outlet 5. The water inlet 4 is arranged at the top of the shell 1 and is connected to the first cavity 101. The water outlet 5 is arranged at the bottom of the shell 1 and is connected to the first cavity 101. In order to ensure the exhaust gas and water Fully mixed, the air inlet 2 is arranged at the bottom of the shell 1 near one end of the first cavity 101, and the air outlet 3 is arranged at the top of the shell 1 and connected to the second cavity 102; the air intake component, the air intake component includes an air intake pipe 6 and an air intake pump 7, one end of the air intake pipe 6 is connected to the air inlet 2, and the other end is connected to the air outlet end of the air intake pump 7; the catalytic component, the catalytic component includes a light-transmitting cover 8 arranged in the second cavity 102, a feed pipe 9 connected to the second cavity 102, and an ultraviolet lamp arranged in the light-transmitting cover 8, and the feed pipe 9 is used to replenish the water-soluble photocatalyst. In this embodiment, the main component of the water-soluble photocatalyst is 5nm water-soluble titanium dioxide powder.

[0028] The water inlet 4 can be used to inject water into the housing 1, and the air pump 7 can be used to pump the harmful gases generated during the production process of the granite paint production line into the housing 1. Since water is pre-injected into the housing 1, the harmful gases can fully contact the water. The water-soluble photocatalyst is added to the housing 1 by the feed pipe 9. The water-soluble photocatalyst has a strong ability to absorb electrons under the irradiation of the ultraviolet lamp, that is, strong oxidizing properties, and can effectively catalyze and decompose harmful substances, thereby effectively degrading formaldehyde, dichlorobenzene, toluene, xylene, TVOC, etc. into non-toxic and harmless small molecular water and CO2, thereby achieving harmless treatment of the waste gas. The filter unit 103 can filter out large particles of impurities in the air and leave them in the first cavity 101. In this embodiment, the filter unit 103 can use an activated carbon filter. The activated carbon filter can intercept large particles of impurities in the first cavity 101 on the one hand, and can adsorb most of the benzene and TVOC in the waste gas, as well as a small part of formaldehyde on the other hand. The large particles of impurities retained in the first cavity 101 can be flushed by the water inlet 4 located at the top of the first cavity 101 and discharged from the water outlet 5 located at the bottom of the first cavity 101. The activated carbon adsorbed with formaldehyde, benzene and TVOC is immersed in water containing a water-soluble photocatalyst. The strong oxidizing property of the water-soluble photocatalyst under the irradiation of an ultraviolet lamp can continuously decompose the formaldehyde, benzene and TVOC at the activated carbon filter, so that it is never in a saturated state, so as to achieve recycling and avoid the replacement of the filter unit 103.

[0029] like Figure 1 and Figure 2 As shown, in order to automatically control the exhaust path of the exhaust gas, the exhaust gas purification device of the granite paint production line provided in this embodiment also includes an air intake control component. An electric three-way valve 10 is provided at the air outlet 3, the first interface of the electric three-way valve 10 is connected to the air outlet 3 through the air outlet pipe 11, the second interface of the electric three-way valve 10 is connected to the air intake pipe 6 through the air circulation pipe 14, and the third interface of the electric three-way valve 10 is connected to the outside atmosphere through the exhaust pipe 16. A formaldehyde detector 13 and a pressure sensor 12 are provided at the air outlet pipe 11, an air circulation pump 15 is provided at the air circulation pipe 14, and a shut-off valve 17 is provided at the air intake pipe 6. The shut-off valve 17 is located upstream of the interface between the air intake pipe 6 and the air circulation pipe 14. The air intake control component is simultaneously connected to the formaldehyde detector 13, the electric three-way valve 10, the pressure sensor 12, the air circulation pump 15, the shut-off valve 17 and the air intake pump 7.

[0030] The electric three-way valve 10 has two working modes, namely, a circulation mode and a discharge mode. In the circulation mode, the first interface is connected to the second interface, and the third interface is closed; in the discharge mode, the first interface is connected to the third interface, and the second interface is closed.

[0031] When the formaldehyde detector 13 detects that the formaldehyde content of the gas in the outlet pipe 11 does not meet the emission standard, the air intake control component controls the electric three-way valve 10 to switch to the circulation mode, and the exhaust gas enters the housing 1 from the air intake port 2, and leaves the housing 1 from the air outlet port 3, and arrives at the first interface of the electric three-way valve 10 through the air outlet pipe 11. Since the first interface is connected to the second interface at this time, the third interface is closed, and the gas leaves the electric three-way valve 10 from the second interface, returns to the air intake pipe 6 through the air circulation pipe 14, and merges with the exhaust gas pumped into the air intake pipe 6 by the air intake pump 7, and returns to the housing 1. If the pressure sensor 12 detects that the pressure in the housing 1 is too high at this time, the air intake control component controls the air intake pump 7 to stop working, closes the shut-off valve 17, and starts the air circulation pump 15 at the same time. Under the action of the air circulation pump 15, the gas at the top of the housing 1 arrives at the first interface of the electric three-way valve 10 through the air outlet pipe 11, and the gas leaves the electric three-way valve 10 from the second interface, returns to the air intake pipe 6 through the air circulation pipe 14, and returns to the housing 1.

[0032] When the formaldehyde detector 13 detects that the formaldehyde content of the gas in the outlet pipe 11 meets the emission standard, the air intake control component controls the electric three-way valve 10 to switch to the emission mode and closes the air circulation pump 15. Since the pressure in the shell 1 is greater than the external air pressure at this time, the gas at the top of the shell 1 leaves the shell 1 from the outlet 3 under the action of pressure, and comes to the first interface of the electric three-way valve 10 through the outlet pipe 11. Since the first interface is connected to the third interface at this time and the second interface is closed, the gas leaves the electric three-way valve 10 from the third interface and is discharged to the outside atmosphere through the emission pipe 16.

[0033] like Figure 1 and Figure 2 As shown, the light-transmitting cover 8 is coaxially arranged with the shell 1, and baffles 18 arranged in the vertical direction are respectively provided on the upper and lower sides of the light-transmitting cover 8, and the baffle 18 divides the second cavity 102 into a water inlet circulation chamber and a water outlet circulation chamber 1021, and the air outlet 3 is connected with the water inlet circulation chamber and the water outlet circulation chamber 1021 at the same time, and the end of the shell 1 away from the air inlet 2 is provided with a circulating liquid inlet 20 connected with the water inlet circulation chamber and a circulating liquid outlet 19 connected with the water outlet circulation chamber 1021, and the circulating liquid inlet 20 is connected with the circulating liquid outlet 19 through a liquid circulation pipe 21, and a liquid circulation pump 22 is provided on the liquid circulation pipe 21.

[0034] The light-transmitting cover 8 disposed at the center and the baffles 18 disposed at the upper and lower sides of the light-transmitting cover 8 can divide the second cavity 102 into a water inlet circulation chamber and a water outlet circulation chamber 1021 of equal volume and left-right symmetry. The liquid levels in the left-right symmetric water inlet circulation chamber and water outlet circulation chamber 1021 are at the same height. The liquid circulation pump 22 can pump the liquid in the housing 1 from the water outlet circulation chamber 1021 to the water inlet circulation chamber to generate fluidity, so as to ensure that the water-soluble photocatalyst is evenly distributed in the housing 1 and fully contacts with the exhaust gas, thereby improving the purification efficiency. At the same time, the air outlet 3 connected to the water inlet circulation chamber and the water outlet circulation chamber 1021 can ensure that the air outlet efficiency of the water inlet circulation chamber and the water outlet circulation chamber 1021 is the same, thereby reducing the pressure difference between the two chambers.

[0035] In addition, since the liquid in the water inlet circulation chamber flows toward the air inlet 2, the feed pipe 9 is connected to the water inlet circulation chamber, which can ensure that the water-soluble photocatalyst is fully in contact with the exhaust gas entering from the air inlet 2, thereby improving the purification efficiency.

[0036] like Figure 1 and Figure 2 As shown, in order to monitor the water level inside the housing 1 in real time, the waste gas purification device of the granite paint production line provided in this embodiment also includes a water inlet control component and an alarm. The water inlet 4 is connected to the pure water source through a water inlet pipe, a water pump (not shown in the figure) is provided at the water inlet pipe, and a solenoid valve (not shown in the figure) is provided at the water outlet pipe. The air outlet pipe 11 is arranged in the vertical direction, and a first liquid level sensor 23 is provided at one end of the air outlet pipe 11 close to the air outlet 3. A second liquid level sensor 24 is provided at a height of 0.8-0.9 of the first cavity 101, where 0.8 and 0.9 refer to the ratio of the height of the first cavity. The water inlet control component is simultaneously connected to the first liquid level sensor 23, the second liquid level sensor 24, the water pump and the solenoid valve signal.

[0037] The first liquid level sensor 23 and the second liquid level sensor 24 work together to detect the liquid level in the housing 1. When the first liquid level sensor 23 and the second liquid level sensor 24 continuously and simultaneously detect that there is liquid at the location, it means that the liquid level in the housing 1 is too high. The water inlet control component controls the solenoid valve to open and controls the water pump to start. The water pump runs at low power at this time, flushing the first cavity 101 while draining water. After maintaining this state for a period of time, the water inlet control component controls the solenoid valve to close and increases the water pump power to add pure water to the housing 1 until the second liquid level sensor 24 detects that there is liquid at the location. The water inlet control component controls the water pump to stop running and controls the alarm to start, prompting the operator to add a large amount of water-soluble photocatalyst. The height of the first liquid level sensor 23 and the second liquid level sensor 24 enables the housing 1 to always maintain a certain amount of gas at the top, so that the gas can be smoothly discharged from the air outlet 3.

[0038] like Figure 1 and Figure 2 As shown, a plurality of spoilers 25 arranged at an angle to the vertical direction are also provided in the water inlet circulation chamber and the water outlet circulation chamber 1021. The spoilers 25 are simultaneously connected to one of the two baffles 18, the housing 1 and the light-transmitting cover 8. Two adjacent spoilers 25 are respectively connected to different baffles 18. The spoilers 25, the baffles 18, the housing 1 and the light-transmitting cover 8 together form a liquid flow channel. The S-shaped liquid flow channel can increase the length of the flow path of the liquid in the water inlet circulation chamber and the water outlet circulation chamber 1021, and reduce the cross-sectional size of the flow path, so that the exhaust gas can be fully mixed with the liquid.

[0039] The implementation principle of the exhaust gas purification device of a granite paint production line in the embodiment of the present application is: Water can be injected into the shell 1 by using the water inlet 4, and harmful gases generated during the production process of the granite paint production line can be pumped into the first cavity 101 of the shell 1 by using the air intake pump 7. Since water is pre-injected into the shell 1, the liquid in the shell 1 can be pumped from the water outlet circulation chamber 1021 to the water inlet circulation chamber by the liquid circulation pump 22 to generate fluidity, so that the harmful gas can fully contact with the water, and the water-soluble photocatalyst is added to the shell 1 by using the feed pipe 9. The water-soluble photocatalyst has a strong ability to absorb electrons under the irradiation of ultraviolet light, that is, it has strong oxidizing properties and can effectively catalyze the decomposition of harmful substances, thereby effectively degrading formaldehyde, dichlorobenzene, toluene, xylene, TVOC, etc. into non-toxic and harmless small molecule water and CO2, thereby achieving harmless treatment of the exhaust gas and discharging the treated gas from the exhaust pipe 11.

[0040] The formaldehyde detector 13 can detect whether the formaldehyde content of the gas in the outlet pipe 11 meets the emission standard. When it meets the emission standard, the air intake control component controls the electric three-way valve 10 to switch to the emission mode, and discharges the treated gas to the outside atmosphere; when it does not meet the emission standard, the air intake control component controls the electric three-way valve 10 to switch to the circulation mode, so that the treated gas returns to the intake pipe 6 through the air circulation pipe 14 and the exhaust gas pumped into the intake pipe 6 by the intake pump 7, and returns to the housing 1. If the pressure sensor 12 detects that the pressure in the housing 1 is too high at this time, the air intake control component can control the intake pump 7 to stop running, and start the air circulation pump 15, so that the treated gas can return to the intake pipe 6 through the air circulation pipe 14 under the action of the air circulation pump 15, and return to the housing 1.

[0041] Since water is continuously generated during the treatment process, the liquid level in the shell 1 will increase. The first liquid level sensor 23 and the second liquid level sensor 24 can work together to detect the liquid level height in the shell 1. When the first liquid level sensor 23 and the second liquid level sensor 24 continue to detect the presence of liquid at the same time, it means that the liquid level in the shell 1 is too high. The water inlet control component controls the solenoid valve to open and the water pump to start. The water pump runs at low power at this time to flush the first cavity 101 while draining water. After maintaining this state for a period of time, the water inlet control component controls the solenoid valve to close and increases the water pump power to add pure water to the shell 1. Until the second liquid level sensor 24 detects the presence of liquid at the location, the water inlet control component controls the water pump to stop running and controls the alarm to start, prompting the operator to add a large amount of water-soluble photocatalyst.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An exhaust gas purification device for a granite paint production line, characterized in that: include: A shell (1), wherein the axis of the shell (1) is arranged in a horizontal direction, a filter portion (103) is arranged in the shell (1), and the filter portion (103) divides the inner cavity of the shell (1) into a first cavity (101) and a second cavity (102) arranged in sequence along the axis direction of the shell (1), and the shell (1) is provided with an air inlet (2), an air outlet (3), a water inlet (4) and a water outlet (5), the air inlet (2) being arranged at one end of the shell (1) and being connected to the first cavity (101), the air outlet (3) being arranged at the top of the shell (1) and being connected to the second cavity (102), the water inlet (4) being arranged at the top of the shell (1) and being connected to the first cavity (101), and the water outlet (5) being arranged at the bottom of the shell (1) and being connected to the first cavity (101); An air intake assembly, the air intake assembly comprising an air intake pipe (6) and an air intake pump (7), one end of the air intake pipe (6) being connected to the air inlet (2), and the other end being connected to the air outlet end of the air intake pump (7); A catalytic component, the catalytic component comprising a light-transmitting cover (8) arranged in the second cavity (102), a feeding pipe (9) connected to the second cavity (102), and an ultraviolet lamp arranged in the light-transmitting cover (8), wherein the feeding pipe (9) is used to replenish the water-soluble photocatalyst.

2. The exhaust gas purification device for the granite paint production line according to claim 1 is characterized in that: The invention also comprises an air intake control component, wherein an electric three-way valve (10) is provided at the air outlet (3), a first interface of the electric three-way valve (10) is connected to the air outlet (3) via an air outlet pipe (11), a second interface of the electric three-way valve (10) is connected to the air intake pipe (6) via an air circulation pipe (14), a third interface of the electric three-way valve (10) is connected to the outside atmosphere via an exhaust pipe (16), and a formaldehyde detector (13) and a pressure sensor are provided at the air outlet pipe (11). The air circulation pipe (14) is provided with an air circulation pump (15), the air intake pipe (6) is provided with a shut-off valve (17), the shut-off valve (17) is located upstream of the interface between the air intake pipe (6) and the air circulation pipe (14), and the air intake control component is simultaneously connected to the formaldehyde detector (13), the electric three-way valve (10), the pressure sensor (12), the air circulation pump (15), the shut-off valve (17) and the air intake pump (7) by signals.

3. The waste gas purification device for the granite paint production line according to claim 2 is characterized in that: The light-transmitting cover (8) is coaxially arranged with the shell (1), and baffles (18) are respectively provided on both sides of the light-transmitting cover (8), and the baffles (18) divide the second cavity (102) into a water inlet circulation chamber and a water outlet circulation chamber (1021). The end of the shell (1) away from the air inlet (2) is provided with a circulating liquid inlet (20) connected to the water inlet circulation chamber and a circulating liquid outlet (19) connected to the water outlet circulation chamber (1021), and the circulating liquid inlet (20) is connected to the circulating liquid outlet (19) through a liquid circulation pipe (21), and a liquid circulation pump (22) is provided on the liquid circulation pipe (21).

4. The waste gas purification device for the granite paint production line according to claim 3 is characterized in that: The baffles (18) are arranged at the upper and lower sides of the light-transmitting cover (8), and the air outlet (3) is simultaneously connected to the water inlet circulation chamber and the water outlet circulation chamber (1021).

5. The exhaust gas purification device for the granite paint production line according to claim 4 is characterized in that: The invention also comprises a water inlet control component and an alarm, wherein the water inlet (4) is connected to a pure water source via a water inlet pipe, a water pump is provided at the water inlet pipe, a water outlet pipe is provided at the water outlet (5), a solenoid valve is provided at the water outlet pipe, the air outlet pipe (11) is arranged in a vertical direction, a first liquid level sensor (23) is provided at one end of the air outlet pipe (11) close to the air outlet (3), a second liquid level sensor (24) is provided at a height of 0.8-0.9 of the first cavity (101), and the water inlet control component is simultaneously connected to the first liquid level sensor (23), the second liquid level sensor (24), the water pump, the alarm and the solenoid valve signal.

6. The exhaust gas purification device for the granite paint production line according to claim 4 is characterized in that: The air inlet (2) is arranged at the bottom of one end of the shell (1) close to the first cavity (101).

7. The exhaust gas purification device for the granite paint production line according to claim 4 is characterized in that: The feed pipe (9) is communicated with the water inlet circulation chamber.

8. The waste gas purification device for the granite paint production line according to claim 4 is characterized in that: A plurality of spoilers (25) are also provided in the water inlet circulation chamber and the water outlet circulation chamber (1021); the spoilers (25) are simultaneously connected to one of the two baffles (18), the shell (1) and the light-transmitting cover (8); two adjacent spoilers (25) are respectively connected to different baffles (18); the spoilers (25), the baffles (18), the shell (1) and the light-transmitting cover (8) together form a liquid flow channel.

9. The waste gas purification device for the granite paint production line according to claim 8, characterized in that: The spoiler (25) is arranged at an angle to the vertical direction.

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