A mobile paint mixing equipment with exhaust gas adsorption and desorption treatment function

Abstract

The present invention proposes a movable paint mixing equipment with waste gas adsorption and desorption treatment function, including paint mixing equipment, an adsorption device for absorbing waste gas from paint mixing installed in the paint mixing equipment, an air inlet end and an air outlet end in the adsorption device are respectively connected to a return pipe and an exhaust pipe of a desorption regeneration system, an exhaust gas purification component is connected between the exhaust pipe and the return pipe, and the exhaust gas purification component includes a primary heat exchanger and a secondary heat exchanger connected to each other. The present invention provides a system equipment for paint mixing, waste gas adsorption, waste gas desorption, and waste gas regeneration or emission after desorption designed for an outdoor paint spraying operation environment. While exhausting waste gas, fresh air with suitable temperature and humidity is input into the paint mixing area to maximize the quality of the air breathed by the paint mixing workers. The paint mixing equipment is produced in containers for easy shipping, and is detachably connected to the adsorption device. One set of adsorption equipment can perform waste gas desorption and regeneration treatment for multiple sets of paint mixing equipment, which is highly efficient, energy-saving and environmentally friendly.

Description

Technical Field

[0001] The invention relates to the field of waste gas purification, and in particular to a movable paint mixing equipment with waste gas adsorption and desorption processing functions. Background Art

[0002] VOCs, volatile organic compounds, are a class of important gaseous pollutants that are widely present in the atmosphere. According to the definition of the World Health Organization (WHO, 1989), they are various organic compounds with a boiling point of 50℃ to 260℃ at room temperature. VOCs not only have a direct impact on human health and the ecological environment, but also can participate in atmospheric photochemical reactions to generate secondary pollutants, such as ozone, peroxyacetyl nitrate, organic aerosols, etc., which we often mention. It is one of the important precursors to air pollution.

[0003] For outdoor painting operations with variable working areas, paint mixing needs to be done nearby. However, some paint mixing is currently done outdoors, and the VOCs generated during the paint mixing process are directly discharged into the atmosphere, causing serious atmospheric pollution and not meeting the requirements of the "Volatile Organic Compounds Unorganized Emission Control Standard" (GB37822-2019). Therefore, a relatively closed paint mixing room and supporting facilities are needed to meet the needs of outdoor paint mixing operations.

[0004] Paint itself is flammable and explosive, so the equipment configuration in the paint mixing area should be considered as explosion-proof area. However, the paint mixing equipment on the market currently lacks safety protection measures, which poses great safety hazards. At the same time, the paint mixing operation area is not properly designed for supply and exhaust ventilation and temperature and humidity control, resulting in a poor paint mixing operation environment, which may even affect the quality of paint mixing.

[0005] Existing waste gas treatment modules for paint mixing devices all use adsorption methods. However, the desorption and regeneration of the adsorbent material is not considered, or it can only be desorbed in situ (i.e., the adsorbent material needs to be taken out and sent to the desorption device for regeneration before being reloaded), which is complicated to operate, requires a lot of maintenance work, and is costly. Summary of the invention

[0006] The present invention provides a movable paint mixing equipment with waste gas adsorption and desorption processing functions, which solves the problems in the prior art.

[0007] The technical solution of the present invention is achieved in this way:

[0008] A movable paint mixing equipment with built-in exhaust gas adsorption and desorption treatment function includes a paint mixing equipment, wherein an adsorption equipment for absorbing paint mixing exhaust gas is installed in the paint mixing equipment, the air inlet end and the air outlet end in the adsorption equipment are respectively connected to a return pipe and an exhaust pipe of a desorption regeneration system, an exhaust gas purification component is connected between the exhaust pipe and the return pipe, and the exhaust gas purification component includes a primary heat exchanger and a secondary heat exchanger connected to each other.

[0009] Preferably, the return pipe comprises a first pipe whose starting end is connected to an exhaust pipe;

[0010] The first pipeline is provided with a hot air recycling valve and a first fresh air dilution valve in sequence;

[0011] The terminal end of the first pipeline is connected to the fourth interface of the primary heat exchanger;

[0012] The third interface of the primary heat exchanger is connected to the first interface of the secondary heat exchanger.

[0013] Preferably, the reflux pipeline includes a second pipeline whose starting end is connected to the first interface of the primary heat exchanger;

[0014] The second pipeline is sequentially provided with a temperature detection controller, a first three-way valve and a desorption inlet valve;

[0015] The terminal end of the second pipeline is connected to the air inlet end.

[0016] Preferably, the air extraction pipeline includes a third pipeline, and the starting end of the third pipeline is connected to the air outlet end;

[0017] The third pipeline is provided with a desorption outlet valve, a second three-way valve, a flame arrester and a second combustible gas detection alarm device in sequence;

[0018] The terminal end of the third pipeline is connected to the third interface of the secondary heat exchanger.

[0019] Preferably, a connecting pipe is connected between the first tee and the second tee, and a circulation valve is provided on the connecting pipe.

[0020] Preferably, the second interface of the secondary heat exchanger is connected to the second fresh air dilution valve, the heating chamber and the catalytic oxidation chamber in sequence, and the discharge end of the catalytic oxidation chamber is connected to the second interface of the primary heat exchanger.

[0021] Preferably, the first interface of the secondary heat exchanger is connected to the third interface of the primary heat exchanger, the fourth interface of the secondary heat exchanger is connected to a desorption fan, and the air outlet of the desorption fan is connected to the exhaust duct.

[0022] Preferably, the air inlet and the air outlet of the adsorption device are respectively arranged on two parallel mounting walls of the paint mixing device, and the adsorption device divides the interior of the paint mixing device into an adsorption device cavity, and a paint mixing operation cavity and an equipment cavity on the left and right sides of the adsorption device through two parallel adsorption device walls;

[0023] An adsorption bed is sandwiched between the walls of the two adsorption devices.

[0024] Preferably, an industrial air conditioner, a blower and an exhaust fan are installed in the equipment cavity;

[0025] The air inlet pipe of the industrial air conditioner is arranged on the wall surface of the equipment cavity;

[0026] The air inlet of the exhaust fan is arranged on the wall of the adsorption device close to the device cavity;

[0027] The air outlet of the exhaust fan is arranged on the wall surface of the equipment cavity;

[0028] An exhaust gas inlet is arranged on the wall surface of the adsorption equipment close to the paint mixing operation chamber, and a pre-filtering module is arranged on the exhaust gas inlet.

[0029] Preferably, an air supply pipeline system runs through the adsorption device, the air outlet of the air supply pipeline system is arranged in the paint mixing operation chamber, and the air inlet of the air supply pipeline system is connected to the air blower.

[0030] Beneficial effects:

[0031] A movable paint mixing equipment with waste gas adsorption and desorption treatment function includes a paint mixing equipment, an adsorption device for absorbing waste gas from paint mixing is installed in the paint mixing equipment, the air inlet and the air outlet in the adsorption device are respectively connected to a return pipe and an exhaust pipe of a desorption regeneration system, and an exhaust gas purification component is connected between the exhaust pipe and the return pipe, and the exhaust gas purification component includes a primary heat exchanger and a secondary heat exchanger connected to each other. The present invention provides a system equipment for paint mixing, waste gas adsorption, waste gas desorption, and waste gas regeneration or emission after desorption designed for an outdoor paint spraying operation environment, which can timely collect and treat the waste gas generated during the paint mixing process to prevent waste gas leakage from causing damage to the environment. While exhausting the waste gas, fresh air with suitable temperature and humidity is input into the paint mixing area to maximize the quality of the air breathed by the paint mixing workers. The paint mixing equipment is produced in containers, which is convenient for consignment and can be detachably connected to the adsorption equipment. One set of adsorption equipment can perform waste gas desorption and regeneration treatment for multiple sets of paint mixing equipment, which is efficient, energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a schematic diagram of the structure of the device of the present invention;

[0034] Figure 2 This is a schematic diagram of the top view of the paint mixing equipment of the present invention;

[0035] Figure 3 This is a schematic diagram of the main structure of the paint mixing equipment of the present invention;

[0036] Figure 4 For the present invention Figure 3 Middle AA side view;

[0037] Figure 5 It is a schematic diagram of the structure of the desorption regeneration system of the present invention. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figure 1-5 A movable paint mixing equipment 100 with built-in waste gas adsorption and desorption treatment function includes a paint mixing equipment 100, in which an adsorption device for absorbing waste gas from paint mixing is installed, and an air inlet end and an air outlet end in the adsorption device are respectively connected to a return pipe 400 and an exhaust pipe 300 of a desorption regeneration system 200, and an exhaust gas purification component is connected between the exhaust pipe 300 and the return pipe 400, and the exhaust gas purification component includes a first-level heat exchanger 202 and a second-level heat exchanger 211 connected to each other.

[0040] The return pipe 400 includes a first pipe whose starting end is connected to an exhaust pipe 217; a hot air recycling valve 218 and a first fresh air dilution valve 201 are sequentially arranged on the first pipe; the terminal end of the first pipe is connected to the fourth interface of the primary heat exchanger 202; the third interface of the primary heat exchanger 202 is connected to the first interface of the secondary heat exchanger 211. The return pipe 400 includes a second pipe whose starting end is connected to the first interface of the primary heat exchanger 202; a temperature detection controller 203, a first three-way valve and a desorption inlet valve 204 are sequentially arranged on the second pipe; the terminal end of the second pipe is connected to the air inlet. The exhaust pipe 300 includes a third pipe, and the starting end of the third pipe is connected to the air outlet;

[0041] The third pipeline is provided with a desorption outlet valve 208, a second three-way valve, a flame arrester 209 and a second combustible gas detection alarm device 210 in sequence; the terminal end of the third pipeline is connected to the third interface of the secondary heat exchanger 211. A connecting pipe is connected between the first three-way valve and the second three-way valve, and a circulation valve 207 is provided on the connecting pipe.

[0042] The second interface of the secondary heat exchanger 211 is connected to the second fresh air dilution valve 212 , the heating chamber 213 and the catalytic oxidation chamber 215 in sequence, and the discharge end of the catalytic oxidation chamber 215 is connected to the second interface of the primary heat exchanger 202 .

[0043] The first interface of the secondary heat exchanger 211 is connected to the third interface of the primary heat exchanger 202 , the fourth interface of the secondary heat exchanger 211 is connected to a desorption fan, and the air outlet of the desorption fan is connected to the exhaust duct 217 .

[0044] When the adsorption material in the paint mixing equipment 100 is saturated, the inlet and outlet of the adsorption bed are connected to the desorption inlet and outlet of the adsorption equipment. First, the adsorption equipment is turned on and enters the preheating program. When the equipment temperature reaches the set temperature, the desorption inlet and outlet valves of the adsorption equipment are opened to start hot air desorption regeneration of the adsorption material.

[0045] The VOCs adsorbed on the surface of the material are thermally analyzed by high-temperature air, and the desorbed VOCs are transported to the adsorption equipment by hot air for catalytic oxidation and decomposition into CO2 and H2O. The purified VOCs waste gas is recycled through the primary and secondary heat exchangers, and part of it is discharged through the exhaust pipe, and the other part is circulated to the cold side inlet of the primary heat exchanger, and after heating, it returns to the adsorption bed for high-temperature desorption. This cycle is repeated until the VOCs in the adsorption material are completely desorbed.

[0046] When the adsorption material in the waste gas treatment equipment is saturated, the inlet and outlet of the adsorption bed 108 are connected to the desorption outlet interface 206 and the desorption inlet interface 205 of the desorption regeneration system respectively. First, the desorption regeneration system circulation valve 207 and the hot air recycling valve 218 are opened, the desorption inlet valve 204 and the desorption outlet valve 208 are closed, the first fresh air dilution valve 201 and the second fresh air dilution valve 212 are closed, and the desorption fan 216 and the electric heater of the heating chamber 213 are turned on, and the equipment enters the preheating procedure.

[0047] At this time, the air is slowly heated by circulation inside the equipment. When the temperature of the heating chamber reaches 260℃~300℃, the equipment preheating is completed. At this time, the circulation valve 207 is closed, and the desorption inlet valve 204 and the desorption outlet valve 208 are opened, and the equipment officially starts to desorb and regenerate the adsorption material. At this time, the hot air in the exhaust pipe enters the cold side of the first heat exchanger 202 through the hot air recycling pipeline, and is further heated to the specified desorption temperature (depending on different adsorption materials), and then enters the adsorption material bed, and the VOCs adsorbed in the adsorption material are desorbed and analyzed at high temperature, and then sent to the desorption outlet, and then enter the cold side of the second heat exchanger after passing through the flame arrester 209, and then sent to the heating chamber. After the exhaust gas temperature is raised to 260℃~300℃ in the heating chamber, it is sent to the catalytic oxidation chamber, and the VOCs are catalytically oxidized into CO2 and H2O under high temperature conditions by the precious metal catalyst, and then sent to the hot side of the first heat exchanger 202 and the hot side of the second heat exchanger 211 for heat recycling, and then discharged to the exhaust pipe 217 through the desorption fan 216. At this time, part of the hot air will enter the hot air recycling pipe again due to the suction effect of the desorption fan 216. So far, a desorption cycle has been completed.

[0048] The equipment is equipped with temperature detection controllers 203 at the cold side outlet of the first-stage heat exchanger 202, the cold side inlet of the second-stage heat exchanger 211, the heating chamber 213, the catalytic oxidation chamber 215, and the hot side outlet of the second-stage heat exchanger 211, and cooperates with the fresh air dilution valve, heater and other facilities to ensure that the temperature of each process point of the equipment is within the set range.

[0049] At the same time, the equipment is equipped with a combustible gas detection and alarm device 210 on the desorption outlet pipeline. When it is detected that the desorbed VOCs waste gas exceeds the lower explosion limit of 25%, the corresponding fresh air dilution valve is opened to ensure the safe and stable operation of the equipment.

[0050] The desorption regeneration system is provided with a pressure difference detection instrument 214 on both sides of the catalyst layer of the catalytic oxidation chamber 215. When it is detected that the pressure difference reaches the set pressure difference alarm value, it reminds to clean the catalyst.

[0051] The air inlet and air outlet of the adsorption device are respectively arranged on two parallel mounting walls of the paint mixing device 100. The adsorption device divides the interior of the paint mixing device 100 into an adsorption device cavity and a paint mixing operation cavity and a device cavity on the left and right sides of the adsorption device through two parallel adsorption device walls.

[0052] An adsorption bed 108 is sandwiched between the two adsorption device walls.

[0053] An industrial air conditioner 115, a blower 114 and an exhaust fan 110 are installed in the equipment cavity;

[0054] The air inlet pipe of the industrial air conditioner 115 is arranged on the wall surface of the equipment cavity;

[0055] The air inlet of the exhaust fan 110 is arranged on the wall of the adsorption device close to the device cavity;

[0056] The exhaust port 119 of the exhaust fan 110 is arranged on the wall surface of the equipment cavity;

[0057] An exhaust gas inlet is arranged on the wall of the adsorption equipment close to the paint mixing operation chamber, and a pre-filter module 107 is arranged on the exhaust gas inlet.

[0058] An air supply pipeline system 106 runs through the adsorption equipment, the air outlet of the air supply pipeline system 106 is arranged in the paint mixing operation chamber, and the air inlet of the air supply pipeline system 106 is connected to the air supply fan 114.

[0059] Example 1

[0060] A paint mixing operation area, an exhaust gas adsorption area and an equipment area are sequentially arranged in the device along the long side direction. The exhaust gas adsorption area includes a pre-filtration structure and an adsorption structure for filtering and adsorbing the exhaust gas in the paint mixing operation area.

[0061] A paint pump connecting pipe sleeve 104 is installed on the side wall of the paint mixing operation area. The mobile paint mixing device paint mixing operation area is equipped with a series of safety protection measures such as the first combustible gas detection alarm device 112, the non-flammable floor 102 of the paint mixing operation area, explosion-proof lights 105, explosion vents 113, and fire dampers 121 according to the requirements of the explosion-proof area to ensure the safety of the operation area. A transparent glass window 117 is set on the side wall of the paint mixing operation area, and a fire extinguisher 116 is set in the equipment area.

[0062] The overall equipment shell is composed of a paint mixing device structural frame 101 and wall insulation cotton 103. The paint mixing operation area is equipped with an exhaust system. The industrial air conditioner 115 in the equipment area adjusts the environment of the equipment area to a specified temperature and humidity as needed, and then the air supply fan 114 transports the air in the equipment area space to the paint mixing operation area through the air supply pipeline system 106.

[0063] A fire damper 121 is provided in the air supply pipeline system 106 to prevent backfire. The paint mixing operation area uses a non-flammable floor 102 to prevent sparks caused by metal friction and collision. At the same time, the area is also provided with an explosion vent 113. When an explosion occurs in the paint mixing operation area, pressure can be released in time to prevent the expansion of accident losses. The paint mixing operation area is equipped with a combustible gas detection and alarm device. When the combustible gas concentration in the area is detected to exceed 25% of the lower explosion limit concentration, an audible and visual alarm is issued to remind the operator to take countermeasures.

[0064] Explosion-proof lamps 105 are used for regional lighting. The exhaust gas from the paint mixing operation area first passes through the pre-filter module 107 through the exhaust fan 110 to filter out the dust particles in the exhaust gas, and then enters the adsorption bed, where the VOCs in the exhaust gas are adsorbed and removed before being discharged in compliance with the emission standards. When the adsorption material of the adsorption bed is saturated, the desorption regeneration interface 109 can be connected to the desorption regeneration system for in-situ desorption and regeneration. An adsorption bed inspection door 118 is provided in the same longitude area as the desorption regeneration interface 109, and the entire equipment is automatically controlled by the device control electrical box 111 to maintain a suitable temperature and humidity in the paint mixing operation area and ensure the working conditions in the area. The device of the present invention can be hoisted and transported as a whole through the lifting lug 122.

[0065] A device control operation panel 120 is provided in the equipment area, connected to a device control electric box 111 , and the device control electric box 111 is connected to each driving device.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A movable paint mixing equipment with exhaust gas adsorption and desorption processing function, comprising a paint mixing equipment, characterized in that: The paint mixing equipment is equipped with an adsorption device for absorbing paint mixing waste gas, the air inlet and the air outlet of the adsorption device are respectively connected to a return pipe and an exhaust pipe of a desorption regeneration system, and an exhaust gas purification component is connected between the exhaust pipe and the return pipe, and the exhaust gas purification component includes a primary heat exchanger and a secondary heat exchanger connected to each other; The return pipe includes a first pipe connected to an exhaust pipe at the starting end; The first pipeline is provided with a hot air recycling valve and a first fresh air dilution valve in sequence; The terminal end of the first pipeline is connected to the fourth interface of the primary heat exchanger; The third interface of the primary heat exchanger is connected to the first interface of the secondary heat exchanger; The return pipeline includes a second pipeline whose starting end is connected to the first interface of the primary heat exchanger; The second pipeline is sequentially provided with a temperature detection controller, a first three-way valve and a desorption inlet valve; The terminal end of the second pipeline is connected to the air inlet end; The air extraction pipeline includes a third pipeline, and the starting end of the third pipeline is connected to the air outlet end; The third pipeline is provided with a desorption outlet valve, a second three-way valve, a flame arrester and a second combustible gas detection alarm device in sequence; The terminal end of the third pipeline is connected to the third interface of the secondary heat exchanger; A connecting pipe is connected between the first three-way connection and the second three-way connection, and a circulation valve is arranged on the connecting pipe; The second interface of the secondary heat exchanger is connected to the second fresh air dilution valve, the heating chamber and the catalytic oxidation chamber in sequence, and the discharge end of the catalytic oxidation chamber is connected to the second interface of the primary heat exchanger; The first interface of the secondary heat exchanger is communicated with the third interface of the primary heat exchanger, the fourth interface of the secondary heat exchanger is connected to a desorption fan, and the air outlet of the desorption fan is connected to an exhaust duct.

2. The mobile paint mixing equipment with exhaust gas adsorption and desorption processing function according to claim 1 is characterized in that: The air inlet and air outlet of the adsorption device are respectively arranged on two parallel mounting walls of the paint mixing device, and the adsorption device divides the interior of the paint mixing device into an adsorption device cavity, and a paint mixing operation cavity and an equipment cavity on the left and right sides of the adsorption device through two parallel adsorption device walls; An adsorption bed is sandwiched between the walls of the two adsorption devices.

3. The mobile paint mixing equipment with exhaust gas adsorption and desorption processing function according to claim 2 is characterized in that: An industrial air conditioner, a blower and an exhaust fan are installed in the equipment cavity; The air inlet pipe of the industrial air conditioner is arranged on the wall surface of the equipment cavity; The air inlet of the exhaust fan is arranged on the wall of the adsorption device close to the device cavity; The air outlet of the exhaust fan is arranged on the wall surface of the equipment cavity; An exhaust gas inlet is arranged on the wall surface of the adsorption equipment close to the paint mixing operation chamber, and a pre-filtering module is arranged on the exhaust gas inlet.

4. The mobile paint mixing equipment with exhaust gas adsorption and desorption processing function according to claim 3 is characterized in that: An air supply pipeline system runs through the adsorption device, the air outlet of the air supply pipeline system is arranged in the paint mixing operation chamber, and the air inlet of the air supply pipeline system is connected to the air blower.

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