WO2017080008A1

WO2017080008A1 - Paint mist capturing device with bending airflow

Info

Publication number: WO2017080008A1
Application number: PCT/CN2015/096658
Authority: WO
Inventors: 周小参
Original assignee: 周小参
Priority date: 2015-11-09
Filing date: 2015-12-08
Publication date: 2017-05-18
Also published as: CN105268584B; CN105268584A

Abstract

A paint mist capturing device with a bending airflow (100). In the device is provided a plurality of paint mist capturing units (110, 120, 130, 140, 150, 160, 170) having the same dimensions and shape and arranged to be parallel to the direction of a main airflow. The paint mist capturing units have a corrugated structure that is bent a number of times. The paint mist capturing units are arranged in parallel evenly with a gap therebetween. The material of the paint mist capturing unit is a fibrous filtering material or a hard material. A bending angle of the paint mist capturing unit gradually increases along the direction of the main airflow. The widths of bending airflow channels formed from the gaps between the paint mist capturing units gradually narrow along the direction of the main airflow. The bending airflow paint mist capturing device has a favorable paint mist separation effect and captures and accommodates a large amount of paint mist, reducing environmental pollution and energy consumption.

Description

Baffle paint mist trapping device

Technical field

The invention relates to the field of industrial painting, in particular to the field of coating paint separation and collection of coating paint, in particular to a baffled paint mist collecting device, which is widely used in the coating of automobiles, hardware, home appliances and toys.

Background technique

With the rapid development of China's economy, environmental pollution has become more and more serious. In most parts of China, human pollution of air, soil and water has far exceeded the natural capacity. In recent years, smog has become more frequent, and water pollution and soil pollution have become more and more serious. Painting is a highly polluting and energy-intensive industry. In the paint production process, a large amount of waste gas, waste liquid and solid waste are generated. In order to maintain the constant temperature and humidity conditions required for painting, it is also necessary to consume a large amount of electric energy and fossil fuel.

The traditional coating exhaust gas separation technology is mainly divided into dry type and wet type. The traditional dry paint system mainly adopts the form of paint mist filter felt. As shown in Figure 1, it is a pure single-layer filter technology, which is easy to cause partial saturation and blockage of the filter material. Limited, need to change the paint mist filter felt frequently. Frequent replacement of the filter felt requires production stoppage, which not only increases the consumption of filter materials and labor, but also occupies a large amount of production time. The production cost of the enterprise is high and the solid waste is large. Secondly, the separation effect of the paint on the paint mist is also very limited. The separated air still contains a certain amount of paint mist, which not only can not meet the quality requirements of air circulation use, but also has a large fire safety hazard. Therefore, the traditional dry technology can only be applied in small batch and intermittent spraying operations, and it is difficult to use in industrial production with large batches of continuous production. The traditional wet venturi or wet curtain cabinet technology can achieve continuous separation of paint mist, which can meet the needs of large-scale continuous operation, but this technology will generate a large amount of waste gas, waste water and waste liquid, which requires a lot of fresh consumption. Constant temperature and humidity air, high energy consumption. Although the production line of some wet water washing technology adopts the technology of circulating wind, the consumption of fresh air and the amount of exhaust gas are reduced, but the air humidity after venturi washing is very high, the temperature is low, and it needs to be dehumidified and heated to be recycled, dehumidification. The energy consumption of heating and heating is also high, and this circulating wind technology also requires a large amount of energy consumption.

In recent years, some foreign companies have also developed some new dry separation technologies, such as using lime powder to reduce the viscosity of overspray, and then relying on filtration technology to separate solids and gases. This technology requires the addition of a large amount of lime powder, which greatly increases The amount of solid waste. There are also companies that use electrostatic paint mist separation technology, but this system has problems that are easily adhered by the spray and difficult to remove. In addition, these devices are complex in structure and expensive, and are currently only used in some high-end production lines and are difficult to be widely used.

Summary of the invention

One of the objects of the present invention is to provide a baffled paint mist trapping device in order to overcome the drawbacks of the prior art described above. The paint collecting device has strong ability to capture paint mist, has good separation effect, and has large capacity. In addition, the paint trapping device is a separate unit, which is easy to replace and easy to maintain.

A second object of the present invention is to provide a dry painting system with the above-described baffled paint mist collecting device for overcoming the above-mentioned drawbacks of the prior art. The painting system has a simple structure, reliable performance, energy saving and environmental protection.

One of the objects of the present invention can be achieved by the following technical solutions:

The utility model relates to a baffled paint mist collecting device, which comprises a device shell, a device inlet, a device outlet, a paint mist collecting unit and a sheet filter layer, characterized in that: a plurality of paint mists are arranged in the casing of the device parallel to the main flow direction of the air. The trap unit, the paint mist trap unit is a corrugated plate structure having several bends.

Further, the present invention provides a baffled paint mist trapping device, which may also have the feature that the plurality of paint mist trapping units are the same size and shape.

Further, the present invention provides a baffled paint mist trapping device, which may further have the feature that the plurality of paint mist trapping units are arranged in parallel with a gap therebetween.

Further, the present invention provides a baffled paint mist collecting device, which may further have the feature that the paint mist collecting units are uniformly distributed and the gap therebetween is equal.

Further, the present invention provides a baffled paint mist trapping device, which may further have the feature that the angle of bending of the corrugated plate-like paint mist collecting unit having several bends gradually increases along the air main flow direction .

Further, the present invention provides a baffled paint mist trapping device, which may further have a feature that a width of a curved air flow passage formed by a gap between the paint mist collecting units is gradually narrowed in the air main flow direction .

Further, the present invention provides a baffled paint mist collecting device, which may further have a feature that the paint mist collecting unit and the curved passage formed by the gap therebetween serve as a paint mist separation and trapping mechanism.

Further, the present invention provides a baffled paint mist trapping device, which may also have the feature that the material of the paint mist trapping unit is a fiber filter material.

Further, the present invention provides a baffled paint mist trapping device, which may also have the feature that the material of the paint mist trapping unit is a smooth hard material.

The second object of the present invention can be achieved by the following technical solutions:

The invention provides a dry painting system, characterized in that the baffled paint mist collecting device is arranged at an air outlet of a painting system to capture paint mist in the discharged air.

Compared with the prior art, the present invention has the following beneficial effects:

According to the baffled paint mist collecting device provided by the present invention, a plurality of paint mist collecting units having the same size and shape are arranged in parallel with the air main flow direction, and the paint mist collecting unit is a corrugated board having several bends. The structure of the paint mist collecting unit is arranged in parallel and has a gap therebetween, and the material of the paint mist collecting unit is a fiber filter material. In the early stage of the use of the paint mist collecting unit, the paint mist collecting unit has good gas permeability, and the entire paint mist collecting device operates in a filtered mode. As the use time increases, some or all of the paint mist trapping unit will be blocked due to saturation of the adsorbed paint. At this time, the air carrying the paint mist can only advance through the curved flow passage between the paint mist trapping units. . During the flow of the air carrying the paint mist through the curved flow channel, the direction of flow of the air has undergone several large angle transitions. In the process of large-angle transition in the direction of air flow, the air and the paint mist carried by it will move in the original direction under the action of inertial force and collide with the blocked paint mist trapping unit. During the impact, the air is bounced and the paint mist in the air collides and adheres to the paint mist capture unit. When the paint accumulated on the paint mist collecting unit reaches a certain thickness, it will collect under the action of gravity to the bottom of the box, and the air flow passage is prevented from being blocked by the excessive accumulation of paint. In the process of working in the filtration mode of the paint mist collecting device, the paint mist collecting unit can capture a large amount of paint, and the paint mist collecting device can pass after the paint mist collecting unit is saturated by adsorbing a large amount of paint. The inertial force separates and captures a large amount of paint. The structural form of the invention not only fully exerts the filtering potential of the paint mist collecting unit, but also changes the layout form of the filtering material, and utilizes the principle of inertial force to separate and capture the paint mist, thereby greatly improving the paint mist of the paint mist collecting device. Separation effect and capacity.

According to the baffled paint mist collecting device provided by the present invention, a plurality of paint mist collecting units are arranged in parallel, and the bending angle of the bending surface of the paint mist collecting unit is gradually increased in the direction along the main flow of the air, and the paint mist is gradually increased. The width of the curved air flow passage formed by the gap between the trap units is gradually narrowed in the main flow direction of the air. In the paint mist The large paint lacquer drops have a large inertia force. Even if the direction of the air flow channel changes little, the paint granules with a slightly larger particle size can collide with the bending surface of the paint mist collecting unit and be adhered to the trap. . The gradually increasing bending angle can change the direction of the air flow path more greatly, causing the smaller particle paint lacquer to collide and adhere to the bending surface of the paint mist collecting unit. The layout of the bending surface with different bending angles in the paint mist collecting unit enables different sizes of paint particles to be captured in various parts of the paint mist collecting device, so that the entire paint mist collecting device forms a three-dimensional paint mist capturing device. The space greatly improves the separation effect of the entire paint mist collecting device and the ability to capture and accommodate the paint mist.

The baffled paint mist collecting device provided according to the present invention is made of recycled low-value materials and is a one-time use product, each device is made in the form of a separate unit, and each individual can be replaced as needed. The cabinet is compact, easy to replace, and low in use and maintenance.

The dry painting system including the baffled paint mist collecting device provided by the present invention perfectly solves the problem of the absorption capacity of the conventional dry paint mist separation technology. Compared with the conventional wet venturi or water curtain cabinet, the invention greatly reduces the amount of exhaust gas and waste liquid, and does not use water at all. After the air passes through the baffled paint mist collecting device of the invention, the temperature and humidity of the air are substantially unchanged, and the recycling of the air can be easily realized. After the air is washed by the traditional wet water, the temperature is greatly reduced and the humidity is greatly increased. If this air is recirculated, dehumidification and heating are required, and a large amount of cooling energy and heating energy are consumed. If it is not recycled, not only a large amount of exhaust gas needs to be discharged, but also a large amount of constant temperature and humidity air used in the spray booth consumes a large amount of energy. Therefore, compared with the conventional painting technique, the dry painting system using the baffled paint mist collecting device of the present invention can greatly reduce environmental pollution and energy consumption.

In addition, the baffled paint mist collecting device provided by the present invention has a large absorption capacity for paint mist, so that the amount of solid waste can be greatly reduced. The paint mist collecting device is completely separated by paint, and the paint is evenly distributed throughout the paint mist collecting device, and the air permeability is good. The main components of the paint mist are resins and solvents. The combustion value is high, and most of the materials in the device itself are also combustible materials. Therefore, the replaced paint mist trapping device with good ventilation and high combustion value can be used as fuel and turned into waste. The traditional wet technology, in the process of paint mist capture, adds a large amount of other non-combustible substances, and is mixed with water that is difficult to remove. It is difficult to treat these wastes by incineration, and is often used for landfill disposal. Contaminated soil and groundwater. Therefore, this invention has great significance for energy conservation and environmental protection.

DRAWINGS

Figure 1 is a schematic view showing a partial saturation of a conventional paint mist filter felt;

2 is a schematic view showing the outer structure of a baffled paint mist collecting device of the first embodiment;

Figure 3 is a perspective view showing the three-dimensional structure of the baffled paint mist collecting device of the first embodiment;

4 is a schematic cross-sectional structural view of a baffled paint mist trapping device of Embodiment 1;

Figure 5 is a perspective view showing the three-dimensional structure of the baffled paint mist collecting unit of the first embodiment;

6 is a schematic view showing ventilation and filtration in an initial state of a baffled paint mist collecting device of Embodiment 1;

Figure 7 is a schematic view showing the ventilation of the paint mist collecting device in the clogging state of the paint mist collecting unit of the first embodiment;

Figure 8 is a perspective view showing the three-dimensional structure of the baffled paint mist collecting device of the second embodiment;

Figure 9 is a schematic cross-sectional structural view of a dry painting system;

Figure 10 is a process flow diagram of a typical dry painting system.

detailed description

The invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following embodiments.

Example 1

As shown in FIG. 2, FIG. 3, FIG. 4 and FIG. 5, the present embodiment provides a casing of a baffled paint mist collecting device 100, such as a box structure, each of which is a single unit and is rigid. Made of material, cardboard material can be used. Including: device inlet, paint mist capture chamber, sheet filter layer, device outlet.

The device inlet 70 is disposed at an upper portion of the device side, and the device outlet 80 is disposed at an upper portion of the other side of the device. The paint mist collecting chamber 101 side is connected to the device inlet 70, the other side is connected to the sheet-like filter layer 180 and the outlet 80, and the paint mist collecting chamber is provided with seven paint

mist collecting units

110 and 120 having the same size and shape. 130, 140, 150, 160, 170.

The paint

mist collecting unit

110, 120, 130, 140, 150, 160, 170 of the present embodiment is a corrugated plate structure having 13 bends, and each of the paint mist collecting units has an

air draining surface

201 and 13 bending faces 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, the bending angle of the bending surface is gradually increased from the bending surface 202 to the bending surface 214 Large, the paint mist capture unit is the same size and shape, as shown in Figure 5. The seven paint mist trapping units are arranged parallel to the main flow direction of the air, parallel and evenly distributed with each other, leaving equal gaps therebetween. The gap between two adjacent paint mist trapping units forms one bend with 13 bends The air flow passage, since the angle at which the paint mist trapping unit is bent in the main direction of the air is gradually increased, the width of the bent air flow passage formed by the gap between the two paint mist trapping units is also along the air main flow direction. Gradually narrowed. The paint mist collecting unit is a fiber filter material, and a glass fiber filter material can be used.

A sheet-like filter layer 180 is disposed between the paint mist collection chamber 101 and the outlet 80. The sheet-like filter layer 180 is a fiber filter material, and a glass fiber material or a nonwoven fabric material may be used, and the front and rear sides thereof are fixed by a plastic grid.

The air carrying the paint mist enters the paint mist trap device horizontally from the device inlet 70, and first enters the paint mist trap chamber 101. In the early stage of the use of the paint mist collecting device, the paint mist collecting unit has good gas permeability. The air entering the paint mist collecting chamber 101 and the paint mist portion carried therein flow into the drainage surface 201 of the paint mist collecting unit, partially enter the gap between the drainage surface of the paint mist collecting unit 201 and flow forward. During the process of the air carrying the paint mist flowing through the drainage surface 201 of the paint mist collecting unit, the paint lacquer droplets constituting the paint mist are intercepted and captured, the air passes through the paint mist collecting unit, and the paint mist is applied under the pressure difference. The outlet of the trap flows in the direction of the outlet. The portion of the air that carries the paint mist entering the gap between the drainage surface of the paint mist capture unit first encounters the curved surface 202 during the advancement process. At the bend, part of the air carrying the paint mist is in the inertial force. Under the action of the movement, the moving direction of the movement is maintained, and the bending surface 202 is entered for filtering. Since the air resistance of the bending surface 202 of the paint mist collecting unit is greater than the air resistance of the air passage therebetween, part of the air carrying the paint mist changes the flow direction, and the air flow passage between the bending surfaces 202 under the pressure difference go ahead. The portion of the air that travels along the air flow path between the curved faces 202 and the paint mist carried there will encounter the curved face 203 directly in front of the passage during the advancement, and the air and the paint mist carried by it encounter The process of bending the surface 202 is the same, part of the air and the paint mist carried by it will enter the bending surface 203 under the action of inertial force, and part of the air and the paint mist carried by it will flow into the bending surface 203 with less air resistance. Air flow path between. The process and principle of air flow through the subsequent bend faces are similar to those of the bend faces 202 and 203 and will not be described in detail herein. Figure 6 illustrates the air flow path and the filtration and trapping process of air flowing through the drainage surface 201, the

curved surfaces

202, 203, 204, the air flow path of the subsequent bending surfaces, and the filtration and capture process and the above various bending surfaces. Similar, they are not marked here one by one. The arrows in the figure represent the direction of flow of the air, and the small black dots in the arrows represent the paint fog. It can be seen from the schematic diagram that the layout of the air flow passages bent between the paint mist collecting units can drain and disperse the air carrying the paint mist to various parts of the paint mist collecting device for filtering and collecting, greatly improving The use efficiency of the paint mist trapping unit in the paint mist trapping device and the ability of the trapping unit to absorb the paint mist during the filtering phase.

As the use time prolongs, some or all of the paint mist capture unit captures a large amount of paint, and the breathability of the paint mist trap unit deteriorates until it is clogged. In this process, the paint mist capture method of the paint mist trap is also Gradually change, the filtered paint mist is gradually converted to capture the paint mist by means of inertial force.

When the paint mist trapping unit is clogged, the air carrying the paint mist cannot pass through the paint mist trapping unit, and can only move forward along the air flow passage that is bent several times between the trapping units. The air carries the paint mist first into the drainage channel between the drainage faces 201 of the paint mist capture unit, through which the drainage of the channels enters the air flow channel vertically. The air and the paint mist carried by it in the process of advancement first encounter the blocking of the bending surface 202 of the paint mist collecting unit, and the air and the paint mist carried by it will hit the forward direction of the forward direction under the action of inertial force. In the bending surface 202, during the impact, the air is rebounded, the direction is changed under the pressure difference, and the air circulation passage is advanced along the bending surface 202, and the paint mist is hit by the inertial force. And adhered to the curved surface 202 of the paint mist collecting unit. The air advancing along the air circulation passage between the curved surfaces 202 will encounter the blocking surface 203 during the advancement process, and the air and the paint mist carried by it will hit the forward direction under the action of the inertial force. In the front curved surface 203, during the impact, the air is rebounded, and the paint mist in the air collides with the inertial force and adheres to the curved surface 203. The process of separating and trapping the air through the subsequent bending surfaces is similar to the process of separating and trapping the paint mist of each of the above-mentioned bent surfaces, and will not be described in detail herein. Figure 7 illustrates this process. Six air flow passages are formed between the seven paint

mist trapping units

110, 120, 130, 140, 150, 160, 170 disposed in the baffled paint mist trap, several times. The bent paint mist trapping unit also forms an air flow passage having several bends. The arrow in the air flow passage area represents the flow direction of the air, and the black small dots in the arrow represent the paint mist carried in the air.

The baffled paint mist collecting device provided by the present invention firstly collects the paint mist in the air in the form of filtering until the partial or all of the paint mist collecting unit is saturated and blocked. In the process, the paint mist capture unit can capture a large amount of paint mist. When the paint partially trapped by the paint mist collecting unit is saturated and blocked, the baffled paint mist collecting device starts to collect the paint mist by means of filter trapping and inertial force trapping, and the paint mist trapping unit is blocked. The part absorbs the paint mist by inertial force, and the non-blocking part captures the paint mist in the form of filtering and inertial force, until all the paint mist collecting units are blocked, and the process can make the paint mist collecting unit All parts of the collection are covered with paint. When the paint mist trapping unit is completely blocked, the paint mist trapping device completely captures the paint mist in the inertial force mode. During this process, the paint mist impacts and adheres to the bending surface of the paint mist collecting unit. After the paint on the surface of the paint mist collecting unit accumulates to a certain thickness, it will also collect under the action of gravity to the bottom of the paint mist collecting device, avoiding the excessive blockage of the paint mist collecting device, and of course there will be a part of the paint. It will solidify on the paint mist trapping unit until the entire baffled paint mist trapping device is completely blocked, and the paint mist trapping device also captures a large amount of paint. In practice, the trapping capacity of the paint mist of this structure is also confirmed. The ability is great.

A plurality of paint mist collecting units are arranged in parallel in the paint mist collecting device, each of the paint mist collecting units has 13 bending surfaces, and the bending surface of the paint mist collecting unit is bent in the direction of the air main flow. The angle of the air is gradually increased, and the width of the curved air flow passage formed by the gap between the paint mist collecting units is gradually narrowed in the main flow direction of the air. The large paint lacquer drop in the paint mist has a large inertia force. Even if the direction of the air flow passage changes by a small angle, the larger paint lacquer drop can hit the front of the forward direction under the action of a large inertial force. The segment paint mist capture unit is adhered and trapped, and the larger particle size paint paint droplets are first captured in the front section of the baffled paint mist trap. The gradually increasing bending angle can gradually increase the amplitude of the air flow path change, and also gradually narrow the width of the air flow channel, so that the air and air paint lacquer drops have higher speed and inertia force, making the smaller Light paint lacquer drops can also collide and adhere to the paint mist capture unit. The small and light paint lacquer drops in the paint mist are mainly intercepted and captured in the rear section of the paint mist trap. The different bending angle layout of the baffled paint mist trapping unit enables different sizes of paint lacquer to be intercepted and captured in various parts of the paint mist collecting device, so that the entire paint mist collecting device forms a three-dimensional paint mist capture. The space is provided, which greatly improves the separation effect of the paint mist collecting device and the ability to capture and accommodate the paint mist.

After the air is trapped by the paint mist trapping unit in the paint mist trap, it enters the flake filter layer 180. The filter layer uses a whole piece of filter material to function as a comprehensive filter, and the above layers are not captured. A small amount of paint mist is further intercepted and captured. The sheet-like filter material may be a glass fiber filter material or a nonwoven fabric material.

Example 2

As shown in FIG. 8, the structural form and layout form of the paint mist collecting unit disposed in the baffled paint mist collecting device are similar to those in Embodiment 1, and will not be described in detail herein. The paint mist collecting unit of this embodiment is a smooth hard material, and the smooth hard material can use a cardboard material. The principle of the separation and capture of the paint mist is the same as the principle of the inertial force capture and separation of the embodiment 1, and is an air flow passage through which the air carrying the paint mist passes through the paint mist collecting unit several times, in the air and When the carried paint mist passes through the bend of the passage, the direction of the air circulation path changes at a large angle, and the air and the paint mist carried by it will hit the paint mist trap directly in front of the air forward direction under the action of inertial force. A bent surface of the unit, during the impact, the air is bounced, and the paint mist in the air will collide with the inertia force and adhere to the paint mist collecting unit. The paint adhered to the trap unit accumulates to a certain thickness and is collected by gravity to the bottom of the trap. Since the thickness of the paint mist collecting unit of the embodiment is much smaller than the thickness of the filter material of the embodiment 1, the baffle trapping device of the embodiment has more paint mist trapping units arranged to capture more Paint fog.

The number of paint mist trapping units arranged in the first embodiment and the second embodiment is arranged according to common paint types and common spray atomization conditions and according to practical experience. For some special paint types and spray atomization methods, the number, spacing and bending angle of the paint mist trapping unit arranged in the paint mist trap can be adjusted accordingly to make the entire baffled paint mist capture. The paint trapped in the device is evenly distributed so that the trap has a good separation effect and a trapping capacity.

As shown in FIG. 9, the dry painting system provided by the embodiment mainly comprises the following parts: the air inlet pipe 10, the dynamic pressure chamber 11, the static pressure chamber 12, the spray booth 20, the painting robot 24, the conveying system 22, and the spray booth paint. The mist collecting chamber 30, the baffled paint mist collecting device 100, and the exhaust fan 50 are provided with the baffled paint mist collecting device 100 disposed in the spray booth paint mist collecting chamber 30.

The working process of the dry painting system is as follows:

The product to be sprayed is transported from the upstream of the painting system to the painting system by the conveying system, and the object 21 to be sprayed is painted in the painting system.

The constant temperature and humidity air from the air conditioner enters from the air inlet 10 of the painting system, and then flows through the dynamic pressure chamber 11; the air that flows through the dynamic pressure chamber is filtered by the bag filter 13 and enters the static pressure chamber 12; The air of uniform flow velocity from the static pressure chamber is filtered by the top cotton of the spray booth and then enters the spray booth 20.

A lower portion of the spray booth is provided with a steel structure that supports the transport system 22, the painting robot 24, and the bottom grill 23. The delivery system 22 is capable of transporting the object 21 from the entrance of the spray booth to a desired location; the spray robot 24 is capable of spraying the object 21 to be sprayed; the grill 23 provides access to both the personnel and the spray booth and the lower portion. The spray booth paint mist collection room is connected.

The air coming from the static pressure chamber will carry the paint lacquer that is not attached to the surface of the object during the painting process, and this part of the paint lacquer is defined as overspray. These tiny paint lacquer drops are suspended in the air to form a mist. The combination of these small paint lacquer droplets suspended in the air to form a mist is called a paint mist.

An air guiding space 31 is disposed in the spray booth paint mist collecting chamber 30, and the air carrying the overspray enters the area downward through the hole of the grid plate. The air guiding area is open upwards, the sides are defined by side panels 38, the bottom surfaces of the sides are defined by the top of the lacquer trap 100 and the cavity 41, and the bottom surface is defined by the bottom plate 39. The cross-sectional shape of the entire air guiding space 31 is a T-shape.

The air coming from the static pressure chamber carries the overspray generated during the spraying process while passing through the spray booth 20. The air carrying the overspray flows through the grid plate 23 to the spray booth paint mist collecting chamber 30 under the action of the pressure difference. In the spray booth of the spray booth, the air carrying the overspray is guided to the middle of the two rows of paint mist collecting devices through the flow guiding space 31, and then the air changes the flow direction under the pressure difference and enters the horizontal state. The two parts flow into two sides, and then enter the paint mist collecting device 100 on both sides.

In this embodiment, the paint mist trapping device in the spray booth of the spray booth is composed of two rows of baffled paint mist trapping devices, and the number of the paint mist trapping devices depends on the length of the spray booth.

The air carrying the overspray enters from the inlet 70 of the paint mist collecting device 100 and is discharged from the outlet 80.

The air carrying the overspray enters the baffled paint mist collecting device 100 from the inlet 70, and is separated and captured by the paint

mist collecting units

110, 120, 130, 140, 150, 160, 170, and the paint mist is painted. The trapping unit is separately captured and collected in a baffled paint mist trap, the air is thoroughly purified, and finally the air is filtered through the sheet filter layer 180 and discharged through the outlet 80.

The air passes through the baffled paint mist collecting device 100, and enters a cavity 41 in which a bag filter or activated carbon can be disposed. The cavity 41 is open at one end, and the size of the opening and the size of the outlet of the baffled paint mist collecting device are The same, and the baffled paint mist trapping device and the cavity are connected through a sealing joint. The other end of the cavity is connected to the damper 42 via a flange, the other end of the damper is connected to the duct 43, and the other end of the duct 43 is connected to the blower 50. The role of the fan is to power the flow of the wind, providing a pressure differential to the air in order to allow the air to flow. After the air is pressurized by the fan 50, it is sent to the circulating air conditioner by the air duct 60 and a subsequent duct not shown. In the circulating air conditioner, the temperature and humidity of the air are finely adjusted to the construction window required by the spraying environment, and then returned to the painting system for recycling.

In the process of flowing through the baffled paint mist collecting device, the air carrying the overspray only captures the paint mist without changing the temperature and humidity of the air. After the air is pressurized by the fan, it can be sent back to the painting system. Re-use, does not need to consume a lot of fresh air, does not need to discharge a large amount of exhaust gas, does not need to consume a lot of energy consumption, energy saving and environmental protection.

In order to facilitate the replacement of the baffled paint mist capture device 100, a conveyor track 32 is mounted at the bottom of the paint system for removal of the capture device that needs to be replaced and for moving into a new capture device. The paint mist trapping device is placed on a tray 37 having rollers, and the rollers mounted under the tray roll on the conveying rail 32, so that the paint mist collecting device to be replaced can be easily moved in or out. After the replacement, it is necessary to lay a cover 36 on the conveying track, which can protect the conveying track from the paint mist on the one hand, and collect a part of the paint on the other hand. This cover can be a cardboard or plastic film.

During the spraying process, most of the solvent in the paint will volatilize into the air flowing through the painting system. If the air is circulated all the time, the concentration in the air will gradually increase. In order to avoid the concentration of solvent in the air reaching the explosion limit, we generally use a part of fresh air or low solvent concentration air to discharge a part of high solvent concentration air for incineration. Low solvent concentration air can be used to manually spray the vented air from the area. A typical process flow diagram is shown in Figure 10.

The above embodiments are merely illustrative of the principles and functions of the patent, and are not intended to limit the patent. Modifications or variations of the above-described embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and scope of the invention are still covered by the appended claims.

Claims

The utility model relates to a baffled paint mist collecting device, which comprises a device shell, a device inlet, a device outlet, a paint mist collecting unit and a sheet filter layer, characterized in that: a plurality of paint mists are arranged in the casing of the device parallel to the main flow direction of the air. The trap unit, the paint mist trap unit is a corrugated plate structure having several bends.
The baffled paint mist collecting device according to claim 1, wherein said plurality of paint mist collecting units have the same size and shape.
A baffled paint mist trapping apparatus according to claim 1, wherein said plurality of paint mist collecting units are arranged in parallel with a gap therebetween.
The baffled paint mist collecting device according to claim 1, wherein said plurality of paint mist collecting units are uniformly distributed and the gap therebetween is equal.
The baffled paint mist collecting device according to claim 1, wherein the angle of bending of the corrugated plate-like paint mist collecting unit having a plurality of bends gradually increases in the air main flow direction.
The baffled paint mist collecting device according to claim 1, wherein a width of the curved air flow passage formed by the gap between the paint mist collecting units is gradually narrowed in the air main flow direction.
The baffled paint mist collecting device according to claim 1, wherein the paint mist collecting unit and the curved passage formed by the gap therebetween serve as a paint mist separation and trapping mechanism.
The baffled paint mist collecting device according to any one of claims 1 to 7, wherein the material of the paint mist collecting unit is a fiber filter material.
The baffled paint mist collecting device according to any one of claims 1 to 7, wherein the material of the paint mist collecting unit is a smooth hard material.
A dry painting system characterized by comprising a baffled paint mist collecting device according to claims 1-9, disposed at an air outlet of the painting system for trapping paint mist in the discharged air.