A box-type DF paint mist collector

Abstract

The present invention is applicable to the technical field of paint mist treatment process, and provides a box-type DF paint mist collector, including a honeycomb paper paint mist filter paper box, and the paper box is a box body with ventilation passing through the opposite surfaces, and two groups of front and rear honeycomb papers with different opening sizes are used inside the paper box through staggered stacking as the first barrier layer and the second barrier layer, and a third barrier layer including non-woven fabric is arranged at the end of the paper box to control the filtration accuracy; the advantages of the DF paint mist collector: the paint mist collector adopts flame-retardant professional paint mist cotton, which can be incinerated; the paint mist collector has a stable structure, can maintain low wind resistance operation for a long time, and optimizes airflow; a single paint mist collector can capture 30kg of overspray paint, and the filter paper has a longer service life; the honeycomb paper paint mist filter paper box has been widely used, and can basically meet the requirements of large-scale continuous production, and the first barrier layer, the second barrier layer and each frame in the third barrier layer are also made of honeycomb paper.

Description

Technical Field

[0001] The invention belongs to the technical field of paint mist treatment technology, and in particular relates to a box-type DF paint mist collector. Background Art

[0002] With the upgrading and improvement of national environmental protection laws and regulations, the requirements for the treatment of volatile organic compounds (VOCs) are clear, and the real-time monitoring of environmental protection departments has moved from theory to reality. The original extensive paint mist treatment methods of some painting workshops cannot meet the requirements of regulations. The application of various VOCs waste gas treatment equipment in the coating industry has encountered the problem of paint mist adhesion pollution. In recent years, some areas in China have also begun to limit the use of water-washed paint mist capture devices and began to switch to dry spray booths that do not produce paint residues. In view of the difficulties encountered in the two dry and wet coating paint mist treatment processes, the paint mist collector’s application effect in the paint mist capture of the coating industry is worthy of recognition. In the coating production line of the vehicle industry, the traditional wet spray booth has high processing costs, requires a large amount of water and chemicals, has low resource utilization, and poor energy-saving effects, making the painting workshop a major energy consumer in the four major automotive processes, accounting for more than 70% of energy consumption. The dry spray booth removes paint mist from the air through limestone, paint mist collectors, etc., does not rely on any chemical agents, significantly reduces processing costs, and is green and environmentally friendly without secondary pollution.

[0003] With my country's emphasis on environmental pollution control and the requirements for green production and sustainable industrial development, traditional wet spray booths can no longer meet the energy-saving and environmental protection needs of automobile production. The paint mist collectors used in dry spray booths are made of renewable raw materials, corrugated paper, and have the advantages of flexibility and easy replacement. They also have strong adsorption capacity. In most cases, the paint mist collectors that have been saturated with adsorption can be incinerated in incinerators with low maintenance costs. In production, paint mist collectors can generally be quickly replaced without stopping production through pre-assembled filter units, and no special skills are required for operators.

[0004] However, facing the uneven and diverse paint mist filter paper boxes on the market, how can we choose a suitable paint mist collector? It is recommended that in addition to paying attention to the weight of the captured paint, you should also pay attention to its filtering accuracy, initial wind resistance, etc. A paint mist collector that can truly achieve excellent precision control and paint capacity is rare. Summary of the invention

[0005] The present invention provides a box-type DF paint mist collector, which aims to solve the problem that in the existing paint mist filtering, either multiple layers of different filter layers are used to filter the paint mist, but this often leads to slow air flow and requires frequent replacement, or only a few simple layers are used to filter the paint mist, resulting in poor filtering effect of the paint mist.

[0006] The present invention is implemented as follows: a box-type DF paint mist collector includes a honeycomb paper paint mist filter paper box, and the paper box is a box body with ventilation passing through opposite surfaces. Inside the paper box, two groups of front and rear honeycomb papers with different opening sizes are stacked in staggered layers as the first barrier layer and the second barrier layer, and a third barrier layer including non-woven fabric is arranged at the end of the paper box to control the filtration accuracy.

[0007] Preferably, the first barrier layer, the second barrier layer and the third barrier layer are sequentially arranged inside the paper box according to the direction of air flow, wherein the first barrier layer includes a plurality of loading layers connected in parallel, the second barrier layer is composed of a plurality of primary filtration layers connected in parallel, and the third barrier layer includes a fine filtration layer.

[0008] Preferably, the loading layer is composed of a V-shaped plate and two guide plates, and the two guide plates are respectively arranged on the outer sides of the V-shaped plate and bent inwards for guiding air to the tip of the V-shaped plate.

[0009] Preferably, a first through hole is provided on the V-shaped plate on the back side of the guide plate.

[0010] Preferably, the primary filter layer is configured to be V-shaped, and a plurality of second through holes are opened on the surface, and a second filter is arranged inside each of the second through holes.

[0011] Preferably, the fine filtration layer is configured to be in a flat plate shape, and a plurality of third through holes are opened on the surface, and a third filter is disposed inside each of the third through holes.

[0012] Preferably, two opposite side surfaces of the paper box are both configured to be through-through and serve as an air inlet and an air outlet respectively, and an upper surface of the paper box is provided with a cover plate that can be lifted upwards.

[0013] Preferably, flame-retardant professional paint mist cotton is filled between the first barrier layer and the second barrier layer.

[0014] Preferably, the filtering effects of the second filter and the third filter on paint particles in paint mist gradually increase, and the second filter is a polyester filter.

[0015] Compared with the prior art, the beneficial effects of the present invention are: a box-type DF paint mist collector of the present invention has the following advantages:

[0016] 1. Reduce solid waste generation: The paint mist collector uses flame-retardant professional paint mist cotton, which can be incinerated.

[0017] 2. Stable wind balance: The paint mist collector has a stable structure and can maintain low wind resistance operation for a long time, optimizing airflow.

[0018] 3. Improve filtration efficiency: Professional design, the filtration efficiency of 10 micron paint mist reaches 99.8%.

[0019] 4. Extended service life: A single paint mist collector can capture 30kg of overspray paint, and the filter paper has a longer service life.

[0020] 5. Simple production: Honeycomb paper paint mist filter paper box has been widely used, which can basically meet the requirements of large-scale continuous production. The first barrier layer, the second barrier layer and the frames in the third barrier layer are also made of honeycomb paper. The overall material acquisition is convenient and the production is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the flow direction of air paint mist purification of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the first barrier layer and the second barrier layer in the present invention;

[0024] Figure 4 Schematic diagram of the structure of the third barrier layer in the present invention;

[0025] In the figure:

[0026] 1. Paper box; 11. Air inlet; 12. Air outlet;

[0027] 2. first barrier layer; 21. loading layer; 211. V-shaped plate; 212. guide plate; 213. first through hole;

[0028] 3. Second barrier layer; 31. Primary filter layer; 32. Second through hole; 33. Second filter;

[0029] 4. third barrier layer; 41. fine filter layer; 42. third through hole; 43. third filter;

[0030] 5. Flame retardant professional paint mist cotton. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] See also Figure 1-4 , the present invention provides a technical solution:

[0033] A box-type DF paint mist collector comprises a honeycomb paper paint mist filter paper box 1, and the paper box 1 is a box body with ventilation passing through opposite surfaces. Two groups of front and rear honeycomb papers with different opening sizes are stacked in staggered layers inside the paper box 1 as a first barrier layer 2 and a second barrier layer 3, and a third barrier layer 4 including non-woven fabric is arranged at the end of the paper box 1 to control the filtering accuracy.

[0034] DF paint mist collector is made of a synthetic flame retardant material. The windward side of the collector adopts the loading layer 213D backflow laminar structure design in accordance with the deep filtration principle. It can not only capture more paint mist, but also capture 99.8% of small paint mist above 10 microns. The characteristic of DF paint mist collector is that the material has self-supporting ability. Even after absorbing a large amount of paint mist per square meter, the honeycomb structure of the filter material is still clearly visible, thus ensuring the dust holding capacity of the material. Standard DF material is suitable for two-component solvent-based paint and water-based paint. The removal rate of paint particles above 20um is 100%, the removal efficiency of paint particles above 10um is 99.8%, and the removal efficiency of paint particles above 5um is 84.5%. It can achieve a paint mist capture capacity of 30kg / m2. DF paint mist collector itself does not contain synthetic fiber materials, has excellent waterproof ability, and is safe in the manufacturing and use processes. After use, 100% of solid waste can be incinerated.

[0035] Advantages of DF paint mist collector: Reduce solid waste generation: The paint mist collector uses flame-retardant professional paint mist cotton, which can be incinerated; Stable wind balance: The paint mist collector has a stable structure and can maintain low wind resistance operation for a long time, optimizing airflow; Improve filtration efficiency: Professional design, the filtration efficiency of 10 micron paint mist reaches 99.8%; Extend service life: A single paint mist collector can capture 30kg of overspray paint, and the filter paper has a longer service life; Simple production: Honeycomb paper paint mist filter paper boxes have been widely used, which can basically meet the requirements of large-scale continuous production, and the first barrier layer, the second barrier layer and the various frames in the third barrier layer are also made of honeycomb paper, the overall material acquisition is convenient, and the production is simple.

[0036] A first barrier layer 2, a second barrier layer 3 and a third barrier layer 4 are arranged in sequence inside the paper box 1 according to the direction of air flow, wherein the first barrier layer 2 includes a plurality of loading layers 21 connected in parallel, the second barrier layer 3 is composed of a plurality of primary filter layers 31 connected in parallel, and the third barrier layer 4 includes a fine filter layer 41.

[0037] The multiple loading layers 21 in the first barrier layer 2 are used to block larger particles in the paint mist, and at the same time, 74% of the paint is filtered. After that, the flame-retardant professional paint mist cotton 5 between the second barrier layer 3 and the first barrier layer 2 cooperates with the primary filter layer 31 of the second barrier layer 3 to further pre-process the larger particles in the paint mist, and at the same time, 24% of the paint is filtered. Finally, the third barrier layer 4 cooperates with the non-woven fabric to process the last paint particles in the paint mist, completing the filtration of the entire air to obtain pure air with a purity of 99.8%.

[0038] The loading layer 21 is composed of a V-shaped plate 211 and two guide plates 212. The two guide plates 212 are respectively arranged on the outer sides of the V-shaped plate 211 and are bent inward to guide the air to the tip of the V-shaped plate 211. A first through hole 213 is opened on the V-shaped plate 211 on the back of the guide plate 212.

[0039] The V-shaped plate 211 on the loading layer 21 is used to intercept and accumulate paint particles with larger particle sizes blowing in from the wind at the cone tip, and does not affect the first through hole 213 on the back of the guide plate 212, thereby ensuring the normal flow of air. The guide plate 212 is used to guide all the air and the paint particles in the air to the cone tip of the V-shaped plate 211, and also protects the first through hole 213 to avoid directly flowing into the second barrier layer 3 from the first through hole 213, thereby ensuring the processing of paint particles with larger particle sizes in the air and the normal flow of air.

[0040] The primary filter layer 31 is configured to be V-shaped, and a plurality of second through holes 32 are formed on the surface thereof. A second filter 33 is disposed inside each of the second through holes 32 .

[0041] The V-shaped frame of the primary filter layer 31 is made of honeycomb panels. The V-shape allows larger paint particles in the air to directly hit the tip of the V and be intercepted there. A plurality of second through holes 32 are provided on the left and right side surfaces thereof, and a second filter 33 is installed on the second through holes 32 to further filter the paint particles in the air.

[0042] The fine filter layer 41 is configured to be in a flat plate shape, and a plurality of third through holes 42 are formed on the surface thereof. A third filter 43 is disposed inside each of the third through holes 42 .

[0043] The flat plate frame of the fine filter layer 41 is made of a honeycomb board, and a plurality of rectangular third through holes 42 are provided on its surface for ventilation. The third filter 43 in the third through holes 42 comprises a non-woven fabric for intercepting and filtering the last paint particles in the air.

[0044] Two opposite side surfaces of the paper box 1 are arranged to be through and serve as an air inlet 11 and an air outlet 12 respectively, and the upper surface of the paper box 1 is provided with a cover plate that can be lifted upwards.

[0045] The opposite surfaces of the paper box 1 are provided with an air inlet 11 and an air outlet 12, ensuring that the air inlet 11 and the air outlet 12 are in the same straight line, so that the wind passes through a shorter distance, thereby increasing the air filtering speed and ensuring rapid filtering of the air.

[0046] The upper surface of the paper box 1 is arranged as a liftable cover, so that the first barrier layer 2, the second barrier layer 3 and the loading layer 21, the primary filter layer 31 and the fine filter layer 41 in the third barrier layer 4 inside the paper box 1 can be processed directly from the upper surface of the paper box 1, thereby increasing the convenience of installation and adjustment inside the paper box 1.

[0047] Flame-retardant professional paint mist cotton 5 is filled between the first barrier layer 2 and the second barrier layer 3 .

[0048] The flame-retardant professional paint mist cotton 5 is used to filter and block the paint particles in the air between the first barrier layer 2 and the second barrier layer 3, further filter the paint particles in the air filtered by the first barrier layer 2, and further filter the filtered air by the second barrier layer 3.

[0049] The filtering effects of the second filter 33 and the third filter 43 on the paint particles in the paint mist gradually increase, and the second filter 33 is a polyester filter.

[0050] In this embodiment, the second filter 33 uses a polyester filter to intercept and filter the paint particles in the air, which are then filtered by the third filter 43. The third filter 43 includes a non-woven fabric to further intercept the paint particles in the air.

[0051] The working principle and use process of the present invention: After the present invention is installed, it is used for ventilation, and the paint mist enters the paper box 1 from the air inlet 11 of the paper box 1 along the wind. First, the paint mist enters the loading center along the guide plate 212. The larger the particles in the paint mist, the greater the inertia. Therefore, the larger particles in the paint mist are blocked and intercepted by the cone tip part of the V-shaped plate 211 in the first barrier layer 2. The wind carries the smaller particles in the paint mist through the first through hole 213 on the V-shaped plate 211, and then is intercepted by the flame-retardant professional paint mist cotton 5 located between the first barrier layer 2 and the second barrier layer 3 for the second interception, and then hits the primary filter layer 31 of the second barrier layer 3 to further filter the larger particles, and then partially passes through the second through hole 32 and is filtered by the second filter 33 in the second through hole 32, and finally is filtered by the third filter 43 including non-woven fabric on the third through hole 42 on the third barrier layer 4, forming pure air discharged to the outside.

[0052] Example 1: Application of DF paint mist collector in dry spray room:

[0053] Dry spray booths do not use water mist or water curtains but directly use filter materials to capture paint mist. They are gradually favored by the coating industry due to their small size, low cost, no use of chemical agents to capture paint mist, and no wastewater. Their more environmentally friendly label has become the mainstream development direction of spray booths. Traditional dry spray booths are mostly used for spray painting of smaller parts. When environmental protection laws and regulations are not strict enough, the use of paint mist filtration with low filtration efficiency can be barely accepted. However, with the government's restrictions on VOC emissions and the collection of emission fees, spray paint mist treatment has become a hot topic of concern.

[0054] Among them: Due to the upgrade of VOCs emission standards, a factory in Beijing had to abandon the original paint mist felt filtering method in the hope of better protecting the VOCs treatment unit. The factory's production line is manual single-side spraying and horizontal side exhaust.

[0055] The design parameters of the dry spray room are shown in Table 1.

[0056]

[0057] The original paint mist filtration system consists of four stages: the specific material arrangement is palm fiber layer, two F5 filter cottons, (maze-type) metal baffles and activated carbon;

[0058] Before the transformation of the production line, the second-stage filter material F5 filter cotton needed to be replaced every day. The wind pressure in the spray room changed from negative pressure to positive pressure after every 6 hours of production. Because the exhaust system was severely blocked by paint mist, the paint mist began to escape to the outside of the spray room. In addition, the downstream activated carbon was also contaminated by the paint mist, and the adsorption efficiency decreased rapidly, resulting in VOCs emissions not meeting the standards.

[0059] After analyzing the on-site working conditions, the paint mist filtration unit was improved by removing the original metal baffle + F5 filter cotton + palm fiber layer and installing a DF paint mist collector to directly capture the paint mist. After simple modification, a DF paint mist collector was installed with dimensions of 485×485×495mm and a single ventilation volume of 1500m3 / h. The actual service life was 9-14 days. Through continuous follow-up data collection, the average weight of dry paint captured by each DF paint mist collector was 25kg, and the replacement pressure difference was 300Pa. After actual filtration, the air duct was clean and the adsorption function of activated carbon was greatly improved. The application of DF paint mist collector improved the stability of the dry spray room and ensured that VOCs emissions met the standards.

[0060] 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A box-type DF paint mist collector, characterized by: The invention comprises a honeycomb paper paint mist filter paper box (1), wherein the paper box (1) is a box body with ventilation penetrating opposite surfaces, wherein two groups of honeycomb papers with openings of different sizes are stacked in staggered layers in the paper box (1) as a first barrier layer (2) and a second barrier layer (3), and a third barrier layer (4) comprising non-woven fabric is arranged at the end of the paper box (1) to control the filtering accuracy; the first barrier layer (2), the second barrier layer (3) and the third barrier layer (4) are arranged in sequence in the paper box (1) according to the direction of air flow, wherein the first barrier layer (2) comprises a plurality of loading layers (21) connected in parallel, and the second barrier layer (3) comprises a plurality of loading layers (21) connected in parallel. The invention relates to a filter element (21) and a first filter layer (31) connected together, wherein the third barrier layer (4) comprises a fine filter layer (41); the loading layer (21) comprises a V-shaped plate (211) and two guide plates (212), wherein the two guide plates (212) are respectively arranged on the outer sides of the V-shaped plate (211) and are bent inwards for guiding air to the tip of the V-shaped plate (211); a first through hole (213) is provided on the V-shaped plate (211) on the back side of the guide plate (212); the first filter layer (31) is arranged in a V-shape, and a plurality of second through holes (32) are provided on the surface, and a second filter (33) is provided inside each of the second through holes (32).

2. A box-type DF paint mist collector as claimed in claim 1, characterized in that: The fine filter layer (41) is arranged in a flat plate shape and has a plurality of third through holes (42) formed on its surface, and a third filter (43) is arranged inside each of the third through holes (42).

3. A box-type DF paint mist collector as claimed in claim 1, characterized in that: Two opposite side surfaces of the paper box (1) are arranged to be through-connected to serve as an air inlet (11) and an air outlet (12), respectively, and the upper surface of the paper box (1) is provided with a cover plate that can be lifted upwards.

4. A box-type DF paint mist collector as claimed in claim 1, characterized in that: Flame-retardant professional paint mist cotton (5) is filled between the first barrier layer (2) and the second barrier layer (3).

5. A box-type DF paint mist collector as claimed in claim 2, characterized in that: The filtering effects of the second filter (33) and the third filter (43) on paint particles in paint mist gradually increase, and the second filter (33) is a polyester filter.

Images