New environmentally-friendly painted steel barrel spray booth

Overspray mist collection and treatment generally adopts filtration, adsorption and separation technologies. Specifically divided into wet and dry two.

The most common wet method is the water (oil) curtain adsorption separation method. Among them, the curtain spray booth is the earliest and the most widely used. Whether it is an early long curtain or a recent multi-stage curtain, the humidity of the painting space is inconsistent with the humidity requirement of the painting environment due to the water. Sometimes water ( Oil splashes directly damage the quality of the paint film. The pollution that it generates and the related equipment cleaning and repair are dirty and tired. From the production cost, the equipment investment is large, and the operating cost is high. For example, a 3m wide and 2.5m high water curtain spray booth requires about 20,000 yuan for pumps, pipes, and sink related equipment, and the pump is equipped with a motor of 4.5kw for 1 hour consumption. 4.5 electricity costs 3 yuan. It is also difficult to avoid the noise generated by water curtains. Due to wet equipment cleaning and maintenance costs are also greater.

Because of this, while improving the equipment for wet adsorption and separation of paint and fog, dry filter adsorption technology has emerged. One of the earliest applied methods was to improve on the basis of the oil curtain spray booth, that is to use a door-shaped steel plate overlapped and placed several times like a curtain wall. It is not hard to imagine that the light* changes the direction of the airflow and makes the paint fog adhere to the wall. In addition to the paint fog efficiency, it is not enough. For this reason, a fiber filter mat is added at the back. This kind of dry paint spray room has the effect of removing paint fog. Still not bad, overcomes the main drawback of wet type. However, due to the need to consider the cleaning of laminated paint and the replacement of the fiber mat, a maintenance channel and an inspection door must be provided between the two, so its floor space is more than double the original wet type. There are also more materials for equipment, and the same amount of cleaning and maintenance work is also greater. In addition, we have also seen in some discontinuous spray production stations that the fiber filter mat is placed in front of the stack, which, although it eliminates the need for access channels and reduces the amount of cleaning work on the paint stack, From the effect of use, the viscous lacquer solution will quickly clog the fiber surface. Although this fiber pad is not costly, it is not suitable for use in the assembly line because it is replaced too frequently.

In recent years, with the development of spray equipment technology at home and abroad, there have been new developments in this area. With the strengthening of human environmental awareness, higher requirements have been put on the treatment of overspray mist in painting production. In order to catch up with the pace of the times, our country's coating industry has learned to absorb foreign coating equipment technology while developing a composite pleated labyrinth paperboard paint mist absorption separator in combination with national conditions. Its idea is to absorb overspray fog. Separation efficiency and durability of the material, while considering it applies to the original wet or dry air paint removal system, the original ventilation system does not change, just use this to replace the water (oil) curtain or fiber filter mat part. The separator is made of special composite corrugated paper, punched and bonded to form a V-shaped labyrinth pleated cardboard, and then assembled with a metal frame plate to form an efficient paint mist separator.

The working principle of the paint mist separator is the special design and distribution of the holes in each V-shaped maze, so that the air flow produces a Venturi whirlwind effect. The varnish paint liquid that has been sprayed is stopped and accumulated on the V-shaped wall of the labyrinth.

Efficient separation results from this Venturi effect, which is the combined use of paint inertia in paint fog and local changes in the velocity and direction of the air flow in the labyrinth. The reason why this type of labyrinth separator is used for a long time is mainly the shape of each labyrinth. The cavity can provide enough space for paint accumulation, concentration and separation. Its separation effect on the paint mist is greater than any of wet or dry filtration, and the service life can be more than 5 times that of the fiber mesh, and the separation efficiency can reach 98%.

The application of this composite pleated labyrinth paperboard to separate and spray paint spray technology makes the design of the paint booth more cost-effective. The V-shaped labyrinth adsorption separation tank can be placed upright and rich in rigidity. After careful design, installation and replacement are very convenient. The V-shaped pleated maze board can be folded like an accordion and is easy to post, handle, and store. It will naturally expand during installation. Compared with other large-volume filter mats, it is more convenient to operate. The operating cost is lower than that of the water curtain pump of the same curtain spray booth, and it also saves the material cost of the water and paint fogging agent.

The newly developed DN-210 series composite pleated maze board separator is H680, each of which is B840. Place it in the partitioning grid, and use the stop bar to position it up and down. Use the packing tape at the two interfaces to stick. After using for a period of time, if it is found that the front plate of the V-shaped paperboard is plugged with paint, just replace the piece. When replacing, simply remove the upper and lower stop bar nuts, take the stop bar and tear the tape off. Pull it down with a hook and put new cardboard on the line. Generally, it does not need to be completely replaced, and it is more economical to replace it in places where there is a lot of fog.

From the recent examples of promotion and application, it is indeed a green product and is greatly welcomed by users.