Paint mist capturing device and process for spray booth

Abstract

The invention discloses a paint mist capturing device for a spray booth. The paint mist capturing device comprises a spray gun, a raw material paint tank, a solvent storage tank, a recycled paint storage tank and a separation tower, all of which are arranged in the spray booth. The separation tower is connected with an exhaust opening of a draught fan, a centrifugal machine, the solvent storage tank and a collection groove. The centrifugal machine is connected with the paint storage tank and the solvent storage tank. Multiple spray holes are evenly distributed in a solvent spraying pipe in the axial direction. A collection groove with the arc bottom face is formed below the solvent spraying pipe. The width of the collection groove is equal to the length of the solvent spraying pipe. An interlayer pore plate equidistant with the bottom face is arranged in the collection groove. An interlayer space is formed below the interlayer pore plate. The bottom face of the collection groove is provided with multiple liquid discharge holes connected to the separation tower through connection pipes. In the processing process, solvents are separated from captured paint through the centrifugal machine, the solvents are recycled, the separated paint can be recycled continuously, the loss is reduced, and the cost spent on waste water treatment is saved. The paint mist capturing device is convenient to maintain, low in investment, good in operation state and long in service life.

Description

technical field [0001] The invention relates to a technique for capturing paint mist in a spray booth. In particular, it relates to an environmentally friendly process for capturing high-efficiency paint mist in a spray booth, and belongs to the field of environmental protection technology. Background technique [0002] The spray booth is the key equipment necessary for the painting workshop. It is a room dedicated to painting operations and is widely used in industries such as automobiles, furniture, and packaging. In the painting process, its structure and equipment are complicated. The existing spray booths generally include water curtain spray booths, water wash spray booths, oil wash spray booths, pumpless spray booths, and water cyclone spray booths. [0003] The spray booth is a closed space, which can prevent the spray residue from escaping to the outside world. The spray residue in the spray booth will form a high-density and high-concentration state after long-ter...

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Problems solved by technology

[0004] Most of the current spray booths use vertical water curtains, and use circulating water containing chemicals to form water curtains on the surface of the vertical water curtains to capture excess paint mist, so as to separate VOC from paint mist, and then carry out environmental protection respectively. However, the existing technology has limited ability to capture paint mist, and the capture rate is low. This will cause the paint mist to be carried out by the gas, and the subsequent environmental protection treatment of organic waste gas will have a large load. At the same time, a large amount of waste water will be generated, which needs to be equipped with sewage treatment. Facilities, many civil engineering foundations, large investment, difficult maintenance, high operating costs, difficult to meet the needs of environmental protection and clean production, and short service life of equipment

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