The equipment has reasonable layout and convenient maintenance, and is suitable for light rail paint spraying and drying. It has sufficient strength, small thermal deformation, can work continuously for 24 hours, stable operation and reliable performance

Comply with the national labor, production, safety and health policies and regulations, implement the relevant national environmental protection regulations, and the whole project meets the specified "three wastes" emission standards and industrial health standards.

In full consideration of the reliability and safety of equipment operation, PLC programmable automatic control is adopted for the electrical control cabinet. The main components in the cabinet are imported products or domestic famous brand high-quality products to ensure the overall performance and quality of the equipment. The interlocking between systems shall be fully considered in the control system to avoid equipment accidents.

The equipment is equipped with complete lubrication and filtration devices, reliable safety protection, alarm and safety devices, and safety doors to prevent equipment damage and personal injury caused by misoperation or accidents.

Noise reduction room shall be added for all fans, and silencing facilities shall be provided to control the noise ≤ 80D

The process flow design of the production line is smooth, the layout is reasonable, convenient for operation and maintenance, and the appearance is neat and beautiful

Empty size in sand blasting room: 32500 × six thousand × 5000mm, through structure, skeleton made of high-quality profile steel, solid and reliable; The exterior is made of 75mm thick color steel sandwich plate, with beautiful appearance, convenient installation and durable corrosion resistance; The color steel sandwich layer is rock wool, which has good thermal insulation, fire protection, corrosion resistance and weather resistance, and ensures that the sand blasting noise is reduced below 500Hz; White wear-resistant rubber plates are installed around the interior of the room to effectively protect the sandblasting room

It is composed of sand blasting host, sand valve, stop valve, rotary feeding valve, high-speed spray gun, etc; Jiutong jt-11-900y high-efficiency and large-capacity sand blasting machine is adopted as the sand blasting host. It can be equipped with two sand control valves and two high-speed spray guns at the same time. The sand loading capacity is large, and one tank can contain about 5 tons of steel sand; The sandblasting tank is designed and manufactured according to ASME standards and meets the requirements of relevant national standards; The sand valve has the advantages of convenient adjustment, safety and reliability, and long service life (more than 3000 hours); The high-speed sandblasting gun is made of boron carbide and has a long service life of 800-1000 hours

The abrasive recovery technology is a strong honeycomb sand absorption floor. Compared with the mechanical sandblasting room, the foundation is shallow, and the capital construction cost is about 30% to 50% of the mechanical sandblasting room; The abrasives are recovered by wind power. The whole recovery system has no mechanical transmission and vulnerable parts. The equipment has small wear and maintenance is simple and convenient; Compared with the traditional sand absorbing floor, the sand absorbing floor has stronger sand absorbing ability and greatly reduces the sand blocking fault caused by the presence of welding slag, welding rod head and large particles; The air flow and dust are always from top to bottom. The dust concentration in the space above 0.5m is very low, the visibility is very high, and the working environment is good

The sand dust separator adopts cyclone + three-stage separation. The cyclone separator is an independent system. The first stage of three-stage separation is a unique inertial separator, the second stage is air flow cleaning, and the third stage is a screen separator. It can effectively separate foreign matters, abrasives, and dust larger than 0.1mm in the recovery system. The separated complete sand material is returned to the main machine of the sandblasting machine for recycling, The dust and crushed sand are sent to the dust collector for filtering and then stored in the dust collector for regular cleaning. The sand dust separator is provided with a maintenance ladder for easy maintenance

The filter cartridge structure can reduce the filtering wind speed of the dust collector while increasing the filtering area, thus reducing the dust emission; The filter material of the filter cartridge is a new type of material produced in Japan, 100% polyester fiber, with a thickness of 0.75mm, a maximum heat-resistant temperature of 80 ℃, a filtration accuracy of 5um-10um, a filtration resistance of ≤ 45pa, and a filtration efficiency of ≥ 99.99%; 4-72 centrifugal fan is used as the dust removal fan, and the shock pad is installed at the bottom of the fan. The equipment noise is ≤ 85dB.

The electric control system adopts S7-200 programmable controller produced by Siemens for centralized control. S7-200 series programmable controller is the latest product launched by Siemens in recent years. It has the characteristics of fast processing speed, stable and reliable performance, and more convenient communication and networking. Contactors and thermal relays are all products of Schneider, Delixi and other companies.

The chamber body adopts: δ 75mm thick rock wool sandwich insulation layer (rock wool density is 120kg / M ³）， The outer wall is 0.5mm color steel plate, and the inner wall is 0.5mm 304 stainless steel, so that the temperature of the outer wall plate is not higher than 5 ° C of the room temperature. The thickness of the inner and outer wall plates of the chamber is δ 0.6mm galvanized steel plate, filled with rock wool in the middle, the heat transfer coefficient shall not be greater than 0.38kcal / ㎡. H. ℃, and the average sound insulation shall not be less than 21.5r (DB). The column of the chamber is made of profile steel, and its strength, stability, thermal insulation, sealing, impact resistance and seismic resistance meet the requirements of national or industrial standards.

According to the control wind speed specified in gb14444-2006 safety regulations for painting operation and technical regulations for safety of paint booth, and according to the requirements of industrial painting, the paint booth is designed with micro negative pressure, that is, the exhaust air volume is slightly greater than 3-5% of the air supply volume, which can prevent external dust from entering the operation area. The unit is equipped with air inlet filter section, air valve, filter section, fan section and heating section.

The equipment is provided with sectional air supply and exhaust. The main exhaust fan is started only when painting. B4-72 explosion-proof centrifugal fan, fan and motor are explosion-proof; Considering the initial investment and operation cost, only one set of exhaust system is designed for the equipment, and the exhaust and waste gas treatment functions of each section are realized by controlling the switching of valves; During drying, four sets of exhaust fans with small air volume (air volume is about 5% of the air supply system) are additionally configured for indoor ventilation and discharge of high concentration circulating gas during drying to avoid waste gas overflow.

The spray booth is equipped with 2 sets of spraying systems. The spraying system is selected from the products of Graco company of the United States. The products have stable performance, high reliability and long service life. It is especially suitable for the automatic line of continuous operation, and effectively solves the production line shutdown problem caused by frequent failures; Robots can also be selected to replace the spray painting workers for spray painting. It can avoid the heavy labor of operators in the harsh working environment. At the same time, it can ensure stable workpiece surface quality and high production efficiency, and realize automatic spray painting!

In order to ensure the cleanliness of fresh air, the equipment adopts primary filtration and precision filtration on the top of the room (synthetic fiber filter material 3a-600g (F5) sub high efficiency filter top cotton is selected). After secondary filtration, the cleanliness of air supply can reach 10 μ 100% filter off dust particles above 3-10 μ M μ M) the number of dust is not more than 300 / cm ³。 The filter material is set at the bottom of the static chamber and supported by the top cotton support net. The top cotton support net is of high-quality C-shaped steel structure. After special rust prevention treatment, it has good rigidity, no corrosion and easy to replace the top cotton.

Left, middle and right exhaust ducts are set on the floor of the paint booth. The paint mist filter device is installed in the air duct. During spraying, the spray mist can pass through the flat filter cotton with the air flow, and a large amount of paint mist is absorbed, with an adsorption efficiency of more than 98%. The paint mist filter device is composed of PA-50 filter fiber support net and filter fiber cotton. When replacing, remove the upper floor grid, take out the tiled filter cotton and support net, then replace the filter cotton, and then lay a new filter cotton. The saturated filter bottom cotton is sent to the incinerator for incineration to prevent environmental pollution.

In the scheme, the user's investment and the local environmental protection policies of the project are considered. The whole equipment adopts activated carbon adsorption bed filtration, and the catalytic combustion equipment interface is reserved to provide additional facilities for the future environmental protection requirements upgrading. The organic waste gas can be adsorbed by using the adsorption characteristics of activated carbon micropores. The waste gas with low concentration, low temperature and hydrocarbon can be treated. The solvent can be recovered and reused. The purification efficiency of organic waste gas is as high as 90-95%. The adsorption of organic solvent before regeneration can reach 25% of the total weight of activated carbon. The iodine value of the self-contained activated carbon of the equipment is ≥ 800, and the carbon content is ≥ 15m ³， 4 activated carbon adsorption beds, each volume ≥ 4.3m ³， The drawer structure is adopted in the structure, so that it can be replaced quickly

The paint booth adopts a control system composed of LCD touch screen and Siemens PLC. Through the touch screen, the start and stop of the whole paint booth can be controlled, and the parameters such as operation time and temperature can be set and controlled, and the equipment of each unit in the paint booth can be controlled. It is possible to display the working state of each main device. The control system is safe and reliable, easy to operate, and has various protection and alarm functions. It has multi-function automatic conversion function, and can realize automatic conversion function operation such as normal temperature painting, temperature rise painting, drying and dehumidification on the control console. When the equipment status is changed, all relevant automatic valves can be automatically changed.