The determination of the process plan of the production line shall fully consider the practicability and progressiveness of the technology, and fully meet the requirements of product quality and production program; The selected technology is mature and reliable, without any test

The design and selection of process equipment of the production line adopt advanced technologies at home and abroad to ensure the realization of the process and various technical parameters; Coating technology and equipment with high efficiency, low energy consumption and low pollution shall be adopted as far as possible

The environmental protection, safety and three wastes treatment involved shall be designed according to relevant standards and specifications and put into operation at the same time with the equipment; The control system takes full account of the interlocking between the systems, and takes protective measures at the temperature and system resistance to avoid equipment accidents

For self-made equipment on the production line, common parts and standard parts shall be used as much as possible in the structural design to improve the product standardization and facilitate maintenance, fully consider the improvement of the production and working environment and labor hygiene conditions, and implement the relevant national and industrial standards and regulations

The overall layout of the production line shall fully consider the rationality of the process flow of the whole production line, and the equipment layout shall be coordinated, orderly, beautiful and convenient for operation and maintenance

All equipment of the production line shall be practical, reliable and safe. Purchased equipment and components shall be used. Imported products shall be used for key equipment and domestic high-quality brand products shall be used for general equipment

The shed body is an overall closed double-layer plate structure, which can complete degreasing, washing and other processes at one time. The top plate of the shed body is made of SUS304 & 1.5mm stainless steel plate, the inner plate is made of SUS304 & 1.5mm stainless steel plate, and the bottom drain plate is made of SUS304 & 2.0mm stainless steel plate, with high strength and durability; Full welded connection structure between steel plates to ensure no leakage for ten years; The insulation layer is 50mm high-quality rock wool with good thermal insulation.

The material of the inner plate of the tank body is SUS304 & amp; 2.5t stainless steel plate, all of which are fully welded; The outer plate material is SUS304 & amp; 0.8t stainless steel plate; The middle is connected with 50 angle steel as the reinforcing rib, and the appearance of each liquid tank is flat and regular; The insulation layer is 50mm high-quality rock wool, with good insulation performance; Main and auxiliary tank structure: double layer stainless steel filter screen is set between the main and auxiliary tanks to prevent sundries from sucking into the water pump, blocking the nozzle and damaging the impeller

The spray system is composed of main pipe, spray pipe, water pump, nozzle, interceptor, filter and other components. The spray pipe is SUS304 pipe, and the spacing between each spray pipe is 300mm. Flange connection is adopted to facilitate maintenance and cleaning. The spacing between the nozzles on each spray pipe is 300mm, and the nozzle with adjustable angle is selected. The water pump is a pipeline pump. Valves are set at the inlet and outlet of the water pump to facilitate the maintenance of the water pump. A filter is set at the inlet of the water pump.

The dehydration furnace is heated by hot air circulating gas, and the drying channel is a through type drying channel. In order to make the indoor temperature distribution uniform and ensure the baking effect, the circulating mode of lower air supply and upper air return is adopted in the design of this scheme, which effectively utilizes the indoor space, improves the indoor effective volume utilization coefficient, saves energy, reduces the installed power, and facilitates the cleaning of the drying channel.

The oil-water separation equipment adopts oz series products of Japan Sanjin company, which occupies a high share in the field of coating pretreatment. The oil-water separation treatment capacity is 1400l / h, and the efficiency, stability and safety are high.

For the dehydration and drying furnace, the waste gas is directly discharged at high altitude through the manual butterfly valve and the waste gas discharge pipeline.

Thickness of inner and outer wall plates of the chamber δ 0.5mm galvanized steel plate, filled with sandwich insulation layer rock wool, rock wool δ 100mm thick, density 120kg / M ³， The temperature of the outer wall plate shall not be higher than 5 ℃ of the room temperature, the heat transfer coefficient shall not be greater than 0.38kcal / ㎡. H. ℃, the average sound insulation capacity shall not be less than 21.5r (DB), and the sealing and thermal insulation performance shall be good.

The ceiling of the chamber is provided with an air distribution room; The length and width of the air distribution chamber are the same as that of the painting area, with a height of about 1500mm. The filter material of the static chamber is of plate and frame structure. A differential pressure gauge and an overpressure alarm device are set at the filter of the static chamber, so as to replace the blocked filter material in time

To ensure that the wind speed of the spray booth complies with gb14444-2006 safety regulations for painting operation and technical regulations for safety of spray booth, the modular design concept organically combines the air supply and heating systems into a set of modular systems, and skillfully organizes the air flow in them. The framework of the module system is welded by industrial profiles, and the surface is paved δ 100mm rock wool color steel sandwich panel, and access doors are set in each functional area.

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.

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 air source cleanliness can reach 10 μ The filter material is arranged at the bottom of the static chamber and supported by the top cotton support net. The top cotton support net adopts high-quality C-shaped steel structure. After special antirust treatment, it has good rigidity, no corrosion and is easy to replace the top cotton.

The lifting is stable, the transportation is reliable, and the structure is reasonable. The operator only needs to press the six buttons of lifting, lowering, advancing, retreating, front and rear to realize the horizontal, vertical and front and rear movement of the working platform. The two sides of the extended platform are equipped with iron chain guard rails, limit switch safety voltage, cable duct / junction box / motor explosion-proof type to ensure its safety.

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.

The column, beam and purlin of the framework of the room are made of profile steel. All framework materials are subject to anti-corrosion treatment, with good thermal insulation performance and large bearing capacity; The thickness of wall plate in the chamber is δ 0.5mm color steel plate, the thickness of outer wall plate is δ 0.50mm corrugated color steel plate with intermediate filling δ 100mm thick rock wool sandwich (rock wool density is 120kg / m3) insulation board, and the material of the chamber body is δ 1.5mm cold plate, so that the temperature of the outer wall plate is not higher than 5 ° C of the room temperature; The insulation wall panel is of tongue and groove type structure; Imitation door openings are set at both ends of the chamber, and the size of the door openings is (W × H)：400 × 2900mm

The infrared radiation preheating section adopts the gas infrared burner, which has the advantages of high efficiency, energy saving, low pollution, economic and practical, and simple installation. Compared with the electric drying, the cost is reduced by more than half. With high heating value of liquefied petroleum gas / natural gas, the temperature in the oven can be made even without fans. It has the unique features of free installation, simple, and 50% less gas consumption than power consumption. It is an ideal supporting product for oven and tunnel furnace.

The air heating system of hot air circulation section is composed of Italian "Baide" brand gas burner and air heat exchanger. In order to ensure the adhesion between the paint film and the workpiece substrate in winter, it is generally required that the ambient temperature should be ≥ 15 ゜ C. the added heating device ensures the spraying effect of the operation at low temperature in winter and is integrated into the air supply system; According to the requirements of heating power value in winter, btg28p two-stage fire gas burner of Italian "Baltur" company is selected as the burner, which is safe and energy-saving

4-72 / 4-73 centrifugal fan, no temperature resistance requirement, belt pulley drive, low energy consumption, high efficiency and strong stability; The fan base adopts channel steel, angle steel and industrial profiles welded into a frame, which is firm and durable; Multi blade impeller, made of 16Mn, with noise no more than 85dB (a); The air volume, air pressure and other parameters of the fan meet the design requirements

The drying temperature can be adjusted and set as required to meet the needs of coating production development and different coatings; The temperature in the furnace is displayed and automatically controlled by the digital temperature controller. The collected signal is sent to the temperature controller of the control cabinet. The temperature controller automatically controls the work of the burner according to the set drying temperature value to ensure that the temperature in the chamber meets the completion of the drying task; It has the function of overtemperature sound and light alarm and automatic interlock shutdown

A filter device is set at the air outlet to ensure the cleanliness of circulating air. 3001gg high-temperature resistant coarse effect flat filter is selected. It is made of alkali free glass fiber filaments. The fiber layer is thin to dense from the windward side to the leeward side, effectively blocking dust. It has the characteristics of large air volume, small resistance, flame retardancy, chemical corrosion resistance and excellent radiation resistance.

The organic waste gas can be adsorbed by using the adsorption characteristics of activated carbon micropores, and the waste gas with low concentration, low temperature and hydrocarbon can be treated. The solvent can be recovered and reused, and the purification efficiency is as high as 90-95%. Activated carbon is a non-polar adsorbent with hydrophobic and organophilic properties. It can absorb most organic gases, such as benzene, aldehydes and ketones, alcohols, hydrocarbons, etc., as well as odor substances. After the adsorption is saturated, it can be desorbed and regenerated by hot air and put into use again

In order to block the heat loss when the door of the drying room is opened and reduce the energy consumption, the air curtain device is designed at the inlet and outlet of the drying room. The air curtain flow direction adopts the side supply and side suction structure. According to the calculation, the air volume of the air curtain air supply system is determined to be 5064m3 / h.

The column and beam are shared with the rigid frame of the stacking chain conveyor system, and □ 120 × one hundred and twenty × 5 square tubes as skeleton, δ The 1.5mm cold plate bending bar is used as the wall plate. Bolt connection is adopted between the wall plates, and self tapping screw connection is adopted between the wall plates and the skeleton. Tempered glass windows are set to facilitate observation of indoor working conditions. The leveling room usually adopts the ventilation mode of natural air intake and mechanical exhaust, and the waste gas treatment mode and the paint spraying room share the activated carbon adsorption desorption + RCO catalytic combustion.

Both the chamber wall and the chamber top are made of δ 50 double layer color steel EPS sandwich panel; Glass observation windows are symmetrically installed on the walls on both sides, and the glass is selected δ 5 floating flat glass, and fluorescent lamps and lighting fixtures are symmetrically installed on the upper part of the inner wall of the side wall; The frame column is made of F120 * 5, Q235-A high-quality rectangular steel, and other beam materials are Q235-A, which is solid as a whole; The frame column and top beam of the chamber are used as the bearing column and beam of the conveying line to reduce the cost. The air supply system, exhaust system and air filtration system are the same as those of the paint booth