Working principle during drying

Upper air supply and lower air return hot air circulation type. During drying, the fresh air valve is half closed and the exhaust valve is closed. The circulating air valve at the bottom of the supply fan is open. During drying, the circulating air is heated by the heat exchanger in the air supply / heating system. The drying design temperature is 0 ~ 60 ± 5 ° C, and natural gas is used as energy. Hot air is sent from the upper part and returned from the lower part. During the drying process of workpieces, the residual organic solvent in the paint film of workpieces is constantly volatilized. In order to make the content of organic solvent in the gas in the drying room lower than the lower limit of explosive concentration, the drying room keeps safe operation, a certain amount of fresh air shall be added to the circulating hot air, and a certain amount of high concentration exhaust gas shall be discharged. The drying room is equipped with a temperature sensor to display the temperature of each point and an automatic temperature regulating device to control the temperature fluctuation within ± 5 ° C.

3. Waste gas treatment equipment for air purification of wind power tower

Waste gas of roller paint→Paint mist filtration→Dry paint mist filtration + activated carbon adsorption→System fan→discharge         

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Activated carbon regeneration

The organic waste gas purification device adopts a configuration of multiple activated carbon beds and one catalytic decomposition bed; The treatment air volume of each activated carbon bed is 20000 or 30000m3 / h; All activated carbon beds share a catalytic decomposition bed, and desorption is carried out in turn when it is not working.

Main components: Schneider

Main material of chamber

The thickness of the inner and outer wall plates of the chamber is δ 0.5mm galvanized steel plate, filled with sandwich insulation layer rock wool, rock wool δ 100mm thick, density 180kg / 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. ℃, and the average sound insulation capacity shall not be less than 21.5r (DB); It has the advantages of beautiful appearance, good sealing effect, good thermal insulation effect and excellent impact resistance; The column of the room body is made of steel structural section steel, all of which are sand blasted and sprayed with primer and finish paint. It has strong rust resistance and weather resistance. Its salt spray resistance is ≮ 500h, and its strength, stability, thermal insulation, sealing, impact resistance and seismic resistance meet the requirements of national or industrial standards

gate

Adopt electric flexible lifting gate, steel welding stamping or aluminum alloy profile, anti-corrosion, salt and UV protection, track comprehensive accuracy: & lt; 3mm, one set is set at the entrance and exit of the room, and the surrounding is sealed. All tracks and door curtains are equipped with rubber seals, with good airtightness. The opening and closing speed of the door is 6-15m / min (self-defined), and the wind resistance performance: large use area (800-1500m2), and strong wind resistance performance (≤ grade 12); Safety measures: Low Voltage 24VDC control, infrared safety protection (or light curtain), door curtain operation warning light flashing, pressure airbag, etc. (some of which are optional); Control system: composed of Siemens programmable controller, Delta and other frequency converters or servo controller

emergency door

An outward opening safety door shall be set longitudinally in the room, and anti riot emergency lights shall be installed to facilitate personnel access and evacuation in case of emergency. Safety door size (width × Height) mm: 800 × 1900, the safety door is equipped with a mechanical pressure lock and an automatic door closer. When the pressure in the room exceeds 100Pa, it can automatically open the pedestrian door to relieve the pressure and play the role of explosion relief. According to the length of the roll coating drying room, 1-3 sets of safety doors are set at one side of the room

           Swiss bellmo air valve controller

        Air supply / heating box

        Explosion proof centrifugal fan

        Explosion proof centrifugal fan

                Graco manual high pressure airless spray gun

             Paint supply room

            Spraying robot

The labyrinth design of the box type filter uses the centrifugal principle to ensure better filtration of paint mist. The first and second layers are made of glass fiber flame-retardant filter materials with high filtration and purification efficiency and no secondary pollution, which have the characteristics of high dust volume; The third and fourth layers are made of high-efficiency non-woven fabric materials to ensure higher dust filtration efficiency. After purification by the dust treatment device, the dust concentration in the exhaust gas is ≤ 0.04mg/nm3. The dust filter material is installed in a drawer type, which is convenient and quick to replace

The high-efficiency filter material in F7 is a non-woven fabric composed of organic synthetic fibers and microfibers. It has a gradually increasing fiber structure, with an average capture efficiency of more than 99% and a temperature resistance of 90 ℃. The filter adopts modular design to facilitate assembly, installation and disassembly, so that the equipment has good practicability. The filter frame and floor adopt full welded structure to ensure no leakage and air leakage. All exhaust gases pass through the filter bag, and the paint mist capture efficiency is up to 99%.

Activated carbon

Activated carbon is mainly used for purification of various organic waste gases with low concentration and large air volume, including benzene, phenol, ester, aldehyde and other organic gases such as toluene, xylene and benzene, as well as odor gas. Jiutong activated carbon uses specially shaped honeycomb activated carbon with high micropore and high specific surface area as the adsorption material, with a specific gravity 8-10 times larger than that of strip activated carbon fiber, It has the advantages of large adsorption capacity (the adsorption of organic solvent before regeneration can reach 25% of the total weight of activated carbon), small resistance, fast adsorption speed, low operating cost and long service life. The purified gas fully meets the environmental emission requirements.

Catalytic decomposition bed

When the organic waste gas passes through the honeycomb ceramic catalyst decomposition bed, HC molecules and O2 molecules are respectively adsorbed on the catalyst surface and activated, so it can be rapidly and completely oxidized and decomposed into harmless carbon dioxide and water vapor at a lower temperature (200-300 ℃), and heat is released at the same time; All processes will not cause secondary pollution. The purification rate of catalytic decomposition is generally above 98%, and the reaction temperature is low and no × Generated. Using high-quality noble metal palladium and platinum as catalysts, the catalytic decomposition rate is more than 99%. It has the characteristics of high specific surface area, large reaction space velocity, long service life, low decomposition temperature, low resistance, short desorption preheating time, low energy consumption, high mechanical strength, wear resistance, heat shock resistance, good catalytic activity and thermal stability

                      Lighting device

        Safety alarm system

        PLC display interface

         Electronic control system