I. Overview:

In the spraying production line of automobile products, surface painting of construction machinery, household appliances, various electronic products of purified air supply system, the circulating hot air heating device matched with drying room, drying room and drying path is heated indirectly by using heat source (natural gas, liquefied gas, diesel oil, steam, heat conducting oil, electricity, etc.). The heat exchanger, high temperature filter and circulating fan are assembled on the insulating box to form an integral circulating air heating device (equipment). In industrial design, they are referred to as "three-dimensional" hot air heating furnace (LRF), or "three-dimensional" hot air furnace or "three-dimensional" heating device.

If the organic waste gas from volatile overflow in drying process is introduced into the high temperature furnace with the function of waste gas incineration sintering structure, this kind of hot blast stove is also called "quaternary" hot blast stove or heating device.

The ternary hot air heating furnace has the advantages of modular structure, energy saving, high efficiency, safety, high quality of circulating hot air, and beautiful appearance. It is more convenient, fast and convenient for design, selection, transportation, installation, construction, operation and maintenance. It has been widely used in many spraying production lines and drying equipment in recent years. Used with remarkable effect, it is welcomed by engineers and technicians and users.

2. Product characteristics:

"Three-element" hot-blast stove heating device structure design professional standardization; manufacturing modularization, quality control standardization; matching parts performance is advanced and reliable; temperature control automation; whole machine quality stability is good, easy to Design Institute selection, project matching, compared with domestic similar products have the following. Characteristics:

1. The appearance of the device is square and smooth, the quality of hot air is stable, and the service performance is reliable.

2. Adopt large heat exchange area structure, complete combustion, high thermal efficiency and energy saving;

3. The internal heat energy converter adopts stainless steel seamless steel tube structure, which has large heat transfer area per unit volume and high heat transfer efficiency.

4. Both the combustion chamber and the thermal energy converter expand freely, the heat transfer surface is arranged reasonably, the temperature rises quickly and the heat load is uniform.

5. Burner failure self-locking, blowing before starting, structural design with pressure relief outlet, reliable safety performance;

6. Temperature of the external wall of the incubator: = ambient temperature + 15 C;

7. The overall performance of the equipment is good, and the noise is lower than or equal to 85dB (A).

8. The service life of the whole machine is more than ten years.

9. "Quaternary" hot blast stove purified organic gas emissions to meet the comprehensive emission standards of air pollution (GB16297-1996).

3. Basic configuration of "ternary" hot blast stove:

1. Insulation box panel: 150 mm rock wool insulation panel (outer galvanized corrugated board, inner galvanized board); with circulating air inlet and outlet, maintenance door, pressure relief hole, exhaust outlet, fresh air filter control valve; differential pressure meter, thermocouple probe, etc.

2. Burner: BYD, Riyal Road, Wesso, Maxon, Tianshi and many other brands for selection;

3. Thermal energy converter: burner material SUS321; heat exchanger material SUS304;

4. High temperature filter: galvanized sheet frame, temperature-resistant 250 C filter layer, high filtering accuracy;

5. Circulating fan: Inserted high temperature resistant, explosion-proof, low noise, durable;

6. Thermal efficiency of thermal energy converter: 85% - 95%;

7. After the hot air is heated by circulation, the outlet air temperature is controlled at 40 ~280 C, and the temperature is measured, controlled and controlled automatically by program.

8. The "three-element" hot stove can be designed as an upper type, a landing type and a side-mounted type.

9. Calorific value of natural gas combustion: 8500 kcal/Nm3; calorific value of light diesel combustion: 10200 kcal/kg.