Boiling dryer is one of the more commonly used drying equipment, also known as fluidized bed, divided into two categories of vertical and horizontal, generally by a host of heater, fluidized bed, cyclone, bag filter and induced draft fan , console, six major components. The main principle of its work, the use of air through a heat exchanger is heated to form a distribution of hot air through the valve plate into the host, wet material from the feeder into the dryer, boiling state is formed due to the role of wind pressure, the material in the dryer, and extensive contact with hot air and drying materials to be completed in a shorter time.
Boiling Drier very obvious advantages:
First, the good effect of heat transfer, temperature uniformity, and production capacity;
Second, due to the uniform temperature, it is possible to avoid local overheating, suitable for the thermal drying of the material;
Third, the device flexible operation the intermittent operation both can achieve continuous operation can be performed;
Fourth, the drying time is flexible and can maintain the stability of the product moisture content;
Fifth, safe and convenient to operate;
Sixth, boiling the dryer equipment cost, and easy maintenance.
Scope boiling dryer also very extensive, such as pharmaceutical, food and other industries in granulated, powdered or granular wet material drying and Drug coating and so on. This shows that the boiling dryer has played a huge role in the pharmaceutical field.
But in the process should be noted material and the space inside the machine than the effective drying time, the size and shape of the dried material and other factors affect the drying effect, so as not to impair product quality.
In recent years, the boiling dryer a marked improvement in its technology and techniques, to better adapt to market its requirements. I believe that as technology advances, the scope of application of boiling drying equipment will be further expanded.
Boiling for some domestic the dryer explosion consciousness imperfect, just take a simple proof measures can not ensure the safety of the operating personnel, plant, and there are certain risks in the production. Often fixed manufacturing equipment in the concept of "In the past, such incidents did not happen, this should not be too serious" complex words With the strengthening of safety awareness and future dry material components of such equipment explosion-proof requirements mentioned to the urgent level.
Over the years, production boiling granulating machine production experience, combined with characteristics similar foreign equipment, the the boiling dryer structure to take the necessary preventive measures.
Measures to boiling dryer anti-dust explosion
The powder in boiling dryer boiling to prevent anti-dust explosion can draw the following measures:
1) removal of ignition sources, explosion suppression system for possible fire source equipment and devices shall be installed in explosion-proof membrane or pressure relief valve in the dust or dust filter equipment and piping.
2) often clear bag of pipe and trap dust, no dust accumulation.
3) electrical equipment should be explosion-proof equipment, explosion-proof motor, installation of ground.
4) plant designed to meet the requirements for the prevention of dust explosions, press blast-resistant design, and have enough explosion relief area.
3. Explosion-proof security in boiling dryer applications |
The boiling dryer advantages are clear, but to do anti-dust explosion, measures