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2. Preventive measures for powder safety in boiling and drying equipment
For the potential safety hazards caused by the boiling of the powder in the boiling and drying equipment, there is a certain literature on the prevention of the occurrence of the second type of hidden dangers of the powder. As a boiling drying equipment, the following reference can be made.
2.1 Anti-static measures for boiling drying equipment
The measures for prevention of static electricity by boiling in the boiling drying equipment are as follows:
1) The trapping bag is made of anti-static fiber material to eliminate the static electricity on the powder entering the bag in time, and to avoid peeling and electrification when the powder aggregates off.
2) Conductor material is used as the air supply duct and the connecting parts of the connecting parts, and the whole system is carefully connected to make the electrostatic energy on the powder lead away in time.
3) Other methods, such as increasing the pipe diameter, reducing the elbow, cleaning and discharging the material regularly, and operating the worker's wear of the antistatic clothing, are also effective in suppressing, reducing, and eliminating static electricity in the process of powder boiling.
2.2 Boiling Drying Equipment Measures against Dust Explosion
The measures for the prevention of dust explosion in powder boiling in the boiling and drying equipment are as follows:
1) The ignition source should be removed. The explosion suppression system should be installed for the equipment and equipment that may generate ignition sources. The explosion-proof membrane or pressure relief valve should be installed in the dust removal or filter equipment and pipeline.
2) Regularly remove the dust from the pipes and trapping bags and do not have dust accumulation.
3) Use explosion-proof devices for electrical equipment, such as explosion-proof motors, installation of ground wires, etc.
4) The design of the plant should meet the requirements for preventing dust explosion. According to anti-knock design, there must be enough explosion-proof pressure relief area.
3. Application of explosion-proof safety in the company's boiling drying equipment
In view of the imperfectness of some boiling and drying equipment in the country, only a simple explosion-proof measure is taken to ensure the safety of operators and factories. There are certain hidden dangers in production. It is often fixed in the concept of “no accidents of this kind in the past, which need not be too serious†to manufacture equipment. With the strengthening of safety awareness and the complexity of future dry material components, the explosion-proof requirements for such equipment have been mentioned. To the eager class. Therefore, Changzhou Changhong Drying Equipment Co., Ltd. has adopted the production experience of boiling granulator for many years and combined with the characteristics of similar foreign equipment, especially boiling drying equipment in the structure to take the necessary preventive measures. An example of explosion-proof boiling drying equipment developed by the company is now used to illustrate the application of explosion-proof structures.
The new explosion-proof granulation coating machine has two to three levels of air inlet filtration, and the induced draft fan is equipped with a silencer. The entire granulation and coating process is in a closed state from inlet, atomization and exhaust, achieving high efficiency and energy saving. effect. In addition to the use of anti-static fiber material for the trapping bag, the pressure difference at both ends of the dust bag filter can be automatically measured and controlled to maintain the best fluidized state in the bed. Among them, the equipment is divided into two catching chambers, a total of two catching bags, the bottom edge of each catching bag is fixed with the air bag structure and the bottom edge of the cloth bag. When the bag rack and the air bag structure are pulled into place, the air bag is inflated and inflated to put the cloth bag. The lower edge of the seal with the upper body inner wall. This structure is easy to operate, and the operator does not need to climb to a high place to disassemble the bag.
The upper part of the main unit is equipped with explosion-proof devices. When a positive pressure is generated inside the main engine, the pressure warning mechanism in the explosion-proof door F emits a gas signal, and the entire system is powered off by gas-to-electricity conversion. The fast valves a and b are quickly closed, and if the cylinder pressure continues When it is raised, the explosion-proof door F is automatically opened, and the explosion gas is discharged from the host through a vent channel to ensure the safety of personnel and equipment. The explosion explosion test was tested by the Tianjin Pharmaceutical Machinery Testing Center of the State Economic and Trade Commission. When the positive pressure in the main cylinder exceeds 0.8 kg/cm2, the explosion door opens automatically.
In addition, the equipment electrical parts should have explosion-proof measures, explosion-proof fans, observation lights explosion-proof. In addition, safety grounding and other installation requirements are emphasized in the instruction manuals and electrical installations, which are related to the total grounding facilities of the equipment manufacturer.
Explosion-proof granulation coating machine with the above structure has been introduced to the market. The equipment has granulation, coating, drying function and explosion-proof performance. It is suitable for powder, granules, and powders of Chinese and western medicine, food, chemical industry and other industries. The surface coating of the pills is coated.
4. Summary
The above discussion on the two problems associated with static electricity and dust explosion in powder boiling has reaffirmed the importance of explosion-proof safety for boiling drying equipment.
For the potential safety hazards caused by the boiling of the powder in the boiling and drying equipment, there is a certain literature on the prevention of the occurrence of the second type of hidden dangers of the powder. As a boiling drying equipment, the following reference can be made.
2.1 Anti-static measures for boiling drying equipment
The measures for prevention of static electricity by boiling in the boiling drying equipment are as follows:
1) The trapping bag is made of anti-static fiber material to eliminate the static electricity on the powder entering the bag in time, and to avoid peeling and electrification when the powder aggregates off.
2) Conductor material is used as the air supply duct and the connecting parts of the connecting parts, and the whole system is carefully connected to make the electrostatic energy on the powder lead away in time.
3) Other methods, such as increasing the pipe diameter, reducing the elbow, cleaning and discharging the material regularly, and operating the worker's wear of the antistatic clothing, are also effective in suppressing, reducing, and eliminating static electricity in the process of powder boiling.
2.2 Boiling Drying Equipment Measures against Dust Explosion
The measures for the prevention of dust explosion in powder boiling in the boiling and drying equipment are as follows:
1) The ignition source should be removed. The explosion suppression system should be installed for the equipment and equipment that may generate ignition sources. The explosion-proof membrane or pressure relief valve should be installed in the dust removal or filter equipment and pipeline.
2) Regularly remove the dust from the pipes and trapping bags and do not have dust accumulation.
3) Use explosion-proof devices for electrical equipment, such as explosion-proof motors, installation of ground wires, etc.
4) The design of the plant should meet the requirements for preventing dust explosion. According to anti-knock design, there must be enough explosion-proof pressure relief area.
3. Application of explosion-proof safety in the company's boiling drying equipment
In view of the imperfectness of some boiling and drying equipment in the country, only a simple explosion-proof measure is taken to ensure the safety of operators and factories. There are certain hidden dangers in production. It is often fixed in the concept of “no accidents of this kind in the past, which need not be too serious†to manufacture equipment. With the strengthening of safety awareness and the complexity of future dry material components, the explosion-proof requirements for such equipment have been mentioned. To the eager class. Therefore, Changzhou Changhong Drying Equipment Co., Ltd. has adopted the production experience of boiling granulator for many years and combined with the characteristics of similar foreign equipment, especially boiling drying equipment in the structure to take the necessary preventive measures. An example of explosion-proof boiling drying equipment developed by the company is now used to illustrate the application of explosion-proof structures.
The new explosion-proof granulation coating machine has two to three levels of air inlet filtration, and the induced draft fan is equipped with a silencer. The entire granulation and coating process is in a closed state from inlet, atomization and exhaust, achieving high efficiency and energy saving. effect. In addition to the use of anti-static fiber material for the trapping bag, the pressure difference at both ends of the dust bag filter can be automatically measured and controlled to maintain the best fluidized state in the bed. Among them, the equipment is divided into two catching chambers, a total of two catching bags, the bottom edge of each catching bag is fixed with the air bag structure and the bottom edge of the cloth bag. When the bag rack and the air bag structure are pulled into place, the air bag is inflated and inflated to put the cloth bag. The lower edge of the seal with the upper body inner wall. This structure is easy to operate, and the operator does not need to climb to a high place to disassemble the bag.
The upper part of the main unit is equipped with explosion-proof devices. When a positive pressure is generated inside the main engine, the pressure warning mechanism in the explosion-proof door F emits a gas signal, and the entire system is powered off by gas-to-electricity conversion. The fast valves a and b are quickly closed, and if the cylinder pressure continues When it is raised, the explosion-proof door F is automatically opened, and the explosion gas is discharged from the host through a vent channel to ensure the safety of personnel and equipment. The explosion explosion test was tested by the Tianjin Pharmaceutical Machinery Testing Center of the State Economic and Trade Commission. When the positive pressure in the main cylinder exceeds 0.8 kg/cm2, the explosion door opens automatically.
In addition, the equipment electrical parts should have explosion-proof measures, explosion-proof fans, observation lights explosion-proof. In addition, safety grounding and other installation requirements are emphasized in the instruction manuals and electrical installations, which are related to the total grounding facilities of the equipment manufacturer.
Explosion-proof granulation coating machine with the above structure has been introduced to the market. The equipment has granulation, coating, drying function and explosion-proof performance. It is suitable for powder, granules, and powders of Chinese and western medicine, food, chemical industry and other industries. The surface coating of the pills is coated.
4. Summary
The above discussion on the two problems associated with static electricity and dust explosion in powder boiling has reaffirmed the importance of explosion-proof safety for boiling drying equipment.
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