Technical requirements for explosion-proof solvent recovery dryerDesign principles of granulator

This medicine has the characteristics of flammability and explosiveness, so the design of the granulator should strictly follow the relevant standards of the country or relevant institutions. The design and selection of standard equipment (accessories), power configuration, automatic control, and components should fully comply with the requirements of hazardous areas, meeting the requirements of the following indicators:

General Requirements for Explosion proof Electrical Equipment for Explosive Environments GB3836.1-2000

Explosion proof Electrical Equipment for Explosive Environments - Explosion proof Electrical Equipment'd 'GB3836.2-2000

Explosion proof Electrical Equipment for Explosive Environments - Intrinsically Safe Circuits and Electrical Equipment '1' GB3836.4-2000.

Technical requirements for explosion-proof solvent recovery dryerTechnical requirements for granulator

1The feeding amount for each batch is 110 kg. (Note: The false density of the finished drug is 0.30 g/cm3 to 0.40 g/cm3).

2.The base material accounts for about 23% of the finished product, approximately 25kg. The diameter of the bottom of the hopper should be minimized as much as possible without affecting the boiling state, not exceeding 550mm. The height of the hopper should be increased to ensure the slope of the hopper wall (as small as possible), ensure the flow of powder, and reduce wall sticking.

3The control cabinet must be isolated from the granulation site (with the operating part set up in another room), designed with PLC and operated with a color touch screen. There should be two operating programs, automatic and manual, both of which can adjust and set parameters. The transition between manual and automatic should be convenient, and the parameters at the transition time point should be used as the basis for the transition (if the equipment fails while running in automatic mode, it can be directly switched to the automatic operation state when the fault occurs after the fault is resolved). The signals between devices of the same model should not interfere with each other, and the signals should be effective within a range of 100m. Attenuation should not be displayed on the monitor.

4Each device uses a separate control cabinet and display. The control cabinets are placed side by side in the same room, and their signals cannot interfere with each other.

5The flow rate of the infusion pump can be adjusted (different flow rates can be set in the control panel), and the flow rate should be * during the infusion process, with a flow fluctuation range of no more than 5%. The pump body and pipeline can withstand high temperature nitrate corrosion. It should be explosion-proof type. Control the flow rate range from 50ml/min to 1000ml/min

6The heating adopts the form of electric heating, which can be grouped for heating. The surface temperature of the electric heating is not greater than 290 ℃, and it can be controlled and alarmed to stop heating. When there is no air flow, the electric heating must be stopped. The inlet air temperature can be adjusted, with a temperature control range of 85 ℃ to 100 ℃, and the temperature can automatically stabilize at ± 3 ℃ after being set at a certain point. The dust cover of the heater is easy to disassemble and clean, and can effectively prevent dust from entering the heater.

7The air volume control requires the use of variable frequency control and can be controlled and adjusted on the control panel.

8The inner surface of the observation mirror hole should be kept close to the inner surface of the cylinder to prevent material accumulation during the granulation process.

9The equipment connection should be kept on a close plane to the inner surface of the cylinder to prevent material accumulation during the granulation process.

10The entire device should be equipped with anti-static measures, with no dead corners for anti-static, and there should be jumper wires at the pipeline connections.

11Equipped with a television monitoring device, it can display various process parameters (exhaust temperature, intake temperature, material temperature, pulse dust removal time, infusion frequency and fan frequency, atomization pressure, etc.) on the control panel, which can be displayed, adjusted and set. It can also automatically record, print and save all operation data (data or parameter curves every 10 minutes) of each shift in the computer for easy access and query at any time.

12The exhaust outlet should be equipped with secondary dust removal facilities, using a water foam dust collector. The operation of the water foam dust collector should not affect the air volume, wind speed, and temperature of the granulator. Water film dust removal can automatically replenish water.

13The air duct connection adopts a quick opening connection, which is easy to disassemble and maintain.

14The overall equipment is made of SUS304 stainless steel, and the part of the cylinder that comes into contact with the drug is polished with a mirror finish, without burrs or uneven welding points. The thickness of the cylinder wall shall not be less than 2mm.

15The upper part of the equipment is designed with two side vent holes (at least one vent hole should be installed facing the explosion-proof window of the workshop, and not facing the direction of the workshop door), and the pressure resistance strength of the explosion-proof membrane should not exceed 0.2Mpa.

16The equipment should have a super temperature and positive pressure alarm device, and be able to quickly and automatically lower the top cylinder when positive pressure is formed (when the explosion-proof diaphragm ruptures). It should have an emergency stop button.

17Install a vibration damper on the equipment barrel wall, which can adjust the vibration frequency according to process requirements during operation, effectively eliminating wall sticking phenomenon.

18Each device is equipped with a discharge trolley.

19Slurry: Powder (carrier)=10:1. Minimize the granulation and drying time as much as possible, and generally not exceed 8 hours. And the moisture content is ≤ 0.1%.

20The selection of the capture bag should ensure that there is no material leakage, and it should be as dense as possible (above 800 mesh) without affecting the air flow. It should be able to effectively intercept 10 µ m dust. Easy to disassemble, replace, and clean.

Our company strives for survival through quality and development through service. We always adhere to the principles of honoring contracts, keeping promises, high quality, and good after-sales service. Our equipment is of high quality and affordable. We welcome new and old customers to come and purchase from our factory!