BLGZ series closed-loop drying and cooling machine

BLGZ series closed-circuit drying and cooling machine

4. Drying of large particles, small pieces, and materials with lower viscosity

Working principle

Using nitrogen as the conductive heat transfer medium, it realizes the drying production and recovery of organic solvents and solvent materials in the fields of pharmaceuticals, biochemistry, chemical engineering, biology, etc., with practicality of safe production, high efficiency, low consumption, energy saving and emission reduction.

The gas inside the dryer is circulated by the fan (both for induced draft and supply air), heated by the heat exchanger, filtered by the high-efficiency filter, and enters the boiling heating and drying material. The hot air passes through the material while being continuously stirred by the internal stirring mechanism to fully contact and exchange heat with the hot air. After the solvent (alcohol, acetone, methanol, etc.) in the material evaporates, the fine powder material carried in the gas is driven by the circulating gas and then blown back into the dust collector with nitrogen to capture the dust material carried in the gas. The waste heat gas is filtered through the filter and enters the condenser, where it is cooled by the condenser cooling medium and condensed to the dew point and separated from the gas, achieving the recovery of organic solvents. The separated gas is then fed into the heater by a fan, and this cycle repeats itself. Until all solvents are evaporated, separated, and condensed from the material.

After drying, the material is cooled and discharged from the bottom. The mesh plate used to hold the material is a movable flap controlled by a cylinder. After the material discharge is completed, a fan can be used to clean and filter the filter in the drying room.

Characteristics and advantages of the equipment

According to customer needs, vacuum feeding and discharging can be equipped to improve integrated intelligent operation.

Based on the explosive and flammable safety hazards of organic solvents, this unit system adopts online oxygen measurement, overpressure relief, explosion prevention, and other safety technology measures. Through intelligent control technology, the monitoring of residual oxygen in the system, pressure balance monitoring, and automatic adjustment control are achieved. When the air (oxygen) content in the system exceeds 0.5% (v/v), the oxygen measuring device will command the nitrogen replenishment valve to open through the control system, replenishing fresh nitrogen into the system to restore the residual oxygen level to the safe set value range (the closed-loop system is designed for positive pressure, and oxygen enters the circulation system through the feeding process). When the pressure value in the system exceeds the set value (the pressure balance value of the circulation system is set to 0.02mPa), the pressure relief device will automatically open the pressure relief pneumatic valve through the intelligent control center command to eliminate the overpressure gas. The explosion-proof explosion relief device is another safety technical measure adopted by this unit, which means that if there is a fault in the electrical or critical parts of the system, the normal operation of the system will fail, and the pressure will rise to the safety limit value (the designed pressure resistance value of the system is less than or equal to 0.05Mpa), the explosion-proof explosion relief device will automatically open the directional explosion and automatically cut off the power supply, close the inlet and outlet pipeline valves, ensure that the solvent does not have the possibility of reacting with oxygen, effectively avoiding fire or explosion accidents in the production process of the equipment, and avoiding personnel to the greatest extent possible. Casualty and property damage, ensuring production safety

The equipment is a fully enclosed system, where the heat medium is blown upwards through a mesh plate to enhance the contact between the material and the heat and mass transfer process. It can achieve a high gas moisture content at a small air volume, so only a slight positive pressure is required during operation. The air volume is small, and the fan power of the equipment is reduced, resulting in less noise. At the same time, the hot and humid gases containing solvents after drying can be separated by a condenser, and the recovered solvents can be reused. At the same time, the low dew point nitrogen enters the heater through a circulating fan for reheating and recycling. Compared with conventional drying equipment, the thermal efficiency is improved, and the power consumption is significantly reduced, thus saving energy loss and production costs of the equipment.

This unit realizes the recycling and utilization of solvent containing materials in the drying production process. On the basis of solving the difficulties in drying and heavy pollution caused by exhaust gas emissions in related industries, it achieves solvent recycling and utilization while achieving zero emissions, avoiding environmental pollution caused by exhaust gas and achieving practical energy-saving and emission reduction effects.

Technical Parameter

Model number				60	120	150	200	300	400	500
Project Item			Unit Unit
Raw material container Container of raw material		Diameter Dia	Mm	Φ900	Φ1000	Φ1100	Φ1400	Φ1600	Φ1800	Φ2000
production capacity Production capacity		Xiao Min	kg/batch	40	70	90	120	150	255	355
		Big Max	kg/batch	65	135	170	250	355	480	580
Steam consumption			kg/batch	130	210	240	280	360	500	600
Nitrogen consumption			m3/min	0.6	0.6	0.9	0.9	1.1	1.6	2.0
Wind turbine power of fan			kw	11	18.5	22	30	37	45	55
Solvent recovery percentage			%	≥95
Temperature			℃	Adjust the temperature from room temperature to 140 ℃ according to the characteristics of the material (room temperature to 140 ℃, Adjustable according to material features）
Material yield Product ratio			%	>99
Final moisture content			%	~0.2
Noise			db(A)	≤75
Overall dimensions (LxW)			mm	6852X3740	7266X3803	7340X3910	7550X4330	8420X4620	9870X5520	10600X5600
Height Height	H1		mm	4800	5500	5750	5750	6540	6540	6600
	H2		mm	4000	4100	4200	4420	4620	4700	5050

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