Nanjing Tianli Pharmaceutical Equipment Co., Ltd. is located in the beautiful eastern suburb of Nanjing, the ancient capital of the Six Dynasties. The company's existing area of ​​26,000 square meters, plant area of ​​10,000 square meters, is a large-scale production of pharmaceutical equipment, chemical equipment, food equipment in Nanjing, (hot air circulation oven, vacuum drying oven, vacuum oven); its brand products are: DMH series dry heat Bacteria oven (100 grade, 10,000 grade); ZTH series rubber stopper sterilization (100,000 grade) rotary oven; HDB, HDA (100,000 grade) tunnel sterilization oven; ZDF/YZG series high, medium, Low temperature vacuum oven; SZG series double cone rotary vacuum dryer; CT-C series hot air circulation oven; DW series belt dryer; LPG series spray dryer; HG series large electric blast dryer; FB type explosion-proof oven; Low temperature ozone sterilization oven; ZLG vibrating fluidized bed dryer; BG type high efficiency coating machine; CBX type ultrasonic bottle washer; CSQ type ultrasonic rubber plug cleaning machine; ZJP type drum type rubber plug cleaning machine; XG type washing Medicine machine; VH type high efficiency mixer; SYH type three-dimensional motion mixer; EYH type two-dimensional motion mixer; WHJ type double cone rotary mixer; CH type groove type mixer; FB type mixing machine; CY type barrel type Medicine machine; ZG type eye drops filling machine; RF Eye drops bottle sealing machine; 30B high efficiency pulverizer; ZGF type Chinese herbal medicine pulverizer; XZS type oscillating sieve; FZS type vibrating screen; FK type tilting reaction pot; various stainless steel storage tanks; LK (P) series active cold storage; Standard equipment, etc., products are sold throughout the country and Eastern Europe.
Scope of convection heat transfer drying equipment
In the existing drying equipment, the zui is convective heat transfer drying. If hot air is dried, hot air is brought into contact with the material to be heat exchanged to evaporate water. Typical types of convection dryers are air suspension dryers, such as fluidized bed dryers, flash dryers, airflow dryers, spray dryers, ventilation dryers, flow dryers, gas rotary dryers, and agitation drying. Machine, parallel flow dryer, rotary dryer, etc.
In practical applications, there are single machines, combined machines, and deformed models. The airflow dryer, the fluidized bed dryer, the spray dryer, etc. all use hot air as the heat carrier, and the material is also transferred while drying. This type of dryer is primarily characterized by the absence of transmission components.
Dry powder, granules, flakes, the usual way is to apply hot air or gas flow on the surface of the particles. The passing air stream transfers heat to the material to evaporate the water. The vaporized water vapor is taken directly into the air and is exposed to air, inert gas, direct combustion gas or superheated steam commonly used in drying systems.
The method allows hot air to be in direct contact with the material and removes moisture while heating. The key is to increase the contact area between the material and the hot air to prevent the hot air from drifting. The temperature of the material during constant-speed drying is almost the same as the temperature of the wet bulb of hot air, so the heat-sensitive material can also be dried using high-temperature hot air. This drying method has a high drying rate and low equipment investment, but the thermal efficiency is low. The following are the basic conditions of various convection drying equipment.
(1) Box dryer
It is one of the old dryers of Zui. The material is packed in a tray, and the tray is placed on the carriage to be discharged layer by layer. Steam or electricity is used as a heat source, and the hot air in the tank can be circulated and partially discharged to make the drying more uniform. Although the thermal efficiency is low, it is still used in a large amount, and it is still being manufactured. The reason is that the structure is simple, the operation is not always taken care of, and there is no obvious problem. However, many materials must be turned over and turned over during drying. Heat sensitive materials are often discolored and are not suitable for drying with solvent materials. Due to the accumulation of materials, the inner layer has heat transfer and poor mass transfer, so the drying rate is low.
(2) Tunnel type drying room
The trays are placed on special trolleys, which can be intermittently moved in and out of the tunnel to increase production and improve thermal efficiency. The other structure is similar to a box dryer.
(3) mesh belt dryer
Can be used to dry corn, cereals, vegetables, etc. This machine is equipped with a stainless steel wire mesh transmission belt, which can be heated in sections. The device has a unit length of 1.8 to 2 m per segment, and the length of the Zui can be connected to 40 m, and the processing capacity per hour can be as high as 4 t. The constant temperature drying air temperature can reach 130 ° C, and the exhaust relative humidity can reach 85%.
(4) Multi-layer turbine dryer
The structure is a vertical cylinder with several layers of turntables, and the material can be added from the top and dropped to the bottom layer by layer. The hot air is introduced from the bottom, and the air is circulated by several blast turbine impellers arranged in the center of the cylinder, and a heater is arranged at the corresponding height of the inner wall of the cylinder to supplement the heat of the air, thereby improving the thermal efficiency and the drying rate. However, the equipment is not easy to clean, and it is difficult to produce a variety of materials and require clean materials.
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