The thermal cycle grain drier
Technical field
The utility model belongs to a kind of drying plant, particularly a kind of thermal cycle grain drier.
Background technology
Cereals drying equipment of the prior art mainly contains three kinds, drying tower, fluidized bed drying equipment and belt drying machine.Wherein, drying tower is most widely used.Drying tower as thermal source, belongs to convective drying with hot blast, and this also is a drying mode the most commonly used.Different according to air-flow with flowing to of material, can be divided into concurrent drying, counter-current drying or mixed flow drying.
The CHGT series tower-type grain drier that Jiangsu Zheng Chang group produces is exactly a kind of following current Cereals drying equipment.It adopts the building block system metal structure, mainly is made of one-level dryer section, delay section, secondary drying section and cooling section.The I and II dryer section is connected with hot air boiler respectively by pipeline, and hot blast temperature is 110~140 ℃, and cooling section is connected with blower fan by pipeline.Cereal relies between the parting bead of gravity in drying tower and moves down, and directly carries out heat exchange with hot blast, and the moisture in the cereal is then discharged by the shutter of tower body side.The problem that this drying machine exists is: 1, the temperature of hot blast is too high, quality to grain has adverse influence, because the temperature of grain heat-drying should be below 80 ℃, in case above 80 ℃, protein in the grain, fat all can be subjected to destruction to a certain degree, thereby reduce the nutritive value of grain.2, use hot blast as heat transfer medium, therefore, the energy that expends is many, and hot blast and grain carry out promptly discharging from drying machine after the heat exchange, can't recycle, so the thermal efficiency of drying machine is lower.3, also than higher, investment cost is big for the price of hot air boiler, and therefore, this equipment is only applicable to national large-scale grain storehouse usually, is not suitable for general grain processing enterprise and uses.
Summary of the invention
The technical problems to be solved in the utility model is, overcome existing drying equipment and be unfavorable for keeping problems such as the quality of grain, the thermal efficiency are low, investment cost height, its structure is simplified, reduce equipment manufacturing cost, a kind of efficient, energy-conservation, thermal cycle grain drier of not destroying the grain nutritive value is provided.
The utility model has a frame, body is housed on frame, the bottom of body is a cooling section, the top of body is dryer section, its special character is, the some groups of hot-water lines that are interconnected are arranged in dryer section, the some groups of cold water pipes that are interconnected are arranged in cooling section, the entrance point of dryer section hot-water line is connected with heater by pipeline, the port of export of dryer section hot-water line is connected by the entrance point of pipeline with the cooling section cold water pipe, the port of export of cooling section cold water pipe is connected with heater by pipeline and water pump, constitutes a complete closed circuit.
Advantage of the present utility model is:
1, water is as heat transfer medium, and the maximum temperature of water is controlled at below 80 ℃, thereby, can not destroy the quality of grain itself, can make it remain on best nutritional status.
2, the port of export of dryer section hot-water line and the entrance point of cooling section cold water pipe are coupled together, like this, in dryer section, hot water is to the grain heat drying, and the heat energy in the water is absorbed by grain, and is cooled into gradually and is cold water; At cooling section, this cold water is introduced in the cold water pipe of cooling section, in to the grain cooling, absorbed heat energy wherein again, heat energy in the grain is absorbed by water again, then, enters into heater again and goes, circulation by water, realized the recycling of heat energy, therefore, in whole dry run, the loss of heat energy seldom, thereby improved the thermal efficiency of drying device.
3, the utility model substitutes hot air boiler with the common heating device, on the one hand the structure of drying device is simplified, and has also reduced the total cost of equipment on the other hand, and is suitable for various grain processing enterprises uses.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A cutaway view of Fig. 1.
The specific embodiment
As shown in drawings, the utility model has a frame 12, and the welding of frame 12 usefulness shaped steel is made; On frame 12 body is housed, the bottom of body is a cooling section 9, and the top of body is dryer section 5; The some groups of hot-water lines that are interconnected 4 are arranged in dryer section 5, in the end of every group of hot-water line 4 flange 2 that catchments is housed all, every group of hot-water line 4 is end to end, and links together with tube connector 3; The some groups of cold water pipes that are interconnected 6 are arranged in cooling section 9, and cold water pipe 6 adopts two groups, also can in the end of two groups of cold water pipes 6 flange 2 that catchments be housed also, and link together with tube connector 3 with many groups; The entrance point of dryer section hot-water line 4 is connected with heater 11 by pipeline 7, and described heater 11 is electric heater units, and heater 11 also can be the heater of other types, as water resource heat pump, water heater or the like; The port of export of dryer section hot-water line 4 is connected by the entrance point of pipeline 1 with cooling section cold water pipe 6, and the port of export of cooling section cold water pipe 6 is connected with heater 11 by pipeline 8 and water pump 13, constitutes a complete closed circuit; In the bottom of cooling section 9 discharger 10 is housed also, utilizes the speed of discharger 10 control dischargings.
When dry, grain adds from the top of dryer section 5, and progressively moves down, and in dryer section 5, grain absorbs the heat energy of hot water in the hot-water line 4, and the past more temperature of going down is high more, and discharges moisture; After arriving in the cooling section 9, the heat energy in the grain is absorbed by the cold water in the cold water pipe 6 gradually, after grain reaches the temperature of setting, discharges from discharger 10; The cold water that has absorbed heat energy then is introduced in the heater 11 again, thereby realizes the recycling of heat energy.