CN2529175Y

CN2529175Y - Heat pump grain dryer

Info

Publication number: CN2529175Y
Application number: CN 02210718
Authority: CN
Inventors: 张歌今
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-19
Filing date: 2002-03-19
Publication date: 2003-01-01
Anticipated expiration: 2012-03-19

Abstract

The utility model provides a heat pump grain drying machine. The technical problem to be solved by the utility model is that the prior drying equipment is not beneficial for keeping the quality of the grain with high operation expense. The utility model provides a heat pump grain drying machine with high-efficiency, energy-saving and without damaging the nutritive value; the utility model is provided with a frame which is provided with a body; the lower part of the body is provided with a cooling section; the upper part of the body is a drying section. The utility model is characterized in that the drying section is provided with a plurality of hot water pipe groups which are communicated with one another; the cooling section is provided with a plurality of cold water groups which are communicated with one another; a heating device is a heat pump; the hot water pipe in the drying section is communicated with a heat release and exchange device of the heat pump; the inlet end of the cold water pipe in the cooling section is communicated with a pipeline which distills the ground water; the outlet end of the cold water pipe in the cooling section is communicated with a heat adsorption and exchange device of the heat pump by the pipeline. The utility model has the advantages of low drying temperature, no damages to the nutritive value of the grains, matching the heat pump with the drying device, high-efficiency, energy-saving and reducing the operation cost of the equipment.

Description

The heat-pump-type grain drier

Technical field

The utility model belongs to a kind of drying plant, particularly a kind of heat-pump-type 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 is lower, and the day-to-day operation expense height of drying machine.

Summary of the invention

The technical problems to be solved in the utility model is, overcomes quality and the high problem of operating cost that existing drying equipment is unfavorable for keeping grain, and a kind of efficient, energy-conservation, heat-pump-type 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, heater is a heat pump, the dryer section hot-water line is connected with the heat release heat exchanger of heat pump by pipeline, the arrival end of cooling section cold water pipe is connected with the phreatic pipeline of extraction, and the port of export of cooling section cold water pipe is connected with the heat absorption heat exchanger of heat pump by pipeline.

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, match with heat pump and drying device, the heat energy in the underground water is taken out, be the drying device heat supply,, thereby reduced the operating cost of equipment because heat pump has efficiently, energy-saving advantages; And the utility model is introduced underground water in the cold water pipe of cooling section earlier, in to the grain cooling, has absorbed heat energy wherein again, and phreatic water temperature is increased, for heat pump provides more thermal energy, thus the thermal efficiency of drying device of having carried further height.

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 14, and the welding of frame 14 usefulness shaped steel is made; On frame 14 body is housed, the bottom of body is a cooling section 8, 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 3 that catchments is housed all, described every group of hot-water line 4 is end to end, and links together with tube connector 2; The some groups of cold water pipes that are interconnected 9 are arranged in cooling section 8, and cold water pipe 9 adopts two groups, also can in the end of two groups of cold water pipes 9 flange 3 that catchments be housed also, and link together with tube connector 2 with many groups; Heater is a water resource heat pump 12, one cover duplex matter system is arranged in heat pump 12, duplex matter system mainly is made up of compressor, pressure-reducing valve, evaporimeter and condenser, evaporimeter in the duplex matter system is included in the heat absorption heat exchanger, utilize the heat energy in the cycle fluid absorption water, condenser is included in the heat release heat exchanger, is discharged into the heat energy in the cycle fluid in the water again; Dryer section hot-water line 4 is connected with the heat release heat exchanger of heat pump 12 by pipeline 1 and pipeline 6, and promptly pipeline 1 is connected with the port of export with the arrival end of heat release heat exchanger respectively with pipeline 6, constitutes a complete closed circuit; Water pump 7 also is housed on pipeline 6, the water in the closed circuit is flowed; The arrival end of cooling section cold water pipe 9 is connected with the phreatic pipeline 10 of extraction, and immersible pump 16 is equipped with in the end of pipeline 10, and immersible pump 16 is arranged in well, the water in the last well is transported in the cold water pipe 9 of cooling section 8, and dried grain is cooled off; The port of export of cooling section cold water pipe 9 is connected by the arrival end of pipeline 11 with the heat absorption heat exchanger of heat pump 12, the heat absorption heat exchanger the port of export be connected to pipeline 15, pipeline 15 extend in the back water well, thereby recharges the underground water after the heat exchange underground again; In the bottom of cooling section 8 discharger 13 is housed also, utilizes the speed of discharger 13 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; And the water in the hot-water line 4 enters into the heat release heat exchanger of heat pump 12 after carrying out heat exchange with grain, behind the heat energy of cycle fluid, enters into hot-water line 4 again and carries out heat exchange with grain in the absorptive condenser; After grain arrived in the cooling section 8, heat energy was wherein absorbed by the cold water in the cold water pipe 9 gradually, reach the temperature of setting after, from discharger 13, discharge; And underground water can absorb the heat energy in the grain when flowing through from cold water pipe 9, and the temperature of water will be improved, like this, in the heat absorption heat exchanger with evaporimeter in cycle fluid when carrying out heat exchange, just can emit more thermal energy, thereby realize the recycling of heat energy, improve the thermal efficiency of system.

Claims

1, a kind of heat-pump-type grain drier, it has a frame, body is housed on frame, the bottom of body is a cooling section, the top of body is dryer section, it is characterized in that, 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, heater is a heat pump, the dryer section hot-water line is connected with the heat release heat exchanger of heat pump by pipeline, and the arrival end of cooling section cold water pipe is connected with the phreatic pipeline of extraction, and the port of export of cooling section cold water pipe is connected with the heat absorption heat exchanger of heat pump by pipeline.