CN201731731U

CN201731731U - Industrial drying oven

Info

Publication number: CN201731731U
Application number: CN2009201475144U
Authority: CN
Inventors: 苏茂胜
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-29
Filing date: 2009-03-29
Publication date: 2011-02-02
Anticipated expiration: 2019-03-29

Abstract

The utility model discloses an industrial drying oven, which comprises oven outer heat receiver, an oven inner heat receiver, an oven inner radiator, a throttle valve, two valves which are connected with a compressor unit through pipelines to connect into a closed system, proper refrigerant is filled in the system. When the oven outer heat receiver, the oven inner radiator, the throttle valve, the valves and the compressor unit are connected, a hot pump system is formed. The hot pump system absorbs heat energy from a low-grade heat source to transmit to high-grade heat source at work, and water or solvents in materials are evaporated into recycle gas in the oven through heating the materials in a drying oven. The relative humidity of gas in the oven continuously rises along with continuous evaporation, when the relative humidity of gas in the oven achieves a setting value, the oven inner heat receiver, the oven inner radiator and the compressor unit are connected into a dehumidification system through switching the valves. Water or solvents of high humidity gas in the oven is precipitated and discharged outside the oven in cycles, thereby completing the purpose of drying.

Description

A kind of industrially drying case

Affiliated technical field

This invention relates to a kind of industrial drying box device, and its use Non Conventional Energy Sources is converted into high-grade heat energy with low grade heat energy and is used for heating, simultaneously in conjunction with the low temperature dewatering technology, is used for the dry materials under the normal temperature condition.

Background technology

At present, known industrial drying box is to use traditional electric energy to be converted into high-grade heat energy or uses fuel gas, oil product to produce high-grade heat energy by burning, heating thing liquid or the solvent heating and gasifying that thing comprises that will be dried that be dried evaporates in the air in case.Gas evaporation in the case behind a large amount of steam or the solvent relative humidity raise, the gas that the relative humidity in the case is big is discharged, and sucks the gas of low temperature and low humidity degree, constantly repeats above process, the moisture of discharging in the material reaches drying purpose.

In above-mentioned dry technology mode, if there is not hydrofuge, then moisture or the solvent that gas relative humidity reaches in the 100% back material in the case just can't have been discharged, and therefore takes away a large amount of heats in the process of hydrofuge.Can only reach 30-50% so traditional method is used for its thermal efficiency of drying of drying box, waste a large amount of energy, simultaneously a large amount of hot gas be entered atmosphere.Adopt combustibles such as combustible gas, oil product and coal to obtain high-grade heat energy and also can produce the living environment that poisonous, harmful gas such as carbon monoxide, carbon dioxide and residue of combustion pollute us by burning.Material contains the benzene class if be dried, alcohols material directly enters atmosphere by hydrofuge with it, has not only wasted resource but also contaminated environment.

Summary of the invention

This invention provides a kind of new drying equipment, and it is converted into high-grade heat energy as the drying box thermal source with low grade heat energy, and it is lower to have overcome traditional drying method energy utilization rate, has problem of environment pollution caused in the dry run.Make material dewatering in conjunction with the low temperature dewatering technology, in an airtight relatively casing, finish drying.

This invention utilizes the principle of Carnot cycle will be present in the thermal source that low-grade heat energy such as occurring in nature air energy, waste heat are converted into drying box, utilizes identical principle that heat is all absorbed in the low temperature dewatering process and returns in the case.The heat of its needed electric energy and generation can reach more than 1: 3 in driving carnot's cycle process, promptly can drive Carnot cycle with the electric energy of 1kW and produce the above heat of 3KW, all heats that dry run produces all are used for heating the thing that is dried, a spot of heat energy is arranged by the surface radiating of drying box except the same, almost leak without any heat with traditional drying box.

The technical scheme that this invention adopts is: be provided with a heat exchanger at low-grade heat source and be used for absorbing low grade heat energy, two heat exchangers also are set respectively in the circulation air flue in drying box, one is used for discharging heat energy, one is used for absorbing heat energy, by compressor bank with distribute valve and pipeline is full of an amount of refrigerant that is in the gas-liquid coexistence in they are coupled together.Compressor bank is drawn the cold media gas in the heat exchanger that places on the low-grade heat source during work, this moment is because the refrigerant pressure reduction in the heat exchanger on the low-grade heat source, the liquid refrigerants boiling point reduces, absorb low grade heat energy and flash to gas, become the HTHP refrigerant after the compressed unit compression, finish heat exchange by placing the heat exchanger in the case, finish the liquefaction that to be condensed when high pressure refrigerant gas temperature after the sufficient heat exchange is reduced to condensation temperature under the corresponding pressure, then the high-pressure liquefaction refrigerant is ejected into the heat exchanger that is positioned at low-grade heat source again by restricting element, the refrigerant vaporization of in environment under low pressure, expanding, absorb heat by interchanger to low-grade heat source again, again drawn by compressor, this moment, system constituted a heat pump, and the heat exchanging process of finishing as above to be chatted is converted into high-grade heat energy with low grade heat energy.After the temperature in the case reached the temperature of setting, compressor stopped, and transfer heat in case is not in temperature constant state in the case.After the gas relative humidity in the case reaches the relative humidity requirement of setting, conversion by distributing valve with choke valve be positioned at the interchanger that the case air flue is used to absorb heat and be connected, constitute a dehumidification system this moment again, with moisture in the hot and humid gas or removal of solvents.

The beneficial effects of the utility model are: effective energy savings does not have hot and humid gas simultaneously again and discharges and influence environment in the process of drying.Material contains the benzene class if be dried, alcohols material can also reclaim relative raw material, not only economizes on resources but also protected environment.

Description of drawings

Below in conjunction with drawings and Examples this invention is further specified.

Fig. 1 is the schematic diagram of this invention.

Fig. 2 is the structure chart that this invention is applied to the fruit drying box.

Fig. 3 is the side view of Fig. 2.

1. casees outer heat dumps among the figure, 2 casees interior heat dumps, 3 casees inner radiators, 4 casees interior circulating fans, 5 casings, 6 compressor bank, 7 electric throttling valves, 8 electromagnetic valves, one, 9 electromagnetic valve, two, 10 air inlets, 11 air outlets, 12 discharge outlet.

The specific embodiment

Heat dump (1) is connected with compressor bank (6) air entry outside accompanying drawing illustrated embodiment raising middle flask, the compressor bank gas outlet is connected with an end of case inner radiator (3), the other end of case inner radiator (3) is through electric throttle valve (7), after be divided into two branch roads, one the tunnel is connected with the other end of heat dump outside the case behind electromagnetic valve two (9), another road is connected with heat dump (2) in the case behind electromagnetic valve one (8), the other end of heat dump (2) also is connected with compressor bank (6) air entry in the case, constitute a closed circulation system by pipeline, an amount of refrigerant of perfusion in system.

Magnetic valve one (8) cuts out during work, and magnetic valve two (9), electric throttle valve (7) are opened, and constitutes a hot mercury system.

The refrigerant of the outer heat dump of case is compressed unit extraction refrigerant pressure step-down and is vaporized, cold media gas absorbs outside low grade heat energy, become the HTHP cold media gas after the compression of compressed unit, the high temperature and high pressure gas that compressor bank produces through pipeline deliver to the case inner radiator (3) that is loaded in the insulation casing with heat energy and case in air finish heat exchange.Become liquid gradually after finishing the high temperature and high pressure gas heat release after the heat exchange, high pressure refrigerant liquid sprays refrigerant liquid by heat dump (1) outside the case that is in low-pressure state of electromagnetic valve two (9) outside being positioned at case again after pipeline is delivered to electric throttle valve (7) throttling, after the low grade heat energy of cooling medium liquid bulk absorption outside is vaporized again, go round and begin again, heat just is sent in the drying box endlessly.Suitable adjusting electric throttle valve makes outdoor heat dump keep certain low pressure, make the evaporating temperature of refrigerant be lower than the temperature of outdoor low grade heat energy, make simultaneously by the cold media gas pressure after the compressor compression enough high again, make the temperature of compression back gas be higher than the temperature that requires drying in the case as much as possible, this thermal cycle just can continually go on, and just quits work up to the temperature that reaches the casing setting.After this owing to making the temperature inside the box descend to then going again, be dried in the case thing heat absorption and casing heat radiation start above-mentioned circulation.

Electromagnetic valve two (9) is closed when the relative humidity in the case reaches certain setting humidity, and electromagnetic valve one (8) is opened, and outdoor heater is cut off, and the interior heat dump (2) of case that is loaded in the case is access in, and constitutes a dehumidification system at this moment.Compressor bank (6) extracts the refrigerant of heat dump (2) in the case, heat dump (2) replaces the heat that the outer heat dump of case absorbs hot and humid gas in its surperficial case of flowing through in the case, and the condensate moisture dewfall in the case of flowing through in the gas cooling back gas on heat dump (2) surface is separated.Become the HTHP cold media gas after the compression, through case inner radiator (3) with heat and case in air finish heat exchange, again send into heat in the case, become liquid gradually after finishing the high pressure-temperature gas heat release after the heat exchange, high pressure refrigerant liquid is spraying refrigerant liquid by electromagnetic valve one (8) to the case heat dump (2) that is in low-pressure state that is positioned at case after pipeline is delivered to choke valve (7) throttling, after the heat energy of hot and humid gas is vaporized again in the cooling medium liquid bulk absorption case, go round and begin again, heat just can keep as much as possible in the drying box.Simultaneously since compressor bank in the process of work because frictional heating can be converted into heat energy with part mechanical energy, the thermal loss that can compensation tank surface heat radiation to a certain degree causes.Suitably regulate electric throttle valve by electric control system and make that heat dump keeps certain low pressure to make the evaporating temperature of refrigerant low as far as possible in the case, enough high by the cold media gas pressure after the compressor compression, make the temperature of compression back cold media gas be higher than the baking temperature that requires in the case as much as possible, this thermal cycle is continual the going on of energy just, and this moment, system was in except that wet condition.Hot and humid gas in the case during through indoor heat dump its heat energy be absorbed, condensation appears in the gas temperature reduction, moisture in the gas is separated out, from the discharge outlet that is positioned at the heat dump bottom water is got rid of, gas is finished heat exchange through the case inner radiator again and is heated up again and send in the case for the low humid gas of high temperature.Move in circles when gas relative humidity is lower than certain setting numerical value in case, stop dehumidifying.

That reaches the startup setting earlier temperature and humidity in this backsight case, by the electrical apparatus control system decision system is switched to hot mercury system or dehumidification system.

Claims

1. industrially drying case, a heat dump is set in the outside low-grade heat source of case, a heat dump and a radiator are set in the inside of casing, connect into an airtight system by pipeline and valve and compressor bank, in system, poured into an amount of refrigerant, it is characterized in that: respectively had a heat dump to be connected with compressor bank, case inner radiator by the switching of valve the inside and outside of drying box.

2. industrially drying case according to claim 1, it is characterized in that: when heat dump outside the case is connected with compressor bank, case inner radiator by valve, constitute a heat pump, when heat dump, case inner radiator are connected with compressor bank by valve in the case, constitute a dehumidification system.

3. industrially drying case according to claim 1 is characterized in that: heat dump, case inner radiator all are on the air flue of gas circulation in the case in the case.