CN105021015A - Superhigh-temperature heat pump drying system - Google Patents

Superhigh-temperature heat pump drying system Download PDF

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Publication number
CN105021015A
CN105021015A CN201510433292.2A CN201510433292A CN105021015A CN 105021015 A CN105021015 A CN 105021015A CN 201510433292 A CN201510433292 A CN 201510433292A CN 105021015 A CN105021015 A CN 105021015A
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China
Prior art keywords
air
temperature
duct
heat pump
heat
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Pending
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CN201510433292.2A
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Chinese (zh)
Inventor
史文芬
陈溪
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Hefei Taoneng Environment Technology Co Ltd
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Hefei Taoneng Environment Technology Co Ltd
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Priority to CN201510433292.2A priority Critical patent/CN105021015A/en
Publication of CN105021015A publication Critical patent/CN105021015A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention relates to a superhigh-temperature heat pump drying system. The superhigh-temperature heat pump drying system comprises a drying room, an air return duct, a circulating draught fan, an exhaust duct, an exhaust fan, an air heat recovering device and at least two heat pump units. The air return duct is communicated with an air supply port and an air return port of the drying room. The circulating draught fan is arranged in the air return duct. The exhaust duct is communicated with the air return duct. The exhaust fan is arranged at a duct opening of the exhaust duct. The air heat recovering device is arranged at the intersection of the air return duct and the exhaust duct. The heat pump units are used in parallel. According to the superhigh-temperature heat pump drying system, the two or more heat pump units work in parallel, and the drying room is heated by absorbing low-grade ambient air heat at the initial stage of the drying process, so that the temperature is increased; after the temperature is increased to a certain extent, high-temperature and high-humidity air exhausted out of the drying room is dehumidified, and sensible heat and latent heat contained in the high-temperature and high-humidity air are recovered to the maximum extent; due to the gradient difference of the temperature ranges of cycle working fluid of the heat pump units, relatively higher air supply temperature can be provided through the system, and meanwhile it is guaranteed that the evaporating temperature of the drying units is sufficiently increased.

Description

A kind of superhigh temperature heat pump drying system
Technical field
The present invention relates to a kind of heat pump drying system, be specifically related to a kind of high efficiency heat pump drying system that can superhigh temperature be provided to blow at conventional environment temperature.
Background technology
Dry is the indispensable basic production link of large quantities of industrial and agricultural products always, also be big power consumer simultaneously, according to statistics, dry that the operation energy used accounts for my national economy total energy consumption about 12%, the pollution that dry run causes simultaneously is again the important sources of environmental pollution.Due to energy crisis, much traditional drying equipment is forced to reduction, and heat pump drying device is widely used as the product of energy-conserving and environment-protective.The mainly vapor compression heat pump of current industrial extensive use, it relies on refrigeration working medium circulation, absorbs outside air heat by evaporimeter, and the condensation heat discharged by condenser is in order to heat air in drying room to carry out drying to drying article.But the highest air-supply that can only provide less than 80 DEG C usually of existing market existing heat pump drying equipment, therefore in middle low temperature drying occasion work, can only be difficult to substitute traditional drying unit on a large scale, popularization has certain difficulty simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned the deficiencies in the prior art, a kind of superhigh temperature heat pump drying system is provided, maximized recovery is carried out to sensible heat contained in drying room and latent heat, relatively higher wind pushing temperature is provided, the evaporating temperature of abundant raising Drying unit, and then improve the efficiency of whole system, energy-conserving and environment-protective more.
The present invention designs and adopts following scheme for this reason:
A kind of superhigh temperature heat pump drying system, comprise drying room, also comprise the air-return duct be communicated with the air outlet of described drying room and return air inlet, be arranged at the circulating fan in air-return duct, the exhausting duct be communicated with air-return duct, be arranged at the air exhauster of the passway of exhausting duct, be arranged at the air heat recovery device of the intersection of air-return duct and exhausting duct, and at least two covers source pump used in parallel; The condenser of described source pump and evaporimeter are placed in air-return duct and exhausting duct respectively, described air heat recovery device comprises the first air flow channel and the second air flow channel, the import of described first air flow channel is communicated with return air inlet, and the outlet of the first air flow channel is communicated with the passway of exhausting duct by evaporimeter; The outlet of described second air flow channel is communicated with air outlet by condenser, and the import of the second air flow channel is directly communicated with the passway of exhausting duct; The export and import place of described first air flow channel is respectively equipped with first, second air cyclic switching door, and the passway of described exhausting duct is provided with the 3rd air cyclic switching door.
Further, the condenser of described arbitrarily source pump is composed in series by the main condenser be placed in air-return duct and the temperature adjustment condenser be placed in outside air-return duct.
Further, in described at least two cover source pump, the condenser of the source pump of relatively-high temperature level working medium is positioned at the side near air outlet, and the evaporimeter of relative low temperature level working medium is positioned at the side of the passway near exhausting duct.
Further, described air heat recovery device is heat recovering device.
Further, described heat recovering device is plate type heat exchanger or heat-pipe heat exchanger.
Beneficial effect of the present invention is:
The present invention adopts two covers or the above source pump parallel operation of two covers, the low-grade surrounding air heat of absorption is relied on to carry out heater riser temperature to drying room at the oven dry operation process initial stage, be warmed up to and to a certain degree afterwards the hot and humid air of discharging in drying room dehumidified, maximized recovery is carried out to wherein contained sensible heat and latent heat; Because of the gradient disparities of source pump cycle fluid temperature range, the wind pushing temperature making native system can provide relatively higher, ensures that the evaporating temperature of Drying unit fully improves simultaneously.
The present invention is particularly suitable for the occasion that required material of drying is suitable for hyperthermia drying; Can realize commonly using the higher drying room wind pushing temperature of heat pump drying device (more than 100 DEG C can be reached) relatively at present under the ambient temperature range of routine, not only utilize air heat recovery device to discharge High Temperature Moist Air to drying room and carry out Exposure degree, make dehumidified air closer to saturated air state, the effect on moisture extraction of better performance evaporimeter, fully improve the evaporating temperature of heat pump assembly simultaneously, reduce the pressure ratio of compressor, what improve heat pump work heats efficiency, makes whole drying unit energy-saving, environment-friendly and high-efficiency more.Thus can at more occasions, wider alternative conventional high-temperature drying unit.
Accompanying drawing explanation
Be described further with regard to the specific embodiment of the present invention below in conjunction with accompanying drawing, wherein:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the present invention's air channel air circulation process schematic diagram when heating mode works;
Fig. 3 is the present invention's air channel air circulation process schematic diagram when dehumidification mode works.
Detailed description of the invention
With reference to a kind of superhigh temperature heat pump drying system shown in Fig. 1, comprise drying room 16, the air-return duct 12a be communicated with air outlet 16b and the return air inlet 16a of drying room 16, be arranged at the circulating fan 9 in air-return duct 12a, the exhausting duct 12b be communicated with air-return duct 12a, be arranged at the air exhauster 8 of the passway of exhausting duct 12b, be arranged at the air heat recovery device 16 of the intersection of air-return duct 12a and exhausting duct 12b, and the two covers source pump used in parallel.
Every suit source pump is composed in series by pipeline by main refrigerant parts such as compressor 1, temperature adjustment condenser 2, main condenser 3, expansion valve 5, evaporimeter 6, device for drying and filtering 4, gas-liquid separators 7; Wherein, main condenser 3 is placed in air-return duct 12a, and evaporimeter 6 is placed in exhausting duct 12b; It is outer between compressor 1 and main condenser 3 (temperature adjustment condenser 2 also can be arranged between main condenser 3 and device for drying and filtering 4, two kinds of sortords all can) that temperature adjustment condenser 2 is arranged on air-return duct 12a.
In Fig. 1, source pump is only referred to main refrigerant parts, and in actual device, those skilled in the art can increase multiple accessories as required, as receiver, and valve etc.
Two cover source pump can respective independent start and stop, also also can open use simultaneously, and the compressor 1 often overlapping source pump can be fixed carrying, and also can be frequency conversion; Temperature adjustment condenser 3 can be air-cooled, can be also water-cooled, can share a set of blower fan time air-cooled, also can each self-configuring blower fan; Above-mentioned setting is because material usually can exist temperature-rise period, dehumidification process, constant-temperature moisture-keeping process in drying course, by such parts guarantee, and the regulating measure of comprehensive utilization heat pump unit, the adjustment requirement needed for realization.
Air heat recovery device 16 selects heat recovering device, specifically can select plate type heat exchanger or heat-pipe heat exchanger, air heat recovery device 16 comprises the first air flow channel 14a and the second air flow channel 14b, the import of the first air flow channel 14a is communicated with return air inlet 16a, and the outlet of the first air flow channel 14a is communicated with by the passway of evaporimeter 6 with exhausting duct 12b; The outlet of the second air flow channel 14b is led to main condenser 3 of crossing and is communicated with air outlet 16b, and the import of the second air flow channel 14b is directly communicated with the passway of exhausting duct 12b.
The passway place being respectively equipped with the first air cyclic switching door 13, second air cyclic switching door 15, exhausting duct 12b at the export and import place of the first air flow channel 14a is provided with the 3rd air cyclic switching door 11.
By several groups of air cyclic switching air doors, manual or automatic control two kinds of different air circulation modes can be realized in air-return duct and exhausting duct; A kind of is realize the full return air of drying room returns drying room successively again circulation by the first air flow channel of air heat recovery device, evaporimeter, the second air flow channel of air heat recovery device, main condenser; Another kind is that drying room return air is only returned drying room and outdoor new wind after heating by the main condenser circulation in air-return duct and discharged the endless form in air channel after absorbing heat again through introducing evaporimeter.
Concrete, with reference to the present invention's air circulation process in air channel when heating mode works shown in Fig. 2, first air cyclic switching door 13 of the first air flow channel 14a import and export both sides and the second air cyclic switching door 15 are closed downwards, blocked by first air flow channel 14a, the 3rd air cyclic switching door 11 is closed downwards and is stoped outdoor new wind circulation to enter the second air flow channel 14b; As shown by arrows, the evaporimeter 6 of the two groups of source pump in road, by system external environment heat, is transferred to respective condenser 3 to air flow, is directly discharged by the passway of exhausting duct 12b after heat absorption; Circulating air in another road UNICOM drying room 16, makes drying room be rapidly heated, and by absorbing low-grade air heat energy heating drying room, has saved the consumption of primary energy.
With reference to the present invention's air circulation process in air channel when dehumidification mode works shown in Fig. 3, first air cyclic switching door 13 of the first air flow channel 14a import and export both sides and the second air cyclic switching door 15 are upwards closed, and the 3rd air cyclic switching door 11 upwards closes the passway of exhausting duct 12b.The Hot wet air heating of drying room 16 must, first through the first air flow channel 14a, stop outdoor new wind to enter exhaust duct 12b from the first air cyclic switching door 13 simultaneously; Sensible heat is extracted supply by the relative low temperature air after evaporation dehumidifying by air heat recovery device 16 by Hot wet air heating in advance, again successively by evaporimeter 6 cool-down dehumidification of each source pump, after dehumidifying, air is first by after the preheating of high temperature return air, send into drying room 16 by the second air flow channel 14b after being heated up by each group of source pump condenser 3 successively, cycle of modes goes out wet according to this again.
Source pump of the present invention can adopt the different kind of refrigeration cycle working medium of two covers, and greatly promote drying room wind pushing temperature, such as low-temperature level uses R134a, and high-temperature level adopts the working medium such as the R227ea of R124 or R142b or environment-friendly type.Wherein the condenser of the source pump of high-temperature level working medium relative to the condenser installation site of the source pump of low-temperature level working medium closer to the side of air outlet, the evaporimeter of relative low temperature level working medium then installation site closer to the side of the passway of exhausting duct.Such working medium is selected more easily to make system be operated under high efficiency always, can not only the wind pushing temperature of abundant elevator system, accelerate the moisture evaporation in material, simultaneously due to often overlap evaporimeter all groundwork in the most high evaporation temperature close to corresponding working medium, the dehumidifying effect of evaporimeter is given full play to.
Adopt two of not equality of temperature level working medium cover source pump can realize commonly using the higher drying room wind pushing temperature of heat pump drying device relatively at present in common ambient temperature range, can reach close to 100 DEG C; Expand, if native system adopts the above source pump of two covers, high-temperature level unit adopts R236fa, R245fa, the water steam working medium of environment-friendly type, directly can realize the drying room wind pushing temperature of 100-150 DEG C; If there is the waste heat source of higher temperatures, or initially heat up to drying room by other heat source way when drying and starting, adopt native system separately again, only need two cover source pump combinations can realize the drying room air-supply of the highest 150 DEG C equally continuously, under this kind of condition, two cover source pump even can adopt identical kind of refrigeration cycle working medium.Heat due to environment for use air is only used to the initial temperature promoting drying room, along with the lifting of temperature, especially the lifting of drying room air absolute moisture content, just do not need to use the tow taste heat in external environment, so the present invention is in efficiency operation state in the overwhelming majority time period, power savings advantages is obvious.
The above; be only the better detailed description of the invention of the present invention, but scope is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore scope is as the criterion with the protection domain of claims.

Claims (4)

1. a superhigh temperature heat pump drying system, comprise drying room, it is characterized in that, also comprise the air-return duct be communicated with the air outlet of described drying room and return air inlet, be arranged at the circulating fan in air-return duct, the exhausting duct be communicated with air-return duct, be arranged at the air exhauster of the passway of exhausting duct, be arranged at the air heat recovery device of the intersection of air-return duct and exhausting duct, and at least two covers source pump used in parallel; The condenser of described source pump and evaporimeter are placed in air-return duct and exhausting duct respectively, described air heat recovery device comprises the first air flow channel and the second air flow channel, the import of described first air flow channel is communicated with return air inlet, and the outlet of the first air flow channel is communicated with the passway of exhausting duct by evaporimeter; The outlet of described second air flow channel is communicated with air outlet by condenser, and the import of the second air flow channel is directly communicated with the passway of exhausting duct; The export and import place of described first air flow channel is respectively equipped with first, second air cyclic switching door, and the passway of described exhausting duct is provided with the 3rd air cyclic switching door.
2. a kind of superhigh temperature heat pump drying system according to claim 1, is characterized in that, the condenser of source pump described is arbitrarily composed in series by the main condenser be placed in air-return duct and the temperature adjustment condenser be placed in outside air-return duct.
3. a kind of superhigh temperature heat pump drying system according to claim 1, it is characterized in that, in described at least two cover source pump, the condenser of the source pump of relatively-high temperature level working medium is positioned at the side near air outlet, and the evaporimeter of relative low temperature level working medium is positioned at the side of the passway near exhausting duct.
4. a kind of superhigh temperature heat pump drying system according to claim 1, is characterized in that, described air heat recovery device is heat recovering device.
CN201510433292.2A 2015-07-22 2015-07-22 Superhigh-temperature heat pump drying system Pending CN105021015A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105276688A (en) * 2015-12-03 2016-01-27 王言明 High-temperature large-temperature-difference heat pump dehumidifier
CN107036407A (en) * 2017-05-03 2017-08-11 苏宇贵 Natural dehumidifying drying system
CN107449266A (en) * 2017-07-01 2017-12-08 烟台明辉热泵节能科技有限公司 A kind of tunnel drying system and furnace drying method
CN107462063A (en) * 2017-08-21 2017-12-12 烟台明辉热泵节能科技有限公司 Heat pump drying system and furnace drying method
CN109282587A (en) * 2018-10-10 2019-01-29 青岛大学 A kind of heat pump dryer of cooling and dehumidifying evaporator symmetric parallel arrangement

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CN204902523U (en) * 2015-07-22 2015-12-23 合肥淘能环境科技有限公司 Super high temperature heat pump drying system

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105276688A (en) * 2015-12-03 2016-01-27 王言明 High-temperature large-temperature-difference heat pump dehumidifier
CN107036407A (en) * 2017-05-03 2017-08-11 苏宇贵 Natural dehumidifying drying system
CN107449266A (en) * 2017-07-01 2017-12-08 烟台明辉热泵节能科技有限公司 A kind of tunnel drying system and furnace drying method
CN107462063A (en) * 2017-08-21 2017-12-12 烟台明辉热泵节能科技有限公司 Heat pump drying system and furnace drying method
CN109282587A (en) * 2018-10-10 2019-01-29 青岛大学 A kind of heat pump dryer of cooling and dehumidifying evaporator symmetric parallel arrangement

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