CN110986561A - Heat recovery type high-temperature drying special heat pump unit and operation method thereof - Google Patents
Heat recovery type high-temperature drying special heat pump unit and operation method thereof Download PDFInfo
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- CN110986561A CN110986561A CN201911044609.8A CN201911044609A CN110986561A CN 110986561 A CN110986561 A CN 110986561A CN 201911044609 A CN201911044609 A CN 201911044609A CN 110986561 A CN110986561 A CN 110986561A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse 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
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a heat recovery type high-temperature drying special heat pump unit and an operation method thereof, and belongs to the technical field of material drying equipment. The method solves the problem that waste heat generated in the processing process of enterprises cannot be well utilized. The heat recovery type special heat pump unit for high-temperature drying comprises a compressor, a condenser, a throttler and an evaporator, wherein the device is sequentially connected through a refrigerant pipe to form a refrigerant circulating system. The heat recovery type high-temperature drying special heat pump unit and the operation method thereof have the advantages that: the problem of processing enterprise's charges of electricity cost is high when the required material of stoving production is solved, partial waste heat source has been saved to the while cooling part cooling cost.
Description
Technical Field
The invention belongs to the technical field of material drying equipment, and particularly relates to a heat recovery type high-temperature drying special heat pump unit for auxiliary heating by utilizing an existing heat source and an operation method thereof.
Background
Copper pipe processing enterprise and similar enterprise when drying similar materials such as copper bits, adopt the mode of electrical heating stoving usually, have the working costs height, the accuse temperature is inaccurate, and the energy consumption is big shortcoming such as, and this type of enterprise can produce the higher waste water of a large amount of temperatures in process of production, and the heat of this type of waste water is in the state of not utilizing basically at present, and the energy has been wasted to vain.
Disclosure of Invention
The invention aims to solve the problems and provides a heat recovery type high-temperature drying special heat pump unit which is reasonable in design and solves the problem that the existing enterprises cannot utilize the heat of a large amount of waste heat with higher temperature generated in the processing process to dry production materials, but use electricity with high energy consumption to heat and dry the production materials.
Another objective of the present invention is to provide an operation method of a heat recovery type high temperature drying special heat pump unit for increasing drying temperature by using waste heat.
In order to achieve the purpose, the invention adopts the following technical scheme: the invention relates to a heat recovery type high-temperature drying special heat pump unit, which comprises a compressor, a condenser, a restrictor, an evaporator and a refrigerant circulating system formed by sequentially connecting the devices through refrigerant pipes, and is characterized in that: the heat pump unit further comprises a heat recoverer and a heating channel for flowing of air to be heated, the heat recoverer and the condenser are sequentially arranged in the heating channel along the flowing direction of the air to be heated, a first heat flow input pipe and a first heat flow output pipe which are used for heating relatively high-temperature heat flow flowing into and flowing out of the air flowing into the heating channel are arranged on the heat recoverer, one end of each of the first heat flow input pipe and the first heat flow output pipe is communicated to the outside of the heating channel, and one end of the first heat flow input pipe is communicated with an external heat source.
In the heat recovery type heat pump unit dedicated for high-temperature drying, the one end of the first heat flow output pipe is communicated with a second heat flow input pipe which is arranged on an evaporator outside the heating channel and used for inputting relatively low-temperature heat flow for absorbing heat of a refrigerant in the evaporator, and the second heat flow output pipe on the evaporator and used for outputting heat flow exchanged with the refrigerant in the evaporator is communicated with an external cold flow recovery device.
In the heat recovery type high-temperature drying special heat pump unit, the first heat flow input pipe is provided with a heat flow pump.
In the heat recovery type high-temperature drying special heat pump unit, at least one heating element is arranged between the condenser and the air outflow end in the heating channel.
In the heat recovery type high-temperature drying special heat pump unit, a suction fan used for accelerating the air in the heating channel to flow to the air outflow end is arranged in the heating channel and close to the air outflow end.
In the operation method of the heat recovery type high-temperature drying special heat pump unit, the heat pump hot water unit used in the heating method is the heat pump unit, and the operation method comprises the following steps:
starting a compressor in the unit, so that a refrigerant flows in the compressor, the condenser, the throttler and the evaporator through refrigerant pipes to form a refrigerant circulating system;
the temperature is THeat flow 1The external heat source is input into a heat recoverer positioned in a heating channel in a fluid mode through a first heat flow input pipe, and the temperature entering the heating channel from one end of the heating channel is TOf air 1The air to be heated and the heat surface of the heat recovery device with the heat flow with relatively high temperature flowing inside carry out first heat exchange, and after the first heat exchange, the temperature of the heat flow flowing into the first heat flow output pipe is reduced to THeat flow 2The temperature of the air is raised to a preset TPreset 1；
Temperature has reached TPreset 1The air to be heated then flows into the area where the condenser is located in the heating channel, and carries out second heat exchange with the hot surface of the condenser, and after the second heat exchange, the temperature of the air is raised toPreset TPreset 2；
The temperature has reached TPreset 2The air to be heated flows out from the other end of the heating channel to the outside to be subjected to heat exchange with the material to be dried.
In the operation method of the heat recovery type high-temperature drying special heat pump unit, the operation method further comprises the following steps: the temperature has reached TPreset 2Before flowing out of the other end of the heating channel, the air to be heated flows into the area where the heating element in the heating channel is located, and carries out third heat exchange with the hot surface of the heating element, and after the third heat exchange, the temperature of the air is raised to the preset TPreset 3。
In the operation method of the heat recovery type high-temperature drying special heat pump unit, the operation method further comprises the following steps: and opening the suction fan arranged in the other end of the heating channel, and determining the current working frequency of the suction fan according to the temperature, the flow speed and the flow of the air flowing out of the other end of the heating channel.
In the operation method of the heat recovery type high-temperature drying special heat pump unit, the operation method further comprises the following steps: the temperature of the heat flow flowing out of the first heat flow output pipe is reduced to THeat flow 2The relatively low temperature heat flow flows into a second heat flow input pipe arranged on the evaporator outside the heating channel so as to perform fourth heat exchange with the refrigerant in the evaporator, and after the fourth heat exchange, the temperature of the heat flow is reduced to THeat flow 3And exits the second heat flow output tube.
In the operation method of the heat recovery type high-temperature drying special heat pump unit, the operation method further comprises the following steps: the temperature of the liquid flowing out of the second heat flow output pipe is reduced to THeat flow 3To a cold fluid recovery unit.
Compared with the prior art, the heat recovery type high-temperature drying special heat pump unit and the operation method thereof have the advantages that:
1. the heat pump unit is applied to the drying process in copper pipe processing enterprises and similar enterprises, and the defects of high operating cost, inaccurate temperature control, high energy consumption and the like caused by the fact that the existing drying process of the enterprises is only provided with electric heating drying equipment are overcome;
2. the heat recoverer in the heat pump unit can generate a large amount of waste water or waste steam with higher temperature in the production process by utilizing copper pipe processing enterprises and similar enterprises so as to improve the temperature of air to be heated before heat exchange with the condenser, thereby being beneficial to providing a heat source with higher temperature in the drying process of the enterprises;
3. waste water or waste steam after heat release in a heat recoverer in the heat pump unit enters an evaporator to exchange heat with a refrigerant, so that secondary heat release is realized, the temperature of the waste water or the waste steam is further reduced, the evaporator is converted into higher-grade heat through a compressor after absorbing the heat of process waste heat and releases the higher-grade heat to a condenser, and the cost required by cooling treatment of the high-temperature waste water or the waste steam originally in an enterprise is also saved;
4. the arrangement of the heating element in the heat pump unit further improves the temperature of the air to be heated when the air flows out of the heating channel, so that a better heat source is provided for the drying process of enterprises;
5. the suction fan in the heat recovery device in the heat pump unit is beneficial to enhancing the regulation of the flow speed, flow and temperature of the heated air.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 provides a schematic diagram of the structure of an embodiment of the present invention.
FIG. 2 provides a functional diagram of an embodiment of the present invention during operation.
In the figure, a compressor 101, a condenser 102, a restrictor 103, an evaporator 104, a refrigerant pipe 105, a heating channel 106, a heat recoverer 107, a first heat flow input pipe 108, a first heat flow output pipe 109, a second heat flow input pipe 110, a second heat flow output pipe 111, a heat flow pump 112, a heating element 113 and a suction fan 114 are arranged.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1, the heat recovery type heat pump unit dedicated for high temperature drying comprises a compressor 101, a condenser 102, a restrictor 103, an evaporator 104, and a refrigerant circulation system formed by sequentially connecting the above devices by a refrigerant pipe 105, and further comprises a heat recovery unit 107 and a heating channel 106 for flowing air to be heated, wherein the heat recovery unit 107 and the condenser 102 are sequentially arranged in the heating channel 106 along the flowing direction of the air to be heated, the heat recovery unit 107 is provided with a first heat flow input pipe 108 and a first heat flow output pipe 109 for flowing in and out relatively high temperature heat flow for heating the air flowing into the heating channel 106, each end of the first heat flow input pipe 108 and the first heat flow output pipe 109 is communicated to the outside of the heating channel 106, the end of the first heat flow input pipe 108 is communicated with an external heat source, wherein the external heat source generally, but not limited to be high temperature, generated in the production process of an enterprise, However, the waste heat source is usually wasted, and the enterprise may pay a cooling cost to lower the temperature of the heat source.
The above mentioned throttle 103 can be of various types, including but not limited to the following: electronic expansion valve, capillary, choke pipe.
The relatively high-temperature heat flow refers to waste water or waste steam with high temperature discharged by enterprises in the production process, such as copper pipe processing enterprises and the like, which generate a large amount of waste water with high temperature in the production process.
The evaporator 104 is internally filled with two fluids, i.e., waste water or waste steam with a relatively high temperature, and a refrigerant, and a double pipe heat exchanger can be generally used, but not limited to.
Additionally, a heat flow pump 112 is disposed on the first heat input pipe 108 to improve the control of the relatively high temperature heat input.
Preferably, the one end of the first hot fluid output pipe 109 is connected to a second hot fluid input pipe 110, which is arranged outside the heating channel 106 and is used for inputting a relatively low-temperature hot fluid for absorbing heat by the refrigerant in the evaporator 104, the second hot fluid output pipe 111, which is arranged on the evaporator 104 and is used for outputting the hot fluid after heat exchange with the refrigerant in the evaporator 104, is connected to an external cold fluid recovery device, and the hot fluid flows into the cold fluid recovery device and can be reused in other production processes, wherein the cold fluid recovery device can be, but is not limited to, a water storage tank.
Further, at least one heating element 113 is disposed in the heating channel 106 from the condenser 102 to the air outflow end, specifically, the heating element 113 may be a common hollow metal pipe through which hot water or hot oil for heat exchange with external air to be heated flows, or an electric heating pipe as required, or other heating sources, and the number of the heating elements 113 is at least 2, so as to ensure that the at least one heating element 113 is in an operating state during the operation of the heat pump unit.
Preferably, a suction fan 114 is disposed in the heating channel 106 near the air outflow end for accelerating the air in the heating channel 106 to flow toward the air outflow end.
The specific implementation of the operation method of the heat recovery type high-temperature drying special heat pump unit includes, but is not limited to, the following embodiments.
As shown in fig. 2, in the operation method of the heat recovery type high-temperature drying special heat pump unit, the heat pump hot water unit is the heat pump unit, and the operation method comprises the following steps:
starting a compressor 101 in the unit, so that a refrigerant flows in the compressor 101, a condenser 102, a restrictor 103 and an evaporator 104 through a refrigerant pipe 105 to form a refrigerant circulating system;
inputting the waste water with the temperature of 60 ℃ into a heat recoverer 107 positioned in a heating channel 106 in a fluid mode through a first heat flow input pipe 108, carrying out first heat exchange on air with the temperature of 20 ℃ entering the heating channel 106 from one end of the heating channel 106 and the heat surface of the heat recoverer 107 internally flowing the waste water with the relatively high temperature, and after the first heat exchange, reducing the temperature of the waste water flowing into a first heat flow output pipe 109 to about 30 ℃ and increasing the temperature of the air to 50 ℃;
the air to be heated, the temperature of which has reached 50 ℃, then flows into the area where the condenser 102 is located in the heating channel 106, and performs a second heat exchange with the hot surface of the condenser 102, and after the second heat exchange, the temperature of the air is raised to a preset temperature of 70 ℃;
in the copper scrap drying process, the heated air flowing out of the heating channel 106 in the heat pump unit is input to the copper scrap to be dried which is carried on a closed conveying belt and runs slowly, so as to dry the copper scrap.
Additionally, the method of operation further comprises the steps of: the air to be heated, the temperature of which has reached 70 ℃, flows into the region where the electric heater is located in the heating passage 106 before flowing out of the other end of the heating passage 106, and performs third heat exchange with the hot surface of the electric heater, and after the third heat exchange, the temperature of the air is raised to the preset temperature of 90 ℃.
Additionally, the method of operation further comprises the steps of: the suction fan 114 located in the other end of the heating tunnel 106 is turned on and the current operating frequency of the suction fan 114 is determined based on the temperature, flow rate and flow of air exiting the other end of the heating tunnel 106.
Additionally, the method of operation further comprises the steps of: the relatively low-temperature waste water having a temperature reduced to about 30 ℃ flowing out of the first heat flow output pipe 109 flows into the second heat flow input pipe 110 of the evaporator 104 provided outside the heating passage 106 to perform fourth heat exchange with the refrigerant in the evaporator 104, and after the fourth heat exchange, the temperature of the waste water is reduced to 20 ℃ and flows out of the second heat flow output pipe 111.
Additionally, the method of operation further comprises the steps of: the waste water with the temperature reduced to 20 ℃ from the second hot flow output pipe 111 flows to a water storage tank, and the waste water in the water storage tank can be reused in other production processes.
It should be noted that the various temperature values involved in the above operation method are only specific data used in this embodiment, and these specific data cannot cover all data when using this operation method, because in reality, the temperatures of the available waste water or waste steam are different, and the requirements for the temperature of the hot air provided by the heat pump unit are different according to the different materials to be dried, and in addition, the temperature, flow rate and flow rate of the hot air finally provided by the heat pump unit are different due to the influence of the power and model of each device in the heat pump unit.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms compressor 101, condenser 102, restrictor 103, evaporator 104, refrigerant pipe 105, heating channel 106, heat recovery unit 107, first hot fluid input pipe 108, first hot fluid output pipe 109, second hot fluid input pipe 110, second hot fluid output pipe 111, hot fluid pump 112, heating element 113, suction fan 114, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. The utility model provides a special heat pump set of heat recovery formula high temperature stoving, includes compressor (101), condenser (102), throttle (103) and evaporimeter (104) and connects gradually a refrigerant circulation system, its characterized in that with foretell device by refrigerant pipe (105): the heat pump unit further comprises a heat recoverer (107) and a heating channel (106) for flowing of air to be heated, the heat recoverer (107) and the condenser (102) are sequentially arranged in the heating channel (106) along the flowing direction of the air to be heated, a first heat flow input pipe (108) and a first heat flow output pipe (109) which are used for heating relatively high-temperature heat flow flowing into and flowing out of the air flowing into the heating channel (106) are arranged on the heat recoverer (107), one ends of the first heat flow input pipe (108) and one end of the first heat flow output pipe (109) are communicated to the outside of the heating channel (106), and one end of the first heat flow input pipe (108) is communicated with an external heat source.
2. The heat recovery type heat pump unit specially used for high-temperature drying of claim 1, wherein the one end of the first heat flow output pipe (109) is communicated with a second heat flow input pipe (110) which is arranged on the evaporator (104) outside the heating channel (106) and is used for inputting relatively low-temperature heat flow for absorbing heat of the refrigerant in the evaporator (104), and a second heat flow output pipe (111) which is arranged on the evaporator (104) and is used for outputting heat flow which is subjected to heat exchange with the refrigerant in the evaporator (104) is communicated with an external cold flow recovery device.
3. The heat recovery type high-temperature drying special heat pump unit according to claim 1, wherein a heat flow pump (112) is arranged on the first heat flow input pipe (108).
4. The heat recovery type heat pump unit specially used for high-temperature drying according to any one of claims 1 to 3, wherein at least one heating element (113) is arranged in the heating channel (106) from the condenser (102) to the air outflow end.
5. The heat recovery type heat pump unit specially used for high-temperature drying according to claim 4, wherein a suction fan (114) used for accelerating the air in the heating channel (106) to flow to the air outflow end is arranged in the heating channel (106) and close to the air outflow end.
6. An operation method of a heat recovery type high-temperature drying special heat pump unit is characterized in that a heat pump hot water unit used in the heating method is the heat pump unit of any one of claims 1 to 5, and comprises the following steps:
starting a compressor (101) in the unit, and enabling a refrigerant to flow in the compressor (101), a condenser (102), a throttler (103) and an evaporator (104) through a refrigerant pipe (105) to form a refrigerant circulating system;
the temperature is THeat flow 1Is fed in fluid form via a first heat flow feed pipe (108) to a heat recovery unit (107) located in the heating channel (106), the temperature entering the heating channel (106) from one end of the heating channel (106) being TOf air 1The air to be heated and the heat surface of the heat recoverer (107) flowing the heat flow with relatively high temperature inside carry out the first heat exchange, after the first heat exchange, the temperature of the heat flow flowing into the first heat flow output pipe (109) is reduced to THeat flow 2The temperature of the air is raised to a preset TPreset 1；
Temperature has reached TPreset 1Then flows into the area where the condenser (102) is located in the heating channel (106) to perform a second heat exchange with the hot surface of the condenser (102), and after the second heat exchange, the temperature of the air is raised to a preset TPreset 2；
The temperature has reached TPreset 2The air to be heated flows out from the other end of the heating channel (106) to exchange heat with the external material to be dried.
7. The operation method of the heat recovery type high temperature drying special heat pump unit according to claim 6, characterized in that the operation method further comprises the following steps: the temperature has reached TPreset 2Before flowing out of the other end of the heating channel (106), the air to be heated flows into the area where the heating element (113) is positioned in the heating channel (106) to carry out third heat exchange with the hot surface of the heating element (113), and after the third heat exchange, the temperature of the air is raised to the preset TPreset 3。
8. The operation method of the heat recovery type high temperature drying special heat pump unit according to claim 6, characterized in that the operation method further comprises the following steps: opening a suction fan (114) disposed in the other end of the heating channel (106) and determining a current operating frequency of the suction fan (114) based on the temperature, flow rate and flow rate of air exiting the other end of the heating channel (106).
9. The operation method of the heat recovery type high temperature drying special heat pump unit according to claim 6, characterized in that the operation method further comprises the following steps: the temperature drop of the heat flow from the first heat flow output pipe (109) is THeat flow 2The relatively low-temperature heat flow flows into a second heat flow input pipe (110) arranged on the evaporator (104) outside the heating channel (106) so as to carry out fourth heat exchange with the refrigerant in the evaporator (104), and after the fourth heat exchange, the temperature of the heat flow is reduced to THeat flow 3And exits from the second hot fluid outlet pipe (111).
10. The operation method of the heat recovery type high temperature drying special heat pump unit according to claim 9, characterized in that the operation method further comprises the following steps: the temperature drop of the heat flow from the second heat flow output pipe (111) is THeat flow 3To a cold fluid recovery unit.
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| CN201911044609.8A CN110986561A (en) | 2019-10-30 | 2019-10-30 | Heat recovery type high-temperature drying special heat pump unit and operation method thereof |
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| CN201911044609.8A CN110986561A (en) | 2019-10-30 | 2019-10-30 | Heat recovery type high-temperature drying special heat pump unit and operation method thereof |
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| CN204513991U (en) * | 2015-04-03 | 2015-07-29 | 西安永创节能设备有限公司 | The high temperature heat pump printing drying system that a kind of Inner eycle secondary recovery utilizes |
| CN205655523U (en) * | 2016-05-13 | 2016-10-19 | 包头鹏翔锅炉暖通设备有限责任公司 | Thermal wastewater heat recovery unit |
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| CN108185501A (en) * | 2018-03-12 | 2018-06-22 | 湖南科技大学 | Clean bulk curing barn heat supply dehumidification device that can be complementary |
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Address after: 323000 No.96 Yunjing Road, Shuige Industrial Park, Lishui City, Zhejiang Province Applicant after: Zhejiang Zhongguang Electric Appliance Group Co.,Ltd. Address before: 323000 No.96 Yunjing Road, Shuige Industrial Park, Lishui City, Zhejiang Province Applicant before: ZHEJIANG ZHONGGUANG ELECTRIC APPLIANCES Co.,Ltd. |