CN216347672U - Double-refrigerant coupling high-temperature drying system containing carbon dioxide - Google Patents
Double-refrigerant coupling high-temperature drying system containing carbon dioxide Download PDFInfo
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- CN216347672U CN216347672U CN202121224740.5U CN202121224740U CN216347672U CN 216347672 U CN216347672 U CN 216347672U CN 202121224740 U CN202121224740 U CN 202121224740U CN 216347672 U CN216347672 U CN 216347672U
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Abstract
The utility model discloses a double-refrigerant coupling high-temperature drying system containing carbon dioxide, which comprises: the drying room, first condenser, the heat pump evaporator, the carbon dioxide evaporator, first carbon dioxide air cooler, second carbon dioxide air cooler, the second condenser, the heat pump compressor, the carbon dioxide compressor, the coupling heat exchanger, through having coupled the carbon dioxide medium in conventional heat pump drying system and circulated cooling and intensification, under the transcritical characteristic of carbon dioxide medium, make whole drying system more efficient to the removal of moisture, and can heat the air to higher temperature to reduce air flow rate, practice thrift the energy consumption.
Description
Technical Field
The utility model relates to the field of drying, in particular to a double-refrigerant coupling high-temperature drying system containing carbon dioxide.
Background
In the production process, objects in a drying chamber are often required to be dried, the traditional heat pump dehumidification drying system is limited by the characteristics of a refrigerant, the drying temperature cannot reach more than 85 ℃, and high-temperature dehumidification generally adopts two modes, namely large air quantity and small temperature difference, and small air quantity and large temperature difference. And at the in-process of drying cooling dewatering, satisfying with the heat add the condition in the baking house in, the air flow speed is the better slowly, can make the moisture in the air by more abundant precipitation, but because the restriction of traditional heat pump dehumidification drying system air supply temperature, it is great to lead to the in-process wind speed that the air current is cooled back to the temperature, makes dewatering effect relatively poor, and the energy consumption is also relatively higher.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model aims to provide a high-temperature drying system with higher temperature and higher dewatering efficiency.
The technical scheme adopted by the utility model for solving the problems is as follows: a dual-refrigerant coupling high-temperature drying system containing carbon dioxide comprises:
the drying room is internally provided with a return air duct, the tail end of the return air duct is connected with at least one conventional air outlet duct and at least one condensation air outlet duct, the tail ends of the conventional air outlet duct and the condensation air outlet duct are communicated with the drying room, circulating fans are arranged in the conventional air outlet duct and the condensation air outlet duct, and a heat exchanger is arranged in the return air duct;
the first condenser is arranged in the conventional air outlet duct;
the heat pump evaporator is arranged in the condensation air outlet duct;
the carbon dioxide evaporator is arranged in the condensation air outlet duct;
the first carbon dioxide gas cooler is arranged at the rear ends of the carbon dioxide evaporator and the heat pump evaporator;
a second carbon dioxide gas cooler arranged at the rear end of the first carbon dioxide gas cooler;
the second condenser is arranged at the rear end of the carbon dioxide evaporator and the rear end of the heat pump evaporator;
the heat pump compressor is sequentially communicated with the first condenser, the second condenser and the heat pump evaporator in a circulating manner;
the carbon dioxide compressor is communicated with the carbon dioxide evaporator, the first carbon dioxide gas cooler and the second carbon dioxide gas cooler in sequence;
the heat exchanger comprises a coupling heat exchanger, two groups of refrigerant circulation channels which are mutually coupled and exchange heat are arranged in the coupling heat exchanger, two ends of one group of refrigerant circulation channels are respectively communicated with a carbon dioxide evaporator and a first carbon dioxide gas cooler, a carbon dioxide expansion valve is arranged between the coupling heat exchanger and the carbon dioxide evaporator, and two ends of the other group of refrigerant circulation channels are respectively communicated with a heat pump evaporator and a heat pump compressor.
As a further improvement of the above technical solution, a precooler and a heat regenerator integrated with the precooler are arranged in the condensation air outlet duct, the precooler is located at the front ends of the heat pump evaporator and the carbon dioxide evaporator, the heat regenerator is located at the rear ends of the carbon dioxide evaporator and the heat pump evaporator, and the heat regenerator is located at the front ends of the first carbon dioxide air cooler, the second carbon dioxide air cooler and the second condenser.
As a further improvement of the above technical solution, the precooler and the reheater include an upper air duct and a lower air duct communicated with the upper air duct, and the upper air duct and the lower air duct intersect to form an intersecting air duct; the outer wall of the upper air duct and the outer wall of the lower air duct are mutually abutted at the intersection, and the carbon dioxide evaporator and the heat pump evaporator are arranged at the joint of the upper air duct and the lower air duct.
As a further improvement of the above technical solution, a heat pump expansion valve is disposed between the second condenser and the heat pump evaporator.
As a further improvement of the above technical solution, the second condenser is located between the first carbon dioxide gas cooler and the second carbon dioxide gas cooler.
As a further improvement of the technical scheme, the heat pump evaporator is positioned at the rear end of the carbon dioxide evaporator.
The utility model has the beneficial effects that: after the object in the drying chamber is heated by high temperature in the drying chamber to dry out water vapor, hot air containing the water vapor enters the return air duct under the action of the circulating fan, then is cooled by the heat exchanger in the return air duct, then the air entering the return air duct is divided into two flows, one of the flows is heated by the first condenser and flows back into the drying chamber through the conventional air outlet duct, so that the heat in the drying chamber is complemented, the temperature in the drying chamber is prevented from dropping, the other flow enters the condensation air outlet duct, meanwhile, the double sufficient cooling is carried out through the heat pump evaporator and the carbon dioxide evaporator, so that the water in the air is analyzed, then the air after the water is separated out is heated and flows back into the drying chamber through the first carbon dioxide air cooler and the second carbon dioxide air cooler, and meanwhile, the temperature is complemented through the second condenser. In the process, the carbon dioxide compressor is sequentially communicated with the carbon dioxide evaporator, the first carbon dioxide gas cooler and the second carbon dioxide gas cooler, so that the temperature of the carbon dioxide medium is sequentially reduced in the second carbon dioxide gas cooler and the first carbon dioxide gas cooler in the flowing process of the carbon dioxide medium to form a gradient difference, and the transcritical characteristic of the carbon dioxide enables the temperature of the air to be fully raised to more than ninety degrees in the heating process of the gradient difference, so that the air speed of the air in the condensation air outlet duct is lower, the carbon dioxide medium after heat absorption further reduces the temperature through the coupling heat exchanger and enters the carbon dioxide evaporator, the air at the front end of the condensation air outlet duct is cooled to separate out moisture, then the carbon dioxide medium flows back to the carbon dioxide compressor for temperature return, and in the process, the coupling heat exchanger is simultaneously communicated with the heat pump evaporator and the heat pump compressor, so that heat absorbed in the process of cooling the carbon dioxide medium by coupling is absorbed by a heat pump refrigerant flowing through the heat pump evaporator and then flows back to the heat pump compressor, and the heat in the coupling process is exchanged in the carbon dioxide system and the heat pump system, so that the heat loss of the part can be avoided, and the energy-saving effect is achieved. Carbon dioxide medium has been gone into through the coupling, can be with the higher of air temperature promotion, and then reduce the velocity of flow in condensation air-out wind channel, practice thrift the circulating fan energy consumption, make whole high temperature drying system stoving dewatering effect better.
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The utility model is further explained below with reference to the drawing description and the detailed description.
Fig. 1 is a schematic structural view of a preferred embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, a dual refrigerant coupling high temperature drying system including carbon dioxide includes:
the drying room 1 is internally provided with a return air duct, the tail end of the return air duct is connected with at least one conventional outlet air duct and at least one condensation outlet air duct, the tail ends of the conventional outlet air duct and the condensation outlet air duct are communicated with the drying room 1, circulating fans 3 are respectively arranged in the conventional outlet air duct and the condensation outlet air duct, and a heat exchanger 2 is arranged in the return air duct;
the first condenser 5 is arranged in the conventional air outlet duct;
the heat pump evaporator 10 is arranged in the condensation air outlet duct, and the heat pump evaporator 10 is arranged in the condensation air outlet duct;
the carbon dioxide evaporator 11 is arranged in the condensation air outlet duct;
a first carbon dioxide gas cooler 8, wherein the first carbon dioxide gas cooler 8 is arranged at the rear ends of the carbon dioxide evaporator 11 and the heat pump evaporator 10;
a second carbon dioxide gas cooler 6, wherein the second carbon dioxide gas cooler 6 is arranged at the rear end of the first carbon dioxide gas cooler 8;
the second condenser 7, the said second condenser 7 is set up in the rear end of the carbon dioxide evaporator 11 and rear end of the heat pump evaporator 10;
the heat pump compressor 4 is sequentially communicated with the first condenser 5, the second condenser 7 and the heat pump evaporator 10 in a circulating manner, so that a refrigerant in the heat pump compressor 4 is sequentially communicated among the first condenser 5, the second condenser 7 and the heat pump evaporator 10 in a circulating manner;
a carbon dioxide compressor 16, wherein the carbon dioxide compressor 16 is communicated with the carbon dioxide evaporator 11, the first carbon dioxide gas cooler 8 and the second carbon dioxide gas cooler 6 in sequence;
the heat pump system comprises a coupling heat exchanger 13, two groups of refrigerant circulation channels which are mutually coupled and exchange heat are arranged in the coupling heat exchanger, two ends of one group of refrigerant circulation channels are respectively communicated with a carbon dioxide evaporator 11 and a first carbon dioxide air cooler 8, a carbon dioxide expansion valve 15 is arranged between the coupling heat exchanger 13 and the carbon dioxide evaporator 11, and two ends of the other group of refrigerant circulation channels are respectively communicated with a heat pump evaporator 10 and a heat pump compressor 4.
After the high temperature in the drying chamber 1 heats the object in the drying chamber 1 to dry out the water vapor, the hot air containing the water vapor enters the return air duct under the action of the circulating fan 3, then cooled by the heat exchanger 2 in the return air duct, then the air entering the return air duct is divided into two paths, one of the air flows is heated by a first condenser 5 through a conventional air outlet duct and flows back into the drying chamber 1, thereby supplementing the heat in the drying chamber 1, preventing the temperature in the drying chamber 1 from dropping, leading the other air flow to enter the condensation air outlet duct, and simultaneously, the temperature is reduced and cooled sufficiently by the heat pump evaporator 10 and the carbon dioxide evaporator 11, so that the water in the air is analyzed, the air from which the moisture is separated is heated and refluxed into the baking chamber 1 by the first carbon dioxide gas cooler 8 and the second carbon dioxide gas cooler 6, and the temperature is supplemented by the second condenser 7. In the process, the carbon dioxide compressor 16 is sequentially communicated with the carbon dioxide evaporator 11, the first carbon dioxide gas cooler 8 and the second carbon dioxide gas cooler 6, so that in the flowing process of the carbon dioxide medium, the temperature of the carbon dioxide medium is sequentially reduced in the second carbon dioxide gas cooler 6 and the first carbon dioxide gas cooler 8 to form a gradient difference, and the transcritical characteristic of the carbon dioxide enables the temperature of the air to be fully raised to more than ninety degrees in the heating process of the gradient difference, so that the air speed of the air in the condensation air outlet duct is lower, the carbon dioxide medium after heat absorption further reduces the temperature through the coupling heat exchanger 13 and enters the carbon dioxide evaporator 11, the air at the front end of the condensation air outlet duct is cooled to separate out moisture, and then the carbon dioxide medium flows back to the carbon dioxide compressor 16 to be heated, in the process, the coupling heat exchanger 13 is simultaneously communicated with the heat pump evaporator 10 and the heat pump compressor 4, so that heat absorbed in the process of cooling the carbon dioxide medium by coupling is absorbed by a heat pump refrigerant flowing through the heat pump evaporator 10 and then flows back into the heat pump compressor 4, and the heat in the coupling process is exchanged between the carbon dioxide system and the heat pump system, so that the heat loss of the part can be avoided, and the energy-saving effect is achieved. Carbon dioxide medium has been gone into through the coupling, can be with the higher of air temperature promotion, and then reduce the velocity of flow in condensation air-out wind channel, practice thrift the circulating fan energy consumption, make whole high temperature drying system stoving dewatering effect better.
In this embodiment, the coupling heat exchanger 13 is preferably a plate heat exchanger or a double pipe heat exchanger, and may be a heat exchanger capable of performing coupling heat exchange in other forms.
In this scheme, return air duct, conventional air-out wind channel, condensation air-out wind channel can be substantive pipeline, also can be for not having the wind channel of entity, and its purpose lies in forming the circulation air current.
In the above-described embodiment, a heat pump expansion valve 14 is preferably provided between the second condenser 7 and the heat pump evaporator 10.
Preferably, the second condenser 7 is located between the first carbon dioxide gas cooler 8 and the second carbon dioxide gas cooler 6.
Further preferably, the heat pump evaporator 10 is located at the rear end of the carbon dioxide evaporator 11.
Further, for better cooling and water removal of air when the air passes through the heat pump evaporator 10 and is located in the carbon dioxide evaporator 11, it is preferable that a precooler 12 and a reheater 9 integrated with the precooler 12 are disposed in the condensation air outlet duct, the precooler 12 is located at the front ends of the heat pump evaporator 10 and the carbon dioxide evaporator 11, the reheater 9 is located at the rear ends of the carbon dioxide evaporator 11 and the heat pump evaporator 10, and the reheater 9 is located at the front ends of the first carbon dioxide air cooler 8, the second carbon dioxide air cooler 6 and the second condenser 7. Therefore, the air is cooled through the precooler 12 before being cooled, the saturation of moisture in the air is higher, and then after the water removal is completed, the heat absorbed by the precooler 12 from the air is recovered to the air through the heat regenerator 9, so that the air temperature is raised, and the water removal and temperature return effects of the air are better while no extra energy is wasted in the flowing process of the air.
Preferably, the precooler 12 and the reheater 9 are an upper air duct and a lower air duct communicated with the upper air duct respectively, and the upper air duct and the lower air duct are crossed to form a crossed air duct; the outer wall of the upper air duct and the outer wall of the lower air duct are mutually abutted at the intersection, and the carbon dioxide evaporator 11 and the heat pump evaporator 10 are arranged at the joint of the upper air duct and the lower air duct. In this way, air flows to the heat pump evaporator 10 and the carbon dioxide evaporator 11 through the upper air channel to be cooled and then is discharged through the lower air channel, and because the air in the lower air channel is cooled, temperature difference is generated between the air and the air in the upper air channel, and because the upper air channel and the lower air channel are crossed and mutually abutted to form a crossed air channel, the air in the upper air channel and the lower air channel can exchange heat in the crossed air channel; after the heat exchange is performed between the air in the upper air duct and the air in the lower air duct, the temperature of the air in the upper air duct is initially reduced before the air flows through the carbon dioxide evaporator 11 and the heat pump evaporator 10, and the temperature of the air in the lower air duct is raised before the air flows out.
The precooler 12 can also be an inner tube, a first air duct is arranged in the inner tube, the heat regenerator 9 is an outer tube sleeved outside the inner tube, a second air duct is formed between the outer wall of the inner tube and the inner wall of the outer tube, the tail end of the first air duct is communicated with the tail end of the second air duct, and the carbon dioxide evaporator 11 and the heat pump evaporator 10 are arranged at the joint of the upper air duct and the lower air duct.
The precooler 12 and the heat regenerator 9 can be selected as heat pipes comprehensively, the heat pipes comprise cooling sections and heat regeneration sections connected with the cooling sections, the cooling sections are positioned at the front ends of the carbon dioxide evaporator 11 and the heat pump evaporator 10, the heat regeneration sections are positioned at the rear ends of the carbon oxide evaporator 11 and the heat pump evaporator 10 and positioned at the front ends of the first carbon dioxide air cooler 8, the second carbon dioxide air cooler 6 and the second condenser 7, and the precooler 12 and the heat regenerator 9 can also be selected as square convection heat exchangers comprehensively.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical scope of the present invention, which can be directly or indirectly applied to other related technical fields without departing from the spirit of the present invention, are intended to be included in the scope of the present invention.
Claims (6)
1. The utility model provides a two refrigerant coupling high temperature drying system that contain carbon dioxide which characterized in that includes:
the drying room (1), wherein a return air duct is arranged in the drying room (1), the tail end of the return air duct is connected with at least one conventional outlet air duct and at least one condensation outlet air duct, the tail ends of the conventional outlet air duct and the condensation outlet air duct are communicated with the drying room (1), circulating fans (3) are arranged in the conventional outlet air duct and the condensation outlet air duct, and a heat exchanger (2) is arranged in the return air duct;
the first condenser (5), the said first condenser (5) is set up in the regular wind outlet duct;
the heat pump evaporator (10), the said heat pump evaporator (10) is set up in condensing the wind channel;
the carbon dioxide evaporator (11), the carbon dioxide evaporator (11) is arranged in the condensation air outlet duct;
a first carbon dioxide gas cooler (8), wherein the first carbon dioxide gas cooler (8) is arranged at the rear ends of the carbon dioxide evaporator (11) and the heat pump evaporator (10);
a second carbon dioxide gas cooler (6), wherein the second carbon dioxide gas cooler (6) is arranged at the rear end of the first carbon dioxide gas cooler (8);
the second condenser (7), the second condenser (7) is arranged at the rear end of the carbon dioxide evaporator (11) and the rear end of the heat pump evaporator (10);
the heat pump evaporator (10) is communicated with the first condenser (5), the second condenser (7) and the heat pump compressor (4) in sequence;
the carbon dioxide compressor (16), the carbon dioxide compressor (16) is communicated with the carbon dioxide evaporator (11), the first carbon dioxide gas cooler (8) and the second carbon dioxide gas cooler (6) in sequence;
the heat pump heat exchanger comprises a coupling heat exchanger (13), wherein two groups of refrigerant circulation channels which are mutually coupled and exchange heat are arranged in the coupling heat exchanger, two ends of one group of refrigerant circulation channels are respectively communicated with a carbon dioxide evaporator (11) and a first carbon dioxide air cooler (8), a carbon dioxide expansion valve (15) is arranged between the coupling heat exchanger (13) and the carbon dioxide evaporator (11), and two ends of the other group of refrigerant circulation channels are respectively communicated with a heat pump evaporator (10) and a heat pump compressor (4).
2. The system of claim 1, wherein the system comprises:
a precooler (12) and a heat regenerator (9) integrated with the precooler (12) are arranged in the condensation air outlet duct, the precooler (12) is positioned at the front ends of the heat pump evaporator (10) and the carbon dioxide evaporator (11), the heat regenerator (9) is positioned at the rear ends of the carbon dioxide evaporator (11) and the heat pump evaporator (10), and the heat regenerator (9) is positioned at the front ends of the first carbon dioxide air cooler (8), the second carbon dioxide air cooler (6) and the second condenser (7).
3. The system of claim 2, wherein the system comprises:
the precooler (12) and the heat regenerator (9) comprise an upper air duct and a lower air duct communicated with the upper air duct, and the upper air duct and the lower air duct are crossed to form a crossed air duct; the outer wall of the upper air duct and the outer wall of the lower air duct are mutually abutted at the intersection, and the carbon dioxide evaporator (11) and the heat pump evaporator (10) are arranged at the joint of the upper air duct and the lower air duct.
4. The system of claim 1, wherein the system comprises:
and a heat pump expansion valve (14) is arranged between the second condenser (7) and the heat pump evaporator (10).
5. The system of claim 1, wherein the system comprises:
the second condenser (7) is located between the first carbon dioxide gas cooler (8) and the second carbon dioxide gas cooler (6).
6. The system of claim 1, wherein the system comprises:
the heat pump evaporator (10) is positioned at the rear end of the carbon dioxide evaporator (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121224740.5U CN216347672U (en) | 2021-06-02 | 2021-06-02 | Double-refrigerant coupling high-temperature drying system containing carbon dioxide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121224740.5U CN216347672U (en) | 2021-06-02 | 2021-06-02 | Double-refrigerant coupling high-temperature drying system containing carbon dioxide |
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| CN216347672U true CN216347672U (en) | 2022-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325717A (en) * | 2022-10-14 | 2022-11-11 | 中国核动力研究设计院 | Heat exchange device and Brayton cycle system |
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2021
- 2021-06-02 CN CN202121224740.5U patent/CN216347672U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325717A (en) * | 2022-10-14 | 2022-11-11 | 中国核动力研究设计院 | Heat exchange device and Brayton cycle system |
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