CN216909784U - Cold drying machine - Google Patents
Cold drying machine Download PDFInfo
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- CN216909784U CN216909784U CN202122148862.7U CN202122148862U CN216909784U CN 216909784 U CN216909784 U CN 216909784U CN 202122148862 U CN202122148862 U CN 202122148862U CN 216909784 U CN216909784 U CN 216909784U
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Abstract
The utility model provides a cold dryer, which comprises: a refrigeration system and an air system; the air system includes: a shell-and-tube heat pipe heat exchanger, a gas-water separator, an oil removal filter and a dust removal filter; the shell-and-tube heat pipe exchanger is provided with an evaporation section and a condensation section; the evaporation section of the shell-and-tube heat pipe exchanger is connected with the inlet of the refrigeration system; the outlet of the refrigerating system is connected with the condensing section of the shell-and-tube heat pipe exchanger through the gas-water separator, the oil removing filter and the dust removing filter in sequence to form a closed loop. The utility model provides a cold dryer which can improve the temperature of compressed air after freeze drying through a heat recovery technology, thereby effectively solving the problem of condensation outside a conveying pipeline.
Description
Technical Field
The utility model relates to the technical field of air compression, in particular to a cold dryer.
Background
The air compressor belongs to the general equipment category, is the core equipment of a pneumatic system, has wide application range, and is essential key equipment in the industries of steel, electric power, metallurgy, shipbuilding, textile, electronics, chemical engineering, petroleum, mines, mechanical manufacturing, food and medicine, casting and spraying, automobile industry, aerospace and the like.
Since various impurities including water vapor and solid dust particles exist in air, the air is compressed by a compressor and contains a large amount of moisture and dust, and the dust can be filtered by a filter, but if the air containing moisture is directly used for equipment, instruments and the like, can cause considerable damage to the equipment, the instruments and the instruments, and the service life of the air is greatly shortened, so that a dryer is usually arranged at the rear end of the air compressor.
The freeze dryer adopts a refrigeration principle, cools compressed air to required dew point temperature, condenses gaseous water in the compressed air into liquid water, separates and discharges the liquid water through the gas-water separator, and finally obtains the compressed air with low moisture content, but the temperature of the compressed air can be reduced to be very low, the relative humidity is close to 100%, and the condensation condition is easy to occur outside a delivery pipeline of the compressed air. Therefore, it is necessary to provide a further solution to the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a cold dryer to overcome the defects in the prior art.
In order to achieve the above object of the present invention, the present invention provides a cooling and drying machine, which comprises: refrigeration and air systems;
the air system includes: a shell-and-tube heat pipe heat exchanger, a gas-water separator, an oil removal filter and a dust removal filter;
the shell-and-tube heat pipe exchanger is provided with an evaporation section and a condensation section; the evaporation section of the shell-and-tube heat pipe exchanger is connected with the inlet of the refrigerating system; the outlet of the refrigerating system is connected with the condensing section of the shell-and-tube heat pipe exchanger through the gas-water separator, the oil removing filter and the dust removing filter in sequence to form a closed loop.
As an improvement of the refrigeration dryer, the shell-and-tube heat pipe exchanger comprises: the heat exchanger comprises a heat exchanger shell, a middle partition plate and a plurality of heat pipes;
the middle partition plate is arranged in the heat exchanger shell, and the inner space of the heat exchanger shell is divided into a first heat exchange space and a second heat exchange space by the middle partition plate;
the heat pipes are arranged in parallel and extend into the second heat exchange space from the first heat exchange space through the middle partition plate;
the first heat exchange space corresponds to the evaporation section, and the second heat exchange space corresponds to the condensation section.
As an improvement of the refrigeration dryer, a hot fluid inlet and a hot fluid outlet which are communicated with the interior are arranged on the heat exchanger shell corresponding to the first heat exchange space, and a cold fluid inlet and a cold fluid outlet which are communicated with the interior are arranged on the heat exchanger shell corresponding to the second heat exchange space.
As an improvement of the cold dryer, the position of the heat pipe penetrating through the middle partition plate adopts an expansion pipe, or the heat pipe is connected with the middle partition plate in a welding mode.
As an improvement of the refrigeration dryer of the utility model, the first heat exchange space is provided with a plurality of guide plates, the guide plates are arranged in a staggered manner according to the flowing direction of the hot fluid, the hot fluid inlet is arranged on the upstream side of the guide plate at the head end in the flowing direction of the hot fluid, and the hot fluid outlet is arranged on the downstream side of the guide plate at the tail end in the flowing direction of the hot fluid.
As an improvement of the refrigeration dryer of the present invention, the second heat exchange space is provided with a plurality of flow deflectors, the plurality of flow deflectors are arranged in a staggered manner according to the flow direction of the cold fluid, the cold fluid inlet is arranged on the upstream side of the head end flow deflector in the flow direction of the cold fluid, and the cold fluid outlet is arranged on the downstream side of the tail end flow deflector in the flow direction of the cold fluid.
As an improvement of the refrigeration dryer, the refrigeration system comprises: the system comprises a refrigeration compressor, a refrigeration condenser, a thermal expansion valve and a refrigeration evaporator;
the refrigeration evaporator, the refrigeration compressor, the refrigeration condenser and the thermal expansion valve are sequentially connected to form a refrigeration loop, and the evaporation section of the shell-and-tube heat pipe exchanger is connected with the gas-water separator through the refrigeration evaporator.
Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a cold dryer which can improve the temperature of compressed air after freeze drying through a heat recovery technology, thereby effectively solving the problem of condensation outside a conveying pipeline.
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 embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is also possible for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the refrigeration dryer of the present invention.
Detailed Description
The present invention is described in detail below with reference to various embodiments, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should be able to make modifications and substitutions on the functions, methods, or structures of these embodiments without departing from the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a refrigeration dryer, which includes: a refrigeration system 200 and an air system 100.
The air system 100 receives compressed air containing moisture, oil, and dust from the air compressor, and returns the purified air to the air compressor.
The air system 100 includes: a shell-and-tube heat pipe exchanger 10, a gas-water separator 11, an oil removal filter 12 and a dust removal filter 13.
Through the shell-and-tube heat pipe exchanger 10, the high-temperature and high-pressure compressed air with the temperature of about 40 ℃ coming out from the air compressor exchanges heat with the clean low-temperature dry air with the temperature of about 5 ℃ cooled by the refrigeration evaporator, and the compressed air is precooled and cooled, so that the workload of the refrigeration evaporator can be reduced, and the energy consumption of the refrigeration system 200 can be reduced.
Specifically, a shell-and-tube heat pipe exchanger 10 includes: a heat exchanger shell 101, a middle partition plate 102 and a plurality of heat pipes 103.
The heat exchanger housing 101 is a cylindrical housing arranged in a transverse direction. Heat exchanger shell 101 is metallic structure, and can choose for use corresponding metal material according to different pressure and anticorrosive requirement to adapt to the heat exchange of high-pressure fluid, corrosive fluid.
The intermediate partition 102 is provided at an intermediate position of the heat exchanger case 101, and the internal space of the heat exchanger case 101 is partitioned into a first heat exchange space 1011 and a second heat exchange space 1012 by the intermediate partition 102. The first heat exchange space 1011 corresponds to the heat absorption evaporation section of the shell-and-tube heat pipe exchanger 10, and the second heat exchange space 1012 corresponds to the condensation section of the shell-and-tube heat pipe exchanger 10.
The evaporation section of the shell-and-tube heat pipe exchanger 10 is connected with the inlet of the refrigeration system 200; the outlet of the refrigerating system 200 is connected with the condensing section of the shell-and-tube heat pipe exchanger 10 through a gas-water separator 11, an oil removing filter 12 and a dust removing filter 13 in sequence to form a closed loop. The outlet of the refrigeration system 200 is connected with the condensing section of the shell-and-tube heat pipe exchanger 10 through a gas-water separator 11, an oil removal filter 12 and a dust removal filter 13 in sequence to form a closed loop.
The plurality of heat pipes 103 are located in the heat exchanger housing 101, and the plurality of heat pipes 103 are arranged in parallel and extend from the first heat exchanging space 1011 to the second heat exchanging space 1012 through the intermediate partition 102. In order to ensure that the first heat exchange space 1011 and the second heat exchange space 1012 are completely isolated and do not leak, the position where the heat pipe 103 penetrates through the intermediate partition plate 102 adopts expansion, or the heat pipe 103 is connected with the intermediate partition plate 102 by welding.
A hot fluid inlet and a hot fluid outlet which are communicated with the inside are formed in the heat exchanger shell 101 corresponding to the first heat exchange space 1011, and a cold fluid inlet and a cold fluid outlet which are communicated with the inside are formed in the heat exchanger shell 101 corresponding to the second heat exchange space 1012.
Therefore, hot fluid enters the heat exchanger from a hot fluid inlet on the left side of the heat exchanger shell 101, flows out of the heat exchanger from a hot fluid outlet after heat is released, cold fluid enters the heat exchanger from a cold fluid inlet on the right side of the heat exchanger shell 101, and flows out of the heat exchanger from a cold fluid outlet after heat is absorbed.
The heat pipe 103 is filled with a phase-change refrigerant, the refrigerant is evaporated and vaporized after being absorbed in the evaporation section, heat is transferred from the evaporation section to the condensation section, the refrigerant is liquefied into a liquid after being cooled in the condensation section, and the liquid is returned to the evaporation section along the inner wall of the heat pipe 103, so that the circulation process of phase-change heat transfer is completed. Because the heat pipe 103 is working, the internal refrigerant transfers heat through phase change, compared with the common dividing wall type heat exchanger transferring heat through heat conduction, the heat transfer quantity is larger, the heat exchange efficiency is higher, and the clean low-temperature dry air with the temperature of about 5 ℃ after the temperature of the evaporator is reduced can be heated to the temperature of more than 26 ℃ or higher.
Furthermore, a plurality of guide plates 104 are arranged inside the heat exchanger, so that heat can be fully absorbed and released between cold and hot fluid and the heat pipe 103. Specifically, in the first heat exchange space 1011, the plurality of guide plates 104 are arranged in a staggered manner according to the flowing direction of the hot fluid, the hot fluid inlet is arranged on the upstream side of the first end guide plate 104 in the flowing direction of the hot fluid, and the hot fluid outlet is arranged on the downstream side of the tail end guide plate 104 in the flowing direction of the hot fluid. In the second heat exchanging space 1012, the plurality of flow deflectors 104 are arranged in a staggered manner in the flowing direction of the cold fluid, the cold fluid inlet is arranged on the upstream side of the head end flow deflector 104 in the flowing direction of the cold fluid, and the cold fluid outlet is arranged on the downstream side of the tail end flow deflector 104 in the flowing direction of the cold fluid.
When the air system 100 works, compressed air which is discharged from an air compressor and contains moisture, oil and dust at about 40 ℃ enters an evaporation section of the shell-and-tube heat pipe exchanger 10, the compressed air is precooled, the temperature of the compressed air is reduced, a part of moisture is removed, the compressed air enters the refrigerating system 200, the compressed air is cooled to the dew point temperature of about 5 ℃, and the moisture, the oil and a part of impurities are condensed. The cooled gas, condensed water, oil and some impurities are separated by the gas-water separator 11, and the water and oil are discharged by the automatic drainer. The dried low-temperature compressed air is further filtered by an oil removal filter 12 and a dust removal filter 13 to become clean low-temperature dry air, and then enters a condensation section of the shell-and-tube heat pipe exchanger 10 to be heated, so that the clean low-temperature dry air is changed into dry compressed air at about 26 ℃ and is output.
The refrigeration system 200 includes: a refrigeration compressor 20, a refrigeration condenser 21, a thermostatic expansion valve 22, and a refrigeration evaporator 23.
Wherein, the refrigeration evaporator 23, the refrigeration compressor 20, the refrigeration condenser 21 and the thermal expansion valve 22 are sequentially connected to form a refrigeration loop, and the evaporation section of the shell-and-tube heat pipe exchanger 10 is connected with the gas-water separator 11 through the refrigeration evaporator 23.
Thus, the clean low-temperature dry air with the temperature of about 5 ℃ after the temperature of the evaporator is reduced absorbs the heat of the high-temperature high-pressure compressed air with the temperature of about 40 ℃ coming out from the air compressor, the temperature is increased to about 26 ℃, the high-temperature high-pressure compressed air is output, and the condensation phenomenon of the outside of the conveying pipeline can be prevented.
When the refrigeration system 200 works, the refrigerant is compressed by the refrigeration compressor 20 and then becomes high-temperature and high-pressure superheated steam, then is cooled by the refrigeration condenser 21, condensed and liquefied, throttled by the thermostatic expansion valve 22, reduced in pressure and cooled, and vaporized after absorbing heat in the refrigeration evaporator 23, and then the refrigerant becomes low-pressure and low-temperature vapor and enters the refrigeration compressor 20 to complete the refrigeration cycle.
In summary, the present invention provides a refrigeration dryer, which uses a heat recovery technology to raise the temperature of the compressed air after freeze drying, so as to effectively solve the problem of condensation on the outside of the conveying pipeline.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A freeze dryer, comprising: a refrigeration system and an air system;
the air system includes: a shell-and-tube heat pipe heat exchanger, a gas-water separator, an oil removal filter and a dust removal filter;
the shell-and-tube heat pipe exchanger is provided with an evaporation section and a condensation section; the evaporation section of the shell-and-tube heat pipe exchanger is connected with the inlet of the refrigeration system; the outlet of the refrigeration system is connected with the condensing section of the shell-and-tube heat pipe exchanger through the gas-water separator, the oil removal filter and the dust removal filter in sequence to form a closed loop;
the shell-and-tube heat pipe exchanger includes: the heat exchanger comprises a heat exchanger shell, a middle partition plate and a plurality of heat pipes;
the middle partition plate is arranged in the heat exchanger shell, and the inner space of the heat exchanger shell is divided into a first heat exchange space and a second heat exchange space by the middle partition plate;
the heat pipes are arranged in parallel and extend into the second heat exchange space from the first heat exchange space through the middle partition plate;
the first heat exchange space corresponds to an evaporation section, and the second heat exchange space corresponds to a condensation section;
the refrigeration system includes: the system comprises a refrigeration compressor, a refrigeration condenser, a thermal expansion valve and a refrigeration evaporator;
the refrigeration evaporator, the refrigeration compressor, the refrigeration condenser and the thermal expansion valve are sequentially connected to form a refrigeration loop, and the evaporation section of the shell-and-tube heat pipe exchanger is connected with the gas-water separator through the refrigeration evaporator.
2. The air dryer according to claim 1, wherein a hot fluid inlet and a hot fluid outlet communicated with the inside are arranged on the heat exchanger shell corresponding to the first heat exchange space, and a cold fluid inlet and a cold fluid outlet communicated with the inside are arranged on the heat exchanger shell corresponding to the second heat exchange space.
3. The cool dryer according to claim 1, wherein the position of the heat pipe penetrating the intermediate partition board adopts an expansion pipe, or the heat pipe and the intermediate partition board are connected by welding.
4. The cool dryer according to claim 1, wherein a plurality of baffles are disposed in the first heat exchanging space, the plurality of baffles are arranged in a staggered manner according to the flow direction of the hot fluid, the hot fluid inlet is disposed on the upstream side of the leading end baffle in the flow direction of the hot fluid, and the hot fluid outlet is disposed on the downstream side of the trailing end baffle in the flow direction of the hot fluid.
5. The cold dryer according to claim 1 or 4, wherein a plurality of flow deflectors are arranged in the second heat exchanging space, the flow deflectors are arranged in a staggered manner according to the flow direction of the cold fluid, the cold fluid inlet is arranged on the upstream side of the leading end flow deflector in the flow direction of the cold fluid, and the cold fluid outlet is arranged on the downstream side of the trailing end flow deflector in the flow direction of the cold fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122148862.7U CN216909784U (en) | 2021-09-07 | 2021-09-07 | Cold drying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122148862.7U CN216909784U (en) | 2021-09-07 | 2021-09-07 | Cold drying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216909784U true CN216909784U (en) | 2022-07-08 |
Family
ID=82222907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122148862.7U Active CN216909784U (en) | 2021-09-07 | 2021-09-07 | Cold drying machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216909784U (en) |
-
2021
- 2021-09-07 CN CN202122148862.7U patent/CN216909784U/en active Active
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