Drying system for reducing the water content of compressed air

Abstract

This utility model discloses a drying system for reducing the moisture content of compressed air, relating to the field of drying technology. Its main purpose is to integrate the structures of refrigerated drying equipment and adsorption drying equipment to reduce energy consumption. The main technical solution of this utility model is: a drying system for reducing the moisture content of compressed air, comprising: a first heat exchange tube in a precooler, a second heat exchange tube in an evaporator, an outlet of a steam-water separator connected to the inlet of the first heat exchange tube, and the outlet of the first heat exchange tube connected to the inlets of the first and second adsorption towers respectively; a casing, a fan and a cooling coil arranged sequentially within the casing, the outlet of the cooling coil connected to the inlet of a compressor, the outlet of the compressor connected to the inlet of the second heat exchange tube, the outlet of the second heat exchange tube connected to the inlet of the cooling coil, the outlet of the casing connected to the inlet of a heater, and the outlet of the heater connected to the outlets of the first and second adsorption towers respectively.

Description

Technical Field

[0001] This utility model relates to the field of drying technology, and in particular to a drying system for reducing the moisture content of compressed air. Background Technology

[0002] In many industrial applications, compressors are used in compressed air supply systems. This compressed air often contains a certain amount of moisture. Excessive moisture can not only affect the performance of the compressor, but may also cause corrosion of pipes, valves and other equipment, shorten the service life of the equipment, and may even affect the normal operation of downstream processes.

[0003] Most air drying devices on the market currently use refrigeration drying and adsorption drying. In existing technology, the two types of equipment use different principles and require relatively independent mechanical structures to operate, resulting in high energy consumption. There is a possibility of structural integration to reduce energy consumption. Utility Model Content

[0004] In view of this, the present invention provides a drying system for reducing the moisture content of compressed air, the main purpose of which is to integrate the structures of refrigerated drying equipment and adsorption drying equipment to reduce energy consumption.

[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0006] This utility model provides a drying system for reducing the moisture content of compressed air, the system comprising: a main body and a refrigeration mechanism;

[0007] The main body includes a precooler, an evaporator, and a steam-water separator connected in sequence. The precooler is provided with a first heat exchange tube, the evaporator is provided with a second heat exchange tube, the outlet of the steam-water separator is connected to the inlet of the first heat exchange tube, and the outlet of the first heat exchange tube is connected to the inlet of the first adsorption tower and the inlet of the second adsorption tower, respectively.

[0008] The refrigeration mechanism includes a compressor, a housing, a fan and a cooling coil arranged sequentially within the housing. The outlet of the cooling coil is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the second heat exchange tube, the outlet of the second heat exchange tube is connected to the inlet of the cooling coil, the outlet of the housing is connected to the inlet of the heater, and the outlet of the heater is connected to the outlet of the first adsorption tower and the outlet of the second adsorption tower, respectively.

[0009] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0010] Optionally, the steam-water separator includes a shell and a central tube vertically disposed within the shell. The central tube is surrounded by an annular buckle plate, and multiple baffles are arranged alternately inside the central tube. The outlet of the evaporator is connected to the lower end of the central tube, and the upper outlet of the shell is connected to the inlet of the first heat exchange tube.

[0011] Optionally, it also includes a first drain pipe, one end of which is connected to the lower end of the housing surrounding the central pipe, and the first drain pipe is equipped with a first drain valve.

[0012] Optionally, it also includes an inverted U-shaped tube, one end of which is connected to the lower end of the precooler and the other end of which is connected to the lower end of the evaporator, and the upper outlet of the evaporator is connected to the lower end of the central tube.

[0013] Optionally, it also includes a water receiving tank, one side of the upper end of which is connected to the lower end of the precooler and the lower end of the evaporator, and the other side of the upper end of the water receiving tank is connected to a pressure relief valve.

[0014] Optionally, it may also include a plurality of first baffles and a plurality of second baffles, the plurality of first baffles and the plurality of second baffles being arranged alternately in the water receiving tank to form a baffle channel in the upper space of the water receiving tank.

[0015] Optionally, it also includes a first spiral plate and a second spiral plate, wherein the first heat exchange tube and the second heat exchange tube are baffles, the straight section of the first heat exchange tube extends along the axial direction of the precooler, the straight section of the second heat exchange tube extends along the axial direction of the evaporator, the first spiral plate is axially disposed inside the precooler, and the second spiral plate is axially disposed inside the evaporator.

[0016] Optionally, it also includes a level gauge, which is connected to the side wall of the water receiving tank, and the lower end of the water receiving tank is connected to a drain valve.

[0017] Optionally, a second drain pipe is also included, one end of which is connected to the lower end of the central pipe, and a second drain valve is installed on the second drain pipe.

[0018] Optionally, the other end of the first drain pipe and the other end of the second drain pipe are respectively connected to the top wall of the water receiving tank.

[0019] By employing the above technical solution, this utility model has at least the following advantages:

[0020] Compressed air flows sequentially through a precooler, evaporator, steam-water separator, and first heat exchange tube, and then through the first or second adsorption tower. During this process, the compressor of the refrigeration unit drives the refrigerant to flow back and forth through the second heat exchange tube, absorbing heat from the compressed air and cooling the moisture in the liquefied air. When the refrigerant flows through the cooling coil, it releases heat, raising the temperature of the air flowing inside the casing. The air then flows through the heater, and the heated air flows through the first or second adsorption tower that needs to be desorbed.

[0021] Through the above process, on the one hand, the heat of the refrigerant is released, and on the other hand, the air entering the heater is preheated, reducing the load on the heater. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a drying system for reducing the moisture content of compressed air, provided as an embodiment of the present invention.

[0023] The reference numerals in the accompanying drawings include: precooler 1, evaporator 2, steam-water separator 3, first heat exchange tube 4, second heat exchange tube 5, first adsorption tower 6, second adsorption tower 7, compressor 8, casing 9, fan 10, cooling coil 11, heater 12, drain valve 13, shell 301, central tube 302, annular buckle plate 303, first drain pipe 304, inverted U-shaped pipe 14, water receiving tank 15, pressure relief valve 16, first baffle plate 17, second baffle plate 18, first spiral plate 19, second spiral plate 20, level gauge 21, drain valve 22, and second drain pipe 305. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, one embodiment of the present invention provides a drying system for reducing the moisture content of compressed air, which includes: a main body and a refrigeration mechanism;

[0027] The main body includes a precooler 1, an evaporator 2 and a steam-water separator 3 connected in sequence. The precooler 1 is provided with a first heat exchange tube 4, the evaporator 2 is provided with a second heat exchange tube 5, the outlet of the steam-water separator 3 is connected to the inlet of the first heat exchange tube 4, and the outlet of the first heat exchange tube 4 is connected to the inlet of the first adsorption tower 6 and the inlet of the second adsorption tower 7 respectively.

[0028] The refrigeration mechanism includes a compressor 8, a housing 9, a fan 10 and a cooling coil 11 arranged sequentially inside the housing 9. The outlet of the cooling coil 11 is connected to the inlet of the compressor 8, the outlet of the compressor 8 is connected to the inlet of the second heat exchange tube 5, the outlet of the second heat exchange tube 5 is connected to the inlet of the cooling coil 11, the outlet of the housing 9 is connected to the inlet of the heater 12, and the outlet of the heater 12 is connected to the outlet end of the first adsorption tower 6 and the outlet end of the second adsorption tower 7, respectively.

[0029] The working process of a drying system that reduces the moisture content of compressed air is as follows:

[0030] Compressed air flows sequentially through precooler 1, evaporator 2, steam-water separator 3 and first heat exchange tube 4, and then through first adsorption tower 6 or second adsorption tower 7, undergoing cooling drying and adsorption drying in sequence. During the above process, compressor 8 of the refrigeration unit drives refrigerant to flow back and forth through second heat exchange tube 5, absorbing heat from the compressed air and cooling the moisture in the liquefied air. When the refrigerant flows through cooling coil 11, it releases heat, raising the temperature of the flowing air inside casing 9. Then it flows through heater 12, and the heated air flows through first adsorption tower 6 or second adsorption tower 7 that needs to be desorbed.

[0031] Through the above process, on the one hand, the heat of the refrigerant is released, and on the other hand, the air before entering the heater 12 is preheated, reducing the load on the heater 12.

[0032] Specifically, the heater 12 includes an insulation shell and an electric heating wire disposed inside the insulation shell to heat the air flowing through the insulation shell, thereby meeting the drying requirements of the desiccant in the adsorption tower.

[0033] Specifically, the direction of extension from the inlet of housing 9 to the outlet of housing 9 is the first direction. The fan 10 and the cooling coil 11 are arranged in sequence along the first direction. The outlet end of housing 9 has a conical interface, which is connected to the inlet of heater 12 to facilitate the flow of air and reduce the loss of air kinetic energy inside housing 9.

[0034] Specifically, the inlet end of the first adsorption tower 6 and the inlet end of the second adsorption tower 7 are respectively connected to the discharge pipe, and the discharge pipe is equipped with a discharge valve 13.

[0035] In a specific embodiment, the steam-water separator 3 includes a housing 301 and a central tube 302 vertically disposed within the housing 301. An annular buckle plate 303 is provided around the central tube 302. Multiple baffles are arranged alternately inside the central tube 302. The outlet of the evaporator 2 is connected to the lower end of the central tube 302, and the upper outlet of the housing 301 is connected to the inlet of the first heat exchange tube 4.

[0036] In this embodiment, specifically, the air that has been condensed and cooled by the evaporator 2 enters the central tube 302, rises and is deflected in the central tube 302, and due to the guiding effect of the annular buckle plate 303, the air overflowing from the upper end of the central tube 302 is deflected downwards and then upwards to the upper outlet of the shell 301, reaching the first heat exchange tube 4.

[0037] Through the above process, gas-liquid separation is achieved. At the same time, the dehumidified air flows through the first heat exchange tube 4, which lowers the temperature of the compressed air entering the precooler 1 in advance, making full use of the cooling capacity of the dehumidified air.

[0038] Specifically, the annular buckle plate 303 includes an annular baffle and a dome cover plate fixedly connected to the upper end of the annular baffle, so that the air overflowing from the central pipe 302 will flow back again in the space surrounding the central pipe 302, ensuring sufficient gas-liquid separation.

[0039] In a specific embodiment, it also includes a first drain pipe 304, one end of which is connected to the lower end of the housing 301 surrounding the central pipe 302, and a first drain valve is installed on the first drain pipe 304.

[0040] In this embodiment, specifically, the first drain valve is an electromagnetic valve, which is controlled by a PLC controller to open periodically to discharge the condensate deposited in the housing 301.

[0041] In a specific embodiment, an inverted U-shaped tube is also included. One end of the inverted U-shaped tube is connected to the lower end of the precooler 1, and the other end is connected to the lower end of the evaporator 2. The upper outlet of the evaporator 2 is connected to the lower end of the central tube 302.

[0042] In this embodiment, the precooler 1 and the evaporator 2 are arranged side by side, with the same height. The U-shaped bend of the inverted U-shaped tube is higher than the two ends of the inverted U-shaped tube. This prevents condensate from entering the inverted U-shaped tube from the bottom of the precooler 1 and the bottom of the evaporator 2, thus avoiding water seal. This allows the air in the precooler 1 to enter the evaporator 2 through the inverted U-shaped tube.

[0043] In a specific embodiment, a water receiving tank 15 is also included. One side of the upper end of the water receiving tank 15 is connected to the lower end of the precooler 1 and the lower end of the evaporator 2, respectively, and the other side of the upper end of the water receiving tank 15 is connected to the pressure relief valve 16.

[0044] In this embodiment, specifically, the water in the lower part of the precooler 1 and the lower part of the evaporator 2 settles into the water receiving tank 15. When the liquid level in the water receiving tank 15 is high, causing the gas pressure in the water receiving tank 15 to be too high, the pressure relief valve 16 automatically opens to discharge the high-pressure gas in the water receiving tank 15, ensuring that the condensate in the condenser and evaporator 2 can settle smoothly into the water receiving tank 15.

[0045] Specifically, the pressure relief valve 16 is a spring-loaded safety valve.

[0046] In a specific embodiment, it also includes a plurality of first baffles 17 and a plurality of second baffles 18, which are arranged alternately in the water receiving tank 15 to form a baffle channel in the upper space of the water receiving tank 15.

[0047] In this embodiment, specifically, in the upper space of the water receiving tank 15, a plurality of first baffles 17 and a plurality of second baffles 18 are arranged alternately. The upper end of the first baffle 17 is fixedly connected to the top wall of the water receiving tank 15, and there is a gap between the upper end of the second baffle 18 and the top wall of the water receiving tank 15. In this way, after a certain amount of condensate is stored in the water receiving tank 15, the upper space of the water receiving tank 15 forms a baffle channel, which facilitates the release of ultra-high pressure air from the water receiving tank 15 while allowing as much water vapor as possible to condense and liquefy.

[0048] Specifically, there is also a gap between the lower end of the second baffle plate 18 and the bottom wall of the water receiving tank 15, so that the lower space of the water receiving tank 15 is a continuous space, thus making the liquid level in the water receiving tank 15 uniform.

[0049] In a specific embodiment, it also includes a first spiral plate 19 and a second spiral plate 20, a first heat exchange tube 4 and a second heat exchange tube 5 respectively, a straight section of the first heat exchange tube 4 extends along the axial direction of the precooler 1, a straight section of the second heat exchange tube 5 extends along the axial direction of the evaporator 2, the first spiral plate 19 is axially disposed in the precooler 1, and the second spiral plate 20 is axially disposed in the evaporator 2.

[0050] In this embodiment, specifically, due to the presence of the first spiral plate 19 and the second spiral, an axial spiral channel is formed in the precooler 1 and the evaporator 2. Air spirals upward or downward in the spiral channel, so that the air can be evenly diffused in the radial cross section, thereby allowing the air to fully receive the cooling capacity transferred by the first heat exchange tube 4 and the second heat exchange tube 5.

[0051] In a specific embodiment, a level gauge 21 is also included, which is connected to the side wall of the water receiving tank 15, and the lower end of the water receiving tank 15 is connected to the drain valve 22.

[0052] In this embodiment, specifically, the level gauge 21 is a float level gauge 21. The operator can observe the high level in the water receiving tank 15 through the level gauge 21, which makes it easier to open the drain valve 22 to drain the condensate in the water receiving tank 15.

[0053] In a specific embodiment, a second drain pipe 305 is also included. One end of the second drain pipe 305 is connected to the lower end of the central pipe 302, and a second drain valve is installed on the second drain pipe 305.

[0054] In this embodiment, specifically, the second drain valve is a solenoid valve. Inside the central tube 302, air flows from bottom to top. To prevent condensate from accumulating at the bottom of the central tube 302, the operator can set the opening time period of the second drain valve through the PLC controller; or a pressure sensor can be installed on the pipe wall between the evaporator 2 and the central tube 302. When the pressure sensor detects that the pressure exceeds the set value, the second drain valve is opened to drain the condensate at the bottom of the central tube 302, ensuring smooth airflow between the evaporator 2 and the central tube 302.

[0055] In a specific embodiment, the other end of the first drain pipe 304 and the other end of the second drain pipe 305 are respectively connected to the top wall of the water receiving tank 15.

[0056] In this embodiment, the first drain pipe 304 and the second drain pipe 305 are respectively connected to the water receiving tank 15 to facilitate the collection of condensate discharged from the steam-water separator 3 and maintain a clean and dry environment at the equipment site.

[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A drying system for reducing the moisture content of compressed air, characterized in that, include: The main body includes a precooler, an evaporator, and a steam-water separator connected in sequence. The precooler is provided with a first heat exchange tube, the evaporator is provided with a second heat exchange tube, the outlet of the steam-water separator is connected to the inlet of the first heat exchange tube, and the outlet of the first heat exchange tube is connected to the inlet of the first adsorption tower and the inlet of the second adsorption tower, respectively. The refrigeration mechanism includes a compressor, a housing, a fan and a cooling coil arranged sequentially within the housing. The outlet of the cooling coil is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the second heat exchange tube, the outlet of the second heat exchange tube is connected to the inlet of the cooling coil, the outlet of the housing is connected to the inlet of the heater, and the outlet of the heater is connected to the outlet ends of the first adsorption tower and the second adsorption tower, respectively.

2. The drying system for reducing the moisture content of compressed air according to claim 1, characterized in that, The steam-water separator includes a shell and a central tube vertically disposed within the shell. An annular buckle plate is provided around the central tube, and multiple baffles are arranged alternately inside the central tube. The outlet of the evaporator is connected to the lower end of the central tube, and the upper outlet of the shell is connected to the inlet of the first heat exchange tube.

3. The drying system for reducing the moisture content of compressed air according to claim 2, characterized in that, It also includes a first drain pipe, one end of which is connected to the lower end of the housing surrounding the central pipe, and the first drain pipe is equipped with a first drain valve.

4. The drying system for reducing the moisture content of compressed air according to claim 2, characterized in that, It also includes an inverted U-shaped tube, one end of which is connected to the lower end of the precooler and the other end of which is connected to the lower end of the evaporator. The upper outlet of the evaporator is connected to the lower end of the central tube.

5. The drying system for reducing the moisture content of compressed air according to claim 3, characterized in that, It also includes a water receiving tank, one side of the upper end of which is connected to the lower end of the precooler and the lower end of the evaporator, and the other side of the upper end of the water receiving tank is connected to a pressure relief valve.

6. The drying system for reducing the moisture content of compressed air according to claim 5, characterized in that, It also includes multiple first baffles and multiple second baffles, which are arranged alternately in the water receiving tank to form a baffle channel in the upper space of the water receiving tank.

7. The drying system for reducing the moisture content of compressed air according to claim 1, characterized in that, It also includes a first spiral plate and a second spiral plate. The first heat exchange tube and the second heat exchange tube are baffles. The straight section of the first heat exchange tube extends along the axial direction of the precooler, and the straight section of the second heat exchange tube extends along the axial direction of the evaporator. The first spiral plate is axially disposed inside the precooler, and the second spiral plate is axially disposed inside the evaporator.

8. The drying system for reducing the moisture content of compressed air according to claim 5, characterized in that, It also includes a level gauge, which is connected to the side wall of the water receiving tank, and the lower end of the water receiving tank is connected to a drain valve.

9. The drying system for reducing the moisture content of compressed air according to claim 5, characterized in that, It also includes a second drain pipe, one end of which is connected to the lower end of the central pipe, and the second drain pipe is equipped with a second drain valve.

10. The drying system for reducing the moisture content of compressed air according to claim 9, characterized in that, The other end of the first drain pipe and the other end of the second drain pipe are respectively connected to the top wall of the water receiving tank.

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