Dehumidifying and drying steam unit and method

Abstract

The invention provides a dehumidifying and drying steam unit, which is used for dehumidifying and drying gas required by external energy consumption equipment, and comprises a first internal pipeline and a second internal pipeline which are respectively provided with a gas inlet and a gas outlet, the first internal pipeline and the second internal pipeline are arranged in parallel, and an air outlet of the first internal pipeline is communicated with an air inlet of the second internal pipeline; the fin condenser is arranged in the second internal pipeline and used for heating the dehumidified and dried air; the fin evaporator is arranged in the first internal pipeline and used for cooling and condensing the air to be dehumidified and dried; one part of the heat exchanger is arranged in the first internal pipeline, the other part of the heat exchanger is arranged in the second internal pipeline, and the heat exchanger is used for transferring one part of heat in the air to be dehumidified and dried in the first internal pipeline into the second internal pipeline; in the air flowing direction, the heat exchanger and the fin evaporator are sequentially arranged in the first internal pipeline, and the heat exchanger and the fin condenser are sequentially arranged in the second internal pipeline.

Description

Technical Field

[0001] The present invention relates to the field of dehumidification and drying, and in particular to a dehumidification and drying steam unit and method. Background Art

[0002] During the papermaking process, high-temperature steam is continuously introduced into the paper machine drum. The drum transfers heat to its surface through heat conduction, drying the paper in close contact with the drum. As the drying process progresses, moisture evaporates and accumulates within the enclosed cavity between the drum and the paper, significantly increasing the humidity within the cavity. To maintain an efficient drying environment, dry air must be continuously introduced into this cavity. Through displacement and convection, the moist air is promptly expelled, ensuring that the drying system maintains optimal humidity conditions, guaranteeing paper drying quality and production efficiency.

[0003] However, the exhausted humid air still contains a lot of heat, which will cause heat waste if it is directly discharged into the outside air. Summary of the Invention

[0004] The main purpose of the present invention is to provide a dehumidification and drying steam unit and method, which can recover the heat of the moist air discharged from the energy-consuming equipment and dry the moist air at the same time.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a dehumidifying and drying steam unit for dehumidifying and drying the gas required by external energy-consuming equipment, comprising:

[0006] The first internal pipe and the second internal pipe each have an air inlet and an air outlet, the first internal pipe and the second internal pipe are arranged in parallel, and the air outlet of the first internal pipe is connected to the air inlet of the second internal pipe;

[0007] a fin condenser, disposed inside the second internal pipe, for heating the dehumidified and dried air;

[0008] The finned evaporator is arranged inside the first internal pipe and is used to cool and condense the air to be dehumidified and dried;

[0009] a heat exchanger, a portion of which is disposed in the first inner pipe and the other portion of which is disposed in the second inner pipe, for transferring a portion of the heat in the air to be dehumidified and dried in the first inner pipe to the second inner pipe;

[0010] Along the flow direction of the air, a heat exchanger and a fin evaporator are sequentially arranged in the first internal pipe, and a heat exchanger and a fin condenser are sequentially arranged in the second internal pipe.

[0011] Preferably, it also includes:

[0012] The gas-liquid separator has a first inlet, a first refrigerant outlet, and a second refrigerant outlet. Refrigerants in different states can enter from the first inlet, and the gas-liquid separator can separate the refrigerant into gaseous refrigerant and liquid refrigerant. The second refrigerant outlet is connected to the refrigerant inlet of the finned condenser through a pipeline;

[0013] The condensing evaporator has a primary refrigerant inlet, a primary refrigerant outlet, a secondary refrigerant inlet and a secondary refrigerant outlet. The primary refrigerant inlet is connected to the primary refrigerant outlet, and the secondary refrigerant inlet is connected to the secondary refrigerant outlet. The first refrigerant outlet of the gas-liquid separator is connected to the primary refrigerant inlet through an expansion valve, and the refrigerant outlet of the fin condenser is connected to the secondary refrigerant inlet through a pipeline.

[0014] Preferably, the system further comprises: a compressor having a refrigerant inlet and a refrigerant outlet, wherein the compressor contains both refrigerant 1 and refrigerant 2, the boiling point of refrigerant 1 being higher than that of refrigerant 2, and the primary refrigerant outlet of the condenser evaporator and the refrigerant outlet of the finned evaporator being connected to the refrigerant inlet of the compressor;

[0015] a condenser, the condenser having a refrigerant inlet, a refrigerant outlet, a first water inlet, and a first water outlet, the refrigerant inlet of the condenser being connected to the refrigerant outlet of the compressor via a pipeline, and the refrigerant outlet of the condenser being connected to the first inlet;

[0016] The flash tank, the first water inlet of the condenser is connected to a position near the bottom of the flash tank through a pipeline, and the first water outlet of the condenser is connected to a position near the top of the flash tank through a pipeline.

[0017] Preferably, a venturi ejector is also included, the gas outlet end of the flash tank is connected to the suction port of the venturi ejector through a first steam pipe, the high-pressure inlet of the venturi ejector is connected to the steam source, and the outlet of the venturi ejector is connected to the energy-consuming equipment.

[0018] Preferably, the energy-consuming device is connected to the air inlet of the first internal pipe through a first air duct, and is connected to the air outlet of the second internal pipe through a second air duct.

[0019] Preferably, the heat exchanger adopts a heat exchange core, the cross-section of the heat exchange core is square, and has an air inlet 1, an air outlet 1, an air inlet 2 and an air outlet 2. The air inlet 1 is connected to the air outlet 1 and is located on the opposite surface of the square, the air inlet 2 is connected to the air outlet 2 and is located on the other opposite surface of the square, the first internal pipe and the second internal pipe are arranged in parallel, the first internal pipe is divided into a first part and a second part by a partition, and the second internal pipe is divided into a third part and a fourth part by a partition, the first part is the inlet of the first internal channel, the fourth part is the outlet of the second internal channel, the other part of the first internal channel is the second part, the other part of the second internal channel is the third part, and the second part is connected to the third part, the air inlet 1 is located in the first part, the air outlet 1 is located in the third part, the air inlet 2 is located in the second part, and the air outlet 2 is located in the fourth part. The gas entering from the inlet of the first internal channel passes through the air inlet 1, the air outlet 1, the fin evaporator, the air inlet 2, the air outlet 2, and the fin condenser in sequence.

[0020] The present invention also provides a dehumidification and drying method, which uses the above-mentioned dehumidification and drying steam unit and specifically includes the following steps:

[0021] Step 1: The high-temperature and high-pressure gaseous refrigerant 1 and refrigerant 2 from the compressor enter the condenser and perform heat exchange with the water in the flash tank in the condenser, heating the water in the flash tank. Refrigerant 1 becomes liquid, while refrigerant 2 remains in gaseous state.

[0022] Step 2: Refrigerant 1 and refrigerant 2 coming out of the condenser enter the gas-liquid separator, where they are separated.

[0023] Step 3: Refrigerant 1 from the first refrigerant outlet of the gas-liquid separator passes through the first expansion valve and enters the condenser evaporator from the primary refrigerant inlet of the condenser evaporator. Refrigerant 2 from the second refrigerant outlet of the gas-liquid separator enters the fin condenser, and the fin condenser heats the dry air passing through it.

[0024] Step 4: The refrigerant 2 coming out of the finned condenser enters the condenser evaporator through the secondary refrigerant inlet of the condenser evaporator. The refrigerant 2 and the refrigerant 1 perform heat exchange in the condenser evaporator, the refrigerant 2 is cooled, and the refrigerant 1 is heated;

[0025] Step 5: The refrigerant 2 from the secondary refrigerant outlet of the condenser evaporator enters the finned evaporator through the second expansion valve. The finned evaporator cools the humid air in the first internal pipe, and the water vapor in the humid air condenses to achieve drying.

[0026] Step 6: The refrigerant coming out of the finned evaporator enters the compressor, and refrigerant 1 and refrigerant 2 enter the next cycle;

[0027] Step 7: The humid air from the energy-consuming equipment enters the first internal pipe through the first air duct, and passes through the heat pipe heat exchanger and the fin condenser in sequence. The humid air is cooled for the first time when passing through the heat pipe heat exchanger. The heat pipe heat exchanger transfers part of the heat from the first internal pipe to the second internal pipe. The humid air is cooled again when passing through the fin evaporator. The water vapor in the humid air is condensed into water, thereby drying the humid air and turning it into dry air.

[0028] Step 8: The dry air enters the second internal pipe and passes through the heat pipe heat exchanger, the finned condenser, and enters the energy-consuming equipment through the second air duct. The dry air is heated for the first time when passing through the heat pipe heat exchanger and for the second time when passing through the finned condenser.

[0029] Step 9: The steam generated in the flash tank enters the venturi ejector through the first steam pipe and is mixed with the high-temperature and high-pressure steam from the steam source and then enters the energy-consuming equipment. After use, the high-temperature and high-pressure steam is carried out by dry air.

[0030] Steps 1 to 9 can be performed simultaneously.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1) The present invention can dry and heat the moist air from the energy-consuming equipment, while recovering a portion of the heat in the moist air, thereby realizing partial heat recovery;

[0033] 2) The unit uses part of the absorbed heat to heat the water in the flash tank. The flash tank can generate steam and input it into the energy-consuming equipment, so as to achieve closed-loop energy recovery as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a principle diagram of embodiment 1 of the present invention;

[0035] Figure 2 It is a principle diagram of embodiment 2 of the present invention. DETAILED DESCRIPTION

[0036] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0037] Example 1

[0038] The dehumidification and drying steam unit is used to dehumidify and dry gas required by external energy-consuming equipment. It includes a compressor 1, a condenser-evaporator 3, a heat pipe heat exchanger 4, a finned evaporator 5, a finned condenser 8, a first expansion valve 6, a second expansion valve 7, a gas-liquid separator 9, a condenser 13, and a flash tank 16. The compressor 1 is used to compress low-temperature, low-pressure refrigerant to high-temperature, high-pressure refrigerant. The compressor 1 is provided with a refrigerant inlet and a refrigerant outlet. The condenser 13 has a refrigerant inlet, a refrigerant outlet, a first water inlet, and a first water outlet. The refrigerant inlet of the condenser 13 is connected to the refrigerant outlet of the compressor 1 via a pipe. The first water inlet of the condenser 13 is connected to a position near the bottom of the flash tank 16 via a pipe, and the first water outlet is connected to a position near the top of the flash tank 16 via a pipe. The high-temperature, high-pressure refrigerant exiting the compressor 1 undergoes heat exchange with water in the condenser 13, heating the water in the flash tank 16. The low-pressure steam from the flash tank 16 is input into the energy-consuming equipment 20 via a first steam pipe 27. Specifically, there are two types of refrigerants. For ease of description, the two refrigerants are referred to as refrigerant 1 and refrigerant 2. Refrigerant 1 and refrigerant 2 exiting compressor 1 are both high-temperature, high-pressure gases. After entering condenser 13, refrigerant 1 undergoes heat exchange, becoming a high-temperature, high-pressure liquid refrigerant. The two refrigerants then enter gas-liquid separator 9 together. The boiling point of refrigerant 1 is higher than that of refrigerant 2.

[0039] The gas-liquid separator 9 has a first inlet, a first refrigerant outlet, and a second refrigerant outlet. The refrigerant outlet of the condenser 13 is connected to the first inlet via a pipeline. The condenser evaporator 3 has a primary refrigerant inlet, a primary refrigerant outlet, a secondary refrigerant inlet, and a secondary refrigerant outlet. The first refrigerant outlet is connected to the primary refrigerant inlet via a pipeline. Refrigerant 1 and refrigerant 2 entering the gas-liquid separator are separated into gas and liquid in the gas-liquid separator, and liquid refrigerant 1 enters the condenser evaporator 3 through the first refrigerant outlet. A first expansion valve 6 is provided on the pipeline connecting the first refrigerant outlet and the primary refrigerant inlet. Refrigerant 1 is throttled and depressurized by passing through the first expansion valve 6.

[0040] The primary refrigerant outlet of the condenser evaporator 3 is connected to the refrigerant inlet of the compressor 1 through a pipeline, and the refrigerant flowing out of the primary refrigerant outlet returns to the compressor 1.

[0041] The energy-consuming equipment targeted by this invention is primarily a papermaking machine. During operation, the internal drum of a papermaking machine reels in damp paper. High-temperature, high-pressure steam is fed into the drum to heat the damp paper. Dry air is circulated to remove the internal water vapor, thereby achieving drying and dehumidification. The energy-consuming equipment is provided with an outlet for outputting damp air, a first air inlet for receiving dry air, and a second air inlet for receiving high-temperature, high-pressure steam.

[0042] The dehumidifying and drying steam unit also includes a first internal pipe 22 and a second internal pipe 23. The air inlet of the first internal pipe 22 is connected to the air outlet on the energy-consuming equipment through the first air duct 17, and the air outlet of the second internal pipe 23 is connected to the first air inlet of the energy-consuming equipment through the second air duct 19. The first internal pipe 22 and the second internal pipe 23 are arranged in parallel and the air outlet of the first internal pipe 22 is connected to the air inlet of the second internal pipe 23. The fin condenser 8 is arranged inside the second internal pipe 23, and the fin evaporator 5 is arranged inside the first internal pipe 22. A part of the heat pipe exchanger 4 is arranged in the first internal pipe 22, and the other part is arranged in the second internal pipe 22. In the first internal pipe 22, the heat pipe exchanger 4 and the fin evaporator 5 are arranged in sequence along the direction of gas flow. In the second internal pipe 22, the heat pipe exchanger 4 and the fin condenser 8 are arranged in sequence along the direction of gas flow. Moist air exiting the energy-consuming equipment passes through the first air duct 17 into the first internal conduit 22, then sequentially through the heat pipe heat exchanger 4 and the finned evaporator 5 before entering the second internal conduit 23. Within the second internal conduit 23, the air passes through the heat pipe heat exchanger 4 and the finned condenser 8. The dry air exiting the second internal conduit 23 enters the energy-consuming equipment through the second air duct 19. The moist air exiting the energy-consuming equipment has a relatively high temperature and humidity. When passing through the heat pipe heat exchanger 4, it transfers some heat from the first internal conduit 22 to the second internal conduit 23. Passing through the finned evaporator 5, the air is further cooled. The lower temperature condenses water vapor in the air, thereby drying the air. When the dried air enters the second internal conduit 23, it is heated for the first time by passing through the heat pipe heat exchanger 4 and for the second time by passing through the finned condenser 8. The higher-temperature dry air then enters the energy-consuming equipment 20, and the used air re-enters the first air duct 17 for circulation.

[0043] A fan 26 is provided at the connection between the second internal duct 23 and the second air duct 19 , and the fan 26 can make the air flow at a predetermined speed.

[0044] The second refrigerant outlet of gas-liquid separator 9 is connected to the refrigerant inlet of finned condenser 8 via a pipe. The gaseous refrigerant 2 separated in gas-liquid separator 9 enters finned condenser 8, where it is converted into a high-temperature, high-pressure liquid refrigerant. The refrigerant outlet of finned condenser 8 is connected to the secondary refrigerant inlet of condenser evaporator 3 via a pipe. The secondary refrigerant outlet of condenser evaporator 3 is connected to the refrigerant inlet of finned evaporator 5 via a pipe. Refrigerant 1 and refrigerant 2 exchange heat in condenser evaporator 3, reducing the temperature of refrigerant 2 and increasing the temperature of refrigerant 1. After entering finned evaporator 5, refrigerant 2 cools the humid air in first internal pipe 22, condensing the water vapor in the humid air. This increases the temperature of refrigerant 2 within finned evaporator 5 to a certain extent. The refrigerant outlet of finned evaporator 5 is connected to the refrigerant inlet of compressor 1 via a pipe. Refrigerant 1 and refrigerant 2 entering compressor 1 enter the next cycle.

[0045] A second expansion valve 7 is provided on the pipe connecting the secondary refrigerant outlet of the condenser evaporator 3 and the refrigerant inlet of the finned evaporator 5 .

[0046] The dehumidification and drying steam unit also includes a venturi ejector 21. The end of the first steam pipe 27, remote from the flash tank 16, is connected to the suction port of the venturi ejector 21. The high-pressure inlet of the venturi ejector 21 is connected to a steam source, which can generate high-temperature steam, such as a boiler. The outlet of the venturi ejector 21 is connected to an energy-consuming device. The low-pressure steam from the flash tank 16 is mixed with the high-temperature, high-pressure steam in the venturi ejector 21 before entering the energy-consuming device 20.

[0047] Furthermore, the dehumidification and drying steam unit also includes a condensate pipe 24, one end of which is connected to the water inlet at the bottom of the flash tank 16, and the condensate pipe 24 is also connected to the bottom of the energy-consuming equipment 20. The steam condensate formed in the energy-consuming equipment 20 can flow into the condensate pipe 24, which can replenish water for the flash tank 16.

[0048] The method of use of the present invention is as follows:

[0049] Step 1: The high-temperature and high-pressure refrigerant 1 and refrigerant 2 from the compressor 1 enter the condenser 13. In the condenser 13, the refrigerant 1 exchanges heat with the water in the flash tank 16 to heat the water in the flash tank 16. After the heat exchange, the refrigerant 1 becomes a high-temperature and high-pressure liquid refrigerant.

[0050] Step 2: The refrigerant 1 and the refrigerant 2 coming out of the condenser 13 enter the gas-liquid separator 9, where the liquid refrigerant 1 and the gaseous refrigerant 2 are separated into gas and liquid.

[0051] Step 3: Refrigerant 1 from the first refrigerant outlet of the gas-liquid separator 9 passes through the first expansion valve and enters the condenser evaporator 3 from the primary refrigerant inlet of the condenser evaporator 3. Refrigerant 2 from the second refrigerant outlet of the gas-liquid separator 9 enters the fin condenser 5. The fin condenser 5 heats the dry air passing through it.

[0052] Step 4: The refrigerant 2 coming out of the finned condenser 5 enters the condenser evaporator 3 from the secondary refrigerant inlet of the condenser evaporator 3. The refrigerant 2 and the refrigerant 1 perform heat exchange in the condenser evaporator 3. The refrigerant 2 is cooled down and the refrigerant 1 is heated up.

[0053] Step 5: The refrigerant 2 from the secondary refrigerant outlet of the condenser evaporator 3 enters the finned evaporator 5 through the second expansion valve. The finned evaporator 5 cools the humid air in the first internal pipe 22, and the water vapor in the humid air condenses to achieve drying.

[0054] Step 6: The refrigerant coming out of the finned evaporator 5 enters the compressor 1, and refrigerant 1 and refrigerant 2 enter the next cycle;

[0055] Step 7: The humid air from the energy-consuming equipment enters the first internal pipe 22 through the first air duct, and passes through the heat pipe heat exchanger 4 and the finned evaporator 5 in sequence. The humid air is cooled for the first time when passing through the heat pipe heat exchanger 4. The heat pipe heat exchanger 4 transfers part of the heat from the first internal pipe 22 to the second internal pipe 23. The humid air is cooled again when passing through the finned evaporator 5. The water vapor in the humid air condenses into water, thereby drying the humid air and turning it into dry air.

[0056] Step 8: The dry air enters the second internal pipe 23 and passes through the heat pipe heat exchanger 4, the finned condenser 8, and enters the energy-consuming equipment through the second air duct 19. The dry air is heated for the first time when passing through the heat pipe heat exchanger 4 and for the second time when passing through the finned condenser 8.

[0057] Step 9: The steam generated in the flash tank 16 enters the venturi ejector 21 through the first steam pipe 27 and is mixed with the high-temperature, high-pressure steam from the steam source and then enters the energy-consuming equipment. The high-temperature, high-pressure steam heats the paper by transferring heat through the drum wall in the papermaking machine. The high-temperature, moist air evaporated from the paper is carried away by the drying gas.

[0058] Steps 1 to 9 can be performed simultaneously.

[0059] A first condensed water recovery pipe 24 is connected to the bottom of the first internal pipe 22 at a position corresponding to the finned evaporator 5 , and the condensed water is recovered through the first condensed water recovery pipe 24 .

[0060] Example 2

[0061] In this embodiment, a heat exchange core 25 is used to replace the heat pipe heat exchanger 4 in the first embodiment, and the rest is exactly the same as the solution in the first embodiment. The cross section of the heat exchange core 25 is square, and has air inlet 1, air outlet 1, air inlet 2 and air outlet 2. Air inlet 1 is connected to air outlet 1 and is located on the opposite surface of the square, and air inlet 2 is connected to air outlet 2 and is located on the other opposite surface of the square. The first internal pipe 22 and the second internal pipe 23 are divided into two parts by a partition, that is, the first internal pipe 22 and the second internal pipe 23 are divided into four parts in total. For the convenience of description, the four parts are respectively referred to as the first part, the second part, the third part and the fourth part. The first part is the part of the first internal channel connected to the first air duct 17, the fourth part is the part of the second internal channel connected to the second air duct 19, the other part of the first internal channel is the second part, and the other part of the second internal channel is the third part. The air inlet 1 is located in the first part, and the air outlet 2 is located in the second part. Inlet 1 is located in the third section, inlet 2 is located in the second section, and outlet 2 is located in the fourth section. The second and third sections are connected. Steam from the first channel enters the first section, passes through the heat exchange core 25, and then enters the third section from outlet 1. From the third section, it enters the second section. A finned evaporator 5 is provided in the second section. When the steam passes through the finned evaporator 5, the water vapor in the steam is condensed into water, thereby achieving drying. After entering from inlet 2 of the second section, it passes through the heat exchange core 25 and enters the fourth section from outlet 2. At this time, the gas is heated by the gas entering from inlet 1. A finned condenser 8 is provided in the fourth section, and the gas is heated again after passing through the finned condenser 8. The heated gas enters the second channel 19 from the fourth section.

[0062] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Dehumidification and drying steam unit, used to dehumidify and dry the gas required by external energy-consuming equipment, including: The first internal pipe and the second internal pipe each have an air inlet and an air outlet, the first internal pipe and the second internal pipe are arranged in parallel, and the air outlet of the first internal pipe is connected to the air inlet of the second internal pipe; a fin condenser, disposed inside the second internal pipe, for heating the dehumidified and dried air; The finned evaporator is arranged inside the first internal pipe and is used to cool and condense the air to be dehumidified and dried; a heat exchanger, a portion of which is disposed in the first inner pipe and the other portion of which is disposed in the second inner pipe, for transferring a portion of the heat in the air to be dehumidified and dried in the first inner pipe to the second inner pipe; Along the flow direction of the air, a heat exchanger and a fin evaporator are sequentially arranged in the first internal pipe, and a heat exchanger and a fin condenser are sequentially arranged in the second internal pipe.

2. The dehumidification drying steam unit according to claim 1, characterized in that: Also includes: The gas-liquid separator has a first inlet, a first refrigerant outlet, and a second refrigerant outlet. Refrigerants in different states can enter from the first inlet, and the gas-liquid separator can separate the refrigerant into gaseous refrigerant and liquid refrigerant. The second refrigerant outlet is connected to the refrigerant inlet of the finned condenser through a pipeline; The condensing evaporator has a primary refrigerant inlet, a primary refrigerant outlet, a secondary refrigerant inlet and a secondary refrigerant outlet. The primary refrigerant inlet is connected to the primary refrigerant outlet, and the secondary refrigerant inlet is connected to the secondary refrigerant outlet. The first refrigerant outlet of the gas-liquid separator is connected to the primary refrigerant inlet through an expansion valve, and the refrigerant outlet of the fin condenser is connected to the secondary refrigerant inlet through a pipeline.

3. The dehumidification drying steam unit according to claim 2, characterized in that: Also includes: The compressor has a refrigerant inlet and a refrigerant outlet, wherein the compressor contains both refrigerant 1 and refrigerant 2, the boiling point of refrigerant 1 is higher than the boiling point of refrigerant 2, and the primary refrigerant outlet of the condenser evaporator and the refrigerant outlet of the finned evaporator are connected to the refrigerant inlet of the compressor; a condenser, the condenser having a refrigerant inlet, a refrigerant outlet, a first water inlet, and a first water outlet, the refrigerant inlet of the condenser being connected to the refrigerant outlet of the compressor via a pipeline, and the refrigerant outlet of the condenser being connected to the first inlet; The flash tank, the first water inlet of the condenser is connected to a position near the bottom of the flash tank through a pipeline, and the first water outlet of the condenser is connected to a position near the top of the flash tank through a pipeline.

4. The dehumidification drying steam unit according to claim 3, characterized in that: It also includes a venturi ejector, the gas outlet end of the flash tank is connected to the suction port of the venturi ejector through a first steam pipe, the high-pressure inlet of the venturi ejector is connected to a steam source, and the outlet of the venturi ejector is connected to energy-consuming equipment.

5. The dehumidification drying steam unit according to claim 1, characterized in that: The energy-consuming device is connected to the air inlet of the first internal pipeline through the first air duct, and is connected to the air outlet of the second internal pipeline through the second air duct.

6. The dehumidification drying steam unit according to claim 1, characterized in that: The heat exchanger adopts a heat exchange core, the cross-section of which is square, and has an air inlet 1, an air outlet 1, an air inlet 2 and an air outlet 2. The air inlet 1 is connected to the air outlet 1 and is located on opposite surfaces of the square, and the air inlet 2 is connected to the air outlet 2 and is located on another opposite surface of the square. The first internal pipe and the second internal pipe are arranged in parallel, the first internal pipe is divided into a first part and a second part by a partition, and the second internal pipe is divided into a third part and a fourth part by a partition. The first part is the inlet of the first internal channel, and the fourth part is the outlet of the second internal channel. The other part of the first internal channel is the second part, and the other part of the second internal channel is the third part. The second part is connected to the third part. The air inlet 1 is located in the first part, the air outlet 1 is located in the third part, the air inlet 2 is located in the second part, and the air outlet 2 is located in the fourth part. The gas entering from the inlet of the first internal channel passes through the air inlet 1, the air outlet 1, the fin evaporator, the air inlet 2, the air outlet 2, and the fin condenser in sequence.

7. A dehumidification and drying method, using the dehumidification and drying steam unit according to any one of claims 1 to 6, comprising the following steps: Step 1: The high-temperature and high-pressure gaseous refrigerant 1 and refrigerant 2 from the compressor enter the condenser and perform heat exchange with the water in the flash tank in the condenser, heating the water in the flash tank. Refrigerant 1 becomes liquid, while refrigerant 2 remains in gaseous state. Step 2: Refrigerant 1 and refrigerant 2 coming out of the condenser enter the gas-liquid separator, where they are separated. Step 3: Refrigerant 1 from the first refrigerant outlet of the gas-liquid separator passes through the first expansion valve and enters the condenser evaporator from the primary refrigerant inlet of the condenser evaporator. Refrigerant 2 from the second refrigerant outlet of the gas-liquid separator enters the fin condenser, and the fin condenser heats the dry air passing through it. Step 4: The refrigerant 2 coming out of the finned condenser enters the condenser evaporator through the secondary refrigerant inlet of the condenser evaporator. The refrigerant 2 and the refrigerant 1 perform heat exchange in the condenser evaporator, the refrigerant 2 is cooled, and the refrigerant 1 is heated; Step 5: The refrigerant 2 from the secondary refrigerant outlet of the condenser evaporator enters the finned evaporator through the second expansion valve. The finned evaporator cools the humid air in the first internal pipe, and the water vapor in the humid air condenses to achieve drying. Step 6: The refrigerant coming out of the finned evaporator enters the compressor, and refrigerant 1 and refrigerant 2 enter the next cycle; Step 7: The humid air from the energy-consuming equipment enters the first internal pipe through the first air duct, and passes through the heat pipe heat exchanger and the fin condenser in sequence. The humid air is cooled for the first time when passing through the heat pipe heat exchanger. The heat pipe heat exchanger transfers part of the heat from the first internal pipe to the second internal pipe. The humid air is cooled again when passing through the fin evaporator. The water vapor in the humid air is condensed into water, thereby drying the humid air and turning it into dry air. Step 8: The dry air enters the second internal pipe and passes through the heat pipe heat exchanger, the finned condenser, and enters the energy-consuming equipment through the second air duct. The dry air is heated for the first time when passing through the heat pipe heat exchanger and for the second time when passing through the finned condenser. Step 9: The steam generated in the flash tank enters the venturi ejector through the first steam pipe and is mixed with the high-temperature and high-pressure steam from the steam source and then enters the energy-consuming equipment. After use, the high-temperature and high-pressure steam is carried out by dry air. Steps 1 to 9 can be performed simultaneously.

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