High-temperature heat pump, filter press and air compressor coupled drying device

Abstract

The invention provides a high-temperature heat pump, filter press and air compressor coupling drying device which comprises an air circulation system, a heat energy exchange circulation system and a diaphragm squeezing system, the diaphragm squeezing system comprises a diaphragm filter press, a storage tank, an electric control valve, a feeding pump, an emulsion box, a medium-voltage electric control valve and a plunger pump, and a fourth pipeline is communicated between the storage tank and the feeding pump. And an electric control valve is arranged on the pipeline IV. Compared with the prior art, the system has the following beneficial effects that sensible heat and latent heat of medium-temperature and high-humidity gas discharged from the filter press are recovered and converted through the high-temperature heat pump unit, air heating is achieved, efficient energy utilization is achieved, the medium-temperature and high-humidity gas is converted into low-temperature gas which is higher than the temperature in the atmosphere and has the medium pressure of 0.4 Mpa after heat and humidity exchange, the low-temperature gas and the medium-temperature gas are supplied to the air compressor for use, and the energy consumption is reduced. And closed circulation is formed, efficient utilization of heat energy and potential energy is achieved, the water content in the coal gasification slag is reduced from 57% to 10% or below, and comprehensive utilization of the coal gasification slag solid waste is achieved.

Description

Technical Field

[0001] This invention belongs to the field of coal gasification slag, specifically relating to a high-temperature heat pump, filter press and air compressor coupled drying device. Background Technology

[0002] Regarding solid waste utilization, on February 9, 2024, the General Office of the State Council issued the "Opinions on Accelerating the Construction of a Waste Recycling System," proposing to improve resource utilization efficiency as the goal, and to take refined management, effective recycling, and efficient utilization of waste as the path, covering all areas of production and life, developing the resource recycling industry, improving incentive and constraint mechanisms, and accelerating the construction of a comprehensive, efficient, and standardized waste recycling system. The state has issued a series of policies, clearly pointing out the need to develop efficient resource recycling technologies, promote the green development of coal resources and the recycling of waste, including the resource utilization of coal-based solid waste such as coal gasification slag. Solid waste utilization promotes the resource utilization of coal gasification slag, using coal gas (such as coal gasification syngas) as an important clean energy source and chemical raw material. Its preparation process usually involves high-temperature gasification, purification, and compression, resulting in high energy consumption and low waste heat utilization, which restricts the improvement of industrial economics and environmental protection.

[0003] Gasification slag is a solid waste generated during the high-temperature gasification (1000-1500℃) of coal. Its main components are SiO2 (40-60%), Al2O3 (20-35%), Fe2O3 (5-15%), and unburned residual carbon (5-30%). It also contains small amounts of heavy metals (As, Hg, Pb, etc.). Its characteristics include: high moisture content: the moisture content of the slag slurry after gasification is 40-60%, which requires dehydration treatment; high viscosity: residual carbon and mineral particles form a colloidal structure, which is difficult to dehydrate mechanically; environmental risks: open-air stockpiling leads to heavy metal leaching and dust pollution.

[0004] The necessity of gasification slag is mainly reflected in the following aspects: Resource recovery: Coal gasification slag contains a variety of valuable metallic elements and chemical substances, such as iron, aluminum, calcium, and silicon. Through physical and chemical treatment, these useful substances can be extracted and separated for use in the manufacture of building materials, chemical products, alloys, etc., realizing the recycling of resources and reducing the demand for original mineral resources. Energy utilization: Coal gasification slag, as fuel, can release organic matter and carbon elements through high-temperature combustion, generating heat energy or converting it into electricity for industrial production or heating. This helps to achieve energy diversification and reduce dependence on traditional energy sources. Building material utilization: Gasification slag can be converted into building materials, such as cement, concrete, and bricks. This not only reduces the exploitation of natural resources but also reduces energy consumption and carbon emissions in the production process of building materials. Soil improvement: Some components in gasification slag are beneficial to soil, such as silicon, aluminum, calcium, and organic matter. Mixing coal gasification slag with soil can improve soil structure and fertility, and increase agricultural productivity. This invention reduces the moisture content of coal gasification slag, providing preliminary conditions for the efficient utilization of coal gasification slag resources.

[0005] Patent applications CN202120908021.9 and CN202420956910.6 propose using air compressors for drying and improve the structure of the air compressors to facilitate the drying of media and the utilization of waste heat. Patent application CN202222092758.5 ​​discloses a vertical waste heat recovery combination device, which relates to the field of waste heat recovery technology and is used for heat exchange between thermal coal gas and water.

[0006] The above three invention patents mainly optimize the device itself, but do not involve the coordination of the filter press, resulting in low system integration. In combination with the above inventions, this invention proposes a high-temperature heat pump, filter press and air compressor coupled drying device. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a high-temperature heat pump, filter press, and air compressor coupled drying device.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution: A high-temperature heat pump, filter press, and air compressor coupled drying device includes an air circulation system, a heat energy exchange circulation system, and a diaphragm pressing system. The diaphragm pressing system includes a diaphragm filter press, a storage tank, an electrically controlled valve, a feed pump, an emulsion tank, a medium-pressure electrically controlled valve, and a plunger pump. A pipe (4) connects the storage tank and the feed pump, and an electrically controlled valve is installed on pipe 4. A pipe (5) is installed on the feed pump. Multiple diaphragm filter plates are installed inside the diaphragm filter press, each with a feed inlet. The filter plates are compacted by the diaphragm filter press to form a feed channel. Pipe 5 connects to the foremost feed inlet. A diaphragm chamber is provided inside each diaphragm filter plate, and a filter cloth is installed on the outer surface of the diaphragm filter plate. A plunger pump is connected to the emulsion tank via an emulsion pipe, and a medium-pressure electrically controlled valve is installed on the emulsion pipe. A pipe (5) connects to the plunger pump. Pipeline 6 is connected to a single-cavity flexible connecting pipe, which is connected to the emulsion inlet of the diaphragm filter plate. The diaphragm filter plate is provided with an emulsion outlet. An emulsion chamber is provided inside the diaphragm filter plate. The emulsion chamber is connected to the emulsion inlet and the emulsion outlet. A secondary single-cavity flexible connecting pipe is connected to the emulsion outlet. A drain electric valve is provided on the secondary single-cavity flexible connecting pipe. The diaphragm filter press has an outer shell. The diaphragm filter plate is located in the outer shell. After the adjacent diaphragm filter plates are compacted in the filter press, a diaphragm chamber is formed. The diaphragm chamber contains coal gasification slag. A filtrate outlet is provided at the bottom of the diaphragm filter plate. An air circulation system is connected to the outer shell.

[0009] Furthermore, the air circulation system includes an air compressor that allows dry air to enter, an air-water heat exchange pressure tank, an induced draft fan, and a heat and moisture exchanger, returning the air to the air compressor.

[0010] Furthermore, the heat energy exchange cycle system includes a heat source-side cycle system, a refrigerant cycle system within the heat pump unit, and a user-side water cycle system. The heat source-side cycle system is connected to a heat and moisture exchanger, the refrigerant cycle system within the heat pump unit is connected to the heat source-side cycle system, and the user-side water cycle system is connected to an air-water heat exchange pressure tank.

[0011] Furthermore, the heat source-side circulation system includes a water pump and a heat pump unit. The water pump is equipped with a suction pipe and an outlet pipe. The suction pipe is connected to the heat and moisture exchanger, and the outlet pipe is connected to the evaporator of the heat pump unit. The outlet of the evaporator is equipped with a circulation pipe connected to the heat and moisture exchanger. The refrigerant circulation system inside the heat pump unit includes a refrigerant pipe. The refrigerant pipe is connected to the evaporator and the compressor. The compressor is connected to the condenser through a pipe. The condenser and the evaporator are connected through a pressure-reducing assembly.

[0012] Furthermore, the pressure-reducing assembly includes a second pipe and an expansion valve. The second pipe is connected between the condenser and the evaporator, and the expansion valve is installed on the second pipe.

[0013] Furthermore, the user-side water circulation system includes a circulating water pipe on the condenser, which connects and communicates with the air-water heat exchange pressure tank and the condenser. The air-water heat exchange pressure tank is also connected to the condenser via a pipe, and the user-side circulating water pump is connected to the circulating water pipe.

[0014] Furthermore, the air-water heat exchange pressure tank is equipped with a heating device, the storage tank stores slurry inside, and the storage tank is equipped with an agitator. The outer wall of the storage tank is equipped with a drive motor to drive the agitator.

[0015] Furthermore, the top of the diaphragm filter plate is equipped with an air inlet and an air inlet channel. The air inlet channel is an air inlet pipe that connects to the diaphragm filter chamber through an air inlet guide hole. The diaphragm filter chamber is equipped with honeycomb-shaped coal gasification slag. Gas-liquid flow channels are evenly arranged on the diaphragm filter plate. Capillary water and interstitial water in the coal gasification slag are forced into the gas-liquid flow channels. The bottom of the diaphragm filter plate is provided with a guide hole, a confluence chamber, and a filtrate outlet. The guide hole, confluence chamber, and filtrate outlet are interconnected. The filtrate is discharged from the filter press through the filtrate outlet. At the same time, high-temperature and high-pressure gas is introduced into the diaphragm chamber. After absorbing the attached water and internal water in the coal gasification slag, it becomes medium-temperature, high-humidity, and medium-pressure gas. It enters the exhaust channel through the exhaust guide hole and the bottom exhaust port on the diaphragm filter plate, connects to the induced draft fan, and finally enters the heat and humidity exchanger. The attached water and internal water in the coal gasification slag enter the bottom exhaust port through the exhaust guide hole of the diaphragm filter plate.

[0016] The beneficial effects of this invention are: By coupling an air compressor, a filter press system, and a high-temperature heat pump unit, a high-temperature heat pump, filter press, and air compressor coupled drying device is formed. At the same time, the waste heat from the exhaust air is recovered, forming a closed loop and realizing the efficient utilization of thermal energy.

[0017] The pressing system reduces the moisture content of the water-slurry coal gasification slag to about 57% through pump pressing and diaphragm pressing.

[0018] Based on the honeycomb structure of coal gasification slag, a novel filter plate with guiding air, through air, and guiding water was designed to suit its characteristics.

[0019] Using the pressure energy of an air compressor, capillary water and interstitial water attached to the honeycomb structure in the coal gasification slag are forced out under the combined action of guiding and through-flow. Under the action of gas-liquid flow channels and gravity, the moisture content of the coal gasification slag is reduced from 57% to about 20%. High-temperature gas absorbs the internal water and attached water in the coal gasification slag, and finally the moisture content of the coal gasification slag is reduced to below 10%.

[0020] By recovering the sensible and latent heat of the medium-temperature, high-humidity gas discharged from the filter press and converting it through a high-temperature heat pump unit, the air is heated, achieving efficient energy utilization. After heat and moisture exchange, the medium-temperature, high-humidity gas becomes low-temperature gas, which is higher than the temperature in the atmosphere and has a medium pressure of 0.4 MPa, and is then used by the air compressor, forming a closed loop to achieve efficient utilization of thermal and potential energy. The moisture content in the coal gasification slag is reduced from 57% to below 10%, realizing the comprehensive utilization of solid waste from coal gasification slag. Attached Figure Description

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A system flow diagram of a high-temperature heat pump, filter press and air compressor coupled drying device of the present invention is shown; Figure 2 A plan view of the diaphragm filter plate of a high-temperature heat pump, filter press and air compressor coupled drying device of the present invention is shown; Figure 3 A schematic elevation view of the diaphragm filter plate of a high-temperature heat pump, filter press and air compressor coupled drying device of the present invention is shown; Figure 4 This diagram illustrates the compaction of two diaphragm filter plates in a high-temperature heat pump, filter press, and air compressor coupled drying device according to the present invention. Figure 5 A schematic diagram of the moisture composition of coal gasification slag is shown in the present invention, which is a high-temperature heat pump, filter press and air compressor coupled drying device.

[0023] In the diagram: 1. Diaphragm filter press; 1.1. Hydraulic system; 1.2. Diaphragm filter plate; 1.3. Diaphragm filter chamber; 1.4. Filter cloth; 1.5. Gas-liquid flow channel; 1.6. Feed channel; 1.7. Air inlet channel; 1.8. Exhaust channel; 1.2.1. Feed inlet; 1.2.2. Guide hole; 1.2.3. Merging chamber; 1.2.4. Filtrate outlet; 1.2.5. Emulsion chamber; 1.2.6. Emulsion inlet; 1.2.7. Air inlet channel; 1.2.8. Air inlet; 1.2.9. Air inlet guide hole; 1.2.10. Exhaust guide port; 1.2.11. Bottom exhaust port; 28.1. Capillary water; 28.2. Interstitial water; 28.3. Adhered water; 28.4. Internal water; 2. Air - Water heat exchange pressure tank; 3. Air compressor; 4. Fan; 5. Heat and moisture exchanger; 6. Water pump; 7. Heat pump unit; 7.1. Evaporator; 7.2. Compressor; 7.3. Condenser; 7.4. Expansion valve; 8. Circulating water pump; 9. Air-water heat exchange tube; 10. Water suction pipe; 11. Water outlet pipe; 12. Circulation pipe; 13. Refrigerant pipe; 14. Pipe 1; 15. Pipe 2; 16. Circulating water pipe; 17. Storage tank; 18. Electrically controlled valve; 19. Feed pump; 20. Emulsion tank; 21. Medium-pressure electrically controlled valve; 22. Plunger pump; 23. Pipe 5; 24. Emulsion pipe; 25. Single-cavity flexible connecting pipe; 26. Secondary single-cavity flexible connecting pipe; 27. Drain electric valve; 28. Coal gasification slag; 29. ​​Pipe 3. Detailed Implementation

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Please see Figure 1-5This invention provides a high-temperature heat pump, filter press, and air compressor coupled drying device, including an air circulation system, a heat energy exchange circulation system, and a diaphragm pressing system. The diaphragm pressing system includes a diaphragm filter press 1, a storage tank 17, an electrically controlled valve 18, a feed pump 19, an emulsion tank 20, a medium-pressure electrically controlled valve 21, and a plunger pump 22. A pipe 4 connects the storage tank 17 and the feed pump 19, and the electrically controlled valve 18 is arranged on the pipe 4. A pipe 5 23 is provided on the feed pump 19. Multiple diaphragm filter plates 1.2 are provided inside the diaphragm filter press 1. The diaphragm filter plates 1.2 have inlets 1.2.1, and the inlets 1.2.1 are connected by a feed channel 1.6, which is a feed pipe. Pipe 5 23 connects to the foremost inlet 1.2.1. A diaphragm chamber 1.3 is provided inside the diaphragm filter plate 1.2, and the outer surface of the diaphragm filter plate 1.2 is provided with... A filter cloth 1.4 is connected to an emulsion tank 20 via an emulsion pipe 24, and a plunger pump 22 is connected to the plunger pump 22 via a pipe 6 via a single-cavity flexible connecting pipe 25. The single-cavity flexible connecting pipe 25 is connected to the emulsion inlet 1.2.6 of the diaphragm filter plate 1.2. The diaphragm filter plate 1.2 is provided with an emulsion outlet 1.2.7. An emulsion chamber 1.2.5 is provided inside the diaphragm filter plate 1.2. The emulsion chamber 1.2.5 is connected to the emulsion inlet 1.2.6 and the emulsion outlet 1.2.7. A secondary single-cavity flexible connecting pipe 26 is connected to the emulsion outlet 1.2.7. The diaphragm filter press 3 has an outer casing. The diaphragm filter plate 1.2 is located inside the outer casing. There is coal gasification slag 28 between adjacent diaphragm filter plates 1.2. The bottom end of the diaphragm filter plate 1.2 is provided with a filtrate outlet 1.2.4. An air circulation system is connected to the diaphragm filter press 1. Low-temperature dry air flows into the room, completing the air circulation and achieving dehydration of the gasification slag. The heat energy exchange circulation system is divided into three systems: the heat source side circulation system, the refrigerant circulation system in the heat pump unit, and the user side water circulation system, realizing energy conversion and providing a heat source, and ensuring the rationalization of energy use.The slurry exits from the storage tank 17 equipped with a mixer, flows into the solenoid control valve, enters the feed pump 19, and after being pressurized, enters the diaphragm filter plate in the diaphragm filter press 1 through a pipeline, and then enters the feed inlet 1.2.1. The material enters the diaphragm chamber 1.3 in the diaphragm filter plate 1.2 through the feed channel 1.6. When the feed pressure reaches 0.8MPa, the solenoid control valve and the feed pump are closed. At the same time, the filtrate, i.e., water, enters the liquid flow channel 1.5 through the filter cloth 1.4, collects in the lower guide hole 1.2.2, flows into the confluence chamber 1.2.3 at the bottom of the diaphragm filter plate, and finally is discharged from the filtrate outlet 1.2.4. The filtrate water is recycled. When the pressure reaches the specified requirement, a filter cake is formed, the system is shut down, and the feeding process is completed. The system enters the diaphragm filter pressing stage. The emulsion from the emulsion tank 20 enters the medium-pressure electric control valve 21. After being pressurized, it passes through the plunger pump 22 and pipeline six into the single-chamber flexible connecting pipe 25, and then enters the emulsion inlet 1.2.6 of the diaphragm filter plate 1.2, reaching the emulsion chamber 1.2.5 of the diaphragm filter plate 1.2 in the diaphragm filter press 3. At this time, the discharge electric valve 27 is closed. When the pressure reaches the specified pressure and time, the medium-pressure control valve and the plunger pump are closed, and the discharge electric valve 27 is opened. The emulsion flows from the emulsion outlet 1.2.7 of the diaphragm filter plate 1.2 back to the emulsion tank 20 through the auxiliary single-chamber flexible connecting pipe 26. The filter pressing stage is completed. At this time, the moisture content of the coal gasification slag 28 is about 57%.

[0026] See Figure 1 The air circulation system includes an air compressor 3 for dry air intake, an air-water heat exchange pressure tank 2, an induced draft fan 4, and a heat and moisture exchanger 5.

[0027] See Figure 1-5The air circulation system includes an air compressor 3 for dry air intake, an air-to-water heat exchange pressure tank 2, an induced draft fan 4, and a heat-to-humidity exchanger 5. The heat energy exchange circulation system includes a heat source-side circulation system, a refrigerant circulation system within the heat pump unit, and a user-side water circulation system. The heat source-side circulation system is connected to the heat-to-humidity exchanger 5. The refrigerant circulation system within the heat pump unit is connected to the heat source-side circulation system. The user-side water circulation system is connected to the air-to-water heat exchange pressure tank 2. The heat source-side circulation system includes a water pump 6 and a heat pump unit 7. The water pump 6 is equipped with a suction pipe 10 and an outlet pipe 11. The suction pipe 10 is connected to the heat-to-humidity exchanger 5, and the outlet pipe 11 is connected to the evaporator 7.1 of the heat pump unit 7. The outlet of the evaporator 7.1 is provided with a connection to the heat-to-humidity exchanger. The refrigerant circulation system within the heat pump unit includes a refrigerant pipe 13, which connects the evaporator 7.1 and the compressor 7.2. The compressor 7.2 is connected to the condenser 7.3 via pipe 14. The condenser 7.3 and the evaporator 7.1 are connected via a pressure-reducing assembly, which includes pipe 2 15 and an expansion valve 7.4. Pipe 2 15 connects the condenser 7.3 and the evaporator 7.1, and the expansion valve 7.4 is located on pipe 2 15. The side water circulation system includes a circulating water pipe 16 on the condenser 7.3, which connects the air-water heat exchange pressure tank 2 and the condenser 7.3, and they are interconnected. The air-water heat exchange pressure tank 2 is also connected via pipe 3 29. The condenser 7.3 is connected to a pressurized circulating water pump 8 via the circulating water pipe 16. A heating device is installed on the air-water heat exchange pressure tank 2. The storage tank 17 stores slurry and contains an agitator. A drive motor for the agitator is installed on the outer wall of the storage tank 17. The top of the diaphragm filter plate 1.2 has an air inlet 1.2.8 and an air inlet channel 1.7. The air inlet channel 1.7 connects to the diaphragm filter chamber 1.3 via an air inlet guide hole 1.2.9. The diaphragm filter chamber 1.3 contains honeycomb-shaped coal gasification slag 28. Gas-liquid flow channels 1.5 are evenly arranged on the diaphragm filter plate 1.2. Capillary water 28.1 and interstitial water 28.2 within the coal gasification slag 28 are forced into the gas-liquid flow channels 1.5. The diaphragm filter plate 1.2... The bottom is provided with a guide hole 1.2.2, a manifold 1.2.3, and a filtrate outlet 1.2.4. The guide hole 1.2.2, the manifold 1.2.3, and the filtrate outlet 1.2.4 are interconnected. The diaphragm filter plate 1.2 is also provided with an exhaust guide port 1.2.10, a bottom exhaust port 1.2.11, and an exhaust channel 1.8 for discharge, which is connected to the induced draft fan 4. The attached water 28.3 and internal water 28.4 in the gasification slag 28 enter the bottom exhaust port 1.2.11 through the exhaust guide port 1.2.10 of the diaphragm filter plate 1.2. The air-water heat exchange pressure tank 2 is provided with an air-water heat exchange pipe 9. The hot air outlet of the air-water heat exchange pressure tank 2 is connected to the front air inlet 1.2.8.

[0028] After the aforementioned filter pressing stage is completed, the moisture content of the gasified slag 28 is approximately 57%. Following the filter pressing stage, the process enters the high-temperature air drying stage. The recovered low-temperature, low-humidity dry air enters the air compressor 3. During compression, the air volume decreases and the pressure increases, thus significantly increasing its potential energy, i.e., pressure energy. Inside the air compressor, the air is pressurized from one atmosphere to eight atmospheres and enters the air-water heat exchange pressure tank. After being heated to 60-100℃ in the air-water heat exchange pressure tank, the air becomes a high-temperature, high-pressure, low-humidity gas. This gas enters the air inlet 1.2.8 at the top of the diaphragm filter plate 1.2 in the diaphragm filter press 1, then enters the air inlet channel 1.7. Under the action of the air inlet guide holes 1.2.9, it enters the diaphragm filter chamber 1.3. The high-pressure air opens the airflow channels of the honeycomb-shaped gasified slag 28 within the diaphragm filter chamber 1.3, thus drying the gasified slag. The capillary water 28.1 and interstitial water 28.2 inside the gas slag 28 are forced into the gas-liquid flow channel 1.5, collected in the lower guide hole 1.2.2 and flow into the confluence cavity 1.2.3 at the bottom of the diaphragm filter plate, and finally discharged from the filtrate outlet 1.2.4. At this time, the moisture content of the gasification slag is about 20%1. At the same time, the attached water 2.3 is absorbed by the high temperature dry air, and the internal water 2.4 becomes medium temperature, medium pressure and high humidity gas. It enters the bottom exhaust port 1.2.11 through the exhaust guide port 1.2.10 of the diaphragm filter plate 1.2. After the gas is collected, it is discharged from the exhaust channel 1.8 and enters the induced draft fan 4. Under the action of the induced draft fan 4, the medium temperature, medium pressure and high humidity gas enters the heat and humidity exchanger 15. After the heat and humidity exchange is completed in the heat and humidity exchanger 15, the low temperature, low humidity dry air flows into the air compressor 3 through the air duct, completing the air circulation. At this time, the moisture content of the gasification slag 28 is below 10%.

[0029] Furthermore, the heat energy exchange cycle system is divided into three systems. The heat source side cycle is as follows: after the medium-temperature and high-humidity gas completes heat and humidity exchange in the heat and humidity exchanger 5, the temperature of the low-temperature water rises. Under the action of the circulating water pump 8, it enters the evaporator 7.1 in the high-temperature heat pump unit 7 to exchange heat with the refrigerant. The water temperature drops and it comes out of the evaporator 7.1 and returns to the heat and humidity exchanger 5 to complete one cycle, providing a heat source for the high-temperature heat pump unit 7.

[0030] The refrigerant circulation within the high-temperature heat pump unit 7: The refrigerant absorbs heat energy from water in the evaporator 7.1, evaporating from a low-temperature, low-pressure liquid into a low-temperature, low-pressure gas. This gas then enters the compressor 7.2, where it is compressed into a high-temperature, high-pressure gas. Upon entering the condenser 7.3, it releases heat and exchanges heat with the circulating water on the side of the condenser, becoming a low-temperature, high-pressure liquid. The liquid refrigerant then passes through the expansion valve 7.4, where its pressure is reduced, returning to a low-temperature, low-pressure liquid before entering the evaporator, completing one cycle. This process realizes the conversion of low-temperature heat energy into high-temperature heat energy.

[0031] Water circulation on the user side: After the high-temperature and high-pressure refrigerant exchanges heat with the water on the user side in the condenser 7.3, the circulating water from the condenser outlet is pressurized by the circulating water pump 8 and enters the air-water heat exchange pressure tank 2. The circulating water exchanges heat with the high-pressure, low-humidity air compressed from the air compressor 3. The cooled water flows out of the air-water heat exchange pressure tank 2 and then enters the condenser 7.3 to complete a cycle, so that the heat energy is used efficiently. The cake unloading stage, product transportation, and filtrate collection and utilization are all conventional technologies and will not be described in detail.

[0032] In operation, the diaphragm filter press 1 first starts working from the hydraulic system 1.1, gradually pressing the diaphragm filter plates 1.2 under hydraulic pressure. When the hydraulic pressure reaches 0.8 MPa, the locking device locks, and the system pressurization is complete. Then, the coal gasification slag comes out from the storage tank 17 with the agitator, flows into the electromagnetic control valve, enters the feed pump 19, and after pressurization, enters the diaphragm filter plates 1.2 in the diaphragm filter press 1 through the pipeline, and then enters the feed inlet 1.2.1. The material enters the diaphragm chamber 1.3 in the diaphragm filter plate 1.2 through the feed channel 1.6. When the feed pressure reaches 0.8 MPa, the electromagnetic control valve and the feed pump close. At the same time, the filtrate, i.e., water, enters the liquid flow channel 1.5 through the filter cloth 1.4, collects in the lower guide hole 1.2.2, flows into the confluence chamber 1.2.3 at the bottom of the diaphragm filter plate, and finally exits from the filtrate outlet 1.2. 4. The filtrate is discharged and recycled. When the pressure reaches the specified requirements, a filter cake is formed, the system is shut down, and the feeding process is completed. After the feeding process is completed, the system enters the diaphragm filter pressing stage. The emulsion from the emulsion tank 20 enters the medium-pressure electric control valve 21. After being pressurized, it enters the single-chamber flexible connecting pipe 25 through the plunger pump 22 and pipe six, and enters the emulsion inlet 1.2.6 of the diaphragm filter plate 1.2. It reaches the emulsion chamber 1.2.5 of the diaphragm filter plate 1.2 in the diaphragm filter press 3. At this time, the discharge electric valve 27 is closed. When the pressure reaches the specified pressure and time, the medium-pressure control valve and the plunger pump are closed. At this time, the discharge electric valve 27 is opened, and the emulsion flows from the emulsion outlet 1.2.7 of the diaphragm filter plate 1.2 into the auxiliary single-chamber flexible connecting pipe 26 back to the emulsion tank 20. The filter pressing stage is completed. At this time, the moisture content of the coal gasification slag 28 is about 57%.

[0033] After the aforementioned filter pressing stage is completed, the moisture content of the gasification slag 28 is approximately 57%. Following the filter pressing stage, the process enters the high-temperature air drying stage. The recovered low-temperature, low-humidity dry air enters the air compressor 3. During compression, the air volume decreases and the pressure increases, thus its potential energy, i.e., pressure energy, increases significantly. Inside the air compressor, the air is pressurized from one atmosphere to eight atmospheres and enters the air-water heat exchange pressure tank. After being heated in the air-water heat exchange pressure tank to a temperature of 60-100℃, the air becomes a high-temperature, high-pressure, low-humidity gas. This gas enters the diaphragm filter press 1 through the air inlet 1.2.8 at the top of the diaphragm filter plate 1.2, then enters the air inlet channel 1.7, and under the action of the air inlet guide holes 1.2.9, enters the diaphragm filter chamber 1.3. The high-pressure air opens the airflow channels of the honeycomb-shaped gasification slag 28 within the diaphragm filter chamber 1.3, thus gasifying the coal. The capillary water 28.1 and interstitial water 28.2 inside the slag 28 are forced into the gas-liquid flow channel 1.5, collect in the lower guide hole 1.2.2 and flow into the confluence cavity 1.2.3 at the bottom of the diaphragm filter plate, and finally discharged from the filtrate outlet 1.2.4. At this time, the moisture content of the coal gasification slag is about 20%1. At the same time, the attached water 2.3 is absorbed by the high temperature dry air, and the internal water 2.4 becomes medium temperature, medium pressure and high humidity gas. It enters the bottom exhaust port 1.2.11 through the exhaust guide port 1.2.10 of the diaphragm filter plate 1.2. After the gas is collected, it is discharged through the exhaust channel 1.8 and enters the induced draft fan 4. Under the action of the induced draft fan 4, the medium temperature, medium pressure and high humidity gas enters the heat and humidity exchanger 5. After the heat and humidity exchange is completed in the heat and humidity exchanger 5, the low temperature, low humidity dry air flows into the air compressor 3 through the air duct, completing the air circulation. At this time, the moisture content of the coal gasification slag 28 is below 10%.

[0034] Furthermore, the heat energy exchange cycle system is divided into three systems. The heat source side cycle is as follows: after the medium-temperature and high-humidity gas completes heat and humidity exchange in the heat and humidity exchanger 5, the temperature of the low-temperature water rises. Under the action of the circulating water pump 8, it enters the evaporator 7.1 in the high-temperature heat pump unit 7 to exchange heat with the refrigerant. The water temperature drops and it comes out of the evaporator 7.1 and returns to the heat and humidity exchanger 5, completing one cycle and providing a heat source for the high-temperature heat pump unit 7.

[0035] The refrigerant circulation within the high-temperature heat pump unit 7 is as follows: In the evaporator 7.1, the refrigerant absorbs heat energy from the water, evaporating from a low-temperature, low-pressure liquid into a low-temperature, low-pressure gas. This gas then enters the compressor 7.2, where it is compressed into a high-temperature, high-pressure gas. Upon entering the condenser 7.3, it releases heat and exchanges heat with the circulating water on the side of the condenser, becoming a low-temperature, high-pressure liquid. The liquid refrigerant then passes through the expansion valve 7.4, where its pressure is reduced, returning to a low-temperature, low-pressure liquid before entering the evaporator, completing one cycle. This process achieves the conversion of low-temperature heat energy into high-temperature heat energy.

[0036] Water circulation on the user side: After the high-temperature and high-pressure refrigerant exchanges heat with the water on the user side in the condenser 7.3, the circulating water from the condenser outlet is pressurized by the circulating water pump 8 and enters the air-water heat exchange pressure tank 2. The circulating water exchanges heat with the high-pressure, low-humidity air compressed from the air compressor 3. The cooled water flows out of the air-water heat exchange pressure tank 2 and then enters the condenser 7.3 to complete a cycle, so that the heat energy is used efficiently. The cake unloading stage, product transportation, and filtrate collection and utilization are all conventional technologies and will not be described in detail.

[0037] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-temperature heat pump, filter press, and air compressor coupled drying device, characterized in that: Includes air circulation system, heat exchange circulation system, and diaphragm pressing system; The diaphragm pressing system includes a diaphragm filter press (1), a storage tank (17), an electric control valve (18), a feed pump (19), an emulsion tank (20), a medium-pressure electric control valve (21), and a plunger pump (22). A fourth pipe connects the storage tank (17) and the feed pump (19), and the electric control valve (18) is installed on the fourth pipe. A fifth pipe (23) is installed on the feed pump (19). Multiple diaphragm filter plates (1.2) are installed inside the diaphragm filter press (1), and the diaphragm filter plates (1.2) are opened... The filter press (1) is equipped with an inlet (1.2.1), and the inlet (1.2.1) is connected by an inlet channel (1.6). The inlet channel (1.6) is an inlet pipe, and pipe five (23) is connected to the inlet (1.2.1) at the front end. The diaphragm filter plate (1.2) is equipped with a diaphragm chamber (1.3), and the outer surface of the diaphragm filter plate (1.2) is equipped with a filter cloth (1.4). The diaphragm filter press (1) is equipped with a hydraulic system (1.1) on one side. The hydraulic system (1.1) is a hydraulic cylinder. A plunger pump (22) is connected to the emulsion tank (20) via an emulsion pipe (24). A single-chamber flexible connecting pipe (25) is connected to the plunger pump (22) via a pipe six. The single-chamber flexible connecting pipe (25) is connected to the emulsion inlet (1.2.6) of the diaphragm filter plate (1.2). An emulsion outlet (1.2.7) is provided on the diaphragm filter plate (1.2). An emulsion chamber (1.2.5) is provided inside the diaphragm filter plate (1.2). The emulsion chamber (1.2.5) is connected to the emulsion inlet (1.2.6) and the emulsion outlet (1.2.7). A secondary single-chamber flexible connecting pipe (26) is connected to the emulsion outlet (1.2.7). The diaphragm filter press (1) has an outer casing, and the diaphragm filter plates (1.2) are located inside the outer casing. There is coal gasification slag (28) between adjacent diaphragm filter plates (1.2). The bottom end of the diaphragm filter plate (1.2) is provided with a filtrate outlet (1.2.4). An air circulation system is connected to the diaphragm filter press (1).

2. A high-temperature heat pump, filter press, and air compressor coupled drying device according to claim 1, characterized in that: A medium-pressure electrically controlled valve (21) is installed on the emulsion pipe (24), and a drain electric valve (27) is installed on the auxiliary single-chamber flexible connecting pipe (26).

3. A high-temperature heat pump, filter press, and air compressor coupled drying device according to claim 2, characterized in that: The air circulation system includes an air compressor (3) for dry air intake, an air-water heat exchange pressure tank (2), an induced draft fan (4), and a heat and moisture exchanger (5).

4. A high-temperature heat pump, filter press, and air compressor coupled drying device according to claim 3, characterized in that: The heat energy exchange cycle system includes a heat source side circulation system, a refrigerant circulation system inside the heat pump unit, and a user side water circulation system. The heat source side circulation system is connected to the heat and humidity exchanger (5), the refrigerant circulation system inside the heat pump unit is connected to the heat source side circulation system, and the user side water circulation system is connected to the air-water heat exchange pressure tank (2).

5. A high-temperature heat pump, filter press, and air compressor coupled drying device according to claim 4, characterized in that: The heat source side circulation system includes a water pump (6) and a heat pump unit (7). The water pump (6) is equipped with a suction pipe (10) and an outlet pipe (11). The suction pipe (10) is connected to the heat and moisture exchanger (5). The outlet pipe (11) is connected to the evaporator (7.1) of the heat pump unit (7). The outlet of the evaporator (7.1) is equipped with a circulation pipe (12) connected to the heat and moisture exchanger (5). The refrigerant circulation system in the heat pump unit includes a refrigerant pipe (13). The refrigerant pipe (13) is connected to the evaporator (7.1) and the compressor (7.2). The compressor (7.2) is connected to the condenser (7.3) through pipe one (14). The condenser (7.3) and the evaporator (7.1) are connected through a pressure reduction assembly.

6. A high-temperature heat pump, filter press, and air compressor coupled drying device according to claim 5, characterized in that: The pressure reduction assembly includes pipe two (15) and expansion valve (7.4). Pipe two (15) is connected between condenser (7.3) and evaporator (7.1), and expansion valve (7.4) is located on pipe two (15).

7. A high-temperature heat pump, filter press, and air compressor coupled drying device according to claim 6, characterized in that: The side water circulation system includes a circulating water pipe (16) on the condenser (7.3), which connects the air-water heat exchange pressure tank (2) and the condenser (7.3) and is interconnected. The air-water heat exchange pressure tank (2) is also connected to the condenser (7.3) via a pipe three (29). A pressurized circulating water pump (8) is connected to the circulating water pipe (16).

8. A high-temperature heat pump, filter press, and air compressor coupled drying device according to claim 7, characterized in that: The air-water heat exchange pressure tank (2) is a heat exchanger. The storage tank (17) stores slurry inside and is equipped with an agitator. The outer wall of the storage tank (17) is equipped with a drive motor to drive the agitator.

9. A high-temperature heat pump, filter press, and air compressor coupled drying device according to claim 8, characterized in that: The top of the diaphragm filter plate (1.2) is provided with an air inlet (1.2.8) and an air inlet channel (1.7). The air inlet channel (1.7) is connected to the diaphragm filter chamber (1.3) through the air inlet guide hole (1.2.9). The diaphragm filter chamber (1.3) is provided with honeycomb-shaped coal gasification slag (28). Gas-liquid flow channels (1.5) are evenly arranged on the diaphragm filter plate (1.2). The capillary water (28.1) and interstitial water (28.2) in the coal gasification slag (28) are pressed into the gas-liquid flow channels (1.5). The bottom of the diaphragm filter plate (1.2) is provided with a guide hole (1.2.2) and a confluence cavity. (1.2.3) and filtrate outlet (1.2.4), guide hole (1.2.2) and manifold (1.2.3) and filtrate outlet (1.2.4) are interconnected. The diaphragm filter plate (1.2) is also provided with exhaust guide port (1.2.10) and bottom exhaust port (1.2.11) and exhaust channel (1.8) for discharge, and connected to the induced draft fan (4). The attached water (28.3) and internal water (28.4) in the coal gasification slag (28) enter the bottom exhaust port (1.2.11) through the exhaust guide port (1.2.10) of the diaphragm filter plate (1.2).

10. A high-temperature heat pump, filter press, and air compressor coupled drying device according to claim 9, characterized in that: The air-water heat exchange pressure tank (2) is equipped with an air-water heat exchange pipe (9), and the hot air outlet of the air-water heat exchange pressure tank (2) is connected to the frontmost air inlet (1.2.8).

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