Open type heat pump drying system for slurry resource utilization

Abstract

The invention discloses an open type heat pump drying system for slurry resource utilization. The open type heat pump drying system comprises a drying box body and an extrusion box body, and a spiral extruder is integrated in the extrusion box body; the air inlet group ring and the air outlet assembly are communicated with the drying box body; the system further comprises a heat pump assembly. A condenser is arranged in the air inlet assembly, a refrigerant is condensed in the condenser to release heat and heat air entering from the air inlet assembly, and strip-shaped materials in the drying box body are dried through the heated air. According to the heat pump drying system, a flexible feeding mode and an extrusion strip forming technology are adopted, slurry is dried and dried in a strip-shaped bundle forming mode, the feeding rate, the slurry form and the slurry size are controlled, the drying efficiency and effect of wet type slurry materials are improved, a sewage source heat pump system is connected, waste heat of sewage is recycled, and the energy-saving and environment-friendly effects are achieved. The waste of heat is reduced, and the use efficiency of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial and agricultural waste treatment and resource utilization, and in particular to an open heat pump drying system for slurry resource utilization. Background Art

[0002] Waste treatment and resource utilization in the industrial and agricultural sectors focus on the recycling of slurry waste and the application of environmentally friendly technologies. Efficiently recovering valuable components from waste through technologies like heat pump drying, while reducing resource waste and environmental pollution, has become a critical issue in industrial and agricultural production, providing an important path for a green and low-carbon transition.

[0003] In recent years, many industrial and agricultural processes have generated large amounts of slurry waste containing valuable components. Directly discharging this slurry waste would not only waste resources but also pollute the environment. Recycling slurry waste, combined with heat pump drying technology, can recover valuable components from the slurry during the drying process. This not only aligns with national policies supporting energy conservation, emission reduction, resource recycling, and green development, but also reduces carbon emissions during slurry processing.

[0004] In traditional drying equipment, uneven heating is prone to occur during the slurry drying process. When the slurry particles are large or clumpy, it is difficult for the internal moisture to dissipate, and the surface is over-dried. The contact area between the slurry and the drying medium is relatively small, the heat transfer efficiency is low, and the drying time is long, which cannot meet the needs of large-scale, high-efficiency slurry processing. When slurries of different sources and characteristics are dried in traditional drying equipment, due to the relatively fixed equipment parameters, it is difficult to flexibly adjust according to differences in slurry viscosity, moisture content, particle size, etc. The treatment effect of slurries with high viscosity or high moisture content is often very poor, and the expected drying goals cannot be achieved. Therefore, traditional drying equipment cannot achieve effective drying of wet slurries, affecting subsequent processing and utilization.

[0005] Therefore, based on the above technical problems, technicians in this field urgently need to develop an open heat pump drying system for slurry resource utilization. Summary of the Invention

[0006] The purpose of the present invention is to provide an open heat pump drying system for slurry resource utilization. The system adopts a flexible feeding method and extrusion technology to dry and dehumidify the slurry in the form of strips and bundles, thereby realizing the control of feeding rate, slurry form and size. It adopts a variety of heating and drying forms and combines crawler transmission to dry the moving wet slurry material, thereby improving the drying efficiency and effect of the wet slurry material. It connects to the sewage water source heat pump system to recycle the waste heat of the sewage, reduce heat waste, and improve the utilization efficiency of the device.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides an open heat pump drying system for slurry resource utilization, the system comprising:

[0009] A drying box body, wherein the drying box body has a crawler conveyor belt;

[0010] An extrusion box is provided at the upper end of the drying box and is in communication with the drying box, wherein a screw extruder is integrated inside the extrusion box, and the slurry material is extruded into a strip material by the screw extruder and transported into the drying box;

[0011] an air inlet and outlet assembly in communication with the drying box;

[0012] The system also includes:

[0013] heat pump components;

[0014] The air inlet and outlet components are divided into an air inlet component arranged at one end of the drying box body and an air outlet component arranged at the other end of the drying box body;

[0015] A condenser is provided in the air inlet assembly, and the refrigerant condenses in the condenser to release heat and heat the air entering the air inlet assembly, and the strip material in the drying box is dried by the heated air.

[0016] Furthermore, a strip material feed port is provided at the upper end of the drying box, the extrusion box is arranged at the strip material feed port of the drying box, and an extrusion orifice plate is installed at the strip material feed port;

[0017] A motor is provided on the upper portion of the extrusion box, an output shaft of the motor passes through the extrusion box and extends into the interior of the extrusion box, and the output shaft of the motor is connected to the screw extruder;

[0018] A sewage orifice plate is provided on the upper portion of the interior of the extrusion box, and the space above the sewage orifice plate of the extrusion box is a sewage discharge space, and the sewage discharge space is connected to a sewage drain port;

[0019] The other side of the extrusion box is connected to a feed port, and the feed port is located below the sewage orifice plate.

[0020] Furthermore, the crawler conveyor belt inside the drying box is driven by a power wheel to move the crawler belt thereon to transport materials;

[0021] An air inlet opening is provided at the upper portion of one end of the drying box, and the air inlet assembly is connected to the drying box through the air inlet opening;

[0022] An air outlet opening is provided at the lower portion of the other end of the drying box, and the air outlet assembly is connected to the drying box through the air outlet opening;

[0023] A discharge port is provided at the lower portion of the drying box.

[0024] Furthermore, the air inlet assembly includes:

[0025] An air inlet duct, wherein an equalizing plate is installed between the air inlet duct and the air inlet opening;

[0026] A filter is installed at the air inlet of the air inlet duct, and a filter is also installed inside the air inlet duct; and

[0027] A condenser and a fan are arranged in the air inlet duct.

[0028] Furthermore, the air outlet assembly includes:

[0029] An air outlet duct, wherein the drying box body is provided with a folding plate near the air outlet opening;

[0030] An adsorption area is provided in the air outlet duct.

[0031] Furthermore, the heat pump assembly includes:

[0032] compressor and evaporator;

[0033] The outlet of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the throttle valve through a pipe, the outlet of the throttle valve is connected to the inlet of the evaporator through a pipe, and the outlet of the evaporator is connected to the inlet of the compressor through a pipe.

[0034] Furthermore, the heat pump assembly includes:

[0035] a compressor, a first heat exchanger, and a second heat exchanger, wherein the second heat exchanger is installed in the air outlet duct;

[0036] The outlet of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the throttle valve through a pipeline, the outlet of the throttle valve is connected to the inlet of the first heat exchanger through a pipeline, and the outlet of the first heat exchanger is connected to the inlet of the compressor through a pipeline;

[0037] The water after heat exchange with the flue gas in the outlet duct through the second heat exchanger is connected to the water inlet of the first heat exchanger, and the water outlet of the first heat exchanger is connected to the water tank through a pump, and the water outlet of the water tank is connected to the water inlet of the second heat exchanger through a pipe.

[0038] In the above technical solution, the present invention provides an open heat pump drying system for slurry resource utilization, which has the following beneficial effects:

[0039] The heat pump drying system of the present invention adopts a flexible feeding method and extrusion technology to dry and dehumidify the slurry in the form of strips and bundles, thereby realizing the control of feeding rate, slurry form and size. It adopts various heating and drying forms and combines crawler transmission to dry the moving wet slurry material, thereby improving the drying efficiency and effect of the wet slurry material. It connects to the sewage water source heat pump system to recycle the waste heat of the sewage, reduce heat waste, and improve the utilization efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application 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 described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0041] Figure 1 This is a process flow chart of a first embodiment of an open heat pump drying system for slurry resource utilization disclosed in an embodiment of the present application;

[0042] Figure 2 This is a process flow chart of a second embodiment of an open heat pump drying system for slurry resource utilization disclosed in an example of this application.

[0043] Description of reference numerals:

[0044] 1. Drying box; 2. Extrusion box; 3. Motor; 4. Output shaft; 5. Screw extruder; 6. Sewage orifice plate; 7. Extrusion orifice plate; 8. Sewage outlet; 9. Feed inlet; 10. Power wheel; 11. Track; 12. Bracket; 13. Support device; 14. Folding plate; 15. Filter; 16. Filter; 17. Condenser; 18. Fan; 19. Equalizing plate; 20. Discharge port; 21. Adsorption zone; 22. Compressor; 23. Throttle valve; 24. Evaporator; 25. First heat exchanger; 26. Second heat exchanger; 27. Pump; 28. Water tank; 29. ​​Water outlet. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0046] See also Figures 1 to 2 As shown;

[0047] This embodiment discloses an open heat pump drying system for slurry resource utilization, which includes:

[0048] A drying box 1, wherein the drying box 1 has a crawler conveyor belt;

[0049] An extrusion box 2 is provided at the upper end of the drying box 1 and is in communication with the drying box 1. A screw extruder 5 is integrated inside the extrusion box 2. The slurry material is extruded into a strip material by the screw extruder 5 and is transported to the drying box 1.

[0050] An air inlet and outlet assembly connected to the drying box 1;

[0051] The system also includes:

[0052] heat pump components;

[0053] The air inlet and outlet components are divided into an air inlet component arranged at one end of the drying box 1 and an air outlet component arranged at the other end of the drying box 1;

[0054] A condenser 17 is provided in the air inlet assembly. The refrigerant condenses in the condenser 17 to release heat and heat the air entering the air inlet assembly. The heated air is used to dry the strip material in the drying box 1.

[0055] Specifically, this embodiment discloses an open heat pump drying system, which includes a drying chamber 1, an extrusion chamber 2 having a screw extruder 5, an air inlet assembly and an air outlet assembly respectively disposed at the air inlet and air outlet ends of the drying chamber 1, and a heat pump assembly of this embodiment. In this embodiment, the screw extruder 5 within the extrusion chamber 2 first extrudes the slurry into strips, which are then conveyed to a crawler conveyor within the drying chamber 1 and dried using hot air circulated by the air inlet and air outlet assemblies. After drying, the strips are discharged outside the drying chamber 1.

[0056] Preferably, the upper end of the drying box 1 of this embodiment is provided with a strip material feed port, the extrusion box 2 is arranged at the strip material feed port of the drying box 1, and an extrusion orifice plate 7 is installed at the strip material feed port;

[0057] In this embodiment, a motor 3 is provided on the upper portion of the extrusion box 1. The output shaft 4 of the motor 3 passes through the extrusion box 2 and extends into the interior of the extrusion box 2. The output shaft 4 of the motor 3 is connected to a screw extruder 5.

[0058] A sewage orifice plate 6 is provided at the upper portion of the interior of the extrusion box 2, and the space above the sewage orifice plate 6 of the extrusion box 2 is a sewage discharge space, and the sewage discharge space is connected to a sewage drain port 8;

[0059] The other side of the extrusion box 2 is connected to a feed port 9 , which is located below the sewage orifice plate 6 .

[0060] First, this embodiment further defines the structure and principle of the extrusion box 2 and the screw extruder 5 within it. The extrusion box 2 is positioned at the upper end of the drying box 1 and communicates with the drying box 1 via an extrusion orifice 7. A motor 3 at the upper end of the extrusion box 2 drives the screw extruder 5 to extrude the slurry material through the extrusion orifice 7 into strips, which are then conveyed to the crawler conveyor of the drying box 1 for drying and transportation. A sewage orifice 6 is installed at the upper portion of the extrusion box 2 in this embodiment, and sewage is discharged to the outside through a sewage outlet 8.

[0061] Preferably, the crawler conveyor belt inside the drying box 1 of this embodiment drives the crawler belt 11 thereon to move through the power wheel 10 to transport materials;

[0062] An air inlet opening is provided at the upper portion of one end of the drying box body 1, and the air inlet assembly is connected to the drying box body 1 through the air inlet opening;

[0063] An air outlet opening is provided at the lower portion of the other end of the drying box body 1, and the air outlet assembly is connected to the drying box body 1 through the air outlet opening;

[0064] A discharge port 20 is provided at the lower portion of the drying box 1 .

[0065] The material enters the extrusion box 2 from the feed port 9, and the motor 3 drives the screw extruder 5 through the output shaft 4 to extrude the slurry material. Since the moisture content of the material is between 65% and 75%, a portion of the sewage is squeezed out by squeezing, and the sewage is collected through the sewage orifice plate 6 and then discharged through the sewage outlet 8. Due to the extrusion orifice plate 7 of the screw extruder 5, the slurry passes through multiple cylindrical holes and vertically enters the air-drying area of ​​the drying box 1 in the form of strips and bundles. As the length of the slurry gradually increases, due to the influence of gravity, the slurry will fall onto the crawler 11 inside the drying box 1. After being collected by the crawler 11, the slurry is further dried on the crawler 11 until the slurry reaches the moisture content required for the product. In this embodiment, the air inlet end of the air outlet duct is provided with a folding plate 14. Under the action of the folding plate 14, the strip material can be prevented from entering the air outlet duct. The slurry is then dried and discharged through the discharge port 20.

[0066] Based on the structure of the above-mentioned drying box 1, the air inlet assembly of this embodiment includes an air inlet duct, an equalizing plate 19 is installed between the air inlet duct and the air inlet opening; a filter 15 is installed at the air inlet of the air inlet duct, and a filter 16 is also installed inside the air inlet duct; and a condenser 17 and a fan 18 are arranged in the air inlet duct.

[0067] Secondly, the air outlet assembly of this embodiment includes an air outlet duct. A folding plate 14 is provided near the air outlet opening of the drying box 1; and an adsorption area 21 is provided in the air outlet duct.

[0068] The external air is guided through the fan 3 of the air inlet duct and the filter 15 to prevent large foreign objects from entering the air inlet duct. When the air enters the air inlet duct, most of the particles can be removed after being filtered by the filter. After the dust particles are removed, the air passes through the condenser 17. Due to the condensation of the refrigerant, a large amount of heat is released. Through the heat exchange of the condenser 17, a large amount of heat is transferred to the air, raising its temperature. After being guided by the fan 18, the air enters the drying box 1. The hot air forms a uniform wind field through the wind plate 19. In the drying box 1, heat exchange is finally carried out with the strip material to dry its surface. Then the hot air continues to heat the slurry on its crawler 11 to dry it. After drying, the hot air is discharged through the air outlet duct at the other end of the drying box 1. The air outlet duct of this embodiment is provided with an adsorption area 21 to remove odor in the hot air.

[0069] See also Figure 1 As shown, Example 1:

[0070] As a first embodiment of the heat pump assembly of the present application: the heat pump assembly of the first embodiment includes a compressor 22 and an evaporator 24;

[0071] The specific process connection structure is: the outlet of the compressor 22 is connected to the inlet of the condenser 17, the outlet of the condenser 17 is connected to the inlet of the throttle valve 23 through a pipeline, the outlet of the throttle valve 23 is connected to the inlet of the evaporator 24 through a pipeline, and the outlet of the evaporator 24 is connected to the inlet of the compressor 22 through a pipeline.

[0072] In the heat pump assembly of the first embodiment of the present invention, the low-temperature, low-pressure liquid refrigerant in the evaporator 24 absorbs external heat and evaporates into a gaseous state. The compressor 22 compresses the gaseous refrigerant into a high-temperature, high-pressure state. In the condenser, the high-temperature, high-pressure gas releases heat to the air in the air inlet duct and condenses into a liquid state. The throttle valve 23 reduces the pressure and temperature of the liquid refrigerant, allowing it to re-enter the evaporator 24, completing the cycle and using the heat extracted from the outside to heat the air.

[0073] See also Figure 2 As shown, Example 2:

[0074] As a second embodiment of the heat pump assembly of the present application: the heat pump assembly of the second embodiment includes a compressor 22, a first heat exchanger 25, and a second heat exchanger 26, and the second heat exchanger 26 is installed in the air outlet duct;

[0075] The outlet of the compressor 22 is connected to the inlet of the condenser 17, the outlet of the condenser 17 is connected to the inlet of the throttle valve 23 through a pipeline, the outlet of the throttle valve 23 is connected to the inlet of the first heat exchanger 25 through a pipeline, and the outlet of the first heat exchanger 25 is connected to the inlet of the compressor 22 through a pipeline;

[0076] The water after heat exchange with the flue gas in the outlet duct through the second heat exchanger 26 is connected to the water inlet of the first heat exchanger 25, and the water outlet of the first heat exchanger 25 is connected to the water tank 28 through the pump 27, and the water outlet of the water tank 28 is connected to the water inlet of the second heat exchanger 26 through a pipe.

[0077] In the second embodiment, the compressor 22 compresses the gaseous refrigerant into a high-temperature and high-pressure state. In the condenser 17, the high-temperature and high-pressure gas releases heat to the air in the air inlet pipe and condenses into a liquid state. The throttle valve 23 reduces the pressure and temperature of the liquid refrigerant. In the first heat exchanger 25, the low-temperature and low-pressure liquid refrigerant absorbs the heat from the water in the second heat exchanger 26 and evaporates into a gaseous state, so that the gaseous refrigerant re-enters the compressor 22 to complete the cycle. The cold water passing through the first heat exchanger 25 enters the water tank 28 for storage through the pump 27, and the pump 27 pumps the cold water in its water tank 28 into the second heat exchanger 26.

[0078] In the above technical solution, the present invention provides an open heat pump drying system for slurry resource utilization, which has the following beneficial effects:

[0079] The heat pump drying system of the present invention adopts a flexible feeding method and extrusion technology to dry and dehumidify the slurry in the form of strips and bundles, thereby realizing the control of feeding rate, slurry form and size. It adopts various heating and drying forms and combines crawler transmission to dry the moving wet slurry material, thereby improving the drying efficiency and effect of the wet slurry material. It connects to the sewage water source heat pump system to recycle the waste heat of the sewage, reduce heat waste, and improve the utilization efficiency of the device.

[0080] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. An open heat pump drying system for slurry resource utilization, characterized in that: The system includes: A drying box (1), wherein the drying box (1) has a crawler conveyor belt; An extrusion box (2) is arranged at the upper end of the drying box (1) and is in communication with the drying box (1), and a screw extruder (5) is integrated inside the extrusion box (2). The slurry material is extruded into a strip material by the screw extruder (5) and is transported into the drying box (1); an air inlet and outlet assembly in communication with the drying box (1); The system also includes: heat pump components; The air inlet and outlet components are divided into an air inlet component arranged at one end of the drying box (1) and an air outlet component arranged at the other end of the drying box (1); A condenser (17) is provided in the air inlet assembly. The refrigerant condenses in the condenser (17) to release heat and heat the air entering the air inlet assembly. The heated air is used to dry the strip material in the drying box (1).

2. The open heat pump drying system for slurry resource utilization according to claim 1, characterized in that: The upper end of the drying box (1) is provided with a strip material feed port, the extrusion box (2) is arranged at the strip material feed port of the drying box (1), and an extrusion orifice plate (7) is installed at the strip material feed port; A motor (3) is provided on the upper portion of the extrusion box (2); an output shaft (4) of the motor (3) passes through the extrusion box (2) and extends into the interior of the extrusion box (2); and the output shaft (4) of the motor (3) is connected to the screw extruder (5); A sewage orifice plate (6) is provided at the upper portion of the interior of the extrusion box (2), and the space above the sewage orifice plate (6) of the extrusion box (2) is a sewage discharge space, and the sewage discharge space is connected to a sewage outlet (7); The other side of the extrusion box (2) is connected to a feed port (9), and the feed port (9) is located below the sewage orifice plate (6).

3. The open heat pump drying system for slurry resource utilization according to claim 2, characterized in that: The crawler conveyor belt inside the drying box (1) drives the crawler belt (11) thereon to move via the power wheel (10) to transport materials; An air inlet opening is provided at the upper portion of one end of the drying box (1), and the air inlet assembly and the drying box (1) are connected to the air inlet opening; An air outlet opening is provided at the lower portion of the other end of the drying box (1), and the air outlet assembly and the drying box (1) are connected to the air outlet opening; A discharge port (20) is provided at the lower portion of the drying box (1).

4. The open heat pump drying system for slurry resource utilization according to claim 3, characterized in that: The air inlet assembly comprises: An air inlet duct, wherein an equalizing plate (19) is installed between the air inlet duct and the air inlet opening; A filter (15) is installed at the air inlet of the air inlet duct, and a filter (16) is also installed inside the air inlet duct; and A condenser (17) and a fan (18) are arranged in the air inlet duct.

5. The open heat pump drying system for slurry resource utilization according to claim 4, characterized in that: The air outlet component includes: An air outlet duct, wherein the drying box (1) is provided with a folding plate (14) near the air outlet opening; An adsorption area (21) is provided in the air outlet duct.

6. The open heat pump drying system for slurry resource utilization according to claim 5, characterized in that: The heat pump assembly comprises: a compressor (22) and an evaporator (24); The outlet of the compressor (22) is connected to the inlet of the condenser (17), the outlet of the condenser (17) is connected to the inlet of the throttle valve (23) through a pipeline, the outlet of the throttle valve (23) is connected to the inlet of the evaporator (24) through a pipeline, and the outlet of the evaporator (24) is connected to the inlet of the compressor (22) through a pipeline.

7. The open heat pump drying system for slurry resource utilization according to claim 5, characterized in that: The heat pump assembly comprises: A compressor (22), a first heat exchanger (25), and a second heat exchanger (26), wherein the second heat exchanger (26) is installed in the air outlet duct; The outlet of the compressor (22) is connected to the inlet of the condenser (17), the outlet of the condenser (17) is connected to the inlet of the throttle valve (23) through a pipeline, the outlet of the throttle valve (23) is connected to the inlet of the first heat exchanger (25) through a pipeline, and the outlet of the first heat exchanger (25) is connected to the inlet of the compressor (22) through a pipeline; The water after heat exchange with the flue gas in the air outlet duct through the second heat exchanger (26) is connected to the water inlet of the first heat exchanger (25), and the water outlet of the first heat exchanger (25) is connected to the water tank (28) through a pump (27), and the water outlet of the water tank (28) is connected to the water inlet of the second heat exchanger (26) through a pipeline.

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