Solar heat collection sludge drying system

Abstract

The invention discloses a solar heat collection sludge drying system which comprises a sludge heating chamber, the sludge heating chamber is communicated with a sludge air drying chamber through a communication channel, a hot liquid heating interlayer is arranged outside the sludge heating chamber, the hot liquid heating interlayer is communicated with a solar hot liquid heat collector, and the sludge air drying chamber is communicated with a solar hot air heat collector. The solar drying technology has the beneficial effects that solar radiation energy is directly utilized, a hot liquid (heat conduction oil) circulating system and a hot air supply system are combined, the sludge treatment energy consumption is remarkably reduced, and the solar drying technology has the advantages of environmental protection and economy; in the solar heat liquid collector, the contact area between a medium and the heat collection wing plate is increased, sufficient heat exchange between the medium and the heat collection wing plate is achieved, and the heat collection effect is improved; a heat collection air duct is formed in the solar hot air collector, cold air is converted into hot air to be sent out of the heat preservation box, and green and environment-friendly hot air is provided for subsequent drying, drying, heating and other procedures.

Description

Technical Field

[0001] This application belongs to the technical field of sludge treatment, and particularly relates to a solar heat collection sludge drying system. Background Technique

[0002] With the acceleration of urbanization and the popularization of sewage treatment technology, the global sludge production has been continuously rising. The moisture content of the surplus sludge generated after sewage treatment is as high as 75%-85%, with a large volume and containing a large amount of organic matter, heavy metals and pathogens. If directly landfilled or stacked in the open without effective treatment, it is easy to cause environmental problems such as soil pollution, eutrophication of underground water bodies and diffusion of malodorous gases. How to achieve sludge reduction, harmlessness and resource utilization has become the core problem to be solved urgently in the field of environmental governance.

[0003] Traditional sludge drying technologies mainly rely on heat sources such as hot air drying, steam heating or fossil fuel combustion, and have the following defects: High energy consumption: The heat drying technology requires 800-1060 kWh of electricity to evaporate 1 ton of water, and the operating cost is high; Secondary pollution: Fossil fuel combustion releases greenhouse gases such as CO2, and high-temperature treatment is prone to generate harmful gases (such as H2S, NH3), and tail gas purification devices need to be equipped; Limited efficiency: The moisture content of the sludge after mechanical dewatering is still high (about 60%-80%), making it difficult to directly incinerate or utilize for resource; Site dependence: The natural drying method has a long cycle, large floor area, and is restricted by climate conditions.

[0004] In recent years, low-temperature drying technologies have gradually emerged, such as heat pump drying, biological drying, etc. However, these technologies still rely on electric energy or auxiliary fuels and are difficult to fundamentally solve the energy consumption problem. In this context, the integrated application of renewable energy has become the key breakthrough point, especially solar energy, a clean and sustainable energy form. Summary of the Invention

[0005] The purpose of this application is: This application provides a solar heat collection sludge drying system, which solves problems such as high energy consumption and secondary pollution of traditional sludge drying.

[0006] The purpose of this application is achieved through the following technical solutions:

[0007] A solar heat collection sludge drying system includes a sludge heating chamber, the sludge heating chamber is communicated with a sludge air drying chamber through a communication channel, a hot liquid heating interlayer is arranged outside the sludge heating chamber, the hot liquid heating interlayer is communicated with a solar hot liquid collector, and the sludge air drying chamber is communicated with a solar hot air collector.

[0008] Further, heating chamber blades for conveying and stirring are arranged in the sludge heating chamber, and air drying chamber blades for conveying and stirring are arranged in the sludge air drying chamber.

[0009] Furthermore, the solar thermal liquid collector is connected to the rear end of the liquid heating sandwich through an interlayer liquid inlet pipe, and the solar thermal liquid collector is connected to the front end of the liquid heating sandwich through an interlayer liquid outlet pipe. The solar hot air collector is connected to the air inlet of the sludge drying chamber at the rear end, and an air outlet of the drying chamber is provided at the front end of the sludge drying chamber.

[0010] Furthermore, the solar thermal liquid collector includes a liquid thermal insulation box and a liquid main pipe therein. Heat collection wing plates are provided on the side of the liquid main pipe, and a heat collection blue film is provided on the upper surfaces of the liquid main pipe and the heat collection wing plates. Shunt holes are provided at both the inlet end and the outlet end of the liquid main pipe, and a shunt cavity extending along the pipe direction is provided inside the heat collection wing plate. The shunt holes at both ends are respectively communicated with both ends of the shunt cavity, and a flow blocking structure is provided inside the liquid main pipe, which is located behind the shunt hole at the inlet end along the flow direction.

[0011] Furthermore, the flow blocking structure includes a flow blocking protrusion and a flow blocking ball. The flow blocking protrusion is provided on the liquid main pipe and clamps the flow blocking ball in the front-back direction along the pipe.

[0012] Furthermore, an inner partition plate arranged along the pipe direction is provided in the middle of the shunt cavity, and the inner partition plate divides the middle part of the shunt cavity into at least two unit cavities.

[0013] Furthermore, a liquid inlet pipe and a liquid outlet pipe inside the liquid thermal insulation box are also included. The liquid inlet pipe is connected to one end of a plurality of liquid main pipes, and the liquid outlet pipe is connected to the other end of a plurality of liquid main pipes.

[0014] Furthermore, the solar hot air collector includes a hot air insulation box and a bottom layer substrate therein. A surface blue film is provided on the upper surface of the bottom layer substrate. An air inlet channel and an air outlet channel are provided inside the hot air insulation box. Air outlet holes are provided on the air inlet channel, and air inlet holes are provided on the air outlet channel. A hot air collecting channel located on the lower surface of the bottom layer substrate is formed between the air outlet holes and the air inlet holes.

[0015] Furthermore, the air inlet channel is of an L-shaped structure. One end of the air inlet channel is located on the left side of the hot air insulation box and is arranged flush with the side, and the other end of the air inlet channel is located on the front side of the hot air insulation box and is arranged flush with the side. The air outlet channel is of a straight-line structure and is located on the right side of the hot air insulation box and is arranged flush with the side. The air inlet channel is communicated with an air inlet pipe joint, and the air inlet pipe joint extends out from the lower right corner of the hot air insulation box. The air outlet channel is communicated with an air outlet pipe joint, and the air outlet pipe joint extends out from the upper right corner of the hot air insulation box.

[0016] Furthermore, a plurality of air outlet holes arranged at intervals are provided on the air inlet channel, and a plurality of air inlet holes arranged at intervals are provided on the air outlet channel. The air outlet holes and the air inlet holes are arranged oppositely.

[0017] Advantages of the present application:

[0018] (1) The solar drying technology significantly reduces the energy consumption of sludge treatment by directly utilizing solar radiant energy and combining a heat transfer fluid (thermal oil) circulation system and a hot air supply system, and has both environmental and economic advantages.

[0019] (2) In the solar heat transfer fluid collector, a flow distribution cavity is formed inside the heat collection wing plate to divert the medium fluid in the main heat transfer fluid pipe into the flow distribution cavity. The medium in the flow distribution cavity is in direct contact with the heat collection wing plate, increasing the contact area between the medium and the heat collection wing plate, achieving sufficient heat exchange between the medium and the heat collection wing plate, and improving the heat collection effect.

[0020] (3) A hot air collection duct is formed inside the solar hot air collector. Cold air enters the insulation box and absorbs the heat obtained by the solar energy inside the insulation box through the hot air collection duct. The cold air turns into hot air and is sent out of the insulation box, providing green and environmentally friendly hot air for subsequent drying, drying, heating and other processes.

[0021] The foregoing main solution of the present application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in the present application; and in the present application, (each non-conflicting alternative) alternatives and other alternatives can also be freely combined. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present application, all of which are the technical solutions to be protected in the present application, and will not be enumerated herein. Description of the Drawings

[0022] Figure 1 is the structural schematic diagram of the present application.

[0023] Figure 2 is the internal structural schematic diagram of the solar heat transfer fluid collector of the present application.

[0024] Figure 3 is the overall structural schematic diagram of the solar heat transfer fluid collector of the present application.

[0025] Figure 4 is the front view of the structure of the heat collection plate core of the solar heat transfer fluid collector of the present application.

[0026] Figure 5 is the top view of the structure of the heat collection plate core of the solar heat transfer fluid collector of the present application.

[0027] Figure 6 is the bottom view of the structure of the heat collection plate core of the solar heat transfer fluid collector of the present application.

[0028] Figure 7 is the structural schematic diagram of the flow resistance structure in the heat collection plate core of the solar heat transfer fluid collector of the present application.

[0029] Figure 8 is the top view of the internal structure of the solar hot air collector of the present application.

[0030] Figure 9 This is the top view of the external structure of the solar hot air collector of this application.

[0031] Figure 10 This is the bottom view of the intake and outlet channel structure of the solar hot air collector of this application.

[0032] Figure 11 This is the sectional view of the intake and outlet channel structure of the solar hot air collector of this application.

[0033] In the figure: 1 - sludge heating chamber, 2 - hot liquid heating interlayer, 3 - solar hot liquid collector, 4 - connecting channel, 5 - sludge air-drying chamber, 6 - solar hot air collector; 101 - heating chamber blade, 201 - interlayer inlet pipe, 202 - interlayer outlet pipe, 501 - air-drying chamber blade, 502 - air-drying chamber air inlet, 503 - air-drying chamber air outlet; 301 - hot liquid heat preservation box, 302 - hot liquid inlet pipe, 303 - hot liquid outlet pipe, 304 - hot liquid main pipe, 305 - heat collection wing plate, 306 - heat collection blue film, 307 - flow resistance protrusion, 308 - flow resistance ball, 309 - shunt hole, 310 - shunt cavity, 311 - inner partition board, 312 - unit cavity; 601 - hot air heat preservation box, 602 - bottom substrate, 603 - surface blue film, 604 - intake channel, 605 - outlet channel, 606 - intake pipe joint, 607 - outlet pipe joint, 608 - air outlet hole, 609 - air inlet hole. Detailed implementation mode

[0034] The following non-restrictive embodiments are used to illustrate this application.

[0035] Embodiment 1

[0036] Refer to Figure 1 As shown, a solar heat collection sludge drying system includes a sludge heating chamber 1, a hot liquid heating interlayer 2, a solar hot liquid collector 3, a connecting channel 4, a sludge air-drying chamber 5 and a solar hot air collector 6.

[0037] The temperature in the sludge heating chamber 1 is 100 - 130 °C, which is used for the preliminary heating and drying of sludge. The outside of the sludge heating chamber 1 is provided with a hot liquid heating interlayer 2, and the hot liquid heating interlayer 2 provides heat for the heating chamber from outside to inside. The relatively high-temperature hot liquid provides a higher temperature, which can evaporate most of the water in the sludge. The sludge heating chamber 1 is provided with heating chamber blades 101 for conveying and stirring. The heating chamber blades 101 stir the sludge to ensure sufficient heating and drying, and at the same time continuously convey the sludge to the rear end.

[0038] The bottom of the rear end of the sludge heating chamber 1 is communicated with the bottom of the front end of the sludge air-drying chamber 5 through a communication channel 4. After the sludge is preliminarily dried in the heating chamber, it enters the sludge air-drying chamber 5 for secondary air-drying. The temperature in the sludge air-drying chamber 5 is 85 - 110 °C, and relatively low-temperature hot air continuously blows over the sludge to blow out as much of the remaining moisture in the sludge as possible. In the sludge air-drying chamber 5, there are air-drying chamber blades 501 for conveying and stirring. The air-drying chamber blades 501 stir the sludge to ensure sufficient contact between the air flow and the sludge, and at the same time continuously convey the sludge to the rear end.

[0039] The hot liquid heating interlayer 2 is communicated with the solar hot liquid collector 3, and the sludge air-drying chamber 5 is communicated with the solar hot air collector 6. Both the solar hot liquid collector 3 and the solar hot air collector 6 absorb solar energy to heat the liquid or gas, so as to provide hot liquid or hot air for different processes of sludge drying.

[0040] The solar hot liquid collector 3 is communicated with the rear end of the hot liquid heating interlayer 2 through an interlayer inlet pipe 201, and the solar hot liquid collector 3 is communicated with the front end of the hot liquid heating interlayer 2 through an interlayer outlet pipe 202. The solar hot air collector 6 is communicated with the air-drying chamber air inlet 502 at the rear end of the sludge air-drying chamber 5, and there is an air-drying chamber air outlet 503 at the front end of the sludge air-drying chamber 5. Then the flow direction of the hot liquid / hot air is opposite to the conveying direction of the sludge, and the countercurrent heat exchange method is used to improve the heat exchange effect.

[0041] Reference Figures 2 to 7 As shown, the solar hot liquid collector 3 includes a hot liquid insulation box 301, a hot liquid inlet pipe 302, a hot liquid outlet pipe 303, a hot liquid main pipe 304, a heat collection wing plate 305, a heat collection blue film 306, a flow blocking structure (flow blocking protrusions 307 and flow blocking balls 308), a shunt hole 309, a shunt cavity 310, an inner partition 311 and a unit cavity 312.

[0042] The hot liquid main pipe 304 is made of aluminum alloy, with a pipe diameter of 4 - 8 mm and a wall thickness of 0.4 - 0.8 mm, and is used for the circulation and heat absorption of the medium. The medium uses heat transfer oil, and other fluids can also be used. The side of the hot liquid main pipe 304 is provided with a heat collection wing plate 305, which is also made of aluminum alloy, with a width of 35 - 45 mm and a plate thickness of 0.4 - 0.8 mm. The heat collection wing plate 305 is used to expand the solar energy receiving area to absorb as much solar energy as possible.

[0043] The hot liquid main pipe 304 and the heat collection wing plate 305 are made of an integrally extruded aluminum alloy material, which is convenient for processing and manufacturing. The pipe length of the hot liquid main pipe 304 is greater than the length of the heat collection wing plate 305 to realize the relative extension of the hot liquid main pipe 304 at both ends. Heat collection wing plates 305 are provided on both sides of the hot liquid main pipe 304, and the heat collection wing plates 305 on both sides are symmetrically arranged, that is, the hot liquid main pipe 304 is arranged in the middle to support the heat collection wing plates 305 on both sides.

[0044] The upper surfaces of the hot liquid main pipe 304 and the heat collecting wing plates 305 are provided with a heat collecting blue film 306. The heat collecting blue film is a solar selective absorption vacuum coating, which is plated on a metal substrate by using physical vapor deposition technology and the vacuum magnetron sputtering method. It belongs to a new generation of solar energy utilization technology, has a very high absorption rate for solar radiant energy, and its own emissivity is very low, which can effectively improve the solar thermal conversion efficiency. The heat absorbed by the blue film is directly transferred to the hot liquid main pipe 304 and the heat collecting wing plates 305.

[0045] Shunt holes 309 located on both sides of the pipe wall are opened at the inlet end and the outlet end of the hot liquid main pipe 304. Shunt cavities 310 along the pipe direction are opened inside the heat collecting wing plates 305 on both sides, and the two ends of the shunt holes 309 at both ends are respectively communicated with the two ends of the shunt cavity 310. The width of the shunt cavity 310 is 25 - 35 mm, and it does not completely occupy the width of the heat collecting wing plate 305, and the height inside the cavity is 2.5 - 3.5 mm.

[0046] Then the medium enters the hot liquid main pipe 304 from the inlet end, is shunted to both sides from the shunt holes at the inlet end into the shunt cavity 310, flows backward in the shunt cavity 310, then converges again into the hot liquid main pipe 304 through the shunt holes at the outlet end, and is discharged from the outlet end. Due to the arrangement of the shunt cavity 310, the flow channel of the medium is increased, direct contact between the medium and the heat collecting wing plate 305 is achieved, the heat exchange area is greatly increased, the heat exchange and heat transfer effect of the overall plate core is improved, and the discharged temperature of the medium reaches 100 - 130 °C.

[0047] A flow blocking structure is provided in the hot liquid main pipe 304, which is located behind the shunt hole 309 at the inlet end along the flow direction. The flow blocking structure is used to block the fluid in the hot liquid main pipe 304, so that the medium can be shunted from the shunt hole 309 into the shunt cavity 310, rather than all directly passing through the hot liquid main pipe 304.

[0048] The flow blocking structure completely closes the hot liquid main pipe 304 or leaves a shunt gap. That is, the flow blocking structure completely closes the hot liquid main pipe 304, and the medium does not pass through the middle section of the hot liquid main pipe 304 but only flows through the heat collecting wing plate 305. This method wastes the heat exchange area of the middle section of the hot liquid main pipe 304. Or the flow blocking structure does not completely close the hot liquid main pipe 304, and part of the medium still flows through the middle section of the hot liquid main pipe 304 through the shunt gap for heat absorption, realizing reasonable medium shunting and sufficient heat exchange.

[0049] The upper surface of the heat collection wing plate 305 is a flat surface, which is convenient for processing and manufacturing and also for coating the heat collection blue film, forming a large-area heat absorption surface. The outer side of the lower surface of the heat collection wing plate 305 is a flat surface, maintaining the straight plate structure on the outer side of the wing plate. The inner side of the lower surface of the heat collection wing plate 305 is a boss, and the boss is the space protruding from the internal flow dividing cavity. The lower surface of the boss is flush with the lower end of the main pipe, and the outside of the boss is transitioned to the outer flat surface through an arc, which is convenient for processing and manufacturing and ensures the structural strength. The outer side of the heat collection wing plate 305 is integrally extended with a downward flange, and the flange serves as a rib to improve the structural strength.

[0050] The flow blocking structure includes a flow blocking protrusion 307 and a flow blocking ball 308. The flow blocking protrusion 307 is provided on the hot liquid main pipe 304 and axially clamps the flow blocking ball 308 before and after along the pipe, that is, the flow blocking protrusion 307 is the pipe wall protruding inwardly into the pipe, and the protrusion is used to limit the flow blocking ball 308 before and after, ensuring the flow blocking effect of the ball under the impact of the fluid. The flow blocking ball is a steel ball, and the diameter of the flow blocking ball 308 is smaller than the inner diameter of the hot liquid main pipe 304, thus leaving a flow dividing gap.

[0051] An inner partition 311 arranged along the pipe axis is provided in the middle of the flow dividing cavity 310. The inner partition 311 and the heat collection wing plate 305 are of an integral structure of the same material. The inner partition 311 divides the middle part of the flow dividing cavity 310 into at least two unit cavities 312. In this example, specifically two unit cavities 312. The unit cavities 312 further divide the medium in the flow dividing cavity 310, ensuring the uniform and stable flow of the internal medium and ensuring a good heat transfer effect.

[0052] One hot liquid inlet pipe 302 and one hot liquid outlet pipe 303 are provided respectively on both sides of the hot liquid heat preservation box 301. The hot liquid inlet pipe 302 is welded to one end of several hot liquid main pipes 304, and the hot liquid outlet pipe 303 is welded to the other end of several hot liquid main pipes 304. Then the low-temperature medium enters from the hot liquid inlet pipe 302, and then is divided and flows into several hot liquid main pipes 304 and their heat collection wing plates 305 to absorb heat, and then converges to the hot liquid outlet pipe 303 and is discharged.

[0053] The heat collection blue film 306 faces the transparent glass plate of the hot liquid heat preservation box 301. Then sunlight passes through the transparent glass plate and irradiates on the heat collection blue film 306. The heat collection blue film 306 absorbs the heat energy of sunlight and directly contacts the medium through the hot liquid main pipe 304 and the heat collection wing plate 305, realizing the full heating of the medium.

[0054] Pipe joints extending out of the hot liquid heat preservation box 301 are provided on both the hot liquid inlet pipe 302 and the hot liquid outlet pipe 303. They are used for pipeline connection to ensure the normal flow of the medium. The collectors can be used in parallel. Then pipe joints are welded at both ends of the hot liquid inlet pipe 302 and the hot liquid outlet pipe 303 to achieve parallel connection. For the individual use of the collector and the collectors at the parallel ends, the pipe joints on the hot liquid inlet pipe 302 or the hot liquid outlet pipe 303 need to be blocked, or directly welded with plugs.

[0055] Reference Figures 8 to 11 As shown, the solar hot air collector 6 includes a hot air insulation box 601, a bottom substrate 602, a surface blue film 603, an air inlet channel 604, an air outlet channel 605, an air inlet connector 606, an air outlet connector 607, air outlet holes 608 and air inlet holes 609.

[0056] The hot air insulation box 601 is a box with a cuboid structure, used to accommodate and place other components, which can reduce the loss of internal heat to the outside and increase the heat absorption of the gas inside. Since the box is ventilated, the hot air insulation box 601 needs to maintain a good sealing effect. The transparent glass plate is the window of the hot air insulation box 601, which also has a heat preservation effect and is used for the penetration of sunlight.

[0057] A bottom substrate 602 is provided inside the hot air insulation box 601. The bottom substrate 602 is used to provide a large, flat and smooth surface to realize the coating of the heat collection film. At the same time, the bottom substrate 602 is also used to transfer the heat absorbed by the surface heat collection film to the gas on the lower surface.

[0058] The bottom substrate 602 is made of aluminum alloy, which has good thermal conductivity and structural strength. The bottom substrate 602 is a flat plate structure or a flat plate structure with several arc-shaped protrusions arranged on it to ensure a flat and smooth plate structure, which is convenient for processing and manufacturing, and also convenient for coating the heat collection film, and is also beneficial to form a large-area heat collection surface.

[0059] A surface blue film 603 opposite to the transparent glass plate is provided on the upper surface of the bottom substrate 602. The surface blue film is a solar selective absorption vacuum coating, which is deposited on a metal substrate by using physical vapor deposition technology and the vacuum magnetron sputtering method. It is a new generation of solar energy utilization technology, which has a very high absorption rate of solar radiation energy, and its own emissivity is very low, which can effectively improve the solar thermal conversion efficiency.

[0060] An air inlet channel 604 and an air outlet channel 605 are fixedly provided inside the hot air insulation box 601. The air inlet channel 604 is used to send cold air into the box body, and the air outlet channel 605 is used to send the hot air after heat absorption out of the box body. An air outlet hole 608 is provided on the air inlet channel 604, and the cold air is dispersed into the hot air collection channel through the air outlet hole 608 for heat absorption. An air inlet hole 609 is provided on the air outlet channel 605, and the hot air converges and returns from the hot air collection channel through the air inlet hole 609 to be sent for other uses.

[0061] A hot air collection channel located on the lower surface of the bottom substrate 602 is formed between the air outlet holes 608 and the air inlet holes 609. That is, after the gas enters the box body, it needs to flow through the hot air collection channel. During this process, the gas contacts the lower surface of the bottom substrate 602 to realize temperature rise, and the heat absorbed by the heat collection film is transferred to the gas. The discharged gas temperature reaches 85 - 110 °C.

[0062] Both the intake channel 604 and the outlet channel 605 are made of aluminum alloy, which has a lower cost and ensures good thermal conductivity and structural strength. Both the intake channel 604 and the outlet channel 605 are rectangular pipes, so as to provide a pipeline with a large flow cross-section inside the box body and realize the treatment of a large flow of gas.

[0063] The intake channel 604 is of an L-shaped structure. One end (the left end) of the intake channel 604 is located on the left side of the hot air insulation box 601 and arranged flush with the side, and the other end (the front end) of the intake channel 604 is located on the front side of the hot air insulation box 601 and arranged flush with the side. The outlet channel 605 is of a straight-line structure and is located on the right side of the hot air insulation box 601 and arranged flush with the side. The specific placement and fixation of the intake channel 604 and the outlet channel 605 in the rectangular box body are realized, which is convenient for intake and outlet from the same side.

[0064] The right end of the other end (the front end) of the intake channel 604 is communicated with the intake pipe joint 606, and the intake pipe joint 606 extends out from the lower right corner of the hot air insulation box 601. The upper end of the outlet channel 605 is communicated with the outlet pipe joint 607, and the outlet pipe joint 607 extends out from the upper right corner of the hot air insulation box 601. Intake from the lower right side and outlet from the upper right side are realized. This form conforms to the arrangement form of the intake and outlet pipe joints of most collectors and ensures the universality of the device.

[0065] A number of air outlet holes 608 are arranged at equal intervals on the intake channel 604, and a number of air inlet holes 609 are arranged at equal intervals on the outlet channel 605 to realize the uniform dispersion or convergence of gas. The air outlet holes 608 and the air inlet holes 609 are arranged opposite to each other, which ensures direct flow between the air outlet holes 608 and the air inlet holes 609, with a short path and no obstruction.

[0066] The foregoing basic examples and their respective further selection examples of the present application can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in the present application. In the solution of the present application, each selection example can be arbitrarily combined with any basic example and selection example.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A solar heat collection sludge drying system, comprising a sludge heating chamber (1), characterized in that: The described sludge heating chamber (1) is connected to the sludge air-drying chamber (5) through a communication channel (4). The outside of the sludge heating chamber (1) is provided with a hot liquid heating interlayer (2), and the hot liquid heating interlayer (2) is connected to a solar hot liquid collector (3). The sludge air-drying chamber (5) is connected to a solar hot air collector (6).

2. The solar heat collection sludge drying system according to claim 1, characterized in that: The sludge heating chamber (1) is provided with heating chamber blades (101) for conveying and stirring, and the sludge air-drying chamber (5) is provided with air-drying chamber blades (501) for conveying and stirring.

3. The solar heat collecting sludge drying system according to claim 1 or 2, characterized in that: The solar hot liquid collector (3) is connected to the rear end of the hot liquid heating interlayer (2) through an interlayer inlet pipe (201), and the solar hot liquid collector (3) is connected to the front end of the hot liquid heating interlayer (2) through an interlayer outlet pipe (202). The solar hot air collector (6) is connected to an air-drying chamber air inlet (502) at the rear end of the sludge air-drying chamber (5), and an air-drying chamber air outlet (503) is provided at the front end of the sludge air-drying chamber (5).

4. The solar heat collecting sludge drying system according to claim 1, wherein: The solar hot liquid collector (3) includes a hot liquid heat preservation box (301) and a hot liquid main pipe (304) therein. A heat collection wing plate (305) is provided on the side of the hot liquid main pipe (304). A heat collection blue film (306) is provided on the upper surfaces of the hot liquid main pipe (304) and the heat collection wing plate (305). Shunt holes (309) are provided at both the inlet end and the outlet end of the hot liquid main pipe (304). A shunt cavity (310) along the pipe direction is provided inside the heat collection wing plate (305). The shunt holes (309) at both ends are respectively connected to both ends of the shunt cavity (310). A flow resistance structure is provided in the hot liquid main pipe (304) that is located behind the shunt hole (309) at the inlet end along the flow direction.

5. The solar heat collecting sludge drying system according to claim 4, characterized in that: The flow resistance structure includes a flow resistance protrusion (307) and a flow resistance ball (308). The flow resistance protrusion (307) is provided on the hot liquid main pipe (304) and clamps the flow resistance ball (308) in the front and back directions along the pipe.

6. The solar heat collecting sludge drying system according to claim 4 or 5, characterized in that: An inner partition plate (311) arranged along the pipe direction is provided in the middle of the shunt cavity (310), and the inner partition plate (311) divides the middle part of the shunt cavity (310) into at least two unit cavities (312).

7. The solar heat collecting sludge drying system according to claim 4, wherein: It also includes a hot liquid inlet pipe (302) and a hot liquid outlet pipe (303) in the hot liquid heat preservation box (301). The hot liquid inlet pipe (302) is connected to one end of several hot liquid main pipes (304), and the hot liquid outlet pipe (303) is connected to the other end of several hot liquid main pipes (304).

8. The solar heat collecting sludge drying system according to claim 1, wherein: The solar hot air collector (6) includes a hot air heat preservation box (601) and a bottom substrate (602) therein. A surface blue film (603) is provided on the upper surface of the bottom substrate (602). An air inlet channel (604) and an air outlet channel (605) are provided in the hot air heat preservation box (601). Air outlet holes (608) are provided on the air inlet channel (604), and air inlet holes (609) are provided on the air outlet channel (605). A hot air collection channel is formed between the air outlet holes (608) and the air inlet holes (609) on the lower surface of the bottom substrate (602).

9. The solar heat collection sludge drying system according to claim 8, characterized in that: The described intake passage (604) is of an L-shaped structure. One end of the intake passage (604) is located on the left side of the hot air insulation box (601) and is arranged flush with the side edge. The other end of the intake passage (604) is located on the front side of the hot air insulation box (601) and is arranged flush with the side edge. The outlet passage (605) is of a straight-line structure. The outlet passage (605) is located on the right side of the hot air insulation box (601) and is arranged flush with the side edge. The intake passage (604) communicates with the intake pipe joint (606), and the intake pipe joint (606) extends out from the lower right corner of the hot air insulation box (601). The outlet passage (605) communicates with the outlet pipe joint (607), and the outlet pipe joint (607) extends out from the upper right corner of the hot air insulation box (601).

10. The solar energy collecting sludge drying system according to claim 8 or 9, characterized in that: A number of spaced-apart air outlet holes (608) are provided on the described intake passage (604), and a number of spaced-apart air inlet holes (609) are provided on the outlet passage (605). The air outlet holes (608) and the air inlet holes (609) are arranged opposite to each other.

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