Sludge airing tower utilizing solar energy

Abstract

The invention discloses a sludge airing tower utilizing solar energy. The sludge airing tower comprises a tower bottom heat storage water tank; the light-transmitting glass housing is arranged at the top of the tower bottom heat storage water tank; the multiple layers of rotatable annular drying discs are arranged in an inner cavity of the light-transmitting glass cover shell at intervals from top to bottom, the multiple layers of rotatable annular drying discs are arranged in a step shape which is gradually lowered from the center to the outside, and a sludge input port and a damp and hot waste gas outlet are formed in the upper portion of the rotatable annular drying disc on the highest layer; each layer of rotatable annular drying disc is provided with a sludge falling opening; the sludge dispersers are arranged corresponding to each layer of rotatable annular drying disc and are used for dispersing sludge on the corresponding rotatable annular drying disc when the rotatable annular drying disc rotates and moving the sludge to a sludge falling opening of the rotatable annular drying disc so as to enable the sludge to fall to the next layer; the hot air inlet pipe penetrates through the tower bottom heat storage water tank, and a hot air outlet of the hot air inlet pipe is communicated with the bottom of the inner cavity of the light-transmitting glass housing.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to a sludge drying tower utilizing solar energy. Background Art

[0002] The existing industrial wastewater sludge still contains 60-80% water after filtration, which is not conducive to storage and transportation. In addition, the hazardous waste sludge contains more toxic and harmful gases, which has a greater impact on environmental pollution during storage and transportation.

[0003] Among the related technologies of sludge deep drying process, electric energy and steam heating are mainly used, which have the problems of high energy consumption and low economy.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgement or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0005] Purpose of the invention: The technical problem to be solved by the present invention is to provide a sludge drying tower using solar energy to reduce energy consumption and improve economic efficiency in view of the shortcomings of the prior art.

[0006] In order to solve the above technical problems, the present invention discloses a sludge drying tower using solar energy, which comprises:

[0007] Hot water storage tank at the bottom of the tower;

[0008] A light-transmitting glass cover shell disposed on the top of the water storage tank at the bottom of the tower;

[0009] Multiple layers of rotatable annular drying disks are arranged in the inner cavity of the light-transmitting glass cover shell from top to bottom, and the multiple layers of rotatable annular drying disks are arranged in a stepped manner from the center to the outside, the rotatable annular drying disk with the largest outer diameter is the lowest layer, and the rotatable annular drying disk of the highest layer is provided with a sludge input port and a wet hot exhaust gas outlet above; each layer of the rotatable annular drying disk is provided with a sludge drop port;

[0010] A sludge disperser is provided corresponding to each layer of the rotatable annular drying disk, and the sludge disperser is used to disperse the sludge on the corresponding rotatable annular drying disk when the rotatable annular drying disk rotates, and to move the sludge to the sludge drop port of the rotatable annular drying disk so as to drop the sludge onto the rotatable annular drying disk of the next layer;

[0011] And a hot air inlet pipe is arranged through the water storage tank at the bottom of the tower, and the hot air outlet of the hot air inlet pipe is communicated with the bottom of the inner cavity of the light-transmitting glass cover shell.

[0012] In some embodiments, the hot air outlet is disposed corresponding to a radial central region of the multi-layer rotatable annular drying disk.

[0013] In some embodiments, the width of each rotatable annular drying disk is consistent, and the outer diameter increases gradually from top to bottom; there is a 1 / 4 overlap of the width between two adjacent rotatable annular drying disks in the radial direction. The outer peripheral edge of the rotatable annular drying disk is provided with a rib.

[0014] In some embodiments, each of the rotatable annular drying disks is provided with a group of sludge drop openings, and the group of sludge drop openings are distributed in a circular array around the center of the rotatable annular drying disk; each of the sludge drop openings is located in an edge area of ​​1 / 4 of the ring width of the rotatable annular drying disk.

[0015] In some embodiments, a hot and humid waste gas outlet pipe, a fan, a waste gas treatment facility, a waste exhaust pipe and a circulating return air pipe are included, and the fan, the waste gas treatment facility, the waste exhaust pipe and the circulating return air pipe are all located outside the light-transmitting glass cover. The air inlet of the waste gas treatment facility is connected to the hot and humid waste gas outlet pipe, the hot and humid waste gas outlet pipe is connected to the hot and humid waste gas outlet, the purified gas outlet of the waste gas treatment facility is connected to the circulating return air pipe, and the circulating return air pipe is connected to the air inlet of the hot air inlet pipe; the waste outlet of the waste gas treatment facility is connected to the waste exhaust pipe; the fan is arranged on the hot and humid waste gas outlet pipe.

[0016] In some embodiments, a hot air compensator is further included, and the hot air compensator is arranged on the circulating return air duct and is located outside the light-transmitting glass cover shell.

[0017] In some embodiments, including:

[0018] A transverse fixed beam located above the rotatable annular drying disk at the highest level, the transverse fixed beam being arranged in a transverse direction and having two ends respectively fixedly connected to the light-transmitting glass cover shell;

[0019] The support column assembly in the tower comprises an inner column and an outer column rotatably sleeved on the outer side of the inner column, the upper end of the outer column is fixedly connected to the transverse fixed beam, and the lower end passes through the radial central area of ​​the multiple layers of the rotatable annular drying disk and is fixedly connected to the hot water storage tank at the bottom of the tower; a driving gear with external teeth is fixedly sleeved on the position of the inner column corresponding to the rotatable annular drying disk, and a driven gear with internal teeth is rotatably sleeved on the position of the outer column corresponding to the rotatable annular drying disk, and an opening is also opened on the outer column at the position corresponding to the rotatable annular drying disk, and the external teeth of the driving gear exposed from the opening are meshed with the internal teeth of the driven gear; each layer of the rotatable annular drying disk is coaxially fixedly sleeved on the driven gear through the corresponding disk fixing bracket; each sludge disperser is respectively fixedly connected to the outer column and is in close contact with the corresponding rotatable annular drying disk;

[0020] And a driving mechanism for driving the inner column to rotate.

[0021] In some embodiments, it also includes a sludge inlet, a sludge slicer, a sludge vertical conveyor and a sludge horizontal conveyor; the sludge inlet is connected to the sludge slicer, the sludge slicer is connected to the sludge vertical conveyor, the sludge vertical conveyor is connected to the sludge horizontal conveyor, and the sludge horizontal conveyor is connected to the sludge input port.

[0022] In some embodiments, it also includes a solar heat absorption tube, which is installed on the side of the inner wall of the transparent glass cover facing the sun and extends from top to bottom; the solar heat absorption tube stores water inside and is connected to the water storage tank at the bottom of the tower.

[0023] In some embodiments, a sludge output mechanism is included, and the sludge output mechanism is located below the rotatable annular drying disk at the lowest level; the sludge output mechanism is used to receive the dried sludge and output it outside the inner cavity of the light-transmitting glass cover shell.

[0024] Beneficial effects:

[0025] 1. The present application utilizes solar energy to directly dry the sludge, and at the same time utilizes a heat storage tank at the bottom of the tower to heat the hot air that enters the bottom of the chamber to take away the moisture from the sludge, thereby making full use of solar energy.

[0026] 2. The present application arranges the multi-layer rotatable annular drying disk in a stepped arrangement that gradually descends from the center to the outside, and the rotatable annular drying disk with the largest outer diameter is the lowest layer. Compared with vertical multi-layer circular drying disks with equal diameter, the rotatable and stepped arrangement can better receive sunlight; at the same time, the empty setting in the middle can better facilitate the upward drying of hot air from the bottom, forming a smooth flow field, thereby removing moisture faster.

[0027] 3. A sludge slicer is added to ensure that the sludge can be evenly dispersed and easily moved from the inside to the outside after entering the drying tower. It is also more conducive to the volatilization of water, avoiding scaling and the inability to release water inside large pieces of sludge.

[0028] 4. Multiple rake-type sludge dispersers are installed, combined with the rotatable annular drying disk to slowly rotate, so that the sludge fragments are gradually dispersed and transferred from the middle to the outer edge. After reaching the sludge drop port arranged on the edge of the drying disk, it falls freely to the inner diameter position of the lower drying disk by gravity. The operation is simple and no additional energy consumption is required.

[0029] 5. A hot air compensator is added to the hot air inlet pipe, and the hot air temperature can be increased by external steam or electric heating when it is lower than 65°C, so that the sludge drying tower of the present application is suitable for application scenarios where sludge drying is required when it is continuously rainy or the sunlight utilization effect is poor, so that the equipment can be used around the clock to prevent sludge accumulation from causing inconvenience to users. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more clear.

[0031] Figure 1 A main cross-sectional view of a sludge drying tower utilizing solar energy is provided as an embodiment of the present invention.

[0032] Figure 2 For along Figure 1 Cross-section along line AA.

[0033] Figure 3 for Figure 2 Schematic diagram of the use status of the sludge disperser for dispersing sludge;

[0034] Figure 4 for Figure 1 A cross-sectional view of the assembly structure of the tower support assembly, the disc fixing bracket and the rotatable annular drying disc in the sludge drying tower is shown.

[0035] Description of reference numerals:

[0036] 1. Translucent glass cover; 2. Tower support assembly; 202, inner column; 201, outer column; 3. Horizontal fixed beam; 4. Sunlight heat absorption pipe; 5. Wet and hot exhaust gas outlet pipe; 6. Fan; 7. Exhaust gas treatment facilities; 8. Waste exhaust pipe; 9. Circulating return air pipe; 10. Sludge slicer; 11. Sludge inlet; 12. Sludge horizontal conveyor; 13. Sludge vertical conveyor; 14. Hot air inlet pipe; 15. Rotatable annular drying disk; 16, hot water storage tank at the bottom of the tower; 17, sludge disperser; 171, scraper rod; 172, arc scraper; 173, connecting rod; 18, hot air compensator; 19, sludge output mechanism; 20, hot air outlet; 21, sludge drop port; 22, disk fixing bracket; 24, sludge input port; 25, wet hot exhaust gas outlet; 26, driven gear; 27, driving gear; 28, opening. DETAILED DESCRIPTION

[0037] Example 1

[0038] This embodiment discloses a sludge drying tower using solar energy. Figure 1 As shown, the sludge drying tower includes a light-transmitting glass cover 1, a hot water storage tank 16 at the bottom of the tower, a multi-layer rotatable annular drying disk 15, a sludge disperser 17 and a hot air inlet pipe 14.

[0039] like Figure 1 As shown, the tower bottom hot water storage tank 16 is arranged at the bottom of the light-transmitting glass cover shell 1. More specifically, the tower bottom hot water storage tank 26 covers the bottom opening of the light-transmitting glass cover shell 1 to close the inner cavity of the light-transmitting glass cover shell 1.

[0040] like Figure 1 As shown, multiple layers of rotatable annular drying discs 15 are arranged in the inner cavity of the light-transmitting glass cover 1 from top to bottom in a vertical direction. The multiple layers of rotatable annular drying discs 15 are arranged in a stepped manner from the center to the outside, and the rotatable annular drying disc 15 with the largest outer diameter is the lowest layer. A sludge input port 24 and a wet hot exhaust gas outlet 25 are arranged above the rotatable annular drying disc 15 of the highest layer. Each layer of the rotatable annular drying disc 15 is provided with a sludge drop port 21.

[0041] like Figure 1 As shown, the sludge disperser 17 is arranged corresponding to each layer of the rotatable annular drying disk 15, and the sludge disperser 17 and the light-transmitting glass cover 1 of the support assembly in the tower remain relatively still. The sludge disperser 17 is used to disperse the sludge on the corresponding rotatable annular drying disk when the rotatable annular drying disk 15 of the support assembly in the tower rotates, and to move the sludge to the sludge drop port 21 of the rotatable annular drying disk so as to drop the sludge onto the rotatable annular drying disk of the next layer.

[0042] like Figure 1As shown, the hot air inlet pipe 14 is arranged through the water storage tank 16 at the bottom of the tower, and the hot air outlet 20 of the hot air inlet pipe 14 is connected to the bottom of the inner cavity of the light-transmitting glass cover shell 1.

[0043] When in use, sunlight passes through the light-transmitting glass cover shell 1 to directly dry and heat the sludge on the multi-layer rotatable annular drying disk 15, and the heat is sealed in the tower by the light-transmitting glass cover shell 1; part of the heat is absorbed by the water storage tank 16 at the bottom of the tower, and the hot air in the hot air inlet pipe 14 flows through the water storage tank 16 at the bottom of the tower for heat exchange and temperature rise, and the heated hot air flows out through the hot air outlet 20 located at the bottom of the inner cavity of the light-transmitting glass cover shell 1 and flows to the multi-layer rotatable annular drying disk 15, and the multi-layer rotatable annular drying disk 15 is blown dry from bottom to top.

[0044] Compared with the use of vertical multi-layer circular drying disks with equal diameter, the present application arranges multiple layers of rotatable annular drying disks 15 in a stepped arrangement that gradually decreases from the center to the outside, and the rotatable annular drying disk 15 with the largest outer diameter is the lowest layer. The stepped arrangement makes the rotatable annular drying disks 15 extremely low in obstruction, and can more effectively receive sunlight, especially direct sunlight; since sunlight is unidirectional, the backlit side of the fixed drying disk is exposed to very little sunlight, and the sludge drying speed is also very slow. By setting the rotatable annular drying disk 15 rotatable, all parts of the rotatable annular drying disk 15 in the circumferential direction can receive sunlight; at the same time, the stepped arrangement is more conducive to the formation of a smooth flow field for the bottom hot air when it is blown upward for drying, thereby removing moisture from the sludge more quickly.

[0045] In addition, the rotation of the rotatable annular drying disk 15 also causes the dispersed sludge on it to gradually disperse. The angular movement of the rotatable annular drying disk 15 replaces the radial movement of the scraper blade, etc., so that the internal sludge fragments are continuously moved outward by the sludge disperser 17 until they reach the sludge drop port 21 when the rotatable annular drying disk 15 rotates, and then fall under the action of gravity.

[0046] In order to ensure that the rotatable annular drying disk 15 of the next layer can receive the sludge fragments falling from the sludge drop opening 21 of the upper side, Figure 1 As shown, each layer of rotatable annular drying discs 15 is arranged horizontally. The projections of two adjacent rotatable annular drying discs 15 on the horizontal plane partially overlap in the radial direction. The sludge drop port 21 is opened in the overlapping area between the rotatable annular drying disc 15 where it is located and the rotatable annular drying disc 15 of the next layer.

[0047] In some embodiments, the rotatable annular drying disc 15 and the sludge disperser 17 are both made of corrosion-resistant metal materials, such as stainless steel.

[0048] The rotatable annular drying disc 15 and the sludge disperser 17 made of anti-corrosion metal materials are suitable for treating hazardous waste sludge containing highly corrosive components such as acid and alkali.

[0049] In some embodiments, Figure 1 As shown, the hot air outlet 20 is arranged corresponding to the radial center area of ​​the multi-layer rotatable annular drying disk 15.

[0050] It should be understood that the corresponding arrangement here means that, from a top view, Figure 2 As shown, the hot air outlet 20 is located inside the inner circle of the rotatable annular drying disk 15 at the lowest level.

[0051] When the multi-layer rotatable annular drying disk 15 rotates, the hot air outlet 20 is arranged in the hollow area of ​​the rotatable annular drying disk 15, so as to facilitate the transportation of hot air from bottom to top and transfer heat to each rotatable annular drying disk 15; combined with the slow rotation of the rotatable annular drying disk 15, the hot air entering the hollow area flows outward along the radial direction of the multiple rotatable annular drying disks 15, so that the hot air and the sludge can effectively exchange heat.

[0052] More specifically, if Figure 1 As shown, a plurality of hot air outlets 20 can be provided, and the plurality of hot air outlets 20 are distributed around the central annular array of the rotatable annular drying disk 15, so that the plurality of hot air outlets 20 can cover multiple directions of the radial central area of ​​the multi-layer rotatable annular drying disk 15, and maintain the stability of the hot air flow field from bottom to top, without causing gas turbulence inside the glass tower, causing sludge fragments and dust formed in the sludge drying process to be scattered everywhere; at the same time, it is also convenient for adjusting the wind force, and the wind volume can be adjusted according to the solar energy utilization effect.

[0053] like Figure 1 As shown, the sludge drying tower also includes a sludge output mechanism 19, which is located below the lowest rotatable annular drying disc 15. The sludge output mechanism 19 is used to receive the dried sludge and output it outside the inner cavity of the light-transmitting glass cover. Specifically, the sludge output mechanism 19 can adopt a flat plate, chain or plate frame conveyor. Since the structure of the sludge output mechanism 19 itself is not the main improvement point of the present application and belongs to the prior art, it will not be repeated in the present application.

[0054] like Figure 1 As shown, the sludge drying tower also includes a sunlight heat absorption pipe 4, which is installed on the inner wall of the light-transmitting glass cover 1 facing the sun and extending from top to bottom. The outer layer of the water storage tank 16 at the bottom of the tower is blackened stainless steel, and water is stored in the middle. The sunlight heat absorption pipe 4 stores water inside and the bottom end is connected to the water storage tank 16 at the bottom of the tower.

[0055] In this embodiment, the heat is enclosed in the tower by the transparent glass cover 1, and part of the heat is transferred to the heat storage tank 16 at the bottom of the tower and the sunlight heat absorption tube 4. The heat storage tank 16 at the bottom of the tower and the sunlight heat absorption tube 4 jointly play a role in heat storage.

[0056] like Figure 1 As shown, the sludge drying tower also includes a wet hot exhaust gas outlet pipe 5, a waste gas treatment facility 7 and a circulating return air pipe 9, the air inlet of the waste gas treatment facility 7 is connected to the wet hot exhaust gas outlet pipe 5, the wet hot exhaust gas outlet pipe 5 is connected to the wet hot exhaust gas outlet 25, the purified gas outlet of the waste gas treatment facility 7 is connected to the circulating return air pipe 9, and the circulating return air pipe 9 is connected to the air inlet of the hot air inlet pipe 14. It should be understood that the waste gas treatment facility 7 is also connected to a waste exhaust pipe 8.

[0057] In this embodiment, the water-containing hot and humid waste gas in the inner cavity of the light-transmitting glass cover 1 is discharged into the waste gas treatment facility 7 through the hot and humid waste gas outlet pipe 5 for treatment to remove toxic and harmful substances and moisture. The waste gas after the toxic and harmful substances and moisture are removed by the waste gas treatment facility 7 flows out from the waste gas treatment facility 7, then flows into the circulating return air pipe 9 and the hot air inlet pipe 14, flows through the bottom water storage tank 16 for heat exchange and temperature rise, and obtains the heated hot air. The heated hot air is then blown to the inner cavity of the light-transmitting glass cover 1 by the hot air outlet 20, and the hot air heats the sludge on the multi-layer rotatable annular drying disk from bottom to top to obtain water-containing hot and humid waste gas. The obtained water-containing hot and humid waste gas then flows into the hot and humid waste gas outlet pipe 5 from the hot and humid waste gas outlet 25, thereby realizing the function of hot air drying and the recycling of hot air. The toxic and harmful substances can be in the form of liquid or gas, and are discharged from the waste exhaust pipe 8 after being released.

[0058] like Figure 1 As shown, the wet and hot exhaust gas outlet 25 can be directly opened on the top of the transparent glass cover 1, or one end of the wet and hot exhaust gas outlet pipe 5 can be extended into the top of the inner cavity of the transparent glass cover 1 as the wet and hot exhaust gas outlet 25.

[0059] like Figure 1 As shown, the sludge drying tower also includes a fan 6, which is arranged on the wet and hot exhaust gas outlet pipe 5 to form a negative pressure atmosphere in the inner cavity of the light-transmitting glass cover shell 1 and discharge the wet and hot exhaust gas containing toxic and harmful gases.

[0060] like Figure 1 As shown, the sludge drying tower further includes a hot air compensator 18 , which is disposed on the circulating return air duct 9 and outside the light-transmitting glass cover 1 .

[0061] When the hot air temperature is lower than 65° C., the hot air compensator 18 of this embodiment is heated by external steam or electric heating to be suitable for situations where sludge drying is required during continuous rainy weather and when the sunlight utilization effect is poor.

[0062] like Figure 3 As shown, the sludge disperser 17 includes a dispersion head and a scraper rod 171, wherein the dispersion head includes a plurality of arc-shaped scrapers 172, and the plurality of arc-shaped scrapers 172 are arranged in parallel and spaced apart and all form an angle with the peripheral tangent direction of the rotatable annular drying disk 15. The top ends of the plurality of arc-shaped scrapers 172 are all fixedly connected to the connecting rod 173, and the ends of the plurality of arc-shaped scrapers 172 away from the connecting rod 173 are all in close contact with the corresponding rotatable annular drying disk 15. One end of the scraper rod 171 is connected to the connecting rod 173, and the other end is fixedly connected to the support assembly 2 in the tower. It should be understood that the outer end of the arc-shaped scraper 172 closest to the outer edge of the rotatable annular drying disk 15 should be close to the retaining edge of the rotatable annular drying disk 15.

[0063] See also Figure 3 , taking the dispersion head with four arc-shaped scrapers 172 as an example, a sludge conveying channel is formed between two adjacent arc-shaped scrapers 172. Starting from the middle, a first sludge conveying channel from the middle to a position 1 / 4 of the distance from the middle is formed between the first arc-shaped scraper and the second arc-shaped scraper. During the rotation of the rotatable annular drying disk 15, the sludge in the middle of the rotatable annular drying disk 15 is continuously transferred from the middle position to a position 1 / 4 of the distance from the middle through this first sludge conveying channel. Similarly, a second sludge conveying channel is formed between the second arc-shaped scraper and the third arc-shaped scraper, and the sludge is further conveyed outward until it reaches the sludge drop port 21 at the edge, and then falls under the action of gravity.

[0064] In order to realize the multi-layer rotatable annular drying disk 15, the multi-layer rotatable annular drying disk 15 is arranged in an interval from top to bottom in the inner cavity of the light-transmitting glass cover shell 1. Figure 1 As shown, the sludge drying tower includes a transverse fixed beam 3, an inner tower support assembly 2, a disc fixing bracket 22 and a driving mechanism.

[0065] See also Figure 1 The transverse fixed beam 3 is located above the rotatable annular drying disk 15 of the highest layer and is arranged in the transverse direction. Both ends of the transverse fixed beam 3 are fixedly connected to the light-transmitting glass cover shell 1 respectively.

[0066] See also Figure 4The support column assembly 2 in the tower includes an inner column 202 and an outer column 201 rotatably sleeved on the outer side of the inner column 202. The upper end of the outer column 201 is fixedly connected to the transverse fixed beam 3, and the lower end passes through the radial central area of ​​the multi-layer rotatable annular drying disk 15 and is fixedly connected to the hot water storage tank 16 at the bottom of the tower. A driving gear 27 with external teeth is fixedly sleeved at the position corresponding to the rotatable annular drying disk 15 on the inner column 202, and a driven gear 26 with internal teeth is rotatably sleeved at the position corresponding to the rotatable annular drying disk 15 on the outer column 201. An opening 28 is also provided at the position corresponding to the rotatable annular drying disk 15 on the outer column 201. The external teeth of the driving gear 27 of the support column assembly in the tower that are exposed from the opening of the outer column 201 are meshed with the internal teeth of the driven gear 26 of the support column assembly in the tower. Each layer of rotatable annular drying disk 15 is coaxially fixedly sleeved on the driven gear 26 through the corresponding disk fixing bracket 22. Each sludge disperser 17 is fixedly connected to the outer column 201 and is in close contact with the corresponding rotatable annular drying disc 15. The driving mechanism is configured to drive the inner column 202 to rotate. Specifically, the driving mechanism can be a motor. For the convenience of showing, a driving gear 27 with external teeth is fixedly sleeved at a position corresponding to the rotatable annular drying disc 15 on the inner column 202. Figure 4 Only the top two layers of rotatable annular drying disks 15 and part of the outer column 201 are shown.

[0067] The number of the sludge dispersers 17 can be adjusted as needed, and can be four sludge dispersers 17 evenly spaced around the support assembly 2 in the tower.

[0068] In order to better convey and dry sludge, Figure 1 As shown, the sludge drying tower may further include a sludge inlet 11, a sludge slicer 10, a sludge vertical conveyor 13, and a sludge horizontal conveyor 12. The sludge inlet 11 is connected to the sludge slicer 10, the sludge slicer 10 is connected to the sludge vertical conveyor 13, the sludge vertical conveyor 13 is connected to the sludge horizontal conveyor 12, and the sludge horizontal conveyor 12 is connected to the sludge input port 24. In this embodiment, the sludge slicer 10 is used to transform the sludge into thin sheets for better transportation and drying.

[0069] In a specific embodiment, if Figure 1 As shown in FIG. 1 , the outer diameter of each rotatable annular drying disk 15 increases gradually from top to bottom, but the width of the rotatable annular drying disk 15 remains unchanged. The projections of two adjacent rotatable annular drying disks 15 on the horizontal plane overlap by 1 / 4 of the ring width in the radial direction. A rib is provided on the outer peripheral edge of each rotatable annular drying disk 15, and the height of the rib can be 1 cm. Figure 2As shown, each rotatable annular drying disk 15 is provided with a group of sludge drop openings 21, which are distributed in an annular array around the center of the rotatable annular drying disk 15, and each sludge drop opening 21 is an arc-shaped through groove. Each sludge drop opening 21 is located in the outer ring edge area of ​​1 / 4 of the ring width of the rotatable annular drying disk 15. When the rotatable annular drying disk 15 rotates, as shown in FIG. Figure 3 As shown, the sludge disperser 17 can disperse the sludge and make it evenly distributed on the rotatable annular drying disk 15, and push the sludge to the sludge drop port 21 after rotating 3 circles. The sludge falls through the sludge drop port 21 to the rotatable annular drying disk 15 of the next layer under the action of gravity.

[0070] Below, refer to Figure 1 , the method of using the sludge drying tower of this embodiment in the sludge drying process is explained.

[0071] The hazardous waste sludge that meets the requirements is introduced into the sludge slicer 10 through the sludge inlet 11, crushed into thin flakes by the sludge slicer 10, and then transported to the sludge input port 24 through the sludge vertical conveyor 13 and the sludge horizontal conveyor 12, and then falls from the sludge input port 24 to the topmost rotatable annular drying disk 15. Multiple rotatable annular drying disks 15 rotate slowly in the same direction, and the sludge disperser 17 evenly spreads the sludge on the corresponding rotatable annular drying disks 15.

[0072] After the gas in the circulating return air duct 9 is heated by the hot air compensator 18 and the water storage tank 16 at the bottom of the tower, it is blown into the inner cavity of the light-transmitting glass cover 1 through the hot air duct outlet 20 in the tower, and the sludge on the multi-layer rotatable annular drying disk 15 is blown from bottom to top to remove the moisture in the sludge. The water-containing hot and humid gas volatilized by the sludge is discharged out of the inner cavity of the light-transmitting glass cover 1 through the hot and humid waste gas outlet duct 5. Outside the light-transmitting glass cover 1, the fan 6 arranged on the hot and humid waste gas outlet duct 5 extracts the water-containing hot and humid gas and sends it to the waste gas treatment facility 7 to remove moisture and toxic and harmful substances. The waste gas after removing moisture and toxic and harmful substances passes through the circulating return air duct 9, the hot air compensator 18, and the hot air inlet pipe 14 in sequence and is reused in the inner cavity of the light-transmitting glass cover 1.

[0073] After the rotatable annular drying disc 15 rotates a certain number of times, for example, three times, the sludge disperser 17 pushes the sludge to the sludge drop port 21. The sludge falls to the middle position of the next rotatable annular drying disc 15 through the sludge drop port 21 under the action of gravity, and is then evenly dispersed by the sludge disperser 17 corresponding to the next rotatable annular drying disc 15. The dried sludge scraped off the lowest rotatable annular drying disc 15 falls directly onto the sludge output mechanism 19 and is transported out of the sludge drying tower for storage or disposal. The above process can be repeated until all the sludge is processed.

[0074] It should be understood that before the sludge disperser 17 pushes the sludge to the sludge drop port 21, the number of revolutions of the corresponding rotatable annular drying disk 15 can be adjusted according to actual conditions, for example, a certain number of revolutions can be selected so that the sludge drying tower takes into account both the drying treatment effect and the treatment efficiency.

[0075] In this application, hazardous waste sludge that meets the requirements refers to sludge that is not highly corrosive or dangerous enough to damage drying equipment, and its moisture content cannot be higher than 80%.

[0076] The present invention provides a concept and method for a sludge drying tower using solar energy. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A sludge drying tower using solar energy, characterized in that: include: A hot water storage tank (16) at the bottom of the tower; A light-transmitting glass cover (1) arranged on the top of the water storage tank (16) at the bottom of the tower; Multiple layers of rotatable annular drying discs (15) are arranged in an inner cavity of the light-transmitting glass cover (1) from top to bottom, and the multiple layers of rotatable annular drying discs (15) are arranged in a step-like manner from the center to the outside, the rotatable annular drying disc (15) with the largest outer diameter is the lowest layer, and the rotatable annular drying disc (15) at the highest layer is provided with a sludge input port (24) and a wet hot exhaust gas outlet (25); each layer of the rotatable annular drying disc (15) is provided with a sludge drop port (21); A sludge disperser (17) is arranged corresponding to each layer of the rotatable annular drying disk (15), and the sludge disperser (17) is used to disperse the sludge on the corresponding rotatable annular drying disk (15) when the rotatable annular drying disk rotates, and to move the sludge to the sludge drop port (21) of the rotatable annular drying disk so as to drop the sludge onto the rotatable annular drying disk of the next layer; And a hot air inlet pipe (14) is arranged through the hot water storage tank (16) at the bottom of the tower, and the hot air outlet (20) of the hot air inlet pipe (14) is connected to the bottom of the inner cavity of the light-transmitting glass cover shell (1).

2. The sludge drying tower using solar energy according to claim 1, characterized in that: The hot air outlet (20) is arranged corresponding to the radial central area of ​​the multi-layer rotatable annular drying disk (15).

3. The sludge drying tower using solar energy according to claim 1 or 2, characterized in that: The ring widths of the rotatable annular drying disks (15) are consistent, and the outer diameters gradually increase from top to bottom; there is a 1 / 4 overlap of the ring width between two adjacent rotatable annular drying disks (15) in the radial direction; and the outer peripheral edges of the rotatable annular drying disks (15) are provided with ribs.

4. The sludge drying tower using solar energy according to claim 3, characterized in that: The rotatable annular drying disk (15) is provided with a group of sludge drop openings (21), and the group of sludge drop openings (21) are distributed in a circular array around the center of the rotatable annular drying disk (15); each of the sludge drop openings (21) is located in an edge area of ​​1 / 4 of the ring width of the rotatable annular drying disk (15).

5. The sludge drying tower using solar energy according to claim 1 or 2, characterized in that: The invention comprises a wet hot waste gas outlet pipe (5), a fan (6), a waste gas treatment facility (7), a waste exhaust pipe (8) and a circulating return air pipe (9), wherein the air inlet of the waste gas treatment facility (7) is connected to the wet hot waste gas outlet pipe (5), the wet hot waste gas outlet pipe (5) is connected to the wet hot waste gas outlet (25), the purified gas outlet of the waste gas treatment facility (7) is connected to the circulating return air pipe (9), and the circulating return air pipe (9) is connected to the air inlet of the hot air inlet pipe (14); the waste outlet of the waste gas treatment facility (7) is connected to the waste exhaust pipe (8); and the fan (6) is arranged on the wet hot waste gas outlet pipe (5).

6. The sludge drying tower using solar energy according to claim 5, characterized in that: It also comprises a hot air compensator (18), which is arranged on the circulating return air duct (9) and is located outside the light-transmitting glass cover shell (1).

7. The sludge drying tower using solar energy according to claim 1 or 2, characterized in that: include: A transverse fixed beam (3) located above the rotatable annular drying disk (15) at the highest level, wherein the transverse fixed beam (3) is arranged in a transverse direction and both ends of the transverse fixed beam (3) are respectively fixedly connected to the light-transmitting glass cover shell (1); The tower support assembly (2) comprises an inner column (202) and an outer column (201) rotatably sleeved on the outer side of the inner column (202); the upper end of the outer column (201) is fixedly connected to the transverse fixed beam (3), and the lower end passes through the radial central area of ​​the multiple layers of the rotatable annular drying disk (15) and is fixedly connected to the tower bottom water storage tank (16); a driving gear (27) with external teeth is fixedly sleeved at a position on the inner column (202) corresponding to the rotatable annular drying disk (15); and a driving gear (27) with external teeth is fixedly sleeved at a position on the outer column (201) corresponding to the rotatable annular drying disk (15). A driven gear (26) with internal teeth is rotatably sleeved, and an opening (28) is also provided on the outer column (201) at a position corresponding to the rotatable annular drying disk (15), and the external teeth of the driving gear (27) exposed from the opening mesh with the internal teeth of the driven gear (26); each layer of the rotatable annular drying disk (15) is coaxially fixedly sleeved on the driven gear (26) through a corresponding disk fixing bracket (22); each sludge disperser (17) is respectively fixedly connected to the outer column (201) and is in close contact with the corresponding rotatable annular drying disk (15); And a driving mechanism for driving the inner column (202) to rotate.

8. The sludge drying tower using solar energy according to claim 1 or 2, characterized in that: It also includes a sludge inlet (11), a sludge slicer (10), a sludge vertical conveyor (13) and a sludge horizontal conveyor (12); the sludge inlet (11) is connected to the sludge slicer (10), the sludge slicer (10) is connected to the sludge vertical conveyor (13), the sludge vertical conveyor (13) is connected to the sludge horizontal conveyor (12), and the sludge horizontal conveyor (12) is connected to the sludge input port (24).

9. The sludge drying tower using solar energy according to claim 1 or 2, characterized in that: It also comprises a sunlight heat absorption tube (4), which is installed on the inner wall of the light-transmitting glass cover (1) on the side facing the sun and extends from top to bottom; the sunlight heat absorption tube (4) stores water inside and is connected to the water storage tank (16) at the bottom of the tower.

10. The sludge drying tower using solar energy according to claim 1 or 2, characterized in that: It comprises a sludge output mechanism (19), which is located below the rotatable annular drying disk (15) at the lowest level; the sludge output mechanism (19) is used to receive the dried sludge and output it outside the inner cavity of the light-transmitting glass cover shell.

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