Waste heat recovery device for preparing ceramsite from industrial sludge

Abstract

The invention discloses a waste heat recovery device for preparing ceramsite from industrial sludge, and belongs to the field of ceramsite preparation. The waste heat recovery device comprises a machine base, a charging barrel is arranged on the machine base, the two ends of the charging barrel penetrate through the machine base and are rotationally installed on the machine base, a spiral part is arranged on the inner wall of the charging barrel, a combustion chamber is fixedly installed on the machine base, and a water tank is fixedly installed on the machine base; one side of the combustion chamber communicates with and is provided with a gas supply mechanism passing through the water tank, the other side of the combustion chamber communicates with and is provided with a smoke exhaust mechanism passing through the water tank, high-temperature smoke is guided into the water tank through the exhaust pipeline, heat in the smoke is conducted to water in the water tank through the exhaust pipeline, and then heat in the water is conducted to the gas inlet pipeline. When the high-temperature flue gas passes through the water tank, the heat of the high-temperature flue gas is conducted into the water, so that the waste heat of the flue gas is utilized, and the waste of energy is reduced. The preheated air enters the combustion chamber, extra heat needed in the combustion process is reduced, and therefore energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramsite preparation, and particularly to a waste heat recovery device for preparing ceramsite from industrial sludge. Background Art

[0002] Preparing ceramsite from industrial sludge is an effective way to recycle sludge. By converting industrial sludge into ceramsite, sludge reduction, harmlessness, and resource utilization can be achieved. Ceramsite is an artificial lightweight aggregate, usually made from raw materials such as clay, shale, fly ash, etc. through processes such as crushing, batching, pelletizing, and roasting. The principle of preparing ceramsite from industrial sludge is similar to that of conventional ceramsite production, but industrial sludge is added to the raw materials. During the roasting process, the organic matter in the sludge burns to produce gas, promoting the expansion of the ceramsite and forming a porous structure; the inorganic minerals form the skeleton of the ceramsite, providing strength.

[0003] During the sintering process of ceramsite, a large amount of high-temperature flue gas is generated in the rotary kiln, and this flue gas contains huge thermal energy. In the prior art, the waste heat of the flue gas in the system for preparing ceramsite from industrial sludge cannot be recovered. Waste heat of flue gas is a valuable secondary energy source. If not recovered, this thermal energy will be directly discharged into the atmosphere, causing huge energy waste. At the same time, enterprises have to rely on more fossil energy to meet production requirements, which will lead to an increase in production costs.

[0004] To solve the above problems, we propose a waste heat recovery device for preparing ceramsite from industrial sludge. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem that the large amount of high-temperature flue gas generated during the sintering process of ceramsite in the prior art cannot be reused for its waste heat, and to propose a waste heat recovery device for preparing ceramsite from industrial sludge.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A waste heat recovery device for preparing ceramsite from industrial sludge, including a machine base, a material cylinder is arranged on the machine base, both ends of the material cylinder penetrate through the machine base and are rotatably installed on the machine base, a spiral part is provided on the inner wall of the material cylinder, and both ends of the material cylinder are open.

[0007] A combustion chamber is fixedly installed on the machine base. The combustion chamber is located at the lower end of the barrel and is used for storing fuel. One end of the combustion chamber is open. An igniter is fixedly installed on the combustion chamber, and the ignition end of the igniter is located inside the combustion chamber. A water tank is fixedly installed on the machine base. The water tank is located at the lower end of the combustion chamber and is filled with water inside. A gas supply mechanism passing through the water tank is connected and installed on one side of the combustion chamber. The gas supply mechanism is connected to an external air pump and is used for introducing air into the combustion chamber. A flue gas exhaust mechanism passing through the water tank is connected and installed on the other side of the combustion chamber. The flue gas exhaust mechanism is connected to an external suction pump and is used for exhausting the flue gas in the combustion chamber.

[0008] Preferably, a driving mechanism is provided on the machine base. The driving mechanism is connected to the barrel and is used for driving the barrel to rotate.

[0009] Preferably, the driving mechanism includes a double-shaft motor. The double-shaft motor is fixedly installed on the machine base. A synchronous belt mechanism is installed at the output shaft end on one side of the double-shaft motor. The upper end of the synchronous belt mechanism is installed on the barrel. The double-shaft motor drives the barrel to rotate through the synchronous belt mechanism.

[0010] Preferably, the gas supply mechanism includes an intake pipe. The upper end of the intake pipe is connected and fixedly joined to the combustion chamber. There are multiple connection ports between the intake pipe and the combustion chamber. The lower end of the intake pipe passes through the water tank. The lower port of the intake pipe is connected to an external air pump, and the external air pump pumps air into the combustion chamber through the intake pipe.

[0011] Preferably, the flue gas exhaust mechanism includes multiple sleeves connected to the combustion chamber. The sleeves are fixedly installed on the combustion chamber. It also includes an exhaust pipe. The upper end of the exhaust pipe is provided with multiple ports. The upper end of the exhaust pipe is respectively inserted into the sleeves and remains in a connected state. The lower end of the exhaust pipe extends into the water tank. The exhaust pipe can slide horizontally. An annular plate is sleeved and fixedly connected on the exhaust pipe. A spring is sleeved outside the sleeve. Both ends of the spring are respectively fixedly connected to the annular plate and the combustion chamber. The lower end of the exhaust pipe is connected to an external suction pump, and the external suction pump extracts the flue gas in the combustion chamber through the exhaust pipe.

[0012] Preferably, the flue gas exhaust mechanism further includes a vibration assembly. The vibration assembly is installed in the water tank and is connected to the output shaft on the other side of the double-shaft motor. The vibration assembly is used for driving the exhaust pipe to vibrate.

[0013] Preferably, the vibration assembly includes an incomplete gear located in the water tank, the output shaft on the other side of the dual-axis motor extends into the water tank and is rotatably mounted on the water tank, the incomplete gear is fixedly connected to the output shaft end on the other side of the dual-axis motor, a heat conducting part is provided in the water tank, the heat conducting part is fixedly connected to the exhaust pipe, a tooth row part is provided on the heat conducting part, the tooth row part is meshed with the incomplete gear, a wear-resistant block is fixedly mounted on the inner wall of the water tank, and one end of the heat conducting part is attached to the wear-resistant block.

[0014] Preferably, a soundproof cover is fixedly installed in the water tank, the wear-resistant block is located in the soundproof cover, and one end of the heat conducting part penetrates into the soundproof cover and is slidably installed on the soundproof cover.

[0015] Preferably, friction parts are provided on both side walls of the other end of the heat-conducting part, and two vertical shafts arranged on both sides of the exhaust pipe are rotatably installed in the water tank, and a plurality of blades are fixedly connected to the vertical shafts. Friction wheels are fixedly installed on the upper ends of the vertical shafts, and the friction wheels located on the same side are tightly fitted with the friction parts and the transmission is transmitted through friction force.

[0016] Preferably, a water inlet for adding water is provided on the top of the water tank, a liquid level scale is provided on one side of the water tank, a temperature detector is installed on the water tank, slots are provided on both side walls of the open end of the combustion chamber, a sealing plate is provided at the open end of the combustion chamber, the sealing plate is used to seal the open end of the combustion chamber, and sliders are fixedly connected on both sides of the sealing plate, and the sliders can be inserted into the slots and can slide up and down.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The device introduces high-temperature flue gas into the water tank through the exhaust pipe. The heat in the flue gas is transferred to the water in the water tank through the exhaust pipe, and the heat in the water is transferred to the intake pipe, thereby preheating the air passing through the intake pipe. When the high-temperature flue gas passes through the water tank, the process of its heat being transferred to the water realizes the waste heat utilization of the flue gas and reduces energy waste. The preheated air enters the combustion chamber, reducing the additional heat required in the combustion process, thereby reducing energy consumption.

[0018] The device drives the heat transfer part to hit the wear-resistant block, causing the exhaust pipe to vibrate synchronously, assisting in separating the smoke and dust attachments on the inner wall of the exhaust pipe from the exhaust pipe, thereby making it difficult for smoke and dust attachments to form inside the exhaust pipe, allowing the exhaust pipe to maintain good thermal conductivity under long-term operation. The friction part on the heat transfer part synchronously drives multiple blades to rotate. During the rotation of the blades, the water in the water tank can be stirred, making the water temperature in the water tank more evenly distributed, thereby avoiding the problem of uneven temperature on both sides of the water tank, allowing the air in the exhaust pipe to absorb more heat, and improving the device's air preheating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Structural schematic of a waste heat recovery device for preparing ceramsite from industrial sludge proposed by the present invention Figure 1 ; Figure 2 Structural schematic of a waste heat recovery device for preparing ceramsite from industrial sludge proposed by the present invention Figure 2 ; Figure 3 Side view of a waste heat recovery device for preparing ceramsite from industrial sludge proposed by the present invention; Figure 4 Partial enlarged sectional view of the water tank in a waste heat recovery device for preparing ceramsite from industrial sludge proposed by the present invention Figure 1 ; Figure 5 Partial enlarged sectional view of the water tank in a waste heat recovery device for preparing ceramsite from industrial sludge proposed by the present invention Figure 2 ; Figure 6 Of a waste heat recovery device for preparing ceramsite from industrial sludge proposed by the present invention Figure 4 Enlarged schematic view of part A in; Figure 7 Partial enlarged sectional view of the sound insulation cover of a waste heat recovery device for preparing ceramsite from industrial sludge proposed by the present invention.

[0020] In the figure: machine base 1, material cylinder 2, spiral part 3, combustion chamber 4, igniter 5, water tank 6, double-shaft motor 7, synchronous belt mechanism 8, intake pipe 9, sleeve 10, exhaust pipe 11, annular plate 12, spring 13, tooth row part 14, wear-resistant block 15, sound insulation cover 16, friction part 17, vertical shaft 18, blade 19, friction wheel 20, water filling port 21, incomplete gear 22, heat conduction part 23, slot 24, plugging plate 25, slider 26. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1 Refer to Figures 1-7, A waste heat recovery device for preparing ceramsite from industrial sludge, comprising a machine base 1. A material cylinder 2 is arranged on the machine base 1. Both ends of the material cylinder 2 penetrate through the machine base 1 and are rotatably installed on the machine base 1. A spiral part 3 is provided on the inner wall of the material cylinder 2, and both ends of the material cylinder 2 are open. The raw ceramsite is placed at one end of the material cylinder 2. By rotating the material cylinder 2, the spiral part 3 inside it is driven to rotate, and the rotation of the spiral part 3 can transport the raw ceramsite to the other end of the material cylinder 2.

[0023] Among them, a combustion chamber 4 is fixedly installed on the machine base 1. The combustion chamber 4 is located at the lower end of the material cylinder 2 and is used for storing fuel. One end of the combustion chamber 4 is open. An igniter 5 is fixedly installed on the combustion chamber 4, and the ignition end of the igniter 5 is located inside the combustion chamber 4. A water tank 6 is fixedly installed on the machine base 1. The water tank 6 is located at the lower end of the combustion chamber 4 and is filled with water inside. A gas supply mechanism passing through the water tank 6 is connected and installed on one side of the combustion chamber 4. The gas supply mechanism is connected to an external air pump and is used for introducing air into the combustion chamber 4. A flue gas exhaust mechanism passing through the water tank 6 is connected and installed on the other side of the combustion chamber 4. The flue gas exhaust mechanism is connected to an external suction pump and is used for discharging the flue gas in the combustion chamber 4.

[0024] Among them, a driving mechanism is arranged on the machine base 1. The driving mechanism is connected to the material cylinder 2 and is used for driving the material cylinder 2 to rotate. The driving mechanism includes a double-shaft motor 7. The double-shaft motor 7 is fixedly installed on the machine base 1. A synchronous belt mechanism 8 is installed at the output shaft end on one side of the double-shaft motor 7. The upper end of the synchronous belt mechanism 8 is installed on the material cylinder 2. The double-shaft motor 7 drives the material cylinder 2 to rotate through the synchronous belt mechanism 8.

[0025] The double-shaft motor 7 works and drives the material cylinder 2 to rotate through the synchronous belt mechanism 8. By rotating the material cylinder 2, the spiral part 3 inside it is driven to rotate, and the rotation of the spiral part 3 can transport the raw ceramsite to the other end of the material cylinder 2. By adding fuel into the combustion chamber 4 from the open end thereof, the fuel in the combustion chamber 4 is ignited by the igniter 5. The upper end of the combustion chamber 4 is in contact with the bottom of the material cylinder 2, and the contact surfaces of both are polished. The contact positions of both are made of heat-conducting metal with good heat conductivity. The heat generated by the combustion of the combustion chamber 4 is efficiently conducted to the material cylinder 2. The raw ceramsite in the material cylinder 2 is sintered by the combustion chamber 4.

[0026] Among them, the air supply mechanism includes an intake pipe 9, the upper end of the intake pipe 9 is connected and fixedly connected to the combustion chamber 4, there are multiple communication ports between the intake pipe 9 and the combustion chamber 4, the lower end of the intake pipe 9 passes through the water tank 6, and the lower port of the intake pipe 9 is connected to an external air pump. The external air pump pumps air into the combustion chamber 4 through the intake pipe 9. The flue gas exhaust mechanism includes multiple sleeves 10 communicated with the combustion chamber 4, the sleeves 10 are fixedly installed on the combustion chamber 4, and further includes an exhaust pipe 11. The upper end of the exhaust pipe 11 is provided with multiple ports, the upper ends of the exhaust pipe 11 are respectively inserted into the sleeves 10 and kept in a communicating state, the lower end of the exhaust pipe 11 extends into the water tank 6, the exhaust pipe 11 can slide horizontally, an annular piece 12 is sleeved and fixedly connected on the exhaust pipe 11, a spring 13 is sleeved outside the sleeve 10, and both ends of the spring 13 are respectively fixedly connected to the annular piece 12 and the combustion chamber 4. The lower end of the exhaust pipe 11 is connected to an external suction pump, and the external suction pump extracts the flue gas in the combustion chamber 4 through the exhaust pipe 11.

[0027] During the sintering process, the external air pump pumps air into the combustion chamber 4 through the intake pipe 9, which can provide sufficient oxygen for the fuel in the combustion chamber 4. At the same time, due to the suction of the external suction pump, the flue gas in the combustion chamber 4 can be extracted through the exhaust pipe 11, thereby discharging the high-temperature flue gas generated during the combustion process. Both the intake pipe 9 and the exhaust pipe 11 are made of heat-conductive metal with good heat conductivity. When the high-temperature flue gas passes through the water tank 6, the heat in the flue gas is conducted to the water in the water tank 6 through the exhaust pipe 11, the water is heated and the temperature rises, and the heat in the water is then conducted to the intake pipe 9, thereby preheating the air passing through the intake pipe 9.

[0028] When the high-temperature flue gas passes through the water tank 6, the process of its heat being conducted to the water realizes the waste heat utilization of the flue gas and reduces the waste of energy. The preheated air enters the combustion chamber 4, reducing the additional heat required during the combustion process, thereby reducing energy consumption.

[0029] Embodiment 2 proposed based on Embodiment 1: Since it is considered that as the working time of the exhaust pipe 11 increases, part of the soot flowing in the exhaust pipe 11 will be adsorbed on the inner wall of the exhaust pipe 11, resulting in the formation of an adhesion layer on the inner wall of the exhaust pipe 11. The adhesion layer will reduce the heat transfer efficiency of the exhaust pipe 11, and further cause the heat in the flue gas to not be efficiently conducted to the water in the water tank 6.

[0030] Refer to Figures 2-7The smoke exhaust mechanism also includes a vibration component, which is installed in the water tank 6 and connected to the output shaft on the other side of the dual-axis motor 7. The vibration component is used to drive the exhaust pipe 11 to vibrate. The vibration component includes an incomplete gear 22 located in the water tank 6. The output shaft on the other side of the dual-axis motor 7 extends into the water tank 6 and is rotatably installed on the water tank 6. The incomplete gear 22 is fixedly connected to the output shaft end on the other side of the dual-axis motor 7. A heat conducting part 23 is provided in the water tank 6. The heat conducting part 23 is made of a metal material with good thermal conductivity. The heat conducting part 23 is fixedly connected to the exhaust pipe 11. A tooth row part 14 is provided on the heat conducting part 23. The tooth row part 14 meshes with the incomplete gear 22. A wear-resistant block 15 is fixedly installed on the inner wall of the water tank 6. One end of the heat conducting part 23 is attached to the wear-resistant block 15. The contact surface between the exhaust pipe 11 and the water is increased by providing the heat conducting part 23, thereby improving the heat transfer efficiency between the high-temperature smoke and water in the exhaust pipe 11.

[0031] During operation, the dual-axis motor 7 can synchronously drive the incomplete gear 22 to rotate, and the incomplete gear 22 intermittently drives the tooth row portion 14 to move, and the tooth row portion 14, the heat conducting portion 23, and the exhaust pipe 11 move synchronously. The exhaust pipe 11 first moves horizontally in the direction away from the sleeve 10, and the spring 13 is stretched. When the incomplete gear 22 is separated from the tooth row portion 14, the elastic force of the spring 13 resets and drives the exhaust pipe 11 to move in the opposite direction, and one end of the heat conducting portion 23 hits the wear-resistant block 15, which can make the heat conducting portion 23 vibrate, and the exhaust pipe 11 also vibrates synchronously. As the dual-axis motor 7 continues to rotate, the exhaust pipe 11 continues to vibrate, which can assist in separating the smoke and dust attachments on the inner wall of the exhaust pipe 11 from the exhaust pipe 11, thereby making it difficult for smoke and dust attachments to be generated inside the exhaust pipe 11, so that the exhaust pipe 11 can still maintain good thermal conductivity under long-term operation.

[0032] Among them, a soundproof cover 16 is fixedly installed in the water tank 6, the wear-resistant block 15 is located in the soundproof cover 16, and one end of the heat conduction part 23 penetrates into the soundproof cover 16 and is slidably installed on the soundproof cover 16. The soundproof cover 16 isolates the sound generated by the collision between the heat conduction part 23 and the wear-resistant block 15, thereby reducing the noise generated during the operation of the device.

[0033] Among them, friction parts 17 are provided on both side walls of the other end of the heat conducting part 23, and two vertical shafts 18 arranged on both sides of the exhaust pipe 11 are rotatably installed in the water tank 6. A plurality of blades 19 are fixedly connected to the vertical shafts 18, and friction wheels 20 are fixedly installed on the upper ends of the vertical shafts 18. The friction wheels 20 located on the same side are tightly fitted with the friction part 17 and the transmission is transmitted through friction between the two.

[0034] During the reciprocating movement of the heat conducting part 23, the friction part 17 thereon synchronously drives the friction wheel 20 to rotate. The friction wheel 20, the vertical shaft 18 and multiple blades 19 rotate. During the rotation of the blades 19, the water in the water tank 6 can be agitated, making the water temperature distribution in the water tank 6 more uniform, thus avoiding the problem of uneven temperature on both sides of the water tank 6, enabling the air in the exhaust duct 11 to absorb more heat and improving the preheating efficiency of the device for the air.

[0035] Among them, a water filling port 21 for adding water is provided at the top of the water tank 6. A liquid level scale line is provided on one side of the water tank 6. A temperature detector 23 is installed on the water tank 6 to detect the water temperature in the water tank 6. Slots 24 are provided on both side walls at the open end of the combustion chamber 4. A sealing plate 25 is provided at the open end of the combustion chamber 4. The sealing plate 25 is used to seal the open end of the combustion chamber 4. Sliders 26 are fixedly connected to both sides of the sealing plate 25. The sliders 26 can be inserted into the slots 24 and slide up and down. After the fuel is added to the combustion chamber 4, the open end of the combustion chamber 4 is sealed by the sealing plate 25 and the sliders 26 are inserted into the slots 24, so that the heat generated by the combustion of the fuel will not be dissipated from the open end of the combustion chamber 4.

[0036] Working principle: Place the raw material ceramsite at one end of the barrel 2. Rotate the barrel 2 to drive the spiral part 3 therein to rotate. The rotation of the spiral part 3 can convey the raw material ceramsite to the other end of the barrel 2. The double-shaft motor 7 works and drives the barrel 2 to rotate through the synchronous belt mechanism 8. Rotate the barrel 2 to drive the spiral part 3 therein to rotate. The rotation of the spiral part 3 can convey the raw material ceramsite to the other end of the barrel 2. Add fuel into the combustion chamber 4 from its open end, and ignite the fuel in the combustion chamber 4 through the igniter 5. The upper end of the combustion chamber 4 is in contact with the bottom of the barrel 2, and the contact surfaces of both are polished. The contact positions of both are made of heat-conducting metals with good heat conductivity. The heat generated by the combustion of the combustion chamber 4 is efficiently conducted to the barrel 2. Sinter the raw material ceramsite in the barrel 2 through the combustion chamber 4.

[0037] During the sintering process, air is pumped into the combustion chamber 4 from the intake duct 9 by an external air pump, which can provide sufficient oxygen for the fuel in the combustion chamber 4. At the same time, through the suction action of an external suction pump, the flue gas in the combustion chamber 4 can be drawn out through the exhaust duct 11, thus discharging the high-temperature flue gas generated during the combustion process. Both the intake duct 9 and the exhaust duct 11 are made of heat-conducting metals with good heat conductivity. When the high-temperature flue gas passes through the water tank 6, the heat in the flue gas is conducted to the water in the water tank 6 through the exhaust duct 11, the water is heated and raised in temperature, and the heat in the water is then conducted to the intake duct 9, thereby preheating the air passing through the intake duct 9.

[0038] During operation, the dual-axis motor 7 can synchronously drive the incomplete gear 22 to rotate, and the incomplete gear 22 intermittently drives the tooth row part 14 to move, and the tooth row part 14, the heat conducting part 23, and the exhaust pipe 11 move synchronously. The exhaust pipe 11 first moves horizontally in the direction away from the sleeve 10, and the spring 13 is stretched. When the incomplete gear 22 separates from the tooth row part 14, the elastic force of the spring 13 resets and drives the exhaust pipe 11 to move in the opposite direction, and one end of the heat conducting part 23 hits the wear-resistant block 15, which can cause the heat conducting part 23 to vibrate, and the exhaust pipe 11 also vibrates synchronously. As the dual-axis motor 7 continues to rotate, the exhaust pipe 11 continues to vibrate, which can assist in separating the smoke and dust attachments on the inner wall of the exhaust pipe 11 from the exhaust pipe 11. During the reciprocating movement of the heat conducting part 23, the friction part 17 thereon synchronously drives the friction wheel 20 to rotate, and the friction wheel 20, the vertical shaft 18 and the plurality of blades 19 rotate. During the rotation of the blades 19, the water in the water tank 6 can be stirred to make the water temperature distribution in the water tank 6 more uniform.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waste heat recovery device for preparing ceramsite from industrial sludge, comprising a machine base (1), characterized in that, A barrel (2) is arranged on the machine base (1). Both ends of the barrel (2) penetrate through the machine base (1) and are rotatably installed on the machine base (1). A spiral part (3) is arranged on the inner wall of the barrel (2). Both ends of the barrel (2) are open. A combustion chamber (4) is fixedly installed on the machine base (1). The combustion chamber (4) is located at the lower end of the barrel (2) and is used for storing fuel. One end of the combustion chamber (4) is open. An igniter (5) is fixedly installed on the combustion chamber (4). The ignition end of the igniter (5) is located inside the combustion chamber (4). A water tank (6) is fixedly installed on the machine base (1). The water tank (6) is located at the lower end of the combustion chamber (4) and is filled with water inside. A gas supply mechanism passing through the water tank (6) is connected and installed on one side of the combustion chamber (4). The gas supply mechanism is connected to an external air pump and is used for introducing air into the combustion chamber (4). A flue gas exhaust mechanism passing through the water tank (6) is connected and installed on the other side of the combustion chamber (4). The flue gas exhaust mechanism is connected to an external suction pump and is used for discharging the flue gas in the combustion chamber (4).

2. The waste heat recovery device for preparing ceramsite from industrial sludge according to claim 1, wherein, A driving mechanism is arranged on the machine base (1). The driving mechanism is connected to the barrel (2) and is used for driving the barrel (2) to rotate.

3. The waste heat recovery device for preparing ceramsite from industrial sludge according to claim 2, characterized in that, The driving mechanism includes a double-shaft motor (7). The double-shaft motor (7) is fixedly installed on the machine base (1). A synchronous belt mechanism (8) is installed at the output shaft end on one side of the double-shaft motor (7). The upper end of the synchronous belt mechanism (8) is installed on the barrel (2). The double-shaft motor (7) drives the barrel (2) to rotate through the synchronous belt mechanism (8).

4. The waste heat recovery device for preparing ceramsite from industrial sludge according to claim 1, wherein, The gas supply mechanism includes an intake pipe (9). The upper end of the intake pipe (9) is communicated and fixedly connected to the combustion chamber (4). There are multiple communication ports between the intake pipe (9) and the combustion chamber (4). The lower end of the intake pipe (9) passes through the water tank (6). The lower port of the intake pipe (9) is communicated with an external air pump. The external air pump pumps air into the combustion chamber (4) through the intake pipe (9).

5. The waste heat recovery device for preparing ceramsite from industrial sludge according to claim 1, wherein, The flue gas exhaust mechanism includes a plurality of sleeves (10) communicated with the combustion chamber (4). The sleeves (10) are fixedly installed on the combustion chamber (4). It also includes an exhaust pipe (11). The upper end of the exhaust pipe (11) is provided with multiple ports. The upper ends of the exhaust pipe (11) are respectively inserted into the sleeves (10) and remain in a communicated state. The lower end of the exhaust pipe (11) extends into the water tank (6). The exhaust pipe (11) can slide horizontally. An annular plate (12) is sleeved and fixedly connected on the exhaust pipe (11). A spring (13) is sleeved outside the sleeve (10). Both ends of the spring (13) are respectively fixedly connected to the annular plate (12) and the combustion chamber (4). The lower end of the exhaust pipe (11) is communicated with an external suction pump. The external suction pump extracts the flue gas in the combustion chamber (4) through the exhaust pipe (11).

6. The waste heat recovery device for preparing ceramsite from industrial sludge according to claim 5, characterized in that The flue gas exhaust mechanism further includes a vibration component. The vibration component is installed in the water tank (6) and is connected to the output shaft on the other side of the double-shaft motor (7). The vibration component is used for driving the exhaust pipe (11) to vibrate.

7. The waste heat recovery device for preparing ceramsite from industrial sludge according to claim 6, wherein, The vibration assembly includes an incomplete gear (22) located inside the water tank (6). The output shaft on the other side of the double-shaft motor (7) extends into the water tank (6) and is rotatably installed on the water tank (6). The incomplete gear (22) is fixedly connected to the end of the output shaft on the other side of the double-shaft motor (7). A heat conduction part (23) is provided inside the water tank (6). The heat conduction part (23) is fixedly connected to the exhaust pipe (11). A tooth row part (14) is provided on the heat conduction part (23). The tooth row part (14) meshes with the incomplete gear (22). A wear-resistant block (15) is fixedly installed on the inner side wall of the water tank (6). One end of the heat conduction part (23) is attached to the wear-resistant block (15).

8. The waste heat recovery device for preparing ceramsite from industrial sludge according to claim 7, characterized in that, A sound insulation cover (16) is fixedly installed inside the water tank (6). The wear-resistant block (15) is located inside the sound insulation cover (16). One end of the heat conduction part (23) penetrates into the sound insulation cover (16) and is slidably installed on the sound insulation cover (16).

9. The waste heat recovery device for preparing ceramsite from industrial sludge according to claim 7, characterized in that, Friction parts (17) are provided on both side walls at the other end of the heat conduction part (23). Two vertical shafts (18) are rotatably installed inside the water tank (6) and are respectively arranged on both sides of the exhaust pipe (11). A plurality of blades (19) are fixedly connected to the vertical shafts (18). Friction wheels (20) are fixedly installed at the upper ends of the vertical shafts (18). The friction wheels (20) on the same side are in close contact with the friction parts (17) and are driven by friction between them.

10. The waste heat recovery device for preparing ceramsite from industrial sludge according to claim 1, wherein, A water filling port (21) for adding water is opened at the top of the water tank (6). A liquid level scale line is provided on one side of the water tank (6). A temperature detector (23) is installed on the water tank (6). Slots (24) are opened on both side walls at the open end of the combustion chamber (4). A sealing plate (25) is provided at the open end of the combustion chamber (4). The sealing plate (25) is used to seal the open end of the combustion chamber (4). Sliders (26) are fixedly connected to both sides of the sealing plate (25). The sliders (26) can be inserted into the slots (24) and can slide up and down.

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