Kiln heat energy recovery mechanism

Abstract

The invention relates to the technical field of industrial kiln energy conservation, in particular to a kiln heat energy recovery mechanism which comprises an energy conversion mechanism and a heat conduction mechanism which are arranged on the outer side of a kiln body, the energy conversion mechanism comprises a shell, transmission shafts are rotationally installed on the two sides in the shell, rotor impellers are arranged on the transmission shafts in a sleeving mode, and a stator impeller is fixedly connected to the middle in the shell; the stator impeller is located between the two rotor impellers, a power generator is arranged below the shell, a first belt assembly is arranged between a main shaft on the power generator and a transmission shaft, a flow guide pipe is installed between the kiln body and the shell in a communicated mode, and an air outlet of the flow guide pipe faces the rotor impeller on the inclined upper portion. Heat energy is converted into electric energy, first-time energy recovery is achieved, waste caused by direct discharge of kiln heat energy is reduced, hot air after driving the rotor impeller continues to enter the spiral pipe through the connecting pipe, heat is transferred to water in the water storage tank, second-time heat energy recovery is achieved, the heat energy is used for heat storage or heat supply, and the comprehensive utilization rate of energy is remarkably increased.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial kiln energy conservation, in particular to a kiln heat energy recovery mechanism. Background Art

[0002] In industrial production, kilns are widely used as core thermal equipment in processes such as material calcination, melting, and sintering. A large amount of high-temperature exhaust gas will be generated during its operation. If this part of the heat energy is directly discharged, it will not only cause energy waste, but also lead to thermal pollution and increased greenhouse gas emissions. Therefore, efficient recovery of heat energy in kiln exhaust gas is crucial to reducing production costs. Existing recovery devices use a dual method of power generation and heat conduction recovery. However, when the exhaust gas temperature is low, forcibly driving the turbine or impeller to generate electricity will cause a sharp drop in mechanical efficiency due to insufficient driving force, and the idling of the impeller will cause additional mechanical losses. If only heat conduction recovery is performed in high-temperature scenarios, the high-grade energy in the exhaust gas that can be used for power generation is wasted, and the graded utilization of heat energy is failed to be achieved. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a kiln heat energy recovery mechanism, which has the advantage of adjusting the energy recovery method and solves the problem of failing to achieve graded utilization of heat energy.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: The kiln heat energy recovery mechanism includes an energy conversion mechanism and a heat conduction mechanism arranged on the outside of the kiln body. The energy conversion mechanism includes a shell, and transmission shafts are rotatably installed on both sides of the shell. The transmission shafts are equipped with rotor impellers. A stator impeller is fixedly connected to the middle part of the shell, and the stator impeller is located between the two rotor impellers. A generator is provided below the shell, and a belt assembly is provided between the main shaft and the transmission shaft on the generator. A guide pipe is installed between the kiln body and the shell, and the air outlet of the guide pipe is facing the rotor impeller obliquely above. The heat conduction mechanism includes a water storage tank, and a spiral tube is provided on the outside of the water storage tank. A connecting pipe is connected between the spiral tube and the shell, and the air outlet of the spiral tube is connected to the exhaust pipe. The air inlet of the connecting pipe also faces the rotor impeller obliquely above.

[0005] Preferably, a flow guide assembly is provided on the shell, and is used for the flow guide pipe to directly transport the hot air into the connecting pipe.

[0006] Preferably, the flow guide assembly includes a delivery pipe fixedly connected to the shell, and the shell is further provided with a transmission member for connecting the delivery pipe with the flow guide pipe and the connecting pipe.

[0007] Preferably, the transmission member includes a transmission ring sleeved on the guide pipe and the connecting pipe, the transmission ring is connected to a rotating shaft, the rotating shaft is rotatably mounted on the shell, the end of the rotating shaft is fixedly connected to a spur gear, the bottom of the shell is fixedly connected to a base, a motor is fixedly mounted on the base, the output end of the motor is fixedly connected to a connecting shaft, screws are sleeved on both sides of the connecting shaft, the threads on the screws on both sides are reverse threads, the screws are threadedly connected to a limit block, the limit block is slidably connected to the base through a slide groove, a rack is fixedly connected to the limit block, and the rack is meshed with the spur gear for transmission.

[0008] Preferably, a stirring shaft is rotatably mounted on the water tank, a plurality of transmission blades are fixedly connected to the stirring shaft, a load-bearing shaft is rotatably mounted on the exhaust pipe, a fan blade group is mounted on the load-bearing shaft, the fan blade group is located inside the exhaust pipe, and a belt assembly 2 is provided between the load-bearing shaft and the stirring shaft.

[0009] Preferably, the outer side of the water storage tank is provided with a heat-insulating cover, which is composed of an inner layer of aluminum silicate fiber felt and an outer layer of stainless steel plate, with a vacuum insulation layer provided between the two layers.

[0010] Preferably, the belt assembly 1 includes pulleys mounted on the transmission shaft and the main shaft, and the pulleys are connected via a belt transmission.

[0011] Preferably, the belt assembly 2 and the belt assembly 1 have the same structure, and pulleys are provided on the load-bearing shaft and the stirring shaft.

[0012] Preferably, a temperature detector is provided on the guide tube, and a single chip microcomputer is also installed on the base.

[0013] By means of the above technical solution, the present invention provides a kiln heat energy recovery mechanism, which has at least the following beneficial effects: 1. The kiln heat energy recovery mechanism uses hot gas to impact the rotor impeller through the guide pipe to rotate, and then drives the generator main shaft through the drive shaft and belt assembly to convert the heat energy into electrical energy, realizing the first energy recovery and reducing the waste caused by direct heat energy discharge from the kiln. The hot gas after driving the rotor impeller continues to enter the spiral tube through the connecting pipe and transfers the heat to the water in the water storage tank, realizing the second heat energy recovery, which is used for heat storage or heating, and significantly improving the comprehensive energy utilization rate.

[0014] 2. The kiln's heat energy recovery mechanism: when the gas temperature in the draft tube is high, the draft tube and the connecting tube remain in their initial positions. The gas first drives the rotor impeller to generate electricity, and then enters the spiral tube for heat conduction, completing double energy recovery. When the gas temperature is insufficient, the draft tube and the connecting tube are driven by the transmission parts to deflect and directly connect to the delivery pipe, skipping the power generation link. This avoids the waste of heat caused by the low-temperature gas driving the impeller to run idle, ensuring that the heat energy is used for heat conduction first, thereby improving the overall energy utilization rate.

[0015] 3. The kiln's heat energy recovery mechanism has a stator impeller fixed in the middle of the shell and located between the two rotor impellers. It can guide and rectify the airflow, optimize the force direction of the rotor impellers, improve the rotation efficiency, and thus improve the energy conversion efficiency of the generator.

[0016] 4. The kiln's heat energy recovery mechanism gives priority to dual recovery of power generation and heat conduction when the hot gas temperature is high. When the temperature is insufficient, the guide pipe is directly connected to the connecting pipe through the transmission part, skipping the rotor impeller drive link, reducing the energy loss of low-calorie gas in the shell, ensuring that the heat energy is directly used to heat the water storage tank, and avoiding ineffective work.

[0017] 5. The kiln has a heat recovery mechanism. After the hot air dissipates heat through the spiral tube, it drives the internal fan blade group to rotate when passing through the exhaust pipe. The second belt assembly drives the stirring shaft and transmission blades in the water storage tank to rotate, stirring the water, accelerating the uniform distribution of heat, and improving the heating stability of the water storage tank. At the same time, it utilizes the residual energy of the exhaust gas to further reduce additional energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 Schematic diagram of the structure of the energy conversion mechanism of the present invention; Figure 3 Schematic diagram of the structure of the flow guide assembly of the present invention; Figure 4 Schematic diagram of the external connection structure of the transmission cover of the present invention; Figure 5 Schematic diagram of the structure of the heat conduction mechanism of the present invention.

[0019] Reference numerals: 100. Kiln body; 200, energy conversion mechanism; 201, base; 202, housing; 203, flow guide tube; 204, temperature detector; 205, transmission shaft; 206, rotor impeller; 207, connecting pipe; 208, flow guide assembly; 2081, motor; 2082, connecting shaft; 2083, rack; 2084, screw; 2085, stopper; 2086, rotating shaft; 2087, spur gear; 2088, transmission ring; 2089, delivery pipe; 209, generator; 210, main shaft; 211, belt assembly 1; 212, stator impeller; 300. Heat conduction mechanism; 301. Insulation cover; 302. Water storage tank; 303. Spiral tube; 304. Exhaust pipe; 305. Load-bearing shaft; 306. Fan blade assembly; 307. Agitator shaft; 308. Transmission blade; 309. Belt assembly 2. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The following describes the kiln heat recovery mechanism provided by some embodiments of the present invention with reference to the accompanying drawings.

[0022] Example 1: The traditional solution may only generate electricity by driving the impeller with hot gas, but the waste heat of the high temperature gas after power generation is not recovered and is directly discharged, resulting in heat waste. In order to solve the above problem, combined with Figure 1 、 Figure 2 and Figure 5 As shown, the kiln heat energy recovery mechanism provided by the present invention includes an energy conversion mechanism 200 and a heat conduction mechanism 300 arranged on the outside of the kiln body 100, the energy conversion mechanism 200 includes a shell 202, and transmission shafts 205 are rotatably installed on both sides of the shell 202. The transmission shaft 205 is equipped with a rotor impeller 206, and a stator impeller 212 is fixedly connected to the middle part of the shell 202. The stator impeller 212 is located between the two rotor impellers 206. A generator 209 is provided below the shell 202, and a belt assembly 211 is provided between the main shaft 210 on the generator 209 and the transmission shaft 205. A guide pipe 203 is installed between the kiln body 100 and the shell 202, and the air outlet of the guide pipe 203 is directed to the rotor impeller 206 obliquely upward. During operation, the kiln body 100 generates a large amount of hot gas. The gas enters the shell 202 through the guide pipe 203. Since the gas outlet of the guide pipe 203 faces the rotor impeller 206, it drives the rotor impeller 206 to rotate. Then, the rotor impeller 206 drives the transmission shaft 205. The transmission shaft 205 drives the main shaft 210 of the generator 209 below to rotate through the belt assembly 1 211, thereby collecting the heat energy carried by the gas. The stator impeller 212 fixed in the middle of the shell 202 is located between the two rotor impellers 206, which can guide and rectify the airflow, optimize the force direction of the rotor impeller 206, improve the rotation efficiency, and thus improve the energy conversion efficiency of the generator 209. A single recovery mechanism can only provide a single form of energy (electricity or heat), and cannot simultaneously meet the combined needs of electricity and heat in industrial production. In order to solve the above problem, the heat conduction mechanism 300 includes a water storage tank 302, and a spiral tube 303 is provided on the outside of the water storage tank 302. A connecting pipe 207 is connected between the spiral tube 303 and the shell 202. The air outlet of the spiral tube 303 is connected to the exhaust pipe 304, and the air inlet of the connecting pipe 207 is also facing the rotor impeller 206 obliquely upward. After the gas drives the rotor impeller 206 to rotate, it is transported to the spiral tube 303 through the connecting pipe 207. The spiral tube 303 contacts the water storage tank 302, and the heat in the gas is transferred to the water in the water storage tank 302, further recovering the heat energy for heat storage or heat supply, thereby significantly improving the comprehensive energy utilization rate.

[0023] Power generation function: Hot gas impacts the rotor impeller 206 through the guide tube 203 to rotate, and drives the generator 209 main shaft 210 through the transmission shaft 205 and the belt assembly 211, converting thermal energy into electrical energy, realizing the first energy recovery and reducing the waste caused by direct discharge of kiln heat energy.

[0024] Heat conduction function: The hot gas after driving the rotor impeller 206 continues to enter the spiral tube 303 through the connecting pipe 207, transferring heat to the water in the water storage tank 302, realizing the second heat energy recovery for heat storage or heating, and significantly improving the comprehensive energy utilization rate.

[0025] Specifically, the belt assembly 211 includes a pulley mounted on the transmission shaft 205 and the main shaft 210. The pulleys are connected by belt transmission. The transmission shaft 205 drives the pulley to rotate, and the pulley drives another pulley to rotate through the belt. The pulley drives the main shaft 210 to rotate, thereby transmitting mechanical energy.

[0026] Furthermore, a temperature detector 204 is provided on the guide tube 203, and a single-chip microcomputer is also installed on the base 201. The temperature detector 204 can monitor the heat of the transported gas. When the heat is high, heat energy can be recovered twice. When the heat is insufficient, only the heat in the gas is transported to the water for storage.

[0027] According to the embodiment, when the hot gas temperature is high, priority is given to completing the dual recovery of power generation and heat conduction. When the temperature is insufficient, the guide pipe 203 is directly connected to the connecting pipe 207 through the transmission component, skipping the rotor impeller 206 drive link, reducing the energy loss of the low-calorie gas in the shell 202, ensuring that the heat energy is directly used to heat the water storage tank 302, and avoiding ineffective work.

[0028] Example 2: The low-temperature gas itself carries a limited amount of heat energy. If the rotor impeller 206 is forced to rotate, the kinetic energy of the gas will be consumed by the impeller's rotation (such as mechanical friction of the impeller, heat dissipation caused by airflow disturbances, etc.), resulting in a decrease in the amount of heat ultimately transferred to the spiral tube 303. In this case, the path that could originally directly and efficiently transfer the heat of the low-temperature gas to the water storage tank 302 through the connecting pipe 207 is blocked, resulting in a double efficiency loss of ineffective power generation loss and waste heat waste. In order to solve the above problem, combined with Figure 3 and Figure 4 As shown, based on the first embodiment, the housing 202 is provided with a guide assembly 208 for the guide pipe 203 to directly transport the hot gas to the connecting pipe 207. When the gas temperature does not meet the standard, it will not contact the rotor impeller 206, thereby reducing heat loss.

[0029] Specifically, the guide assembly 208 includes a delivery pipe 2089 fixedly connected to the shell 202. The shell 202 is also provided with a transmission part for connecting the delivery pipe 2089 with the guide pipe 203 and the connecting pipe 207. The guide pipe 203 delivers the gas to the delivery pipe 2089, and then the delivery pipe 2089 directly delivers the gas to the connecting pipe 207, thereby reducing the loss of intermediate gas delivery.

[0030] Furthermore, the transmission member includes a transmission ring 2088 sleeved on the guide tube 203 and the connecting tube 207, the transmission ring 2088 is connected to a rotating shaft 2086, the rotating shaft 2086 is rotatably mounted on the housing 202, the end of the rotating shaft 2086 is fixedly connected to a spur gear 2087, the bottom of the housing 202 is fixedly connected to a base 201, the base 201 is fixedly mounted with a motor 2081, the output end of the motor 2081 is fixedly connected to a connecting shaft 2082, screws 2084 are sleeved on both sides of the connecting shaft 2082, the threads on the screws 2084 on both sides are reverse threads, the screws 2084 are threadedly connected to a limit block 2085, the limit block 2085 is slidably connected to the base 201 through a slide groove, the limit block 2085 is fixedly connected to a rack 2083, the rack 2083 is meshed with the spur gear 2087 for transmission, and the motor 2081 starts The connecting shaft 2082 is driven to rotate, and the two screws 2084 rotate with the connecting shaft 2082, driving the limit block 2085 to move outward, and the rack 2083 moves with the limit block 2085. The rack 2083 drives the rotating shaft 2086 to rotate through the spur gear 2087. The two rotating shafts 2086 respectively drive the guide tube 203 and the connecting tube 207 to deflect toward the delivery tube 2089, so that the guide tube 203 and the connecting tube 207 are aligned with the delivery tube 2089, which can directly deliver the gas to the connecting tube 207. The motor 2081 drives the connecting shaft 2082 to reverse, which can reset the guide tube 203 and the connecting tube 207. The direct diversion path shortens the gas transmission distance, avoids redundant flow and heat dissipation loss of gas in the shell 202, and can quickly switch to the high-efficiency heat conduction mode especially in low temperature scenarios.

[0031] According to the embodiment, the temperature of the hot gas is monitored by the temperature detector 204 on the guide tube 203, and the guide assembly 208 is controlled by the single chip microcomputer to achieve intelligent distribution of heat.

[0032] Example 3: The traditional heat conduction mechanism 300 only conducts heat through the pipe wall. The water in the water storage tank 302 mainly relies on natural convection to achieve heat exchange. However, the natural convection speed is slow, which easily leads to stratification phenomenon with high water temperature in the upper layer and low water temperature in the lower layer. Especially when the hot gas flow fluctuates or stops input, the temperature uniformity in the water storage tank 302 is poor, affecting the stability of heating. In order to solve the above problems, combined with Figure 5 As shown, on the basis of Example 1, a stirring shaft 307 is rotatably installed on the water tank 302, and a plurality of transmission blades 308 are fixed to the stirring shaft 307. A load-bearing shaft 305 is rotatably installed on the exhaust pipe 304, and a fan blade group 306 is mounted on the load-bearing shaft 305. The fan blade group 306 is located inside the exhaust pipe 304, and a belt assembly 2 309 is provided between the load-bearing shaft 305 and the stirring shaft 307. After passing through the spiral tube 303, the gas enters the exhaust pipe 304, and then the gas contacts the fan blade group 306 to drive it to rotate. The load-bearing shaft 305 rotates with the fan blade group 306, and the load-bearing shaft 305 drives the stirring shaft 307 to rotate through the belt assembly 2 309. The stirring shaft 307 drives the transmission blades 308 to rotate, which can stir the water, accelerate the uniform distribution of heat, and improve the heating stability of the water tank 302. At the same time, the waste energy of the exhaust gas is utilized to further reduce the additional energy consumption.

[0033] The structure of the belt assembly 2 309 is the same as that of the belt assembly 1 211. Pulleys are provided on the load-bearing shaft 305 and the stirring shaft 307. No extra electric energy is required. The energy of gas exhaust is utilized to further reduce energy consumption.

[0034] Specifically, the water storage tank 302 is provided with an insulation cover 301 on the outside. The insulation cover 301 is composed of an inner layer of aluminum silicate fiber felt and an outer layer of stainless steel plate. A vacuum insulation layer is provided between the two layers, which can reduce the radiation loss of heat to the external environment, improve the heat storage efficiency, and ensure the effective storage and utilization of thermal energy.

[0035] As can be seen from the above embodiment, during operation of the kiln body 100, a large amount of heat-carrying gas is generated. This gas enters the shell 202 through the draft tube 203. Because the outlet of the draft tube 203 faces the rotor impeller 206 obliquely upward, it drives the rotor impeller 206 to rotate. The rotor impeller 206, via the drive shaft 205 and belt assembly 1 211, drives the main shaft 210 of the generator 209, thereby converting heat energy into electrical energy. After the gas drives the rotor impeller 206, it enters the spiral tube 303 through the connecting tube 207. The spiral tube 303 is placed outside the water tank 302, transferring heat to the water in the water tank 302, completing heat recovery. The gas is then discharged through the exhaust pipe 304. The temperature detector 204 on the guide pipe 203 monitors the heat of the gas, and the single-chip microcomputer on the base 201 controls according to the monitoring results: when the heat is high, the gas first drives the rotor impeller 206 to generate electricity for primary heat recovery, and then passes through the connecting pipe 207 to the spiral tube 303 to heat water for secondary recovery; when the heat is insufficient, the guide component 208 on the shell 202 works, the motor 2081 drives the connecting shaft 2082 to rotate, the screws 2084 on both sides drive the limit block 2085 to move, the rack 2083 engages with the spur gear 2087 to rotate the rotating shaft 2086, so that the guide pipe 203 and the connecting pipe 207 are aligned with the delivery pipe 2089 in the shell 202, and the hot gas is directly transported from the guide pipe 203 to the connecting pipe 207 through the delivery pipe 2089, reducing heat loss.

[0036] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. The kiln heat recovery mechanism is characterized by: It comprises an energy conversion mechanism (200) and a heat conduction mechanism (300) arranged outside the kiln body (100); The energy conversion mechanism (200) includes a housing (202), a transmission shaft (205) is rotatably mounted on both sides of the housing (202), a rotor impeller (206) is mounted on the transmission shaft (205), a stator impeller (212) is fixedly connected to the middle of the housing (202), and the stator impeller (212) is located between the two rotor impellers (206), a generator (209) is provided below the housing (202), a belt assembly (211) is provided between the main shaft (210) on the generator (209) and the transmission shaft (205), and a guide pipe (203) is installed between the kiln body (100) and the housing (202), and an air outlet of the guide pipe (203) faces the rotor impeller (206) obliquely upward; The heat conduction mechanism (300) comprises a water storage tank (302), a spiral tube (303) is sleeved on the outside of the water storage tank (302), a connecting tube (207) is connected between the spiral tube (303) and the housing (202), an air outlet of the spiral tube (303) is connected to an exhaust pipe (304), and an air inlet of the connecting tube (207) is also directed towards the rotor impeller (206) obliquely upward.

2. The kiln heat recovery mechanism according to claim 1, characterized in that: The shell (202) is provided with a flow guide assembly (208) for the flow guide pipe (203) to directly transport the hot gas into the connecting pipe (207).

3. The kiln heat recovery mechanism according to claim 2, characterized in that: The flow guide assembly (208) includes a delivery pipe (2089) fixedly connected to the housing (202). The housing (202) is also provided with a transmission member for connecting the delivery pipe (2089) with the flow guide pipe (203) and the connecting pipe (207).

4. The kiln heat recovery mechanism according to claim 3, characterized in that: The transmission member comprises a transmission ring (2088) sleeved on the guide tube (203) and the connecting tube (207); a rotating shaft (2086) is connected to the transmission ring (2088); the rotating shaft (2086) is rotatably mounted on the housing (202); a spur gear (2087) is fixedly connected to the end of the rotating shaft (2086); a base (201) is fixedly connected to the bottom of the housing (202); a motor (2081) is fixedly mounted on the base (201); and the motor (2081) ) is fixedly connected to the output end of the connecting shaft (2082), and screws (2084) are mounted on both sides of the connecting shaft (2082). The threads on the screws (2084) on both sides are reverse threads. The screws (2084) are threadedly connected to a limit block (2085), and the limit block (2085) is slidably connected to the base (201) through a slide groove. A rack (2083) is fixedly connected to the limit block (2085), and the rack (2083) is meshed with a spur gear (2087) for transmission.

5. The kiln heat recovery mechanism according to claim 1, characterized in that: A stirring shaft (307) is rotatably mounted on the water storage tank (302), a plurality of transmission blades (308) are fixedly connected to the stirring shaft (307), a load-bearing shaft (305) is rotatably mounted on the exhaust pipe (304), a fan blade group (306) is sleeved on the load-bearing shaft (305), and the fan blade group (306) is located inside the exhaust pipe (304), and a belt assembly (309) is provided between the load-bearing shaft (305) and the stirring shaft (307).

6. The kiln heat recovery mechanism according to claim 1, characterized in that: The outer side of the water storage tank (302) is provided with a heat-insulating cover (301), which is composed of an inner layer of aluminum silicate fiber felt and an outer layer of stainless steel plate, with a vacuum heat-insulating layer provided between the two layers.

7. The kiln heat recovery mechanism according to claim 1, characterized in that: The belt assembly 1 (211) includes pulleys mounted on the transmission shaft (205) and the main shaft (210), and the pulleys are connected via a belt transmission.

8. The kiln heat recovery mechanism according to claim 5, characterized in that: The belt assembly 2 (309) and the belt assembly 1 (211) have the same structure, and pulleys are provided on the load-bearing shaft (305) and the stirring shaft (307).

9. The kiln heat recovery mechanism according to claim 1, characterized in that: The guide tube (203) is provided with a temperature detector (204), and the base (201) is also provided with a single-chip microcomputer.

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