A tunnel kiln flue gas waste heat continuous utilization system

Abstract

A continuous waste heat utilization system for tunnel kilns, relating to the field of kiln waste heat utilization technology, includes a first exhaust fan, a first blower, a second blower, a kiln body, a heat stabilization box, and two heat storage chambers. The outer walls of the kiln body near the feed end and discharge end are respectively provided with a first vent and a second vent, and the outlet end of the second blower is connected to the second vent. The heat stabilization box is connected to a differential heat inlet pipe and a heat stabilization outlet pipe. The heat storage chambers are connected to a flue gas inlet pipe, a flue gas outlet pipe, an air inlet pipe, an air outlet pipe, and an exhaust pipe. The inlet end of the first exhaust fan is connected to the first vent of the kiln body, and the outlet end of the first exhaust fan is connected to the two flue gas inlet pipes. The outlet end of the first blower is connected to the two air inlet pipes, and the two air outlet pipes are connected to the differential heat inlet pipe. The heat stabilization outlet pipe is connected to a gas heating device. This continuous waste heat utilization system can directly and continuously utilize the waste heat from the flue gas in the tunnel kiln, improving waste heat utilization efficiency.

Description

Technical Field

[0001] This invention relates to the field of waste heat utilization technology in kilns, and in particular to a continuous waste heat utilization system for tunnel kiln flue gas. Background Technology

[0002] A tunnel kiln generally includes a kiln body, a fuel combustion system, ventilation equipment, and in-kiln conveying equipment for transporting roasted materials. The kiln body is divided into a preheating section, a roasting section, and a cooling section along the material conveying direction. An air inlet is set in the cooling section, and a flue gas outlet is set in the preheating section. In this way, cold air enters from the air inlet to cool the roasted materials, and the combustion flue gas exits from the flue gas outlet to preheat the materials that have just entered the kiln. The roasting temperature of current low-temperature tunnel kilns is above 1000 degrees Celsius, so the temperature of the flue gas is still relatively high when it is discharged, making it essential to collect and utilize the waste heat of the flue gas.

[0003] Chinese invention patent CN104880083A discloses a waste heat utilization system for roller kilns. The method of utilizing waste heat from flue gas is to add an induced draft fan in the cooling section to draw away the high-temperature flue gas from the cooling section. Part of the flue gas is returned to the preheating section for material preheating, and the other part is used to exchange heat with cold fluid through a heat exchanger. However, this existing system is not suitable for roasting tunnel kilns that use fuels such as coal gas or natural gas for combustion, because directly returning the high-temperature flue gas to the preheating section is not conducive to fuel combustion, and heat exchange through a heat exchanger cannot be directly and continuously utilized by the tunnel kiln, and the waste heat utilization rate is also low. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention discloses a continuous utilization system for waste heat from flue gas in a tunnel kiln, which can directly and continuously utilize the waste heat from flue gas in the tunnel kiln, thereby improving the efficiency of waste heat utilization.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] A continuous waste heat utilization system for tunnel kiln flue gas includes a first exhaust fan, a first blower, a second blower, a kiln body, a heat stabilization box, and two heat storage chambers. A gas heating device is installed in the middle section of the kiln body. A first vent and a second vent are respectively located on the outer wall of the kiln body near the feed end and discharge end. A temperature measuring device is installed at the first vent. The outlet end of the second blower is connected to the corresponding second vent. A heat storage mesh plate is installed inside the heat stabilization box, which is connected to a differential heat inlet pipe and a heat stabilization outlet pipe. Multiple heat storage elements are installed in the heat storage chambers. The heat storage chamber is connected to a flue gas inlet pipe, a flue gas outlet pipe, an air inlet pipe, an air outlet pipe, and an exhaust pipe, and valves are installed on each of the flue gas inlet pipe, the flue gas outlet pipe, the air inlet pipe, the air outlet pipe, and the exhaust pipe; the air inlet end of the first exhaust fan is connected to the first vent of the kiln body, and the air outlet end of the first exhaust fan is connected to the two flue gas inlet pipes respectively; the air outlet end of the first blower is connected to the two air inlet pipes respectively, the two air outlet pipes are connected to the differential heat inlet pipe respectively, and the heat stabilization outlet pipe is connected to the air supply pipe of the gas heating device.

[0007] Furthermore, the two flue gas inlet pipes, two flue gas outlet pipes, two air inlet pipes, and two air outlet pipes are all opened and closed alternately; and the four valves on the flue gas inlet pipes and air outlet pipes of the two heat storage chambers, as well as the four valves on the flue gas outlet pipes and air inlet pipes, are respectively combined into two two-position six-way valves.

[0008] Furthermore, the two-position six-way valve includes a valve handle, a hexagonal valve body, a cylindrical valve cavity, and a Z-shaped valve core. Each side of the hexagonal valve body is provided with a channel tube connecting to the cylindrical valve cavity. The two sides of the Z-shaped valve core are rotatably sealed to the two end walls of the cylindrical valve cavity. The four corners of the Z-shaped valve core are slidably sealed to the peripheral walls of the cylindrical valve cavity. The two corners of the same end of the Z-shaped valve core can be located on both sides of the same channel tube diameter. One end of the valve handle rotatably seals through the center of the end face of the hexagonal valve body and is fixedly connected to the rotational symmetry center of the side of the Z-shaped valve core.

[0009] Furthermore, the thermal stabilizer box is connected to an air supply pipe with a valve, and the air supply pipe is connected to an air supply fan.

[0010] Furthermore, the heat storage body is configured as a heat storage ball or heat storage rod made of heat-resistant stainless steel.

[0011] Furthermore, the heat storage body includes a hollow heat storage rod, a heat storage sphere, and an inorganic phase change heat storage material; one end of the hollow heat storage rod is open, and its cavity is filled with inorganic phase change heat storage material; the heat storage sphere has a concave cavity that corresponds to and fits the hollow heat storage rod, and one end of the concave cavity is open, with the open end of the hollow heat storage rod located in the concave cavity of the heat storage sphere.

[0012] Furthermore, the waste heat utilization equipment also includes a second exhaust fan, and the outer wall of the kiln body located between the feed inlet and the first vent is provided with a third vent, and the air inlet end of the second exhaust fan is connected to the third vent.

[0013] Furthermore, the flue gas outlet pipe and the vent pipe are connected to a flue gas treatment device.

[0014] Furthermore, the air inlet of the first blower is equipped with an air filter.

[0015] Furthermore, both the thermal stabilization box and the heat storage chamber are equipped with temperature detectors.

[0016] By employing the technical solution described above, the present invention has the following beneficial effects:

[0017] The tunnel kiln flue gas waste heat continuous utilization system disclosed in this invention can adjust the flue gas discharge temperature through a first exhaust fan and a second blower. Combined with the characteristics of small footprint, high-efficiency energy storage and long-term heat release of the heat storage chamber, the system can continuously recover waste heat from the discharged high-temperature flue gas by switching between the two heat storage chambers. After continuously heating the external clean air, it is sent to the gas heating device at the stable temperature of the heat stabilization box for direct heating, combustion assistance and temperature rise of the kiln body. This not only reduces the gas consumption of the gas heating device and saves costs, but also greatly improves the utilization efficiency of flue gas waste heat. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the valve position structure of a two-position six-way valve;

[0020] Figure 3 This is a schematic diagram of the valve position structure of another two-position six-way valve;

[0021] Figure 4 This is a schematic diagram of the implementation structure of the heat storage body;

[0022] Figure 5 yes Figure 4 A cross-sectional structural diagram.

[0023] In the diagram: 1. Kiln body; 2. Gas heating device; 3. First exhaust fan; 4. Heat storage chamber; 5. Heat storage body; 501. Hollow heat storage rod; 502. Heat storage sphere; 503. Inorganic phase change heat storage material; 504. Graphite paper sleeve; 505. Groove; 6. Flue gas inlet pipe; 7. Air outlet pipe; 8. Air inlet pipe; 9. Flue gas outlet pipe; 10. First blower; 11. Air filter device; 12. Second exhaust fan; 13. Second blower; 14. Flue gas treatment device; 15. Exhaust pipe; 16. Differential heat inlet pipe; 17. Heat stabilization outlet pipe; 18. Heat stabilization box; 19. Heat storage mesh plate; 20. Air supply pipe; 21. Air supply fan; 22. Two-position six-way valve; 221. Hexagonal valve body; 222. Cylindrical valve cavity; 223. Z-shaped valve core; 224. Valve handle. Implementation

[0024] The technical solution of the present invention will now be described with reference to the accompanying drawings of the embodiments of the present invention. In the description, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicating directions or positional relationships, are only used to correspond to the accompanying drawings of the present invention for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation. Example 1:

[0025] Combined with appendix Figure 1 The tunnel kiln flue gas waste heat continuous utilization system includes a first exhaust fan 3, a first blower 10, a second blower 13, a kiln body 1, a heat stabilizing box 18, and two heat storage chambers 4. As needed, both the heat stabilizing box 18 and the heat storage chambers 4 are equipped with temperature detectors to detect the internal temperature of the heat stabilizing box 18 and the heat storage chambers 4.

[0026] A gas heating device 2 is installed in the middle section of the kiln body 1. The gas used is coal gas or natural gas, which is mixed with air and ignited for heating and roasting. A first vent and a second vent are respectively located on the outer wall of the kiln body 1 near the feed end and discharge end. The first vent is equipped with a temperature measuring device. The outlet of the second blower 13 is connected to the second vent to regulate the positive pressure at the discharge end of the kiln body 1, ensuring that an appropriate amount of air flows from the discharge end of the kiln body 1 to the first vent, where it is drawn away by the first exhaust fan 3. The temperature measuring device is used to detect the flue gas temperature at the first vent. The flue gas temperature can be measured by the first... The power of the exhaust fan 3 or the second blower 13 is adjusted. If necessary, the waste heat utilization equipment also includes a second exhaust fan 12. The outer wall of the kiln body 1 between the feed inlet and the first vent is provided with a third vent. The air inlet of the second exhaust fan 12 is connected to the third vent to adjust the negative pressure at the feed end of the kiln body 1, so as to prevent too much cold air at the feed end of the kiln body 1 from being absorbed by the first exhaust fan 3, thereby ensuring that when the firing temperature is about 1200 degrees, the temperature of the first vent can reach 500 to 700 degrees. The high temperature is more conducive to the heat storage of the heat storage chamber 4.

[0027] The heat storage mesh plate 19 is provided inside the heat stabilization box 18. The heat storage mesh plate 19 can be made of heat-resistant stainless steel. After being heated and balanced by hot air in the early stage, when the air entering the heat stabilization box 18 experiences a short-term temperature fluctuation, the heat storage capacity of the heat storage mesh plate 19 can be used to stabilize and regulate the air discharged from the heat stabilization box 18 to a certain extent, so that the temperature difference when the air is discharged will not be too large. The heat stabilization box 18 is connected to a differential heat inlet pipe 16 and a heat stabilization outlet pipe 17.

[0028] The heat storage chamber 4 contains multiple heat storage bodies 5. These heat storage bodies 5 are solid and capable of efficiently storing and releasing heat over extended periods. Specifically, they can be heat storage balls or heat storage rods made of heat-resistant stainless steel. The heat storage rods can have fins evenly distributed around their circumference to increase the contact area. The heat storage chamber 4 is connected to a flue gas inlet pipe 6, a flue gas outlet pipe 9, an air inlet pipe 8, an air outlet pipe 7, and an exhaust pipe 15. Valves are installed on all four pipes. The exhaust pipe 15 serves to allow the heat storage chamber to... 4. When switching from flue gas circulation to air circulation, the exhaust pipe 15 can be opened first to release the flue gas in one chamber of the heat storage chamber 4, and then air can be introduced, heated, and sent out to prevent the flue gas from flowing into the gas heating device 2. In addition, the flue gas inlet pipe 6 and flue gas outlet pipe 9, as well as the air inlet pipe 8 and air outlet pipe 7 are diagonally arranged at both ends of the heat storage chamber 4, which allows the fluid entering the heat storage chamber 4 to fully and directly contact the heat storage body 5 for conduction and radiation heat exchange. Compared with the indirect contact conduction heat exchange of traditional heat exchangers, the efficiency is higher.

[0029] The inlet of the first exhaust fan 3 is connected to the first vent of the kiln body 1. The cold air entering from the outlet of the kiln body 1 cools and heats the material, then heats it up in the middle section of the kiln body 1, and finally preheats the material before it is discharged from the first vent. The outlet of the first exhaust fan 3 is connected to two flue gas inlet pipes 6 to send the high-temperature flue gas discharged from the kiln body 1 into the heat storage chamber 4. In addition, the flue gas outlet pipe 9 and the exhaust pipe 15 are connected to a flue gas treatment device 14 to treat the flue gas discharged from the heat storage chamber 4. After treatment, the air is discharged to protect the environment. The air inlet of the first blower 10 is equipped with an air filter device 11 to filter the air entering the heat storage chamber 4. The air outlet of the first blower 10 is connected to two air inlet pipes 9 respectively, and two air outlet pipes 7 are connected to the differential heat inlet pipe 16 respectively. The heat stabilization outlet pipe 17 is connected to the air supply pipe of the gas heating device 2. After the external clean air is heated by the heat storage chamber 4, it is sent to the gas heating device 2 and directly used for the roasting, heating and combustion of the kiln body 1.

[0030] Working principle: First, the gas heating device 2 is started to heat the middle section of the kiln body 1 during roasting. The valves on the flue gas inlet pipe 6 and flue gas outlet pipe 9 of one heat storage chamber 4 are opened to prepare for heat storage. At the same time, the air inlet pipe 8 and air outlet pipe 7 of another heat storage chamber 4 are opened, and the first exhaust fan 3 and the first blower 10 are started. When the kiln body 1 reaches the roasting temperature for material roasting, and one heat storage chamber 4 reaches the heat storage temperature (the heat storage temperature can be obtained through temperature detection), the flue gas inlet pipe 6 and flue gas outlet pipe 9 of that heat storage chamber 4 are closed, and its air outlet pipe 8 is opened. After the flue gas in one chamber is almost exhausted through the inlet pipe 8 and the outlet pipe 15, the outlet pipe 15 is closed and the air outlet pipe 7 is opened, so that the outside air is heated through the heat storage chamber 4 and sent into the middle section of the kiln body 1 for firing. At the same time, the air inlet pipe 8 and the air outlet pipe 7 of the other heat storage chamber 4 are closed, and its flue gas inlet pipe 6 and the flue gas outlet pipe 9 are opened. The flue gas is used to heat up the heat storage body 5 of the other heat storage chamber 4 to store energy. When the heat release temperature of one heat storage chamber 4 drops by 20 to 30 degrees, the heat storage can be switched, thereby ensuring the continuity and stability of waste heat utilization. Example 2:

[0031] Combined with appendix Figure 2-3 As shown, the difference from Embodiment 1 is that, since the two flue gas inlet pipes 6, two flue gas outlet pipes 9, two air inlet pipes 8, and two air outlet pipes 7 are generally opened and closed alternately; in order to save valve costs and facilitate quick switching control, the four valves on the two heat storage chambers 4 flue gas inlet pipes 6 and air outlet pipes 7, as well as the four valves on the flue gas outlet pipes 9 and air inlet pipes 8, can be combined into two two-position six-way valves 22 respectively.

[0032] As needed, the two-position six-way valve 22 includes a valve handle 224, a hexagonal valve body 221, a cylindrical valve cavity 222, and a Z-shaped valve core 223. Each side of the hexagonal valve body 221 is provided with a channel tube connecting to the cylindrical valve cavity 222. The two sides of the Z-shaped valve core 223 are rotatably sealed to the two end walls of the cylindrical valve cavity 222, and the four corners of the Z-shaped valve core 223 are slidably sealed to the peripheral walls of the cylindrical valve cavity 222. The two corners of the same end of the Z-shaped valve core 223 can be located on both sides of the same channel tube diameter. One end of the valve handle 224 rotatably seals through the center of the end face of the hexagonal valve body 221 and is fixedly connected to the rotational symmetry center of the side of the Z-shaped valve core 223.

[0033] like Figure 2 As shown, the two-position six-way valve 22 has its channel pipe a connected to the first exhaust fan 3, channel pipes a1 and a2 connected to the two flue gas inlet pipes 6 of the two heat storage chambers 4 respectively, channel pipe b connected to the differential heat inlet pipe 16, and channel pipes b1 and b2 connected to the two air outlet pipes 7 of the two heat storage chambers 4 respectively; Figure 3As shown, the channel pipe c of another two-position six-way valve 22 is connected to the first blower 10, the channel pipes c1 and c2 are respectively connected to the two air inlet pipes 8 of the two heat storage chambers 4, the channel pipe d is connected to the flue gas treatment device 14, and the channel pipes d1 and d2 are respectively connected to the two flue gas outlet pipes 9 of the two heat storage chambers 4; while meeting the requirements for switching between the two heat storage chambers 4, the purpose of rapid switching is achieved.

[0034] In addition, the heat stabilizer box 18 is connected to a gas supply pipe 20 with a valve, and the gas supply pipe 20 is connected to a gas supply fan 21. Since flue gas in the heat storage chamber 4 may flow into the gas heating device 2 even if the vent pipe 15 is opened at the same time during rapid switching, the valve on the gas supply pipe 20 and the gas supply fan 21 can be opened briefly to prevent flue gas backflow.

[0035] Implementation Three:

[0036] Combined with appendix Figure 4-5 As shown, the difference from Embodiment 1 is that it includes a hollow heat storage rod 501, a heat storage sphere 502, and an inorganic phase change heat storage material 503; one end of the hollow heat storage rod 501 is open, and its cavity is filled with the inorganic phase change heat storage material 503. The inorganic phase change heat storage material 503 utilizes the phase change process of the substance to store and release heat. For example, heating a solid to melt it into a liquid state is an endothermic process, which is a heat storage process. When the heat source is removed, the liquid state turns into a solid state, which is an exothermic process, that is, the absorbed heat is released; the working temperature is 500-650℃, and molten salt phase change heat storage material can be selected, preferably carbonate phase change heat storage material;

[0037] The heat storage sphere 502 has a corresponding cavity that fits the hollow heat storage rod 501, with one end of the cavity open. The open end of the hollow heat storage rod 501 is located inside the cavity of the heat storage sphere 502, thus sealing the open end of the hollow heat storage rod 501 and preventing the inorganic phase change heat storage material 503 from scattering. If necessary, a graphite paper sleeve 504 is provided between the hollow heat storage rod 501 and the inner wall of the cavity of the heat storage sphere 502. The graphite paper sleeve 504 has good lubrication properties. The hollow heat storage rod 501 and the heat storage ball 502 are easily connected by threads. At the same time, the graphite paper sleeve 504 has good thermal conductivity, which facilitates heat conduction between the hollow heat storage rod 501 and the heat storage ball 502. For the heat storage tank used for the utilization of waste heat from tunnel kiln tail gas, the working temperature is 500-650℃. The hollow heat storage rod 501 and the heat storage ball 502 can be made of high-temperature resistant stainless steel to ensure that they do not melt at the working temperature. They also have good corrosion resistance, which can improve their service life.

[0038] The heat storage sphere 502 has multiple grooves 505 spaced around its circumference, and the width of the grooves 505 is smaller than the width of the protrusions on the body of the heat storage sphere 502. The grooves 505 can effectively increase the surface area of ​​the body of the heat storage sphere 502, increase the heating surface, and improve the heat storage performance. The width of the grooves 505 is smaller than the width of the protrusions on the body of the heat storage sphere 502, which can prevent two adjacent heat storage spheres 502 from being embedded in each other in the heat storage pool, thus preventing accidental blockage of the heat storage pool.

[0039] The parts of this invention not described in detail are prior art. It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims within this invention, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A continuous waste heat utilization system for tunnel kiln flue gas, characterized in that: The system includes a first exhaust fan (3), a first blower (10), a second blower (13), a kiln body (1), a heat stabilizer box (18), and two heat storage chambers (4). A gas heating device (2) is installed in the middle section of the kiln body (1). A first vent and a second vent are respectively located on the outer wall near the feed end and discharge end of the kiln body (1). A temperature measuring device is installed at the first vent, and the outlet end of the second blower (13) is connected to the second vent. A heat storage mesh plate (19) is installed inside the heat stabilizer box (18). The heat stabilizer box (18) is connected to a differential heat inlet pipe (16) and a heat stabilizer outlet pipe (17). The heat stabilizer box (18) is connected to a gas supply pipe (20) with a valve, and the gas supply pipe (20) is connected to a gas supply fan (21). Multiple heat storage bodies (5) are installed inside the heat storage chambers (4). The heat storage chambers (4) are connected to a flue gas inlet pipe (6) and a flue gas outlet pipe (9). The system includes an air inlet pipe (8), an air outlet pipe (7), and an exhaust pipe (15), and valves are installed on the flue gas inlet pipe (6), the flue gas outlet pipe (9), the air inlet pipe (8), the air outlet pipe (7), and the exhaust pipe (15); the air inlet end of the first exhaust fan (3) is connected to the first vent of the kiln body (1), and the air outlet end of the first exhaust fan (3) is connected to the two flue gas inlet pipes (6) respectively; the air outlet end of the first blower (10) is connected to the two air inlet pipes (8) respectively, the two air outlet pipes (7) are connected to the differential heat inlet pipe (16) respectively, and the stable heat outlet pipe (17) is connected to the air supply pipe of the gas heating device (2); the system also includes a second exhaust fan (12), and a third vent is provided on the outer wall of the kiln body (1) between the feed inlet and the first vent, and the air inlet end of the second exhaust fan (12) is connected to the third vent.

2. The continuous utilization system for waste heat from tunnel kiln flue gas according to claim 1, characterized in that: Two flue gas inlet pipes (6), two flue gas outlet pipes (9), two air inlet pipes (8), and two air outlet pipes (7) are opened and closed alternately; and the four valves on the flue gas inlet pipes (6) and air outlet pipes (7) of the two heat storage chambers (4), as well as the four valves on the flue gas outlet pipes (9) and air inlet pipes (8), are respectively combined into two two-position six-way valves (22).

3. The continuous utilization system for waste heat from tunnel kiln flue gas according to claim 2, characterized in that: The two-position six-way valve (22) includes a valve handle (224), a hexagonal valve body (221), a cylindrical valve cavity (222), and a Z-shaped valve core (223). Each side of the hexagonal valve body (221) is provided with a channel tube that connects to the cylindrical valve cavity (222). The two sides of the Z-shaped valve core (223) are respectively rotated and sealed with the cavity walls at both ends of the cylindrical valve cavity (222). The four corners of the Z-shaped valve core (223) are respectively slidably sealed with the circumferential cavity wall of the cylindrical valve cavity (222). The two corners of the same end of the Z-shaped valve core (223) can be located on both sides of the same channel tube diameter. One end of the valve handle (224) rotates and seals through the center of the end face of the hexagonal valve body (221) and is fixedly connected to the rotational symmetry center of the side of the Z-shaped valve core (223).

4. The continuous utilization system for waste heat from tunnel kiln flue gas according to claim 1, characterized in that: The heat storage body (5) is a heat storage ball or heat storage rod made of heat-resistant stainless steel.

5. The continuous utilization system for waste heat from tunnel kiln flue gas according to claim 1, characterized in that: The heat storage body includes a hollow heat storage rod (501), a heat storage sphere (502), and an inorganic phase change heat storage material (503); one end of the hollow heat storage rod (501) is open, and its cavity is filled with inorganic phase change heat storage material (503); the heat storage sphere (502) is provided with a concave cavity that corresponds to and fits the hollow heat storage rod (501), and one end of the concave cavity is open, with the open end of the hollow heat storage rod (501) located in the concave cavity of the heat storage sphere (502).

6. The continuous utilization system for waste heat from tunnel kiln flue gas according to claim 1, characterized in that: The flue gas outlet pipe (9) and the vent pipe (15) are connected to a flue gas treatment device (14).

7. The continuous utilization system for waste heat from tunnel kiln flue gas according to claim 1, characterized in that: The first blower (10) is equipped with an air filter (11) at its air inlet end.

8. The continuous utilization system for waste heat from tunnel kiln flue gas according to claim 1, characterized in that: Both the thermal stabilization box (18) and the heat storage chamber (4) are equipped with temperature detectors.

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