Industrial kiln waste heat recovery device

Abstract

The utility model provides an industrial kiln waste heat recovery device, and relates to the field of kilns. The industrial kiln waste heat recovery device comprises a waste heat recovery device body and a pressure control system. The pressure control system comprises a pressure sensor and a regulating valve, the pressure sensor is used for being installed at an output port of the industrial kiln, and the regulating valve is connected with the waste heat recovery device in parallel; the waste heat recovery device comprises a waste heat recovery mechanism and a main fan, the waste heat recovery mechanism is used for being communicated with an output port of the industrial kiln, the main fan is connected with the waste heat recovery mechanism in series, the main fan is located on the downstream of the waste heat recovery mechanism in the flowing direction of fluid, and the main fan is a frequency conversion fan. According to the industrial kiln waste heat recovery device, the technical problem that in the prior art, the pressure of an industrial kiln is unstable is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of kiln, in particular, relates to an industrial kiln waste heat recovery device. BACKGROUND

[0002] In the field of thermal engineering technology, industrial kiln is an important thermal equipment, widely used in metallurgy, chemical industry and building materials industries. Industrial kiln in the production process will produce a large amount of waste heat, if the waste heat can not be effectively utilized, will waste a lot of energy, cause environmental pollution and economic loss. Therefore, waste heat recovery technology has become an important means of energy saving and emission reduction and improving energy utilization efficiency.

[0003] In the field of industrial kiln technology, pressure control is one of the important factors for stable operation of industrial kiln, if the pressure of industrial kiln is unstable, it will affect the calcination effect of product, reduce the quality of product. In the existing waste heat recovery technology field, the pressure of the front end industrial kiln is not stable, the pressure of the steam pipe network is mainly controlled. Therefore, how to develop a waste heat recovery device which can recover the waste heat of industrial kiln and ensure the stable operation of industrial kiln pressure and convenient operation is an important problem faced by current technology. CONTENT OF THE INVENTION

[0004] The purpose of the embodiment of the present application is to provide an industrial kiln waste heat recovery device to alleviate the technical problem of unstable pressure of industrial kiln in the prior art.

[0005] In order to solve the above technical problems, the technical scheme provided by the present application is:

[0006] The industrial kiln waste heat recovery device provided by the present application comprises a waste heat recovery device and a pressure control system.

[0007] The pressure control system comprises a pressure sensor and an adjusting valve, the pressure sensor is used for mounting on the output port of the industrial kiln, and the adjusting valve is connected in parallel with the waste heat recovery device.

[0008] The waste heat recovery device comprises a waste heat recovery mechanism and a main fan, the waste heat recovery mechanism is used for communicating with the output port of the industrial kiln, the main fan is connected in series with the waste heat recovery mechanism, and along the flow direction of fluid, the main fan is located downstream of the waste heat recovery mechanism, and the main fan is set as a variable frequency fan.

[0009] Further, the waste heat recovery device further comprises a first on-off valve, the first on-off valve controls the on-off of the waste heat recovery mechanism and the industrial kiln.

[0010] The pressure control system further comprises a standby fan and a second on-off valve, the standby fan and the second on-off valve are connected in series and connected in parallel with the waste heat recovery device.

[0011] Further, the pressure control system further comprises a water level detection sensor installed on the waste heat recovery mechanism for detecting the water level of the waste heat recovery mechanism.

[0012] Further, the pressure control system further comprises a controller connected with the pressure sensor, the water level detection sensor, the main air blower, the regulating valve, the first switch valve, the second switch valve and the standby air blower.

[0013] Further, the regulating valve is connected with the waste heat recovery device in parallel through a bypass pipeline.

[0014] Further, the waste heat recovery device further comprises a main pipeline, and the waste heat recovery mechanism and the main air blower are installed on the main pipeline.

[0015] Further, the waste heat recovery mechanism comprises a high-temperature gas system and a water system, an input port of the high-temperature gas system is connected with an output port of the industrial kiln, and an output port of the high-temperature gas system is connected with the main air blower.

[0016] The high-temperature gas system is in contact with the water system.

[0017] Further, the high-temperature gas system comprises a left smoke chamber, a left heat exchange tube bundle, a rear smoke box, a right heat exchange tube bundle and a right smoke chamber connected in sequence, an input port of the left smoke chamber is connected with an output port of the industrial kiln, and an output port of the right smoke chamber is connected with the main air blower.

[0018] The rear smoke box is provided with a cleaning port, and a movable door is installed on the cleaning port, and the movable door controls the opening and closing of the cleaning port.

[0019] Further, the movable door is provided with a sealing element on the outer periphery, and / or the side wall of the cleaning port is provided with a sealing element.

[0020] Further, the movable door is hinged to the side wall of the cleaning port.

[0021] Based on the above technical solutions, the technical effects achieved by the present application are analyzed as follows:

[0022] The industrial kiln waste heat recovery device provided by the utility model includes a waste heat recovery device and a pressure control system; the pressure control system includes a pressure sensor and an adjusting valve, the pressure sensor is used for being installed at the output port of the industrial kiln, and the adjusting valve is connected with the waste heat recovery device in parallel; the waste heat recovery device includes a waste heat recovery mechanism and a main fan, the waste heat recovery mechanism is used for being communicated with the output port of the industrial kiln, the main fan is connected with the waste heat recovery mechanism in series, and along the flow direction of fluid, the main fan is located at the downstream of the waste heat recovery mechanism, and the main fan is arranged as a frequency conversion fan.

[0023] The pressure sensor of the industrial kiln waste heat recovery device monitors the pressure of the output port of the industrial kiln in real time, the main fan is frequency conversion speed-regulated according to the information of the pressure sensor, and the pressure of the output port of the industrial kiln is ensured through frequency conversion control. The adjusting valve is connected with the waste heat recovery device in parallel, when the pressure of the output port of the industrial kiln cannot be stabilized through frequency conversion control of the main fan, the adjusting valve is adjusted, and the pressure control stability in the industrial kiln is further ensured; the design improves the stability of the pressure control system and ensures the stable operation of the industrial kiln. Through the application of the industrial kiln waste heat recovery device, the operation pressure of the industrial kiln can be controlled to be ≤10Pa fluctuation.

[0024] The industrial kiln waste heat recovery device is convenient to operate and easy to maintain, and the convenience of operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The flow chart of the industrial kiln waste heat recovery device provided by the embodiments of the present application is provided.

[0027] Figure 2 The front view of the waste heat recovery mechanism in the industrial kiln waste heat recovery device provided by the embodiments of the present application is provided.

[0028] Figure 3 The side view of the waste heat recovery mechanism in the industrial kiln waste heat recovery device provided by the embodiments of the present application is provided.

[0029] Figure 4 The top view of the waste heat recovery mechanism in the industrial kiln waste heat recovery device provided by the embodiments of the present application is provided.

[0030] Icon:

[0031] 100 - waste heat recovery device; 110 - waste heat recovery mechanism; 111 - left smoke chamber; 112 - left heat exchange tube bundle; 113 - rear smoke box; 114 - right heat exchange tube bundle; 115 - right smoke chamber; 116 - water system; 117 - movable door; 120 - main fan; 130 - first switch valve; 140 - main pipeline; 141 - temperature detector; 142 - flow detector;

[0032] 210 - pressure sensor; 220 - regulating valve; 230 - standby fan; 240 - second switch valve; 250 - bypass pipeline; 260 - standby pipeline;

[0033] 300 - industrial furnace. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0035] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships commonly placed when the products of the present application are used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Reference is made to Figure 1The industrial kiln waste heat recovery device provided by the utility model comprises a waste heat recovery device 100 and a pressure control system; the pressure control system comprises a pressure sensor 210 and an adjusting valve 220, the pressure sensor 210 is used for being installed at the output port of the industrial kiln 300, and the adjusting valve 220 is connected in parallel with the waste heat recovery device 100; the waste heat recovery device 100 comprises a waste heat recovery mechanism 110 and a main fan 120, the waste heat recovery mechanism 110 is used for being communicated with the output port of the industrial kiln 300, the main fan 120 is connected in series with the waste heat recovery mechanism 110, and along the flow direction of fluid, the main fan 120 is located downstream of the waste heat recovery mechanism 110, and the main fan 120 is arranged as a variable frequency fan.

[0038] Specifically, high-temperature-resistant and corrosion-resistant materials are adopted on the key components of the waste heat recovery mechanism 110, the service life of the waste heat recovery mechanism 110 is prolonged, the maintenance cost is reduced, and the operation reliability is improved.

[0039] The industrial kiln waste heat recovery device can stabilize the pressure of the front-end industrial kiln 300. The pressure sensor 210 of the industrial kiln waste heat recovery device monitors the pressure of the output port of the industrial kiln 300 in real time, the main fan 120 is frequency-controlled according to the information of the pressure sensor 210, and the pressure of the output port of the industrial kiln 300 is ensured through frequency control. The adjusting valve 220 is connected in parallel with the waste heat recovery device 100, when the main fan 120 cannot adjust the stability of the pressure of the output port of the industrial kiln 300 through frequency control, the adjusting valve 220 is adjusted, and the stability of the pressure control in the industrial kiln 300 is further ensured. The stability of the pressure control system is improved, and the stable operation of the industrial kiln 300 is ensured. Through the application of the industrial kiln waste heat recovery device, the operating pressure of the industrial kiln 300 can be controlled to be ≤10Pa fluctuation. The industrial kiln waste heat recovery device is convenient to operate and easy to maintain, and the convenience of operation is improved.

[0040] The structure of the industrial kiln waste heat recovery device is described in detail as follows:

[0041] In the optional scheme of the utility model embodiment, the waste heat recovery device 100 further comprises a first on-off valve 130, the first on-off valve 130 controls the on-off of the waste heat recovery mechanism 110 and the industrial kiln 300; the pressure control system further comprises a standby fan 230 and a second on-off valve 240, and the standby fan 230 and the second on-off valve 240 are connected in series and then connected in parallel with the waste heat recovery device 100.

[0042] Specifically, the standby fan 230 is arranged between the industrial kiln 300 and the waste heat recovery device 100, when the waste heat recovery mechanism 110 or the main fan 120 fails, the first on-off valve 130 is closed, the second on-off valve 240 is opened and the standby fan 230 is started. Figure 1The standby fan 230 and the second switch valve 240 are connected in parallel with the waste heat recovery device 100 through a standby pipeline 260.

[0043] The pressure control system further comprises the standby fan 230 and the second switch valve 240, which can achieve the effect of stably controlling the pressure of the industrial kiln 300.

[0044] In an optional scheme of the embodiment of the utility model, the pressure control system further comprises a water level detection sensor, which is installed on the waste heat recovery mechanism 110 and is used for detecting the water level of the waste heat recovery mechanism 110.

[0045] Specifically, the water level detection sensor detects the water level of the waste heat recovery mechanism 110 in real time, and when the water level of the waste heat recovery mechanism 110 is low, the waste heat recovery mechanism 110 and the main fan 120 are closed, and the standby fan 230 is started to run.

[0046] According to the information of the water level detection sensor, the opening and closing of the waste heat recovery mechanism 110, the main fan 120 and the standby fan 230 are controlled, and the safety and stability of the equipment are improved.

[0047] In an optional scheme of the embodiment of the utility model, the pressure control system further comprises a controller, which is signal connected with the pressure sensor 210, the water level detection sensor, the main fan 120, the regulating valve 220, the first switch valve 130, the second switch valve 240 and the standby fan 230.

[0048] Specifically, the controller is provided with a rated maximum pressure and a rated minimum water level, and the controller can identify whether the waste heat recovery mechanism 110 and the main fan 120 are running normally; the controller is in signal connection with the pressure sensor 210, the pressure sensor 210 detects the pressure at the outlet of the industrial kiln 300 in real time and transmits the detected real-time pressure to the controller, when the controller identifies that the real-time pressure is greater than the rated maximum pressure, the controller controls to close the first control valve, the waste heat recovery mechanism 110 and the main fan 120, opens the second switch valve 240 and starts the standby fan 230. The controller is in signal connection with the water level detection sensor, the water level detection sensor detects the water level in the waste heat recovery mechanism 110 in real time and transmits the detected real-time water level value to the controller, when the controller identifies that the real-time water level value is lower than the rated minimum water level, the controller controls to close the first control valve, the waste heat recovery mechanism 110 and the main fan 120, opens the second switch valve 240 and starts the standby fan 230. The controller can identify whether the waste heat recovery mechanism 110 and the main fan 120 are running normally, when the controller identifies that the waste heat recovery mechanism 110 or the main fan 120 is faulty, the controller controls to close the first control valve, the waste heat recovery mechanism 110 and the main fan 120, opens the second switch valve 240 and starts the standby fan 230. In addition, the controller is in signal connection with the regulating valve 220, the pressure sensor 210 detects the pressure at the outlet of the industrial kiln 300 in real time and transmits the detected real-time pressure to the controller, and the controller controls the frequency conversion speed of the regulating valve 220 and the main fan 120 according to the real-time pressure, realizing automatic control. Further, the controller is set to a computer.

[0049] The controller is in signal connection with the above-mentioned multiple elements, realizing interlocking control of the waste heat recovery device of the industrial kiln, avoiding safety hazards caused by equipment failure, further ensuring safe operation of the equipment and ensuring stability of the pressure of the industrial kiln 300.

[0050] In the optional scheme of the embodiment of the utility model, the regulating valve 220 is connected in parallel with the waste heat recovery device 100 through the bypass pipeline 250.

[0051] Specifically, the input port of the bypass pipeline 250 is located between the industrial kiln 300 and the waste heat recovery mechanism 110, and the output port of the bypass pipeline 250 is located downstream of the main fan 120. The regulating valve 220 is set to a pressure regulating valve.

[0052] The bypass pipeline 250 is used for installing the regulating valve 220, and realizes that the regulating valve 220 is connected in parallel with the waste heat recovery device 100.

[0053] In the optional scheme of the embodiment of the utility model, the waste heat recovery device 100 further comprises a main pipeline 140, and the waste heat recovery mechanism 110 and the main fan 120 are both installed on the main pipeline 140.

[0054] Specifically, referring toFigure 1 One end of the main pipeline 140 is communicated with the industrial kiln 300, and the other end is emptied. In addition, in the gas flow direction, the pressure sensor 210, the first switch valve 130, the waste heat recovery mechanism 110 and the main fan 120 are sequentially installed on the main pipeline 140. Further, the temperature detector 141 and the flow detector 142 are also installed on the main pipeline 140, and the temperature detector 141 and the flow detector 142 are located upstream of the first switch valve 130.

[0055] The main pipeline 140 realizes the communication of the waste heat recovery device 100 and the industrial kiln 300.

[0056] In the optional scheme of the embodiment of the utility model, the waste heat recovery mechanism 110 includes high-temperature gas system and water system 116, the input port of high-temperature gas system is used to communicate with the output port of industrial kiln 300, and the output port is communicated with main fan 120, and high-temperature gas system contacts water system 116.

[0057] Specifically, high-temperature gas system contacts water system 116, realizes heat exchange, generates saturated steam, and outputs to steam pipe network for user use.

[0058] High-temperature gas system and water system 116 realize heat exchange, realize the heat recovery effect of industrial kiln waste heat recovery device.

[0059] In the optional scheme of the embodiment of the utility model, referring to Figures 2 to 4 High-temperature gas system includes left smoke chamber 111, left part heat exchange tube bundle 112, rear smoke box 113, right part heat exchange tube bundle 114 and right smoke chamber 115 communicated in sequence, and the input port of left smoke chamber 111 is used to communicate with the output port of industrial kiln 300, and the output port of right smoke chamber 115 is communicated with main fan 120, and rear smoke box 113 has cleaning port, and the cleaning port is installed with movable door 117, and movable door 117 controls the opening and closing of cleaning port.

[0060] Specifically, referring to Figure 4 , Figure 4 In the arrow direction of smoke gas flow, the smoke gas generated in industrial kiln 300 flows through left smoke chamber 111, left part heat exchange tube bundle 112, rear smoke box 113, right part heat exchange tube bundle 114 and right smoke chamber 115 in sequence, and flows out from right smoke chamber 115.

[0061] Movable door 117 controls the opening and closing of cleaning port, when dust in high-temperature smoke gas pollutes and accumulates ash on heat exchange surface after long-time operation, the movable door 117 of rear smoke box 113 can be opened to clean the heat exchange surface.

[0062] The movable door 117 is used for cleaning the heat exchange surface, which can effectively solve the problem of dust in high-temperature flue gas polluting and accumulating dust on the heat exchange surface after long-time operation, thereby avoiding the blockage of the left heat exchange tube bundle 112 and the right heat exchange tube bundle 114, improving the efficiency of waste heat recovery, and reducing the maintenance cost of the equipment.

[0063] In the optional scheme of the embodiment of the utility model, the outer periphery of the movable door 117 is provided with a sealing element; and / or, the side wall of the cleaning port is provided with a sealing element.

[0064] Specifically, in the embodiment, the outer periphery of the movable door 117 is provided with a sealing element, and the side wall of the cleaning port is provided with a sealing element; when the movable door 117 is closed, the sealing element seals the gap between the movable door 117 and the cleaning port, avoiding gas overflow.

[0065] In the optional scheme of the embodiment of the utility model, the movable door 117 is hinged to the side wall of the cleaning port.

[0066] Specifically, the movable door 117 is hinged to the cleaning port through a rotating shaft structure; of course, the structure that the movable door 117 is connected to the rear smoke box 113 through a screw should also be within the protection scope of the embodiment of the utility model.

[0067] The movable door 117 is hinged to the side wall of the cleaning port, which facilitates the opening and closing of the movable door 117.

[0068] The effect of the industrial furnace waste heat recovery device is described as follows:

[0069] 1. Effectively solve the blockage problem of the waste heat recovery device 100: the industrial furnace waste heat recovery device adopts the movable door 117 to clean the heat exchange surface, which can effectively solve the problem of dust in high-temperature flue gas polluting and accumulating dust on the heat exchange surface after long-time operation, thereby avoiding the blockage of the left heat exchange tube bundle 112 and the right heat exchange tube bundle 114, improving the efficiency of waste heat recovery, and reducing the maintenance cost of the equipment.

[0070] 2. Improve the stability of the pressure control system: the industrial furnace waste heat recovery device can stably control the pressure of the front-end industrial furnace 300 through the pressure control system. Specifically, the pressure control system includes multiple control modes, which can ensure the stability of the pressure of the output port of the industrial furnace 300, and at the same time, a bypass pipeline 250 is added at the outlet of the main fan 120; when the frequency control adjustment of the main fan 120 cannot stabilize the pressure of the output port of the industrial furnace 300, the regulating valve 220 of the bypass pipeline 250 is adjusted, thereby ensuring the stable control of the pressure in the industrial furnace 300. This design greatly improves the stability of the pressure control system and ensures the stable operation of the industrial furnace 300. Through the application of the technology, the operating pressure of the industrial furnace 300 can be controlled to ≤10Pa fluctuation.

[0071] 3. Improve the safety and stability of the industrial kiln waste heat recovery device: The industrial kiln waste heat recovery device is designed with interlocking control of the device, which further ensures the safe operation of the industrial kiln waste heat recovery device and ensures the stability of the pressure of the industrial kiln 300. The controller stops the operation of the waste heat recovery mechanism 110 when the water level is low, the pressure of the industrial kiln 300 is extremely high, the waste heat recovery mechanism 110 or the main fan 120 fails, and starts the operation of the standby fan 230. This design greatly improves the safety and stability of the industrial kiln waste heat recovery device, avoiding the safety hazards caused by equipment failure.

[0072] 4. Use high-temperature and corrosion-resistant materials: The technical solution uses high-temperature and corrosion-resistant materials on the key components of the waste heat recovery device 100, prolongs the service life of the equipment, and reduces the maintenance cost. This design improves the service life of the waste heat recovery device 100, reduces the maintenance cost, and improves the operation reliability of the equipment.

[0073] 5. Convenient operation: The waste heat recovery device 100 is designed to be simple and easy to operate, easy to maintain, and greatly improves the convenience of operation.

[0074] In general, the industrial kiln waste heat recovery device has better waste heat recovery efficiency, higher pressure control stability, higher safety and stability, longer service life, lower maintenance cost, and better operation convenience compared to the prior art, and has significant advantages.

[0075] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0076] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An industrial kiln waste heat recovery device characterized by, The application relates to a waste heat recovery device (100) and a pressure control system. The pressure control system comprises a pressure sensor (210) and a regulating valve (220), the pressure sensor (210) is arranged on the outlet of an industrial kiln (300), and the regulating valve (220) is connected in parallel with the waste heat recovery device (100). The waste heat recovery device (100) comprises a waste heat recovery mechanism (110) and a main fan (120), the waste heat recovery mechanism (110) is connected with the outlet of the industrial kiln (300), the main fan (120) is connected in series with the waste heat recovery mechanism (110), and the main fan (120) is arranged downstream of the waste heat recovery mechanism (110) along the flow direction of fluid, and the main fan (120) is arranged as a variable frequency fan. The waste heat recovery device (100) further comprises a first switch valve (130), which controls the connection and disconnection between the waste heat recovery mechanism (110) and the industrial kiln (300).

2. The industrial kiln waste heat recovery device according to claim 1, characterized in that, The pressure control system further comprises a standby fan (230) and a second switch valve (240), which are connected in series and connected in parallel with the waste heat recovery device (100). The pressure control system further comprises a water level detection sensor, which is arranged on the waste heat recovery mechanism (110) and used for detecting the water level of the waste heat recovery mechanism (110).

3. The industrial kiln waste heat recovery device according to claim 2, characterized in that, The pressure control system further comprises a controller, which is connected with the pressure sensor (210), the water level detection sensor, the main fan (120), the regulating valve (220), the first switch valve (130), the second switch valve (240) and the standby fan (230) in signal connection.

4. The industrial kiln waste heat recovery device according to claim 3, characterized in that, The regulating valve (220) is connected in parallel with the waste heat recovery device (100) through a bypass pipeline (250).

5. The industrial kiln waste heat recovery device according to claim 1, characterized in that, The waste heat recovery device (100) further comprises a main pipeline (140), and the waste heat recovery mechanism (110) and the main fan (120) are arranged on the main pipeline (140).

6. The industrial kiln waste heat recovery device according to claim 1, characterized in that, The waste heat recovery mechanism (110) comprises a high-temperature gas system and a water system (116), the input of the high-temperature gas system is connected with the outlet of the industrial kiln (300), and the output is connected with the main fan (120).

7. The industrial kiln waste heat recovery device according to any one of claims 1-6, characterized in that, The high-temperature gas system is in contact with the water system (116). The high-temperature gas system comprises a left smoke chamber (111), a left heat exchange tube bundle (112), a rear smoke box (113), a right heat exchange tube bundle (114) and a right smoke chamber (115) connected in sequence, the input of the left smoke chamber (111) is connected with the outlet of the industrial kiln (300), and the output of the right smoke chamber (115) is connected with the main fan (120).

8. The industrial kiln waste heat recovery device according to claim 7, characterized in that, The rear smoke box (113) is provided with a cleaning port, and a movable door (117) is arranged on the cleaning port, which controls the opening and closing of the cleaning port. ​ 9. The industrial kiln waste heat recovery device according to claim 8, characterized in that, The movable door (117) is provided with a seal on the outer periphery; and / or, the side wall of the cleaning port is provided with a seal.

10. The industrial kiln waste heat recovery device according to claim 8, characterized in that, The movable door (117) is hinged to the side wall of the cleaning port.

Images