A high-temperature flue gas waste heat recovery device

Abstract

The application discloses a high-temperature flue gas waste heat recovery device, which comprises symmetrically arranged high-efficiency heat exchange zones, a first heat exchange zone and a second heat exchange zone; the high-efficiency heat exchange zones, the first heat exchange zone and the second heat exchange zone are sequentially connected in a head-tail mode; a plate heat exchanger is arranged in the high-efficiency heat exchange zone; an input end of the plate heat exchanger penetrates through a front end of the high-efficiency heat exchange zone; an output end of the plate heat exchanger is connected with a reflux pipe; the reflux pipe is bent below the plate heat exchanger and extends into the first heat exchange zone through the high-efficiency heat exchange zone; and a second smoke pipe is arranged in the first heat exchange zone. The high-temperature flue gas waste heat recovery device comprises the high-efficiency heat exchange zones, the first heat exchange zone and the second heat exchange zone, and the three heat exchange zones are sequentially connected in a head-tail mode, multi-stage heat exchange is realized, flue gas sequentially passes through different heat exchange zones, heat is gradually transferred to air, heat recovery is more sufficient, each heat exchange zone has a compartment type structure, has good sealing performance and stability, a stable heat exchange environment is created in the heat exchange zones, and heat loss is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to a waste heat recovery system of a setting machine, in particular to a high-temperature flue gas waste heat recovery device. BACKGROUND

[0002] The setting machine is usually to first heat clean normal-temperature air to high temperature of about 150-200 DEG C by heat energy and then deliver it into the setting machine for recycling. The hot air provides drying and setting functions in the setting machine equipment. When the fabric is dried and set by high temperature, the oil from synthetic chemicals contained in the fabric is released by heat, so that the setting machine body is filled with waste heat gas such as oil fume, water vapor, chemical dye odor, etc. When the waste gas is directly discharged into the atmosphere, it will cause great pollution to the environment. The existing waste gas treatment equipment can filter, adsorb and purify chemical dye waste gas, water vapor and oil, etc. However, the generated high-temperature gas is not effectively recycled, which will produce a large amount of waste heat gas and directly discharge into the atmosphere, resulting in waste of heat energy and significant increase of temperature in the whole factory or its surrounding area, i.e. no energy recycling is realized.

[0003] The waste heat recovery system of the setting machine disclosed in Chinese patent CN113587672A sets multiple condensing components, so that the steam in the waste gas can be classified and condensed according to the condensing temperature, and the heat is classified and recovered, improving the waste gas recovery efficiency, making the chemical raw gas obtained after classified condensation simple in composition and easy to separate and recycle, reducing the pollution to the environment, and the heat exchange medium enters the heat exchange pipe of the heat exchanger from the downstream of heat recovery, and the temperature is increased after multi-stage heat exchange, and the heat is recovered by the heat energy converter and enters the setting machine, so that the heat recovery and utilization efficiency is improved.

[0004] In the prior art, the recovery of flue gas waste heat of the setting machine is generally realized by multiple heat exchangers. However, the heat exchanger itself will also have heat loss after heat absorption, especially when multiple heat exchangers are connected in series, the waste heat of the subsequent flue gas is not enough for heat exchange, and the discharged waste gas is not completely cooled, so that the flue gas waste heat cannot be used to the maximum extent. SUMMARY

[0005] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] To solve the problems in the background art, the present application adopts the following technical solutions.

[0007] A high-temperature flue gas waste heat recovery device, comprising symmetrically arranged high-efficiency heat exchange zones, a first heat exchange zone and a second heat exchange zone, the high-efficiency heat exchange zones, the first heat exchange zone and the second heat exchange zone are sequentially connected, a plate heat exchanger is arranged in the high-efficiency heat exchange zone, the input end of the plate heat exchanger penetrates the front end of the high-efficiency heat exchange zone, the output end of the plate heat exchanger is connected with a reflux pipe, and the reflux pipe is bent to below the plate heat exchanger and extends to the first heat exchange zone through the high-efficiency heat exchange zone, a second smoke pipe is arranged in the first heat exchange zone, the diameter of the second smoke pipe is larger than the diameter of the reflux pipe, the second smoke pipe is connected with the front end of the reflux pipe through a pipe adapter, the front end of the second smoke pipe extends to the second heat exchange zone through the first heat exchange zone, a plurality of third smoke pipes are arranged in the second heat exchange zone, the third smoke pipes are connected with the front end of the second smoke pipe through pipe adapters, the other ends of the third smoke pipes are connected with a waste smoke pipe joint through a pipe adapter, and the waste smoke pipe joint extends to outside the second heat exchange zone through the upper side of the second heat exchange zone.

[0008] A cold air inlet duct is arranged above the second heat exchange zone, a communication duct is arranged between the first heat exchange zone and the high-efficiency heat exchange zone to communicate the internal spaces, a hot gas pipe is arranged at the front end of the high-efficiency heat exchange zone, the hot gas pipes at the front ends of the oppositely arranged high-efficiency heat exchange zones are communicated with each other at the joint of the second heat exchange zone, and a gas outlet pipe is arranged at the joint of the two hot gas pipes, and the gas outlet pipe extends to outside the second heat exchange zone through the side of the second heat exchange zone.

[0009] The diameter of the third smoke pipe is smaller than the diameter of the reflux pipe, the plurality of third smoke pipes are installed in a circumferential manner on the pipe adapter at the front end of the second smoke pipe to form a pipe bundle, and the lower opening of the cold air inlet duct is located above the pipe bundle of the third smoke pipes.

[0010] A plurality of cooling fins are arranged on the second smoke pipe in a spaced manner, the part of the hot gas pipe in the first heat exchange zone penetrates the cooling fins, and the part of the hot gas pipe in the second heat exchange zone is bent to one side and the end portions thereof are connected.

[0011] The input end of the plate heat exchanger penetrates the high-efficiency heat exchange zone and is connected with a smoke inlet pipe, the end portion of the smoke inlet pipe is connected with a flue, a fan is arranged at the end of the flue, a connecting pipe is communicated with one side of the flue, and the end portions of the connecting pipe are jointly connected with a fault bypass pipe.

[0012] A bypass waste smoke pipe is connected with the port of the waste smoke pipe joint, the end of the bypass waste smoke pipe is connected with the fault bypass pipe, a communication waste smoke pipe is jointly connected with the upper end of the center of the bypass waste smoke pipe, a waste smoke outlet is arranged on the communication waste smoke pipe and a valve is arranged on the waste smoke outlet.

[0013] Fans are arranged at the ends of the gas outlet pipe and the cold air inlet duct, and the output ends of the fans are connected with external pipes, and the external pipe on the fan of the gas outlet pipe is connected with the head of a former.

[0014] The plate heat exchanger comprises a plurality of first smoke pipes arranged in a rectangular distribution and a pair of smoke pipe connecting boxes, one end of the first smoke pipe is sleeved with a sleeve pipe, one of the smoke pipe connecting boxes is communicated with the other end of the first smoke pipe, the other smoke pipe connecting box is communicated with the outer end of the sleeve pipe, the end of the smoke pipe connecting box communicated with the sleeve pipe is communicated with the backflow pipe, and the end of the smoke pipe connecting box communicated with the first smoke pipe is communicated with the smoke inlet pipe.

[0015] A plurality of heat dissipation plates are sleeved on the first smoke pipe at equal intervals, and a plurality of heat dissipation grooves are circumferentially and equally arranged on the outer surface of the sleeve pipe, the length of the heat dissipation groove is less than the length of the sleeve pipe, a metal bellows is arranged between the smoke pipe connecting box communicated with the sleeve pipe and the backflow pipe for connection, an extension rod is mounted outside the high-efficiency heat exchange zone, and the output end of the extension rod is connected with the outer wall of the smoke pipe connecting box communicated with the sleeve pipe.

[0016] The high-efficiency heat exchange zone, the first heat exchange zone and the second heat exchange zone are all compartment structures, and fire-fighting pipelines are arranged above the outer surfaces of the high-efficiency heat exchange zone, the first heat exchange zone and the second heat exchange zone, and a plurality of branch pipes are evenly arranged on the fire-fighting pipelines and communicated with the inside of the high-efficiency heat exchange zone, the first heat exchange zone and the second heat exchange zone.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] (1) The present application comprises a high-efficiency heat exchange zone, a first heat exchange zone and a second heat exchange zone, and the three heat exchange zones are sequentially connected end to end, realizing multi-stage heat exchange, the flue gas sequentially passes through different heat exchange zones, gradually transferring heat to the air, so that the heat recovery is more sufficient, each heat exchange zone is a compartment structure, has good sealing performance and stability, helps to create a stable heat exchange environment inside, reduces heat loss, and a communication air duct is arranged between the first heat exchange zone and the high-efficiency heat exchange zone, the hot gas pipes at the front end of the high-efficiency heat exchange zone are communicated with each other at the junction of the second heat exchange zone, etc. The communication structure ensures that the flue gas can flow smoothly in the entire device, so that each heat exchange zone works cooperatively, and the overall performance of the device is improved.

[0019] (2) The plate heat exchanger is arranged in the high-efficiency heat exchange zone, the plate heat exchanger realizes heat exchange through a plurality of first smoke pipes and other structures, the two ends of the plurality of first smoke pipes are connected with smoke pipe connecting boxes, and the heat dissipation plates and other structures help to increase the heat exchange area, improve the heat exchange efficiency of high-temperature flue gas and other media, and more effectively recover the heat in the flue gas; the device is provided with smoke pipes of different diameters, and the different pipe diameters are helpful for adaptive heat exchange in different heat exchange zones according to the state of the flue gas such as flow rate and temperature, improving the overall heat exchange effect, and a plurality of third smoke pipes are circumferentially and equally arranged on the pipe adapter at the front end of the second smoke pipe to form a pipe bundle, which is conducive to the uniform distribution of flue gas in the second heat exchange zone, thereby improving the uniformity and efficiency of heat exchange.

[0020] (3) The setting of the fault bypass pipe in the application provides an emergency passage when the device fails, when the plate heat exchanger or other components have problems, the flue gas can bypass the fault part through the fault bypass pipe, ensuring the basic operation of the entire system, and also facilitating the maintenance of the fault components without affecting the entire production process; The outer surface of the high-efficiency heat exchange zone, the first heat exchange zone and the second heat exchange zone is provided with a fire-fighting pipeline, a plurality of branch pipes are uniformly extended on the fire-fighting pipeline and are in communication with the inside, and the setting of the fire-fighting pipeline can timely spray fire extinguishing agent into the inside of the device in the event of fire and the like, thereby improving the fire safety performance of the device.

[0021] (4) The external pipe on the fan of the air outlet pipe is connected with the machine head of the shaping machine, so that the recovered heat can be directly supplied to the shaping machine and other equipment, thereby improving the practicability of the device, realizing effective utilization of waste heat, reducing energy consumption of other equipment, and the air inlet duct and the end of the air outlet pipe are both provided with a fan, which facilitates adjustment of the flow speed and flow of the gas, thereby better controlling the heat exchange process, and is also conducive to connection and adaptation with external equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The three-dimensional structure of the waste heat recovery device in the application Figure 1 .

[0023] Figure 2 The three-dimensional structure of the waste heat recovery device in the application Figure 2 .

[0024] Figure 3 The internal structure diagram of the waste heat recovery device in the application.

[0025] Figure 4 The internal partial display diagram of the waste heat recovery device in the application.

[0026] Figure 5 The internal unit three-dimensional structure diagram of the waste heat recovery device in the application.

[0027] Figure 6 The internal unit partial display diagram of the waste heat recovery device in the application.

[0028] Figure 7 The structure diagram of the plate heat exchanger in the application.

[0029] Figure 8 The internal plan view of the waste heat recovery device in the application.

[0030] The correspondence between the annotations of the drawings and the component names in the drawings is as follows:

[0031] 101. High-efficiency heat exchange zone; 1011. Plate heat exchanger; 1011a. First smoke pipe; 1011b. Radiating plate; 1011c. Smoke pipe connecting box; 1011d. Sleeve; 1011e. Metal bellow; 1011f. Telescopic rod; 1012. Return pipe; 1013. Inlet smoke pipe; 1014. Flue;

[0032] 102. First heat exchange zone; 1021. Connecting air duct; 1022. Second smoke pipe; 1023. Radiating fin; 1024. Hot gas pipe; 1025. Outlet pipe;

[0033] 103. Second heat exchange zone; 1031. Cold air inlet duct; 1032. Bypass waste smoke pipe; 1033. Connecting waste smoke pipe; 1034. Third smoke pipe; 1035. Waste smoke pipe joint;

[0034] 104. Fault bypass pipe; 1041. Connecting pipe;

[0035] 105. Fire-fighting pipe. DETAILED DESCRIPTION

[0036] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0037] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in other manners different from those described herein without departing from the scope of the present application, and those skilled in the art can make similar generalizations without departing from the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0038] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. The present application provides the following embodiments.

[0039] Reference is made to Figure 1 and Figure 2For the high-temperature flue gas waste heat recovery device structure diagram in the embodiment, the waste heat recovery device in the embodiment includes symmetrically arranged high-efficiency heat exchange zones 101, first heat exchange zones 102 and second heat exchange zones 103, the high-efficiency heat exchange zones 101, the first heat exchange zones 102 and the second heat exchange zones 103 are sequentially connected in a head-to-tail manner, the high-efficiency heat exchange zones 101, the first heat exchange zones 102 and the second heat exchange zones 103 are all in a compartment type structure, and fire-fighting pipelines 105 are arranged above the outer surfaces of the high-efficiency heat exchange zones 101, the first heat exchange zones 102 and the second heat exchange zones 103, a plurality of branch pipes are uniformly extended on the fire-fighting pipelines 105 and are in communication with the interiors of the high-efficiency heat exchange zones 101, the first heat exchange zones 102 and the second heat exchange zones 103, the above design realizes multi-stage heat exchange, flue gas sequentially passes through different heat exchange zones, heat is gradually transferred to air, heat recovery is more sufficient, each heat exchange zone is in a compartment type structure, has good sealing performance and stability, helps to create a stable heat exchange environment inside, reduces heat loss, and the arrangement of the fire-fighting pipelines can timely spray fire extinguishing agents and the like into the interior of the device in case of emergency such as fire, thereby improving the fire safety performance of the device.

[0040] Referring to Figure 3 , Figure 4 and Figure 6The high-efficiency heat exchange area 101 in the embodiment is internally provided with a plate heat exchanger 1011. The input end of the plate heat exchanger 1011 penetrates the front end of the high-efficiency heat exchange area 101. The output end of the plate heat exchanger 1011 is connected with a return pipe 1012. The return pipe 1012 is bent to the below of the plate heat exchanger 1011 and extends to the first heat exchange area 102 through the high-efficiency heat exchange area 101. The first heat exchange area 102 is internally provided with a second smoke pipe 1022. The diameter of the second smoke pipe 1022 is larger than that of the return pipe 1012. The second smoke pipe 1022 is connected with the front end of the return pipe 1012 through a pipe adapter. In the embodiment, the waste smoke generated by the setting machine is directly introduced into the plate heat exchanger 1011. After the heat is dissipated into the high-efficiency heat exchange area 101 through the plate heat exchanger 1011, the smoke enters the second smoke pipe 1022 through the return pipe 1012. At this time, the waste heat in the smoke is continuously dissipated through the second smoke pipe 1022 to spread the heat into the first heat exchange area 102. At this time, the smoke after the secondary heat dissipation has less residual heat. Therefore, the front end of the second smoke pipe 1022 extends to the second heat exchange area 103 through the first heat exchange area 102 in the embodiment. The second heat exchange area 103 is internally provided with a plurality of third smoke pipes 1034. The third smoke pipes 1034 are connected with the front end of the second smoke pipe 1022 through a pipe adapter to introduce the waste smoke into the plurality of third smoke pipes 1034. Thus, the heat is continuously introduced into the second heat exchange area 103 by using the plurality of third smoke pipes 1034. The heat dissipation surface is increased by the plurality of third smoke pipes 1034. The other end of the third smoke pipe 1034 is connected with a waste smoke pipe adapter 1035 through a pipe adapter. The waste smoke pipe adapter 1035 extends to the outside through the above of the second heat exchange area 103 to discharge the cooled waste smoke. At the same time, the embodiment is provided with a cold air inlet duct 1031 above the second heat exchange area 103. The first heat exchange area 102 and the high-efficiency heat exchange area 101 are provided with a communication duct 1021 to communicate the internal space. Thus, the cold air first enters the second heat exchange area 103 to be preheated by the heat inside the second heat exchange area 103. Since the first heat exchange area 102 and the second heat exchange area 103 are communicated, the preheated air enters the first heat exchange area 102 to be preheated again. The temperature of the air after the twice preheating is obviously increased to flow into the high-efficiency heat exchange area 101 to be rapidly heated. In order to ensure that the air can sequentially pass through the second heat exchange area 103, the first heat exchange area 102 and finally reach the high-efficiency heat exchange area 101, the embodiment is provided with a hot gas pipe 1024 at the front end of the high-efficiency heat exchange area 101. The hot gas pipes 1024 at the front end of the high-efficiency heat exchange area 101 opposite to each other are communicated at the joint of the second heat exchange area 103. The hot gas pipes 1024 are provided with an air outlet pipe 1025 at the joint. The air outlet pipe 1025 extends to the outside of the second heat exchange area 103 through the side of the second heat exchange area 103. The air outlet pipe 1025 and the cold air inlet duct 1031 are both provided with a fan at the end. The output end of the fan is connected with an external pipe. The external pipe of the fan of the air outlet pipe 1025 is connected with the head of the setting machine.The heat is directly discharged into the shaping machine head through the fan on the air outlet pipe 1025, so that the air in the whole device flows, and the fan on the cold air inlet duct 1031 makes the external cold air actively enter the device for heating, thereby increasing the air flow to a certain extent.

[0041] Referring to Figure 8 In summary, the built-in plate heat exchanger 1011 in the high-efficiency heat exchange zone 101 improves the heat exchange efficiency between high-temperature flue gas and other media, and can more effectively recover the heat in the flue gas. Further, the diameter of the third flue pipe 1034 is set to be smaller than the diameter of the return pipe 1012, and the plurality of third flue pipes 1034 are installed in a circular and equidistant manner on the pipe adapter at the front end of the second flue pipe 1022 to form a tube bundle, and the lower opening of the cold air inlet duct 1031 is located above the tube bundle of the third flue pipe 1034. The diameter of the third flue pipe 1034 is smaller than the diameter of the return pipe 1012, and the diameter of the return pipe 1012 is smaller than the diameter of the second flue pipe 1022. The different diameters help to adapt to the heat exchange in different heat exchange zones according to the state of the flue gas such as flow rate, temperature, etc., thereby improving the overall heat exchange effect. The plurality of third flue pipes 1034 are installed in a circular and equidistant manner on the pipe adapter at the front end of the second flue pipe 1022 to form a tube bundle, which is conducive to the uniform distribution of flue gas in the second heat exchange zone 103, thereby improving the uniformity and efficiency of heat exchange.

[0042] Referring to Figure 5 In the embodiment, a plurality of heat dissipation fins 1023 are equidistantly sleeved on the second flue pipe 1022 to improve the heat dissipation efficiency of the second flue pipe 1022 for the waste heat of the flue gas. In order to insulate the heated air entering the hot air pipe 1024 and make the structure of the whole device more compact, the part of the hot air pipe 1024 located in the first heat exchange zone 102 penetrates through the heat dissipation fin 1023, and the part of the hot air pipe 1024 located in the second heat exchange zone 103 is bent to the side and connected at the end, so that the hot air pipe 1024 is always located inside the device, and the surface of the hot air pipe 1024 can be wrapped with insulation material in actual use. In the embodiment, the bending of the hot air pipe 1024 in the second heat exchange zone 103 is to make room for the position of the waste flue pipe joint 1035, and the reason for not choosing to offset the position of the hot air pipe 1024 is to make most of the hot air pipe 1024 located at the center of the device, which plays a good role in insulating the hot air pipe 1024.

[0043] Referring to Figure 1 and Figure 5The input end of the plate heat exchanger 1011 in the embodiment penetrates the high-efficiency heat exchange area 101 and is connected with the smoke inlet pipe 1013, and the end of the smoke inlet pipe 1013 is connected with the flue 1014, and the end of the flue 1014 is provided with a fan, and the input end of the fan in the embodiment should be connected with the exhaust smoke outlet of the setting machine, so that the high-temperature flue gas of the setting machine is sent into the smoke inlet pipe 1013 through the fan, and then is introduced into the plate heat exchanger 1011 through the smoke inlet pipe 1013, and further, the bypass smoke pipe 1032 is connected with the port of the waste smoke pipe joint 1035 in the embodiment, and the upper end of the center of the bypass smoke pipe 1032 is commonly connected with the communication waste smoke pipe 1033, and the waste smoke outlet is opened on the communication waste smoke pipe 1033 and is provided with a valve, and the cooling flue gas after heat dissipation is discharged through the bypass smoke pipe 1032, and in actual operation, the waste smoke outlet opened on the communication waste smoke pipe 1033 should be connected with the smoke treatment device on the setting machine, so as to purify the flue gas.

[0044] It is worth noting that the connecting pipe 1041 is communicated with the side of the flue 1014 in the embodiment, the end of the connecting pipe 1041 is commonly connected with the fault bypass pipe 104, and the end of the bypass waste smoke pipe 1032 is connected with the fault bypass pipe 104, when the plate heat exchanger 1011 or other components appear problems, the flue gas can bypass the fault part through the fault bypass pipe 104, so as to ensure the basic operation of the whole system, and at the same time, the maintenance of the fault components is facilitated, and the whole production process is not affected.

[0045] Referring to Figure 7The plate heat exchanger 1011 includes a plurality of first smoke pipes 1011a arranged in a rectangular pattern, and a pair of smoke pipe connecting boxes 1011c. One end of the first smoke pipe 1011a is sleeved with a sleeve pipe 1011d. One of the smoke pipe connecting boxes 1011c is in communication with the other end of the first smoke pipe 1011a, and the other smoke pipe connecting box 1011c is in communication with the outer end of the sleeve pipe 1011d. The end of the smoke pipe connecting box 1011c in communication with the sleeve pipe 1011d is in communication with the return pipe 1012, and the end of the smoke pipe connecting box 1011c in communication with the first smoke pipe 1011a is in communication with the smoke inlet pipe 1013. In this embodiment, the length of the first smoke pipe 1011a can be extended by the sleeve pipe 1011d. When the temperature of the smoke entering is relatively high, the sleeve pipe 1011d is pulled out of the first smoke pipe 1011a, so as to increase the length of the heat dissipation pipeline of the entire plate heat exchanger 1011, and facilitate rapid heat dissipation. In order to ensure heat transfer and efficient heat exchange, the high-efficiency heat exchange area 101 is relatively sealed as a whole. Therefore, in order to drive the extension and contraction of the sleeve pipe 1011d, a telescopic rod 1011f is installed outside the high-efficiency heat exchange area 101, and the output end of the telescopic rod 1011f is connected to the outer wall of the smoke pipe connecting box 1011c in communication with the sleeve pipe 1011d. The movement of the smoke pipe connecting box 1011c in communication with the sleeve pipe 1011d is controlled by the telescopic rod 1011f, so as to drive the extension and contraction of the sleeve pipe 1011d in the first smoke pipe 1011a. In order to further increase the heat dissipation efficiency, a plurality of heat dissipation plates 1011b are sleeved on the first smoke pipe 1011a at equal intervals, and a plurality of heat dissipation grooves are circumferentially and equally arranged on the outer surface of the sleeve pipe 1011d. The heat dissipation surface is increased by the heat dissipation plates 1011b and the heat dissipation grooves. In order to prevent smoke from overflowing through the heat dissipation grooves, the length of the heat dissipation grooves is less than the length of the sleeve pipe 1011d, so as to ensure that the surfaces of the front and rear ends of the sleeve pipe 1011d are tightly attached to the inner wall of the first smoke pipe 1011a, and the smoke can only be in the first smoke pipe 1011a and the sleeve pipe 1011d. At the same time, in order to ensure that the extension and contraction of the sleeve pipe 1011d will not be interfered by the return pipe 1012, a metal bellows 1011e is arranged between the smoke pipe connecting box 1011c in communication with the sleeve pipe 1011d and the return pipe 1012 for connection. The metal bellows 1011e can be compressed and lengthened, so as to meet the space requirement when the sleeve pipe 1011d is extended and contracted.

[0046] The above is a further detailed description of the present application in combination with the specific embodiments, which cannot be considered as limiting the specific embodiments of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or replacements can be made without departing from the concept of the present application, which should be considered as falling within the protection scope determined by the claims of the present application.

Claims

1. A high-temperature flue gas waste heat recovery device, comprising symmetrically arranged high-efficiency heat exchange zones (101), first heat exchange zones (102) and second heat exchange zones (103), the high-efficiency heat exchange zones (101), the first heat exchange zones (102) and the second heat exchange zones (103) being sequentially connected end to end. characterized in that The high-efficiency heat exchange zone (101) is internally provided with a plate heat exchanger (1011), the input end of the plate heat exchanger (1011) penetrates the front end of the high-efficiency heat exchange zone (101), the output end of the plate heat exchanger (1011) is connected with a return pipe (1012), and the return pipe (1012) is bent to below the plate heat exchanger (1011) and extends to the first heat exchange zone (102) through the high-efficiency heat exchange zone (101), the plate heat exchanger (1011) comprises a plurality of first smoke pipes (1011a) arranged in a rectangular shape and a pair of smoke pipe connecting boxes (1011c), one end of the first smoke pipe (1011a) is sleeved with a sleeve pipe (1011d), one of the smoke pipe connecting boxes (1011c) is in communication with the other end of the first smoke pipe (1011a), and the other smoke pipe connecting box (1011c) is in communication with the outer end of the sleeve pipe (1011d). The first heat exchange zone (102) is internally provided with a second smoke pipe (1022), the diameter of the second smoke pipe (1022) is greater than that of the return pipe (1012), the second smoke pipe (1022) is connected with the front end of the return pipe (1012) through a pipe adapter, the front end of the second smoke pipe (1022) penetrates the first heat exchange zone (102) and extends into the second heat exchange zone (103), the second heat exchange zone (103) is internally provided with a plurality of third smoke pipes (1034), the third smoke pipes (1034) are connected with the front end of the second smoke pipe (1022) through pipe adapters, and the other end of the third smoke pipe (1034) is connected with a waste smoke pipe adapter (1035) through a pipe adapter, the waste smoke pipe adapter (1035) extends to outside the second heat exchange zone (103) through the upper part of the second heat exchange zone (103). The upper part of the second heat exchange zone (103) is provided with a cold air inlet channel (1031), a communication channel (1021) is arranged between the first heat exchange zone (102) and the high-efficiency heat exchange zone (101) to communicate the internal spaces, the front end of the high-efficiency heat exchange zone (101) is provided with a hot gas pipe (1024), the hot gas pipes (1024) at the front ends of the oppositely arranged high-efficiency heat exchange zones (101) are in communication with each other at the joint of the second heat exchange zone (103), and an air outlet pipe (1025) is arranged at the joint of the two hot gas pipes (1024), the air outlet pipe (1025) extends to outside the second heat exchange zone (103) through the side of the second heat exchange zone (103).

2. The high temperature flue gas waste heat recovery device according to claim 1, characterized in that: The diameter of the third smoke pipe (1034) is smaller than that of the return pipe (1012), the plurality of third smoke pipes (1034) are installed in a circumferential manner on the pipe adapters at the front end of the second smoke pipe (1022) to form a pipe bundle, and the lower opening of the cold air inlet channel (1031) is located above the pipe bundle of the third smoke pipes (1034).

3. The high temperature flue gas waste heat recovery device according to claim 2, characterized in that: A plurality of fins (1023) are equidistantly sleeved on the second smoke pipe (1022), and the part of the hot gas pipe (1024) located in the first heat exchange area (102) penetrates through the fins (1023), and the part of the hot gas pipe (1024) located in the second heat exchange area (103) is connected at the end after being bent to one side.

4. The high temperature flue gas waste heat recovery device according to claim 1, characterized in that: The input end of the plate heat exchanger (1011) penetrates through the high-efficiency heat exchange area (101) and is connected with the smoke inlet pipe (1013), and the end of the smoke inlet pipe (1013) is connected with the flue (1014), and the flue (1014) is provided with a fan at the end, and the flue (1014) is connected with the connecting pipe (1041) on one side, and the end of the connecting pipe (1041) is connected with the fault bypass pipe (104).

5. The high temperature flue gas waste heat recovery device according to claim 4, characterized in that: The bypass waste smoke pipe (1032) is connected to the port of the waste smoke pipe joint (1035), and the end of the bypass waste smoke pipe (1032) is connected with the fault bypass pipe (104), and the bypass waste smoke pipe (1032) is connected with the communication waste smoke pipe (1033) at the center.

6. The high temperature flue gas waste heat recovery device according to claim 1, characterized in that: The end of the air outlet pipe (1025) and the cold air inlet duct (1031) is provided with a fan, and the output end of the fan is connected with an external pipeline, and the external pipeline of the fan of the air outlet pipe (1025) is connected with the head of the setting machine.

7. The high temperature flue gas waste heat recovery device according to claim 4, characterized in that: The end of the smoke pipe connecting box (1011c) connected with the sleeve (1011d) is connected with the return pipe (1012), and the end of the smoke pipe connecting box (1011c) connected with the first smoke pipe (1011a) is connected with the smoke inlet pipe (1013), a plurality of heat dissipation plates (1011b) are equidistantly sleeved on the first smoke pipe (1011a), and a plurality of heat dissipation grooves are circumferentially and equidistantly formed on the outer surface of the sleeve (1011d), and the length of the heat dissipation groove is less than the length of the sleeve (1011d).

8. The high temperature flue gas waste heat recovery device according to claim 7, characterized in that: The metal bellows (1011e) is arranged between the smoke pipe connecting box (1011c) connected with the sleeve (1011d) and the return pipe (1012) to connect them, and the telescopic rod (1011f) is arranged outside the high-efficiency heat exchange area (101), and the output end of the telescopic rod (1011f) is connected with the outer wall of the smoke pipe connecting box (1011c) connected with the sleeve (1011d).

9. The high temperature flue gas waste heat recovery device according to claim 1, characterized in that: The high-efficiency heat exchange area (101), the first heat exchange area (102) and the second heat exchange area (103) are all compartmentalized structures, and fire-fighting pipelines (105) are arranged above the outer surfaces of the high-efficiency heat exchange area (101), the first heat exchange area (102) and the second heat exchange area (103), and a plurality of branch pipes are uniformly arranged on the fire-fighting pipelines (105) and are connected with the interiors of the high-efficiency heat exchange area (101), the first heat exchange area (102) and the second heat exchange area (103).

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