High-temperature flue gas waste heat recovery device

Abstract

The high-temperature flue gas waste heat recovery device comprises an efficient heat exchange area, a first heat exchange area and a second heat exchange area which are symmetrically arranged, the efficient heat exchange area, the first heat exchange area and the second heat exchange area are sequentially connected end to end, a plate heat exchanger is arranged in the efficient heat exchange area, and the input end of the plate heat exchanger penetrates through the front end of the efficient heat exchange area; the output end of the plate heat exchanger is connected with a backflow pipe, the backflow pipe is bent to the position below the plate heat exchanger and penetrates through the efficient heat exchange area to extend into the first heat exchange area, and a second smoke pipe is arranged in the first heat exchange area. The heat exchanger comprises the efficient heat exchange area, the first heat exchange area and the second heat exchange area, the three heat exchange areas are sequentially connected end to end, multi-stage heat exchange is achieved, flue gas sequentially passes through the different heat exchange areas, heat is gradually transferred to air, heat recovery is more sufficient, each heat exchange area is of a compartment structure, good sealing performance and stability are achieved, and the heat exchanger is suitable for large-scale popularization and application. And a stable heat exchange environment can be built inside, and heat loss is reduced.

Description

Technical Field

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

[0002] The setting machine usually heats clean room temperature air to a high temperature of about 150°C to 200°C with heat energy before conveying 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 at high temperature, the grease produced by the artificial synthetic chemicals contained in the fabric will be released by the heat, so the inside of the setting machine body is filled with waste heat such as oil smoke, water vapor, chemical dye odor, etc. When the waste gas is directly discharged into the atmosphere, it will cause great pollution to the environment. Although the existing waste gas treatment equipment can filter, adsorb and purify the chemical dye waste gas, water vapor and grease generated by the setting machine through treatment, the high-temperature gas generated is not effectively recycled, and a large amount of waste heat will be generated and directly discharged into the atmosphere. In addition to causing a waste of heat energy, it also makes the temperature of the entire factory building or its surroundings rise significantly, that is, energy recycling is not achieved.

[0003] The waste heat recovery system of the setting machine disclosed in Chinese invention patent CN113587672A is characterized by the fact that, by setting multiple condensation components, the steam in the exhaust gas can be graded and condensed according to the condensation temperature, and the heat can be graded and recovered, thereby improving the efficiency of exhaust gas recovery. The chemical raw material gas obtained after graded condensation has a simple composition and is easy to separate and then recycle for reuse, while reducing the pollution to the environment. The heat exchange medium enters the heat exchange tube of the heat exchanger from the downstream of the heat recovery, and the temperature rises after multiple stages of heat exchange. After passing through the heat energy converter, the heat is recovered and enters the setting machine, thereby increasing the efficiency of heat recovery.

[0004] In the prior art, the recovery of flue gas waste heat from the setting machine is usually achieved through multiple heat exchangers, but the heat exchanger itself will also suffer heat loss after absorbing heat, especially when multiple heat exchangers work in series, the waste heat of the subsequent flue gas is not sufficient to be exchanged through heat exchange, and the exhausted exhaust gas is not completely cooled, so the waste heat of the flue gas cannot be utilized to the maximum extent. Summary of the invention

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

[0006] In order to solve the problems raised in the above background technology, the present invention adopts the following technical solutions.

[0007] A high-temperature flue gas waste heat recovery device comprises a symmetrically arranged high-efficiency heat exchange zone, a first heat exchange zone and a second heat exchange zone, the high-efficiency heat exchange zone, the first heat exchange zone and the second heat exchange zone are connected end to end in sequence, a plate heat exchanger is built in the high-efficiency heat exchange zone, the input end of the plate heat exchanger passes through the front end of the high-efficiency heat exchange zone, the output end of the plate heat exchanger is connected with a return pipe, and the return pipe is bent to the bottom of the plate heat exchanger and passes through the high-efficiency heat exchange zone to extend into the first heat exchange zone, a second smoke pipe is built in the first heat exchange zone, the diameter of the second smoke pipe is larger than the diameter of the return pipe, the second smoke pipe is connected to the front end of the return pipe through a pipe adapter, the front end of the second smoke pipe passes through the first heat exchange zone and extends into the second heat exchange zone, a plurality of third smoke pipes are built in the second heat exchange zone, the third smoke pipe is connected to the front end of the second smoke pipe through a pipe adapter, the other end of the third smoke pipe is connected to a waste smoke pipe joint through a pipe adapter, and the waste smoke pipe joint passes through the top of the second heat exchange zone and extends to the outside of the second heat exchange zone;

[0008] A cold air inlet duct is arranged above the second heat exchange zone, a connecting air duct is arranged between the first heat exchange zone and the high-efficiency heat exchange zone to connect the internal spaces, a hot air pipe is arranged at the front end of the high-efficiency heat exchange zone, the hot air pipes at the front end of the relatively arranged high-efficiency heat exchange zone are connected to each other at the junction of the second heat exchange zone, and an air outlet pipe is arranged at the connection of the two hot air pipes, and the air outlet pipe runs through the side of the second heat exchange zone and extends outside the second heat exchange zone.

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

[0010] A plurality of heat sinks are equidistantly sleeved on the second smoke pipe, and the portion of the hot gas pipe located in the first heat exchange zone passes through the heat sink, and the portion of the hot gas pipe located in the second heat exchange zone is bent to one side and the ends thereof are connected.

[0011] The input end of the plate heat exchanger passes through the high-efficiency heat exchange zone and is connected to a smoke inlet pipe, and the end of the smoke inlet pipe is connected to a flue. A fan is provided at the end of the flue. A connecting pipe is connected to one side of the flue, and the ends of the connecting pipe are commonly connected to a fault bypass pipe.

[0012] The port of the waste smoke pipe joint is connected to a bypass waste smoke pipe, and the end of the bypass waste smoke pipe is connected to the fault bypass pipe. The upper end of the center of the bypass waste smoke pipe is commonly connected to a connecting waste smoke pipe, and a waste smoke outlet is opened on the connecting waste smoke pipe and a valve is set.

[0013] Fans are installed at the ends of the air outlet pipe and the cold air inlet duct, and the output end of the fan is connected with an external pipeline, wherein the external pipeline on the fan of the air outlet pipe is connected with the head of the shaping machine.

[0014] The plate heat exchanger includes a plurality of first smoke tubes distributed in a rectangular shape and a pair of smoke tube connection boxes, one end of the first smoke tube is slidably sleeved with a sleeve, one smoke tube connection box is connected to the other end of the first smoke tube, the other smoke tube connection box is connected to the outer end of the sleeve, the end of the smoke tube connection box connected to the sleeve is connected to the return pipe, and the end of the smoke tube connection box connected to the first smoke tube is connected to the smoke inlet pipe.

[0015] A plurality of heat dissipation plates are equidistantly sleeved on the first smoke pipe, and a plurality of heat dissipation grooves are equidistantly provided on the outer surface of the sleeve in a circular manner, wherein the length of the heat dissipation grooves is smaller than the length of the sleeve, and a metal bellows is provided between a smoke pipe connection box and a return pipe connected to the sleeve for connection, and a telescopic rod is installed outside the high-efficiency heat exchange area, and an output end of the telescopic rod is connected to an outer wall of a smoke pipe connection box connected to the sleeve.

[0016] The high-efficiency heat exchange zone, the first heat exchange zone and the second heat exchange zone are all box-type structures, and fire-fighting pipes are arranged above the outer surfaces of the high-efficiency heat exchange zone, the first heat exchange zone and the second heat exchange zone. Multiple branch pipes are evenly extended on the fire-fighting pipes and are connected to the interior 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 present invention has the following beneficial effects:

[0018] (1) The present invention includes a high-efficiency heat exchange zone, a first heat exchange zone and a second heat exchange zone, and these three heat exchange zones are connected end to end in sequence to achieve multi-stage heat exchange. The flue gas passes through different heat exchange zones in sequence and gradually transfers heat to the air, so that the heat recovery is more sufficient. Each heat exchange zone is a box-type structure with good sealing and stability, which helps to create a stable heat exchange environment inside and reduce heat loss. A connecting air duct is provided between the first heat exchange zone and the high-efficiency heat exchange zone, and the hot air pipe at the front end of the high-efficiency heat exchange zone is interconnected at the junction of the second heat exchange zone. Such connecting structures ensure that the flue gas can flow smoothly in the entire device, enable the various heat exchange zones to work together, and improve the overall performance of the device.

[0019] (2) In the present invention, a plate heat exchanger is built into the high-efficiency heat exchange zone. The plate heat exchanger realizes heat exchange through a plurality of first smoke tubes and other structures. The two ends of the plurality of first smoke tubes are connected to a smoke tube connection box, and structures such as a heat sink help to increase the heat exchange area, thereby improving the heat exchange efficiency between high-temperature flue gas and other media, and can more effectively recover the heat in the flue gas; the device is provided with smoke tubes of different diameters, and the setting of different tube diameters helps to perform adaptive 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, and a plurality of third smoke tubes are equidistantly installed in a circular manner on the pipe adapter at the front end of the second smoke tube to form a tube bundle, which is conducive to the uniform distribution of the flue gas in the second heat exchange zone, thereby improving the uniformity and efficiency of the heat exchange.

[0020] (3) The provision of the fault bypass pipe in the present invention provides an emergency passage in the event of a fault in the device. When a problem occurs in the plate heat exchanger or other components, the fault bypass pipe can be used to allow smoke to bypass the faulty part, thereby ensuring the basic operation of the entire system and facilitating the repair of the faulty component without affecting the entire production process. A fire-fighting pipeline is provided above the outer surface of the high-efficiency heat exchange zone, the first heat exchange zone, and the second heat exchange zone. Multiple branch pipes are evenly extended on the fire-fighting pipeline and are connected to the interior. The provision of the fire-fighting pipeline can spray fire extinguishing agents into the interior of the device in a timely manner in the event of an emergency such as a fire, thereby improving the fire safety performance of the device.

[0021] (4) The external pipe on the fan of the air outlet pipe is connected to the head of the setting machine, so that the recovered heat can be directly supplied to the setting machine and other equipment, which improves the practicality of the device, realizes the effective utilization of waste heat, and reduces the energy consumption of other equipment. Fans are installed at the end of the cold air inlet duct and the air outlet pipe to facilitate the adjustment of the flow speed and flow of the gas, so as to better control the heat exchange process, and it is also conducive to the connection and adaptation with external equipment. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0024] Figure 3 This is a diagram of the internal structure of the waste heat recovery device in the present invention.

[0025] Figure 4 This is a partial internal diagram of the waste heat recovery device in the present invention.

[0026] Figure 5 It is a three-dimensional structural diagram of the internal units of the waste heat recovery device in the present invention.

[0027] Figure 6 This is a partial display diagram of the internal unit of the waste heat recovery device in the present invention.

[0028] Figure 7 This is a structural diagram of the plate heat exchanger in the present invention.

[0029] Figure 8 It is an internal plan view of the waste heat recovery device in the present invention.

[0030] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0031] 101, high-efficiency heat exchange area; 1011, plate heat exchanger; 1011a, first smoke pipe; 1011b, heat sink; 1011c, smoke pipe connection box; 1011d, sleeve; 1011e, metal bellows; 1011f, telescopic rod; 1012, return pipe; 1013, smoke inlet pipe; 1014, flue;

[0032] 102, first heat exchange area; 1021, connecting air duct; 1022, second smoke pipe; 1023, heat sink; 1024, hot air pipe; 1025, air outlet pipe;

[0033] 103, second heat exchange area; 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 pipeline. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0039] See also Figure 1 and Figure 21 is a structural diagram of the high-temperature flue gas waste heat recovery device in this embodiment. The waste heat recovery device in this embodiment includes a symmetrically arranged high-efficiency heat exchange zone 101, a first heat exchange zone 102 and a second heat exchange zone 103. The high-efficiency heat exchange zone 101, the first heat exchange zone 102 and the second heat exchange zone 103 are connected end to end in sequence. In this embodiment, the high-efficiency heat exchange zone 101, the first heat exchange zone 102 and the second heat exchange zone 103 are all box-type structures, and a fire-fighting pipeline 105 is arranged above the outer surface of the high-efficiency heat exchange zone 101, the first heat exchange zone 102 and the second heat exchange zone 103. The fire-fighting pipeline 105 05, multiple branch pipes are evenly extended to communicate with the high-efficiency heat exchange area 101, the first heat exchange area 102 and the second heat exchange area 103. The above design realizes multi-stage heat exchange. The flue gas passes through different heat exchange areas in turn, and gradually transfers heat to the air, so that the heat recovery is more sufficient. Each heat exchange area is a box-type structure with good sealing and stability, which is helpful to create a stable heat exchange environment inside and reduce heat loss. The setting of the fire-fighting pipeline can spray fire extinguishing agents into the device in time when an emergency such as a fire occurs, thereby improving the fire safety performance of the device.

[0040] See also Figure 3 , Figure 4 as well as Figure 6In this embodiment, the high-efficiency heat exchange zone 101 has a built-in plate heat exchanger 1011, the input end of the plate heat exchanger 1011 passes through the front end of the high-efficiency heat exchange zone 101, and the output end of the plate heat exchanger 1011 is connected to a return pipe 1012, and the return pipe 1012 is bent to the bottom of the plate heat exchanger 1011 and passes through the high-efficiency heat exchange zone 101 and extends into the first heat exchange zone 102. The first heat exchange zone 102 has a built-in second smoke pipe 1022, the diameter of the second smoke pipe 1022 is larger than the diameter of the return pipe 1012, and the second smoke pipe 1022 is connected to the front end of the return pipe 1012 through a pipe adapter. In this embodiment, the waste smoke generated by the setting machine is directly introduced into the plate heat exchanger 1011, and the heat is dissipated to the high-efficiency heat exchange zone 101 through the plate heat exchanger 1011 After that, the flue gas enters the second flue pipe 1022 through the return pipe 1012. At this time, the residual heat in the flue gas continues to dissipate through the second flue pipe 1022, and the heat is diffused into the first heat exchange zone 102. At this time, the flue gas that has undergone secondary heat dissipation has less residual heat. Therefore, in this embodiment, the front end of the second flue pipe 1022 passes through the first heat exchange zone 102 and extends to the second heat exchange zone 103. The second heat exchange zone 103 is built with a plurality of third flue pipes 1034. The third flue pipe 1034 is connected to the front end of the second flue pipe 1022 through a pipe adapter, and the waste flue gas is introduced into the plurality of third flue pipes 1034, so that the heat is continuously introduced into the second heat exchange zone 103 by using a large number of third flue pipes 1034. The heat dissipation surface is increased by a large number of third flue pipes 1034, and The other end of the third smoke pipe 1034 is connected to a waste smoke pipe joint 1035 through a pipe adapter. The waste smoke pipe joint 1035 extends through the top of the second heat exchange zone 103 to the outside to discharge the cooled waste smoke. At the same time, in this embodiment, a cold air inlet duct 1031 is arranged above the second heat exchange zone 103. A connecting duct 1021 is arranged between the first heat exchange zone 102 and the high-efficiency heat exchange zone 101 to connect the internal spaces, so that the cold air first enters the second heat exchange zone 103 and is preheated once by the internal heat of the second heat exchange zone 103. Since the first heat exchange zone 102 and the second heat exchange zone 103 are connected, the air preheated once enters the first heat exchange zone 102 for secondary preheating. Subsequently, the temperature of the air preheated twice is significantly increased, and then flows into the high-efficiency heat exchange zone 101. The temperature in the heat exchange zone 101 is rapidly raised. To ensure that the air can pass through the second heat exchange zone 103 and the first heat exchange zone 102 in sequence as planned and finally reach the high-efficiency heat exchange zone 101, a hot air pipe 1024 is provided at the front end of the high-efficiency heat exchange zone 101 in this embodiment. The hot air pipes 1024 at the front end of the relatively high-efficiency heat exchange zone 101 are interconnected at the junction of the second heat exchange zone 103, and an air outlet pipe 1025 is provided at the connection of the hot air pipe 1024. The air outlet pipe 1025 passes through the side of the second heat exchange zone 103 and extends to the outside of the second heat exchange zone 103. Fans are installed at the ends of the air outlet pipe 1025 and the cold air inlet duct 1031, and the output end of the fan is connected to an external pipeline, wherein the external pipeline on the fan of the air outlet pipe 1025 is connected to the head of the shaping machine.The fan on the air outlet pipe 1025 absorbs heat and directly discharges it into the head of the setting machine, so that the air in the entire device can flow. The fan on the cold air inlet duct 1031 allows the external cold air to actively enter the device for heating, which increases the air flow to a certain extent.

[0041] See also Figure 8 In summary, in this embodiment, the plate heat exchanger 1011 built in the high-efficiency heat exchange zone 101 improves the heat exchange efficiency between the high-temperature flue gas and other media, and can more effectively recover the heat in the flue gas. Furthermore, in this embodiment, the diameter of the third smoke pipe 1034 is set to be smaller than the diameter of the return pipe 1012, and multiple third smoke pipes 1034 are equidistantly installed in a circular manner on the pipe adapter at the front end of the second smoke 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 smoke pipe 1034. The diameter of the third smoke tube 1034 is smaller than that of the return tube 1012, and the diameter of the return tube 1012 is smaller than that of the second smoke tube 1022. The setting of different tube diameters is helpful to perform adaptive 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. In addition, multiple third smoke tubes 1034 are installed in a circular and equidistant manner on the pipe adapter at the front end of the second smoke tube 1022 to form a tube bundle, which is beneficial to the uniform distribution of flue gas in the second heat exchange zone 103, thereby improving the uniformity and efficiency of heat exchange.

[0042] See also Figure 5 In this embodiment, a plurality of heat sinks 1023 are equidistantly sleeved on the second smoke pipe 1022. The heat sinks 1023 improve the efficiency of the second smoke pipe 1022 in dissipating waste heat from the flue gas. In order to insulate the heated air entering the hot air pipe 1024 and make the structure of the entire device more compact, in this embodiment, the portion of the hot air pipe 1024 located in the first heat exchange zone 102 passes through the heat sink 1023, and the portion of the hot air pipe 1024 located in the second heat exchange zone 103 is bent to one side and its ends are connected, 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 when actually used. In this embodiment, the bending of the hot air pipe 1024 in the second heat exchange zone 103 is a concession made to avoid conflicting with the position of the waste smoke pipe joint 1035, and the reason why the position of the hot air pipe 1024 is not selected to be offset is to make most of the hot air pipe 1024 located in the center of the device, which has a good effect on the insulation of the hot air pipe 1024.

[0043] See also Figure 1 and Figure 5In this embodiment, the input end of the plate heat exchanger 1011 passes through the high-efficiency heat exchange zone 101 and is connected to a smoke inlet pipe 1013, and the end of the smoke inlet pipe 1013 is connected to a flue 1014. A fan is provided at the end of the flue 1014. In this embodiment, the input end of the fan should be connected to the exhaust smoke outlet of the setting machine, so that the high-temperature smoke of the setting machine is sent into the smoke inlet pipe 1013 through the flue 1014 by the fan, and then introduced into the plate heat exchanger 1011 through the smoke inlet pipe 1013, and then In the first step, in this embodiment, a bypass waste smoke pipe 1032 is connected to the port of the waste smoke pipe joint 1035, and the upper end of the center of the bypass waste smoke pipe 1032 is commonly connected to a connecting waste smoke pipe 1033. A waste smoke outlet is opened on the connecting waste smoke pipe 1033 and a valve is provided. The cooling smoke after heat dissipation is discharged through the bypass waste smoke pipe 1032. In actual operation, the waste smoke outlet opened on the connecting waste smoke pipe 1033 should be connected to the smoke treatment device on the setting machine to purify the smoke.

[0044] It is worth noting that in this embodiment, a connecting pipe 1041 is connected to one side of the flue 1014, and the ends of the connecting pipe 1041 are commonly connected to the fault bypass pipe 104. The end of the bypass waste smoke pipe 1032 is connected to the fault bypass pipe 104. When a problem occurs with the plate heat exchanger 1011 or other components, the flue gas can bypass the faulty part through the fault bypass pipe 104 to ensure the basic operation of the entire system. At the same time, it is also convenient to repair the faulty components without affecting the entire production process.

[0045] See also Figure 7The plate heat exchanger 1011 includes a plurality of first smoke tubes 1011a distributed in a rectangular shape and a pair of smoke tube connection boxes 1011c. One end of the first smoke tube 1011a is slidably sleeved with a sleeve 1011d. One of the smoke tube connection boxes 1011c is connected to the other end of the first smoke tube 1011a, and the other smoke tube connection box 1011c is connected to the outer end of the sleeve 1011d. The end of the smoke tube connection box 1011c connected to the sleeve 1011d is connected to the return pipe 1012, and the end of the smoke tube connection box 1011c connected to the first smoke tube 1011a is connected to the smoke inlet pipe 1012. 1013 is connected. In this embodiment, the length of the first smoke pipe 1011a can be extended by the sleeve 1011d. When the temperature of the incoming smoke is high, the sleeve 1011d is pulled out from the first smoke pipe 1011a, thereby increasing the length of the heat dissipation pipeline of the entire plate heat exchanger 1011, which is convenient for rapid heat dissipation. To ensure heat transfer, the high-efficiency heat exchange area 101 is relatively sealed as a whole. Therefore, in order to drive the expansion and contraction of the sleeve 1011d, a telescopic rod 1011f is installed outside the high-efficiency heat exchange area 101 in this embodiment, and the output end of the telescopic rod 1011f is connected to the smoke pipe connected to the sleeve 1011d. The outer wall of the connecting box 1011c is connected, and the movement of the smoke pipe connecting box 1011c connected to the sleeve 1011d is controlled by the telescopic rod 1011f, thereby driving the sleeve 1011d to expand and contract in the first smoke pipe 1011a. In order to further increase the heat dissipation efficiency, in this embodiment, a plurality of heat dissipation plates 1011b are equidistantly sleeved on the first smoke pipe 1011a, and a plurality of heat dissipation grooves are equidistantly opened on the outer surface of the sleeve 1011d in a circular manner. The heat dissipation surface is increased by the heat dissipation plates 1011b and the heat dissipation grooves. Further, in order to prevent the smoke from overflowing through the heat dissipation grooves, the length of the heat dissipation grooves in this embodiment is less than The length of the sleeve 1011d is ensured to ensure that the surfaces at the front and rear ends of the sleeve 1011d are tightly fitted with the inner wall of the first smoke pipe 1011a, ensuring that the smoke can only be in the first smoke pipe 1011a and the sleeve 1011d. At the same time, to ensure that the expansion and contraction of the sleeve 1011d will not be interfered by the return pipe 1012, this implementation encourages the provision of a metal bellows 1011e between the smoke pipe connection box 1011c connected to the sleeve 1011d and the return pipe 1012 for connection. The metal bellows 1011e can be compressed and stretched to meet the space required for expansion and contraction of the sleeve 1011d.

[0046] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the claims submitted for the present invention.

Claims

1. A high-temperature flue gas waste heat recovery device, comprising a symmetrically arranged high-efficiency heat exchange zone (101), a first heat exchange zone (102) and a second heat exchange zone (103), wherein the high-efficiency heat exchange zone (101), the first heat exchange zone (102) and the second heat exchange zone (103) are connected end to end in sequence, Features: The high-efficiency heat exchange zone (101) has a built-in plate heat exchanger (1011), the input end of the plate heat exchanger (1011) passes through the front end of the high-efficiency heat exchange zone (101), the output end of the plate heat exchanger (1011) is connected to a return pipe (1012), and the return pipe (1012) is bent to the bottom of the plate heat exchanger (1011) and passes through the high-efficiency heat exchange zone (101) and extends into the first heat exchange zone (102). The heat exchanger (1011) comprises a plurality of first smoke tubes (1011a) distributed in a rectangular shape and a pair of smoke tube connection boxes (1011c); one end of the first smoke tube (1011a) is slidably sleeved with a sleeve (1011d); one of the smoke tube connection boxes (1011c) is connected to the other end of the first smoke tube (1011a); and the other smoke tube connection box (1011c) is connected to the outer end of the sleeve (1011d); A second smoke tube (1022) is built into the first heat exchange zone (102), the diameter of the second smoke tube (1022) is larger than the diameter of the return tube (1012), the second smoke tube (1022) is connected to the front end of the return tube (1012) via a pipe adapter, the front end of the second smoke tube (1022) passes through the first heat exchange zone (102) and extends into the second heat exchange zone (103), a plurality of third smoke tubes (1034) are built into the second heat exchange zone (103), the third smoke tubes (1034) are connected to the front end of the second smoke tube (1022) via a pipe adapter, the other end of the third smoke tube (1034) is connected to a waste smoke tube joint (1035) via a pipe adapter, the waste smoke tube joint (1035) passes through the top of the second heat exchange zone (103) and extends to the outside of the second heat exchange zone (103); A cold air inlet duct (1031) is arranged above the second heat exchange zone (103), and a connecting air duct (1021) is arranged between the first heat exchange zone (102) and the high-efficiency heat exchange zone (101) so that the internal spaces are connected. A hot air pipe (1024) is arranged at the front end of the high-efficiency heat exchange zone (101), and the hot air pipes (1024) at the front ends of the relatively arranged high-efficiency heat exchange zones (101) are connected to each other at the intersection of the second heat exchange zone (103), and an air outlet pipe (1025) is arranged at the connection between the two hot air pipes (1024), and the air outlet pipe (1025) passes through the side of the second heat exchange zone (103) and extends to the outside of the second heat exchange zone (103).

2. The high-temperature flue gas waste heat recovery device according to claim 1 is characterized in that: The diameter of the third smoke pipe (1034) is smaller than the diameter of the return pipe (1012), and a plurality of third smoke pipes (1034) are equidistantly installed in a circular pattern on the pipe adapter at the front end of the second smoke 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 smoke pipes (1034).

3. The high-temperature flue gas waste heat recovery device according to claim 2 is characterized in that: A plurality of heat sinks (1023) are equidistantly sleeved on the second smoke pipe (1022), and the portion of the hot air pipe (1024) located in the first heat exchange zone (102) passes through the heat sink (1023). The portion of the hot air pipe (1024) located in the second heat exchange zone (103) is bent to one side and its ends are connected.

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

5. The high-temperature flue gas waste heat recovery device according to claim 4 is characterized in that: The port of the waste smoke pipe joint (1035) is connected to a bypass waste smoke pipe (1032), and the end of the bypass waste smoke pipe (1032) is connected to the fault bypass pipe (104). The upper end at the center of the bypass waste smoke pipe (1032) is commonly connected to a connecting waste smoke pipe (1033), and a waste smoke outlet is provided on the connecting waste smoke pipe (1033) and a valve is arranged.

6. The high-temperature flue gas waste heat recovery device according to claim 1 is characterized in that: Fans are installed at the ends of the air outlet pipe (1025) and the cold air inlet duct (1031), and the output end of the fan is connected to an external pipeline, wherein the external pipeline on the fan of the air outlet pipe (1025) is connected to the head of the shaping machine.

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

8. The high-temperature flue gas waste heat recovery device according to claim 7 is characterized in that: A metal bellows (1011e) is provided between the smoke pipe connection box (1011c) connected to the sleeve (1011d) and the return pipe (1012) for connection; 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 connection box (1011c) connected to 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 box-type structures, and a fire-fighting pipeline (105) is arranged above the outer surface 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 evenly extend from the fire-fighting pipeline (105) to communicate with the interior 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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