A waste incineration flue gas two-stage single-cycle waste heat utilization system and heat exchanger

Abstract

The present application relates to garbage disposal technical field, especially a kind of garbage incineration flue gas two-stage single cycle waste heat utilization system and heat exchanger, including cylinder, residue collection assembly is arranged on the cylinder, including residue dispersing member being arranged at the end of the cylinder and residue conveying compression member being arranged in the cylinder interior, the end of residue dispersing member is provided with driving element, the inside of residue conveying compression member is provided with self descaling heat exchange component, when needing to heat water, water is passed into residue conveying compression member, at this time, flue gas is passed into cylinder, at this time, flue gas is screened by residue dispersing member and residue conveying compression member and impurity is collected and compacted, then flue gas enters self descaling heat exchange component and heats water by self descaling heat exchange component, the collection and compaction of flue gas impurity are realized.

Description

Technical Field

[0001] This invention relates to the field of waste treatment technology, and in particular to a two-stage single-cycle waste heat utilization system for waste incineration flue gas and its heat exchanger. Background Technology

[0002] Waste-to-energy incineration is the best way to dispose of municipal solid waste in a way that achieves "reduction, harmlessness, and resource recovery," leading to rapid industry development. However, the process of waste-to-energy incineration produces flue gas containing various pollutants. Given that coal-fired power plants, the steel industry, the cement industry, and the coking industry are all implementing ultra-low emissions standards, and with increasingly stringent air pollutant emission standards for municipal solid waste incineration in many regions, achieving ultra-low emissions in the waste-to-energy incineration industry is an inevitable trend. Furthermore, the flue gas produced by waste incineration contains a large amount of waste heat; its rational utilization can not only improve energy efficiency but also bring significant economic and environmental benefits.

[0003] During use, existing technologies for utilizing waste heat from flue gas contain a large number of impurities, which need to be separated and collected. However, existing technologies make collection difficult and prone to impurities flying around because the impurities are relatively dispersed.

[0004] Based on this, the present invention designs a two-stage single-cycle waste heat utilization system for waste incineration flue gas and its heat exchanger to solve the above problems. Summary of the Invention

[0005] In view of the problem that flue gas residue is not easy to collect in the above or existing technologies, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a two-stage single-cycle waste heat utilization system for waste incineration flue gas and its heat exchanger.

[0007] As a preferred embodiment of the two-stage single-cycle waste heat utilization system for waste incineration flue gas of the present invention, it includes a first-stage metal heat exchanger.

[0008] The exhaust port of the primary metal heat exchanger is connected to the secondary fluoroplastic heat exchanger, and the exhaust port of the secondary fluoroplastic heat exchanger is connected to a chimney.

[0009] A circulation pump is connected between the outlet of the secondary fluoroplastic heat exchanger and the inlet of the primary metal heat exchanger.

[0010] The outlet of the primary metal heat exchanger is connected in parallel to heater A and heater B. The outlets of heater A and heater B are connected to the inlet of the secondary fluoroplastic heat exchanger. A pressure stabilizing device is installed between the secondary fluoroplastic heat exchanger and the outlets of heater A and heater B.

[0011] The primary metal heat exchanger and the air heater A connecting pipe are provided with a water outlet, and the secondary fluoroplastic heat exchanger is provided with a water return port at the water inlet.

[0012] The air inlets of heaters A and B are connected to fans.

[0013] As a preferred embodiment of the two-stage single-cycle waste heat utilization system for waste incineration flue gas of the present invention, it includes the following steps;

[0014] S1. The circulating water returned from heater B and heater A enters the secondary fluoroplastic heat exchanger and exchanges heat with the 130°C flue gas, thus initially heating the circulating water.

[0015] S2. The circulating water from the secondary fluoroplastic heat exchanger is pressurized to a pressure greater than 0.6 MPa by a circulating pump;

[0016] S3. The pressurized circulating water enters the first-stage metal heat exchanger and exchanges heat with the 170°C flue gas, further heating the circulating water.

[0017] S4. The circulating water from the primary metal heat exchanger is divided into two paths. One path enters the air heater B and the air heater A respectively, where it exchanges heat with the primary air and the secondary air respectively. After releasing heat, the circulating water passes through the pressure stabilizing device and finally returns to the secondary fluoroplastic heat exchanger to complete the entire cycle.

[0018] S5. In addition, circulating water can be drawn out through the outlet interface to heat other media that require heat, such as turbine condensate. After releasing heat, the circulating water enters the system through the return interface to absorb heat.

[0019] The beneficial effects of the waste incineration flue gas two-stage single-cycle waste heat utilization system of the present invention are as follows: The present invention, through the design of a two-stage heat exchanger, can avoid the limitations of single-material heat exchangers while giving full play to their respective advantages. The high-temperature section uses a metal heat exchanger, which makes full use of its good high-temperature resistance and avoids its relatively weak low-temperature corrosion resistance. The low-temperature section uses a fluoroplastic heat exchanger, which makes full use of its good corrosion resistance and avoids its weak high-temperature resistance.

[0020] In actual use, there is still the problem that flue gas residue is inconvenient to collect.

[0021] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a heat exchanger, comprising a two-stage single-cycle waste heat utilization system for waste incineration flue gas, and a cylindrical shell.

[0022] The residue collection assembly installed on the cylinder includes a residue dispersing component located at the end of the cylinder and a residue conveying and compressing component located inside the cylinder; wherein...

[0023] The residue dispersing component includes a rotating shaft disposed in the middle of the cylinder, a dispersing fan blade disposed at the end of the rotating shaft, and a dispersing baffle disposed at the end of the dispersing fan blade; and,

[0024] The residue conveying and compressing component includes a rotating drum disposed inside the cylinder body and a threaded conveying plate disposed on the outer wall of the rotating drum; wherein...

[0025] A collection trough is provided between the rotating drum below the threaded conveyor plate and the inner wall of the drum.

[0026] In a preferred embodiment of the heat exchanger of the present invention, the residue dispersion component further includes an air inlet pipe, and the end of the cylinder is provided with an air inlet pipe.

[0027] In a preferred embodiment of the heat exchanger of the present invention, the residue conveying and compressing component further includes an exhaust pipe, the end of the rotating drum is provided with an exhaust pipe, and the end of the rotating drum is provided with a filter screen. The end of the rotating shaft is provided with a driving component.

[0028] In a preferred embodiment of the heat exchanger of the present invention, the driving component includes a motor, the end of the cylinder is provided with a motor, the end of the motor is provided with a drive gear, the end of the drive gear is connected to a rotating shaft, the outer end of the drive gear is provided with a transmission gear, the inner wall of the end of the rotating cylinder is provided with an annular rack, and the outer end of the transmission gear is provided on the annular rack.

[0029] In a preferred embodiment of the heat exchanger of the present invention, a self-descaling heat exchange component is provided inside the rotating cylinder.

[0030] In a preferred embodiment of the heat exchanger of the present invention, the self-descaling heat exchange component includes a heat exchange element, the inside of the rotating cylinder is provided with a heat exchange element, and the inner wall of the rotating cylinder is provided with a descaling element.

[0031] As a preferred embodiment of the heat exchanger of the present invention, the heat exchange component includes a support plate, both ends of the inner cavity of the rotating cylinder are provided with support plates, an isolation baffle is provided between the two sets of support plates, a water inlet is provided at the end of the isolation baffle, a flue pipe is provided between the two sets of support plates, and a water pipe is provided on the lower support plate.

[0032] In a preferred embodiment of the heat exchanger of the present invention, the descaling component includes a reciprocating slide groove, the inner wall of the rotating drum is provided with a reciprocating slide groove, both sides of the isolation baffle are provided with scrapers, the flue pipes pass through the scrapers, the upper part of the scraper is provided with a water groove, the side wall of the scraper is provided with a limiting slider, and the end of the limiting slider is provided in the reciprocating slide groove.

[0033] The beneficial effects of the heat exchanger of the present invention are as follows: When water needs to be heated, water is introduced into the residue conveying and compressing component. At this time, flue gas is introduced into the cylinder. The flue gas is screened by the residue dispersing component and the residue conveying and compressing component, and the impurities are collected and compacted. Then, the flue gas enters the self-descaling heat exchange component and heats the water through the self-descaling heat exchange component, thereby realizing the collection and compaction of impurities in the flue gas. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the two-stage single-cycle waste heat utilization system for waste incineration flue gas of the present invention.

[0036] Figure 2 This is a schematic diagram of the overall structure of the heat exchanger of the present invention.

[0037] Figure 3 This is a schematic diagram of the motor structure of the heat exchanger of the present invention.

[0038] Figure 4 This is a schematic diagram of the threaded transport plate structure of the heat exchanger of the present invention.

[0039] Figure 5 This is a schematic diagram of the dispersed fan blade structure of the heat exchanger of the present invention.

[0040] Figure 6 This is a schematic diagram of the annular rack structure of the heat exchanger of the present invention.

[0041] Figure 7 This is a schematic diagram of the water inlet structure of the heat exchanger of the present invention.

[0042] Figure 8 This is a schematic diagram of the reciprocating sliding groove structure of the heat exchanger of the present invention.

[0043] Figure 9 This is a schematic diagram of the limiting slider structure of the heat exchanger of the present invention.

[0044] The labels in the diagram represent: 1. Cylinder; 2. Residue collection assembly; 21. Residue dispersion component; 211. Rotating shaft; 212. Dispersion fan blade; 213. Dispersion baffle; 214. Air inlet pipe; 22. Residue conveying and compressing component; 221. Rotating drum; 222. Threaded conveying plate; 223. Air outlet pipe; 224. Filter screen; 23. Drive component; 231. Motor; 232. Drive gear; 233. Transmission gear; 234. Ring rack; 3. Self-descaling heat exchange assembly; 31. Heat exchange component; 311. Support plate; 312. Isolation baffle; 313. Water inlet; 314. Smoke pipe; 315. Water pipe; 32. Descaling component; 321. Reciprocating chute; 322. Scraper; 323. Water trough; 324. Limiting slider. Detailed Implementation

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0047] 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 phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0048] Example 1, the first embodiment of the present invention, provides a two-stage single-cycle waste heat recovery system for waste incineration flue gas, including a first-stage metal heat exchanger.

[0049] The exhaust port of the primary metal heat exchanger is connected to the secondary fluoroplastic heat exchanger, and the exhaust port of the secondary fluoroplastic heat exchanger is connected to a chimney.

[0050] A circulation pump is connected between the outlet of the secondary fluoroplastic heat exchanger and the inlet of the primary metal heat exchanger.

[0051] The outlet of the primary metal heat exchanger is connected in parallel to heater A and heater B. The outlets of heater A and heater B are connected to the inlet of the secondary fluoroplastic heat exchanger. A pressure stabilizing device is installed between the secondary fluoroplastic heat exchanger and the outlets of heater A and heater B.

[0052] The primary metal heat exchanger and the air heater A connecting pipe are equipped with a water outlet, and the secondary fluoroplastic heat exchanger is equipped with a water return port at the water inlet.

[0053] The air inlets of heaters A and B are connected to fans.

[0054] A two-stage single-cycle waste heat recovery system for waste incineration flue gas includes the following steps;

[0055] S1. The circulating water returned from heater B and heater A enters the secondary fluoroplastic heat exchanger and exchanges heat with the 130°C flue gas, thus initially heating the circulating water.

[0056] S2. The circulating water from the secondary fluoroplastic heat exchanger is pressurized to a pressure greater than 0.6 MPa by a circulating pump;

[0057] S3. The pressurized circulating water enters the first-stage metal heat exchanger and exchanges heat with the 170°C flue gas, further heating the circulating water.

[0058] S4. The circulating water from the primary metal heat exchanger is divided into two paths. One path enters the air heater B and the air heater A respectively, where it exchanges heat with the primary air and the secondary air respectively. After releasing heat, the circulating water passes through the pressure stabilizing device and finally returns to the secondary fluoroplastic heat exchanger to complete the entire cycle.

[0059] S5. In addition, circulating water can be led out through the outlet interface to heat other media that require heat, such as steam turbine condensate. After releasing heat, the circulating water enters the system through the return interface to absorb heat.

[0060] By using a two-stage heat exchanger design, the limitations of single-material heat exchangers can be avoided while leveraging their respective advantages. The high-temperature section uses a metal heat exchanger to fully utilize its high-temperature resistance while avoiding its relatively weak resistance to low-temperature corrosion. The low-temperature section uses a fluoroplastic heat exchanger to fully utilize its good corrosion resistance while avoiding its weak high-temperature resistance.

[0061] Example 2, refer to Figures 2 to 8 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a heat exchanger capable of automatically collecting compacted residue. It includes a cylinder 1.

[0062] Specifically, the residue collection assembly 2 installed on the cylinder 1 includes a residue dispersing component 21 installed at the end of the cylinder 1 and a residue conveying and compressing component 22 installed inside the cylinder 1.

[0063] Furthermore, a residue collection assembly 2 is connected to the middle of the cylinder 1;

[0064] The residue collection assembly 2 includes a residue dispersing component 21. The residue dispersing component 21 is connected to the top plate of the cylinder 1. The residue conveying and compressing component 22 is connected to the inside of the cylinder 1. The middle part of the residue conveying and compressing component 22 is connected to the residue dispersing component 21.

[0065] Specifically, the residue dispersing component 21 includes a rotating shaft 211 disposed in the middle of the cylinder 1, a dispersing fan blade 212 disposed at the end of the rotating shaft 211, and a dispersing baffle 213 disposed at the end of the dispersing fan blade 212.

[0066] Furthermore, the residue dispersing component 21 includes a rotating shaft 211, which is rotatably connected to the inner top of the cylinder 1. Several sets of rotating shafts 211 are fixedly connected at equal intervals on the upper side wall of the rotating shaft 211, and a dispersing baffle 213 is fixedly connected to the top of each rotating shaft 211.

[0067] Specifically, the residue conveying and compressing component 22 includes a rotating drum 221 disposed inside the cylinder 1 and a threaded conveying plate 222 disposed on the outer wall of the rotating drum 221;

[0068] A collection trough is provided between the rotating drum 221 below the threaded conveyor plate 222 and the inner wall of the cylinder 1;

[0069] Furthermore, the residue conveying and compressing component 22 includes a rotating drum 221, which is rotatably connected to the inner bottom of the cylinder body 1. A threaded conveying plate 222 is fixedly connected to the outer wall of the rotating drum 221. One end of the threaded conveying plate 222 away from the rotating drum 221 is slidably connected to the inner wall of the cylinder body 1. A collection trough for collecting residue is provided between the bottom of the threaded conveying plate 222 and the bottom plate of the cylinder body 1.

[0070] The bottom of the rotating drum 221 is a horizontal extrusion surface;

[0071] Specifically, the residue dispersing component 21 also includes an air inlet pipe 214, which is provided at the end of the cylinder 1;

[0072] The residue conveying and compressing component 22 also includes an exhaust pipe 223, an exhaust pipe 223 is provided at the end of the rotating drum 221, and a filter screen 224 is provided at the end of the rotating drum 221.

[0073] Furthermore, the residue dispersing component 21 also includes an air inlet pipe 214, which is fixedly connected to the top plate of the cylinder 1 and is connected to the interior of the cylinder 1.

[0074] The residue conveying and compressing component 22 also includes an exhaust pipe 223. An exhaust pipe 223 is fixedly connected to the bottom plate of the rotating drum 221. The exhaust pipe 223 is connected to the inside of the drum 1. A filter screen 224 is fixedly connected to the top of the rotating drum 221. A rotating shaft 211 passes through the middle of the filter screen 224 and is rotatably connected to the filter screen 224. The lower end of the rotating shaft 211 passes through the bottom plate of the drum 1 and is rotatably connected to the drum 1.

[0075] Specifically, a drive component 23 is provided at the end of the rotating shaft 211;

[0076] The driving component 23 includes a motor 231. The motor 231 is provided at the end of the cylinder 1. The motor 231 is provided at the end of the motor 231. The end of the motor 232 is connected to the rotating shaft 211. The outer end of the motor 232 is provided with a transmission gear 233. The inner wall of the end of the rotating cylinder 221 is provided with an annular rack 234. The outer end of the transmission gear 233 is provided on the annular rack 234.

[0077] Furthermore, a drive component 23 is connected to the end of the rotating shaft 211;

[0078] The driving component 23 includes a motor 231. The motor 231 is fixedly connected to the bottom of the rotating drum 221. The output end of the motor 231 passes through the bottom plate of the rotating drum 221 and is fixedly connected to a drive gear 232. The outer end of the drive gear 232 is meshed with a transmission gear 233. The lower end of the transmission gear 233 is rotatably connected to the inner bottom of the rotating drum 221 through a rotating shaft. The lower end of the inner wall of the rotating drum 221 is fixedly connected to an annular rack 234. The outer end of the transmission gear 233 is meshed with the annular rack 234.

[0079] In use, high-temperature flue gas is injected into the cylinder 1 through the air inlet pipe 214. At this time, the motor 231 is started. The motor 231 drives the rotating shaft 211 to rotate through the drive gear 232. The rotating shaft 211 drives the dispersing fan blades 212 and the dispersing baffles 213 to rotate. The flue gas falls onto the dispersing baffles 213 through the air inlet pipe 214 and disperses under the obstruction of the dispersing baffles 213. At this time, the flue gas enters between the dispersing fan blades 212, which causes the dispersing fan blades 212 to drive the flue gas to rotate. As a result, the heavier impurities in the flue gas are thrown onto the inner wall of the cylinder 1 by the centrifugal force. And because of the obstruction of the dispersing baffles 213, the impurities will not fly above the dispersing fan blades 212, thus achieving the initial separation of impurities. The flue gas is then filtered by the filter screen 224 for secondary separation, thereby preventing larger impurities from clogging the filter screen 224.

[0080] When impurities fall onto the inner wall of cylinder 1, they fall along the inner wall of cylinder 1 onto the threaded conveyor plate 222. At this time, the drive gear 232 drives the rotating cylinder 221 and the threaded conveyor plate 222 to rotate in the opposite direction to the rotating shaft 211 through the transmission gear 233 and the ring rack 234. This causes the threaded conveyor plate 222 to continuously transport the impurities downwards from the cylinder 1. When the impurities are transported to the collection trough below the threaded conveyor plate 222 and are full, the continuous rotation of the threaded conveyor plate 222 causes the bottom plane of the threaded conveyor plate 222 to continuously squeeze the impurities in the collection trough below. As the impurities in the collection trough increase, they are continuously compacted, thus realizing the automatic conveying and collection of impurities. It can also compact the impurities, making it easier to discharge and collect them. It will not cause the impurities to be scattered and inconvenient to collect. Furthermore, as the impurities fall continuously along the rotating cylinder 221, the rotating cylinder 221 is continuously heated, thus realizing the reuse of the waste heat of the impurities.

[0081] Example 3, referring to Figures 2 to 4 and Figures 6 to 9 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a self-descaling heat exchange component 3.

[0082] Specifically, the inside of the rotating drum 221 is equipped with a self-descaling heat exchange component 3;

[0083] The self-descaling heat exchange assembly 3 includes a heat exchange element 31, which is installed inside the rotating cylinder 221, and a descaling element 32 is installed on the inner wall of the rotating cylinder 221.

[0084] Furthermore, the internal connection of the rotating drum 221 is a self-descaling heat exchange component 3;

[0085] The self-descaling heat exchange assembly 3 includes a heat exchanger 31, which is connected inside the rotating drum 221, and a descaling component 32 is connected to the inner wall of the rotating drum 221.

[0086] Specifically, the heat exchanger 31 includes a support plate 311. Both ends of the inner drum 221 are provided with support plates 311. An isolation baffle 312 is provided between the two sets of support plates 311. A water inlet 313 is opened at the end of the isolation baffle 312. A flue pipe 314 is provided between the two sets of support plates 311. A water pipe 315 is provided on the lower support plate 311.

[0087] Furthermore, the heat exchanger 31 includes a support plate 311. The upper and lower ends of the inner wall of the rotating cylinder 221 are rotatably connected to the support plate 311. The rotating shaft 211 passes through the two sets of support plates 311 and is rotatably connected to the support plates 311. An isolation baffle 312 is fixedly connected at the middle position between the two sets of support plates 311. The isolation baffle 312 divides the area between the two sets of support plates 311 into two parts. The side wall of the isolation baffle 312 is slidably connected to the inner wall of the rotating cylinder 221. Several sets of flue pipes 314 are fixedly connected between the two sets of support plates 311. The flue pipes 314 are connected to the side of the support plate 311 that is away from each other. Water pipes 315 are fixedly connected to the floor of the rotating cylinder 221 on both sides of the isolation baffle 312. The upper end of the water pipe 315 is fixedly connected to the lower support plate 311. The water pipe 315 is connected to the space between the two sets of support plates 311.

[0088] Specifically, the descaling component 32 includes a reciprocating slide groove 321. The inner wall of the rotating drum 221 is provided with a reciprocating slide groove 321. Scrapers 322 are provided on both sides of the isolation baffle 312. The flue pipes 314 pass through the scrapers 322. A water channel 323 is provided on the upper part of the scraper 322. A limit slider 324 is provided on the side wall of the scraper 322. The end of the limit slider 324 is located in the reciprocating slide groove 321.

[0089] Furthermore, the descaling component 32 includes a reciprocating slide groove 321. The inner wall of the rotating drum 221 is provided with a reciprocating slide groove 321. There is a set of scrapers 322 on both sides of the isolation baffle 312. The flue pipes 314 pass through the scrapers 322 and are slidably connected to the scrapers 322. Several sets of water channels 323 are provided on the scrapers 322. A limiting slider 324 is fixedly connected to the side wall of the scraper 322 near the inner wall of the rotating drum 221. The end of the limiting slider 324 away from the scraper 322 is slidably connected to the reciprocating slide groove 321.

[0090] The reciprocating slide 321 consists of two sets of threaded slides that are symmetrical in front and back, and the upper and lower ends of the two sets of threaded slides are connected to each other.

[0091] In use, water is supplied to one side of the isolation baffle 312 through the water pipe 315, and the water enters the other side of the isolation baffle 312 through the water inlet 313. At this time, the flue gas enters the flue pipe 314, so that the water is heated on one side of the isolation baffle 312 and then enters the other side of the isolation baffle 312 for secondary heating, ensuring that the water is fully heated.

[0092] During the water heating process, the rotating drum 221 rotates continuously, which drives the reciprocating slide 321 to rotate. This causes the limiting slider 324 of the reciprocating slide 321 to drive the scraper 322 to move up and down reciprocally. At this time, the water on both sides of the scraper 322 circulates through the water channel 323. Since the scraper 322 and the flue pipe 314 are in close sliding connection, the scraper 322 continuously rubs and scrapes the outer wall of the flue pipe 314, thereby preventing the formation of scale on the surface of the flue pipe 314 and ensuring the heat exchange efficiency of the device. Furthermore, the continuous stirring of the water in the rotating drum 221 during the movement of the scraper 322 further improves the heat exchange efficiency.

[0093] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A heat exchanger, characterized by, The utility model relates to a residue collecting device, including the barrel (1), Residue collecting assembly (2) is arranged on the barrel (1), including residue dispersion spare (21) of setting in the barrel (1) end part and residue delivery compression spare (22) of setting in the barrel (1) inside, wherein, The residue dispersion spare (21) includes a rotating shaft (211) arranged in the middle of the barrel (1), a dispersion fan blade (212) arranged at the end of the rotating shaft (211), and a dispersion baffle (213) arranged at the end of the dispersion fan blade (212), and The residue delivery compression spare (22) includes a rotating drum (221) arranged inside the barrel (1) and a threaded transport plate (222) arranged on the outer wall of the rotating drum (221), wherein The rotating drum (221) below the threaded transport plate (222) is arranged between the inner wall of the barrel (1); The inside of the rotating drum (221) is provided with a self-cleaning heat exchange assembly (3); The self-cleaning heat exchange assembly (3) includes a heat exchange member (31), the inside of the rotating drum (221) is provided with a heat exchange member (31), and the inner wall of the rotating drum (221) is provided with a descaling member (32); The heat exchange member (31) includes a support plate (311), both ends of the inside of the rotating drum (221) are provided with a support plate (311), and an isolation baffle (312) is arranged between the two groups of support plates (311), a water inlet (313) is formed at the end of the isolation baffle (312), a smoke pipe (314) is arranged between the two groups of support plates (311), and a water pipe (315) is arranged on the lower support plate (311); The descaling member (32) includes a reciprocating sliding groove (321), the inner wall of the rotating drum (221) is provided with a reciprocating sliding groove (321), and a scraper (322) is arranged on both sides of the isolation baffle (312), the smoke pipe (314) penetrates through the scraper (322), a water channel (323) is formed on the upper side of the scraper (322), a limiting sliding block (324) is arranged on the side wall of the scraper (322), and the end of the limiting sliding block (324) is arranged in the reciprocating sliding groove (321).

2. The heat exchanger of claim 1, wherein: The residue dispersion spare (21) further includes an air inlet pipe (214), and the end of the barrel (1) is provided with an air inlet pipe (214).

3. The heat exchanger of claim 2, wherein: The residue delivery compression spare (22) further includes an air outlet pipe (223), and the end of the rotating drum (221) is provided with an air outlet pipe (223), a filter screen (224) is arranged at the end of the rotating drum (221), and a driving member (23) is arranged at the end of the rotating shaft (211).

4. The heat exchanger of claim 3, wherein: The driving member (23) comprises a motor (231), the end of the barrel (1) is provided with the motor (231), the end of the motor (231) is provided with a driving gear (232), the end of the driving gear (232) is connected to the rotating shaft (211), the outer end of the driving gear (232) is provided with a transmission gear (233), the end inner wall of the rotating drum (221) is provided with an annular gear rack (234), and the outer end of the transmission gear (233) is arranged on the annular gear rack (234).

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