A new type of heat exchange device based on boiler waste heat utilization

Abstract

The present invention discloses a novel heat exchange device based on the utilization of boiler waste heat, which belongs to the field of heat exchange technology, and includes a heat exchange tube and an upper cover body and a lower cover body assembled at the upper and lower ends of the heat exchange tube through flanges, wherein the interior of the heat exchange tube is assembled with a heat exchange component along its height direction, and the top of the upper cover is assembled with a liquid guide component, and the liquid guide component includes: a heat exchange liquid guide pipe, which is distributed along the height direction of the heat exchange tube; an arc-shaped heat exchange liquid guide pipe, which is connected to the top of the heat exchange liquid guide pipe; the bottom end of the lower cover is assembled with a heat exchange bottom support component that matches the liquid guide component, and the heat exchange bottom support component includes: a heat exchange connecting pipe, which extends to the interior of the heat exchange tube and corresponds to the heat exchange liquid guide pipe, and a conical platform is fixed on the outside of the conical platform. The present invention improves the efficiency and effect of heat exchange in the process of increasing the water path through the mutual cooperation between the liquid guide component and the heat exchange bottom support component.

Description

Technical Field

[0001] The present invention relates to the field of heat exchange technology, and in particular to a novel heat exchange device based on boiler waste heat utilization. Background Art

[0002] As we all know, the inlet of the wet flue gas desulfurization tower only needs 60-80℃ flue gas. At present, the flue gas at the outlet of the dust collector of most heating companies directly enters the wet flue gas desulfurization device. At this time, the flue gas temperature is close to 130-160℃, and there is a lot of heat loss. With the popularization of wet flue gas desulfurization, more and more companies are paying attention to the utilization of the heat of the flue gas at the inlet of wet flue gas desulfurization. If this part of the heat can be effectively utilized, it will save energy and increase efficiency for heating companies. At present, heat exchange devices are generally used to reduce the flue gas temperature before the wet flue gas desulfurization device to 60-80℃. Using this heat to heat the heating return water can increase the return water temperature, reduce coal consumption, and achieve the goal of energy saving and efficiency improvement for heating companies.

[0003] Existing heat exchange devices, such as the condensation separation system for removing light components described in the authorization announcement number CN117398711B, describe a heat exchanger that exchanges heat between high-temperature flue gas and water to achieve the effect of heating the water. However, in this process, only heat exchange tubes are used to exchange heat with the water inside the cylinder. However, in this process, since the heat exchange tubes are used to radiate the water inside the cylinder, the heating rate is slow, which affects the heat exchange efficiency. At the same time, the temperature at the top of the cylinder is high, so a large amount of heat energy will be concentrated inside the upper cover, which can easily lead to the heat energy not being utilized to a limited extent and thus being lost. Therefore, the present invention provides a new heat exchange device based on the utilization of boiler waste heat. Summary of the invention

[0004] The main purpose of the present invention is to provide a new type of heat exchange device based on the utilization of boiler waste heat, which improves the efficiency and effect of heat exchange by increasing the water path through the mutual cooperation between the liquid guide component and the heat exchange base component.

[0005] To achieve the above-mentioned object, the present invention provides a novel heat exchange device based on boiler waste heat utilization, comprising a heat exchange tube and an upper cover body and a lower cover body assembled at the upper and lower ends of the heat exchange tube through flanges, wherein the interior of the heat exchange tube is assembled with a heat exchange component along its height direction, and the heat exchange component is formed by an upper cover at the upper port of the heat exchange tube, a lower cover at the lower port of the heat exchange tube, and a heat exchange tube assembly diffusely distributed between the upper cover and the lower cover, wherein the heat exchange tube enables the upper and lower parts of the heat exchange tube to communicate with each other, and a liquid guide assembly is assembled on the top of the upper cover, and the liquid guide assembly comprises:

[0006] A heat exchange liquid guide pipe, distributed along the height direction of the heat exchange pipe and inserted into the interior of the heat exchange pipe;

[0007] An arc-shaped heat exchange liquid guiding pipe is connected to the top end of the heat exchange liquid guiding pipe, and two adjacent heat exchange liquid guiding pipes in the same circumferential direction are connected through the arc-shaped heat exchange liquid guiding pipe;

[0008] The bottom end of the lower cover is equipped with a heat exchange bottom support assembly that matches the liquid guide assembly, and the heat exchange bottom support assembly includes:

[0009] The heat exchange connecting tube extends to the interior of the heat exchange tube and corresponds to the heat exchange liquid guiding tube, and a conical platform is fixed on the outside of the heat exchange connecting tube, wherein two adjacent heat exchange connecting tubes in the same circumferential direction form a group, and the bottom ends of the heat exchange connecting tubes in the same group are connected by an arc-shaped heat exchange connecting tube, and the two heat exchange connecting tubes in one group in the same circumferential direction are connected by a liquid inlet pipe and a liquid outlet pipe respectively, and the heat exchange connecting tubes are fixedly connected by a connecting frame.

[0010] Preferably, an inlet for smoke and cleaning water is provided at the top of the upper cover body.

[0011] Preferably, an outlet for discharging smoke and washing water is provided at the bottom end of the lower cover body.

[0012] Preferably, a water inlet and a water outlet are respectively provided at the upper and lower ends of the side surface of the heat exchange tube, and a water storage chamber is formed between the interior of the heat exchange tube and the heat exchange assembly.

[0013] Preferably, the outer sides of the liquid guide assembly and the heat exchange base assembly and the inner sides of the heat exchange tubes are sprayed with polytetrafluoroethylene.

[0014] Preferably, the top end of the heat exchange connecting pipe is connected to a rotating sleeve via a bearing, and a limiting tube capable of inserting the heat exchange liquid guiding pipe is connected to the top end of the rotating sleeve via a bearing, a water wheel is arranged on the inner side of the rotating sleeve, and scrapers matching the inner diameter of the heat exchange pipe are arranged at equal intervals along the circumferential direction of the rotating sleeve on the outer side.

[0015] Preferably, one end of the liquid inlet pipe and the liquid outlet pipe are both extended to the inside of the water storage chamber and are equipped with a one-way valve.

[0016] The benefits of the present invention are as follows: first, in the process of water flowing inside the liquid guiding assembly and the heat exchange base assembly, an S-shaped flow channel is formed between the heat exchange connecting pipe, the arc-shaped heat exchange connecting pipe, and the heat exchange liquid guiding pipe and the arc-shaped heat exchange liquid guiding pipe in the same circumferential direction, thereby increasing the path for water flow and improving the heat exchange effect. In this process, since the arc-shaped heat exchange liquid guiding pipes are also interconnected, when the flow channel is filled with water, the water flow will preferentially flow inside the arc-shaped heat exchange liquid guiding pipe. At the same time, the flue gas enters from the inlet end, so the flue gas temperature inside the upper cover body is the highest, so that the water can be heat exchanged faster and the heat exchange efficiency is improved. At the same time, the temperature at other positions of the flow channel is lower than the temperature at the position of the arc-shaped heat exchange liquid guiding pipe. Therefore, the path at other positions of the flow channel is longer, which increases the heat exchange time and enables the water to have sufficient heat exchange time.

[0017] Secondly, after the flue gas enters the heat exchange tube, it not only exchanges heat with the water in the water storage chamber, but also exchanges heat with the water in the flow channel. Compared with the flue gas entering the heat exchange tube, the flue gas temperature at the center of the heat exchange tube is the highest, so the heat exchange effect of the water in the flow channel at the center is also the best, thereby further improving the heat exchange effect of the water. At the same time, due to the design of the conical platform, the flow rate inside the heat exchange tube is changed. In comparison, although the flow rate is increased, the internal gas outlet is indeed reduced at the same time, so that the flue gas can stay longer in the heat exchange tube and the upper cover, thereby further improving the heat exchange effect.

[0018] Finally, for the entire heat exchanger, the temperatures inside the lower cover body, the heat exchange assembly and the upper cover body are distributed from low to high. Therefore, the process of heating up the internal temperature of the S-shaped flow channel formed between the heat exchange connecting pipe, the arc heat exchange connecting pipe and the heat exchange liquid guide pipe is to preheat the low temperature zone inside the lower cover body first, then gradually heat up the medium temperature zone inside the heat exchange assembly, and finally further heat up the high temperature zone inside the upper cover body, thereby improving the utilization of thermal energy and improving the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and advantages of the present invention become more obvious. The accompanying drawings of the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of the heat exchange tube of the present invention.

[0022] Figure 3It is a schematic diagram of the structure of the fluid replacement and drainage assembly of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the heat exchange base support assembly of the present invention.

[0024] Figure 5 It is a schematic diagram of the internal structure of the connecting section between the liquid guide component and the heat exchange base component of the present invention.

[0025] Figure 6 yes Figure 5 Enlarged structural diagram at A in the middle.

[0026] In the above figure, 100, upper cover body; 101, inlet end; 200, heat exchange cylinder; 201, water inlet end; 202, water outlet end; 203, water storage chamber; 300, lower cover body; 301, outlet end; 400, heat exchange assembly; 401, upper cover; 402, heat exchange tube; 403, lower cover; 500, liquid guide assembly; 501, heat exchange liquid guide tube; 502, arc-shaped heat exchange liquid guide tube; 600, heat exchange base assembly; 601, conical platform; 602, heat exchange connecting tube; 603, connecting frame; 604, arc-shaped heat exchange connecting tube; 605, liquid inlet tube; 606, liquid outlet tube; 607, limit tube; 608, rotating sleeve; 609, water wheel; 610, scraper. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only an embodiment of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process method system product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these process methods, products or devices.

[0029] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "center", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated device elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0030] In addition, some of the above terms may be used to express other meanings in addition to indicating a direction or position relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two device elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] See also Figure 1-Figure 6 As shown, this embodiment provides a novel heat exchange device based on boiler waste heat utilization, including a heat exchange tube 200 and an upper cover body 100 and a lower cover body 300 assembled at the upper and lower ends of the heat exchange tube 200 through flanges, wherein the interior of the heat exchange tube 200 is equipped with a heat exchange component 400 along its height direction, and the heat exchange component 400 is formed by an upper cover 401 located at the upper port position of the heat exchange tube 200, a lower cover 403 located at the lower port position of the heat exchange tube 200, and a heat exchange tube 402 diffusely distributed between the upper cover 401 and the lower cover 403. The heat exchange tube 402 connects the upper and lower parts of the heat exchange tube 200, and a liquid guide component 500 is assembled on the top of the upper cover 401, and the liquid guide component 500 includes:

[0034] The heat exchange liquid guide tube 501 is distributed along the height direction of the heat exchange tube 402 and inserted into the interior of the heat exchange tube 402;

[0035] The arc-shaped heat exchange liquid conduit 502 is connected to the top of the heat exchange liquid conduit 501, and two adjacent heat exchange liquid conduits 501 in the same circumferential direction are connected through the arc-shaped heat exchange liquid conduit 502;

[0036] In this embodiment, since the arc-shaped heat exchange liquid conduits 502 are also interconnected, when the flow channel is filled with water, the water flow will preferentially flow inside the arc-shaped heat exchange liquid conduit 502. At the same time, the flue gas enters from the inlet end 101, so the flue gas temperature inside the upper cover body 100 is the highest, thereby being able to exchange heat with water faster and improving the heat exchange efficiency.

[0037] The bottom end of the lower cover 403 is equipped with a heat exchange base assembly 600 that matches the liquid guide assembly 500, and the heat exchange base assembly 600 includes:

[0038] The heat exchange connecting tube 602 extends to the interior of the heat exchange tube 402 and corresponds to the heat exchange liquid guiding tube 501, and a conical platform 601 is fixed on the outer side of the heat exchange connecting tube 602, wherein two adjacent heat exchange connecting tubes 602 in the same circumferential direction are a group, and the bottom ends of the heat exchange connecting tubes 602 in the same group are connected by an arc-shaped heat exchange connecting tube 604, and the two heat exchange connecting tubes 602 in one group in the same circumferential direction are respectively connected by a liquid inlet pipe 605 and a liquid outlet pipe 606, and the heat exchange connecting tubes 602 are fixedly connected by a connecting frame 603. When in use, the flow velocity inside the heat exchange tube 402 is changed by the design of the conical platform 601. In comparison, although the flow velocity is increased, the internal air outlet is indeed reduced at the same time, so that the flue gas can stay longer in the heat exchange tube 402 and the upper cover body 100, thereby further improving the heat exchange effect.

[0039] In this embodiment, an inlet port 101 for smoke and cleaning water is provided at the top of the upper cover body 100. When smoke enters, the cleaning water pipe is closed, and when cleaning water enters, the smoke inlet pipe is closed.

[0040] In this embodiment, the bottom end of the lower cover body 300 is provided with an outlet end 301 for discharging smoke and washing water. When smoke is discharged, the washing water discharge pipe is closed, and when washing water is discharged, the smoke discharge pipe is closed.

[0041] In this embodiment, a water inlet 201 and a water outlet 202 are respectively formed at the upper and lower ends of the side surface of the heat exchange tube 200 , and a water storage chamber 203 is formed between the interior of the heat exchange tube 200 and the heat exchange assembly 400 .

[0042] In this embodiment, the outer sides of the liquid guide assembly 500 and the heat exchange base assembly 600 and the inner side of the heat exchange tube 402 are sprayed with polytetrafluoroethylene, and the polytetrafluoroethylene is used to improve the corrosion resistance of the liquid guide assembly 500 and the heat exchange base assembly 600.

[0043] like Figure 5and Figure 6 As shown, in this embodiment, the top of the heat exchange connecting pipe 602 is connected to a rotating sleeve 608 through a bearing, and a limiting pipe 607 capable of inserting the heat exchange liquid guide pipe 501 is connected to the top of the rotating sleeve 608 through a bearing, and a water wheel 609 is arranged on the inner side of the rotating sleeve 608, and scrapers 610 matching the inner diameter of the heat exchange tube 402 are arranged at equal intervals on the outer side of the rotating sleeve 608 along its circumferential direction. When in use, during the flow of water, the rotating sleeve 608 is driven to rotate by the water wheel 609, and the scraper 610 is driven to scrape the inner wall of the heat exchange tube 402 to remove the adsorbed impurities. It is explained here that due to the smoke A large amount of particulate matter in the air will cause the particulate matter to be adsorbed on the inner wall of the heat exchange tube 402 after long-term use, and the particulate matter is in a dry state. Therefore, the scraping of the scraper 610 indirectly enables the flue gas and water to exchange heat better during the heat exchange process. At the same time, the inner side of the scraper 610 also produces a scraping effect with the outer wall of the heat exchange liquid guide tube 501, so that the outer wall of the heat exchange liquid guide tube 501 can be cleaned to improve the heat exchange effect. Then, the particulate matter and the flushing water are flushed by the flushing water in the later cleaning, so that the mixture of the particulate matter and the flushing water is discharged through the outlet end 301, and the water after the heat exchange is completed is discharged through the water outlet end 202;

[0044] In this embodiment, one end of the liquid inlet pipe 605 and the liquid outlet pipe 606 are extended to the interior of the water storage chamber 203 and are equipped with a one-way valve. When in use, the two one-way valves are turned in opposite directions so that the liquid inlet pipe 605 can only take in liquid and the liquid outlet pipe 606 can only discharge liquid.

[0045] In summary:

[0046] The flue gas pipeline and the flushing water pipeline are connected to the inlet end 101 through a three-way valve pipe, and then the flue gas after heat exchange and the flushing water after flushing are discharged through the outlet end 301 and the three-way valve pipe respectively. At the same time, water enters from the water inlet end 201, and the water after heat exchange is discharged from the water outlet end 202. Then the water entering the water storage chamber 203 will enter the liquid inlet pipe 605. At the same time, it is explained that in the process of continuous water inflow at the water inlet end 201, the water outlet end 202 is in a closed state. Therefore, in the process of continuous water injection, the water provides flow pressure for the water to enter the heat exchange base assembly 600 and the liquid guide assembly 500. Then, in the process of water flowing inside the liquid guide assembly 500 and the heat exchange base assembly 600, the heat exchange connecting pipe 602, the arc heat exchange connecting pipe 604 and An S-shaped flow channel is formed between the heat exchange liquid conduit 501 and the arc-shaped heat exchange liquid conduit 502, which increases the path for water flow, thereby improving the heat exchange effect. In this process, since the arc-shaped heat exchange liquid conduits 502 are also interconnected, when the flow channel is filled with water, the water will flow preferentially inside the arc-shaped heat exchange liquid conduit 502. At the same time, the flue gas enters from the inlet end 101, so the flue gas temperature inside the upper cover 100 is the highest, so that the water can be heat exchanged faster, thereby improving the heat exchange efficiency. At the same time, the temperature at other positions of the flow channel is lower than the temperature at the position of the arc-shaped heat exchange liquid conduit 502, so the path at other positions of the flow channel is longer, which increases the heat exchange time, so that the water can have sufficient heat exchange time, and finally returns to the inside of the water storage chamber 203 from the liquid outlet pipe 606;

[0047] At the same time, after the flue gas enters the heat exchange tube 402, it not only exchanges heat with the water in the water storage chamber 203, but also exchanges heat with the water in the flow channel. Compared with the flue gas entering the heat exchange tube 402, the flue gas temperature at the center position of the heat exchange tube 402 is the highest, so the heat exchange effect of the water in the flow channel at the center position is also the best, thereby further improving the heat exchange effect of the water. At the same time, due to the design of the conical platform 601, the flow rate inside the heat exchange tube 402 is changed. In comparison, although the flow rate is increased, the internal gas outlet is indeed reduced at the same time, so that the flue gas can stay in the heat exchange tube 402 and the upper cover body 100 for a longer time, thereby further improving the heat exchange effect.

[0048] At the same time, for the entire heat exchanger, the temperature inside the lower cover 300, the heat exchange assembly 400 and the upper cover 100 is distributed from low to high. Therefore, the process of heating the inside of the S-shaped flow channel formed between the heat exchange connecting pipe 602, the arc-shaped heat exchange connecting pipe 604 and the heat exchange liquid guide pipe 501 and the arc-shaped heat exchange liquid guide pipe 502 is to use the low temperature area inside the lower cover 300 for preheating first, then use the medium temperature area inside the heat exchange assembly 400 for gradual heating, and finally further heat up in the high temperature area inside the upper cover 100, thereby improving the utilization of thermal energy and improving the heat exchange effect;

[0049] During the flow of water, the rotating sleeve 608 is driven to rotate by the water wheel 609, and the scraper 610 is driven synchronously to scrape the adsorbed impurities on the inner wall of the heat exchange tube 402. It is explained here that due to the large amount of particulate matter in the flue gas, after long-term use, the particulate matter will be adsorbed on the inner wall of the heat exchange tube 402, and the particulate matter is in a dry state. Therefore, the scraping of the scraper 610 indirectly enables the flue gas and water to exchange heat better during the heat exchange process. At the same time, the inner side of the scraper 610 also produces a scraping effect with the outer wall of the heat exchange liquid guide tube 501, so that the outer wall of the heat exchange liquid guide tube 501 can also be cleaned to improve the heat exchange effect. Subsequently, it is rinsed with the rinse water during the later cleaning, so that the mixture of particulate matter and rinse water is discharged through the outlet end 301, and the water after the heat exchange is completed is discharged through the water outlet end 202.

Claims

1. A novel heat exchange device based on boiler waste heat utilization, comprising a heat exchange cylinder (200) and an upper cover (100) and a lower cover (300) assembled at upper and lower ends of the heat exchange cylinder (200) via flanges, wherein: The interior of the heat exchange cylinder (200) is equipped with a heat exchange assembly (400) along its height direction, and the heat exchange assembly (400) is formed by an upper cover (401) located at the upper port position of the heat exchange cylinder (200), a lower cover (403) located at the lower port position of the heat exchange cylinder (200), and a heat exchange tube (402) distributed in a diffuse manner between the upper cover (401) and the lower cover (403), wherein the heat exchange tube (402) enables the upper and lower parts of the heat exchange cylinder (200) to communicate with each other, and is characterized in that a liquid guide assembly (500) is installed on the top of the upper cover (401), and the liquid guide assembly (500) comprises: A heat exchange liquid guide tube (501), distributed along the height direction of the heat exchange tube (402) and inserted into the interior of the heat exchange tube (402); An arc-shaped heat exchange liquid guiding pipe (502) is connected to the top end of the heat exchange liquid guiding pipe (501), and two adjacent heat exchange liquid guiding pipes (501) in the same circumferential direction are connected via the arc-shaped heat exchange liquid guiding pipe (502); The bottom end of the lower cover (403) is equipped with a heat exchange base assembly (600) that matches the liquid guide assembly (500), and the heat exchange base assembly (600) includes: The heat exchange connecting tube (602) extends into the interior of the heat exchange tube (402) and corresponds to the heat exchange liquid guiding tube (501), and a conical platform (601) is fixed on the outer side of each heat exchange connecting tube (602), wherein two adjacent heat exchange connecting tubes (602) in the same circumferential direction form a group, and the bottom ends of the heat exchange connecting tubes (602) in the same group are connected by an arc-shaped heat exchange connecting tube (604), and the two heat exchange connecting tubes (602) in one group in the same circumferential direction are connected by a liquid inlet pipe (605) and a liquid outlet pipe (606), respectively, and the heat exchange connecting tubes (602) are fixedly connected by a connecting frame (603).

2. A novel heat exchange device based on boiler waste heat utilization according to claim 1, characterized in that: The top of the upper cover body (100) is provided with an inlet end (101) for the entry of smoke and cleaning water.

3. A novel heat exchange device based on boiler waste heat utilization according to claim 1, characterized in that: An outlet (301) for discharging smoke and washing water is provided at the bottom end of the lower cover body (300).

4. The novel heat exchange device based on boiler waste heat utilization according to claim 1 is characterized in that: A water inlet (201) and a water outlet (202) are respectively provided at the upper and lower ends of the side surface of the heat exchange tube (200), and a water storage chamber (203) is formed between the interior of the heat exchange tube (200) and the heat exchange assembly (400).

5. The novel heat exchange device based on boiler waste heat utilization according to claim 1 is characterized in that: The outer sides of the liquid guide component (500) and the heat exchange base component (600) and the inner side of the heat exchange tube (402) are all sprayed with polytetrafluoroethylene.

6. The novel heat exchange device based on boiler waste heat utilization according to claim 1 is characterized in that: The top end of the heat exchange connecting pipe (602) is connected to a rotating sleeve (608) via a bearing, and a limiting pipe (607) for inserting the heat exchange liquid guide pipe (501) is connected to the top end of the rotating sleeve (608) via a bearing, and a water wheel (609) is arranged on the inner side of the rotating sleeve (608), and scrapers (610) matching the inner diameter of the heat exchange pipe (402) are arranged at equal intervals on the outer side of the rotating sleeve (608) along its circumferential direction.

7. The novel heat exchange device based on boiler waste heat utilization according to claim 4 is characterized in that: One end of the liquid inlet pipe (605) and the liquid outlet pipe (606) both extend into the interior of the water storage chamber (203) and are equipped with a one-way valve.

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