Boiler flue gas waste heat gradient utilization device

Abstract

The invention relates to the technical field of boiler flue gas waste heat utilization, in particular to a boiler flue gas waste heat gradient utilization device which comprises a second emission heat recovery main body, a fixed mounting disc, a first emission heat recovery main body and a third emission heat recovery main body. The second emission heat recovery body is disposed at an upper end of the first emission heat recovery body, and the third emission heat recovery body is disposed at an upper end of the second emission heat recovery body. Stepped waste heat recovery treatment can be carried out through the arranged heat exchange holes and the third discharged heat recovery main body, and different media can be heated and utilized along with proceeding of different stages of heat recovery, so that heat in flue gas conveyed and discharged in the equipment is reasonably and fully utilized; and different media are heated and recovered through stepped heat, and it can be ensured that heat in smoke is reasonably and fully utilized.

Description

Technical Field

[0001] The invention relates to the technical field of boiler flue gas waste heat utilization, in particular to a boiler flue gas waste heat cascade utilization device. Background Art

[0002] The utilization of boiler flue gas waste heat is an important energy-saving means. By recovering the heat carried in the flue gas and converting it into usable energy, efficient energy utilization is achieved. However, the existing boiler flue gas waste heat recovery and utilization devices cannot fully utilize the heat inside the emitted flue gas, and the efficiency of heat utilization and conversion is low. At the same time, the dust inside the flue gas cannot be cleaned in time and fully, which will greatly affect the reasonable recovery and utilization of heat, and the intercepted and filtered dust cannot be automatically cleaned in time. Therefore, a device is needed to solve the above-mentioned problems. Summary of the invention

[0003] In view of the problems in the prior art, the present invention provides a boiler flue gas waste heat cascade utilization device.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a boiler flue gas waste heat cascade utilization device, including a second emission heat recovery body, a fixed installation plate, a first emission heat recovery body and a third emission heat recovery body, the fixed installation plate is fixedly connected to the bottom end of the first emission heat recovery body, the second emission heat recovery body is arranged at the upper end of the first emission heat recovery body, and the third emission heat recovery body is arranged at the upper end of the second emission heat recovery body.

[0005] Preferably, the first discharge heat recovery body includes a first conveying discharge pipe, a filter screen, a fixed connection support frame and a first electric push rod, the fixed connection support frame is fixedly connected to the side end of the first conveying discharge pipe, the filter screen is slidably clamped in the interior of the first conveying discharge pipe, the first electric push rod is symmetrically fixedly installed on the fixed connection support frame, and the front end of the first electric push rod is fixedly connected to the outer end of the filter screen.

[0006] Preferably, the second discharge heat recovery body includes a second delivery discharge pipe, a first delivery hose, a first solenoid valve, a sealing connection plate and a drainage frame, the drainage frame is fixedly connected to the side end of the second delivery discharge pipe, and the two drainage frames are staggered at the side ends of the second delivery discharge pipe, the sealing connection plate is fixedly connected to the outer end of the drainage frame by bolts, a heat collection frame is symmetrically fixedly installed on the inner side of the sealing connection plate, the first solenoid valve is symmetrically fixedly installed on the sealing connection plate, the first delivery hose is fixedly connected to the outer end of the first solenoid valve, and the first delivery hose is connected to the inside of the heat collection frame.

[0007] Preferably, a second solenoid valve is fixedly installed between the drainage frame and the second transport and discharge pipe, the outside of the drainage frame and the second transport and discharge pipe are both provided with an insulation layer made of rock wool, and the end of the heat collection frame is inserted into the interior of the second transport and discharge pipe.

[0008] Preferably, the third waste heat recovery body includes a first waste heat recovery part, a third conveying and discharging pipe, a baffle adjustment plate, a third electric push rod, an adjustment disk and a second waste heat recovery part, the adjustment disk is fixedly connected to the bottom end of the third conveying and discharging pipe, the baffle adjustment plate is slidably clamped in the inside of the adjustment disk, the third electric push rod is fixedly connected to the side end of the adjustment disk, and the front end of the third electric push rod is fixedly connected to the side end of the baffle adjustment plate, the first waste heat recovery part and the second waste heat recovery part are staggered on the side end of the third conveying and discharging pipe, and the first waste heat recovery part and the second waste heat recovery part have the same structure.

[0009] Preferably, the first waste heat recovery part and the second waste heat recovery part both include a heat recovery frame, a sealed connection card frame, a heat recovery plate, a heat exchange hole, a temperature control valve, a connecting pipe, a second delivery hose, a sealed connection card fixing plate, a third solenoid valve and a third delivery hose, the sealed connection card frame is fixedly connected to the inner end of the heat recovery frame, the heat recovery plate is evenly fixedly connected to both sides of the sealed connection card frame, and the heat recovery plate located on the outside is located inside the heat recovery frame, the heat exchange holes are evenly penetrated and opened on the heat recovery plate, the sealed connection card fixing plate is fixedly connected to the outer end of the heat recovery frame by bolts, the third solenoid valve is symmetrically fixedly installed on the upper end of the heat recovery frame, the third delivery hose is fixedly connected to the upper end of the third solenoid valve, the temperature control valve is fixedly connected to the outside of the bottom end of the heat recovery frame, the connecting pipe is fixedly connected to the outer end of the temperature control valve, and the second delivery hose is fixedly connected to the outer end of the connecting pipe.

[0010] Preferably, the sealing connection card frame is fixedly inserted on the third conveying and discharging pipe, and the heat recovery plate arranged on the inner side is inserted into the interior of the third conveying and discharging pipe.

[0011] Preferably, the bottom end of the regulating disk is fixedly connected to the upper end of the second conveying and discharging pipe, and the bottom end of the second conveying and discharging pipe is fixedly connected to the first conveying and discharging pipe.

[0012] Preferably, the heat recovery plate is made of aluminum.

[0013] Preferably, a support mounting platform is fixedly installed on the upper end of the fixedly connected support frame, a sliding adjustment frame is slidably clamped on the support mounting platform, a storage tank is fixedly installed inside the upper end of the sliding adjustment frame, a second electric push rod is symmetrically fixedly installed on the upper end of the support mounting platform, and the bottom end of the second electric push rod is fixedly connected to the sliding adjustment frame, an air pump is fixedly installed on the upper front end of the support mounting platform, and the air pump is connected to the upper end of the storage tank, and a nozzle is evenly fixedly arranged on the bottom end of the sliding adjustment frame.

[0014] Beneficial effects of the present invention:

[0015] 1. The present invention can perform step-by-step waste heat recovery processing through the heat exchange holes and the third exhaust heat recovery body, and different media can be heated and utilized as the heat recovery proceeds at different stages, so that the heat inside the flue gas transported and discharged by the equipment is reasonably and fully utilized, and the step-by-step heat recovery of different media can ensure that the heat in the flue gas is reasonably and fully utilized.

[0016] 2. In the present invention, when the flue gas enters the first discharge heat recovery body, the dust in the flue gas is first filtered by the filter screen, so that the dust in the flue gas is intercepted and filtered by the filter screen, and the clean water stored in the storage tank is sprayed and discharged from each nozzle, so that the filter screen discharged from the first conveying discharge pipe can be flushed, so that the dust intercepted on the filter screen can be automatically cleaned at a regular time, and the operation can be continuous and stable. Starting the second electric push rod can control the sliding adjustment frame to slide and rise along the inside of the supporting installation platform, and control the use height and position of the nozzle, so that the filter screen can be flushed efficiently and thoroughly. Starting the third electric push rod can control the sliding of the baffle adjustment plate inside the adjustment disk, which can control the speed of flue gas emission, and indirectly adjust and control the time that the flue gas stays in the equipment, so that the heat in the flue gas can be fully recovered and utilized in a step-by-step manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the main body of the present invention from the front perspective;

[0019] Figure 2 It is a schematic diagram of the side-view stereoscopic structure of the main body in the present invention;

[0020] Figure 3 This is a schematic diagram of the main structure of the first exhaust heat recovery in the present invention;

[0021] Figure 4 This is a schematic diagram of the bottom structure of the first exhaust heat recovery body in the present invention;

[0022] Figure 5 This is a schematic diagram of the second exhaust heat recovery main structure in the present invention;

[0023] Figure 6 This is a schematic diagram of the split structure of the second exhaust heat recovery body in the present invention;

[0024] Figure 7 This is a schematic diagram of the third exhaust heat recovery main structure in the present invention;

[0025] Figure 8 It is a schematic structural diagram of the second waste heat recovery unit in the present invention.

[0026] In the figure: 1-second discharge heat recovery body, 2-fixed installation plate, 3-first discharge heat recovery body, 4-third discharge heat recovery body, 5-first delivery discharge pipe, 6-filter screen, 7-fixed connection support frame, 8-first electric push rod, 9-support installation platform, 10-second electric push rod, 11-storage tank, 12-sliding adjustment frame, 13-air pump, 14-nozzle, 15-second delivery discharge pipe, 16-first delivery hose, 17-first solenoid valve, 18-sealed connection plate , 19- drainage frame, 20- second solenoid valve, 21- heat collection frame, 22- first waste heat recovery part, 23- third delivery discharge pipe, 24- baffle adjustment plate, 25- third electric push rod, 26- adjustment disk, 27- second waste heat recovery part, 28- heat recovery frame, 29- sealing connection card frame, 30- heat recovery plate, 31- heat exchange hole, 32- temperature control valve, 33- connecting pipe, 34- second delivery hose, 35- sealing connection clamping plate, 36- third solenoid valve, 37- third delivery hose. DETAILED DESCRIPTION

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

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described 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 comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] The present invention is further described below in conjunction with the accompanying drawings.

[0030] Example 1

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a boiler flue gas waste heat cascade utilization device of the present invention includes a second discharge heat recovery body 1, a fixed installation disk 2, a first discharge heat recovery body 3 and a third discharge heat recovery body 4, the fixed installation disk 2 is fixedly connected to the bottom end of the first discharge heat recovery body 3, the second discharge heat recovery body 1 is arranged at the upper end of the first discharge heat recovery body 3, and the third discharge heat recovery body 4 is arranged at the upper end of the second discharge heat recovery body 1, the first discharge heat recovery body 3 includes a first conveying and discharging pipe 5, a filter screen plate 6, a fixed connection support frame 7 and a first electric push rod 8, the fixed connection support frame 7 is fixedly connected to the side end of the first conveying and discharging pipe 5, the filter screen plate 6 is slidably clamped in the inside of the first conveying and discharging pipe 5, the first electric push rod 8 is symmetrically fixedly installed on the fixed connection support frame 7, the front end of the first electric push rod 8 is fixedly connected to the outer end of the filter screen plate 6, and the large dust particles in the flue gas are filtered through the first conveying and discharging pipe 5.

[0032] like Figure 5 and Figure 6As shown, the second discharge heat recovery body 1 includes a second delivery discharge pipe 15, a first delivery hose 16, a first solenoid valve 17, a sealing connection plate 18 and a drainage frame 19, the drainage frame 19 is fixedly connected to the side end of the second delivery discharge pipe 15, and the two drainage frames 19 are staggered at the side end of the second delivery discharge pipe 15, the sealing connection plate 18 is fixedly connected to the outer end of the drainage frame 19 by bolts, the inner side of the sealing connection plate 18 is symmetrically fixedly installed with a heat collection frame 21, the first solenoid valve 17 is symmetrically fixedly installed on the sealing connection plate 18, the first delivery hose 16 is fixedly installed The first conveying hose 16 is connected to the outer end of the first solenoid valve 17 and is communicated with the interior of the heat collection frame 21. The heat in the flue gas can be reasonably and fully recovered and utilized through the drainage frame 19 and the heat collection frame 21 that are staggeredly distributed on the side end of the second conveying and exhaust pipe 15. A second solenoid valve 20 is fixedly arranged between the drainage frame 19 and the second conveying and exhaust pipe 15. The outside of the drainage frame 19 and the second conveying and exhaust pipe 15 are both provided with an insulation layer made of rock wool. The end of the heat collection frame 21 is inserted into the interior of the second conveying and exhaust pipe 15, so that the heat in the flue gas can be fully utilized.

[0033] like Figure 7 As shown, the third waste heat recovery body 4 includes a first waste heat recovery part 22, a third conveying and discharging pipe 23, a baffle adjustment plate 24, a third electric push rod 25, an adjustment disk 26 and a second waste heat recovery part 27. The adjustment disk 26 is fixedly connected to the bottom end of the third conveying and discharging pipe 23, and the baffle adjustment plate 24 is slidably engaged in the inside of the adjustment disk 26. The third electric push rod 25 is fixedly connected to the side end of the adjustment disk 26, and the front end of the third electric push rod 25 is fixedly connected to the side end of the baffle adjustment plate 24. The first waste heat recovery part 22 and the second waste heat recovery part 27 are staggeredly distributed on the side end of the third conveying and discharging pipe 23, and the first waste heat recovery part 22 has the same structure as the second waste heat recovery part 27. Starting the third electric push rod 25 can control the baffle adjustment plate 24 to slide inside the adjustment disk 26, which can control the speed of flue gas discharge, and indirectly adjust and control the time that the flue gas stays in the device, so that the heat in the flue gas can be fully recovered and utilized in a step-by-step manner.

[0034] like Figure 8As shown, the first waste heat recovery part 22 and the second waste heat recovery part 27 both include a heat recovery frame 28, a sealed connection card frame 29, a heat recovery plate 30, a heat exchange hole 31, a temperature control valve 32, a connecting pipe 33, a second delivery hose 34, a sealed connection card fixing plate 35, a third solenoid valve 36 and a third delivery hose 37. The sealed connection card frame 29 is fixedly connected to the inner end of the heat recovery frame 28, and the heat recovery plate 30 is evenly fixedly connected to both sides of the sealed connection card frame 29, and the heat recovery plate 30 located on the outside is located inside the heat recovery frame 28, and the heat exchange hole 31 is evenly opened through On the heat recovery plate 30, the sealing connection fixing plate 35 is fixedly connected to the outer end of the heat recovery frame 28 by bolts, the third solenoid valve 36 is symmetrically fixedly installed on the upper end of the heat recovery frame 28, the third delivery hose 37 is fixedly connected to the upper end of the third solenoid valve 36, the temperature control valve 32 is fixedly connected to the outer side of the bottom end of the heat recovery frame 28, the connecting pipe 33 is fixedly connected to the outer end of the temperature control valve 32, and the second delivery hose 34 is fixedly connected to the outer end of the connecting pipe 33. The heat recovery plate 30 is set up so that heat exchange can be carried out fully and quickly, so that the heat can be fully utilized.

[0035] The sealing connection card frame 29 is fixedly inserted on the third conveying and discharging pipe 23, and the heat recovery plate 30 arranged inside is inserted into the interior of the third conveying and discharging pipe 23, so as to fully complete the heat absorption process.

[0036] The bottom end of the regulating disk 26 is fixedly connected to the upper end of the second conveying and exhausting pipe 15, and the bottom end of the second conveying and exhausting pipe 15 is fixedly connected to the first conveying and exhausting pipe 5, so that the smoke can be smoothly conveyed and exhausted.

[0037] The heat recovery plate 30 is made of aluminum, which can quickly and fully complete heat exchange and heat transfer.

[0038] The working principle of embodiment 1 is as follows: the device can be fixedly installed at a designated position by means of a fixed installation plate 2. After the device is fixedly installed, the flue gas first enters the first discharge heat recovery body 3, and the filter screen 6 first inserted into the first conveying and exhausting pipe 5 filters the dust in the flue gas, so that the dust in the flue gas is intercepted and filtered by the filter screen 6, and the first electric push rod 8 is started to make the filter screen 6 slide out from the inside of the first conveying and exhausting pipe 5 for cleaning. After the dust in the flue gas is processed, the flue gas will enter the inside of the second conveying and exhausting pipe 15. At this time, the flue gas transported in the second conveying and exhausting pipe 15 is being transported in the second conveying and exhausting pipe 15. The heat collection frame 21 inserted into the second delivery and discharge pipe 15 will be heated. At this time, the hot water in the heat collection frame 21 can be heated, and the flue gas transported in the second delivery and discharge pipe 15 will be transported to the inside of the drainage frame 19 set at the side end of the second delivery and discharge pipe 15, so as to heat the entire heat collection frame 21 in the drainage frame 19 by heat transfer, so that the clean water in the heat collection frame 21 is heated and then transported for use, so that the heat in the flue gas is reasonably recycled for the first time, and the clean water in the heat collection frame 21 can be replenished and discharged in time through the first delivery hose 16, so that the heated water in the heat collection frame 21 can be circulated and discharged for use and replenished in time, so that the heating can be carried out continuously;

[0039] After the exhaust flue gas completes the heat recovery and utilization for the first time, it is continuously transported from the second delivery and discharge pipe 15 to the inside of the third delivery and discharge pipe 23. At this time, the gas and oil in the first waste heat recovery unit 22 and the second waste heat recovery unit 27 can recycle and reuse the heat in the flue gas for the second and third times. The flue gas that first enters the third delivery and discharge pipe 23 will be fully heat-transferred by the heat recovery plate 30 in the second waste heat recovery unit 27 to the heat recovery plate 30 inside the heat recovery frame 28, and the oil medium in the heat recovery frame 28 can be quickly heated and heated to make the temperature The heat can be collected and utilized reasonably, and the heat exchange holes 31 arranged on the heat recovery plate 30 can make full use of the heat. Similarly, the gas transported in the first waste heat recovery part 22 can recycle the heat inside the flue gas after two heat utilizations, so that the internal heat can be fully recycled before the flue gas is discharged. The third electromagnetic valve 36 can be activated by the third delivery hose 37 to add different media to the heat recovery frame 28. After heating to the specified temperature, the temperature control valve 32 automatically opens to discharge the heated medium from 34 for use.

[0040] Starting the third electric push rod 25 can control the sliding of the baffle adjustment plate 24 inside the adjustment disk 26, which can control the speed of smoke emission and indirectly adjust and control the time the smoke stays in the device, so that the heat in the smoke can be fully recycled and utilized in a step-by-step manner.

[0041] Example 2

[0042] On the basis of Example 1, Figure 3 and Figure 4 As shown, a support installation platform 9 is fixedly installed on the upper end of the fixedly connected support frame 7, a sliding adjustment frame 12 is slidably connected to the support installation platform 9, a storage tank 11 is fixedly installed inside the upper end of the sliding adjustment frame 12, a second electric push rod 10 is symmetrically fixedly installed on the upper end of the support installation platform 9, and the bottom end of the second electric push rod 10 is fixedly connected to the sliding adjustment frame 12, an air pump 13 is fixedly installed on the upper front end of the support installation platform 9, and the air pump 13 is connected to the upper end of the storage tank 11, and a nozzle 14 is evenly fixedly set on the bottom end of the sliding adjustment frame 12.

[0043] When implementing this embodiment, by starting the air pump 13 and opening the valve body at the bottom of the storage tank 11, the clean water stored in the storage tank 11 can be sprayed and discharged from each nozzle 14, so that the filter screen 6 discharged from the first conveying and discharging pipe 5 can be flushed, so that the dust intercepted on the filter screen 6 can be automatically cleaned at a regular time, and the operation can be continuous and stable. Starting the second electric push rod 10 can control the sliding adjustment frame 12 to slide and rise along the inside of the supporting installation platform 9, and control the use height and position of the nozzle 14, so that the filter screen 6 can be flushed efficiently and thoroughly.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A boiler flue gas waste heat cascade utilization device, comprising a second exhaust heat recovery body (1), a fixed installation plate (2), a first exhaust heat recovery body (3) and a third exhaust heat recovery body (4), characterized in that: The fixed mounting plate (2) is fixedly connected to the bottom end of the first exhaust heat recovery body (3), the second exhaust heat recovery body (1) is arranged at the upper end of the first exhaust heat recovery body (3), and the third exhaust heat recovery body (4) is arranged at the upper end of the second exhaust heat recovery body (1).

2. A boiler flue gas waste heat cascade utilization device according to claim 1, characterized in that: The first discharge heat recovery body (3) comprises a first conveying and discharging pipe (5), a filter screen (6), a fixed connection support frame (7) and a first electric push rod (8), wherein the fixed connection support frame (7) is fixedly connected to the side end of the first conveying and discharging pipe (5), the filter screen (6) is slidably engaged in the interior of the first conveying and discharging pipe (5), the first electric push rod (8) is symmetrically fixedly mounted on the fixed connection support frame (7), and the front end of the first electric push rod (8) is fixedly connected to the outer end of the filter screen (6).

3. The boiler flue gas waste heat cascade utilization device according to claim 2, characterized in that: The second discharge heat recovery body (1) comprises a second delivery discharge pipe (15), a first delivery hose (16), a first solenoid valve (17), a sealing connection plate (18) and a drainage frame (19), wherein the drainage frame (19) is fixedly connected to the side end of the second delivery discharge pipe (15), and two drainage frames (19) are staggeredly distributed on the side ends of the second delivery discharge pipe (15), the sealing connection plate (18) is fixedly connected to the outer end of the drainage frame (19) by bolts, a heat collection frame (21) is symmetrically fixedly installed on the inner side of the sealing connection plate (18), the first solenoid valve (17) is symmetrically fixedly installed on the sealing connection plate (18), the first delivery hose (16) is fixedly connected to the outer end of the first solenoid valve (17), and the first delivery hose (16) is connected to the inside of the heat collection frame (21).

4. The boiler flue gas waste heat cascade utilization device according to claim 3, characterized in that: A second solenoid valve (20) is fixedly arranged between the drainage frame (19) and the second conveying and discharging pipe (15); the outside of the drainage frame (19) and the second conveying and discharging pipe (15) are both provided with a thermal insulation layer made of rock wool; and the end of the heat collection frame (21) is inserted into the interior of the second conveying and discharging pipe (15).

5. The boiler flue gas waste heat cascade utilization device according to claim 4, characterized in that: The third waste heat recovery body (4) comprises a first waste heat recovery part (22), a third conveying and discharging pipe (23), a baffle adjustment plate (24), a third electric push rod (25), an adjustment disk (26) and a second waste heat recovery part (27), wherein the adjustment disk (26) is fixedly connected to the bottom end of the third conveying and discharging pipe (23), the baffle adjustment plate (24) is slidably engaged in the inside of the adjustment disk (26), the third electric push rod (25) is fixedly connected to the side end of the adjustment disk (26), and the front end of the third electric push rod (25) is fixedly connected to the side end of the baffle adjustment plate (24), the first waste heat recovery part (22) and the second waste heat recovery part (27) are staggeredly distributed on the side end of the third conveying and discharging pipe (23), and the first waste heat recovery part (22) and the second waste heat recovery part (27) have the same structure.

6. The boiler flue gas waste heat cascade utilization device according to claim 5, characterized in that: The first waste heat recovery part (22) and the second waste heat recovery part (27) both comprise a heat recovery frame (28), a sealed connection card frame (29), a heat recovery plate (30), a heat exchange hole (31), a temperature control valve (32), a connecting pipe (33), a second delivery hose (34), a sealed connection card fixing plate (35), a third solenoid valve (36) and a third delivery hose (37); the sealed connection card frame (29) is fixedly connected to the inner side end of the heat recovery frame (28); the heat recovery plate (30) is evenly fixedly connected to both sides of the sealed connection card frame (29); and the heat recovery plate (30) located on the outer side is arranged on the inner side of the heat recovery frame (28). Inside, the heat exchange holes (31) are evenly penetrated and opened on the heat recovery plate (30), the sealing connection fixing plate (35) is fixedly connected to the outer end of the heat recovery frame (28) by bolts, the third solenoid valve (36) is symmetrically fixedly installed on the upper end of the heat recovery frame (28), the third delivery hose (37) is fixedly connected to the upper end of the third solenoid valve (36), the temperature control valve (32) is fixedly connected to the outer side of the bottom end of the heat recovery frame (28), the connecting pipe (33) is fixedly connected to the outer end of the temperature control valve (32), and the second delivery hose (34) is fixedly connected to the outer end of the connecting pipe (33).

7. The boiler flue gas waste heat cascade utilization device according to claim 6, characterized in that: The sealing connection card frame (29) is fixedly inserted on the third conveying and discharging pipe (23), and the heat recovery plate (30) arranged inside is inserted into the interior of the third conveying and discharging pipe (23).

8. The boiler flue gas waste heat cascade utilization device according to claim 7, characterized in that: The bottom end of the regulating disk (26) is fixedly connected to the upper end of the second conveying and discharging pipe (15), and the bottom end of the second conveying and discharging pipe (15) is fixedly connected to the first conveying and discharging pipe (5).

9. The boiler flue gas waste heat cascade utilization device according to claim 8, characterized in that: The heat recovery plate (30) is made of aluminum.

10. The boiler flue gas waste heat cascade utilization device according to claim 9, characterized in that: A support installation platform (9) is fixedly installed on the upper end of the fixedly connected support frame (7), a sliding adjustment frame (12) is slidably connected to the support installation platform (9), a storage tank (11) is fixedly installed inside the upper end of the sliding adjustment frame (12), a second electric push rod (10) is symmetrically fixedly installed on the upper end of the support installation platform (9), and the bottom end of the second electric push rod (10) is fixedly connected to the sliding adjustment frame (12), an air pump (13) is fixedly installed on the upper front end of the support installation platform (9), and the air pump (13) is connected to the upper end of the storage tank (11), and a nozzle (14) is evenly fixedly arranged at the bottom end of the sliding adjustment frame (12).

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