A boiler flue gas waste heat utilization device

Abstract

The utility model provides a boiler flue gas waste heat utilization device, which belongs to the technical field of waste heat utilization. A boiler flue gas waste heat utilization device is characterized in that it includes a frame, a boiler body and a waste heat recovery box are arranged on the frame, a first smoke exhaust pipe is arranged between the boiler body and the waste heat recovery box, a heat exchange pipe is arranged in the waste heat recovery box, the upper and lower ends of the heat exchange pipe are respectively fixedly connected with a water inlet pipe and a water outlet pipe, a first pipe is arranged at the upper end of the waste heat recovery box, a second pipe is arranged at the lower end of the waste heat recovery box, a valve is arranged on the second pipe, an ultrasonic cleaning machine is arranged in the waste heat recovery box, a filter box is arranged at the lower end of the frame, a filter assembly is arranged in the filter box, the filter box is connected with the second pipe, and a second smoke exhaust pipe is arranged on the filter box. The utility model has an ultrasonic cleaning machine, which cleans the scale and solid particles on the surface of the heat exchange tube, thereby improving the efficiency of waste heat recovery.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas waste heat utilization and relates to a boiler flue gas waste heat utilization device. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The flue gas generated after the fuel in the boiler is burned will carry a large amount of waste heat. The existing waste heat utilization device can achieve the purpose of waste heat recovery by exchanging heat between the flue gas and the water in the heat exchange tube. However, after long-term use, scale will form on the surface of the heat exchange tube, and solid particles in the flue gas will also adhere to the heat exchange tube, reducing the efficiency of waste heat recovery. Summary of the invention

[0003] The purpose of the utility model is to address the above-mentioned problems in the existing technology and propose a boiler flue gas waste heat utilization device to solve the problem that scale will form on the surface of the heat exchange tube after long-term use, and solid particles in the flue gas will also adhere to the heat exchange tube, reducing the efficiency of waste heat recovery.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A boiler flue gas waste heat utilization device, characterized in that it includes a frame, a boiler body and a waste heat recovery box are provided on the frame, a first smoke exhaust pipe is provided between the boiler body and the waste heat recovery box, a heat exchange pipe is provided in the waste heat recovery box, the upper and lower ends of the heat exchange pipe are respectively fixedly connected with a water inlet pipe and a water outlet pipe, a first pipe is provided at the upper end of the waste heat recovery box, a second pipe is provided at the lower end of the waste heat recovery box, a valve is provided on the second pipe, an ultrasonic cleaning machine is provided in the waste heat recovery box, a filter box is provided at the lower end of the frame, a filter assembly is provided in the filter box, the filter box is connected with the second pipe, a second smoke exhaust pipe is provided on the filter box, and an exhaust fan is provided in the second smoke exhaust pipe.

[0006] In the above-mentioned boiler flue gas waste heat utilization device, the filter assembly includes a first cleaning box, a second cleaning box, a first filter screen and a second filter screen. The first cleaning box and the second cleaning box are symmetrically arranged at the upper and lower ends of the filter box. The filter box is symmetrically opened with sliding holes at the upper and lower ends. The sliding holes are connected with the first cleaning box and the second cleaning box. A first sealing block is provided between the first filter screen and the second filter screen. A second sealing block is provided at the upper end of the first filter screen, and a third sealing block is provided at the lower end of the second filter screen. The first filter screen and the second filter screen are slidably connected to the sliding hole. A push rod motor is provided on the second cleaning box. The push rod of the push rod motor is connected to the third sealing block. Fans and vacuum cleaners are provided on both sides of the first cleaning box and the second cleaning box.

[0007] In the above-mentioned boiler flue gas waste heat utilization device, metal fins are provided on the heat exchange tubes.

[0008] In the above-mentioned boiler flue gas waste heat utilization device, temperature sensors are provided on the waste heat recovery box and the heat exchange tubes.

[0009] In the above-mentioned boiler flue gas waste heat utilization device, a heat insulation layer is provided in the waste heat recovery box.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The descaling agent and water are added into the waste heat recovery box from the first pipe, and the ultrasonic cleaning machine is started to clean the scale and solid particles on the surface of the heat exchange tube, which greatly reduces the scale and solid particles on the surface of the heat exchange tube and improves the efficiency of waste heat recovery; the exhaust flue gas is filtered through the filter component. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure,

[0014] 2. Frame; 3. Boiler body; 4. Waste heat recovery box; 5. First smoke exhaust pipe; 6. Heat exchange tube; 7. Water inlet pipe; 8. Water outlet pipe; 9. First pipeline; 10. Second pipeline; 11. Valve; 12. Ultrasonic cleaning machine; 13. Filter box; 14. Second smoke exhaust pipe; 15. First cleaning box; 16. Second cleaning box; 17. First filter; 18. Second filter; 19. First sealing block; 20. Second sealing block; 21. Third sealing block; 22. Fan; 23. Vacuum cleaner; 24. Metal fins; 25. Insulation layer. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] like Figure 1 As shown,

[0017] A boiler flue gas waste heat utilization device, characterized in that it includes a frame 2, a boiler body 3 and a waste heat recovery box 4 are provided on the frame 2, a first smoke exhaust pipe 5 is provided between the boiler body 3 and the waste heat recovery box 4, a heat exchange pipe 6 is provided in the waste heat recovery box 4, and the upper and lower ends of the heat exchange pipe 6 are respectively fixedly connected to a water inlet pipe 7 and a water outlet pipe 8, a first pipe 9 is provided at the upper end of the waste heat recovery box 4, a second pipe 10 is provided at the lower end of the waste heat recovery box 4, a valve 11 is provided on the second pipe 10, an ultrasonic cleaning machine 12 is provided in the waste heat recovery box 4, a filter box 13 is provided at the lower end of the frame 2, a filter assembly is provided in the filter box 13, the filter box 13 is connected to the second pipe 10, a second smoke exhaust pipe 14 is provided on the filter box 13, and an exhaust fan is provided in the second smoke exhaust pipe 14.

[0018] In this embodiment, the flue gas generated by the boiler body 3 enters the waste heat recovery box 4 through the first flue gas exhaust pipe 5, and water is added to the heat exchange tube 6 through the water inlet pipe 7. The high-temperature flue gas contacts the heat exchange tube 6 for heat exchange. After the heat of the flue gas is absorbed by the water, the water is discharged from the water outlet pipe 8 for use. At this time, the temperature of the flue gas is reduced, and the valve 11 is opened. The flue gas passes through the second pipe 10 and enters the filter box 13. After the filter component filters the flue gas, the exhaust fan discharges the filtered flue gas from the second flue gas exhaust pipe 14. After the flue gas of the boiler is heat exchanged, the valve 11 is closed, and the descaling agent and water are added from the first pipe 9 to the waste heat recovery box 4. The ultrasonic cleaning machine 12 is started to clean the scale and solid particles on the surface of the heat exchange tube 6, which greatly reduces the scale and solid particles on the surface of the heat exchange tube 6 and improves the efficiency of waste heat recovery. After the cleaning is completed, the valve 11 is opened to discharge the sewage from the second pipe 10.

[0019] In this embodiment, the filter assembly includes a first cleaning box 15, a second cleaning box 16, a first filter 17 and a second filter 18. The first cleaning box 15 and the second cleaning box 16 are symmetrically arranged at the upper and lower ends of the filter box 13. The filter box 13 is symmetrically provided with sliding holes at the upper and lower ends. The sliding holes are connected to the first cleaning box 15 and the second cleaning box 16. A first sealing block 19 is provided between the first filter 17 and the second filter 18. A second sealing block 20 is provided at the upper end of the first filter 17, and a third sealing block 21 is provided at the lower end of the second filter 18. The first filter 17 and the second filter 18 are slidably connected to the sliding hole. A push rod motor is provided on the second cleaning box 16. The push rod of the push rod motor is connected to the third sealing block 21. Fans 22 and vacuum cleaners 23 are provided on both sides of the first cleaning box 15 and the second cleaning box 16. The flue gas after heat exchange enters the filter box 13 from the second pipe 10, and the flue gas is discharged after being filtered by the first filter 17. After the first filter 17 has been used for a period of time, the push rod motor drives the first filter 17 to move to the first cleaning box 15, and is filtered by the second filter 18. The first sealing block 19 and the third sealing block 21 seal the sliding hole, and the fan 22 blows the dust particles intercepted on the surface of the filter and absorbs them through the vacuum cleaner 23. After the second filter 18 has been used for a period of time, it returns to the second cleaning box 16 for cleaning, and the first sealing block 19 and the second sealing block 20 seal the sliding hole. The first filter 17 and the second filter 18 filter alternately and perform self-cleaning, thereby ensuring the filtering effect of the filter assembly.

[0020] In this embodiment, the heat exchange tube 6 is provided with metal fins 24. The heat exchange tube 6 is provided with metal fins 24 to increase the heat exchange area and improve the heat exchange efficiency.

[0021] In this embodiment, temperature sensors are provided on the waste heat recovery box 4 and the heat exchange tube 6. The temperature of the water in the heat exchange tube 6 and the temperature of the flue gas in the waste heat recovery box 4 are detected by the temperature sensors.

[0022] In this embodiment, a heat insulation layer 25 is provided in the waste heat recovery box 4 .

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0026] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A boiler flue gas waste heat utilization device, characterized in that: The invention comprises a frame (2), wherein a boiler body (3) and a waste heat recovery box (4) are provided on the frame (2), a first smoke exhaust pipe (5) is provided between the boiler body (3) and the waste heat recovery box (4), a heat exchange pipe (6) is provided in the waste heat recovery box (4), the upper end and the lower end of the heat exchange pipe (6) are respectively fixedly connected with a water inlet pipe (7) and a water outlet pipe (8), a first pipe (9) is provided at the upper end of the waste heat recovery box (4), a second pipe (10) is provided at the lower end of the waste heat recovery box (4), a valve (11) is provided on the second pipe (10), an ultrasonic cleaning machine (12) is provided in the waste heat recovery box (4), a filter box (13) is provided at the lower end of the frame (2), a filter assembly is provided in the filter box (13), the filter box (13) is connected with the second pipe (10), a second smoke exhaust pipe (14) is provided on the filter box (13), and an exhaust fan is provided in the second smoke exhaust pipe (14).

2. The boiler flue gas waste heat utilization device according to claim 1, characterized in that: The filter assembly comprises a first cleaning box (15), a second cleaning box (16), a first filter screen (17) and a second filter screen (18). The first cleaning box (15) and the second cleaning box (16) are symmetrically arranged at the upper and lower ends of the filter box (13). The filter box (13) is symmetrically provided with sliding holes at the upper and lower ends. The sliding holes are connected with the first cleaning box (15) and the second cleaning box (16). A first sealing block (19) is provided between the first filter screen (17) and the second filter screen (18). A second sealing block (20) is provided at the upper end of the first filter screen (17). A third sealing block (21) is provided at the lower end of the second filter screen (18). The first filter screen (17) and the second filter screen (18) are slidably connected to the sliding hole. A push rod motor is provided on the second cleaning box (16). The push rod of the push rod motor is connected to the third sealing block (21). A fan (22) and a dust collector (23) are provided on both sides of the first cleaning box (15) and the second cleaning box (16).

3. The boiler flue gas waste heat utilization device according to claim 1, characterized in that: The heat exchange tube (6) is provided with a metal fin (24).

4. The boiler flue gas waste heat utilization device according to claim 1, characterized in that: The waste heat recovery box (4) and the heat exchange tube (6) are both provided with temperature sensors.

5. The boiler flue gas waste heat utilization device according to claim 1, characterized in that: A heat insulation layer (25) is provided inside the waste heat recovery box (4).

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