Boiler tail flue gas waste heat recovery device

Abstract

The utility model relates to the technical field of flue gas waste heat recovery equipment, in particular to a boiler tail flue gas waste heat recovery device, which comprises a filter box, a filter assembly, a gas inlet pipe, a transmission pipe, a gas inlet pipe, a gas outlet pipe and a gas outlet pipe, according to the utility model, the filter assembly is arranged, so that impurities such as dust in flue gas can be filtered by the filter screen, and the phenomenon that the impurities in the flue gas are attached to the peripheral side of the heat exchange tube to influence the heat exchange effect of the heat exchange tube is avoided; and meanwhile, personnel can conveniently clean and replace the filter screen, the situation that dust is accumulated on the filter screen to affect the filtering effect is avoided, heat exchange is conducted between flue gas and the heat exchange pipes and the heat exchange pieces through the heat exchange assembly, at the moment, the temperature of the flue gas is reduced, the temperature of water in the heat exchange pipes is increased, boiler flue gas waste heat recovery is achieved, and energy waste is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas waste heat recovery equipment, in particular to a boiler tail flue gas waste heat recovery device. Background Art

[0002] A boiler is an energy conversion device. The hot water or steam generated in the boiler can directly provide the required thermal energy for industrial production and people's lives, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator.

[0003] In the prior art, Chinese Patent Publication No. CN204114893U discloses a boiler flue gas waste heat recovery and utilization device, including a boiler tail flue, a multi-stage air preheater, a smoke exhaust channel, a dust collector, and a chimney. A separate heat pipe heat exchanger is provided at the tail end of the boiler tail flue, and a flue gas deep cooler is provided after the dust collector. The boiler flue gas waste heat recovery and utilization device of the utility model can recover low-grade flue gas waste heat, has a high recovery and utilization efficiency, and effectively reduces the energy consumption of the steam boiler.

[0004] When the existing boiler is working, the fuel burned will produce a large amount of high-temperature flue gas. Therefore, a flue gas recovery device is needed to recover it, make full use of the flue gas waste heat and avoid resource waste. However, some existing flue gas recovery devices are not equipped with filtering components. When the high-temperature flue gas exchanges heat with the heat exchange tube, the dust in the flue gas is easy to adhere to the surrounding side of the heat exchange tube. Long-term accumulation is easy to affect the heat exchange effect of the heat exchange tube. Based on this, we propose a flue gas waste heat recovery device at the tail of the boiler. Utility Model Content

[0005] The purpose of the utility model is to provide a boiler tail flue gas waste heat recovery device to solve the problem proposed in the above background technology that some existing flue gas recovery devices are not equipped with filtering components, and dust in the flue gas is easy to adhere to the surrounding side of the heat exchange tube when the high-temperature flue gas exchanges heat with the heat exchange tube, and long-term accumulation is easy to affect the heat exchange effect of the heat exchange tube.

[0006] The technical solution of the utility model is: a boiler tail flue gas waste heat recovery device, comprising a filter box, one side of the filter box is fixedly connected to an air intake pipe connected thereto, and the side of the filter box away from the air intake pipe is fixedly connected to a transmission pipe connected thereto, and further comprising;

[0007] A filter assembly, wherein the filter assembly is located in the filter box;

[0008] A heat exchange component is located on one side of the filter box.

[0009] Preferably, the filter assembly includes three groups of symmetrical slide grooves, the slide grooves are provided on the inner wall of the filter box, a slider is slidably connected in the slide groove, the same installation frame is fixedly connected between two corresponding sliders, a baffle is fixedly connected to the inner wall of the installation frame, a filter screen is arranged on the inner wall of the installation frame, one side of the filter screen is abutted against the side wall of the baffle, symmetrical make way grooves are provided on the inner wall of the installation frame, a number of placement holes arranged at equal intervals are provided in the make way grooves, compression springs are fixedly connected in the placement holes, the other ends of the several compression springs located on the same side are fixedly connected with blocks, and the side of the block close to the filter screen abuts against the side wall of the filter screen.

[0010] Preferably, a connecting column is fixedly connected to the top surface of the installation frame, a handle is fixedly connected to the top surface of the connecting column, and a symmetrically arranged plug column is fixedly connected to the bottom surface of the handle. A plurality of slots arranged at equal intervals are provided on the top surface of the filter box, and the connecting column is snap-fitted into the corresponding slots. A plurality of sockets are provided on the top surface of the filter box, and the plug columns are plugged into the corresponding sockets.

[0011] Preferably, the heat exchange assembly includes a heat exchange tank, which is located on one side of the filter box, the heat exchange tank is fixedly connected to the transmission pipe, the heat exchange tank is communicated with the transmission pipe, a heat exchange pipe is arranged in the heat exchange tank, a heat exchange plate is fixedly connected to the inner wall of the heat exchange tank, the heat exchange plate is located between the heat exchange pipes, the heat exchange plate is fixedly connected to the heat exchange pipes, one end of the heat exchange pipe is fixedly connected to a water inlet valve connected thereto, and the other end of the heat exchange pipe is fixedly connected to a drain valve connected thereto.

[0012] Preferably, the three filter screens have the same thickness, and the filter holes of the three filter screens decrease sequentially from left to right.

[0013] Preferably, the size of the connecting column matches that of the slot, and the side wall of the connecting column abuts against the inner wall of the slot.

[0014] The utility model provides a boiler tail flue gas waste heat recovery device through improvement, which has the following improvements and advantages compared with the prior art:

[0015] The utility model provides a filter assembly so that the filter can filter impurities such as dust in the flue gas, thereby preventing impurities in the smoke from adhering to the surrounding sides of the heat exchange tubes and affecting the heat exchange effect of the heat exchange tubes. At the same time, it is convenient for personnel to clean and replace the filter, thereby preventing dust accumulation on the filter and affecting the filtering effect. By providing a heat exchange assembly, the flue gas can exchange heat with the heat exchange tubes and heat exchange plates. At this time, the temperature of the flue gas drops and the temperature of the water in the heat exchange tubes rises, thereby realizing the recovery of waste heat from the boiler flue gas and avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the filter box area of ​​the utility model;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the filter box of the utility model;

[0020] Figure 4 It is a schematic diagram of the exploded structure of the installation frame area of ​​the utility model;

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of the installation frame of the utility model;

[0022] Figure 6 It is a schematic diagram of the cross-sectional structure of the heat exchange tank area of ​​the utility model.

[0023] Description of reference numerals:

[0024] 1. Filter box; 2. Inlet pipe; 3. Transmission pipe; 4. Slide; 5. Slider; 6. Installation frame; 7. Baffle; 8. Filter; 9. Make way slot; 10. Placement hole; 11. Compression spring; 12. Block; 13. Slot; 14. Socket; 15. Connecting column; 16. Handle; 17. Plug column; 18. Heat exchange tank; 19. Heat exchange tube; 20. Heat exchange plate; 21. Water inlet valve; 22. Drain valve; 23. Exhaust pipe. DETAILED DESCRIPTION

[0025] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1 - Figure 6 As shown, a boiler tail flue gas waste heat recovery device includes a filter box 1, one side of the filter box 1 is fixedly connected to an air intake pipe 2 connected thereto, and the side of the filter box 1 away from the air intake pipe 2 is fixedly connected to a transmission pipe 3 connected thereto, and further includes;

[0027] A filter assembly, the filter assembly is located in the filter box 1;

[0028] Heat exchange component, the heat exchange component is located on one side of the filter box 1.

[0029] Furthermore, the filter assembly includes three groups of symmetrical slide grooves 4, which are provided on the inner wall of the filter box 1, and a slider 5 is slidably connected in the slide groove 4, and the same mounting frame 6 is fixedly connected between two corresponding sliders 5, and a baffle 7 is fixedly connected to the inner wall of the mounting frame 6, and a filter screen 8 is arranged on the inner wall of the mounting frame 6, and one side of the filter screen 8 is against the side wall of the baffle 7, and a symmetrical make way groove 9 is provided on the inner wall of the mounting frame 6, and a plurality of placement holes 10 arranged at equal intervals are provided in the make way groove 9, and a compression spring 11 is fixedly connected in the placement hole 10, and the other ends of the plurality of compression springs 11 located on the same side are fixedly connected with a block 12, and the side of the block 12 close to the filter screen 8 is against the side wall of the filter screen 8.

[0030] Furthermore, a connecting column 15 is fixedly connected to the top surface of the mounting frame 6, a handle 16 is fixedly connected to the top surface of the connecting column 15, and a symmetrically arranged plug column 17 is fixedly connected to the bottom surface of the handle 16. A plurality of slots 13 arranged at equal intervals are provided on the top surface of the filter box 1, and the connecting column 15 is snap-fitted into the corresponding slots 13. A plurality of sockets 14 are provided on the top surface of the filter box 1, and the plug columns 17 are plugged into the corresponding sockets 14.

[0031] Furthermore, the heat exchange assembly includes a heat exchange tank 18, which is located on one side of the filter box 1, and is fixedly connected to the transmission pipe 3. The heat exchange tank 18 is communicated with the transmission pipe 3, and a heat exchange pipe 19 is arranged in the heat exchange tank 18. A heat exchange plate 20 is fixedly connected to the inner wall of the heat exchange tank 18, and the heat exchange plate 20 is located between the heat exchange pipes 19. The heat exchange plate 20 is fixedly connected to the heat exchange pipes 19, and one end of the heat exchange pipe 19 is fixedly connected to a water inlet valve 21 connected thereto, and the other end of the heat exchange pipe 19 is fixedly connected to a drain valve 22 connected thereto.

[0032] Furthermore, the three filter screens 8 have the same thickness, and the filter holes of the three filter screens 8 decrease from left to right, so as to fully filter the dust in the flue gas.

[0033] Furthermore, the size of the connecting column 15 matches that of the slot 13 , and the side wall of the connecting column 15 abuts against the inner wall of the slot 13 , thereby preventing smoke from leaking from the connection between the connecting column 15 and the slot 13 .

[0034] Working principle: When the device recycles the high-temperature flue gas generated by the boiler, the personnel first open the water inlet valve 21 to inject water into the heat exchange tube 19. At this time, the flue gas first enters the filter box 1 through the air inlet pipe 2, and then passes through the three filter screens 8 from left to right. At this time, the dust and impurities in the high-temperature flue gas are filtered on the filter screen 8. The filtered high-temperature flue gas then enters the heat exchange tank 18 from the transmission pipe 3. The high-temperature flue gas exchanges heat with the heat exchange tube 19 and the heat exchange plate 20. Since the heat exchange area of ​​the heat exchange plate 20 is large, the heat exchange effect between the heat exchange tube 19 and the high-temperature flue gas can be increased. At this time, the temperature of the flue gas drops, and the heat exchange tube 19 is filled with water. The temperature of the water rises to recover the waste heat of the boiler flue gas. At this time, the flue gas is discharged from the exhaust pipe 23. When the waste heat of the flue gas is completely recovered and discharged, the personnel wait for the filter screen 8 to cool down. When the filter screen 8 is completely cooled down, the personnel lifts up the handle 16, and the handle 16 drives the installation frame 6 to move upward through the connecting column 15. At this time, the slider 5 moves upward in the slide groove 4 until the slider 5 is completely moved out of the slide groove 4. At this time, the installation frame 6 is moved out of the filter box 1, and the personnel moves the block 12 in the direction close to the compression spring 11, so that the compression spring 11 is squeezed. At this time, the compression spring 11 completely enters the corresponding placement hole 10, and the block 12 enters the corresponding giving way groove 9. At this time, the side wall of the stopper 12 does not abut the side wall of the filter screen 8. At this time, the personnel pushes the filter screen 8 away from one side of the stopper 12, so that the filter screen 8 falls off the installation frame 6. At this time, the personnel can clean and replace the filter screen 8. At this time, the compression spring 11 rebounds and drives the stopper 12 to move out of the giving way groove 9. When the personnel has finished cleaning the filter screen 8, the personnel moves the stopper 12 in the direction close to the compression spring 11, so that the compression spring 11 is squeezed. At this time, the compression spring 11 completely enters the corresponding placement hole 10, and the stopper 12 enters the corresponding giving way groove 9. At this time, the personnel The filter screen 8 is placed in the installation frame 6 and one side of the filter screen 8 is against the side wall of the baffle 7. At this time, the personnel releases the block 12, and the compression spring 11 rebounds and drives the block 12 to move out of the clearance groove 9. At this time, the side wall of the block 12 is against the side wall of the filter screen 8, thereby limiting it. After the personnel installs the filter screen 8, the personnel puts the installation frame 6 into the filter box 1 from the corresponding slot 13. At this time, the slider 5 moves downward in the slide groove 4 until the bottom surface of the installation frame 6 is against the bottom surface of the filter box 1. At this time, the side wall of the connecting column 15 is against the inner wall of the slot 13, and the plug column 17 enters the corresponding socket 14.

[0035] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A boiler tail flue gas waste heat recovery device, comprising a filter box (1), characterized in that: One side of the filter box (1) is fixedly connected to an air intake pipe (2) in communication therewith, and the side of the filter box (1) away from the air intake pipe (2) is fixedly connected to a transmission pipe (3) in communication therewith, and further comprises: A filter assembly, wherein the filter assembly is located in the filter box (1); A heat exchange component, the heat exchange component being located on one side of the filter box (1); The filter assembly comprises three groups of symmetrical slide grooves (4), wherein the slide grooves (4) are provided on the inner wall of the filter box (1), a slider (5) is slidably connected in the slide grooves (4), a same mounting frame (6) is fixedly connected between two corresponding sliders (5), a retaining bar (7) is fixedly connected to the inner wall of the mounting frame (6), a filter screen (8) is arranged on the inner wall of the mounting frame (6), one side of the filter screen (8) abuts against the side wall of the retaining bar (7), a symmetrical clearance groove (9) is provided on the inner wall of the mounting frame (6), a plurality of placement holes (10) arranged at equal intervals are provided in the clearance grooves (9), a compression spring (11) is fixedly connected in the placement holes (10), the other ends of the plurality of compression springs (11) located on the same side are fixedly connected to a retaining block (12), and the side of the retaining block (12) close to the filter screen (8) abuts against the side wall of the filter screen (8).

2. A boiler tail flue gas waste heat recovery device according to claim 1, characterized in that: The top surface of the installation frame (6) is fixedly connected to a connecting column (15), the top surface of the connecting column (15) is fixedly connected to a handle (16), the bottom surface of the handle (16) is fixedly connected to symmetrically arranged plug columns (17), the top surface of the filter box (1) is provided with a plurality of slots (13) arranged at equal intervals, the connecting column (15) is snap-fitted with the corresponding slots (13), the top surface of the filter box (1) is provided with a plurality of insertion holes (14), the plug columns (17) are inserted into the corresponding insertion holes (14).

3. The boiler tail flue gas waste heat recovery device according to claim 1, characterized in that: The heat exchange assembly comprises a heat exchange tank (18), the heat exchange tank (18) being located at one side of the filter box (1), the heat exchange tank (18) being fixedly connected to the transmission pipe (3), the heat exchange tank (18) being communicated with the transmission pipe (3), a heat exchange pipe (19) being arranged in the heat exchange tank (18), a heat exchange plate (20) being fixedly connected to the inner wall of the heat exchange tank (18), the heat exchange plate (20) being located between the heat exchange pipes (19), the heat exchange plate (20) being fixedly connected to the heat exchange pipes (19), one end of the heat exchange pipe (19) being fixedly connected to a water inlet valve (21) being communicated with the heat exchange pipe (19), and the other end of the heat exchange pipe (19) being fixedly connected to a water discharge valve (22) being communicated with the heat exchange pipe (19).

4. The boiler tail flue gas waste heat recovery device according to claim 1, characterized in that: The three filter screens (8) have the same thickness, and the filter holes of the three filter screens (8) decrease in size from left to right.

5. The boiler tail flue gas waste heat recovery device according to claim 2, characterized in that: The size of the connecting column (15) matches that of the slot (13), and the side wall of the connecting column (15) abuts against the inner wall of the slot (13).

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