Coal coking flue gas waste heat recovery treatment device

Abstract

The utility model relates to the technical field of coal coking flue gas waste heat recovery, and disclose a kind of coal coking flue gas waste heat recovery treatment device, including main body structure, the main body structure includes smoke recovery tank, drain groove and limit sliding seat;Waste heat recovery structure, the waste heat recovery structure includes fixed frame, flue gas heat exchanger, limit sliding block, moving wheel and magnetic attraction piece;Fixed structure, the fixed structure includes mounting seat, fixed stop block and compression spring.The utility model can promote fixed stop block by the self elastic force of compression spring, so that it is attached with the outer surface of the front end of fixed frame, at this time, waste heat recovery structure can be integrally fixed in the inside of smoke recovery tank, pulling plate can drive fixed stop block to separate from the outer surface of the front end of fixed frame, at this time, pulling fixed frame can be integrally extracted from the inside of smoke recovery tank to outside, the design makes that operating personnel can more conveniently maintain and overhaul waste heat recovery structure.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology of coal coking flue gas, and more specifically, to a waste heat recovery treatment device for coal coking flue gas. Background Technology

[0002] In the current coal coking production process, coal undergoes high-temperature dry distillation for coking, while auxiliary fuels are burned to maintain the production temperature. This process generates a large amount of high-heat flue gas. If this high-heat flue gas is directly emitted without treatment, it will not only exacerbate air pollution due to the harmful components such as dust and sulfides contained in the flue gas, causing serious adverse effects on human health and the regional ecological environment, but it will also waste a large amount of valuable waste heat contained in the flue gas, resulting in significant heat energy loss. This is inconsistent with the current concepts of green, low-carbon, circular economy and sustainable development. Therefore, it is necessary to use specialized recovery and treatment devices to recover and purify the waste heat of coal coking flue gas.

[0003] Some existing devices lack a structure for flushing heat exchangers, and the flue gas contains a large amount of dust, which accumulates on the surface of the heat exchanger during treatment, forming a heat-insulating ash layer, causing a rapid decrease in heat exchange efficiency. Furthermore, the heat exchangers in some existing devices are mostly fixed inside the tank, making it inconvenient for operators to maintain and repair them. Therefore, this utility model provides a waste heat recovery treatment device for coal coking flue gas to solve the above problems. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a waste heat recovery treatment device for coal coking flue gas, which has the advantages of flushing the heat exchanger to ensure heat exchange efficiency and facilitating the maintenance and repair of the heat exchanger.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery and treatment device for coal coking flue gas, comprising: a main structure, wherein the main structure includes a flue gas recovery box, a drainage trough and a limiting slide, and the drainage trough is provided in two sets; The waste heat recovery structure includes a fixed frame, a flue gas heat exchanger, a limiting slider, a moving wheel and a magnetic block. The moving wheel and the magnetic block are each provided in two sets. The limiting slider is slidably inserted into the inside of the limiting slide seat. A fixed structure, comprising a mounting base, a fixing block, and a compression spring, wherein the mounting base is fixedly connected to the outer surface of the front end of the flue gas recovery box; The flushing structure includes a mounting bracket, a cylinder, a connecting pipe, a flushing pipe, and a liquid pump. The flushing pipe is provided in two sets, and the mounting bracket is fixedly connected to the upper surface of the flue gas recovery box.

[0006] As a preferred technical solution of this utility model, both ends of the flue gas recovery box are connected to flue gas channels, and a drainage base is fixedly connected to the lower surface of the flue gas recovery box. Two sets of drainage grooves are respectively opened inside the lower surface of the flue gas recovery box on both sides, and the interior of the drainage base is connected to the interior of the two sets of drainage grooves.

[0007] As a preferred technical solution of this utility model, the limiting slide is fixedly connected to the middle position of the lower inner surface of the flue gas recovery box, the outer surface of the fixing frame slides and fits against the inner surface of the front end of the flue gas recovery box, and the outer surface of the front end of the fixing frame is flush with the outer surface of the front end of the flue gas recovery box.

[0008] As a preferred embodiment of this utility model, the flue gas heat exchanger is fixedly connected to the inside of the fixed frame, and the inside of both ends of the flue gas heat exchanger is respectively connected to an inlet pipe and an outlet pipe.

[0009] As a preferred technical solution of this utility model, the limiting slider is fixedly connected to the middle position of the lower surface of the fixed frame, the two sets of moving wheels are respectively installed on both sides of the lower surface of the fixed frame, and the outer surface of the lower end of the two sets of moving wheels rolls and fits against the lower surface inside the flue gas recovery box. The two sets of magnetic blocks are respectively fixedly connected to the outer surfaces of the rear ends of the fixed frame, and the magnetic blocks can fit against the surfaces of the front and rear ends inside the flue gas recovery box.

[0010] As a preferred technical solution of this utility model, a pull plate is slidably inserted into the interior of the front surface of the mounting base, and the fixing block is slidably inserted into the interior of the mounting base near the fixing frame. The rear end of the pull plate is fixedly connected to the front end of the fixing block, and the surface of the rear end of the fixing block is in contact with the outer surface of the front end of the fixing frame. A compression spring is provided inside the mounting base, and one end of the compression spring is fixedly connected to the end of the fixing block away from the fixing frame. The other end of the compression spring elastically abuts against the inner surface of the mounting base.

[0011] As a preferred technical solution of this utility model, the cylinder is installed on one side of the upper end of the mounting bracket, the lower end of the push rod inside the cylinder is fixedly connected to a fixed seat, the outer surface of the middle position of the connecting pipe is fixedly connected to the inner wall of the fixed seat, and limit strips are fixedly connected to the outer surfaces of both ends of the connecting pipe. The connecting pipe and the two sets of limit strips are slidably inserted into the interior of both ends of the upper surface of the flue gas recovery box.

[0012] As a preferred technical solution of this utility model, the two sets of flushing pipes are connected to the lower end of the connecting pipe. The two sets of flushing pipes are equipped with multiple sets of nozzles, and the positions of the two sets of nozzles correspond to the positions of the flue gas heat exchanger. The liquid pump is installed on the upper surface of the flue gas recovery box. The liquid pump is inserted into the fixed base through a connecting hose and is connected to the inside of the connecting pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model uses the elastic force of the compression spring to push the fixed stop block to fit against the outer surface of the front end of the fixed frame. At this time, the waste heat recovery structure can be fixed inside the flue gas recovery box. Pulling the pull plate can cause the fixed stop block to detach from the outer surface of the front end of the fixed frame. At this time, pulling the fixed frame can pull the waste heat recovery structure out of the flue gas recovery box. This design makes it easier for operators to maintain and repair the waste heat recovery structure.

[0014] 2. This utility model uses a liquid pump to draw cleaning liquid and deliver it to the inside of the connecting pipe through a connecting hose. Then, the nozzles of two sets of flushing pipes are used to flush the outer surfaces of both sides of the flue gas heat exchanger. The starting cylinder can push the fixed seat to move the connecting pipe and the two sets of flushing pipes downwards synchronously, which can increase the flushing range and thus improve the flushing effect. This design can prevent the formation of heat insulation ash layer on the outer surface of the flue gas heat exchanger, thereby ensuring the heat exchange efficiency of the flue gas heat exchanger. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic cross-sectional view of the structure of this utility model; Figure 3 This is a schematic diagram of the waste heat recovery structure of this utility model in use. Figure 4 This is an exploded view of the fixed structure of this utility model; Figure 5 This is a schematic diagram of the flushing structure of this utility model.

[0016] In the diagram: 1. Main structure; 11. Flue gas recovery box; 12. Flue gas passage; 13. Drainage base; 14. Drainage trough; 15. Limiting slide; 2. Waste heat recovery structure; 21. Fixing frame; 22. Flue gas heat exchanger; 23. Water inlet pipe; 24. Water outlet pipe; 25. Limiting slider; 26. Moving wheel; 27. Magnetic block; 3. Fixing structure; 31. Mounting base; 32. Pull plate; 33. Fixing block; 34. Compression spring; 4. Flushing structure; 41. Mounting bracket; 42. Cylinder; 43. Fixing base; 44. Connecting pipe; 45. Limiting strip; 46. Flushing pipe; 47. Liquid pump. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1 to 5 As shown, this utility model provides a waste heat recovery treatment device for coal coking flue gas, including: a main structure 1, the main structure 1 including a flue gas recovery box 11, a drainage trough 14 and a limiting slide 15, and the drainage trough 14 is provided with two sets; Waste heat recovery structure 2 includes a fixed frame 21, a flue gas heat exchanger 22, a limiting slider 25, a moving wheel 26 and a magnetic block 27. The moving wheel 26 and the magnetic block 27 are each provided in two sets. The limiting slider 25 is slidably inserted into the inside of the limiting slide block 15. The fixing structure 3 includes a mounting base 31, a fixing block 33 and a compression spring 34. The mounting base 31 is fixedly connected to the outer surface of the front end of the flue gas recovery box 11. The flushing structure 4 includes a mounting bracket 41, a cylinder 42, a connecting pipe 44, a flushing pipe 46, and a liquid pump 47. The flushing pipe 46 is provided in two sets, and the mounting bracket 41 is fixedly connected to the upper surface of the flue gas recovery box 11.

[0019] The flue gas recovery box 11 has flue gas channels 12 connected to both ends. A drainage base 13 is fixedly connected to the lower surface of the flue gas recovery box 11. Two sets of drainage channels 14 are respectively opened inside the lower surface of the flue gas recovery box 11 on both sides. The interior of the drainage base 13 is connected to the interior of the two sets of drainage channels 14.

[0020] Two sets of drainage channels 14 can guide the flushed wastewater into the interior of the drainage base 13. The interior of the drainage base 13 is a concave funnel shape, and a drainage pipe is provided at the lower end, so that the flushed wastewater can be discharged to a designated location to avoid the wastewater from polluting the ground.

[0021] The limiting slide 15 is fixedly connected to the middle position of the lower inner surface of the flue gas recovery box 11, the outer surface of the fixing frame 21 slides and fits against the inner surface of the front end of the flue gas recovery box 11, and the outer surface of the front end of the fixing frame 21 is flush with the outer surface of the front end of the flue gas recovery box 11.

[0022] A handle is provided on the outer surface of the front end of the flue gas heat exchanger 22, which makes it easier for the operator to pull the waste heat recovery structure 2 as a whole. When the outer surface of the rear end of the fixing frame 21 is in contact with the inner rear end surface of the flue gas recovery box 11, the outer surface of the front end of the fixing frame 21 will be flush with the outer surface of the front end of the flue gas recovery box 11. At this time, gaps can be avoided between the fixing frame 21 and the inner surface of the front end of the flue gas recovery box 11, thereby reducing the leakage of flue gas.

[0023] The flue gas heat exchanger 22 is fixedly connected to the inside of the fixed frame 21, and the inside of the two ends of the flue gas heat exchanger 22 is respectively connected to the water inlet pipe 23 and the water outlet pipe 24.

[0024] Cold water can be introduced into the flue gas heat exchanger 22 through the water inlet pipe 23. The flue gas heat exchanger 22 is a single-pass finned tube heat exchanger with fins made of stainless steel 304, fin spacing of 10mm, and a total heat exchange area of ​​≥5㎡. When the flue gas passes through the flue gas heat exchanger 22, the cold water absorbs heat to cool the flue gas. At the same time, the cold water is heated by the flue gas and then discharged to the collection container through the water outlet pipe 24.

[0025] The limiting slider 25 is fixedly connected to the middle position of the lower surface of the fixed frame 21. Two sets of moving wheels 26 are respectively installed on both sides of the lower surface of the fixed frame 21, and the outer surface of the lower end of the two sets of moving wheels 26 rolls and fits against the lower surface inside the flue gas recovery box 11. Two sets of magnetic blocks 27 are respectively fixedly connected to the outer surfaces of the rear ends of the fixed frame 21, and the magnetic blocks 27 can fit against the surfaces of the front and rear ends inside the flue gas recovery box 11.

[0026] The sliding connection between the limiting slider 25 and the limiting slide block 15 improves the stability of the waste heat recovery structure 2 during movement, preventing wobbling. The two sets of moving wheels 26 reduce friction between the fixed frame 21 and the flue gas recovery box 11, thus reducing resistance. The moving wheels 26 are made of high-temperature resistant polytetrafluoroethylene, with built-in high-temperature grease in the hubs, adapting to the internal working temperature of 80-150℃ in the flue gas recovery box 11, and have a service life of ≥6 months. Two sets of magnetic blocks 27... The setting can limit the movement distance of the fixed frame 21, preventing the fixed frame 21 from leaving the interior of the flue gas recovery box 11 when it moves. In addition, the magnetic block 27 can be attracted to the front and rear surfaces of the interior of the flue gas recovery box 11 by its own magnetic force, which can limit the overall position of the waste heat recovery structure 2 and minimize the movement of the waste heat recovery structure 2 during use or maintenance. The magnetic block 27 is made of high temperature resistant neodymium iron boron material with a magnetic strength of 60N-70N and a temperature resistance of ≤200℃, ensuring that it will not fail in the high temperature environment inside the flue gas recovery box 11.

[0027] The mounting base 31 has a pull plate 32 slidably inserted inside the front surface of the mounting base 31, and a fixing block 33 slidably inserted inside the mounting base 31 near the fixing frame 21. The rear end of the pull plate 32 is fixedly connected to the front end of the fixing block 33. The rear surface of the fixing block 33 is in contact with the outer surface of the front end of the fixing frame 21. The mounting base 31 has a compression spring 34 inside, and one end of the compression spring 34 is fixedly connected to the end of the fixing block 33 away from the fixing frame 21. The other end of the compression spring 34 elastically abuts against the inner surface of the mounting base 31.

[0028] The compression spring 34 can push the fixed block 33 to fit against the outer surface of the front end of the fixed frame 21. At this time, the waste heat recovery structure 2 can be fixed inside the flue gas recovery box 11, and the fixed block 33 can be prevented from detaching from the outer surface of the front end of the fixed frame 21. Pulling the pull plate 32 can cause the fixed block 33 to detach from the outer surface of the front end of the fixed frame 21. At this time, pulling the fixed frame 21 can pull the waste heat recovery structure 2 out of the flue gas recovery box 11 for maintenance.

[0029] The cylinder 42 is installed on one side of the upper end of the mounting bracket 41. The lower end of the push rod inside the cylinder 42 is fixedly connected to the fixed seat 43. The outer surface of the middle position of the connecting pipe 44 is fixedly connected to the inner wall of the fixed seat 43. Limiting strips 45 are fixedly connected to the outer surfaces of both ends of the connecting pipe 44. The connecting pipe 44 and the two sets of limiting strips 45 are slidably inserted into the interior of both ends of the upper surface of the flue gas recovery box 11.

[0030] By activating the cylinder 42, the fixed seat 43 can be pushed to move the connecting pipe 44 and the two sets of flushing pipes 46 downwards in sync, which can increase the range of flushing. Furthermore, the setting of two sets of limit bars 45 can improve the stability of the connecting pipe 44 and the two sets of flushing pipes 46 during movement.

[0031] Among them, the two sets of flushing pipes 46 are connected to the lower end of the connecting pipe 44. The two sets of flushing pipes 46 are equipped with multiple sets of nozzles, and the positions of the two sets of nozzles correspond to the positions of the flue gas heat exchanger 22. The liquid pump 47 is installed on the upper surface of the flue gas recovery box 11. The liquid pump 47 is inserted into the fixed base 43 through the connecting hose and is connected to the inside of the connecting pipe 44.

[0032] The cleaning fluid can be drawn by the pump 47 and delivered to the inside of the connecting pipe 44 through the connecting hose. Then, the outer surfaces on both sides of the flue gas heat exchanger 22 are rinsed through the nozzles of the two sets of flushing pipes 46. The cleaning fluid is a neutral descaling agent with a pH value of 6-8 to avoid corrosion of the fins and pipes of the flue gas heat exchanger 22. The nozzles of the flushing pipes 46 adopt a 45° fan-shaped spray angle and a spray pressure of 0.3-0.5MPa to ensure that the cleaning fluid can penetrate into the gaps between the fins of the flue gas heat exchanger 22.

[0033] Working principle and usage process of this utility model: In use, flue gas first enters the flue gas recovery box 11 through a set of flue gas channels 12; then cold water enters the flue gas heat exchanger 22 through the water inlet pipe 23 to exchange heat with the flue gas in the box. The hot water after heat exchange is discharged from the water outlet pipe 24 to the collection container to realize waste heat recovery. When the surface of the flue gas heat exchanger 22 needs to be rinsed, the liquid pump 47 is started to draw out the cleaning liquid and deliver it to the connecting pipe 44 through the connecting hose. Then, the liquid is diverted from the connecting pipe 44 to two sets of rinsing pipes 46. The nozzles in the rinsing pipes 46 rinse the two sides of the surface of the flue gas heat exchanger 22. At the same time, the cylinder 42 is started to push the fixed seat 43, which drives the connecting pipe 44 and the two sets of rinsing pipes 46 to move down synchronously to expand the rinsing range. The wastewater generated by rinsing flows into the drain base 13 through the drain troughs 14 on both sides of the lower surface of the flue gas recovery box 11 and is finally discharged from the drain base 13. When maintenance and repair of the waste heat recovery structure 2 are required, pull the pull plate 32 to cause the fixed stop 33 to disengage from the front surface of the fixed frame 21. Then, pull the fixed frame 21 to pull the entire waste heat recovery structure 2 out of the flue gas recovery box 11 for maintenance. After maintenance, push the waste heat recovery structure 2 back into the flue gas recovery box 11. At this time, the magnetic block 27 at the rear end of the fixed frame 21 will attract the rear end surface inside the flue gas recovery box 11 to achieve initial positioning. Release the pull plate 32, the compression spring 34 will reset and push the fixed stop 33 to fit against the front surface of the fixed frame 21, thus completing the fixation of the waste heat recovery structure 2.

[0034] However, as is well known to those skilled in the art, the working principles and wiring methods of cylinder 42 and liquid pump 47 are commonplace and are all conventional means or common knowledge, so they will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience. Furthermore, all movable parts in this application need to be cleaned and maintained regularly (including but not limited to dust removal, lubrication, etc.) to ensure their normal operation.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery and treatment device for coal coking flue gas, characterized in that, include: The main structure (1) includes a flue gas recovery box (11), a drainage trough (14) and a limiting slide (15), and the drainage trough (14) is provided in two sets; Waste heat recovery structure (2), the waste heat recovery structure (2) includes a fixed frame (21), a flue gas heat exchanger (22), a limiting slider (25), a moving wheel (26) and a magnetic block (27), the moving wheel (26) and the magnetic block (27) are provided in two sets, and the limiting slider (25) is slidably inserted into the inside of the limiting slide (15); The fixed structure (3) includes a mounting base (31), a fixed stop (33) and a compression spring (34). The mounting base (31) is fixedly connected to the outer surface of the front end of the flue gas recovery box (11). The flushing structure (4) includes a mounting bracket (41), a cylinder (42), a connecting pipe (44), a flushing pipe (46), and a liquid pump (47). The flushing pipe (46) is provided in two sets, and the mounting bracket (41) is fixedly connected to the upper surface of the flue gas recovery box (11).

2. The waste heat recovery treatment device for coal coking flue gas according to claim 1, characterized in that: Both ends of the flue gas recovery box (11) are connected to flue gas channels (12). A drainage base (13) is fixedly connected to the lower surface of the flue gas recovery box (11). Two sets of drainage channels (14) are respectively opened inside the lower surface of the flue gas recovery box (11). The interior of the drainage base (13) is connected to the interior of the two sets of drainage channels (14).

3. The waste heat recovery treatment device for coal coking flue gas according to claim 1, characterized in that: The limiting slide (15) is fixedly connected to the middle position of the lower inner surface of the flue gas recovery box (11). The outer surface of the fixing frame (21) slides and fits against the inner surface of the front end of the flue gas recovery box (11). The outer surface of the front end of the fixing frame (21) is flush with the outer surface of the front end of the flue gas recovery box (11).

4. The waste heat recovery treatment device for coal coking flue gas according to claim 1, characterized in that: The flue gas heat exchanger (22) is fixedly connected to the inside of the fixed frame (21), and the inside of the two ends of the flue gas heat exchanger (22) is respectively connected to the inlet pipe (23) and the outlet pipe (24).

5. The waste heat recovery treatment device for coal coking flue gas according to claim 1, characterized in that: The limiting slider (25) is fixedly connected to the middle position of the lower surface of the fixed frame (21). The two sets of moving wheels (26) are respectively installed on both sides of the lower surface of the fixed frame (21), and the outer surface of the lower end of the two sets of moving wheels (26) rolls and fits against the lower surface inside the flue gas recovery box (11). The two sets of magnetic blocks (27) are respectively fixedly connected to the outer surfaces of the rear ends of the fixed frame (21). The magnetic blocks (27) can fit against the surfaces of the front and rear ends inside the flue gas recovery box (11).

6. The waste heat recovery treatment device for coal coking flue gas according to claim 1, characterized in that: A pull plate (32) is slidably inserted into the front surface of the mounting base (31). The fixed block (33) is slidably inserted into the interior of the mounting base (31) near the fixed frame (21). The rear end of the pull plate (32) is fixedly connected to the front end of the fixed block (33). The surface of the rear end of the fixed block (33) is in contact with the outer surface of the front end of the fixed frame (21). A compression spring (34) is provided inside the mounting base (31). One end of the compression spring (34) is fixedly connected to the end of the fixed block (33) away from the fixed frame (21). The other end of the compression spring (34) elastically abuts against the inner surface of the mounting base (31).

7. The waste heat recovery treatment device for coal coking flue gas according to claim 1, characterized in that: The cylinder (42) is installed on one side of the upper end of the mounting bracket (41). The lower end of the push rod inside the cylinder (42) is fixedly connected to the fixed seat (43). The outer surface of the middle position of the connecting pipe (44) is fixedly connected to the inner wall of the fixed seat (43). Limiting strips (45) are fixedly connected to the outer surfaces of both ends of the connecting pipe (44). The connecting pipe (44) and the two sets of limiting strips (45) are slidably inserted into the interior of both ends of the upper surface of the flue gas recovery box (11).

8. The waste heat recovery treatment device for coal coking flue gas according to claim 1, characterized in that: The two sets of flushing pipes (46) are connected to the lower end of the connecting pipe (44). The two sets of flushing pipes (46) are equipped with multiple sets of nozzles, and the positions of the two sets of nozzles correspond to the positions of the flue gas heat exchanger (22). The liquid pump (47) is installed on the upper surface of the flue gas recovery box (11). The liquid pump (47) is inserted into the fixed seat (43) through the connecting hose and is connected to the inside of the connecting pipe (44).

Images