Waste heat recycling device for ascension pipe of coke oven
By installing heat-conducting plates and shape memory alloy wires on the outer wall of the coke oven riser pipe, a fan drives airflow to transfer heat and convert it into electrical energy, solving the problem of unutilized sensible heat of coke oven raw gas and realizing efficient recovery of waste heat and production of electricity.
Patent Information
- Application Number
- CN202520404988.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-10
AI Technical Summary
In traditional coking processes, the sensible heat of raw coke oven gas is not effectively recovered and utilized, resulting in a waste of thermal energy resources. Furthermore, the ammonia injection quenching process consumes a large amount of ammonia.
A waste heat recovery and utilization device for coke oven riser pipe is adopted. The fan drives the airflow through the heat-conducting plate to the shape memory alloy wire. The mechanical energy generated by the shape change of the shape memory alloy wire is converted into electrical energy, thereby realizing the recovery and utilization of waste heat.
It has achieved effective recovery of sensible heat from coke oven gas, reduced energy waste, lowered ammonia water consumption, and provided electricity to support production.
Smart Images
Figure CN223921347U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste heat recovery technology, and in particular to a waste heat recovery and utilization device for coke oven riser pipe. Background Technology
[0002] During the coking process, the carbonization chamber produces a large amount of raw coal gas, which is cooled by the coke oven riser pipe, bridge pipe, and gas collecting pipe before being sent to the chemical production system for purification. The raw coal gas reaches a temperature of up to 800℃ when passing through the coke oven riser pipe and contains a large amount of sensible heat.
[0003] To lower the temperature of raw coke oven gas for subsequent coking processes, traditional methods employ ammonia injection for rapid cooling of the high-temperature raw gas, drastically reducing its temperature to 80-85°C. This process not only wastes a significant amount of the raw gas's sensible heat but also consumes large quantities of ammonia, resulting in a substantial waste of thermal energy resources. Utility Model Content
[0004] The purpose of this utility model is to address the aforementioned problems and shortcomings by proposing a waste heat recovery and utilization device for coke oven riser pipes: after the fan is started, the airflow is driven through the heat-conducting plate and then transferred to the shape memory alloy wire, which facilitates temperature transfer, facilitates the utilization of waste heat for energy saving, and facilitates auxiliary use in power generation.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A coke oven riser pipe waste heat recovery and utilization device includes a riser pipe and a heat insulation cover installed on the outer wall of the riser pipe. A heat-conducting plate is installed on the outer wall of the riser pipe inside the heat insulation cover, and a conversion structure is provided at one end of the bottom inner wall of the heat insulation cover. The conversion structure includes an adjusting screw rotatably connected to the bottom outer wall of one end of the heat insulation cover, a sliding plate rotatably connected to one end of the adjusting screw, a set of second connecting seats installed on the top outer wall of the sliding plate, a first connecting seat installed on the bottom inner wall of the heat insulation cover, a first rotating shaft installed at one end of the first connecting seat, and a second rotating shaft installed at one end of the second connecting seat.
[0007] Preferably, a drive wheel is installed on the outer wall of the first rotating shaft, and an impact wheel is installed in the second rotating shaft, with impact blocks evenly distributed on the outer wall of the impact wheel.
[0008] Preferably, a shape memory alloy wire is connected between the drive wheel and the impact wheel, and a piezoelectric cantilever beam is installed at one end of the top outer wall of the sliding plate, and a piezoelectric vibrator is installed at the top of the piezoelectric cantilever beam.
[0009] Preferably, one end of the piezoelectric vibrator is in contact with the outer wall of the impact block of the impact wheel.
[0010] Preferably, the inner walls of both sides of the heat insulation cover are welded with limit strips at the sliding plate, and the outer walls of both sides of the sliding plate are slidably connected to the inner wall of the heat insulation cover and the outer wall of the limit strip, respectively.
[0011] Preferably, an auxiliary hole is provided at the center of the outer wall of one end of the heat insulation cover, and a fan is installed at the auxiliary hole of the heat insulation cover, with an interception net installed on the inner wall of the fan.
[0012] Preferably, the fan is connected to a switch via a wire, and the switch is connected to a power source via a wire.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. After the fan is turned on, the airflow passes through the heat-conducting plate and is transferred to the shape memory alloy wire, which facilitates temperature transfer, makes it easier to use waste heat for energy saving, and facilitates auxiliary power generation.
[0015] 2. Rotating the adjusting screw causes the sliding plate to move within the heat insulation cover, facilitating the adjustment of the distance between the impact wheel and the drive wheel. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the internal structure of a waste heat recovery and utilization device for a coke oven riser pipe proposed in this utility model.
[0017] Figure 2 This is a cross-sectional structural diagram of a waste heat recovery and utilization device for a coke oven riser pipe proposed in this utility model.
[0018] Figure 3 This is a schematic diagram of the top structure of the sliding plate of a waste heat recovery and utilization device for a coke oven riser pipe proposed in this utility model.
[0019] Figure 4 This is a schematic diagram of the overall structure of a waste heat recovery and utilization device for a coke oven riser pipe proposed in this utility model.
[0020] Figure 5 This is a schematic diagram of the mechanical analysis structure of a waste heat recovery and utilization device for a coke oven riser pipe proposed in this utility model.
[0021] In the diagram: 1 riser pipe, 2 heat shield, 3 conversion structure, 4 heat conduction plate, 5 fan, 6 interception net, 7 limit strip, 8 sliding plate, 9 adjusting screw, 10 first connecting seat, 11 first rotating shaft, 12 drive wheel, 13 second connecting seat, 14 second rotating shaft, 15 impact wheel, 16 impact block, 17 shape memory alloy wire, 18 piezoelectric cantilever beam, 19 piezoelectric vibrator. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] Example:
[0024] Reference Figure 1-5 A coke oven riser pipe waste heat recovery and utilization device includes a riser pipe 1 and a heat insulation cover 2 installed on the outer wall of the riser pipe 1. A heat-conducting plate 4 is installed on the outer wall of the riser pipe 1 inside the heat insulation cover 2, and a conversion structure 3 is provided at one end of the bottom inner wall of the heat insulation cover 2. Limiting strips 7 are welded to the inner walls of both sides of the heat insulation cover 2 at the sliding plate 8, and the outer walls of both sides of the sliding plate 8 are slidably connected to the inner wall of the heat insulation cover 2 and the outer wall of the limiting strip 7, respectively. At the same time, the heat insulation cover 2 encloses the conversion structure 3 and the heat-conducting plate 4. After the fan 5 is started, the airflow is driven through the heat-conducting plate 4 and then transferred to the shape memory alloy wire 17 to facilitate temperature transfer.
[0025] The conversion structure 3 includes an adjusting screw 9 rotatably connected to the outer wall of the bottom of one end of the heat insulation cover 2, a sliding plate 8 rotatably connected to one end of the adjusting screw 9, a set of second connecting seats 13 installed on the outer wall of the top of the sliding plate 8, a first connecting seat 10 installed on the inner wall of the bottom of the heat insulation cover 2, a first rotating shaft 11 installed on one end of the first connecting seat 10, and a second rotating shaft 14 installed on one end of the second connecting seat 13.
[0026] A drive wheel 12 is installed on the outer wall of the first rotating shaft 11, and an impact wheel 15 is installed in the second rotating shaft 14. The outer wall of the impact wheel 15 is provided with impact blocks 16 distributed at equal intervals.
[0027] A shape memory alloy wire 17 is connected between the drive wheel 12 and the impact wheel 15, and a piezoelectric cantilever beam 18 is installed at one end of the top outer wall of the sliding plate 8, and a piezoelectric vibrator 19 is installed at the top of the piezoelectric cantilever beam 18.
[0028] One end of the piezoelectric vibrator 19 is in contact with the outer wall of the impact block 16 on the outer wall of the impact wheel 15.
[0029] An auxiliary hole is provided at the center of the outer wall of one end of the heat insulation cover 2, and a fan 5 is installed at the auxiliary hole of the heat insulation cover 2. An interception net 6 is installed on the inner wall of the fan 5. Rotating the adjusting screw 9 causes the sliding plate 8 to move in the heat insulation cover 2, which facilitates the adjustment of the distance between the impact wheel 15 and the drive wheel 12.
[0030] Fan 5 is connected to the switch via a wire, and the switch is connected to the power supply via a wire.
[0031] Working principle: The heat-conducting plate 4 is installed on the outer wall of the riser pipe 1. Simultaneously, the heat insulation cover 2 encloses the conversion structure 3 and the heat-conducting plate 4. After the fan 5 is started, the airflow passes through the heat-conducting plate 4 and is transferred to the shape memory alloy wire 17, facilitating temperature transfer. Rotating the adjusting screw 9 causes the sliding plate 8 to move within the heat insulation cover 2, facilitating the adjustment of the distance between the impact wheel 15 and the drive wheel 12. Heat gradually adheres to the surface of the shape memory alloy wire 17. When the temperature rises above the austenite phase transformation initiation temperature, the shape memory alloy wire 17 deforms, straightening from a bent state. The shape memory alloy wire 17 generates torque on the drive wheel 12, causing the drive wheel 12 to rotate, thereby driving the impact wheel 15. 5 also rotates, which will drive the shape memory alloy wire 17 away from the initial position. After the shape memory alloy wire 17 leaves the heating area, the temperature drops and the length of the Ni-Ti wire in the martensitic state recovers, while the martensite in the heating area continues to transform into austenite. The Ni-Ti alloy wire contracts, causing the drive wheel 12 and the impact wheel 15 to rotate continuously. During the rotation of the impact wheel 15, the impact block 16 on its surface will hit the piezoelectric vibrator 19 and deform. Due to the positive piezoelectric effect, the piezoelectric material generates charge to form electrical energy, thereby realizing the conversion of mechanical energy into electrical energy. Finally, personnel can connect the wire harness in the piezoelectric cantilever beam 18 to supply power to other equipment.
[0032] Transformation Structural Mechanics Analysis: The shape memory alloy wire 17 has an initial preload F0. When heating begins at the lower end of the drive wheel 12, reaching the phase transition temperature at point 2, the shape memory alloy wire 17 begins to straighten due to the shape memory effect. This causes the contact point between the shape memory alloy wire 17 and the drive wheel 12 to move from point 2 to point 2'. As the shape memory alloy wire 17 contracts when heated, its lower side becomes the tight side. Simultaneously, the force F1 on the tight side is decomposed into F12 along the F0 direction and F11 perpendicular to the F0 direction. Due to the change in the contact point caused by the straightening of the shape memory alloy wire 17 from bending, the force F11 generates a torque Th, which causes the drive wheel 12 to rotate the entire device. At the same time, the initial preload of the shape memory alloy wire 17 increases from F0 to F12, while the preload on the slack side decreases from F0 to F2. At this point, the effective tension of the shape memory alloy wire 17 is F12 - F2. Under the action of the effective tension, the shape memory alloy wire 17 rotates together with the two wheels.
[0033] The exemplary embodiments of the present invention have been described in detail herein with reference to examples. However, those skilled in the art will understand that various modifications and alterations can be made to the specific embodiments described above without departing from the spirit of the present invention, and various combinations can be made to the various technical features and structures proposed in the present invention without exceeding the protection scope of the present invention, which is determined by the appended claims. The foregoing description of specific exemplary embodiments of the present invention is not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical applications, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.
Claims
1. A coke oven uptake heat recovery and utilization device, comprising an uptake (1) and a heat shield (2) installed on the outer wall of the uptake (1), characterized in that, The outer wall of the ascending pipe (1) is provided with a heat-conducting plate (4) inside the heat-insulating cover (2), and the bottom inner wall of the heat-insulating cover (2) is provided with a conversion structure (3) at one end. The conversion structure (3) comprises an adjusting screw (9) rotatably connected to the bottom outer wall of the heat-insulating cover (2) at one end, a sliding plate (8) rotatably connected to one end of the adjusting screw (9), a group of second connecting seats (13) mounted on the top outer wall of the sliding plate (8), a first connecting seat (10) mounted on the bottom inner wall of the heat-insulating cover (2), a first rotating shaft (11) mounted on one end of the first connecting seat (10), and a second rotating shaft (14) mounted on one end of the second connecting seat (13).
2. The coke oven uptake heat recovery and utilization device according to claim 1, characterized in that, The outer wall of the first rotating shaft (11) is provided with a driving wheel (12), and the second rotating shaft (14) is provided with an impact wheel (15) therein, and the outer wall of the impact wheel (15) is provided with impact blocks (16) distributed at equal distances.
3. The coke oven uptake heat recovery and utilization device according to claim 2, characterized in that, The driving wheel (12) and the impact wheel (15) are connected by a memory alloy wire (17), and the top outer wall of the sliding plate (8) is provided with a piezoelectric cantilever beam (18) at one end, and the top end of the piezoelectric cantilever beam (18) is provided with a piezoelectric vibrator (19).
4. The coke oven uptake heat recovery and utilization device according to claim 3, characterized in that, One end of the outer wall of the piezoelectric vibrator (19) is in contact with the outer wall of the impact block (16) of the impact wheel (15).
5. The coke oven uptake heat recovery and utilization device according to claim 1, characterized in that, The inner walls of both sides of the heat-insulating cover (2) are welded with limit strips (7) at the sliding plate (8), and the outer walls of both sides of the sliding plate (8) are respectively slidably connected to the inner wall of the heat-insulating cover (2) and the outer wall of the limit strip (7).
6. The coke oven uptake heat recovery and utilization device according to claim 1, characterized in that, An auxiliary hole is formed at the center of one end of the outer wall of the heat-insulating cover (2), and the heat-insulating cover (2) is provided with a fan (5) at the auxiliary hole, and the inner wall of the fan (5) is provided with a blocking net (6).
7. The coke oven uptake heat recovery and utilization device according to claim 6, characterized in that, The fan (5) is connected to a switch by wires, and the switch is connected to a power supply by wires.