Boiler bottom slag heat energy recovery slag well
By introducing a crushing mechanism and a heat recovery pipeline into the boiler bottom ash heat recovery well, the problem of low heat recovery efficiency in the boiler ash well was solved, and rapid and full recovery of heat from the boiler bottom ash was achieved.
Patent Information
- Application Number
- CN202423258373.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing boiler ash wells cannot effectively recover heat from the bottom ash during crushing, resulting in heat waste.
Design a boiler bottom ash heat recovery well, including a crushing mechanism and a heat recovery pipeline. The heat absorption and transfer are realized by combining the crushing roller with the water storage chamber, and the heat exchange of the medium is carried out by heat exchange fins and heat exchange coils.
It improves the efficiency of heat recovery, reduces heat waste, and enables rapid and full recovery of heat from boiler bottom ash.
Smart Images
Figure CN223649333U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat energy recovery, and in particular to a boiler bottom ash heat energy recovery ash well. Background Technology
[0002] The boiler slag well is an important component of a coal-fired power plant boiler. It is located between the lower header baffle of the boiler water-cooled wall and the upper tank of the dry slag discharge machine, serving as a transitional connection and heat recovery function.
[0003] As is well known, in the process of collecting bottom ash from boiler ash wells, larger boiler bottom ash needs to be crushed. In other words, the crushed part will come into full contact with the boiler bottom ash, thereby absorbing the heat from the boiler bottom ash. However, the heat from this part cannot be effectively recovered, resulting in some waste.
[0004] Therefore, it is essential to invent a boiler bottom ash heat recovery well. Utility Model Content
[0005] To solve the above-mentioned technical problems, the present invention provides a technical solution for a boiler bottom ash heat energy recovery ash well: a boiler bottom ash heat energy recovery ash well, including an ash well, wherein: an ash outlet is provided at the bottom of the ash well, a crushing mechanism is fixedly installed at the top of the ash well, and a heat energy recovery pipeline is provided between the crushing mechanism and the ash well.
[0006] Preferably, the crushing mechanism includes a crushing chamber, a collecting hopper, a first crushing roller, a second crushing roller, a motor, and gears. The collecting hopper is fixedly installed on the opening at the top of the crushing chamber. The first and second crushing rollers are meshed and rotatably installed inside the crushing chamber. The two ends of the first and second crushing rollers extend evenly from both sides of the crushing chamber. One adjacent end of the first and second crushing rollers is connected by gear meshing. The other end of the first crushing roller is fixedly connected to the output end of the motor through a coupling.
[0007] Preferably, the interiors of the first and second crushing rollers are rotatably connected to the heat recovery pipe;
[0008] Preferably, the motor is fixedly mounted on one side outside the crushing chamber via a bracket.
[0009] Preferably, the outer surfaces of the first crushing roller and the second crushing roller are each detachably fixedly equipped with crushing teeth, and the crushing teeth on the first crushing roller and the crushing teeth on the second crushing roller are arranged alternately.
[0010] Preferably, the first crushing roller and the second crushing roller each have a coaxial water storage cavity inside, and a number of heat exchange fins are uniformly fixedly installed on the surface of the water storage cavity. The water storage cavity is rotatably connected to the heat recovery pipeline.
[0011] Preferably, a heat exchange cavity is provided on the well wall of the slag well, and a part of the heat recovery pipeline is fixedly installed in the heat exchange cavity.
[0012] Preferably, the heat recovery pipeline includes a rotary joint, an inlet pipe, an outlet pipe, a heat exchange coil, a cold water pipe, and a hot water pipe. At least two rotary joints are provided, and the two rotary joints are rotatably connected to one end of the gears mounted on the corresponding first crushing roller and second crushing roller. The rotary joints are located outside the gears.
[0013] Preferably, an inlet pipe and an outlet pipe are fixedly installed on the rotary joint. One end of the inlet pipe and the outlet pipe extend into the water storage chamber inside the corresponding first crushing roller and second crushing roller. The inlet pipe is on the side away from the rotary joint, and the outlet pipe is on the side closer to the rotary joint.
[0014] Preferably, at least two heat exchange coils are provided, one for water inlet and the other for water outlet, and the heat exchange coils are evenly and fixedly installed in the heat exchange chamber;
[0015] Preferably, one end of the heat exchange coil for water inlet is fixedly connected to the end of the water inlet pipe outside the rotary joint, and the other end of the heat exchange coil for water inlet is fixedly connected to one end of the cold water pipe, with the other end of the cold water pipe located outside the slag well below.
[0016] Preferably, one end of the heat exchange coil for water outlet is fixedly connected to the end of the water outlet pipe outside the rotary joint, and the other end of the heat exchange coil for water outlet is fixedly connected to one end of the hot water pipe, with the other end of the hot water pipe located outside the slag well.
[0017] Preferably, the rotary joint is fixedly connected to the outside of the crushing chamber via a bracket.
[0018] Preferably, the end of the water outlet pipe inside the water storage chamber is L-shaped, with the L-port of the water outlet pipe facing downwards. No heat exchange fins are provided at the L-port of the water outlet pipe, and a water level sensor is provided on the end of the water outlet pipe inside the water storage chamber.
[0019] Preferably, a control box is fixedly installed on the outside of the crushing chamber, and the controller inside the control box is electrically connected to the motor and the water level sensor.
[0020] Compared with the prior art, the advantages of this utility model are:
[0021] The overall design of this invention allows the first and second crushing rollers to absorb heat from the boiler bottom ash during the crushing process. This heat is then exchanged with the medium inside the water storage chamber via the first and second crushing rollers. Simultaneously, the medium inside the water storage chamber rotates during the crushing process, thus facilitating rapid and efficient heat exchange. This not only reduces heat waste but also improves heat exchange efficiency. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0023] Figure 2 This is a schematic diagram of a partial cross-sectional structure of the slag well of this utility model.
[0024] Figure 3 This is a partial cross-sectional view of the first crushing roller of this utility model.
[0025] In the picture:
[0026] 1. Slag well; 2. Crushing chamber; 3. Collection hopper; 4. First crushing roller; 5. Second crushing roller; 6. Motor; 7. Gear; 8. Rotary joint; 9. Bracket; 10. Inlet pipe; 11. Outlet pipe; 12. Heat exchange coil; 13. Cold water pipe; 14. Hot water pipe; 15. Support; 16. Heat exchange chamber; 17. Crushing teeth; 18. Heat exchange fins; 19. Water level sensor. Detailed Implementation
[0027] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0028] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.
[0029] The present invention will be further described below with reference to the accompanying drawings: Example
[0030] Reference Figure 1-3 A boiler bottom ash heat recovery well includes a ash well 1, wherein: the bottom of the ash well 1 is provided with a ash outlet, and the top of the ash well 1 is fixedly installed with a crushing mechanism so that the larger boiler bottom ash is crushed by the crushing mechanism before entering the ash well 1. A heat recovery pipe is provided between the crushing mechanism and the ash well 1 so that during the crushing process, the heat recovery pipe and the boiler bottom ash can be fully exchanged with each other to recover the heat energy of the boiler bottom ash.
[0031] In this embodiment, the crushing mechanism includes a crushing chamber 2, a collecting hopper 3, a first crushing roller 4, a second crushing roller 5, a motor 6, and a gear 7. The collecting hopper 3 is fixedly installed on the opening at the top of the crushing chamber 2. The first crushing roller 4 and the second crushing roller 5 are meshed and rotatably installed inside the crushing chamber 2. The two ends of the first crushing roller 4 and the second crushing roller 5 extend evenly from both sides of the crushing chamber 2. One adjacent end of the first crushing roller 4 and the second crushing roller 5 is connected by meshing gear 7. The other end of the first crushing roller 4 is fixedly connected to the output end of the motor 6 through a coupling, so that the first crushing roller 4 and the second crushing roller 5 crush the boiler bottom ash entering the crushing chamber 2 under the drive of the motor 6.
[0032] In this embodiment, the interior of the first crushing roller 4 and the second crushing roller 5 are rotatably connected to the heat recovery pipe so that the first crushing roller 4 and the second crushing roller 5 will not be affected by the heat recovery pipe during rotation.
[0033] In this embodiment, the motor 6 is fixedly installed on one side outside the crushing chamber 2 by the bracket 15 so as to ensure the stability of the motor 6.
[0034] In this embodiment, crushing teeth 17 are detachably and fixedly installed on the outer surfaces of the first crushing roller 4 and the second crushing roller 5. The crushing teeth 17 on the first crushing roller 4 and the crushing teeth 17 on the second crushing roller 5 are arranged alternately so as to crush the boiler bottom ash through the crushing teeth 17.
[0035] In this embodiment, the first crushing roller 4 and the second crushing roller 5 each have a coaxial water storage cavity inside, so that the heat exchange medium is transported into the water storage cavity through the heat energy recovery pipe, so that the medium exchanges heat with the boiler bottom ash in the water storage cavity. A number of heat exchange fins 18 are uniformly fixedly installed on the surface of the water storage cavity, so that the heat absorbed by the first crushing roller 4 and the second crushing roller 5 is transferred to the medium inside the water storage cavity through the heat exchange fins 18. The water storage cavity is rotatably connected to the heat energy recovery pipe.
[0036] In this embodiment, a heat exchange chamber 16 is provided on the well wall of the slag well 1. A part of the heat recovery pipe is fixedly installed in the heat exchange chamber 16 to provide installation space and heat exchange space for the heat exchange coil 12, and at the same time protect the heat exchange coil 12 to avoid collision with the bottom slag of the boiler.
[0037] In this embodiment, the heat recovery pipeline includes a rotary joint 8, an inlet pipe 10, an outlet pipe 11, a heat exchange coil 12, a cold water pipe 13, and a hot water pipe 14. At least two rotary joints 8 are provided. The two rotary joints 8 are rotatably connected to one end of the gear 7 mounted on the corresponding first crushing roller 4 and second crushing roller 5. The rotary joints 8 are located outside the gear 7. By setting the rotary joints 8, the sealing between the first crushing roller 4 and second crushing roller 5 and the heat recovery pipeline can be guaranteed, while not affecting the normal rotation of the first crushing roller 4 and second crushing roller 5.
[0038] In this embodiment, a water inlet pipe 10 and a water outlet pipe 11 are fixedly installed on the rotary joint 8. One end of the water inlet pipe 10 and the water outlet pipe 11 extend into the water storage chamber inside the corresponding first crushing roller 4 and second crushing roller 5. The water inlet pipe 10 is on the side away from the rotary joint 8 so that the medium that needs to be heat exchanged can be transported to the water storage chamber through the water inlet pipe 10. The water outlet pipe 11 is on the side close to the rotary joint 8 so that the medium that has completed heat exchange in the water storage chamber can be discharged through the water outlet pipe 11.
[0039] In this embodiment, at least two heat exchange coils 12 are provided, one for water inlet and the other for water outlet. The heat exchange coils 12 are uniformly and fixedly installed in the heat exchange chamber 16 so that the medium that needs to be heated can be transported through the heat exchange coils 12 and heat exchange can be carried out inside the slag well 1 during the transportation process.
[0040] In this embodiment, one end of the water inlet heat exchange coil 12 is fixedly connected to the end of the water inlet pipe 10 outside the rotary joint 8, and the other end of the water inlet heat exchange coil 12 is fixedly connected to one end of the cold water pipe 13. The other end of the cold water pipe 13 is located outside the slag well 1 below, so that the medium that has not been heat exchanged can enter the slag well 1 through the water inlet heat exchange coil 12, perform the first heat exchange in the slag well 1, and then enter the first crushing roller 4 and the second crushing roller 5 for the second heat exchange.
[0041] In this embodiment, one end of the outlet heat exchange coil 12 is fixedly connected to the end of the outlet pipe 11 outside the rotary joint 8, and the other end of the outlet heat exchange coil 12 is fixedly connected to one end of the hot water pipe 14. The other end of the hot water pipe 14 is located outside the slag well 1, so that the medium after heat exchange inside the first crushing roller 4 and the second crushing roller 5 can undergo a third heat exchange in the slag well 1 through the outlet heat exchange coil 12.
[0042] In this embodiment, the rotary joint 8 is fixedly connected to the outside of the crushing chamber 2 via the bracket 9 to ensure the stability of the rotary joint 8.
[0043] In this embodiment, the end of the water outlet pipe 11 inside the water storage chamber is L-shaped, with the L-port of the water outlet pipe 11 facing downwards, so that the medium inside the water storage chamber can be fully extracted with the help of an external suction pump. No heat exchange fins 18 are provided at the L-port of the water outlet pipe 11 to avoid being blocked by the heat exchange fins 18 when extracting the medium. A water level sensor 19 is provided on the end of the water outlet pipe 11 inside the water storage chamber. The water level sensor 19 is used in conjunction with an external automatic water supply device to monitor the water level inside the water storage chamber in real time and control the on / off of the water supply pump.
[0044] The water level sensor 19 adopts existing technologies, such as resistive water level sensors, thermal water level sensors, photoelectric water level sensors, etc.
[0045] In this embodiment, a control box is fixedly installed on the outside of the crushing chamber 2. The output terminal of the controller inside the control box is electrically connected to the motor 6, and the water level sensor 19 is electrically connected to the input terminal of the controller. The controller adopts existing technology, such as the PLC controller in the prior art.
[0046] In practical use, this utility model is connected to an external cold water supply device via a cold water pipe 13, and to an external hot water collection device or user device via a hot water pipe 14.
[0047] When the boiler bottom ash falls into the crushing chamber 2 through the collection hopper 3, the first crushing roller 4 and the second crushing roller 5 will crush the boiler bottom ash that has entered the crushing chamber 2 under the drive of the motor 6. During the crushing process, the first crushing roller 4 and the second crushing roller 5 will not only drive the medium to rotate, but also the first crushing roller 4, the second crushing roller 5, the ash well 1 and the heat exchange coil 12 will absorb the heat of the boiler bottom ash, so that the medium can fully exchange heat in the water storage chamber and the ash well 1.
[0048] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.
Claims
1. A boiler bottom ash heat recovery well, characterized in that: Includes a slag well (1), wherein: the bottom of the slag well (1) is provided with a slag outlet, the top of the slag well (1) is fixedly installed with a crushing mechanism, and a heat recovery pipeline is provided between the crushing mechanism and the slag well (1).
2. The boiler bottom ash heat recovery well as described in claim 1, characterized in that: The crushing mechanism includes a crushing chamber (2), a collecting hopper (3), a first crushing roller (4), a second crushing roller (5), a motor (6), and a gear (7). The collecting hopper (3) is fixedly installed on the opening at the top of the crushing chamber (2). The first crushing roller (4) and the second crushing roller (5) are meshed and rotated inside the crushing chamber (2). The two ends of the first crushing roller (4) and the second crushing roller (5) extend evenly from both sides of the crushing chamber (2). The adjacent ends of the first crushing roller (4) and the second crushing roller (5) are connected by meshing gear (7). The other end of the first crushing roller (4) is fixedly connected to the output end of the motor (6) through a coupling. The interiors of the first crushing roller (4) and the second crushing roller (5) are rotatably connected to the heat recovery pipe; The motor (6) is fixedly installed on one side outside the crushing chamber (2) by a bracket (15).
3. A boiler bottom ash heat recovery well as described in claim 2, characterized in that: The outer surfaces of the first crushing roller (4) and the second crushing roller (5) are each detachably fixed with crushing teeth (17), and the crushing teeth (17) on the first crushing roller (4) and the crushing teeth (17) on the second crushing roller (5) are arranged alternately.
4. A boiler bottom ash heat recovery well as described in claim 3, characterized in that: The first crushing roller (4) and the second crushing roller (5) each have a coaxial water storage cavity inside. Several heat exchange fins (18) are uniformly fixed on the surface of the water storage cavity. The water storage cavity is rotatably connected to the heat recovery pipeline.
5. A boiler bottom ash heat recovery well as described in claim 4, characterized in that: A heat exchange chamber (16) is provided on the well wall of the slag well (1), and a part of the heat recovery pipeline is fixedly installed in the heat exchange chamber (16).
6. A boiler bottom ash heat recovery well as described in claim 5, characterized in that: The heat recovery pipeline includes a rotary joint (8), an inlet pipe (10), an outlet pipe (11), a heat exchange coil (12), a cold water pipe (13), and a hot water pipe (14). At least two rotary joints (8) are provided. The two rotary joints (8) are rotatably connected to one end of the gear (7) mounted on the corresponding first crushing roller (4) and second crushing roller (5). The rotary joints (8) are located outside the gear (7). The rotary joint (8) is fixedly installed with an inlet pipe (10) and an outlet pipe (11). One end of the inlet pipe (10) and the outlet pipe (11) extend into the water storage chamber inside the corresponding first crushing roller (4) and second crushing roller (5). The inlet pipe (10) is on the side away from the rotary joint (8), and the outlet pipe (11) is on the side close to the rotary joint (8). At least two heat exchange coils (12) are provided, one for water inlet and the other for water outlet. The heat exchange coils (12) are uniformly and fixedly installed in the heat exchange chamber (16). One end of the heat exchange coil (12) for water inlet is fixedly connected to the end of the water inlet pipe (10) outside the rotary joint (8), and the other end of the heat exchange coil (12) for water inlet is fixedly connected to one end of the cold water pipe (13), and the other end of the cold water pipe (13) is located outside the slag well (1) below. One end of the heat exchange coil (12) for water outlet is fixedly connected to the end of the water outlet pipe (11) outside the rotary joint (8), and the other end of the heat exchange coil (12) for water outlet is fixedly connected to one end of the hot water pipe (14), and the other end of the hot water pipe (14) is located outside the slag well (1).
7. A boiler bottom ash heat recovery well as described in claim 6, characterized in that: The rotary joint (8) is fixedly connected to the outside of the crushing chamber (2) via a bracket (9).
8. A boiler bottom ash heat recovery well as described in claim 6, characterized in that: The outlet pipe (11) is L-shaped at one end inside the water storage chamber. The L port of the outlet pipe (11) faces downward. No heat exchange fins (18) are provided at the L port of the outlet pipe (11). A water level sensor (19) is provided at the end of the outlet pipe (11) inside the water storage chamber.