Coal-fired boiler heat energy recycling device

Abstract

The utility model discloses a heat energy recycling device of a coal-fired boiler, which belongs to the technical field of coal-fired boilers and comprises a coil base and a water storage tank, and a hot water storage mechanism is arranged on the lateral portion of the coil base. According to the utility model, water vapor generated in the coil base drives the impeller in the steam exhaust pipe to rotate, the impeller is utilized to drive the generator to generate electricity, in addition, water in the steam exhaust pipe enters the heat exchange annular pipe from the steam guide pipe, and water vapor in the heat exchange annular pipe exchanges heat with water in the water storage tank to become liquid water; liquid water is guided into a condensate water storage tank from a water outlet pipe and a drainage hose to be stored, the condensate water storage tank moves downwards along with increase of water in the condensate water storage tank, and the condensate water storage tank drives a first piston plate to extrude water in an inner cavity of the water storage tank; and water in the water storage tank is guided into the coil base from the water adding pipe and the check valve to automatically supplement evaporated water, so that the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal-fired boilers, and more specifically to a heat energy recovery and utilization device for coal-fired boilers. Background Art

[0002] A coal-fired boiler is a thermal energy device that uses coal as fuel. A coal-fired boiler is usually composed of a furnace, a combustion system, a flue system, a water supply system, and a control system. During the combustion process, coal is added to the furnace, and the coal is burned through oxygen supply to produce high-temperature combustion gas. The heat energy generated is mostly used for heating. A coal-fired boiler is a device that uses coal combustion to generate heat energy. It plays an important role in heating and industrial processes, and is conducive to improving resource utilization.

[0003] After searching, the utility model patent with announcement number CN220541129U discloses a coal-fired boiler heat energy recovery and utilization device, including a furnace table, an exhaust pipe is fixedly connected to the top left side of the furnace table, the other end of the exhaust pipe is fixedly connected to the device table, an air injection port is arranged inside the device table, a steam tank is arranged inside the device table, an impeller is rotatably connected inside the steam tank, an exhaust port is arranged at the top of the device table, an air injection pipe is fixedly connected inside the exhaust port, the other end of the air injection pipe is fixedly connected to a water tank 2, a water pumping pipe is fixedly connected to the left side of the water tank 2, a water storage pipe is fixedly connected to the top of the water tank 2, a water supply pipe is fixedly connected to the bottom left side of the water storage pipe, and a water pump is fixedly connected to the left side of the water supply pipe 1; in this patent, the recycling of water vapor is realized by the composition of the exhaust pipe, the device table, the air injection port, the steam tank, the impeller and other structures.

[0004] However, the above patents still have the following shortcomings: the recycling device needs to use a water pump when running, which will waste extra electricity; when the stove is no longer burning coal for heating, it is not convenient to keep the hot water in the stove warm. For this reason, we propose a coal-fired boiler heat recovery device. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a heat energy recovery and utilization device for a coal-fired boiler.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A coal-fired boiler heat energy recovery and utilization device comprises a furnace table and a water tank, a hot water storage mechanism is arranged on the side of the furnace table, the inner cavity of the water tank is movably sleeved with two sliding rods, the top ends of the two sliding rods are fixedly connected to a first piston plate, the bottom ends of the sliding rods are movably sleeved to the bottom of the water tank and are fixedly connected to a condensate storage tank, a boiler thermal energy power generation mechanism is arranged on the furnace table, a steam guide pipe is arranged on the side of the boiler thermal energy power generation mechanism, the end of the steam guide pipe is fixedly sleeved to the inner cavity of the water tank and is fixedly connected to a heat exchange annular pipe, the side of the heat exchange annular pipe is fixedly connected to a water outlet pipe, the end of the water outlet pipe is fixedly sleeved to the outside of the water tank and is fixedly connected to a drain hose, the end of the drain hose extends to the inner cavity of the condensate storage tank, a water filling pipe is fixedly sleeved on the side of the water tank, the end of the water filling pipe is fixedly sleeved to the inner cavity of the furnace table and a check valve is fixedly installed.

[0008] As a preferred solution of the present invention, the hot water storage mechanism includes a water pumping pipe fixedly sleeved on the side of the stove top, a one-way valve is fixedly installed on the end of the water pumping pipe, a hot water storage tank is fixedly sleeved on the end of the one-way valve, a screw is threadedly sleeved on the outer side of the hot water storage tank, one end of the screw extends to the inner cavity of the hot water storage tank and is rotatably connected to a second piston plate, the side of the second piston plate is in contact with the inner wall of the hot water storage tank, the other end of the screw extends to the outside of the hot water storage tank and is fixedly connected to a knob, the outer sides of the hot water storage tank and the condensed water storage tank are both sleeved with thermal insulation cotton, and drain valves are respectively fixedly installed on the outer sides of the hot water storage tank and the condensed water storage tank.

[0009] As a preferred embodiment of the present invention, the boiler thermal energy power generation mechanism includes a stove arranged in the inner cavity of the furnace and an exhaust pipe fixedly sleeved on the top of the furnace, the inner cavity of the exhaust pipe is rotatably connected to an impeller, a generator is fixedly installed on the back of the exhaust pipe, the rotating shaft of the generator is connected to the rotating shaft of the impeller, a partition is fixedly sleeved on the side of the top of the stove, the outer side of the partition is connected to the inner wall of the furnace, a plurality of exhaust holes are opened on the top surface of the partition, and the end of the steam guide pipe is fixedly sleeved to the side of the exhaust pipe.

[0010] As a preferred solution of the utility model, the top surfaces of the water storage tank and the condensed water storage tank and the side surfaces of the hot water storage tank are respectively provided with air holes, and the inner cavities of the air holes are respectively provided with filter nets.

[0011] As a preferred solution of the utility model, the side surface of the first piston plate is in contact with the inner wall of the water tank.

[0012] As a preferred solution of the utility model, screw plugs are respectively threadedly installed on the sides of the stove top and the water tank.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) In the utility model, the water vapor generated in the furnace table drives the impeller in the exhaust pipe to rotate, and the impeller drives the generator to generate electricity. In addition, the water in the exhaust pipe enters the heat exchange annular pipe from the steam guide pipe, and the water vapor in the heat exchange annular pipe exchanges heat with the water in the water storage tank to become liquid water. The liquid water is introduced from the water outlet pipe and the drain hose into the condensate storage tank for storage. In addition, as the amount of water in the condensate storage tank increases, the condensate storage tank moves downward, and the condensate storage tank drives the first piston plate to squeeze the water in the inner cavity of the water storage tank, so that the water in the water storage tank is introduced from the water filling pipe and the check valve into the furnace table to automatically replenish the evaporated water, thereby realizing the functions of automatically exchanging heat with water vapor and automatically replenishing water in the furnace table, thereby improving the practicality of the heat energy recovery and utilization device of the coal-fired boiler.

[0015] (2) In the utility model, when coal is no longer burned, the screw is rotated by turning the knob, and the threaded fit between the screw and the hot water storage tank drives the second piston plate to move to the side away from the furnace, and the negative pressure on one side of the inner cavity of the hot water storage tank is used to cause the one-way valve and the pumping pipe to generate suction, thereby directing the hot water in the inner cavity of the furnace into the inner cavity of the hot water storage tank for storage, and the heat insulation cotton on the outside of the hot water storage tank is used to insulate the water in the hot water storage tank, thereby realizing the heat preservation and storage of the hot water in the furnace, and improving the working quality of the heat energy recovery and utilization device of the coal-fired boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the front side of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the back side of the utility model;

[0018] Figure 3 It is a cross-sectional schematic diagram of the furnace table of the utility model;

[0019] Figure 4 It is a cross-sectional schematic diagram of the water storage tank of the utility model;

[0020] Figure 5 It is a cross-sectional schematic diagram of the hot water storage tank of the utility model.

[0021] Description of the numbers in the figure:

[0022] 1. Stove; 2. Water storage tank; 3. Hot water storage mechanism; 4. Boiler thermal power generation mechanism; 5. Steam pipe; 6. Heat exchange annular pipe; 7. Water outlet pipe; 8. Drain hose; 9. First piston plate; 10. Slide rod; 11. Condensate storage tank; 12. Water supply pipe; 13. Check valve; 14. Pumping pipe; 15. One-way valve; 16. Hot water storage tank; 17. Insulation cotton; 18. Drain valve; 19. Screw; 20. Second piston plate; 21. Knob; 22. Exhaust pipe; 23. Stove; 24. Partition; 25. Exhaust hole; 26. Impeller; 27. Generator; 28. Air vent; 29. ​​Filter; 30. Plug. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Example:

[0027] See also Figure 1-5A coal-fired boiler heat recovery and utilization device comprises a furnace 1 and a water tank 2. A hot water storage mechanism 3 is arranged on the side of the furnace 1. Two slide bars 10 are movably sleeved in the inner cavity of the water tank 2. The top ends of the two slide bars 10 are fixedly connected to a first piston plate 9. The bottom ends of the slide bars 10 are movably sleeved to the bottom of the water tank 2 and are fixedly connected to a condensed water storage tank 11. A boiler heat power generation mechanism 4 is arranged on the furnace 1. A steam guide pipe 5 is arranged on the side of the boiler heat power generation mechanism 4. The end of the steam guide pipe 5 is fixedly sleeved on the inner cavity of the water storage tank 2 and is fixedly connected to the heat exchange annular pipe 6, the side of the heat exchange annular pipe 6 is fixedly connected to the water outlet pipe 7, the end of the water outlet pipe 7 is fixedly sleeved on the outside of the water storage tank 2 and is fixedly connected to a drain hose 8, the end of the drain hose 8 extends to the inner cavity of the condensate storage tank 11, the side of the water storage tank 2 is fixedly sleeved with a water filling pipe 12, the end of the water filling pipe 12 is fixedly sleeved on the inner cavity of the furnace table 1 and is fixedly installed with a check valve 13.

[0028] In this embodiment, the check valve 13 can only guide the water in the water tank 2 into the inner cavity of the furnace table 1. A supporting leg is provided at the lower part of the water tank 2 to support the water tank 2. In addition, a sealing ring is provided between the slide rod 10 and the water tank 2 to ensure the sealing between the slide rod 10 and the water tank 2.

[0029] For details, please refer to Figure 1 , Figure 2 and Figure 5 The hot water storage mechanism 3 includes a water pumping pipe 14 fixedly sleeved on the side of the stove top 1, a one-way valve 15 is fixedly installed on the end of the water pumping pipe 14, a hot water storage tank 16 is fixedly sleeved on the end of the one-way valve 15, a screw 19 is threadedly sleeved on the outer side of the hot water storage tank 16, one end of the screw 19 extends to the inner cavity of the hot water storage tank 16 and is rotatably connected to a second piston plate 20, the side of the second piston plate 20 is in contact with the inner wall of the hot water storage tank 16, the other end of the screw 19 extends to the outside of the hot water storage tank 16 and is fixedly connected to a knob 21, the outer sides of the hot water storage tank 16 and the condensed water storage tank 11 are both sleeved with thermal insulation cotton 17, and the outer sides of the hot water storage tank 16 and the condensed water storage tank 11 are respectively fixedly installed with drain valves 18.

[0030] In this embodiment, the one-way valve 15 can only allow the hot water in the stove 1 to enter the hot water storage tank 16, preventing the water in the hot water storage tank 16 from flowing back. In addition, the inner wall of the hot water storage tank 16 is used to limit the second piston plate 20, so that the second piston plate 20 can only move along the axial direction of the screw 19.

[0031] For details, please refer to Figure 1 and Figure 3The boiler thermal energy power generation mechanism 4 includes a stove 23 arranged in the inner cavity of the furnace 1 and an exhaust pipe 22 fixedly sleeved on the top of the furnace 1, the inner cavity of the exhaust pipe 22 is rotatably connected with an impeller 26, and a generator 27 is fixedly installed on the back of the exhaust pipe 22, and the rotating shaft of the generator 27 is connected to the rotating shaft of the impeller 26. A partition 24 is fixedly sleeved on the side of the top of the stove 23, and the outer side of the partition 24 is connected to the inner wall of the furnace 1. A plurality of exhaust holes 25 are opened on the top surface of the partition 24, and the end of the steam guide pipe 5 is fixedly sleeved to the side of the exhaust pipe 22.

[0032] For details, please refer to Figure 1 , Figure 2 and Figure 4 The top surfaces of the water storage tank 2 and the condensed water storage tank 11 and the side surfaces of the hot water storage tank 16 are respectively provided with air holes 28, and the inner cavities of the air holes 28 are respectively provided with filter screens 29.

[0033] In this embodiment, the air holes 28 on the top surface of the water tank 2 are used to prevent negative pressure from being generated in the upper part of the inner cavity of the water tank 2 and affecting the movement of the first piston plate 9. The air holes 28 on the side of the hot water storage tank 16 are used to prevent negative pressure from being generated on one side of the inner cavity of the hot water storage tank 16 and affecting the movement of the second piston plate 20. The gas in the condensate water storage tank 11 is discharged through the air holes 28 on the top surface of the condensate water storage tank 11.

[0034] For details, please refer to Figure 4 , the side surface of the first piston plate 9 is in contact with the inner wall of the water tank 2 .

[0035] In this embodiment, the fit between the side surface of the first piston plate 9 and the inner wall of the water tank 2 ensures that the first piston plate 9 can completely squeeze the water below the inner cavity of the water tank 2, while ensuring that the water below the inner cavity of the water tank 2 will not pass through the first piston plate 9 and enter the upper part of the inner cavity of the water tank 2.

[0036] For details, please refer to Figure 3 and Figure 4 The sides of the furnace table 1 and the water storage tank 2 are respectively threadedly installed with screw plugs 30.

[0037] In this embodiment, water is added to the stove top 1 and the water tank 2 by removing the screw plugs 30 on the sides of the stove top 1 and the water tank 2 .

[0038] Working principle: When in use, first remove the screw plugs 30 on the sides of the stove 1 and the water storage tank 2 respectively, inject water into the lower part of the inner cavity of the stove 1 and the water storage tank 2 respectively, put coal into the stove 23, ignite the coal to generate heat, and the heat outside the stove 23 heats the water in the inner cavity of the stove 1, and the water in the inner cavity of the stove 1 is heated to generate water vapor, and the water vapor enters the exhaust pipe 22 through the exhaust hole 25, and then drives the impeller 26 to rotate through the water vapor in the exhaust pipe 22, and uses the impeller 26 to drive the generator 27 to generate electricity, and at the same time, the water vapor at the top of the exhaust pipe 22 enters the heat exchange annular pipe 6 from the steam guide pipe 5. At this time, the water vapor in the heat exchange annular pipe 6 exchanges heat with the water in the water storage tank 2, so that the water vapor is cooled and turned into water, and the water is stored in the condensate storage tank 11 from the outlet pipe 7 and the drain hose 8. At the same time, the thermal insulation cotton 17 on the outside of the condensate storage tank 11 keeps the water in the condensate storage tank 11 warm, and then in the condensate storage tank 11 When the water in the furnace gradually increases, the gravity of the condensed water storage tank 11 increases and moves it downward. The condensed water storage tank 11 drives the sliding rod 10 and the first piston plate 9 to move downward. At this time, the first piston plate 9 squeezes the water in the lower part of the inner cavity of the water storage tank 2 and adds it into the furnace 1 through the water adding pipe 12 and the check valve 13, so as to automatically replenish the water evaporated in the furnace 1. Finally, when the coal is no longer burning, the knob 21 is turned to drive the screw 19 to rotate, and the threaded cooperation between the screw 19 and the hot water storage tank 16 drives the second piston plate 20 to move to the side away from the furnace 1, and the negative pressure on one side of the inner cavity of the hot water storage tank 16 is used to make the check valve 15 and the water pumping pipe 14 generate suction, so that the hot water in the inner cavity of the furnace 1 is introduced into the inner cavity of the hot water storage tank 16 for storage, and the heat preservation cotton 17 on the outside of the hot water storage tank 16 is used to insulate the water in the hot water storage tank 16, and the water can be discharged for use through the condensed water storage tank 11 and the drain valve 18 on the outside of the hot water storage tank 16.

[0039] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A coal-fired boiler heat recovery and utilization device, comprising a furnace (1) and a water storage tank (2), characterized in that: A hot water storage mechanism (3) is arranged on the side of the furnace (1); two slide bars (10) are movably sleeved in the inner cavity of the water storage tank (2); the top ends of the two slide bars (10) are fixedly connected to a first piston plate (9); the bottom ends of the slide bars (10) are movably sleeved to the bottom of the water storage tank (2) and are fixedly connected to a condensate storage tank (11); a boiler thermal energy power generation mechanism (4) is arranged on the furnace (1); a steam guide pipe (5) is arranged on the side of the boiler thermal energy power generation mechanism (4); the end of the steam guide pipe (5) is fixedly sleeved to A heat exchange annular tube (6) is fixedly connected to the inner cavity of the water storage tank (2), a water outlet pipe (7) is fixedly connected to the side of the heat exchange annular tube (6), an end of the water outlet pipe (7) is fixedly sleeved to the outside of the water storage tank (2) and is fixedly connected to a drain hose (8), an end of the drain hose (8) extends to the inner cavity of the condensate storage tank (11), a water filling pipe (12) is fixedly sleeved on the side of the water storage tank (2), an end of the water filling pipe (12) is fixedly sleeved to the inner cavity of the furnace table (1) and a check valve (13) is fixedly installed.

2. A coal-fired boiler heat recovery and utilization device according to claim 1, characterized in that: The hot water storage mechanism (3) comprises a water pumping pipe (14) fixedly sleeved on the side of the stove (1), a one-way valve (15) fixedly installed at the end of the water pumping pipe (14), a hot water storage tank (16) fixedly sleeved at the end of the one-way valve (15), a screw (19) threadedly sleeved on the outer side of the hot water storage tank (16), one end of the screw (19) extending to the inner cavity of the hot water storage tank (16) and rotatably connected to a second piston plate (20), the side surface of the second piston plate (20) and the inner wall of the hot water storage tank (16) are in contact, the other end of the screw (19) extends to the outside of the hot water storage tank (16) and is fixedly connected to a knob (21), the outer sides of the hot water storage tank (16) and the condensed water storage tank (11) are both sleeved with thermal insulation cotton (17), and the outer sides of the hot water storage tank (16) and the condensed water storage tank (11) are respectively fixedly installed with drain valves (18).

3. A coal-fired boiler heat recovery and utilization device according to claim 1, characterized in that: The boiler thermal energy power generation mechanism (4) comprises a stove (23) arranged in the inner cavity of a furnace (1) and an exhaust pipe (22) fixedly sleeved on the top of the furnace (1); the inner cavity of the exhaust pipe (22) is rotatably connected to an impeller (26); a generator (27) is fixedly installed on the back of the exhaust pipe (22); the rotating shaft of the generator (27) is connected to the rotating shaft of the impeller (26); a partition (24) is fixedly sleeved on the side of the top of the stove (23); the outer side of the partition (24) is connected to the inner wall of the furnace (1); a plurality of exhaust holes (25) are opened on the top surface of the partition (24); and the end of the steam guide pipe (5) is fixedly sleeved to the side of the exhaust pipe (22).

4. A coal-fired boiler heat recovery and utilization device according to claim 1, characterized in that: The top surfaces of the water storage tank (2) and the condensed water storage tank (11) and the side surfaces of the hot water storage tank (16) are respectively provided with air holes (28), and the inner cavities of the air holes (28) are respectively provided with filter screens (29).

5. The coal-fired boiler heat recovery and utilization device according to claim 1, characterized in that: The side surface of the first piston plate (9) is in contact with the inner wall of the water storage tank (2).

6. A coal-fired boiler heat recovery and utilization device according to claim 3, characterized in that: The sides of the furnace table (1) and the water storage tank (2) are respectively threadedly mounted with screw plugs (30).

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