Waste heat recovery device for boiler for building construction

Abstract

According to the technical scheme, the waste heat recovery device for the boiler for building construction is characterized in that the waste heat recovery device comprises a flue gas waste heat boiler body, and a conduction box is arranged on one side of the flue gas waste heat boiler body; the recycling assembly is arranged on one side of the conduction box and used for recycling high-temperature flue gas, the recycling assembly comprises a connecting hole, the connecting hole is formed in one side of the conduction box, the connecting hole is fixedly connected with a flue gas outlet of the flue gas waste heat boiler body in a sleeving mode, a mounting hole is formed in one side of the conduction box, and the mounting hole is fixedly connected with the flue gas outlet of the flue gas waste heat boiler body in a sleeving mode. According to the flue gas waste heat boiler, the flue gas waste heat boiler body, the conduction box, the connecting hole, the mounting hole, the flue gas guide pipe, the fixing hole, the heating pipe, the flue gas inlet hole, the flow dividing hole, the heating rod and the flue gas inlet groove are used in cooperation, so that high-temperature flue gas to be discharged can be reused conveniently, and cold water just entering the flue gas waste heat boiler body can be heated in an auxiliary mode; and the use effect of the flue gas waste heat boiler body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat boilers, and in particular to a waste heat recovery device for a boiler used in building construction. Background Art

[0002] During the construction process, the boiler may be needed to provide the workers with the daily heat source for boiling water and cooking. Boiler waste heat recovery is to recycle the wasted heat energy. It is one of the most direct and economical means to improve energy utilization, reduce production costs and protect the environment. The boiler exhaust temperature directly affects the economy of the boiler unit and the safety of the rear heating surface. Choosing a lower exhaust temperature can reduce the boiler's exhaust loss, which is beneficial to improving the boiler's thermal efficiency, saving energy and boiler operating costs. However, the reduction in exhaust temperature reduces the heat transfer temperature and pressure of the flue gas and the working fluid in the rear heating surface, increases the heat transfer area, and increases metal consumption and initial equipment investment.

[0003] For example, the Chinese patent with publication number CN217715008U proposes a waste heat recovery device for boiler equipment. The patent sets heat-conducting fins on the heat-conducting pipe, so that the contact area between the heat-conducting pipe and the exhaust gas in the heat exchange cylinder is larger and the heat-conducting effect is better. By extending the heat-conducting pipe into the water storage tank, the heat-conducting pipe can not only heat the liquid flowing through the heat-conducting pipe, but also heat the liquid in the water storage tank, thereby further improving the heat-conducting effect of the heat-conducting pipe; the flow-limiting component on the heat-conducting pipe can not only reduce the liquid flow rate in the heat-conducting pipe, but also avoid a large amount of liquid in the water storage tank from flowing back to the heat-conducting pipe, which is conducive to ensuring the overall heating effect of the waste heat recovery device. However, in this scheme, since a waste heat boiler may usually be used when recycling the flue gas, and the flue gas will be directly discharged after being heated in the waste heat boiler, the discharged flue gas may still contain heat at this time, thereby possibly reducing the recovery effect of the flue gas by the waste heat boiler.

[0004] For example, the Chinese patent with publication number CN215766614U proposes a flue gas waste heat recovery device for a boiler. The patent uses a designed waste heat recovery mechanism to pass the flue gas into a spiral tube, so that the internal movable block moves, thereby driving the magnet block to move, and then driving the fixed disk to rotate, so that the stirring rod arranged on the fixed disk can stir the water in the main box, fully absorb the waste heat in the flue gas, and the overall water temperature rises more evenly, the utilization effect is better, and after rising to the set temperature, hot water can be continuously output, further improving the utilization effect. However, in this scheme, since a waste heat boiler may usually be used when recycling the flue gas, and the flue gas will be directly discharged after being heated in the waste heat boiler, the discharged flue gas may still contain heat at this time, which may reduce the recovery and utilization effect of the flue gas by the waste heat boiler. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a waste heat recovery device for boilers used in construction, which solves the problem that when recycling flue gas, a waste heat boiler may usually be used, and the flue gas will be directly discharged after being heated in the waste heat boiler. At this time, the discharged flue gas may still contain heat, which may reduce the recycling effect of the flue gas by the waste heat boiler.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A waste heat recovery device for a boiler used in construction, comprising a flue gas waste heat boiler body, a conduction box is arranged on one side of the flue gas waste heat boiler body; a recycling component is arranged on one side of the conduction box and is used to reuse high-temperature flue gas, the recycling component comprising: a connecting hole, the connecting hole is arranged on one side of the conduction box, the connecting hole is fixedly sleeved with a smoke outlet of the flue gas waste heat boiler body, a mounting hole is arranged on one side of the conduction box, a smoke guide pipe is arranged on one side of the flue gas waste heat boiler body, the smoke guide pipe is fixedly sleeved with the mounting hole, a fixing hole is arranged on the outer circular wall surface of the flue gas waste heat boiler body, the smoke guide pipe is fixedly sleeved with the fixing hole, a heating pipe is fixedly installed inside the flue gas waste heat boiler body, a smoke inlet hole is arranged on the outer circular wall surface of the heating pipe, the smoke guide pipe is fixedly sleeved with the smoke inlet hole, a plurality of diversion holes are arranged on the outer circular wall surface of the heating pipe, a heating rod is fixedly sleeved on the inner circular wall surface of the diversion hole, and a smoke inlet groove is arranged at one end of the heating rod.

[0008] In order to cool down the flue gas entering the cooling box, as a waste heat recovery device for a boiler used in construction of the utility model, preferably, a restriction hole is opened at one end of the flue gas waste heat boiler body, and a smoke outlet pipe is fixedly sleeved on the inner circular wall surface of the restriction hole, a circular through hole is opened at one end of the heating pipe, and the smoke outlet pipe is fixedly sleeved on the inner circular wall surface of the circular through hole, a cooling box is arranged on one side of the flue gas waste heat boiler body, a circular through hole is opened on the top surface of the cooling box, and the smoke outlet pipe is fixedly sleeved on the circular through hole, and the A water storage tank is fixedly installed on the top surface of the cooling box, a micro submersible pump is arranged inside the water storage tank, a water outlet pipe is fixedly sleeved on the outer circular wall of the water outlet of the micro submersible pump, a circular through hole is provided on the bottom surface of the water storage tank, the water outlet pipe is fixedly sleeved on the circular through hole, a positioning hole is provided on the top surface of the cooling box, an atomizing nozzle is fixedly sleeved on the inner circular wall of the positioning hole, the atomizing nozzle is fixedly sleeved on the water outlet pipe, a PLC controller is fixedly installed on one side of the cooling box, and the PLC controller is electrically connected to the micro submersible pump.

[0009] In order to perform simple desulfurization before flue gas is discharged, as a waste heat recovery device for a boiler used in construction of the utility model, it is preferred that a limiting hole is opened on one side of the cooling box, a desulfurization box is fixedly installed on one side of the cooling box, a circular through hole is opened on one side of the desulfurization box, a flue pipe is fixedly sleeved on the inner circular wall of the circular through hole, the flue pipe is fixedly sleeved with the limiting hole, a smoke exhaust hole is opened on one side of the desulfurization box, and a smoke exhaust pipe is fixedly installed on one side of the desulfurization box.

[0010] In order to discharge the water or dust accumulated inside the cooling box, as a waste heat recovery device for a boiler used in construction of the utility model, it is preferred that a drainage hole is opened on one side of the cooling box, the inner circular wall surface of the drainage hole is opened with a thread, the inner circular wall surface of the drainage hole is threadedly connected with a sealing column, and the outer circular wall surface of the sealing column is opened with a thread.

[0011] In order to fill water into the water storage tank, as a waste heat recovery device for a boiler used in construction of the utility model, preferably, a water injection hole is opened on the top surface of the water storage tank.

[0012] In order to put the desulfurizer into the desulfurization box, as a waste heat recovery device for a boiler used in construction of the utility model, it is preferred that a delivery hole is provided on the top surface of the desulfurization box, the inner circular wall surface of the delivery hole is threaded, the inner circular wall surface of the delivery hole is threadedly connected with a sealing block, and the outer circular wall surface of the sealing block is threaded.

[0013] In order to power the PLC controller and the micro submersible pump, as a waste heat recovery device for a boiler used in construction of the utility model, preferably, a battery is fixedly installed on one side of the water tank, and the battery is electrically connected to the PLC controller, and the battery is electrically connected to the micro submersible pump.

[0014] In summary, the utility model mainly has the following beneficial effects:

[0015] The flue gas waste heat boiler body, conduction box, connection holes, mounting holes, smoke guide pipe, fixing holes, heating pipe, smoke inlet holes, diversion holes, heating rods and smoke inlet grooves are used in coordination with each other, so as to facilitate the reuse of the high-temperature flue gas to be discharged, so as to assist in heating the cold water just entering the flue gas waste heat boiler body, thereby improving the use effect of the flue gas waste heat boiler body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the conduction box structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the heating tube structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the heating rod structure of the utility model;

[0020] Figure 5 It is a schematic diagram of the cooling box structure of the utility model;

[0021] Figure 6 It is a schematic diagram of the water storage tank structure of the utility model;

[0022] Figure 7 It is a schematic diagram of the structure of the desulfurization box of the utility model.

[0023] Figure numerals: 1. flue gas waste heat boiler body; 2. conduction box; 3. connection hole; 4. installation hole; 5. smoke guide pipe; 6. fixing hole; 7. heating pipe; 8. smoke inlet hole; 9. diversion hole; 10. heating rod; 11. smoke inlet groove; 12. release hole; 13. restriction hole; 14. smoke outlet pipe; 15. cooling box; 16. water injection hole; 17. water storage tank; 18. micro submersible pump; 19. water outlet pipe; 20. sealing block; 21. positioning hole; 22. atomizing nozzle; 23. limiting hole; 24. desulfurization box; 25. battery; 26. flue pipe; 27. smoke exhaust hole; 28. smoke exhaust pipe; 29. ​​drainage hole; 30. sealing column. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions 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.

[0025] Embodiment 1

[0026] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6A waste heat recovery device for a boiler used in construction includes a flue gas waste heat boiler body 1, a conduction box 2 is arranged on one side of the flue gas waste heat boiler body 1, a recycling component is arranged on one side of the conduction box 2 for recycling high-temperature flue gas, the recycling component includes a connecting hole 3, the connecting hole 3 is opened on one side of the conduction box 2, the connecting hole 3 is fixedly connected with the smoke outlet of the flue gas waste heat boiler body 1, a mounting hole 4 is opened on one side of the conduction box 2, and a reusing component is arranged on one side of the flue gas waste heat boiler body 1 for recycling high-temperature flue gas. A smoke guide pipe 5 is provided, and the smoke guide pipe 5 is fixedly sleeved with the mounting hole 4. A fixing hole 6 is provided on the outer circumferential wall surface of the flue gas waste heat boiler body 1. The smoke guide pipe 5 is fixedly sleeved with the fixing hole 6. A heating pipe 7 is fixedly installed inside the flue gas waste heat boiler body 1. A smoke inlet hole 8 is provided on the outer circumferential wall surface of the heating pipe 7. The smoke guide pipe 5 is fixedly sleeved with the smoke inlet hole 8. A plurality of diversion holes 9 are provided on the outer circumferential wall surface of the heating pipe 7. A heating rod 10 is fixedly sleeved with the inner circumferential wall surface of the diversion hole 9. A smoke inlet groove 1 is provided at one end of the heating rod 10. 1. Through the provided conduction box 2, when the staff uses the flue gas waste heat boiler body 1 to recycle the flue gas waste heat, the high-temperature flue gas can heat the water in the flue gas waste heat boiler body 1. After the high-temperature flue gas passes through the interior of the flue gas waste heat boiler body 1, it will enter the interior of the conduction box 2, and then the high-temperature flue gas will enter the interior of the smoke guide pipe 5 through the mounting hole 4, and then the high-temperature flue gas will enter the interior of the heating pipe 7 through the smoke guide pipe 5, and then the flue gas will fill the interior of the heating pipe 7 and the smoke inlet groove 11, and then the temperature of the heating pipe 7 and the heating rod 10 can be increased. Since the heating pipe 7 and the plurality of heating rods 10 are all immersed in water in the water tank of the flue gas waste heat boiler body 1, when the high-temperature flue gas heats the heating pipe 7 and the heating rod 10, the water can be gradually heated in the water, so as to facilitate the reuse of the high-temperature flue gas to be discharged, so as to assist in heating the cold water that has just entered the interior of the flue gas waste heat boiler body 1, and improve the use effect of the flue gas waste heat boiler body 1.

[0027] Embodiment 2

[0028] Based on the above embodiment 1, reference Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6A limiting hole 13 is provided at one end of the flue gas waste heat boiler body 1, and a smoke outlet pipe 14 is fixedly sleeved on the inner circular wall of the limiting hole 13. A circular through hole is provided at one end of the heating tube 7, and the smoke outlet pipe 14 is fixedly sleeved on the inner circular wall of the circular through hole. A cooling box 15 is provided on one side of the flue gas waste heat boiler body 1, and a circular through hole is provided on the top surface of the cooling box 15, and the smoke outlet pipe 14 is fixedly sleeved on the circular through hole. A water storage tank 17 is fixedly installed on the top surface of the cooling box 15, and a micro submersible pump 18 is provided inside the water storage tank 17, and a water outlet pipe 19 is fixedly sleeved on the outer circular wall of the water outlet of the micro submersible pump 18. A circular through hole is provided on the bottom surface of the water storage tank 17, and the water outlet pipe 19 is fixedly sleeved on the circular through hole. A positioning hole 21 is provided on the top surface of the cooling box 15, and the inner circular wall of the positioning hole 21 An atomizing nozzle 22 is fixedly connected, and the atomizing nozzle 22 is fixedly connected to the water outlet pipe 19. A PLC controller is fixedly installed on one side of the cooling box 15. The PLC controller is electrically connected to the micro submersible pump 18. Through the water storage tank 17, the staff puts water into the water storage tank 17. When the high-temperature flue gas heats the heating tube 7 and the heating rod 10, it will enter the cooling box 15 through the smoke outlet pipe 14. Then the staff starts the micro submersible pump 18 by using the PLC controller. The micro submersible pump 18 will spray the water in the water storage tank 17 into the cooling box 15 through the water outlet pipe 19 and the atomizing nozzle 22, thereby facilitating the cooling of the flue gas entering the cooling box 15, and at the same time, it can reduce the fly ash or particulate dust in the flue gas.

[0029] Embodiment 3

[0030] Based on the above embodiment 1 or 2, refer to Figure 1 , Figure 5 , Figure 6 and Figure 7A limiting hole 23 is provided on one side of the cooling box 15, a desulfurization box 24 is fixedly installed on one side of the cooling box 15, a circular through hole is provided on one side of the desulfurization box 24, a flue pipe 26 is fixedly sleeved on the inner wall of the circular through hole, the flue pipe 26 is fixedly sleeved with the limiting hole 23, a smoke exhaust hole 27 is provided on one side of the desulfurization box 24, a smoke exhaust pipe 28 is fixedly installed on one side of the desulfurization box 24, through the set desulfurization box 24, the staff puts the desulfurization agent inside the desulfurization box 24, when the flue gas is sprayed inside the cooling box 15, it will enter the inside of the desulfurization box 24 through the flue pipe 26, and then pass through the desulfurization agent, so as to facilitate the simple desulfurization of the flue gas before it is discharged. A drainage hole 29 is provided on one side of the desulfurization and cooling box 15, and a thread is provided on the inner circumferential wall of the drainage hole 29, and a sealing column 30 is threadedly connected to the inner circumferential wall of the drainage hole 29, and a thread is provided on the outer circumferential wall of the sealing column 30. A water injection hole 16 is provided on the top surface of the water storage tank 17, and a delivery hole 12 is provided on the top surface of the desulfurization box 24, and a thread is provided on the inner circumferential wall of the delivery hole 12, and a sealing block 20 is threadedly connected to the inner circumferential wall of the delivery hole 12, and a thread is provided on the outer circumferential wall of the sealing block 20. A battery 25 is fixedly installed on one side of the water storage tank 17, and the battery 25 is electrically connected to the PLC controller, and the battery 25 is electrically connected to the micro submersible pump 18.

[0031] Working principle: Please refer to Figure 1-Figure 7 As shown, through the set conduction box 2, when the staff uses the flue gas waste heat boiler body 1 to recycle the flue gas waste heat, the high-temperature flue gas can heat the water in the flue gas waste heat boiler body 1. When the high-temperature flue gas passes through the interior of the flue gas waste heat boiler body 1, it will enter the interior of the conduction box 2, and then the high-temperature flue gas will enter the interior of the smoke guide pipe 5 through the mounting hole 4, and then the high-temperature flue gas will enter the interior of the heating pipe 7 through the smoke guide pipe 5, and then the flue gas will fill the interior of the heating pipe 7 and the smoke inlet groove 11, and then the temperature of the heating pipe 7 and the heating rod 10 can be increased. Since the heating pipe 7 and multiple heating rods 10 are all immersed in water in the water tank of the flue gas waste heat boiler body 1, when the high-temperature flue gas heats the heating pipe 7 and the heating rod 10, the water can be gradually heated in the water, so as to facilitate the reuse of the high-temperature flue gas to be discharged, so as to assist in heating the cold water that has just entered the interior of the flue gas waste heat boiler body 1, thereby improving the use effect of the flue gas waste heat boiler body 1.

[0032] By setting up a water storage tank 17, the staff puts water into the water storage tank 17. When the high-temperature flue gas heats the heating tube 7 and the heating rod 10, it will enter the cooling box 15 through the smoke outlet pipe 14. Then the staff starts the micro submersible pump 18 by using the PLC controller. The micro submersible pump 18 will atomize the water in the water storage tank 17 through the water outlet pipe 19 and the atomizing nozzle 22 and spray it into the cooling box 15, thereby facilitating the cooling of the flue gas entering the cooling box 15, and dust reduction of fly ash or particulate dust in the flue gas.

[0033] Through the desulfurization box 24, the staff puts the desulfurizer inside the desulfurization box 24. After the flue gas is sprayed inside the cooling box 15, it will enter the desulfurization box 24 through the flue pipe 26, and then pass through the desulfurizer, so as to facilitate simple desulfurization of the flue gas before it is discharged.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for a boiler used in construction, characterized in that: include: A flue gas waste heat boiler body (1), wherein a conduction box (2) is provided on one side of the flue gas waste heat boiler body (1); A recycling component is arranged on one side of the conduction box (2) and is used to recycle high-temperature flue gas. The recycling component comprises: a connection hole (3), the connection hole (3) is opened on one side of the conduction box (2), the connection hole (3) is fixedly sleeved with the smoke outlet of the flue gas waste heat boiler body (1), a mounting hole (4) is opened on one side of the conduction box (2), a smoke guide pipe (5) is arranged on one side of the flue gas waste heat boiler body (1), the smoke guide pipe (5) is fixedly sleeved with the mounting hole (4), and the flue gas waste heat boiler body The outer circular wall surface of the boiler (1) is provided with a fixing hole (6), the smoke guide pipe (5) is fixedly sleeved with the fixing hole (6), a heating pipe (7) is fixedly installed inside the flue gas waste heat boiler body (1), the outer circular wall surface of the heating pipe (7) is provided with a smoke inlet hole (8), the smoke guide pipe (5) is fixedly sleeved with the smoke inlet hole (8), the outer circular wall surface of the heating pipe (7) is provided with a plurality of diversion holes (9), the inner circular wall surface of the diversion hole (9) is fixedly sleeved with a heating rod (10), and one end of the heating rod (10) is provided with a smoke inlet groove (11).

2. The waste heat recovery device for a boiler used in construction according to claim 1, characterized in that: A limiting hole (13) is provided at one end of the flue gas waste heat boiler body (1), and a smoke outlet pipe (14) is fixedly sleeved on the inner circular wall surface of the limiting hole (13); a circular through hole is provided at one end of the heating tube (7), and the smoke outlet pipe (14) is fixedly sleeved on the inner circular wall surface of the circular through hole; a cooling box (15) is provided on one side of the flue gas waste heat boiler body (1), and a circular through hole is provided on the top surface of the cooling box (15), and the smoke outlet pipe (14) is fixedly sleeved on the circular through hole; a water storage tank (17) is fixedly installed on the top surface of the cooling box (15), and a water storage tank (17) is provided inside the water storage tank (17). A micro submersible pump (18), wherein the outer circular wall surface of the water outlet of the micro submersible pump (18) is fixedly sleeved with a water outlet pipe (19), the bottom surface of the water storage tank (17) is provided with a circular through hole, the water outlet pipe (19) is fixedly sleeved with the circular through hole, the top surface of the cooling box (15) is provided with a positioning hole (21), the inner circular wall surface of the positioning hole (21) is fixedly sleeved with an atomizing nozzle (22), the atomizing nozzle (22) is fixedly sleeved with the water outlet pipe (19), and a PLC controller is fixedly installed on one side of the cooling box (15), and the PLC controller is electrically connected to the micro submersible pump (18).

3. The waste heat recovery device for a boiler used in construction according to claim 2, characterized in that: A limiting hole (23) is provided on one side of the cooling box (15); a desulfurization box (24) is fixedly installed on one side of the cooling box (15); a circular through hole is provided on one side of the desulfurization box (24); a flue pipe (26) is fixedly sleeved on the inner wall of the circular through hole; the flue pipe (26) is fixedly sleeved with the limiting hole (23); a smoke exhaust hole (27) is provided on one side of the desulfurization box (24); and a smoke exhaust pipe (28) is fixedly installed on one side of the desulfurization box (24).

4. The waste heat recovery device for a boiler used in construction according to claim 2, characterized in that: A drainage hole (29) is provided on one side of the cooling box (15), the inner circumferential wall surface of the drainage hole (29) is provided with a thread, the inner circumferential wall surface of the drainage hole (29) is threadedly connected to a sealing column (30), and the outer circumferential wall surface of the sealing column (30) is provided with a thread.

5. The waste heat recovery device for a boiler used in construction according to claim 2, characterized in that: A water injection hole (16) is provided on the top surface of the water storage tank (17).

6. The waste heat recovery device for boilers used in construction according to claim 3, characterized in that: The top surface of the desulfurization box (24) is provided with a delivery hole (12), the inner circumferential wall surface of the delivery hole (12) is provided with a thread, the inner circumferential wall surface of the delivery hole (12) is threadedly connected to a sealing block (20), and the outer circumferential wall surface of the sealing block (20) is provided with a thread.

7. The waste heat recovery device for a boiler used in construction according to claim 2, characterized in that: A storage battery (25) is fixedly mounted on one side of the water storage tank (17); the storage battery (25) is electrically connected to the PLC controller; and the storage battery (25) is electrically connected to the micro submersible pump (18).

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