Efficient boiler waste heat recovery device with heat exchanger

Abstract

The utility model is suitable for the technical field of boiler waste heat efficient recovery, and provides a boiler waste heat efficient recovery device with a heat exchanger. The lower shell is arranged at the bottom of the upper shell; the water collecting tank is fixedly mounted at the bottom of the lower shell; the rectangular opening is formed in the bottom of the lower shell; the smoke inlet pipe and the smoke exhaust pipe are arranged on the two sides of the upper shell respectively; the water heating medium heat exchange mechanism is mounted on the upper shell and is used for recovering waste heat of a boiler; and the opening and closing control mechanism is arranged on the upper shell and is used for controlling the opening and closing of the upper shell and the lower shell. According to the efficient boiler waste heat recovery device with the heat exchanger, boiler waste heat can be efficiently recycled through the hydrothermal medium technology, the heat exchange pipes can be conveniently cleaned, overhauled and maintained, operation is convenient, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of efficient recovery of boiler waste heat, and particularly relates to a device for efficiently recovering boiler waste heat with a heat exchanger. Background Art

[0002] Boiler waste heat recovery is an important energy-saving technology aimed at improving energy utilization efficiency and reducing energy consumption. During the operation of a boiler, a large amount of waste heat is generated, which mainly comes from the exhaust gas produced by fuel combustion and the boiler flue gas. If this waste heat can be effectively recovered and reused, it will significantly improve the energy utilization efficiency of the boiler system, reduce the enterprise's energy costs, and reduce the impact on the environment.

[0003] However, the existing devices for efficiently recovering boiler waste heat with heat exchangers are often of an integrated structure, which is not convenient for cleaning and maintenance of the heat exchange tubes, and is rather inconvenient. Summary of the Utility Model

[0004] The utility model provides a device for efficiently recovering boiler waste heat with a heat exchanger, aiming to solve the problem that the existing devices for efficiently recovering boiler waste heat with heat exchangers are not convenient for cleaning and maintenance of the heat exchange tubes as mentioned in the above background art.

[0005] To solve the above problems, the utility model is realized as follows. A device for efficiently recovering boiler waste heat with a heat exchanger includes: an upper housing; a lower housing disposed at the bottom of the upper housing, and the lower housing and the upper housing are combined to form a closed shell-shaped space; a water collecting tank fixedly installed at the bottom of the lower housing; a rectangular opening formed at the bottom of the lower housing and located within the water collecting tank; a smoke inlet pipe and a smoke exhaust pipe respectively communicated with both sides of the shell-shaped space; a water heat medium heat exchange mechanism installed on the upper housing, and the water heat medium heat exchange mechanism is used for recovering boiler waste heat; an opening and closing control mechanism installed on the upper housing, and the opening and closing control mechanism is used for controlling the opening and closing of the upper housing and the lower housing; a cleaning mechanism disposed on the upper housing, and the cleaning mechanism is used for cleaning the water heat medium heat exchange mechanism.

[0006] Preferably, the smoke inlet pipe and the smoke exhaust pipe are respectively clamped and connected to both sides of the upper housing through U-shaped positioning plates, and the U-shaped positioning plates connect the smoke inlet pipe, the upper housing, and the smoke exhaust pipe into an integral body through bolts. A top shell is fixedly installed at the top of the upper housing.

[0007] Preferably, the hydrothermal medium heat exchange mechanism includes: a heat exchange tube fixedly installed on the inner wall of the upper housing and extending downward into the lower housing, the heat exchange tube being distributed in an S shape within the shell-type space, and both ends of the heat exchange tube being located outside the top of the upper housing; two three-way tubes respectively arranged at both ends of the heat exchange tube; two circulation tubes respectively connected to the two three-way tubes; a water outlet pipe and a water inlet pipe respectively arranged on the two three-way tubes; and two one-way valves respectively arranged on the water outlet pipe and the water inlet pipe.

[0008] Preferably, the opening and closing control mechanism includes: two connecting plates fixedly installed on both sides of the upper housing; two screw rods respectively rotatably installed on the two connecting plates; a sliding plate with one end threadedly sleeved on the screw rod and the other end fixedly connected to the outside of the lower housing; two limiting blocks respectively fixedly installed at the bottom ends of the two screw rods; a servo motor fixedly installed on the top of the upper housing; two double-groove synchronous pulleys respectively fixedly sleeved on the output shaft of the servo motor and the top ends of the two screw rods; and the two double-groove synchronous pulleys on the output shaft of the servo motor and the two double-groove synchronous pulleys at the top ends of the two screw rods are respectively connected by two synchronous belts for transmission.

[0009] Preferably, the cleaning mechanism includes: a serpentine tube fixedly installed on the inner wall of the top of the upper housing; a plurality of nozzles arranged on the serpentine tube; a booster pump fixedly installed on the top of the top shell; a connecting pipe arranged at the water outlet end of the booster pump and communicating with the serpentine tube; a water suction pipe arranged at the water inlet end of the booster pump; and an electromagnetic valve arranged on the water suction pipe.

[0010] Preferably, a controller is arranged on the top of the top shell, and the controller is electrically connected to the circulation pump, the servo motor, the booster pump, and the electromagnetic valve.

[0011] Preferably, a drain pipe is arranged at the bottom of the water collection tank, and a drain valve is arranged on the drain pipe.

[0012] Compared with the related art, the high-efficiency boiler waste heat recovery device with a heat exchanger provided by the present utility model has the following beneficial effects:

[0013] Compared with the prior art, in the high-efficiency boiler waste heat recovery device with a heat exchanger provided by this solution, the upper shell and the lower shell form the main structure of the device. Among them, the upper shell bears the main heat exchange and control functions, while the lower shell collects the waste water generated by cleaning the heat exchange tubes through the water collection tank at the bottom. The water collection tank is arranged at the bottom of the lower shell and is used to collect the waste water generated by cleaning the heat exchange tubes. The rectangular opening is located at the bottom of the lower shell and is used to discharge the waste water generated by cleaning the heat exchange tubes into the water collection tank. The smoke inlet pipe and the smoke exhaust pipe are respectively arranged on both sides of the upper shell, forming a channel for flue gas circulation. The high-temperature flue gas is introduced through the smoke inlet pipe, and after heat exchange through the water heat medium heat exchange mechanism, the low-temperature flue gas is discharged through the smoke exhaust pipe. This design realizes the capture and utilization of the boiler waste heat. The water heat medium heat exchange mechanism is installed on the upper shell and is the core component for waste heat recovery. Through the direct contact or indirect heat transfer between the heat medium (such as water) and the high-temperature flue gas, efficient heat transfer and recovery are achieved. The design of this mechanism significantly improves the energy utilization efficiency of the boiler, reduces energy consumption and emissions. The opening and closing control mechanism is used to control the opening and closing of the upper shell and the lower shell. This mechanism enables the device to be conveniently opened for maintenance, cleaning, component replacement and other operations when needed, improving the maintainability and service life of the equipment. The cleaning mechanism is arranged on the upper shell and is specifically used to clean the water heat medium heat exchange mechanism. After long-term operation, impurities such as dust and dirt may accumulate on the surface of the heat exchange mechanism, affecting the heat exchange efficiency. The existence of the cleaning mechanism effectively solves this problem and ensures that the device always maintains a good working state and high heat recovery ability;

[0014] In summary, through reasonable structural design and functional configuration, the utility model realizes the efficient recovery and utilization of boiler waste heat, while improving the maintainability and cleanliness of the equipment, and has significant economic benefits and environmental protection value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view structural schematic diagram of a high-efficiency boiler waste heat recovery device with a heat exchanger provided by the utility model;

[0016] Figure 2 is Figure 1 the front view appearance structural schematic diagram in;

[0017] Figure 3 is Figure 1 the side view sectional structural schematic diagram in;

[0018] Figure 4 is Figure 1 the enlarged structural schematic diagram of part A shown in;

[0019] Figure 5 is Figure 1 the three-dimensional structural schematic diagram of the water collection tank in.

[0020] Reference numerals: 1, upper housing; 2, lower housing; 3, water collecting tank; 4, rectangular opening; 5, smoke inlet pipe; 6, smoke exhaust pipe; 7, U-shaped positioning plate; 8, bolt; 9, top shell; 10, heat exchange pipe; 11, three-way pipe; 12, circulation pipe; 13, circulation pump; 14, water outlet pipe; 15, water inlet pipe; 16, check valve; 17, connecting plate; 18, screw; 19, sliding plate; 20, limiting block; 21, servo motor; 22, double-groove synchronous pulley; 23, serpentine pipe; 24, nozzle; 25, booster pump; 26, connecting pipe; 27, water extraction pipe; 28, solenoid valve; 29, controller. Detailed implementation manners

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order; the terms "inner", "outer", "left", "right" indicate the orientation or positional relationship based on the orientation or positional relationship 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 orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0022] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0023] An embodiment of the present invention provides a high-efficiency boiler waste heat recovery device with a heat exchanger, as Figures 1-5As shown in the figure, the high-efficiency boiler waste heat recovery device with a heat exchanger includes: an upper housing 1; a lower housing 2 provided at the bottom of the upper housing 1, and the lower housing and the upper housing are closed to form a closed shell-shaped space; a water collecting tank 3 fixedly installed at the bottom of the lower housing 2; a rectangular opening 4 opened at the bottom of the lower housing 2 and located inside the water collecting tank; a smoke inlet pipe 5 and a smoke outlet pipe 6 respectively communicated on both sides of the shell-shaped space; a water heat medium heat exchange mechanism installed on the upper housing 1, and the water heat medium heat exchange mechanism is used for recovering the boiler waste heat; an opening and closing control mechanism installed on the upper housing 1, and the opening and closing control mechanism is used for controlling the opening and closing of the upper housing 1 and the lower housing 2; a cleaning mechanism provided on the upper housing 1, and the cleaning mechanism is used for cleaning the water heat medium heat exchange mechanism.

[0024] In this embodiment, the upper housing 1 and the lower housing 2 constitute the main structure of the device. Among them, the upper housing 1 bears the main heat exchange and control functions, while the lower housing 2 collects the waste water generated by cleaning the heat exchange pipes 10 through the water collecting tank 3 at the bottom. The water collecting tank 3 is arranged at the bottom of the lower housing 2 and is used for collecting the waste water generated by cleaning the heat exchange pipes 10. The rectangular opening 4 is located at the bottom of the lower housing 2 and is used for discharging the waste water generated by cleaning the heat exchange pipes 10 to the water collecting tank. The smoke inlet pipe 5 and the smoke outlet pipe 6 are respectively arranged on both sides of the shell-shaped space, forming a channel for flue gas circulation. The high-temperature flue gas is introduced through the smoke inlet pipe 5 and, after heat exchange through the water heat medium heat exchange mechanism, the low-temperature flue gas is discharged through the smoke outlet pipe 6. This design realizes the capture and utilization of the boiler waste heat. The water heat medium heat exchange mechanism is installed on the upper housing 1 and is the core component for waste heat recovery. Through the direct contact or indirect heat transfer between the heat medium (such as water) and the high-temperature flue gas, efficient heat transfer and recovery are achieved. The design of this mechanism significantly improves the energy utilization efficiency of the boiler, reduces energy consumption and emissions. The opening and closing control mechanism is used to control the opening and closing of the upper housing 1 and the lower housing 2. This mechanism enables the device to be conveniently opened for maintenance, cleaning, component replacement and other operations when needed, improving the maintainability and service life of the equipment. The cleaning mechanism is provided on the upper housing 1 and is specifically used for cleaning the water heat medium heat exchange mechanism. After long-term operation, dust, dirt and other impurities may accumulate on the surface of the heat exchange mechanism, affecting the heat exchange efficiency. The existence of the cleaning mechanism effectively solves this problem, ensuring that the device always maintains a good working state and high heat recovery capacity.

[0025] In summary, the high-efficiency boiler waste heat recovery device with a heat exchanger described in the present invention realizes the efficient recovery and utilization of boiler waste heat through reasonable structural design and functional configuration, and at the same time improves the maintainability and cleanliness of the equipment, having significant economic benefits and environmental protection value.

[0026] In a further preferred embodiment of the present utility model, the smoke inlet pipe 5 and the smoke exhaust pipe 6 are respectively clamped and connected to both sides of the upper housing through U-shaped positioning plates 7. The U-shaped positioning plates 7 connect the smoke inlet pipe, the upper housing, and the smoke exhaust pipe into an integral body through bolts 8. A top shell 9 is fixedly installed on the top of the upper housing 1.

[0027] In this embodiment, the smoke inlet pipe 5 and the smoke exhaust pipe 6 can be connected to the upper housing 1 through two U-shaped positioning plates 7 and a plurality of bolts 8.

[0028] In a further preferred embodiment of the present utility model, the hydrothermal medium heat exchange mechanism includes: a heat exchange pipe 10 fixedly installed on the inner wall of the upper housing 1 and extending downward into the lower housing, the heat exchange pipe being distributed in an S shape within the shell-shaped space, and both ends of the heat exchange pipe being located outside the top of the upper housing; two three-way pipes 11 respectively arranged at both ends of the heat exchange pipe 10; two circulation pipes 12 respectively communicated with the two three-way pipes 11; a circulation pump 13 fixedly installed on the top of the top shell 9, the circulation pump 13 being connected to the two circulation pipes 12; a water outlet pipe 14 and a water inlet pipe 15 respectively arranged on the two three-way pipes 11; and two one-way valves 16 respectively arranged on the water outlet pipe 14 and the water inlet pipe 15.

[0029] In this embodiment, the circulation pump 13, the two circulation pipes 12, and the two three-way pipes 11 can enable the circulating water to circulate within the heat exchange pipe 10, thereby absorbing the heat of the flue gas. The low-temperature circulating water can be injected into the hydrothermal medium heat exchange mechanism through the water inlet pipe 15, and the heated high-temperature circulating water can be discharged through the water outlet pipe 14, thereby realizing waste heat utilization.

[0030] In a further preferred embodiment of the present utility model, the opening and closing control mechanism includes: two connecting plates 17 fixedly installed on both sides of the upper housing 1; two screw rods 18 respectively rotatably installed on the two connecting plates 17; a sliding plate 19 with one end thread sleeved on the screw rod 18 and the other end fixedly connected to the outside of the lower housing 2; two limiting blocks 20 respectively fixedly installed at the bottom ends of the two screw rods 18; a servo motor 21 fixedly installed on the top of the upper housing 1; two double-groove synchronous pulleys 22 respectively fixedly sleeved on the output shaft of the servo motor 21 and the top ends of the two screw rods 18; and the two double-groove synchronous pulleys on the output shaft of the servo motor are respectively connected by two synchronous belts to the two double-groove synchronous pulleys at the top ends of the two screw rods 18.

[0031] In this embodiment, the servo motor 21, the plurality of double-groove synchronous pulleys 22, and the plurality of synchronous belts can drive the plurality of screw rods 18 to rotate. The rotation of the plurality of screw rods 18 can drive the plurality of sliding plates 19 and the lower housing 2 to move up and down, thereby controlling the opening and closing of the upper housing 1 and the lower housing 2, and facilitating the maintenance of the heat exchange pipe 10 by the staff.

[0032] In a further preferred embodiment of the present utility model, the cleaning mechanism includes: a serpentine tube 23 fixedly installed on the inner wall of the top of the upper housing 1; a plurality of spray nozzles 24 provided on the serpentine tube 23; a booster pump 25 fixedly installed on the top of the top shell 9; a connecting pipe 26 provided at the water outlet end of the booster pump 25 and communicating with the serpentine tube 23; a water suction pipe 27 provided at the water inlet end of the booster pump 25; and a solenoid valve 28 provided on the water suction pipe 27.

[0033] In this embodiment, the booster pump 25 and the water suction pipe 27 can pump clear water in, pressurize it, and then inject it into the serpentine tube 23 along the connecting pipe 26. The water is sprayed onto the heat exchange tube 10 through the plurality of spray nozzles 24, thereby cleaning the soot adhering to the heat exchange tube 10.

[0034] In a further preferred embodiment of the present utility model, a controller 29 is provided on the top of the top shell 9, and the controller 29 is electrically connected to the circulation pump 13, the servo motor 21, the booster pump 25, and the solenoid valve 28.

[0035] In this embodiment, the controller 29 can be used to operate and control the device.

[0036] In a further preferred embodiment of the present utility model, a drain pipe is provided at the bottom of the water collection tank 3, and a drain valve is provided on the drain pipe.

[0037] In this embodiment, the waste water collected in the water collection tank 3 can be discharged through the drain pipe and the drain valve.

[0038] In summary, compared with the related art, the present device can not only recover and utilize the boiler waste heat more efficiently through the water heat medium technology, but also facilitate the cleaning, maintenance, and repair of the heat exchange tubes, with convenient operation and strong practicability.

[0039] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without creative efforts, combine, add or delete the features in the embodiments of the present invention according to the situation or make other adjustments, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A boiler waste heat efficient recovery device with a heat exchanger, characterized in that: include: Upper shell; A lower shell is arranged at the bottom of the upper shell, and the lower shell and the upper shell are closed to form a closed shell-shaped space; A water collecting trough fixedly installed at the bottom of the lower shell; a rectangular opening opened at the bottom of the lower shell and located in the water collecting trough; a smoke inlet pipe and a smoke exhaust pipe respectively connected to both sides of the shell-shaped space; a water heat medium heat exchange mechanism installed on the upper shell, the water heat medium heat exchange mechanism is used to recover the waste heat of the boiler; an opening and closing control mechanism installed on the upper shell, the opening and closing control mechanism is used to control the opening and closing of the upper shell and the lower shell; a cleaning mechanism arranged on the upper shell, the cleaning mechanism is used to clean the water heat medium heat exchange mechanism.

2. The boiler waste heat efficient recovery device with a heat exchanger according to claim 1, characterized in that: The smoke inlet pipe and the smoke exhaust pipe are respectively connected to the two sides of the upper shell by a U-shaped positioning plate. The U-shaped positioning plate connects the smoke inlet pipe, the upper shell and the smoke exhaust pipe as a whole by bolts. A top shell is fixedly installed on the top of the upper shell.

3. The boiler waste heat efficient recovery device with a heat exchanger according to claim 2, characterized in that: The water heat medium heat exchange mechanism includes: a heat exchange tube fixedly mounted on the inner wall of the upper shell and extending into the lower shell, the heat exchange tube is distributed in an S shape in the shell space, and both ends of the heat exchange tube are located outside the top of the upper shell; two three-way pipes are respectively arranged at both ends of the heat exchange tube; two circulation pipes respectively connected to the two three-way pipes; a circulation pump fixedly mounted on the top of the top shell, the circulation pump is connected to the two circulation pipes; a water outlet pipe and a water inlet pipe are respectively arranged on the two three-way pipes; and two one-way valves are respectively arranged on the water outlet pipe and the water inlet pipe.

4. The boiler waste heat efficient recovery device with a heat exchanger according to claim 3, characterized in that: The opening and closing control mechanism includes: two connecting plates fixedly mounted on both sides of the upper shell; two screw rods rotatably mounted on the two connecting plates; a sliding plate with one end threadedly sleeved on the screw rod and the other end fixedly connected to the outer side of the lower shell; two limit blocks fixedly mounted on the bottom ends of the two screw rods; a servo motor fixedly mounted on the top of the upper shell; two double-groove synchronous wheels fixedly sleeved on the output shaft of the servo motor and on the top ends of the two screw rods; the two double-groove synchronous wheels on the output shaft of the servo motor are respectively connected to the two double-groove synchronous wheels on the top ends of the two screw rods through two synchronous belts.

5. The boiler waste heat efficient recovery device with a heat exchanger according to claim 4, characterized in that: The cleaning mechanism includes: a serpentine tube fixedly mounted on the inner wall of the top of the upper shell; a plurality of nozzles arranged on the serpentine tube; a booster pump fixedly mounted on the top of the top shell; a connecting pipe arranged at the water outlet of the booster pump and connected to the serpentine tube; a water suction pipe arranged at the water inlet of the booster pump; and a solenoid valve arranged on the water suction pipe.

6. The boiler waste heat efficient recovery device with a heat exchanger according to claim 5, characterized in that: A controller is arranged on the top of the top shell, and the controller is electrically connected with the circulation pump, the servo motor, the booster pump and the solenoid valve.

7. The boiler waste heat efficient recovery device with a heat exchanger according to claim 1, characterized in that: A drain pipe is arranged at the bottom of the water collecting tank, and a drain valve is arranged on the drain pipe.

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