Energy-saving and environment-friendly boiler flue gas waste heat recycling device

Abstract

The utility model discloses an energy-saving and environment-friendly boiler flue gas waste heat recycling device. The energy-saving and environment-friendly boiler flue gas waste heat recycling device comprises a boiler body, a communicating pipe is arranged at the top of the boiler body, the boiler body communicates with a dust remover through the communicating pipe, and the bottom of the dust remover communicates with a heat exchange cavity provided with a heat exchange box through the communicating pipe; the heat exchange box is communicated with the boiler body through the circulating mechanism, the first conveying pump is started, hot water in the heat exchange box is sucked into the heating cavity through the water passing pipe, the interior of the boiler body is preheated through the hot water in the heating cavity, the temperature of air entering the boiler body is increased, and the heat exchange efficiency is improved. And the second conveying pump is started, water in the heating cavity is input into the heat exchange box again to be circularly heated, hot water in the heat exchange box can be circularly heated and utilized, heat waste is reduced, energy conservation, environmental protection and high efficiency are achieved, and production and the combustion rate of the boiler are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to an energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device. Background Art

[0002] In various industrial productions, industrial furnaces are widely used. A large amount of flue gas is generated after combustion in the furnaces. In the prior art, the flue gas is mostly subjected to dust removal and purification treatment, but it is ignored that the flue gas will take away a large amount of heat from the combustion furnace, which not only causes a waste of heat energy, but also affects the combustion rate of the combustion material in the combustion furnace.

[0003] In the process of boiler flue gas treatment, the flue gas needs to be dusted and purified through a dust collector, but it is ignored that the flue gas will take away a large amount of heat from the combustion furnace, which not only causes a waste of thermal energy, but the heat exchanged cannot be used to preheat the boiler, which will affect the utilization rate of resource recovery to a certain extent. Utility Model Content

[0004] The purpose of the utility model is to provide an energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device to solve the problems raised in the above background technology.

[0005] The utility model provides the following technical solution: an energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device, comprising a boiler body; a connecting pipe is arranged on the top of the boiler body, a dust collector is connected to the boiler body through the connecting pipe, the bottom of the dust collector is connected to a heat exchange cavity with a heat exchange box installed through the connecting pipe, and the heat exchange box is connected to the boiler body through a circulation mechanism;

[0006] The circulation mechanism includes a delivery pump 1, a water pipe, a heating chamber, a delivery pump 2 and a water pipe. Water pipes are arranged at both ends of the delivery pump 1. One group of delivery pump 1 is connected and installed with the inner wall of the heat exchange box. The heating chamber is opened on the inner wall of the boiler body. Another group of water pipes is connected and installed with the heating chamber. A delivery pump 2 is arranged at the bottom of the heating chamber. One end of the delivery pump 2 is connected and installed with the water pipe, and the other end of the water pipe is connected and installed with the inner wall of the heat exchange box.

[0007] Preferably, buffer plates are staggeredly installed in the inner cavity of the dust collector, and a waste heat recovery mechanism is installed inside the cavity wall of the dust collector.

[0008] Preferably, the waste heat recovery mechanism includes a placement cavity, a heat exchange tube, a connecting tube and a delivery pump three. The placement cavity is opened on the inner wall of the dust collector. A heat exchange tube is arranged inside the placement cavity. Both ends of the heat exchange tube are fixedly connected to the interior of the heat exchange box through a connecting tube. A delivery pump three is arranged on the surface of the connecting tube.

[0009] Preferably, a stirring mechanism is provided inside the heat exchange box, and a heating mechanism is provided on the cavity wall of the heat exchange box.

[0010] Preferably, a temperature sensor is embedded in the inner wall of the heating chamber.

[0011] Preferably, the stirring mechanism comprises a motor and a stirring rod, the motor is fixedly mounted on the top of the heat exchange box, and the stirring rod is mounted in the inner cavity of the heat exchange box and fixedly connected to the output end of the motor.

[0012] Preferably, the heating mechanism comprises a mounting groove, a heating rod and a thermal insulation layer, the mounting groove is opened on the inner wall of the heat exchange box, the heating rods are installed at equal intervals in the inner cavity of the mounting groove, and the thermal insulation layer is installed outside the heating rods.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model is installed in a heat exchange box connected with the boiler body through a circulation mechanism. When the delivery pump is turned on, the hot water inside the heat exchange box is sucked into the interior of the heating chamber through the water pipe, and the interior of the boiler body is preheated by the hot water inside the heating chamber, thereby increasing the temperature of the air entering the boiler body and further increasing the combustion rate of the fuel in the boiler. When the delivery pump is turned on, the water inside the heating chamber is again input into the interior of the heat exchange box for circulation heating. The hot water in the heat exchange box can be circulated and heated, which reduces the waste of heat, saves energy, is environmentally friendly and efficient, and is beneficial to production and the combustion rate of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a front cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0018] Figure 4 It is a top cross-sectional schematic diagram of the utility model.

[0019] In the figure: 1. boiler body; 2. connecting pipe; 3. dust collector; 4. heat exchange box; 5. circulation mechanism; 501. delivery pump 1; 502. water pipe; 503. heating chamber; 504. delivery pump 2; 505. water pipe; 6. waste heat recovery mechanism; 601. placement chamber; 602. heat exchange pipe; 603. connecting pipe; 604. delivery pump 3; 7. buffer plate; 8. stirring mechanism; 801. motor; 802. stirring rod; 9. temperature sensor; 10. heating mechanism; 1001. installation groove; 1002. heating rod; 1003. insulation layer. DETAILED DESCRIPTION

[0020] 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.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on 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.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "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 an indirect connection 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 invention can be understood according to specific circumstances.

[0023] The technical solution of the utility model is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0024] Embodiment 1:

[0025] The present application provides an energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device, comprising a boiler body 1; a connecting pipe 2 is provided on the top of the boiler body 1, and a dust collector 3 is connected to the boiler body 1 through the connecting pipe 2; the bottom of the dust collector 3 is connected to a heat exchange cavity in which a heat exchange box 4 is installed through the connecting pipe 2; the heat exchange box 4 is connected to the boiler body 1 through a circulation mechanism 5;

[0026] The circulation mechanism 5 includes a delivery pump 1 501, a water pipe 502, a heating chamber 503, a delivery pump 2 504 and a water pipe 505. The water pipes 502 are arranged at both ends of the delivery pump 1 501. One group of the delivery pump 1 501 is connected and installed with the inner wall of the heat exchange box 4. The heating chamber 503 is opened on the inner wall of the boiler body 1. Another group of the water pipes 502 is connected and installed with the heating chamber 503. The delivery pump 2 504 is arranged at the bottom of the heating chamber 503. One end of the delivery pump 2 504 is connected and installed with the water pipe 505. The other end of the water pipe 505 is connected and installed with the inner wall of the heat exchange box 4. The inner wall of the heating chamber 503 is embedded with a temperature sensor 9.

[0027] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, when the flue gas generated by the internal heating of the boiler body 1 is input into the dust collector 3 through the connecting pipe 2 for dust removal, the waste heat inside the flue gas is then recovered and utilized through the heat exchange box 4. When the water inside the heat exchange box 4 heats and recycles the heat of the flue gas, the delivery pump 1 501 is turned on through the external controller, and the hot water inside the heat exchange box 4 is sucked into the heating chamber 503 through the water pipe 502. The inside of the boiler body 1 is preheated by the hot water inside the heating chamber 503, thereby increasing the temperature of the air entering the boiler body 1 and further increasing the combustion rate of the fuel in the boiler. At the same time, the heat of the heating chamber 503 is heated by the temperature sensor 9, and then the delivery pump 2 504 is turned on to input the water inside the heating chamber 503 into the heat exchange box 4 again for circulating heating. The hot water in the heat exchange box 4 can be circulated and heated, thereby reducing the waste of heat, saving energy, being environmentally friendly and efficient, and being beneficial to production and the combustion rate of the boiler.

[0028] Further, buffer plates 7 are staggeredly installed in the inner cavity of the dust collector 3, and a waste heat recovery mechanism 6 is installed inside the cavity wall of the dust collector 3. The waste heat recovery mechanism 6 includes a placement cavity 601, a heat exchange tube 602, a connecting tube 603 and a delivery pump 3 604. The placement cavity 601 is opened on the inner wall of the dust collector 3, and a heat exchange tube 602 is arranged inside the placement cavity 601. Both ends of the heat exchange tube 602 are fixedly connected to the inside of the heat exchange box 4 through the connecting tube 603, and a delivery pump 3 604 is arranged on the surface of the connecting tube 603;

[0029] Specifically, Figure 1 , Figure 2As shown, when the flue gas generated by the internal heating of the boiler body 1 is input into the dust collector 3 through the connecting pipe 2 for dust removal treatment, the buffer plates 7 installed in an alternating manner inside the dust collector 3 can buffer the flow rate of the flue gas in the dust collector 3, thereby being able to improve the working efficiency of the dust collector 3 for flue gas filtering treatment to a certain extent. After the flue gas enters the interior of the dust collector 3, the flue gas carries waste heat, which can preheat the water inside the heat exchange tube 602 and recycle the heat inside the flue gas. At the same time, the connecting pipe 603 is input into the interior of the heat exchange box 4 by using the delivery pump three 604 to continue heat utilization, thereby being able to save resources to a certain extent and improve resource utilization.

[0030] Further, a stirring mechanism 8 is provided inside the heat exchange box 4, and a heating mechanism 10 is provided on the cavity wall of the heat exchange box 4. The stirring mechanism 8 includes a motor 801 and a stirring rod 802. The motor 801 is fixedly installed on the top of the heat exchange box 4, and the stirring rod 802 is installed in the inner cavity of the heat exchange box 4 and fixedly connected to the output end of the motor 801. The heating mechanism 10 includes a mounting groove 1001, a heating rod 1002 and a thermal insulation layer 1003. The mounting groove 1001 is opened on the inner wall of the heat exchange box 4, and the heating rods 1002 are installed at equal intervals in the inner cavity of the mounting groove 1001, and the thermal insulation layer 1003 is installed outside the heating rod 1002.

[0031] Specifically, Figure 1 , Figure 2 As shown, when the flue gas inside the boiler body 1 enters the dust collector 3 through the connecting pipe 2 for dust removal, the flue gas after the dust removal by the dust collector 3 enters the heat exchange chamber of the heat exchange box 4 through the connecting pipe 2, and the water inside the heat exchange box 4 is initially heated, and then the heating rod 1002 and the motor 801 are turned on by the external controller, and the water inside the heat exchange box 4 is heated by the heat generated by the power of the heating rod 1002. At the same time, the stirring rod 802 is driven by the output end of the motor 801 to stir the water inside the heat exchange box 4, so that the water inside the heat exchange box 4 can be evenly heated. At the same time, the insulation effect of the device is improved by the setting of the insulation layer 1003, and then the inside of the boiler body 1 is preheated by using the mechanism 5, and the heat generated inside the boiler body 1 is recycled as waste heat.

[0032] Working principle: When the flue gas generated by the internal heating of the boiler body 1 is input into the dust collector 3 through the connecting pipe 2 for dust removal, the waste heat inside the flue gas is then recovered and utilized through the heat exchange box 4. When the water inside the heat exchange box 4 heats and recycles the heat of the flue gas, the delivery pump 1 501 is turned on through the external controller, and the hot water inside the heat exchange box 4 is sucked into the heating chamber 503 through the water pipe 502. The inside of the boiler body 1 is preheated by the hot water inside the heating chamber 503, thereby increasing the temperature of the air entering the boiler body 1 and further increasing the combustion rate of the fuel in the boiler. At the same time, the heat of the heating chamber 503 is heated by the temperature sensor 9, and then the delivery pump 2 504 is turned on to input the water inside the heating chamber 503 into the heat exchange box 4 again for circulation heating. The hot water in the heat exchange box 4 can be circulated and heated, thereby reducing the waste of heat and being energy-saving, environmentally friendly and efficient.

[0033] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified and replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device, comprising a boiler body (1); characterized in that: The top of the boiler body (1) is provided with a connecting pipe (2), the boiler body (1) is connected to a dust collector (3) through the connecting pipe (2), the bottom of the dust collector (3) is connected to a heat exchange chamber in which a heat exchange box (4) is installed through the connecting pipe (2), and the heat exchange box (4) is connected to the boiler body (1) through a circulation mechanism (5); The circulation mechanism (5) comprises a delivery pump (501), a water pipe (502), a heating chamber (503), a delivery pump (504) and a water pipe (505). The delivery pump (501) is provided with water pipes (502) at both ends. One group of the delivery pump (501) is connected to the inner wall of the heat exchange box (4). The heating chamber (503) is provided on the inner wall of the boiler body (1). The other group of the water pipes (502) is connected to the heating chamber (503). The bottom of the heating chamber (503) is provided with a delivery pump (504). One end of the delivery pump (504) is connected to the water pipe (505). The other end of the water pipe (505) is connected to the inner wall of the heat exchange box (4).

2. The energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device according to claim 1 is characterized in that: Buffer plates (7) are installed in an alternating manner in the inner cavity of the dust collector (3), and a waste heat recovery mechanism (6) is installed inside the cavity wall of the dust collector (3).

3. The energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device according to claim 2 is characterized in that: The waste heat recovery mechanism (6) comprises a placement chamber (601), a heat exchange tube (602), a connecting tube (603) and a delivery pump three (604); the placement chamber (601) is opened on the inner wall of the dust collector (3); a heat exchange tube (602) is arranged inside the placement chamber (601); both ends of the heat exchange tube (602) are fixedly connected to the inside of the heat exchange box (4) through the connecting tube (603); and a delivery pump three (604) is arranged on the surface of the connecting tube (603).

4. The energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device according to claim 1 is characterized in that: The interior of the heat exchange box (4) is provided with a stirring mechanism (8), and the cavity wall of the heat exchange box (4) is provided with a heating mechanism (10).

5. The energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device according to claim 1 is characterized in that: A temperature sensor (9) is embedded in the inner wall of the heating chamber (503).

6. The energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device according to claim 4 is characterized in that: The stirring mechanism (8) comprises a motor (801) and a stirring rod (802); the motor (801) is fixedly mounted on the top of the heat exchange box (4); and the stirring rod (802) is mounted in the inner cavity of the heat exchange box (4) and fixedly connected to the output end of the motor (801).

7. The energy-saving and environmentally friendly boiler flue gas waste heat recovery and utilization device according to claim 4 is characterized in that: The heating mechanism (10) comprises a mounting groove (1001), a heating rod (1002) and a thermal insulation layer (1003); the mounting groove (1001) is provided on the inner wall of the heat exchange box (4); the heating rods (1002) are installed at equal intervals in the inner cavity of the mounting groove (1001); and the thermal insulation layer (1003) is installed outside the heating rods (1002).

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