Waste heat recovery heating device

Abstract

The invention relates to the technical field of heating devices, in particular to a waste heat recovery heating device which comprises a water inlet pump and a water outlet pump which are connected with an inlet and an outlet of a heat transfer pipe respectively, the heat transfer pipe is arranged in an inner cavity of a flow guide assembly, a shell is arranged on the periphery of the flow guide assembly, and a flow guide channel is arranged between the shell and the flow guide assembly. According to the device, through the arrangement of the flow guide channel and the flow guide assembly, the problems that the heat transfer efficiency of the heated pipe is low, the temperature distribution of water output from the heat transfer pipe is uneven, and the heat transfer pipe is prone to physical deformation or damage are solved, the heat transfer efficiency is improved, and the heat transfer efficiency is improved. The temperature of water output from the heat transfer pipe is uniformly distributed, and physical deformation or damage of the heat transfer pipe is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of heating devices, and in particular to a waste heat recovery heating device. Background Art

[0002] Waste heat recovery heating refers to the use of waste heat, waste water, and waste gas emitted during industrial production processes. The heat energy is recycled through waste heat recovery technology for purposes such as heating. Therefore, waste heat recovery has the advantages of improving energy efficiency, reducing energy waste, and reducing the need for burning fuel, thereby reducing the emission of pollutants such as sulfur dioxide and nitrogen oxides, and improving air quality.

[0003] In power plants, coal chemical industry and other industries, the flue gas after boiler combustion passes through the dust removal system, and then the flue gas waste heat recovery device captures the heat in the high-temperature flue gas generated in the industrial process and converts it into usable heat energy. The flue gas waste heat recovery device is mainly composed of a shell, a heat transfer tube and a sealing material. The high-temperature flue gas enters the shell from the air inlet, and the flue gas and water flow on the inner and outer sides of the heat transfer tube in the shell respectively to transfer heat. Then, the flue gas after heat exchange is discharged from the air outlet of the shell; the high-temperature flue gas enters the shell from the air inlet, and first exchanges heat with the heat transfer tube closest to the air inlet, and then exchanges heat with the heat transfer tubes in the back row in turn, so that the heat transfer tube close to the air inlet is first exposed to more heat, while the heat of other tubes is insufficient, thereby affecting the overall heat transfer efficiency; further affecting the uniformity of the water temperature distribution output in the heat transfer tube, the front row of heated tubes is directly impacted by the high-temperature flue gas at the air inlet, the surface of the heat transfer tube is scaled, the heat transfer efficiency is reduced, and the heat transfer tube is physically deformed or damaged.

[0004] Therefore, the present invention provides a waste heat recovery heating device to solve the problems raised in the above background technology. Summary of the invention

[0005] The purpose of the present invention is to provide a waste heat recovery heating device to solve the problems of low heat transfer efficiency, uneven temperature distribution of water output in the heat transfer tube, and easy physical deformation or damage of the heat transfer tube in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a waste heat recovery heating device, including an inlet pump and an outlet pump, the inlet pump and the outlet pump are respectively connected to the inlet and outlet of the heat transfer pipe, the heat transfer pipe is arranged in the inner cavity of the guide component, a shell is arranged on the periphery of the guide component, and a guide channel is arranged between the shell and the guide component. The guide channel transmits the flue gas to the inner cavity of the guide component to exchange heat with the heat transfer pipe.

[0007] A further improvement of the technical solution of the present invention is that a smoke inlet channel and a smoke outlet channel are respectively provided on the left and right sides of the shell, the smoke inlet channel is connected to the boiler through a pipeline, and the smoke outlet channel is connected to the chimney.

[0008] A further improvement of the technical solution of the present invention is that the heat transfer tubes are arranged in rows longitudinally, and the heat transfer tubes in each row are connected.

[0009] A further improvement of the technical solution of the present invention is that the flow guide assembly includes flow guide plates arranged at the front and rear sides of the heat transfer tube, flow guide holes are arranged on the flow guide plates, and a flow guide piece is arranged on one side of the flow guide hole located at the inner cavity of the flow guide assembly.

[0010] A further improvement of the technical solution of the present invention is that the guide piece is trumpet-shaped, the inner diameter of the bottom of the guide piece is the same as the inner diameter of the guide hole, and the outwardly expanded outlet of the guide piece faces between the two rows of heat transfer tubes.

[0011] A further improvement of the technical solution of the present invention is that the guide component also includes a V-shaped member arranged in the smoke inlet channel, the fold of the V-shaped member is opposite to the smoke inlet of the smoke inlet channel, the upper and lower edges of the V-shaped member are respectively connected to the upper and lower plates of the smoke inlet channel body, and the two end surfaces of the V-shaped member are respectively connected to the guide plates.

[0012] A further improvement of the technical solution of the present invention is that: the upper and lower sides of the guide plate are connected to the shell, and the right side of the guide plate is connected to the smoke outlet channel.

[0013] A further improvement of the technical solution of the present invention is that the inlet of the water inlet pump is connected to the tap water pipe to transport the water in the tap water pipe to the heat transfer pipe, the outlet of the heat transfer pipe is connected to the insulated water tank, the insulated water tank is connected to the water outlet pump, and the water outlet pump transports the water after heat exchange to the heating area.

[0014] A further improvement of the technical solution of the present invention is that a vertical first baffle and a second baffle are arranged in the guide channel, both sides of the first baffle and the second baffle body are bent toward the guide plate direction, and the bending angle of the first baffle body is greater than the angle of the second baffle body.

[0015] A further improvement of the technical solution of the present invention is that: the right side edge of the first baffle is connected to the left side of the guide plate at 1 / 3, and the left side of the first baffle is flush with the left side of the guide plate; the second baffle is connected to the guide plate at 2 / 3, and the left side of the first baffle is flush with the left side of the guide plate; the first baffle and the second baffle divide the guide channel into a first guide channel, a second guide channel and a third guide channel.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects:

[0017] 1. The present invention provides a waste heat recovery heating device, which transports tap water from a tap water pipe to a heat transfer pipe through a water inlet pump, and transports the water in the heat transfer pipe to a heating area through a water outlet pump. The guide channel transports the high-temperature flue gas after boiler combustion to the inner cavity of the guide component to exchange heat with the heat transfer pipe in the inner cavity of the guide component. The arrangement of the guide channel and the guide component solves the problems of low heat transfer efficiency of the heated pipe, uneven temperature distribution of the water output in the heat transfer pipe, and easy physical deformation or damage of the heat transfer pipe, thereby improving the heat transfer efficiency, making the temperature distribution of the water output in the heat transfer pipe uniform, and reducing the physical deformation or damage of the heat transfer pipe.

[0018] 2. The present invention provides a waste heat recovery heating device, wherein the flow guide component of the device includes a flow guide plate arranged at the front and rear sides of a heat transfer tube, a flow guide hole is arranged on the flow guide plate, and a flow guide piece is arranged on one side of the flow guide hole located at the inner cavity of the flow guide component. The smoke enters the flow guide channels at the front and rear sides of the shell from the smoke inlet channel respectively, and the smoke in the flow guide channel enters the front and rear side cavities of the flow guide component through the flow guide hole and the flow guide piece. The smoke entering from the front and rear sides exchanges heat with all the heat transfer tubes in the cavity of the flow guide component almost simultaneously, thereby reducing the uneven distribution of water temperature output from the heat transfer tube caused by the inconsistent heat of the smoke exchanged with the heat transfer tube, thereby improving the low heat transfer efficiency of the smoke and the uniformity of the temperature distribution of the water output from the heat transfer tube; the outward expansion outlet of the flow guide piece is directly facing between the two rows of heat transfer tubes, thereby reducing the direct impact of the high-temperature smoke from the air inlet on the heated tube and the scaling on the surface of the heat transfer tube; the heat transfer efficiency is improved and the physical deformation or damage of the heat transfer tube is reduced.

[0019] 3. The present invention provides a waste heat recovery heating device, in which the guide piece is in the shape of a trumpet. The smoke enters from the smoke inlet of the guide channel, passes through the guide holes and the guide piece. The trumpet-shaped guide piece can effectively reduce the air pressure at the smoke exhaust port, reduce the smoke transmission resistance, improve the transmission performance, and make the smoke transmission smoother.

[0020] 4. The present invention provides a waste heat recovery heating device, which has a V-shaped member arranged in the smoke channel. The fold of the V-shaped member faces the smoke inlet of the smoke channel. The smoke in the smoke channel effectively enters the guide channel from the smoke inlet, reducing the resistance of the smoke entering the guide channel, guiding the smoke, and improving the efficiency of smoke guiding.

[0021] 5. A waste heat recovery heating device provided by the present invention divides the guide channel into a first guide channel, a second guide channel and a third guide channel by arranging a vertical first baffle and a second baffle in the guide channel. The smoke enters the guide holes and guide pieces on the 1 / 3 left side of the guide plate from the first guide channel, enters the guide holes and guide pieces on the 2 / 3 left side of the guide plate from the second guide channel, and enters the guide holes and guide pieces on the 3 / 3 left side of the guide plate from the third guide channel, so as to prevent the smoke in the guide channel from being transmitted back and forth. Inconsistent flow rate; ensure the consistency of the flow rate of smoke in the guide channel entering the guide component, and both sides of the first baffle and the second baffle body are bent towards the guide plate direction. The bending angle of the first baffle body is greater than the angle of the second baffle body, which can make the entrance of the first channel smaller than the entrance of the second channel, and the entrance of the second channel smaller than the entrance of the third channel, further reducing the inconsistency of the transmitted smoke flow rate caused by different distances between the guide holes and the guide components, thereby improving the heat transfer efficiency of the smoke and the uniformity of the water temperature distribution output in the heat transfer tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 The figure is a schematic diagram of the overall structure of a waste heat recovery heating device;

[0024] Figure 2 It is a schematic diagram of the structure of the shell, the flow guide assembly, and the heat transfer tube;

[0025] Figure 3 It is a schematic diagram of the flow guide assembly and heat transfer tube structure;

[0026] Figure 4 is a schematic diagram of the structure of the diversion component;

[0027] Figure 5 is a structural schematic diagram of the diversion channel;

[0028] Figure 6 is a schematic diagram of the structure of the guide member;

[0029] Figure numerals: 1, shell; 2, guide channel; 3, heat transfer tube; 4, guide assembly; 5, smoke inlet channel; 6, smoke outlet channel; 7, boiler; 8, chimney; 9, insulated water tank; 10, water inlet pump; 11, water outlet pump; 41, guide plate; 42, guide hole; 43, guide member; 44, V-shaped member; 51, smoke inlet; 211, first baffle; 221, second baffle; 21, first guide channel; 22, second guide channel; 23, third guide channel. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 invention can be understood according to specific circumstances.

[0033] The present invention is further explained below in conjunction with specific implementation modes.

[0034] like Figure 1 to Figure 6As shown, a waste heat recovery heating device provided in this embodiment includes an inlet pump 10 and an outlet pump 11. The inlet pump 10 and the outlet pump 11 are respectively connected to the inlet and outlet of the heat transfer pipe 3 through pipelines. The heat transfer pipe 3 is arranged in the inner cavity of the guide component 4. The inlet of the inlet pump 10 is connected to the tap water pipe to transport the water in the tap water pipe to the heat transfer pipe 3. The outlet of the heat transfer pipe 3 is connected to the insulated water tank 9. The insulated water tank 9 is connected to the outlet pump 11. The outlet pump 11 transports the water after heat exchange to the heating area. A shell 1 is arranged on the periphery of the guide component 4. A guide channel 2 is arranged between the shell 1 and the guide component 4. The guide channel 2 transmits the smoke to the guide component 4. The device delivers tap water to the heat transfer pipe through a water inlet pump, and delivers water in the water pipe to the heat transfer pipe. The water outlet pump delivers the water in the heat transfer pipe to the heating area. The flow guide channel delivers the high-temperature flue gas after the boiler is burned to the inner cavity of the flow guide component, and exchanges heat with the heat transfer pipe in the inner cavity of the flow guide component. The setting of the flow guide channel and the flow guide component solves the problems of low heat transfer efficiency of the heated pipe, uneven temperature distribution of the water output in the heat transfer pipe, and easy physical deformation or damage of the heat transfer pipe, thereby improving the heat transfer efficiency, making the temperature distribution of the water output in the heat transfer pipe uniform, and reducing the physical deformation or damage of the heat transfer pipe. A smoke inlet channel 5 and a smoke outlet channel 6 are respectively provided on the left and right sides of the shell 1. The smoke inlet channel 5 is connected to the boiler 7 through a pipeline, and the smoke outlet channel 6 is connected to the chimney 8. The smoke after combustion in the boiler 7 enters the smoke inlet channel 5, exchanges heat with the heat transfer pipe in the inner cavity of the guide component in the shell 1, and then enters the chimney from the smoke outlet channel 6 connected to the right side of the inner cavity of the guide component, thereby improving energy efficiency and utilization, reducing energy waste, reducing the demand for burning fuel, and thus reducing the emission of pollutants such as sulfur dioxide and nitrogen oxides.

[0035] like Figure 2 , Figure 3 and Figure 6As shown, in this embodiment, the guide assembly 4 includes a guide plate 41 arranged at the front and rear sides of the heat transfer tube 3, the upper and lower sides of the guide plate 41 are connected to the shell 1, and the right side of the guide plate 41 is connected to the smoke outlet channel 6. The guide plate 41 is provided with a guide hole 42, and a guide member 43 is arranged on the guide hole 42 on one side of the inner cavity of the guide assembly 4; the guide member 43 is in a trumpet shape, the inner diameter of the bottom of the guide member 43 is the same as the inner diameter of the guide hole 42, and the outlet of the guide member 43 is directly facing between the two rows of heat transfer tubes 3. The heat transfer tubes 3 are arranged in a row longitudinally, and each row of heat transfer tubes is connected. The smoke enters the guide channels on the front and rear sides of the shell from the smoke inlet channel respectively. The smoke in the guide channels enters the front and rear cavities of the guide assembly through the guide holes and the guide pieces. The smoke entering from the front and rear sides exchanges heat with all the heat transfer tubes in the guide assembly cavity almost simultaneously, reducing the uneven temperature distribution of the water output in the heat transfer tube caused by the inconsistent heat of the smoke exchanged with the heat transfer tube, thereby improving the low heat transfer efficiency of the smoke and the uniformity of the temperature distribution of the water output in the heat transfer tube. The outward-expanded outlet of the guide piece is directly facing between the two rows of heat transfer tubes, reducing the direct impact of the high-temperature smoke from the air inlet on the heat-receiving tube and scaling on the surface of the heat transfer tube. The heat transfer efficiency is improved and the physical deformation or damage of the heat transfer tube is reduced.

[0036] like Figure 3-4 As shown, in this embodiment, the guide component 4 also includes a V-shaped member 44 arranged in the smoke inlet channel 5, the fold of the V-shaped member 44 is opposite to the smoke inlet port 51 of the smoke inlet channel 5, the upper and lower edges of the V-shaped member 44 are respectively connected to the upper and lower plates of the smoke inlet channel 5 body, and the two end surfaces of the V-shaped member 44 are respectively connected to the guide plate 41; the smoke enters from the smoke inlet of the guide channel, passes through the guide holes and the guide member, and the trumpet-shaped guide member can effectively reduce the air pressure at the smoke exhaust port, reduce the smoke transmission resistance, improve the transmission performance, and make the smoke transmission smoother.

[0037] like Figure 3 , Figure 4As shown, in this embodiment, a vertical first baffle 211 and a second baffle 221 are arranged in the guide channel 2, and both sides of the first baffle 211 and the second baffle 221 are bent toward the guide plate 41, and the bending angle of both sides of the first baffle 211 body is greater than the angle of both sides of the second baffle 221 body. The right side surface of the first baffle 211 is connected to 1 / 3 of the left side of the guide plate 41, and the left side of the first baffle 211 is flush with the left side of the guide plate 41; the second baffle 221 is connected to 2 / 3 of the guide plate 41, and the left side of the first baffle 221 is flush with the left side of the guide plate 41; the first baffle 211 and the second baffle 221 divide the guide channel 2 into the first guide channel 21, the second guide channel 22 and the third guide channel 23. The device divides the guide channel into the first guide channel, the second guide channel and the third guide channel by arranging a vertical first baffle and a second baffle in the guide channel. The smoke enters the guide holes and the guide member on the 1 / 3 left side of the guide plate from the first guide channel, enters the guide holes and the guide member on the 2 / 3 left side of the guide plate from the second guide channel, and enters the guide holes and the guide member on the 3 / 3 left side of the guide plate from the third guide channel, so as to prevent the flow of smoke in the guide channel from being inconsistent when transmitted forward and backward; to ensure the consistency of the flow of smoke in the guide channel entering the guide assembly, both sides of the first baffle and the second baffle body are bent toward the guide plate, and the bending angle of both sides of the first baffle body is greater than the angle of both sides of the second baffle body, so that the entrance of the first channel can be smaller than the entrance of the second channel, and the entrance of the second channel can be smaller than the entrance of the third channel, so as to further reduce the inconsistency of the smoke flow transmitted due to different distances between the guide holes and the guide assembly, and improve the heat transfer efficiency of the smoke and the uniformity of the water temperature distribution output in the heat transfer pipe.

[0038] The present embodiment provides an assembled steel structure connection node, the working principle of which is as follows: the smoke after combustion of the boiler 7 enters the smoke inlet channel 5, and the smoke passes through the guide of the V-shaped member 44 to enter the first guide channel 21, the second guide channel 22 and the third guide channel 23 in the guide channel 2, and the smoke in the first guide channel 21, the second guide channel 22 and the third guide channel 23 passes through the guide holes 42 and the guide members 43 on the corresponding guide plates 41, and enters the inner cavity of the guide component 4, and exchanges heat with the heat transfer pipe 3 in the inner cavity of the guide component 4. The smoke after heat exchange with the heat transfer pipe 3 enters the chimney from the smoke outlet channel 6 connected to the right side of the inner cavity of the guide component; the inlet and outlet of the heat transfer pipe 3 The outlets are connected to the water inlet pump 10 and the water outlet pump 11 through pipelines respectively. The inlet of the water inlet pump 10 is connected to the water pipe to transport the water in the tap water pipe to the heat transfer pipe 3. The outlet of the heat transfer pipe 3 is connected to the insulated water tank 9. The insulated water tank 9 is connected to the water outlet pump 11. The water outlet pump 11 transports the water after heat exchange to the heating area; improves energy efficiency and utilization, reduces energy waste, reduces the demand for burning fuel, and thus reduces the emission of pollutants such as sulfur dioxide and nitrogen oxides; solves the problems of low heat transfer efficiency of the heated pipe, uneven temperature distribution of the water output in the heat transfer pipe, and easy physical deformation or damage of the heat transfer pipe, improves heat transfer efficiency, uniform temperature distribution of the water output in the heat transfer pipe, and reduces physical deformation or damage of the heat transfer pipe.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waste heat recovery heating device, characterized in that: The invention comprises an inlet pump (10) and an outlet pump (11), wherein the inlet pump (10) and the outlet pump (11) are respectively connected to the inlet and outlet of a heat transfer pipe (3), the heat transfer pipe (3) is arranged in the inner cavity of a flow guide component (4), a shell (1) is arranged on the outer periphery of the flow guide component (4), a flow guide channel (2) is arranged between the shell (1) and the flow guide component (4), and the flow guide channel (2) transfers smoke to the inner cavity of the flow guide component (4) to exchange heat with the heat transfer pipe (3).

2. The waste heat recovery heating device according to claim 1, characterized in that: A smoke inlet channel (5) and a smoke outlet channel (6) are respectively arranged on the left and right sides of the shell (1); the smoke inlet channel (5) is connected to the boiler (7) through a pipeline, and the smoke outlet channel (6) is connected to the chimney (8).

3. The waste heat recovery heating device according to claim 2, characterized in that: The heat transfer tubes (3) are arranged in rows longitudinally, and the heat transfer tubes (3) in each row are connected to each other.

4. The waste heat recovery heating device according to claim 3 is characterized in that: The flow guide assembly (4) comprises a flow guide plate (41) arranged at the front and rear sides of the heat transfer tube (3), a flow guide hole (42) being arranged on the flow guide plate (41), and a flow guide member (43) being arranged on one side of the flow guide hole (42) located at the inner cavity of the flow guide assembly (4).

5. The waste heat recovery heating device according to claim 4, characterized in that: The flow guide (43) is in a trumpet shape, the inner diameter of the bottom of the flow guide (43) is the same as the inner diameter of the flow guide hole (42), and the outwardly expanded outlet of the flow guide (43) faces directly between the two rows of heat transfer tubes (3).

6. The waste heat recovery heating device according to claim 5, characterized in that: The guide assembly (4) also includes a V-shaped member (44) arranged in the smoke inlet channel (5), the fold of the V-shaped member (44) is directly opposite to the smoke inlet port (51) of the smoke inlet channel (5), the upper and lower edges of the V-shaped member (44) are respectively connected to the upper and lower plates of the smoke inlet channel (5) body, and the two end surfaces of the V-shaped member (44) are respectively connected to the guide plate (41).

7. The waste heat recovery heating device according to claim 6, characterized in that: The upper and lower sides of the guide plate (41) are connected to the shell (1), and the right side of the guide plate (41) is connected to the smoke outlet channel (6).

8. The waste heat recovery heating device according to claim 7, characterized in that: The inlet of the water inlet pump (10) is connected to the water pipe to transport the water in the water pipe to the heat transfer pipe (3). The outlet of the heat transfer pipe (3) is connected to the heat preservation water tank (9). The heat preservation water tank (9) is connected to the water outlet pump (11). The water outlet pump (11) transports the water after heat exchange to the heating area.

9. The waste heat recovery heating device according to claim 8, characterized in that: A vertical first baffle (211) and a second baffle (221) are arranged in the guide channel (2); both sides of the first baffle (211) and the second baffle (221) body are bent in the direction of the guide plate (41); and the bending angle of the two sides of the first baffle (211) body is greater than the angle of the two sides of the second baffle (221) body.

10. The waste heat recovery heating device according to claim 9, characterized in that: The right side surface of the first baffle (211) is connected to the left side of the guide plate (41) at 1 / 3, and the left side of the first baffle (211) is flush with the left side of the guide plate (41); the second baffle (221) is connected to the left side of the guide plate (41) at 2 / 3, and the left side of the first baffle (211) is flush with the left side of the guide plate (41); the first baffle (211) and the second baffle (221) divide the guide channel (2) into a first guide channel (21), a second guide channel (22) and a third guide channel (23).

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