WO2023212979A1

WO2023212979A1 - Boiler having waste heat recovery function

Info

Publication number: WO2023212979A1
Application number: PCT/CN2022/092935
Authority: WO
Inventors: 杨明海
Original assignee: 天津大学滨海工业研究院有限公司
Priority date: 2022-05-06
Filing date: 2022-05-16
Publication date: 2023-11-09
Also published as: CN217715460U

Abstract

A boiler having a waste heat recovery function, comprising a boiler body (1). A flue gas discharge pipe (2) is provided on the upper side of the boiler body (1); the other end of the flue gas discharge pipe (2) is communicated with a waste heat recovery box (4) by means of a filtering assembly (3); a water passage cavity (5) is provided in the waste heat recovery box (4); the water passage cavity (5) is of a wavy structure and inner cavities are communicated; one end of the water passage cavity (5) is communicated with a water inlet (7) of the waste heat recovery box (4), and the other end of the water passage cavity (5) is communicated with a water outlet (8) of the waste heat recovery box (4); the water passage cavity (5) is provided with a plurality of gas guide holes (13) running through the water passage cavity (5); a gas discharge pipe (6) is provided at the end of the waste heat recovery box (4) away from the flue gas discharge pipe (2). Beneficial effect: flue gas generated by the boiler is discharged by the flue gas discharge pipe (2) and is preliminarily purified by the filtering assembly (3), the preliminarily purified flue gas enters the waste heat recovery box (4) and exchanges heat with water in the water passage cavity (5), the water passage cavity (5) is configured to be of a wavy structure and the inner cavities are communicated, and the water passage cavity (5) is provided with a plurality of gas guide holes (13) running through the water passage cavity (5), thereby effectively improving waste heat recovery efficiency.

Description

A boiler with waste heat recovery function

Technical field

The utility model belongs to the field of boiler equipment, and in particular relates to a boiler with a waste heat recovery function.

Background technique

The boiler transfers the heat released after the fuel is burned to the water in the container, causing the water to heat up to meet the requirements for use in industrial equipment. The boiler produces a large amount of flue gas during the fuel combustion process. If the flue gas is directly discharged into the atmosphere or purified by a purification device and then discharged into the atmosphere, the heat in the flue gas will be lost, resulting in a waste of energy. Therefore, it is of great significance to effectively utilize boiler waste heat and obtain a high waste heat recovery rate.

Utility model content

In view of this, the present utility model aims to overcome the deficiencies of the above-mentioned problems in the prior art and propose a boiler with a waste heat recovery function.

In order to achieve the above purpose, the technical solution of the present invention is achieved as follows:

A boiler with a waste heat recovery function, including a boiler body. A smoke exhaust pipe is provided on the upper side of the boiler body. The other end of the smoke exhaust pipe is connected to a waste heat recovery box through a filter assembly. The waste heat recovery box is equipped with a smoke exhaust pipe. Water-passing chamber, the water-passing chamber has a wavy structure and the internal cavities are connected. One end of the water-passing chamber is connected to the water inlet of the waste heat recovery box, and the other end is connected to the water outlet of the waste heat recovery box. The water-passing chamber is provided with a plurality of air guide holes penetrating the water-passing chamber, and an exhaust pipe is provided at one end of the waste heat recovery box away from the smoke exhaust pipe.

Furthermore, the surfaces of the exhaust pipe and the waste heat recovery box are covered with an insulation layer.

Further, the filter assembly includes a first connecting ring, a second connecting ring and a third connecting ring that are fixedly connected together from left to right, and a first smoke inlet is provided on the left side of the first connecting ring, so The exhaust pipe is fixedly connected to the smoke inlet, and the right side of the third connecting ring is fixedly connected to the second smoke inlet on the waste heat recovery box. Between the first connecting ring, the second connecting ring and the third The right opening of the connecting ring is provided with a first filter screen, a second filter screen and a third filter screen respectively.

Further, the density of the first filter, the second filter and the third filter increases in sequence.

Further, an annular first limiting boss is circumferentially provided on the inner wall of the right open end of the first connecting ring, the second connecting ring and the third connecting ring, and the second connecting ring, the third connecting ring and the third connecting ring are circumferentially provided with an annular first limiting boss. The inner wall of the left opening end of the second smoke inlet is provided with an annular second limiting boss, and the right openings of the first, second and third connecting rings are respectively fixedly connected to the first connecting ring. The second connecting ring, the third connecting ring and the left opening of the second smoke inlet, and the first filter screen, the second filter screen and the third filter screen are respectively embedded in the corresponding first limiting boss and the third filter screen. between two limiting bosses.

Further, the inner walls of the right opening ends of the first connecting ring, the second connecting ring and the third connecting ring are all provided with first stop bosses circumferentially to the left, and the second connecting ring, the third connecting ring The second smoke inlet and the outer wall of the left open end of the second smoke inlet are both circumferentially provided with a second stop boss and the second stop boss, and the first stop boss and the second stop boss are fixedly connected together through threads.

Furthermore, an exhaust port is provided at one end of the waste heat recovery box away from the exhaust pipe, and an annular clamping platform is provided on the inner wall of the exhaust port. A fourth filter screen is overlapped on the annular clamping platform. The air pipe is threadedly connected to the exhaust port, and the lower end is against the upper surface of the fourth filter.

Further, a downward inclined plate is provided below the exhaust port. The upper end of the inclined plate is fixed to the top of the inside of the waste heat recovery box, and there is a gap between the lower end and the right side wall of the inside of the waste heat recovery box.

Compared with the existing technology, this utility model has the following advantages:

The boiler with waste heat recovery function described in the utility model discharges the flue gas generated by the boiler through the exhaust pipe, and performs preliminary purification through the filter assembly. The preliminary purified flue gas enters the waste heat recovery box and interacts with the water in the water chamber. Water performs heat exchange; the water-passing chamber is set into a wave-shaped structure and the internal cavities are connected to increase the contact area of heat exchange between flue gas and water in the waste heat recovery box. Multiple air guide holes are provided throughout the water-passing chamber. The contact area between the flue gas and the water passing chamber is further increased, effectively improving the waste heat recovery efficiency.

Description of the drawings

The drawings that constitute a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the attached picture:

Figure 1 is a schematic structural diagram of a boiler with waste heat recovery function according to an embodiment of the present invention;

Figure 2 is a schematic diagram of the water passage chamber according to the embodiment of the present utility model;

Figure 3 is a partial enlarged view of part A in Figure 1;

Figure 4 is a schematic structural diagram of the filter assembly according to the embodiment of the present invention.

Explanation of reference symbols:

1-boiler body; 2-exhaust pipe; 3-filter assembly; 4-waste heat recovery tank; 5-water chamber; 6-exhaust pipe; 7-water inlet; 8-water outlet; 9-inclined plate; 10 -The fourth filter; 11-exhaust port; 12-annular clamp; 13-air guide hole; 14-first connecting ring; 15-second connecting ring; 16-third connecting ring; 17-second smoke inlet 18-the first smoke inlet; 19-the first limit boss; 20-the second limit boss; 21-the first filter; 22-the second filter; 23-the third filter; 24 -The first stop boss; 25-The second stop boss.

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention. The novel and simplified description does 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 therefore cannot be construed as a limitation of the present invention. Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined by "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more.

In the description of the present utility model, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Detachable connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in Figures 1 to 4, a boiler with waste heat recovery function includes a boiler body 1. A smoke exhaust pipe 2 is provided on the upper side of the boiler body 1. The other end of the smoke exhaust pipe 2 passes through a filter assembly 3 It is connected to the waste heat recovery box 4. There is a water passage chamber 5 inside the waste heat recovery box 4. The water passage chamber 5 has a wavy structure and the internal cavities are connected. One end of the water passage chamber 5 is connected to the waste heat recovery box. 4, the other end is connected to the water outlet 8 of the waste heat recovery tank 4. The water passage chamber 5 is provided with a plurality of air guide holes 13 that penetrate the water passage chamber 5 to increase the distance between the flue gas and the water passage chamber. The contact area is 5, and an exhaust pipe 6 is provided at one end of the waste heat recovery box 4 away from the exhaust pipe 2. In this embodiment, the flue gas generated by the boiler is discharged through the exhaust pipe 2 and is initially purified through the filter assembly 3. The filter assembly 3 is formed by a multi-stage filter screen with successively enhanced filtering effects, and each level of filter screen can be disassembled. ; The preliminarily purified flue gas enters the waste heat recovery box 4 and exchanges heat with the water in the water passing chamber 5 ; the water passing chamber 5 is set into a wave-shaped structure and the internal cavities are connected to increase the size of the waste heat recovery box 4 The contact area for heat exchange between flue gas and water is provided with a plurality of air guide holes 13 running through the water passing chamber 5, which further increases the contact area between the flue gas and the water passing chamber 5 and effectively improves the waste heat recovery efficiency.

The surfaces of the exhaust pipe 2 and the waste heat recovery box 4 are covered with insulation layers to reduce heat exchange between internal heat and the external environment.

The filter assembly 3 includes a first connecting ring 14, a second connecting ring 15 and a third connecting ring 16 that are fixedly connected together from left to right. A first smoke inlet is provided on the left side of the first connecting ring 14. 18. The smoke exhaust pipe 2 is fixedly connected to the smoke inlet. For example, the smoke exhaust pipe 2 is threaded or welded to the smoke inlet. The right side of the third connecting ring 16 is fixedly connected to the waste heat recovery tank 4. At the second smoke inlet 17, for example, the third connecting ring 16 and the second smoke inlet 17 are threaded or welded together, and between the first connecting ring 14, the second connecting ring 15 and the third connecting ring The right opening of 16 is provided with a first filter 21, a second filter 22 and a third filter 23 respectively. In this embodiment, a multi-stage filter is provided so that the flue gas discharged from the boiler body 1 can enter The waste heat recovery tank 4 must be filtered as cleanly as possible to avoid bringing in ash and other impurities to adhere to the water passage chamber 5 and hinder the heat exchange efficiency.

The density of the first filter screen 21, the second filter screen 22 and the third filter screen 23 increases in sequence.

The first connecting ring 14, the second connecting ring 15 and the third connecting ring 16 are circumferentially provided with an annular first limiting boss 19 on the inner wall of the right open end of the first connecting ring 14, the second connecting ring 15 and the third connecting ring 16. An annular second limiting boss 20 is provided on the inner wall of the left open end of the ring 16 and the second smoke inlet 17. The right side of the first connecting ring 14, the second connecting ring 15 and the third connecting ring 16 The side openings are respectively fixedly connected to the second connecting ring 15, the third connecting ring 16 and the left opening of the second smoke inlet 17, and the first filter screen 21, the second filter screen 22 and the third filter screen 23 are respectively embedded between the corresponding first limiting boss 19 and the second limiting boss 20. In this embodiment, the filters at each level are respectively clamped on the corresponding first limiting boss 19 and the second limiting boss. Between the limiting bosses 20, on the one hand, they play a role in limiting and fixing the filter screen, and on the other hand, they also facilitate later disassembly and cleaning of the filter screen.

The inner walls of the right opening ends of the first connecting ring 14, the second connecting ring 15 and the third connecting ring 16 are all provided with a first stop boss 24 circumferentially to the left. The outer walls of the left opening end of the connecting ring 16 and the second smoke inlet 17 are both circumferentially provided with a second stop boss 25 to the right, between the first stop boss 24 and the second stop boss 25 Fastened together by threads.

An exhaust port 11 is provided at one end of the waste heat recovery box 4 away from the exhaust pipe 2. An annular clamping platform 12 is provided on the inner wall of the exhaust port 11. A fourth filter 10 is overlapped on the annular clamping platform 12. , the exhaust pipe 6 is threadedly connected at the exhaust port 11, and the lower end is against the upper surface of the fourth filter screen 10. The fourth filter screen 10 is provided at the exhaust port 11 to discharge the waste heat recovery box 4 on the one hand. The flue gas is purified, and on the other hand, it can also block the smoke exhaust speed, prolong the time of the flue gas in the waste heat recovery box 4, and effectively improve the heat exchange efficiency in the waste heat recovery box 4.

There is a downward inclined plate 9 below the exhaust port 11. The upper end of the inclined plate 9 is fixed to the top of the inside of the waste heat recovery box 4, and there is a gap between the lower end and the right side wall of the inside of the waste heat recovery box 4. A downward-sloping inclined plate 9 is provided below the exhaust port 11 to further reduce the speed at which the flue gas is discharged from the waste heat recovery box 4, prolong the time the flue gas remains in the waste heat recovery box 4, and make the heat exchange in the waste heat recovery box 4 more thorough.

The working process of this embodiment is as follows:

The flue gas generated by the boiler is discharged through the exhaust pipe 2 and is initially purified through the filter assembly 3. The filter assembly 3 is formed by a multi-stage filter screen with sequentially enhanced filtering effects, and the filters at each level can be disassembled; after the preliminary purification, The flue gas enters the waste heat recovery box 4, exchanges heat with the water in the water passing chamber 5, and is combined with the fourth filter screen 10 and the inclined plate 9 at the exhaust port 11 to reduce the exhaust speed of the flue gas and prolong the flow of the flue gas. The time in the waste heat recovery box 4 effectively improves the heat exchange efficiency in the waste heat recovery box 4.

The above descriptions are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in within the protection scope of this utility model.

Claims

A boiler with waste heat recovery function, characterized by: including a boiler body (1), a smoke exhaust pipe (2) is provided on the upper side of the boiler body (1), and the other end of the smoke pipe (2) passes through The filter assembly (3) is connected to the waste heat recovery box (4). The waste heat recovery box (4) is provided with a water passage chamber (5). The water passage chamber (5) has a wavy structure and the internal cavities are connected. , one end of the water-passing chamber (5) is connected to the water inlet (7) of the waste heat recovery box (4), and the other end is connected to the water outlet (8) of the waste heat recovery box (4). The water-passing chamber (5) 5) is provided with a plurality of air guide holes (13) that penetrate the water chamber (5), and an exhaust pipe (6) is provided at one end of the waste heat recovery box (4) away from the exhaust pipe (2).
A boiler with a waste heat recovery function according to claim 1, characterized in that the surfaces of the exhaust pipe (2) and the waste heat recovery box (4) are covered with insulation layers.
A boiler with waste heat recovery function according to claim 1, characterized in that: the filter assembly (3) includes a first connecting ring (14) and a second connecting ring fixedly connected together from left to right. (15) and the third connecting ring (16). A first smoke inlet (18) is provided on the left side of the first connecting ring (14), and the smoke exhaust pipe (2) is fixedly connected to the smoke inlet. The right side of the third connecting ring (16) is fixedly connected to the second smoke inlet (17) on the waste heat recovery box (4). Between the first connecting ring (14) and the second connecting ring (15) The first filter screen (21), the second filter screen (22) and the third filter screen (23) are respectively provided at the right opening of the third connecting ring (16).
A boiler with waste heat recovery function according to claim 3, characterized in that: the density of the first filter (21), the second filter (22) and the third filter (23) increases in sequence. .
A boiler with waste heat recovery function according to claim 3, characterized in that: the right open ends of the first connecting ring (14), the second connecting ring (15) and the third connecting ring (16) An annular first limiting boss (19) is circumferentially provided on the inner wall. The second connecting ring (15), the third connecting ring (16) and the inner wall of the left opening end of the second smoke inlet (17) are Each is provided with an annular second limiting boss (20), and the right openings of the first connecting ring (14), the second connecting ring (15) and the third connecting ring (16) are respectively fixedly connected to the first connecting ring (14), the second connecting ring (15) and the third connecting ring (16). The left opening of the second connecting ring (15), the third connecting ring (16) and the second smoke inlet (17), and the first filter screen (21), the second filter screen (22) and the third The filters (23) are respectively embedded between the corresponding first limiting bosses (19) and second limiting bosses (20).
A boiler with waste heat recovery function according to claim 5, characterized in that: the right open ends of the first connecting ring (14), the second connecting ring (15) and the third connecting ring (16) The inner wall is provided with a first stop boss (24) circumferentially to the left, and the outer wall of the left open end of the second connecting ring (15), the third connecting ring (16) and the second smoke inlet (17) A second stop boss (25) is provided circumferentially to the right, and the first stop boss (24) and the second stop boss (25) are fixedly connected together through threads.
A boiler with waste heat recovery function according to claim 1, characterized in that: the end of the waste heat recovery box (4) away from the exhaust pipe (2) is provided with an exhaust port (11), and the exhaust An annular clamping platform (12) is provided on the inner wall of the mouth (11). A fourth filter (10) is overlapped on the annular clamping platform (12). The exhaust pipe (6) is threadedly connected to the exhaust port (12). 11), and the lower end is against the upper surface of the fourth filter (10).
A boiler with waste heat recovery function according to claim 7, characterized in that: a downward inclined plate (9) is provided below the exhaust port (11), and the upper end of the inclined plate (9) is fixed It is connected to the top of the inside of the waste heat recovery box (4), and there is a gap between the lower end and the right wall of the inside of the waste heat recovery box (4).