WO2023231068A1

WO2023231068A1 - Boiler flue gas treatment apparatus

Info

Publication number: WO2023231068A1
Application number: PCT/CN2022/097997
Authority: WO
Inventors: 张秋佳
Original assignee: 天津大学滨海工业研究院有限公司
Priority date: 2022-06-01
Filing date: 2022-06-10
Publication date: 2023-12-07
Also published as: CN217715010U

Abstract

A boiler flue gas treatment apparatus, characterized by: comprising a housing (1) and a flow guide tube group, a partition plate (11) being disposed in the housing (1), a purification cavity (12) being above the partition plate (11), a heat exchange cavity (13) being below the partition plate (11), a sealing cover (2) being disposed at the top of the purification cavity (12), and a first flange connecting tube (21) being disposed on the sealing cover (2); the purification cavity (12) is connected to the heat exchange cavity (13) by means of a connecting tube (31), a water inlet tube (32) and a water outlet tube (33) are disposed on side wall of the heat exchange cavity (13), and a drainage tube (34) is also disposed on the side wall of the purification cavity (12); the flow guide tube group comprises an aeration section, a heat exchange section and a second flange connection tube (5) that are sequentially in communication, the aeration section being disposed inside the purification cavity (12) and the heat exchange section being disposed inside the heat exchange cavity (13). The boiler flue gas treatment apparatus can purify boiler flue gas and recover heat carried by the flue gas.

Description

A boiler flue gas treatment device

Technical field

The utility model belongs to the field of boiler auxiliary equipment, and in particular relates to a boiler flue gas treatment device.

Background technique

The boiler is a common energy conversion equipment. When working, workers can input fuel containing chemical energy or electrical energy into the boiler. The boiler will then convert the energy in the fuel and finally output steam and high-temperature water containing thermal energy. Or organic heat carrier.

When the internal fuel of the boiler is fossil fuel, the flue gas generated by combustion will contain a large amount of harmful substances. In order to avoid these harmful substances polluting the atmospheric environment, those skilled in the art will purify the flue gas before it is discharged. However, existing flue gas purification equipment cannot recycle the waste heat in the flue gas, which will cause heat loss, resulting in a decrease in the thermal efficiency of the boiler.

Utility model content

In view of this, the present utility model aims to propose a boiler flue gas treatment device to achieve this.

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

A boiler flue gas treatment device includes a casing and a guide tube group. A partition plate is provided inside the casing. A purification cavity is located above the partition plate and a heat exchange cavity is provided below. There is a purification cavity set at the top. There is a cover, and a first flange connection is provided on the cover; the purification cavity is connected to the heat exchange cavity through a connecting pipe, and a water inlet pipe and a water outlet pipe are provided on the side walls of the heat exchange cavity. A drainage pipe is also provided on the side wall of the purification cavity; the guide tube group includes an aeration section, a heat exchange section and a second flange pipe connected in sequence, and the aeration section is placed inside the purification cavity. The heat exchange section is placed inside the heat exchange cavity; the aeration section includes a connection plate, the connection plate is arranged above the liquid level inside the purification cavity, and an aeration pipe is provided on the bottom surface of the connection plate. The air pipe is inserted below the liquid level inside the purification cavity, and an aeration hole is provided on the side wall of the aeration pipe.

Further, the heat exchange section includes a plurality of heat exchange plates, the plurality of heat exchange plates are evenly arranged along the height direction of the heat exchange cavity, and two adjacent heat exchange plates are connected by a plurality of heat exchange tubes. .

Further, the sum of the pipe diameters of the plurality of heat exchange tubes between two adjacent heat exchange plates is less than or equal to the pipe diameter of the second flange pipe.

Further, the diameter of the connecting pipe is smaller than the diameter of the water outlet pipe.

Further, an interception frame is provided between the cover and the shell, and an interception adsorption filler is provided inside the interception frame. The interception adsorption filler is opposite to the purification cavity.

Further, a first sealing ring is provided between the interception frame and the housing, and a second sealing ring is provided between the cover and the interception frame.

Further, a first connection ear is provided on the side wall of the housing, and a first connection hole is provided on the first connection ear; a second connection ear is provided on the outer wall of the intercepting frame, and a second connection ear is provided on the first connection ear. A second connection hole is provided on the ear, and the second connection hole is opposite to the first connection hole; a third connection ear is provided on the side wall of the cover, and a third connection hole is provided on the third connection ear. , the third connecting hole is opposite to the second connecting hole, and a connecting bolt is provided inside the third connecting hole, and the connecting bolt is inserted into the first connecting hole along the second connecting hole.

Compared with the existing technology, the boiler flue gas treatment device described in the present utility model has the following advantages:

(1) The boiler flue gas treatment device described in the utility model can, through the cooperation of the heat exchange cavity and the heat exchange section, cause heat exchange between the flue gas and the liquid medium inside the heat exchange cavity, thereby realizing the treatment of the flue gas. The first recovery process of waste heat inside the gas. Secondly, when the flue gas enters the purification cavity through the aeration section, the liquid medium inside the purification cavity will absorb the soluble harmful substances in the flue gas, thereby achieving the purpose of purifying the flue gas. In addition, when the flue gas comes into contact with the liquid medium inside the purification cavity, the liquid medium will purify the flue gas and conduct a second heat exchange with the flue gas, thereby absorbing as much waste heat of the flue gas as possible and reducing the boiler's energy consumption. heat loss.

(2) A boiler flue gas treatment device according to the utility model is provided with an interception adsorption filler at the top of the purification cavity. When the boiler flue gas passes through the interception adsorption filler, the interception adsorption filler can absorb adsorbable particles in the flue gas. Pollutants are intercepted, thereby further improving the degree of purification of boiler flue gas.

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 processing device according to an embodiment of the present utility model;

Figure 2 is an exploded view of the processing device according to the embodiment of the present utility model;

Figure 3 is a cross-sectional view of the processing device according to the embodiment of the present utility model;

Figure 4 is a schematic structural diagram of the guide tube group according to the embodiment of the present invention.

Explanation of reference symbols:

1-shell; 11-partition plate; 12-purification cavity; 13-heat exchange cavity; 14-first connection ear; 141-first connection hole; 2-cover; 21-first flange takeover ; 22-Third connecting ear; 221-Third connecting hole; 31-Connecting pipe; 32-Water inlet pipe; 33-Water outlet pipe; 34-Drainage pipe; 4-Connecting plate; 41-Aeration pipe; 411-Aeration hole; 5-second flange takeover; 6-heat exchange plate; 61-heat exchange tube; 7-interception frame; 71-interception adsorption packing; 72-second connection ear; 721-second connection hole; 81-th One sealing ring; 82-the second sealing ring; 9-connecting bolts.

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.

A boiler flue gas treatment device can be spliced to the flue gas discharge pipe of the boiler during use. Figures 1 to 3 are schematic diagrams of the treatment device. As shown in the figures, in this embodiment the treatment device includes a shell Body 1 and diversion tube set. The housing 1 is used to provide space for flue gas purification and waste heat recovery, and the guide tube group is used to guide the flow direction of the boiler flue gas.

The housing 1 is provided with a partition plate 11 inside. A purification cavity 12 is formed above the partition plate 11 and a heat exchange cavity 13 is formed below it. A cover 2 is provided on the top of the purification cavity 12. On the cover 2 A first flange connection 21 is also provided. During use, workers can connect the cover 2 to the flue gas discharge pipe through the first flange pipe 21 and install the housing 1 to the bottom of the cover 2 .

In order to achieve flue gas purification and waste heat recovery, liquid medium will be introduced into the device. For example, the liquid medium can be water or a solution containing adsorption and sedimentation functions. In order to facilitate the flow of liquid medium, the purification cavity 12 is connected with the heat exchange cavity 13 through a connecting pipe 31. A water inlet pipe 32 and a water outlet pipe 33 are provided on the side walls of the heat exchange cavity 13. In the purification cavity The side wall of 12 is also provided with a drainage pipe 34.

When working, the staff can introduce the liquid medium into the heat exchange cavity 13 along the water inlet pipe 32. Part of the liquid medium will flow to the downstream device along the water outlet pipe 33, and the other part will enter the purification cavity 12 along the connecting pipe 31. internally, and ultimately flows along drain pipe 34 to downstream devices.

Optionally, in order to facilitate the diverting of the liquid medium entering the housing 1 , the diameter of the connecting pipe 31 should be smaller than the diameter of the outlet pipe 33 . When working, a large amount of liquid medium will flow inside the heat exchange cavity 13, thereby recovering the waste heat inside the flue gas. A small part of the liquid medium will enter the purification cavity 12, thus causing harmful effects on the flue gas. Substances are purified.

In order to achieve the purpose of flue gas purification and waste heat recovery, the guide tube group described in this embodiment can be schematically illustrated in Figure 4. As shown in the figure, the guide tube group includes an aeration section, a heat exchange section and a heat exchanger section that are connected in sequence. The staff can connect the second flange pipe 5 to the flue gas discharge pipe. When the boiler is working, the flue gas will enter the device along the second flange pipe 5 and pass along the first flange pipe 5. Lan takes over 21 and leaves this device.

The aeration section is placed inside the purification cavity 2, and the flue gas can be introduced into the liquid medium inside the purification cavity 12 through the aeration section. Specifically, the aeration section includes a connection plate 4, which is arranged above the liquid level inside the purification cavity 12. An aeration pipe 41 is provided on the bottom of the connection plate 4, and the aeration pipe 41 is inserted into the purification chamber 12. The liquid level inside the cavity 12 is below, and an aeration hole 411 is provided on the side wall of the aeration tube 41 .

When the flue gas enters the aeration section, the aeration holes 411 will introduce the flue gas into the liquid medium inside the purification cavity 12 . At this time, soluble harmful substances (such as sulfide) in the flue gas will be dissolved inside the liquid medium to avoid polluting the external environment. The staff can also adjust the solute inside the liquid medium according to the harmful substance components inside the flue gas, thereby enhancing the purification effect of the device on flue gas.

In addition, since the connecting plate 4 is arranged above the liquid level of the liquid medium, when the amount of flue gas generated by the boiler is small or the boiler stops working, the height difference between the connecting plate 4 and the aeration hole 411 can prevent the liquid medium from aeration. Backflow occurs inside the section to prevent liquid medium from entering the inside of the boiler.

The heat exchange section is placed inside the heat exchange cavity, and the heat exchange section can provide a place for heat exchange between the flue gas and the liquid medium, thereby recovering the waste heat inside the flue gas. Specifically, in this embodiment, the heat exchange section may include multiple heat exchange plates 6. The multiple heat exchange plates 6 are evenly arranged along the height direction of the heat exchange cavity 13, and between two adjacent heat exchange plates 6 They are connected through multiple heat exchange tubes 61 .

Since the heat exchange section includes multiple heat exchange plates 6 and multiple heat exchange tubes 61 , the contact area between the flue gas and the liquid medium inside the heat exchange cavity 13 can be significantly increased. By increasing the contact area, the heat exchange effect between the liquid medium and the flue gas can be enhanced, thereby increasing the amount of waste heat recovery from the flue gas.

Optionally, in order to further improve the recovery effect of flue gas waste heat, in this embodiment, the sum of the pipe diameters of the multiple heat exchange tubes 61 between two adjacent heat exchange plates 6 is less than or equal to the pipe diameter of the second flange pipe 5 . Through the above settings, the flow speed of the flue gas inside the heat exchange section can be reduced, thereby extending the heat exchange cycle between the flue gas and the liquid medium, and absorbing as much heat as possible inside the flue gas.

In addition, since the boiler flue gas will flow in the direction of the purification cavity 12 along the heat exchange cavity 13 in this device, when the flue gas enters the purification cavity 12, the liquid medium inside the purification cavity 12 will react with the flue gas again. The heat is recovered, so that the device can have two heat exchange processes with the flue gas during operation, so it has a better waste heat recovery effect.

When the waste heat recovery work is completed, the heat in the flue gas will enter the liquid medium. At this time, the staff can use the liquid medium derived from the water outlet pipe 33 and the drainage pipe 34 as a heat medium to exchange heat with other materials. However, since harmful substances inside the flue gas will enter the liquid medium in the purification cavity 12, the liquid medium led out by the drain pipe 34 should avoid contact with other materials during use.

In the actual working process, there may also be insoluble particulate harmful substances inside the boiler flue gas. In order to facilitate the purification of such harmful substances, the treatment device described in this embodiment may also include an interception frame 7 and an interception adsorption filler. 71.

Specifically, the interception frame 7 is disposed between the cover 2 and the housing 1 , the interception adsorption filler is disposed inside the interception frame 7 , and the interception adsorption filler 71 is opposite to the purification cavity 12 .

As shown in FIG. 2 , in order to assemble the intercepting frame 7 , in this embodiment, a first connecting ear 14 is provided on the side wall of the housing 1 , and a first connecting hole 141 is provided on the first connecting ear 14 . Secondly, a second connecting ear 72 is provided on the outer wall of the intercepting frame 7 , and a second connecting hole 721 is provided on the second connecting ear 72 . In addition, a third connecting ear 22 is provided on the side wall of the cover 2 , a third connecting hole 221 is provided on the third connecting ear 22 , and a connecting bolt 9 is provided inside the third connecting hole 221 . During installation, the worker can first align the second connecting hole 721 with the first connecting hole 141 , then align the third connecting hole 221 with the second connecting hole 721 , and finally align the connecting bolt 9 along the second connecting hole 721 . The connecting hole 721 is inserted into the first connecting hole 141 to achieve fixed installation of the intercepting frame 7 .

When working, the flue gas entering the liquid medium along the aeration hole 411 will enter the inside of the first flange pipe 21 after passing through the interception adsorption packing 71 . Exemplarily, the interception adsorption filler 71 can be activated carbon filler, which can intercept insoluble toxic substances, thereby preventing them from being discharged into the external environment.

Optionally, in order to prevent the flue gas inside the purification cavity 12 from leaking out, the device may also include a first sealing ring 81 and a second sealing ring 82 . The first sealing ring 81 is disposed between the interception frame 7 and the housing 1 , and the second sealing ring 82 is disposed between the cover 2 and the interception frame 7 .

The effect of the above scheme is explained below:

This embodiment provides a boiler flue gas treatment device that can purify soluble toxic substances in the flue gas through the cooperation of the aeration section and the purification cavity, and intercept and absorb the insoluble toxic substances in the flue gas. interception, thus reducing the pollution level of boiler flue gas. In addition, this device can also recover the waste heat of the flue gas once through the cooperation of the heat exchange section and the heat exchange cavity, and realize the secondary recovery of waste heat through the contact between the flue gas and the liquid medium inside the purification cavity, so it can reduce the boiler Heat loss from work.

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 flue gas treatment device, characterized by: including a shell (1) and a guide tube group. A partition plate (11) is provided inside the shell (1), and a purification chamber is installed above the partition plate (11). Cavity (12), below which is a heat exchange cavity (13), a cover (2) is provided on the top of the purification cavity (12), and a first flange pipe (21) is provided on the cover (2); The purification cavity (12) is connected to the heat exchange cavity (13) through a connecting pipe (31), and a water inlet pipe (32) and a water outlet pipe (33) are provided on the side walls of the heat exchange cavity (13). , a drainage pipe (34) is also provided on the side wall of the purification cavity (12); the guide pipe group includes an aeration section, a heat exchange section and a second flange pipe (5) that are connected in sequence, so The aeration section is placed inside the purification cavity (12), and the heat exchange section is placed inside the heat exchange cavity (13); the aeration section includes a connecting plate (4), and the connecting plate (4) is placed inside the purification cavity. Above the liquid level inside the cavity (12), an aeration pipe (41) is provided on the bottom surface of the connecting plate (4). The aeration pipe (41) is inserted below the liquid level inside the purification cavity (12). And an aeration hole (411) is provided on the side wall of the aeration tube (41).
A boiler flue gas treatment device according to claim 1, characterized in that: the heat exchange section includes a plurality of heat exchange plates (6), and the plurality of heat exchange plates (6) are arranged along the heat exchange cavity ( 13) are evenly arranged in the height direction, and two adjacent heat exchange plates (6) are connected through a plurality of heat exchange tubes (61).
A boiler flue gas treatment device according to claim 2, characterized in that the sum of the pipe diameters of the plurality of heat exchange tubes (61) between two adjacent heat exchange plates (6) is less than or equal to the second flange Pipe diameter of nozzle (5).
A boiler flue gas treatment device according to claim 1, characterized in that: the diameter of the connecting pipe (31) is smaller than the diameter of the outlet pipe (33).
A boiler flue gas treatment device according to claim 1, characterized in that: an interception frame (7) is provided between the cover (2) and the casing (1), and an interception frame (7) is provided inside the interception frame (7). There is interception adsorption filler (71), and the interception adsorption filler (71) is opposite to the purification cavity (12).
A boiler flue gas treatment device according to claim 5, characterized in that: a first sealing ring (81) is provided between the interception frame (7) and the housing (1), and the cover (2 ) and the intercepting frame (7) are provided with a second sealing ring (82).
A boiler flue gas treatment device according to claim 5, characterized in that: a first connecting ear (14) is provided on the side wall of the housing (1), and a first connecting ear (14) is provided on the side wall. There is a first connection hole (141); the outer wall of the interception frame (7) is provided with a second connection ear (72), and the second connection ear (72) is provided with a second connection hole (721), so The second connection hole (721) is opposite to the first connection hole (141); a third connection ear (22) is provided on the side wall of the cover (2), and a third connection ear (22) is provided on the third connection ear (22). There is a third connection hole (221), the third connection hole (221) is opposite to the second connection hole (721), and a connecting bolt (9) is provided inside the third connection hole (221). The bolt (9) is inserted into the first connecting hole (141) along the second connecting hole (721).