CN218119781U

CN218119781U - Device for treating air leakage at bottom of boiler

Info

Publication number: CN218119781U
Application number: CN202221350507.6U
Authority: CN
Inventors: 李玉; 胡尊超
Original assignee: Shandong Nianlun Electric Power Technology Co ltd
Current assignee: Shandong Nianlun Electric Power Technology Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-12-23
Anticipated expiration: 2032-05-31

Abstract

The application discloses a device for treating air leakage at the bottom of a boiler, which is arranged on a boiler body and comprises a slag extractor, a connection air box and a cyclone dust collector, wherein the slag extractor comprises a connecting part communicated with a boiler main body, a transition part communicated with the connecting part and a slag conveying part communicated with the transition part, the top end of the transition part is provided with a first air port, and the side end of the transition part is provided with a second air port; the contact air box comprises a first air exhaust pipe and a second air exhaust pipe, the first air exhaust pipe is communicated with the first air port, and the second air exhaust pipe is communicated with the second air port; the cyclone dust collector comprises a collecting box and a dust removing body which are mutually communicated, the collecting box is provided with an inlet and an outlet, the inlet is communicated with a first exhaust pipe and a second exhaust pipe, the inlet is connected with a conveying fan, the bottom end of the dust removing body is provided with a slag falling port, and the slag falling port is communicated with a slag conveying part. Carry out recovery processing with stove bottom cooling air, reach the effect that reduces stove bottom air leakage, further reduced exhaust gas temperature, promote boiler efficiency.

Description

Device for treating air leakage at bottom of boiler

Technical Field

The utility model relates to a boiler equipment field especially relates to a device for administering boiler stove bottom leaks out.

Background

The dry-type slag remover is well valued by the power industry in terms of energy conservation, water conservation, environmental protection and good comprehensive benefits, and hundreds of units are put into operation at present. Working process of the dry-type slag remover: the high-temperature slag falls onto a slag extractor conveying belt through a slag discharging door at the bottom of the furnace, the slag is cooled by sucking ambient air by utilizing the negative pressure of the furnace chamber, cold air absorbs the physical sensible heat of the hot slag and the heat released by combustion of slag combustible and enters the furnace chamber, and the slag extractor continuously operates under the high-temperature condition.

However, most dry slag removers are easy to cause the condition of air leakage at the bottom of the furnace, the air leakage can increase the smoke discharge amount, the smoke discharge temperature is also improved, the smoke discharge loss is increased, the boiler efficiency is reduced, the output of a suction fan is increased, and the abrasion of a heating surface is aggravated.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a device for administering boiler stove bottom leaks out carries out recovery processing with stove bottom cooling air, reaches the effect that reduces stove bottom and leaks out, has further reduced exhaust gas temperature, promotes boiler efficiency.

In order to achieve the purpose, the utility model provides a device for managing boiler bottom air leakage, install at the boiler body, it includes slag extractor, contact bellows, cyclone, and the slag extractor includes the connecting portion that communicates with the boiler main part, the transition portion that communicates with the connecting portion and the defeated sediment portion that communicates with the transition portion, and the transition portion top is equipped with first wind gap, and the transition portion side is equipped with the second wind gap; the contact air box comprises a first air exhaust pipe and a second air exhaust pipe, the first air exhaust pipe is communicated with the first air port, and the second air exhaust pipe is communicated with the second air port; the cyclone dust collector comprises a collecting box and a dust removing body which are mutually communicated, the collecting box is provided with an inlet and an outlet, the inlet is communicated with a first exhaust pipe and a second exhaust pipe, the inlet is connected with a conveying fan, the bottom end of the dust removing body is provided with a slag falling port, and the slag falling port is communicated with a slag conveying part.

Furthermore, a plurality of first air ports are formed in the top end of the transition portion, and at least two rows of the first air ports are uniformly distributed.

Furthermore, the transition part is provided with a plurality of second air ports, the second air ports are uniformly distributed at two side ends of the transition part, and at least two rows of the second air ports are distributed at each side end from top to bottom.

Furthermore, the first air inlet is inserted into the first air exhaust pipe to form a first insertion section, the second air inlet is inserted into the second air exhaust pipe to form a second insertion section, and the first insertion section and the second insertion section are both provided with inclined openings.

Furthermore, the first air exhaust pipe and the second air exhaust pipe are both sleeved with sealing covers, the sealing covers respectively seal the first air opening and the second air opening, and the outer diameter of each sealing cover is larger than the caliber of the first air opening and the caliber of the second air opening.

Further, transition portion top and side are equipped with the mounting groove, and the mounting groove is arranged in to the sealed cowling, and the mounting groove passes through threaded connection with the sealed cowling.

Further, the inner wall of the sealing cover is provided with a sealing layer.

Further, the sealed chamber of enclosing city is enclosed with transition portion to the sealed cover, and the sealed chamber communicates with first exhaust column and second exhaust column respectively.

Furthermore, the first exhaust pipe and the second exhaust pipe are located in the sealed cavity to form a sealed section, the sealed section is evenly provided with a plurality of confluence ports along the circumferential direction, and the first exhaust pipe and the second exhaust pipe are communicated with the sealed cavity through the confluence ports.

Furthermore, the confluence port is a long port, and the confluence ports correspondingly extend along the extension directions of the first exhaust pipe and the second exhaust pipe respectively.

The beneficial effects of the utility model reside in that: carry out recovery processing with stove bottom cooling air, reach the effect that reduces stove bottom air leakage, smoke exhaust temperature has further been reduced, promote boiler efficiency, in addition, through set up first wind gap and second wind gap respectively at transition portion top and side, and communicate it with first exhaust column and second exhaust column respectively, through the cooling air that is in the transition portion from transition portion top and side suction simultaneously, the suction capacity of contact bellows to the cooling air in the transition portion has further been improved, further improve the suction volume to the cooling air through multi-direction suction, thereby avoid the cooling branch because of the suction force is not enough, partial cooling air passes through transition portion, and then the phenomenon of stove bottom air leakage appears easily.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the application and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of an installation of an embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of a junction of an interconnection bellows in an embodiment of the present invention;

FIG. 3 is a distribution diagram of the first tuyere in the embodiment shown in FIG. 2;

fig. 4 is a schematic connection diagram of a first exhaust pipe according to another embodiment of the present invention.

Wherein: 10. a boiler main body; 11. a slag extractor; 111. a connecting portion; 112. a transition section; 1121. a first tuyere; 1122. a second tuyere; 1123. mounting grooves; 113. a slag conveying part; 12. a communication bellows; 121. a first exhaust pipe; 1211. a first insertion section; 122. a second exhaust pipe; 1221. a second insertion section; 123. a bevel opening; 124. a sealing section; 1241. a flow converging port; 13. a cyclone dust collector; 131. a collection box; 1311. an inlet; 1312. an outlet; 132. a dust removal body; 1321. a slag falling port; 133. a conveying fan; 14. a sealing cover; 141. a sealing layer; 142. the chamber is sealed.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "upper", "lower", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrated. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the terms "one embodiment," "an embodiment," "a preferred implementation," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The utility model discloses in, as shown in fig. 1 to 4, provide a device for managing boiler stove bottom air leakage, install in boiler main body 10, it includes slag extractor 11, contact bellows 12, cyclone 13, slag extractor 11 includes connecting portion 111 with boiler main body 10 intercommunication, transition portion 112 with connecting portion 111 intercommunication and the defeated sediment portion 113 with transition portion 112 intercommunication, transition portion 112 top is equipped with first wind gap 1121, transition portion 112 side is equipped with second wind gap 1122; the contact air box 12 includes a first air exhaust pipe 121 and a second air exhaust pipe 122, the first air exhaust pipe 121 is communicated with the first air opening 1121, and the second air exhaust pipe 122 is communicated with the second air opening 1122; the cyclone 13 comprises a collecting box 131 and a dedusting body 132 which are communicated with each other, the collecting box 131 is provided with an inlet 1311 and an outlet 1312, the inlet 1311 is communicated with the first exhaust pipe 121 and the second exhaust pipe 122, the inlet 1311 is connected with the conveying fan 133, the bottom end of the dedusting body 132 is provided with a slag falling port 1321, and the slag falling port 1321 is communicated with the slag conveying part 113.

In the above embodiment, as shown in fig. 1, the slag extractor 11 is installed at the lower end of the boiler body 10 and is communicated with the boiler body 10, after the heat exchange of the boiler is completed, the cooling air enters the transition portion 112 together with the slag particles, the cooling air is sucked into the connecting wind box 12 by the negative pressure generated by the conveying fan 133 through the first and

second exhaust pipes

121 and 122 communicated with the transition portion 112, the cooling air and the slag particles in the first and

second exhaust pipes

121 and 122 enter the collecting box 131 through the inlet 1311 and then enter the dust removing body 132, the cooling air and the slag particles are separated by cyclone separation, the slag particles fall onto the slag conveying portion 113 of the slag extractor 11 from the slag falling port 1321 at the bottom of the dust removing body 132 by gravity, and are conveyed to other devices along with the slag conveying portion 113 for subsequent processing, and after the cooling air is separated by the cyclone separation of the dust removing body 132, the cooling air is discharged through the outlet 1312 of the collecting box 131. The discharged cooling air can be directly discharged, and can also be introduced into a boiler or used by other devices needing high-temperature gas, so that the resource utilization rate is further improved.

The device carries out recovery processing with stove bottom cooling air, reach the effect that reduces stove bottom air leakage, further reduced exhaust gas temperature, promote boiler efficiency, in addition, through set up first wind gap 1121 and second wind gap 1122 respectively on transition portion 112 top and side, and communicate it with first exhaust column 121 and second exhaust column 122 respectively, through the cooling air that is in transition portion 112 from transition portion 112 top and side suction simultaneously, the suction capacity of contact bellows 12 to the cooling air in transition portion 112 has further been improved, further improve the suction volume to the cooling air through multi-direction suction, thereby avoid the cooling branch because of the suction is not enough, partial cooling air passes through transition portion 112, and then the phenomenon of stove bottom air leakage appears easily.

Furthermore, in one embodiment, the dedusting body 132 is a cyclone centrifugal deduster arranged in the upper part of the slag extractor 11. In order to improve the dust removal efficiency, four dust removers which are operated in parallel can be arranged to efficiently separate slag particles in the air leakage at the furnace bottom, and the separated slag particles return to the slag conveying part 113 through the slag falling port 1321 and are carried by the slag conveying part 113 to be continuously conveyed into the slag bin. The inner wall of the dust remover is pasted with wear-resistant ceramic chips for wear-resistant treatment, in addition, the efficiency of the dust remover is not lower than 90 percent, and the treatment air volume is not lower than 50000m < 3 >/h.

In one embodiment, the slag transport section 113 is a steel conveyor belt, which improves the heat resistance of the slag transport section 113.

In one embodiment, the delivery fan 133 is required to withstand a temperature of 200 ℃, a total pressure rise of not less than 7000Pa, and a treatment air volume of not less than 50000m3/h. The fan is matched with a 380v motor, the power is 180 kw-220 kw, the protection grade is IP55, and the frequency conversion range is 5 Hz-50 Hz.

In a preferred embodiment, as shown in fig. 2 and 3, a plurality of first tuyeres 1121 are disposed at the top end of the transition portion 112, and the plurality of first tuyeres 1121 are uniformly distributed in at least two rows.

The first tuyeres 1121 are arranged at the top end of the transition portion 112, and the plurality of first tuyeres 1121 are arranged in at least two rows, so that the suction capacity of the transition portion 112 is further improved.

More specifically, as shown in fig. 2, the transition portion 112 is provided with a plurality of second air ports 1122, the plurality of second air ports 1122 are uniformly distributed at two side ends of the transition portion 112, and at least two rows of the plurality of second air ports 1122 are distributed at each side end from top to bottom.

The same, second wind gap 1122 is on arranging of transition portion 112 both sides end, every side adopts a plurality of second wind gaps 1122 evenly distributed to be two rows at least distribution structure, it arranges the direction for from top to bottom, the suction capacity to transition portion 112 in vertical direction has been improved, make more comprehensive that second wind gap 1122 covers, avoid the cooling air when passing through the transition section, it is lower through the position, thereby the unable whole with the cooling air suction of first wind gap 1121 that is located the upside, cause stove bottom air leakage easily.

In a preferred embodiment, as shown in fig. 2, the first air draft tube 121 is inserted into the first air opening 1121 to form a first insertion section 1211, the second air draft tube 122 is inserted into the second air opening 1122 to form a second insertion section 1221, and the first insertion section 1211 and the second insertion section 1221 are provided with the inclined opening 123.

In the above-described structure, in the connection structure of the first suction duct 121 and the first tuyere 1121 and the second suction duct 122 and the second tuyere 1122, the first suction duct 121 and the second suction duct 122 are respectively inserted into the first tuyere 1121 and the second tuyere 1122, and the length of the first insertion section 1211 and the second insertion section 1221 inserted into the first tuyere 1121 and the second tuyere 1122 can be effectively adjusted by the connection structure, so that the insertion distance of the first insertion section 1211 and the second insertion section 1221 can be adjusted according to the amount of the cooling air passing through the transition portion 112, thereby more effectively extracting the cooling air, and in addition, the first insertion section 1211 and the second insertion section 1221 are set as the inclined ports 123, increasing the suction area of the first insertion section 1211 and the second insertion section 1221, and further increasing the amount of the cooling air sucked by the first suction duct 121 and the second suction duct 122.

In a preferred embodiment, as shown in fig. 4, the first air exhaust pipe 121 and the second air exhaust pipe 122 are both sleeved with a sealing cover 14, the sealing cover 14 respectively seals the first air opening 1121 and the second air opening 1122, and the outer diameter of the sealing cover 14 is larger than the apertures of the first air opening 1121 and the second air opening 1122.

After the first air suction pipe 121 and the second air suction pipe 122 are respectively inserted into the first air inlet 1121 and the second air inlet 1122, gaps easily exist between the first air suction pipe 121 and the first air inlet 1121 and between the second air suction pipe 122 and the second air inlet 1122, therefore, the sealing cover 14 is sleeved on the first air suction pipe 121 and the second air suction pipe 122, because the outer diameter of the sealing cover 14 is larger than the caliber of the first air inlet 1121, when the first air suction pipe 121 is inserted into the first air inlet 1121, the sealing cover 14 covers the first air inlet 1121 so as to close the first air inlet 1121, so that when cooling air is sucked, the cooling air is prevented from escaping from the gap between the first air inlet 1121 and the first air suction pipe 121, and because the cooling air carries slag particles, the cooling air is easily contaminated by external leakage, in addition, the temperatures of the cooling air and the slag particles are high, and a safety problem is easily caused, therefore, the gap between the first air inlet 1121 and the first air suction pipe 121 is closed by the sealing cover 14, and the sealing performance of the device is improved. The sealing cap 14 of the second exhaust duct 122 is identical in structure to the sealing cap 14 of the first exhaust duct 121.

More specifically, as shown in fig. 4, the transition portion 112 is provided with mounting grooves 1123 at the top end and the side end, the sealing cover 14 is disposed in the mounting grooves 1123, and the mounting grooves 1123 are in threaded connection with the sealing cover 14.

In the connection between the sealing cover 14 and the transition portion 112, the top end of the transition portion 112 is provided with a mounting groove 1123 around the first air port 1121, when the first air exhaust pipe 121 is inserted into the first air port 1121, the sealing cover 14 can be mounted into the mounting groove 1123, wherein a threaded connection is used, the connection strength between the sealing cover 14 and the mounting groove 1123 is improved, and in addition, the threaded structure can improve the diffusion path of the cooling air, thereby improving the sealing performance of the sealing cover 14 and effectively avoiding the cooling air from leaking. The mounting groove 1123 at the side end is consistent with the mounting groove 1123 at the top end in structure.

More specifically, as shown in fig. 4, the inner wall of the sealing cover 14 is provided with a sealing layer 141. The sealing performance of the sealing cover 14 is improved so that the sealing layer 141 is covered on the inner wall of the sealing cover 14 after the sealing cover 14 is mounted in the mounting groove 1123, and the cooling air is effectively prevented from leaking out from the gap between the sealing cover 14 and the mounting groove 1123. In addition, the sealant 141 is selected to be a silicone sealant 141 resistant to high temperature.

In a preferred embodiment, as shown in fig. 4, the sealed cowling 14 encloses a sealed chamber 142 with the transition portion 112, the sealed chamber 142 communicating with the first and

second extraction ducts

121, 122, respectively.

After the sealing cover 14 closes the first air opening 1121 and the second air opening 1122, in order to prevent the cooling air from leaking out from the gap between the first air opening 1121 and the first air exhaust duct 121 and from the gap between the second air opening 1122 and the second air exhaust duct 122, therefore, the sealing cover 14 and the transition portion 112 enclose the sealing cavity 142, because the structures of the sealing covers 14 on the first air exhaust duct 121 and the second air exhaust duct 122 are the same, taking the first air exhaust duct 121 as an example, the cooling air enters the sealing cavity 142 after leaking out from the gap between the first air exhaust duct 121 and the first air opening 1121, wherein the sealing cavity 142 is communicated with the first air exhaust duct 121, and therefore, the cooling air entering the sealing cavity 142 enters the communication air box 12 through the first air exhaust duct 121, and further prevents the cooling air from leaking out.

More specifically, as shown in fig. 4, the first exhaust pipe 121 and the second exhaust pipe 122 are located in the sealed cavity 142 to form a sealed section 124, the sealed section 124 is uniformly provided with a plurality of converging ports 1241 along the circumferential direction, and the converging ports 1241 communicate the first exhaust pipe 121, the second exhaust pipe and the sealed cavity 142.

The sealing sections 124 on the first and

second exhaust pipes

121 and 122 are provided with a confluence opening 1241, the cooling air enters the first and

second exhaust pipes

121 and 122 through the confluence opening 1241, and in addition, the confluence opening 1241 is provided in a plurality along the circumferential direction of the sealing section 124, so that the uniformity and stability of the suction are improved.

Further, as shown in fig. 4, the confluence ports 1241 are long ports, and the confluence ports 1241 correspondingly extend along the extension directions of the first and

second exhaust ducts

121 and 122, respectively.

The converging port 1241 of the first exhaust hood 121 is a long port extending along the extending direction of the first exhaust hood 121, and the corresponding converging port 1241 of the second exhaust hood 122 is a long port extending along the extending direction of the second exhaust hood 122, so that the communication area between the sealed cavity 142 and the first and

second exhaust hoods

121 and 122 is increased, the passing rate of the cooling air is increased, and the suction capacity of the first and

second exhaust hoods

121 and 122 is further increased.

The utility model can be realized by adopting or using the prior art for reference in places which are not mentioned in the utility model.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a device for administering boiler stove bottom leaks out installs in the boiler main part, its characterized in that includes:

the slag extractor comprises a connecting part communicated with the boiler main body, a transition part communicated with the connecting part and a slag conveying part communicated with the transition part, a first air port is arranged at the top end of the transition part, and a second air port is arranged at the side end of the transition part;

the contact air box comprises a first air exhaust pipe and a second air exhaust pipe, the first air exhaust pipe is communicated with the first air port, and the second air exhaust pipe is communicated with the second air port;

the cyclone dust collector comprises a collection box and a dust collection body which are mutually communicated, the collection box is provided with an inlet and an outlet, the inlet is communicated with the first exhaust pipe and the second exhaust pipe, the inlet is connected with the conveying fan, the bottom end of the dust collection body is provided with a slag falling port, and the slag falling port is communicated with the slag conveying part.

2. The apparatus for treating boiler bottom air leakage according to claim 1, wherein: the top end of the transition part is provided with a plurality of first air openings, and the first air openings are uniformly distributed in at least two rows.

3. The device for treating the boiler bottom air leakage according to claim 2, characterized in that: the transition portion is provided with a plurality of second tuyeres, and is a plurality of the second tuyeres evenly distributed be in transition portion both sides end, a plurality of the second tuyeres all distribute at least two rows from last to bottom at every side.

4. The device for treating the boiler bottom air leakage according to the claim 1, characterized in that: the first air inlet is formed in the first air inlet, the second air inlet is formed in the second air inlet, the first air suction pipe is inserted into the first air inlet to form a first inserting section, the second air suction pipe is inserted into the second air inlet to form a second inserting section, and the first inserting section and the second inserting section are both provided with inclined openings.

5. The apparatus for treating boiler bottom air leakage according to claim 4, characterized in that: the first air suction pipe and the second air suction pipe are both sleeved with sealing covers, the sealing covers respectively seal the first air opening and the second air opening, and the outer diameter of each sealing cover is larger than the caliber of the first air opening and the caliber of the second air opening.

6. The apparatus for treating boiler bottom leakage air according to claim 5, wherein: transition portion top and side are equipped with the mounting groove, the sealed cowling is arranged in the mounting groove, the mounting groove with the sealed cowling passes through threaded connection.

7. The apparatus for treating boiler bottom air leakage according to claim 6, characterized in that: and a sealing layer is arranged on the inner wall of the sealing cover.

8. The apparatus for treating boiler bottom air leakage according to claim 5, characterized in that: the sealed cowling with the sealed chamber of transition portion besieged city, sealed chamber respectively with first exhaust column with the second exhaust column intercommunication.

9. The apparatus for treating boiler bottom leakage air according to claim 8, wherein: the first exhaust pipe and the second exhaust pipe are located in the sealed cavity to form a sealed section, the sealed section is evenly provided with a plurality of confluence ports along the circumferential direction, and the confluence ports are used for communicating the first exhaust pipe and the second exhaust pipe with the sealed cavity.

10. The apparatus for treating boiler bottom air leakage according to claim 9, characterized in that: the flow converging port is a long port and correspondingly and respectively extends along the extending directions of the first exhaust pipe and the second exhaust pipe.