CN116221762A

CN116221762A - Boiler and heat preservation method thereof

Info

Publication number: CN116221762A
Application number: CN202310215264.8A
Authority: CN
Inventors: 张文刚; 权素维; 柴尚荣; 赵培尧; 李津; 王晓瑜; 孙岳; 王猛; 侯荣利
Original assignee: Guoneng Shanxi Hequ Power Generation Co ltd; National Energy Group Guoyuan Power Co Ltd
Current assignee: Guoneng Shanxi Hequ Power Generation Co ltd; National Energy Group Guoyuan Power Co Ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-06-06

Abstract

The present disclosure relates to a boiler and a heat preservation method of the boiler, wherein the heat preservation method comprises: laying a heat-insulating cotton plate on a heat-insulating basal plane of the boiler to form a cotton laying layer; and spraying heat-insulating cotton material on the heat-insulating cotton plate to form a cotton spraying layer. Because the heat preservation cotton board of spreading cotton layer is the prefabrication, set up the efficiency of spreading cotton layer and be higher than the cotton efficiency of spouting, and the cost is less than the cotton layer of spouting. Therefore, under the condition that the heat preservation requirements of the boiler are the same (the thickness of the whole cotton layer is unchanged), the thickness of the cotton spraying layer can be reduced by arranging the heat preservation cotton plate in advance, so that the cotton spraying amount is reduced, the problems that cotton is not easy to hang on a heat preservation base surface and the cotton is unstable due to too much cotton spraying are avoided, and in addition, the heat preservation cotton material is sprayed on the heat preservation cotton plate more stably than the heat preservation base surface of the boiler. According to the scheme, the efficiency of arranging the heat insulation layer is improved, the heat insulation cost of the boiler is reduced, the problems of overheating of the boiler, ash leakage of the top of the boiler and the like are solved, and the thermal efficiency of the boiler equipment is improved.

Description

Boiler and heat preservation method thereof

Technical Field

The disclosure relates to the technical field of boiler heat preservation, in particular to a boiler and a heat preservation method of the boiler.

Background

At present, in the sealing heat preservation technology of a power plant boiler, cotton spraying is generally adopted to carry out sealing heat preservation on the boiler, and the thickness of the cotton spraying needs to be adjusted according to the sealing heat preservation requirement of the boiler. However, the cotton spraying technology is low in efficiency and high in cost. When the sprayed cotton reaches the preset thickness required by heat preservation, the heat preservation basal plane to be heat preserved of the boiler body also has the problems of difficult cotton hanging and unstable cotton hanging.

Disclosure of Invention

A first object of the present disclosure is to provide a heat preservation method of a boiler, which at least partially solves the technical problems existing in the related art,

a second object of the present disclosure is to provide a boiler to which the heat preservation method of the boiler provided by the present disclosure is applied.

In order to achieve the above object, a first aspect of the present disclosure provides a heat preservation method of a boiler, the heat preservation method comprising:

laying a heat-insulating cotton plate on a heat-insulating basal plane of the boiler to form a cotton laying layer; and

and spraying heat-insulating cotton material on the cotton spreading layer to form a cotton spraying layer.

Optionally, the method further comprises:

before laying the heat-insulating cotton plate, vertically fixing a plurality of first fixing rods and a plurality of second fixing rods on the heat-insulating base surface, wherein the length of the first fixing rods is larger than the preset thickness of the cotton laying layer, and the length of the second fixing rods is larger than the sum of the preset thicknesses of the cotton laying layer and the cotton spraying layer;

after the heat-insulating cotton plate is paved, the heat-insulating cotton plate is pressed onto the heat-insulating basal plane through a first pressing sheet fixed on the first fixing rod;

after cotton spraying, the cotton spraying layer is pressed onto the cotton spreading layer through a second pressing sheet fixed on the second fixing rod.

Optionally, the first fixing rod and the second fixing rod are respectively configured into an L-shaped structure, and the horizontal sections of the first fixing rod and the second fixing rod are respectively welded on the heat insulation base surface.

Optionally, the step of spraying a thermal insulation cotton material on the cotton spreading layer to form a cotton spraying layer comprises the following steps:

spraying cotton to the cotton spreading layer to spray heat-insulating cotton;

pressing, pressing and trowelling the heat-insulating cotton material sprayed on the cotton spreading layer,

wherein the cotton spraying treatment and the pressing treatment are alternately operated.

Optionally, the heat-insulating cotton material is prepared by mixing aluminum silicate cotton and an adhesive.

Optionally, the step of laying a thermal insulation cotton board on a thermal insulation base surface of the boiler to form a cotton laying layer, the method comprising: lay first shop cotton layer and second shop cotton layer in proper order, wherein, first shop cotton layer with the second shop cotton layer includes the polylith concatenation respectively the thermal insulation cotton board, just first shop cotton layer with the second shop cotton layer the thermal insulation cotton board seam staggers.

Optionally, the heat insulation cotton plate is an aluminum silicate cotton plate.

Optionally, the method further comprises covering a protective net on one side of the cotton spraying layer away from the heat insulation base surface.

Optionally, the protective net is formed by splicing a plurality of galvanized iron wire net plates.

A second aspect of the present disclosure provides a boiler comprising a boiler body and an insulation structure for insulating the boiler body, the insulation structure being formed by a method according to any one of the above.

Through above-mentioned technical scheme, adopt the heat preservation method that this disclosure provided to seal the boiler and keep warm, because the heat preservation cotton board on cotton layer of shop is the prefab, set up the efficiency on cotton layer of shop and be higher than spouting cotton efficiency, and the cost is less than spouting cotton layer. Therefore, under the condition that the heat preservation requirements of the boiler are the same (the thickness of the whole cotton layer is unchanged), the thickness of the cotton spraying layer can be reduced by arranging the heat preservation cotton plate in advance, so that the cotton spraying amount is reduced, the problems that cotton is not easy to hang on a heat preservation base surface and the cotton is unstable due to too much cotton spraying are avoided, and in addition, the heat preservation cotton material is sprayed on the heat preservation cotton plate more stably than the heat preservation base surface of the boiler. According to the scheme, the efficiency of arranging the heat insulation layer is improved, the heat insulation cost of the boiler is reduced, the problems of overheating of the boiler, ash leakage of the top of the boiler and the like are solved, and the thermal efficiency of the boiler equipment is improved.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

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

FIG. 1 is a schematic view of a boiler insulation structure provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic view of a partial structure of a boiler insulation structure provided in an exemplary embodiment of the present disclosure;

FIG. 3 is a flow chart of a method of maintaining a temperature of a boiler provided in an exemplary embodiment of the present disclosure;

fig. 4 is a flowchart of a heat preservation method of a boiler according to another exemplary embodiment of the present disclosure.

Description of the reference numerals

10-a heat preservation basal plane; 20-laying a cotton layer; 20 a-a heat-insulating cotton plate; 21-a first cotton spreading layer; 22-a second cotton laying layer; 30-spraying cotton layer; 41-a first fixing rod; 42-a second fixing rod; 51-first tabletting; 52-second tabletting; 60-protective net.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise stated, terms of orientation such as "top", "bottom", "horizontal" and "vertical" are used based on the definition of fig. 1. The terms such as "first," "second," and the like, as used in this disclosure, are used for distinguishing one element from another and not necessarily for order or importance. Furthermore, the following description, when taken in conjunction with the accompanying drawings, like reference numerals designate the same or similar elements in different drawings.

Referring to fig. 1 and 3, the present disclosure provides a heat insulation method of a boiler, the heat insulation method including laying a heat insulation cotton plate 20a on a heat insulation base surface 10 of the boiler to form a cotton laying layer 20, i.e., step S101; then, the insulation cotton material is sprayed on the insulation cotton board 20a to form the sprayed cotton layer 30, i.e. step S102. It should be noted that, the heat insulation base surface 10 of the boiler may be other parts to be insulated such as a furnace top and a furnace wall of the boiler, and the impurity cleaning may be performed on the heat insulation base surface 10 before the heat insulation is performed on the heat insulation base surface Wen Jimian, and then the heat insulation cotton board 20a is laid on the bottom of the heat insulation base surface 10 smoothly and firmly. The heat-insulating cotton material can be sprayed through special spraying equipment, after the cotton layer 30 is formed, the heat-insulating base surface is communicated with the cotton layer 20 and the cotton layer 30 to form a whole, so that heat dissipation of a boiler through a joint is effectively avoided.

Through above-mentioned technical scheme, adopt the heat preservation method that this disclosure provided to seal the boiler and keep warm, because the heat preservation cotton board 20a of spreading cotton layer 20 is the prefabrication piece, set up the efficiency of spreading cotton layer 20 and be higher than spouting cotton efficiency, and the cost is less than spouting cotton layer 30. Therefore, under the condition that the heat insulation requirements of the boiler are the same (the thickness of the whole cotton layer is unchanged), the thickness of the cotton spraying layer 30 can be reduced by arranging the heat insulation cotton plates 20a in advance, so that the cotton spraying amount is reduced, the problems that the heat insulation base surface 10 is not easy to hang cotton and the cotton hanging is unstable due to excessive cotton spraying are avoided, and in addition, the heat insulation cotton material is sprayed on the heat insulation cotton plates 20a more stably compared with the condition of being directly sprayed on the heat insulation base surface 10 of the boiler. According to the scheme, the efficiency of arranging the heat insulation layer is improved, the heat insulation cost of the boiler is reduced, the problems of overheating of the boiler, ash leakage of the top of the boiler and the like are solved, and the thermal efficiency of the boiler equipment is improved.

Referring to fig. 1 and 4, the method provided by the present disclosure may further include a step S103 of vertically fixing the plurality of first fixing bars 41 and the plurality of second fixing bars 42 on the protector Wen Jimian 10 before the insulation board 20a is laid. Wherein, the length of the first fixing rod 41 may be greater than the predetermined thickness of the blanket 20, and the length of the second fixing rod 42 may be greater than the sum of the predetermined thicknesses of the blanket 20 and the spray cotton layer 30. After step S101 is completed, step S104 may be performed, in which the insulation board 20a is pressed onto the insulation base surface 10 by the first pressing piece 51 fixed to the first fixing lever 41, so as to reduce the gap between the insulation board 20a and the insulation base surface 10 at most, thereby improving the sealing and insulation effects on the insulation base surface 10. It should be noted that, the insulation board 20a may be an aluminum silicate cotton board, and because the aluminum silicate cotton material is soft and has a certain density, after the insulation board 20a is laid and before the first pressing piece 51 is installed, the first fixing rod 41 is penetrated and pressed on the insulation base 10 by the first fixing rod 41, and the first fixing rod 41 may not be separated from the insulation base 10 by virtue of a friction force with the first fixing rod 41. After the step S102 is completed, step S105 may be performed, in which the sprayed cotton layer 30 is compressed onto the blanket 20 by the second compression sheet 52 fixed to the second fixing rod 42, so that the gap between the sprayed cotton layer 30 and the blanket 20 can be reduced at most, thereby ensuring the sealing and heat-insulating effects on the heat-insulating base surface 10.

According to some embodiments provided by the present disclosure, a distance between the plurality of first fixing bars 41 and the plurality of second fixing bars 42 may be not more than 300mm, a total number of the first fixing bars 41 and the second fixing bars per square meter area may be not less than 9, and a ratio of the numbers of the first fixing bars 41 and the second fixing bars 42 is 7:3, thereby ensuring the stability of fixing the cotton spreading layer 20 and the cotton spraying layer 30. It should be noted that, the specific number of the first fixing rod 41 and the second fixing rod is not limited in the present disclosure, and the heat insulation requirement of the heat insulation base surface 10 may be satisfied.

Referring to fig. 1, the first and second fixing bars 41 and 42 may be respectively constructed in an L-shaped structure, i.e., an inverted L-shaped structure as shown in fig. 1, i.e., a horizontal section is located at the top end of the L-shaped structure. The horizontal sections of the first fixing rod 41 and the second fixing rod 42 are welded on the bottom surface of the heat insulation base surface 10 respectively, so that the first fixing rod 41 and the second fixing rod 42 can have larger contact area with the heat insulation base surface 10, the connection strength between the first fixing rod 41 and the second fixing rod 42 and the heat insulation base surface 10 can be ensured, and the fixing effect of the first fixing rod 41 on the cotton spreading layer 20 and the second fixing rod 42 on the cotton spraying layer 30 and the cotton spreading layer 20 is improved.

Referring to fig. 4, according to some embodiments provided by the present disclosure, the step of spraying insulation cotton material on the cotton spreading layer 20 to form the cotton spraying layer 30, i.e., step S102 may include a cotton spraying process and a bonding process. The cotton spraying treatment is used for spraying the heat insulation cotton material onto the cotton spreading layer 20, and the heat insulation cotton material can be uniformly sprayed onto the heat insulation cotton board 20a through the spraying machine, and it is required to ensure the sealing heat insulation effect, so that the thickness of the cotton spraying layer 30 is consistent, and the heat insulation cotton material on the heat insulation cotton board 20a is required to be uniformly sprayed. The pressing process is used for pressing and trowelling the heat-insulating cotton material sprayed on the cotton spreading layer 20, and the surface of the heat-insulating cotton material sprayed on the heat-insulating cotton board 20a can be compacted and trowelled through the pressing plate. The cotton spraying treatment and the pressing treatment can be alternatively operated, namely the cotton spraying layer 30 can also be constructed in a layer-by-layer cotton spraying mode, so that the heat preservation cotton material sprayed on the cotton spreading layer 20 can form the crack-free and integrally stable and airtight cotton spraying layer 30 with certain strength and thickness after being dried.

According to some embodiments provided by the present disclosure, the insulation wool may be made of aluminum silicate wool mixed with an adhesive. The heat-insulating cotton material is made of aluminum silicate cotton, so that the cotton spraying layer 30 can have the characteristics of fire prevention, heat preservation, high temperature resistance, sound absorption and noise reduction. The high-temperature adhesive can be prepared from silica sol and water, and can form a hard gel structure after drying and curing, so that the high-temperature adhesive can generate high adhesiveness, and the stability of the structure of the cotton spraying layer 30 is ensured.

Referring to fig. 1 to 4, in the step of laying the insulation board 20a on the insulation base surface 10 of the boiler to form the cotton laying layer 20, that is, step S101 may include the step of sequentially laying the first cotton laying layer 21 and the second cotton laying layer 22. Wherein, first shop cotton layer 21 and second shop cotton layer 22 can include the heat preservation cotton board 20a of polylith concatenation respectively, spread cotton layer 20 like this can be constructed to by upper and lower two-layer heat preservation cotton board 20a range upon range of heat preservation layer that sets up to make spread cotton layer 20 inflation digestibility good, equipment thermal expansion volume can digest by oneself completely when the boiler operation, can not take place thermal expansion fracture, deformation problem because of not leaving the inflation clearance. In this embodiment, the first cotton layer 21 and the second cotton layer 22 may be formed of one layer of insulation board 20a in the vertical direction, and in other embodiments, the first cotton layer 21 and the second cotton layer 22 may be formed of multiple layers of insulation boards 20a in the vertical direction. The insulation boards 20a of the first and second cotton-laying

layers

21 and 22 may be seam-staggered, and specifically, the crimp length of the insulation boards 20a of the first and second cotton-laying

layers

21 and 22 may be not less than 100mm, so that the interval between adjacent two insulation boards 20a in the first cotton-laying layer 21 may be sealed by the insulation boards 20a in the second cotton-laying layer 22. Meanwhile, the positions with gaps between two adjacent heat-insulating cotton boards 20a can be filled with crushed aggregates of the heat-insulating cotton boards 20a tightly, so that the sealing heat-insulating effect is ensured. In the present disclosure, in order to avoid the risk that a gap is formed at a position where the insulation board 20a is penetrated by the above-mentioned first fixing rod 41, thereby resulting in a poor sealing insulation effect, the gap may also be compacted with crushed aggregates of the insulation board 20 a.

According to some embodiments provided by the present disclosure, the insulation board 20a may be an aluminum silicate cotton board, so that the insulation board 20a has the above-mentioned beneficial effects made of aluminum silicate cotton, which are not described herein.

Referring to fig. 1 and 4, the thermal insulation method provided in the present disclosure may further include covering a protective net 60 on a side of the cotton spray layer 30 remote from the thermal insulation base 10. The cotton laying layer 20 and the cotton spraying layer 30 can be further fixed by covering the protective net 60, thereby effectively preventing the cotton laying layer 20 and the cotton spraying layer 30 from deforming and falling off. Specifically, the sprayed cotton layer 30 needs to keep good ventilation and drying after the spraying is finished, and after the sprayed cotton layer 30 is cured for 72 hours, the protective net 60 is additionally arranged to fix the sprayed cotton layer 30 and the cotton spreading layer 20. When the protective screen 60 is mounted at a preset position, the second fixing rod 42 provided by the present disclosure further passes through the protective screen 60 in the vertical direction, that is, before step 105, the protective screen 60 can be pressed onto the cotton spraying layer 30 by the second pressing sheet 52 fixed on the second fixing rod 42, so that the protective screen 60 and the cotton spraying layer 30 can be tightly attached to each other, and further, the sealing and heat-insulating effects on the heat-insulating base surface 10 are ensured.

According to some embodiments provided by the present disclosure, the protective mesh 60 may be formed by splicing a plurality of galvanized wire mesh sheets. The galvanized iron wire net plate can be a loose-mouth galvanized iron wire net with the iron wire diameter of 1.6mm and the mesh size of 20 multiplied by 20 mm. The junction interface of two adjacent galvanized iron wire mesh plates can be mutually butted, namely, the broken ends of the two adjacent galvanized iron wire mesh plates are mutually wound, so that the broken ends are prevented from being exposed to avoid cutting the cotton spraying layer 30, and the cotton spraying layer 30 and the cotton spreading layer 20 are more comprehensively protected. Meanwhile, when maintenance work such as replacement of a certain iron wire mesh plate or a plurality of iron wire mesh plates is needed, workers only need to carry the galvanized iron wire mesh plates with corresponding numbers to replace, the whole protective net 60 is prevented from being replaced and maintained, the efficiency of the workers is improved, and the protective effect of the whole protective net 60 in partial maintenance is also ensured.

The second aspect of the present disclosure also provides a boiler, which includes a boiler body and a heat insulation structure for insulating the boiler body, the heat insulation structure may be formed by the above method and has all the advantages of the method provided by the present disclosure, and will not be described herein.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure. In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. A method of insulating a boiler, the method comprising:

2. The method of claim 1, further comprising:

3. The insulation method according to claim 2, wherein the first fixing rod and the second fixing rod are respectively constructed in an L-shaped structure, and the horizontal sections of the first fixing rod and the second fixing rod are respectively welded on the insulation base surface.

4. The insulation method of claim 2, wherein the step of spraying insulation cotton material onto the cotton layer to form a sprayed cotton layer comprises:

spraying cotton to the cotton spreading layer to spray heat-insulating cotton;

5. The method of claim 4, wherein the insulating wool material is made of aluminum silicate wool and an adhesive.

6. The insulation method according to claim 1, characterized by the step of laying an insulation cotton board on the insulation base surface of the boiler to form a cotton layer, the method comprising:

lay first shop cotton layer and second shop cotton layer in proper order, wherein, first shop cotton layer with the second shop cotton layer includes the polylith concatenation respectively the thermal insulation cotton board, just first shop cotton layer with the second shop cotton layer the thermal insulation cotton board seam staggers.

7. The method of claim 6, wherein the insulation board is an aluminum silicate cotton board.

8. The method of claim 1, further comprising masking a protective mesh on a side of the sprayed cotton layer remote from the insulation base.

9. The method of claim 8, wherein the protective mesh is formed by splicing a plurality of galvanized wire mesh sheets.

10. A boiler, characterized in that it comprises a boiler body and a heat insulating structure for insulating the boiler body, which heat insulating structure is formed by the method according to any one of claims 1-9.