Movable arch roof structure of a combustion furnace and construction method thereof

Abstract

A movable vault structure of a combustion furnace, comprising a furnace body steel structure of the combustion furnace vault part and a furnace lining masonry structure composed of a heat insulation layer, a refractory layer and a support component, characterized in that: the heat insulation layer and the refractory layer are fixed by the support component, the support component is connected to the furnace body steel structure, and the furnace lining masonry structure is a movable structure relative to the furnace body steel structure. The advantages of the present invention are as follows: by adopting a movable support component, the refractory layer and the heat insulation layer have a certain amount of movement during thermal expansion, offsetting the adverse effects of thermal expansion on the refractory layer, reducing the probability of the vault structure collapsing due to thermal expansion, and at the same time, Y-shaped anchoring studs are provided to prevent a collapse accident from occurring when the support component accidentally breaks.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and in particular to a movable arch roof structure and construction method of a combustion furnace. Background Art

[0002] In thermal power generation technology, the combustion furnace is an important component. The stability of the furnace lining masonry structure of the combustion furnace, especially the stability of the furnace lining masonry structure at the arch roof position of the combustion furnace, plays a very important role in the safe and stable operation of the combustion furnace. In the prior art, the furnace lining masonry structure at the arch roof position of the combustion furnace mostly adopts a furnace lining masonry structure with a refractory layer backed by a thermal insulation layer. The support components used to fix the furnace lining masonry structure are generally connected to the furnace body steel structure in a fixed manner and cannot move after pouring. When the refractory layer and the thermal insulation layer expand due to heat, since the influence of thermal expansion on the furnace lining masonry structure cannot be well eliminated, the collapse of the furnace lining masonry structure is extremely likely to occur, endangering the safe operation of the combustion furnace. In addition, in the prior art, the support components used to fix the furnace lining masonry structure do not have a heat insulation function, so further research and improvement are needed. Summary of the Invention

[0003] One of the purposes of the present invention is to provide a movable arch roof structure and construction method of a combustion furnace to reduce the influence of thermal expansion on the furnace lining masonry structure and make the operation of the combustion furnace safer.

[0004] To achieve the above object, the present invention adopts the following technical solution: A movable arch roof structure of a combustion furnace includes the furnace body steel structure of the combustion furnace arch roof part and a furnace lining masonry structure composed of a thermal insulation layer, a refractory layer, and support components. The thermal insulation layer and the refractory layer are fixed by the support components, and the support components are connected to the furnace body steel structure. The furnace lining masonry structure is a movable structure relative to the furnace body steel structure after pouring.

[0005] Among them, the support components are composed of a first hanging member, a second hanging member, and a third hanging member. The first hanging member is connected to the furnace body steel structure in a non-removable manner. The first hanging member and the second hanging member are connected in a rotatable manner to ensure that the second hanging member has mobility after the first hanging member is fixed on the furnace body steel structure. The second hanging member and the third hanging member are connected in a removable manner to facilitate the installation of the third hanging member. The second hanging member and the third hanging member are both wrapped by the thermal insulation layer, reducing the heat in the combustion furnace from being transferred outside the furnace through the support components.

[0006] Among them, the thermal insulation layer is divided into a second thermal insulation layer and a first thermal insulation layer from top to bottom; the refractory layer is divided into a second refractory layer and a first refractory layer from top to bottom.

[0007] Among them, preferably, the first hanging member is a U-shaped hoop, the second hanging member is a hanging bolt, and the third hanging member is an anchor brick. There are holes in the hanging bolt, and the U-shaped hoop passes through the holes to achieve a rotatable connection with the hanging bolt. There are threaded holes in the anchor brick, and the hanging bolt is threadedly connected to the anchor brick.

[0008] Among them, preferably, the second insulation layer is composed of rock wool, the first insulation layer is composed of insulation castable, the second refractory layer is composed of ceramic fiber board, and the first refractory layer is composed of medium-aluminum castable.

[0009] Among them, preferably, the first refractory layer is divided into multiple expansion zones according to the size of the arch top area of the combustion furnace. Expansion joints are provided between the expansion zones, and the expansion joints are filled with flexible refractory materials.

[0010] Among them, preferably, support components are provided in the expansion zones, and the arrangement of the support components is in two rows. When the arch top is inclined, the second hanging member and the third hanging member of the first row of support components from bottom to top are connected in a fixed manner. When the refractory layer expands due to heat, this arrangement can ensure that the thermal displacement direction of the refractory layer is upward along the inclined plane.

[0011] Among them, preferably, Y-shaped anchor studs are provided in the middle of the two rows of support components in the expansion zones. The Y-shaped anchor studs are fixed on the furnace body steel structure, and the first refractory layer is arranged on the Y-shaped anchor studs. The opening direction of the Y shape is along the up and down direction of the inclined plane. When the first refractory layer undergoes thermal expansion, the Y-shaped anchor studs have a certain amount of movement. When the support components are accidentally broken, the Y-shaped anchor studs can play a role in fixing the first refractory layer and prevent the collapse of the arch top structure.

[0012] Among them, preferably, when the arch top is inclined, a row of studs is provided at the uppermost part of the inclined plane in the expansion zone. The stud consists of a head and a tail, and the head is in a snake-shaped Y shape. The structure of the head increases the contact area of the first refractory layer on the stud, thereby increasing the stability of the arch top structure.

[0013] A construction method for a movable arch top structure of a combustion furnace is as follows:

[0014] (1) Connect the first hanging member and the second hanging member, and then connect the first hanging member to the arch top furnace body steel structure according to the arrangement requirements of the drawing;

[0015] (2) Connect the second hanging member and the third hanging member;

[0016] (3) According to the expansion zones divided by the drawing, formwork is supported on the lower surface of the first hanging member, and the formwork is fixed with steel wires and wooden strips;

[0017] (4) Open a hole from outside the furnace body, and pour the first refractory layer from the opening. The pouring sequence is from bottom to top, and from both sides to the middle;

[0018] (5) After the pouring of each expansion area is completed and the first refractory layer has solidified, lay flexible refractory materials at the edges and then proceed with the pouring of the next expansion area;

[0019] (6) After all the pouring of the first refractory layer is completed and it has solidified, remove the formwork supported by the lower surface of the first hanging member;

[0020] (7) Lay the second refractory layer on the upper surface of the first refractory layer through the opening on the furnace body;

[0021] (8) Pour and vibrate the first insulation layer through the opening on the furnace body;

[0022] (9) After the first insulation layer has solidified, lay the second insulation layer on the upper surface of the first insulation layer through the opening on the furnace body;

[0023] (10) After the laying of the second insulation layer is completed, seal the opening on the furnace body.

[0024] The advantages of the present invention are as follows: By adopting a movable support member, the refractory layer and the insulation layer have a certain amount of movement during thermal expansion, offsetting the adverse effects of thermal expansion on the refractory layer, reducing the probability of the arch top structure collapsing due to thermal expansion. At the same time, Y-shaped anchoring studs are provided to prevent collapse accidents from occurring when the support member breaks accidentally. Description of the Drawings

[0025] Att Figure 1 Schematic diagram of the movable arch top structure of Example 1;

[0026] Att Figure 2 Schematic diagram of the furnace lining masonry structure of Example 1;

[0027] Att Figure 3 Schematic diagram of the inclined plane of the movable arch top structure of Example 1;

[0028] Att Figure 4 Schematic diagram of the stud of Example 1. Detailed Embodiment

[0029] The following will describe the detailed embodiment of the present invention with reference to the drawings. It should be understood that the detailed embodiment described herein is only used to illustrate and explain the present invention and is not used to limit the present invention.

[0030] In the description of the present invention, unless otherwise stated, the directional terms such as "upper, lower, inner, outer" included in the terms only represent the direction of the terms in the normal use state or the common name understood by those skilled in the art, and should not be regarded as a limitation to the terms.

[0031] In the description of the present invention, in its different embodiments, among different technical features and technical solutions, as long as there is no conflict between the technical features and technical solutions, they can be used in combination with each other.

[0032] The terms "comprising", "having" and any variations thereof in the specification, claims and drawings of the present invention are intended to cover non-exclusive inclusion.

[0033] Example 1: As shown in the attached Figures 1-4 As shown, a movable arch structure of a combustion furnace includes a furnace body steel structure 1 of the combustion furnace arch part and a furnace lining masonry structure composed of a heat insulation layer 21, a refractory layer 22 and a support member 23. The heat insulation layer 21 and the refractory layer 22 are fixed by the support member 23, and the support member 23 is connected to the furnace body steel structure 1. Since there is a rotatable connection inside the support member 23, the furnace lining masonry structure is a movable structure relative to the furnace body steel structure 1 after pouring.

[0034] Among them, the support member 23 is composed of a first hanging member 231, a second hanging member 232 and a third hanging member 233. The first hanging member 231 is connected to the furnace body steel structure 1 in a non-removable manner. The first hanging member 231 and the second hanging member 232 are connected in a rotatable manner, ensuring that after the first hanging member 231 is fixed on the furnace body steel structure 1, the second hanging member 232 has mobility. The second hanging member 232 and the third hanging member 233 are connected in a removable manner, facilitating the installation of the third hanging member 233. Both the second hanging member 232 and the third hanging member 233 are wrapped by the heat insulation layer 21, reducing the transfer of heat in the combustion furnace to the outside through the support member 23.

[0035] Among them, the heat insulation layer 21 is divided into a second heat insulation layer 212 and a first heat insulation layer 211 from top to bottom; the refractory layer 22 is divided into a second refractory layer 222 and a first refractory layer 221 from top to bottom.

[0036] Among them, preferably, the first hanging member 231 is a U-shaped hoop 234, the second hanging member 232 is a hanging bolt 235, the third hanging member 233 is an anchor brick 236. A hole 237 is provided on the hanging bolt 235, and the U-shaped hoop 234 passes through the hole 237 and is rotatably connected to the hanging bolt 235. A threaded hole 238 is provided on the anchor brick 236, and the hanging bolt 235 is threadedly connected to the anchor brick 236.

[0037] Among them, preferably, the second heat insulation layer 212 is composed of rock wool, the first heat insulation layer 211 is composed of heat insulation castable, the second refractory layer 222 is composed of ceramic fiber board, and the first refractory layer 221 is composed of medium-aluminum castable.

[0038] Among them, preferably, the first refractory layer 221 is divided into multiple expansion zones 225 according to the size of the arch top area of the combustion furnace. Expansion joints 220 are provided between the expansion zones 225, and the expansion joints 220 are filled with flexible refractory materials 226.

[0039] Among them, preferably, in the expansion zone 225, support members 23 are provided. The arrangement of the support members 23 is in two rows. When the arch top is inclined, the second hanging member 232 and the third hanging member 233 of the first row of support members 23 from bottom to top are fixedly connected. When the refractory layer 22 expands thermally, this arrangement can ensure that the thermal displacement direction of the refractory layer 22 is upward along the inclined plane.

[0040] Among them, preferably, in the expansion zone 225, Y-shaped anchoring studs are provided in the middle of the two rows of support members 23. The Y-shaped anchoring studs are fixed on the furnace body steel structure 1, and the first refractory layer 221 is arranged on the Y-shaped anchoring studs. The opening direction of the Y shape is along the up and down direction of the inclined plane. When the first refractory layer 221 expands thermally, the Y-shaped anchoring studs have a certain amount of movement. When the support members 23 are accidentally broken, the Y-shaped anchoring studs can play a role in fixing the first refractory layer 221 and prevent the collapse of the arch top structure.

[0041] Among them, preferably, when the arch top is inclined, a row of studs 240 is provided at the uppermost part of the inclined plane of the expansion zone 225. The stud 240 is composed of a head 241 and a tail 242. The head 241 is in a serpentine Y shape. The structure of the head 241 increases the contact area of the first refractory layer 221 on the stud 240, thereby increasing the stability of the arch top structure.

[0042] A construction method for a movable arch top structure of a combustion furnace is as follows:

[0043] (1) Connect the first hanging member 231 and the second hanging member 232, and then connect the first hanging member 231 to the arch top furnace body steel structure 1 according to the arrangement requirements of the drawing;

[0044] (2) Connect the second hanging member 232 and the third hanging member 233;

[0045] (3) According to the expansion zones 225 divided by the drawing, formwork is supported on the lower surface of the first hanging member 231, and the formwork is fixed with steel wires and wooden strips;

[0046] (4) Open a hole from outside the furnace body, and pour the first refractory layer 221 from the opening. The pouring sequence is from bottom to top, first on both sides and then in the middle;

[0047] (5) After the pouring of each expansion zone 225 is completed, wait for the first refractory layer 221 to solidify. Flexible refractory materials 226 are laid at the edges, and then the pouring work of the next expansion zone 225 is carried out;

[0048] (6) After the entire first refractory layer 221 is poured and solidified, remove the formwork supported by the lower surface of the first hanging member 231;

[0049] (7) Lay the second refractory layer 222 on the upper surface of the first refractory layer 221 from the opening outside the furnace body;

[0050] (8) Pour and vibrate the first insulation layer 211 from the opening outside the furnace body;

[0051] (9) After the first insulation layer 211 solidifies, lay the second insulation layer 212 on the upper surface of the first insulation layer 211 from the opening outside the furnace body;

[0052] (10) After the second insulation layer 212 is laid, seal the opening outside the furnace body.

[0053] Of course, the above is only the preferred embodiment of the present invention, and it does not limit the scope of use of the present invention. Therefore, all equivalent changes made on the principle of the present invention should be included in the protection scope of the utility model.

Claims

1. An adjustable arch structure of a combustion furnace, comprising a furnace body steel structure of the combustion furnace arch part and a furnace lining masonry structure composed of a heat insulation layer, a refractory layer and a support component, characterized in that: The thermal insulation layer and the refractory layer are fixed by support components. The support components are connected to the steel structure of the furnace body. The furnace lining masonry structure is a movable structure relative to the steel structure of the furnace body. The support components are composed of a first hanging part, a second hanging part, and a third hanging part. The first hanging part is fixedly connected to the steel structure of the furnace body. The first hanging part and the second hanging part are connected in a rotatable manner. The second hanging part and the third hanging part are connected in a detachable manner. The first hanging part is a U-shaped hoop, the second hanging part is a hanging bolt, and the third hanging part is an anchor brick. The hanging bolt is provided with holes. The U-shaped hoop passes through the holes and is connected to the hanging bolt. The anchor brick is provided with threaded holes. The hanging bolt and the anchor brick are connected by threads.

2. The movable arch roof structure of a combustion furnace according to claim 1, characterized in that: The thermal insulation layer is divided into a second thermal insulation layer and a first thermal insulation layer from top to bottom. The refractory layer is divided into a second refractory layer and a first refractory layer from top to bottom.

3. The movable arch roof structure of a combustion furnace according to claim 2, characterized in that: The second thermal insulation layer is composed of rock wool, the first thermal insulation layer is composed of thermal insulation castable, the second refractory layer is composed of ceramic fiber board, and the first refractory layer is composed of medium-aluminum castable.

4. The movable arch top structure of a combustion furnace according to claim 2, characterized in that: The first refractory layer is divided into multiple expansion zones according to the size of the arch top area of the combustion furnace. Expansion joints are provided between the expansion zones, and the expansion joints are filled with flexible refractory materials.

5. The movable arch roof structure of a combustion furnace according to claim 4, characterized in that: Support components are provided in the expansion zones. The arrangement of the support components is in two rows. When the arch top is inclined, the second hanging part and the third hanging part of the first row of support components from bottom to top are connected in a fixed manner.

6. The movable arch roof structure of a combustion furnace according to claim 4, characterized in that: Y-shaped anchoring studs are provided in the middle of the two rows of support components in the expansion zones. The Y-shaped anchoring studs are fixed on the steel structure of the furnace body. The first refractory layer is arranged on the Y-shaped anchoring studs. The opening direction of the Y shape is along the up and down direction of the inclined plane.

7. The movable arch roof structure of a combustion furnace according to any one of claims 1-6, characterized in that: When the arch top is inclined, a row of studs is provided at the uppermost part of the inclined plane in the expansion zone. The stud consists of a head and a tail. The head is in a snake-shaped Y shape.

8. The construction method of a movable arch roof structure of a combustion furnace as described in claim 1, characterized in that: The method is as follows: (1) Connect the first hanging part and the second hanging part, and then connect the first hanging part to the arch top furnace body steel structure according to the arrangement requirements of the drawing; (2) Connect the second hanging part and the third hanging part; (3) According to the expansion zones divided by the drawing, formwork is supported on the lower surface of the first hanging part, and the formwork is fixed with steel wires and wooden strips; (4) Open a hole from outside the furnace body, and pour the first refractory layer from the opening. The pouring sequence is from bottom to top, and from both sides to the middle; (5) After pouring each expansion zone is completed and the first refractory layer has solidified, lay flexible refractory materials at the edge, and then carry out the pouring work of the next expansion zone; (6) After all the first refractory layer has been poured and solidified, remove the formwork supported on the lower surface of the first hanging part; (7) Lay the second refractory layer on the upper surface of the first refractory layer from the opening outside the furnace body; (8) Pour and vibrate the first thermal insulation layer from the opening outside the furnace body; (9) After the first thermal insulation layer has solidified, lay the second thermal insulation layer on the upper surface of the first thermal insulation layer from the opening outside the furnace body; (10) After the second thermal insulation layer is laid, close the opening outside the furnace body.

Images