CN212315913U

CN212315913U - Expansion joint processing structure for melting furnace arch top

Info

Publication number: CN212315913U
Application number: CN202022094173.8U
Authority: CN
Inventors: 陈营鸽; 赵涛涛; 陶明林
Original assignee: CSG Holding Co Ltd; Wujiang CSG Glass Co Ltd
Current assignee: CSG Holding Co Ltd; Wujiang CSG Glass Co Ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-01-08
Anticipated expiration: 2030-09-22

Abstract

The utility model discloses a melting furnace arch crown expansion joint processing structure, the upper expansion joint and the lower expansion joint which are arranged up and down relatively are arranged on the big arch brick, a mark brick is arranged between the upper expansion joint and the lower expansion joint, so that the upper expansion joint and the lower expansion joint are not communicated, the melting furnace arch crown expansion joint processing structure is characterized in that the processing structure comprises a welding patch layer arranged in the lower expansion joint, a first filling layer arranged above the mark brick and at least one zero expansion silica brick arranged on the first filling layer, a second filling layer is arranged between the zero expansion silica brick and the inner side wall of the upper expansion joint, and the upper surface of the zero expansion silica brick and the upper surface of the second filling layer are all flush with the upper surface of the big arch brick; the welding repair layer is formed by heating and curing the welding repair material, and the first filling layer and the second filling layer are formed by curing amorphous fillers. The utility model discloses a melting furnace arch top expanding joint processing structure solves the unable heat preservation that covers of arch top expanding joint department, causes the problem of melting furnace heat loss, energy waste, reduces the probability that arch top expanding joint department burns out, extension melting furnace life.

Description

Expansion joint processing structure for melting furnace arch top

Technical Field

The utility model relates to a glass production field especially relates to a melting furnace arch top expansion joint processing structure.

Background

The existing glass production melting furnace crown is provided with a thermal expansion gap which is reserved for preventing the melting furnace from being damaged and destroyed by thermal expansion in the design and construction process. The expansion joint sealing by adopting the traditional sealing mode can easily cause ablation air leakage in the use process of a subsequent melting furnace, so that the defects of furuncle, tumor, calculus, line and the like of glass are caused, the glass yield is seriously influenced, and the later maintenance and maintenance cost is huge.

The expansion joint refers to a thermal expansion gap reserved in the design and construction process of the glass melting furnace, namely, the thermal expansion gap reserved in advance for preventing the melting furnace from being damaged and destroyed by thermal expansion is called expansion joint for short, and various refractory bricks used by the glass melting furnace expand by heating from a normal temperature state during construction to a high temperature state during normal operation. The expansion gap is an important structural form of the glass melting furnace and is also a structural form which is very concerned by related personnel. Improper treatment of expansion joint design, construction, kiln baking and the like can directly damage the glass melting furnace. When the expansion joint is too big, can not be closed well behind the roasting kiln, equal to artificially having opened a seam on the brickwork, having increaseed the erosion rate of the brick body, reduced the intensity of brickwork, cause phenomenons such as air leakage, the production of direct influence glass product, likewise, the expansion joint undersize can cause the brick material to be heated and explode and split, and the brickwork fracture can cause the deformation of steel construction and brickwork and influence normal production when serious to direct influence the operation safety and the life of melting furnace. In practice, the examples of the quality defect and quality accident of the melting furnace caused by improper expansion joint treatment are many, and the harm caused by improper expansion joint treatment is obvious.

The main crown of the melting furnace is a key part of the melting furnace and is built by high-quality silica bricks. The transverse expansion of the main arch is controlled by the stay in the heating process, and an expansion gap must be reserved for the longitudinal expansion. The small-sized kiln is provided with expansion joints at two ends, the large-sized kiln is divided into a plurality of sections, the expansion joints are arranged between the sections, the uniform expansion of the main arch is facilitated, the width of the expansion joints is determined according to the longitudinal expansion amount of each arch, and the expansion joints are not directly related to the shape and thickness of the silica bricks. For the convenience of construction, parallel seams with consistent width are usually reserved on the main arch expansion seam.

The expansion joint structure between the main arch joint and the joint is convenient for construction, the width of the reserved expansion joint is larger than the expansion amount, in order to facilitate expansion, a processed standard brick is covered on the expansion joint, and then the expansion joint is sealed by a silicon hot-patch layer 10, referring to fig. 4 and 5, the method has the following defects: 1) the siliceous hot-melt adhesive adopted by the method has great difference with high-quality silica bricks on the arch crown in the aspects of component composition, sintering temperature, density and the like, and the hot-melt adhesive is difficult to form a compact structure with the silica bricks, so that in the using process of the melting furnace, the heat of the melting furnace is firstly dissipated outwards through the expansion joint of the main arch joint due to the influence of factors such as furnace pressure fluctuation or over-high temperature and the like, and the phenomena of air leakage, ablation and the like are caused; 2) after the kiln is stabilized, the lower expansion joint has a space, and gas in the kiln can impact the lower expansion joint to corrode the arch bricks in the subsequent use of the kiln; 3) after the hot filling material is filled, in order to conveniently observe the expansion joint ablation condition of the main arch joint during the heat preservation of the arch top of the melting furnace, the expansion joint of the main arch joint is reserved without heat preservation, so that the heat preservation effect of the arch top of the melting furnace is greatly reduced, the heat waste is caused, and the energy consumption of the melting furnace is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the prior art, the utility model provides a melting furnace arch crown expansion joint processing structure aims at solving the unable heat preservation that covers of arch crown expansion joint department, causes the problem that the melting furnace heat scatters and disappears, energy waste to reduce the probability that arch crown expansion joint department burns and loses, extension melting furnace life reduces because the defect that the expansion joint department burns and loses and cause, technical scheme is as follows:

the utility model provides a melting furnace arch crown expansion joint processing structure, the relative upper expansion joint and the lower expansion joint that set up from top to bottom are provided with on the big arch brick, be provided with the mark brick between upper expansion joint and the lower expansion joint, make upper expansion joint and lower expansion joint not link up, processing structure is including setting up the repair welding layer in the lower expansion joint, setting up the first filling layer on the mark brick and setting up at least one zero expansion silica brick on the first filling layer, be provided with the second filling layer between the inside wall of zero expansion silica brick and upper expansion joint, the upper surface of zero expansion silica brick, the upper surface of second filling layer all level with the upper surface of big arch brick; the welding repair layer is formed by heating and curing welding repair materials, and the first filling layer and the second filling layer are formed by curing amorphous fillers.

Further, the thickness of the first filling layer is set to be 10-15 cm.

Further, the processing structure further comprises a heat insulation layer arranged on the main arch brick, and the heat insulation layer comprises a sealing layer arranged on the zero-expansion silica brick and the second filling layer, a heat insulation brick arranged on the sealing layer and a heat insulation coating layer arranged on the heat insulation brick.

Further, the inner side wall of the upper expansion joint is of an L-shaped structure or an inclined structure.

Further, the zero expansion silica brick is of a cubic structure.

Further, the sealing layer comprises a siliceous sealant.

The utility model provides a beneficial effect that technical scheme brought as follows:

a. the utility model provides a melting furnace arch top expansion joint processing structure, through setting up weld patch layer, first filling layer, second filling layer, zero inflation commentaries on classics, can solve the arch top expansion joint department can't cover the heat preservation, cause the problem that melting furnace heat scatters and loses, energy is wasted, and reduce the probability that the arch top expansion joint department burns and loses, prolong melting furnace life, reduce because the defect that the expansion joint department burns and loses, improve glass output and quality;

b. the novel processing structure provided by the utility model can seal the expansion joint between the main arch joints of the melting furnace, so that the secondary shrinkage can not occur in the use process, and the risk of causing the joint is avoided;

c. the utility model provides a novel processing structure can lay the heat preservation above the expansion joint, realizes the whole sealing and whole full coverage heat preservation of the arch top of the kiln body, compared with the traditional mode, can greatly promote the heat preservation effect of the melting furnace, reduces the energy consumption, simultaneously, reduces the probability that the expansion joint of the arch top is burnt out, reduces the generation of defects; can obviously save the cost for the operation of the melting furnace.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a cross-sectional view of a crown expansion joint of a melting furnace before roasting;

FIG. 2 is a cross-sectional view of a bulging joint processing structure of a crown of a melting furnace provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the expanding seam processing structure of the melting furnace arch top covered with the heat insulating layer according to the embodiment of the present invention;

FIG. 4 is a cross-sectional view of a conventional expanding joint processing structure of a melting furnace crown without a heat-insulating layer;

FIG. 5 is a cross-sectional view of a conventional expanding seam processing structure of a melting furnace crown covered with an insulating layer.

Wherein the reference numerals include: 1-upper expansion joint, 2-lower expansion joint, 3-weld repair layer, 4-first filling layer, 5-zero expansion silica brick, 6-second filling layer, 7-big arch brick, 8-standard brick, 9-heat preservation layer, 91-sealing layer, 92-heat preservation brick, 93-heat preservation coating layer and 10-heat repair layer.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

In an embodiment of the utility model, a melting furnace arch crown expansion joint processing structure is provided, refer to fig. 2 and fig. 3, be provided with relative up-down last expansion joint 1 and lower expansion joint 2 that set up on big arch brick 7, be provided with mark brick 8 between last expansion joint 1 and the lower expansion joint 2 for it does not link up to go up expansion joint 1 and lower expansion joint 2.

The specific structure of the processing structure is as follows: the processing structure comprises a welding repair layer 3 arranged in the lower expansion joint 2, a first filling layer 4 arranged above the standard brick, and at least one zero expansion silica brick 5 arranged on the first filling layer 4. The left and right sides of zero inflation silica brick all do not contradict and go up two inside walls in the left and right sides of expansion joint, the left side of zero inflation silica brick does not contradict the left inside wall of expansion joint promptly, and the right side of zero inflation silica brick does not contradict the right inside wall of expansion joint.

The lower expansion joint 2 in the original structure is of a hollow structure, and the problem exists that in the use process of the melting furnace, heat can be dissipated outwards through the expansion joint of the main crown joint due to the influence of factors such as furnace pressure fluctuation or over-high temperature and the like, so that the phenomena of air leakage, ablation and the like are caused, and even if the upper expansion joint 1 is filled with hot supplementary materials, the ablation phenomenon can also occur.

The repair welding layer 3 is formed by heating and solidifying the repair welding material, the repair welding material is similar to the silicon brick of the arch top in the aspects of component composition, sintering temperature, density and the like, and the repair welding material can be directly purchased in the market. The welding material is high temperature resistant and sintering resistant, has good erosion resistance, melts to the optimal state with the inner side wall of the lower expansion joint (arch brick belongs to refractory material) of the melting furnace part needing welding material and has stronger welding fastness (the welding material is firmly connected with the inner side wall of the lower expansion joint, so that the welding material can not break away from the lower expansion joint, the welding is firm, no gap or space can be generated, the welding layer 3 is arranged, gas in the kiln can be prevented from passing through, the corrosion and the deformation are reduced, the expansion joint can be prevented from being burnt, the heat is prevented from being dissipated outwards, the damage caused by the damage of the industrial kiln is reduced, and the use cost of the industrial kiln can be reduced.

The mark brick top is provided with first filling layer 4, be provided with at least one zero inflation silica brick 5 on the first filling layer 4, be provided with second filling layer 6 between zero inflation silica brick 5 and the last 1 inside walls that expand, first filling layer 4 and second filling layer 6 are formed by amorphous filler solidification back, and it is refractory material, like cement, form after the solidification that can directly purchase on the market. The amorphous filler is a high-silicon non-expansion low-shrinkage quartz casting material which has the characteristics of non-expansion and low shrinkage. The amorphous filler covers the standard brick and the bottom of the upper expansion joint, and the first filling layer 4 and the second filling layer 6 are arranged to fill the upper expansion joint 1, so that the zero-expansion silica brick is firmly bonded with the inner side wall of the upper expansion joint 1 and cannot shake; meanwhile, no gap or space is formed in the upper expansion joint 1.

The upper surface of the zero-expansion silica brick 5 and the upper surface of the second filling layer 6 are flush with the upper surface of the main arch brick 7, so that a heat-insulating layer can be conveniently added subsequently.

The standard brick is used for preventing the amorphous filler from falling into the lower expansion joint when the space of the upper expansion joint is filled with the first filling layer 4 and the second filling layer 6. The thickness of the zero expansion silica bricks is selected according to the height and the width of the upper expansion joint, no matter one or more zero expansion silica bricks are placed, the uppermost zero expansion silica brick needs to be flush with the upper surface of the crown brick after being placed, so that a heat insulation layer can be conveniently added subsequently, and the specific structure is shown in fig. 2 and fig. 3.

Arranging an insulating layer 9 on the main arch brick, wherein the insulating layer 9 comprises a sealing layer 91 arranged on the zero-expansion silica brick and the second filling layer 6, an insulating brick 92 arranged on the sealing layer 91 and an insulating coating layer 93 arranged on the insulating brick 92, and the sealing layer 91 is a siliceous sealing material such as silicate; the insulating brick and the insulating coating layer can be purchased in the market. After the heat-insulating layer is laid on the main arch brick, the integral sealing of the arch top of the kiln body is realized, compared with the traditional mode, the heat-insulating layer can be laid on the zero-expansion silica brick and the second filling layer 6, the heat-insulating effect of the melting furnace is greatly improved, the energy consumption is reduced, meanwhile, the probability of burning damage of the expansion joint of the arch top is reduced, and the generation of defects is reduced; can obviously save the cost for the operation of the melting furnace.

In the original structure, the upper expansion joint uses hot patching materials, the hot patching materials at the upper expansion joint are difficult to form a tight structure with the silica brick, and the lower expansion joint is a hollow structure, so that burning loss is easily caused; if the heat-insulating layer is covered above the upper expansion joint, the temperature of the area can be increased to further accelerate burning, the existing treatment structure is reserved at the expansion joint of the main arch joint without heat insulation, namely, the heat-insulating layer is additionally covered on the expansion joint of the main arch joint, and the heat-insulating effect of the arch top of the melting furnace is greatly reduced by referring to fig. 5.

At 1 department increase zero expansion silica brick, first filling layer 4 and the second filling layer 6 of last expansion joint, zero expansion silica brick (zero expansion silica brick can be on market directly purchase) has low inflation, resistant characteristics of bursting apart, amorphous filler has the characteristic of non-expansion and low shrink, all can not appear the secondary shrinkage, can not cause the gap, can avoid burning out fast, for keeping warm and providing the condition, consequently, can be in last expansion joint top (be in on zero expansion silica brick and the second filling layer 6) add the lid heat preservation, add the lid heat preservation in last expansion joint top after adding the heat preservation, can promote the melting furnace heat preservation effect, reduce the energy consumption.

The thickness of the first filling layer 4 is set to be 10-15cm, and mainly plays a role of leveling, so that the upper surface of the uppermost zero-expansion brick on the upper part of the first filling layer 4 can be flush with the upper surface of the crown brick.

If the big arch brick is of an L-shaped structure, the inner side wall of the upper expansion joint 1 is of an L-shaped structure; if the big arch brick is of a T-shaped or ladder-shaped structure, the inner side wall of the upper expansion joint 1 is of an inclined structure, the inner side wall of the upper expansion joint 1 comprises a first side wall and a second side wall, the second side wall is horizontally arranged, the first side wall is arranged above the second side wall, an included angle is formed between the first side wall and the second side wall, and the included angle is larger than 90 degrees and smaller than 180 degrees.

The utility model provides a melting furnace arch crown expansion joint processing structure is not restricted to the L type brick structure commonly used in the picture, is applicable to T type, trapezoidal or other special-shaped brick structures equally. The utility model provides a melting furnace arch crown expansion joint processing structure mainly aims at the arch crown expansion joint, also includes the expansion joint processing between arch crown and preceding, back gable.

The utility model provides a melting furnace arch crown expansion joint processing structure specifically forms the step as follows:

s1, firstly, baking the kiln, and filling the repair material between the standard bricks and the lower expansion joint for welding to form a repair layer 3 after the expansion of the kiln body is stable (the temperature of the stable arch top reaches about 1000 ℃, such as 1000-. Welding gun is used for welding repair, during welding repair, welding is carried out at the temperature of 1000-1200 ℃, the distance between the welding gun and the surface of the brick body is 35-50mm, and the oxygen flow is 0.25-0.5m³And h, the ceramic repair welding equipment is matched with oxygen to fill the repair material in the lower expansion joint, so that the repair material and the inner side wall (the arch brick belongs to refractory materials) of the lower expansion joint at the position of the melting furnace to be repaired are molten to the optimal state during repair welding, namely, the repair material can be well combined with the arch brick, the welding is firm, no gap or space is generated, and the welding materials cannot be separated.

S2, after part or all of the welding materials are solidified in the lower expansion joint in the step S1, laying amorphous filler in the upper expansion joint (above the lower expansion joint) to form a first filling layer 4, covering the standard brick and the bottom of the upper expansion joint with the amorphous filler, after the amorphous filler is partially or completely solidified, placing at least one zero-expansion silica brick 5 on the first filling layer 4, then pouring the amorphous filler in a space between the zero-expansion silica brick and the inner side of the upper expansion joint to form a second filling layer 6, and after pouring, keeping the upper surfaces of the zero-expansion silica brick and the second filling layer flush with the upper surface of the arch brick;

and S3, arranging an insulating layer on the main arch brick, wherein the insulating layer can cover the zero-expansion silica brick and the amorphous filler. The heat-insulating layer comprises a sealing layer 91 arranged on the zero-expansion silica brick and the amorphous filler, a heat-insulating brick 92 arranged on the sealing layer 91 and a heat-insulating coating layer 93 arranged on the heat-insulating brick 92, wherein the sealing layer 91 is a siliceous sealing material, such as silicate. After the heat-insulating layer is laid on the upper layer, the integral sealing of the arch top of the kiln body is realized, compared with the traditional mode, the heat-insulating effect of the melting kiln can be greatly improved, the energy consumption is reduced, meanwhile, the probability of burning damage of the expansion joint of the arch top is reduced, and the generation of defects is reduced; can obviously save the cost for the operation of the melting furnace.

The utility model provides a melting furnace arch crown expansion joint processing structure, seal the expansion joint between the melting furnace arch crown joint and the festival, zero inflation silica brick has the characteristic of resistant bursting crack low expansion, first filling layer and second filling layer have the characteristic of non-expansion and low shrinkage, can not appear secondary shrinkage in the use, can not cause the gap risk; the problem that the expansion joint of the arch top of the melting furnace is easy to ablate is fundamentally solved, the service life of the melting furnace can be effectively prolonged, and the yield and the quality of glass are improved. After the main crown joint is processed by the structure, a heat-insulating layer can be laid on the upper layer of the main crown brick, so that the integral sealing and integral full-coverage heat insulation of the crown top of the kiln body are realized, and compared with the traditional mode, the heat-insulating effect of the melting furnace can be greatly improved, the heat loss is reduced, and the energy consumption of the melting furnace is reduced. Meanwhile, the probability of burning loss of the expansion joint of the arch top is reduced, the service life of the melting furnace is prolonged, and the defects caused by burning loss at the expansion joint are reduced; can obviously save the cost for the operation of the melting furnace.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A melting furnace arch top expansion joint processing structure is characterized in that an upper expansion joint (1) and a lower expansion joint (2) which are arranged oppositely up and down are arranged on a large arch brick (7), a standard brick (8) is arranged between the upper expansion joint (1) and the lower expansion joint (2), so that the upper expansion joint (1) and the lower expansion joint (2) are not communicated, the processing structure comprises a welding repair layer (3) arranged in the lower expansion joint (2), a first filling layer (4) arranged on the standard brick (8) and at least one zero expansion silica brick (5) arranged on the first filling layer (4), a second filling layer (6) is arranged between the zero expansion silica brick (5) and the inner side wall of the upper expansion joint (1), and the upper surface of the zero expansion silica brick (5) and the upper surface of the second filling layer (6) are flush with the upper surface of the large arch brick (7); the welding repair layer (3) is formed by heating and curing welding repair materials, and the first filling layer (4) and the second filling layer (6) are formed by curing amorphous fillers.

2. The melting furnace arch top expansion joint processing structure as claimed in claim 1, wherein the thickness of the first filling layer (4) is set to be 10-15 cm.

3. The melting furnace arch top expansion joint processing structure as claimed in claim 1, further comprising an insulating layer (9) disposed on the main arch brick (7), wherein the insulating layer (9) comprises a sealing layer (91) disposed on the zero expansion silica brick (5) and the second filler layer (6), an insulating brick (92) disposed on the sealing layer (91), and an insulating coating layer (93) disposed on the insulating brick (92).

4. The melting furnace arch top expansion joint processing structure as claimed in claim 1, wherein the inner side wall of the upper expansion joint (1) is of an L-shaped structure or an inclined structure.

5. The expanding seam processing structure for the arch top of the melting furnace as claimed in claim 1, wherein the zero expansion silica brick (5) is of a cubic structure.

6. The melting furnace arch top expansion joint processing structure of claim 3, wherein the sealing layer (91) comprises a silicon sealant.