CN113503738B

CN113503738B - Shaft kiln wall patching device in soda production

Info

Publication number: CN113503738B
Application number: CN202110769639.6A
Authority: CN
Inventors: 颜彬; 王伟; 成军; 刘照坤; 侯利; 纪彩林; 李俊强
Original assignee: Jiangsu Salt Industry Research Institute Co ltd; Jiangsu Suyan Jingshen Co ltd
Current assignee: Jiangsu Salt Industry Research Institute Co ltd; Jiangsu Suyan Jingshen Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2023-03-24
Anticipated expiration: 2041-07-07
Also published as: CN113503738A

Abstract

The invention discloses a shaft kiln wall repairing device in soda production, which is fixed at a lime kiln shell damage opening through welding and comprises a frame, wherein the frame is provided with two side surfaces, a front surface and a bottom surface, the two side surfaces are respectively provided with a row of holes for a heat exhaust pipe to pass through, the holes of the two side surfaces are corresponding to each other, the length of the heat exhaust pipe is greater than the distance between the holes of the two side surfaces, the heat exhaust pipe is sequentially sleeved with a spring and a sleeve after passing through the holes of the two side surfaces, the sleeve is fixed on the heat exhaust pipe in a mode that the spring is extruded to a certain degree, the outer edge of the bottom surface which is welded with the lime kiln shell is provided with a shape matched with the external outline of the lime kiln shell, and refractory heat-insulating materials are filled in the frame and between the heat exhaust pipes. The kiln wall patching device disclosed by the invention can be used for plugging the damaged part of the kiln wall of the lime kiln, avoiding the further deterioration of the kiln wall and solving the problem of environmental pollution caused by the damage of the kiln wall of the lime kiln.

Description

Shaft kiln wall patching device in soda production

Technical Field

The invention relates to a shaft kiln wall repairing device in soda ash production.

Background

The lime kiln is the core equipment for producing alkali by ammonia-soda process, and is characterized by decomposing limestone into CaO and CO under the condition of high temperature ₂ The kiln of (1) is mainly a shaft kiln (as shown in figure 1) in the prior production, a calcining area is divided into three upper, middle and lower areas of a preheating zone, a high-temperature zone and a cooling zone, and the structure of the side wall of the kiln is composed of refractory bricks and steel plates. With the development of the soda industry and the change of limestone, the problems commonly existing in the current lime kiln are as follows: easy to burn, almost every kiln will burn, and the burning will bring a series of troubles, so as to achieve the purpose ofThe production capacity of the kiln is not reached, the product quality is unstable, the kiln wall is seriously burnt even, the refractory brick falls off, and the steel plate on the kiln wall is burnt through.

The damaged part of the lime kiln is usually a high-temperature zone in a calcining area, the temperature reaches hundreds of ℃, and personnel cannot enter the kiln to overhaul. And after the kiln wall is burnt through, the dust in the kiln is sprayed outwards, so that the environmental sanitation is polluted, and meanwhile, sporadic burning coal falls down, so that the serious potential safety hazard exists. After the non-planned shutdown maintenance of the lime kiln, materials such as refractory materials and the like are ordered urgently, about 2-3 months are needed before and after the maintenance, and the non-planned shutdown and 3-month decrement inevitably bring serious loss in the production of the soda industry.

The height of the lime kiln is generally 28-32 m, the inner diameter is generally 6-7 m, the wall thickness of a steel plate of a shell of the lime kiln is generally 12mm, and the lining of the lime kiln is generally 0.85 m. However, the mechanized shaft kiln is eroded by high temperature for a long time, the materials are washed away, and impurities in lime and dolomite are subjected to chemical reaction, particularly for a calcining area of the lime kiln, the generated high temperature reaches 700-800 ℃, so that a refractory working layer is peeled off, refractory bricks are peeled off, and peeled refractory brick gaps are generated.

Disclosure of Invention

The invention provides a shaft kiln wall repairing device in soda production, which is used for repairing nails on the outer surface of a lime kiln to plug a damaged opening of a shell, and improving the current situations of serious economic loss and environmental pollution caused by unplanned kiln halt after the kiln wall of the lime kiln is damaged. Under the condition that the safe production of equipment is not influenced, the kiln wall patching device provided by the invention blocks the damaged part of the kiln wall of the lime kiln, avoids further deterioration of the kiln wall and solves the problem of environmental pollution caused by damage of the kiln wall of the lime kiln.

The invention relates to a shaft kiln wall repairing device in soda production, which is fixed at a lime kiln shell damage opening by welding and comprises a frame, wherein the frame is provided with two side surfaces, a front surface and a bottom surface, the two side surfaces are respectively provided with a row of holes for a heat exhaust pipe to pass through, the holes of the two side surfaces are corresponding to each other, the length of the heat exhaust pipe is larger than the distance between the holes of the two side surfaces, the heat exhaust pipe is sequentially sleeved with a spring and a sleeve after passing through the holes of the two side surfaces, the sleeve is fixed on the heat exhaust pipe in a mode that the spring is extruded to a certain degree, the outer edges of the side surfaces and the bottom surface are used for welding to the outer wall of the lime kiln shell, the outer edge of the bottom surface which is welded and connected with the lime kiln shell is provided with a shape matched with the outer contour (the outer contour of the cross section) of the lime kiln shell, for example, the shape is arc (the arc with the radian being matched with the length being the same as the outer contour of the lime kiln), and the inner cavity formed between the frame and the heat exhaust pipe (the inner cavity formed between the frame and the outer wall of the lime kiln shell after the frame are welded to the outer wall of the lime kiln shell and the lime kiln shell is fixed.

Further, be equipped with the fixed orifices that supplies the bolt to pass on the sleeve pipe, the bolt passes the fixed orifices and supports the heat extraction pipe to fix the sleeve pipe on the heat extraction pipe, perhaps, also can be through setting up outer silk (external screw thread) at the both ends of heat extraction pipe, set up the internal thread and be fixed in the sleeve pipe on the heat extraction pipe at sheathed tube inner wall.

Further, the top and back of the frame are open.

Further, the frame has a height of 1.5-3m, preferably 1.8-2.5m, more preferably about 2m, a width (distance between two side faces) of 1.0-2.5m, preferably 1.2-2.0m, more preferably about 1.5m, and a thickness (lateral dimension of the side faces in the mounted state) of 0.15-0.3m, preferably 0.18-0.25m, more preferably about 0.2m.

Furthermore, two side surfaces (which can be rectangular for example) of the frame are parallel to each other and are vertically connected with the front surface of the frame, the bottom of each side surface is vertically connected with the bottom surface, and the edge (outer edge) of each side surface far away from the front surface is axially welded and fixed on the lime kiln shell.

Further, the bottom surface of the frame is perpendicularly connected with the front surface of the frame, the arc-shaped edge of the bottom surface far away from the front surface of the frame has an arc consistent with the arc of the lime kiln shell connected with the bottom surface, and the shortest distance between the arc-shaped edge and the front surface is larger than the distance between the outermost side of the heat discharge pipe and the front surface, for example, about 1.0-8.0cm, for example, preferably 2.0-7.5cm, and most preferably 5-6cm.

Further, the frame is made of carbon steel material (steel plate) with the thickness of 7-20mm, preferably 8-15mm, preferably about 10 mm; preferably integrally formed. Further, each sleeve is fixed on the heat exhaust pipe, so that the distance between the sleeve and the side surface is smaller than the natural length of the spring, for example, about 1.5-4cm smaller than the natural length of the spring, preferably about 2-3cm smaller than the natural length of the spring, the spring is a common spring, the diameter of the spring is slightly larger than the outer diameter of the heat exhaust pipe, for example, 2-5mm larger than the outer diameter of the heat exhaust pipe, for example, 3mm, and the spring can be sleeved in the heat exhaust pipe and is larger than or equal to the inner diameter of the sleeve.

Further, the left and right ends of the heat-discharging pipe extend out of the frame by 10-30cm, preferably 15-25cm, and more preferably about 20cm.

Further, as the refractory heat insulating material, any one of refractory mortar and sepiolite (having a particle size of, for example, 10 to 1500 mesh, preferably 300 to 1300 mesh) which are generally used in the art can be used, and as the refractory mortar, clay, high alumina, silica, magnesium, etc. can be used, and commercially available refractory mortar can be used.

Furthermore, the heat discharge pipe is made of carbon steel material, the outer diameter is 40-80mm, preferably 50-70mm, more preferably 57mm, and the wall thickness is 2-5mm, preferably 2.5-4mm, more preferably 3.5mm; the distance between the heat discharge pipes is 6-15cm, preferably 8-12cm, more preferably about 10cm, the distance between the lowermost heat discharge pipe and the bottom surface of the frame is 6-15cm, preferably 8-12cm, more preferably 10cm, and the distance between the uppermost heat discharge pipe and the top of the frame is 12-30cm, preferably 16-24cm, more preferably 20cm. The number of heat pipes is typically 3-30, further 5-25, still further 10-20, e.g. 15, 18. The heat extraction pipe is preferably closed at both ends.

Further, the sleeve is made of carbon steel, the inner diameter of the sleeve is generally 43-83mm, preferably 53-73mm, more preferably about 60mm, and is slightly larger than the outer diameter of the heat exhaust pipe, the thickness (difference between the outer diameter and the inner diameter of the sleeve) of the sleeve is 3-7cm, preferably 4-6cm, more preferably 5cm, the length of the sleeve is 3-5cm, preferably 3.5-4.5cm, for example 4cm, the inner part of the fixing hole on the sleeve is sleeved with a thread matching with the bolt, the bolt is a bolt commonly used in the art, and the material can be stainless steel.

In the invention, the height of the lime kiln is generally 28-32 m, the inner diameter is generally 6-7 m, the wall thickness of a steel plate of a shell of the lime kiln is generally 12mm, and a lining of the lime kiln is generally 0.85 m.

The invention relates to a using method of a shaft kiln wall repairing device in soda ash production, which comprises the following steps:

(1) Before the installation, the air supply of the lime kiln is stopped, the ash discharge of the lime kiln is stopped, the burning coke accumulated at the refractory brick notch and the shell damage port of the lime kiln is ensured to be in a static state, the burning coke usually burns for 5 hours to achieve complete combustion, the lime kiln is stopped, the lime kiln is kept in a non-ash discharge state, and after 36 hours, the temperature of the shell damage port of the lime kiln reaches the normal ambient temperature from 300 ℃, so that the installation of the repairing device is ensured.

(2) During the installation, at first place the frame on the damaged mouth of lime kiln casing, the approximate central point that the damaged mouth of preferred lime kiln casing corresponds the frame puts, the damaged mouth of lime kiln casing covers at the frame back, with long limit of side and bottom surface outer fringe (arc limit) welding on the lime kiln casing, the heat extraction pipe is inside through the hole insertion frame on the side, both ends are stretched out certain length respectively (for example can be 20 cm) about, install spring and sleeve pipe in proper order at the both ends of heat extraction pipe respectively, the sleeve pipe passes the fixed orifices through the bolt and supports the heat extraction pipe and fix the both ends at the heat extraction pipe, the installation spring is difficult too compressed tightly, the purpose of spring prevents that the heat extraction pipe from leading to lax or warping because of expend with heat and contract with cold, at last, adopt fire-resistant insulation material to fill in the inner chamber that frame and kiln wall formed.

(3) During operation, the refractory bricks at the damaged positions can generate new burning coke along with the operation of the lime kiln, the temperature at the positions is caused to reach 300 ℃, the refractory heat-insulating material in the repairing device plays a good role in protecting the temperature of the refractory bricks, the overhigh temperature of the shell of the lime kiln is avoided, and the formation of limescale due to the sharp drop of the temperature of the mixed materials (limestone and coke) during the calcination of the lime kiln is also avoided. However, after the temperature of the fireproof heat-insulating material rises, in order to prevent the deformation of the internal structure of the repairing device, heat in the fireproof heat-insulating material is removed through the heat-removing pipe, and the damage caused by the thermal expansion of the device is avoided. Meanwhile, when the temperature of the heat exhaust pipe rises, the spring can be stretched; however, after the lime kiln is stopped, the temperature of the heat exhaust pipe is reduced, and the heat exhaust pipe is compressed by the spring after the heat exhaust pipe is contracted due to the temperature reduction, so that the structure of the repairing device is compact and fixed through the spring.

The invention has the advantages of

(1) The invention provides a shaft kiln wall repairing device in soda production, which aims at the current situations that serious economic loss and environmental pollution are brought to enterprises due to unplanned kiln halt after the kiln wall of a lime kiln is damaged. Not only avoids the great danger caused by the falling of the mixture of the limestone and the coke which are burning from the damaged opening of the shell, but also solves the problems that the carbon dioxide gas is overflowed due to the damage of the kiln wall of the lime kiln and a great amount of dust is overflowed to pollute the environmental sanitation.

(2) The invention adopts the refractory heat-insulating material in the repairing device, thereby not only avoiding the generation of clinker caused by the rapid temperature drop of the mixed materials (limestone and coke) during the calcination of the lime kiln, but also playing a role in ensuring the safety of the shell of the lime kiln and simultaneously reducing the waste of coke energy.

(3) The arrangement of the heat-discharging pipe devices is adopted in the repairing device, and the heat-discharging pipes are used for discharging redundant heat in the repairing device, so that the device is prevented from deforming due to thermal expansion.

(4) The spring device is arranged on the heat discharging pipe, so that the problem that the heat discharging pipe is loosened due to expansion caused by heat and contraction caused by the change of the work of the lime kiln is solved.

Drawings

FIG. 1 is an assembly view of the apparatus for repairing the wall of a lime kiln shaft kiln of the present invention.

FIG. 2 is a front view of the lime kiln shaft kiln wall repair apparatus of the present invention.

FIG. 3 is a rear view of the apparatus for repairing the wall of a lime kiln shaft of the present invention.

Fig. 4 is a diagram of the connection structure of the sleeve and the heat discharging pipe.

Fig. 5 is a schematic structural view of the frame.

Fig. 6 is a front view of the sleeve.

Fig. 7 is a left side full section view of the cannula.

Reference numerals:

1 lime kiln; 2 lime kiln shell; 3, refractory bricks; 4, mixing limestone and coke; 5, a lime kiln shell breakage opening; 6, refractory heat-insulating material; 7, a shaft kiln wall repairing device; 8, gaps of refractory bricks; 9 casing pipe; 10 bolts; 11 a front side; 12 rows of heat pipes; 13 a spring; 14 a frame; 15 side faces; 16 a bottom surface; 17 arc-shaped edges; 18 securing the aperture.

Detailed Description

Preferred embodiments of the present invention will be further described with reference to the accompanying drawings.

In the present application, the "side, front, bottom, top and back" are the placement positions in fig. 3 as the reference.

As shown in fig. 1-7, the shaft kiln wall repair device 7 in soda production according to the present invention is fixed to a lime kiln shell breakage port 5 of a lime kiln 1 by welding, and comprises a frame 14, the frame 14 has two side surfaces 15, a front surface 11 and a bottom surface 16, the two side surfaces 15 each have a row of holes for passing a heat discharging pipe 12, and the holes of the two side surfaces 15 correspond to each other, the length of the heat discharging pipe 12 is greater than the distance between the holes between the two side surfaces 15, the heat discharging pipe 12 is sequentially sleeved with a spring 13 and a sleeve 9 after passing through the holes of the two side surfaces, the sleeve 9 is provided with a fixing hole 18 for passing a bolt, the bolt 10 passes through the fixing hole 18 and abuts against the heat discharging pipe 12, thereby fixing the sleeve 9 on the heat discharging pipe 12, the outer edge of the side surface 15 and the outer edge of the bottom surface 16 are used for welding to the outer wall of the lime kiln shell, the welding connection edge of the bottom surface 16 and the lime kiln shell 2 is an arc-shaped edge 17, which is matched with the outer wall profile of the lime kiln shell, and the inner cavity 6 formed between the frame 14 and the heat discharging pipe 12 (after the frame is welded to the outer wall of the lime kiln shell) is filled with refractory material 6).

The top and back of the frame 14 are open.

The frame may have a height of, for example, 1.5-3m, preferably 1.8-2.5m, more preferably about 2m, a width (distance between two side faces) of 1.0-2.5m, preferably 1.2-2.0m, more preferably about 1.5m, and a thickness (lateral dimension of a side face in the mounted state) of 0.15-0.3m, preferably 0.18-0.25m, more preferably about 0.2m.

Two side surfaces 15 (usually rectangular) of the frame are parallel to each other and are perpendicularly connected with the front surface 11 of the frame, the bottom of the side surfaces are perpendicularly connected with the bottom surface 16, and the edges (outer edges) of the side surfaces far away from the front surface are axially welded and fixed on the shell of the lime kiln.

The bottom surface 16 of the frame 14 is perpendicularly connected to the front surface 11 of the frame, the curved edge 17 of the bottom surface is distant from the front surface 11 of the frame, the curvature of the curved edge 17 of the bottom surface corresponds to the curvature of the lime kiln shell to which it is connected, and the shortest distance between the curved edge 17 and the front surface 11 is greater than the distance between the outermost side of the heat extraction pipe 12 and the front surface 11, for example, about 1.0-8.0cm, for example, preferably 2.0-7.5cm, and most preferably 5-6cm.

The frame 14 is made of carbon steel material with a thickness of 7-20mm, preferably 8-15mm, preferably 10mm, preferably integrally formed.

Each sleeve is fixed on the heat exhaust pipe, so that the distance between the sleeve 9 and the side surface 15 is smaller than the natural length of the spring 13, for example, about 1.5-4cm smaller than the natural length of the spring, preferably about 2-3cm smaller than the natural length of the spring, the spring 13 is a common spring, and the diameter of the spring is slightly larger than the outer diameter of the heat exhaust pipe, for example, 2-5mm larger than the outer diameter of the heat exhaust pipe, for example, about 3mm, and the spring can be sleeved in the heat exhaust pipe 12 and is larger than or equal to the inner diameter of the sleeve 9.

The left and right ends of the heat-discharging pipe 12 extend 10-30cm, preferably 15-25cm, and more preferably about 20cm beyond the frame.

The refractory heat insulating material 6 is preferably made of either refractory mortar or sepiolite (the particle size may be, for example, 10 to 1500 mesh, preferably 300 to 1300 mesh).

The heat discharging pipe 12 may be made of carbon steel material, and has an outer diameter of 40 to 80mm, preferably 50 to 70mm, and more preferably about 57mm, and a wall thickness of 2 to 5mm, preferably 2.5 to 4mm, and more preferably about 3.5mm; the distance between the heat pipes 12 is 6-15cm, preferably 8-12cm, more preferably about 10cm, the distance between the lowermost heat pipe and the bottom surface 16 of the frame is 6-15cm, preferably 8-12cm, more preferably about 10cm, and the distance between the uppermost heat pipe and the top of the frame is 12-30cm, preferably 16-24cm, more preferably about 20cm. The number of heat extraction pipes is typically 3-30, further 5-25, still further 10-20, e.g. 15, 18, the number of heat extraction pipes corresponding to the number of holes per side of the frame.

The sleeve 9 may be made of carbon steel, the inner diameter of the sleeve 9 is generally 43-83mm, preferably 53-73mm, and more preferably about 60mm, slightly larger than the outer diameter of the heat discharging pipe 12, the thickness of the sleeve 9 is 3-7cm, preferably 4-6cm, and more preferably 5cm, the length of the sleeve 9 is 3-5cm, and preferably 4cm, the inner thread of the fixing hole 18 on the sleeve 9 matches with the thread of the bolt 10, the bolt is a bolt commonly used in the art, and the material may be stainless steel.

Example 1

(1) Before installation, air supply of the lime kiln 1 is stopped, ash discharge of the lime kiln is stopped, as shown in fig. 1, burning coke accumulated at a refractory brick notch 8 and a shell damage opening 5 of the lime kiln is guaranteed to be in a static state, the burning coke is burnt for 5 hours to achieve complete combustion, the lime kiln is stopped, materials of the lime kiln are kept in a non-ash discharge state, and after 36 hours, the temperature of the shell damage opening 5 of the lime kiln is generally kept to reach normal ambient temperature from 300 ℃, so that the installation of the vertical kiln wall repairing device is guaranteed.

(2) As shown in fig. 1-7, during installation, firstly, the frame 14 is placed on the lime kiln shell damage opening 5, the lime kiln shell damage opening 5 corresponds to the approximate central position of the frame 14, the back of the frame 14 covers the lime kiln shell damage opening 5, the long side (outer edge of the side) and the bottom arc-shaped edge 17 are welded on the lime kiln shell, the heat exhaust pipe 12 is inserted into the frame 14 through a hole on the side 15, the left end and the right end extend out by a certain length (20 cm) respectively, the spring 13 and the sleeve 9 are sequentially installed at the two ends of the heat exhaust pipe 12, the sleeve 9 passes through the bolt 10 and abuts against the heat exhaust pipe through the fixing hole 18 to be fixed at the two ends of the heat exhaust pipe, the spring 13 is not easy to be compressed too tightly when being installed, the purpose of the spring is to prevent the heat exhaust pipe from loosening or deforming caused by thermal expansion and contraction, and finally, the inner cavity formed by the frame 14 and the lime kiln shell 2 is filled with a refractory heat-insulating material (refractory mud). Wherein, the heat discharging pipe 12 is made of carbon steel material, the outer diameter is 57mm, and the wall thickness is 3.5mm; the distance between the heat pipes 12 is 10cm, the distance between the lowermost heat pipe and the bottom surface 16 of the frame is 10cm and the distance between the uppermost heat pipe and the top of the frame is 20cm. The number of heat discharging pipes is 11, and the number of heat discharging pipes is consistent with the number of holes on each side surface of the frame.

(3) When the repairing device works, the refractory bricks 3 at the damaged positions can generate new burning coke along with the work of the lime kiln, the temperature of the gaps is up to 300 ℃, the refractory heat-insulating material 6 in the repairing device can well protect the temperature of the gaps, the overhigh temperature of the shell of the lime kiln is avoided, and the formation of clinker caused by the rapid temperature drop of mixed materials (limestone and coke mixed materials 4) during the calcination of the lime kiln is also avoided. However, after the temperature of the refractory heat-insulating material 6 rises, in order to prevent the deformation of the internal structure of the repairing device, the heat in the refractory heat-insulating material is removed through the heat-removing pipe 12, so that the device is prevented from being damaged due to thermal expansion. Meanwhile, when the temperature of the heat exhaust pipe 12 rises, the spring 13 is stretched; however, the temperature of the position of the lime kiln is reduced after the lime kiln is stopped, the heat discharging pipe 12 is reduced along with the temperature, the heat discharging pipe 12 is contracted along with the temperature reduction, and then the spring 13 is compressed, so that the compact structure and the fixation of the repairing device are ensured through the spring 13.

Example 2

Similar to example 1, except that sepiolite was used as the refractory insulation.

Example 3

Similar to example 1, except that the heat discharge pipe 12 has an outer diameter of 60mm and a wall thickness of 4.0mm; the distance between the heat pipes 12 is 12cm, the distance between the lowermost heat pipe and the bottom surface 16 of the frame is 12cm, and the distance between the uppermost heat pipe and the top of the frame is 18cm. The number of heat discharging pipes is 15, and the number of heat discharging pipes is consistent with the number of holes on each side surface of the frame.

While specific embodiments of the present invention have been described in detail, it should be understood that the foregoing description is for purposes of illustration only and is not intended to limit the scope of the invention in any way. Numerous changes and substitutions may be made by those skilled in the art without departing from the spirit and scope of the invention, and all such changes and substitutions are to be considered within the scope of the appended claims.

Claims

1. The utility model provides a shaft kiln wall patching device in soda production, it is fixed in lime kiln casing damaged mouth through welded fastening, it includes a frame, the frame has two sides, a front and a bottom surface, two sides have a row of hole that supplies the heat extraction pipe to pass respectively, and the hole of two sides is corresponding each other, the length of heat extraction pipe is greater than the interval of the hole between two sides, cover spring and sleeve pipe in proper order after the heat extraction pipe passes the hole of two sides, the sleeve pipe is fixed in on the heat extraction pipe in a mode that makes the spring receive certain degree extrusion, the outer fringe of side and the outer fringe of bottom surface are used for welding on the lime kiln casing outer wall, the outer fringe of bottom surface with lime kiln casing welded fastening has the shape with lime kiln casing outside profile phase-match, it has fire-resistant insulation material to fill between the frame and the heat extraction pipe.

2. The apparatus for repairing a wall of a shaft kiln in soda production according to claim 1, wherein a top and a back of said frame are open; and/or

The sleeve is provided with a fixing hole for the bolt to pass through, and the bolt passes through the fixing hole to abut against the heat exhaust pipe, so that the sleeve is fixed on the heat exhaust pipe.

3. The apparatus for repairing a wall of a shaft kiln used in soda production as claimed in claim 1, wherein the frame has a height of 1.5 to 3m, a width of 1.0 to 2.5m and a thickness of 0.15 to 0.3m.

4. The apparatus for repairing a wall of a shaft kiln in soda production as claimed in claim 3, wherein the frame has a height of 1.8 to 2.5m, a width of 1.2 to 2.0m and a thickness of 0.18 to 0.25m.

5. The shaft kiln wall repairing device in the soda production as claimed in any one of claims 1 to 4, wherein two side surfaces of the frame are parallel to each other and are vertically connected with a front surface of the frame, the bottom of the side surface is vertically connected with a bottom surface, and the edge of the side surface far away from the front surface is axially welded and fixed on the lime kiln shell; and/or

The bottom surface of the frame is vertically connected with the front surface of the frame, the radian of the arc edge of the bottom surface far away from the front surface of the frame is consistent with that of a lime kiln shell connected with the arc edge, and the shortest distance between the arc edge and the front surface is greater than the distance between the outermost side and the front surface of the heat discharge pipe.

6. The apparatus for repairing a wall of a shaft kiln used in soda production according to any one of claims 1 to 4, wherein the frame is made of a carbon steel plate having a thickness of 8 to 15 mm.

7. The apparatus for repairing a wall of a shaft kiln used in soda production as claimed in claim 1, wherein a distance between the sleeve and the side surface is smaller than a natural length of the spring, and a diameter of the spring is slightly larger than an outer diameter of the heat discharging pipe.

8. The shaft kiln wall repairing device in the soda production as claimed in claim 1, wherein the left and right ends of the heat discharging pipe extend 10-30cm beyond the frame.

9. The apparatus for repairing the wall of a shaft kiln in the production of soda ash as claimed in claim 1, wherein the refractory heat insulating material is any one or a mixture of refractory clay and sepiolite.

10. The shaft kiln wall repairing device in the soda production as claimed in claim 1 or 8, wherein the heat discharging pipe is made of carbon steel material, the outer diameter is 40-80mm, and the wall thickness is 2-5mm; the distance between the heat discharge pipes is 6-15cm, the distance between the lowest heat discharge pipe and the bottom surface of the frame is 6-15cm, and the distance between the highest heat discharge pipe and the top of the frame is 12-30cm.

11. The shaft kiln wall repairing device in the soda production as claimed in claim 10, wherein the heat discharging pipe is made of carbon steel material, the outer diameter is 50-70mm, and the wall thickness is 2.5-4mm; the distance between the heat discharge pipes is 8-12cm, the distance between the lowest heat discharge pipe and the bottom surface of the frame is 8-12cm, and the distance between the highest heat discharge pipe and the top of the frame is 16-24cm.

12. The shaft kiln wall repairing device in the soda production as claimed in claim 1 or 7, wherein the sleeve is made of carbon steel, the inner diameter of the sleeve is 43-83mm, which is slightly larger than the outer diameter of the heat exhaust pipe, the thickness of the sleeve is 3-7cm, the length of the sleeve is 3-5cm, and the fixing hole on the sleeve is internally threaded and matched with the screw thread of the bolt.

13. The shaft kiln wall repairing device in soda production as claimed in claim 12, wherein an inner diameter of the sleeve is 53-73mm slightly larger than an outer diameter of the heat exhausting pipe, a thickness of the sleeve is 4-6cm, and a length of the sleeve is 3.5-4.5cm.