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CN112010652A - Maintenance method for stopping furnace of petroleum coke calcining furnace fire path - Google Patents

Maintenance method for stopping furnace of petroleum coke calcining furnace fire path Download PDF

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Publication number
CN112010652A
CN112010652A CN202010867991.9A CN202010867991A CN112010652A CN 112010652 A CN112010652 A CN 112010652A CN 202010867991 A CN202010867991 A CN 202010867991A CN 112010652 A CN112010652 A CN 112010652A
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Prior art keywords
fire
silicon carbide
furnace
hook
path
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CN202010867991.9A
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马汝杰
张永利
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Shandong Zhongyang Carbon Stock Co ltd
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Shandong Zhongyang Carbon Stock Co ltd
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Priority to CN202010867991.9A priority Critical patent/CN112010652A/en
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    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
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Abstract

A maintenance method for a fire path of a petroleum coke calcining furnace without shutdown comprises the following steps: the method comprises the following steps: disassembling a fire observation port of a flame path to be maintained; step two: taking a fire baffle plate (1) with the area larger than that of a fire observation opening, arranging a rail groove (5) at the lower part of the fire baffle plate, placing a hook (3) in the rail groove (5), fixing a hook plate (4) at the tail end of the hook (3), extending the hook (3) to a material leakage point of a calcining furnace, and scraping out the leaked material; step three: filling the silicon carbide precast block into the flame path to be maintained from the flame viewing port disassembled in the step one; step four: adjusting the position of the silicon carbide precast block, and blocking a material leakage point of the calcining furnace; step five: and building a fire observation port of the flame path to be maintained again. When the method needs maintenance, the silicon carbide prefabricated part is directly pushed into a specified position, so that the method is convenient and rapid, the furnace does not need to be shut down, and the normal production is not delayed.

Description

Maintenance method for stopping furnace of petroleum coke calcining furnace fire path
Technical Field
The invention relates to the technical field of petroleum coke calciners, in particular to a maintenance method for a flame path of a petroleum coke calciner without shutdown.
Background
A calcining furnace is a thermal equipment for heat treatment of carbon raw materials (such as coke, anthracite and the like) at high temperature to improve the performance of the raw materials. The calcining furnace is adopted to manufacture petroleum coke in our company, specifically, a pot-type calcining furnace is adopted, one pot-type furnace is composed of a plurality of calcining tanks with the same size, the calcining tanks are arranged in front and back rows, every 4 tanks are a group (two tanks in front and back rows), according to the requirement of yield, one pot-type furnace is generally built by 4-7 groups of calcining tanks together, the left side and the right side of each calcining tank are provided with 6-8 layers of heating flame paths in the horizontal direction, flames are not in direct contact with raw materials, and all the calcining tanks and the flame paths are built by silica bricks and high-alumina bricks. The volatile components discharged from the raw materials are collected in the main flue at the upper part of the furnace and are introduced into the required flame path through the volatile component pulling plate for combustion, and under the normal condition, no additional fuel is needed, and the self requirement of the calcining furnace can be met only by utilizing the heat of the volatile component combustion. However, if the operation is carried out illegally, the volatile matter can not be fully combusted in the flame path, but can be combusted in the waste gas path, or the combustion in a certain flame path is too high. If the flame temperature exceeds the refractoriness under load of the refractory bricks, there is a possibility that the layer of the flame path refractory bricks will be burned out. The raw materials in the calcining furnace leak into the flame path, if the leaked materials are continuously increased, the flame path on the layer can be blocked, the temperature of each layer of the whole pot furnace can not reach the standard, and the furnace shutdown maintenance is required.
The traditional flame path maintenance method comprises the steps of dismantling the furnace for maintenance, namely stopping the furnace for a certain time, waiting for the temperature in the furnace to drop, then removing refractory bricks between the flame path and the calcining tank from the top of the calcining tank to a specified layer, then clearing leaked materials, and then building the refractory bricks again. However, the maintenance method is time-consuming, labor-consuming and too high in maintenance cost, and the normal production scheduling plan of a factory is seriously influenced. In addition, a method for repairing a roasting furnace is disclosed in the prior art, and the patent number is CN109855430B, which is an improvement on the traditional method for repairing the roasting furnace, but the surface of the original roasting furnace is still treated and reinforced, which only has a preventive effect, and the furnace still needs to be stopped for maintenance when the material leakage phenomenon occurs.
Disclosure of Invention
In order to solve the problems of time consumption, labor consumption and high maintenance cost caused by shutdown maintenance during the maintenance of the calcining furnace flame path, the invention provides the shutdown maintenance method for the petroleum coke calcining furnace flame path.
The technical scheme of the invention is as follows:
a maintenance method for a fire path of a petroleum coke calcining furnace without shutdown comprises the following steps:
the method comprises the following steps: disassembling a fire observation port of a flame path to be maintained;
step two: filling the silicon carbide precast block into the flame path to be maintained from the flame viewing port disassembled in the step one;
step three: adjusting the position of the silicon carbide precast block, and blocking a material leakage point of the calcining furnace;
step four: and building a fire observation port of the flame path to be maintained again.
A maintenance method for a fire path of a petroleum coke calcining furnace without shutdown comprises the following steps:
the method comprises the following steps: disassembling a fire observation port of a flame path to be maintained;
step two: taking a fire baffle plate with the area larger than that of a fire observation opening, arranging a rail groove at the lower part of the fire baffle plate, placing a hook in the rail groove, fixing a hook plate at the tail end of the hook, extending the hook into a material leakage point of a calcining furnace, and scraping out the leaked material;
step three: filling the silicon carbide precast block into the flame path to be maintained from the flame viewing port disassembled in the step one;
step four: adjusting the position of the silicon carbide precast block, and blocking a material leakage point of the calcining furnace;
step five: and building a fire observation port of the flame path to be maintained again.
According to the maintenance method for the flame path of the petroleum coke calcining furnace without stopping the furnace, the silicon carbide precast block is a hollow rectangular block, and is conveniently plugged into the flame path, so that flame passes through the center of the silicon carbide precast block. The material leakage point of a general calcining furnace is arranged at the center of a flame path, and the height of the silicon carbide precast block is required to be larger than 1/2 of the height of the flame path to be maintained, so that the silicon carbide precast block can completely block the material leakage point. And the wall thickness of the silicon carbide precast block is not less than 15mm, so that the silicon carbide precast block has enough strength.
Further, the length of the silicon carbide precast block is more than 0.8 m.
According to the maintenance method for the fire path of the petroleum coke calcining furnace without shutdown, the silicon carbide precast block comprises the following raw materials: 30-50 parts of silicon carbide granularity sand, 30-50 parts of silicon dioxide, 1-5 parts of kaolin, 6-10 parts of metal silicon powder, 3-10 parts of kyanite and 4-10 parts of chemical binder. The chemical adhesive comprises at least one of polyvinyl alcohol, sodium silicate, sodium tripolyphosphate, carboxymethyl cellulose and silica sol.
Further, the preparation method of the silicon carbide precast block comprises the following steps: selecting raw materials according to the requirement of granularity, proportioning and mixing according to a proportion, mixing by a mixing roll, injection molding, drying, degreasing and sintering, wherein the maximum temperature after sintering is controlled to be 1400-1500 ℃ and is higher than the maximum temperature 1300 ℃ in a flame path.
According to the maintenance method for the flame path of the petroleum coke calcining furnace without stopping the furnace, the fire blocking plate is made of refractory materials, the fire observation window is embedded in the upper part of the fire blocking plate and used for observing the motion conditions of the hook and the hook plate, the track groove is arranged in the lower part of the fire blocking plate, and one end of the track groove is opened and used for the hook to penetrate through.
Further, the track groove includes horizontal track groove and vertical track groove, vertical track groove upper end is located the fender fire board central point and puts, and the lower extreme is perpendicular with horizontal track groove, horizontal track groove one end opening, the hook gets into the back from horizontal track groove open end, both can be at horizontal track inslot translation, also can get into vertical track groove and remove to avoid some bold leaks the material in the flame path.
Furthermore, the diameter of the hook is smaller than the width of the track groove, supporting blocks are arranged at the left side and the right side of the lower portion of the inner wall of the fire baffle plate, and the distance between the two supporting blocks which are farthest away is smaller than the width of a fire channel to be maintained. Because the fire baffle only uses temporarily when the flame path is maintained, so only set up the supporting shoe in the flame path can with the fire baffle card in the flame path in the fire baffle inner wall below. When in use, the left hand can be used for pressing the fire baffle in an auxiliary way, and the right hand can be used for pulling the hook.
Preferably, the transverse rail groove of the rail groove is opened at the right end, and the opening space at the left side is reduced, so that the use habit of the left hand and the right hand of most people is met.
The beneficial effect of the invention is that,
1. the invention discloses a maintenance method for a flame path of a petroleum coke calcining furnace without stopping the furnace, which is characterized in that a plurality of silicon carbide prefabricated parts matched with the flame path in size are prefabricated in advance, and when the maintenance is needed, the silicon carbide prefabricated parts are directly pushed into a specified position, so that the maintenance is convenient and rapid, the furnace does not need to be stopped, and the normal production is not delayed.
2. The invention discloses a maintenance method for a flame path of a petroleum coke calcining furnace without stopping the furnace, which is characterized in that a hook, a hook plate and a fire baffle plate are matched in advance to hook out leaked materials in the flame path, so that the effective use space in the flame path is increased. And the opening position of the flame path is blocked by the fire baffle plate, so that the condition that an operator is always baked by high temperature in the flame path when using the hook can be avoided, and the safety of the operator in maintaining the flame path is improved.
Drawings
The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
In the drawings:
FIG. 1 is a schematic structural view of a silicon carbide preform, wherein (a) is a top view and (b) is a front view;
FIG. 2 is a view showing the installation position of the fire damper of the present embodiment on a fire tunnel;
FIG. 3 is a view of the hook in use with a fire stop;
FIG. 4 is a view of the hook in use with a fire stop;
FIG. 5 is a schematic view of a fire stop plate;
the components represented by the reference numerals in the figures are:
1. the fire-blocking window comprises a fire-blocking plate 2, a fire observation window 3, a hook 4, a hook plate 5, a track groove 51, a transverse track groove 52, a vertical track groove 6 and a supporting block.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided so that this disclosure can be more completely understood and fully conveyed to those skilled in the art, and the present disclosure may be implemented in various forms without being limited to the embodiments set forth herein.
A maintenance method for a fire path of a petroleum coke calcining furnace without shutdown comprises the following steps:
the method comprises the following steps: disassembling a fire observation port of a flame path to be maintained;
step two: filling the silicon carbide precast block into the flame path to be maintained from the flame viewing port disassembled in the step one;
step three: adjusting the position of the silicon carbide precast block to ensure that the center of the silicon carbide precast block coincides with the center of the material leakage point, and blocking the material leakage point of the calcining furnace;
step four: and building a fire observation port of the flame path to be maintained again.
Preferably, before the second step is executed, whether the flame path is cleaned or not can be determined according to the amount of leaked materials in the flame path, if the leaked materials are less, the flame path does not need to be cleaned, and if the leaked materials are more, the leaked materials in the flame path need to be dug out before the second step. The specific maintenance method can be executed according to the following steps:
the method comprises the following steps: disassembling a fire observation port of a flame path to be maintained;
step two: taking a fire baffle plate 1 with the area larger than a fire observation opening, arranging a rail groove 5 at the lower part of the fire baffle plate, placing a hook 3 in the rail groove 5, fixing a hook plate 4 at the tail end of the hook 3, extending the hook 3 into a material leakage point of a calcining furnace, and scraping out the leaked material;
step three: filling the silicon carbide precast block into the flame path to be maintained from the flame viewing port disassembled in the step one;
step four: adjusting the position of the silicon carbide precast block, and blocking a material leakage point of the calcining furnace;
step five: and building a fire observation port of the flame path to be maintained again.
The silicon carbide precast block mentioned in the maintenance method is a hollow rectangular block, so that the silicon carbide precast block can be conveniently plugged into a flame path, flame can penetrate through the center of the silicon carbide precast block, and the rectangular frame can be conveniently attached to the side face of a fire wall, as shown in fig. 1. The material leakage point of a general calcining furnace is arranged at the center of a flame path, and the height of the silicon carbide precast block is required to be larger than 1/2 of the height of the flame path to be maintained, so that the silicon carbide precast block can completely block the material leakage point. And the wall thickness of the silicon carbide precast block is not less than 15mm, so that the silicon carbide precast block has enough strength.
Furthermore, the length of the silicon carbide precast block is larger than 0.8m, so that the silicon carbide precast block has enough weight and length, a leakage point can be tightly sealed, and the phenomenon of secondary leakage on the contact surface of the silicon carbide precast block and a fire wall is prevented.
Further, the silicon carbide precast block comprises the following raw materials: 30-50 parts of silicon carbide granularity sand, 30-50 parts of silicon dioxide, 1-5 parts of kaolin, 6-10 parts of metal silicon powder, 3-10 parts of kyanite and 4-10 parts of chemical binder. The chemical adhesive comprises at least one of polyvinyl alcohol, sodium silicate, sodium tripolyphosphate, carboxymethyl cellulose and silica sol.
Further, the preparation method of the silicon carbide precast block comprises the following steps: selecting raw materials according to the requirement of granularity, proportioning and mixing according to a proportion, mixing by a mixing roll, injection molding, drying, degreasing and sintering. The highest temperature after sintering is controlled to be 1400-1500 ℃, and is greater than the highest temperature in the flame path of 1300 ℃.
Referring to fig. 2 to 5, the fire damper 1 used in the maintenance method is rectangular in structure, larger than the fire channel in size, made of refractory material, and has a fire observation window 2 embedded in the upper part thereof for observing the movement of the hook 3 and the hook plate 4, and a rail groove 5 formed in the lower part thereof, wherein one end of the rail groove 5 is open for the hook 3 to penetrate.
Further, track groove 5 includes horizontal track groove 51 and vertical track groove 52, vertical track groove 52 upper end is located fender fire board 1 central point and puts, and the lower extreme is perpendicular with horizontal track groove 51, horizontal track groove 51 one end opening, hook 3 gets into the back from horizontal track groove 51 open end, both can translate in horizontal track groove 51, also can get into vertical track groove 52 and remove to avoid some bold hourglass material in the flame path.
Further, the diameter of the hook 3 is slightly smaller than the width of the track groove 5, the left side and the right side of the lower portion of the inner wall of the fire baffle plate 1 are respectively provided with a supporting block 6, and the distance between the two supporting blocks 6 is smaller than the width of a fire path to be maintained. Because the fire baffle 1 is only used temporarily when the fire path is maintained, the fire baffle 1 can be clamped in the fire path only by arranging the supporting block 6 below the inner wall of the fire baffle 1. When in use, the left hand can be used for assisting to press the fire baffle plate 1, and the right hand can be used for pulling the hook 3. By using the fire barrier 1, the flame impact on workers in frontal operation can be greatly reduced.
Preferably, the transverse rail groove 51 of the rail groove 5 is opened at the right end, so that the left opening space is reduced, the left hand of a worker wearing gloves can be conveniently pressed on the left side of the fire baffle plate 1, and the use habit of the left hand and the right hand of most people is met.
Furthermore, a handle is arranged on one side of the hook plate 4 of the hook 3, so that a worker can hold the hook conveniently. The hook plate 4 comprises a middle section of straight plate and two side inclined plates, the materials can be prevented from leaking out and sliding out when moving to the fire observation opening through the design of the two side inclined plates, the use efficiency of the hook plate 4 is increased, and the operation times of workers are reduced.
Preferably, scales are engraved on the hook 3, the scale is the smallest unit of centimeter, when the hook 3 is used for scraping leaked materials outwards, the specific position of the leaked material point can be known through the scales on the hook 3, so that a data reference is provided for the specific position of the silicon carbide precast block placed in the flame path, the silicon carbide precast block is conveniently and accurately positioned, and the center of the silicon carbide precast block is blocked near the central position of the leaked material point.
The specific maintenance method of the above petroleum coke calciner flue without furnace shutdown is described in the following by several different embodiments:
example 1
This embodiment damages to the flame path lighter, leaks the less condition of material.
The method comprises the following steps: and manufacturing a silicon carbide precast block. Taking the following raw materials in parts by weight: 38 parts of silicon carbide granularity sand, 42 parts of silicon dioxide, 2 parts of kaolin, 8 parts of metal silicon powder, 5 parts of kyanite, 2 parts of polyvinyl alcohol, 2 parts of sodium silicate and 2 parts of sodium tripolyphosphate. Then selecting raw materials according to the requirement of granularity, proportioning and mixing according to the proportion, mixing by a mixing roll, injection molding, drying, degreasing and sintering. The highest temperature after firing is controlled between 1400 ℃ and 1500 ℃ and is higher than the highest temperature in the flame path of 1300 ℃. The prepared silicon carbide precast block is shown in figure 1, and has the cross section size of 250mm x 170mm, the length of 0.8m and the thickness of 15 mm. The physical and chemical indexes of the prepared silicon carbide precast block are shown as follows:
index (I) Numerical value
Bulk density g/cm3 2.6
The apparent porosity is less than or equal to 18
Normal temperature compression strength is not less than MPa 80
Thermal shock qualitative (1100 ℃ water cooling) times 40
Coefficient of thermal expansion 1/DEG C10-6 5.0
Coefficient of thermal conductivity W/m.k 4.2
Normal temperature rupture strength MPa 25
High temperature rupture strength MPa 30
Step two: and disassembling the fire observation port of the flame path to be maintained.
Step three: and (4) plugging the fire observation opening disassembled from the step two into the fire path to be maintained by taking the silicon carbide precast block prepared in the step one.
Step four: the method comprises the following steps of taking a fire baffle plate 1 with the area larger than a fire viewing port, arranging a track groove 5 in the lower portion of the fire baffle plate 1, placing a hook 3 in the track groove 5, fixing a hook plate 4 at the tail end of the hook 3, arranging a supporting block 6 at the bottom of the inner side of the fire baffle plate 1, and buckling the fire baffle plate 1 on the fire viewing port to enable the supporting block 6 to be in contact with the lower plane of the fire viewing port.
Step five: the hook 3 is pushed to push the silicon carbide precast block to the position of a flame path material leakage point, so that the center of the silicon carbide precast block coincides with the center of the material leakage point, and the side surface of the silicon carbide precast block is contacted with the side wall of the flame path material leakage point to block the material leakage point of the calcining furnace.
Step six: and taking away the fire baffle 1 and the hook 3, building a fire observation opening of the flame path to be maintained again, and maintaining the flame path without stopping the furnace.
Example 2
This embodiment damages generally to the flame path, need to scrape the condition of scattering hourglass material.
The method comprises the following steps: and manufacturing a silicon carbide precast block. Taking the following raw materials in parts by weight: 47 parts of silicon carbide granularity sand, 35 parts of silicon dioxide, 3 parts of kaolin, 8 parts of metal silicon powder, 7 parts of kyanite, 3 parts of polyvinyl alcohol, 3 parts of carboxymethyl cellulose and 3 parts of silica sol. Then selecting raw materials according to the requirement of granularity, proportioning and mixing according to the proportion, mixing by a mixing roll, injection molding, drying, degreasing and sintering. The highest temperature after firing is controlled between 1400 ℃ and 1500 ℃ and is higher than the highest temperature in the flame path of 1300 ℃. The shape of the prepared silicon carbide precast block is shown in figure 1, the cross section dimension is 250mm x 170mm, the length is 1m, and the thickness is 16 mm. The physical and chemical indexes of the prepared silicon carbide precast block are shown as follows:
index (I) Numerical value
Bulk density g/cm3 2.7
The apparent porosity is less than or equal to 18
Normal temperature compression strength is not less than MPa 82
Thermal shock qualitative (1100 ℃ water cooling) times 41
Coefficient of thermal expansion 1/DEG C10-6 4.8
Coefficient of thermal conductivity W/m.k 4.1
Normal temperature rupture strength MPa 26
High temperature rupture strength MPa 32
Step two: and disassembling the fire observation port of the flame path to be maintained.
Step three: the method comprises the following steps of taking a fire baffle plate 1 with the area larger than a fire viewing port, arranging a track groove 5 in the lower portion of the fire baffle plate 1, placing a hook 3 in the track groove 5, fixing a hook plate 4 at the tail end of the hook 3, arranging a supporting block 6 at the bottom of the inner side of the fire baffle plate 1, and buckling the fire baffle plate 1 on the fire viewing port to enable the supporting block 6 to be in contact with the lower plane of the fire viewing port.
Step four: the hook 3 is moved to the upper end of the vertical rail groove 52 and is pushed forwards, the hook 3 can be rotated to avoid material leakage on the way, after the hook plate 4 is moved to the material leakage position, the scale value on the hook 3 at the moment is recorded, and then the material leakage is scraped outwards.
Step five: and (4) taking down the fire baffle plate 1, and inserting the fire observation port disassembled from the step (II) of the silicon carbide precast block prepared in the step (I) into the flame path to be maintained.
Step six: and (3) placing the fire baffle 1 on the fire observation opening, pushing the hook 3, subtracting half of the length of the silicon carbide prefabricated part according to the scale value recorded in the step four, pushing the silicon carbide prefabricated block to the position of a fire path material leakage point, enabling the center of the silicon carbide prefabricated block to coincide with the center of the material leakage point, and enabling the side surface of the silicon carbide prefabricated block to be in contact with the side wall of the fire path material leakage point to block the material leakage point of the calcining furnace.
Step seven: and taking away the fire baffle 1 and the hook 3, building a fire observation opening of the flame path to be maintained again, and maintaining the flame path without stopping the furnace.
Example 3
This embodiment damages seriously to the flame path, need clear up the condition that blocks up the hourglass material in the flame path.
The method comprises the following steps: and manufacturing a silicon carbide precast block. Taking the following raw materials in parts by weight: 48 parts of silicon carbide granularity sand, 45 parts of silicon dioxide, 5 parts of kaolin, 6 parts of metal silicon powder, 6 parts of kyanite, 1 part of sodium silicate, 1 part of sodium tripolyphosphate, 2 parts of carboxymethyl cellulose and 3 parts of silica sol. Then selecting raw materials according to the requirement of granularity, proportioning and mixing according to the proportion, mixing by a mixing roll, injection molding, drying, degreasing and sintering. The highest temperature after sintering is controlled to be 1400-1500 ℃, and is greater than the highest temperature in the flame path of 1300 ℃. The shape of the prepared silicon carbide precast block is shown in figure 1, the cross section dimension is 250mm x 170mm, the length is 1m, and the thickness is 17 mm. The physical and chemical indexes of the prepared silicon carbide precast block are shown as follows:
Figure BDA0002650300270000081
Figure BDA0002650300270000091
step two: and disassembling the fire observation port of the flame path to be maintained.
Step three: the method comprises the following steps of taking a fire baffle plate 1 with the area larger than a fire viewing port, arranging a track groove 5 in the lower portion of the fire baffle plate 1, placing a hook 3 in the track groove 5, fixing a hook plate 4 at the tail end of the hook 3, arranging a supporting block 6 at the bottom of the inner side of the fire baffle plate 1, and buckling the fire baffle plate 1 on the fire viewing port to enable the supporting block 6 to be in contact with the lower plane of the fire viewing port.
Step four: move hook 3 to vertical track groove 52 upper end to impel forward, accessible rotary hook 3 avoids the hourglass material on the way, and behind hook plate 4 moved to the hourglass material point position, record the scale interval on hook 3 this moment, then through pulling hook 3 many times, scrape totally with the interior hourglass material of flame path.
Step five: and (4) taking down the fire baffle plate 1, and inserting the fire observation port disassembled from the step (II) of the silicon carbide precast block prepared in the step (I) into the flame path to be maintained.
Step six: and (3) placing the fire baffle 1 on the fire observation opening, pushing the hook 3, subtracting half of the length of the silicon carbide prefabricated part according to the scale value recorded in the step four, pushing the silicon carbide prefabricated block to the position of a fire path material leakage point, enabling the center of the silicon carbide prefabricated block to coincide with the center of the material leakage point, and enabling the side surface of the silicon carbide prefabricated block to be in contact with the side wall of the fire path material leakage point to block the material leakage point of the calcining furnace.
Step seven: and taking away the fire baffle 1 and the hook 3, building a fire observation opening of the flame path to be maintained again, and maintaining the flame path without stopping the furnace.
By the maintenance method for the flame path of the petroleum coke calcining furnace without stopping the furnace, the material leakage point of the flame path can be maintained under the condition that the calcining furnace is not stopped, the hollow silicon carbide prefabricated part is stuffed into the flame path, the material leakage point is blocked, and the fire passes through the middle of the silicon carbide prefabricated part. Compared with the traditional mode that the fire path is maintained and needs to be rebuilt by taking off the furnace, the maintenance time is greatly saved, and the loss of enterprises caused by the fact that the furnace needs to be shut down in the fire path maintenance is reduced. Moreover, by using the fire baffle plate and the hook, the influence of high-temperature flame in the flame path on operators during maintenance without stopping the furnace is reduced, the leakage of the flame path can be conveniently eliminated, and the position of the silicon carbide prefabricated part can be accurately positioned.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or additions or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A furnace shutdown maintenance method for a fire path of a petroleum coke calcining furnace is characterized by comprising the following steps:
the method comprises the following steps: disassembling a fire observation port of a flame path to be maintained;
step two: filling the silicon carbide precast block into the flame path to be maintained from the flame viewing port disassembled in the step one;
step three: adjusting the position of the silicon carbide precast block, and blocking a material leakage point of the calcining furnace;
step four: and building a fire observation port of the flame path to be maintained again.
2. The method for maintaining the fire path of the petroleum coke calcining furnace without shutting down the furnace is characterized by comprising the following steps of:
the method comprises the following steps: disassembling a fire observation port of a flame path to be maintained;
step two: taking a fire baffle plate (1) with the area larger than that of a fire observation opening, arranging a rail groove (5) at the lower part of the fire baffle plate, placing a hook (3) in the rail groove (5), fixing a hook plate (4) at the tail end of the hook (3), extending the hook (3) to a material leakage point of a calcining furnace, and scraping out the leaked material;
step three: filling the silicon carbide precast block into the flame path to be maintained from the flame viewing port disassembled in the step one;
step four: adjusting the position of the silicon carbide precast block, and blocking a material leakage point of the calcining furnace;
step five: and building a fire observation port of the flame path to be maintained again.
3. The method for maintaining the fire path of the petroleum coke calcining furnace without shutting down the furnace as claimed in claim 1 or 2, wherein the silicon carbide precast block is a hollow rectangular block.
4. The method for maintaining the flame path of the petroleum coke calcining furnace without shutdown as claimed in claim 3, wherein the height of the silicon carbide precast block is greater than 1/2 of the flame path to be maintained, and the wall thickness is not less than 15 mm.
5. The method for maintaining a refinery coke calciner flue without shutdown as claimed in any one of claims 1 to 4, wherein the length of the silicon carbide precast block is greater than 0.8 m.
6. The method for maintaining the fire path of the petroleum coke calcining furnace without shutting down the furnace is characterized in that the silicon carbide precast block comprises the following components in percentage by weight: 30-50 parts of silicon carbide granularity sand, 30-50 parts of silicon dioxide, 1-5 parts of kaolin, 6-10 parts of metal silicon powder, 3-10 parts of kyanite and 4-10 parts of chemical binder.
7. The method for maintaining the fire path of the petroleum coke calcining furnace without shutting down the furnace is characterized in that the method for preparing the silicon carbide precast block comprises the following steps: selecting raw materials according to the requirement of granularity, proportioning and mixing according to a proportion, mixing by a mixing roll, injection molding, drying, degreasing and sintering.
8. The method for maintaining the flame path of the petroleum coke calcining furnace without stopping the furnace as claimed in claim 2, characterized in that a fire window is embedded in the upper part of the fire baffle plate (1), a track groove (5) is arranged below the fire baffle plate, and one end of the track groove (6) is opened.
9. The method for maintaining the fire channel of the petroleum coke calcining furnace without shutting down the furnace is characterized in that the rail grooves (5) comprise transverse rail grooves (51) and vertical rail grooves (52), the upper ends of the vertical rail grooves (52) are positioned at the center of the fire baffle plate (1), the lower ends of the vertical rail grooves are vertical to the transverse rail grooves (51), and one ends of the transverse rail grooves (51) are open.
10. The method for maintaining the flame path of the petroleum coke calcining furnace without shutdown is characterized in that the diameter of the hook (3) is smaller than the width of the track groove (5), supporting blocks (6) are arranged below the inner wall of the fire baffle plate (1) at least at the left side and the right side, and the distance between the two supporting blocks (6) which are farthest away is smaller than the width of the flame path to be maintained.
CN202010867991.9A 2020-08-26 2020-08-26 Maintenance method for stopping furnace of petroleum coke calcining furnace fire path Pending CN112010652A (en)

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