Hot quick repair method for cement burning system decomposing furnace

Abstract

The application provides a cement burning system decomposing furnace hot-state rapid repair method, and belongs to the technical field of decomposing furnace repair construction. The cement burning system decomposing furnace hot-state rapid repair method is used for the part of the decomposing furnace that needs to be repaired, and the construction operation is performed through the operations of surface cleaning of the decomposing furnace repair part, opening of the decomposing furnace repair part, preparation of a pouring mold structure, secondary formwork pouring, tertiary formwork pouring, restoration pouring of the opening part of the decomposing furnace and repair completion treatment. In the repair, the repair pouring can be divided into several different pouring stages, so that the repair construction is simpler and more convenient, the construction time of the decomposing furnace internal refractory brick falling is shortened from about 100 hours to 24 hours, the construction safety coefficient is improved, the construction time is shortened, the decomposing furnace can be put into use more quickly, and economic loss is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of decomposing furnace repair construction, in particular, relates to the cement burning system decomposing furnace hot state rapid repair method. BACKGROUND

[0002] The decomposing furnace is a new type of thermal equipment in which fuel combustion, heat exchange and decomposition reaction are simultaneously carried out; its types and forms are various. The basic principle is that preheated raw meal, a certain amount of fuel and an appropriate amount of hot gas are simultaneously fed into the decomposing furnace, and the raw meal is in a suspended or boiling state in the furnace; below 900 DEG C, the fuel is flameless combustion, and the heat transfer and calcium carbonate decomposition process are simultaneously completed at high speed; the combustion time of the fuel and the time required for calcium carbonate decomposition are about 2-4s, at this time the calcium carbonate decomposition rate of the raw meal can reach 85%-95%, and the temperature of the preheated raw meal is 800-850 DEG C. Solid, liquid or gaseous fuel can be used in the decomposing furnace, and coal powder is mainly used as fuel in China, and the fuel added into the decomposing furnace accounts for about 55%-65% of the total fuel.

[0003] The diameter of the decomposing furnace of the cement burning system is 6.5-7.2 meters, and the height is about 45 meters. The lining is mainly refractory bricks, and the refractory brick lining will also fall off during use. Therefore, the conventional treatment method for the falling of the refractory bricks of the decomposing furnace is to stop feeding and cool the kiln for at least 36 hours, then perform decomposing furnace skin cleaning, and the cleaning process takes about 48-64 hours. Then a scaffold construction platform is erected, and this process takes about 8 hours. The repair time is 6 to 24 hours, which is not fixed. In this way, the construction is relatively complex and difficult in the decomposing furnace repair process, the safety factor is relatively low, and the repair time exceeds 100 hours, which affects the work efficiency. SUMMARY

[0004] In order to make up for the above shortcomings, the present application provides a cement burning system decomposing furnace hot state rapid repair method, which aims to improve the cement burning system decomposing furnace hot state rapid repair method, and solve the problems of relatively complex and difficult construction, low safety factor, and long repair time exceeding 100 hours in the decomposing furnace repair process.

[0005] The present application is implemented as follows:

[0006] The present application provides a cement burning system decomposing furnace hot state rapid repair method, which comprises the following steps:

[0007] S1: repairing surface cleaning: impurities are cleaned from the surface to be repaired, and the repair site is expanded to make the repair site more regular;

[0008] S2: opening of the decomposing furnace repair site: a first pouring opening is formed on the outside of the decomposing furnace for the repair site of the decomposing furnace;

[0009] S3: making a pouring mold structure: for the decomposing furnace repair part, a hanging welding anchor hole is formed on the inner surface, at this time, vertical support mold rods are fixed on the decomposing furnace repair part, and then a mold plate is inserted between the mold rods and the inner surface of the decomposing furnace to cover the outside of the repair part for primary pouring;

[0010] S4: secondary mold supporting pouring: after the primary pouring material enters the initial setting state, the mold plate is continuously inserted between the mold rods and the inner surface of the decomposing furnace to cover the outside of the repair part for secondary pouring;

[0011] S5: tertiary mold supporting pouring: after the secondary pouring material enters the initial setting state, the mold plate is continuously inserted between the mold rods and the inner surface of the decomposing furnace to make the mold plate fully cover the outside of the repair part for tertiary pouring;

[0012] S6: restoring pouring at the opening of the decomposing furnace: a second pouring port is formed on the outside of the decomposing furnace above the opening, and the pouring material is poured into the second pouring port to complete the restoring pouring of the first pouring port;

[0013] S7: repair completion processing, pouring material closing and construction joint processing are performed to complete the repair operation.

[0014] In an embodiment of the present application, the step S1 transports the construction personnel to the decomposing furnace repair part by a basket, and then the operator cleans or expands the impurities or refractory bricks at the decomposing furnace through external mechanical setting to make them more regular.

[0015] In an embodiment of the present application, the size of the first pouring port in the step S2 is 1.2m*0.4m.

[0016] In an embodiment of the present application, the hanging welding anchor hole in the step S3 is ￠15mm, and the hanging welding anchor holes are uniformly distributed on the surface of the repair part.

[0017] In an embodiment of the present application, the shape of the hanging welding anchor in the step S3 is a "Y" type, and the hanging welding anchor is welded.

[0018] In an embodiment of the present application, the vertical support mold rods in the step S3 are distributed at equal distances, and the vertical support mold rods are fixed on the inner wall of the decomposing furnace through tension bolts.

[0019] In an embodiment of the present application, a guide hopper is fixed at the second pouring port in the step S6, and the cross section of the guide hopper is a right triangle.

[0020] In an embodiment of the present application, the caliber of the second pouring port in the step S6 is smaller than the caliber of the first pouring port.

[0021] The beneficial effects of the present application are that the impurity cleaning and the extension of the repaired surface make the repaired surface more regular, then the first pouring opening is arranged outside the decomposing furnace for the repaired surface of the decomposing furnace, at this time, the through hole of the hanging welding anchor is arranged on the inner surface of the decomposing furnace for the repaired surface of the decomposing furnace, at this time, the vertical support mold rod is fixed for the repaired surface of the decomposing furnace, then the mold plate is inserted between the mold rod and the inner surface of the decomposing furnace to cover the outside of the repaired surface for primary pouring, then the mold plate is continuously inserted between the mold rod and the inner surface of the decomposing furnace to cover the outside of the repaired surface for secondary pouring after the primary pouring material enters the initial setting state, the mold plate is continuously inserted between the mold rod and the inner surface of the decomposing furnace to make the mold plate fully cover the outside of the repaired surface for tertiary pouring, then the second pouring opening is arranged above the opening on the outside of the decomposing furnace, the pouring material is poured into the second pouring opening to complete the recovery pouring of the first pouring opening, finally, the pouring material is closed and the construction joint is treated, and the repairing operation is completed, so that the pouring can be divided into several different pouring stages in the pouring process, the construction time of the decomposing furnace internal refractory brick falling is shortened from about 100 hours to 24 hours, the construction safety factor is improved, and the construction time is shortened. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. Other related drawings can also be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is a schematic diagram of step S1 of the rapid hot-state repairing method of the cement burning system decomposing furnace provided by the embodiments of the present application;

[0024] Figure 2 is a schematic diagram of step S2 of the rapid hot-state repairing method of the cement burning system decomposing furnace provided by the embodiments of the present application;

[0025] Figure 3 is a schematic diagram of step S3 of the rapid hot-state repairing method of the cement burning system decomposing furnace provided by the embodiments of the present application;

[0026] Figure 4 is a schematic diagram of step S4 of the rapid hot-state repairing method of the cement burning system decomposing furnace provided by the embodiments of the present application;

[0027] Figure 5 is a schematic diagram of step S5 of the rapid hot-state repairing method of the cement burning system decomposing furnace provided by the embodiments of the present application;

[0028] Figure 6is a schematic diagram of step S6 of the hot-state rapid repair work method of the cement calcining system decomposing furnace provided by the embodiment of the present application;

[0029] Figure 7 is a schematic diagram of step S7 of the hot-state rapid repair work method of the cement calcining system decomposing furnace provided by the embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] Therefore, the detailed description of the embodiments of the present application provided below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0034] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly interpreted, for example, can be fixed connection, can also be detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0036] Embodiment

[0037] The present application provides a cement burning system decomposition furnace hot state rapid repair method, comprising the following steps:

[0038] Please refer to Figure 1 , S1: repair surface cleaning: impurities are cleaned for the repaired surface, and the repair is expanded to make the repair more regular; step S1 transports the construction personnel to the repair site of the decomposition furnace by the basket, and then the operator cleans or expands the impurities or refractory bricks at the repair site of the decomposition furnace through the external mechanical setting, so that the repair site is more regular. In this way, the castable can be more fully filled into the repair site during casting.

[0039] Please refer to Figure 2 , S2: opening of the decomposition furnace repair site: a first pouring opening is provided outside the decomposition furnace for the repair site of the decomposition furnace; the size of the first pouring opening in step S2 is 1.2m*0.4m. Here, the setting of the first pouring opening is beneficial to filling and pouring the large-scale repair of the decomposition furnace, so that the pouring is more convenient.

[0040] Please refer to Figure 3S3: making a pouring mold structure: for the disintegrating furnace repair part, a hanging welding anchor hole is opened on its inner surface, at this time, a vertical support mold rod is fixed for the disintegrating furnace repair part, then a mold plate is inserted between the mold rod and the inner surface of the disintegrating furnace to cover the outside of the repair part for pouring once; in step S3, the hanging welding anchor hole is 15mm, and the hanging welding anchor holes are uniformly distributed on the surface of the repair part; in step S3, the shape of the hanging welding anchor is "Y" type, and the hanging welding anchor is welded; here, the hanging welding anchor plays a role of framework in the pouring process, so that the castable can be better attached to the inner wall of the disintegrating furnace, thereby facilitating the extension of the service life after repair; in step S3, the vertical support mold rod is distributed at equal distances, and the vertical support mold rod is fixed on the inner wall of the disintegrating furnace by means of a tension bolt; here, the vertical support mold rod distributed at equal distances can improve the stability after the mold plate is inserted, so that the mold plate is fixed more firmly.

[0041] Please refer to Figure 4 S4: secondary mold supporting pouring: after the castable of the primary pouring enters the initial setting state, the mold plate is continuously inserted between the mold rod and the inner surface of the disintegrating furnace to cover the outside of the repair part for secondary pouring.

[0042] Please refer to Figure 5 S5: tertiary mold supporting pouring: after the castable of the secondary pouring enters the initial setting state, the mold plate is continuously inserted between the mold rod and the inner surface of the disintegrating furnace, so that the mold plate fully covers the outside of the repair part for tertiary pouring.

[0043] Please refer to Figure 6 S6: restoring pouring at the opening of the disintegrating furnace: a second pouring port is opened above the opening on the outside of the disintegrating furnace, and the castable is poured into it to complete the restoring pouring of the first pouring port.

[0044] Please refer to Figure 7 S7: repair completion processing, castable closing and construction joint processing are carried out, and the repair operation is completed; in step S6, a material guide hopper is fixed at the second pouring port, and the cross section of the material guide hopper is a right triangle; in step S6, the diameter of the second pouring port is smaller than that of the first pouring port, and through the setting of the right triangle material guide hopper, the castable can be conveniently input into the first pouring port, and the castable can be more conveniently input into the first pouring port, which is conducive to pouring the first pouring port.

[0045] The working principle of the cement burning system decomposition furnace hot state rapid repair method is as follows: the impurities on the repaired surface are cleaned, and the repaired part is expanded to make the repaired part more regular, then a first pouring opening is formed on the outside of the decomposition furnace, a hanging welding anchor hole is formed on the inner surface of the repaired part of the decomposition furnace, a vertical support mold rod is fixed on the repaired part of the decomposition furnace, then a mold plate is inserted between the mold rod and the inner surface of the decomposition furnace to cover the outside of the repaired part for one-time pouring, then when the pouring material of the primary pouring enters the initial setting state, the mold plate is continuously inserted between the mold rod and the inner surface of the decomposition furnace to cover the outside of the repaired part for secondary pouring, when the pouring material of the secondary pouring enters the initial setting state, the mold plate is continuously inserted between the mold rod and the inner surface of the decomposition furnace to make the mold plate fully cover the outside of the repaired part for three-time pouring, then a second pouring opening is formed above the opening on the outside of the decomposition furnace, the pouring material is poured into the second pouring opening to complete the recovery pouring of the first pouring opening, finally, the pouring material is closed and the construction joint is treated, and the repair operation is completed, so that the pouring can be divided into several different pouring stages during the pouring process, the construction time of the decomposition furnace internal refractory brick falling off can be shortened from about 100 hours to 24 hours, the construction safety factor is improved, and the construction time is shortened.

[0046] The above is only the preferred embodiment of the present application and is not used to limit the present application. The present application can have various changes and variations for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for hot rapid repair of a cement kiln preheater, characterized in that, It comprises the following steps: S1: repairing surface cleaning: impurity cleaning and repairing of the surface of the repair to make the repair more regular; S2: opening of the repair of the decomposition furnace: a first pouring opening is provided on the outside of the decomposition furnace for the repair of the decomposition furnace; S3: making a pouring mold structure: a hanging welding anchor hole is provided on the inner surface of the decomposition furnace repair, at which time the vertical support mold rod is fixed to the decomposition furnace repair, and then the mold plate is inserted between the mold rod and the inner surface of the decomposition furnace to cover the outside of the repair for the first pouring; S4: secondary formwork pouring: after the initial pouring of the pouring material enters the initial setting state, the mold plate is continuously inserted between the mold rod and the inner surface of the decomposition furnace to cover the outside of the repair for secondary pouring; S5: third time formwork pouring: after the second pouring of the pouring material enters the initial setting state, the mold plate is continuously inserted between the mold rod and the inner surface of the decomposition furnace to make the mold plate fully cover the outside of the repair for the third pouring; S6: restoring pouring at the opening of the decomposition furnace: a second pouring opening is provided above the opening on the outside of the decomposition furnace, and the pouring material is poured into it to complete the restoration pouring of the first pouring opening; S7: repair completion processing, pouring closing and construction joint processing are carried out to complete the repair operation.

2. The hot-face rapid repair method of a cement kiln preheater according to claim 1, wherein The step S1 transports the construction personnel to the decomposition furnace repair by a basket, and then the operator cleans or expands the impurities or refractory bricks at the decomposition furnace by external mechanical setting to make them more regular.

3. The hot stove quick repair method of cement calcining system decomposing furnace according to claim 1, characterized in that, The size of the first pouring opening in step S2 is 1.2m*0.4m.

4. The hot stove quick repair method of cement calcining system decomposing furnace according to claim 1, characterized in that, The hanging welding anchor hole in step S3 is ￠15mm, and the hanging welding anchor holes are uniformly distributed on the surface of the repair.

5. The hot stove quick repair method of cement kiln system decomposing furnace according to claim 1, characterized in that, The shape of the hanging welding anchor in step S3 is "Y" type, and the hanging welding anchor is welded.

6. The hot stove quick repair method of cement kiln system decomposing furnace according to claim 1, characterized in that, The vertical support mold rod in step S3 is equally spaced, and the vertical support mold rod is fixed to the inner wall of the decomposition furnace by tension bolts.

7. The hot stove quick repair method of cement kiln according to claim 1, characterized in that, The second pouring opening in step S6 is fixed with a material guide hopper, and the cross section of the material guide hopper is a right triangle.

8. The hot stove quick repair method of a cement calcining system decomposing furnace according to claim 1, characterized in that, The caliber of the second pouring opening in step S6 is smaller than the caliber of the first pouring opening.

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