A soot blower sleeve connection

Abstract

The application relates to a soot blower sleeve connecting structure which comprises a shell and a sleeve assembly. The connecting position of the sleeve and the soot blower shell is completely sealed by welding to prevent gas leakage at the connecting position. The soot blower is divided into two sleeve assemblies, the two sleeve assemblies are spaced, the outer pipe of a part of the sleeve assemblies is extended, the inner pipe of another part of the sleeve assemblies is extended into the outer pipe, the two parts are supported by the structure to prevent the sleeve from sagging due to heat; the extended outer pipe and the other outer pipe are spaced at a certain distance, and the extended inner pipe and the other inner pipe are spaced at a certain distance to relieve the thermal expansion stress of the sleeve; the two outer pipes are connected through an inner connecting pipe, and the two sleeve assemblies form a steam loop, so that the cooling effect is more continuous and uniform. The soot blower sleeve connecting structure effectively avoids the problem that the supporting member is prone to creep collapse and deformation due to heat, has a simple structure, is safe and reliable, and can also reduce the production manufacturing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to an air preheater soot blower, in particular a high-temperature air preheater soot blower. BACKGROUND

[0002] The existing sleeve distribution of the soot blower can be divided into two kinds, one is the whole distribution, and the other is the two half distribution. The whole distribution adopts the parallel arrangement of the whole sleeve, the thermal stress is released by outward expansion, the connection between the sleeve and the shell cannot be completely sealed, and there is a risk of gas leakage. The two half distribution is to divide the sleeve into two parts, that is, there are two steam loops. The thermal stress of this form of sleeve can be released inwardly, but an external support is needed to support the end of the sleeve to prevent the end of the sleeve from being deformed by heat. Since the support is exposed outside the sleeve, the support cannot be cooled in time under the long-time high-temperature operation of the soot blower, and the support is prone to creep collapse, and the sleeve is prone to sagging.

[0003] Therefore, it is necessary to develop a soot blower sleeve connection structure which can not only isolate the gas leakage between the sleeve and the shell and relieve the thermal expansion stress of the sleeve, but also be cooled in time without being deformed by heat. SUMMARY

[0004] In order to solve the above problems, the present application provides a soot blower sleeve connection structure.

[0005] The technical scheme adopted by the present application is as follows:

[0006] A soot blower sleeve connection structure, comprising: a shell, a sleeve assembly, characterized in that: the connection position of the sleeve and the soot blower shell is completely sealed by welding to prevent gas leakage at the connection; the sleeve assembly specifically comprises an inner tube, an outer tube, an inner communication tube, an outer communication tube and a nozzle, the inner communication tube is located outside the outer tube, and the outer communication tube is located outside the shell; the soot blower is divided into two sleeve assemblies, the two sleeve assemblies are spaced apart, a part of the outer tube of the sleeve assembly is extended, and the inner tube of the other part of the sleeve assembly is inserted into the extended outer tube, and the two are supported by their own structures to prevent the sleeve from sagging due to heat; the extended outer tube and the other part of the outer tube are spaced apart, and the elongated inner tube and the other part of the inner tube are also spaced apart to relieve the thermal expansion stress of the sleeve; the two parts of the outer tube are connected through the inner communication tube, and the two sleeve assemblies form a steam loop, so that the cooling effect is more continuous and uniform.

[0007] The inner tube is connected to the nozzle and communicates with the nozzle; the outer tube is connected to the cooling steam, and a plurality of sleeves are arranged in parallel to form a sleeve assembly; the cooling steam forms a loop in the connected outer tube through the connection of the outer communication tube and the inner communication tube.

[0008] The present application has the following advantages:

[0009] 1. The sleeve and the shell are completely sealed and connected by welding, no gas leaks, effectively avoiding the safety problems of fire and burning caused by gas leakage.

[0010] 2. Since the sleeve and the shell are connected by welding, the thermal expansion stress of the sleeve cannot be released outward, so it needs to expand inward. The inner part of the soot blower is provided with two part sleeve assemblies, and a certain space is left between the outer pipes and the inner pipes of the two part sleeves, which can effectively relieve the expansion stress caused by heating.

[0011] 3. Without using external support, the inner and outer pipes support each other, effectively avoiding the problems of support to the flue gas flow, the support weld cracking under long-term operation, and the support prone to thermal creep collapse deformation.

[0012] 4. The inner communication pipe connects the outer pipes of the two part sleeve assemblies, so that the two part sleeves form a steam loop, which can avoid the problem of dead angle in the two part steam loop, and also make the steam cooling effect better and continuous and uniform.

[0013] 5. The sleeve connection structure of the soot blower is simple in structure, safe and reliable, and can also reduce the production cost. DETAILED DESCRIPTION

[0014] Figure 1 It is a schematic view of a sleeve connection structure of a soot blower.

[0015] Figure 2 It is Figure 1 It is a sectional view of the sleeve connection structure of the soot blower shown in the figure along the A-A sectional line direction.

[0016] Figure 3 It is Figure 1 It is a local enlarged view of the I position of the sleeve connection structure of the soot blower shown in the figure, and the dashed line is the position of the inner and outer pipes after heating expansion.

[0017] In the figure: 1 is the shell, 2 is the sleeve assembly; 21 is the inner pipe, 22 is the outer pipe, 23 is the outer communication pipe, 24 is the inner communication pipe, and 25 is the nozzle. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only one of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] See Figure 1-Figure 3, the present invention provides a sootblower sleeve connection structure.

[0020] like Figure 1-Figure 3 As shown, a sootblower sleeve connection structure includes: a shell 1 and a sleeve assembly 2.

[0021] Among them, the sleeve assembly 2 specifically includes an inner tube 21, an outer tube 22, an outer connecting tube 23, an inner connecting tube 24, and a nozzle 25. The inner connecting tube 24 is located outside the outer tube 22, and the outer connecting tube 23 is located outside the shell 1; the inner tube 21 is fed with blowing gas and connected with the nozzle 25; the outer tube 22 is fed with cooling steam, and multiple sleeves are connected in series side by side to form a sleeve assembly 2. Through the connection of the outer connecting tube 23 and the inner connecting tube 24, the cooling steam forms a loop in the connected outer tube 22.

[0022] Among them, the connection position between the shell 1 and the outer tube 22 is completely sealed by welding to prevent gas leakage at the connection position; two left and right sleeve assemblies 2 are arranged inside the soot blower, and between the two sleeve assemblies 2, one part of the sleeve outer tube 22 is extended, and the other part of the sleeve inner tube 21 is extended into the extended outer tube 22, and they use their own structure to support each other to prevent the sleeve from sagging due to heat; the extended outer tube 22 and the other part of the outer tube, and the extended inner tube 21 and the other part of the inner tube are separated by a certain distance, so when heated, the inner tube 21 can expand and expand in the extended outer tube 22 to alleviate the problem of thermal expansion stress of the sleeve; the two parts of the outer tube 22 are connected by an internal connecting tube 24, and the two sleeve assemblies form a steam circuit, so that the cooling effect is more continuous and uniform.

[0023] During operation, because outer tube 22 and housing 1 are welded and sealed, gas flows through the tube without leakage, effectively preventing safety issues such as fire and combustion caused by gas leakage. In addition, thermal expansion stress on the casing is relieved by inward expansion. A portion of inner tube 21 extends into another portion of outer tube 22, relieving its own expansion stress and providing mutual support to prevent the casing from sagging due to heat.

Claims

1. A sootblower casing connection structure, comprising: The casing and sleeve assembly is characterized in that the connection between the sleeve assembly and the sootblower casing is completely sealed by welding to prevent gas leakage at the connection; The casing assembly specifically includes an inner tube, an outer tube, an outer connecting tube, an inner connecting tube, and a nozzle. The inner connecting tube is located outside the outer tube, and the outer connecting tube is located outside the shell. Between the two casing assemblies in the sootblower, one part of the casing outer tube extends, and the other part of the casing inner tube extends into the extended outer tube. The casing supports each other with its own structure to prevent the casing from sagging due to heat. The extended outer tube and the other outer tube, as well as the extended inner tube and the other inner tube are all separated by a certain distance to alleviate the problem of thermal expansion stress of the casing; The outer pipes of the two parts are connected by an internal connecting pipe, and the two sleeve assemblies form a steam circuit, making the cooling effect more continuous and uniform; The inner tube is fed with blowing gas and connected with the nozzle; the outer tube is fed with cooling steam. Multiple sleeves are connected in series to form a sleeve assembly. Through the connection of the outer connecting tube and the inner connecting tube, the cooling steam forms a loop in the connected outer tube.

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