Hydraulic dismounting method of low-nitrogen cyclone burner of coal-fired boiler

Abstract

The hydraulic dismounting method of the low-nitrogen cyclone burner of the coal-fired boiler usually needs multiple manual hoists to be used to completely dismount or install the burner central air duct and the primary air duct, the time used in the maintenance process is long, and a large amount of labor is consumed.The present application comprises the following steps: placing the telescopic hydraulic cylinder into the burner central air duct or the primary air duct; installing the adjusting support and the adjusting support seat on the end of the telescopic hydraulic cylinder, adjusting the adjusting support to a proper height; installing the jacking hydraulic cylinder on the other end of the telescopic hydraulic cylinder; adjusting the height of the jacking hydraulic cylinder to slightly lift the burner central air duct or the primary air duct; next, fixing the jacking hydraulic cylinder support and the telescopic hydraulic cylinder with two sets of support frames; finally, operating the telescopic hydraulic cylinder to move forward or backward to dismount or install the burner central air duct or the primary air duct.The present application is used for the hydraulic dismounting of the low-nitrogen cyclone burner of the coal-fired boiler.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of low nitrogen swirl burner hydraulic dismounting method of coal-fired boiler. BACKGROUND

[0002] In recent years, with the continuous acceleration of science and technology, all walks of life are developing rapidly, and the demand for electricity is also increasing. At present, the main power generation method in China is coal-fired power generation, and the boiler is the most important mechanical equipment in the operation of thermal power generation. It is necessary to study the efficiency and effect of its use. For large boilers, coal combustion is the main way to obtain energy. In order to meet the needs of coal market and reduce fuel costs, different coal blending is the current exploration of boiler operation. With the diversification and complexity of blended coal, the adaptability of the burner is getting worse, which is easy to cause the burner to burn out. In order to improve the adaptability of the burner to complex coal blending, the burner needs to be repaired or modified regularly.

[0003] The current coal-fired power plant burner mainly uses low-nitrogen swirl burner, and the front and back wall opposite or staggered arrangement method is widely used. The burner mainly includes center air cylinder (including thick and thin separator), primary air cylinder, secondary air cylinder, expansion cone and stable combustion ring, etc. The main parts of the boiler burner are easy to burn out after long-term operation, and need to be repaired. Due to the large volume and heavy weight of the primary air cylinder and center air cylinder of the burner, the space on site is small, and the repair is very inconvenient. Usually, multiple manual hoists are needed to lift and drag, and the repair workload is large and the repair period is long. Therefore, how to improve the work efficiency of the burner repair or replacement has become a technical problem to be solved by the technical personnel in the field.

[0004] At present, the current coal-fired power plant burner mainly uses front and back wall opposite or staggered arrangement method, and the space for on-site construction is limited. During the repair process of the burner, multiple manual hoists are used to lift and drag. Due to the limitations of manual hoists, multiple manual hoists are usually needed to reverse use, so that the burner center air cylinder and primary air cylinder can be completely removed or installed in place. The repair process takes a long time and consumes a lot of labor. On the other hand, in order to meet the needs of the power grid, the coal-fired power plant must ensure that the unit can operate safely and stably for a long period of time, and it is impossible to frequently shut down the unit for burner repair. SUMMARY

[0005] The purpose of the present application is to solve the problems in the prior art and provide a low-nitrogen swirl burner hydraulic dismounting method of coal-fired boiler.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: a low-nitrogen swirl burner hydraulic dismounting method of coal-fired boiler, which comprises the following steps:

[0007] (1) The six main components of the lifting hydraulic cylinder support, the lifting hydraulic cylinder, the support frame, the telescopic hydraulic cylinder, the adjusting support and the adjusting support seat can be disassembled, and assembled on site when in use;

[0008] (2) First, the telescopic hydraulic cylinder is placed inside the burner central wind pipe or the primary air pipe; then the adjusting support and the adjustable support seat are installed at the end of the telescopic hydraulic cylinder, and the adjusting support is adjusted to the appropriate height according to actual needs;

[0009] (3) Then the lifting hydraulic cylinder is installed at the other end of the telescopic hydraulic cylinder, that is, the other end of the disassembled or installed component; next, the lifting hydraulic cylinder support is connected with the lifting hydraulic cylinder through bolts, and the height of the lifting hydraulic cylinder is adjusted to slightly lift the burner central wind pipe or the primary air pipe;

[0010] (4) Next, the lifting hydraulic cylinder support and the telescopic hydraulic cylinder are fixed by two sets of support frames; finally, the telescopic hydraulic cylinder is operated to move forward or backward, and the burner central wind pipe or the primary air pipe is disassembled or installed in place.

[0011] The hydraulic disassembly and assembly method of the low-nitrogen cyclone burner of the coal-fired boiler, one end of the telescopic hydraulic cylinder is fixed with the adjusting support;

[0012] The other end of the telescopic hydraulic cylinder is fixed with the push rod of the lifting hydraulic cylinder, and the bottom of the lifting hydraulic cylinder is fixed with the lifting hydraulic cylinder support;

[0013] The lifting hydraulic cylinder support is connected with the telescopic hydraulic cylinder through the support frame.

[0014] The hydraulic disassembly and assembly method of the low-nitrogen cyclone burner of the coal-fired boiler, the adjusting support includes an adjusting support and an adjusting support seat, the adjusting support seat is sleeved on the adjusting support, a plurality of positioning holes are formed in the adjusting support, and the fixing bolts threadedly connected on the adjusting support seat pass through the positioning holes to fix the adjusting support.

[0015] The hydraulic disassembly and assembly method of the low-nitrogen cyclone burner of the coal-fired boiler, the support frame includes two screw rods and a screw sleeve, the two screw rods are threadedly connected at both ends of the screw sleeve, one end of one screw rod is hinged with the lifting hydraulic cylinder support, and the other end of the other screw rod is hinged with the telescopic hydraulic cylinder.

[0016] The hydraulic disassembly and assembly method of the low-nitrogen cyclone burner of the coal-fired boiler, the bottom of the lifting hydraulic cylinder support is connected with a universal wheel.

[0017] Advantages

[0018] 1. The present application has simple structure, convenient assembly and convenient transportation, and has low requirements for space and site of operation site; the device is simple and flexible to operate, only needs to adjust the adjustable support 5 and the jacking hydraulic cylinder 2 to a suitable height, fix the jacking hydraulic cylinder support 1 and the telescopic hydraulic cylinder 4 with the basket bolt, then operate the telescopic hydraulic cylinder to act, and the main parts of the burner can be disassembled or installed.

[0019] 2. The present application can quickly complete the disassembly and installation of the center wind pipe or the primary air pipe of the burner main part, improve the maintenance work efficiency, reduce the labor input and the maintenance cost; at the same time, the large amount of manual hoist lifting and transportation work of the maintenance personnel is avoided every time the burner is maintained, the maintenance labor intensity is greatly reduced, and the maintenance safety hidden danger is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the present application;

[0021] Figure 2 is a structural schematic view of the present application for disassembling the primary air pipe;

[0022] Figure 3 is a structural schematic view of the present application for disassembling the center wind pipe;

[0023] In the figure: 1, jacking hydraulic cylinder support; 2, jacking hydraulic cylinder; 3, support frame; 4, telescopic hydraulic cylinder; 5, adjusting support; 6, adjusting support seat; 7, positioning hole; 8, universal wheel; 9, primary air pipe; 10, center wind pipe; 31, screw rod; 32, screw sleeve. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0025] Referring to Figure 1 , a hydraulic disassembly method of a low-nitrogen cyclone burner of a coal-fired boiler, the method comprising the following steps:

[0026] (1) The jacking hydraulic cylinder support, the jacking hydraulic cylinder, the support frame, the telescopic hydraulic cylinder, the adjusting support and the adjusting support seat are detachable, and are assembled on site when used;

[0027] (2) First, the telescopic hydraulic cylinder is placed inside the burner center wind pipe or the primary air pipe; then the adjusting support and the adjustable support seat are installed at the end of the telescopic hydraulic cylinder, and the adjusting support is adjusted to a suitable height according to actual needs;

[0028] (3) the jacking hydraulic cylinder is installed on the other end of the telescopic hydraulic cylinder, that is, the other end of the component to be removed or installed; the jacking hydraulic cylinder support is connected with the jacking hydraulic cylinder through bolts, and the height of the jacking hydraulic cylinder is adjusted to slightly lift the burner central air duct or the primary air duct;

[0029] (4) the jacking hydraulic cylinder support is fixed with the telescopic hydraulic cylinder by two sets of support frames; finally, the telescopic hydraulic cylinder is operated to move forward or backward, so that the burner central air duct or the primary air duct is removed or installed in place.

[0030] A hydraulic dismounting and mounting method for a low-nitrogen cyclone burner of a coal-fired boiler comprises a telescopic hydraulic cylinder 4, a jacking hydraulic cylinder 2, a jacking hydraulic cylinder support 1 and an adjusting frame;

[0031] One end of the telescopic hydraulic cylinder is fixed with the adjusting frame;

[0032] The adjusting frame comprises an adjusting support 5 and an adjusting support seat 6, the adjusting support seat is sleeved on the adjusting support, a plurality of positioning holes 7 are formed in the adjusting support, and the fixing bolts threadedly connected on the adjusting support seat pass through the positioning holes to fix the adjusting support;

[0033] The telescopic hydraulic cylinder is horizontally arranged, the push rod end of the telescopic hydraulic cylinder is fixed with the top of the adjusting support of the adjusting frame through bolts, two fixing bolts are threadedly connected on the adjusting support seat, the fixing bolts can pass through the positioning holes on the adjusting support, and the height of the adjusting frame is adjusted by sliding the adjusting support so that the fixing bolts pass through the positioning holes at different positions;

[0034] The other end of the telescopic hydraulic cylinder is fixed with the push rod of the jacking hydraulic cylinder, and the bottom of the jacking hydraulic cylinder is fixed with the jacking hydraulic cylinder support;

[0035] The cylinder body end of the telescopic hydraulic cylinder is fixed with the push rod end of the jacking hydraulic cylinder through bolts, and the bottom of the cylinder body of the telescopic hydraulic cylinder is fixed with the jacking hydraulic cylinder support;

[0036] The jacking hydraulic cylinder support is connected with the telescopic hydraulic cylinder through the support frame 3.

[0037] The support frame comprises two screw rods 31 and a screw sleeve 32, the two screw rods are threadedly connected at two ends of the screw sleeve respectively, one end of one of the screw rods is hinged with the jacking hydraulic cylinder support, and one end of the other screw rod is hinged with the telescopic hydraulic cylinder.

[0038] The bottom of the jacking hydraulic cylinder support is connected with universal wheels 8.

[0039] Working principle: refer to Figures 2-3The bottom of the jacking hydraulic cylinder support is provided with four universal wheels, and a support frame is arranged for supporting between the jacking hydraulic cylinder support and the telescopic hydraulic cylinder, when the jacking hydraulic cylinder or the telescopic hydraulic cylinder is actuated, the flexible movement of the disassembled parts on the working platform can be realized, the jacking hydraulic cylinder is used for slightly lifting the larger parts such as the burner central air duct and the primary air duct, the telescopic hydraulic cylinder is used for moving and disassembling the burner central air duct and the primary air duct or installing them in place, and the adjusting frame is used for slightly lifting the burner central air duct and the primary air duct together with the jacking hydraulic cylinder, and the height of the support frame can be adjusted according to the height of the working platform and the height of the burner.

Claims

1. A hydraulic disassembly and assembly method for a low-NOx cyclone burner in a coal-fired boiler, characterized by: The method comprises the following steps: (1) The six main components of the lifting hydraulic cylinder support, the lifting hydraulic cylinder, the support frame, the telescopic hydraulic cylinder, the adjusting support and the adjusting support seat are detachable, and are assembled on site when in use; the adjusting frame comprises the adjusting support and the adjusting support seat; (2) First, the telescopic hydraulic cylinder is placed in the central air duct or the primary air duct; then, the adjusting support and the adjusting support seat are installed at the end of the telescopic hydraulic cylinder, and the adjusting frame is adjusted to the appropriate height according to the actual needs; (3) Then, the lifting hydraulic cylinder is installed at the other end of the telescopic hydraulic cylinder, that is, the other end of the component to be removed or installed; next, the lifting hydraulic cylinder support is connected with the lifting hydraulic cylinder through bolts, and the height of the lifting hydraulic cylinder is adjusted to slightly lift the central air duct or the primary air duct of the burner; (4) Next, the lifting hydraulic cylinder support and the telescopic hydraulic cylinder are fixed by two sets of support frames; finally, the telescopic hydraulic cylinder is operated to move forward or backward, so that the central air duct or the primary air duct of the burner is removed or installed in place.

2. The hydraulic disassembly and assembly method for a low-NOx cyclone burner in a coal-fired boiler according to claim 1, characterized in that: One end of the telescopic hydraulic cylinder is fixed with the adjusting frame; the other end of the telescopic hydraulic cylinder is fixed with the push rod of the lifting hydraulic cylinder, and the bottom of the lifting hydraulic cylinder is fixed with the lifting hydraulic cylinder support; the lifting hydraulic cylinder support and the telescopic hydraulic cylinder are connected through the support frame.

3. The hydraulic dismounting method of a low NOx swirl burner for a coal-fired boiler according to claim 2, characterized in that: The adjusting support seat is sleeved on the adjusting support, a plurality of positioning holes are formed in the adjusting support, and the fixing bolts threadedly connected on the adjusting support seat pass through the positioning holes to fix the adjusting support.

4. The hydraulic dismounting method of a low NOx swirl burner for a coal-fired boiler according to claim 3, characterized in that: The support frame comprises two screw rods and a screw sleeve, the two screw rods are threadedly connected at both ends of the screw sleeve respectively, the end of one screw rod is hinged with the lifting hydraulic cylinder support, and the end of the other screw rod is hinged with the telescopic hydraulic cylinder.

5. The hydraulic dismounting method of a low NOx swirl burner for a coal-fired boiler according to claim 4, characterized in that: The bottom of the lifting hydraulic cylinder support is connected with universal wheels.

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