Soot blower of circulating fluidized bed boiler

Abstract

The utility model discloses a soot blower of a circulating fluidized bed boiler, which comprises a shell, a pressure regulating disc is arranged in the shell, a locking screw plug is arranged on one side of the pressure regulating disc, a pressure gauge is arranged on one side of the shell, a connecting pipe is arranged on one side of the pressure gauge, and a connecting pipe is arranged on the other side of the connecting pipe. One end of the connecting pipe is provided with a connecting assembly used for being connected with the shell, one side of the shell is provided with a circular groove used for allowing the connecting pipe to penetrate through, the other end of the connecting pipe is connected with a three-head pipe in a penetrating mode, and one end of the three-head pipe is connected with one end of a pressure gauge in a penetrating mode; by means of the design of the shell, the pressure regulating disc, the pressure gauge and the air valve, the pressure of the tail shaft soot blower is detected and correspondingly adjusted through the pressure gauge, on the premise that the soot blowing effect is not affected, the steam blowing damage problem of the heating surface is greatly relieved, and the steam soot blowing parameter angle is adjusted, and the heating surface blowing damage problem is solved.

Description

Technical Field

[0001] The utility model relates to the field of boiler cleaning devices, in particular to a soot blower of a circulating fluidized bed boiler. Background Art

[0002] During the use of the boiler tail shaft sootblower, the tail shaft sootblower blows compressed gas to the heating surface. Due to the long-term blowing of the compressed gas from the sootblower, the heating surface tube row will be damaged, causing the second row of tubes on the heating surface to have varying degrees of wear. Therefore, in the long run, it will lead to the risk of leakage on the heating surface. Utility Model Content

[0003] The utility model aims to provide a soot blower for a circulating fluidized bed boiler to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sootblower for a circulating fluidized bed boiler, comprising a shell, a pressure regulating disk for adjusting the air pressure is arranged inside the shell, a locking screw for locking the pressure regulating disk is arranged on one side of the pressure regulating disk, a pressure gauge for detecting the air pressure inside the shell is arranged on one side of the shell, a connecting pipe for connecting the shell and the pressure gauge is arranged on one side of the pressure gauge, and a connecting assembly for connecting to the shell is arranged at one end of the connecting pipe.

[0005] Preferably, a circular groove for inserting a connecting pipe is opened on one side of the shell, and the other end of the connecting pipe is connected with a three-pronged pipe, and one end of the three-pronged pipe is connected with one end of the pressure gauge.

[0006] Preferably, the top end of the three-pronged pipe is connected through an air valve.

[0007] Preferably, the connecting assembly includes a mounting member and a locking member, the mounting member includes a mounting block, the mounting block is sleeved on the outer wall of one end of the connecting pipe, a groove is opened on one side of the mounting block, and a sealing gasket for sealing is fixedly connected to the inner wall of the groove.

[0008] Preferably, the locking member includes symmetrically arranged card blocks, the top and bottom ends of the inner wall of the groove are respectively provided with locking holes for inserting and connecting the card blocks, one end of the card block is provided with a fixing block for placing the card block, and the fixing block is fixedly connected to one side of the shell.

[0009] Preferably, a cavity is provided inside the fixed block, an insertion hole is provided at one end of the inner wall of the cavity, the insertion hole is interlacedly connected with the card block, a baffle is fixedly connected to one end of the card block, and a pushing spring is fixedly connected to one end of the baffle.

[0010] Technical effects and advantages of the utility model:

[0011] The utility model utilizes the design of a shell, a pressure regulating plate, a pressure gauge and an air valve, and detects the pressure of the tail shaft soot blower through the pressure gauge and makes corresponding adjustments. This can greatly reduce the problem of steam blowing damage to the heating surface without affecting the soot blowing effect, and solve the problem of steam blowing damage to the heating surface from the perspective of adjusting the steam soot blowing parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model.

[0013] Figure 2 For this utility model Figure 1 A is a schematic diagram of the enlarged structure.

[0014] In the figure: 1. Shell; 2. Pressure regulating plate; 3. Locking screw plug; 4. Three-pronged pipe; 5. Connecting pipe; 6. Pressure gauge; 7. Air valve; 8. Fixing block; 9. Mounting block; 10. Sealing gasket; 11. Block; 12. Baffle; 13. Push spring. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] The utility model provides Figure 1-2 A sootblower for a circulating fluidized bed boiler shown in the figure comprises a shell 1, a pressure regulating disk 2 for regulating air pressure is arranged inside the shell 1, a locking screw 3 for locking the pressure regulating disk 2 is arranged on one side of the pressure regulating disk 2, a pressure gauge 6 for detecting the air pressure inside the shell 1 is arranged on one side of the shell 1, a connecting pipe 5 for connecting the shell 1 and the pressure gauge 6 is arranged on one side of the pressure gauge 6, and a connecting assembly for connecting to the shell 1 is arranged at one end of the connecting pipe 5.

[0017] Specifically, the working principle of the shell 1, the pressure regulating disk 2 and the locking screw plug 3 is the same as the working principle of a boiler soot blower valve body with announcement number CN207195698U. The pressure is adjusted by rotating the pressure regulating disk 2, and the locking screw plug 3 limits the position of the pressure regulating disk 2.

[0018] Specifically, a circular groove for inserting a connecting pipe 5 is provided on one side of the shell 1, and a three-head pipe 4 is connected to the other end of the connecting pipe 5, and one end of the three-head pipe 4 is connected to one end of a pressure gauge 6, and an air valve 7 is connected to the top of the three-head pipe 4. The connecting assembly includes a mounting member and a locking member. The mounting member includes a mounting block 9, and the mounting block 9 is sleeved on the outer wall of one end of the connecting pipe 5. A groove is provided on one side of the mounting block 9, and a sealing gasket 10 for sealing is fixedly connected to the inner wall of the groove. The locking member includes a symmetrically arranged card block 11, and locking holes for inserting and connecting the card block 11 are respectively provided on the top and bottom ends of the inner wall of the groove. A fixing block 8 for placing the card block 11 is provided at one end of the card block 11, and the fixing block 8 is fixedly connected to one side of the shell 1, and a cavity is provided inside the fixing block 8, and an insertion hole is provided at one end of the inner wall of the cavity, and the insertion hole is inserted and connected to the card block 11, and a baffle 12 is fixedly connected to one end of the card block 11, and a pushing spring 13 is fixedly connected to one end of the baffle 12.

[0019] Furthermore, the three-head pipe 4 is a three-way pipe, which is connected with the shell 1, the air valve 7 and the pressure gauge 6 through the connecting pipe 5 respectively. The fixed block 8 is an annular plate, and the locking pieces are symmetrically arranged at the top and bottom of the fixed block 8. The sizes of the locking hole and the insertion hole are the same, both of which are 1.1 times the size of the block 11. The size of the baffle 12 is 1.1 times the size of the insertion hole. The pushing spring 13 and the baffle 12 are both arranged in the cavity, and the pushing spring 13 is always in a compressed state in the cavity. When it is necessary to disassemble the connecting pipe 5 and the shell 1, the two blocks 11 are pressed toward each other through the circular groove of the shell 1, and the fixed block 8 is inserted into the groove of the mounting block 9. When the block 11 moves to the locking hole position, the restoring force of the pushing spring 13 pushes the baffle 12 to drive the block 11 to be inserted into the locking hole, thereby completing the locking of the mounting block 9 and the fixed block 8. Therefore, the fixed block 8 and the mounting block 9 work together to extrude and deform the sealing gasket 10, thereby realizing the isolation of the gap between the shell 1 and the fixed block 8 from the outside.

[0020] It should be noted that the installation of pressure gauge 6 is used to customize the sootblowing pressure of the sootblower according to the different distances between the sootblowing gun tube and the heating surface, so as to minimize the blowing damage to the heating surface while ensuring the sootblowing effect. The sootblowing pressure of the boiler shaft heating surface sootblower is customized according to the distance to the heating surface through the pressure before the sootblower lifting valve. The anti-wear treatment of the heating surface is sought from the perspective of adjusting the steam sootblowing parameters. The sootblowing pressure of different sootblower is customized and set. For sootblower with a heating surface close to the sootblowing gun tube, For sootblowers with a distance ratio far from the heating surface to the sootblower gun, the sootblowing pressure shall be appropriately increased according to the distance ratio, but the maximum set pressure of the sootblower shall be used as the upper limit, which shall not exceed 1.0MPa in principle. The tail shaft shall be four levels lower as the reference standard (the steam sootblowing pressure is 0.8MPa, and the closest distance between the sootblower gun barrel and the tube row is 700mm). The sootblower pressure in different areas shall be adjusted in direct proportion to the distance between different gun barrels and the nearest tube row of the heating surface. The formula is as follows:

[0021] (1);

[0022] The practical working steps of the present invention are as follows: 1. Collect the initial data of the sootblower before adjustment (the distance between the heating surface and the gun barrel, the material of the heating surface, and the wall thickness), connect the pressure gauge 6 to the sootblower lifting valve (the range of the pressure gauge 6 is 0-2MPa) to measure the existing sootblowing pressure of the sootblower; 2. Combine the operation status of the unit and the dust condition of the heating surface (check that there is no dust accumulation on the heating surface, and there is margin for adjusting the sootblowing pressure of the sootblower); according to the existing sootblowing pressure of the sootblower and the different distances between the gun barrel of the sootblower and the heating surface, set the corresponding sootblowing pressure in proportion; 3. After the air inlet valve of the sootblower is closed, connect one side to the pressure gauge 6, and loosen the locking screw 3 on the other side to adjust the pressure regulating disk 2 (to increase the pressure, turn the pressure regulating disk 2 counterclockwise, to reduce the pressure, turn the pressure regulating disk 2 clockwise); after adjusting the pressure, ensure that the pin head of the locking screw 3 is inserted in the groove of the pressure regulating disk 2, install the locking screw 3, and start the sootblower again to obtain the pressure reading effect.

[0023] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sootblower for a circulating fluidized bed boiler, comprising a shell (1), a pressure regulating disk (2) for regulating air pressure being arranged inside the shell (1), a locking screw plug (3) for locking the pressure regulating disk (2) being arranged on one side of the pressure regulating disk (2), characterized in that: A pressure gauge (6) for detecting the internal air pressure of the shell (1) is provided on one side of the shell (1), a connecting pipe (5) for connecting the shell (1) and the pressure gauge (6) is provided on one side of the pressure gauge (6), and a connecting assembly for connecting to the shell (1) is provided at one end of the connecting pipe (5).

2. A soot blower for a circulating fluidized bed boiler according to claim 1, characterized in that: A circular groove for inserting a connecting pipe (5) is provided on one side of the shell (1); the other end of the connecting pipe (5) is connected to a three-pronged pipe (4); and one end of the three-pronged pipe (4) is connected to one end of a pressure gauge (6).

3. A soot blower for a circulating fluidized bed boiler according to claim 2, characterized in that: The top end of the three-head pipe (4) is connected through an air valve (7).

4. The soot blower for a circulating fluidized bed boiler according to claim 1, characterized in that: The connection assembly comprises a mounting member and a locking member, wherein the mounting member comprises a mounting block (9), wherein the mounting block (9) is sleeved on the outer wall of one end of the connecting pipe (5), wherein a groove is formed on one side of the mounting block (9), and a sealing gasket (10) for sealing is fixedly connected to the inner wall of the groove.

5. A soot blower for a circulating fluidized bed boiler according to claim 4, characterized in that: The locking member comprises symmetrically arranged card blocks (11), the top and bottom ends of the inner wall of the groove are respectively provided with locking holes for inserting and connecting the card blocks (11), one end of the card block (11) is provided with a fixing block (8) for placing the card block (11), and the fixing block (8) is fixedly connected to one side of the housing (1).

6. A soot blower for a circulating fluidized bed boiler according to claim 5, characterized in that: A cavity is provided inside the fixed block (8), an insertion hole is provided at one end of the inner wall of the cavity, the insertion hole is inserted and connected with the clamping block (11), one end of the clamping block (11) is fixedly connected to a baffle (12), and one end of the baffle (12) is fixedly connected to a pushing spring (13).

Images