Online cleaning system for dust deposition of dust removal fan blade

Abstract

The invention relates to the technical field of dust removal fans, in particular to an on-line cleaning system for dust deposition of blades of a dust removal fan, which comprises a flushing system and a drainage system, the flushing system comprises a connecting sleeve welded at a hole in the bottom of an inlet pipe of the fan, and the upper end of the connecting sleeve is welded with a second double-thread short pipe; the upper end of the second double-thread short pipe is fixedly connected with an elbow, a first double-thread short pipe is welded to the position, facing a fan impeller, of the elbow, one end of the first double-thread short pipe is fixedly provided with a linear nozzle through another connecting sleeve, and a third double-thread short pipe is fixedly installed below the connecting sleeve. A ball valve is fixedly installed at the lower end of the third double-thread short pipe, the fan impeller is cleaned through the first double-thread short pipe, the second double-thread short pipe and the linear nozzle connected with the second double-thread short pipe, and meanwhile waste water is discharged through the drainage system.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal fans, and particularly to an on-line cleaning system for ash accumulation on the blades of a dust removal fan. Background Art

[0002] The dust removal fan in the metallurgical steel industry is a general-purpose equipment. Affected by the dust removal working conditions, the problem of rotor imbalance caused by ash accumulation on the fan blades restricts the normal operation of the main equipment of the enterprise. Especially in the wet dust removal working condition, the problem of rotor imbalance caused by ash accumulation on the fan blades leading to fan vibration faults is particularly serious. The traditional treatment method is to stop the system to clean the ash, but after running for a period of time, the problem of rotor imbalance will reappear, affecting the continuous operation of the main equipment. The technology of the present invention is an on-line cleaning system for ash accumulation on the blades of a dust removal fan, which can effectively prevent fan vibration faults caused by ash accumulation on the fan blades. Summary of the Invention

[0003] The purpose of the present invention is to provide an on-line cleaning system for ash accumulation on the blades of a dust removal fan to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: An on-line cleaning system for ash accumulation on the blades of a dust removal fan includes a flushing system and a drainage system. The flushing system includes a connecting sleeve welded to the bottom opening of the fan inlet pipe. The upper end of the connecting sleeve is welded with a second double-headed threaded short pipe. The upper end of the second double-headed threaded short pipe is fixedly connected with an elbow. The elbow is welded with a first double-headed threaded short pipe towards the fan impeller. One end of the first double-headed threaded short pipe is fixedly installed with a linear nozzle through another connecting sleeve. A third double-headed threaded short pipe is fixedly installed below the connecting sleeve, and a ball valve is fixedly installed at the lower end of the third double-headed threaded short pipe.

[0005] Among them, a drainage system is provided at the bottom opening of the fan housing. The drainage system includes a three-way flange pipe fixedly connected to the bottom opening of the fan housing. An inspection valve is fixedly installed on the three-way flange pipe. A control valve is fixedly installed at the lower end of the three-way flange pipe. The lower end of the control valve is fixedly connected with a flange pipe. The lower end of the flange pipe is welded with a water seal assembly. A reduced-diameter water connecting pipe is provided at the bottom of one end of the water seal assembly.

[0006] The water seal assembly is S-shaped. Stains can be deposited at the lowest part of the water seal assembly, and a dredging manhole is provided at the bottom of the lowest part of the water seal assembly.

[0007] The linear nozzle and the fan impeller are axially arranged.

[0008] Compared with the prior art, the beneficial effects of the present invention are: The fan impeller is cleaned through the first double-headed threaded short pipe, the second double-headed threaded short pipe, and the linear nozzle connected to the second double-headed threaded short pipe, and at the same time, the waste water is discharged by the drainage system; specifically: 1. The present invention can effectively solve the problem of rotor imbalance caused by blade ash accumulation and effectively reduce the vibration fault of the fan; 2. The present invention can realize the function of cleaning blade ash accumulation under the condition that the dust removal fan does not stop; 3. The present invention can realize the function of automatically discharging the cleaning material under the condition that the flue gas medium does not overflow; 4. The present invention has the characteristics of simple structure, low manufacturing and installation cost, and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic structural diagram of the water spraying system in the present invention; Figure 2 It is a schematic structural diagram of the drainage system in the present invention; Figure 3 It is a schematic structural diagram of the linear nozzle in the present invention; Figure 4 It is a schematic diagram of the working principle of the linear nozzle in the present invention.

[0010] The corresponding relationship between the labels in the drawings and the component names is as follows: 1. Flushing system; 101. Linear nozzle; 102. First double-headed threaded short pipe; 103. Fixed plate; 104. Elbow; 105. Second double-headed threaded short pipe; 106. Connecting sleeve; 107. Third double-headed threaded short pipe; 108. Ball valve; 2. Drainage system; 201. Three-way flange pipe; 202. Flange pipe; 203. Water seal assembly; 204. Unblocking manhole; 205. Control valve; 206. Check valve; 207. Reducing water connecting pipe; DETAILED DESCRIPTION OF THE INVENTION

[0011] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0012] Refer to Figure 1 , Figure 1It is a schematic structural diagram of the flushing system 1. The flushing system 1 includes a fixed plate 103 welded to the bottom of the air inlet pipe. Inside the fixed plate 103, a first double-headed threaded short pipe 102 is fixedly installed. The first double-headed threaded short pipe 102 penetrates through the fixed plate 103 and extends to both sides. Near one end of the first double-headed threaded short pipe 102 close to the fan impeller, a connecting sleeve 106 and a linear nozzle 101 (there are two connecting sleeves 106) are fixedly installed in sequence. The linear nozzle 101 is connected to the first double-headed threaded short pipe 102 through the welding of the connecting sleeve 106. An elbow 104 is provided at one end of the first double-headed threaded short pipe 102 far from the fan impeller.

[0013] As Figure 1 shown, a connecting sleeve 106 is welded at the opening at the bottom of the fan impeller. Inside the connecting sleeve 106, a second double-headed threaded short pipe 105 is fixedly installed. The second double-headed threaded short pipe 105 penetrates through the inside of the connecting sleeve 106 and extends upward to be hermetically connected to the elbow 104. A third double-headed threaded short pipe 107 is fixedly installed downward on the second double-headed threaded short pipe 105. The third double-headed threaded short pipe 107 is connected to the second double-headed threaded short pipe 105 through the welding of the connecting sleeve 106. A ball valve 108 is fixedly installed at the lower end of the third double-headed threaded short pipe 107 (as Figure 3 shown).

[0014] Specific implementation method: When the ball valve 108 is connected to the water source of the site, open the ball valve 108, and water flows into the inside of the third double-headed threaded short pipe 107 through the external water pressure. Since a set of connecting sleeves 106 connect the first double-headed threaded short pipe 102, the second double-headed threaded short pipe 105, and the third double-headed threaded short pipe 107 to form a whole, and at the same time the first double-headed threaded short pipe 102 is connected to the linear nozzle 101 through the connecting sleeve 106. When the water reaches the linear nozzle 101, it sprays out. The water stains sprayed by the linear nozzle 101 are used for on-line cleaning of the ash accumulation on the dust removal fan blades. Since the linear nozzle 101 sprays non-contact with the fan impeller, the fan impeller can still be cleaned when it is rotating.

[0015] As Figure 4 shown, the working principle of the linear nozzle is as follows: The linear nozzle 101 is fixed, and the spraying direction is vertically downward. The fan rotor rotates in the υ direction, and it will realize the full-area alternating cleaning of each of the 12 fan blades arranged in a ring.

[0016] As Figures 2 to 3As shown in the figure, a drainage system 2 is provided at the opening at the bottom of the fan casing. The drainage system 2 includes a tee flange pipe 201 fixedly installed at the opening at the bottom of the fan casing. A check valve 206 is fixedly installed below the tee flange pipe 201, and a control valve 205 is fixedly installed below the check valve 206. A flange pipe 202 is fixedly connected to the tee flange pipe 201 at the position of the control valve. The lower end of the flange pipe 202 is welded with a water seal assembly 203. The water seal assembly 203 is S-shaped. A dredging manhole 204 is provided at the eccentric position of the water seal assembly 203 close to the flange pipe 202. A reducing connecting water pipe 207 is fixedly installed on the sewer at the lower end of the water seal assembly 302.

[0017] In the specific implementation manner, after the control valve 205 on the tee flange pipe 201 is opened and the check valve 206 is closed, the wastewater for cleaning the fan impeller flows into the tee flange pipe 201 welded to the bottom of the fan bottom shell, and then enters the interior of the flange pipe 202 at the lower end of the tee flange pipe 201 through the control valve 205. The sewage continues to flow downward into the interior of the water seal assembly 203. Since the water seal assembly 203 is S-shaped, the sewage will first reach the first bend. As the accumulated drainage volume increases, an overflow will form at its outlet. At this time, the water flow direction is from bottom to top, and the stains in the wastewater will be deposited at the bottom of the water seal assembly 203. The wastewater flows into the sewer through the reducing connecting water pipe 207. When it is necessary to clean the stains at the bottom of the water seal assembly 203, the control valve 205 on the tee flange pipe 201 is closed. At the same time, an external pipe is connected to the check valve 206 on the tee flange pipe 201, and the check valve 206 is opened. At this time, the wastewater flows out from the check valve 206. Then, the dredging manhole 204 on the water seal assembly 203 is opened to clean the stains inside the water seal assembly 203.

[0018] It should be noted that the dredging manhole 204 is a combination key, and its detailed structure has been disclosed in the published patent (Chinese invention patent, titled: A Pipe Inspection Manhole, application number: ZL202223009068.5). The function and structure of the dredging manhole 204 in this application are the same as those in the published patent, so no detailed description will be given here.

[0019] Working principle: When the ball valve 108 is connected to the water source, water is pushed forward by the external water source and reaches the linear nozzle 101 through the third double-headed threaded short pipe 107, the second double-headed threaded short pipe 105, and the first double-headed threaded short pipe 102. The water stain is sprayed onto the fan impeller, and the cleaned sewage flows into the three-way flange pipe 201 at the opening at the bottom of the fan housing and enters the inside of the water seal assembly 203. The S-shaped design of the water seal assembly 203 can deposit the stains at the lowest part of the water seal assembly 203. Water flows from the other end of the water seal assembly 203 into the reducing water connecting pipe 207. When it is necessary to clean the stains at the bottom of the water seal assembly 203, close the control valve 205, connect the external pipe to the check valve 206 at the same time, and open the check valve 206. At this time, the waste water flows out from the check valve 206. Open the dredging hand hole 204 on the water seal assembly 203 and clean the stains inside the water seal assembly 203.

Claims

1. An online cleaning system for removing dust accumulation on the blades of a dust removal fan, comprising a flushing system (1) and a drainage system (2), characterized in that, The flushing system (1) includes a connecting sleeve (106) welded to the opening at the bottom of the fan inlet pipe. A second double-headed threaded short pipe (105) is welded to the upper end of the connecting sleeve (106). The upper end of the second double-headed threaded short pipe (105) is fixedly connected to an elbow (104). The elbow (104) is welded with a first double-headed threaded short pipe (102) towards the fan impeller. One end of the first double-headed threaded short pipe (102) is fixedly installed with a linear nozzle (101) through another connecting sleeve (106). A third double-headed threaded short pipe (107) is fixedly installed below the connecting sleeve (106), and a ball valve (108) is fixedly installed at the lower end of the third double-headed threaded short pipe (107).

2. The on-line cleaning system for dust accumulation on the blades of a dust removal fan according to claim 1, wherein, A drainage system (2) is provided at the opening at the bottom of the fan housing. The drainage system (2) includes a three-way flange pipe (201) fixedly connected to the opening at the bottom of the fan housing. An inspection valve (206) is fixedly installed on the three-way flange pipe (201). A control valve (205) is fixedly installed at the lower end of the three-way flange pipe (201). The lower end of the control valve (205) is fixedly connected to a flange pipe (202). A water seal assembly (203) is welded to the lower end of the flange pipe (202). A reduced-diameter water connection pipe (207) is provided at the bottom of one end of the water seal assembly (203).

3. The on-line cleaning system for removing dust accumulation on the blades of a dust removal fan according to claim 2, characterized in that, The water seal assembly (203) is S-shaped. Stains can be deposited at the lowest part of the water seal assembly (203), and a dredging manhole (204) is provided at the lowest part of the water seal assembly (203).

4. An on-line cleaning system for removing dust accumulation on the blades of a dust removal fan according to claim 1, characterized in that, The linear nozzle (101) is axially arranged with the fan impeller.

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