Ash removal device for boiler air bellow

Abstract

The invention relates to an ash removal device, in particular to an ash removal device for a boiler air bellow. The problem that in the prior art, coal ash in a boiler air bellow is not easy to clean is solved. The device comprises the ash discharging pipe, the ash hopper, the first ash falling pipe, the second ash falling pipe, the coke beating pipe and the coke beating rod, the ash hopper is installed at the bottom of the boiler air bellow, coal ash in the boiler air bellow can be conveniently discharged in a concentrated mode, the concentrated coal ash falls into the ash discharging pipe through the ash falling pipes and finally flows into a hearth from the ash discharging pipe, the coal ash does not need to be manually removed in the whole ash removing process, and the cost is reduced. Time and labor are saved. And the device is good in sealing performance and suitable for pulverized coal boilers with tangential corners, front and back wall hedging and the like, and ash removal operation can be carried out no matter the boilers are in a running state or a shutdown state. The invention belongs to the technical field of boiler air bellow ash removal.

Description

Technical Field

[0001] The invention relates to a ash removal device, in particular to a ash removal device for a boiler bellows, and belongs to the technical field of ash removal of boiler bellows. Background Art

[0002] When the pulverized coal boiler is in operation, part of the ash produced by the combustion of pulverized coal falls into the slag removal device at the bottom of the furnace, and the other part flows through the air preheater with the flue gas and enters the dust removal device to be collected. As the flue gas and secondary air flow alternately through the heat storage element of the rotary air preheater, and as the sealing effect deteriorates, the ash in the flue gas will enter the secondary air, flow through the air duct and bellows with the secondary air, and finally enter the furnace through the burner.

[0003] However, due to the dead corners of the bellows, a portion of the coal ash will be deposited in the bellows and become thicker and thicker. For some opposed boilers, the coal ash deposition is even higher than the burner center line, seriously affecting the burner air distribution and coal powder combustion effect. Moreover, the coal ash cannot be cleaned when the boiler is running. When the boiler is shut down, it can only be manually bagged and transported out of the bellows. The bellows accumulates a large amount of ash, and cleaning is time-consuming and labor-intensive.

[0004] In summary, how to propose a dust removal device to address the above technical issues has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a dust removal device for a boiler wind box.

[0006] The technical solution of the present invention is: an ash removal device for a boiler wind box, comprising an ash discharge pipe, an ash hopper, a first ash drop pipe, a second ash drop pipe, a coke removal pipe and a coke removal rod.

[0007] The ash hopper is installed at the bottom of the boiler wind box.

[0008] The first ash dropping pipe and the second ash dropping pipe are both arranged perpendicular to the horizontal plane, the coke removing pipe is arranged parallel to the horizontal plane, and the angle between the ash discharge pipe and the horizontal plane is β.

[0009] The first ash dropping pipe is communicated with the ash hopper, and a gate door is installed on the first ash dropping pipe.

[0010] One end of the second ash falling pipe is connected to the first ash falling pipe through a compensator, and the other end of the second ash falling pipe is connected to the ash discharge pipe.

[0011] One end of the ash discharge pipe passes through the water-cooled wall and is connected to the furnace, and the other end of the ash discharge pipe is equipped with an observation window.

[0012] The coke beating pipe is connected with the ash discharging pipe, and the coke beating rod is inserted in the coke beating pipe.

[0013] Compared with the prior art, the present invention has the following effects:

[0014] 1. The present invention has a simple structure and is convenient for ash removal. The ash hopper 2 is installed at the bottom of the boiler bellows, which is convenient for the centralized discharge of the coal ash in the boiler bellows. The concentrated coal ash falls into the ash discharge pipe 1 through the ash drop pipe, and finally flows into the furnace from the ash discharge pipe 1. The entire ash removal process does not require manual removal of coal ash, which saves time and effort.

[0015] 2. The present invention has good sealing performance and is suitable for pulverized coal boilers with four-corner rounding and front and rear wall hedging. Whether the boiler is in operation or shutdown, ash removal operation can be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] In the figure: 1. ash discharge pipe; 2. ash hopper; 3. gate door; 4-1. first ash drop pipe; 4-2. second ash drop pipe; 5. compensator; 6. coke removal pipe; 7. coke removal rod; 8. water-cooled wall sealing sleeve; 9. observation window. DETAILED DESCRIPTION

[0018] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] Specific implementation method 1: Combination Figure 1 The present embodiment is described. A ash removal device for a boiler wind box of the present embodiment includes an ash discharge pipe 1, an ash hopper 2, a first ash drop pipe 4-1, a second ash drop pipe 4-2, a coke removal pipe 6 and a coke removal rod 7.

[0020] The ash hopper 2 is installed at the bottom of the boiler wind box. Such an arrangement is conducive to the centralized discharge of the coal ash in the boiler wind box.

[0021] The first ash dropping pipe 4-1 and the second ash dropping pipe 4-2 are arranged perpendicular to the horizontal plane, the coke removing pipe 6 is arranged parallel to the horizontal plane, and the angle between the ash discharge pipe 1 and the horizontal plane is β.

[0022] The first ash dropping pipe 4 - 1 is connected to the ash hopper 2 , and a gate door 3 is installed on the first ash dropping pipe 4 - 1 .

[0023] One end of the second ash falling pipe 4 - 2 is connected to the first ash falling pipe 4 - 1 through the compensator 5 , and the other end of the second ash falling pipe 4 - 2 is connected to the ash discharge pipe 1 .

[0024] One end of the ash discharge pipe 1 passes through the water-cooled wall and is connected to the furnace. An observation window 9 is installed at the other end of the ash discharge pipe 1. This arrangement makes it easy to observe the ash discharge state and coking condition in the ash discharge pipe 1.

[0025] The coke removing pipe 6 is connected with the ash discharging pipe 1, and the coke removing rod 7 is inserted in the coke removing pipe 6. Such an arrangement can clean the ash discharging pipe 1, avoid coking at the outlet of the ash discharging pipe 1, and prevent blockage.

[0026] Specific implementation method 2: Combination Figure 1 To explain this embodiment, the compensator 5 in this embodiment is a corrugated compensator, which is arranged in this way to absorb the thermal expansion between the ash discharge pipe 1 and the boiler wind box. Other components and connection relationships are the same as those in the first embodiment.

[0027] Specific implementation method three: Combination Figure 1 To explain this embodiment, this embodiment further comprises a water-cooled wall sealing sleeve 8, one end of the water-cooled wall sealing sleeve 8 is sleeved on the ash discharge pipe 1, and the other end of the water-cooled wall sealing sleeve 8 is fixedly connected to the water-cooled wall.

[0028] Such arrangement, on the one hand, strengthens the fixation of the ash discharge pipe 1, and on the other hand, plays a sealing role to prevent the coal ash from leaking out.

[0029] Other components and connection relationships are the same as those in the first or second specific implementation.

[0030] Specific implementation method four: Combination Figure 1 To illustrate this embodiment, the angle β between the ash discharge pipe 1 and the horizontal plane is 10° to 20°, which facilitates the coal ash in the ash discharge pipe 1 to slide into the furnace. Other components and connection relationships are the same as those of the first, second or third embodiments.

[0031] Specific implementation method five: Combination Figure 1 To explain this embodiment, the first ash dropping pipe 4-1, the second ash dropping pipe 4-2 and the ash discharge pipe 1 have the same diameter, and the diameter of the coke removal pipe 6 is smaller than that of the ash discharge pipe 1. Other components and connection relationships are the same as those of the first, second, third or fourth embodiments.

[0032] How it works

[0033] When removing ash, first observe through the observation window 9 whether there is coking or blockage at the outlet of the ash discharge pipe 1, and deal with the coking and blockage problems by reciprocatingly pulling the coking rod 7.

[0034] Then open the gate door 3, and the coal ash flows into the furnace through the first ash falling pipe 4-1, the second ash falling pipe 4-2 and the ash discharge pipe 1 under its own gravity and the pressure difference between the boiler wind box and the furnace, and then falls into the furnace bottom slag removal device or is captured by the dust removal device.

[0035] Finally, after observing through the observation window 9 that the coal ash is completely removed, the gate door 3 is closed and the ash removal operation is completed. The entire ash removal process does not require manual removal of coal ash, saving time and effort.

[0036] The present invention has been disclosed as above in the form of a preferred embodiment, but it is not intended to limit the present invention. Any simple modification, equivalent changes and modifications made to the above implementation cases by any professional and technical personnel who do not deviate from the content of the technical solution of the present invention and based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A ash removal device for a boiler wind box, characterized in that: It comprises an ash discharge pipe (1), an ash hopper (2), a first ash drop pipe (4-1), a second ash drop pipe (4-2), a coke removal pipe (6) and a coke removal rod (7); The ash hopper (2) is installed at the bottom of the boiler wind box; The first ash dropping pipe (4-1) and the second ash dropping pipe (4-2) are both arranged perpendicular to the horizontal plane, the coke removing pipe (6) is arranged parallel to the horizontal plane, and the angle between the ash discharge pipe (1) and the horizontal plane is β; The first ash dropping pipe (4-1) is connected to the ash hopper (2), and a gate door (3) is installed on the first ash dropping pipe (4-1); One end of the second ash falling pipe (4-2) is connected to the first ash falling pipe (4-1) through a compensator (5), and the other end of the second ash falling pipe (4-2) is connected to the ash discharge pipe (1); One end of the ash discharge pipe (1) passes through the water-cooled wall and is connected to the furnace, and the other end of the ash discharge pipe (1) is provided with an observation window (9); The de-coking pipe (6) is communicated with the ash discharging pipe (1), and the de-coking rod (7) is inserted into the de-coking pipe (6).

2. The ash removal device for a boiler wind box according to claim 1, characterized in that: The compensator (5) is a corrugated compensator.

3. The ash removal device for a boiler wind box according to claim 2, characterized in that: It also includes a water-cooled wall sealing sleeve (8), one end of which is sleeved on the ash discharge pipe (1), and the other end of which is fixedly connected to the water-cooled wall.

4. The ash removal device for a boiler wind box according to claim 3 is characterized in that: The angle β between the ash discharge pipe (1) and the horizontal plane is 10° to 20°.

5. The ash removal device for a boiler wind box according to claim 4, characterized in that: The first ash dropping pipe (4-1), the second ash dropping pipe (4-2) and the ash discharge pipe (1) have the same diameter, and the diameter of the coke removal pipe (6) is smaller than the diameter of the ash discharge pipe (1).

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