CN202993234U - Automatic rotary furnace ash cleaning device - Google Patents

Abstract

The utility model belongs to the field of energy utilization, and relates to an automatic dust cleaning device for a rotary boiler, which comprises three parts: an air chamber shell, a rotary bottom plate and a brush bundle. The lower end of the side wall of the wind chamber shell is composed of two circular arc segments, and the center of the rotating shaft of the rotary bottom plate passes through the center of the circular arc. The brush filament bundle has a certain degree of elasticity, one end of which is fixed on the rotating plate of the rotary bottom plate, and the other end is in close contact with the arc wall. During the rotation of the rotating shaft, ensure that at least two brush filament bundles on the rotating plates are in contact with the two circular arc walls at any position, so as to achieve the sealing effect and ensure the air supply performance of the air chamber. The ash and slag fall into the rotating plate of the bottom plate of the air chamber through the air supply hole of the grate. After the rotating plate turns over a certain angle, the ash and slag are transferred to the outside of the air chamber, and automatically fall under the action of its own gravity to realize automatic ash cleaning. On the basis of ensuring the air supply performance of the air bin, the utility model realizes automatic dust removal and greatly reduces labor intensity.

Description

Automatic cleaning device for a rotary boiler

technical field

The utility model belongs to the field of energy utilization and relates to an automatic ash cleaning device for a rotary boiler. the

Background technique

At present, most domestic industrial boilers are coal-fired chain boilers. When the coal-fired chain boilers are in normal operation, fine particles such as coal powder and ash will fall into the air bin through the air supply holes of the grate. The accumulation of ash in the air chamber will block the air chamber and cause adverse effects on the air flow of the air chamber, so it needs to be cleaned in time. The usual dust removal method is to make the bottom plate of the air bin into a push-pull movable baffle, and the opening and closing of the ash outlet at the bottom of the air bin can be realized through the horizontal reciprocating movement of the baffle. If the ash accumulated in the chain grate boiler air bin is not cleaned in time, it will affect the air supply performance of the air bin and the normal combustion of coal, resulting in a decrease in the efficiency of the entire boiler. Usually a cleaning operation is required every few hours. Due to frequent cleaning times and heavy equipment, the cleaning operation is labor-intensive. Large-scale is the development trend of boiler equipment. Large-scale boiler equipment is heavier and consumes more coal. Therefore, the dust cleaning workload of the wind bin is very large. In order to reduce labor intensity, it is very urgent to realize the automation of dust removal. The automatic ash cleaner for the boiler furnace exhaust air chamber (application number 200810011973.X) uses hydraulic drive to realize horizontal push-pull reciprocating movement, instead of manual operation to complete ash removal, reducing labor intensity. the

The automatic dust cleaning device needs to comprehensively consider many factors such as the space occupied by the equipment, the cost and reliability of the equipment, and the impact of the dust cleaning method on the air supply of the air bin. In the reciprocating push-pull method, the bottom plate of the air bin must be pulled away when cleaning dust, which will cause air to flow out from the bottom of the air bin, affecting the stability of the air flow inside the air bin and the performance of the air supply. The automatic dust cleaning device adopting horizontal reciprocating motion occupies a large space, the hydraulic device is complicated, and the factors of reliability and cost are the problems that must be considered in its practical application. the

Utility model content

The purpose of this utility model is to provide a rotary boiler automatic dust removal device, which replaces manual dust removal, greatly reduces labor intensity, and at the same time reduces the impact of the dust removal process on the air flow of the air chamber, and occupies a small space. the

The technical scheme of the utility model is as follows:

The utility model relates to an automatic ash removal and transposition of a rotary boiler, which includes a wind chamber shell, a rotary bottom plate, and a brush tow. the

The lower end of the side wall of the air silo shell is provided with two circular arc segments: the lower side wall of the left circular arc segment and the lower side wall of the right circular arc segment; the lower side wall of the left circular arc segment and the lower side wall of the right circular arc segment The minimum distance is greater than twice the length of the rotating plate, driven by the rotating shaft, the rotating plate can rotate in the space formed by the two arc segments and the ash drop opening. the

The rotary bottom plate includes a rotating shaft and a rotating plate, both ends of the rotating shaft are supported by bearings, and the rotating shaft can be connected to the reducer through a transmission device. the

The brush filament bundle is composed of thin metal wires with certain elasticity bound together. One end of the brush filament bundle is fixed on the rotating plate. The brush filament bundle follows the rotation direction of the rotating shaft and forms an oblique angle with the radial direction of the rotating shaft. The angle range is 15°~60°. the

The lower end of the side wall of the air chamber proposed by the utility model is arc-shaped, and during the rotation of the rotating shaft, it can ensure that both sides of the air chamber are in contact with the brush filaments on the rotating plate at each moment. When the side walls of the silo are in contact, elastic contact deformation will occur to ensure the close contact between the rotating plate and the side plates of the air silo to achieve the sealing effect. In this way, no air flows out from the bottom of the air bin, which ensures the air supply performance of the air bin. The ash and slag fall into the rotating plate of the bottom plate of the air chamber through the air supply hole of the grate. After the rotating plate turns over a certain angle, the ash and slag are transferred to the outside of the air chamber and fall automatically under the action of its own gravity. If a large amount of ash falls on the contact between the brush filament bundle and the side wall of the air chamber, the brush filament bundle will automatically produce a large deformation when it is squeezed, so that the ash residue can fall smoothly without jamming the rotating plate, ensuring The normal operation of the automatic dust removal device is ensured. The rotating shaft can be connected to the reducer that drives the grate through the transmission device, no other power equipment is needed, and the transmission ratio can be changed according to the frequency of dust removal, so as to change the speed of the rotating shaft and realize automatic dust removal. the

Description of drawings

Figure 1 is a schematic diagram of the structure of the rotary ash-cleaning grate. the

Fig. 2 is a structural schematic diagram of an automatic ash cleaning device for a rotary boiler. the

Figure 3(a) is a cross-sectional view of the automatic ash removal device for a rotary boiler. the

Figure 3(b) is a structural diagram of the brush filament bundle. the

In the figure: 1 air chamber shell, 2 rotating bottom plate, 3 brush tow, 4 rotating shaft, 5 rotating plate. the

Detailed ways

The rotary boiler ash cleaning device of the utility model is composed of an air chamber shell, a rotary bottom plate and a brush tow. the

The length, width and height of the air silo shell are determined by the tonnage of the boiler and the size of the fire grate, and the width of the ash-falling opening at the lower end of the air silo side wall is 0.8 times to 1 time of the length of the rotating plate 5 . The center of the rotating shaft passes through the center of the arc segment, and the two ends of the rotating shaft are supported by bearings. The rotational speed of the shaft can be determined according to the requirements of the frequency of boiler cleaning. The rotating shaft can be connected to the reducer that drives the grate through appropriate transposition, and the drive can be powered by the reducer, or a separate transmission power can be used. The rotating plates are evenly installed on the rotating shaft. The number of rotating plates is 4 to 9. The number of rotating plates should match the width of the ash-falling opening. When the machining accuracy is relatively high, the number of rotating plates can be increased appropriately. The length of the rotating plate is the same as that of the wind chamber. The width of the gap between the top of the rotating plate and the arc section should be as small as possible, generally not exceeding 1cm, and the length of the brush filament bundle should be 1.05 to 2 times the gap width to ensure that the brush filament bundle is closely connected to the wall surface of the arc section. touch. The diameter of the thin metal wires that make up the brush filament bundle is between 0.05mm and 0.07mm. One end of the brush filament bundle is fixed on the rotating plate and rotates together with the rotating shaft. The direction in which the brush filament bundle rotates along the rotating shaft forms an oblique angle with the radial direction of the rotating shaft, ranging from 15 degrees to 60 degrees. the

Claims (7)

1. a Scotch boiler automatic ash removing device, is characterized in that, this Scotch boiler automatic ash removing device comprises wind storehouse shell (1), rotary plate (2) and brush tow (3);

The side wall lower ends of wind storehouse shell (1) arranges two arc sections: left arc section lower wall and right arc section lower wall; Rotary plate (2) is comprised of rotating shaft (4) and flap (5), and flap (5) is connected in rotating shaft (4), and rotating shaft two ends are by bearings; Brush tow (3) is banded together by elastic metallic yarn and forms, and brush tow one end is fixed on flap (5);

Minimum range between left arc section lower wall and right arc section lower wall is greater than the flap length of twice, and flap (5) can rotate in the space of two arc sections and ash port composition under rotating shaft (4) drives.

2. Scotch boiler automatic ash removing device according to claim 1, is characterized in that, rotating shaft (4) is connected to decelerator by transmission device.

3. boiler automatic ash removing device according to claim 1 and 2, is characterized in that, brush tow (3) becomes 15 ° ~ 60 ° along the direction of rotating shaft (4) rotation with the radial direction of rotating shaft (4).

4. boiler automatic ash removing device according to claim 1 and 2, is characterized in that, described wind ash port width is 0.8 times to 1 times of flap (5) length.

5. boiler automatic ash removing device according to claim 3, is characterized in that, described wind ash port width is 0.8 times to 1 times of flap (5) length.

6. according to claim 1 and 2 or 5 described boiler automatic ash removing devices, is characterized in that, described fine wire diameter at 0.05mm between 0.07mm.

7. boiler automatic ash removing device according to claim 3, is characterized in that, described fine wire diameter at 0.05mm between 0.07mm.

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