CN113816147A

CN113816147A - Pneumatic ash conveying device and ash cleaning method

Info

Publication number: CN113816147A
Application number: CN202111253104.XA
Authority: CN
Inventors: 徐传香; 强逸; 潘宇峰; 王伟星
Original assignee: Jiangsu Taihu Boiler Co Ltd
Current assignee: Jiangsu Taihu Boiler Co Ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2021-12-21

Abstract

The invention relates to a pneumatic ash conveying device and an ash cleaning method, belonging to the field of boiler structures and comprising an ash hopper, an ash falling pipe, an observation hole, an electric gate valve, a star-shaped electric ash valve and an ash conveying pipe, wherein the ash falling pipe is arranged between the ash hopper and the ash conveying pipe, the observation hole is arranged at the upper part of the ash falling pipe, the electric gate valve is arranged at the middle part of the ash falling pipe, the star-shaped electric ash valve is arranged at the bottom of the ash falling pipe, the ash falling pipe is divided into an inner pipe and an outer pipe, and a vibrator is arranged between the inner pipe and the outer pipe. The structure is simple and clear, convenient operation combines the jam problem of handling the ash falling pipe through manual and electronic multiple mode, prevents the device overall arrangement of deposition in ash falling pipe multiposition multidimension simultaneously, and the ash deposition that falls is placed to the limit, reaches the effect of ideal, has improved work efficiency, can ensure the defeated grey effective operation of strength.

Description

Pneumatic ash conveying device and ash cleaning method

Technical Field

The invention relates to a pneumatic ash conveying device and an ash cleaning method, and belongs to the field of boiler structures.

Background

High-temperature flue gas in the ferrosilicon waste heat boiler project is carried with a large amount of silicon particle dust, and it has great viscidity, needs in time clear away it, clears away the dust after falling and need in time carry away through the timely transport of air force ash conveying system. The existing ash falling hopper structure has a large amount of dust accumulated on the inner walls around the ash falling hopper and the ash pipe, and even can cause blockage phenomenon seriously.

Disclosure of Invention

The invention aims to overcome the defects and provides a pneumatic ash conveying device and an ash cleaning method, which can solve the problems of silicon particle dust accumulation in an ash falling pipe and blockage, and can ensure the effective operation of pneumatic ash conveying by the matching use of a viewing hole, an electric gate valve, a star-shaped electric ash discharge valve, a vibrator and an arc-shaped plate.

According to the technical scheme provided by the invention, the pneumatic ash conveying device comprises an ash hopper, an ash falling pipe, an observation hole, an electric gate valve, a star-shaped electric ash valve and an ash conveying pipe, wherein the ash falling pipe is arranged between the ash hopper and the ash conveying pipe, the observation hole is arranged at the upper part of the ash falling pipe, the electric gate valve is arranged at the middle part of the ash falling pipe, the star-shaped electric ash valve is arranged at the bottom of the ash falling pipe, the ash falling pipe is divided into an inner pipe and an outer pipe, and a vibrator is arranged between the inner pipe and the outer pipe.

As a further improvement of the invention, the inner pipe is also provided with a plurality of lifting lugs, the lifting lugs are provided with arc-shaped plates, and the arc-shaped plates are sleeved on the lifting lugs through sleeves arranged in the middle of the arc-shaped plates.

As a further improvement of the invention, the upper end and the lower end of the arc-shaped plate are respectively provided with a traction wire, and the traction wires respectively penetrate through the inner pipe and the outer pipe and are fixed outside the ash falling pipe.

As a further improvement of the invention, the vibrator comprises a vibration turntable, vibration blades, a vibration spring, vibration steel balls and a vibration support, wherein the vibration support is arranged on the inner pipe, the vibration turntable is arranged on the vibration support, the vibration blades are arranged on the vibration turntable, the vibration blades are connected with the vibration spring, and the vibration steel balls are connected with the vibration spring.

As a further improvement of the invention, an involute bell mouth is arranged between the ash falling pipe and the ash conveying pipe.

As a further improvement of the invention, the electric gate valve adopts the model FDC with the drift diameter of 300 × 300mm, the opening and closing piece contained in the electric gate valve is a gate, and the movement direction of the gate is vertical to the ash falling direction.

As a further improvement of the invention, the star-shaped electric ash discharging valve is fixed at an ash discharging port of the ash discharging pipe, the model is YJD02, the drift diameter is 300 × 300mm, and a bearing and a speed reducer of the star-shaped electric ash discharging valve are both protruded outwards.

A method of ash removal, comprising the steps of:

1) under the working condition of less dust, the vibrator on the outer wall of the inner pipe is started, the flow of the dust is controlled by the electric gate valve, and finally the falling dust is sent to the dust conveying pipe by the star-shaped electric dust discharging valve;

2) when more dust and dust adhesion are strong, the vibrator on the outer wall of the inner pipe normally operates, and the two traction ropes are manually stretched up and down to drive the arc-shaped plate to move.

3) Under the condition that the vibrator and the arc-shaped plate run simultaneously, dust blocks the dust falling pipe, the observation hole is opened to check the blocking position, and the dust falling pipe is dredged.

As a further improvement of the present invention, in step 2), when the two pulling ropes are simultaneously in the open state, the vibrator vibrates and drives the arc-shaped plate to vibrate up and down, and the inner wall and the outer wall of the inner pipe vibrate simultaneously.

The invention has the beneficial effects that:

the structure is simple and clear, convenient operation combines the jam problem of handling the ash falling pipe through manual and electronic multiple mode, prevents the device overall arrangement of deposition in ash falling pipe multiposition multidimension simultaneously, and the ash deposition that falls is placed to the limit, reaches the effect of ideal, has improved work efficiency, can ensure the defeated grey effective operation of strength.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a schematic view of the vibration device of the present invention.

Fig. 4 is a schematic view of an arcuate plate of the present invention.

Description of reference numerals: the device comprises an ash bucket 1, an ash dropping pipe 2, an inner pipe 21, an outer pipe 22, an involute bell mouth 23, an observation hole 3, an electric gate valve 4, a star-shaped electric ash valve 5, an ash conveying pipe 6, a vibrator 7, a vibrating turntable 71, vibrating blades 72, a vibrating spring 73, a vibrating steel ball 74, a vibrating bracket 75, a lifting lug 8, an arc-shaped plate 9 and a sleeve 91.

Detailed Description

The invention will be further described with reference to examples in the drawings to which:

example 1

As shown in the figure, a pneumatic ash conveying device comprises an ash hopper 1, an ash falling pipe 2, an observation hole 3, an electric gate valve 4, a star-shaped electric ash discharging valve 5 and an ash conveying pipe 6, wherein the ash falling pipe 2 is arranged between the ash hopper 1 and the ash conveying pipe 6, the observation hole 3 is arranged on the upper portion of the ash falling pipe 2, the electric gate valve 4 is arranged in the middle of the ash falling pipe 2, the star-shaped electric ash discharging valve 5 is arranged at the bottom of the ash falling pipe 2, the ash falling pipe 2 is divided into an inner pipe 21 and an outer pipe 22, and a vibrator 7 is arranged between the inner pipe 21 and the outer pipe 22.

The vibrator 7 comprises a vibration turntable 71, vibration blades 72, a vibration spring 73, a vibration steel ball 74 and a vibration support 75, the vibration support 75 is installed on the inner tube 21, the vibration turntable 71 is installed on the vibration support 75, the vibration blades 72 are installed on the vibration turntable 71, the vibration spring 73 is connected to the vibration blades 72, the vibration steel ball 74 is connected to the vibration spring 73, the vibrator 7 is an instrument commonly used in the existing engineering, and the inner tube 21 is knocked by high frequency of the vibrator after turning on a point, so that the purpose of preventing dust deposition is achieved.

An opening bell mouth 23 is arranged between the ash falling pipe 2 and the ash conveying pipe 6, so that the ash falling is ensured to fall rapidly, and the star-shaped electric ash valve 5 is prevented from being blocked.

The electric gate valve 4 adopts the model as FDC, the drift diameter is 300mm, the opening and closing part of the electric gate valve 4 is a gate plate, the motion direction of the gate plate is vertical to the ash falling direction, a round opening with the drift diameter is formed in the gate plate, the round opening is driven by a motor to open and close the gate plate, so that the round opening is completely separated from the drift diameter and matched with the drift diameter, the ash falling is automatically discharged, the electric gate valve 4 is used for controlling the flow of the falling ash, the opening and closing action is driven by the motor, the electric gate valve 4 is opened and closed to realize automatic time control, and the material discharge amount can be automatically adjusted.

The star-shaped electric ash valve 5 is arranged at an ash discharge port of the ash discharge pipe 2, the model is YJD02, the drift diameter is 300mm, and a bearing and a speed reducer of the star-shaped electric ash valve 5 are both outwards protruded, so that dust can be prevented from extruding into the bearing. When the pneumatic conveying device works, the speed reducing motor drives the impeller to rotate through the coupling shaft, the dust on the upper part of the shell can be automatically, uniformly and continuously quantitatively conveyed into the ash conveying pipe along with the rotation of the blades, the falling ash can be automatically, uniformly and continuously quantitatively conveyed into the ash conveying pipe 6 along with the rotation of the blades, the relative stability of ash in the pneumatic conveying pipe is ensured, and the pneumatic conveying device can normally work.

A dust cleaning method is suitable for the pneumatic dust conveying device, under the working condition of less dust, when a dust falling pipe starts to convey dust, a vibrator 7 on the outer wall of an inner pipe 21 is started, the pipe wall keeps a continuous vibration state, then the dust flow is controlled through an electric gate valve 4, and finally the falling dust is conveyed into a dust conveying pipe 6 through a star-shaped electric dust discharging valve 5.

Example 2

Still be provided with a plurality of lugs 8 on the inner tube, be provided with the arc 9 on the lug 8, the arc 9 registrates on lug 8 through the sleeve 91 that sets up at its middle part, and the upper and lower both ends of arc 9 all are provided with a pull wire 92, and pull wire 92 pierces through inner tube 21 and outer tube 22 respectively and fixes the outside at ash falling pipe 2, the radian of arc 9 is as little as possible, prevents to form the formation deposition of large-angle boss.

The vibrator 7 comprises a vibration turntable 71, vibration blades 72, a vibration spring 73, a vibration steel ball 74 and a vibration support 75, the vibration support 75 is installed on the inner tube 21, the vibration turntable 71 is installed on the vibration support 75, the vibration blades 72 are installed on the vibration turntable 71, the vibration spring 73 is connected to the vibration blades 72, the vibration steel ball 74 is connected to the vibration spring 73, the vibrator 7 is an instrument commonly used in the existing engineering, and the inner tube 21 is knocked by high frequency of the vibrator after the point is turned on, so that the purpose of preventing dust deposition is achieved.

A dust cleaning method is characterized in that when dust is more and the dust adhesion is strong, dust accumulation piles are easily formed on the upper portions of a dust falling pipe 2 and an electric gate valve 4, a vibrator 7 on the outer wall of an inner pipe 21 normally operates at the moment, two traction ropes 92 are manually stretched up and down to drive an arc-shaped plate 9 to move, the bottom of the arc-shaped plate 9 can scrape the dust accumulation on the top of the electric gate valve 4, the dust accumulation can be shaken off, and the dust accumulation is guided to fall.

In addition, when ash pipe 2 defeated ash, if two haulage ropes 92 are in the open mode simultaneously, vibrator 7 vibration drives arc 9 vibration and inner tube 21 vibration from top to bottom simultaneously this moment, and the inside and outside wall of inner tube 21 vibrates simultaneously, avoids falling the ash more effectively, and this method uses under special operating mode because there is the risk that makes the arc drop owing to the vibration.

Claims

1. The utility model provides a pneumatic ash conveying device, its characterized in that includes ash bucket (1), ash falling pipe (2), observation hole (3), electronic push-pull valve (4), star electric ash valve (5), ash conveying pipe (6) of putting, wherein ash falling pipe (2) set up between ash bucket (1) and ash conveying pipe (6), observation hole (3) set up the upper portion at ash falling pipe (2), electronic push-pull valve (4) set up the middle part at ash falling pipe (2), star electric ash valve (5) of putting set up the bottom at ash falling pipe (2), ash falling pipe (2) divide into inner tube (21) and outer tube (22), be provided with vibrator (7) between inner tube (21) and outer tube (22).

2. A pneumatic ash conveying device according to claim 1, characterized in that the inner pipe (21) is further provided with a plurality of lifting lugs (8), the lifting lugs are provided with arc-shaped plates (9), and the arc-shaped plates (9) are sleeved on the lifting lugs (8) through sleeves (91) arranged in the middle of the arc-shaped plates.

3. A pneumatic ash conveying device according to claim 2, characterized in that the upper and lower ends of the curved plate (9) are provided with a pull wire (92), and the pull wires (92) respectively penetrate through the inner pipe (21) and the outer pipe (22) and are fixed outside the ash falling pipe (2).

4. A pneumatic ash conveying device according to claim 1, characterized in that the vibrator (7) comprises a vibration turntable (71), vibration blades (72), a vibration spring (73), vibration steel balls (74) and a vibration bracket (75), the vibration bracket (75) is mounted on the inner tube (21), the vibration turntable (71) is mounted on the vibration bracket (75), the vibration blades (72) are mounted on the vibration turntable (71), the vibration springs (73) are connected to the vibration blades (72), and the vibration steel balls (74) are connected to the vibration springs (73).

5. A pneumatic ash conveying device according to claim 1, characterized in that an involute bell (23) is arranged between the ash dropping pipe (2) and the ash conveying pipe (6).

6. A pneumatic ash conveying device according to claim 1, characterized in that the electric gate valve (4) is of the type FDC with a diameter 300 x 300, and the opening and closing member comprised by the electric gate valve (4) is a shutter, the movement direction of which is perpendicular to the ash falling direction.

7. A pneumatic ash conveying device according to claim 1, characterized in that the star-shaped electric ash discharge valve (5) is fixed at the ash discharge opening of the ash discharge pipe (2) and is of type YJD02, with a drift diameter of 300 x 300, and the bearing and the speed reducer of the star-shaped electric ash discharge valve (5) are both outwardly convex.

8. The ash removal method is based on the pneumatic ash conveying device and is characterized by comprising the following steps:

1) under the working condition of less dust, the vibrator (7) on the outer wall of the inner pipe (21) is started, the flow of the dust is controlled by the electric gate valve (4), and finally the falling dust is sent to the dust conveying pipe by the star-shaped electric dust valve (5);

2) when more dust and dust adhesion are strong, the vibrator (7) on the outer wall of the inner tube (21) normally operates, and the two traction ropes (92) are manually stretched up and down to drive the arc-shaped plate (9) to move.

3) When the vibrator (7) and the arc-shaped plate (9) run simultaneously, dust blocks the dust falling pipe (2), the observation hole (3) is opened to check the blocking position, and the dust falling pipe (2) is dredged.

9. The ash removal method according to claim 8, wherein in the step 2), when the two pulling ropes (92) are simultaneously in the open state, the vibrator (7) vibrates to simultaneously drive the arc-shaped plate (9) to vibrate up and down, and the inner wall and the outer wall of the inner pipe (21) vibrate simultaneously.