CN111530647B

CN111530647B - Spray nozzle for soot blower

Info

Publication number: CN111530647B
Application number: CN202010379078.4A
Authority: CN
Inventors: 张磊; 宋美键; 阳廷孝
Original assignee: Huaping Branch Of Cecep Industrial Energy Saving Co ltd
Current assignee: Cecep Chengdu Energy Technology Service Co ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2021-04-20
Anticipated expiration: 2040-05-07
Also published as: CN111530647A

Abstract

The invention relates to a spray head for a soot blower, which comprises a nozzle, wherein the nozzle comprises a hollow columnar nozzle, the inner cavity of the columnar nozzle is in a horn shape with a small inside and a large outside, and the inclination angle range of the inner side wall of the columnar nozzle is within 15 degrees. When a source of gas under pressure from the lance is distributed to the cylindrical nozzle, gas is distributed to the cylindrical nozzle from the inlet to the outlet, a process in which energy is suddenly released. The compressed gas with pressure is expanded in volume when passing through the outlet, and when the energy is suddenly released, the gas with energy released is sprayed to the periphery of the surface of the heat exchanger, so that the surface receiving area of the heat exchanger is diffused. Meanwhile, when the gas energy is released, all the columnar nozzles can simultaneously generate sound waves, the audio frequency exceeds more than 150 decibels, and meanwhile, the pipe network of the heat exchanger can vibrate along with the audio frequency, so that the dust on the surface of the heat exchanger falls off along with the vibration. The columnar nozzle is designed in a horn-shaped mode that the inner part is small and the outer part is large. The bell mouth is designed to enlarge the surface area of the heat exchanger and release energy audio sound waves.

Description

Spray nozzle for soot blower

Technical Field

The invention belongs to the field of machinery, and particularly relates to a spray head for a soot blower.

Background

At present, soot blowers (air shock waves and acetylene blasting soot blowing) manufactured by manufacturers at home and abroad adopt a straight pipe type blowing mode, the structure is single and simple, the rotary nozzle is high in temperature due to the space structure, the medium is flue gas dust, the dust is easy to enter, the rotary nozzle is locked and cannot rotate, the maintenance difficulty is high, the rotary nozzle can be maintained and cleaned only by stopping the machine, and the rotary nozzle is easy to oxidize, burn and damage due to the high temperature and is not easy to maintain.

Disclosure of Invention

The invention aims to provide a spray head for a soot blower, which can also realize the soot cleaning function, has good sealing effect between the spray nozzle and a spray pipe because of no need of rotation, and does not have the locking phenomenon.

The technical implementation scheme of the invention is as follows: the spray head for the soot blower comprises a nozzle, wherein the nozzle comprises a hollow columnar nozzle, the inner cavity of the columnar nozzle is in a horn shape with a small inside and a large outside, and the inclination angle range of the inner side wall of the columnar nozzle is within 15 degrees.

Furthermore, the nozzle also comprises a circular table extending outwards along the periphery of the bottom of the columnar nozzle, and nozzles are distributed around the circular table and are horn-shaped or stepped holes.

The side wall is fixed around the circular truncated cone, the outer peripheral surface of the side wall is provided with a screw for being connected with the spray pipe, and the upper surface of the circular truncated cone is provided with an O-shaped groove for placing the O-shaped sealing ring.

Further, the stepped hole is in a one-step stepped shape with a large lower part and a small upper part.

Furthermore, the plurality of columnar nozzles are distributed in the 360-degree plane range.

Advantageous effects

1. When a pressurized gas source from the lance is distributed to the cylindrical nozzles, the gas enters the gas injection chamber through the cylindrical nozzle inlet and is simultaneously distributed to the cylindrical nozzles from the gas distribution chamber, and the gas flows from the inlet to the outlet, which is a process of sudden energy release. The compressed gas with pressure is expanded in volume when passing through the outlet, and when the energy is suddenly released, the gas with energy released is sprayed to the periphery of the surface of the heat exchanger, so that the surface receiving area of the heat exchanger is diffused. Meanwhile, when the gas energy is released, all the columnar nozzles can generate sound waves at the same time, the sound wave energy is also very large, the audio frequency exceeds more than 150 decibels, and meanwhile, a heat exchanger pipe network can be caused to vibrate along with the audio frequency, and dust accumulated on the surface of the heat exchanger can fall off along with the vibration. The columnar nozzle is designed in a horn-shaped mode that the inner part is small and the outer part is large. The bell mouth is designed to enlarge the surface area of the heat exchanger and release energy audio sound waves. The design adopts the horn-shaped columnar nozzle, and the dust removing function can be realized. And because the rotation is not needed, the sealing effect of the nozzle and the spray pipe is good, the locking phenomenon can not occur, even if the dust scale in the space is too bad, the influence can not be caused, the nozzle can not be damaged, and the maintenance and the replacement are not needed.

2. When the soot blower starts to work: the pulse blowing valve of the soot blower starts to work, the high-pressure gas stored in the split gas collecting tank at 280L-300L is input into the spray gun after passing through the equipment on the soot blower, and is conducted to each nozzle, and the nozzles start to work. Because of the unique structural form of the nozzle, the columnar nozzle is provided with four to six nozzles, and after receiving an instruction, the nozzle almost simultaneously sprays released gas, in the process, sound has a time difference (the time difference is between 0.03 percent) when being conducted by air, and sound waves sprayed by each nozzle and the columnar nozzle are diffused to the periphery, so that a plurality of sound wave phases collide with each other and intersect with each other, the explosive force and the diffusion area of the sound waves are increased, the purposes of increasing the sound volume frequency and starting sound explosion are achieved, and meanwhile, the air pressure generated by air flow cannot be reduced, and the purpose of cleaning dust is achieved. The boiler internal structure 36O degree dead-corner-free soot blowing is completed by a plurality of nozzles.

Drawings

FIG. 1 is a bottom view of a nozzle for an ash blower in accordance with an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a nozzle for an ash blower in accordance with an embodiment of the present invention;

FIG. 3 is a perspective view of a nozzle for an ash blower according to an embodiment of the present invention.

Detailed Description

In order to make the objects, principles and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. In the present embodiment, the specific embodiments described are only to explain the present invention and are not to be construed as limiting the present invention.

Example one

As shown in fig. 1 to 3, the spray head for the soot blower comprises a nozzle 1, wherein the nozzle 1 comprises a hollow cylindrical nozzle, and the cylindrical nozzle is provided with a plurality of cylindrical nozzles. Distributed in a 360 degree plane. The inner cavity of the columnar nozzle is in a horn shape with a small inside and a large outside, and the inclination angle range of the inner side wall of the columnar nozzle is within 15 degrees. The nozzle further comprises a circular table 2 extending outwards along the periphery of the bottom of the columnar nozzle, nozzles 3 are distributed around the circular table 2, and the nozzles 3 are horn-shaped or stepped holes. Preferably, the stepped hole is stepped in one step with a large lower part and a small upper part. The spray pipe is characterized by further comprising a side wall 6 and an O-shaped sealing ring, wherein the side wall 6 is fixed around the circular truncated cone 2, a screw 5 is arranged on the outer peripheral surface of the side wall 6 and used for being connected with the spray pipe, and an O-shaped groove 4 used for placing the O-shaped sealing ring is formed in the upper surface of the circular truncated cone 2.

The design adopts a horn-shaped nozzle, four round small nozzles are designed around the nozzle 1, the four small nozzles are positioned according to the 90-degree direction of a circle, the purpose of the nozzle is consistent with the work efficiency of a rotary spray head, and no dead angle exists in 360 degrees. The arrangement is positive and negative structure, and the location form is the embedded connection of silk mouth, and sealed for high temperature resistant O type is sealed, even the space dust is too bad, also can not influence, can not harm nozzle 1 yet, does not need maintenance and change. The nozzle structure is different from nozzles in all soot blowing systems at home and abroad, is a special and independently designed nozzle which is suitable for a boiler structure and has a thoroughly good soot cleaning effect, and completes 36O-degree dead-angle-free soot blowing of the boiler internal structure by combining a plurality of nozzles.

The working principle is as follows: when the soot blower starts to work: the pulse blowing valve of the soot blower starts to work, the high-pressure gas stored in the split gas collecting tank at 280L-300L is input into the spray gun after passing through the equipment on the soot blower, and is conducted to each nozzle, and the nozzles start to work. Because of the unique structural form of the nozzle, the columnar nozzle is provided with four to six nozzles, and after receiving an instruction, the nozzle almost simultaneously sprays released gas, in the process, sound has a time difference (the time difference is between 0.03 percent) when being conducted by air, and sound waves sprayed by each nozzle are diffused to the periphery, so that the sound waves collide with each other and intersect with each other, the explosive force and the diffusion area of the sound waves are added, the aims of increasing the sound volume frequency and starting sound explosion are fulfilled, and meanwhile, the air pressure generated by air flow cannot be reduced, and the aim of cleaning dust is fulfilled.

The purpose of the nozzle is as follows: when a source of gas under pressure is distributed to the nozzles from the lance, the gas enters the gas injection chamber 7 through the nozzle inlet and is distributed by the gas distribution chamber 8 to the cylindrical nozzles and the individual nozzles simultaneously, from the inlet to the outlet, which is a sudden release of energy. The compressed gas with pressure is expanded in volume when passing through the outlet, and when the energy is suddenly released, the gas with energy released is sprayed to the periphery of the surface of the heat exchanger, so that the surface receiving area of the heat exchanger is diffused. Meanwhile, when the gas energy is released, all the columnar nozzles and the nozzles can generate sound waves at the same time, the sound wave energy is also very large, the audio frequency exceeds more than 150 decibels, and meanwhile, a heat exchanger pipe network can be caused to vibrate along with the audio frequency, and dust accumulated on the surface of the heat exchanger can fall off along with the vibration. The design concept of the bell mouth is as follows: the horn mouth is designed in such a way that the surface area of the heat exchanger is enlarged, and simultaneously, the energy audio sound waves are released, so that the horn-shaped heat exchanger is designed in a mode that the inside is small and the outside is large. The surrounding nozzles and the columnar nozzles are not at the same height, and time difference exists so as to increase the audio frequency. When the gas passes through the columnar nozzle, the purpose is to diffuse the surrounding area of the surface of the heat exchanger, and the limit use area and the optimal effect of one nozzle are enlarged. Another object is to provide a difference in length between the columnar nozzle and the nozzle opening in order to prolong the time difference in the propagation speed of sound.

The nozzle process comprises the following steps: after the air source enters the nozzle chamber, the air source is distributed to each nozzle by the air distribution chamber. The air source with air pressure passes through the columnar nozzle and each nozzle, the energy source is released suddenly, the volume of compressed air is increased due to the enlargement, the volume is increased, the columnar nozzle and each nozzle work almost simultaneously, and gas and sound waves are diffused all around rapidly.

Description of the working principle and structure of the columnar nozzle: the pulse blowing valve of the soot blower starts to work, the high-pressure gas stored in the split gas collecting tank at 280L-300L is input into the spray gun through the soot blower upper equipment and is conducted to each nozzle, the nozzle starts to do work, as one nozzle is provided with a horn-shaped cylindrical nozzle and four to six nozzles, the inlet aperture of the cylindrical nozzle is

The caliber of the nozzle is

The four are 24mm, the sum of the diameters is equal to that of the columnar nozzles, when a gas source with pressure from the spray gun is distributed to the nozzles, the gas enters the gas spraying chamber 7 through the nozzle inlets, is simultaneously distributed to the columnar nozzles and the nozzles through the gas distribution chamber 8, the pressure gas source distributed to the columnar nozzles by the gas distribution chamber is one half of one nozzle and is a little more than one point, the pneumatic release power is higher than that of each nozzle, and the force, the effect and the diffusion area sprayed by the columnar nozzles are higher than that of each nozzle.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. The spray head for the soot blower comprises a nozzle, wherein the nozzle comprises a hollow cylindrical nozzle, and is characterized in that: the inner cavity of the columnar nozzle is in a horn shape with a small inside and a large outside, the inclination angle range of the inner side wall of the columnar nozzle is within 15 degrees, the nozzle further comprises a round table extending outwards along the periphery of the bottom of the columnar nozzle, nozzles are distributed around the round table, and the nozzles are in a horn shape or are stepped holes.

2. The lance nozzle for a sootblower of claim 1, wherein: the spray pipe is characterized by further comprising a side wall and an O-shaped sealing ring, the side wall is fixed around the circular truncated cone, screws are arranged on the outer peripheral surface of the side wall and used for being connected with the spray pipe, and an O-shaped groove used for placing the O-shaped sealing ring is formed in the upper surface of the circular truncated cone.

3. The lance nozzle for a sootblower of claim 1, wherein: the stepped hole is in a one-stage stepped shape with a large lower part and a small upper part.

4. The lance nozzle for a sootblower of claim 1, wherein: the columnar nozzles are distributed in the 360-degree plane range.