CN113323921A

CN113323921A - Dustproof silencer suitable for cement plant

Info

Publication number: CN113323921A
Application number: CN202110623320.2A
Authority: CN
Inventors: 胡聪; 王胜; 黄青青; 邵志跃; 丁康凯
Original assignee: Beichen Shanghai Environmental Technology Co ltd
Current assignee: Beichen Shanghai Environmental Technology Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-08-31

Abstract

The invention discloses a dust-proof muffler suitable for a cement plant, comprising a muffler including a variable diameter section, a muffler shell, an outer frame of a muffler insert, a PVF film, and a sound-absorbing cotton. The muffler is installed inside the outer frame of the muffler. Sound inserts, limiting grooves are arranged on the inner wall of the muffler shell, and the PVE film is arranged on the peripheral side of the sound-absorbing cotton in a wrapping shape. The special performance of the PVF film on the surface of the muffler insert inside the dust-proof muffler of the present invention makes the dust not adhere to the surface, but the sound energy can be absorbed by the internal sound-absorbing cotton through the film, so as to achieve the purpose of noise reduction. The invention effectively reduces investment in practical engineering and improves the service life of the muffler.

Description

Dustproof silencer suitable for cement plant

Technical Field

The invention relates to the technical field of dustproof silencers, in particular to a dustproof silencer suitable for a cement plant.

Background

Through actual research on various resistive mufflers such as dust collection fans and grate cooling fans in traditional cement plants, a plurality of technical bottlenecks of various existing exhaust resistive mufflers are found, wherein most of the technical bottlenecks are difficult to overcome the problem that the performance of the muffler is linearly reduced due to the blockage of a pore plate caused by long-time dust accumulation of the muffler;

the resistive muffler utilizes the inner side perforated steel plate micro-perforation sound absorption principle and the sound wave entering the perforated plate to contact with the inner side porous sound absorption material, and the porous sound absorption material has a plurality of tiny gaps and continuous bubbles, so that the resistive muffler has certain air permeability. When sound waves are incident to the surface of the porous material, the sound waves are attenuated mainly by two mechanisms, firstly, the vibration generated by the sound waves causes the air in the pores or gaps to move, so that the air is rubbed with the pore walls, the air close to the pore walls and the surfaces of the fibers is not easy to move under the influence of the pore walls, and a considerable part of sound energy is converted into heat energy due to the action of friction and viscous force, so that the sound waves are attenuated, and the reflected sound is attenuated to achieve the purpose of sound absorption.

Because cement factory's dust is more, orifice plate and inboard sound absorbing material deposition after traditional silencer long-time at present lead to the hole to be blockked up to make silencer performance discount greatly, adopt regularly to dismantle the deashing work to this type of silencer on the market at present, or directly carry out the silencer of renewal, the cost is higher. Accordingly, the present invention is directed to a dust-proof muffler for a cement plant, which solves the above problems.

Disclosure of Invention

The invention aims to provide a dustproof silencer suitable for a cement plant to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a dustproof silencer suitable for cement factory, is including reducing section, silencer shell, noise elimination inserted sheet frame, PVF film, sound absorption cotton including disappearing, noise elimination piece frame internally mounted has the noise elimination inserted sheet, is provided with the spacing groove on the silencer shell inner wall PVE film sets up in sound absorption cotton week side, is the parcel form.

As a further scheme of the invention, the two variable-diameter sections are respectively positioned at the lower two ends of the shell of the silencer and play a role in expanding the pipe diameter.

As a further scheme of the invention, the silencer shell is clamped with the outer frame of the silencing insertion sheet through the limiting groove.

Compared with the prior art, the invention has the beneficial effects that:

1. the special performance of the PVF film on the surface of the noise elimination insert sheet in the dustproof silencer ensures that dust does not adhere to the surface, but sound energy can be absorbed by the internal sound absorption cotton through the film, thereby achieving the purpose of noise reduction.

2. The invention effectively reduces the investment in the actual engineering and prolongs the service life of the silencer.

Drawings

Fig. 1 is a schematic structural diagram of a dust-proof muffler suitable for a cement plant.

Fig. 2 is a schematic structural view of an outer frame of a silencing insert used in a dustproof muffler of a cement plant.

Fig. 3 is a schematic structural view of a silencing insert and a limiting groove in a dustproof muffler suitable for a cement plant.

In the figure: 1. a diameter-changing section; 2. a muffler housing; 3. a silencing insert; 4. a silencing insert outer frame; 5. a PVF film; 6. sound absorbing cotton; 7. a limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, in the embodiment of the invention, a dustproof silencer suitable for a cement plant comprises a reducer section 1, a silencer shell 2, a silencing insertion sheet outer frame 4, a PVF film 5 and sound absorption cotton 6, and is characterized in that the silencing insertion sheet 3 is installed in the silencing insertion sheet outer frame 4 and limits the silencing insertion sheet to have good structural performance, a limiting groove 7 is formed in the inner wall of the silencer shell 2, and the silencer shell 2 is clamped with the silencing insertion sheet outer frame 4 through the limiting groove 7 to prevent the internal structure from being damaged due to overhigh air flow speed;

the PVE films 5 are arranged on the periphery of the sound absorption cotton 6 and are wrapped, and the variable-diameter sections 1 are two in number and are respectively positioned at the lower two ends of the silencer shell 2 to play a role in expanding the pipe diameter.

The working principle of the invention is as follows:

when dusty air current passes through dustproof silencer, because the special properties of PVF film 5 on the surface of noise elimination inserted sheet 3 in the dustproof silencer, make its dust not adhere to the surface, but sound energy can be absorbed by inside sound absorption cotton 6 through PVF film 5 to reach and fall the mesh of making an uproar.

The silencer comprises a reducer section 1, a silencer shell 2, a silencing insertion piece 3, a silencing insertion piece outer frame 4, a PVF film 5, sound absorption cotton 6 and a limiting groove 7. The purpose of reducing weight is achieved by changing the structure of the two layers of perforated plates of the original silencing insert outer frame 4 into a strip-shaped outer frame.

The inner silencing insert adopts PVF film 5 to wrap sound absorption cotton 6 to replace a perforated plate, hydrophobic glass fiber cloth and sound absorption cotton 6, the PVF film 5 is polyvinyl fluoride, and is formed by extruding a copolymer of fluorine and fluorocarbon molecules. Has greater binding capacity and structural stability than any other polymer. Meanwhile, the PVF film 5 has strong sound transmission performance and has a certain sound absorption effect on part of high-frequency noise. Since the surface of the PVF film 5 is a smooth polymer and is non-porous, dust is not easily accumulated, and the acoustic performance is not affected.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A dust-proof muffler suitable for a cement plant, comprising a muffler including a variable diameter section (1), a muffler shell (2), an outer frame of a muffler insert (4), a PVF film (5), and a sound-absorbing cotton (6). ), characterized in that a muffler insert (3) is installed inside the outer frame (4) of the muffler, and a limit slot (7) is provided on the inner wall of the muffler housing (2).

2 . A dust-proof muffler suitable for a cement plant according to claim 1 , wherein the PVF film ( 5 ) is arranged on the peripheral side of the sound-absorbing cotton ( 6 ) in a wrapped shape. 3 .

3. A kind of dust-proof muffler suitable for cement plant according to claim 1, is characterized in that, described variable diameter section (1) has two altogether, respectively is located at the lower two ends of muffler shell (2), from expansion pipe diameter effect.

4. A dust-proof muffler suitable for a cement plant according to claim 1, characterized in that the muffler shell (2) is clamped to the muffler insert frame (4) through a limit groove (7) .