CN217107591U - Silencer of gas injection fan - Google Patents

Abstract

The utility model belongs to the technical field of the noise control engineering, concretely relates to gas injection fan silencer. The utility model provides a silencer of a gas injection fan, which comprises an air inlet pipe, a shell, a primary air former, a primary air distributor, a primary air distribution pipe, a secondary air former, a secondary air distributor, a secondary air distribution pipe and an exhaust pipe; one end of the shell is connected with the air inlet pipe, and the other end of the shell is connected with the air exhaust pipe; a primary air distributor, a secondary air distributor and a secondary air distributor are sequentially arranged in the shell from the air inlet pipe to the air exhaust pipe; the primary air distribution pipes are distributed on the primary air distributor in a dispersing way, and the secondary air distribution pipes are distributed on the secondary air distributor in a dispersing way. The utility model provides a gas injection fan silencer can effectively reduce gas injection fan aerodynamic noise and type science, rational in infrastructure, stability strong, be convenient for loading and unloading, low cost.

Description

Silencer of gas injection fan

Technical Field

The utility model belongs to the technical field of the noise control engineering, concretely relates to gas injection fan silencer.

Background

The gas injection fan is the essential equipment in the good oxygen repair process of domestic waste landfill, its main function is to the internal portion air injection of rubbish heap, change the internal anaerobic environment of rubbish heap into good oxygen environment, through good oxygen microorganism's high-efficient degradation, but the decomposition of biodegradable organic matter with higher speed, reduce methane, ammonia, the production and the emission of landfill gas such as hydrogen sulfide and foul smell pollutant, reduce the filtration liquid concentration in the rubbish heap body, eliminate the potential pollution risk of domestic waste landfill, thereby realize the rapid stabilization of domestic waste landfill and the exploitation and utilization in place.

Generally, the domestic garbage is subjected to repeated rolling of a compactor in the process of landfill operation or mutual extrusion caused by self gravity, so that the garbage pile after sealing has the remarkable characteristics of high compaction degree and small porosity. This brings certain difficulty to the gas injection operation of the garbage heap body, and the air is difficult to migrate and diffuse in the garbage heap body, even causes a large amount of gas to be unable to inject into the garbage heap body and return to the air. Particularly, on a garbage stack body paved with an impermeable film, gas cannot effectively pour and is accumulated below the impermeable film, so that the impermeable film in a field area is bulged to form a bulge which is difficult to fade, gas injection operation cannot be continuously and stably carried out directly, and the safe operation of a gas injection fan is influenced.

Therefore, generally be equipped with the bypass on the gas injection fan exhaust pipe, when the rubbish heap body because the compactness is too high, the porosity undersize, when the too big unable smooth gas injection of gas injection resistance, can pass through the bypass, let some gas discharge through the bypass to cut down the amount of wind and the wind pressure that gets into the rubbish heap body to a certain extent, reduce the gas injection resistance, adapt to the compactness and the porosity situation of rubbish heap body better, avoid or alleviate the condition that is difficult to the gas injection.

However, since the air injection blower, especially the multi-stage centrifugal air injection blower, discharges the sucked air after being centrifugally compressed by the multi-stage impeller, the discharged air has a pressure as high as about 70kPa, which causes the gas discharged through the bypass to strongly impact the bypass cover, and generates aerodynamic noise pollution as high as about 90db (a), which seriously interferes and affects the working environment and physical and mental health of the site operation manager.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a gas injection fan silencer, its characterized in that: comprises an air inlet pipe, a shell, a primary air type device, a primary air distributor, a primary air distribution pipe, a secondary air type device, a secondary air distributor, a secondary air distribution pipe and an exhaust pipe; one end of the shell is connected with the air inlet pipe, and the other end of the shell is connected with the air exhaust pipe; a primary air distributor, a secondary air distributor and a secondary air distributor are sequentially arranged in the shell from the air inlet pipe to the air exhaust pipe; the primary air distribution pipes are distributed on the primary air distributor in a dispersing way, and the secondary air distribution pipes are distributed on the secondary air distributor in a dispersing way.

Furthermore, the primary wind-shaped device and the secondary wind-shaped device are inverted cones and are used for blocking the entering air flow.

Furthermore, an interlayer is arranged on the inner periphery or the periphery of the shell, and sound absorption materials are filled in the interlayer.

Specifically, the interlayer filling material is sound absorption cotton.

Furthermore, the primary air distribution pipes are distributed on the primary air distributor in a dispersing manner and are distributed annularly, and the secondary air distribution pipes are distributed on the secondary air distributor in a dispersing manner and are distributed annularly.

Furthermore, the inner diameter of the shell is larger than that of the air inlet pipe.

Further, the inner diameter of the shell is larger than that of the exhaust pipe.

Further, the gas injection fan silencer adopts vertical design. The air flow discharged from the exhaust pipe of the silencer is directly discharged to the air in a high position without any influence on adjacent objects, and the upper end and the lower end of the silencer are respectively provided with an air inlet pipe and an exhaust pipe which are used as a passage and a direction for the air to flow in and out, so that the mechanical stability of the silencer is improved.

The utility model provides a muffler of a gas injection fan, which is provided with a two-stage physical separation, absorption and attenuation noise reduction structure inside a shell, namely a first-stage air type device, a first-stage air distributor and a first-stage air distribution pipe; two stages of wind type devices, a secondary wind distributor and a secondary wind distribution pipe. The front center of the airflow entering the air inlet pipe is blocked by the primary air type device, the flow pattern of the airflow is changed into turbulence from direct current, and the airflow after physical blocking is dispersed and flows out through a plurality of primary air distribution pipes which are dispersedly distributed on the primary air distribution device at the rear end of the primary air type device, so that the airflow speed is reduced, and the airflow pressure is dispersed. The air flow passing through the primary air type device, the primary air distributor and the primary air distribution pipe is converged and then passes through the secondary air type device, the secondary air distributor and the secondary air distribution pipe again, so that the integral impact force and the vibration intensity of the air flow are further weakened, and the noise is reduced. In addition, the installation of sound absorbing material in the muffler shell sandwich can cause large pressure loss of the air flow, thereby buffering and absorbing a portion of the noise.

The utility model has the advantages that:

1. the aerodynamic noise of the gas injection fan can be effectively reduced, and the aerodynamic noise of the gas injection fan is scientific in type, reasonable in structure, strong in stability, convenient to assemble and disassemble and low in cost.

2. The utility model discloses the production source to gas injection fan operation noise is air vibration's essential characteristics, application aerodynamics, hydrodynamics and mechanical engineering principle, through extension air current discharge pipe length and/or enlarge air current discharge pipe internal diameter, install the sound insulation component additional, measures such as sound absorbing material and noise elimination component carry out the physics separation to the air current that gas injection fan exhaust pipe bypass was released, absorb, the decay, in order to reach the flow pattern of adjustment and control air current, the velocity of flow, increase the loss of pressure of air current, reduce the instantaneous flow of air current, it is strong to reduce the air current vibration source, make the noise source obtain progressively the decay by force, realize the sound insulation, the purpose of making an uproar falls in the combination of sound absorption and noise elimination processing.

3. When the utility model discloses a first grade wind type ware of gas injection fan silencer adopts the inverted cone, can carry out positive central separation to the air current that the air-supply line got into, change the flow pattern of air current into the torrent by the direct current, slow down the air current velocity of flow, dispersion air pressure.

4. The utility model discloses a gas injection fan silencer adopts vertical design, through the direct high-order unloading of silencer exhaust pipe combustion gas stream, can not cause any influence to adjacent object to both ends are equipped with air-supply line and exhaust pipe respectively about it, as the passageway and the direction of gas inflow and outflow, increase the mechanical stability of silencer.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Wherein the reference numerals are: the air inlet pipe comprises an air inlet pipe 1, a shell 2, sound absorption cotton 3, a primary air distributor 4, a primary air distributor 5, a primary air distribution pipe 6, a secondary air distributor 7, a secondary air distributor 8, a secondary air distribution pipe 9 and an exhaust pipe 10.

Detailed Description

In order to make the objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, specific details are set forth in order to provide a thorough understanding of the present invention, and similar modifications may be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is not limited by the specific embodiments disclosed below.

As shown in fig. 1, a muffler of a gas injection blower provided in an embodiment 1 of the present invention includes an air inlet pipe 1, a housing 2, a primary air distributor 4, a primary air distributor 5, a primary air distribution pipe 6, a secondary air distributor 7, a secondary air distributor 8, a secondary air distribution pipe 9, and an exhaust pipe 10; one end of the shell 2 is connected with the air inlet pipe 1, and the other end of the shell 2 is connected with the air exhaust pipe 10; a primary air distributor 4, a primary air distributor 5, a secondary air distributor 7 and a secondary air distributor 8 are sequentially distributed in the shell 2 from the air inlet pipe 1 to the air outlet pipe 10; the primary air distribution pipes 6 are dispersedly distributed on the primary air distributor 5, and the secondary air distribution pipes 9 are dispersedly distributed on the secondary air distributor 8.

In a specific embodiment 2, the primary and secondary stage blowers 4, 7 are arranged as inverted cones to block the incoming airflow.

In a specific embodiment 3, an interlayer is arranged at the inner periphery or the outer periphery of the shell 2, and the sound absorption material filled in the interlayer 2 is sound absorption cotton 3.

In a specific embodiment 4, the primary air distribution pipes 6 are distributed on the primary air distributor 5 in a distributed manner and are distributed annularly, and the secondary air distribution pipes 9 are distributed on the secondary air distributor 8 in a distributed manner and are distributed annularly.

In one embodiment 5, the inner diameter of the housing 2 is greater than the inner diameter of the air inlet duct 1.

In a specific embodiment 6, based on the previous embodiment, the inner diameter of the casing 2 is larger than the inner diameter of the exhaust duct 10.

In a specific embodiment 7, the gas injection fan muffler is designed vertically. The air flow discharged from the exhaust pipe of the silencer is directly discharged to the air in a high position without any influence on adjacent objects, and the upper end and the lower end of the silencer are respectively provided with an air inlet pipe and an exhaust pipe which are used as a passage and a direction for the air to flow in and out, so that the mechanical stability of the silencer is improved.

The utility model discloses according to the regulation of relevant standard such as "environmental noise monitoring technical specification structure propagation fixed equipment noise" (investigation draft), "environmental noise monitoring technical specification acoustic environment quality routine monitoring" (investigation draft), at 5m apart from noise source, 1.5m department from the ground, adopt the sound level meter to carry out the field test to the noise reduction effect of muffler in embodiment 3, the test result shows, after using the silencer, the noise is reduced to 61dB (A) after using by 91dB (A) before using, the noise reduction rate has reached 33%. Demonstrate the utility model discloses a gas injection fan silencer can effective separation, absorb and decay the air flow, pressure and the vibration source of releasing through gas injection fan air exit bypass are strong, are showing and are reducing gas injection fan noise, have realized the effective management and control of gas injection fan noise, have eliminated noise pollution.

Claims (8)

1. The utility model provides a gas injection fan silencer which characterized in that: comprises an air inlet pipe, a shell, a primary air type device, a primary air distributor, a primary air distribution pipe, a secondary air type device, a secondary air distributor, a secondary air distribution pipe and an exhaust pipe; one end of the shell is connected with the air inlet pipe, and the other end of the shell is connected with the air exhaust pipe; a primary air distributor, a secondary air distributor and a secondary air distributor are sequentially arranged in the shell from the air inlet pipe to the air exhaust pipe; the primary air distribution pipes are distributed on the primary air distributor in a dispersing way, and the secondary air distribution pipes are distributed on the secondary air distributor in a dispersing way.

2. A gas injection blower muffler as claimed in claim 1, wherein: the primary wind-shaped device and the secondary wind-shaped device are inverted cones.

3. A gas injection blower muffler as claimed in claim 1 or 2, wherein: an interlayer is arranged on the inner periphery or the periphery of the shell, and sound absorption materials are filled in the interlayer.

4. A gas injection blower muffler as claimed in claim 3, wherein: the sound absorption material filled in the interlayer is sound absorption cotton.

5. A gas injection blower muffler as claimed in claim 3, wherein: the primary air distribution pipes are distributed on the primary air distributor in a dispersing manner and are distributed in an annular manner, and the secondary air distribution pipes are distributed on the secondary air distributor in a dispersing manner and are distributed in an annular manner.

6. A gas injection blower muffler as claimed in claim 3, wherein: the inner diameter of the shell is larger than that of the air inlet pipe.

7. A gas injection blower muffler as claimed in claim 3, wherein: the gas injection fan silencer adopts a vertical design.

8. The gas injection blower muffler of claim 6, wherein: the inner diameter of the shell is larger than that of the exhaust pipe.

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