Gas exhaust muffler (XSQ-QT type)

The gas exhaust muffler is mainly designed for the exhaust of fans. Fans are a general mechanical equipment with a wide range of applications. Production in various industries such as power, mining, machinery, metallurgy, and chemical industry cannot do without fans. The noise generated by fans during operation often becomes a source of harm to workers' health and environmental disturbance. Especially for fans located near residential areas, the aerodynamic noise radiated from their inlet and outlet is a major factor in environmental pollution, forming a public hazard. It has become one of the main targets of noise pollution control in China's industrial sector in recent years.Industrial fans are equipment that operates continuously. The International Organization for Standardization (ISO) sets a noise standard of ≤ 90 decibels for such equipment, and China's new standard is the same. This is also the basis for industrial enterprises to achieve continuous noise standards. However, without using noise reduction measures, the noise emitted by the fan inlet and outlet to the environment can reach 110-120 decibels, greatly exceeding environmental requirements.

working principle:　
A resistive muffler is an absorption type muffler, which is generally divided into straight pipe, sheet, folded plate, honeycomb, acoustic flow, labyrinth, and elbow types according to the structure of the airflow channel. A resistive muffler is a type of muffler that utilizes the frictional and viscous resistance of sound waves propagating through porous sound-absorbing materials to convert sound energy into heat energy and dissipate it, thereby achieving the purpose of noise reduction. It is a widely used type of muffler among all mufflers.
Resistance muffler has a different principle from resistive muffler in terms of noise reduction. It cannot directly absorb sound energy, but instead uses the interface or adjacent resonant cavity on the pipeline to reflect and interfere with certain frequency sound waves propagating along the pipeline at the interface, thereby achieving the purpose of noise reduction. It is divided into expansion chamber muffler and resonant muffler.
The exhaust muffler produced by Glee's fan is an impedance composite muffler,Combining resistive sound-absorbing and resistant sound-absorbing structures to control high-intensity broadband noise.Based on the actual testing of various types of wind turbine operation site noise sources, the required amount of noise reduction in which frequency spectrum range is determined as the main basis for designing the structure of the sound-absorbing sheet and fluid channel. At the same time, narrow rectangular channels with large sound-absorbing material finishes are used to enhance the absorption effect. When the noise source of a fan is at its maximum noise level, there is often more than one spectral value, and the requirements for its noise reduction vary for different spectral bands. For this purpose, this product adopts a resistive structure for silencing high and medium frequency noise, as well as an anti type structure for silencing medium and low frequency noise. At the same time, two types of silencing zones, high frequency and low frequency, are used in the resistive channel to maximize the broadening of the silencing frequency band and achieve good silencing effect.

Comprehensive parameters:

1. Noise reduction form: small hole injection throttling impedance composite;
2. Main material: A3, 304, 304L, 316, 316L;
3. Noise reducing materials: imported porous cotton, carbon steel, stainless steel, fiberglass;
4. Nut bolts: A3, 304, 304L, 316, 316L;
5. Sealing gaskets: Nitrile rubber gasket, PTFE gasket, high-temperature resistant PTFE gasket, metal gasket, graphite gasket;
6. Sealing surface: protruding surface (RF), flat surface (FF), concave convex surface (MFM), tenon groove surface (TG);
7. Connection methods: flange connection, internal thread connection, external thread connection, butt welding connection;
8. Manufacturing and testing standards: GB12348-90 GB/T14623-93.

Installation instructions:
1. The muffler equipment should be installed perpendicular to the roof of the factory, and the muffler bracket should be fixed to the factory building with steel brackets.
2. To increase the wind resistance of the factory roof at high altitude, the muffler adopts a supporting support. The exhaust pipe in front of the muffler should have an expansion bend to absorb thermal expansion. If the original exhaust pipe section is already equipped with a drain valve in the vertical direction, the expansion bend can be omitted.
3. The bottom of the muffler equipment body is designed with drainage pipes or holes, and the holes should be checked for smoothness. The exhaust pipe should pass through the opening of the factory roof platform and be covered with a thin steel plate to prevent rain.
4. In principle, one safety door is equipped with one muffler. There are two types of safety doors: single seat and double seat. For the double seat type, the exhaust pipe can be merged into a main pipe and connected to the muffler during installation. However, for the double seat type safety door with a large exhaust volume, two mufflers can also be installed.
5. For small displacement silencers used for deaerators, jet type air extractors, etc., the external design is tubular and the installation is relatively simple. The muffler equipment is installed vertically along the walls and columns of the main factory building. Install steel sliding brackets on walls and columns, and install silencers and pipelines on them. The discharge outlet of the silencer equipment should face the direction of the roof. It should be noted that when using sliding bracket installation, fixed supports can be omitted.

Ordering Notice:
1. What type of thermal equipment is the target of noise reduction
2. Pipe diameter of takeover pipe (outer diameter x pipe wall thickness)
3. Exhaust volume ____T/H
4. Pressure ____Map
5. Temperature ____ ℃