generator setsilencer

1、 Power generationUnit silencerIntroduction
1. The noise from generator sets often becomes the main source of environmental noise pollution.

nowadaysSociety fornoiseThe requirements are becoming increasingly high, and how to effectively control its noise pollution is a difficult and highly valuable task for promotion. This is also our goalNoise controlThe main job. In order to do this job well, the first step is to understand and analyze the composition of noise from diesel generator sets. Exhaust noise control: attenuate sound waves through expansion chambers and perforated plates,makeThe sound turns into heat and disappears，The effective method to control exhaust noise is to install exhaust mufflers. This standard specifies the technical requirements for the design, construction, acceptance, and operation management of diesel generator noise treatment projects, which can serve as a technical basis for environmental impact assessment, feasibility study, design and construction, environmental protection acceptance, and post construction operation and management.

2、power generationNormative reference documents for unit silencers
　(1) Laws and regulations related to environmental protection
　(2)《soundEnvironmental Quality Standards(GB33096-2008)　
　(3) Emission Standard for Industrial Enterprise Boundary Environmental Noise (GB12348-2008)
3、power generationUnit silencer design
(1) The generator noise should meet the corresponding noise emission standards for each regional category in the national standard "Environmental Noise Standards for Urban Areas" (GB 3097-93).

(2) The scale and process of diesel generator noise treatment should be determined based on the actual situation such as the location of the enterprise's diesel generator, the spatial structure of the machine room, the power and quantity of the generators, etc., to achieve environmental protection, economic rationality, and technical reliability.
(3) The selection of engineering technical solutions should comply with the requirements of the environmental impact assessment report approval document, and the noise treatment of diesel generators should stably meet the relevant national and local emission standards.
4、power generationcrewNoise control and power generationcrewexhaustsilencerform
　  The noise of diesel generators mainly includes the exhaust noise, intake noise, combustion noise of the engine, and the noise of moving parts such as connecting rods, pistons, and gears during operationcycleMechanical noise and cooling water exhaust fan airflow noise generated by high-speed motion and impact. The comprehensive noise of diesel generator sets is very high. Depending on the power level, it is generallyreach, achieve, attain100-125dB(A)。 The methods for noise control of diesel generators include noise reduction treatment of intake, exhaust, and gas exhaust channels, sound absorption treatment in the engine room, and sound insulation treatment in the engine room. The damping generator muffler is a split cavity tube type structure, and a grid hole damper is installed in the third cavity (turbulent cavity) to remove the dampingsoundThe impact vibration and vortex formed by multiple vortices of the airflow inside the device reduce exhaust noise and unnecessary power loss. There are many types of generator silencers, but when it comes to noise reductionprinciple, mainly divided intosixThe types of mufflers include resistive mufflers, resistance mufflers, impedance composite mufflers, micro perforated plate mufflers, small hole mufflers, and damping mufflers. Diesel generator sets use three-stage mufflers.
IIpower generationUnit silencerDesign Key Points
   Our company producesDiesel generator setUsing multiple methodsGrade silencerIt includes an intake pipe, an internal duct, two layers of internal partitions, an internal exhaust pipe, a muffler, and an exhaust pipe. The center of the intake pipe is fixed to the mufflerAt 1/6 position, perpendicular to the axis of the silencer, both ends of the silencer are sealed with sealing plates, and the exhaust pipe is fixed to the end face of the silencer. There are at least two partitions fixed inside the silencer to divide it into equal partsmanyBetween the two layers of partitions, there is a fixed internal ventilation pipe and a ventilation pipe made of perforated plates, forming a maze for exhaust gas. Then, the exhaust gas is led to the exhaust pipe through the internal exhaust pipe on the outer partition, and the exhaust gas is discharged from the exhaust pipe. The muffler and the inner wall of the exhaust pipe are filled with sound-absorbing and heat-insulating stainless steel wire mesh and microporous plates, which are used to reflect and absorb exhaust gas noise, and impedance silencing is carried out on the exhaust gas to attenuate its sound field, thus achieving the effect of noise reduction. Compared to secondary mufflers and industrial mufflers,manyLevel noise reduction expansion chamber, with good medium and high frequency noise reduction performance; After installing the muffler, it does not affect the efficiency of the equipment and canmakeSmooth intake and exhaust; But it has a large volume and is suitable for use on units with high noise reduction requirements or in noise reduction rooms. Can reduce noise25-35dBA。