CN112523852A

CN112523852A - Tail gas purification and noise elimination system for generator set and working method

Info

Publication number: CN112523852A
Application number: CN202110055389.XA
Authority: CN
Inventors: 缪绍金; 王建峰; 缪景朋; 陈耀; 郭玮韡; 郭玮翔
Original assignee: Fujian Yanan Electric Machine Co ltd
Current assignee: Fujian Yanan Electric Machine Co ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-03-19

Abstract

The invention provides an exhaust gas purification and noise reduction system and a working method for a generator set. It is then connected to the resistive muffler and the resistive muffler for noise reduction treatment and then discharged. The exhaust gas purifier can effectively filter out soot particles and avoid the influence of particulate matter on the muffling effect and life of the resistive and resistive mufflers. The muffler system designs two types of mufflers, resistive and reactive, according to the spectral characteristics of the engine exhaust noise. The resistive muffler has obvious effect of eliminating medium and high frequency noise, while the resistive muffler can eliminate low-frequency noise. More advantages, this system can effectively suppress the emission of PM and other harmful particulate matter in diesel engine exhaust and reduce the noise of the generator set through the complementary advantages of the three, so as to ensure that the noise and smoke exhaust of the generator set meet the requirements of environmental protection.

Description

Tail gas purification and noise elimination system for generator set and working method

Technical Field

The invention relates to the technical field of generator sets, environmental protection and silencers, in particular to a tail gas purification and silencing system for a generator set and a working method.

Background

The generator set is power supply equipment widely applied to occasions needing independent power supply, such as emergency, standby power supply, communication, mining areas, capital construction, national defense and the like, and can generate serious noise pollution in the operation process. With the enhancement of environmental awareness and the improvement of requirements on living environment, the requirements of people on the silencing performance of the generator set are higher and higher. The main noise of the generator set is originated from the engine exhaust system, so that the addition of the noise elimination system at the exhaust outlet of the engine is an indispensable means in the noise reduction design of the generator set. Patent such as application number CN201721425783.3 and CN201420413758.3 all proposed the solution that adopts multistage muffler to reduce generating set noise, the not enough is, because of generating set because the insufficient production of burning can a large amount of black cigarette in the operation process, along with the accumulation of generating set operating duration, soot Particulate Matter (PM) in its tail gas is gathered inside exhaust duct and each grade muffler in a large number, can slowly block up the inside mesh of muffler, thereby cause the circumstances such as muffler damping performance decline, exhaust backpressure is too big to influence generating set performance. Meanwhile, the emission of dense smoke not only seriously affects the environment, but also can be inhaled by the human body (mainly PM10), even can enter the lung of the human body (mainly PM2.5), and affects the health of the operating personnel.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention provides a novel tail gas purification and noise elimination system for a generator set and a working method, which are particularly suitable for application scenes with higher requirements on noise and smoke discharge and provide a low-noise environment-friendly diesel generator set for users. Comprises a tail gas purifier, a resistive muffler and a reactive muffler, wherein tail gas containing carbon smoke Particles (PM) is purified and then is connected to the resistive muffler and the reactive muffler for noise reduction treatment and then is discharged, wherein the tail gas purifier can effectively filter soot particles, avoids the influence of the particles on the silencing effect and the service life of the resistive and resistant silencer, this noise elimination system has designed the muffler of two kinds of resistive nature and resistance to engine exhaust noise frequency spectrum characteristic, and resistive nature muffler has obvious elimination effect to well, high-frequency noise, and the resistance muffler then has more the advantage in the aspect of eliminating the low frequency noise, and this system is complementary through the advantage between the three, can effectively restrain harmful particulate matters such as PM of diesel engine tail gas and discharge and reduce the noise of unit to guarantee the noise of generating set and discharge fume and reach the requirement of environmental protection.

The technical scheme is as follows:

the utility model provides a tail gas purification noise elimination system for generating set which characterized in that: the exhaust muffler consists of an exhaust purifier, a resistive muffler and a reactive muffler which are connected in series.

Preferably, the filter material of the tail gas purifier is a ceramic soot particulate trap, and the shell is made of 304 stainless steel.

Preferably, a differential pressure sensor is installed on an air inlet of the exhaust purifier.

Preferably, the resistive muffler is composed of a resistive muffler shell, a first porous muffling pipe and high-temperature-resistant muffling cotton; the high-temperature-resistant silencing cotton is filled between the first porous silencing pipe and the resistive silencer shell.

Preferably, the reactive muffler is of a multi-chamber expanding series configuration.

Preferably, the reactive muffler comprises a reactive muffler shell and a second porous muffling pipe, the reactive muffler shell and the second porous muffling pipe are divided into a plurality of cavities through a plurality of partition plate assemblies, and adjacent cavities are connected through one or more communicating connecting pipes which are uniformly distributed.

Preferably, the passage frequencies of the cavity expanding modes are mutually staggered.

Preferably, the connecting pieces arranged on adjacent partition plate assemblies are staggered with respect to each other.

Preferably, the air conditioner is arranged on the exhaust side of the generator set.

According to the working method of the tail gas purification and noise elimination system for the generator set, the tail gas purification and noise elimination system is characterized in that: the tail gas that contains carbon smoke particulate matter is connected to resistive muffler and reactive muffler and is fallen the noise processing back and discharge after tail gas purification earlier, wherein tail gas purifier is used for filtering carbon smoke particulate matter, avoids the particulate matter to resistive muffler and reactive muffler noise cancelling effect and the influence of life-span, resistive muffler is used for eliminating the noise of well, high frequency, and the reactive muffler is used for eliminating low frequency noise.

The invention and the optimized proposal thereof integrate the functions of black smoke treatment and purification and noise reduction, have compact and reasonable structure, are convenient to maintain and can be repeatedly utilized. The silencing and environment-friendly performance of the generator set product can be improved, the service life of the exhaust silencing system is prolonged, and the silencing and environment-friendly exhaust silencing system has important significance for improving the overall competitiveness of the generator set product.

Drawings

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a schematic structural diagram of a tail gas purifying and silencing system for a generator set according to an embodiment of the invention;

FIG. 2 is a view of a half-section of a resistive muffler according to an embodiment of the present invention;

FIG. 3 is a half sectional view of a reactive muffler according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line C of FIG. 3 in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along line D of FIG. 3 in accordance with an embodiment of the present invention;

FIG. 6 is an illustration of an application example of the exhaust gas purifying and silencing system of the embodiment of the present invention in a generator set;

in the figure: 1-tail gas purifier; 2-resistive muffler; 3-reactive muffler; 4-maintaining the door; 21-resistive muffler shell; 22-a first porous muffler pipe; 23-high temperature resistant silencing cotton; 31-an air inlet end closing plate; 32-reactive muffler shell; 33-a second perforated muffler pipe; 34-a first diaphragm assembly; 35-a second baffle assembly; 36-exhaust end closing plate.

Detailed Description

In order to make the features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail as follows:

as shown in fig. 1, the exhaust gas purifying and muffling system for the generator set provided by the device of the present embodiment is composed of an exhaust gas purifier 1, a resistive muffler 2, and a resistive muffler 3.

In this embodiment, the housing of the exhaust gas purifier 1 is made of 304 stainless steel, and the filter material is a ceramic soot particulate trap, which has a honeycomb structure, a large trapping geometric area, a good trapping effect, and good heat resistance and mechanical durability. After the tail gas of the generator set passes through the tail gas purifier 1, the ceramic soot particulate trap catches soot particulates when the soot particulates pass through, and the concentration of the soot particulates in the tail gas is reduced. The adjacent passageway of inner wall that clear tail gas can pass through the clarifier is reserved, and the black smoke particulate matter in the tail gas can be held back in the honeycomb wall, and graininess harmful substance clearance reaches more than 90%.

In addition, this embodiment installs differential pressure sensor on exhaust purifier 1's air inlet, and when exhaust back pressure exceeded the setting value, the bypass will be opened automatically to guarantee diesel generating set's normal work, trigger simultaneously and report to the police and inform fortune dimension personnel, take off exhaust purifier 1 and maintain and can reuse after the clearance. The purified tail gas is subjected to noise reduction treatment by the resistive muffler 2 and the reactive muffler 3 and is finally discharged into the air.

As shown in fig. 2, the basic structure of the resistive muffler of the present embodiment is composed of a resistive muffler shell 21, a first porous muffler pipe 22, and high temperature resistant muffler cotton 23, and the high temperature resistant muffler cotton 23 is filled between the first porous muffler pipe 22 and the resistive muffler shell 21. When exhaust noise passes through the resistive muffler 2, the exhaust noise passes through the first porous muffling pipe 22, is absorbed by porous high-temperature-resistant muffling cotton 23 filled between the muffler shell 21 and the porous muffling pipe 22, and is converted into heat energy by friction to be dissipated, so that the noise transmitted along a pipeline is attenuated along with the distance, and the aim of muffling is fulfilled.

The damping volume of the resistive muffler 2 depends on the sound absorption coefficient of the high-temperature-resistant damping cotton and the effective length of the resistive muffler 2. The resistive muffler 2 is mainly used for eliminating high and medium frequency noise in exhaust noise, and it is particularly noted that when the channel sectional area of the first porous muffling tube 22 of the resistive muffler 2 is large, high-frequency sound waves directly pass through the muffler and contact with sound absorbing materials in a pipeline is reduced, the muffling effect is reduced, and a high-frequency failure phenomenon occurs, so that the channel sectional area of the first porous muffling tube 22 cannot be too large.

The reactive muffler and the resistive muffler have different muffling principles, and after exhaust noise passes through the inner cavity expansion of the reactive muffler and the resonator, the noise causes the impedance change in the sound transmission process to generate the reflection and interference of sound energy, so that the sound energy radiated outwards by the muffler is reduced, and the aim of muffling is fulfilled. The exhaust noise frequency distribution ranges from tens of hertz to thousands of hertz, and a common single-cavity expanding reactive muffler always has some undamped passing of the frequency. Therefore, it is necessary to improve the sound attenuation performance of the expanding type and reduce the passing frequency of the reactive muffler, and the multi-cavity expanding type serial connection mode is adopted in the embodiment.

As shown in fig. 3, the reactive muffler 3 is constituted by a reactive muffler shell 32 and a second porous muffler pipe 33, and possesses a plurality of subchambers: the inlet end closure plate 31 and the first diaphragm assembly 34 form a first chamber, the first diaphragm assembly 34 and the second diaphragm assembly 35 form a second chamber, and the second diaphragm assembly 35 and the exhaust end closure plate 36 form a third chamber, wherein the expanding passing frequencies of the chambers are designed to be staggered. In addition, as shown in fig. 4 and 5, the first partition plate assembly 34 and the second partition plate assembly 35 are also uniformly provided with a plurality of communicating connecting pipes while blocking circulation, and the communicating connecting pipes on different partition plate assemblies are suitable to be staggered by a certain angle.

The tail gas purification and noise elimination system disclosed by the invention is compact in structure, as shown in fig. 6, and is suitable for being installed on the exhaust side of a generator set, so that the influence of the heat radiation of the noise elimination system on the performance of the generator set is avoided while the internal space of the generator set is reasonably utilized, and the maintenance operation of the noise elimination system by designing the maintenance door 4 is more convenient.

The present invention is not limited to the above-mentioned preferred embodiments, and any other various types of exhaust gas purifying and silencing systems and working methods for generator sets can be obtained according to the teaching of the present invention.

Claims

1. The utility model provides a tail gas purification noise elimination system for generating set which characterized in that: the exhaust muffler consists of an exhaust purifier, a resistive muffler and a reactive muffler which are connected in series.

2. The tail gas purifying and silencing system for the generator set according to claim 1, characterized in that: the filtering material of the tail gas purifier is a ceramic soot particulate trap, and the shell is made of 304 stainless steel.

3. The tail gas purifying and silencing system for the generator set according to claim 1, characterized in that: and a differential pressure sensor is arranged on an air inlet of the tail gas purifier.

4. The tail gas purifying and silencing system for the generator set according to claim 1, characterized in that: the resistive muffler is composed of a resistive muffler shell, a first porous muffling pipe and high-temperature resistant muffling cotton; the high-temperature-resistant silencing cotton is filled between the first porous silencing pipe and the resistive silencer shell.

5. The tail gas purifying and silencing system for the generator set according to claim 1, characterized in that: the reactive muffler adopts a multi-cavity expanding type series structure.

6. The tail gas purifying and silencing system for the generator set according to claim 1, characterized in that: the reactive muffler comprises a reactive muffler shell and a second porous muffling pipe, the reactive muffler shell is divided into a plurality of cavities through a plurality of partition plate assemblies, and adjacent cavities are connected through one or more communicating connecting pipes which are uniformly distributed.

7. The tail gas purifying and silencing system for the generator set according to claim 6, characterized in that: the expanding passing frequencies of the cavities are staggered.

8. The tail gas purifying and silencing system for the generator set according to claim 6, characterized in that: the communicating connecting pipes arranged on the adjacent partition plate assemblies are staggered with each other.

9. The tail gas purifying and silencing system for the generator set according to claim 1, characterized in that: is arranged on the exhaust side of the generator set.

10. The working method of the tail gas purifying and noise eliminating system for the generator set according to claim 1 is characterized in that: the tail gas that contains carbon smoke particulate matter is connected to resistive muffler and reactive muffler and is fallen the noise processing back and discharge after tail gas purification earlier, wherein tail gas purifier is used for filtering carbon smoke particulate matter, avoids the particulate matter to resistive muffler and reactive muffler noise cancelling effect and the influence of life-span, resistive muffler is used for eliminating the noise of well, high frequency, and the reactive muffler is used for eliminating low frequency noise.