CN206891220U - A kind of large cooling column porting silencing apparatus - Google Patents

Abstract

The utility model relates to a muffler for the intake and exhaust ports of a large cooling tower. It includes exhaust muffler, air outlet, deflector, air inlet muffler, frame, air inlet, sound-absorbing cover, and sound-absorbing enclosure. The exhaust muffler is installed on the upper part of the exhaust outlet, and the flow guide device is installed between the exhaust outlet and the exhaust muffler, and is connected to the exhaust outlet; the air inlet is located at the air inlet position on the side of the cooling tower building, and the inlet The wind muffler is installed on the air inlet, the sound-absorbing cover plate is installed on the top of the air-inlet muffler, the sound-absorbing enclosure is installed longitudinally on the upper side of the cooling tower building, and the top of the sound-absorbing enclosure is connected to the bottom of the air outlet. The sides are parallel, the frame is installed on the air inlet, and the air inlet muffler is embedded in the frame. The utility model can effectively ensure that the noise of the air inlet and outlet of the large cooling tower is reduced to 55dB(A) or below without affecting the cooling effect of the cooling tower, and effectively solves the problem of noise nuisance when the cooling tower is cooling.

Description

A large cooling tower inlet and outlet muffler

technical field

The utility model relates to a muffler for the intake and exhaust outlets of a large cooling tower, which belongs to the transformation technology of the muffler for the intake and exhaust outlets of the large cooling tower.

Background technique

In the water supply system equipment, the steam turbine condenser of the combined cycle unit is often used to cool the exhaust steam of the steam turbine. The cooling water demand of the condenser is quite large. The circulating water is taken from the water plant according to the local hydrological conditions and geographical conditions during design. Reclaimed water; In order to fully consider the requirements of water saving, a secondary circulation water supply system with six large-scale mechanical ventilation cooling towers is adopted in the factory area. However, mechanical draft cooling towers are noisy. Its noise sources mainly include cooling tower air inlet noise, exhaust fan noise, water spray noise, reducer and motor noise, etc. The noise value of the air inlet often reaches 85dB, seriously exceeding the "Social Living Environment Noise Emission Standard" GB22337- The daytime noise standard was stipulated in 2008, which affects the surrounding environment and the daily life of the surrounding residents. Targeted comprehensive treatment is necessary to reduce the noise pollution of large cooling towers.

Contents of the invention

The purpose of this utility model is to fully consider the above problems and provide a large-scale cooling tower inlet and outlet muffler, the utility model can effectively ensure that the noise of the large-scale cooling tower inlet and exhaust outlets is reduced to 55dB (A) and below , and does not affect the cooling effect of the cooling tower, effectively solving the problem of noise nuisance when the cooling tower is cooling.

The technical scheme of the utility model is: the large-scale cooling tower inlet and outlet muffler device of the utility model includes an exhaust muffler, an air outlet, a flow guide device, an air inlet muffler, a frame, an air inlet, and a sound-absorbing cover board, sound-absorbing enclosure, in which the exhaust outlet is set on the top of the cooling tower building fan outlet, the exhaust muffler is installed on the upper part of the exhaust outlet, and the flow guide device is installed between the exhaust outlet and the exhaust muffler The air inlet is located at the air inlet position on the side of the cooling tower building, the air inlet muffler is installed on the air inlet, the sound absorption cover is installed on the top of the air inlet muffler, and the sound absorption enclosure is longitudinal It is installed on the upper side of the cooling tower building, and the top of the sound-absorbing enclosure is parallel to the bottom of the air outlet. The frame is installed on the air inlet, and the air inlet muffler is embedded in the frame.

Because the utility model adopts the combined structure of the air inlet noise reduction and exhaust air noise elimination, the air inlet muffler is installed at the air inlet of the large-scale cooling tower, the exhaust air muffler is installed at the air outlet, and the flow guide device is installed to ensure the large-scale The noise at the air inlet and exhaust outlet of the cooling tower is reduced to 55dB(A) without affecting the cooling effect of the cooling tower. The utility model provides a large-scale cooling tower inlet and outlet muffler with ingenious design and superior performance.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the utility model muffler;

Fig. 3 is the structural representation of the arrangement of sound-absorbing plates in the silencer of the present invention;

Fig. 4 is the sectional view of A-A in Fig. 3;

Fig. 5 is a partial enlarged view of position I in Fig. 3 .

detailed description

Example:

The structural diagram of the utility model is shown in Figure 1-Figure 5. The large-scale cooling tower inlet and outlet muffler device of the utility model includes an exhaust muffler 1, an exhaust outlet 2, a flow guide device 3, and an air inlet muffler. 4, frame 5, air inlet 6, sound-absorbing cover plate 7, sound-absorbing enclosure 8, wherein the air outlet 2 is set on the top of the cooling tower building fan outlet air duct, and the exhaust muffler 1 is installed on the air outlet 2 The upper part of the cooling tower, the deflector 3 is installed between the air outlet 2 and the exhaust muffler 1, and is connected to the air outlet 2; the air inlet 6 is located at the air inlet position on the side of the cooling tower building, and the air inlet muffler 4 is installed Set on the air inlet 6, the sound-absorbing cover plate 7 is installed on the top of the air-inlet muffler 4, the sound-absorbing enclosure 8 is installed longitudinally on the upper side of the cooling tower building, and the top of the sound-absorbing enclosure 8 is connected to the air outlet The bottom edges of 2 are parallel, the frame 5 is installed on the air inlet 6, and the air inlet muffler 4 is embedded in the frame 5.

In this embodiment, the above-mentioned frame 5 is a steel keel structure frame.

In this embodiment, the above-mentioned air inlet muffler 4 and exhaust muffler 1 have the same structure, and both include a number of sound-absorbing sheets 9, perforated plates 13, water-repellent glass cloth 12, and sound-absorbing cotton 11, wherein several sound-absorbing sheets 9 are arranged vertically. , and fixed on the frame 5, the end faces of several sound-absorbing sheets 9 are provided with end-face cover plates 10 to form a closed cavity, and sound-absorbing cotton 11 is filled in the cavity, and the inner and outer sides of each sound-absorbing sheet 9 are respectively installed A perforated plate 13 is provided, and the water-repellent glass cloth 12 is tightly adhered to the inner side of the perforated plate 13 . The sound-absorbing sheet 9 enclosed by the perforated plate 13 and the end cover plate 10 forms a sound-absorbing resonant sound-absorbing cavity body, and cooperates with the sound-absorbing cotton 11 filled in the cavity to increase the sound absorption coefficient within the resonance frequency range . Hydrophobic glass cloth 12 is made of alkali-free hydrophobic glass cloth, which is closely attached to the inner side of perforated plate 13 to prevent the sound-absorbing material (glass wool 11) filled in the air layer from entering water and corroding, so as to prolong the service life of the noise reduction device) .

In this embodiment, the above-mentioned end cover plate 10 adopts an arc-shaped galvanized plate, and the arc-shaped galvanized plate is riveted with the perforated plate 13 by rivets to form a closed cavity.

In this embodiment, each of the above-mentioned sound-absorbing sheets 9 is connected to the frame 5 with screws, and the screws may be drilling screws

In this embodiment, the noise at the air inlet of the cooling tower mainly includes water spray noise, aerodynamic noise generated by the fan, and backpropagation of equipment mechanical noise through the filler. Therefore, the air inlet muffler 4 of the present utility model is mainly aimed at medium and high frequencies, while taking into account low frequencies.

In this embodiment, the noise due to the air outlet of the cooling tower mainly includes the aerodynamic noise generated by the fan and the mechanical noise of the equipment. Therefore, the exhaust muffler 1 of the present utility model is mainly aimed at low and medium frequencies.

In this embodiment, the perforated plate 13 in the utility model adopts a thin plate with a plate thickness of 0.8 mm to perforate micro holes with a diameter of 1.0 mm, and a perforated plate with a perforation rate of 20% constitutes a micro perforated plate sound-absorbing structure. It is a resonant sound-absorbing structure with low sound quality and high sound resistance. The intensity of the sound of the resonant sound-absorbing structure is low, and the quality is low, which achieves the effect of sound resistance.

In this embodiment, the sound-absorbing cotton 11 is fixed on the inner wall of the airflow channel to reduce noise, or the utility model can use porous sound-absorbing materials arranged in a certain way in the pipeline to reduce noise.

In this embodiment, the water-repellent glass cloth 12 is made of non-alkali water-repellent glass cloth, which is closely attached to the inner side of the perforated plate 13 to prevent the sound-absorbing material (glass wool 11) filled in the air layer from entering and corroding, so as to prolong the sound absorption. The service life of the device.

When the utility model is in use, when the noise enters the air inlet muffler 4 arranged on the air inlet from the air inlet 6, or enters the exhaust muffler 1 arranged on the air outlet 2 from the air outlet 2, the noise passes through the muffler sheet 9, The perforated plate 13 and sound-absorbing cotton 11 have the barrier and sound-absorbing functions to filter most of the middle and low-frequency noise components. The noise reduction of the air inlet muffler 4 reaches the design value of 35dB(A), and the noise reduction of the exhaust muffler 1 reaches the design value of 30dB. (A) above. At the same time, guide devices 3 are installed on both the air inlet side and the ventilation side to reduce the system resistance loss of the entire noise reduction device and ensure that the cooling effect of the cooling tower is not affected, thus effectively solving the problem of excessive noise when the cooling tower is working problem of interference.

Claims (7)

1. a kind of large cooling column porting silencing apparatus, it is characterised in that include air-discharge silencer, exhaust outlet, water conservancy diversion dress Put, suction silencer, framework, air inlet, sound absorption cover plate, sound absorption enclosing, wherein exhaust outlet be located at cooling tower building fan outlet The top of air duct, air-discharge silencer are installed in the top of exhaust outlet, and guiding device is installed between exhaust outlet and air draft muffler, And it is connected with exhaust outlet；Air inlet is installed on air inlet positioned at the air intake position of cooling tower building sidepiece, air-inlet sound eliminator, is inhaled Sound cover plate is installed in the top of air-inlet sound eliminator, and sound absorption enclosing is longitudinally installed in the upside of cooling tower building, and the enclosing that absorbs sound Top is parallel with the base of exhaust outlet, and framework is installed on air inlet, and air-inlet sound eliminator is inlayed in the frame.

2. large cooling column porting silencing apparatus according to claim 1, it is characterised in that said frame is keel Steel structure frame.

3. large cooling column porting silencing apparatus according to claim 1 or 2, it is characterised in that above-mentioned air intake is eliminated the noise The structure of device and air-discharge silencer is identical, all includes some anechoic sheets, perforated plate, hydrophobic glass cloth, acoustical cotton, wherein some Anechoic sheet longitudinal arrangement, and be fixed on framework, the end face of some anechoic sheets is provided with the cavity that end caps form a closing, Acoustical cotton is filled in the cavity, and perforated plate is installed in the inner side and outside of every anechoic sheet respectively, and hydrophobic glass cloth, which is installed in, to be worn The inner side of orifice plate.

4. large cooling column porting silencing apparatus according to claim 3, it is characterised in that above-mentioned hydrophobic glass cloth Paste in the inner side of perforated plate.

5. large cooling column porting silencing apparatus according to claim 3, it is characterised in that above-mentioned end caps are used Rivet mutually rivets the cavity to form a closing with perforated plate.

6. large cooling column porting silencing apparatus according to claim 3, it is characterised in that above-mentioned end caps are adopted With circular arc galvanized sheet.

7. large cooling column porting silencing apparatus according to claim 3, it is characterised in that above-mentioned every piece of anechoic sheet It is connected with screw with framework.