CN210892664U - Noise control device for rotary kiln body cooling system - Google Patents
Noise control device for rotary kiln body cooling system Download PDFInfo
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- CN210892664U CN210892664U CN201921408447.7U CN201921408447U CN210892664U CN 210892664 U CN210892664 U CN 210892664U CN 201921408447 U CN201921408447 U CN 201921408447U CN 210892664 U CN210892664 U CN 210892664U
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- rotary kiln
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Abstract
The utility model relates to a noise control device of a rotary kiln body cooling system, which comprises a sound insulation cover, a noise elimination air inlet bin, a noise elimination air duct, a blower, a noise elimination chamber, a noise elimination regulation bin and a gas supply chamber; the blower is arranged in the sound insulation cover, and the silencing air inlet bin is communicated with the sound insulation cover and used for fresh air to flow in; the air feeder is communicated with the silencing chamber through a silencing air channel and used for feeding cooling air into the silencing chamber; the silencing chamber is communicated with the silencing adjusting bin, and the tail end of the silencing adjusting bin is provided with a gas supply chamber; the air inlet end on the muffling chamber is transversely provided with an air distributor, the middle part of the muffling chamber is vertically provided with a plurality of sound absorbers, cooling air passes through the air distributor and then is uniformly dispersed, and the cooling air is sent into the muffling adjusting bin along the gap between the sound absorbers and then is used for cooling the kiln body of the rotary kiln through the air supply chamber.
Description
Technical Field
The utility model relates to a rotary kiln cooling field, concretely relates to rotary kiln body cooling system noise treatment device.
Background
The rotary kiln is a rotary calcining kiln (commonly called rotary kiln) and belongs to building material equipment. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the different materials to be treated. The cement kiln is mainly used for calcining cement clinker and comprises a dry-process cement kiln and a wet-process cement kiln. The surface temperature of the cement kiln fired by the rotary kiln is about 360 ℃, and the cement kiln must be forcibly cooled. The method generally adopted at present is to use an axial flow fan to blow air for cooling, wherein 10-14 axial flow fans are arranged in the middle of a rotary kiln to send air into an air pipe and to the outer surface of the rotary kiln body, and the air is discharged into the atmosphere after absorbing the heat of the rotary kiln body. In order to improve the air flow rate, an exhaust port at the tail end of the air pipe is generally designed into a duckbill shape, the area is reduced, the air is in a jet shape, and the flow rate is improved. Axial fan, blast pipe, gas vent do not all have the noise elimination function, and current rotary kiln body cooling system mainly has following three problems:
1. the noise is large. At the air suction end of the axial flow fan, air flows in at a high speed to vibrate surrounding air to form air suction noise; the fan blades rotate at a high speed to drive air, and the blades rub the air violently to generate dynamic noise; turbulent flow is formed in air of the air pipe, and the vortex forms flow noise; the air reaches the duckbilled exhaust port, is sprayed into the atmosphere at a high speed and is blocked by the kiln body, and the atmosphere around the exhaust port is vibrated to generate air injection noise. The noise of each axial flow fan reaches more than 105 decibels under the combined action of the noise. The noise of 10-14 axial flow fans arranged on the rotary kiln body is mutually superposed and interfered in a sound field, so that the noise around the rotary kiln reaches more than 110 decibels.
2. The air cooling the kiln body is heated, reducing the cooling effect. The distance between the air inlet end of the axial flow fan and the air pipe duckbill-shaped exhaust port is less than 3 meters, the air sucked into the axial flow fan absorbs the radiant heat of the kiln body, and the temperature is increased; in addition, the air at the exhaust port is blocked by the kiln body and reflected, a part of the air is sucked into the axial flow fan, and the suction temperature is increased again. The heat of the kiln body taken away by the air cooling kiln body is in direct proportion to the temperature difference between the kiln body and the air, so that the temperature of the air is increased, the temperature difference is reduced, and the cooling effect is reduced.
3. The cooling area of the kiln body is small, the heat taken away by the air is small, and the utilization is insufficient. The process of cooling the kiln body by air is a heat supply process of transferring heat to the air by the kiln body, and the heat supply is in direct proportion to the heat supply area. The tail end of the existing air pipe is made into a duckbill shape, the heat supply area is small, the contact time of air and a kiln body is short, the heat absorption is insufficient, and the heat supply efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a rotary kiln body cooling system noise treatment device, mainly used reduces rotary kiln cooling system's noise pollution, improves cooling effect and cold air utilization ratio.
The purpose of the utility model is realized through the following technical scheme:
a noise treatment device of a rotary kiln body cooling system comprises a sound insulation cover, a silencing air inlet bin, a silencing air channel, a blower, a silencing chamber, a silencing adjusting bin and an air supply chamber;
the blower is arranged in the sound insulation cover, and the silencing air inlet bin is communicated with the sound insulation cover and used for fresh air to flow in;
the air feeder is communicated with the silencing chamber through a silencing air channel and used for feeding cooling air into the silencing chamber; the silencing chamber is communicated with the silencing adjusting bin, and the tail end of the silencing adjusting bin is provided with a gas supply chamber;
the air inlet end of the muffling chamber is transversely provided with an air distributor, the middle part of the muffling chamber is vertically provided with a plurality of sound absorbers, cooling air is uniformly dispersed after passing through the air distributor, is sent into a muffling adjusting bin along gaps among the sound absorbers, and is used for cooling the rotary kiln body through the air feeding chamber.
This scheme is through adopting a fan to carry out the air feed with traditional many fans, and keeps away from the rotary kiln body to the problem that the fan is close to the high cooling efficiency low of kiln body cooling air temperature among the prior art has been solved. Meanwhile, an air supply channel consisting of a silencing air pipe, a silencing chamber and a silencing adjusting air channel is designed, so that the noise is reduced.
Furthermore, the terminal surface of air feed chamber is loudspeaker form, compares with traditional duckbilled shape, and the heat transfer area of the air feed chamber of loudspeaker form and the rotary kiln body is bigger, can not form sharp-pointed sound simultaneously, reduces noise pollution, because its tubaeform makes the air current dispersion, and its velocity of flow reduces the contact time who has prolonged cold air and rotary kiln body to improve cooling efficiency.
Furthermore, the distance between every two adjacent sound absorbers is 200mm-250mm, and the thickness of each sound absorber is 80mm-100 mm.
Furthermore, the air distributor is a sieve plate provided with uniform sieve pores, and the sieve plate is used for uniformly distributing cold air in the air supply chamber.
Furthermore, the outer wall of the silencing adjusting bin is made of sound absorption materials, a plurality of silencing adjusting air channels are formed in the silencing adjusting bin in a separating mode through partition plates, and adjusting butterfly valves are arranged in each silencing adjusting air channel. Because in practical application, the rotary kiln is fired at high temperature, so that the problem that the internal insulating bricks of the rotary kiln fall off is caused, the local temperature is increased, and the cold air quantity can be adjusted locally by using the adjusting butterfly valve, thereby improving the utilization rate of cold air
Furthermore, the blower is a centrifugal fan, the rotating speed of the centrifugal fan is 500r/min, the exhaust air pressure of the centrifugal fan is 800pa-1000pa, and the noise of the centrifugal fan can be reduced to 80 decibels by adopting the parameters.
Furthermore, a plurality of splitter plates are arranged in the noise elimination air inlet bin, and the purpose of adopting the splitter plates is to reduce the entering air to form oscillation, so that the noise is reduced.
Furthermore, the silencing air inlet bin is communicated with the air feeder through a silencing pipeline.
Furthermore, the distance between the sound insulation cover and the rotary kiln body is more than 6m, and the distance has the advantages that the heat radiation heating of the rotary kiln body to cold air around the fan can be completely avoided, a larger temperature difference is formed, and the cooling effect is improved.
Further, the sound pressure level outside the sound insulation cover is below 73 decibels.
The utility model has the advantages that:
(1) the air supply mode is changed. A centrifugal blower with low rotation speed, low wind pressure, large wind quantity and low noise is used to replace original axial fans with high rotation speed and high noise, so as to control the noise from the source.
(2) The low-noise air transmission system is used for replacing the original high-noise air transmission system, and the low-noise system consisting of a silencing air pipe, a silencing chamber, a silencing adjusting air channel and a horn-shaped air supply chamber is used for replacing an air outlet pipe of the axial flow fan. The high-noise system without the silencing function formed by the horn-shaped air outlets reduces the noise of the gas transmission system.
(3) The silencing and regulating air duct has regulating device to regulate the amount of cooling air supplied to each section of the kiln body.
(4) The gas distributor is used to make the gas quantity of each part of the cooling section of the kiln body uniform.
(5) The air supply chamber with the special shape increases the heat exchange area, prolongs the heat exchange time, improves the heat exchange efficiency and removes the exhaust and injection noise of the terminal.
(6) The air inlet of the centrifugal blower is far away from the kiln body, and the sucked air is not influenced by the high temperature of the kiln body, so that the temperature of the air sucked into the system is reduced.
Drawings
FIG. 1 is a cross-sectional view of the main viewing angle of the present invention;
fig. 2 is a cross-sectional view of the side view of the present invention.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, a noise abatement device for a rotary kiln body cooling system comprises a sound insulation cover 200, a noise elimination air inlet bin 300, a noise elimination air duct 400, a blower 500, a noise elimination chamber 600, a noise elimination regulation bin 700 and an air supply chamber 800.
The blower 500 is a centrifugal blower, the rotating speed of the centrifugal blower is 500r/min, the exhaust air pressure of the centrifugal blower is 800pa-1000pa, and the working noise is below 80 decibels, the blower 500 is installed in the sound insulation cover 200, so that the noise is further reduced, the sound pressure level outside the sound insulation cover 200 is below 73 decibels, meanwhile, in order to reduce the air disturbance noise caused by the traditional blower during working, a noise elimination air inlet bin 300 is additionally arranged, the noise elimination air inlet bin 300 is communicated with the sound insulation cover 200 for fresh air inflow, and a plurality of flow dividing plates 301 are arranged in the noise elimination air inlet bin 300, so that the noise caused by the air disturbance is reduced, and the structure of the noise elimination air inlet bin can be referred to fig.
The blower 500 is communicated with the muffling chamber 600 through the muffling air duct 400 and is used for sending cooling air into the muffling chamber 600; the muffling chamber 600 is communicated with the muffling adjusting bin 700, the tail end of the muffling adjusting bin 700 is provided with a gas supply chamber 800, and the muffling air channel 400, the muffling chamber 600 and the muffling adjusting bin 700 are all made of sound-absorbing materials.
Referring to fig. 1 and 2, the sound-deadening chamber 600 is a rectangular parallelepiped cavity made of a sound-deadening material in the present embodiment, and may be designed as a cavity having other shapes as long as it is suitable for air circulation. An air distributor 601 and a sound absorber 602 are arranged in the rectangular hollow cavity, wherein the air distributor 601 is a sieve plate provided with uniform sieve pores. As shown in fig. 1, an air distributor 601 is transversely disposed at the upper air inlet end of the muffling chamber 600, a plurality of sound absorbers 602 are vertically disposed in the middle of the muffling chamber 600, that is, the air distributor 601 is horizontally disposed with the rectangular cavity, and the sound absorbers 602 are vertically disposed with the rectangular cavity, so that the cold air flows into the gap 603 of the sound absorbers 602 after passing through the air distributor 601. The specific flow direction is as follows: the cooling air is uniformly dispersed after passing through the air distributor 601, is sent into the noise elimination adjustment bin 700 along the gaps 603 between the sound absorbers 602, then passes through the air supply chamber 800 to be used for cooling the rotary kiln body 100, and in the process, the cooling air firstly fills the cavity below the air distributor 601, and enters the gaps 603 of the sound absorbers 602 through the sieve holes of the air distributor 601 after being filled.
The silencing adjusting bin 700 is in a long strip shape, the outer wall of the silencing adjusting bin 700 is made of sound-absorbing materials, a plurality of silencing adjusting air channels 702 are formed in the silencing adjusting bin 700 in a separated mode through partition plates 701, and adjusting butterfly valves 703 are arranged in each silencing adjusting air channel 702, so that cooling of different kiln body sections is met.
As a preferred embodiment, the end surface of the air supply chamber 800 is in a horn shape, the distribution of which is shown in fig. 2, and two side plates of the horn-shaped air supply chamber 800 are symmetrically arranged at two axial sides of the rotary kiln body 100 and cover the rotary kiln body 100 in a V shape, so that the heat exchange area is increased, the contact time of cold air and the rotary kiln body 100 is prolonged, the air flow rate is lower than 2m/s, the cooling efficiency is improved, and the air injection noise of the traditional duckbill-shaped nozzle is avoided.
As a preferred embodiment, the distance between two adjacent sound absorbers 602 is 200mm-250mm, the thickness of the sound absorbers 602 is 80mm-100mm, the silencing air inlet bin 300 is communicated with the blower 500 through a silencing pipeline 3-5, the distance between the sound insulation cover 200 and the rotary kiln body 100 is more than 6m, and the radiation heat absorbed by the air entering the blower is small; the hot air discharged from the supply chamber 800 cannot reach the suction port of the blower, so that the blower sucks in cold air in the atmosphere. The temperature difference between the cold air and the rotary kiln body 100 is large, and the cooling effect is good.
The foregoing is merely a preferred embodiment of the invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to limit the invention to other embodiments, and to various other combinations, modifications, and environments and may be modified within the scope of the inventive concept as described herein by the teachings or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (10)
1. A noise treatment device of a rotary kiln body cooling system is characterized by comprising a sound insulation cover (200), a silencing air inlet bin (300), a silencing air channel (400), a blower (500), a silencing chamber (600), a silencing adjusting bin (700) and an air supply chamber (800);
the blower (500) is arranged in the sound insulation cover (200), and the silencing air inlet bin (300) is communicated with the sound insulation cover (200) and used for fresh air to flow in;
the blower (500) is communicated with the silencing chamber (600) through a silencing air channel (400) and is used for sending cooling air into the silencing chamber (600); the silencing chamber (600) is communicated with the silencing adjusting bin (700), and the tail end of the silencing adjusting bin (700) is provided with a gas supply chamber (800);
the air inlet end on the muffling chamber (600) is transversely provided with an air distributor (601), the middle of the muffling chamber (600) is vertically provided with a plurality of sound absorbers (602), cooling air passes through the air distributor (601) and then is uniformly dispersed, and the cooling air is sent into a muffling adjusting bin (700) along gaps (603) among the sound absorbers (602) and then is used for cooling the rotary kiln body (100) through an air supply chamber (800).
2. The rotary kiln body cooling system noise abatement device of claim 1, wherein the end face of the gas supply chamber (800) is trumpet-shaped.
3. The noise abatement device of the rotary kiln body cooling system of claim 2, wherein the distance between two adjacent sound absorbers (602) is 200mm-250mm, and the thickness of the sound absorbers (602) is 80mm-100 mm.
4. The rotary kiln body cooling system noise abatement device of claim 1, wherein said gas distributor (601) is a screen plate with uniform screen holes.
5. The rotary kiln body cooling system noise abatement device of claim 1, wherein the outer wall of the noise elimination regulation bin (700) is made of sound absorption material, a plurality of noise elimination regulation air channels (702) are formed in the noise elimination regulation bin (700) by adopting partition plates (701) in a separating manner, and a regulation butterfly valve (703) is arranged in each noise elimination regulation air channel (702).
6. The rotary kiln body cooling system noise abatement device of claim 1, wherein the blower (500) is a centrifugal fan, the rotation speed thereof is 500r/min, and the exhaust air pressure thereof is 800pa-1000 pa.
7. The noise abatement device of the rotary kiln body cooling system of claim 1, wherein a plurality of splitter plates (301) are disposed in the muffling air inlet bin (300).
8. The rotary kiln body cooling system noise abatement device of claim 7, wherein the noise elimination air inlet bin (300) is communicated with the blower (500) through a noise elimination pipeline (3-5).
9. The noise abatement device of the rotary kiln body cooling system of claim 1, wherein the distance between the sound insulation cover (200) and the rotary kiln body (100) is more than 6 m.
10. The rotary kiln body cooling system noise abatement device of claim 1, wherein the sound pressure level outside the sound insulation cover (200) is below 73 decibels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921408447.7U CN210892664U (en) | 2019-08-28 | 2019-08-28 | Noise control device for rotary kiln body cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921408447.7U CN210892664U (en) | 2019-08-28 | 2019-08-28 | Noise control device for rotary kiln body cooling system |
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| Publication Number | Publication Date |
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| CN210892664U true CN210892664U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921408447.7U Expired - Fee Related CN210892664U (en) | 2019-08-28 | 2019-08-28 | Noise control device for rotary kiln body cooling system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847810A (en) * | 2021-10-11 | 2021-12-28 | 成都新仪征环保科技有限公司 | Low-noise air-cooled heat dissipation device |
| CN114111326A (en) * | 2021-10-28 | 2022-03-01 | 宁波源海博创科技有限公司 | Comprehensive noise reduction and heat recovery system for cement rotary kiln |
-
2019
- 2019-08-28 CN CN201921408447.7U patent/CN210892664U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847810A (en) * | 2021-10-11 | 2021-12-28 | 成都新仪征环保科技有限公司 | Low-noise air-cooled heat dissipation device |
| CN113847810B (en) * | 2021-10-11 | 2024-03-08 | 成都新仪征环保科技有限公司 | Low-noise air-cooled heat dissipation device |
| CN114111326A (en) * | 2021-10-28 | 2022-03-01 | 宁波源海博创科技有限公司 | Comprehensive noise reduction and heat recovery system for cement rotary kiln |
| CN114111326B (en) * | 2021-10-28 | 2023-12-15 | 宁波源海博创科技有限公司 | Cement rotary kiln comprehensive noise reduction and heat recovery system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200630 Termination date: 20210828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |