阅读说明：本技术 一种天然气焚烧塔排气管消音装置及其安装方法 (Natural gas incineration tower exhaust pipe silencing device and installation method thereof ) 是由 沈思捷 于 2021-06-25 设计创作，主要内容包括：本发明公开了一种天然气焚烧塔排气管消音装置及其安装方法,所述消音装置包括设置在排气管内的消音组件、设置在消音组件顶部的支撑架以及安装在甲板面上的甲板支撑,所述消音组件包括整流支撑筒和反射消音片组,所述整流支撑筒设置有多个,多个整流支撑筒设置在排气管内并从内往外依次套设,相邻两个整流支撑筒之间的间隙内和最外层的整流支撑筒与排气管之间的间隙内均沿气流方向设置有多组反射消音片组。本发明可使排气管内的大部分声波在到达排气管末端时在消音组件内进行数次反射衰减,能有效降低天然气焚烧塔排气管末端发散到大气中的噪音。(The invention discloses a silencer for an exhaust pipe of a natural gas incineration tower and an installation method thereof, wherein the silencer comprises a silencing component arranged in the exhaust pipe, a support frame arranged at the top of the silencing component and a deck support arranged on a deck surface, the silencing component comprises a plurality of rectifying support cylinders and a plurality of reflecting silencing sheet groups, the rectifying support cylinders are arranged in the exhaust pipe and are sequentially sleeved from inside to outside, and a plurality of groups of reflecting silencing sheet groups are arranged in gaps between two adjacent rectifying support cylinders and gaps between the outermost rectifying support cylinder and the exhaust pipe along the airflow direction. The invention can make most of sound waves in the exhaust pipe reflected and attenuated for a plurality of times in the silencing component when reaching the tail end of the exhaust pipe, and can effectively reduce the noise emitted to the atmosphere from the tail end of the exhaust pipe of the natural gas incineration tower.)

1. A natural gas incineration tower exhaust pipe silencing device is characterized by comprising a silencing component arranged in an exhaust pipe, a support frame arranged at the top of the silencing component and a deck support which is arranged on a deck surface and is not in contact with the outer wall of the exhaust pipe, wherein the end part of the support frame is fixed with the top of the deck support,

the silencing assembly comprises a plurality of rectifying supporting cylinders and a plurality of reflecting silencing sheet groups, the rectifying supporting cylinders are arranged in the exhaust pipe and are sequentially sleeved from inside to outside, and a plurality of reflecting silencing sheet groups used for reflecting sound waves are arranged in gaps between every two adjacent rectifying supporting cylinders and gaps between the outermost rectifying supporting cylinders and the exhaust pipe along the air flow direction.

2. The natural gas incineration tower exhaust pipe silencing device according to claim 1, wherein the reflection silencing plate group comprises a silencing plate arranged in a radial direction, and sound reflection plates arranged on two sides of the silencing plate and parallel to the silencing plate, and a plurality of sound transmission holes are formed in the sound reflection plates.

3. The natural gas incineration tower exhaust pipe silencing device according to claim 2, wherein the distance between the silencing plate and the sound wave reflection plate is 2-5 times of the diameter of the sound transmission hole.

4. The natural gas burning tower exhaust pipe silencing device of claim 1, wherein the support frame is a cross-shaped structure, and the end part of the support frame extends out from the outer edge of the exhaust pipe so as to be welded and fixed with the top of the deck support.

5. The natural gas incineration tower exhaust pipe silencing device according to claim 1, wherein the rectifying support cylinders are coaxially arranged in each layer and have axes coincident with the axis of the exhaust pipe.

6. The natural gas burning tower exhaust pipe silencing device of claim 5, wherein the distance between two adjacent layers of rectifying support cylinders is 1/10 of the height of the whole layer of support cylinder.

7. The natural gas burning tower exhaust pipe silencing device according to claim 1, wherein the deck surface is a deck surface at an outlet of the natural gas burning tower.

8. The installation method of the natural gas incineration tower exhaust pipe silencing device is characterized by comprising the following steps:

s1, sequentially sleeving a plurality of rectification support cylinders from inside to outside;

s2, welding and fixing a plurality of groups of reflection silencing sheet groups in the gap between two adjacent rectification support cylinders and on the outer surface of the rectification support cylinder at the outermost layer, wherein the reflection silencing sheet groups of each layer are radially arranged and are equidistantly distributed in the circumferential direction to form a silencing assembly;

s3, welding and fixing the support frame on the top of the silencing assembly, wherein the center of the support frame is positioned on the axis of the rectifying support cylinder;

s4, welding and fixing a plurality of deck supports on the deck surface at the periphery of the exhaust pipe;

s5, hoisting the assembly of the support frame and the silencing component into the exhaust pipe from the top of the exhaust pipe until the end of the support frame is lapped on the deck support;

and S6, welding and fixing the support frame and the deck support.

Technical Field

The invention relates to the technical field of ship construction, in particular to a natural gas incineration tower exhaust pipe silencing device and an installation method thereof.

Background

In large ships carrying LNG or partially using LNG fuel, a natural gas burning tower (GCU) is an important surplus volatile gas treatment device for consuming surplus natural gas through combustion. Because of the large amount of excess volatile gas in large LNG transportation or LNG powered ships, natural gas burning towers are usually equipped with fans with large capacity for supplying combustion air and cooling air in order to ensure sufficient combustion. Huge amount of wind is through irregular parts such as combustor when through burning tower and blast pipe, and the vortex street of production can cause aerodynamic's noise, and the mechanical noise of fan itself also can disperse to exterior space through the blast pipe.

In recent years, LNG ships for applications other than pure transportation, such as FSRU (floating storage regasification unit) for supplying gas to land while being parked on shore, or LNG tankers for fueling large LNG-powered ships, have been increasing. Such vessels are often operated at low points near areas of dense personnel, such as a shore station near a populated area, or a cruise ship terminal where a large number of visitors are gathered. Based on the situation, the region where the ship operates and part of the regulation establishment organizations begin to set corresponding regulations on the influence of the ship on the surrounding environment, particularly emission and noise requirements, and the control of the natural gas incineration tower as a main noise source exposed outside (the burnt exhaust gas needs to be directly exhausted into the atmosphere) also becomes a required action.

Disclosure of Invention

In view of the above, the invention provides a silencer for an exhaust pipe of a natural gas burning tower and an installation method thereof, which can effectively reduce noise emitted to the atmosphere from the tail end of the exhaust pipe of the natural gas burning tower, and meanwhile, gas circulation in normal operation of the natural gas burning tower cannot be influenced.

A natural gas incineration tower exhaust pipe silencing device comprises a silencing component arranged in an exhaust pipe, a support frame arranged at the top of the silencing component and a deck support which is arranged on a deck surface and is not in contact with the outer wall of the exhaust pipe, wherein the end part of the support frame is fixed with the top of the deck support,

the silencing assembly comprises a plurality of rectifying supporting cylinders and a plurality of reflecting silencing sheet groups, the rectifying supporting cylinders are arranged in the exhaust pipe and are sequentially sleeved from inside to outside, and a plurality of reflecting silencing sheet groups used for absorbing the reflected sound waves are arranged in gaps between every two adjacent rectifying supporting cylinders and gaps between the outermost rectifying supporting cylinders and the exhaust pipe along the air flow direction.

Preferably, the reflection silencing sheet set comprises a silencing sheet arranged in the radial direction and sound reflection plates arranged on two sides of the silencing sheet and parallel to the silencing sheet, and a plurality of sound transmission holes are formed in the sound reflection plates.

Preferably, the distance between the sound-absorbing plate and the sound wave reflection plate is 2-5 times of the aperture of the sound transmission hole.

Preferably, the support frame is of a cross-shaped structure, and the end part of the support frame extends out of the outer edge of the exhaust pipe so as to be welded and fixed with the top of the deck support.

Preferably, each layer of rectifying and supporting cylinder is coaxially arranged, and the axis of each layer of rectifying and supporting cylinder coincides with the axis of the exhaust pipe.

Preferably, the distance between two adjacent layers of rectifying support cylinders is 1/10 the height of the whole layer of support cylinder.

Preferably, the deck surface is the deck surface at the outlet of the natural gas incineration tower.

A mounting method of a natural gas incineration tower exhaust pipe silencing device specifically comprises the following steps:

s1, sequentially sleeving a plurality of rectification support cylinders from inside to outside;

s2, welding and fixing a plurality of groups of reflection silencing sheet groups in the gap between two adjacent rectification support cylinders and on the outer surface of the rectification support cylinder at the outermost layer, wherein the reflection silencing sheet groups of each layer are radially arranged and are equidistantly distributed in the circumferential direction to form a silencing assembly;

s3, welding and fixing the support frame on the top of the silencing assembly, wherein the center of the support frame is positioned on the axis of the rectifying support cylinder;

s4, welding and fixing a plurality of deck supports on the deck surface at the periphery of the exhaust pipe;

s5, hoisting the assembly of the support frame and the silencing component into the exhaust pipe from the top of the exhaust pipe until the end of the support frame is lapped on the deck support;

and S6, welding and fixing the support frame and the deck support.

The invention has the beneficial effects that:

1. through installing amortization subassembly in the exhaust pipe, can make most sound wave in the exhaust pipe carry out the reflection attenuation several times in amortization subassembly when reaching the exhaust pipe end, can effectively reduce the noise that natural gas burns tower exhaust pipe end and disperse to the atmosphere.

2. Because each group of reflection silencing plate groups are arranged in the radial direction, the cross section area is very small, the airflow obstruction during the operation of the incineration tower is small, the airflow circulation is not influenced, and the full combustion of natural gas in the combustion cavity of the incineration tower is effectively ensured.

3. The sound wave reflecting plate can play a certain role of preventing fire stars, flame which is not combusted is prevented from overflowing to a certain extent, and the safety of the exhaust system is improved. Meanwhile, the whole silencing device is not rigidly connected with the exhaust pipe, and the design of the exhaust pipe of the conventional natural gas incineration tower does not need to be modified.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of the connection of the muffler assembly to the support bracket.

FIG. 2 is a schematic view of the assembly of the muffler assembly and the support bracket being suspended in the exhaust pipe.

Fig. 3 is a schematic view of the structure of the silencer of the present invention.

Fig. 4 is a schematic structural view of a group of reflection silencing sheets.

Fig. 5 is a top view of the muffler device of the present invention.

Fig. 6 is a schematic view of reflection attenuation of an acoustic wave.

FIG. 7 is a schematic view of the installation of the silencer of the present invention.

The reference numerals in the figures have the meaning:

the device comprises a support frame 1, a reflection silencing sheet group 2, a rectification support cylinder 3, an exhaust pipe 4, a deck support 5, a deck surface 6, a silencing plate 7, a sound wave reflection plate 8, a sound transmission hole 9, a silencing device 10 and an incineration tower 11.

Detailed Description

For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.

It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

The invention provides a silencing device for an exhaust pipe of a natural gas incineration tower, which comprises a silencing component arranged in an exhaust pipe 4, a support frame 1 arranged at the top of the silencing component and a deck support 5 which is arranged on a deck surface 6 and is not in contact with the outer wall of the exhaust pipe 4, wherein the end part of the support frame 1 is fixed with the top of the deck support 5. The deck surface 6 is the deck surface at the outlet of the natural gas incineration tower 11.

The amortization subassembly includes a rectification support section of thick bamboo 3 and reflection amortization piece group 2, a rectification support section of thick bamboo 3 is provided with a plurality ofly, and a plurality of rectification support section of thick bamboos 3 set up in blast pipe 4 and from interior toward outer cover in proper order and establish, and the coaxial setting of each layer rectification support section of thick bamboo 3 and its axis coincide mutually with the axis of blast pipe 4.

A plurality of groups of reflection silencing sheet groups 2 for absorbing reflection sound waves are arranged in the gap between every two adjacent rectification support cylinders and the gap between the outermost rectification support cylinder and the exhaust pipe along the air flow direction, and the plurality of groups of reflection silencing sheet groups 2 on the same layer are uniformly distributed in the circumferential direction. Specifically, the distance between two adjacent (inner and outer) rectifying support cylinders 3 is 1/10 of the height of the rectifying support cylinder 3, and the distance between two adjacent reflecting silencer groups 2 on the same layer is equal to the distance between the inner and outer rectifying support cylinders 3.

The reflection silencing sheet set 2 comprises a silencing sheet 7 arranged in the radial direction and sound reflection plates 8 which are arranged on two sides of the silencing sheet 7 and parallel to the silencing sheet 7, and a plurality of sound transmission holes 9 are formed in the sound reflection plates 8. The distance between the sound-absorbing plate 7 and the sound-reflecting plate 8 is 2-5 times of the aperture of the sound-transmitting hole 9.

The rectifying support cylinder 3, the reflecting silencing sheet groups 2 and the support frame 1 jointly form a silencing main body, and when gas in the exhaust pipe 4 flows from bottom to top, generated sound waves can impact the wall surfaces of the cavities separated by the reflecting silencing sheet groups 2 and are reflected on the wall surfaces. After each reflection, a part of sound wave enters the corresponding sound-absorbing plate 7 through the sound-transmitting holes on the sound-absorbing reflection plates 8, the sound-absorbing plate 7 sandwiched between the two sound-absorbing reflection plates 8 absorbs part of the energy, and the unabsorbed part of the energy is attenuated and then enters the cavity separated by each reflection sound-absorbing plate group 2 again for the next reflection. Because the height of whole amortization subassembly is higher, most sound wave all can have several reflection attenuations when reaching blast pipe 4 terminal, consequently, can greatly reduced the noise level of blast pipe 4 exit.

Meanwhile, as each group of reflection silencing sheet groups 2 are arranged in the radial direction and have small cross sectional area, the airflow obstruction during the operation of the incineration tower 11 is small, the airflow circulation cannot be influenced, and the full combustion of natural gas in the combustion cavity of the incineration tower 11 is effectively ensured.

The installation method of the natural gas incineration tower exhaust pipe silencing device specifically comprises the following steps:

and S1, sequentially sleeving the plurality of rectifying support cylinders 3 from inside to outside.

And S2, welding and fixing a plurality of groups of reflection silencing sheet groups 2 on the outer surfaces of the outermost rectifying support cylinders in the gaps between two adjacent rectifying support cylinders, wherein the reflection silencing sheet groups 2 of each layer are radially arranged and are distributed at equal intervals in the circumferential direction to form a silencing assembly.

And S3, welding and fixing the support frame 1 at the top of the silencing assembly, wherein the center of the support frame 1 is positioned on the axis of the rectifying support cylinder 3.

And S4, welding and fixing a plurality of deck supports 5 on the deck surface 6 at the periphery of the exhaust pipe 4, wherein the deck supports 5 are not in contact with the outer surface of the exhaust pipe 4.

And S5, hoisting the assembly of the support frame 1 and the silencing component into the exhaust pipe 4 from the top of the exhaust pipe 4. In this embodiment, the support frame 1 is a cross structure, and when the assembly of the support frame 1 and the silencing component is hoisted into the exhaust pipe 4, the end of the support frame 1 just extends out from the outer edge of the exhaust pipe 4 and is placed on the deck support 5.

And S6, welding and fixing the end part of the support frame 1 and the top part of the deck support 5 to form a complete silencer. The utility model provides a silencing device supports 5 through the deck of welding on deck face 6 and carries out rigid connection with the deck, and this silencing device does not have rigid connection with blast pipe 4 itself, need not to make any modification to the design of blast pipe 4 of conventional natural gas burning tower.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.