Novel steam pipeline purging silencer
By designing a new steam pipe purge and silence device, using the mirror-symmetrical arrangement of the intake manifold and spoiler, the problems of inconvenient installation and poor silence effect of traditional silencers are solved, and efficient noise reduction and safety are achieved Sex improvement.
Patent Information
- Application Number
- CN202421469983.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The traditional steam pipe purge muffler structure is inconvenient to install, has poor silence effect, and is prone to safety accidents under high temperature and high pressure conditions.
A new type of steam pipe purge and silence device is designed, adopting structures such as outer cylinder, open-hole inner cylinder, core cylinder and intake manifold. Through mirror-symmetrical arrangement of intake manifolds and spoilers, the design is designed. Achieve self-balancing and directional changes in airflow, thereby reducing impact and improving sound silence.
It effectively reduces the noise and impact force during the purge process, improves the silence effect, reduces the requirements for the silencer strength, reduces the construction cost and construction period, and improves the economy and safety of the unit.
Smart Images
Figure CN222503126U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of pipeline steam blowing in thermal power generation installation industry, and in particular to a novel steam pipeline blowing and silencing device. Background Art
[0002] Before starting up a new thermal power unit, if there are residual debris in the thermal pipeline, the startup time of the unit will be prolonged, and may cause the boiler superheater and reheater to burst or the turbine flow loss, which will seriously endanger the safety and economic operation of the unit. Therefore, steam purging is required to remove the debris inside the steam pipelines such as superheaters and reheaters to ensure the normal operation of the equipment, improve the operation quality of the system and the safety and stability of the unit. Steam purging can also be used to test and reflect some problems in installation and design. However, during the steam pipeline purging process, the noise and debris such as iron filings in the pipeline have a serious impact on the production and life of the surrounding personnel. By choosing a suitable silencer, the problems of noise and environmental pollution can be reduced.
[0003] There are two main forms of steam pipeline purge discharge in the construction of thermal power generation projects. One is the usual discharge method, that is, directly connecting a temporary pipe to the purge port of the steam pipeline, and then connecting a 45° upward elbow through the discharge port, without taking any muffler measures, resulting in a poor noise environment on site. The pipeline is affected by stress and impact during the purge process, and the thermal stress generated by heat is relatively complex. At the same time, due to the limitations of on-site layout conditions, temporary brackets are difficult to meet the requirements, which easily leads to safety accidents such as cracking and breaking of temporary pipes during the purge process. Another way is to add a muffler to reduce the noise generated during the purge. The purge of high-temperature and high-pressure steam pipeline systems will bring strong scouring force, which is difficult for ordinary muffler structures to meet the requirements, and the stress conditions are not suitable. When the steam purge volume is large, the muffler resistance increases sharply, affecting the effect and may even cause safety accidents. At the same time, due to the limitations of on-site conditions, the installation of finished mufflers is also very challenging and has certain disadvantages. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a novel steam pipeline purge silencer, which solves the technical problems of the traditional silencer structure being inconvenient to install and having poor silencer effect by optimizing and innovating the structure of the original silencer.
[0005] The technical solutions adopted by the utility model to solve the technical problems are as follows:
[0006] A novel steam pipe purging and silencer comprises an outer cylinder, and the novel steam pipe purging and vertical silencer comprises an inner cylinder with a hole, a core cylinder and an intake manifold, wherein the upper part of the outer cylinder is open and a supporting bottom plate is arranged at the bottom, the inner cylinder with a hole is located at the center of the middle and lower part of the outer cylinder, a conical baffle is arranged at the bottom of the inner cylinder with a hole, and a vertical supporting pipe is arranged between the conical baffle and the supporting bottom plate; the core cylinder is arranged at the center of the inner cylinder with a hole, a vertical partition is arranged at the center of the core cylinder, and a spoiler is arranged in the middle of the vertical partition; there are two intake manifolds, namely, intake manifold A and intake manifold B, and the intake manifold A and intake manifold B are arranged in mirror symmetry, and the side walls passing through the outer cylinder and the inner cylinder with a hole are respectively connected to the cylinder walls on both sides of the core cylinder; the intake manifold A and the intake manifold B both comprise steam inlet electric control valves and steam inlet pipe caliber change reducer interfaces.
[0007] The top of the core cylinder is evenly provided with top exhaust holes, and the bottom of the core cylinder is evenly provided with bottom exhaust holes. The vertical distance between the bottom exhaust holes of the core cylinder and the conical baffle is greater than 200 mm to ensure sufficient clearance.
[0008] The outer side of the outer cylinder is provided with a heat-insulating iron sheet, and a heat-insulating cotton layer is provided between the heat-insulating iron sheet and the outer cylinder wall of the outer cylinder to reduce noise.
[0009] Multiple rows of staggered silencer holes are evenly arranged on the side of the perforated inner cylinder; multiple rows of staggered silencer holes are also evenly arranged on the perforated plate at the top of the perforated inner cylinder.
[0010] Two lifting ears are symmetrically arranged on the outer cylinder wall of the outer cylinder.
[0011] A sewage outlet and a sewage pipe are arranged at the bottom of the conical baffle.
[0012] The working principle of the utility model is as follows:
[0013] During the purge operation, the high-temperature, high-pressure steam containing impurities passes through two symmetrical intake manifolds, and under the control of the steam inlet electric control valve, passes through the outer cylinder and the inner cylinder to enter the two sides of the muffler core cylinder. A partition is set in the middle of the core cylinder. Since the airflows on both sides are equal in size and opposite in direction, the horizontal impact force brought by the balanced horizontal high-speed airflow can be offset, so the core cylinder does not need to be fixed separately. Then, the high-temperature, high-pressure steam containing impurities changes the horizontal intake through the spoiler to be discharged from the top exhaust hole and the bottom exhaust hole at the same time. The gas discharged from the bottom exhaust hole impacts the conical baffle. At the same time, the vertical support pipe set under the conical baffle transmits the impact force to the bottom plate, making the entire muffler device more reliable. Some impurities can be discharged from the bottom sewage outlet and sewage pipe.
[0014] The positive and beneficial effects of the utility model are as follows:
[0015] The utility model is provided with two intake manifolds arranged in mirror symmetry, which is a force-bearing self-balancing structure. The airflows on both sides are equal in size and opposite in direction, so the horizontal impact force brought by the balanced horizontal high-speed airflow can be offset, and the strength requirements for the high-pressure steam purge silencer can be greatly reduced. This design changes the direction of the airflow by equal diameter, and uses the principle of resistive silencer to make the sound waves propagate forward to the supporting bottom plate and then reflect 180 degrees, so that the amplitudes of the waves are equal, the phases are opposite, and they interfere with each other, thereby achieving the most ideal silencer effect. Secondly, when the steam airflow passes through the silencer holes on the top and side of the open inner cylinder, the principles of throttling and pressure reduction and small hole injection are used to further reduce the noise of the airflow. When the steam airflow passes through the silencer holes from the inner cylinder to the outer cylinder, a second expansion and noise reduction is performed, and silencer cotton is set on the outer wall of the outer cylinder to further absorb the noise caused by the airflow impacting the outer cylinder, thereby improving the overall silencer effect.
[0016] The utility model is made of ordinary #20 steel, and each unit costs about 10,000 yuan, which is relatively low cost. The internal structure is professionally designed and easy to install. No special fixation is required. It only needs to keep the ground foundation of the silencer solid and the bottom plate firm.
[0017] The utility model is suitable for various construction site purging conditions, occupies a small area, is easy to transport, has the characteristics of large steam emission, low resistance, good silencing effect, etc., and is suitable for various types of steam purging.
[0018] The utility model can effectively reduce the number of purge times, improve the purge effect, save construction costs, shorten the construction period and commissioning period, and increase the economy of the unit. The application of the utility model will help promote the development of the power industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of the utility model;
[0020] Figure 2 for Figure 1 A schematic diagram of the sound-absorbing hole of the developed surface of the inner cylinder with a central opening;
[0021] In the figure: 1--insulating iron sheet, 2--insulating sound-absorbing cotton, 3--outer cylinder, 4--lifting ear, 5--perforated top plate, 6--perforated inner cylinder, 7--top exhaust hole, 8--core cylinder, 9--steam inlet electric control valve, 10--steam inlet pipe diameter change reducer, 11--bottom sewage pipe, 12--vertical partition, 13--spoiler, 14--conical baffle, 15--vertical support pipe, 16--support bottom plate, 17--bottom exhaust hole. DETAILED DESCRIPTION
[0022] The present invention will be further explained and illustrated below in conjunction with the accompanying drawings and embodiments:
[0023] Examples, see Figure 1 and Figure 2 A novel steam pipeline purge silencer comprises an outer cylinder 3, an inner cylinder 6 with a hole, a core cylinder 8 and an intake manifold. The upper part of the outer cylinder 3 is open, and a supporting bottom plate 16 is arranged at the bottom. The inner cylinder 6 with a hole is located at the center of the lower middle part of the outer cylinder 3. A conical baffle 14 is arranged at the bottom of the inner cylinder 6 with a hole, and a vertical supporting pipe 15 is arranged between the conical baffle 14 and the supporting bottom plate 16. The core cylinder 8 is arranged at the center of the inner cylinder 6 with a hole. An upright partition 12 is arranged at the center position inside the core cylinder 8, and a spoiler 13 is arranged in the middle position of the upright partition 12; there are two intake manifolds, namely intake manifold A and intake manifold B, and intake manifold A and intake manifold B are arranged in mirror symmetry, passing through the side walls of the outer cylinder and the open inner cylinder and connected with the cylinder walls on both sides of the core cylinder 8 respectively; intake manifold A and intake manifold B both include a steam intake electric control valve 9 and a steam intake pipe diameter change reducer interface 10.
[0024] Top exhaust holes 7 are evenly arranged at the top of the core cylinder 8, and bottom exhaust holes 17 are evenly arranged at the bottom of the core cylinder 8. The vertical distance between the bottom exhaust holes 17 and the conical baffle 14 is greater than 200 mm.
[0025] A heat-insulating iron sheet 1 is arranged on the outside of the outer cylinder body 3 , and a heat-insulating sound-absorbing cotton 2 is arranged between the heat-insulating iron sheet 1 and the outer cylinder wall of the outer cylinder body 3 .
[0026] Multiple rows of staggered silencer holes are evenly arranged on the side of the opening inner cylinder 6; multiple rows of staggered silencer holes are also evenly arranged on the opening top plate 5 at the top of the opening inner cylinder 6.
[0027] Two lifting ears 4 are symmetrically arranged on the outer cylinder wall of the outer cylinder body 3 .
[0028] A sewage outlet and a sewage pipe 11 are provided at the bottom of the conical baffle 14 .
[0029] When the utility model performs a purging operation, the high-temperature, high-pressure steam containing impurities passes through the symmetrical intake manifold A and intake manifold B, and under the control of the steam inlet electric control valve 9, passes through the outer cylinder 3 and the inner cylinder 6 to enter the two sides of the muffler core cylinder 8. A partition 12 is arranged in the middle of the core cylinder 8. Since the airflows on both sides are equal in size and opposite in direction, the horizontal impact force brought by the balanced horizontal high-speed airflow can be offset, so the core cylinder 8 does not need to be fixed separately. Then, the high-temperature, high-pressure steam containing impurities changes the horizontal air intake through the spoiler 13 to be discharged from the top exhaust hole 7 and the bottom exhaust hole 17 at the same time. The gas discharged from the bottom exhaust 17 impacts the conical baffle 14. At the same time, the vertical support pipe 15 arranged under the conical baffle 14 transmits the impact force to the support bottom plate 16, making the entire muffler device more reliable. The impurities can be discharged from the bottom sewage pipe 11.
[0030] The utility model is provided with two intake manifolds A and B arranged in mirror symmetry, which are self-balancing structures under load. The airflows on both sides are equal in size and opposite in direction, so the horizontal impact force brought by the balanced horizontal high-speed airflow can be offset, and the strength requirements for the high-pressure steam purge silencer can be greatly reduced. This design changes the direction of the airflow by equal diameter, and uses the principle of resistance silencing to make the sound waves propagate forward to the supporting bottom plate and then reflect 180 degrees, so that the amplitudes of the waves are equal, the phases are opposite, and they interfere with each other, thereby achieving the most ideal silencing effect. Secondly, when the steam airflow passes through the silencing holes on the top and side surfaces of the perforated inner cylinder 6, the principles of throttling pressure reduction and small hole injection are used to further reduce the noise of the airflow. When the steam airflow passes through the silencing holes and enters the outer cylinder 3 from the perforated inner cylinder 6, a second expansion and noise reduction is performed, and a heat-insulating silencing cotton 2 is set on the outer wall of the outer cylinder 3 to further absorb the noise caused by the airflow impacting the outer cylinder, thereby improving the overall silencing effect of the utility model.
[0031] The utility model is made of ordinary #20 steel, and each unit costs about 10,000 yuan, which is relatively low cost. The internal structure is professionally designed and easy to install. No special fixation is required. It only requires that the ground foundation of the silencer be compacted and the supporting bottom plate be firm.
[0032] The utility model is suitable for various construction site purging conditions, occupies a small area, is easy to transport, has the characteristics of large steam emission, low resistance, good silencing effect, etc., and is suitable for various types of steam purging.
[0033] The utility model can effectively reduce the number of purge times, improve the purge effect, save construction costs, shorten the construction period and commissioning period, and increase the economy of the unit. The application of the utility model will help promote the development of the power industry.
[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A novel steam pipeline purge silencer, comprising an outer cylinder (3), characterized in that: The novel steam pipeline purge vertical silencer device also includes an open-hole inner cylinder (6), a core cylinder (8) and an intake manifold; the upper portion of the outer cylinder (3) is open, and a supporting bottom plate (16) is provided at the bottom; the open-hole inner cylinder (6) is located at the center of the lower middle portion of the outer cylinder (3); a conical baffle (14) is provided at the bottom of the open-hole inner cylinder (6); a vertical support pipe (15) is provided between the conical baffle (14) and the supporting bottom plate (16); the core cylinder (8) is provided at the center of the open-hole inner cylinder (6); A vertical partition (12) is arranged at the center position of the core cylinder (8), and a spoiler (13) is arranged in the middle position of the vertical partition (12); there are two intake manifolds, namely, intake manifold A and intake manifold B, and the intake manifold A and intake manifold B are arranged in a mirror-symmetrical manner, and pass through the side walls of the outer cylinder (3) and the perforated inner cylinder (6) and are respectively connected to the cylinder walls on both sides of the core cylinder (8); the intake manifold A and the intake manifold B both include a steam intake electric control valve (9) and a steam intake pipeline caliber change reducer interface (10).
2. The novel steam pipeline purge silencing device according to claim 1 is characterized in that: The top of the core cylinder (8) is evenly provided with top exhaust holes (7), and the bottom of the core cylinder (8) is evenly provided with bottom exhaust holes (17), and the vertical distance between the bottom exhaust holes (17) and the conical baffle (14) is greater than 200 mm.
3. The novel steam pipeline purge silencing device according to claim 1 is characterized in that: A heat-insulating iron sheet (1) is provided on the outside of the outer cylinder (3), and heat-insulating sound-absorbing cotton (2) is provided between the heat-insulating iron sheet (1) and the outer cylinder wall of the outer cylinder (3).
4. The novel steam pipeline purge silencing device according to claim 1 is characterized in that: The side surface of the perforated inner cylinder (6) is evenly provided with multiple rows of staggered silencer holes; the perforated top plate (5) at the top of the perforated inner cylinder (6) is also evenly provided with multiple rows of staggered silencer holes.
5. The novel steam pipeline purge silencing device according to claim 1 is characterized in that: Two lifting ears (4) are symmetrically arranged on the outer cylinder wall of the outer cylinder (3).
6. The novel steam pipeline purge silencing device according to claim 1 is characterized in that: A sewage outlet and a sewage discharge pipe (11) are provided at the bottom of the conical baffle (14).