CN112984042A - Vibration reduction device and method for coal gasifier downcomer - Google Patents
Vibration reduction device and method for coal gasifier downcomer Download PDFInfo
- Publication number
- CN112984042A CN112984042A CN202110250969.4A CN202110250969A CN112984042A CN 112984042 A CN112984042 A CN 112984042A CN 202110250969 A CN202110250969 A CN 202110250969A CN 112984042 A CN112984042 A CN 112984042A
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- Prior art keywords
- downcomer
- fixedly connected
- box body
- coal gasifier
- baffle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a vibration damper and a method for a coal gasifier downcomer, wherein the device comprises a base plate, a guide rod, an upper baffle, a box body, a lower baffle and an energy consumption spring, wherein one end of the guide rod is fixedly connected with the base plate, and the other end of the guide rod is fixedly connected with the upper baffle; the upper baffle is embedded in the box body, a guide rail is further arranged in the box body, and the upper baffle can move along the guide rail; one end of the energy dissipation spring is fixedly connected with the upper baffle, and the other end of the energy dissipation spring is fixedly connected with the lower baffle; the lower baffle is arranged outside the box body and is fixedly connected with the box body. The invention effectively reduces the stress at the joint of the down pipe of the gasification furnace and the chilling ring; the risk of cracking and fatigue failure at the root joint of the gasifier downcomer is reduced.
Description
Technical Field
The invention relates to the technical field of coal chemical industry, in particular to a vibration reduction device and method for a coal gasifier downcomer.
Background
The coal gasifier is key equipment for preparing synthetic coal gas in a chemical system taking coal as energy and an IGCC power generation device. The down pipe is one of the components in the coal gasifier quench chamber, the high-temperature synthesis gas generated by the combustion chamber enters the quench chamber liquid pool through the down pipe to finish the preliminary cooling, dedusting and humidifying, and the flow field of the down pipe comprises strong turbulence of gas-liquid-solid three-phase coupling flow. Meanwhile, the upper end of the down pipe is welded and fixed with the chilling ring, the down pipe is a cantilever beam-like non-statically determinate structure, and flow-induced vibration is easily generated under the action of flow field force. The stress of the root part is increased due to the vibration of the downcomer, and meanwhile, the fatigue damage of the joint is caused by the alternating load generated by the vibration, so that the sealing failure and even the cracking of the joint are caused. The vibration of the down pipe can also influence the distribution condition of the internally-avoided chilling water, influence the chilling effect and even cause the ablation of the down pipe.
At present, when the vibration problem of the downcomer is solved, the steel cable is mainly directly connected with the furnace body to increase the free end for fixing, but the steel cable is broken and fails due to vibration during actual maintenance, the vibration reduction effect is poor, and the stress concentration of the furnace body and the downcomer is easily caused. The damper is an energy-consuming and vibration-damping device, and is widely applied to the industries of aerospace, aviation, war industry, guns, automobiles, buildings and the like. But the working condition of the down pipe of the gasification furnace has the characteristics of high temperature, easy corrosion, abrasion, ablation and the like, and the traditional damper cannot be directly applied to satisfy the long-period stable operation.
Therefore, the prior art needs a technical scheme for reducing the vibration of the downcomer suitable for the severe working conditions of the coal gasifier.
Disclosure of Invention
In view of the above problems, the present invention provides a vibration damping device and method for a downcomer of a coal gasifier.
The technical scheme of the invention is as follows:
a vibration damper for a coal gasifier downcomer comprises a base plate, a guide rod, an upper baffle, a box body, a lower baffle and an energy consumption spring, wherein one end of the guide rod is fixedly connected with the base plate, and the other end of the guide rod is fixedly connected with the upper baffle; the upper baffle is embedded in the box body, a guide rail is further arranged in the box body, and the upper baffle can move along the guide rail; one end of the energy dissipation spring is fixedly connected with the upper baffle, and the other end of the energy dissipation spring is fixedly connected with the lower baffle; the lower baffle is arranged outside the box body and is fixedly connected with the box body.
The lower baffle plate is fixedly connected with the box body through a connecting bolt or a clamp.
The guide rail is in one of a triangular shape, a rectangular shape, a trapezoidal shape, a semicircular shape and an arc shape.
The cross section of the guide rod is in one of a circular shape, an annular shape, a rectangular shape, a square shape, an I-shaped shape, an angular shape and a groove shape.
The contact surface of the base plate and the gasifier downcomer is a curved surface or a plane, and the contact surface of the lower baffle and the support ring of the bubble breaking bed is a curved surface or a plane.
A method for damping vibration of a coal gasifier downcomer, comprising the steps of:
s1: embedding the upper baffle into the box body, enabling the upper baffle to move along the guide rail, and then sequentially connecting the base plate, the guide rod and the upper baffle;
s2: fixedly connecting two ends of the energy dissipation spring with the upper baffle and the lower baffle, and then closing and fixedly connecting the lower baffle with the tail end of the box body, namely assembling the damping device for the coal gasifier downcomer;
s3: the vibration damper for the coal gasifier downcomer is fixed on the bubble breaking bed support ring, the base plate is fixedly connected with the gasifier downcomer, and the lower baffle is fixedly connected with the bubble breaking bed support ring, so that vibration damping is realized.
The two damping devices for the coal gasifier downcomer are arranged and form an included angle of 90 degrees with each other.
3-12 damping devices for the coal gasifier downcomer are installed and evenly arranged along the circumference of the bubble breaking bed support ring.
The base plate is fixedly connected with the gasifier downcomer through welding, bonding, clamping, riveting or bolts, and the lower baffle is connected with the bubble breaking bed support ring through welding, bonding, clamping, riveting or bolts.
The support ring of the foam breaking bed, the lower baffle and the box body are fixedly connected through connecting bolts.
Compared with the prior art, the invention has the beneficial effects that:
1. the compression and stretching processes of the energy consumption spring can consume part of vibration energy, so that the problem of overlarge amplitude caused by the flow vibration of the gasifier downcomer is solved, the vibration response is reduced while the radial support is increased, and the stress at the connection part of the gasifier downcomer and the chilling ring is effectively reduced; the risk of cracking and fatigue failure at the root joint of the gasifier downcomer is reduced.
2. The energy dissipation spring is assembled inside the box body, so that the damages such as corrosion, abrasion and the like of media in a chilling chamber of the coal gasifier can be effectively avoided, and the long-period operation of the device is ensured.
3. The contact design of the vibration damper and the descending pipe and the bubble breaking bed support ring is surface contact, so that the descending pipe and the bubble breaking bed of the gasification furnace can be prevented from being damaged by stress concentration.
4. Each part is detachable structure, the whole structure is assembled, the assembly with other parts in the coal gasifier is simple, the processes of installation, maintenance, replacement and the like can be conveniently completed in a chilling chamber, the use of the descending pipes of the gasifiers with different specifications is met, and the safe operation period of the equipment is prolonged.
5. The rigidity of the energy dissipation spring is changed by changing the material and the structural parameters of the energy dissipation spring; the curvature of the curved surface of the contact surface of the base plate and the downcomer, and the curved surface of the contact surface of the lower baffle and the bubble breaking bed support ring are changed, so that the vibration reduction device can meet the requirements of vibration reduction of downcomers of gasification furnaces of different specifications.
Drawings
Fig. 1 is a schematic structural view of a vibration damping device.
Fig. 2 is a schematic view of the internal assembly of the vibration damping device.
FIG. 3 is a schematic view of the installation of the vibration damping device with the bubble-breaking bed support ring and the downcomer.
Fig. 4 is a use state diagram of the orthogonal arrangement of the vibration damping device.
Fig. 5 is a diagram of a state of use in which the vibration damping devices are uniformly arranged.
Reference numerals: 1-backing plate, 2-guide rod, 3-upper baffle, 4-box, 5-bolt, 6-lower baffle, 7-energy dissipation spring, 8-gasifier downcomer, 9-bubble breaking bed support ring and 10-guide rail.
Detailed Description
The present invention will be described with reference to specific examples.
As shown in fig. 1-5, the vibration damper for the down pipe of the coal gasifier comprises a base plate 1, a guide rod 2, an upper baffle 3, a box body 4, a lower baffle 6 and an energy dissipation spring 7, wherein one end of the guide rod 2 is fixedly connected with the base plate 1, and the other end is fixedly connected with the upper baffle 3; the cross section of the guide rod 2 is one of circular, annular, rectangular, square, I-shaped, angular and groove-shaped, and in the embodiment, the cross section is square.
The upper baffle 3 is embedded in the box body 4, a guide rail 10 is also arranged in the box body 4, and the upper baffle 3 can move along the guide rail 10; the guide rail 10 is one of a triangular shape, a rectangular shape, a trapezoidal shape, a semicircular shape, and an arc shape, and is a rectangular shape in the present embodiment.
One end of the energy dissipation spring 7 is fixedly connected with the upper baffle 3, and the other end of the energy dissipation spring is fixedly connected with the lower baffle 6; the energy dissipation spring 7 and the upper baffle 3 are jointly assembled in the box body 4, the box body 4 can prevent corrosive media in a coal gasifier chilling chamber from directly contacting with the energy dissipation spring to cause damage, and meanwhile possible hazards such as abrasion, accumulation and blockage of ash particles in the media can be avoided.
The lower baffle 6 is arranged outside the box body 4 and is fixedly connected with the box body 4. The lower baffle 6 is fixedly connected with the box body 4 through a connecting bolt 5 or a clip, and the connecting bolt 5 is adopted in the embodiment.
The contact surface of the base plate 1 and the gasifier downcomer 8 is a curved surface or a plane, the contact surface of the lower baffle 6 and the bubble breaking bed support ring 9 is a curved surface or a plane, and both the contact surfaces are curved surfaces in the embodiment.
A method for damping vibration of a coal gasifier downcomer, comprising the steps of:
s1: embedding an upper baffle 3 into a box body 4, enabling the upper baffle 3 to move along a guide rail 10, and then sequentially connecting a base plate 1, a guide rod 2 and the upper baffle 3; in this embodiment, the cross-section of the support ring 9 of the bubble breaking bed is L-shaped, the short side is used for connecting the bubble breaking strip, the long side is processed with a boss for fixing the vibration damper, the boss is rectangular, the cross-section of the support ring 9 of the bubble breaking bed can be equal in length on both sides, and both can be designed according to specific requirements.
S2: and two ends of the energy dissipation spring 7 are fixedly connected with the upper baffle 3 and the lower baffle 6, and then the lower baffle 6 is closed and fixedly connected with the tail end of the box body 4, namely the damping device for the coal gasifier downcomer is assembled.
S3: fixing a vibration damper for a coal gasifier downcomer on a bubble-breaking bed support ring 9, fixedly connecting a base plate 1 with a gasifier downcomer 8, and fixedly connecting the base plate 1 with the gasifier downcomer 8 through welding, bonding, clamping, riveting or bolts, wherein in the embodiment, the contact surface of the base plate 1 and the gasifier downcomer 8 is a curved surface and is fixedly connected with each other in a bonding manner; and fixedly connecting the lower baffle 6 with the foam breaking bed support ring 9, wherein the lower baffle 6 is connected with the foam breaking bed support ring 9 by welding, bonding, clamping, riveting or bolting, or fixedly connecting the foam breaking bed support ring 9, the lower baffle 6 and the box body 4 by the connecting bolt 5, in this embodiment, the lower baffle 6 is fixedly connected with the tail end of the box body 4 by the connecting bolt 5, and the contact surface of the lower baffle 6 and the foam breaking bed support ring 9 is a curved surface and is fixedly connected with each other by bonding. The vibration reduction can be realized by finishing the operation.
In this embodiment, two damping devices for the down pipes of the coal gasifier are installed and arranged at an included angle of 90 degrees.
In other embodiments of the invention, 3-12 damping devices for coal gasifier downcomers are installed and uniformly arranged along the circumference of the bubble breaking bed support ring 9. For example, as shown in fig. 5, 4 damping devices for the downcomer of a coal gasifier are installed, two adjacent damping devices are arranged at an angle of 90 degrees, and according to numerical analysis and calculation, when the stiffness of the dissipative spring is 50N/mm after the damping device provided by the invention is installed, the outlet amplitude of the downcomer is reduced by 15%.
The working principle of the invention is as follows:
when the descending tube vibrates to generate radial displacement, the base plate 1, the guide rod 2 and the upper baffle 3 synchronously displace to exert stretching or compressing action on the energy consumption spring 7, and the energy consumption spring 7 consumes vibration energy to prevent the descending tube 8 of the gasification furnace from generating overlarge amplitude; when the upper baffle plate 3 is displaced, the upper baffle plate moves along the guide rail 10, so that the upper baffle plate is prevented from generating faults such as jamming in the box body 4 and the like, and the vibration damping device is prevented from being out of work.
The above description is only for the preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes and modifications without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.
Claims (10)
1. A vibration damper for a coal gasifier downcomer is characterized by comprising a base plate (1), a guide rod (2), an upper baffle (3), a box body (4), a lower baffle (6) and an energy consumption spring (7), wherein one end of the guide rod (2) is fixedly connected with the base plate (1), and the other end of the guide rod is fixedly connected with the upper baffle (3); the upper baffle (3) is embedded in the box body (4), a guide rail (10) is further arranged in the box body (4), and the upper baffle (3) can move along the guide rail (10); one end of the energy dissipation spring (7) is fixedly connected with the upper baffle (3), and the other end of the energy dissipation spring is fixedly connected with the lower baffle (6); the lower baffle (6) is arranged outside the box body (4) and is fixedly connected with the box body (4).
2. The vibration damper for the coal gasifier downcomer according to claim 1, characterized in that the lower baffle (6) is fixedly connected with the box body (4) by means of connecting bolts (5) or clips.
3. The vibration damper for a coal gasifier downcomer according to claim 1, wherein said guide rail (10) is one of triangular, rectangular, trapezoidal, semicircular, and arcuate in shape.
4. The vibration damper for a coal gasifier downcomer according to claim 1, wherein the guide rod (2) has one of a circular, annular, rectangular, square, i-shaped, angular, and trough-shaped cross-sectional shape.
5. The vibration damper for the coal gasifier downcomer according to claim 1, characterized in that the contact surface of the shim plate (1) and the gasifier downcomer (8) is curved or flat, and the contact surface of the lower baffle (6) and the bubble breaking bed support ring (9) is curved or flat.
6. A vibration reduction method for a coal gasifier downcomer is characterized by comprising the following steps:
s1: embedding an upper baffle (3) into a box body (4), enabling the upper baffle (3) to move along a guide rail (10), and sequentially connecting a base plate (1), a guide rod (2) and the upper baffle (3);
s2: fixedly connecting two ends of an energy consumption spring (7) with an upper baffle (3) and a lower baffle (6), closing and fixedly connecting the lower baffle (6) with the tail end of a box body (4), and assembling to complete the damping device for the coal gasifier downcomer;
s3: the vibration reduction device for the coal gasifier downcomer is fixed on the bubble breaking bed support ring (9), the base plate (1) is fixedly connected with the gasifier downcomer (8), and the lower baffle plate (6) is fixedly connected with the bubble breaking bed support ring (9), so that vibration reduction is realized.
7. The method for damping vibration of a coal gasifier downcomer according to claim 6, wherein two damping devices for a coal gasifier downcomer are installed and are disposed at an angle of 90 ° with respect to each other.
8. The method for damping vibration of a coal gasifier downcomer according to claim 6, characterized in that 3-12 damping devices for a coal gasifier downcomer are installed and are uniformly arranged along the circumference of the bubble-breaking bed support ring (9).
9. The method for damping vibration of a coal gasifier downcomer according to claim 6, characterized in that the shim plate (1) is fixedly connected with the gasifier downcomer (8) by welding, bonding, snapping, riveting or bolting, and the lower baffle (6) is connected with the bubble breaking bed support ring (9) by welding, bonding, snapping, riveting or bolting.
10. The method for damping vibration of a downcomer for a coal gasifier as claimed in claim 6, wherein the support ring (9) of the bubble-breaking bed, the lower baffle (6) and the box body (4) are fixedly connected by means of the connecting bolt (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110250969.4A CN112984042A (en) | 2021-03-08 | 2021-03-08 | Vibration reduction device and method for coal gasifier downcomer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110250969.4A CN112984042A (en) | 2021-03-08 | 2021-03-08 | Vibration reduction device and method for coal gasifier downcomer |
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| Publication Number | Publication Date |
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| CN112984042A true CN112984042A (en) | 2021-06-18 |
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| CN202110250969.4A Pending CN112984042A (en) | 2021-03-08 | 2021-03-08 | Vibration reduction device and method for coal gasifier downcomer |
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| CN204435592U (en) * | 2015-02-06 | 2015-07-01 | 山东大学 | Compound energy-consumption damping control device |
| CN105839806A (en) * | 2016-04-01 | 2016-08-10 | 东南大学 | Viscoelastic vibration reduction and isolation device provided with belleville springs |
| CN106122368A (en) * | 2016-08-17 | 2016-11-16 | 中国机械工业集团有限公司 | A kind of sleeve embedded with spring guide tracked three-way vibration control method |
| CN207107386U (en) * | 2017-06-17 | 2018-03-16 | 遵义医学院附属医院 | A kind of neurosurgery pipettor |
| JP2019529822A (en) * | 2016-09-13 | 2019-10-17 | 青島海爾洗衣机有限公司ＱｉｎｇＤａｏ Ｈａｉｅｒ Ｗａｓｈｉｎｇ Ｍａｃｈｉｎｅ Ｃｏ．，Ｌｔｄ． | Spring damper, cover plate mounting structure and washing machine |
| CN210215265U (en) * | 2019-04-11 | 2020-03-31 | 甘肃蓝科石化高新装备股份有限公司 | A broken bubble subassembly for gasifier and broken bubble of constituteing separate internals thereof |
| CN111021571A (en) * | 2019-12-26 | 2020-04-17 | 山东大学 | Semi-active positive and negative stiffness parallel self-coordination vibration damper |
| CN111043229A (en) * | 2020-01-08 | 2020-04-21 | 天津大学 | Friction energy dissipation supporting device for tower vibration reduction |
-
2021
- 2021-03-08 CN CN202110250969.4A patent/CN112984042A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204435592U (en) * | 2015-02-06 | 2015-07-01 | 山东大学 | Compound energy-consumption damping control device |
| CN105839806A (en) * | 2016-04-01 | 2016-08-10 | 东南大学 | Viscoelastic vibration reduction and isolation device provided with belleville springs |
| CN106122368A (en) * | 2016-08-17 | 2016-11-16 | 中国机械工业集团有限公司 | A kind of sleeve embedded with spring guide tracked three-way vibration control method |
| JP2019529822A (en) * | 2016-09-13 | 2019-10-17 | 青島海爾洗衣机有限公司ＱｉｎｇＤａｏ Ｈａｉｅｒ Ｗａｓｈｉｎｇ Ｍａｃｈｉｎｅ Ｃｏ．，Ｌｔｄ． | Spring damper, cover plate mounting structure and washing machine |
| CN207107386U (en) * | 2017-06-17 | 2018-03-16 | 遵义医学院附属医院 | A kind of neurosurgery pipettor |
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| CN111043229A (en) * | 2020-01-08 | 2020-04-21 | 天津大学 | Friction energy dissipation supporting device for tower vibration reduction |
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Application publication date: 20210618 |