Double-barrel inner turbine central cylinder of cyclone separator

The technology of a cyclone separator and an inner turbine is applied in the direction of the cyclone axial reversal device, the cyclone device, etc., which can solve the problem of low separation efficiency, achieve high separation efficiency, reduce choked flow and secondary eddy current. , the effect of low running resistance

Inactive Publication Date: 2016-10-12
HUANENG CLEAN ENERGY RES INST
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  • Application Information

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Problems solved by technology

However, from the perspective of practical application, there is a common problem of low separation efficiency.

Method used

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  • Double-barrel inner turbine central cylinder of cyclone separator
  • Double-barrel inner turbine central cylinder of cyclone separator
  • Double-barrel inner turbine central cylinder of cyclone separator

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0030] A new 480t / h circulating fluidized bed boiler, see Figure 1 to Figure 7 , The central cylinder of the two cyclone separators of the boiler adopts a double-tube inner turbine central cylinder. The separator cylinder 2 is respectively connected with the inlet flue 1 and the separator cone 3, the separator standpipe 4 is arranged at the lower part of the separator cone 3, the center cylinder outer cylinder 5 is inserted into the separator cylinder 2 from the upper part, and the center The top of the outer cylinder 5 is fixed in a free hanging manner, and is freely matched with the separator cylinder 2, and can slide relative to each other in a hot state without an expansion dead point.

[0031] In order to improve the separation efficiency, the turbine 7 inside the central cylinder outer cylinder 5 and the central cylinder inner cylinder 6 adopts 4 blades. The depth of the center cylinder outer cylinder 5 inserted into the separator is 10% of the height of the separator ...

specific Embodiment approach 2

[0034] For a 240t / h circulating fluidized bed boiler in service, the central cylinder of the two cyclone separators of the boiler adopts a conventional design. During operation, the carrying capacity is insufficient, and the insertion depth of the original central cylinder is 30% of the height of the separator cylinder 2, and its diameter is 40% of the diameter of the separator cylinder 2.

[0035] The central cylinder of the boiler cyclone separator has been replaced and modified by adopting the double-cylinder internal turbine central cylinder method. The depth of the center cylinder outer cylinder 5 inserted into the separator is 12% of the height of the separator cylinder 2, and the diameter of the central cylinder outer cylinder 5 is the separator. 50% of the diameter of the cylinder body 2, the top of the central cylinder outer cylinder 5 is fixed in a free hanging manner.

[0036] Through the above-mentioned transformation, the boiler can realize full-load operation, an...

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Abstract

The invention discloses a double-barrel inner turbine central cylinder of a cyclone separator. The double-barrel inner turbine central cylinder comprises a central cylinder outer barrel which is inserted into the top of a separator barrel body, a central cylinder inner barrel arranged in the central cylinder outer barrel, a central cylinder inner turbine arranged between the central cylinder outer barrel and the central cylinder inner barrel, and a central cylinder guide cover which is arranged on the inner bottom of the central cylinder, wherein the central barrel inner turbine adopts a spiral steam-line type structure; a rotation direction of blades of the central cylinder inner turbine is different from that of gas flow; the central cylinder inner turbine is provided with 1-8 blades; an included angle between the tangential line of each blade and the circumferential direction is a blade mounting angle being 10-100 degrees; and the central cylinder guide cover is in the shape of bullet. By virtue of the depth, penetration depth of the central cylinder is shortened, integral resistance of the cyclone separator is reduced, flow fields in the separator are optimized, gas-flow tail waggling is relieved, flying dust is avoided and separation efficiency is improved; and the associated scheme can be used for efficiency-enhancing modification of the cyclone separator and design of a high-efficiency low-resistance cyclone separator.

Description

technical field [0001] The invention belongs to the technical field of circulating fluidized bed boilers, and relates to a double-tube inner turbine center tube of a cyclone separator. technical background [0002] The cyclone separator is an important part of the circulating fluidized bed boiler. The gas flow inside the cyclone separator is a complex three-dimensional vortex flow. After the gas carrying solid particles enters the separator cylinder along the tangential direction, a strong swirling motion. This swirling motion can be regarded as a Rankine combination vortex, the outer swirling flow is a quasi-free vortex, and the vortex core of the inner swirling flow is similar to the vortex core of a rigid body rotating. On the outside of the swirl, the gas moves from the top down, then in the center from the bottom up. Among them, the downward movement of the gas in the outer area of ​​the cyclone plays an important role in bringing the solid particles separated from th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B04C5/08B04C5/103B04C5/12
CPCB04C5/08B04C5/103B04C5/12
Inventor 黄中刘冠杰孙献斌江建忠
Owner HUANENG CLEAN ENERGY RES INST
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