High-density circulating fluidized bed arc-shaped u-valve return device using b-type particles

A technology of circulating fluidized bed and feeder, applied in the field of circulating fluidized bed, can solve the problems of poor regulation, poor fluidization, flow dead angle of U valve returner, etc., to reduce the risk of coking and improve stability Effect

Active Publication Date: 2015-12-16
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] A high-density circulating fluidized bed arc-shaped U-valve return device using B-type particles, the bottom is hemispherical, and the section is arc-shaped; there are three air passages at the bottom, and the second air pipe is located at the bottom of the bottom. One way goes up to the return air chamber, the other way goes up to the loose air chamber, and the third air duct is located on the side wall of the loose air chamber to adjust the air duct for the loose air chamber; the three air paths can be adjusted to cooperate with each other for the return material The inner cavity of the device solves the problems of local flow dead angle, poor fluidization, and poor regulation of the U-valve return device, reduces the risk of coking in the U-valve return device, and improves the operation efficiency of the high-density circulating fluidized bed stability;

Method used

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  • High-density circulating fluidized bed arc-shaped u-valve return device using b-type particles
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Embodiment Construction

[0022] Such as figure 1 Shown is a schematic structural view of the arc-shaped U-valve feeder 22 of the high-density circulating fluidized bed using Class B particles of the present invention. The adjustment air duct 4, the loose air chamber 5, the loose air duct 6, the return air duct 7, and the return air chamber 8 form. It is characterized in that: 1. The bottom is a U-valve feeder with a circular arc shape. 2. Arrange one return wind and one loose air at the arc-shaped bottom, and arrange one regulating air on the side wall of the loose air chamber. The diameter of the arc-shaped bottom is set to Φc, the diameter of the loose air duct 6 is set to Φs, the diameter of the return air duct 7 is set to Φf, and the diameter of the return duct 3 is set to Φb, the relationship needs to be satisfied: 2Φb<Φc< 3.5Φb, 0.1Φb<Φs, Φf<0.3Φb. The angle between the return feed pipe 1 and the vertical direction is an angle α (30°<α<45°), and the adjustment air pipe 4 of the loose air cham...

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Abstract

The invention discloses a circular-arc-shaped U valve material returning device for a high-density circulating fluidized bed utilizing the B-class particle, which relates to the technology of the circulating fluidized bed. The device mainly consists of an air supply system, a main bed system, a gas-solid separation system, a material returning system and a test system, wherein the air supply system mainly consists of air compressors; the material returning system consists of a dipleg and a circular-arc-shaped U valve material returning device; and the circular-arc-shaped U valve material returning device is provided with three wind paths. According to the circular-arc-shaped U valve material returning device disclosed by the utility model, the problems of local flowing dead corner, unsmooth fluidization and poor regulation of the traditional right-angle U valve material returning device are solved, the coking risk in the U valve material returning device is lowered, the operation stability of the high-density circulating fluidized bed is improved, and therefore, a foundation is laid for researching and developing the combustion and gasification technology of the high-density circulating fluidized bed.

Description

technical field [0001] The invention relates to the technical field of circulating fluidized beds, and relates to an arc-shaped U-valve feeder for a high-density circulating fluidized bed using B-type particles. Background technique [0002] High-density circulating fluidized bed is a new generation of high-efficiency, low-pollution clean energy technology developed internationally in recent years. It has the characteristics of strong mixing, large processing capacity and wide application range. The normal circulation of materials in the high-density circulating fluidized bed is the prerequisite for its safe operation. In the high-density circulating fluidized bed system, the part that returns the separated solid particles to the riser for circulation is called the return device, including the feed leg and the return device. Among them, the feeder is an important part related to the reaction efficiency and operation regulation. If the feeder does not operate smoothly, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/26
Inventor 王雪瑶雷兢肖云汉徐祥
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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