Circular-arc-shaped U valve material returning device for high-density circulating fluidized bed utilizing B-class particle

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 ...

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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 of which 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 upwards facing the anti-material air chamber, the other upwards facing the loose air chamber, the third air duct is located on the side wall of the loose air chamber, and adjusts the air duct for the loose air chamber; the three air passages can be adjusted to cooperate with each other for return The inner cavity of the feeder solves the problems of local flow dead angle, poor fluidization and poor regulation of the U-valve feeder, reduces the risk of coking in the U-valve feeder, and improves the operation of high-density circulating fluidized bed stability

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