A pressure-bearing feeder

Abstract

The invention relates the liquid-solid / gas-solid fluidized bed field, and discloses a pressure-bearable material return feeder. The pressure-bearable material return feeder comprises a pressure-bearing housing, wherein a connection port is formed in the top of the pressure-bearing housing, at least one water inlet is formed in the side face of the lower portion of the pressure-bearing housing, anoblique throttling element is further arranged on the inner side of the pressure-bearing housing, the oblique throttling element divides the pressure-bearing housing into a feeding portion and a discharging portion, the top of the feeding portion communicates with the connection port, the bottom of the feeding portion communicates with the bottom of the material discharging portion, and a discharging port is formed in the side face of the discharging portion. The pressure-bearable material return feeder not only is adaptive to Geldart particles of A and B categories, but also is adaptive to fluidization treatment of Geldart particles of D category difficult to fluidize, and compared to common U-shaped valves and circuit seal valves, the pressure-bearable material return feeder not only canbear high pressure, but also difficulty causes water return, and additionally is simple in structure and low in manufacture cost, and has strong practicability.

Description

technical field [0001] The invention relates to the field of liquid-solid / gas-solid fluidized beds, in particular to a pressure-bearing return feeder. Background technique [0002] The feeder is a return structure commonly used in fluidized bed heat exchangers or reaction furnaces, which can stably send the high-temperature solid materials separated by the separator back to the high-pressure combustion chamber or heat exchanger. structure, and at the same time minimize the amount of solid particles that enter the separator through gas backchanneling. Common feeders are generally U valves and loop sealing valves ( figure 1 ), generally used in gas-solid two-phase flow, and the solid particles in it are finer, generally GeldartA and Geldart B particles. [0003] However, most U valves and loop sealing valves are square, and the return feeder of this shape is often difficult to withstand high pressure, and the middle section of the U valve is too long, resulting in poor fluid...

AI Technical Summary

Problems solved by technology

[0003] However, most U valves and loop sealing valves are square, and the return feeder of this shape is often difficult to withstand high pressure, and the middle section of the U valve is too long, resulting in poor fluidity. When the flushing liquid is too large, it is easy to obvious rebate

Therefore, using U valve and loop sealing valve as the feeder is generally only suitable for GeldartA and Geldart B type particles, and for some particle types that are difficult to fluidize under special conditions, such as liquid-solid fluidized bed under high pressure, And Geldart D particles with larger particles and poor fluidity, etc., are often not more suitable

In addition, the U-valve and the loop sealing valve have complex structures, occupy a large space, and have high manufacturing costs

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