A parallel fluidized bed dry separation device and method
A sorting device and fluidized bed technology, applied in chemical instruments and methods, separating solids from solids with airflow, solid separation, etc., can solve the problems of large power consumption, affecting the stability of equipment structure, and destroying the traditional bed layer. Structure and other issues, to achieve the effect of particle sorting
Active Publication Date: 2018-09-07
ZHEJIANG UNIV
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Problems solved by technology
However, the above-mentioned patents all use a vibrator to make the sorting bed or the air distribution plate vibrate periodically, and the transmission structure is complicated, which leads to the vibration energy destroying the traditional structure of the bed and affecting the stability of the equipment structure; in addition, the vibration energy needs to drive the entire bed Movement, power consumption is large, and most of the vibration energy is used for non-effective content
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[0025] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0026] Such as figure 1 In the parallel fluidized bed dry separation device shown, the main bed elbow joint is 0.1L away from the bottom of the main bed, the starting position of the variable diameter section of the main bed is 0.2L away from the main bed elbow joint, and heavy and large particles are discharged The position is located at the bottom of the main bed 0.05L from the elbow joint of the main bed. The valve at the bottom of the accompanying bed is a butterfly valve. The feeding position of the material to be sorted is located at 0.4H. L is the height of the main bed and H is the height of the accompanying bed.
[0027] Firstly, with the butterfly valve at the bottom of the companion bed closed, it is filled with particles of the same density mixed at a certain height with uniform particle diameters of 2.5 mm (particle 1) and 0.5 mm (particle 2). ...
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The invention discloses a parallel connection fluidized bed dry separation device and method. The device is composed of a main fluidized bed and an auxiliary fluidized bed which are connected in parallel. The main fluidized bed is connected with the bottom of the auxiliary fluidized bed through a bent pipe. The device is used for granule reciprocated transfer to form granule oscillating circulation. Fluidized air exhausted from the top is converged through a pipeline and then exhausted out of the device. A valve is arranged at the bottom of the auxiliary fluidized bed to control the granule transfer speed. The method comprises the steps that granule oscillating circulation is formed in the fluidized beds connected in parallel through the granule characteristics of materials to be separated, the superficial gas velocity in the main fluidized bed and the superficial gas velocity in the auxiliary fluidized bed produce cyclical fluctuations with opposite trends, then granules to be separated produce relative sliding movement in the main fluidized bed and the auxiliary fluidized bed due to density difference or granule diameter, and finally granule separation is achieved. According to the device and method, fluctuation of superficial gas velocity inside the beds and bed layer self oscillation can be achieved with no external vibration equipment, and granule separation is achieved.
Description
technical field [0001] The invention relates to a dry separation device and method, in particular to a parallel fluidized bed dry separation device and method suitable for particle separation of coal, ore and other materials. Background technique [0002] Particle sorting is widely used in the field of energy and chemical industry to improve the utilization efficiency of resources. Taking coal as an example, my country's high-quality coal resources are scarce, unevenly distributed, and directly polluted seriously. If the minerals and sulfur components that constitute ash in coal are removed, the heat production rate of coal can be increased, the boiler combustion can be stabilized, and at the same time reduce Reduces slag volume, reduces boiler wear and corrosion. Therefore, coal sorting has become a key technical means to optimize the utilization of coal resources. In addition, in the field of garbage combustion, garbage sorting technology is also particularly important. G...
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IPC IPC(8): B07B7/12
CPCB07B7/12
Inventor 黄正梁訾灿廖祖维王靖岱蒋斌波阳永荣葛世轶陈美王浩同周冰洁范小强沈旻张擎杨遥何乐路胡东芳时强柳莺
Owner ZHEJIANG UNIV