A kind of induced air volume control method
A control method and technology for inducing wind, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of energy waste, induced air volume error, increased dust volume and material loss, etc. Induction of air volume and dust generation, and the effect of reduced power
Active Publication Date: 2018-03-20
TIDFORE HEAVY IND
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Problems solved by technology
Therefore, based on the results obtained by the traditional induced air volume calculation method to control the induced air volume, there is an error between the induced air volume and the actual induced air volume. Generally, excessive induced air will be extracted, resulting in waste of energy, and increased dust and material losses.
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Embodiment
[0044] Embodiment: Taking a certain coal transfer point, the calculation of the induced air volume caused by the flow and shear air of coal materials is an example, including the following steps:
[0045] S1 build physical model
[0046] The physical geometry model of the transfer station is as follows: figure 2 As shown, it is composed of conveyor belt (upper belt) 1, head hopper 2, material guide chute 3, discharge chute 4, transfer belt (lower belt) 5, belt roller, etc. A-A section is the induced air volume monitoring surface.
[0047] S2 sets boundary conditions
[0048] Boundary conditions and technical parameters of transshipment are shown in Table 1 below.
[0049] Table 1 Transshipment Technical Parameters
[0050] technical characteristics
parameter value
Coal bulk density / (t / m 3 )
0.85
Coal particle size / mm
≦300
Rated capacity / (t / h)
4000
Maximum capacity / (t / h)
4500
Drive roller diameter / mm
1000
...
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A method for controlling the induced air volume. After calculating the effective induced air volume, the induced air volume extracted by the control fan is equal to the calculated effective induced air volume. The calculation of the effective induced air volume includes the following steps: establishing a physical model; setting boundary conditions; establishing a mathematical model; Coupling calculation of air flow field and particle field: the original air flow field result is obtained by fluid dynamics calculation, and the air flow field parameters are transferred to the particle field, and the particle force is calculated based on the particle mechanics module under the flow field, and then through internal iterative calculation The movement parameters of the particles at the next time step are updated at the same time; the particle field parameters are passed to the airflow field, and the airflow field is calculated iteratively and convergently under the action of the particle field, and the cycle is continuous to realize the coupling calculation of the particle field and the airflow field; the calculation effectively induces Air volume. The extracted induced air volume is equal to the effective induced air volume, which can save energy and reduce the generation of dust.
Description
technical field [0001] The invention relates to the technical field of bulk material transportation control, in particular to a method for controlling the induced air volume of a dust removal device at a bulk material transportation and transfer place. Background technique [0002] During the conveying process of bulk materials, such as the blanking process of the belt conveyor transfer point, a certain amount of air will be brought in. At this time, the air pressure in the guide trough will inevitably rise, and the induced wind will be formed due to the effect of the air flow. The wind blows out from the notch, and the dust brought out has an impact on the indoor environment. The traditional calculation method of induced air volume is only related to the conveying volume of the belt conveyor and the speed of the material, and does not consider the interaction between the material and the air, and does not consider the speed direction of the induced wind. Therefore, based o...
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IPC IPC(8): G06F17/50
Inventor 张文超黄强
Owner TIDFORE HEAVY IND