A ball mill control device
A control device and ball mill technology, applied in grain processing and other directions, can solve the difficulty of increasing the coal mill outlet temperature and inlet negative pressure control, unable to meet the precise parameter control of the ball mill outlet temperature and inlet negative pressure, and the linearity difference of air duct damper adjustment, etc. question
Active Publication Date: 2016-02-24
SHANDONG AONENG ELECTRIC POWER SCI & TECH
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Problems solved by technology
The reason is that the ball mill needs a large amount of hot air as a desiccant and transport agent for coal powder. Due to the high temperature and pressure of the hot air, the diameter of the air pipe is large, and the linearity of the damper is poor. The impact is fast and large, and the adjustment door of the hot air main pipe alone cannot meet the precise parameter control of the outlet temperature and inlet negative pressure of the ball mill, which increases the difficulty of controlling the outlet temperature and inlet negative pressure of the coal mill.
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[0011] Accompanying drawing is a kind of specific embodiment of the present invention. This embodiment includes a ball mill 1, the entrance of the ball mill 1 is connected to the coal feeder 2, the outlet is connected to the powder discharger 3, the entrance of the ball mill 1 is connected to the hot air pipe 4, the hot air pipe 4 is connected with a hot air regulating door 5, and the hot air regulating door 5 Both ends are connected with a bypass 6, and a hot air bypass regulating door 7 is installed on the bypass 6. A hot air cut-off door 8 is connected in series on the hot air pipe 4, and a cold air door 9 is connected in parallel.
[0012] Adopting a ball mill control device of the present invention, the main hot air regulating door, that is, the hot air regulating door 5 adopts the original tongue-shaped baffle plate unchanged, and a small bypass 6 is installed on the main hot air duct 4, and a small air volume, regulating valve is installed at the same time. The vane-ty...
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The invention relates to a control device of a ball mill, in particular to an inlet hot air control device of a ball mill of a storage type pulverizing system in the middle of a coal-fired boiler. The control device of the ball mill comprises the ball mill, wherein an inlet of the ball mill is connected with a coal feeder; an outlet of the ball mill is connected with a powder discharge machine; the inlet of the ball mill is connected with a hot air pipeline; and a hot air adjusting valve is connected onto the hot air pipeline. The control device of the ball mill is characterized in that the two ends of the hot air adjusting valve are connected with bypasses; and hot air bypass adjusting valves are mounted on the bypasses. The control device of the ball mill has the benefit of guaranteeing that the inlet negative pressure and the outlet temperature of a coal mill are not changed greatly, so that the whole ball mill can operate for a long time safely, stably and reliably.
Description
(1) Technical field [0001] The invention relates to a ball mill control device, in particular to a ball mill inlet hot air control device for a coal-fired boiler intermediate storage type pulverizing system. (2) Background technology [0002] The ball mill of the intermediate storage type pulverizing system is a kind of pulverized coal grinding equipment. Affected by various factors, the operating parameters are constantly changing. The cold air volume and recirculation air volume change; the ball mill inlet negative pressure changes with the ball mill load, hot air volume, cold air volume, and recirculation air volume. The reason is that the ball mill needs a large amount of hot air as a desiccant and conveying agent for pulverized coal. Due to the high temperature and pressure of the hot air, the diameter of the air pipe is large, and the linearity of the damper is poor. The impact is fast and large, and the precise parameter control of the outlet temperature and inlet ne...
Claims
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IPC IPC(8): B02C25/00B02C17/00
Inventor 田玮黄俊平黄义堂高庆
Owner SHANDONG AONENG ELECTRIC POWER SCI & TECH