Full-sealed type slag discharging system of coal mill

Abstract

The invention relates to a full-sealed type slag discharging system of a coal mill. The full-sealed type slag discharging system comprises a first pipeline, a ceramic valve, a viton sealing ring and a sealed slag box, wherein the first pipeline is arranged at a slag outlet of the coal mill and is communicated with the slag outlet of the coal mill; the ceramic valve consists of a ceramic sealing pair and a spring jacking type structure and is arranged below the first pipeline; the viton sealing ring is directly embedded into a lower flange of the ceramic valve; and when the slag box is jacked, the slag box is directly in contact with the ceramic valve to form a sealed environment. The full-sealed type slag discharging system also comprises a manual hydraulic trolley which is arranged below the sealed slag box and has functions of jacking and descending the slag box. According to the full-sealed type slag discharging system, internal leakage and external leakage which are caused by poor sealing of the valve of the slag discharging system are fundamentally avoided; and a phenomenon of dust flying in a slag discharging process is avoided.

Description

[0001] technical field [0002] The invention relates to a coal mill fully sealed slag discharge system, in particular to a coal mill fully sealed slag discharge system mainly used in the field of thermal power generation. [0003] Background technique [0004] At present, in most thermal power plants, coal is the main fuel. Raw coal mined from nature needs to be processed before it can be used as fuel for power generation. Processing with a coal mill is one of the steps. However, in the coal mill system currently in operation in my country, the discharge of treated pebble coal is always the largest source of dust pollution in the workshop, which seriously interferes with the safe and civilized production of power plants. [0005] In the existing coal mill system in operation, most of them adopt the buffer box type on-site slag discharge system, that is, the upper slag discharge valve, the buffer slag storage box, the lower slag discharge valve, the open Type slag disc...

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Problems solved by technology

[0006] 1. Due to the long-term operation of the coal mill, the slag discharge valve needs to be opened and closed frequently during the slag discharge process. Ordinary slag discharge valves are prone to internal and external leakage

In the case of external leakage, the dust will directly leak out of the valve; while in the case of internal leakage, even if the valve is closed, the continuous discharge of stone and coal cannot be prevented. If the slag discharge truck does not pick up the material in time, some of the stone coal will be directly discharged to the ground, not only It will affect the follow-up work and the dust raised by the valve leakage will also seriously pollute the environment;

[0007] 2. The pebble coal discharged from the slag outlet of the buffer slag storage box is mixed with dust and foreign matter, and is directly discharged to the open slag discharge vehicle, causing dust during the slag discharge process, and the discharge will also carry a large amount of high temperature during on-site slag discharge Dust, causing environmental pollution and safety hazards

Due to the high temperature in the slag storage box, it is easy to cause damage and aging of the gasket, resulting in poor sealing, resulting in dust leakage and affecting the environment

[0009] 4. The currently used slag trucks are all open type. Since the pebble coal needs to be transported outside the factory building for centralized processing outside the factory building, the open slag truck is filled with high-temperature pebble coal containing a lot of dust and travels through the factory building. Seriously affect the safe and hygienic production of the workshop

[0010] Due to the existence of the above phenomenon, the equipment in the plant has been in a harsh environment for a long time and is easily damaged, resulting in increased maintenance and replacement costs. More importantly, such a working environment seriously endangers the personal health of the workers in the plant

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