A fully automatic fire extinguishing device for preventing deflagration in pulverizing system and its processing method

Abstract

The invention provides a fully-automatic fire extinguishing device capable of preventing a powdering system from detonation and a processing method of the fully-automatic fire extinguishing device. The fire extinguishing device comprises a plurality of coal mills which are in serial connection, and comprises a detecting and analyzing device, an alarm device and an inerting control device, whereinthe detecting and analyzing device is used for detecting and analyzing a detonation parameter variation signal of the coal mills; the alarm device is used for automatically emitting an alarm remindingsignal and starting the inerting control device after the detonation parameter variation signal of the coal mills reaches a certain decision condition; the inerting control device is connected with acoal feeder, and is separately connected with a hot air regulating door and a cold air regulating door; the inerting control device is connected with an isolating electric door; the inerting controldevice comprises an inerting steam source pipeline which is connected to a steam-side steam exhaust tube of a deaerator; the inerting steam source pipeline communicates with the coal mills through inlet steam doors of the coal mills and a fire-extinguishing steam header door; a standby steam source pipeline is additionally arranged behind the inerting steam source pipeline; and a plurality of automatic dewatering devices are arranged on the steam pipelines of the coal mills and are connected to a trench.

Description

technical field [0001] The invention relates to the field of pulverizing systems of coal-fired thermal power plants, in particular to a fully automatic fire extinguishing device for preventing deflagration of pulverizing systems and a processing method thereof. Background technique [0002] Due to the uneven distribution of my country's coal resources, limited mining, and heavy transportation pressure, the coal supply market is tight, and the coal / electricity price ratio has soared, making it impossible for many thermal power plants to purchase the required amount of designed coal; The production cost is more than 70%. In order to reduce the production cost and improve the efficiency of the enterprise, it is forced to broaden the coal purchase channels and purchase some (or easy-to-buy, or low-priced, or low-quality) non-design coal types, which inevitably causes thermal power plants. Co-firing of multiple coal types, pulverizing system equipment not suitable for new coal type...

AI Technical Summary

Problems solved by technology

[0003] 1. Since the current power energy cannot be stored in large quantities, the operation of the pulverizing system needs to be adjusted according to the change of the external load, each parameter is in a dynamic change process, and the abnormality of the equipment occurs suddenly. At present, there is a lack of an accurate and timely judgment and alarm pulverization system The method of deflagration occurs, which leads to a delay in fault discovery, causing accidents such as fire and equipment damage to expand

[0004] 2. Affected by factors such as the suddenness of the abnormal occurrence and the technical skill level of the on-duty personnel, there are large differences in the manual treatment after the deflagration of the pulverizing system. outage accident

[0005] 3. Affected by the design level, manufacturing and installation level, and cost, factors such as the input position of the inerting steam source and the input steam temperature in the design of the pulverizing system are not accurate enough, so it cannot meet the actual needs of rapid commissioning to control deflagration, and there is also steam source drainage Under unreasonable conditions, the normal inerting effect cannot be achieved, and it may even cause secondary deflagration to cause the accident to expand

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