Soft measurement method for liquid level fault detection of expansion tank in blast furnace soft water closed circulation system
A soft water sealing and circulation system technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as failure of the expansion tank liquid level detection device, achieve the effect of improving the level of automation and ensuring normal operation
Active Publication Date: 2016-06-29
WISDRI ENG & RES INC LTD
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Problems solved by technology
Due to the harsh smelting environment of the blast furnace, the liquid level detection device of the expansion tank often fails
Method used
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Embodiment Construction
[0021] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the present invention is not limited.
[0022] The invention provides a soft measurement method for detecting the liquid level failure of the expansion tank of the blast furnace soft water closed circulation system, such as figure 1 As shown, it includes the following steps:
[0023] S1. Determine the data acquisition period Δt of the blast furnace soft water closed circulation system; the cross-sectional area S of the expansion tank;
[0024] S2. Collect the height value h of the expansion tank liquid level gauge and the water replenishment flow rate V of the expansion tank replenishment regulating valve every interval of a data collection cycle Δt; and store the collected data into the upper computer according to the first-in-first-out rule In the data stack, the data stack stores data of n acquisition cycles; n is greater than or equal to 3 and is...
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The invention provides a soft measuring method for the fault detection of the expansion tank liquid level of a blast furnace closed soft water circulation system. The soft measuring method comprises the following steps: collecting an expansion tank liquid level meter height value and an expansion tank water supplement adjusting valve water supplement flow for one time every other one data acquisition cycle; sequentially storing the obtained data into a data stack according to the rule of first in-first out; using n groups of data in the data stack to calculate (n-2) groups of soft measurement index values of the fault detection of the expansion tank liquid level; establishing a comprehensive judgment model for the soft measurement index values of the fault detection of the expansion tank liquid level based on different weight technologies; judging whether the expansion tank liquid level of the blast furnace closed soft water circulation system is faulty or not according to comprehensive judgment values of the soft measurement index values of the fault detection of the expansion tank liquid level. Through the utilization of collected data in the practical production process, the soft measuring method for the fault detection of the expansion tank liquid level of the blast furnace closed soft water circulation system is provided; the soft measuring method is suitable for complex severe operation conditions of blast furnace ironmaking, guarantees the normal operation of the blast furnace closed soft water circulation system, and improves the automation level of blast furnace ironmaking production.
Description
technical field [0001] The invention belongs to the field of blast furnace ironmaking, and in particular relates to a soft measurement method for liquid level fault detection of an expansion tank of a blast furnace soft water closed circulation system. Background technique [0002] In the iron and steel metallurgy industry, the blast furnace ironmaking process accounts for 70% of the total energy consumption of iron and steel enterprises. As we all know, the smooth running of the blast furnace is a key link in the blast furnace ironmaking process, and the water supply control of the blast furnace soft water closed circulation system is crucial to the smooth operation of the blast furnace during the smelting process. In general, there are two cases of water replenishment: 1) When the cause of the liquid level drop in the expansion tank is not continuous water leakage, the water replenishment volume of the blast furnace soft water closed circulation system is a static amount a...
Claims
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IPC IPC(8): C21B7/24C21B5/00
CPCC21B5/006C21B7/24
Inventor 赵昊裔
Owner WISDRI ENG & RES INC LTD