Water replenishment control method of blast furnace soft water closed circulation system
A soft water sealing and circulation system technology, applied to blast furnaces, blast furnace details, furnaces, etc., can solve problems such as balance between water replenishment and leakage, affect normal production of blast furnaces, and abnormal liquid level of expansion tanks, etc., to ensure normal production , Overcome the time lag of control input and improve the effect of automation level
Active Publication Date: 2016-04-20
WISDRI ENG & RES INC LTD
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Problems solved by technology
Due to the time lag of control input, the traditional control algorithm cannot complete the task of replenishing water well, and the amount of replenishing water and leakage cannot be balanced, so that the liquid level of the expansion tank is often in an abnormal state, and what is more, it will affect the normal production of the blast furnace
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[0024] The present invention will be further described below in conjunction with specific examples and accompanying drawings.
[0025] This embodiment provides a method for replenishing water in a closed circulation system of blast furnace soft water, which includes the following steps:
[0026] S1. Determine the maximum time lag τ from the action of the replenishment regulating valve to the soft water replenishment to the expansion tank. max and the delay minimum τ min :
[0027] τ max = L v min , τ min = L v max ,
[0028] Among them, L is the pipe distance from the water supply regulating valve to the expansion tank, in m; v min It is the minimum flow rate of soft water after the replenishment regulating valve is opened, the unit...
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The invention provides a water supplement control method of a blast furnace soft water closed circulating system. The water supplement control method comprises the steps: determining a maximum time-lag value and a minimum time-lag value from the start of operation of a water supplement adjustment valve to the whole process for supplementing soft water to an expansion tank; constructing a water supplement model of the blast furnace soft water closed circulating system; constructing a control mode for the water supplement flow of the water supplement adjustment valve. The control mode for the water supplement flow of the water supplement adjustment valve is constructed by analyzing a water supplement mechanism of the blast furnace soft water closed circulating system, so that adverse effects caused by control input time lag are effectively avoided, and finally the water supplement amount and the leakage amount are balanced; therefore, a normal state of a liquid level of the expansion tank is kept, and normal production of a blast furnace is guaranteed, so that high-quality molten iron product can be produced, and the automation level of ironmaking production of the current blast furnace is increased.
Description
technical field [0001] The invention belongs to the field of blast furnace ironmaking, and in particular relates to a water replenishment control method of a blast furnace soft water closed circulation system. Background technique [0002] In the iron and steel metallurgical industry, the blast furnace ironmaking process accounts for more than 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. During the smelting process, the water supply control of the blast furnace soft water closed circulation system is very important for the smooth operation of the blast furnace production. 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 and its value ...
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IPC IPC(8): C21B5/00G06F19/00
Inventor 赵昊裔
Owner WISDRI ENG & RES INC LTD