Redundant air adjusting system

Abstract

The invention relates to a redundant air adjusting system which comprises at least 4 blast blowers and at least 4 blast furnaces, wherein each blast blower is respectively communicated with a blast mother pipe of each blast furnace; each blast mother pipe is provided with a main air adjusting system and a standby air adjusting system; and air adjusting mother pipes of the main air adjusting system and standby air adjusting system are respectively communicated with any two blast mother pipes. Compared with the prior art, the redundant air adjusting system has the following advantages: the redundant-configuration control system and air adjusting system are adopted to provide double safety for blast furnace air supply, thereby further enhancing the reliability of the air supply system; the blast blowers and main and standby air adjusting systems respectively adopt a machine-side control box to implement off-line operation, thereby ensuring the safe and smooth production of the blast furnaces under the extreme conditions of poor network or failure of the control system; and by adopting the redundant-configuration air adjusting system, the air adjusting mother pipe can be indirectly communicated with the blast mother pipe, thereby being beneficial to simplifying the system connection relation and facilitating the increase / decrease configuration of the blast blowers.

Description

technical field [0001] The invention relates to the technical field of automatic control of metallurgical blast furnace smelting, in particular to a redundant blowing system when multiple blast furnaces are blown by multiple blowers. Background technique [0002] There is a saying in the blast furnace smelting industry: "Where there is wind, there is iron", which shows that the fan plays a key role in the stable and smooth operation of the blast furnace. As the volume of blast furnaces in domestic iron and steel plants continues to increase and the top pressure of blast furnaces continues to increase, it is extremely important to ensure the stability and smooth operation of blast furnaces. But in the iron and steel plant, due to various reasons, the blower accident trips frequently occur, causing the blast furnace to cut off the wind, resulting in serious production accidents such as "slag filling" and "sitting" of the blast furnace. At present, the commonly used solution i...

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Problems solved by technology

[0003] The Chinese patent with application number 200810301630.7 (application date is May 19, 2008) discloses a "multi-pipe blast furnace ventilation system", through which two fans supply air to at least two main ducts Winding; Chinese patent application number 201120046451.0 (application date: February 24, 2011) discloses an "Automatic Winding System for Multiple Blowers in a Blast Furnace"; through the automatic ventilation system, more than three blowers can be aligned Blast furnace air supply problem; however, due to control system failure, network instability or abnormality in the ventilation system, it will still affect the smooth progress of production, and it is impossible to completely eliminate the occurrence of blast furnace air failure accidents

Moreover, in these two schemes, the ventilation system and the air supply main pipe are directly connected, and the connection is relatively complicated. When the number of blowers needs to be increased, the wiring is not convenient, and the number of valves used is large

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