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Water supplying pressure controlling method and system

A pressure control and pressure technology, which is applied in the field of water supply pressure control methods and systems, can solve the problems of water supply pressure unable to meet pressure requirements and reduction of steelmaking efficiency.

Active Publication Date: 2019-07-12
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a water supply pressure control method and system, which is used to solve the problem of the water supply pressure in the prior art when more than three converters open the cooler valves at the same time during the steelmaking process. Can not meet the pressure demand, which leads to the technical problem of steelmaking efficiency decline

Method used

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  • Water supplying pressure controlling method and system
  • Water supplying pressure controlling method and system

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Embodiment 1

[0034] This embodiment provides a water supply pressure control method, such as figure 1 As shown, the methods include:

[0035] S110, when it is determined that there are four converters blowing at the same time, control the first power frequency motor, the second power frequency motor, the third power frequency motor and the first frequency conversion motor to start;

[0036] In this embodiment, the number of converters currently in the blowing state is determined by collecting converter blowing signals. When it is determined that there are four converters blowing at the same time, control the first power frequency motor, the second power frequency motor, the third power frequency motor and the first frequency conversion motor to start. The speed of the first variable frequency motor is 35-50 Hz.

[0037] Here, the simultaneous blowing of four converters includes two types: one is that there are always four converters in the blowing state; the other is that the blowing of ...

Embodiment 2

[0059] Based on the same inventive concept, this embodiment also provides a water supply pressure control system, such as figure 2 As shown, the system includes: a controller 1, a pressure sensor 2, a flow sensor 3, a frequency converter 4, a motor controller 5 and a motor 6; wherein, the controller 1 is a programmable logic controller (PLC, Programmable Logic Controller). The controller 1 establishes communication with the frequency converter 4 and the motor controller 5 through the DP network, and the pressure sensor 2 and the flow sensor 3 are connected to the analog interface of the controller 1 respectively.

[0060] In this implementation, there are five motors in total, including three power frequency motors and two variable frequency motors. The industrial frequency motor is controlled by the motor controller 5 , and the variable frequency motor is controlled by the frequency converter 5 .

[0061] As an optional embodiment, the controller 1 is configured to: determi...

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Abstract

The invention provides a water supplying pressure controlling method and system. The method comprises the steps that a first power frequency motor, a second power frequency motor, a third power frequency motor and a first frequency converting motor are controlled to start when it is determined that four converters blow; whether or not the pressure of a water supplying main pipe is within the rangeof 1.05-1.2 MPa is judged after the motors are started for a preset period of time, if yes, the speed of the first frequency converting motor is controlled to be the maximum operating speed, and theoperating manner is power frequency operating; a second power converting motor is started, and the operating speed of the second frequency converting motor is 35-40 Hz; when the number of the converter is increased to four from three of less than three and a valve of an evaporating cooling device is started, four power frequency motors are controlled to start, the pressure of the water supplying main pipe can be ensured to be timely adjusted, adjusting is conducted by using a frequency converting motor so that the pressure of the water supplying main pipe can be allowed to be maintained withina normal range, the problem of the failure of making steel continuously caused by the linkage locking of the converters is prevented, and therefore the steel making efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of converter steelmaking, in particular to a water supply pressure control method and system. Background technique [0002] In the converter blowing process, the evaporative cooler is a device for cooling and reducing dust in the dry dust removal process of the converter. By timely adjusting the valve opening of the evaporative cooler and quickly controlling the flow change, the effect of cooling and dust removal is ensured. [0003] The feed water pump that supplies water to the evaporative cooler must ensure that the water supply pipeline has sufficient pressure to meet the requirements of the water supply flow. In actual production, multiple water supply pumps are generally set up to supply water to the main pipe of the evaporative cooler, and then the main pipe is divided into multiple branch pipes to each converter. During the smelting process, it is generally sufficient to open the evaporator cooling v...

Claims

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Application Information

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IPC IPC(8): C21C5/40C21C5/30
CPCC21C5/30C21C5/40Y02P10/25
Inventor 王景娟郑泰吕永学王鑫邓海峰孟志铎李珊珊史良张冲李海宽温严王艳超
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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