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Method and system for controlling water supply pressure

A pressure control and pressure technology, which is applied in the field of water supply pressure control method and system, can solve the problems of steelmaking efficiency decline, water supply pressure cannot meet the pressure demand, etc., and achieve the effect of improving steelmaking efficiency

Active Publication Date: 2021-11-05
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method and system for controlling water supply pressure
  • Method and system for controlling water supply pressure

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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 present invention provides a water supply pressure control method and system, including: when it is determined that four converters are 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; After the preset time is turned on, judge whether the pressure of the main water supply pipe is within the range of 1.05-1.2MPa, if so, control the speed of the first variable frequency motor to the maximum operating speed, and the operation mode is industrial frequency operation; and control the second variable frequency motor to turn on , the running speed of the second variable frequency motor is 35-40Hz; in this way, when there are three or less converters suddenly increased to four converters to open the valve of the evaporative cooler, the four power frequency motors are controlled to open, which can ensure that the pressure of the main water supply pipe can be timely It is adjusted, and then adjusted with a variable frequency motor, so that the pressure of the water supply main pipe can be kept within the normal range; in this way, the situation that the converter interlock cannot continue to make steel can be avoided, thereby improving the steel making efficiency.

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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Patent Type & Authority Patents(China)
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