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Flow control method for BMD injection water

A flow control and water flow technology, applied in pump control, components of pumping devices for elastic fluids, non-variable-capacity pumps, etc., can solve the problems of complex control algorithm, poor operability, etc. Stable, guaranteed reliability, good descaling effect

Active Publication Date: 2020-12-11
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control algorithm proposed in this document is complex and poor in operability in practical applications

Method used

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  • Flow control method for BMD injection water
  • Flow control method for BMD injection water
  • Flow control method for BMD injection water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Set the starting speed of motor 9 to 500rpm, after a delay of 1 minute, if you choose to automatically calculate the set value of the motor speed, calculate it every 0.1 minutes according to the following steps:

[0069] 1) Receive the flow actual value Q measured by the flow meter 10 act =72m 3 / h;

[0070] 2) Water flow deviation △Q=100-72=28m 3 / h;

[0071] 3) Calculate the gain coefficient k Q :

[0072]

[0073] 4) Calculate the adjustment amount of the motor speed setting value △V=0.351×28=9.8;

[0074] 5) Judging whether the adjustment amount △V of the motor speed setting value exceeds the limit value, and it is not exceeded;

[0075] 6) Calculate the current motor speed setting value V new =V old +△V=500+9.8=509.8rpm;

[0076] 7) Save the current motor speed setting value V old =509.8m / s.

Embodiment 2

[0078] Set the starting speed of motor 9 to 600rpm, after a delay of 1 minute, if you choose to automatically calculate the set value of the motor speed, follow the steps below to calculate every 0.1 minutes:

[0079] 1) Receive the flow actual value Q measured by the flow meter 10 act =85m3 / h;

[0080] 2) Water flow deviation △Q=100-85=15m 3 / h;

[0081] 3) Calculate the gain coefficient kQ:

[0082]

[0083] 4) Calculate the adjustment amount of the motor speed setting value △V=0.351×15=5.265;

[0084] 5) Judging whether the adjustment amount △V of the motor speed setting value exceeds the limit value, and it is not exceeded;

[0085] 6) Calculate the current motor speed setting value V new =V old +△V=600+5.265=605.265rpm;

[0086] 7) Save the current motor speed setting value V old = 605.265 rpm.

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Abstract

The invention discloses a flow control method for BMD injection water. The method comprises a filtering system and an injection system connected with the filtering system through a water pump and a pipeline, a motor drives the water pump to generate flow, a flowmeter measures the actual value of the flow in the pipeline, and the water pump is controlled to generate different water flows through different rotating speeds of the motor; the motor control comprises starting, stopping, automatic calculating a motor speed set value and manual setting of the motor speed set value; the step of automatically calculating the motor speed set value comprises the steps of firstly setting a flow set value Qset and then calculating the motor speed value every other control period T. According to the flowcontrol method, the feeding flow speed of the BMD injection system can be stabilized, and therefore the good descaling effect is achieved.

Description

technical field [0001] The invention relates to a feed material flow rate control technology of a BMD injection system, and more specifically, relates to a flow control method of BMD injection water. Background technique [0002] Surface oxides (commonly known as scales) after hot rolling of metal materials usually need to be effectively removed before post-processing, which is called descaling. The commonly used descaling process is chemical pickling, but this process always has many defects such as large pollution, high cost, and unstable quality. Based on this, we began to develop BMD technology (Baosteel Mechanical Descaling technology, referred to as BMD), which uses a mixed jet method of water + abrasive particles to achieve descaling through the continuous impact and grinding of the jet medium on the metal surface. [0003] Such as figure 1 As shown, the existing BMD injection system includes: mixed jet injection system 1, medium recovery system 2, filtration system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D13/06F04D15/00F04D29/70
CPCF04D15/0022F04D15/0088F04D13/06F04D15/0066F04D15/00F04D29/708
Inventor 徐江华段明南房鑫杨向鹏
Owner BAOSHAN IRON & STEEL CO LTD