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Predictive control system and method for card pump washing process in a pump plant

A predictive control, pulp mill technology, applied in pulp beating/refining method, washing/replacing pulp treatment liquid, fine split raw material pretreatment, etc., can solve unreliable, difficult correction problems, etc., to reduce energy costs, Effect of reducing bleaching cost and improving pulp quality

Pending Publication Date: 2022-07-29
BUCKMAN LAB INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the inherently dynamic nature of the brownstock washing process has traditionally made predictive analysis and associated process corrections extremely difficult and unreliable

Method used

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  • Predictive control system and method for card pump washing process in a pump plant
  • Predictive control system and method for card pump washing process in a pump plant

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Embodiment Construction

[0026] While the making and using of various embodiments of the present invention are discussed in detail below, it should be appreciated that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed herein are merely illustrative of specific ways to make and use the invention, and do not delineate the scope of the invention.

[0027] The following detailed description of embodiments of the present disclosure refers to one or more accompanying drawings. The figures are provided for the purpose of explaining the present disclosure and are not limiting. Those skilled in the art will appreciate that various modifications and variations can be made in the teachings of the present disclosure without departing from the scope of the present disclosure. For example, features shown or described as part of one embodiment can be used with another embodiment to yield yet another embod...

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Abstract

Systems and methods for predictive control of coarse pulp processing at a pulp mill are provided. Various on-line sensors produce output signals representing actual values of respective process characteristics, each of which is directly or indirectly affected by adjustments to a corresponding process variable. The controller uses the output signal or related measurement data to dynamically set a target value for the process characteristic based on the predicted impact on the control response of the corresponding process variable. The controller further generates control signals to actuators associated with the respective process variables based on differences between the detected respective actual values and target values. Exemplary pulp wash control systems may optimize various types of pulp wash configurations, including, for example, vacuum drum washers, compaction baffle washers, chemical washers, direct displacement washers, and wash presses. Cloud-based analysis and machine learning may also be implemented to improve the control algorithm over time.

Description

technical field [0001] The present invention generally relates to control systems and methods for pulp mills. More particularly, the present invention relates to supervisory and independent control systems and methods for brown stock washing across a variety of potential configurations. Background technique [0002] Conventional brown stock washing systems in pulp mills are designed to separate pulp from black liquor. Water is used in a countercurrent washing system to facilitate washing of the black liquor from the pulp. Pulp mill operators (operators) face the challenge of balancing the cost of improved separation with the use of water for separation. Process variability from a range of factors (including, for example, temperature, pH, conductivity, Kappa, wood species, consistency, entrained air, fiber freeness, soap concentration, residual base, etc.) makes it difficult to maintain peaks washing efficiency. The result is reduced efficiency, which leads to higher manu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/00D21D99/00D21C9/02
CPCG01N33/343D21C7/00D21C3/00D21C1/00D21C3/228D21C3/24D21C9/02D21C9/06
Inventor M.D.施罗恩S.阿雷奥拉R.B.怀特R.勒斯克N.布兰德伯格
Owner BUCKMAN LAB INT INC
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