KR-20260066837-A - APPARATUS AND METHOD OF ANALZING SOLID CONCENTRATION IN COATING LIQUID

KR20260066837AKR 20260066837 AKR20260066837 AKR 20260066837AKR-20260066837-A

Abstract

An apparatus for analyzing the concentration of solids contained in a coating solution according to one embodiment of the present invention comprises one or more processors; and a storage medium for storing computer-readable instructions, wherein when computer-readable instructions are executed by one or more processors, one or more processors can: measure the refractive index of a coating solution maintained at a constant temperature within an error range through a temperature maintaining unit in real time, and determine the concentration of solids contained in the coating solution based on the refractive index of the coating solution measured in real time.

Inventors

최창훈
김성엽

Assignees

주식회사 포스코

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (15)

In a device for analyzing the concentration of solids contained in a coating solution, One or more processors; and It includes a storage medium that stores computer-readable instructions, When the above computer-readable instruction is executed by the above one or more processors, the above one or more processors: The refractive index of a coating solution maintained at a constant temperature within an error range is measured in real time through a temperature maintenance unit, and A device for analyzing the concentration of solids contained in a coating solution, configured to determine the concentration of solids contained in the coating solution based on the refractive index of the coating solution measured in real time.
In paragraph 1, The above temperature maintaining unit is, A device for analyzing the concentration of solids contained in a coating solution, comprising a Peltier element.
In paragraph 1, The concentration of the above solid and the above refractive index are, A device for analyzing the concentration of solids contained in a coating solution having a proportional relationship.
In paragraph 1, The above one or more processors, A device for analyzing the concentration of solids contained in a coating solution, configured to measure the refractive index of the coating solution using total internal reflection.
In paragraph 1, The above one or more processors, A device for analyzing the concentration of solids contained in a coating solution, configured to periodically determine the concentration of solids.
In paragraph 1, A device for analyzing the concentration of solids contained in a coating solution, further comprising a transfer unit for transferring a coating solution contained in a drip pan.
In paragraph 6, The above transfer unit is, A first pipe connected to the drip pan above; A first transfer pump for transferring the coating liquid contained in the drip pan through the first pipe; and A device for analyzing the concentration of solids contained in a coating solution, comprising a first shut-off valve provided in the first pipe.
In paragraph 1, A device for analyzing the concentration of solids contained in a coating solution, further comprising a discharge unit connected to the refractive index measuring unit and discharging the coating solution after measurement is completed.
In paragraph 8, The above discharge section is, A second pipe connected to the above refractive index measuring unit; A second transfer pump for discharging the coating liquid contained in the refractive index measuring unit through the second pipe; and A device for analyzing the concentration of solids contained in a coating solution, comprising a second opening/closing valve provided in the second pipe.
In a method for analyzing the concentration of solids contained in a coating solution, A first step of measuring the refractive index of a coating solution in real time, which is maintained at a constant temperature within an error range through a temperature maintaining unit; and A method for analyzing the concentration of solids contained in a coating solution, comprising a second step of determining the concentration of solids contained in the coating solution based on the refractive index of the coating solution measured in real time.
In Paragraph 10, The above temperature maintaining unit is, A method for analyzing the concentration of solids contained in a coating solution, comprising a Peltier element.
In Paragraph 10, The concentration of the above solid and the above refractive index are, A method for analyzing the concentration of solids contained in a coating solution having a proportional relationship.
In Paragraph 10, The step of measuring the refractive index of the above coating solution is, A method for analyzing the concentration of solids contained in a coating solution by measuring the refractive index of the coating solution using total internal reflection.
In Paragraph 10, The above concentration analysis method is, A method for analyzing the concentration of solids contained in a coating solution, performed periodically.
In Paragraph 10, A step of transferring the coating liquid contained in the drip pan; and A method for analyzing the concentration of solids contained in a coating solution, further comprising the step of discharging the coating solution after measurement is completed.

Description

Apparatus and Method of Analyzing Solid Concentration in Coating Liquid The present application relates to an apparatus and method for analyzing the concentration of solids contained in a coating solution. In general, a post-treatment solution is coated onto the surface of a coil-shaped galvanized steel sheet through a roll coating process. The post-treatment solution is typically contained in a wide pan called a drip pan, and the coating is applied to the surface of the steel sheet by means of a pick-up roll and an applicator roll. The drip pan has a structure that is widely exposed to the atmosphere, and during long-term coating operations, the solid content of the post-treatment solution inside the drip pan can continuously change due to causes such as the solution adhering to and being consumed on the steel plate surface by the coating process, or the solvent volatilizing into the atmosphere. The varying solid content of the solution leads to inconsistent adhesion amounts under identical equipment conditions, which can act as a factor affecting the quality of surface-treated steel sheets. Therefore, measuring the changing solid content of the solution in real time to maintain a consistent post-treatment adhesion amount for identical surface-treated steel sheets is crucial for ensuring quality robustness. Conventionally, the method for measuring the solid content of a solution involves separating the volatile and non-volatile components within the solution using various methods, measuring the weight of the remaining non-volatile component, and calculating the weight ratio of the non-volatile component to the initial solution to determine the solid content. Methods for separating volatile and non-volatile components from solution samples include drying, centrifugation, and filtration using filters; however, since these methods require a significant amount of time for the separation and weighing process, there are limitations to measuring the weight of solids in real time. FIG. 1 is a drawing illustrating a device for analyzing the concentration of solids contained in a coating solution according to one embodiment of the present invention. FIG. 2 is a flowchart illustrating a method for analyzing the concentration of solids contained in a coating solution according to one embodiment of the present invention. FIG. 3 is a block diagram of a computing device that can wholly or partially implement a solid content concentration analysis device according to one embodiment of the present invention. Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to facilitate a comprehensive understanding of the methods, apparatuses, and/or systems described herein. However, this is merely illustrative and the present invention is not limited thereto. In describing the embodiments of the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such descriptions might unnecessarily obscure the essence of the invention. Furthermore, the terms described below are defined in consideration of their functions within the present invention, and these definitions may vary depending on the intentions or practices of the user or operator. Therefore, such definitions should be based on the content throughout this specification. Terms used in the detailed description are intended merely to describe the embodiments of the present invention and should not be limiting in any way. Unless explicitly stated otherwise, expressions in the singular form include the meaning of the plural form. In this description, expressions such as "include" or "comprise" are intended to refer to certain characteristics, numbers, steps, actions, elements, parts thereof, or combinations thereof, and should not be interpreted to exclude the existence or possibility of one or more other characteristics, numbers, steps, actions, elements, parts thereof, or combinations thereof other than those described. FIG. 1 is a drawing illustrating a device for analyzing the concentration of solids contained in a coating solution according to one embodiment of the present invention. As illustrated in FIG. 1, a device (100) for analyzing the concentration of solids contained in a coating solution according to one embodiment of the present invention may include a transfer unit (110), a concentration analysis unit (120), and a discharge unit (130). First, the transfer unit (110) can transfer the coating liquid contained in the drip pan (10) to the concentration analysis unit (120). This transfer unit (110) may include a first pipe (111) connected to a drip pan (10), a first transfer pump (112) for transferring a coating liquid contained in the drip pan (10) through the first pipe (111) to a concentration analysis unit (120) (see D1), and a first opening/closing valve (113) provided in the first pipe (111)