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Determination of gas solubility, entrained gas content, and true liquid density in manufacturing processes

A gas content, liquid technology, applied in the direction of liquid transportation, gas diffusion analysis, pulp raw material addition process, etc., can solve the problems of impracticability, solubility difference, error, etc., and achieve the effect of optimizing the production process

Inactive Publication Date: 2009-04-08
APPLETON PAPERS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this approach is also generally not feasible because the Henry's Law constant does not exist in many process fluids, especially in coating slurries that include multiple components
Simulating the constants of one known liquid with the constants of another approximate liquid can lead to considerable errors due to the large differences in the solubility of gases - such as air - between different liquids

Method used

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  • Determination of gas solubility, entrained gas content, and true liquid density in manufacturing processes
  • Determination of gas solubility, entrained gas content, and true liquid density in manufacturing processes
  • Determination of gas solubility, entrained gas content, and true liquid density in manufacturing processes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0243] Example 1 - Entrained Air: Indirect Determination of Entrained and Dissolved Air Content in a Liquid equipment

[0244] Figure 1 depicts the specific hardware architecture for using the indirect assay setup described above. The device shown in Figure 1 was tested in the "no-flow" state. The apparatus 10 in Fig. 1 comprises a container for processing liquid from which the liquid is pumped by a piping system subject to at least three different pressure states P 1 ,P 2 ,P 3 control of the pressure regulator. Each of these pressures is greater or less than the preceding pressure. For example, the order can be P 1 2 3 , or P 1 >P 2 ,P 1 2 , or any other combination. Furthermore, these pressures can also be based on system constraints or settings of assay objects. The liquid flow in the pipeline is controlled by three valves V1, V2, V3. This particular device also includes pressure gauges 12 and density and temperature gauges 14 .

[0245] The measurement proce...

Embodiment 2

[0246] Example 2 - Entrained Air: Optimizing Degassing Operations During Lamination

[0247] During some coating operations, the environment requires extreme removal of gas entrapped in the coating liquid to be coated on the substrate. This is because air bubbles, especially large air bubbles, trapped in the fluid can deteriorate the film quality and cause peritoneal defects such as transitional stomata. With the rapid development of high-speed injection and curtain coating technology-in this new technology, a thin liquid film is not only injected but also freely covered on the substrate to be coated-any entrained large air bubbles will cause damage to the free coating. The overall destruction of the liquid film. Therefore, a degassing process is a must in high velocity jetting and curtain lamination applications.

[0248] In one application according to the present invention as shown in FIG. 5 , degassers are integrated before and after the curtain film-coated piping syst...

Embodiment 3

[0250] Example 3 - Air Trapping: Quality Control in Film Application Systems

[0251] In Example 2, the degassing unit can reduce waste costs by avoiding the manufacture of substandard products. When the level of percent air entrainment that would cause quality problems in the product is known, the measured percent air entrainment can be used to stop production, or can be used to predict when out-of-spec product will be produced. It is not necessary to integrate two devices ("front" and "rear") according to embodiments of the present invention on the biometric system (as shown in FIG. 5 ). Instead, a system with a single device according to an embodiment of the invention can be located, for example, behind the degassing unit. The system can be set to sound an alarm if a large amount of air bubbles is detected in the slurry downstream of the degassing unit. This kind of production system with alarm can greatly reduce the use of expensive foaming agent, but it is necessary t...

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Abstract

Improved control of continuous processes that handle liquids. Data generated by this invention is used to control gas contents of liquids within optimum ranges, for instance in paper coating processes and in the manufacture of food products (ketchup), personal care products (shampoo), paints, and in any industry where information on entrained and / or dissolved gases, and related parameters such as true density of and gas solubility in process liquids, is employed to optimize processing. The amount of gas in a liquid is determined by subjecting a mixture of an incompressible liquid sample and a compressible gas to three or more different equilibrium pressure states, measuring the temperature and volume of the mixture at each of the pressure states, determining the changes in volume of the mixture between at least two different pairs of pressure states, and calculating the amount of gas in the liquid sample. The inventive apparatus includes: a reservoir for process fluid; piping through which fluid may be pumped, the piping being under the control of a pressure regulator which is capable of setting at least three different pressures P1, P2, and P3 in the apparatus; at least three fluid control valves V1, V2, and V3; a pressure gauge; a temperature gauge; and a density gauge.

Description

technical field [0001] The present invention provides an improved control method for flow processing of liquids being treated, providing manufacturing convenience through efficient monitoring of the progress of their handling. The data provided by the present invention can be used to control the gas content in the liquid in an optimal range, such as in the process of paper lamination and in the manufacture of food (ketchup, mayonnaise, syrup), personal protection products (skin care) creams, shampoos), pharmaceuticals, paints, petroleum mixtures, or other similar products. The present invention is useful for optimizing production processes in many industrial fields where information about entrapped or dissolved air and other gases, and their related parameters such as true density of process liquid and gas solubility, is required. Background technique [0002] For various reasons, those skilled in the art of process fluids need to know how much air and / or other gases are en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/00G01N9/00G05D11/02A23L1/24A23L2/00A61K8/00A61Q5/02A61Q19/00D21H19/36A23L27/60A61K8/02A61K8/06A61K8/25A61K8/26A61K8/29A61K9/06A61Q5/00A61Q9/02A61Q11/00G01N7/16G01N15/00
CPCD21H23/78G01N2015/0011G01N7/16D21H19/00
Inventor 陈庆元罗伯特·J·弗兰达
Owner APPLETON PAPERS INC
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