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Process and device for cleaning sintered metal mesh

A technology of metal sintered mesh and cleaning device, which is applied in the directions of cleaning methods, cleaning methods and utensils, chemical instruments and methods using liquids, etc. The effect of adjustable efficiency, high degree of automation and simple operation

Inactive Publication Date: 2011-06-29
ZHONGYUAN ENGINEERING COLLEGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional cleaning method: the removed KKF mesh is generally placed in a plastic tank with the same area (or slightly larger) as the mesh, and soaked in caustic soda solution. In fact, the attachments in the mesh are difficult to peel off, so there is no reuse value
Disadvantages of traditional cleaning methods: 1. Impurities such as fine fiber fragments cannot be cleaned; 2. Resin colloid impurities cannot be cleaned; 3. The area of ​​the treatment tank is large, occupying space and wasting cleaning fluid
[0004] Although the commonly used chemical soaking method has a certain cleaning effect, the chemical cleaning solution cannot be recycled. There are many kinds of chemical components remaining in the cleaning waste liquid, and the content is high. It is necessary to prepare new cleaning liquid frequently, which is a big waste.
The soaking tank takes up a lot of space, and the liquid surface is exposed to the air, so the cleaning solution is easily contaminated
In addition, for complex shapes with three-dimensional holes, the cleaning effect of KKF metal mesh is very poor, and for inorganic mechanical impurities, the cleaning effect is even less ideal
[0005] The actual investigation found that although KKF metal mesh has been widely used as filter material in the production of viscose fiber, most of them have not been chemically cleaned, which is a typical "teardown and throw away". big waste

Method used

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  • Process and device for cleaning sintered metal mesh
  • Process and device for cleaning sintered metal mesh
  • Process and device for cleaning sintered metal mesh

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Chemical formula of cleaning solution: oxidizing cleaning solution formula (weight ratio): 0.50% of soda powder, 0.25% of diesel oil, 0.15% of sodium hydroxide, 0.05% of potassium permanganate, 0.05% of surfactant, and the rest is water; b) solvent / Rinse solution: deionized demineralized water.

[0040] The temperature of the cleaning solution is 24°C; the temperature of the rinse solution is 16°C.

[0041] The specification of KKF metal mesh is 1495mm in length, 870mm in width, and the micropore diameter is 15μm. After a certain period of online operation, the number of backwashing increases and the pressure loss increases, which proves that the filtration efficiency decreases.

[0042] Cleaning and processing the above-mentioned metal mesh polluted, the technological process is as follows figure 1 As shown, implement the device as figure 2 shown. The cleaning tank length × width × depth is 950mm × 650mm × 250mm. There are 90 vibrators in the ultrasonic generat...

Embodiment 2

[0046] Chemical formula of cleaning solution: Oxidation cleaning solution formula (weight ratio): 0.50% of soda powder, 0.25% of diesel oil, 0.25% of sodium hydroxide, 0.05% of washing powder, 0.05% of surfactant, the rest is water, and the temperature of cleaning solution is 24°C ; b) Solvent / rinsing liquid: 0.02% washing powder, the rest deionized demineralized water, the temperature of the rinsing liquid is 16°C.

[0047] The specification of KKF metal mesh is 1495mm in length, 870mm in width, and the micropore diameter is 25μm. After a certain period of online operation, the number of backwashing increases and the pressure loss increases, which proves that the filtration efficiency decreases.

[0048] Cleaning and processing the above-mentioned metal mesh polluted, the technological process is as follows figure 1 As shown, the equipment to realize this process is as follows figure 2 shown. The cleaning tank length × width × depth is 950mm × 650mm × 250mm. There are 90...

Embodiment 3

[0052] The chemical formula of the cleaning solution: a) Oxidation cleaning solution formula: 0.1% (weight ratio) of potassium permanganate, 0.1% (weight ratio) of sulfuric acid, and the rest is water; b) Reduction cleaning solution formula: 0.1% (weight ratio) of oxalic acid , citric acid 0.1% (weight ratio), the rest is water; c) solvent / rinse: deionized demineralized water.

[0053] Process operation control condition is the same as embodiment 1. The cleaning object is the combined spinneret assembly for spinning and forming. This process operation is divided into four steps. The first step is ultrasonic / alkaline solution oxidation. Under the condition of pH=12.5, the dirty spinneret assembly pre-washed with clean water is reacted with the oxidation cleaning solution for 4 hours; the second The first step is ultrasonic / deionized demineralized water rinsing, and deionized demineralized water is used to ultrasonically rinse the spinneret assembly after chemical cleaning for ...

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Abstract

The invention relates to a process and a device for cleaning a sintered metal mesh. The process comprises the following steps of: soaking with aqueous solution containing an extracting agent; rinsing the metal mesh with softened water under the action of ultrasonic waves; and drying the metal mesh with filtered hot air. The device comprises a rinse tank and a control cabinet; the bottom of the rinse tank is provided with a plurality of vibrators capable of generating ultrasonic waves; one side of the rinse tank is provided with a pure liquid tank; a clapboard is arranged between the rinse tank and the pure liquid tank; a blow-off pipe is arranged on the lower part of the rinse tank and is connected with a three-way valve; one side of the three-way valve is horizontally connected with the pure liquid tank, while the other side is provided with the blow-off pipe; the upper end of the side face of the rinse tank is provided with an overflow gate which is connected with a chemical cleaning solution filter through a pipeline; the upper end of the rinse tank is provided with rotating hubs for fixing the metal mesh; and two axle heads of each rotating hub are positioned at two ends of the rinse tank, and one of the axle heads is connected with a drive motor. The invention solves the problem of cleaning the sintered metal mesh, has the characteristics of high efficiency, safety, a few secondary wastes and the like, and can be widely applied to cleaning spinning solution filter screens in chemical fiber production.

Description

technical field [0001] The invention relates to a cleaning process and a device for a metal sintered net, and is especially suitable for a cleaning process and a device for a metal sintered net used in a spinning solution filter for viscose fiber production. Background technique [0002] KKF filter is the most widely used filter equipment for viscose fiber production, among which KKF metal mesh is the core component of this filter equipment, which is composed of three parts: support mesh, filter mesh and protection mesh. Metal fibers are sintered to form three-dimensional micropores of 10-50 μm. The size of the pores affects the filtration capacity and separation effect, so KKF metal mesh is an important part to ensure the quality and quantity of spinning solution. During the working process, due to the working environment conditions, the cleanliness of the filter medium and the mesh itself has a certain three-dimensional effect, the mesh will absorb fine fibers, resins and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/14B08B3/12
Inventor 张瑞文郑军平张济洲郭晓震马伟华
Owner ZHONGYUAN ENGINEERING COLLEGE