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Condensing mist eliminator with blades with non-uniform wettability and preparation method of blades

A wettability and non-uniform technology, applied in the fields of eliminating white smoke from wet flue gas, energy-saving devices for eliminating liquid droplets and fine particles in wet flue gas, condensing demister and blade preparation, to achieve high heat transfer performance , high condensation efficiency, energy saving effect

Active Publication Date: 2021-08-13
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a condensing demister with non-uniform wettability blades and a preparation method of the blades, which can be used to condense and purify saturated wet flue gas containing small-sized liquid droplets and other fine particles after desulfurization. Wet flue gas is very important for the secondary carrying of fine particles, the realization of ultra-clean emission of fine particles and whitening of flue gas, and it can also recover part of the heat energy

Method used

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  • Condensing mist eliminator with blades with non-uniform wettability and preparation method of blades
  • Condensing mist eliminator with blades with non-uniform wettability and preparation method of blades
  • Condensing mist eliminator with blades with non-uniform wettability and preparation method of blades

Examples

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Effect test

Embodiment 1

[0052] A method for preparing blades with non-uniform wettability, comprising the following steps:

[0053] Step 1. Cleaning: Rinse the aluminum blade with ethanol solution and deionized water to remove oil and floating dust on the surface, and then dry it for later use.

[0054] Step 2. Fabricate a rough structure on the exposed surface of the blade not covered by the mask:

[0055] Cover the dried blade with the mask plate with the designed pattern, soak the blade covered with the grinding plate in a NaOH solution with a temperature of 40 ° C and a concentration of 0.5 mol / L for 1 hour, take it out, and wash it with ethanol solution and deionized water Soak and clean the leaves, then soak the leaves in a hot water pool at 95°C for 2 hours, take them out and dry them.

[0056] Step 3, grafting low surface energy substances onto the surface of the rough structure:

[0057] After immersing the dried leaves in a 1% fluorosilane ethanol solution at a temperature of 50°C for 1 h...

Embodiment 2

[0061] A method for preparing blades with non-uniform wettability, comprising the following steps:

[0062] Step 1. Grind the stainless steel blade with sandpaper from small to large meshes to remove the oxide layer, then rinse with ethanol solution and deionized water to remove oil and floating dust on the surface, and then dry it for later use.

[0063] Step 2. Cover the dried leaves with the mask plate with the designed pattern, use HGL laser processing equipment, the working voltage is 220V, the focal length can be adjusted in the range of 140-180mm, the output current is 11-12A, and the diameter of the irradiation spot is 20 -30μm, the processing method is diamond-shaped grid linear processing, and the processing distance is 120μm.

[0064] Step 3. Put the blades into ethanol and pure water for ultrasonic cleaning for 5 minutes in order to remove impurities produced by laser processing. Afterwards, the cleaned leaves were immersed in a 3% stearyl mercaptan solution for 2...

Embodiment 3

[0067] A method for preparing blades with non-uniform wettability, comprising the following steps:

[0068] Step 1. Immerse the titanium blades in a low-concentration acid solution for 15 minutes to remove natural oxides and impurities on the surface, then rinse them with ethanol and deionized water in sequence to remove oil and floating dust on the surface, and then dry them for later use.

[0069] Step 2. Tightly cover the mask plate with the designed pattern on the surface of the blade, and vertically immerse it in the 0.05mol / L NaOH electrolyte solution as the anode, use the platinum plate as the cathode facing the mask blade, adjust the current and electrolysis Time to prepare micro-nano structures.

[0070] Step 3. Put the anodized leaves into ethanol and pure water for ultrasonic cleaning for 5 minutes, then dry them, then put them into a magnetron sputtering machine and fix them. The sputtering target material is polytetrafluoroethylene, and the sputtering time is 20m...

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Abstract

The invention discloses a condensing demister with blades with non-uniform wettability and a preparation method for the blades, which include a plurality of sets of condensing demister blades arranged at intervals, upper and lower frames for fixing the blades and providing cooling water passages, welded to the The cooling water inlet of the lower frame and the cooling water outlet welded to the upper frame; the blade is a hollow corrugated structure, and the upper and lower sides of the blade are respectively opened with through holes connected with the cooling water outlet and inlet pipe; the blade is made of metal or metal Alloy blade, by covering the surface of the blade with a mask plate, modifying the low surface energy material treatment after constructing a rough structure on the exposed surface, so that the exposed surface has super-hydrophobic properties, while the covered part has hydrophilic properties, so that the blade has a hydrophilic-hydrophobic combination non-uniform wettability properties.

Description

technical field [0001] The invention belongs to the technical field of energy saving and environmental protection, and relates to an energy-saving device for eliminating white smoke in wet flue gas, liquid droplets and fine particles in wet flue gas, in particular to a condensing demister with non-uniform wettability blades and Method of preparation of leaves. Background technique [0002] my country is a big coal-fired power generation country, and the flue gas generated by coal-fired power generation is one of the main air pollutants in our country. In order to respond to environmental protection requirements, it is imperative to reduce flue gas pollution. In the field of flue gas treatment, the wet desulfurization process has become the most widely used and longest-lasting flue gas treatment technology in my country because of its mature and reliable process, high desulfurization efficiency, and low treatment cost. [0003] However, in the wet desulfurization process, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/00B01D47/00
CPCB01D47/00B01D53/002B01D2258/0283
Inventor 齐宝金魏进家崔晨乙袁甲王雅
Owner XI AN JIAOTONG UNIV