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Condensation type demister having vanes with non-uniform wettability and preparation method of vanes

A wettability and non-uniform technology, which is applied in the energy-saving device for eliminating liquid droplets and fine particles in wet flue gas, the preparation of condensing demisters and blades, and the field of eliminating white smoke in wet flue gas, so as to achieve less power consumption, Reduction of heat dissipation and significant energy-saving advantages

Active Publication Date: 2020-02-11
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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  • Condensation type demister having vanes with non-uniform wettability and preparation method of vanes
  • Condensation type demister having vanes with non-uniform wettability and preparation method of vanes
  • Condensation type demister having vanes with non-uniform wettability and preparation method of vanes

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Experimental program
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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. Wash the titanium blades by immersing them 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 sputteri...

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Abstract

The invention discloses a condensation type demister having vanes with non-uniform wettability and a preparation method of vanes. The condensation type demister comprises multiple sets of condensationdemisting vanes arranged at intervals, an upper frame, a lower frame, a cooling water inlet welded to the lower frame and a cooling water outlet welded to the upper frame, wherein the upper frame andthe lower frame are used for fixing the vanes and providing cooling water channels; the vanes are each of a hollow corrugated structure; and through holes connected with a cooling water outlet pipe and a cooling water inlet pipe are formed in the upper portions and the lower portions of the vanes respectively; and the vanes are metal or metal alloy vanes. According to the invention, the surfacesof the vanes are covered with mask plates; the exposed surfaces of the vanes are modified with a low-surface-energy substance for treatment after rough structures are constructed on the exposed surfaces, so the exposed surfaces have super-hydrophobicity and the covered parts have hydrophilicity; and therefore, the vanes have the characteristic of hydrophilicity-hydrophobicity combined non-uniformwettability.

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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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
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