Water-repellent and oil-proof treatment method and device for filter cloth

Abstract

The invention discloses a water-repellent and oil-proof treatment method and device for filter cloth. The method comprises the steps that water-repellent and oil-proof liquid is prepared, subjected topressurized atomization and uniformly sprayed to the upper and lower surfaces of the filter cloth, and the treated filter cloth is dried. The device comprises winding rollers, a treatment assembly, asolution container, a pressure pump and a setting machine, and the filter cloth sequentially passes through the winding roller, the treatment assembly and the setting machine. The treatment assemblycomprises upper liquid spraying pipes and lower liquid spraying pipes, the upper liquid spraying pipes and the lower liquid spraying pipes are arranged at the upper and lower portions of the filter cloth and connected to a liquid outlet pipe of the pressure pump; the pressure pump is connected with the solution container through a liquid inlet pipe, and the solution container contains the water-repellent and oil-proof liquid. By means of the method and device, the water-repellent and oil-proof effect of the filter cloth is not influenced, and the treatment efficiency and the production efficiency are effectively improved; the method and the device have the advantages that the drying temperature is low, the energy consumption can be reduced, the energy is saved, and the color and harness ofthe product are not influenced; the consumption of water resources in the treatment process is greatly reduced, and the emission of wastewater is reduced.

Description

technical field [0001] The invention relates to the field of filter cloth production for bag-type dust collectors, in particular to a water-repellent and oil-proof treatment method for filter cloth and a device thereof. Background technique [0002] The bag filter is a dry dust filter device suitable for capturing fine, dry, non-fibrous dust. The filter bag is made of textile filter cloth or non-woven felt, and uses the filter function of the fiber fabric to filter the dusty gas. When the dusty gas enters the bag filter, the dust with large particles and large specific gravity will When the air containing fine dust passes through the filter material, the dust will be blocked and the air will be purified. During the dust removal process of the bag filter, if the air humidity is high, the dust will easily adhere to the surface of the filter cloth, and even form hardening in serious cases, which will make the filter performance of the filter cloth invalid. Therefore, the filte...

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Problems solved by technology

At this time, it is necessary to reduce the speed of the sizing machine (4-7m / min) or increase the temperature of the sizing machine (190-240°C) to dry the filter cloth. The amount of water-repellent and oil-repellent fluid fluctuates greatly, resulting in low production efficiency of the impregnation method. high energy consumption

In addition, it also includes the following disadvantages: (1) When the drying temperature is above 210 ° C, the water and oil repellent liquid will change the color and harden the filter cloth, which will affect the use of the filter cloth

(2) The immersion treatment requires a large amount of water, and the water only acts as an intermediary. It needs to be evaporated during the drying process. During the evaporation process, a large induced draft fan needs to be turned on to discharge the water vapor in time. high, consumes water

(3) For filter cloths that are difficult to impregnate, such as PPS, in the continuous production process, the liquid absorption performance is not good, resulting in poor waterproof performance uniformity of the finished filter cloth

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