阅读说明：本技术 一种涂料及过滤网的制备方法、抗沾污式废气过滤器 (Preparation method of coating and filter screen and anti-contamination type waste gas filter ) 是由 喻正保 陈敏 史东军 李旺 安蒙 卢洪杰 赵雪源 于 2019-10-14 设计创作，主要内容包括：本发明公开了涂料及过滤网的制备方法、抗沾污式废气过滤器。该涂料的制备方法,包括以下步骤：将氟改性树脂与抗污剂混合,用搅拌机混合均匀,再加入炭黑搅拌均匀,得到漆浆,将漆浆加入研磨设备中,研磨细度至30微米以下,最后加入稀释剂调整黏度。一种使用上述的涂料制备过滤网的方法,包括以下步骤：将所述涂料喷涂到滤网或滤袋上,喷涂后将湿膜样板常温静置,再干燥。本发明又提供一种抗沾污式废气过滤器,包括筒体,所述筒体内设有上述的方法制备的过滤网。本发明为了提高过滤器过滤效率、使用寿命,将滤网外表面涂覆一层长效疏水、疏油涂层,避免频繁清洗过滤器或更换滤网等耗材,将大大提高过滤器使用效率、降低使用成本。(The invention discloses a preparation method of a coating and a filter screen and an anti-contamination type waste gas filter. The preparation method of the coating comprises the following steps: mixing the fluorine modified resin and the anti-fouling agent, uniformly mixing by using a stirrer, adding carbon black, uniformly stirring to obtain paint paste, adding the paint paste into grinding equipment, grinding the paint paste to the fineness of less than 30 micrometers, and finally adding a diluent to adjust the viscosity. A method for preparing a filter screen by using the paint comprises the following steps: and spraying the coating on a filter screen or a filter bag, standing the wet film sample plate at normal temperature after spraying, and drying. The invention also provides an anti-contamination type waste gas filter which comprises a cylinder body, wherein the filter screen prepared by the method is arranged in the cylinder body. In order to improve the filtering efficiency and prolong the service life of the filter, the outer surface of the filter screen is coated with a long-acting hydrophobic and oleophobic coating, thereby avoiding the frequent cleaning of the filter or the replacement of consumables such as the filter screen and the like, greatly improving the use efficiency of the filter and reducing the use cost.)

1. The preparation method of the coating is characterized by comprising the following steps:

mixing the fluorine modified resin and the anti-fouling agent, uniformly mixing by using a stirrer, adding carbon black, uniformly stirring to obtain paint paste, adding the paint paste into grinding equipment, grinding the paint paste to the fineness of less than 30 micrometers, and finally adding a diluent to adjust the viscosity.

2. The preparation method of claim 1, wherein the weight ratio of the fluorine modified resin to the anti-fouling agent is 0.05-20%; the addition amount of the carbon black is 0.5-10 wt%, and the addition amount of the diluent is 0.5-10 wt%.

3. The method of claim 1, wherein the grinding apparatus is a three-roll grinder; the fluorine modified resin is polytetrafluoroethylene, perfluorinated ethylene propylene or polyvinylidene fluoride; the anti-fouling agent is polyurethane water-based resin, a water-based doodling anti-fouling water repellent or an anti-seepage anti-fouling agent; the diluent is selected from an epoxy diluent, an inorganic zinc silicate diluent or a polyurethane diluent.

4. A coating material, characterized by being produced by the production method according to any one of claims 1 to 3.

5. A method of making a filter screen using the coating of claim 4, comprising the steps of:

and spraying the coating on a filter screen or a filter bag, standing the wet film sample plate at normal temperature after spraying, and drying.

6. The method as claimed in claim 5, wherein the coating is sprayed on a filter screen or a filter bag by an air compressor, the standing time is 5-10 min, the coating is placed in a drying box, the coating is heated and cured for 0.5-5 h at 60-150 ℃, and then the coating is taken out and kept at constant temperature and humidity for standby.

7. The method according to claim 5 or 6, wherein the dry film thickness of the paint after spraying is 20-25 μm.

8. An anti-fouling exhaust gas filter comprising a housing having a filter screen formed therein according to the method of claim 5.

9. The contamination-resistant exhaust gas filter according to claim 8, comprising a large particle filter screen, a first filter screen and a second filter screen prepared according to the method of claim 5; the large particle filter screen is a synthetic fiber or glass fiber net coated with the coating, and the first filter screen is an activated carbon fiber net coated with the coating; the second filter screen is a metal porous filter plate coated with the coating;

one end of the cylinder is provided with an air inlet pipe, and the other end of the cylinder is provided with an air outlet pipe; the inner side of the air inlet pipe is provided with a large-particle filter screen, and the inner cavity of the cylinder body is sequentially provided with a first sedimentation cavity, a purification cavity and a second sedimentation cavity; a first filter screen is arranged between the first sedimentation cavity and the purification cavity; a second filter screen is arranged between the purification cavity and the second sedimentation cavity; the bottom of the first settling chamber is provided with a first sewage draining port, the bottom of the second settling chamber is provided with a second sewage draining port, and the lower end of the barrel between the large-particle filter screen and the air inlet pipe is provided with a collecting tank.

10. The contamination-resistant exhaust gas filter according to claim 9, wherein a first microwave generator, an ozone generator, a second microwave generator and a single-layer ceramic porous filter plate are provided in the purifying chamber in this order;

a first water pipe is arranged at the top of the first settling chamber, a plurality of first spray heads are arranged at the lower end of the first water pipe, and the first water pipe is communicated with a water tank arranged on the outer wall of the barrel body; the top of the second settling chamber is provided with a second water pipe, the lower end of the second water pipe is provided with a plurality of second atomizing spray heads, and the second water pipe is communicated with a water tank arranged on the outer wall of the barrel body.

Technical Field

The invention relates to the technical field of waste gas filtration, in particular to a coating, a preparation method of a filter screen and an anti-contamination type waste gas filter.

Background

The pollution and discharge of Volatile Organic Compounds (VOCs) have prominent influence on the atmospheric environment, and the main treatment methods comprise an adsorption method, an absorption method, a condensation method, a membrane separation method, a plasma decomposition method, a catalytic oxidation method, a direct combustion method, a biodegradation method and the like. The former VOCs waste gas contains more solid particles and viscous substance usually, can seriously influence the treatment effect when directly administering, leads to the treatment technique to become invalid completely even, consequently need carry out filtration treatment to VOCs waste gas before administering to get rid of solid particles and viscous substance wherein.

When VOCs waste gas is filtered, a waste gas filter is needed. The waste gas filter is a filtering device and can be divided into a primary filter, a medium-efficiency filter and a high-efficiency filter according to the filtering effect; the filter can be divided into a plate-frame filter, a bag filter, a metal mesh filter, a membrane filter and the like according to the structural form; the used materials mainly comprise novel synthetic fibers, glass fibers, polytetrafluoroethylene, stainless steel, hollow fiber membranes and the like. The exhaust gas filter needs to be cleaned and replaced with new filter materials after running for a certain time, particularly under the conditions of high humidity and existence of viscous pollutants, the filtering efficiency is seriously reduced, even potential safety hazards are caused due to the existence of stains, a large amount of manpower, material resources and financial resources are needed to remove the stains, and articles are inevitably damaged in the process.

In order to solve the problems, a great deal of research work is carried out by many scholars and scientific researchers at home and abroad, the hydrophobic or oleophobic effect is achieved mainly by increasing the roughness of the surface of a coating, for example, the researchers etch the surfaces of metal copper and aluminum by acid and alkali to form a structure with specific roughness, and then obtain the super oleophobic surface after modification by a low surface energy material. However, the increase in roughness of the coating reduces the surface aesthetics of the coating.

Disclosure of Invention

The invention provides an anti-contamination type waste gas filter which can not cause the contamination to remain on the surface of the filter, aiming at solving the defects in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a preparation method of the coating comprises the following steps:

mixing the fluorine modified resin and the anti-fouling agent, uniformly mixing by using a stirrer, adding carbon black, uniformly stirring to obtain paint paste, adding the paint paste into grinding equipment, grinding the paint paste to the fineness of less than 30 micrometers, and finally adding a diluent to adjust the viscosity.

The weight ratio of the fluorine modified resin to the anti-fouling agent is 0.05-20%; the addition amount of the carbon black is 0.5-10 wt%, the addition amount of the diluent is 0.5-10 wt%,

the grinding equipment is a three-roller grinder; the fluorine modified resin is polytetrafluoroethylene, perfluorinated ethylene propylene or polyvinylidene fluoride; the anti-fouling agent is polyurethane water-based resin, a water-based doodling anti-fouling water repellent or an anti-seepage anti-fouling agent; the diluent is selected from an epoxy diluent, an inorganic zinc silicate diluent or a polyurethane diluent.

The invention also provides a coating prepared according to the preparation method.

A method for preparing a filter screen by using the paint comprises the following steps:

and spraying the coating on a filter screen or a filter bag, standing the wet film sample plate at normal temperature after spraying, and drying.

Further, spraying the coating onto a filter screen or a filter bag by using an air compressor, standing for 5-10 min, putting into a drying box, heating and curing at 60-150 ℃ for 0.5-5 h, taking out, and keeping at constant temperature and humidity for later use.

The thickness of the dry film after the coating is sprayed is 20-25 microns.

The present invention also provides an anti-contamination type exhaust gas filter comprising a cylinder in which the filter net prepared according to the method of claim 5 is disposed.

Further, the filter comprises a large-particle filter screen, a first filter screen and a second filter screen which are prepared according to the method; the large particle filter screen is a synthetic fiber or glass fiber net coated with the coating, and the first filter screen is an activated carbon fiber net coated with the coating; the second filter screen is a metal porous filter plate coated with the coating;

one end of the cylinder is provided with an air inlet pipe, and the other end of the cylinder is provided with an air outlet pipe; the inner side of the air inlet pipe is provided with a large-particle filter screen, and the inner cavity of the cylinder body is sequentially provided with a first sedimentation cavity, a purification cavity and a second sedimentation cavity; a first filter screen is arranged between the first sedimentation cavity and the purification cavity; a second filter screen is arranged between the purification cavity and the second sedimentation cavity; the bottom of the first settling chamber is provided with a first sewage draining port, the bottom of the second settling chamber is provided with a second sewage draining port, and the lower end of the barrel between the large-particle filter screen and the air inlet pipe is provided with a collecting tank.

A first microwave generator, an ozone generator, a second microwave generator and a single-layer ceramic porous filter plate are sequentially arranged in the purification cavity;

a first water pipe is arranged at the top of the first settling chamber, a plurality of first spray heads are arranged at the lower end of the first water pipe, and the first water pipe is communicated with a water tank arranged on the outer wall of the barrel body; the top of the second settling chamber is provided with a second water pipe, the lower end of the second water pipe is provided with a plurality of second atomizing spray heads, and the second water pipe is communicated with a water tank arranged on the outer wall of the barrel body.

Compared with the prior art, the invention has the beneficial effects that:

1. after the filter is used for filtering waste gas, solid particles, sticky matters and other pollutants cannot be left on the surface of the filter.

2. The filter of the present invention does not require unpacking for cleaning and frequent replacement of the filter material.

3. The filter greatly reduces the manpower, material resources and financial resources required by the maintenance of the filter and reduces the damage of the filter.

Drawings

Fig. 1 is a schematic structural diagram of an anti-contamination exhaust filter according to an embodiment of the present invention.

In the figure: 1 large granule filter screen, 2 first atomising heads, 3 first sedimentation chambers, 4 first filter screens, 5 first microwave generators, 6 ozone generator, 7 purification chamber, 8 second microwave generators, 9 single-layer ceramic porous filter plates, 10 second atomising heads, 11 second sedimentation chambers, 12 collecting tanks, 13 first drain, 14 second drain, 15 barrels, 16 intake pipes, 17 outlet pipes, 18 second filter screens.

Detailed Description

The invention will be further described with reference to the accompanying drawings, but is not intended to be limited thereto.