CN1583229A - Treatment Methods of Cooking Fume Pollution - Google Patents

Abstract

The invention discloses a method for treating cooking oil fume pollution. The collected cooking oil fume is degraded by a fume degradation catalyst heated to 100-200°C. The oil fume degradation catalyst is prepared by dissolving 100-160 parts of copper sulfate in 500 Add 50-200 parts of kaolin to 1500 parts of water, stir at 30°C-100°C and add 100-300 parts of 10%-80% sodium hydroxide aqueous solution, react for 10-40 minutes, then pour the reactant into water, After the layers are separated, the sedimented product is taken out, dried, and then calcined at 600° C. to 1000° C. for 4 hours to 8 hours. The invention can reduce the harm of cooking oil fume to the environment, and convert the cooking oil fume into environmentally friendly burning fuel.

Description

Treatment Methods of Cooking Fume Pollution

Technical field

The invention relates to a cooking fume treatment method, in particular to a cooking fume pollution control method.

Background technique

In recent years, with the continuous improvement of my country's economic level, the number of various restaurants, restaurants and other catering units has increased dramatically. Its cooking oil fume pollution source has become the third largest air pollution source after industrial pollution sources and traffic pollution sources. Studies have shown that cooking fume has complex components, has certain inhalation toxicity, immunotoxicity and mutagenicity, and has certain hazards to human health. For this reason, the State Environmental Protection Administration promulgated and implemented "The Cooking Fume Emission Standard (Trial)" (GWPB5-2000) in 2000. At present, the main method to solve is to exclude and purify. For example: mechanical oil fume purification equipment, the main advantages are simple equipment, small pressure drop, and the disadvantage is that the removal rate of small particle size particles is low, and the total removal rate is also low. Filter-type oil fume purification equipment has the advantages of high purification rate, stable and reliable operation, and can remove most of the smell of oil fume at the same time. However, due to the high viscosity of the particles captured by the adsorption material, cleaning is more difficult. If a primary adsorption material is used, the cost will be too high. In addition, there are electrostatic, wet and composite. These treatment methods and devices are all based on the design idea of exclusion and purification, which belong to physical treatment methods, and there are problems such as incompleteness, secondary pollution, removal of stains in equipment, and mechanical noise. These drawbacks and problems are difficult to completely solve.

Technical content

The invention provides a treatment method for cooking oil fume pollution which can reduce the environmental harm of cooking oil fume.

The present invention adopts following technical scheme:

The invention relates to a treatment method for cooking oil fume pollution. The collected cooking oil fume is degraded by a fume degradation catalyst heated to 100-200 °C. The preparation of the oil fume degradation catalyst is to dissolve 100-160 parts of copper sulfate in 500- Add 50-200 parts of kaolin to 1500 parts of water, stir at 30-100°C and add 100-300 parts of 10%-80% sodium hydroxide aqueous solution, react for 10-40 minutes, pour the reactant into water, wait After layering, take out the sedimented product, dry it, and then bake it at 600°C to 1000°C for 4 hours to 8 hours.

Compared with the prior art, the present invention has the following beneficial effects:

1. the degradation catalyst of the present invention is that when kaolin is reacted with copper sulfate and sodium hydroxide to generate copper oxide, the components in the kaolin are blended together to form a molecular bond, and the bond is harmful to cooking. The oil fume has a good degradation effect. Because it has the same strength as porcelain through high-temperature sintering, it has good water resistance and corrosion resistance. The preparation method of the present invention can be made into various shapes before high-temperature sintering. It is beneficial to improve the passing speed of oil fume and the effect of degradation reaction. In the present invention, the soot produced during cooking is oxidized with a catalytic degradation catalyst, so that the non-combustible high-boiling point, macromolecular compounds, unsaturated multi-hydrocarbon structural compounds and fine particles condensed together with water vapor are oxidized to form saturated small molecules Low boiling point compounds, which can be used as fuels for environmentally friendly combustion. Verification experiment: take the cooking fumes, condense to obtain 100g of dark brown viscous liquid, heat and distill, collect 50g of distillate at 100-220℃, and 48g of undistilled residue; sample preparation and UV spectrum measurement, the spectrum The picture shows the presence of unsaturated hydrocarbons; the sample is burned on an alcohol lamp, and there is black smoke produced by incomplete combustion. The cooking fume is passed through the catalytic degradation catalyst heated to 100℃～200℃, and then condensed to obtain 100g of condensate. The degraded liquid is yellow, with a trace of water, translucent, and the measured boiling range is 90～ 130°C, the distillate here is 98g, and there is a small amount of yellow liquid with no slagging at the bottom of the bottle. The ultraviolet spectrum of the sample is measured, and the spectrum shows saturated hydrocarbon compounds; the sample is burned on an alcohol lamp, and no black smoke appears. Combustion was complete; the degradation catalyst was weighed to be 100g, and the weight did not increase, indicating that there was no soot retention in the reaction process. ② The present invention has carried out chemical oxidation treatment on the cooking fume due to the use of the catalytic degradation catalyst. The process of cooking and making food by making the stove burn → cook → produce oil fume → oxidize and degrade oil fume → burn the stove becomes a process of self-circulation system, and there is no intermediate emission in this process. It is superior to other physical processing methods. ③The present invention provides energy for cooking and heating while processing oily fumes, so that cooking oily fumes are comprehensively utilized. ④ The degradation catalyst prepared by the present invention is water-resistant and corrosion-resistant because kaolin is added and baked at a high temperature above 600°C. The oily fume has low resistance and will not stay in the process of contacting the catalyst.

Description of drawings

Figure 1 is the UV absorption spectrum before the oil fume is degraded.

Figure 2 is the UV absorption spectrum after the oil fume is degraded.

Specific implementation plan

Embodiment 1: The present invention is a treatment method for cooking oil fume pollution. The collected cooking oil fume is degraded by a soot degradation catalyst heated to 100°C to 200°C. The oil fume degradation catalyst is prepared by adding 100 to 160 parts of copper sulfate Dissolve 500-1500 parts of water, add 50-200 parts of kaolin, stir at 30-100°C and add 100-300 parts of 10%-80% sodium hydroxide aqueous solution, react for 10-40 minutes, pour the reactant into In water, after the layers are separated, take out the sedimented product, dry it, and then bake it at 600°C to 1000°C for 4 hours to 8 hours. In this example, the product should be dried until it can be kneaded. The method can be air-dried, that is: air-dry, knead and shape the product, then dry it at 100°C to 120°C, and knead to form a spherical, square, ring or other irregular shape.

Embodiment 2: The present invention is a treatment method for cooking oil fume pollution. The collected cooking oil fume is degraded by a soot degradation catalyst heated to 100°C to 200°C. The oil fume degradation catalyst is prepared by dissolving 100 parts of copper sulfate in Add 50 parts of kaolin to 500-1500 parts of water, stir at 30°C and add 100 parts of 10% (percentage by weight) sodium hydroxide aqueous solution, react for 10 minutes, pour the reactant into 500ml of water, and after layering, The precipitated product was taken out, dried, and then sintered at 600° C. for 4 hours to obtain 118 g of a cooking oil fume degradation catalyst with a bulk specific gravity of ~0.78 g/cm ³ .

Embodiment 3: The present invention is a treatment method for cooking oil fume pollution. The collected cooking oil fume is degraded by a soot degradation catalyst heated to 100°C to 200°C. The oil fume degradation catalyst is prepared by dissolving 115 parts of copper sulfate in Add 156 parts of kaolin to 700 parts of water, stir at 38° C. and add 150 parts of 22% aqueous sodium hydroxide solution. After reacting for 17 minutes, pour the reactant into 1000 ml of water. After drying, it was further calcined at 680°C for 4.8 hours.

Embodiment 4: The present invention is a treatment method for cooking oil fume pollution. The collected cooking oil fume is degraded by a soot degradation catalyst heated to 100°C to 200°C. The oil fume degradation catalyst is prepared by dissolving 123 parts of copper sulfate in Add 87 parts of kaolin to 800 parts of water, stir at 57° C. and add 170 parts of 30% aqueous sodium hydroxide solution. After reacting for 25 minutes, pour the reactant into 1500 ml of water. After drying, it was further calcined at 765°C for 6.2 hours.

Example 5: The present invention is a treatment method for cooking oil fume pollution. The collected cooking oil fume is degraded by a cooking fume degradation catalyst heated to 100°C to 200°C. The oil fume degradation catalyst is prepared by dissolving 148 parts of copper sulfate in Add 125 parts of kaolin to 900 parts of water, stir at 83° C. and add 210 parts of 35% aqueous sodium hydroxide solution. After reacting for 31 minutes, pour the reactant into 1800 ml of water. After drying, it was burned at 890°C for 6.9 hours.

Embodiment 6: The present invention is a treatment method for cooking oil fume pollution. The collected cooking oil fume is degraded by a soot degradation catalyst heated to 100°C to 200°C. The oil fume degradation catalyst is prepared by dissolving 155 parts of copper sulfate in Add 183 parts of kaolin to 1400 parts of water, stir at 95°C and add 45% aqueous sodium hydroxide solution. After reacting for 37 minutes, pour the reactant into 2000ml of water. , and then sintered at 930 ° C for 7.5 hours.

Embodiment 7: The present invention is a treatment method for cooking oil fume pollution. The collected cooking oil fume is degraded by a soot degradation catalyst heated to 100°C to 200°C. The oil fume degradation catalyst is prepared by dissolving 160 parts of copper sulfate in Add 200 parts of kaolin to 1500 parts of water, stir at 100° C. and add 300 parts of 60% aqueous sodium hydroxide solution. After reacting for 40 minutes, pour the reactant into 2500 ml of water. After drying, it was melted at 1000°C for 8 hours.

Claims (2)

1. A treatment method for cooking oil fume pollution, characterized in that the collected cooking oil fume is degraded by a soot degradation catalyst heated to 100°C to 200°C, and the oil fume degradation catalyst is prepared by dissolving 100 to 160 parts of copper sulfate in Add 50-200 parts of kaolin to 500-1500 parts of water, stir at 30-100°C and add 100-300 parts of 10%-80% sodium hydroxide aqueous solution, react for 10-40 minutes, pour the reactant into water, wait After the layers are separated, the sedimented product is taken out, dried, and calcined at 600° C. to 1000° C. for 4 hours to 8 hours. 2. The cooking fume pollution control method according to claim 1, characterized in that the product is air-dried, kneaded and molded, and then dried at 100°C to 120°C.

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