Catering oil fume purification and deodorization system with active agent-alkyl glycoside

Abstract

The invention provides a catering oil fume purification and deodorization system with an active agent-alkyl glycoside, and belongs to the technical field of environmental protection, the catering oil fume purification and deodorization system comprises a wet condensation oil fume purifier and an induced draft fan; a dosing system; the dosing system comprises a dosing barrel for containing an alkyl glycoside (APG) solution, an outlet of the dosing barrel is connected with a dosing port of a water tank part of a circulating oil-water separation tank matched with the wet-type condensation oil fume purifier, and a dosing electromagnetic valve is arranged on a dosing pipeline and is linked with a water tank electromagnetic water replenishing valve of the circulating oil-water separation tank; an APG solution is fully mixed with water and then reaches a high-pressure atomization spraying device in the purification equipment through a water pump and a high-pressure water pipe, grease and hydrocarbon substances in gas are decomposed by surface activity in foam APG generated after atomization, and the substances are captured and decomposed and mixed with water to flow into an oil-water separation tank. According to the invention, grease and substances with peculiar smell in the oil smoke can be fully captured and separated from the smoke, so that the smoke achieves a good smell removal and deodorization effect.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to a restaurant fume purification and deodorization system with an active agent-alkyl glycoside. Background Art

[0002] The cooking fume in the catering industry refers to the volatile oils, organic matter and their heating decomposition or cracking products released during the cooking and processing of food. The composition of cooking fume is very complex, containing ketones, aldehydes, fatty acids, alcohols, aromatic compounds, heterocyclic compounds, etc. Among them, benzo(a)pyrene, volatile nitrosamines, and heterocyclic amine compounds are known high carcinogens. The form of cooking fume is special, it is an aerosol composed of three phases of gas, solid and liquid. Their particle size is very small, many of which are between 0.1-10um, and they have strong adhesion and can float in the air for a long time. Therefore, these toxic and harmful substances in cooking fume will carry a pungent odor and float in the air. In some areas where high-temperature cooking is the main method, cooking fume is also mixed with a burnt smell. Once these cooking fumes enter the human body with air, they will damage the eyes and respiratory mucosa, and symptoms such as tearing, coughing, conjunctivitis, bronchitis, etc. Long-term and large-scale inhalation of this substance will reduce the human immune function and easily cause lung cancer.

[0003] In recent years, with the continuous improvement of my country's economic level and the rapid development of the catering industry, the number of various hotels and restaurants has increased dramatically, resulting in a large amount of catering fume emissions. The foul odor of fume emissions has become one of the main environmental problems around residents, seriously affecting their normal life and health.

[0004] Traditional methods of restaurant fume purification in the domestic market include centrifugal, filtration, high-voltage electrostatic, etc., but these fume purification methods all have their own shortcomings. Centrifugal purification efficiency is low and it is difficult to meet the purification standards; filtration purification efficiency is higher than centrifugal, but the filter material needs to be replaced frequently, which is expensive, and improper handling of the replaced filter material can easily cause secondary pollution; high-voltage electrostatic, as time goes by, the number of oil particles attached to the electrode increases, the corona decreases, thus affecting the purification effect, and also causing the risk of short circuit fire.

[0005] At present, wet purification uses an aqueous solution with added surfactants for spraying treatment. It is a new type of catering fume purification method that avoids the drawbacks of traditional purification methods. However, among the commonly used additives: sodium alkylbenzene sulfonate (LAS for short) has a low foam viscosity, so the foam is easy to disappear, and therefore has a poor capture and decomposition effect on oil mist molecules; fatty alcohol polyoxyethylene ether (AEO for short) has a low solubility as the water temperature rises, and the purification effect is not ideal for treating high-temperature catering fume waste gas. In addition, AEO will slowly oxidize in the air to produce toxic gases, causing secondary pollution to human health and the air; fatty alcohol polyoxyethylene ether sodium sulfate (AES for short), if improperly mixed with water, is likely to form a highly viscous gel, which is easy to cause nozzle clogging, and the atomization effect of the aqueous solution is poor, resulting in poor purification effect and high operation and maintenance costs. Summary of the invention

[0006] The purpose of the present invention is to provide a restaurant fume purification and deodorization system with an active agent-alkyl glycoside, aiming to solve the problems of poor purification effect and high operation and maintenance cost in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solution: a restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside, comprising:

[0008] Wet condensing fume purifier,

[0009] The induced draft fan is connected to the wet condensing fume purifier through a connecting air duct;

[0010] Among them, the dosing system includes a dosing barrel for containing APG solution, the outlet of the dosing barrel is connected to the dosing port of the water tank part of the circulating oil-water separation box of the wet condensation oil fume purifier, and a dosing solenoid valve is installed on the dosing pipeline to be linked with the water tank solenoid water supply valve of the circulating oil-water separation box. After the APG solution is fully mixed with water, it reaches the high-pressure atomizing spray device inside the purification equipment through a water pump and a high-pressure water pipe. The surface activity of the foam APG generated after atomization decomposes the oil and hydrocarbon substances in the gas, so that these substances are captured and decomposed, mixed with water and flow into the oil-water separation box, and finally achieve a good deodorization effect.

[0011] The preferred embodiment of this scheme is that the concentration of the APG solution is 50% and the pH is 11.5-12.5.

[0012] The preferred embodiment of this scheme is that the dosing solenoid valve is linked with the water tank solenoid water replenishment valve of the circulating oil-water separation tank, so that when the water tank solenoid water replenishment valve of the circulating oil-water separation tank is opened, the dosing solenoid valve is also opened to add APG solution to the water tank.

[0013] The preferred embodiment of this solution is that the induced draft fan introduces the oil fume waste gas into the wet condensation oil fume purifier, and the oil fume waste gas is cooled by condensation inside the wet condensation oil fume purifier and changes from gas to liquid.

[0014] The preferred embodiment of this solution is that the oil fume waste gas is concentrated and combined by the centrifugal degreasing system and the atomization capture system inside the wet condensation oil fume purifier.

[0015] The preferred embodiment of this solution is that under the effect of viscosity and tension of the liquid water, the pollutants are quickly captured and discharged into the oil-water separation box.

[0016] The preferred embodiment of this scheme is that the aromatic gas in the oil fume exhaust gas can be removed by removing the hydrocarbon substances and the pungent burnt smell generated by the seasoning during the high-heat cooking process.

[0017] The preferred embodiment of this scheme is that the APG is in the form of white solid powder or light yellow oily liquid, and its molecules are composed of a hydrophobic group (alkyl) and a hydrophilic group (polyhydroxyglycoside).

[0018] The preferred embodiment of this scheme is that the hydrophilic group and the hydrophobic group in the APG molecule interact with water and oil respectively. When APG is dissolved in water, the hydrophilic group faces the water surface, while the hydrophobic group faces the air.

[0019] The preferred embodiment of this scheme is that: under the combined action of the oil fume waste gas, the oil fume pollutants collide with the atomized water molecules and the condenser and are rapidly condensed and cooled, changing from gas to liquid.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The restaurant fume purification and deodorization system with active agent-alkyl polyglycoside has a large solubility in water, is easy to dilute, and has no gel phenomenon. Therefore, it can be fully mixed with tap water in the circulating water tank, will not block the nozzle, and reduce the cleaning and maintenance costs. The addition of APG can make the aqueous solution produce a large amount of fine foam during the high-pressure atomization process. These foams can fully capture the grease and odorous substances in the fume, separate them from the smoke, and achieve a good deodorization and deodorization effect on the smoke.

[0022] 2. The catering fume purification and deodorization system with the active agent-alkyl polyglycoside has a long alkyl carbon chain, low surface tension, and high activity. It can effectively reduce the surface tension of oil in water, making it easier to dissolve and disperse in water, thereby easily removing oil from the fume gas and the surface of the internal components of the purifier. The high surface activity of the APG component in the water mist and foam can quickly decompose the oil and hydrocarbon substances in the gas. The decomposed substances are mixed with water and flow into the oil-water separation box, further improving the deodorization and deodorization treatment efficiency. APG itself is non-toxic, harmless, non-irritating to the skin, and does not produce toxic byproducts. It has good compatibility and biodegradability in biological systems and is harmless to the environment and human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the restaurant fume purification and deodorization system with the active agent-alkyl glycoside of the present invention;

[0025] Figure 2 The table shows the purification efficiency of the mixed liquid in the present invention on oil mist and odor in exhaust gas.

[0026] In the figure: 1. Wet condensing oil fume purifier; 2. induced draft fan; 3. dosing barrel; 4. circulating oil-water separation box; 5. dosing solenoid valve; 6. water tank solenoid water supply valve; 7. water pump; 8. high-pressure atomizing spray device. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example

[0029] See also Figure 1-Figure 2 The present invention provides the following technical solution: a restaurant fume purification and deodorization system with an active agent-alkyl glycoside, comprising:

[0030] Wet condensing fume purifier 1.

[0031] The induced draft fan 2 is connected to the wet condensing fume purifier 1 through a connecting air duct;

[0032] Among them, the dosing system includes a dosing barrel 3 for containing APG solution, the outlet of the dosing barrel 3 is connected to the dosing port of the water tank part of the circulating oil-water separation box 4 of the wet condensation oil fume purifier 1, and a dosing solenoid valve 5 is installed on the dosing pipeline to be linked with the water tank solenoid water replenishing valve 6 of the circulating oil-water separation box 4. After the APG solution is fully mixed with water, it reaches the high-pressure atomizing spray device 8 inside the purification equipment through a water pump 7 and a high-pressure water pipe. The surface activity of the foam APG generated after atomization decomposes the grease and hydrocarbon substances in the gas, so that these substances are captured and decomposed, mixed with water and flow into the oil-water separation box, and finally achieve a good deodorization effect.

[0033] In this embodiment: the concentration of the APG solution is 50%, and the pH is 11.5-12.5.

[0034] This embodiment is an example of oil fume waste gas treatment. The waste gas is the purification of oil mist generated in the production process of the catering industry, and the waste gas exhaust volume is 30,000 m3 / h.

[0035] In this embodiment, the dosing solenoid valve 5 is linked with the water tank solenoid water replenishment valve 6 of the circulating oil-water separation box 4, so that when the water tank solenoid water replenishment valve 6 of the circulating oil-water separation box 4 is opened, the dosing solenoid valve 5 is opened at the same time to add APG solution to the water tank.

[0036] In this embodiment, the exhaust fan 2 introduces the oil fume waste gas into the wet condensation oil fume purifier 1, and the oil fume waste gas is cooled by condensation inside the wet condensation oil fume purifier 1, and is converted from gas to liquid.

[0037] In this embodiment, the oil fume exhaust gas is concentrated and combined by the centrifugal degreasing system and the atomization capture system inside the wet condensation oil fume purifier 1.

[0038] In this embodiment: under the action of viscosity and tension of liquid water, pollutants are quickly captured and discharged into the oil-water separation box.

[0039] In this embodiment, the aromatic gas in the cooking fume exhaust gas can be removed by removing the hydrocarbon substances and the pungent burnt smell generated by the seasoning during the high-heat cooking process.

[0040] In this embodiment: APG appears as white solid powder or light yellow oily liquid, and its molecules are composed of hydrophobic groups (alkyl groups) and hydrophilic groups (polyhydroxyglycosides).

[0041] In this embodiment, the hydrophilic group and the hydrophobic group in the APG molecule interact with water and oil respectively. When APG is dissolved in water, the hydrophilic group faces the water surface, while the hydrophobic group faces the air.

[0042] In this embodiment, under the combined action of the oil fume exhaust gas, the oil fume pollutants collide with the atomized water molecules and the condenser and are rapidly condensed and cooled, changing from gas to liquid.

[0043] The concentration of the original APG solution in the dosing barrel of this embodiment is 50%, and the pH is between 11.5-12.5 (calculated as pH=12). The original APG solution is added to the circulating water tank of the wet purification system for restaurant fume, and the original APG solution is mixed with the tap water in the water tank in a certain proportion (0.1%-5.0%). The mixed liquid enters the wet condensation fume purifier and is atomized to capture and purify the fume and odor. After testing, the purification efficiency of various proportions of mixed liquids on oil mist and odor in exhaust gas is as follows Figure 2 As shown (Note: the ratio of 0.1% means that 0.1g of original APG solution is mixed with 100g of tap water).

[0044] Through the above engineering implementation related test data, it can be known that when the ratio of the original APG solution of the present invention to the tap water in the water tank is about 0.5%, the pH is 9-10, and the deodorization and deodorization ability of the restaurant oil fume and the oil mist purification ability are significantly improved. The odor concentration after purification can be reduced to 15 (dimensionless), which is far lower than the emission limit of 80 (dimensionless) of the most stringent local standard, and the oil mist concentration after purification can be reduced to 0.12mg / m3, which is also lower than the national emission limit of 2.0mg / m3 and the emission limit of 1.0mg / m3 required by the most stringent local requirements, so it can be widely promoted and used in engineering projects. In addition, since the foam generated by APG will increase the wind resistance of the system, under the condition of ensuring the deodorization and deodorization purification effect, the concentration of APG in the mixed liquid should not be too large. Too high APG concentration will produce more foam, too large system resistance, high energy consumption, and may cause poor ventilation of the system. Therefore, the mixing ratio of the original APG solution and tap water is generally 0.5%, and the efficiency of deodorization, deodorization and oil mist purification can reach 99%, which is much higher than the relevant emission standards.

[0045] In this embodiment: APG has a unique molecular structure and excellent physical and chemical properties, and has multiple advantages in the wet purification process of restaurant fume. The specific advantages are as follows:

[0046] APG has high solubility. APG usually appears as a white solid powder or a light yellow oily liquid. Its molecules are composed of hydrophobic groups (alkyl groups) and hydrophilic groups (polyhydroxyglycosides). The hydrophobic groups can interact with non-polar molecules in water, while the hydrophilic groups form hydrogen bonds with water molecules. This interaction helps APG form a stable structure in water, thereby increasing its solubility. At the same time, APG is easy to dilute, has no gelation phenomenon, and is convenient to use.

[0047] APG has good foaming properties. As a nonionic surfactant, the hydrophilic and hydrophobic groups in the APG molecule interact with water and oil respectively, and this interaction helps to form foam. Specifically, when APG is dissolved in water, its hydrophilic groups face the water surface, while the hydrophobic groups face the air, and this arrangement helps to form a stable foam layer.

[0048] APG has low surface tension and strong activity. The APG molecular structure contains hydrophilic groups and hydrophobic groups. This structure makes APG have good emulsification and decontamination capabilities. APG can effectively reduce the surface tension of grease in water. After the large molecules of oil mist are captured by foam, they are decomposed into small molecules under the action of APG, and finally dissolved and dispersed in water, so as to easily remove and decompose grease from the gas and the surface of objects.

[0049] APG is highly safe. APG has good biodegradability and can be quickly decomposed by microorganisms in the environment, which is environmentally friendly. Because of the natural sugar groups in its molecular structure, APG has low irritation to human skin and eyes and is safe to use.

[0050] Working principle: the restaurant fume purification and deodorization system with active agent-alkyl glycoside, the induced draft fan 2 introduces the fume exhaust gas into the wet condensation fume purifier 1. Under the combined action of the centrifugal degreasing system and the atomization capture system inside the wet condensation fume purifier 1, the fume pollutants collide with the atomized water molecules and the condenser and are quickly condensed and cooled, changing from gas to liquid. Under the viscosity and tension of liquid water, the pollutants are quickly captured and discharged into the oil-water separation box. In order to remove aromatic gases in the fume exhaust gas, hydrocarbon substances and pungent burnt odors generated by various seasonings during high-temperature cooking, improve the capture efficiency of oil mist molecules, reduce the emission of fume molecules, non-methane total hydrocarbons, and carbonized particulate matter, and increase the dosing system. The dosing barrel 3 is filled with an APG solution with a concentration of 50%. The outlet of the dosing barrel 3 is led to the dosing port of the water tank of the circulating oil-water separation box 4 of the wet condensing oil fume purifier 1, and a dosing solenoid valve 5 is installed on the dosing pipeline to be linked with the water tank solenoid water replenishing valve 6 of the circulating oil-water separation box 4, that is, when the water tank solenoid water replenishing valve 6 of the circulating oil-water separation box 4 is opened, the dosing solenoid valve 5 is opened at the same time to add the APG solution to the water tank. After the APG solution is fully mixed with water, it reaches the high-pressure atomizing spray device 8 inside the purification equipment through the water pump 7 and the high-pressure water pipe for atomization. After atomization, a large amount of fine foam is generated. The surface activity in the APG quickly decomposes the grease and hydrocarbon substances in the gas, so that these harmful substances are fully captured and decomposed, mixed with water and flow into the oil-water separation box, and finally achieve a good deodorization and deodorization effect.

[0051] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside, characterized in that: include: Wet condensing fume purifier (1), An induced draft fan (2) is connected to the wet condensing fume purifier (1) via a connecting air duct; The dosing system comprises a dosing barrel (3) for containing APG solution, an outlet of the dosing barrel (3) connected to a dosing port of a water tank portion of a circulating oil-water separation box (4) matched with a wet condensing fume purifier (1), and a dosing solenoid valve (5) installed on the dosing pipeline to be linked with a water tank solenoid water replenishment valve (6) of the circulating oil-water separation box (4). After the APG solution is fully mixed with water, it reaches a high-pressure atomizing spray device (8) inside the purification equipment through a water pump (7) and a high-pressure water pipe. The surface activity of the foamed APG generated after atomization decomposes grease and hydrocarbon substances in the gas, so that these substances are captured and decomposed, and mixed with water and flow into the oil-water separation box.

2. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside according to claim 1, characterized in that: The concentration of the APG solution is 50%, and the pH value is 11.5-12.

5.

3. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside according to claim 2, characterized in that: The dosing solenoid valve (5) is linked with the water tank solenoid water replenishment valve (6) of the circulating oil-water separation box (4), so that when the water tank solenoid water replenishment valve (6) of the circulating oil-water separation box (4) is opened, the dosing solenoid valve (5) is opened at the same time to add APG solution into the water tank.

4. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside according to claim 3, characterized in that: The induced draft fan (2) introduces the oil fume waste gas into the wet condensation oil fume purifier (1), and the oil fume waste gas is cooled by condensation inside the wet condensation oil fume purifier (1), and is converted from a gaseous state to a liquid state.

5. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside according to claim 4, characterized in that: The oil fume waste gas is concentrated and combined by the centrifugal degreasing system and the atomization capture system inside the wet condensation oil fume purifier (1).

6. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside according to claim 5, characterized in that: Under the effect of viscosity and tension of the liquid water, the pollutants are quickly captured and discharged into the oil-water separation box.

7. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside according to claim 6, characterized in that: The aromatic gas in the exhaust gas can be removed by removing the hydrocarbons and pungent burnt smell produced by seasonings during high-heat cooking.

8. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside according to claim 7, characterized in that: The APG appears as white solid powder or light yellow oily liquid, and its molecules are composed of hydrophobic groups and hydrophilic groups.

9. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside according to claim 8, characterized in that: The hydrophilic group and the hydrophobic group in the APG molecule interact with water and oil respectively. When APG is dissolved in water, the hydrophilic group faces the water surface, while the hydrophobic group faces the air.

10. A restaurant fume purification and deodorization system with an active agent-alkyl polyglycoside according to claim 5, characterized in that: Under the combined action of the oil fume waste gas, the oil fume pollutants collide with the atomized water molecules and the condenser and are rapidly condensed and cooled, changing from gas to liquid.

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