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

Abstract

The utility model provides a catering oil fume purification and deodorization system with an active agent-alkyl glycoside, which belongs to the technical field of environmental protection and 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 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 utility model, 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] This utility model belongs to the field of environmental protection technology, specifically relating to a catering fume purification and deodorization system with an active agent - alkyl glycoside. Background Technology

[0002] Restaurant fumes refer to the volatile oils, organic matter, and their thermal decomposition or pyrolysis products released during food cooking and processing. The composition of cooking fumes is very complex, containing ketones, aldehydes, fatty acids, alcohols, aromatic compounds, heterocyclic compounds, etc., among which benzo(a)pyrene, volatile nitrosamines, and heterocyclic amines are known to be highly carcinogenic. Cooking fumes have a unique form, being an aerosol composed of gas, solid, and liquid phases. Their particle size is very small, many ranging from 0.1 to 10 μm, and they are highly adhesive, allowing them to remain suspended in the air for extended periods. Therefore, these toxic and harmful substances in cooking fumes carry a pungent odor and disperse throughout the air. In areas where high-temperature cooking methods are prevalent, the fumes also contain a burnt smell. Once these fumes enter the human body, they can damage the mucous membranes of the eyes and respiratory tract, causing symptoms such as tearing, coughing, conjunctivitis, and bronchitis. Long-term inhalation of large amounts of these substances can reduce the body's immune function and increase the risk of 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 restaurants and eateries has increased dramatically, resulting in a large amount of cooking fumes being emitted. The foul odor from these fumes has become one of the major environmental problems affecting residents, seriously impacting their normal lives and health.

[0004] Traditional methods for purifying restaurant fumes in the domestic market include centrifugal, filtration, and high-voltage electrostatic methods, but each of these methods has its own drawbacks. Centrifugal purification is inefficient and fails to meet purification standards; filtration is more efficient than centrifugal, but requires frequent filter replacement, is expensive, and improper disposal of the replaced filter can easily cause secondary pollution; with high-voltage electrostatic methods, over time, more oil particles adhere to the electrodes, reducing the corona discharge and affecting the purification effect, and also posing a risk of short circuits and fires.

[0005] Currently, wet scrubbing uses aqueous solutions with added surfactants for spraying, a novel method for purifying restaurant fumes that avoids the drawbacks of traditional methods. However, among commonly used additives: sodium alkylbenzene sulfonate (LAS) produces foam with low viscosity, making the foam easily disappear and resulting in poor capture and decomposition of oil mist molecules; fatty alcohol polyoxyethylene ether (AEO) has decreased solubility as water temperature increases, making it unsatisfactory for treating high-temperature restaurant fumes. Furthermore, AEO slowly oxidizes in the air, producing toxic gases that cause secondary pollution to human health and the air; sodium fatty alcohol polyoxyethylene ether sulfate (AES), if improperly mixed with water, easily forms a highly viscous gel, which can clog nozzles, resulting in poor atomization of the aqueous solution, poor purification performance, and high maintenance costs. Summary of the Invention

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

[0007] To achieve the above objectives, this utility model provides the following technical solution: a catering fume purification and deodorization system with an active agent - alkyl glycoside, comprising:

[0008] Wet condenser oil fume purifier

[0009] An exhaust fan is connected to a wet condenser fume purifier via connecting ducts;

[0010] The system also includes a dosing system, which consists of a dosing tank containing APG solution, a dosing port in the water tank of the circulating oil-water separator that connects to the outlet of the dosing tank, and a dosing solenoid valve installed on the dosing pipeline that is linked to the solenoid water supply valve of the circulating oil-water separator. After the APG solution is fully mixed with water, it is pumped and delivered to the high-pressure atomizing spray device inside the purification equipment through a water pump and a high-pressure water pipe. The surface-active decomposition gases in the foam APG produced after atomization decompose the oils and hydrocarbons, causing these substances to be captured and decomposed, mixed with water and flowing into the oil-water separator, ultimately achieving a good deodorization and odor removal 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] In this preferred embodiment, the dosing solenoid valve is linked with the water tank solenoid valve of the circulating oil-water separator, so that when the water tank solenoid valve of the circulating oil-water separator is opened, the dosing solenoid valve is opened simultaneously to add APG solution to the water tank.

[0013] In this preferred embodiment, the induced draft fan introduces the oil fume exhaust gas into the wet condenser oil fume purifier, where the oil fume exhaust gas is cooled by condensation and changes from a gaseous state to a liquid state.

[0014] In this preferred embodiment, the oily fume exhaust gas is subjected to a combined action of a centrifugal degreasing system and an atomization collection system inside the wet condenser oil fume purifier.

[0015] The preferred embodiment of this scheme is that, under the action of viscosity and surface tension of the liquid water in the atomization collection system, pollutants are rapidly collected and discharged into the oil-water separator.

[0016] The preferred method of this solution is to remove aromatic gases from cooking fumes by utilizing the hydrocarbons and pungent burnt odors produced by seasonings during high-heat cooking.

[0017] The preferred embodiment of this scheme is that the APG is a white solid powder or a pale yellow oily liquid, and its molecules are composed of hydrophobic groups (alkyl groups) and hydrophilic groups (polyhydroxy glycosides).

[0018] In this preferred embodiment, the hydrophilic and hydrophobic groups in the APG molecule interact with water and oil, respectively. When APG dissolves in water, its hydrophilic groups face the water surface, while its hydrophobic groups face the air.

[0019] In this preferred 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 a gaseous state to a liquid state.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This catering fume purification and deodorization system, featuring the active agent alkyl glycoside (APG), utilizes APG's high water solubility, easy dilution, and lack of gelation. Therefore, it can be thoroughly mixed with tap water in the circulating water tank without clogging the nozzles, reducing cleaning and maintenance costs. The addition of APG generates a large amount of fine foam during high-pressure atomization. This foam effectively captures grease and odor-causing substances in the fumes, separating them from the smoke and achieving excellent deodorization.

[0022] 2. This catering fume purification and deodorization system, featuring the active agent alkyl glycosides (APG), utilizes the long alkyl carbon chain of APG, resulting in low surface tension and high activity. APG effectively reduces the surface tension of grease in water, making it easier to dissolve and disperse. This facilitates the removal of grease from the fume gas and the surfaces of internal components of the purifier. The high surface activity of APG in the water mist and foam rapidly decomposes grease and hydrocarbons in the gas. The decomposed substances mix with water and flow into the oil-water separation tank, further improving the deodorization efficiency. APG itself is non-toxic, harmless, and non-irritating to the skin, does not produce toxic byproducts, and exhibits good compatibility and biodegradability in biological systems, making it harmless to the environment and human health. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the catering fume purification and deodorization system with active agent-alkyl glycoside of this utility model;

[0025] Figure 2 This table shows the purification efficiency of the mixed liquid in this invention for oil mist and odor in exhaust gas.

[0026] In the diagram: 1. Wet condenser oil fume purifier; 2. Exhaust fan; 3. Dosing tank; 4. Circulating oil-water separator; 5. Dosing solenoid valve; 6. Water tank solenoid water supply valve; 7. Water pump; 8. High-pressure atomizing spray device. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0028] Please see Figures 1-2 This utility model provides the following technical solution: a catering fume purification and deodorization system with an active agent - alkyl glycoside, comprising:

[0029] Wet condenser oil fume purifier 1.

[0030] The exhaust fan 2 is connected to the wet condenser oil fume purifier 1 via a connecting duct;

[0031] The system also includes a dosing system, which consists of a dosing tank 3 containing APG solution, a dosing port on the water tank of the circulating oil-water separator 4 connected to the outlet of the dosing tank 3, and a dosing solenoid valve 5 installed on the dosing pipeline that is linked to the electromagnetic water supply valve 6 of the circulating oil-water separator 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 active decomposition gas in the foam generated after atomization decomposes the oil and hydrocarbon substances, causing these substances to be captured and decomposed, mixed with water and flowing into the oil-water separator, ultimately achieving a good treatment, deodorization and odor removal effect.

[0032] In this embodiment, the concentration of the APG solution is 50%, and the pH is 11.5-12.5.

[0033] This embodiment is an example of oil fume exhaust gas treatment. The exhaust gas is oil mist generated during the production process in the catering industry, and the exhaust gas volume is 30,000 m3 / h.

[0034] In this embodiment: After the dosing solenoid valve 5 is linked with the water tank solenoid water supply valve 6 of the circulating oil-water separator 4, the dosing solenoid valve 5 opens simultaneously to add APG solution to the water tank when the water tank solenoid water supply valve 6 of the circulating oil-water separator 4 is opened.

[0035] In this embodiment: the induced draft fan 2 introduces the oil fume exhaust gas into the wet condenser oil fume purifier 1. The oil fume exhaust gas is cooled down by condensation inside the wet condenser oil fume purifier 1, changing from a gaseous state to a liquid state.

[0036] In this embodiment, the oily exhaust gas is subjected to a combined action of centrifugal degreasing system and atomization collection system inside the wet condenser oily exhaust gas purifier 1.

[0037] In this embodiment: under the action of viscosity and tension of liquid water in the atomization capture system, pollutants are rapidly captured and discharged into the oil-water separator.

[0038] In this embodiment, the aromatic gases in the cooking fumes can be removed by using the hydrocarbons and pungent burnt odor produced by the seasonings during high-temperature cooking.

[0039] In this embodiment, APG is presented as a white solid powder or a pale yellow oily liquid, and its molecules are composed of hydrophobic groups (alkyl groups) and hydrophilic groups (polyhydroxy glycosides).

[0040] In this embodiment: the hydrophilic and hydrophobic groups in the APG molecule interact with water and oil respectively. When APG dissolves in water, its hydrophilic groups face the water surface, while its hydrophobic groups face the air.

[0041] In this embodiment: Under the combined action of 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 a gaseous state to a liquid state.

[0042] In this embodiment, the original APG solution concentration in the dosing tank is 50%, and the pH is between 11.5 and 12.5 (calculated based on pH=12). The original APG solution is added to the circulating water tank of the wet scrubbing system for restaurant fumes. The original APG solution is mixed with tap water in the tank at a certain ratio (0.1%-5.0%). The mixed liquid enters the wet scrubbing condenser for atomization, where it captures and purifies oil fumes and odors. Testing showed that the purification efficiency of various mixed liquid ratios for oil mist and odor in the exhaust gas is as follows: Figure 2 As shown (Note: The ratio of 0.1% refers to the mixing of 0.1g of original APG solution with 100g of tap water).

[0043] Based on the relevant testing data from the above engineering implementation, it is evident that when the ratio of the original APG solution to tap water in the water tank is approximately 0.5%, the pH is 9-10, significantly improving the deodorization and oil mist purification capabilities for restaurant fumes. The purified odor concentration can be reduced to 15 (dimensionless), far below the strictest local emission limit of 80 (dimensionless), and the purified oil mist concentration can be reduced to 0.12 mg / m³, also below the national emission limit of 2.0 mg / m³ and the strictest local emission limit of 1.0 mg / m³. Therefore, it can be widely promoted and used in engineering projects. Furthermore, because the foam generated by APG increases system air resistance, the concentration of APG in the mixture should not be too high while ensuring the deodorization and purification effect. Excessive APG concentration will produce more foam, leading to excessive system resistance, high energy consumption, and potentially poor system ventilation. Therefore, a mixing ratio of 0.5% of the original APG solution to tap water is generally used, and the efficiency of deodorization, odor removal and oil mist purification can reach 99%, which is far higher than the relevant emission standards.

[0044] In this embodiment: APG possesses a unique molecular structure and excellent physicochemical properties, offering several advantages in the wet purification process of restaurant kitchen fumes. Specifically:

[0045] APG has high solubility. APG typically appears as a white solid powder or a pale yellow oily liquid. Its molecules consist of hydrophobic groups (alkyl groups) and hydrophilic groups (polyhydroxy glycosides). The hydrophobic groups interact with nonpolar molecules in water, while the hydrophilic groups form hydrogen bonds with water molecules. This interaction helps APG form a stable structure in water, thus increasing its solubility. Furthermore, APG is easy to dilute, does not gel, and is convenient to use.

[0046] APG exhibits excellent foaming properties. As a nonionic surfactant, the hydrophilic and hydrophobic groups in the APG molecule interact with water and oil, respectively, and this interaction contributes to foam formation. Specifically, when APG dissolves in water, its hydrophilic groups face the water surface, while its hydrophobic groups face the air; this arrangement helps form a stable foam layer.

[0047] APG has low surface tension and high activity. The APG molecule contains both hydrophilic and hydrophobic groups. This structure gives APG excellent emulsifying and detergency capabilities. APG effectively reduces the surface tension of grease in water. After large oil mist molecules are captured by foam, they are broken down into smaller molecules under the action of APG, ultimately dissolving and dispersing in the water, thus easily removing and decomposing grease from gases and object surfaces.

[0048] APG is highly safe. It has excellent biodegradability and can be rapidly broken down by microorganisms in the environment, making it environmentally friendly. Due to the presence of natural sugar groups in its molecular structure, APG has low irritation to human skin and eyes, making it safe to use.

[0049] Working principle: This catering fume purification and deodorization system with active agent-alkyl glycosides uses an induced draft fan 2 to introduce the oil fume exhaust gas into a wet condenser oil fume purifier 1. Inside the wet condenser 1, under the combined action of a centrifugal degreasing system and an atomization collection system, the oil fume pollutants collide with atomized water molecules and the condenser, rapidly condensing and cooling down from a gaseous state to a liquid state. Due to the viscosity and surface tension of the liquid water, the pollutants are quickly collected and discharged into the oil-water separation tank. To remove aromatic gases, hydrocarbons produced by various seasonings during high-heat cooking, and the pungent burnt odor from the oil fume exhaust gas, improve the collection efficiency of oil mist molecules, and reduce the emission of oil fume molecules, non-methane total hydrocarbons, and carbonized particulate matter, a dosing system is added. The dosing tank 3 contains a 50% APG solution. The outlet pipe of the dosing tank 3 leads to the dosing port of the water tank of the circulating oil-water separator 4, which is matched with the wet condensing oil fume purifier 1. A dosing solenoid valve 5 is installed on the dosing pipeline and is linked with the water tank solenoid water supply valve 6 of the circulating oil-water separator 4. That is, when the water tank solenoid water supply valve 6 of the circulating oil-water separator 4 is opened, the dosing solenoid valve 5 is opened at the same time to add 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 high-pressure water pipe for atomization. After atomization, a large amount of fine foam is generated. The surface activity of APG quickly decomposes the oil and hydrocarbon substances in the gas, so that these harmful substances are fully captured and decomposed. The foam mixes with water and flows into the oil-water separator, ultimately achieving a good treatment, deodorization and odor removal effect.

[0050] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A system for purifying and deodorizing restaurant fumes using an active agent—alkyl glycoside, characterized in that, include: Wet condenser oil fume purifier (1) The exhaust fan (2) is connected to the wet condenser oil fume purifier (1) via a connecting duct. The system also includes a dosing system, which includes a dosing tank (3) containing APG solution, a dosing port for the water tank of the circulating oil-water separator (4) connected to the outlet of the dosing tank (3), and a dosing solenoid valve (5) installed on the dosing pipeline that is linked with the electromagnetic water supply valve (6) of the circulating oil-water separator (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 active decomposition gas in the foam APG generated after atomization decomposes the oil and hydrocarbon substances, causing these substances to be captured and decomposed, and mixed with water and flow into the oil-water separator.

2. The catering fume purification and deodorization system with alkyl glycoside as the active agent according to claim 1, characterized in that: The APG solution has a concentration of 50% and a pH of 11.5–12.

5.

3. The catering fume purification and deodorization system with alkyl glycoside as an active agent according to claim 2, characterized in that: When the dosing solenoid valve (5) is linked with the water tank solenoid water supply valve (6) of the circulating oil-water separator (4), the dosing solenoid valve (5) will open simultaneously to add APG solution to the water tank when the water tank solenoid water supply valve (6) of the circulating oil-water separator (4) is opened.

4. The catering fume purification and deodorization system with alkyl glycoside as the active agent according to claim 3, characterized in that: The induced draft fan (2) introduces the oil fume exhaust gas into the wet condenser oil fume purifier (1). The oil fume exhaust gas is cooled down by condensation inside the wet condenser oil fume purifier (1) and changes from a gaseous state to a liquid state.

5. The catering fume purification and deodorization system with alkyl glycoside as an active agent according to claim 4, characterized in that: The oily exhaust gas is subjected to a combined action of centrifugal degreasing system and atomization collection system inside the wet condenser oily exhaust purifier (1).

6. The catering fume purification and deodorization system with alkyl glycoside as an active agent according to claim 5, characterized in that: Under the action of viscosity and surface tension of the liquid water in the atomization collection system, pollutants are rapidly collected and discharged into the oil-water separator.

7. The catering fume purification and deodorization system with alkyl glycoside as an active agent according to claim 6, characterized in that: By utilizing the hydrocarbons and pungent burnt odor produced by seasonings during high-heat cooking, aromatic gases in cooking fumes can be removed.

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

9. The catering fume purification and deodorization system with alkyl glycoside as an active agent according to claim 8, characterized in that: The hydrophilic and hydrophobic groups in the APG molecule interact with water and oil, respectively. When APG dissolves in water, its hydrophilic groups face the water surface, while its hydrophobic groups face the air.

10. A catering fume purification and deodorization system with an active agent-alkyl glycoside according to claim 5, characterized in that: 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 a gaseous state to a liquid state.

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