CN204329110U - A kind of internal-circulation type kitchen oil fume purifying system - Google Patents

Abstract

The utility model relates to an internal circulation type kitchen oil fume purification system, which comprises a primary oil fume eluting and purifying device, an oil fume back-burning system, and a low-temperature plasma oil fume purifier. The primary oil fume eluting and purifying device includes a gas collecting hood above a stove and a first axial flow fan with a liquid spray head placed in the first air passage; the inlet of the first axial flow fan is connected with the gas collection fume hood through the first air passage, and the first axial flow fan The outlet of the three-way valve is connected to the three-way valve; the other two ports of the three-way valve are respectively connected to the inlet of the gas circuit of the oil fume recovery system and the inlet of the low-temperature plasma oil fume purifier. The utility model can improve the efficiency of oil removal and purification.

Description

An internal circulation kitchen oil fume purification system

technical field

The utility model relates to the technical field of oil fume purification, in particular to an internal circulation type kitchen oil fume purification system.

Background technique

At present, the exhaust gas discharged from the kitchen of the catering industry and public canteens is becoming more and more serious in urban air pollution. With the progress of society, the requirements for environmental quality are getting higher and higher, and the control of domestic oil fume emission is also on the agenda. In 2000, the state issued the national environmental protection standard - GWBP5-2000 cooking fume emission standard, which stipulates that the maximum allowable emission concentration of cooking fume is ≤2.0mg/m ³ , and the minimum removal efficiency of cooking fume by purification facilities is not less than 60- 85% range.

In urban population gathering areas, comprehensive-purpose buildings are showing a gradual upward trend, and the restrictions on smoke control in kitchen kitchens in the catering industry are becoming more and more stringent. Traditional high-altitude openings and long flue ducts are prone to fire hazards. If it is an external wall pipe , It also has a negative impact on the urban landscape, and there is an urgent need for an internal circulation fume purification system.

At present, the range hoods available on the market mainly include wet type, high-voltage electrostatic type, ultraviolet light type, dynamic centrifugal type, etc. The wet type purification efficiency is low, the nozzle is easy to block, the service life is short, water consumption and power consumption are high, and it is easy to produce Secondary pollution. The high-voltage electrostatic electrode plate is easily accumulated and corroded by oil fume particles, and requires frequent replacement by professionals, resulting in high maintenance costs; as the tar on the grid surface increases, an insulator will be formed, and the purification effect will gradually decrease until it becomes invalid and the service life is short. It takes 2-3 seconds for the reaction time of the ultraviolet lampblack purifier to decompose the lampblack, and the wind speed of the pipeline is usually above 10m/s; easy to cause harm. The dynamic centrifugal grille is easy to block and needs to be cleaned every week. It cannot meet the requirements of GB18483-2001 when used alone. It is suitable for occasions with low requirements for pretreatment or purification efficiency. Finally, the most important thing is that none of the above traditional lampblack purifiers can be installed inside, and need to be installed on the outer wall to discharge at high altitude. Chinese patent ZL202008168U discloses "Smokeless Hood Indoor Inline Fume Purifier", which discloses a fume purifier inside a desktop cabinet. The fume is sucked into the high-energy fume purifier in the cabinet through the smoke pipes on three sides of the table , passing through the high-voltage electrostatic oil fume purification room, atomized water oil fume purification room, green plant oil fume purification room, and physical deodorization purification room in turn. The purifier is still mainly adsorption-type oil fume removal, and there is oil fume that is easily saturated. The purification efficiency increases with the amount of smoke. And time prolongs the defect that the purification efficiency decreases.

Utility model content

The technical problem to be solved by the utility model is to provide an internal circulation type kitchen oil fume purification system, which can improve the efficiency of oil removal and purification.

The technical solution adopted by the utility model to solve the technical problem is: to provide an internal circulation type kitchen oil fume purification system, including a primary oil fume eluting and purifying device, an oil fume back-burning system, and a low-temperature plasma oil fume purifier, and the primary oil fume eluting The purification device includes a gas collection fume hood above the stove and a first axial flow fan with a liquid spray head placed in the first air duct; the inlet of the first axial flow fan passes through the first air duct and the air collection The outlet of the first axial flow fan is connected to the three-way valve; the other two interfaces of the three-way valve are respectively connected to the inlet of the gas circuit of the oil fume recovery system and the low-temperature plasma oil fume purifier The entrance is connected.

The oil fume recovery system includes a gas circuit placed in the combustion chamber below the stove, and a blower located below the gas circuit.

The outlet of the low-temperature plasma oil fume purifier is arranged indoors.

The internal circulation kitchen oil fume purification system also includes an indoor secondary flue gas purification device, the indoor secondary flue gas purification device includes a large smoke hood, a second shaft with a liquid spray head placed in the second air duct A flow fan and an air outlet; the inlet of the second axial flow fan is connected with the large smoke hood, and the outlet of the second axial flow fan is connected with the air outlet.

The air outlet is hinged with shutters.

Both the first axial flow fan and the second axial flow fan are provided with oil-water outlet holes connected to the oil collection tank.

Beneficial effect

Due to the adoption of the above-mentioned technical scheme, the utility model has the following advantages and positive effects compared with the prior art: the liquid spray head on the first axial flow fan of the utility model sprays the water mist containing the degreasing agent , to cool down and wash the oil fume gas, so that the oil droplets are dispersed and solubilized in water, which improves the efficiency of oil removal and purification; the oil fume back-burning system and the low-temperature plasma purifier are arranged in parallel, which is beneficial to deal with a large amount of oil fume; through the indoor secondary flue gas The purification device cools down the flue gas tail gas after combustion and finally discharges it outside, and the exhaust gas meets the emission standard.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

Below in conjunction with specific embodiment, further set forth the utility model. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

The embodiment of the present invention relates to an internal circulation type kitchen fume purification device, as shown in Figure 1, including a primary fume eluting and purifying device, a fume back-burning system, a low-temperature plasma fume purifier and an indoor secondary fume purification device. The primary oil fume eluting and purifying device includes a gas collecting hood 1 at a distance of 600-1000mm above the stove, a first axial flow fan 3 with a liquid spray head placed in the first air duct 2, and the entrance of the first axial flow fan 3 It is the gas-collecting hood 1 on the top of the cooking range 8, and the outlet of the first axial flow fan 3 is connected with the three-way valve 4; except that the three-way valve 4 communicates with the outlet of the first axial flow fan 3, the other two outlets are connected with the outlet of the first axial flow fan 3 respectively. The inlet of the gas circuit 5 communicates with the inlet of the low-temperature plasma fume purifier 9 . The oil fume recovery system includes a gas circuit 5 placed in the combustion chamber 6 below the stove 8, and a blower 7 located below the gas circuit. The inlet of the gas circuit 5 is connected to an outlet of the three-way valve 4. After a part of the tail gas is mixed with the gas, it is sent to the combustion chamber 6 for combustion under the action of the blower 7, and the fully combusted products CO ₂ and H ₂ O gas are discharged into the chamber; The other outlet is connected, and the outlet is set indoors; the indoor secondary flue gas purification device includes a large smoke hood 11 arranged on the top of the kitchen, and a second axial flow fan with a liquid spray head placed in the second air duct 13 12 and the air outlet 14 hinged with shutters 15, the entrance of the second axial flow fan 12 is connected to the large smoke hood 11 arranged on the top of the kitchen, and the outlet of the second axial flow fan 12 is hinged on the upper part of the kitchen stove. The air outlet 14 that shutter 15 is arranged.

Briefly introduce the working process of the present utility model below.

When the range hood is working, the exhaust gas containing oil mist is inhaled by the axial flow fan 2, and the liquid spray head on the axial flow fan 2 sprays water mist containing degreasing additives to the axis of the axial flow fan 2, and the water mist has a negative effect on the inhalation. Washing and cooling the oil fume gas, so that the high boiling point part of the oil fume gas becomes liquid droplets, and the oil droplets are dispersed and solubilized in water under the action of degreasing additives, and the oil-water mixed liquid is exported along the oil and water under the action of centrifugal force The hole 10 is led out of the flue, and the waste gas containing residual oily smoke after being partially cooled passes through the three-way valve 4, a part of which is mixed with the stove gas at the inlet of the gas circuit 5, and is sent to the stove combustion chamber 6 for combustion under the action of the blower 7, and the oily smoke tail gas and The gas is fully burned to produce CO ₂ and H ₂ O gas, which is directly discharged into the room. The residual oil fumes that have been eluted and purified once through the other outlet of the three-way valve 4 enter the low-temperature plasma oil fume purifier 9 for further treatment and then are directly discharged into the room. The flue gas concentrated in the room mainly includes: combustion exhaust gas in the stove 8, low-temperature plasma The exhaust gas discharged after oil fume purification, and a very small amount of escaping oil fume are inhaled again by the axial flow fan 12, and the nozzle attached to the axial flow fan 12 sprays water mist to the axis of the axial flow fan 12 to continue cooling the indoor smoke Absorbed, and finally discharged from the air outlet hinged with shutters, the discharged gas fully meets the oil fume emission standard stipulated in the GWBP5-2000 emission standard.

It is not difficult to find that the utility model has a simple structure, not only has high oil removal and purification efficiency, but also has no external wall pipes, and can completely purify oil fumes only indoors, completely eliminates fire hazards, and effectively protects fire safety and urban landscapes .

Claims (6)

1. An internal circulation kitchen oil fume purification system, comprising a primary oil fume eluting and purifying device, an oil fume back-burning system, and a low-temperature plasma oil fume purifier, characterized in that the primary oil fume eluting and purifying device includes a gas collecting device above the stove The smoke hood (1) and the first axial flow fan (3) with a liquid spray head placed in the first air duct (2); the entrance of the first axial flow fan (3) passes through the first wind Road (2) is connected with the gas-collecting fume hood (1), and the outlet of the first axial flow fan (3) is connected with the three-way valve (4); the other two interfaces of the three-way valve (4) are respectively connected with The inlet of the gas circuit (5) of the oil fume back-burning system communicates with the inlet of the low-temperature plasma oil fume purifier (9). 2. The internal circulation kitchen oil fume purification system according to claim 1, characterized in that the oil fume back-burning system includes a gas circuit (5) placed in the combustion chamber (6) below the stove (8), and a The air blower (7) below the gas circuit (5). 3. The internal circulation kitchen oil fume purification system according to claim 1, characterized in that the outlet of the low-temperature plasma oil fume purifier (9) is set indoors. 4. The internal circulation kitchen oil fume purification system according to claim 1, characterized in that it also includes an indoor secondary flue gas purification device, the indoor secondary flue gas purification device includes a large fume hood (11), placed The second axial fan (12) and the air outlet (14) that have liquid injection head in the second air channel (13); ), and the outlet of the second axial flow fan (12) is connected with the air outlet (14). 5. The internal circulation type kitchen oil fume purification system according to claim 4, characterized in that the air outlet (14) is hinged with shutters (15). 6. The internal circulation kitchen oil fume purification system according to claim 4, characterized in that, both the first axial flow fan (3) and the second axial flow fan (12) are equipped with an oil-water outlet connected to the oil collection tank hole (10).