CN105258184A - Smoke exhaust ventilator capable of purifying air - Google Patents

Abstract

The invention discloses a smoke exhaust ventilator capable of purifying air. The smoke exhaust ventilator comprises a shell and lampblack pumping holes, wherein the lampblack pumping holes are formed in the bottom surface and the side faces of the shell; the shell is provided with a centrifugal fan arranged in the shell; the centrifugal fan is arranged in a turbine shell to enable air entering the turbine shell to be centrifuged; an oil stain flow guide hole is formed in the bottom of the turbine shell; at least one venting gap is arranged on the upper side face of the smoke exhaust ventilator and is connected with a catalyst layer. According to the invention, through arranging the catalyst layer at an exhaust port, acrolein and other organic pollutants in lampblack are degraded into carbon dioxide, and various pollutants are reduced to ppm scale, so that lampblack is effectively purified.

Description

A kind of smoke exhaust ventilator with air-cleaning function

Technical field

The present invention relates to oil smoke and remove field of purification, be specifically related to a kind of smoke exhaust ventilator with air-cleaning function.

Background technology

China is cuisines big countries, and its cooking method comprises frying quick-fried boiling, in whole cooking process, can produce a lot of oil smoke.

Find after deliberation, oil smoke be edible oil and food under the high temperature conditions, a large amount of thermal oxide catabolites of generation.During the cooking, grease is heated, and when temperature reaches the smoke point 170 DEG C of edible oil, occurs the blue smoke mist that the initial stage decomposes, along with temperature continues to raise, decomposition rate is accelerated, when temperature reaches 250 DEG C, occur a large amount of oil smoke, and with pungent smell, oil smoke granularity is at 0.01 micron-0.3 micron.Relevant department analyzes from the oil smoke sample of the frequent deep fried foodstuff that residential households is collected, and measures 220 number of chemical materials altogether, wherein mainly contains aldehyde, ketone, hydrocarbon, aliphatic acid, alcohol, aromatic compound, ester, lactone, heterocyclic compound etc.Also the known mutations carcinogenic substances such as volatile nitrosamine are found in cooking fume.

Oil smoke with oxygen diffusion to whole inhabitation air, and can be down to room temperature with air themperature and then condense on the surface such as wall, cabinet, thus produces grease, causes polluting.Secondly.The harmful substance sucked in oil smoke can cause respiratory disorder or even bring out cancer.

Existing smoke exhaust ventilator, is generally adopt oil cleaner screen or centrifugation, the oil droplet volatilized in oil smoke can be blocked.Typical smoke exhaust ventilator is arranged on gas-cooker periphery, during its work, the oil smoke oil gas that produces and kitchen is scorching effectively shields in the waste gas that gas-cooker burning can be produced and cooking process, and the above three wastes are raised to smoke exhaust ventilator mouth and make it take away rapidly, outside discharge chamber, realize kitchen environment close to no pollution.Ministry of Health of China disease prevention and control center detection smoke-guiding machine can improve oil pumping press effect and reach 3-4 doubly.It is also not long that smoke-guiding machine enters the Chinese family kitchen time, and current family kitchen smoke evacuation work has mostly been come by smoke exhaust ventilator.Although smoke exhaust ventilator can exclude the most of oil smoke in kitchen, it unable thorough solve culinary art in produce oil smoke to whole kitchen pollution.The oil smoke produced in culinary art contains much harmful material and comprises the carcinogen such as aromatic amine and N-PAHS.Find from investigation, be exposed to the kitchen fume of high heat, oil gas, gas and burnt gas for a long time, the immunity function of people, cardio-pulmonary function all can reduce a lot, cause the generation of a lot of disease.

Part gasified harmful substance matter in oil smoke, the main component methacrylaldehyde of such as oil smoke, it has strong acid, has stronger stimulation to nose, eye, throat mucous membrane, can cause the breathing problems such as rhinitis, sphagitis, tracheitis, current smoke exhaust ventilator is by outside its discharge chamber.But in view of current population high density residential area, be discharged to the harmful gaseous objects such as the methacrylaldehyde of space outerpace, still can endanger the health of other residents.

Therefore, how to reduce the gasified harmful substance even eliminated in oil smoke, thus purification is drained into the oil smoke of space outerpace, is the new technical barrier of smoke exhaust ventilator field face.。

Summary of the invention

The object of the invention is to propose a kind of smoke exhaust ventilator with air-cleaning function, it selects specific catalyst, utilize the high temperature of oil smoke itself, the harmful gaseous decomposition product such as the methacrylaldehyde in oil smoke are become carbon dioxide, and then enter space outerpace, thus purifying oil fume, control oil smoke is to the gaseous contamination of external environment condition.

For reaching this object, the present invention by the following technical solutions:

A kind of smoke exhaust ventilator with air-cleaning function, there is shell and at the oil fume extracting opening being arranged at enclosure bottom and side, described shell has the centrifugal fan established within it, centrifugal fan is arranged in turbine case, and to make the air entered in turbine case produce centrifugal action, the bottom of described turbine case is provided with greasy dirt flow-guiding mouth, at the upper side of smoke exhaust ventilator, at least one exhaust space is set, described exhaust space is connected with catalyst layer, it is characterized in that, described Catalytic Layer consists of:

A) the β type ferrosilite of 5%-20%, shown in described β type ferrosilite is composed as follows:

(x+y)M _(2/n)O·xFe ₂O ₃·yAl ₂O ₃·zSiO ₂·wH ₂O

In formula, M represents cation, and n is the valence of cation M, x+y+z=1, z/x to be 100-220, w be more than 1 positive integer, its SiO ₂/ Al ₂o ₃mol ratio be 550-800;

B) GdFeO doped with Ce of 1%-10% ₃with TiO ₂mixture, Ce:GdFeO ₃: TiO ₂mol ratio be 0.25:1:2, and described titanium dioxide is anatase crystal;

C) ZSM-5 molecular sieve of surplus.

The smoke extractor of band air-cleaning function of the present invention operationally, be arranged on the drive unit in cooking-fume exhausting hood housing, it is generally motor, driving centrifugal fan rotates, the oil fume extracting opening making oil smoke pass through to be arranged on outer casing bottom and side enters turbine case, gas rotating produces centrifugal force, and the olesome in oil smoke is thrown on the inwall of turbine case under centrifugal action, and then is collected by inwall and then discharge smoke exhaust ventilator by flow-guiding mouth.Centrifugalled oil smoke is under the driving of centrifugal fan, enter exhaust space, in the catalyst layer arranged in exhaust space, organic pollution in oil smoke, such as methacrylaldehyde etc., catalyzedly in catalyst layer are degraded into the gaseous products such as carbon dioxide, and then discharge smoke exhaust ventilator, enter outside atmosphere, thus complete the purification of oil smoke in smoke exhaust ventilator.

Smoke exhaust ventilator of the present invention is by arranging Catalytic Layer at exhaust outlet, described Catalytic Layer is by choosing specific catalyst component A and B component, under the effect of ZSM-5 molecular sieve, this catalyst is made to produce cooperative effect, it even at room temperature can play catalytic action, be carbon dioxide by organic pollutant degradations such as the methacrylaldehyde in oil smoke, various pollutant be reduced to ppm level, thus effectively purified oil smoke.

Detailed description of the invention

The present invention is described air purifier of the present invention by following embodiment.

Embodiment 1

A kind of smoke exhaust ventilator with air-cleaning function, there is shell and at the oil fume extracting opening being arranged at enclosure bottom and side, described shell has the centrifugal fan established within it, centrifugal fan is arranged in turbine case, and to make the air entered in turbine case produce centrifugal action, the bottom of described turbine case is provided with greasy dirt flow-guiding mouth, at the upper side of smoke exhaust ventilator, at least one exhaust space is set, described exhaust space is connected with catalyst layer, it is characterized in that, described Catalytic Layer consists of;

A) the β type ferrosilite of 10%, shown in described β type ferrosilite is composed as follows:

(x+y)M _(2/n)O·xFe ₂O ₃·yAl ₂O ₃·zSiO ₂·wH ₂O

In formula, M represents cation, and n is the valence of cation M, and x+y+z=1, z/x are 150, w is 2, its SiO ₂/ Al ₂o ₃mol ratio be 550-800;

B) GdFeO doped with Ce of 5% ₃with TiO ₂mixture, Ce:GdFeO ₃: TiO ₂mol ratio be 0.25:1:2, and described titanium dioxide is anatase crystal;

C) ZSM-5 molecular sieve of surplus.

Be placed in above cooking stove by smoke exhaust ventilator of the present invention, open cooking stove, put into soybean oil, be opened to maximum by the fire of gas-cooker in pot, oil smoke during simulation quick-fried, is opened to peak power by smoke exhaust ventilator of the present invention simultaneously, simulates maximum operating mode load with this.Detect the flue gas purified through smoke exhaust ventilator of the present invention, after testing, its organic pollution (comprising methacrylaldehyde) is degraded to less than 0.01 milligram/cubic metre, is far smaller than the requirement of the Indoor Air Quality standards that GB/T18883-2002 specifies.

Comparative example 1

Component A content 15%, not containing B component, all the other conditions are constant, and organic pollution content is more than 0.5 milligram/cubic metre.

Comparative example 2

B component content 15%, not containing component A, all the other conditions are constant, and the content of organic pollution is more than 0.5 milligram/cubic metre.

Comparative example 3

ZSM-5 molecular sieve is replaced with alundum (Al2O3), and all the other conditions are constant, and organic pollution content is more than 0.1 milligram/cubic metre.

Above-described embodiment and comparative example illustrate, at room temperature, independent component A and B component, all do not reach the effect of component A and B component coupling, illustrate to there is specific contact between composition A of the present invention and B component, which create cooperative effect.

Applicant states, the present invention illustrates air purifier of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned air purifier, does not namely mean that the present invention must rely on above-mentioned detailed catalysts and could implement described purification of air.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.

Claims (1)

1. the smoke exhaust ventilator with air-cleaning function, there is shell and at the oil fume extracting opening being arranged at enclosure bottom and side, described shell has the centrifugal fan established within it, centrifugal fan is arranged in turbine case, centrifugal action is produced to make the air entered in turbine case, the bottom of described turbine case is provided with greasy dirt flow-guiding mouth, at the upper side of smoke exhaust ventilator, at least one exhaust space is set, described exhaust space is connected with catalyst layer, it is characterized in that, described Catalytic Layer consists of:

A) the β type ferrosilite of 5%-20%, shown in described β type ferrosilite is composed as follows:

(x+y)M _(2/n)O·xFe ₂O ₃·yAl ₂O ₃·zSiO ₂·wH ₂O

In formula, M represents cation, and n is the valence of cation M, x+y+z=1, z/x to be 100-220, w be more than 1 positive integer, its SiO ₂/ Al ₂o ₃mol ratio be 550-800;

B) GdFeO doped with Ce of 1%-10% ₃with TiO ₂mixture, Ce:GdFeO ₃: TiO ₂mol ratio be 0.25:1:2, and described titanium dioxide is anatase crystal;

C) ZSM-5 molecular sieve of surplus.