CN1519512A

CN1519512A - Exhaust hood purified though dipping path

Info

Publication number: CN1519512A
Application number: CNA031030424A
Authority: CN
Inventors: 曹宝山
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-01-23
Filing date: 2003-01-23
Publication date: 2004-08-11
Anticipated expiration: 2023-01-23
Also published as: CN1237310C

Abstract

An exhaust hood with bath cleaning function for cleaning the polluted air is composed of a main body, a polluted air sucking inlet, and a cleaned air exhausting outlet. It features its bath cleaning pool full of solvent or solution for cleaning the polluted air and its accessories including airflow splitting plate, air-liquid separator, liquid supplying cylinder and tube, surficia dirt discharging outlet, and bottom dirt discharging outlet. Its advantages are high efficiency and simple structure.

Description

Dipping bath purifying exhaust gas cover

Technical field the present invention relates to the vented exhaust cover, particularly the wet purification hood.

Vented exhaust commonly used in the present ventilating engineering of background technology is covered with three kinds of fundamental types.A kind of is plain edition, its mainly act on be control air pollutants range of scatter and to air-polluting effective capture; Another kind of is dry cleaning type (range hood of family expenses belongs to this type of more), it is except that having above-mentioned functions, also can be under dry conditions, utilize machinery, physical force (inertia, collision, interception, diffusion and electrostatic effect etc.), a part of solid, liquid phase air pollutants in the exhaust are separated in exhaust, make exhaust obtain primary purifying; The third is wet purification type (" fortune water enclosure " used as catering trade), the air cleaning unit that its utilization is set up, liquid after the atomizing is sprayed in the contaminated air of the hood of flowing through, contaminated air is washed, solid, liquid, gas phase pollutant is wherein settled down, reduce the nuisance content in the exhaust.Existing wet purification hood is compared with the hood of other type, purification efficiency is higher relatively, but because of it need set up the relatively independent and bulky atomization of liquid, spray and storage facility, so when having higher purification efficiency, also exist such as system and constitute shortcomings such as complicated, that operation maintenance is loaded down with trivial details, take up room too much and power consumption is excessive, fine drop behind the atomizing spray and air separation difficulty in addition, exhaust band liquid measure is many, therefore not only its range of application is restricted, and purification efficiency also is difficult to further improve.

Task of the present invention provides a kind of novel wet purification vented exhaust cover, utilize it not increasing the original volume of hood substantially, outside the cover do not set up under the prerequisite of a lot of attached purifiers and not obvious increase operation power consumption, improve ventilation equipment that this type of hood is housed or system to air-polluting purification efficiency, reduce atmosphere pollution, improve the air ambient quality, and can when obtaining higher purification efficiency, further reduce the cost and the operation expense of system.

Summary of the invention task of the present invention is finished by following scheme: one or more dipping bath clarifier-tanks and dipping tube are set in the hood with cover body, air suction inlet and exhaust port.Fill solvent or solution in the dipping bath clarifier-tank as purifying body lotion, decide on the kind and the concentration that are cleaned the contained pollutant of air its concrete composition, and purpose is in order to improve to the capture of pollutant with to the changing effect of its physics, chemical property.The upper end of dipping tube is connected with the inboard of cover body wallboard, part or all of lower end is to be immersed in soaking around the limit in the dipping bath clarifier-tank body lotion, under static (non-operating state) condition, its immersion depth is 1～15mm, optimum range 3～8mm, only some is when soaking around the limit when the lower end of dipping tube, and remainder then links to each other with dipping bath clarifier-tank sidewall.The inner space to exhaust port is divided into air-breathing district and exhaust area two parts from air suction inlet with hood jointly for the connecting plate of dipping tube and cover body, dipping tube body and body lotion liquid level.Contaminated air is under the forcing of action of air pressure and dipping tube, enter air-breathing district successively, pour in the body lotion in this district's dipping bath clarifier-tank, walk around soaking of dipping tube around the limit, then be upward through the exhaust area body lotion, enter exhaust area, after outside the exhaust port discharge cover, during empty state (not having body lotion in the dipping bath clarifier-tank), the mean flow rate of each air flow section is less than 30m/s in the cover.Pour the fierce disturbance and the interaction of the contaminated air and the body lotion of body lotion, make contaminated become many bubbles that are immersed in the body lotion, and form froth bed in the exhaust area bath surface.In the overall process of passing through body lotion and froth bed, most solid, liquid and gas phase nuisance in the contaminated air are captured by body lotion, and toxic reduces, and contaminated air is purified.

In order further to dwindle the volume of air bubble in the body lotion, increase number of bubbles and with the contact area of body lotion, enlarge the scope of froth bed and improve its stability, improve the dipping bath clean-up effect, air-flow differentiation plate is set in the body lotion of clarifier-tank, its concrete structure can be common perforated plate, also can be filter screen or plate shape packed bed, preferred common perforated plate.One end of air-flow differentiation plate is close to dipping tube, its integral body can become any angle with the tube wall of dipping tube, but preferred plan is that its big portion is immersed in the exhaust area body lotion, and whole air-flow differentiation plate dynamically can covered by body lotion or froth bed under (running status) condition, air stream is evenly distributed in the exhaust area bath surface.

In the cover body exhaust area gas-liquid separator is set, in order to reduce the band liquid measure of exhaust.The concrete structure of gas-liquid separator can be the inertia liquid barrier, also can be centrifugal defluid device.After compiling, isolated body lotion drop is back in the dipping bath clarifier-tank.

The fluid infusion jar is installed outside hood, liquid supplementation pipe and fluid infusion mouth are set in the cover, the three connects successively, forms the fluid infusion system of dipping bath purifying exhaust gas cover jointly.The fluid infusion mouth can be located in the exhaust area of hood, also can be located in the air-breathing district, preferably is located in the exhaust area.The duty of fluid infusion mouth is subjected to the body lotion liquid surface height controlling, concrete control method can adopt atmospheric pressure control, microswitch control, ball-cock assembly control and electronics level control etc., best is that atmospheric pressure is controlled, promptly be that the fluid infusion jar that is filled with solvent or solution is inverted, and its end openings is immersed in the body lotion, the control that is realized when the position is in the level control height.When the fluid infusion mouth was located in the exhaust area, what its level control height should be than dipping tube lower end soaked high 1～15mm around the limit, optimum range 3～8mm.When the fluid infusion mouth was located in the air-breathing district, its level control height should be than soaking low 1～10mm around the limit, optimum range 3～5mm, in such cases, filling first of body lotion needs manually to implement, and to guarantee hood before operation for the first time, the immersion depth that dipping tube soaks around the limit meets aforementioned requirement.

Surface blow-off mouth and bottom blow-down mouth are set in the hood.The surface blow-off mouth is installed in the dipping bath clarifier-tank of hood exhaust area, and its plane of the opening exceeds body lotion liquid level 10～30mm under static (non-operating state) condition.The surface blow-off mouth is connected with blowdown main by fluid-tight.The bottom blow-down mouth is installed in the minimum point of dipping bath clarifier-tank storage liquid space, is connected with blowdown main by bottom blow-down valve.

For updraft type hood and the hood that is provided with a plurality of dipping bath clarifier-tanks, for the installation that makes hood drainage and fluid infusion system with use more easy and reliable, can hopper be installed at the hood bottom margin, necessary blowdown communicating pipe and equal liquid communicating pipe should be set between hopper and dipping bath clarifier-tank this moment, guaranteeing hopper and dipping bath clarifier-tank, and the fluid connection of each sewage draining exit, fluid infusion mouth.

When the temperature of exhaust, when humidity is higher,, can carry out preheating, the insulation of appropriateness or adopt high thermal resistance material to make the parts of storing body lotion it for preventing the starting stage dipping bath clarifier-tank and the hopper outer surface dewfall of hood in operation.

Dipping bath purifying exhaust gas cover should be made combination assembled, and at some position of cover body demountable cover plate is set, so that in case of necessity hood is cleaned completely and safeguard.

In order further to improve the condition of work and the air quality near the technological operation district hood, can on hood, set up blast fence, air curtain barrier, new wind feeder and lighting etc.

The invention has the advantages that: utilize the purification body lotion that fills in dipping bath clarifier-tank, dipping tube and the pond that is provided with on the hood, the contaminated air that liquidates in the body lotion and be divided into the small scale bubble is implemented effective dipping bath and is purified, in addition owing in purification process, need not body lotion is carried out high-intensity atomizing processing, so it is wide that this kind hood not only captures the scope of pollutant, pollutant harmless treatment efficient height, and exhaust band liquid measure is few, and actual pollutant discharge amount is low.The air-flow of setting up on the cover breaks up plate, gas-liquid separator and fluid infusion and blowdown apparatus, can further improve the purification efficiency of dipping bath purifying exhaust gas cover, increases reliability of operation and stability.Owing to need not outside hood, to set up too much bulky air cleaning unit, so the ventilating system of this type of hood is housed also to be had system simultaneously and constitutes characteristics such as simple, that operation maintenance is convenient and manufacturing and cost of use be all relatively low, thereby be specially adapted to the control of small-sized dispersion air pollution sources, as air exhausting device with equipment such as the polishing of its assembling in Surface Machining, polishing, sprayings, and the range hood among the merchant, civilian kitchen etc.Further reduced volume and optimize structure after, dipping bath purifying exhaust gas cover also can be used for solving the air pollution control problem of moving source.

Description of drawings is specified embodiment below in conjunction with accompanying drawing:

Fig. 1 is a kind of front view of side-suction type dipping bath purifying exhaust gas cover.

Fig. 2 is the A-A profile of side-suction type hood.

Fig. 3 is the B-B profile of side-suction type hood.

Fig. 4 is the C-C profile of side-suction type hood.

Fig. 5 is a kind of front view of updraft type dipping bath purifying exhaust gas cover.

Fig. 6 is the D-D profile of updraft type hood.

Fig. 7 is the E-E profile of updraft type hood.

Fig. 8 is the F-F profile of updraft type hood.

Unit number and title thereof among the figure are followed successively by: 1-cover body, 2-air suction inlet, 3-exhaust port, 4-dipping bath clarifier-tank, 5-dipping tube, 6-air-flow differentiation plate, 7-gas-liquid separator, 8-fluid infusion jar, 9-liquid supplementation pipe, 10-fluid infusion mouth, 11-surface blow-off mouth, 12-bottom blow-down mouth, 13-fluid-tight, 14-blowdown main, 15-bottom blow-down valve, 16-hopper, 17-blowdown communicating pipe, equal liquid communicating pipe of 18-, 19-fresh wind tube interface, the new wind of 20-are sent mouth.

The basic functional principle of specific embodiment the above embodiment of the present invention is: under action of air pressure, contaminated air enters in the cover from the hood suction inlet, body lotion liquid level in the air-breathing district of the hood dipping bath clarifier-tank (4) is descended, and the liquid level of exhaust area rises.The contaminated air in air-breathing district pours in this district's body lotion, walks around soaking around the limit of dipping tube (5) lower end, then is upward through air-flow differentiation plate (6) and exhaust area body lotion.The auxiliary differentiation of the fierce disturbance of contaminated air and body lotion and air-flow differentiation plate (6) makes contaminated become many small scale bubbles that are immersed in the body lotion, and forms froth bed in the exhaust area bath surface.Minute bubbles structure after the differentiation, make and have sizable contact area between contaminated air and the body lotion, the body lotion of turbulence and froth bed have improved heat, the matter exchange intensity between contaminated air and the body lotion, suitably the body lotion of preparation makes solid, liquid and gaseous contaminant in the contaminated air be removed effectively and transform by absorption, absorption and certain physical, chemical reaction.In the overall process of passing through body lotion and froth bed, contaminated air is efficiently purified, after outside exhaust port (3) the discharge cover.Air institute droplets entrained was separated with exhaust after the gas-liquid separator (7) that is provided with in the hood can make and purify, and reduced the band liquid measure of exhaust.Liquid level in fluid infusion mouth (10) the common guarantee dipping bath pond of liquid supplementation pipe (9) that is provided with in the outer fluid infusion jar of installing (8) of hood, the hood and atmospheric pressure control formula is in suitable design height all the time.The surface blow-off mouth (11) that is installed in exhaust area swims in the low-gravity pollutant of bath surface in order to eliminating, and surface blow-off mouth (11) is connected with blowdown main (14) by fluid-tight (13).Bottom blow-down mouth (12) can get rid of effectively dipping bath clarifier-tank (4) and hopper (16) bottom greatly than heavy contaminant.Bottom blow-down mouth (12) is connected with blowdown main (14) by bottom blow-down valve (15).

Claims

1, dipping bath purifying exhaust gas cover, has cover body (1), air suction inlet (2) and exhaust port parts such as (3), it is characterized in that in cover, one or more dipping bath clarifier-tanks (4) and dipping tube (5) being set, fill solvent or solution in the dipping bath clarifier-tank (4) as purifying body lotion, the upper end of dipping tube (5) is connected with the inboard of cover body (1) wallboard, part or all of lower end is for being immersed in soaking around the limit in dipping bath clarifier-tank (4) body lotion, under static (non-operating state) condition, its immersion depth is 1～15mm, the connecting plate of dipping tube (5) and cover body (1), the inner space to exhaust port (3) is divided into air-breathing district and exhaust area two parts from air suction inlet (2) with hood jointly for dipping tube (5) body and body lotion liquid level, contaminated air is under the forcing of action of air pressure and dipping tube, enter air-breathing district successively, pour in the body lotion in this district's dipping bath clarifier-tank (4), walk around dipping tube (5) and be immersed in soaking in the body lotion around the limit, then be upward through the exhaust area body lotion, enter exhaust area, after exhaust port (3) discharge outside the cover, during empty state (not having body lotion in the dipping bath clarifier-tank), the mean flow rate of each air flow section is less than 30m/s in the cover.

2, hood according to claim 1, it is characterized in that in the body lotion of dipping bath clarifier-tank, being provided with air-flow differentiation plate (6), its concrete structure can be common perforated plate, also can be filter screen or plate shape packed bed, preferred common perforated plate, one end of air-flow differentiation plate is close to dipping tube (5), its integral body can become any angle with the tube wall of dipping tube (5), but preferred plan is that its big portion is immersed in the exhaust area body lotion, and whole air-flow differentiation plate dynamically can covered by body lotion or froth bed under (running status) condition, air stream is evenly distributed in the exhaust area bath surface.

3, according to claim 1 or the described hood of claim 2, it is characterized in that in the cover body exhaust area, being provided with gas-liquid separator (7), its concrete structure can be the inertia liquid barrier, also can be centrifugal defluid device.

4, according to claim 1 or the described hood of claim 2, it is characterized in that outside hood, installing fluid infusion jar (8), liquid supplementation pipe (9) and fluid infusion mouth (10) are set in the cover, the three connects successively, fluid infusion mouth (10) can be located in the exhaust area of hood, also can be located in the air-breathing district, preferably be located in the exhaust area, its duty is subjected to the body lotion liquid surface height controlling, concrete control method can adopt atmospheric pressure control, microswitch control, ball-cock assembly control and electronics level control etc., best be atmospheric pressure control, fluid infusion mouth (10) is located at exhaust area when interior, its level control aspect ratio dipping tube (5) lower end soak high 1～15mm around the limit, optimum range 3～8mm, when being located in the air-breathing district, its level control aspect ratio dipping tube (5) lower end soak around the limit low 1～10mm, optimum range 3～5mm.

5, hood according to claim 3, it is characterized in that outside hood, installing fluid infusion jar (8), liquid supplementation pipe (9) and fluid infusion mouth (10) are set in the cover, the three connects successively, fluid infusion mouth (10) can be located in the exhaust area of hood, also can be located in the air-breathing district, preferably be located in the exhaust area, its duty is subjected to the body lotion liquid surface height controlling, concrete control method can adopt atmospheric pressure control, microswitch control, ball-cock assembly control and electronics level control etc., best be atmospheric pressure control, fluid infusion mouth (10) is located at exhaust area when interior, its level control aspect ratio dipping tube (5) lower end soak high 1～15mm around the limit, optimum range 3～8mm, when being located in the air-breathing district, the air of its level control aspect ratio dipping tube (5) lower end soaks low 1～10mm around the limit, optimum range 3～5mm.

6, according to claim 1 or the described hood of claim 2, it is characterized in that in the dipping bath clarifier-tank (4) of hood exhaust area, surface blow-off mouth (11) being set, its plane of the opening exceeds body lotion liquid level 10～30mm under static (non-operating state) condition, be connected with blowdown main (14) by fluid-tight (13), bottom blow-down mouth (12) is set in the dipping bath clarifier-tank, be positioned at the minimum point of dipping bath clarifier-tank storage liquid space, be connected with blowdown main (14) by bottom blow-down valve (15).

7, hood according to claim 3, it is characterized in that in the dipping bath clarifier-tank (4) of hood exhaust area, surface blow-off mouth (11) being set, its plane of the opening exceeds body lotion liquid level 10～30mm under static (non-operating state) condition, be connected with blowdown main (14) by fluid-tight (13), bottom blow-down mouth (12) is set in the dipping bath clarifier-tank, be positioned at the minimum point of dipping bath clarifier-tank storage liquid space, be connected with blowdown main (14) by bottom blow-down valve (15).

8, hood according to claim 4, it is characterized in that in the dipping bath clarifier-tank (4) of hood exhaust area, surface blow-off mouth (11) being set, its plane of the opening exceeds body lotion liquid level 10～30mm under static (non-operating state) condition, be connected with blowdown main (14) by fluid-tight (13), bottom blow-down mouth (12) is set in the dipping bath clarifier-tank, be positioned at the minimum point of dipping bath clarifier-tank storage liquid space, be connected with blowdown main (14) by bottom blow-down valve (15).

9, hood according to claim 5, it is characterized in that in the dipping bath clarifier-tank (4) of hood exhaust area, surface blow-off mouth (11) being set, its plane of the opening exceeds body lotion liquid level 10～30mm under static (non-operating state) condition, be connected with blowdown main (14) by fluid-tight (13), bottom blow-down mouth (12) is set in the dipping bath clarifier-tank, be positioned at the minimum point of dipping bath clarifier-tank storage liquid space, be connected with blowdown main (14) by bottom blow-down valve (15).