CN201618488U

CN201618488U - Three-circulation DMF waste gas recovering device

Info

Publication number: CN201618488U
Application number: CN2010201460118U
Authority: CN
Inventors: 林泽兵
Original assignee: Suzhou Jvlian Technology Co Ltd
Current assignee: Suzhou Jvlian Technology Co Ltd
Priority date: 2010-03-31
Filing date: 2010-03-31
Publication date: 2010-11-03
Anticipated expiration: 2020-03-31

Abstract

The utility model relates to a three-circulation DMF waste gas recovering device which comprises a casing. The interior of the casing is separated into a first-stage treating chamber, a second-state treating chamber and a third-stage treating chamber from bottom to top. The first-stage treating chamber and the second-state treating chamber are separated by a first liquid collecting device. The second-state treating chamber and the third-stage treating chamber are separated by a second liquid collecting device. By arranging the third-stage treating chamber, the water is supplemented by concentration gradient, the DMF gas is in sufficient contact with water, and then the pollutant is transferred to the liquid phase from the gas phase. The removing rate can reach to 98%.

Description

Three circulation DMF waste gas recovering devices

Technical field

The utility model relates to a kind of three circulation DMF waste gas recovering devices, belongs to environmental technology field.

Background technology

During products such as manufacturing PU (polyurethane) synthetic leather, acrylic fibers, transfer-film leather, need to use a large amount of volatile organic solvent N, and dinethylformamide (N, N-Dimethylform amide, DMF).DMF is water white liquid at normal temperatures and pressures, slightly ammonia is distinguished the flavor of.The DMF hygroscopicity is very strong, can be with water, alcohol, ether, ester, ketone, have saturated hydrocarbons, aromatic hydrocarbon etc. miscible, but not miscible with saturated hydrocarbons such as gasoline, ethane, cyclohexanes.

When carrying out surface treatment, dip-coating have product needed such as PU (polyurethane) synthetic leather, acrylic fibers, transfer-film leather of DMF in airtight baking oven when 60～170 ℃ high-temperature process, at this moment can produce the technology waste gas that contains DMF in a large number.If waste gas is not treated, be directly released in the atmosphere, can cause severe contamination to environment, also cause huge waste for enterprise.

Summary of the invention

The utility model provides a kind of three circulation DMF waste gas recovering devices

For achieving the above object, the technical solution adopted in the utility model is: a kind of three circulation DMF waste gas recovering devices,

Described device comprises a housing, and described enclosure interior is divided into first order process chamber, second level process chamber, third level process chamber from bottom to top; Separate with first liquid trap between first order process chamber and the second level process chamber, separate with second liquid trap between second level process chamber and the third level process chamber;

Described first liquid trap is identical with the second liquid trap structure, form by a collecting ring and several collecting tanks, described collecting ring is the catchment recess around the closed ring of arranging in one week of inner walls, several collecting tanks with the same plane of collecting ring or above it in plane at a distance of arranged, and each collecting tank end is communicated with collecting ring; One sidewall of described collecting tank is provided with water fender, and this water fender along the top that extends to adjacent with it collecting tank obliquely, between each collecting tank forms the ventilation slit of inclination with this by side edge;

First demister is established at described first order process chamber top, establishes first spray equipment below this first demister; First order chamber bottom is established first cistern, offers air inlet on the first cistern upper shell wall, and the inherent air inlet of housing top evenly offers air vent every establishing equal wind orifice plate on this equal wind orifice plate; Described first cistern by the road, water pump is communicated with first spray equipment and constitutes the water circulation;

Second spray equipment is established at process chamber top, the described second level, and the bottom is filled with wire packing, and the collecting ring of described first liquid trap connects one second cistern by the road, and this second cistern by the road, water pump is communicated with second spray equipment and constitutes the water circulation;

The housing at described third level process chamber top shrinks and is provided with exhaust outlet, and under exhaust outlet every being provided with second demister, and below second demister, establish the 3rd spray equipment, third level bottom of treatment chamber is filled with wire packing; The collecting ring of described second liquid trap connects one the 3rd cistern by the road, and the 3rd cistern by the road, water pump is communicated with the 3rd spray equipment and constitutes the water circulation;

Be communicated with by the road between described first cistern and second cistern, this pipeline is provided with on-off valve; Also be communicated with by the road between described second cistern and the 3rd cistern, also be provided with on-off valve on this pipeline.

Related content in the technique scheme is explained as follows:

1, in the such scheme, the diameter of described air vent is 7～13 centimetres.

2, in the such scheme, the end of described water fender above the Neighbor Set liquid bath is to having bending section.

3, in the such scheme, described first order process chamber promptly sprays process chamber (first circular treatment), and second level process chamber is packed tower process chamber (second circulation), and third level process chamber also is packed tower process chamber (the 3rd circulation).

4, in the such scheme, described spray equipment has five nozzles of evenly arranging, this nozzle can spray water with vaporific form.

5, in the such scheme, be filled with filler in the described demister.

Because the technique scheme utilization, the utility model compared with prior art has following advantage:

1, equal wind orifice plate of the present utility model carries out equal wind to the DMF waste gas that enters in the housing, and when all the DMF waste gas behind the wind contacted with the water of spray, effect of mass transmitting between the two was quicker.

2, because the air vent diameter of equal wind orifice plate of the present utility model is designed to 7～13 millimeters, thus can be on equal wind orifice plates, the elementary gas-liquid that flows down after making DMF waste gas and spray contacting comes in contact, and raising water is to the absorptivity of DMF waste gas.

3, the design of liquid trap of the present utility model in the liquid that discharge the collection and treatment chamber effectively, allow that also gas passes through smoothly, and windage is little.

4, the utility model is by the setting of tertiary treatment chamber, allows contain DMF gas and fully contact with water and reach and make pollutant transfer to liquid phase from gas phase, and clearance can be up to 98%.

Description of drawings

Accompanying drawing 1 is the utility model schematic diagram;

Accompanying drawing 2 is the utility model pipeline connection diagram;

Accompanying drawing 3 is for dividing equally the schematic diagram of orifice plate;

Accompanying drawing 4 is the liquid trap cutaway view.

In the above accompanying drawing: 1, housing; 2, first order process chamber; 3, second level process chamber; 4, third level process chamber; 5, first liquid trap; 6, second liquid trap; 7, collecting ring; 8, collecting tank; 9, water fender; 10, first demister; 11, first spray equipment; 12, first cistern; 13, air inlet; 14, equal wind orifice plate; 15, air vent; 16, second spray equipment; 17, second cistern; 18, exhaust outlet; 19, second demister; 20, the 3rd spray equipment; 21, the 3rd cistern.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3 and accompanying drawing 4, and a kind of three circulation DMF waste gas recovering devices,

Described device (recovery tower) comprises a housing 1, and described housing 1 inside is divided into first order process chamber 2 (first circulation), second level process chamber 3 (second circulation) and third level process chamber 4 (the 3rd circulation) from bottom to top; Separate with first liquid trap 5 between first order process chamber 2 and the second level process chamber 3, separate with second liquid trap 6 between second level process chamber 3 and the third level process chamber 4.Being provided with of two liquid traps can make gas in whole housing 1 on flow, but guarantee that the liquid that three process chambers produce does not mix mutually, and flow into three cisterns respectively, forms three and independently circulates.

Described first liquid trap 5 is identical with second liquid trap, 6 structures, form by a collecting ring 7 and several collecting tanks 8, described collecting ring 7 is the catchment recess around the closed ring of arranging housing one week of 1 inwall, several collecting tanks 8 with collecting ring 7 above in the plane at a distance of arranged, and each collecting tank 8 end is communicated with collecting ring 7; One sidewall of described collecting tank 8 is provided with water fender 9, and along the top that extends to adjacent with it collecting tank 8 obliquely, the end is extended with bending section downwards to this water fender 9 by side edge, forms the ventilation slit of inclination with this 8 of each collecting tanks.Being provided with like this can make the liquid that flows down from the top converge in the collecting ring 7, and the waste gas that upwards flows from the below can be by the ventilation slit.

First demister 10 is established at described first order process chamber 2 tops, establishes first spray equipment 11 below this first demister 10; First cistern 12 is established in first order process chamber 2 bottoms, on first cistern, 12 upper shell, 1 wall, offer air inlet 13, and housing 1 inherent air inlet 13 tops evenly offer air vent 15 every establishing equal wind orifice plate 14 on this equal wind orifice plate 14, and the diameter of air vent is 10 centimetres.Described first cistern 12 by the road, water pump is communicated with first spray equipment 11 and constitutes the water circulation.Filler because the mist that produces after the water of spray contacts with DMF waste gas can rise in the obstruction higher level process chamber is so establish first demister 10 with demist at first order process chamber 2 tops.In first order process chamber 2, the water of spray is with after DMF waste gas contacts, the drop that produces can flow downward under the effect of gravity, because all the aperture of wind orifice plate 14 is less, therefore partially liq is at equal wind orifice plate 14 surface aggregations, thereby DMF waste gas and liquid by air vent 15 carry out preliminary mass transfer, improve the rate of recovery of this device.And all wind orifice plate 14 also plays equal wind action, the water of feasible spray and the effect of mass transmitting better effects if of DMF waste gas.The liquid that flows down from air vent 15 flows directly to first cistern 12, under the conveying of pump, delivers to first spray equipment 11 again.An air inlet 13 and a blower fan be to connecting, and DMF waste gas is through after the filtration treatment, with removals such as the fiber carried secretly in the waste gas, dusts, under the effect of blower fan, enters in the housing 1 then.

Second spray equipment 16 is established at process chamber 3 tops, the described second level, the bottom is filled with wire packing, the collecting ring 7 of described first liquid trap 5 connects one second cistern 17 by the road, this second cistern 17 by the road, water pump is communicated with second spray equipment 16 and constitutes the water circulation, and it is adjacent with first cistern 12 that this second cistern 17 is located at the bottom of housing 1.Second cistern 17 also can be located at outside the housing 1.

The housing 1 at described third level process chamber 4 tops shrinks and is provided with exhaust outlet 18, and exhaust outlet 18 times every being provided with second demister 19, and below second demister 19, establish the 3rd spray equipment 20, the bottom of third level process chamber 4 is filled with wire packing; The collecting ring 7 of described second liquid trap 6 connect by the road one the 3rd cistern, 21, the three cisterns 21 by the road, water pump is communicated with the 3rd spray equipment 20 and constitutes the water circulation, it is adjacent with first cistern 17 that this second cistern 21 is located at the bottom of housing 1.Second cistern 21 also can be located at outside the housing 1.

Be communicated with by the road between described first cistern 12 and second cistern 17, this pipeline is provided with on-off valve; Also be communicated with by the road between described second cistern 17 and the 3rd cistern 21, also be provided with on-off valve on this pipeline.Because when DMF waste gas flows under the effect of blower fan from bottom to top, in process chambers at different levels, N, the content of dinethylformamide in gas can be more and more littler, so N in the liquid that produces in the cycle of treatment at different levels, dinethylformamide concentration is also different, N in the liquid that first order process chamber 2 (first circulation) produces, dinethylformamide concentration is the highest, N in the liquid that second level process chamber 3 (second circulation) produces, dinethylformamide concentration is taken second place, the N in the liquid that third level process chamber 4 (the 3rd circulation) produces, dinethylformamide concentration minimum.Therefore when moisturizing, can in third level process chamber 4, mend and go into pure water, in second level process chamber 3, mend the waste water that third level process chamber 4 produces, mend the waste water that second level process chamber 4 produces in the first order process chamber 2.Like this, utilize concentration gradient to carry out moisturizing, can be so that this device recovery DMF be more complete.

The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model spirit essence change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims

1. circulation DMF waste gas recovering device is characterized in that:

2. three circulation DMF waste gas recovering devices according to claim 1, it is characterized in that: the diameter of described air vent is 7～13 centimetres.

3. three circulation DMF waste gas recovering devices according to claim 1, it is characterized in that: the end of described water fender above the Neighbor Set liquid bath is to having bending section.