CN201862397U

CN201862397U - Reaction device for absorbing off-gas ozone

Info

Publication number: CN201862397U
Application number: CN2010205629765U
Authority: CN
Inventors: 王群; 黄涛; 马军; 赵乘寿; 张静
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-06-15
Anticipated expiration: 2020-10-15

Abstract

The utility model discloses a reaction device for absorbing off-gas ozone, which adopts a superposed tower body structure. A tower body is provided with a first absorption tower and a second absorption tower; an inner chamber is arranged between the first absorption tower and the second absorption tower, and an arc-shaped baffle plate is arranged at the top of the inner chamber; a gas distributing plate communicated with a bottom gas chamber is arranged at the bottom of the first absorption tower, and the bottom gas chamber is communicated with the outside through a gas inlet pipe; and a gas distributing pipe at the bottom of the second absorption tower is communicated with the inner chamber through a gas guide pipe which adopts an inverted U-shaped pipe structure, one end of the gas guide pipe is communicated with the inner chamber through an opening in the middle of the arc-shaped baffle plate, and the other end of the gas guide pipe is communicated with the gas distributing pipe at the bottom of the second absorption tower. The reaction device provided by the utility model can be widely used for absorption treatment of off-gas ozone, and has the advantages of simple technology, small occupied area, good off-gas absorption treatment effect, low running cost and no need of catalyst reactivation.

Description

A kind of reaction unit that is used for the ozone tail gas absorption

Technical field

The utility model belongs to chemical reaction equipment, and especially the ozone tail gas absorption plant is made the field.

Background technology

When ozone was used widely, ozone tail gas was handled the attention that has also obtained people.Ozone is in being added to water the time, because the absorptivity of device is difficult to reach 100%, greatly ozone residue is arranged, can be as the case may be for remaining ozone water factory, sometimes with ozone tail gas as the preliminary treatment oxidant and by reuse, but tail gas discharged still is higher than discharge standard far away.When airborne ozone concentration reaches 0.1 mg/litre, just can make the people feel symptom such as dizzy, that eye is puckery, have sore throat, higher content will be fatal, so these ozone tail gas must can discharge through handling.

Exhaust gas treating method commonly used at present has: activated carbon method, medical method, firing method, hopcalite method.Activated carbon method is a processing method relatively more commonly used at present, it is when absorbing ozone, greatly active carbon also has been consumed, and wherein every processing 5-6 gram ozone can consume 1 gram active carbon, simultaneously in order to prevent the low and dewfall of Yin Wendu, cause active carbon wetted, thereby the reduction capacity of decomposition usually needs to keep the charcoal bed tempertaure at 60 1 80 ℃, has increased operating cost so on the one hand, if temperature control is bad on the other hand, burning or blast can take place in the charcoal layer.Medical method generally need be handled medicament again, has increased treatment process.The firing method treatment effect is better, the influence of ozone concentration before the ozone concentration after the thermal decomposition is not decomposed basically, but generally need temperature〉350 ℃, operating cost is higher." hopcalite " agent catalytic decomposition method is a kind of method relatively more commonly used both at home and abroad at present, but considers to carry out activating and regenerating after 100 hours every 50 – in operation process, and is cumbersome.

Summary of the invention

In view of the above shortcoming of prior art, the purpose of this utility model provides a kind of reaction unit that ozone tail gas absorbs that is used for, and makes it to have that technology is simple, floor space is little, and tail gas absorbs that treatment effect is good, and operating cost is low, and catalyst does not need characteristics such as regeneration.

The purpose of this utility model is to realize by following means.

A kind of reaction unit that is used for the ozone tail gas absorption adopts folded formula housing structure, and tower body has first absorption tower, second absorption tower; Be provided with inner room between first absorption tower and second absorption tower, the top of inner room is a curved baffle; Bottom, first absorption tower has the air distribution plate that communicates with the bottom air chamber, and described bottom air chamber has air inlet pipe and exterior; The gas distribution pipe of bottom, second absorption tower communicates with inner room by wireway, and described wireway is one and is inverted the U-shaped tubular construction, and an end communicates with inner room by the opening at curved baffle middle part, and the other end communicates with the gas distribution pipe of bottom, second absorption tower.

Adopt the ozone tail gas absorption reaction device of structure of the present utility model, have that technology is simple, floor space is little, tail gas absorbs that treatment effect is good, and operating cost is low, and catalyst does not need the advantage of regenerating.

Description of drawings

Fig. 1 is the cutaway view of the utility model ozone tail gas absorption reaction device.

Fig. 2 is the structure cutaway view of another embodiment of the utility model.

Fig. 3 is Fig. 1 scheme wireway local location graph of a relation.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment 1:

Referring to Fig. 1, tower body has first absorption tower 1, second absorption tower 2; Be provided with inner room 3 between first absorption tower and second absorption tower, the top of inner room is a curved baffle 4; Bottom, first absorption tower has the air distribution plate 6 that communicates with bottom air chamber 5, and described bottom air chamber has air inlet pipe 7 and exterior; The gas distribution pipe 8 of bottom, second absorption tower communicates with inner room by wireway 9, and described wireway 9 is one and is inverted the U-shaped tubular construction, and as shown in Figure 3, an end communicates with inner room by the opening at curved baffle 4 middle parts, and the other end communicates with the gas distribution pipe 8 of bottom, second absorption tower.Air distribution plate 6 is arranged in the bottom on absorption tower 1, and air distribution plate 10 is arranged in the bottom on second absorption tower.The air distribution plate bearing catalyst which is provided with little qi-emitting hole.Moisturizing valve 11 is set on absorption tower 2, reactor is carried out moisturizing regularly.13,14 is catalyst, 15 pressure-control valves, 16 blow-down pipes, 17 blow-down pipe valves, and 18 is the control liquid level on second absorption tower.

Air inlet pipe 7 is goed deep into the middle part of reactor, and pressure in the reactor and processing gas flow are regulated by the valve and the pressure-control valve on the blast pipe 15 that are arranged on the air inlet pipe 7.A check-valves 19 is set on air inlet pipe 7, prevent since system when out of service water reflux.Gas is entered in the reactor by air inlet pipe 7, and the air distribution plate 6 that is provided with through the bottom carries out even gas distribution, contacts with catalyst 13 and water on the air distribution plate simultaneously, all is provided with little qi-emitting hole above the air distribution plate, and its material mainly is to be made by the titanium plate.Upper chamber portion at reactor is a curved baffle 4, perforates in the middle of curved baffle 4, and is connected with wireway 9, in order to prevent water inflow inner room, the wireway highest point exceeds liquid level 18 certain altitudes.The gas that inner room 3 is collected enters gas distribution pipe 8 by wireway 9, contacts with catalyst 14 and water through air distribution plate 10 again, and it is the effect of the even gas distribution of gas that air distribution plate 6 and air distribution plate 10 have not only played, and has played the effect of support top catalyst.Offgas duct is provided with Pressure gauge and pressure-control valve.Blow-down pipe 16 and emptying valve 17 are set, to make things convenient for the emptying of internal water in the bottom of reactor.Because gas can be taken away a part of water in the process of ventilation, so filling pipe and moisturizing valve are set at reactor, regularly reactor is carried out moisturizing, ozone decomposes faster under high pH value, so the pH value of increase water that can be suitable promotes the decomposition of ozone.Catalyst 13 and catalyst 14 can be that catalyst of the same race also can be a catalyst not of the same race, and the catalyst that uses in the utility model is mainly oxide or the hydroxide and the active carbon etc. of zeolites, metal.

The utility model mainly is to improve ozone tail gas by ozone tail gas absorption reactor thermally and employed distinctive catalyst to absorb decomposition efficiency.Catalyst at first, this catalyst that installs important employing is the hydrophobic type catalyst, on the surface of catalyst many micropores is arranged, hole is flourishing especially, makes catalyst have good adsorption property.Its surface almost is electroneutral, has stoped hydrone to enter its hole, more helps ozone and enters its inside, and ozone is had good absorption and catalytic decomposition performance.Different with reactor in the past is, and it does not need the temperature that keeps higher, thereby has reduced operating cost.

Reactor adopts double-deck absorbed layer, is equivalent to two reactors in the past, the absorption efficiency height.Air distribution plate makes ozone distribute more evenly, and after ozone entered Catalytic Layer, water in the reactor and catalyst can absorb ozone simultaneously for a change, and absorption efficiency is higher.

Embodiment 2:

Referring to Fig. 2, the difference of the present embodiment and the specific embodiment one is, difference according to the ozone amount in the ozone tail gas, curved baffle 4, wireway 9 and the gas distribution pipe 8 of reactor have been saved, and moisturizing valve 11 is provided with the middle part of reactor, be the bottom of air distribution plate 10, the top of catalyst 13 place liquid levels.Catalyst 14 is not had by water logging simultaneously.

Claims

1. one kind is used for the reaction unit that ozone tail gas absorbs, and adopts folded formula housing structure, it is characterized in that tower body has first absorption tower, second absorption tower; Be provided with inner room between first absorption tower and second absorption tower, the top of inner room is a curved baffle; Bottom, first absorption tower has the air distribution plate that communicates with the bottom air chamber, and described bottom air chamber has air inlet pipe and exterior; The gas distribution pipe of bottom, second absorption tower communicates with inner room by wireway, and described wireway is one and is inverted the U-shaped tubular construction, and an end communicates with inner room by the opening at curved baffle middle part, and the other end communicates with the gas distribution pipe of bottom, second absorption tower.

2. the reaction unit that be used for ozone tail gas absorption according to claim 1 is characterized in that the height of described wireway is higher than the second absorption tower liquid level.

3. the reaction unit that be used for ozone tail gas absorption according to claim 1 is characterized in that described first absorption tower and second absorption tower have filled catalyst.

4. the reaction unit that be used for ozone tail gas absorption according to claim 1 is characterized in that described bottom air chamber air inlet pipe is provided with check device.