CN1772341A

CN1772341A - A method and device for removing volatile organic compounds

Info

Publication number: CN1772341A
Application number: CNA2004100946467A
Authority: CN
Inventors: 淮秀兰; 王唯威; 董兆一
Original assignee: Institute of Engineering Thermophysics of CAS
Current assignee: Institute of Engineering Thermophysics of CAS
Priority date: 2004-11-11
Filing date: 2004-11-11
Publication date: 2006-05-17

Abstract

A method for removing VOC, blowing the indoor air containing VOC through the porous adsorption material for circulation, using the porous adsorption material to absorb the VOC components in the air, and then cleaning the VOC on the porous adsorption material with the heated atmosphere The air desorbs down. The device used to realize the above method is a runner loaded with porous adsorption material, and there are several micropores on the runner; the runner is placed in a box, and a low-speed motor drives the runner to rotate. There is a partition in the box to divide the box into two areas, one of which is the adsorption area and the other is the regeneration area. The two sides of the adsorption area and the regeneration area of the box body are oppositely provided with air outlets, wherein the air outlets on both sides of the regeneration area are respectively an air inlet and an air outlet, and the air inlet communicates with the outside.

Description

A kind of method and apparatus of removing volatile organic matter

Technical field

The present invention relates to a kind of method of removing volatile organic matter in indoor and the factory work environment.

The invention still further relates to a kind of device that is used to realize said method.

Background technology

Volatile organic matter (Volatile Organic Compounds, VOC) can damage the ozone layer, produce photochemical fog, simultaneously also be to cause one of the allergy (congenital allergy) that receives much attention in recent years and reason of building syndrome, just the someone points out its influence to earth environment and human body a long time ago.

The generation of VOC mainly contains industry and two aspects of the people's livelihood.The industry aspect, the increase of various product yields causes the deterioration of operating environment.The VOC fecund of industrial circle is born in industries such as oil, adhesive, coating, dry-cleaning, printing, chemical industry, surface clean.People's livelihood aspect is because ecological deterioration problems such as (formaldehyde of newly-built/finishing dwelling house/office building exceed standard) in living space has appearred in the variation of individual housing purchase's national consumption statuses such as increase.In order to improve operating environment and living space environment, generally adopt draft type to remove VOC, but need consuming a large amount of energy, this mode all introduces outdoor air.Therefore, press for the mode that new mode substitutes the whole air of replacing in the past, solve environmental problem and energy problem simultaneously from industry aspect and people's livelihood aspect.

Summary of the invention

The object of the present invention is to provide a kind of method of removing indoor VOC.

Another purpose of the present invention is to provide a kind of device that is used to realize said method.

For achieving the above object, the method of removal VOC provided by the invention, be that blows air over porous adsorbing material with the indoor VOC of containing circulates, with the VOC composition in this porous adsorbing material absorbed air, again the VOC on the porous adsorbing material is got off with the clean air desorption in the atmosphere after being heated, focus on.

The device that is used to realize said method provided by the invention is with being loaded with the runner that porous adsorbing material is made, several micropores being arranged on this runner; This runner is placed in the casing, drive the runner rotation by a slowspeed machine.Have a dividing plate that box house is divided into two zones in the casing, one of them zone is an adsorption zone, and another zone is the renewing zone.

The adsorption zone of casing and both sides, renewing zone relatively offer the air port, and wherein the air port of both sides, renewing zone is respectively an air inlet and a gas outlet, and its air inlet communicates with outdoor.

By said apparatus, the room air that contains VOC enters in the casing by the air inlet of casing adsorption zone, the runner of the rotation of flowing through, VOC composition wherein is adsorbed on the runner, cleaned air passes another relative gas outlet from the casing flow out be recycled to indoor.

The air inlet of casing renewing zone is owing to communicate with outdoor air, so outdoor air is discharged otherwise processed from the gas outlet of renewing zone then from flow through casing and the VOC composition desorption that will be adsorbed on the runner after the heater heating got off of bottom air inlet.Since the rotation of runner, airborne VOC composition successively by after the runner absorption again the regeneration air after being heated purge, make the VOC desorption that is adsorbed on the runner, make that the sorbing material of runner is regenerated, remain its adsorption capacity.

Description of drawings

Fig. 1 is a device schematic diagram of the present invention.

Fig. 2 is the schematic diagram of porous adsorption runner among Fig. 1.

Fig. 3 is the device schematic diagram of experimental example.

Fig. 4 is that embodiment handles the time dependent curve synoptic diagram of forward and backward air formaldehyde concentration.

The specific embodiment

Device of the present invention is a runner casing 2 as shown in Figure 1, and porous adsorption runner 1 places in the casing 2, and this adsorption runner 1 is by a slowspeed machine (not shown) driven rotary.There is a dividing plate 3 runner casing 2 inside, and cabinet space and adsorption runner are divided into adsorption zone 1A and renewing zone 1B.For the ease of showing that dividing plate shown in Figure 1 is a horizontal positioned, box house is divided into two zones that equate up and down, can be unequal two zones in practice, dividing plate 3 also can be to place arbitrarily angledly.Porous adsorption runner 1 is loaded with sorbing materials such as zeolite, silica gel and/or activated carbon, and its carrier surface has corrugated and is provided with the porous runner of several micropores, and its corrugated helps increasing contact area, and micropore is in order to the circulation of air, as shown in Figure 2.The material category for preparing this porous adsorption runner does not have strict the qualification, so long as still indeformable solid material is all passable about 180 ℃.

Method about load sorbing material on the porous runner has many known technologies, is metal or when nonmetal such as the runner material, can apply one deck sorbing material in wheel surface; If runner macromolecular material injection moulding then can will be injection molded into runner after sorbing material and the macromolecular material blend, or the like.The space of the method for load sorbing material, runner casing is provided with and slowspeed machine drives technology such as runner and is known technology on the relevant porous runner, is readily appreciated that and imagines, does not describe at this.

Adsorption zone 1A and renewing zone 1B have the air port in the relative casing in runner casing 2 both sides, the air port that wherein relative adsorption zone 1A both sides are offered, one is adsorption zone air inlet 2A, another is adsorption zone air outlet 2B: the air that contains the VOC composition is entered the adsorption zone 1A of runner casing 2 by adsorption zone air inlet 2A, through hole 1C on the porous of the flowing through adsorption runner 1, the VOC composition is attracted on the porous adsorption runner 1, to remove airborne VOC composition; Discharge by adsorption zone air outlet 2B through the cleaned air after porous adsorption runner 1 purified treatment.

In order to keep the adsorption capacity of porous adsorption runner 1, offer two air ports in 1B both sides, renewing zone, be renewing zone air inlet 2C and renewing zone air outlet 2D.Renewing zone air inlet 2C communicates with outdoor air, enter renewing zone 1B after the heating of air heater via, make the VOC composition desorption on the porous adsorption runner 1 that rotates to the renewing zone, the air that has the VOC composition is discharged centralized and unified processing (about handling the gas that has the VOC composition of discharging from the renewing zone air outlet from renewing zone air outlet 2D, not emphasis of the present invention, do not describe yet.And actual processing method is a lot, dilute such as directly being discharged in the atmosphere, or running into tank is transported to appointed place etc.).

Porous adsorption runner 1 behind the desorption continues to rotate to adsorption zone 1A, adsorbs the VOC composition again, and when rotating to renewing zone 1B, the VOC composition of absorption circulates by that analogy again by desorption.Indoor VOC components and concentration constantly reduces thus, up to removing fully.

For increasing the desorption effect, the air intake of renewing zone air inlet 2C can be heated to about 80-150 ℃, form hot blast and carry out desorption.

The present invention can be widely used in and remove VOC class harmful substance in the room air, and is especially effective especially to the environment of high concentration VOC.Lift an experimental example below, can know by this experimental example and understand actual effect of the present invention.

Experimental example

See also Fig. 3, device schematic diagram for this experimental example, wherein case 10 takes place is one to be of a size of the lucite casing of 1m * 1m * 1m to VOC, place glassware 11 and the fan 12 that fills VOC in the casing respectively, the glassware 11 that fills VOC is used to produce VOC class harmful substance, the effect of fan 12 is to quicken the VOC diffusion to make the concentration that VOC in the case 10 takes place even, so that the actual high concentration VOC space environment of simulation.Runner case 2 is described as the front.Wherein be connected with pipeline between the adsorption zone air outlet 2B of runner case 2 and the air inlet 13 that case 10 takes place.

Case 10 takes place with filling to put into behind glassware 11 weighings of VOC, open porous adsorption runner and the fan 12 that takes place in the case 10 in the runner case 2, the air that contains VOC is returned to the air inlet 13 that case 10 takes place by adsorption zone air outlet 2B by pipeline and to take place in the case 10 after the absorption of porous adsorption runner.In system's running, detect the concentration that the air that takes place in the case 10 is measured its VOC in different time sections.Behind the EOT glassware 11 that fills VOC is taken out weighing from case 10 takes place, the weight difference that before the test and test back is twice is exactly the VOC total amount that vapors away in the test process.

According to the described method of experimental example, concentration of formaldehyde as seen from Figure 4, passes through the processing of porous adsorption runner over time as shown in Figure 4 before and after the processing that test obtains, and airborne VOC concentration significantly reduces, and removal effect is remarkable.

Claims

1. method of removing volatile organic matter, the indoor blows air over porous adsorbing material that contains the volatile organic matter composition is circulated, with the volatile organic matter composition in this porous adsorbing material absorbed air, again the volatile organic matter on the porous adsorbing material is got off with the air desorption in the atmosphere.

2. device that is used to realize said method has the runner of a supported porous sorbing material, and several micropores are arranged on this runner; This runner places in the casing, drives the runner rotation by a slowspeed machine; Have a dividing plate that box house is divided into two zones in the casing, one of them zone is an adsorption zone, and another space is the renewing zone; Adsorption zone and both sides, renewing zone relatively offer the air port, and wherein the air inlet of renewing zone communicates with outdoor;

By said apparatus, the air that contains the volatile organic matter composition enters the runner casing by the adsorption zone air inlet, and the volatile organic matter composition is adsorbed on the runner, and cleaned air passes is discharged by the adsorption zone air outlet; Outdoor air by the renewing zone air inlet flow through casing and be heated after the volatile organic matter composition desorption that will be adsorbed on the runner get off, discharge from the gas outlet of renewing zone then.

3. the device of claim 2 is characterized in that, the dividing plate in the casing is arbitrarily angled placement.

4. the device of claim 2 is characterized in that, two regional percentages that box house is divided into are adjustable.

5. the device of claim 2 is characterized in that, porous adsorbing material is zeolite, silica gel and/or activated carbon.

6. the device of claim 2 is characterized in that, runner is made by heat proof material.

7. the device of claim 2 is characterized in that, attached wheel surface has corrugated.

8. the device of claim 2 is characterized in that, the air intake of renewing zone air inlet adds to 80-150 ℃ of renewing zone that enters runner again for the surrounding air heater via.