CN211159281U

CN211159281U - Biological degree of depth oxidation tower of VOCs

Info

Publication number: CN211159281U
Application number: CN201921127058.7U
Authority: CN
Inventors: 刘吉成; 郑博; 罗阳; 杨汉军; 徐建; 崔慧; 祝秀英; 章慧; 王大; 张晓勇; 郑庆生
Original assignee: Sichuan Entech Environment Technology Co ltd
Current assignee: Sichuan Entech Environment Technology Co ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-08-04
Anticipated expiration: 2029-07-17

Abstract

The utility model discloses a VOCs biological deep oxidation tower, which is characterized by comprising a tower body; the bottom of the tower body is provided with a waste gas inlet, and the top of the tower body is provided with an air outlet; a first packing layer, a first spraying system, a second packing layer, a second spraying system and a demister are sequentially arranged in the tower body from bottom to top; a circulating system communicated with the second spraying system is arranged between the first spraying system and the second packing layer; the waste gas inlet is positioned below the first packing layer, and a first spraying liquid storage chamber positioned in the tower body is arranged below the waste gas inlet. The device has the advantages of simple structure, obvious treatment effect, small occupied area, convenient control, simple maintenance and low operation cost.

Description

Biological degree of depth oxidation tower of VOCs

Technical Field

The utility model belongs to the technical field of VOCs biological process handles, concretely relates to biological degree of depth oxidation tower of VOCs.

Background

VOCs (volatile organic compounds) refers to organic compounds with a saturated vapor pressure of more than 133.32Pa at normal temperature, a boiling point of 50-260 ℃ below under a standard atmospheric pressure of 101.3kPa, and an initial boiling point of 250 ℃, or any organic solid or liquid capable of volatilizing at normal temperature and normal pressure.

When VOCs is treated by the existing equipment, the problems of high energy consumption, complex process, low treatment efficiency and the like often exist.

SUMMERY OF THE UTILITY MODEL

The aforesaid is not enough among the prior art, the utility model provides a blood disease control etiology detects work box can effectively solve the problem that current VOCs biological method processing technology midplane area is big, the treatment effeciency is low, the energy consumption is high, the technology is complicated.

For solving the above technical problem, the utility model discloses a technical scheme does:

the provided VOCs biological deep oxidation tower is characterized by comprising a tower body; the bottom of the tower body is provided with a waste gas inlet, and the top of the tower body is provided with an air outlet; a first packing layer, a first spraying system, a second packing layer, a second spraying system and a demister are sequentially arranged in the tower body from bottom to top; a circulating system communicated with the second spraying system is arranged between the first spraying system and the second packing layer;

the waste gas inlet is positioned below the first packing layer, and a first spraying liquid storage chamber positioned in the tower body is arranged below the waste gas inlet.

Preferably, the circulating system comprises a collecting tray positioned between the first spraying system and the second filler layer; the collecting tray is communicated with the second spraying liquid storage chamber through a pipeline extending out of the tower body; the second spraying liquid storage chamber is communicated with a second spraying system through a second circulating pump.

Preferably, the first spray liquid reservoir is in communication with the first spray system via a first circulation pump.

Preferably, the second spraying system comprises a spray pipe communicated with the second circulating pump; the spray pipe is provided with a plurality of spiral spray heads positioned above the second packing layer.

Preferably, the first spraying system comprises a spray pipe communicated with the first circulating pump; the spray pipe is provided with a plurality of spiral spray heads positioned above the first packing layer.

Preferably, the inner wall of the tower body is provided with a flow baffle plate positioned between the collecting tray and the second filler layer.

Preferably, the first packing layer is made of shale or sintered clay, the thickness of the first packing layer is 300-500 mm, and the particle size of the first packing layer is 15-30 mm.

Preferably, the second filler layer is made of shale or sintered clay with a biological bacterial membrane attached, and the thickness of the second filler layer is 400-600 mm.

Preferably, a first access hole and a second access hole are respectively arranged between the first packing layer and the first spraying system and between the second packing layer and the second spraying system.

Preferably, the distance between the first packing layer and the first spraying system is 600-800 mm.

The utility model has the advantages that:

1. the first spraying system and the second spraying system respectively humidify the waste gas entering the tower body, and then the spraying liquid is contacted with the waste gas components under the action of the spiral spray head, so that the treatment efficiency of the subsequent waste gas is improved.

2. The flow baffle can recover the spraying liquid sprayed by the second spraying system to the collecting disc as much as possible, and then the spraying liquid flows back to the second spraying liquid storage chamber through the collecting disc so as to recycle the spraying liquid.

3. The device has the advantages of simple structure, obvious treatment effect, small occupied area, convenient control, simple maintenance and low operation cost.

4. The device can effectively solve the problems of complex process, multiple devices and high one-time investment cost in VOCs treatment.

5. The regular packing that this device adopted is shale or clay sintering and forms, wash-resistant, anti-oxidant, and the service life 8-10 years has reduced traditional packing (bark, plastics) and has used ageing, rotten number of times of changing again after 2-3 years.

Drawings

Fig. 1 is a schematic structural diagram of the device.

Wherein, 1, waste gas inlet; 2. a first filler layer; 3. a first manhole; 4. a first spray system; 5. a collection tray; 6. a flow baffle plate; 7. a second packing layer; 8. a second manhole; 9. a second spray system; 10. a demister; 11. an air outlet; 12. a first circulation pump; 13. a second circulation pump; 14. a first spray fluid reservoir; 15. a second spray fluid reservoir.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.

As shown in figure 1, the biological deep oxidation tower for VOCs comprises a tower body, wherein the bottom of the tower body is provided with a waste gas inlet 1, and the top of the tower body is provided with a gas outlet 11.

As shown in fig. 1, a first packing layer 2, a first spraying system 4, a circulating system, a second packing layer 7, a second spraying system 9 and a demister 10 are sequentially arranged in the tower body from bottom to top, and a first spraying liquid storage chamber 14 is arranged at the bottom in the tower body below the waste gas inlet 1.

As shown in fig. 1, the first packing layer 2 is preferably made of shale or sintered clay, has a thickness of 300-500 mm and a particle size of 15-30 mm, and has the functions of cooling and removing acid and alkali from the exhaust gas, and at the same time, one or more groups of materials can be arranged to pretreat the exhaust gas according to the properties of the exhaust gas.

As shown in fig. 1, the first spraying system 4 can humidify and cool the exhaust gas, and comprises a spraying pipe communicated with the first circulating pump 12; the spray pipe is provided with a plurality of spiral spray heads positioned above the first packing layer 2, meanwhile, the first circulating pump 12 is communicated with the first spray liquid storage chamber 14, and the spray liquid in the first spray liquid storage chamber 14 is liquid containing biological nutrient substances.

As shown in fig. 1, a first access hole 3 positioned on the outer wall of the tower body is also opened between the first spraying system 4 and the first filler layer 2.

As shown in FIG. 1, the second packing layer 7 can further perform acid and alkali removal treatment on the waste gas, and is preferably made of shale or sintered clay, with a thickness of 400-600 mm and a particle size of 8-10 mm, and has a biofilm attached to the surface thereof.

As shown in fig. 1, a circulating system communicated with the second spraying system 9 is arranged between the second packing layer 7 and the first spraying system 4, and the circulating system comprises a collecting tray 5 positioned between the second packing layer 7 and the first spraying system 4; meanwhile, the collecting tray 5 is communicated with a second spraying liquid storage chamber 15 through a pipeline extending out of the tower body; the second spraying liquid storage chamber 15 is communicated with the second spraying system 9 through a second circulating pump 13; and the spray liquid in the second spray liquid reservoir 15 is a liquid containing biological nutrients.

As shown in fig. 1, the second spraying system 9 has the same structure as the first spraying system 4, and comprises a spraying pipe communicated with a second circulating pump 13; the spray pipe is provided with a plurality of spiral spray heads positioned above the second packing layer 7.

As shown in fig. 1, a flow baffle 6 is disposed on the inner wall of the tower body between the collecting tray 5 and the second packing layer 7, the flow baffle 6 has a triangular cross section, and an end of the flow baffle 6 away from the inner wall of the tower body extends into the collecting tray 5 or is on the same vertical line with the edge of the collecting tray 5.

As shown in fig. 1, a second access hole 8 between a second spraying system 9 and a second filler layer 7 is also formed on the outer wall of the tower body.

When handling VOCs waste gas, generally be this device tandem work of one or more, specifically be:

the collected VOCs gas enters the tower body through a waste gas inlet, particulate matters in the VOCs are collected through the first packing layer 2 and the first spraying system 4, dissolved in water molecules, acid-base gas and the like, then the VOCs are cooled and then pass through the second packing layer 7, and then the VOCs are discharged or enter a subsequent treatment system through the demister 10 at the top of the tower.

VOCs waste gas that produces with certain pharmacy chemical industry manufacturing enterprise is handled as the example, and concrete process is:

VOCs of a sewage treatment station of a certain pharmaceutical chemical production enterprise mainly comprises hydrogen sulfide, ammonia gas, methyl mercaptan and methyl sulfide. The waste gas treatment capacity is 8000m³H, the instantaneous concentration of hydrogen sulfide can reach 1600mg/m³At a temperature of 25-40 ℃.

Two devices are connected in series, after the process equipment is installed, the filler containing the microbial film is put into the device at one time, and the pretreatment (namely the treatment of the first filler layer 2 and the first spraying system 4) and the adsorption and degradation effects of the biological filler in the device are utilized; the concentration of hydrogen sulfide discharged from the gas outlet 11 of the first VOCs biological deep oxidation tower is reduced to 120mg/m³The treatment efficiency is more than 90 percent, and the detection concentration of the hydrogen sulfide is 1.2mg/m after the treatment by the second VOCs biological deep oxidation tower³Far below the national emission index requirements.

Meanwhile, when the traditional horizontal processing system is used, the equipment size is 10 × 4.5.5 m × 2.5.5 m, the occupied area is 15 × 5.5.5 m, and the occupied area of the device is only 9 × 3.5.5 m, so that the plane occupied area is greatly saved, and the processing efficiency is obvious.

The detailed description is not intended to limit the scope of the patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. A VOCs biological deep oxidation tower is characterized by comprising a tower body; the bottom of the tower body is provided with a waste gas inlet, and the top of the tower body is provided with an air outlet; a first packing layer, a first spraying system, a second packing layer, a second spraying system and a demister are sequentially arranged in the tower body from bottom to top; a circulating system communicated with the second spraying system is arranged between the first spraying system and the second packing layer;

the waste gas inlet is positioned below the first packing layer, and a first spray liquid storage chamber positioned in the tower body is arranged below the waste gas inlet;

the first spraying liquid storage chamber is communicated with a first spraying system through a first circulating pump; the first spraying system comprises a spraying pipe communicated with the first circulating pump; and the spray pipe is provided with a plurality of spiral spray heads positioned above the first packing layer.

2. The biological deep oxidation tower of VOCs according to claim 1, wherein the circulation system comprises a collection tray located between the first spray system and the second packing layer; the collecting tray is communicated with the second spraying liquid storage chamber through a pipeline extending out of the tower body; and the second spraying liquid storage chamber is communicated with a second spraying system through a second circulating pump.

3. The biological deep oxidation tower of VOCs according to claim 2, wherein the second spray system comprises a spray pipe in communication with a second circulation pump; and a plurality of spiral spray heads positioned above the second packing layer are arranged on the spray pipe.

4. The biological deep oxidation tower for VOCs according to claim 1, wherein the inner wall of the tower body is provided with a flow baffle plate between the collection tray and the second filler layer.

5. The biological deep oxidation tower for VOCs according to claim 1, wherein the first packing layer is made of shale or clay and has a thickness of 300 to 500 mm.

6. The biological deep oxidation tower for VOCs according to claim 1, wherein the thickness of the second packing layer is 400-600 mm.

7. The biological deep oxidation tower for VOCs according to claim 1, wherein a first access hole and a second access hole are respectively arranged between the first packing layer and the first spraying system and between the second packing layer and the second spraying system.

8. The biological deep oxidation tower for VOCs according to claim 1, wherein the distance between the first packing layer and the first spraying system is 600-800 mm.