CN211612143U

CN211612143U - Asphalt oil smoke waste gas treatment system

Info

Publication number: CN211612143U
Application number: CN202021357922.5U
Authority: CN
Inventors: 鲁恒; 杨立贵
Original assignee: Aerospace Kaitian Environmental Technology Co Ltd
Current assignee: Aerospace Kaitian Environmental Technology Co Ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2020-10-02
Anticipated expiration: 2030-07-13

Abstract

The utility model discloses an asphalt oil smoke waste gas treatment system, which comprises a washing tower, a demister, a cyclone separator, a photocatalytic oxidation device and an active carbon adsorption device which are sequentially connected in series through air pipes, wherein the air pipes are provided with traction fans; the other microbubble generator that is equipped with of scrubbing tower, the both ends of microbubble generator pass through the circulating pipe intercommunication in the different positions of scrubbing tower, be equipped with the circulating pump on the circulating pipe, absorption liquid in the scrubbing tower warp at the bottom of the tower from the top of the tower spraying after the circulating pump pressure boost and down. The treatment system has the advantages of high purification efficiency, small occupied area and low operation cost.

Description

Asphalt oil smoke waste gas treatment system

Technical Field

The utility model belongs to the technical field of pitch production trade waste gas treatment, especially, relate to a pitch oil smoke waste gas treatment system.

Background

The asphalt fume is mainly composed of gas phase and liquid phase, the liquid phase part is very fine volatile condensate, the particle size is more between 0.1 and 1.0 μm, the minimum is about 0.01 μm, the maximum is about 10 μm, and the gas phase is a mixture of different gases. For such low-concentration and extremely dispersed zero asphalt smoke, it is impossible to purify it by a conventional method, and there are 4 types of purification methods currently used, namely, an electric capture method, an adsorption method, an absorption method, and a combustion method.

(I) an electric trapping method; the method has the advantages that the collected asphalt is tar-like and is dissolved in benzene or cyclohexane, and can be returned to a production system or used as fuel; the disadvantage is that the electric catching method has higher requirement on the smoke temperature; the collection efficiency of the dry type electric collection on gas-phase components is almost equal to zero, while the wet type electrostatic collector can collect gaseous asphalt, but increases the cost of sewage treatment equipment and maintenance; and the purification efficiency is reduced after long-term operation; large one-time investment and large occupied area.

(II) an adsorption method; the method has the advantages of simple process, high purification efficiency, low investment, low operating cost, convenient operation and no secondary pollution; the defects are that the system resistance is large and the occupied area is large.

(III) absorption method; the absorption method has the advantages of simple equipment, convenient maintenance, small system resistance, low energy consumption, low operating cost and the defects of secondary pollution and low purification efficiency.

(IV) a combustion method; the method has the disadvantages of high removal efficiency, high requirement on temperature, high energy consumption and high operating cost.

In summary, it is a technical problem to be solved urgently at present to provide an asphalt oil smoke waste gas treatment system with high purification efficiency, small floor area and low operation cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pitch oil smoke waste gas treatment system, this treatment system have purification efficiency height, and area is little, and the advantage that the running cost is low.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the utility model provides an asphalt oil smoke waste gas treatment system, includes scrubbing tower, defroster, cyclone, photocatalytic oxidation device and active carbon adsorption device that establish ties in proper order through the tuber pipe, be equipped with the draught fan on the tuber pipe.

Specifically, the other microbubble generator that is equipped with of scrubbing tower, the both ends of microbubble generator pass through the circulating pipe intercommunication in the different positions of scrubbing tower, be equipped with the circulating pump on the circulating pipe, absorption liquid in the scrubbing tower warp at the bottom of the tower sprays from the top of the tower after the circulating pump pressure boost and falls.

Specifically, a dosing box is also arranged beside the washing tower and is communicated with the washing tower.

Specifically, the scrubbing tower adopts the whirl board tower, from the bottom up is equipped with packing layer and whirl board in proper order in the whirl board tower, the defroster sets up the top of whirl board tower.

Specifically, the photocatalytic oxidation device is internally provided with a UV lamp tube and a photocatalyst filter screen.

Specifically, the activated carbon adsorption device is internally provided with columnar activated carbon.

Specifically, the tail end of the air pipe is connected with the cupola pipe.

Specifically, the traction fan is arranged between the cupola tube and the activated carbon adsorption device.

Compared with the prior art, the utility model discloses the beneficial effect who has lies in:

1. the utility model discloses pitch oil smoke waste gas treatment system has synthesized multiple processing structure, has effectively improved pitch oil smoke waste gas treatment efficiency to fine security has, organic waste gas treatment is efficient

2. The system is simple to operate, can realize normal-temperature treatment, effectively treats the wastewater, reduces the treatment difficulty after the wastewater is discharged, and has the advantages of small size, simple structure and safe operation of the microbubble generator for treating the wastewater.

3. The ozone removing capability of the activated carbon can also meet the emission requirement on the atmosphere, and can meet the increasingly stricter environmental protection requirement in the future.

4. The treatment system has the advantages of mature and stable technology, simple operation, high purification efficiency, small occupied area and low operation cost, and can be applied to the treatment of oil fume waste gas generated in the production process of most of asphalt from raw materials to finished products.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a structure of a system for treating exhaust fumes from asphalt provided by an embodiment of the present invention;

FIG. 2 is a schematic sectional view of an asphalt lampblack waste gas treatment system provided by an embodiment of the present invention;

wherein: 1-air inlet pipe

2-dosing chest

3-water pipe one

4-washing tower

5-water pipe 2

6-micro bubble generator

7-pipeline one

8-cyclone separator

9-pipeline two

10-photocatalytic oxidation device

11-three pipeline

12-active carbon adsorption device

13-four pipeline

14-traction fan

15-five pipeline

16-cupola tube

17-packing layer

18-swirl plate

19-demister

20-water pipe three

21-four water pipe

22-circulation pump

23-UV lamp tube

24-photocatalyst filter screen

25-column activated carbon.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and 2, an asphalt oil smoke waste gas treatment system comprises a washing tower 4, a demister 19, a cyclone separator 8, a photocatalytic oxidation device 10 and an active carbon adsorption device 12 which are sequentially connected in series through air pipes, wherein a traction fan 14 is arranged on each air pipe, the tail end of each air pipe is connected with a cupola pipe 16, and the traction fan 14 is arranged between the cupola pipe 16 and the active carbon adsorption device 12.

Referring to fig. 1 and fig. 2, specifically, the washing tower 4 is a cyclone plate tower, an air outlet of the cyclone plate tower is communicated with an air inlet of a cyclone separator 8 through a first pipeline 7, an air outlet of the cyclone separator 8 is communicated with an air inlet of a photocatalytic oxidation device 10 through a second pipeline 9, an air outlet of the photocatalytic oxidation device 10 is communicated with an air inlet of an activated carbon adsorption device 12 through a third pipeline 11, an air outlet of the activated carbon adsorption device 12 is communicated with an air suction port of a traction fan 14 through a fourth pipeline 13, and an air outlet of the traction fan 14 is communicated with an air-blast pipe 16 through a fifth pipeline 15.

In the embodiment of the application, the asphalt oil smoke waste gas enters the washing tower 4 through the air inlet pipe 1 at the side part of the bottom end of the washing tower 4, the waste gas and the absorption liquid are in gas-liquid two-phase contact, particulate matters or oil mist suspended in the gas are removed in the water washing process, the gas treated by the washing tower 4 is dehydrated and demisted by the demister 19 and then enters the cyclone separator 8 to remove oil and water generated in the previous stage treatment process, the gas treated by the cyclone separator 8 enters the photocatalytic oxidation device 10 to degrade macromolecular substances in the gas into micromolecular substances in an ultraviolet photolysis mode, the original micromolecular substances are directly catalyzed and oxidized into CO2 and H2O, the waste gas is treated by the previous stages, the waste gas is suitable for adsorption, the active carbon adsorption device 12 is adopted to adsorb organic pollutants remaining in the waste gas to remove VOC components and odor substances in the waste gas, ensuring that the waste gas can reach the emission standard.

Referring to fig. 1 and 2, it can be understood that, in practical applications, a micro-bubble generator 6 may be disposed beside the washing tower 4, the washing tower 4 is communicated with a water inlet of the micro-bubble generator 6 through a water pipe two 5, the micro-bubble generator 6 is connected with a circulating pump 22 through a water pipe three 20, and the circulating pump 22 returns to the washing tower 4 through a water pipe four 21.

In the embodiment of the application, the absorption liquid is sprayed down from the top of the tower after being pressurized by the circulating pump 22 at the bottom of the tower, and finally flows back to the bottom of the tower for recycling, water (absorption liquid) in the washing tower 4 enters the micro-bubble generator 6 through a pipeline, and the ultra-fine bubbles generated by the micro-bubble generator 6 generate instantaneous high pressure after being burst, so that dissolved oxygen and high-concentration oxygen negative ions in the water body are increased, the high-efficiency decomposition of various organic waste gases is realized, the molecular chain structure of organic matters is broken, and the purposes of cleaning water sources and reducing the difficulty in wastewater treatment are achieved.

Referring to fig. 1 and fig. 2, it should be explained that, in the practical design, the packing layer 17 and the cyclone plate 18 are sequentially arranged in the cyclone plate tower from bottom to top, the demister 19 is arranged at the top of the cyclone plate tower, and when the waste gas passes through the cyclone plate 18 inside the cyclone plate tower, the two-phase contact between the waste gas and the absorption liquid is strengthened, and the purification effect of the waste gas is improved.

In some possible embodiments, a dosing tank 2 can be provided next to the washing tower 4, and the dosing tank 2 is communicated with the cyclone plate tower through a water pipe 3 with a pump body. Because the asphalt oil fume waste gas contains a small amount of sulfide and has large smell, proper alkali liquor can be added into the spray tower through the dosing tank 2, and the waste gas is firstly subjected to spray alkali cleaning, so that the aims of removing dust, sulfide and partial peculiar smell are fulfilled.

Referring to fig. 1 and fig. 2, in addition, a UV lamp tube 23 and a photocatalyst filter net 24 are installed in the photocatalytic oxidation apparatus 10, and the photocatalyst filter net 24 generates a strong catalytic degradation function under the action of the UV lamp tube 23 to break the organic waste gas molecules and further oxidize and reduce the organic waste gas molecules to break molecular chains; meanwhile, oxygen and water in the air are decomposed to obtain high-concentration ozone, the ozone further absorbs energy to form free hydrocarbon groups with higher oxidation performance, and exhaust gas molecules are oxidized, so that the aim of purifying the organic exhaust gas is fulfilled. The gas after the photocatalytic oxidation treatment enters the activated carbon adsorption device 12, the redundant ozone in the gas is adsorbed and purified by the columnar activated carbon 25 in the activated carbon adsorption device 12, and the adsorbed clean air is discharged into the outdoor atmosphere through the traction fan 14 and the cupola tube 16.

Referring to fig. 1 and 2, the process of treating the asphalt lampblack waste gas by using the asphalt lampblack waste gas treatment system is as follows:

asphalt oil smoke waste gas generated in the asphalt production process enters the cyclone plate tower from the air inlet pipe 1 and passes through the inner cyclone plate 18, and the waste gas and the absorption liquid are in full gas-liquid two-phase contact. Oily substances in the exhaust gas are adsorbed by water and transferred to water. The organic waste gas is purified, dewatered and demisted by a demister 19 and then enters the cyclone separator 8 from the top. The absorption liquid is sprayed down at the top of the tower after being pressurized by a circulating pump 22 at the bottom of the tower, and finally flows back to the bottom of the tower for recycling, water in the cyclone plate tower enters a micro-bubble generator 6 through a pipeline, and ultra-fine bubbles generated by the micro-bubble generator 6 generate instantaneous high pressure after being burst, and simultaneously increase dissolved oxygen and high-concentration oxygen anions in the water body, so that the high-efficiency decomposition of various organic waste gases is realized, and the molecular chain structure of organic matters is broken.

The gas treated by the cyclone plate tower enters a cyclone separator 8, the gas containing oil and water enters the cyclone separator 8 tangentially at high speed from an air inlet, and the airflow changes from linear motion into downward spiral rotary motion along the wall of the cylinder. When the outer cyclone flow reaches the cone portion downward, it approaches the center of the cyclone separator 8 due to the conical contraction. According to the principle that the rotation moment is not changed, the tangential speed of the vortex is continuously improved, the outer vortex reaches the bottom of the cone, then turns upwards, rotates upwards along the axis in the same rotation direction, and finally is discharged through the air outlet. When the airflow rotates, part of large dust particles firstly contact with the wall of the device, lose inertia force, slide downwards along the wall under the drive of gravity and rotating fluid, and finally are discharged out of the cyclone cylinder from the ash discharge pipe at the conical bottom, and the rest of smaller particles overcome the confluence resistance under the action of centrifugal force and are continuously separated at the cylinder body and the cone body.

The gas treated by the cyclone separator 8 enters the photocatalytic oxidation device 10, and a photocatalyst filter screen 24 in the photocatalytic oxidation device 10 generates a strong catalytic degradation function under the action of the UV lamp tube 23, so that organic waste gas molecules are crushed and further oxidized and reduced, and molecular chains of the organic waste gas molecules are broken; meanwhile, oxygen and water in the air are decomposed to obtain high-concentration ozone, the ozone further absorbs energy to form free hydrocarbon with higher oxidation performance, and exhaust gas molecules are oxidized, so that the aim of purifying the organic exhaust gas is fulfilled. The purified gas enters an activated carbon adsorption device 12, redundant ozone in the gas is adsorbed and purified through the internal columnar activated carbon 25, peculiar smell in the gas is removed, and the adsorbed clean air is discharged from the lower part of the adsorption chamber and finally discharged into outdoor atmosphere through a traction fan 14 and a cupola tube 16.

The pitch oil smoke waste gas treatment system that this embodiment provided has following advantage: 1) various treatment methods are integrated, the treatment efficiency of the asphalt oil fume waste gas is effectively improved, and the safety is good; the organic waste gas efficiency is high; 2) the system is simple to operate, normal-temperature treatment can be realized, the wastewater is effectively treated, the treatment difficulty after the wastewater is discharged is reduced, and the microbubble generator 6 for treating the wastewater is small in size, simple in structure and safe to operate; 3) the ozone removing capability of the activated carbon can also meet the emission requirement on the atmosphere, and can meet the increasingly stricter environmental protection requirement in the future; 4) the treatment system has the advantages of mature and stable technology, simple operation, high purification efficiency, small occupied area and low operation cost, and can be applied to the treatment of oil fume waste gas generated in the production process of most of asphalt from raw materials to finished products.

The above examples are merely illustrative of the present invention clearly and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Nor is it intended to be exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims

1. The utility model provides a pitch oil smoke waste gas treatment system which characterized in that: the device comprises a washing tower, a demister, a cyclone separator, a photocatalytic oxidation device and an active carbon adsorption device which are sequentially connected in series through air pipes, wherein the air pipes are provided with traction fans;

the other microbubble generator that is equipped with of scrubbing tower, the both ends of microbubble generator pass through the circulating pipe intercommunication in the different positions of scrubbing tower, be equipped with the circulating pump on the circulating pipe, absorption liquid in the scrubbing tower warp at the bottom of the tower from the top of the tower spraying after the circulating pump pressure boost and down.

2. The asphalt fume exhaust gas treatment system according to claim 1, characterized in that: and a dosing box is also matched beside the washing tower and is communicated with the washing tower.

3. The asphalt fume exhaust gas treatment system according to claim 2, characterized in that: the washing tower adopts the whirl board tower, from the bottom up is equipped with packing layer and whirl board in proper order in the whirl board tower, the defroster sets up the top of whirl board tower.

4. The asphalt fume exhaust gas treatment system according to any one of claims 1 to 3, characterized in that: and the photocatalytic oxidation device is internally provided with a UV lamp tube and a photocatalyst filter screen.

5. The asphalt fume exhaust gas treatment system according to claim 4, characterized in that: and columnar activated carbon is filled in the activated carbon adsorption device.

6. The asphalt fume exhaust gas treatment system according to claim 4, characterized in that: the tail end of the air pipe is connected with the cupola pipe.

7. The asphalt fume exhaust gas treatment system according to claim 6, characterized in that: the traction fan is arranged between the cupola tube and the activated carbon adsorption device.