CN216653934U

CN216653934U - Integrated container type asphalt flue gas treatment device

Info

Publication number: CN216653934U
Application number: CN202122770482.7U
Authority: CN
Inventors: 安景华; 张亚通; 何国刚; 蒿庆辉; 王振东; 何亚乾; 顾玉辉; 周轶群; 郭艳浩
Original assignee: Hebei University of Science and Technology; CSCEC Road and Bridge Group Co Ltd
Current assignee: Hebei University of Science and Technology; CSCEC Road and Bridge Group Co Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-06-03
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses an integrated container type asphalt flue gas treatment device, which comprises a water storage tank, an oil washing spray tower and an alkali liquor spray tower which are fixedly connected in sequence; the water storage tank is fixedly connected with a dust removal pretreatment tower, an outlet of the dust removal pretreatment tower is communicated with the water storage tank, and a first pump for conveying water in the water storage tank into the dust removal pretreatment tower is arranged on the water storage tank; the oil washing spray tower and the alkali liquor spray tower are arranged in the container. And starting the heating rod when the oil washing absorption of the light gas substances in the flue gas reaches saturation, stopping heating when the temperature reaches 100 ℃, introducing the light gas substances into the buffer tank, and introducing a combustion fan of the mixing station into the combustor. The dust removal pretreatment tower, the oil washing spray tower and the alkali liquor spray tower are all arranged on the frame of the container, so that the utility model is convenient to move on the road construction site.

Description

Integrated container type asphalt flue gas treatment device

Technical Field

The utility model relates to a waste gas treatment device, in particular to an integrated container type asphalt flue gas treatment device.

Background

Asphalt is a common organic material, and the main sources of asphalt smoke are asphalt processing and asphalt product production, such as petrochemical industry, building waterproofing and highway construction. Of which the most interesting is the construction of asphalt road surfaces. The road surface constructed by the asphalt has good bearing performance, and the asphalt becomes one of indispensable materials in road surface construction due to the advantages of strong elastic-plastic property, low noise, smooth and comfortable traffic and the like. However, a large amount of asphalt smoke can be generated in the processing process of the asphalt, and the smoke contains aromatic hydrocarbon pollutants such as benzopyrene and the like, so that the asphalt smoke needs to be treated and then is discharged. Traditional pitch flue gas is handled and needs to use a plurality of treatment facility, intercommunication each other between the equipment, and area is big, removes inconveniently or can't remove.

At present, asphalt smoke mainly adopts the following treatment method:

in the combustion method, part of gas organic matters in the asphalt smoke are extremely difficult to decompose and oxidize, strong carcinogens such as dioxin are easily generated when the asphalt smoke is not completely combusted, and the combustion temperature is up to 1000-1200 ℃, so that the operation cost is improved; in the catalytic combustion method, the catalytic combustion temperature is 300 ℃, while the asphalt flue gas mainly contains complex components, mainly aromatic hydrocarbon pollutants, and the pollutants in the asphalt flue gas cannot be completely treated due to low combustion temperature.

The plasma method and the plasma method are easy to cause the phenomenon of incomplete decomposition of aromatic hydrocarbon organic matters in the gas treatment, so that secondary pollution of the gas is caused, the flue gas of the asphalt mixing station contains a large amount of dust, electric sparks are easy to generate in the using process, and simultaneously, the configuration design, the manufacturing precision and the strict density of components in equipment have high requirements in the process of the process.

The asphalt smoke contains complex annular aromatic compounds, a single photocatalyst can only catalyze one or a class of substances with simple structures, and the UV photolysis technology can only purify a small part of organic matters in the asphalt smoke. The smoke dust in the asphalt smoke also needs to be treated to meet very high requirements, so that the UV photolysis technology has no practical value in the treatment of the asphalt smoke.

The biological purification method needs a large contact surface for treating the organic waste gas so as to ensure that the organic gas can be fully contacted with microorganisms. And the suitable range of the growth environment of the microorganism is small, and the living conditions are harsh and difficult to control. The existing biological purification method is not suitable for organic gas with high concentration, complex components, difficult water dissolution and strong biological toxicity.

The adsorption method has the advantages that the mixing station has large air volume for treating the asphalt flue gas, the total content of organic matters in the asphalt flue gas is high, the updating frequency of the required active carbon in production and operation is high, the updating cost required to be paid is very high, and the active carbon which is difficult to desorb after adsorbing the organic matters belongs to solid waste. Solid waste generated by an adsorption method is difficult to treat, the flow rate of asphalt smoke is high, and the penetration time in an activated carbon filter is short. Therefore, the method is not suitable for treating asphalt fume of the mixing station.

The asphalt smoke has great harmfulness to animals and human beings, has complex components and more than one hundred different organic pollutants, wherein 81 pollutants are known, and the pollutants with high toxicity comprise benzopyrene, anthracene naphthalene, pyridine, phenols and the like. Most of the compounds are mixed in other organic matters in the asphalt smoke and are extremely difficult to treat. The existing asphalt flue gas treatment devices have the problems of different degrees, such as single function, dispersed device structure, poor treatment effect, incapability of moving and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing an integrated container type asphalt flue gas treatment device, which is used for treating asphalt flue gas in the construction of a road asphalt pavement so as to solve the problem that the asphalt treatment device in the prior art is inconvenient to move.

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

an integrated container type asphalt flue gas treatment device is characterized by comprising a water storage tank, an oil washing spray tower and an alkali liquor spray tower which are fixedly arranged in a frame of a container in sequence; the water storage tank is fixedly connected with a dust removal pretreatment tower, an outlet of the dust removal pretreatment tower is communicated with the water storage tank, and a first pump for conveying water in the water storage tank into the dust removal pretreatment tower is arranged on the water storage tank; the washing oil spray tower is internally provided with a washing oil spray head at the upper part, and the washing oil spray tower is provided with a second pump for conveying the washing oil stored in the washing oil spray tower to the washing oil spray head; an alkali liquor spray head is arranged at the upper part in the alkali liquor spray tower, and a third pump for conveying alkali liquor in the alkali liquor storage tank to the alkali liquor spray head is arranged on the alkali liquor spray tower; the water storage tank, the oil washing spray tower and the alkali liquor spray tower are sequentially communicated, the communicated positions are all above the liquid level, and the alkali liquor spray tower is provided with a smoke outlet.

Furthermore, a first demister is arranged on the oil washing spray tower, an outlet of the first demister is communicated with the alkali liquor spray tower, and an inlet of the first demister is positioned above the oil washing spray nozzle in the oil washing spray tower.

Furthermore, the first demister is a wire mesh demister fixedly arranged above the washing oil spray head in the washing oil spray tower, and the upper part of the wire mesh demister is communicated with the alkali liquor spray tower.

Furthermore, a second demister is arranged on the alkali liquor spray tower, an outlet of the second demister is communicated with the smoke outlet, and an inlet of the second demister is positioned above the alkali liquor spray head in the alkali liquor spray tower.

Further, the device also comprises a cooling tower and a buffer tank; an oil washing groove is formed in the bottom of the oil washing spraying tower, an oil-rich regeneration pool is arranged in the oil washing groove, the inside and the outside of the oil-rich regeneration pool are communicated, an electric heating rod is arranged in the oil-rich regeneration pool, the bottom of the oil-rich regeneration pool is connected with an oil discharge pipe, the oil discharge pipe is connected with an inlet of a cooling tower, a circulating pump is arranged on the oil discharge pipe, and an outlet of the cooling tower is communicated with the oil washing groove outside the oil-rich regeneration pool; and a gas discharge pipe is connected between the top of the rich oil regeneration tank and an inlet of the buffer tank, and an outlet of the buffer tank is connected with a combustion fan of a mixing station for asphalt production.

Furthermore, an alkali liquor dilution tank is fixedly arranged outside the alkali liquor spray tower, a stirrer is arranged in the alkali liquor dilution tank, and a liquid outlet of the alkali liquor dilution tank is communicated with the bottom of the alkali liquor spray tower.

Furthermore, a first packing layer is fixedly arranged between the liquid level of the washing oil spray tower and the washing oil spray head.

Further, a second packing layer is fixedly arranged between the liquid level of the alkali liquor spray tower and the alkali liquor spray head.

The utility model has the positive effects that:

1. the utility model is provided with a dedusting pretreatment tower, which can pretreat the flue gas, cool the flue gas and separate out most of solid particles and organic matters.

2. The utility model is provided with the oil washing spray tower, can further absorb organic matters in the flue gas and reduce the content of the organic matters in the flue gas.

3. The utility model is provided with the alkali liquor spray tower, and can absorb organic matters with peculiar smell in the smoke.

4. The utility model is provided with a container, and the dust removal pretreatment tower, the washing oil spray tower and the alkali liquor spray tower are all arranged on the frame of the container, so that the utility model is convenient to move on a road construction site.

Drawings

FIG. 1 is a front view of embodiment 1;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a schematic structural view of example 2;

FIG. 5 is a schematic structural view of example 3;

FIG. 6 is a top view of FIG. 1;

in the figure, 1, a dedusting pretreatment tower; 2. a buffer tank; 3. a gas discharge pipe; 4. a liquid discharge pipe; 6. a first flue gas channel; 7. A water storage tank; 8. an oil washing tank; 9. a first filler layer; 10. a second flue gas channel; 11. a wash oil spray tower; 12. a first wire mesh mist eliminator; 13. a second wire mesh mist eliminator; 14. an alkali liquor storage tank; 15. a second packing layer; 16. a third flue gas channel; 17. an alkali liquor spray tower; 18. a third wire mesh demister; 19. a fourth wire mesh demister; 20. a smoke outlet; 21. a fifth wire mesh demister; 22. a vertical clear water spray pump; 23. a vertical oil washing spray pump; 24. an alkali liquor diluting tank; 25. alkali liquor vertical stirrers; 26. a vertical alkali liquor spray pump; 27. a clear water spray pipeline; 28. a wash oil spray line; 29. an alkali liquor spraying pipeline; 30. a platform; 31. a distribution box; 32. a liquid level meter; 33. a water replenishing port; 34. a rich oil regeneration tank; 35. an electrical heating rod; 36. an oil discharge pipe; 37. a wastewater discharge outlet; 38. a wash oil drain; 39. an alkali liquor drain outlet; 40. a frame; 41. A first through hole; 42. a cooling tower; 43. a second via.

Detailed Description

In fig. 3 and 6, the arrow indicates the direction of flow of the flue gas.

Example 1

As shown in fig. 1 to 3 and fig. 6, an integrated container type asphalt flue gas treatment device comprises a container, wherein a platform 30 is arranged at the top of a frame 40 of the container, and a water storage tank 7, an oil washing spray tower 11 and an alkali liquor spray tower 17 are fixedly arranged in the frame 40 from left to right in sequence. Platform 30 is through bolt fixedly connected with dust removal preliminary treatment tower 1 in aqua storage tank 7 top, 1 lower extreme in dust removal preliminary treatment tower is fluid-discharge tube 4, the aquatic in the aqua storage tank 7 is inserted downwards to fluid-discharge tube 4. A first pump is fixedly arranged on the water storage tank 7 and is a vertical clean water spray pump 22. The upper portion of spraying in the preliminary treatment tower 1 is equipped with the clear water shower nozzle, the clear water shower nozzle sprays the export that pipeline 27 and vertical clear water sprayed pump 22 through the clear water and links to each other, vertical clear water sprays the aquatic that the import of pump 22 is located aqua storage tank 7, and the top of spraying preliminary treatment tower 1 is for advancing the mouth of cigarette.

The washing oil spray tower 11 is internally provided with a washing oil spray head at the upper part, the washing oil spray tower 11 is provided with a washing oil groove 8 at the lower part, and washing oil is filled in the washing oil groove 8. The oil washing tank 8 is fixedly provided with a second pump, the second pump is a vertical oil washing spray pump 23, an outlet of the vertical oil washing spray pump 23 is connected with an oil washing spray head through an oil washing spray pipeline 28, and an inlet of the oil washing spray pump extends into the oil washing tank 8.

The oil washing spray tower 11 is provided with a first demister, the first demister is a first wire mesh demister 12 and a second wire mesh demister 13 which are fixedly arranged above the oil washing spray head, the first wire mesh demister 12 and the second wire mesh demister 13 are connected with each other to form a V shape, a connecting part of the first wire mesh demister 12 and the second wire mesh demister 13 is provided with a downward first partition plate, the first partition plate downwards extends into the oil washing tank 8, the right side of the first partition plate is a second flue gas channel 10, and the second flue gas channel 10 is communicated with the inside of the alkali liquor spray tower 17.

An alkali liquor spray head is arranged at the upper part in the alkali liquor spray tower 17, an alkali liquor storage tank 14 is arranged at the lower part of the alkali liquor spray tower 17, and alkali liquor is filled in the alkali liquor storage tank 14. The alkali lye storage tank 14 is fixedly provided with a third pump, the third pump is a vertical alkali lye spray pump 26, the outlet of the vertical alkali lye spray pump 26 is connected with an alkali lye spray head through an alkali lye spray pipeline 29, the inlet of the vertical alkali lye spray pump 26 extends into the alkali lye storage tank 14, the alkali lye spray tower 17 is provided with a smoke outlet 20, and the smoke outlet 20 is positioned above the liquid level of the alkali lye.

The alkali liquor spray tower 17 is provided with a second demister, the second demister is a third wire mesh demister 18 and a fourth wire mesh demister 19 which are fixedly arranged above the alkali liquor spray head, the third wire mesh demister 18 and the fourth wire mesh demister 19 are connected with each other to form a V shape, a connecting part of the third wire mesh demister 18 and the fourth wire mesh demister 19 is provided with a downward second partition plate, the second partition plate extends downwards into the alkali liquor storage tank 14, the right side of the second partition plate is a third flue gas channel 16, the third flue gas channel 16 is communicated with a flue gas outlet 20, and the flue gas outlet 20 is provided with a fifth wire mesh demister 21.

The top of aqua storage tank 7 is equipped with moisturizing

mouth

33, 7 lower parts of aqua storage tank are equipped with

waste water drain

37, 8 lower parts of oil washing tank are equipped with washing oil drain 38, alkali lye storage tank 14 lower part is equipped with

alkali lye drain

39, 7 top of aqua storage tank, 8 tops of washing oil tank and 14 tops of alkali lye storage tank all are equipped with level gauge 32, still be equipped with block terminal 31 on the frame 40, vertical clear water sprays pump 22, vertical washing oil and sprays pump 23, vertical alkali lye sprays pump 26 and level gauge 32 and all is connected with block terminal 31 electricity.

The platform 30 is further fixedly provided with a cooling tower 42 and a buffer tank 2, the oil washing tank 8 is internally provided with a rich oil regeneration tank 34, the rich oil regeneration tank 34 is communicated with the inside and the outside, the rich oil regeneration tank 34 is internally provided with an electric heating rod 35, the bottom of the rich oil regeneration tank 34 is connected with an oil discharge pipe 36, the oil discharge pipe 36 is connected with an inlet of the cooling tower 42, the oil discharge pipe 36 is provided with a circulating pump, and an outlet of the cooling tower 42 is communicated with the oil washing tank 8 outside the rich oil regeneration tank 34. And a gas discharge pipe 3 is connected between the top of the rich oil regeneration tank 34 and an inlet of the buffer tank 2, and an outlet of the buffer tank 2 is connected with a combustion fan of a mixing station for asphalt production.

After the washing oil is used for a period of time, the washing oil absorbs organic matters and becomes rich oil, when the washing oil absorbs light gas substances in smoke and reaches saturation, the electric heating rod 35 is started, the heating is stopped after the temperature reaches 100 ℃, the light gas substances enter the buffer tank 2 through the gas discharge pipe 3, the outlet of the buffer tank is connected with a combustion fan of a mixing station in asphalt production, and the combustion fan sends the light gas into a combustor to perform combustion treatment on the light gas so as to reduce the pollution of the light gas to the atmosphere.

Light components in the rich oil are removed to form lean oil, and the lean oil enters the cooling tower 42 through the circulating pump to be cooled and then returns to the oil washing tank 8 to be recycled, so that the operation cost of the device is reduced.

The working process of the utility model is as follows:

1. the flue gas is rotatory and carry out cyclone after getting into the mouth of cigarette, get up most smoke and dust enrichment, vertical clear water spray pump 22 takes out the water in the aqua storage tank 7, send to the clear water shower nozzle through clear water spray line 27, the clear water shower nozzle spouts the water smoke to the flue gas, wash away the smoke and dust in the flue gas, also cool down the flue gas simultaneously, get into first flue gas passageway 6 after entering into in wash oil spray tower 11 through the first through-hole 41 between wash oil spray tower 11 and the aqua storage tank 7, the mixture that the organic matter after the enrichment and the condensation is constituteed is arranged in aqua storage tank 7 through fluid-discharge tube 4.

2. After the flue gas enters the washing oil spray tower 11, the vertical washing oil spray pump 23 pumps out the washing oil in the washing oil tank 8, the washing oil is sent to the washing oil spray head through the washing oil spray pipeline 28, the washing oil is downwards sprayed to the flue gas flowing from bottom to top in the washing oil spray tower 11 to absorb organic matters in the flue gas, then the flue gas upwards removes liquid in the flue gas through the first wire mesh demister 12, enters the second flue gas channel 10 after passing through the second wire mesh demister 13, and enters the alkali liquor spray tower 17 after passing through the second through hole 43.

3. After the flue gas enters the alkali liquor spray tower 17, alkali liquor in the alkali liquor storage tank 14 is pumped out by the vertical alkali liquor spray pump 26, the alkali liquor is sent to an alkali liquor spray head through an alkali liquor spray pipeline 29, the alkali liquor is sprayed downwards to the flue gas flowing from bottom to top in the alkali liquor spray tower 17, other residual organic matters with peculiar smell in the flue gas are further absorbed, then the flue gas upwards removes liquid in the flue gas through the third wire mesh demister 18, the flue gas enters the third flue gas channel 16 after passing through the fourth wire mesh demister 19, the flue gas is discharged after passing through the fifth wire mesh demister 21 on the flue gas outlet 20 and the flue gas outlet 20, and the discharged flue gas can be further processed through combustion.

Example 2

As shown in fig. 4, the present embodiment is different from embodiment 1 in that:

an alkali liquor diluting tank 24 is fixedly arranged on the alkali liquor storage tank 14 outside the alkali liquor spraying tower 17, a stirrer is arranged in the alkali liquor diluting tank 24, the stirrer is an alkali liquor vertical stirrer 25, and a liquid discharge port at the lower part of the alkali liquor diluting tank 24 is communicated with the alkali liquor storage tank 14.

The alkali lye dilution tank 24 is used for preparing alkali lye, and after the alkali lye in the alkali lye storage tank 14 is used for a period of time, the absorption effect becomes poor, and the alkali lye is discharged through the alkali lye drain outlet 39, and then the alkali lye prepared in the alkali lye dilution tank 24 is put into the alkali lye storage tank 14, so that the working continuity of the device is ensured.

Example 3

As shown in fig. 5, the present embodiment is different from embodiment 2 in that:

a second packing layer 15 is fixedly arranged between the liquid level of the alkali liquor spray tower 17 and the alkali liquor spray head, and a first packing layer 9 is fixedly arranged between the liquid level of the washing oil spray tower 11 and the washing oil spray head. After the washing oil is sprayed on the first packing layer 9, the absorption area of the flue gas is increased, and the absorption effect and the purification efficiency are improved.

The above-mentioned embodiments are described in detail and specifically for the purpose of illustrating the technical ideas and features of the present invention, and it is an object of the present invention to enable those skilled in the art to understand the contents of the present invention and to implement the same, but not to limit the present invention only by the embodiments, and it is not limited to the scope of the present invention, i.e. equivalent changes or modifications made within the spirit of the present invention, and it is within the scope of the present invention for those skilled in the art to make local modifications within the system and changes or modifications between subsystems without departing from the structure of the present invention.

Claims

1. An integrated container type asphalt flue gas treatment device is characterized by comprising a water storage tank (7), a wash oil spray tower (11) and an alkali liquor spray tower (17) which are fixedly arranged in a frame (40) of a container in sequence; the water storage tank (7) is fixedly connected with the dedusting pretreatment tower (1), the outlet of the dedusting pretreatment tower (1) is communicated with the water storage tank (7), and the water storage tank (7) is provided with a first pump for conveying water in the water storage tank (7) into the dedusting pretreatment tower (1); the washing oil spray tower (11) is internally provided with a washing oil spray head at the upper part, and the washing oil spray tower (11) is provided with a second pump for conveying the washing oil stored in the washing oil spray tower (11) to the washing oil spray head; an alkali liquor spray head is arranged at the upper part in the alkali liquor spray tower (17), and a third pump for conveying alkali liquor in the alkali liquor storage tank (14) to the alkali liquor spray head is arranged on the alkali liquor spray tower (17); the water storage tank (7), the washing oil spray tower (11) and the alkali liquor spray tower (17) are communicated in sequence, the communicated positions are all above the liquid level, and a smoke outlet (20) is arranged on the alkali liquor spray tower (17).

2. The integrated container type asphalt flue gas treatment device according to claim 1, wherein a first demister is arranged on the washing oil spray tower (11), an outlet of the first demister is communicated with the alkali liquor spray tower (17), and an inlet of the first demister is positioned above a washing oil spray nozzle in the washing oil spray tower (11).

3. The integrated container type asphalt flue gas treatment device according to claim 2, wherein the first demister is a wire mesh demister fixedly arranged above an oil washing spray head in the oil washing spray tower (11), and the upper part of the wire mesh demister is communicated with the alkali liquor spray tower (17).

4. The integrated container type asphalt flue gas treatment device according to claim 1, wherein a second demister is arranged on the alkali liquor spray tower (17), an outlet of the second demister is communicated with the smoke outlet (20), and an inlet of the second demister is positioned above an alkali liquor spray head in the alkali liquor spray tower (17).

5. The integrated container type asphalt flue gas treatment device according to claim 1, further comprising a cooling tower (42) and a buffer tank (2); an oil washing tank (8) is arranged at the bottom of the oil washing spray tower (11), a rich oil regeneration tank (34) is arranged in the oil washing tank (8), the rich oil regeneration tank (34) is communicated with the inside and the outside, an electric heating rod (35) is arranged in the rich oil regeneration tank (34), an oil discharge pipe (36) is connected to the bottom of the rich oil regeneration tank (34), the oil discharge pipe (36) is connected with an inlet of a cooling tower (42), a circulating pump is arranged on the oil discharge pipe (36), and an outlet of the cooling tower (42) is communicated with the oil washing tank (8) outside the rich oil regeneration tank (34); and a gas discharge pipe (3) is connected between the top of the rich oil regeneration tank (34) and an inlet of the buffer tank (2), and an outlet of the buffer tank (2) is connected with a combustion fan of a mixing station for asphalt production.

6. The integrated container type asphalt flue gas treatment device according to claim 1, wherein an alkali liquor dilution tank (24) is fixedly arranged outside the alkali liquor spray tower (17), a stirrer is arranged in the alkali liquor dilution tank (24), and a liquid outlet of the alkali liquor dilution tank (24) is communicated with the bottom of the alkali liquor spray tower (17).

7. The integrated container type asphalt flue gas treatment device according to claim 1, wherein a first filler layer (9) is fixedly arranged between the liquid level of the wash oil spray tower (11) and the wash oil spray head.

8. The integrated container type asphalt flue gas treatment device according to claim 1, wherein a second filler layer (15) is fixedly arranged between the liquid level of the alkali liquor spray tower (17) and the alkali liquor spray head.