CN214715597U

CN214715597U - Asphalt flue gas treatment system of asphalt mixing plant

Info

Publication number: CN214715597U
Application number: CN202120491630.9U
Authority: CN
Inventors: 房晓博; 张海滨; 房静怡; 李江旬; 房保恒
Original assignee: Nanyang Jinyun Machinery Manufacturing Co ltd
Current assignee: Nanyang Jinyun Machinery Manufacturing Co ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-11-16
Anticipated expiration: 2031-03-08

Abstract

The utility model belongs to the technical field of asphalt waste gas treatment, in particular to an asphalt flue gas treatment system of an asphalt mixing plant, which comprises an alkaline washing tower, a layering tank, an oxidation tank, a pipeline multi-way and an ozone preparation cabinet, wherein a circulating pump is arranged between the alkaline washing tower and an alkaline solution preparation tank, the alkaline solution preparation tank is connected with the layering tank through a return pipe, an alkaline solution recovery pump is arranged on the return pipe, the layering tank is connected with a waste liquid tank through a waste liquid pipe, a waste liquid pump is arranged on the waste liquid pipe, a first floating ball liquid level switch, a second floating ball liquid level switch and a third floating ball liquid level switch are arranged on the inner wall of the layering tank from top to bottom, an oil-water separation sensor and an energy dissipation plate are arranged in the layering tank, the alkaline washing tower is connected with the layering tank through a blanking pipe, an exhaust pipe of the alkaline washing tower is communicated with the oxidation tank through a pipeline multi-way and is connected with an ozone preparation cabinet, after the interface lower limit of the oil phase reaches the probe height of the oil-water separation sensor, the waste liquid pump can be started to make the oil phase and a small amount of the alkali solution be sent to the waste liquid tank to be temporarily stored and collected in the waste liquid tank, realizing the automatic separation of oil phase impurities and alkali liquor.

Description

Asphalt flue gas treatment system of asphalt mixing plant

Technical Field

The utility model belongs to the technical field of pitch exhaust-gas treatment, concretely relates to asphalt mixing plant pitch flue gas processing system.

Background

The alkaline washing tower is a common device for treating asphalt waste gas and flue gas in a laboratory, and the principle of the alkaline washing tower is that the asphalt waste gas and flue gas are subjected to neutralization reaction with a sodium hydroxide solution or spray liquid, so that the asphalt waste gas and flue gas are treated, but the single treatment of the asphalt waste gas and flue gas by using the alkaline washing tower cannot achieve satisfactory effect; in addition, in the flue gas treatment process of alkaline washing spraying, oil phase impurities contained in the flue gas can be attached to the surface of atomized granular alkaline liquor liquid beads and are deposited in the alkaline liquor and enter the alkaline washing tower along with the circulation of an alkaline liquor pipeline, the spraying effect of the alkaline liquor is greatly reduced, the oil phase impurities are high in viscosity and easy to attach to the inner wall of the alkaline washing tower and the inner wall of the pipeline, and the pipeline and the pump body are blocked and damaged after a long time.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides an asphalt mixing plant pitch flue gas processing system, the high back waste liquid pump of probe that reaches oil-water separation sensor can start to make oil phase and a small amount of alkali lye send to the waste liquid pond and keep in the collection, realizes the autosegregation of oil phase impurity and alkali lye the interface lower limit of oil phase.

In order to achieve the above object, the utility model provides a following technical scheme: an asphalt flue gas treatment system of an asphalt mixing plant comprises an alkaline washing tower, a layering tank, an oxidation tank, a pipeline multi-way and an ozone preparation cabinet, wherein a water inlet pipe of the alkaline washing tower is fixedly connected with a water outlet end of a circulating pump, a water inlet end of the circulating pump is fixedly connected with a water outlet pipe at the bottom of an alkali liquor preparation tank, the top side of the alkali liquor preparation tank is communicated with the bottom side of the layering tank through a return pipe, an alkali liquor recovery pump is fixedly installed on the return pipe, the bottom side of the layering tank is communicated with the top side of the waste liquid tank through a waste liquid pipe, a waste liquid pump is fixedly installed on the waste liquid pipe, the alkali liquor recovery pump and the waste liquid pump are electrically connected with a PLC control cabinet, a first liquid level switch, a second floating ball liquid level switch and a third floating ball liquid level switch are installed on the inner wall of the layering tank from top to bottom, an oil-water separation sensor is fixedly installed on one side inside the layering tank, and an energy dissipation plate is fixedly installed on the other side inside the layering tank, the device comprises an alkaline washing tower, a layering tank, an oxidation tank, a feeding pipe, an exhaust pipe, an ozone preparation cabinet, a cooling water pipe, a quartz tube ozone generator and an air inlet pipe, wherein the feeding pipe fixedly connected with the bottom side of the alkaline washing tower is communicated with the top side of the layering tank, the exhaust pipe of the alkaline washing tower is communicated with the top of the oxidation tank, the side surface of the oxidation tank is fixedly connected with the ozone preparation cabinet through a pipeline in a multi-way mode, and the ozone preparation cabinet comprises a shell, a cooling water pipe, a quartz tube ozone generator and an air inlet pipe.

Preferably, the side surface of the energy dissipation plate is fixedly connected with the inner wall of the layering pool, the top end of the energy dissipation plate is fixedly connected with the inner top surface of the layering pool, the vertical distance between the bottom end of the energy dissipation plate and the inner bottom surface of the layering pool is 10-20 cm, and the energy dissipation plate is fixedly installed on one side of the layering pool close to the discharging pipe; the energy dissipation plate can block water flow impact of the blanking pipe, and plays an energy dissipation role, so that oil and water in the layering tank can better stand and layer.

Preferably, the first floating ball liquid level switch and the second floating ball liquid level switch are electrically connected with the PLC control cabinet; when liquid level rose to floater level switch department in the layering pond, floater level switch sent the signal of telecommunication to the PLC switch board and changed, and PLC switch board control alkali lye recovery pump operation makes alkali lye retrieve to alkali lye preparation jar in-circulation use, and the liquid level drops to alkali lye recovery pump stall when floater level switch two departments to realize automatic beating material when making alkali lye layering in the layering pond, reduced personnel's amount of labour.

Preferably, the oil-water separation sensor is electrically connected with the PLC control cabinet, and the height of a probe of the oil-water separation sensor is not higher than the height of the bottom end of the floating ball when the floating ball liquid level switch II is in a normally open state and is not lower than the height of the top end of the floating ball when the floating ball liquid level switch II is in a normally open state; the alkali liquor recovery pump is repeatedly started and stopped to discharge alkali liquor deposited below the oil phase in a layered mode into the alkali liquor preparation tank through the return pipe, the volume of the oil phase in the layered tank is continuously increased in an accumulated mode until the lower limit of the interface of the oil phase, namely the oil-water separation interface reaches the height of a probe of the oil-water separation sensor, the PLC control cabinet controls the alkali liquor recovery pump to stop rotating and the waste liquor pump to be started, the oil phase and a small amount of alkali liquor are conveyed to the waste liquor tank through the waste liquor pipe to be temporarily stored and collected, and automatic separation of oil phase impurities and the alkali liquor is achieved.

Preferably, when the floating ball liquid level switch III is in a normally open state, the height of the liquid level in the layering tank is not lower than the height of the top end of a connecting port between the waste liquid pipe and the layering tank; when the liquid level is reduced to the normal close amount of the floating ball liquid level switch III, the PLC control cabinet can control the waste liquid pump to stop rotating, and the phenomenon that the waste liquid pump idles when air enters the waste liquid pipe is avoided.

Preferably, the number of the quartz tube ozone generators is multiple, the quartz tube ozone generators are vertically and fixedly installed inside the outer shell, the bottom sides of the quartz tube ozone generators are communicated with the inside of the oxidation tank through pipelines, the top sides of the quartz tube ozone generators are fixedly connected with a compressed air system pipeline or an oxygen machine through an air inlet pipe, and a water outlet at the top end and a water inlet at the bottom end of each quartz tube ozone generator are connected with a cooling water system pipeline through cooling water pipes; the quartz tube ozone generator has stable work, long service life and large ozone output, the generated ozone can enter the oxidation tank through the pipeline in a multi-way manner and is mixed with the gas subjected to primary purification by the alkaline washing tower to be subjected to oxidation reduction treatment, and the treatment effect of the device on asphalt smoke is greatly improved.

Preferably, a plurality of first range-extending baffles and second range-extending baffles are arranged on the inner wall of the oxidation tank in an up-down staggered and equal sequence, the first range-extending baffles and the second range-extending baffles are of square plate structures, the front end faces and the rear end faces of the first range-extending baffles are fixedly connected with the inner wall of the oxidation tank, the vertical distance between the right end face of the first range-extending baffle and the right inner wall of the oxidation tank is 1-5 cm, and the vertical distance between the left end face of the second range-extending baffle and the left inner wall of the oxidation tank is 1-5 cm; the first range-extending baffle and the second range-extending baffle which are arranged in a staggered mode can prolong the mixing time of the flue gas and the ozone in the oxidation tank, and therefore the treatment effect of oxidation reduction is improved.

Compared with the prior art, the beneficial effects of the utility model are that: the energy dissipation plate can block water flow impact of the blanking pipe, so that the energy dissipation effect is achieved, and oil and water in the layering tank can better stand and layer; when the liquid level in the layering tank rises to the first position of the floating ball liquid level switch, the electric signal sent to the PLC control cabinet by the first floating ball liquid level switch is changed, the PLC control cabinet controls the alkali liquor recovery pump to operate so that the alkali liquor is recovered to the alkali liquor preparation tank for recycling, and when the liquid level falls to the second position of the floating ball liquid level switch, the alkali liquor recovery pump stops rotating, so that the alkali liquor is layered in the layering tank, automatic material pouring is realized, and the labor capacity of personnel is reduced; repeatedly starting and stopping the alkali liquor recovery pump to discharge alkali liquor layered and deposited below the oil phase into the alkali liquor preparation tank through the return pipe, so that the volume of the oil phase in the layering tank is continuously accumulated and increased until the lower limit of the interface of the oil phase, namely the oil-water separation interface reaches the height of a probe of the oil-water separation sensor, the PLC control cabinet controls the alkali liquor recovery pump to stop rotating and the waste liquor pump to start, so that the oil phase and a small amount of alkali liquor are conveyed into the waste liquor tank through the waste liquor pipe to be temporarily stored and collected, and the automatic separation of oil phase impurities and the alkali liquor is realized; when the liquid level is reduced to the normal close value of the floating ball liquid level switch III, the PLC control cabinet can control the waste liquid pump to stop rotating, so that the waste liquid pump is prevented from idling due to the fact that air enters the waste liquid pipe; the quartz tube ozone generator has stable work, long service life and high ozone yield, the generated ozone can enter the oxidation tank through a plurality of pipelines and is mixed with the gas subjected to primary purification by the alkaline washing tower for oxidation-reduction treatment, and the treatment effect of the device on the asphalt smoke is greatly improved; the first range-extending baffle and the second range-extending baffle which are arranged in a staggered mode can prolong the mixing time of the flue gas and the ozone in the oxidation tank, and therefore the treatment effect of oxidation reduction is improved.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of a PLC control cabinet of the present invention;

FIG. 3 is a longitudinal sectional view of the oxidation tank of the present invention;

FIG. 4 is a longitudinal sectional view of the ozone preparation cabinet of the present invention;

FIG. 5 is a first operation state diagram of the stratified pool of the present invention;

FIG. 6 is a second operation state diagram of the stratified pool in the present invention;

FIG. 7 is a third diagram of the operation state of the stratified pool in the present invention;

FIG. 8 is a diagram of the operation state of the layering tank in the present invention;

in the figure: 1. an alkali liquor preparation tank; 2. a circulation pump; 3. an alkaline washing tower; 301. a discharging pipe; 4. an alkali liquor recovery pump; 5. a waste liquid pump; 6. a layering tank; 601. a first floating ball liquid level switch; 602. a floating ball liquid level switch II; 603. a floating ball liquid level switch III; 604. an oil-water separation sensor; 605. an energy dissipation plate; 606. a return pipe; 607. a waste liquid pipe; 7. a waste liquid tank; 8. an oxidation tank; 801. a first range-extending baffle; 802. a second range-extending baffle; 9. the pipelines are multi-ported; 10. an ozone preparation cabinet; 1001. an outer housing; 1002. a cooling water pipe; 1003. a quartz tube ozone generator; 1004. an air inlet pipe; 11. PLC switch board.

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 work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-8, the present invention provides the following technical solutions: an asphalt flue gas treatment system of an asphalt mixing plant comprises an alkaline washing tower 3, a layering tank 6, an oxidation tank 8, a pipeline multi-way 9 and an ozone preparation cabinet 10, wherein a water inlet pipe of the alkaline washing tower 3 is fixedly connected with a water outlet end of a circulating pump 2, a water inlet end of the circulating pump 2 is fixedly connected with a water outlet pipe at the bottom of an alkaline solution preparation tank 1, the top side of the alkaline solution preparation tank 1 is communicated and connected with the bottom side of the layering tank 6 through a return pipe 606, an alkaline solution recovery pump 4 is fixedly installed on the return pipe 606, the bottom side of the layering tank 6 is communicated and connected with the top side of a waste liquid tank 7 through a waste liquid pipe 607, a waste liquid pump 5 is fixedly installed on the waste liquid pipe 607, the alkaline solution recovery pump 4 and the waste liquid pump 5 are electrically connected with a PLC control cabinet 11, a floating ball liquid level switch I601, a floating ball liquid level switch II 602 and a floating ball liquid level switch III 603 are installed on the inner wall of the layering tank 6 from top to bottom, an oil-water separation sensor 604 is fixedly installed on one side in the interior of the layering tank 6, the energy dissipation plate 605 is fixedly mounted on the other side inside the layering tank 6, a blanking pipe 301 fixedly connected to the bottom side of the alkaline washing tower 3 is communicated with the top side of the layering tank 6, an exhaust pipe of the alkaline washing tower 3 is communicated with the top of an oxidation tank 8, the side surface of the oxidation tank 8 is fixedly connected with an ozone preparation cabinet 10 through a multi-way pipe 9, and the ozone preparation cabinet 10 comprises an outer shell 1001, a cooling water pipe 1002, a quartz tube ozone generator 1003 and an air inlet pipe 1004.

Specifically, the side surface of the energy dissipation plate 605 is fixedly connected with the inner wall of the layering pool 6, the top end of the energy dissipation plate 605 is fixedly connected with the inner top surface of the layering pool 6, the vertical distance between the bottom end of the energy dissipation plate 605 and the inner bottom surface of the layering pool 6 is 10-20 cm, and the energy dissipation plate 605 is fixedly installed on one side of the layering pool 6 close to the blanking pipe 301; the energy dissipation plate 605 can block water flow impact of the blanking pipe 301, so that the energy dissipation effect is achieved, and oil and water in the layering tank 6 can better stand and layer.

Specifically, the first float level switch 601 and the second float level switch 602 are electrically connected to the PLC control cabinet 11; when the liquid level rose to floater level switch 601 department in the layering pond 6, floater level switch 601 sent to the change of the signal of telecommunication of PLC switch board 11, and PLC switch board 11 control alkali lye recovery pump 4 operation makes alkali lye retrieve 1 middle cycle use to alkali lye preparation jar, and alkali lye recovery pump 4 stall when the liquid level dropped to floater level switch two 602 departments to realize automatic the material beating when making alkali lye layering in layering pond 6, reduced personnel's amount of labour.

Specifically, the oil-water separation sensor 604 is electrically connected with the PLC control cabinet 11, and the height of the probe of the oil-water separation sensor 604 is not higher than the height of the bottom end of the floating ball when the floating ball liquid level switch two 602 is normally open, and is not lower than the height of the top end of the floating ball when the floating ball liquid level switch two 602 is normally open; the alkali liquor recovery pump 4 is repeatedly started and stopped to discharge the alkali liquor layered and deposited below the oil phase into the alkali liquor preparation tank 1 through the return pipe 606, so that the volume of the oil phase in the layered tank 6 is continuously accumulated and increased until the lower limit of the interface of the oil phase, namely the oil-water separation interface reaches the height of the probe of the oil-water separation sensor 604, the PLC control cabinet 11 controls the alkali liquor recovery pump 4 to stop rotating and the waste liquor pump 5 to start, so that the oil phase and a small amount of alkali liquor are sent to the waste liquor tank 7 through the waste liquor pipe 607 to be temporarily stored and collected, and the automatic separation of oil phase impurities and the alkali liquor is realized.

Specifically, when the floating ball liquid level switch III 603 is normally open, the height of the liquid level in the layering tank 6 is not lower than the height of the top end of a connecting port between the waste liquid pipe 607 and the layering tank 6; when the liquid level is reduced to the normal close value of the floating ball liquid level switch III 603, the PLC control cabinet 11 can control the waste liquid pump 5 to stop rotating, and the phenomenon that the air enters the waste liquid pipe 607 to cause the waste liquid pump 5 to idle is avoided.

Specifically, a plurality of quartz tube ozone generators 1003 are vertically and fixedly installed inside the outer shell 1001, the bottom sides of the quartz tube ozone generators 1003 are connected with the inside of the oxidation tank 8 through a pipeline multi-way 9, the top sides of the quartz tube ozone generators 1003 are fixedly connected with a compressed air system pipeline or an oxygen machine through an air inlet pipe 1004, and water outlets at the top ends and water inlets at the bottom ends of the quartz tube ozone generators 1003 are connected with a cooling water system pipeline through a cooling water pipe 1002; quartz tube ozone generator 1003 job stabilization, long service life, ozone output is big, and the ozone accessible pipeline of production leads to 9 and gets into the inside of oxidation jar 8, carries out the redox with the gas mixture after alkaline tower 3 carries out the first purification and handles, improves the treatment effect of this device to the pitch flue gas greatly.

Specifically, a plurality of first stroke-increasing baffles 801 and second stroke-increasing baffles 802 are vertically staggered and arranged on the inner wall of the oxidation tank 8 in an equal sequence, the first stroke-increasing baffles 801 and the second stroke-increasing baffles 802 are both square plate structures with front and rear end faces fixedly connected with the inner wall of the oxidation tank 8, the vertical distance between the right end face of the first stroke-increasing baffles 801 and the right inner wall of the oxidation tank 8 is 1-5 cm, and the vertical distance between the left end face of the second stroke-increasing baffles 802 and the left inner wall of the oxidation tank 8 is 1-5 cm; the staggered first range-extending baffles 801 and the second range-extending baffles 802 can prolong the mixing time of the flue gas and the ozone in the oxidation tank 8, so that the treatment effect of oxidation reduction is improved.

The working principle and the using process of the invention are as follows: the alkali liquor in the alkali liquor preparation tank 1 is sent to an alkali washing tower 3 through a circulating pump 2 for alkali washing treatment, oil phase substances adsorbed in water mist alkali liquor are deposited at the bottom of the alkali washing tower 3 along with the alkali liquor in the process of alkali liquor spraying treatment of flue gas in the alkali washing tower 3, enter a layering tank 6 through a discharging pipe 301 and are subjected to energy dissipation through an energy dissipation plate 605, oil-containing alkali liquor entering the layering tank 6 is subjected to standing layering in the layering tank 6, and the oil phase with lower density floats above the alkali liquor with higher density; when the liquid level in the layering tank 6 rises to the first floater liquid level switch 601, so that an electric signal of the first floater liquid level switch 601 is converted into a normally closed quantity, the PLC control cabinet 11 controls the alkali liquor recovery pump 4 to operate, so that the alkali liquor at the lower layer is recovered into the alkali liquor preparation tank 1 for recycling, when the liquid level falls to the second floater liquid level switch 602, so that an electric signal of the first floater liquid level switch 601 is converted into a normally open quantity, the alkali liquor recovery pump 4 stops rotating, the liquid level of the alkali liquor in the layering tank 6 continues rising until the liquid level reaches the first floater liquid level switch 601, and the steps are repeated; after the alkali liquor recovery pump 4 is repeatedly started and stopped, the volume of an oil phase layered and deposited above the alkali liquor is continuously accumulated and increased, in the process of material pumping of the alkali liquor recovery pump 4, when the lower limit of the interface of the oil phase, namely the height of an oil-water separation interface reaches the height of a probe of an oil-water separation sensor 604 in the process of descending, the PLC control cabinet 11 controls the alkali liquor recovery pump 4 to stop rotating and the waste liquid pump 5 to start, so that the oil phase and a small amount of alkali liquor are sent to a waste liquid tank 7 through a waste liquid pipe 607 to be temporarily stored and collected, the automatic separation of oil phase impurities and the alkali liquor is realized, when the liquid level height is reduced to the position of a floating ball liquid level switch III 603, so that the floating ball liquid level switch III 603 is converted into a normally open amount, the waste liquid pump 5 stops rotating, and the layering tank 6 continues to collect the alkali liquor;

after entering the oxidation tank 8, the flue gas subjected to primary treatment by the alkaline tower 3 is mixed and reacted with ozone generated by the operation of a quartz tube ozone generator 1003 entering the oxidation tank 8 through a pipeline multi-way 9, subjected to secondary treatment and discharged to the outside.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an asphalt mixing plant pitch flue gas processing system which characterized in that: including alkaline tower (3), layering pond (6), oxidation tank (8), pipeline lead to (9), ozone preparation cabinet (10) more, the outlet end of inlet tube fixed connection circulating pump (2) of alkaline tower (3), the outlet pipe of jar (1) bottom is joined in marriage to the end fixed connection alkali lye of circulating pump (2), the bottom side of jar (1) is joined in marriage to alkali lye is passed through back flow (606) through connection layering pond (6) on the top side of jar (1), just fixed mounting has alkali lye recovery pump (4) on back flow (606), the top side of waste liquid pond (7) is through connection through waste liquid pipe (607) on the bottom side of layering pond (6), just fixed mounting has waste liquid pump (5) on waste liquid pipe (607), alkali lye recovery pump (4), waste liquid pump (5) electric connection PLC switch board (11), floater liquid level switch (601) are installed from top to bottom to the inner wall of layering pond (6), Floater level switch two (602), floater level switch three (603), one side fixed mounting of layering pond (6) inside has oil water separating sensor (604), the inside opposite side fixed mounting of layering pond (6) has energy dissipation board (605), wash alkaline tower (3) bottom side fixed connection's unloading pipe (301) link up the top side of connecting layering pond (6), the blast pipe link up the top of connecting oxidation tank (8) of wash alkaline tower (3), the side of oxidation tank (8) is led to (9) fixed connection ozone preparation cabinet (10) through the pipeline, ozone preparation cabinet (10) are including shell body (1001), cooling water pipe (1002), quartz tube ozone generator (1003), intake pipe (1004).

2. The asphalt flue gas treatment system for the asphalt mixing plant according to claim 1, wherein: the side surface of the energy dissipation plate (605) is fixedly connected with the inner wall of the layering pool (6), the top end of the energy dissipation plate (605) is fixedly connected with the inner top surface of the layering pool (6), the vertical distance between the bottom end of the energy dissipation plate (605) and the inner bottom surface of the layering pool (6) is 10-20 cm, and the energy dissipation plate (605) is fixedly installed on one side of the layering pool (6) close to the blanking pipe (301).

3. The asphalt flue gas treatment system for the asphalt mixing plant according to claim 1, wherein: the first floating ball liquid level switch (601) and the second floating ball liquid level switch (602) are electrically connected with the PLC control cabinet (11).

4. The asphalt flue gas treatment system for the asphalt mixing plant according to claim 1, wherein: the oil-water separation sensor (604) is electrically connected with the PLC control cabinet (11), and the height of a probe of the oil-water separation sensor (604) is not higher than the height of the bottom end of the floating ball when the floating ball liquid level switch II (602) is in a normally open state, and is not lower than the height of the top end of the floating ball when the floating ball liquid level switch II (602) is in a normally closed state.

5. The asphalt flue gas treatment system for the asphalt mixing plant according to claim 1, wherein: when the floating ball liquid level switch III (603) is in a normally open state, the height of the liquid level in the layering tank (6) is not lower than the height of the top end of a connecting port between the waste liquid pipe (607) and the layering tank (6).

6. The asphalt flue gas treatment system for the asphalt mixing plant according to claim 1, wherein: the ozone generator is characterized in that the number of the quartz tube ozone generators (1003) is multiple, the quartz tube ozone generators are vertically and fixedly installed inside the outer shell (1001), the bottom sides of the quartz tube ozone generators (1003) are communicated with the inside of the oxidation tank (8) through a pipeline multi-way pipe (9), the top sides of the quartz tube ozone generators (1003) are fixedly connected with a compressed air system pipeline or an oxygen machine through an air inlet pipe (1004), and a water outlet at the top end of each quartz tube ozone generator (1003) and a water inlet at the bottom end of each quartz tube ozone generator (1003) are connected with a cooling water system pipeline through a cooling water pipe (1002).

7. The asphalt flue gas treatment system for the asphalt mixing plant according to claim 1, wherein: a plurality of journey baffle of increasing (801) and journey baffle two (802) of increasing are installed to crisscross preface about the inner wall of oxidation jar (8), the square plate structure of the inner wall fixed connection of terminal surface and oxidation jar (8) around increasing journey baffle one (801), increasing journey baffle two (802) is, the vertical distance between the right-hand member face of journey baffle one (801) and the right inner wall of oxidation jar (8) is 1-5 cm, the vertical distance between the left end face of the journey baffle two (802) and the left inner wall of oxidation jar (8) is 1-5 cm.