Asphalt fume treatment system

Abstract

The invention discloses an asphalt flue gas treatment system, comprising a low-asphalt flue gas recovery pipeline, wherein the output end of the asphalt flue gas recovery pipeline is connected to a refrigerator, the output end of the refrigerator is connected to a water film ionization device, the output end of the water film ionization device is connected to an ionization capture module, and the output end of the ionization capture module is connected to an activated carbon adsorption module. The asphalt flue gas treatment system of the invention uses a refrigerator to quickly reduce the temperature in the asphalt flue gas recovery pipeline, so that the water and oil inside are quickly condensed, thereby improving the front-end volatile matter treatment efficiency and treatment effect, and uses the water film ionization device to perform multiple captures of filters, water films and charges, and further processes tiny volatiles. Moreover, due to the rapid condensation of water vapor in the flue gas and the short contact time between the rear end and the water film, the water content of the flue gas is greatly reduced, which can avoid the subsequent activated carbon deactivation, and achieve an ultra-low emission of organic volatiles at the exhaust end to protect the environment.

Description

Technical Field

[0001] The present invention specifically relates to an asphalt fume treatment system, and belongs to the technical field of asphalt fume treatment. Background Art

[0002] Asphalt fume is the aerosol and vapor produced by the heating of asphalt and the combustion of asphalt-containing substances; the volatiles in asphalt fume are emitted into the atmosphere and become one of the air pollutants; the components of asphalt fume are extremely complex and vary with the source of asphalt; asphalt fume contains both solid and liquid particles condensed from the volatile components of asphalt, and organic matter in vapor state. The sources of asphalt fume emission are very wide, such as industrial thermal processing processes such as coking and oil refining that produce asphalt; the process of heating asphalt to produce asphalt products; the process of heating asphalt for paving roads, repairing houses or making anti-corrosion coatings; the process of heating or burning asphalt products, petroleum, bituminous coal, wood, oil shale containing asphalt, etc.; in order to reduce the emission of volatiles in asphalt fume into the atmosphere, existing processing manufacturers usually need to treat the fume, and the existing treatment methods usually use secondary water washing spray, cooling and water washing. When the secondary water is used for a long time, the water is difficult to handle, the temperature gradually increases, and the effect cannot be achieved; the recycled water is prone to clogging the water spray port when the amount of oil is large. Summary of the invention

[0003] In order to solve the above problems, the present invention proposes an asphalt flue gas treatment system, which can deeply treat the flue gas and reduce the water content of the flue gas, thereby avoiding the subsequent deactivation of activated carbon and achieving ultra-low emissions of organic volatiles at the exhaust end to protect the environment.

[0004] The asphalt flue gas treatment system of the present invention includes a low-asphalt flue gas recovery pipeline, the output end of the asphalt flue gas recovery pipeline is connected to a refrigerator, the output end of the refrigerator is connected to a water film ionization device, the output end of the water film ionization device is connected to an ionization capture module, the output end of the ionization capture module is connected to an activated carbon adsorption module, and the output end of the activated carbon adsorption module is the purified exhaust gas discharge end.

[0005] Furthermore, the refrigerator includes a refrigerator body, a U-shaped refrigeration bin is arranged inside the refrigerator body; a refrigeration pipeline is arranged outside the U-shaped refrigeration bin; the bottom of the U-shaped refrigeration bin is connected to a condensation waste liquid tank through a double valve body; one end of the U-shaped refrigeration bin is connected to an asphalt tail gas recovery pipeline; the other end of the U-shaped refrigeration bin is connected to a condensation flue gas exhaust pipe;

[0006] The water film ionization device comprises an outer closed cover; the two ends of the outer closed cover are fixed by flange cover plates; a square tube bin is fixed between the flange cover plates by sealing rings; the square tube bin comprises an input section, an intermediate section and an output section; a high-voltage direct current positive electrode electric field component is arranged between the input section and the intermediate section; a high-voltage direct current negative electrode electric field component is arranged between the intermediate section and the output section;

[0007] The high-voltage direct current positive pole electric field component and the high-voltage direct current negative pole electric field component include an L-shaped warehouse seat; the square tube warehouse passes through the L-shaped warehouse seat, and the penetration is sealed, and a filter body is arranged at the bottom of the L-shaped warehouse seat; a pressure pump and an automatic water replenishment valve are arranged at the end of the L-shaped warehouse seat; a drain valve is arranged above the filter body of the L-shaped warehouse seat; a conductive fine mesh cloth sleeve is arranged on the L-shaped warehouse seat; the inner two sides of the conductive fine mesh cloth sleeve are sleeved on the winding roller; the upper and lower winding rollers are connected by belts and connected to the drive motor through transmission parts; a water film pair of rollers is arranged above the square tube warehouse on the conductive fine mesh cloth sleeve; the water film pair of rollers clamps the conductive fine mesh cloth sleeve; an atomizing power connection warehouse is arranged above the conductive fine mesh cloth sleeve; an atomizing nozzle is arranged on the atomizing power connection warehouse; the atomizing nozzle is connected to the pressure pump; the electrodes inside the two atomizing power connection warehouses are respectively connected to the two ends of the high-voltage direct current equipment outside the outer closed cover.

[0008] Furthermore, an ultrasonic cleaner is arranged inside the L-shaped seat of the high-voltage direct current negative pole electric field component; and a follower roller brush is arranged at the bottom of the conductive fine mesh cloth sleeve.

[0009] Furthermore, the asphalt fume recovery pipeline collects the asphalt fume and sends it to the refrigeration body, and the refrigeration pipeline of the refrigeration body circulates refrigeration for the U-shaped refrigeration bin; when the asphalt fume enters the U-shaped refrigeration bin, it is quickly cooled, and the water vapor is quickly condensed to form condensed water droplets, which enter the bottom of the U-shaped refrigeration bin with some particulate matter under the action of gravity; the asphalt-containing wastewater is discharged to the condensation waste liquid tank through the cross-opening and closing of the double valve bodies; at least one of the double valve bodies is closed to ensure that the entire U-shaped refrigeration bin is in a closed state, and when the asphalt fume is condensed, it enters the water film ionization equipment, and the two modules of the high-voltage direct current positive electric field component and the high-voltage direct current negative electric field component of the water film ionization equipment are in an independent and separated state. When working, water is pumped onto the atomizing nozzle through a pressure pump, and the atomizing bin is filled with atomizing liquid. At the same time, the driving motor drives the winding roller to rotate rapidly through the transmission part and the belt, and a layer of water film is applied to the mesh of the conductive fine mesh cloth cover by the water film roller; and the two conductive fine mesh cloth covers are connected by high-voltage direct current. The equipment forms an entire surface of electrode plates; since the asphalt flue gas is condensed in sequence, most of the steam and liquefied impurities, as well as some impurities covered by droplets, are removed; the asphalt tail gas entering the water film ionization equipment contains most of the non-condensable gases and a small part of impurities; when entering the water film ionization equipment, it is necessary to break through the water film and quickly complete the water washing. At this time, the remaining large particles of impurities directly go down with the conductive fine mesh cloth sleeve and leave the flue gas, and the small particles of impurities pass through the water film and are attached with an electric charge, and move forward and contact another conductive fine mesh cloth sleeve. The charged small particles of impurities are adsorbed by the conductive fine mesh cloth sleeve and go down with the conductive fine mesh cloth sleeve. The small particles of impurities are captured by the conductive fine mesh cloth sleeve, the water film and the electric charge, and the flue gas completes secondary treatment. The flue gas contacts the water film for a short time, and the water content of the asphalt flue gas is low; the tail gas treated by the water film ionization equipment is sequentially ionized and captured by the ionization capture module and the impurities of the non-condensable gas are adsorbed by the activated carbon adsorption module, and finally the tail gas is discharged.

[0010] Compared with the prior art, the asphalt flue gas treatment system of the present invention uses a refrigerator to quickly reduce the temperature in the asphalt flue gas recovery pipeline, so that the water and oil inside are quickly condensed, thereby improving the front-end volatile matter treatment efficiency and treatment effect, and uses a water film ionization device to perform multiple captures of filters, water films and charges to further treat tiny volatiles. In addition, due to the rapid condensation of water vapor in the flue gas and the short contact time between the rear end and the water film, the water content of the flue gas is greatly reduced, which can avoid the subsequent deactivation of activated carbon, and achieve ultra-low emissions of organic volatiles at the exhaust end to protect the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present invention.

[0012] Figure 2 This is a schematic diagram of the connection structure of the refrigerator in Example 1 of the present invention.

[0013] Figure 3 This is a schematic structural diagram of the water film ionization device of Example 1 of the present invention. DETAILED DESCRIPTION

[0014] Embodiment 1:

[0015] like Figures 1 to 3 The asphalt flue gas treatment system shown includes a low-asphalt flue gas recovery pipeline, the output end of the asphalt flue gas recovery pipeline is connected to a refrigerator, the output end of the refrigerator is connected to a water film ionization device, the output end of the water film ionization device is connected to an ionization capture module, the output end of the ionization capture module is connected to an activated carbon adsorption module, and the output end of the activated carbon adsorption module is the purified exhaust gas discharge end.

[0016] The refrigerator comprises a refrigerator body 1, a U-shaped refrigeration bin 2 is arranged inside the refrigerator body 1; a refrigeration pipeline 3 is arranged outside the U-shaped refrigeration bin of the refrigerator body 1; the bottom of the U-shaped refrigeration bin 2 is connected to a condensation waste liquid tank 5 through a double valve body 4; one end of the U-shaped refrigeration bin 2 is connected to an asphalt tail gas recovery pipeline; the other end of the U-shaped refrigeration bin 2 is connected to a condensation flue gas external exhaust pipe;

[0017] The water film ionization device comprises an outer sealing cover 6; both ends of the outer sealing cover 6 are fixed by flange cover plates 7; a square tube bin 8 is fixed between the flange cover plates 6 by a sealing ring; the square tube bin 8 comprises an input section 81, an intermediate section 82 and an output section 83; a high-voltage direct current positive electric field component is arranged between the input section 81 and the intermediate section 82; a high-voltage direct current negative electric field component is arranged between the intermediate section 82 and the output section 83;

[0018] The high-voltage direct current positive pole electric field assembly and the high-voltage direct current negative pole electric field assembly include an L-shaped bin seat 9; the square tube bin 8 passes through the L-shaped bin seat 9, and the penetration is sealed, and a filter body 10 is arranged at the bottom of the L-shaped bin seat 9; a pressure pump 11 and an automatic water replenishment valve 12 are arranged at the end of the L-shaped bin seat 9; a drain valve 13 is arranged above the filter body of the L-shaped bin seat 9; a conductive fine mesh cloth sleeve 14 is arranged on the L-shaped bin seat 9; the inner sides of the conductive fine mesh cloth sleeve 14 are sleeved on the winding roller 15; the upper and lower The unwinding roller 15 is connected by a belt and is connected to the driving motor through a transmission member; the conductive fine mesh cloth sleeve 14 is provided with a water film pair of rollers 16 above the square tube bin; the water film pair of rollers 16 clamp the conductive fine mesh cloth sleeve 14; the conductive fine mesh cloth sleeve 14 is provided with an atomizing power connection bin 17 above the water film pair of rollers; the atomizing power connection bin 17 is provided with an atomizing nozzle; the atomizing nozzle is connected to the pressure pump 11; the electrodes inside the two atomizing power connection bins 17 are respectively connected to the two ends of the high-voltage DC device 18 outside the outer closed cover.

[0019] An ultrasonic cleaner 19 is arranged inside the L-shaped compartment seat 9 of the high-voltage direct current negative pole electric field assembly; a follower roller brush 20 is arranged at the bottom of the conductive fine mesh cloth sleeve 14 .

[0020] The asphalt fume recovery pipeline collects the asphalt fume and sends it to the refrigeration body. The refrigeration pipeline of the refrigeration body circulates refrigeration for the U-shaped refrigeration bin. When the asphalt fume enters the U-shaped refrigeration bin, it is quickly cooled, and the water vapor is quickly condensed to form condensed water droplets. Under the action of gravity, the condensed water droplets enter the bottom of the U-shaped refrigeration bin along with some particulate matter. The asphalt-containing wastewater is discharged to the condensation waste liquid tank through the cross-opening and closing of the double valve bodies. At least one of the double valve bodies is closed to ensure that the entire U-shaped refrigeration bin is in a closed state. After the asphalt fume is condensed, it enters the water film ionization device. The two modules of the high-voltage direct current positive electric field component and the high-voltage direct current negative electric field component of the water film ionization device are in an independent and separated state. When working, water is pumped onto the atomizing nozzle through a pressure pump, and the atomizing bin is filled with atomizing liquid. At the same time, the driving motor drives the winding roller to rotate rapidly through the transmission parts and belts, and a layer of water film is applied to the mesh of the conductive fine mesh cloth cover by the water film roller. And the two conductive fine mesh cloth covers pass through the high-voltage direct current device A whole surface of electrode plates is formed; since the asphalt flue gas is condensed in sequence, most of the steam and liquefied impurities, as well as some impurities covered by droplets, are removed; the asphalt tail gas entering the water film ionization device contains most of the non-condensable gas and a small part of impurities; when entering the water film ionization device, it is necessary to break through the water film and quickly complete the water washing. At this time, the remaining large particles of impurities directly go down with the conductive fine mesh cloth sleeve and leave the flue gas, and the small particles of impurities pass through the water film and are attached with an electric charge, and move forward and contact another conductive fine mesh cloth sleeve. The charged small particles of impurities are adsorbed by the conductive fine mesh cloth sleeve and go down with the conductive fine mesh cloth sleeve. The small particles of impurities are captured by the conductive fine mesh cloth sleeve, the water film and the electric charge, and the flue gas completes secondary treatment. The flue gas contacts the water film for a short time, and the water content of the asphalt flue gas is low; the tail gas treated by the water film ionization device is sequentially ionized and captured by the ionization capture module and the impurities of the non-condensable gas are adsorbed by the activated carbon adsorption module, and finally the tail gas is discharged.

[0021] The above embodiments are only preferred implementations of the present invention, so all equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. An asphalt fume treatment system, characterized in that: It includes a low-asphalt fume recovery pipeline, the output end of the asphalt fume recovery pipeline is connected to a refrigerator, the output end of the refrigerator is connected to a water film ionization device, the output end of the water film ionization device is connected to an ionization capture module, the output end of the ionization capture module is connected to an activated carbon adsorption module, and the output end of the activated carbon adsorption module is the purified tail gas discharge end; The refrigerator comprises a refrigerator body, a U-shaped refrigeration chamber is arranged inside the refrigerator body; a refrigeration pipeline is arranged outside the U-shaped refrigeration chamber; the bottom of the U-shaped refrigeration chamber is connected to the condensation waste liquid tank through a double valve body; one end of the U-shaped refrigeration chamber is connected to the asphalt tail gas recovery pipeline; the other end of the U-shaped refrigeration chamber is connected to the condensation flue gas external exhaust pipe; The water film ionization device comprises an outer closed cover; both ends of the outer closed cover are fixed by flange cover plates; a square tube bin is fixed between the flange cover plates by sealing rings; the square tube bin comprises an input section, an intermediate section and an output section; a high-voltage direct current positive electrode electric field component is arranged between the input section and the intermediate section; a high-voltage direct current negative electrode electric field component is arranged between the intermediate section and the output section; The high-voltage direct current positive pole electric field component and the high-voltage direct current negative pole electric field component include an L-shaped warehouse seat; the square tube warehouse passes through the L-shaped warehouse seat, and the penetration is sealed, and a filter body is arranged at the bottom of the L-shaped warehouse seat; a pressure pump and an automatic water replenishment valve are arranged at the end of the L-shaped warehouse seat; a drain valve is arranged above the filter body of the L-shaped warehouse seat; a conductive fine mesh cloth sleeve is arranged on the L-shaped warehouse seat; the inner two sides of the conductive fine mesh cloth sleeve are sleeved on the winding roller; the upper and lower winding rollers are connected by belts and connected to the drive motor through transmission parts; a water film pair of rollers is arranged above the square tube warehouse on the conductive fine mesh cloth sleeve; the water film pair of rollers clamps the conductive fine mesh cloth sleeve; an atomizing power connection warehouse is arranged above the conductive fine mesh cloth sleeve; an atomizing nozzle is arranged on the atomizing power connection warehouse; the atomizing nozzle is connected to the pressure pump; the electrodes inside the two atomizing power connection warehouses are respectively connected to the two ends of the high-voltage direct current equipment outside the outer closed cover; The asphalt fume recovery pipeline collects the asphalt fume and sends it to the refrigeration body, and the refrigeration pipeline of the refrigeration body circulates refrigeration for the U-shaped refrigeration bin; When the asphalt flue gas enters the U-shaped refrigeration bin, it is quickly cooled and the water vapor is quickly condensed to form condensed water droplets. Under the action of gravity, the condensed water droplets enter the bottom of the U-shaped refrigeration bin along with some particulate matter; the asphalt-containing wastewater is discharged to the condensation waste liquid tank through the cross-opening and closing of the double valve bodies; at least one of the double valve bodies is closed to ensure that the entire U-shaped refrigeration bin is in a closed state. After the asphalt flue gas is condensed, it enters the water film ionization equipment. The two modules of the high-voltage DC positive electric field component and the high-voltage DC negative electric field component of the water film ionization equipment are in an independent and separated state. When working, water is pumped onto the atomizing nozzle through a pressure pump, and the atomizing bin is filled with atomizing liquid. At the same time, the driving motor drives the winding roller to rotate rapidly through the transmission parts and belts, and a layer of water film is applied to the mesh of the conductive fine mesh cloth cover through the water film roller; and the two conductive fine mesh cloth covers form a whole surface of electrode plates through the high-voltage DC equipment; because the asphalt flue gas is condensed in sequence After that, most of the steam and liquefied impurities, as well as some impurities covered by droplets, are removed; the asphalt tail gas entering the water film ionization equipment contains most of the non-condensable gases and a small part of impurities; when entering the water film ionization equipment, it is necessary to break through the water film and quickly complete the water washing. At this time, the remaining large particles of impurities directly go down with the conductive fine mesh cloth sleeve and leave the flue gas. The small particles of impurities pass through the water film and are attached with an electric charge, and move forward and contact another conductive fine mesh cloth sleeve. The charged small particles of impurities are adsorbed by the conductive fine mesh cloth sleeve and go down with the conductive fine mesh cloth sleeve. The small particles of impurities are captured by the conductive fine mesh cloth sleeve, water film and electric charge, and the flue gas completes secondary treatment. The flue gas contacts the water film for a short time, and the water content of the asphalt flue gas is low; the tail gas treated by the water film ionization equipment is successively passed through the ionization capture module for secondary ionization capture and the activated carbon adsorption module for impurity adsorption of non-condensable gases, and finally the tail gas is discharged.

2. The asphalt fume treatment system according to claim 1, characterized in that: An ultrasonic cleaner is arranged inside the L-shaped seat of the high-voltage direct current negative pole electric field component; and a follower roller brush is arranged at the bottom of the conductive fine mesh cloth sleeve.

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