阅读说明：本技术 一种基于胶粉活化工艺应用的橡胶沥青加工方法 (Rubber asphalt processing method based on rubber powder activation process application ) 是由 王国清 秦禄生 李硕 杨龙 张庆 刘延雷 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种基于胶粉活化工艺应用的橡胶沥青加工方法,包括如下步骤：步骤1、胶粉低温活化；步骤2、溶胀反应：步骤3、烟气降解处理；步骤4、烟气过滤处理与蒸汽冷凝回收。本发明可避免胶粉加工过程中挥发物损伤设备,且胶粉在谐振腔中的加工过程可控化管理,避免过度脱硫,对产生的有害废气进行有效处理避免环境污染,适用于橡胶沥青加工技术领域。(The invention discloses a rubber asphalt processing method based on rubber powder activation process application, which comprises the following steps: step 1, activating rubber powder at low temperature; step 2, swelling reaction: step 3, degrading the smoke; and 4, filtering the flue gas and condensing and recycling the steam. The invention can avoid the damage of volatile matters to equipment in the rubber powder processing process, controllably manages the processing process of the rubber powder in the resonant cavity, avoids excessive desulfurization, effectively treats the generated harmful waste gas to avoid environmental pollution, and is suitable for the technical field of rubber asphalt processing.)

1. A rubber asphalt processing method based on rubber powder activation technology application is characterized in that: the method comprises the following steps:

step 1, low-temperature activation of rubber powder: adding rubber powder into the microwave resonant cavity, and performing microwave irradiation to realize desulfurization and activation of the rubber powder;

step 2, swelling reaction: the desulfurized and activated rubber powder enters a rubber asphalt stirring tank through a discharge pipeline for stirring, and simultaneously matrix asphalt and an auxiliary agent are added for mixing, stirring and heating in the rubber asphalt stirring tank to complete a swelling reaction to obtain a finished product of rubber asphalt;

step 3, flue gas degradation treatment: in step 2, asphalt smoke in a rubber asphalt stirring tank enters a microwave resonant cavity through a gas pipeline to form mixed smoke with rubber powder smoke inside the microwave resonant cavity, a smoke degradation device comprising a waveguide tube is arranged at the top of the microwave resonant cavity and is divided into a left part and a right part by a spacer in the waveguide tube, a high-speed gas jet is sprayed out of a nozzle on the left side of the top of the waveguide tube, the mixed smoke of the rubber powder and the asphalt in the microwave resonant cavity rises under the action of pressure difference formed by the high-speed gas jet and enters the left side of the waveguide tube, pollutant molecules in the mixed smoke are degraded through a metal needle of a discharge part on the left side wall of the waveguide tube under the induction of microwaves, most of the pollutant molecules are converted into simple small-molecule safe substances, the degradation power of the discharge part and the microwave activation power in the microwave resonant cavity are degraded along with VOC on the side wall of the microwave resonant cavity_SVOC (volatile organic compounds) monitored by online detector in microwave resonant cavity_SConcentration to prevent excessive desulfurization;

and 4, filtering treatment and condensation recovery: 3, impact screening is carried out on the mixed flue gas of the degraded small molecular safety substances and the undegraded small amount of pollutant molecules through high-speed gas jet, one part of the mixed flue gas enters a waste gas collecting device for filtering treatment to prevent the mixed flue gas from being directly discharged to the outside to pollute the environment, the other part of the mixed flue gas enters a microwave resonant cavity as protective gas to isolate the rubber powder from oxygen, no chemical reaction occurs, and the mixed flue gas is used as protective gas and continues to carry out secondary degradation treatment;

the light oil and water vapor in the microwave resonant cavity are collected through the cooling device and the receiving disc to form liquid containing the light oil, and the liquid is added into the rubber asphalt stirring tank through the drainage tube to improve the performance of asphalt.

2. The rubber asphalt processing method based on the rubber powder activation process application as claimed in claim 1, which is characterized in that: the flue gas degradation device in step 3 includes the waveguide pipe of cask shape structure, the inside division board that is equipped with of waveguide pipe, the division board is divided into two parts about the waveguide pipe, waveguide pipe left side is close to the top position and is equipped with the air inlet, the air inlet is connected with the gas pipeline that high-speed efflux was used, the one end of gas pipeline is connected with the nozzle of the inside injection air current of directional waveguide pipe, the other end has connected gradually roots's fan and exhaust gas collection device, waveguide pipe right side top is provided with the microwave and presents the mouth, the microwave is presented the mouth and is linked to each other with microwave generation device through the waveguide pipeline of rectangle structure, waveguide pipe right side bottom is passed through the gas pipeline and is linked to each other with exhaust gas collection device, waveguide pipe left side wall is equipped with discharge portion.

3. The rubber asphalt processing method based on the rubber powder activation process application as claimed in claim 2, which is characterized in that: the discharge part comprises a plurality of metal needles which are movably arranged on the left side wall of the waveguide tube as discharge electrode materials, the waveguide tube is provided with a needle hole matched with the metal needles, the metal needles are arranged on the left side wall of the waveguide tube through a telescopic mechanism, and the distance or the number of the metal needles entering the waveguide tube is controlled through the telescopic mechanism so as to form the adjustment of the discharge power of the waveguide tube by changing the distance or the number of the metal needles extending into the waveguide tube.

4. The rubber asphalt processing method based on the rubber powder activation process application as claimed in claim 3, which is characterized in that: telescopic machanism includes actuating mechanism, and actuating mechanism is connected with the arc mounting panel with waveguide side wall looks adaptation through transmission assembly, and a plurality of metal needle sets firmly on the arc mounting panel, VOC_SThe on-line detector is electrically connected with the driving mechanism through a control system.

5. The rubber asphalt processing method based on the rubber powder activation process application as claimed in claim 2, which is characterized in that: the cooling device is arranged on the side wall of the waveguide tube and located between the lower portion of the microwave feed inlet and the gas inlet, the cooling device comprises a cooling coil connected with the refrigerator, the temperature range of the cooling coil is 3-7 ℃, the cooling coil is wound between the lower portion of the microwave feed inlet and the gas inlet on the outer side of the waveguide tube to form a low-temperature condensation area, and the outer side of the cooling coil is wrapped with heat insulation cotton.

6. The rubber asphalt processing method based on the rubber powder activation process application as claimed in claim 5, which is characterized in that: the inner wall of the low-temperature condensation area of the waveguide tube is fixedly provided with a receiving disc for collecting foggy light oil and water droplets, the receiving disc is provided with a diversion trench, the diversion trench comprises a longitudinal diversion trench and an annular diversion trench, and the annular diversion trench is communicated with the asphalt stirring tank through a drainage tube.

7. The rubber asphalt processing method based on the rubber powder activation process application as claimed in claim 3, which is characterized in that: the metal needle adopts a metal tungsten needle as a discharge electrode material, the metal needle is a short needle with the length of 25mm and the diameter of 1mm, the diameter of a pinhole on the left side wall of the waveguide tube is 3-5mm, and the number of the metal needles is 15-20.

8. The rubber asphalt processing method based on the rubber powder activation process application as claimed in claim 2, which is characterized in that: the waste gas collecting device comprises an activated carbon filter box, an activated carbon filter screen is arranged in the activated carbon filter box, and the activated carbon filter box is communicated with the bottom of the right side of the waveguide tube through a flue gas pipeline.

9. The rubber asphalt processing method based on the rubber powder activation process application as claimed in claim 8, wherein the rubber asphalt processing method comprises the following steps: the gas pipeline is a DN100 metal pipeline, the microwave suppression length of the gas pipeline is 400mm, the tail end of the metal pipeline is connected with the activated carbon filter box through a connecting hose or a metal pipe according to the arrangement condition of equipment, the high-speed jet flow direction and the vertical direction form an included angle of 50-60 degrees so as to ensure that negative pressure is generated above the left side of the waveguide tube, and the pressure range is-15 KPa-10 KPa.

10. The rubber asphalt processing method based on the rubber powder activation process application as claimed in claim 2, which is characterized in that: the isolation plate is made of polytetrafluoroethylene isolation plates, the microwave feed inlet is provided with a smoke medium sheet, and the smoke medium sheet is made of polytetrafluoroethylene, ceramic or mica.

Technical Field

The invention belongs to the technical field of rubber asphalt processing, and particularly relates to a rubber asphalt processing method based on rubber powder activation process application.

Background

The rubber powder is a powdery rubber material obtained by crushing and processing waste rubber products, the rubber powder is activated by microwave irradiation, the waste rubber is generally crushed into colloidal particles with the size of 20-60 meshes, a certain amount of dispersing agent is added, the colloidal particles are conveyed into a pipeline made of glass or ceramics, the colloidal particles move forward at a certain speed, the energy emitted by a microwave generator is received, and the energy of the microwave generator is adjusted, so that C-S, S-S bonds in rubber powder molecules are broken, and the aim of regeneration is fulfilled.

However, in the production of microwave radiation activated rubber powder and the application of asphalt modification, the following common problems exist:

(1) under the microwave irradiation, the temperature of the rubber powder can continuously rise, moisture and light oil in the rubber powder can volatilize, smoke is generated, the smoke floats upwards and enters a circular waveguide tube, a magnetron of a microwave generating device is damaged, and the normal continuous working time of equipment is influenced.

(2) The rubber powder is subjected to microwave irradiation activation in a closed resonant cavity, the desulfurization degree cannot be directly monitored, the microwave energy is concentrated, the temperature rise rate of the rubber powder is high, the excessive desulfurization phenomenon is easily generated on the rubber powder, and the service performance of the activated rubber powder is seriously influenced.

(3) A large amount of harmful waste gas is generated in the production process of the rubber asphalt, a whole set of waste gas treatment equipment needs to be arranged, and the production cost is high.

Disclosure of Invention

The invention provides a rubber asphalt processing method based on rubber powder activation process application, which is used for solving the problems that in the microwave irradiation activation rubber powder processing process, volatile matters in rubber powder damage equipment, the desulfurization processing process of the rubber powder in a resonant cavity is uncontrollable, harmful waste gas generated in the production process of the rubber powder as a processing raw material of rubber asphalt pollutes the environment, and the production cost is high when the waste gas processing equipment is independently established.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a rubber asphalt processing method based on rubber powder activation process application comprises the following steps:

step 1, low-temperature activation of rubber powder: adding rubber powder into the microwave resonant cavity, and performing microwave irradiation to realize desulfurization and activation of the rubber powder;

step 2, swelling reaction: the desulfurized and activated rubber powder enters a rubber asphalt stirring tank through a discharge pipeline for stirring, and simultaneously matrix asphalt and an auxiliary agent are added for mixing, stirring and heating in the rubber asphalt stirring tank to complete a swelling reaction to obtain a finished product of rubber asphalt;

step 3, flue gas degradation treatment: in step 2, asphalt smoke in a rubber asphalt stirring tank enters a microwave resonant cavity through a gas pipeline to form mixed smoke with rubber powder smoke inside the microwave resonant cavity, a smoke degradation device comprising a waveguide tube is arranged at the top of the microwave resonant cavity and is divided into a left part and a right part by a spacer in the waveguide tube, a high-speed gas jet is sprayed out of a nozzle on the left side of the top of the waveguide tube, the mixed smoke of the rubber powder and the asphalt in the microwave resonant cavity rises under the action of pressure difference formed by the high-speed gas jet and enters the left side of the waveguide tube, pollutant molecules in the mixed smoke are degraded through a metal needle of a discharge part on the left side wall of the waveguide tube under the induction of microwaves, most of the pollutant molecules are converted into simple small-molecule safe substances, the degradation power of the discharge part and the microwave activation power in the microwave resonant cavity are degraded along with VOC on the side wall of the microwave resonant cavity_SVOC (volatile organic compounds) monitored by online detector in microwave resonant cavity_SConcentration to prevent excessive desulfurization;

and 4, filtering treatment and condensation recovery: 3, impact screening is carried out on the mixed flue gas of the degraded small molecular safety substances and the undegraded small amount of pollutant molecules through high-speed gas jet, one part of the mixed flue gas enters a waste gas collecting device for filtering treatment to prevent the mixed flue gas from being directly discharged to the outside to pollute the environment, the other part of the mixed flue gas enters a microwave resonant cavity as protective gas to isolate the rubber powder from oxygen, no chemical reaction occurs, and the mixed flue gas is used as protective gas and continues to carry out secondary degradation treatment;

the light oil and water vapor in the microwave resonant cavity are collected through the cooling device and the receiving disc to form liquid containing the light oil, and the liquid is added into the rubber asphalt stirring tank through the drainage tube to improve the performance of asphalt.

Further, flue gas degradation device in step 3 includes the wave guide of cask shape structure, the inside division board that is equipped with of wave guide, the division board is divided into two parts about with the wave guide, the wave guide left side is close to the top position and is equipped with the air inlet, the air inlet is connected with the gas pipeline that high-speed efflux was used, the one end of gas pipeline is connected with the nozzle to the inside jet stream of wave guide, the other end has connected gradually roots's fan and exhaust gas collecting device, wave guide right side top is provided with the microwave and presents the mouth, the microwave is presented the mouth and is linked to each other with microwave generating device through the wave guide pipeline of rectangle structure, wave guide right side bottom is passed through the gas pipeline and is linked to each other with exhaust gas collecting device, wave guide left side wall is equipped with discharge portion.

Furthermore, the discharge portion includes that a plurality of is installed in the metal needle of waveguide pipe left side wall as discharge electrode material activity, and the waveguide pipe is seted up the pinhole with the metal needle adaptation, and the metal needle passes through telescopic machanism and locates on the waveguide pipe left side wall, and the distance or the quantity that gets into the waveguide intraductal metal needle are controlled through telescopic machanism to constitute its discharge power's adjustment through changing the distance or the quantity that the metal needle stretches into the waveguide intraduct.

Further, telescopic machanism includes actuating mechanism, and actuating mechanism is connected with the arc mounting panel with waveguide side wall looks adaptation through transmission assembly, and a plurality of metal needle sets firmly on the arc mounting panel, VOC_SThe on-line detector is electrically connected with the driving mechanism through a control system.

Furthermore, the cooling device is arranged on the side wall of the waveguide tube and located between the lower portion of the microwave feed inlet and the gas inlet, the cooling device comprises a cooling coil connected with the refrigerator, the temperature range of the cooling coil is 3-7 ℃, the cooling coil is wound between the lower portion of the microwave feed inlet and the gas inlet on the outer side of the waveguide tube to form a low-temperature condensation area, and the outer side of the cooling coil is wrapped with heat insulation cotton.

Furthermore, a receiving disc for collecting the foggy light oil and water droplets is fixedly arranged on the inner wall of the low-temperature condensation area of the waveguide tube, a diversion trench is formed in the receiving disc and comprises a longitudinal diversion trench and an annular diversion trench, and the annular diversion trench is communicated with the asphalt stirring tank through a drainage tube.

Furthermore, the metal needle adopts a metal tungsten needle as a discharge electrode material, the metal needle is a short needle with the length of 25mm and the diameter of 1mm, the diameter of a pinhole on the left side wall of the waveguide tube is 3-5mm, and the number of the metal needles is 15-20.

Further, the waste gas collecting device comprises an activated carbon filter box, an activated carbon filter screen is arranged in the activated carbon filter box, and the activated carbon filter box is communicated with the bottom of the right side of the waveguide tube through a flue gas pipeline.

Furthermore, the gas pipeline is a DN100 metal pipeline, the microwave suppression length of the gas pipeline is 400mm, the tail end of the metal pipeline is connected with the activated carbon filter box through a connecting hose or a metal pipe according to the arrangement condition of equipment, the high-speed jet flow direction and the vertical direction form an included angle of 50-60 degrees so as to ensure that negative pressure is generated above the left side of the waveguide tube, and the pressure range is-15 KPa-10 KPa.

Furthermore, the isolation plate is made of a polytetrafluoroethylene isolation plate, a smoke medium sheet is arranged at the microwave feed port, and the smoke medium sheet is made of polytetrafluoroethylene, ceramic or mica.

Due to the adoption of the structure and the method, compared with the prior art, the invention has the technical progress that: in the production process, asphalt smoke in a rubber asphalt stirring tank enters a microwave resonant cavity through a gas pipeline to form mixed smoke with rubber powder smoke inside the microwave resonant cavity, a smoke degradation device comprising a waveguide tube is arranged at the top of the microwave resonant cavity, a partition sheet in the waveguide tube divides the microwave resonant cavity into a left part and a right part, a nozzle on the left side of the top of the waveguide tube sprays high-speed gas jet, the mixed smoke of rubber powder and asphalt in the microwave resonant cavity rises under the action of pressure difference formed by the high-speed gas jet and enters the left side of the waveguide tube together, and the mixed smoke of the rubber powder and the asphalt in the microwave resonant cavity rises under the action of pressure difference formed by the high-speed gas jet and enters the left side of the waveguide tubePollutant molecules in the combined flue gas are induced by microwaves, pass through the discharge part on the left side wall of the waveguide tube, the metal tungsten needle of the discharge part discharges to generate high temperature, strong light and plasma effects, high-energy electrons bombard the pollutant molecules to enable the pollutant molecules to be ionized, dissociated and excited, the pollutant molecules are converted into simple small-molecule safe substances, the degradation power of the discharge part and the microwave activation power in the microwave resonant cavity follow VOC on the side wall of the microwave resonant cavity_SVOC (volatile organic compounds) monitored by online detector in microwave resonant cavity_SConcentration to prevent excessive desulfurization;

the mixed flue gas of degraded small molecular safety substances and undegraded small amount of pollutant molecules is subjected to impact screening through high-speed gas jet, one part of the mixed flue gas enters a waste gas collecting device for filtering treatment to prevent pollution and environment pollution except the degraded small molecular safety substances, and the other part of the mixed flue gas enters a microwave resonant cavity as protective gas to ensure that rubber powder and oxygen are isolated from each other and cannot generate chemical reaction, and the mixed flue gas is used as protective gas and continues to be subjected to secondary degradation treatment; on one hand, environmental pollution caused by the emission of pollutant molecules to the outside is avoided, a whole set of waste gas treatment equipment is not required to be additionally arranged, and on the other hand, the pollutant molecules are prevented from entering a microwave generating device along a waveguide pipeline to damage a magnetron of the equipment and influence the normal operation of the equipment;

the light oil and water vapor rising in the microwave resonant cavity are collected by a cooling device and a receiving disc to form liquid containing the light oil and water, and the liquid is added into a rubber asphalt stirring tank through a drainage tube to improve the performance of asphalt;

in addition by VOC_SThe online detector can monitor the desulfurization degree in the microwave resonant cavity in real time, realize controllable management, avoid the phenomenon of excessive desulfurization of rubber powder from occurring, influence the service performance of activated rubber powder, and is electrically connected with the flue gas degradation device through a control system, so that the discharge power of the flue gas degradation device is controlled in a linkage manner, and the change of the flue gas concentration in the microwave resonant cavity is adapted.

In conclusion, the device can avoid the damage of flue gas volatile matters in the rubber powder processing process, the processing process of the rubber powder in the resonant cavity can be managed in a controllable manner, the excessive desulfurization of the rubber powder is prevented, the product index is good, the generation of unnecessary flue gas is reduced, the generated harmful waste gas is effectively treated to avoid environmental pollution, and the light oil after the degradation treatment of the flue gas is added into the rubber asphalt stirring tank, so that the device has a good promotion effect on the processing quality of the rubber asphalt, and is suitable for the technical field of rubber asphalt processing.

Drawings

The accompanying drawings, which 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 principles of the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a receiving tray in an embodiment of the present invention.

Labeling components: 1-rubber asphalt stirring tank, 2-microwave resonant cavity, 3-VOC_SThe device comprises an online detector, a 4-flue gas pipeline, a 5-discharge pipeline, a 61-microwave generating device, 621-a waveguide tube, 6211-a microwave feed inlet, 622-a separation plate, 623-a metal needle, 624-an arc mounting plate, 625-a transmission assembly, 626-a driving mechanism, 627-a flue gas medium sheet, 628-a nozzle, 629-a receiving disc, 6291-a longitudinal diversion trench, 6292-an annular diversion trench, 63-an exhaust gas collecting device, 641-a refrigerator, 642-a cooling coil, a 7-gas pipeline, an 8-a waveguide pipeline and a 9-a drainage tube.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.

The invention provides a rubber asphalt processing method based on rubber powder activation process application, which comprises the following specific steps:

step 1, low-temperature activation of rubber powder: adding rubber powder into the microwave resonant cavity 2, and performing microwave irradiation to realize desulfurization and activation of the rubber powder;

step 2, swelling reaction: the desulfurized and activated rubber powder enters the rubber asphalt stirring tank 1 through the discharge pipeline 5 for stirring, and simultaneously, the matrix asphalt and the auxiliary agent are added for mixing, stirring and heating in the rubber asphalt stirring tank 1 to complete the swelling reaction, so as to obtain the finished product rubber asphalt;

step 3, flue gas degradation treatment: in the step 2, asphalt flue gas in the rubber asphalt stirring tank 1 enters the microwave resonant cavity 2 through the gas pipeline 7 to form mixed flue gas with rubber powder flue gas in the microwave resonant cavity 2, the top of the microwave resonant cavity 2 is provided with a flue gas degradation device comprising a waveguide 621, a partition sheet in the waveguide 621 divides the microwave resonant cavity into a left part and a right part, a nozzle 628 at the left side of the top of the waveguide 621 sprays high-speed gas jet, the mixed flue gas of the rubber powder and the asphalt in the microwave resonant cavity 2 rises under the action of pressure difference formed by the high-speed gas jet and enters the left side of the waveguide 621 together, pollutant molecules in the mixed flue gas are degraded through a metal needle 623 of a discharge part at the left side wall of the waveguide 621 under the induction of microwave, most pollutant molecules are converted into simple small molecule safe substances, and the discharge part has degradation power, and the microwave activation power in the microwave resonant cavity 2 follows VOC on the side wall of the microwave resonant cavity 2._SThe online detector 3 monitors VOC inside the microwave resonant cavity 2_SConcentration to prevent excessive desulfurization;

and 4, filtering treatment and condensation recovery: the mixed flue gas of the degraded small molecular safety substances and the undegraded small amount of pollutant molecules in the step 3 is subjected to impact screening through high-speed gas jet, one part of the mixed flue gas enters a waste gas collecting device 63 for filtering treatment to prevent the mixed flue gas from being directly discharged to the outside to pollute the environment, and the other part of the mixed flue gas enters a microwave resonant cavity 2 as protective gas to isolate rubber powder from oxygen, so that no chemical reaction occurs, and the mixed flue gas is used as protective gas and continues to be subjected to secondary degradation treatment;

the light oil and water vapor rising in the microwave resonant cavity 2 are collected by the cooling device and the receiving disc 629 to form liquid containing the light oil, and the liquid is added into the rubber asphalt stirring tank 1 through the drainage tube 9, which improves the performance of asphalt.

The method has the beneficial effects that: in the production process, asphalt smoke in the rubber asphalt stirring tank 1 enters the microwave resonant cavity 2 through the gas pipeline 7 to be mixed with rubber powder smoke in the microwave resonant cavity 2The flue gas, the microwave cavity 2 top is equipped with the flue gas degradation device including waveguide 621, the spacer in the waveguide 621 is divided into two parts about it, the nozzle 628 on the left side of waveguide 621 top spouts the high-speed gas efflux, the mixed flue gas of gelatine powder and pitch in the microwave cavity 2 rises under the pressure differential effect that the high-speed gas efflux formed and gets into the left side of waveguide 621 together, pollutant molecule in the mixed flue gas is under the microwave induction, through the discharge portion of waveguide 621 left side wall, the metal tungsten needle of discharge portion discharges and can produce high temperature, highlight and plasma effect, high energy electron strikes pollutant molecule, make its ionization, dissociation and excitation, change into simple micromolecule safety material, the partial degradation power of discharging, and microwave activation power in the microwave cavity 2 is along with VOC on the microwave cavity 2 lateral wall_SThe online detector 3 monitors VOC inside the microwave resonant cavity 2_SConcentration to prevent excessive desulfurization;

the mixed flue gas of degraded micromolecular safe substances and undegraded small amount of pollutant molecules is subjected to impact screening through high-speed gas jet, one part of the mixed flue gas enters a waste gas collecting device 63 for filtering treatment to prevent pollution and environment pollution except the degraded micromolecular safe substances, and the other part of the mixed flue gas serving as protective gas enters a microwave resonant cavity 2 to ensure that rubber powder and oxygen are isolated from each other and do not generate chemical reaction, and the mixed flue gas serving as the protective gas is continuously subjected to secondary degradation treatment; on one hand, the pollution to the environment caused by the emission of pollutant molecules to the outside is avoided, and a whole set of waste gas treatment equipment is not required to be added, on the other hand, the pollutant molecules are prevented from entering the microwave generating device 61 along the waveguide pipeline 8, so that the damage to a magnetron of the equipment is prevented, and the normal operation of the equipment is influenced;

the light oil and water vapor rising in the microwave resonant cavity 2 are collected by a cooling device and a receiving disc 629 to form liquid containing the light oil, and the liquid is added into the rubber asphalt stirring tank 1 through a drainage tube 9 to improve the performance of asphalt;

in addition by VOC_SThe on-line detector 3 can monitor the desulfurization degree in the microwave resonant cavity 2 in real time, realize controllable management, avoid the phenomenon of excessive desulfurization of rubber powder from occurring and influence the service performance of the activated rubber powderAnd is electrically connected with the smoke degradation device through a control system, so that the discharge power of the smoke degradation device is controlled in a linkage manner, and the smoke degradation device is adapted to the change of the smoke concentration in the microwave resonant cavity 2.

The invention also provides rubber powder activation-based rubber asphalt processing equipment, which comprises a plurality of rubber asphalt stirring tanks 1 arranged side by side as shown in figure 1, wherein a feeding port at the top of each rubber asphalt stirring tank 1 is connected with a discharging port at the bottom of a microwave resonant cavity 2 through a discharging pipeline 5, the side walls of the microwave resonant cavities 2 are connected with the top of each rubber asphalt stirring tank 1 through a flue gas pipeline 4, the top of each microwave resonant cavity 2 is provided with a flue gas degradation system, and the side walls of the microwave resonant cavities 2 are provided with VOCs (volatile organic compounds)_SOn-line detector 3, flue gas degradation system and VOC_SThe online detector 3 is electrically connected through a control system;

the flue gas degradation system comprises a microwave generation device 61, a flue gas degradation device, a cooling device and a waste gas collection device 63, wherein the microwave generation device 61 is connected with the top of the flue gas degradation device through a waveguide pipeline 8, the cooling device is arranged at the top of the flue gas degradation device and located below the microwave waveguide pipeline 8, the flue gas degradation device is arranged at the top of the microwave resonant cavity 2 and connected with the waste gas collection device 63 through a gas pipeline, and the devices are electrically connected with a control system.

The equipment has the advantages that: in the production process, asphalt smoke in the rubber asphalt stirring tank 1 enters the microwave resonant cavity 2 through the smoke pipeline 4 at the top, and is converged with rubber powder smoke in the microwave resonant cavity 2 to form mixed smoke, and the mixed smoke in the microwave resonant cavity 2 rises from the top and enters the smoke degradation device; pollutant molecules in the mixed flue gas are degraded under the action of microwave irradiation high temperature, strong light and plasma effect in the flue gas degradation device, a part of degraded micromolecule safe substances and undegraded small pollutant molecules enter a waste gas collecting device 63 for filtering treatment to prevent pollution except the degraded micromolecule safe substances from polluting the environment, and the other part of degraded micromolecule safe substances enters a microwave resonant cavity 2 as protective gas to isolate rubber powder from oxygen, so that chemical reaction can not occur, and the degraded micromolecule safe substances are used as protective gas and continue to be subjected to secondary degradation treatment; on the one hand, avoidPollutant molecules are discharged to the outside to cause environmental pollution, a whole set of waste gas treatment equipment is not required to be additionally arranged, and on the other hand, the pollutant molecules are prevented from entering the microwave generating device 61 along the waveguide pipeline 8 to damage a magnetron of the equipment and influence the normal operation of the equipment; in addition by VOC_SThe online detector 3 can monitor the desulfurization degree in the microwave resonant cavity 2 in real time, realize controllable management, avoid the occurrence of excessive desulfurization phenomenon of rubber powder to influence the service performance of activated rubber powder, and is electrically connected with the flue gas degradation device through a control system to realize the size of the degradation power of the flue gas degradation device in a linkage manner so as to adapt to the change of the flue gas concentration in the microwave resonant cavity 2. (ii) a And the light oil and water vapor rising in the microwave resonant cavity 2 are collected by a cooling device to form liquid containing the light oil and water, and the liquid is added into the rubber asphalt stirring tank 1, so that the performance of asphalt is improved.

As a preferred embodiment of the present invention, as shown in fig. 1, the smoke degradation device includes a waveguide 621 having a cylindrical structure, a partition board 622 is disposed inside the waveguide 621, the partition board 622 divides the waveguide 621 into a left part and a right part, a gas inlet is disposed at a position near the top of the left side of the waveguide 621, the gas inlet is connected to a gas pipeline for high-speed jet, one end of the gas pipeline is connected to a nozzle 628 for spraying gas flow into the waveguide 621, the other end of the gas pipeline is sequentially connected to a roots blower and an exhaust gas collecting device 63, a microwave feed-in port 6211 is disposed at the top of the right side of the waveguide 621, the microwave feed-in port 6211 is connected to a microwave generating device 61 through a waveguide pipeline 8 having a rectangular structure, the bottom of the right side of the waveguide 621 is connected to the exhaust gas collecting device 63 through a gas pipeline, and a discharge portion is disposed on the left side wall of the waveguide 621. The isolating plate 622 is made of polytetrafluoroethylene isolating plate 622, the microwave feed-in port 6211 is provided with a flue gas medium sheet 627, and the flue gas medium sheet 627 is made of polytetrafluoroethylene, ceramic or mica.

The beneficial effect of this embodiment lies in: the nozzle 628 is arranged above the left side of the waveguide 621 with a circular structure, a high-speed gas jet is generated by the nozzle 628 through the Roots blower, and negative pressure is generated near the nozzle 628, namely, the jet negative pressure principle, so that only negative pressure is generated above the left side of the waveguide 621, but no negative pressure exists on the right side of the waveguide 621, harmful waste gas such as pollutant molecules and the like generated in the production process of the microwave resonant cavity 2 is influenced by the negative pressure above the left side of the waveguide 621 and enters the left side of the waveguide 621, the harmful waste gas is effectively degraded in the waveguide 621 through the discharge part on the left side, oxygen is not contained in the degraded waste gas, mainly harmful waste gas of small-molecule safety substances, the degraded harmful waste gas is driven by the high-speed gas jet and enters the waveguide 621 on the right side and then is divided into two parts, one part of the harmful waste gas enters the microwave resonant cavity 2 downwards to separate rubber powder from oxygen and does not generate chemical reaction, the function of protecting gas is achieved, and secondary degradation treatment is carried out; the other part enters the waste gas collecting device 63 rightwards for treatment to prevent direct discharge to pollute the environment, and the steam of light oil and moisture contained in the ascending mixed flue gas in the microwave resonant cavity 2 is condensed by the cooling device and then is recovered by the receiving disc 629 and is added into the rubber asphalt stirring tank 1 through the drainage tube 9 to improve the asphalt processing quality.

The smoke medium plate 627 is arranged at the microwave feed-in port 6211, so that smoke in the microwave resonant cavity 2, degraded small molecular substances and undegraded pollutant molecules can be prevented from entering the rectangular microwave waveguide to contact with the magnetron, damage is caused to the microwave generating device 61, and normal operation of the device is influenced.

The general waveguide 621 only plays a role in transmitting microwaves, and the waveguide 621 is provided with devices such as a metal tungsten needle for discharge degradation, a nozzle 628 for generating negative pressure by high-speed gas jet, a cooling device, a receiving disc 629 for electrostatic adsorption, condensation and droplet collection, and the like, so that the waveguide 621 has the functions of degrading smoke, directionally circulating gas and collecting droplets, and is the core content of the invention.

As a preferred embodiment of the present invention, as shown in fig. 1, the discharge portion includes a plurality of metal needles 623 movably mounted on the left sidewall of the waveguide 621 as a discharge electrode material, the waveguide 621 is provided with a needle hole adapted to the metal needles 623, the metal needles 623 are disposed on the left sidewall of the waveguide 621 through a telescopic mechanism, and the telescopic mechanism controls the distance or the number of the metal needles 623 entering the waveguide 621 so as to change the distance or the number of the metal needles 623 extending into the waveguide 621Thereby adjusting the discharge power. The telescopic mechanism comprises a driving mechanism 626, the driving mechanism 626 is connected with an arc-shaped mounting plate 624 matched with the side wall of the waveguide 621 through a transmission component 625, a plurality of metal needles 623 are fixedly arranged on the arc-shaped mounting plate 624, and VOC (volatile organic Compounds) is generated_SThe online detector 3 is electrically connected to the driving mechanism 626 through a control system. The metal needles 623 adopt metal tungsten needles as discharge electrode materials, the metal needles 623 are short needles 25mm long and 1mm in diameter, the diameter of needle holes in the left side wall of the waveguide tube 621 is 3-5mm, and the number of the metal needles 623 is 15-20.

The beneficial effect of this embodiment lies in: by using the telescopic mechanism, the metal tungsten needle can be located outside the cavity of the waveguide 621, and can also enter the cavity of the waveguide 621 through the needle hole. By changing the distance or the quantity of the metal needles 623 stretching into the waveguide 621, the discharge power of the metal needles can be adjusted to account for the output power percentage of the microwave generating device 61, so that the discharge power of the metal needles corresponds to the change of the smoke concentration of the rubber powder in the microwave resonant cavity 2, the excessive degradation of the rubber powder smoke caused by the overhigh discharge power of the discharge part is avoided, the waste of microwave energy is avoided, and a large amount of discharge exceeds the requirement of smoke degradation. The metal tungsten needle is selected as a discharge electrode material, on one hand, the tungsten metal has moderate work function (4.5eV), and can relatively easily trigger the discharge phenomenon under microwave irradiation; on the other hand, tungsten metal has high melting point (3410 +/-20 ℃), is not easy to melt at high temperature and has longer service life.

Specifically, in this embodiment, the discharge power is adjusted by changing the amount of the part extending into the left side of the waveguide 621 through the telescopic mechanism relative to the output power percentage of the microwave generating device 61. The adjusting method comprises the following steps:

the side wall of the microwave resonant cavity 2 is provided with VOC_SAn on-line detector 3 with a monitoring range of 0-200 mg/m³Resolution 1mg/m³Monitoring each VOC in real time_SThe concentration of (c);

when the concentration is less than 20mg/m³At this time, 5 metal tungsten needles extend into the circular waveguide 621, and the ratio of the discharge power of the metal tungsten needles to the microwave output power is about 12% to 16%.

Most of the power of the microwave generating device 61 is used for rubber powder activation desulfurization, the generated mixed flue gas enters the left side of the waveguide 621 under the action of pressure difference, the metal tungsten needle discharges to generate high temperature and plasma environment to degrade the flue gas, the degraded gas enters the right side of the waveguide 621, one part of the degraded gas enters the waste gas collecting device 63 through the gas pipeline to be treated, the other part of the degraded gas enters the microwave resonant cavity 2 to play a role of protecting the gas and carry out secondary degradation treatment, steam of light oil and moisture in the mixed flue gas passes through the receiving disc 629 of the cooling device, condensed liquid drops are added into the rubber asphalt stirring tank 1 to improve the asphalt quality, meanwhile, the cleanliness of the flue gas medium piece 627 at the feed-in port is ensured, and the safe continuous working time of the equipment is further ensured.

With VOC_SThe concentration is increased, the number of the metal tungsten needles extending into the waveguide 621 is increased, the discharge power of the metal tungsten needles, namely the smoke degradation power, is increased, the rubber powder activation power is reduced, on one hand, the smoke is reduced, on the other hand, the excessive desulfurization of the rubber powder is prevented, and the product index is good; and the generation of unnecessary smoke is reduced.

When VOC is_SThe concentration is more than 20mg/m³Less than 100mg/m³In the meantime, the number of the tungsten needles extending into the circular waveguide 621 is: n is 5+ (C-20)/5 (integer), C represents VOC_SAnd (4) concentration.

The ratio of the smoke degradation power to the microwave output power is about 3 n-3.9 n%.

When VOC is_SThe concentration is more than 100mg/m³And judging that the activation effect is achieved at the moment, stopping outputting the microwave power source, and timely sending the activated rubber powder into the rubber asphalt stirring tank 1.

As a preferred embodiment of the present invention, as shown in fig. 1, the cooling device is disposed on the sidewall of the waveguide 621 between the microwave feeding port 6211 and the gas inlet, the cooling device includes a cooling coil 642 connected to the refrigerator 641, the temperature of the cooling coil 642 ranges from 3 ℃ to 7 ℃, the cooling coil 642 is wound around the outside of the waveguide 621 between the microwave feeding port 6211 and the gas inlet to form a low-temperature condensation zone, and the outside of the cooling coil 642 is wrapped with insulation cotton. A receiving pan 629 for collecting vaporous light oil and moisture droplets is fixedly arranged on the inner wall of the low-temperature condensation area of the waveguide 621, a diversion trench is formed in the receiving pan 629 and comprises a longitudinal diversion trench 6291 and an annular diversion trench 6292, and the annular diversion trench 6292 is communicated with the asphalt stirring tank through a drainage tube 9.

The beneficial effect of this embodiment lies in: the vapor of light oil and water which are not taken away by the high-speed gas jet flow continuously diffuses upwards and enters a low-temperature condensation area, the metal needle 623 on the left side wall of the waveguide tube 621 discharges to generate free electrons, the vapor carries the free electrons through the degradation area of the left side waveguide tube 621 and is condensed into liquid drops, the free electrons are gathered, and the receiving disc 629 is subjected to the action of a strong external electric field in advance to generate positive charges to attract the liquid drops with the free electrons to be gathered together. The polarized charges exist on the surface and in the body of the liquid drop permanently, are not removed with an external electric field and disappear completely, and can generate electrostatic acting force under the condition of no external electric field. The flow guide groove is arranged on the receiving disc 629, the vaporous liquid drops are absorbed by the receiving disc 629 and then are gathered to form large liquid, the large liquid is collected by the flow guide groove and then is output by the drainage tube 9, the liquid containing light oil and moisture is added into the rubber asphalt stirring tank 1, the asphalt performance is improved, meanwhile, the light oil and moisture vapor are prevented from being bonded to the surface of the flue gas medium piece 627, the flue gas medium piece 627 is polluted, the cleanliness of the flue gas medium piece 627 of the microwave feed-in opening 6211 is ensured, and the continuous safe working time of the feed-in opening is ensured.

As a preferred embodiment of the present invention, as shown in fig. 1, the exhaust gas collecting device 63 includes an activated carbon filter box, an activated carbon filter screen is disposed in the activated carbon filter box, and the activated carbon filter box is communicated with the bottom of the right side of the waveguide 621 through a flue gas pipe. The gas pipeline 7 is a DN100 metal pipeline, the microwave suppression length of the gas pipeline is 400mm, the tail end of the metal pipeline is connected with the activated carbon filter box through a connecting hose or a metal pipe according to the arrangement condition of equipment, the high-speed jet flow direction and the vertical direction form an included angle of 50-60 degrees so as to ensure that negative pressure is generated above the left side of the waveguide tube 621, and the pressure range is-15 KPa-10 KPa.

The beneficial effect of this embodiment lies in: through setting up waste gas collection device 63, can handle the micromolecule safety material after the degradation and the minority of parts pollutant molecule that is not degraded by the portion of discharging, prevent that it from directly arranging outward and causing environmental pollution, through the cooperation with the portion of discharging, need not add a whole set of waste gas treatment system or equipment again, practice thrift the production input.

The maximum air quantity provided by the Roots blower is 20m³And h, a large amount of gas passes through the nozzle 628 to form high-speed gas jet flow, the direction of the high-speed gas jet flow and the vertical direction form an included angle of 50-60 degrees, on one hand, negative pressure is generated above the left side of the circular waveguide tube 621, and is from-15 KPa to-10 KPa, and on the other hand, the gas of the high-speed jet flow drives smoke gas rising in the circular waveguide tube on the left side to enter the circular waveguide tube 621 on the right side.

In conclusion, the device can prevent volatile matters in the flue gas from damaging the equipment in the rubber powder processing process, the processing process of the rubber powder in the resonant cavity can be managed in a controllable manner, excessive desulfurization of the rubber powder is prevented, the product index is good, unnecessary flue gas is reduced, the generated harmful waste gas is effectively treated to avoid environmental pollution, and the light oil after the flue gas degradation treatment is added into the rubber asphalt stirring tank 1, so that the device has a good promotion effect on the processing quality of the rubber asphalt, and is suitable for the technical field of rubber asphalt processing.

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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.