阅读说明：本技术 一种沥青混合料热再生尾气处理装置及方法 (Asphalt mixture thermal regeneration tail gas treatment device and method ) 是由 潘泽源 高岱乐 马昆斌 于 2019-09-03 设计创作，主要内容包括：本发明涉及沥青尾气处理设备技术领域,特别涉及一种沥青混合料热再生尾气处理装置及方法。该装置包括再生烘干滚筒、原生烘干滚筒、蜗壳除尘器、引风机、热料暂存仓,蜗壳除尘器分别与再生尾气出口、引风机、热料暂存仓连接,引风机与原生燃烧器连接,出料口连接至热料暂存仓,引风机对蜗壳除尘器产生负压使尾气通过再生尾气出口送至蜗壳除尘器内,尾气中的粉料在蜗壳除尘器内被分离并送入热料暂存仓,余下尾气进入引风机内并被送至原生燃烧器处燃烧。设备产出的成品料级配不变、生产品质稳定,尾气处理效率高,设备可根据工况自适应调整,稳定性高。(The invention relates to the technical field of asphalt tail gas treatment equipment, in particular to a device and a method for treating asphalt mixture thermal regeneration tail gas. The device comprises a regeneration drying roller, a primary drying roller, a volute dust remover, an induced draft fan and a hot material temporary storage bin, wherein the volute dust remover is respectively connected with a regeneration tail gas outlet, the induced draft fan and the hot material temporary storage bin, the induced draft fan is connected with a primary combustor, a discharge port is connected to the hot material temporary storage bin, the induced draft fan generates negative pressure on the volute dust remover to enable tail gas to be delivered into the volute dust remover through the regeneration tail gas outlet, powder in the tail gas is separated in the volute dust remover and is delivered into the hot material temporary storage bin, and the rest tail gas enters the induced draft fan and is delivered to the primary combustor for combustion. The finished product material gradation of equipment output is unchangeable, production quality is stable, and the tail gas treatment efficiency is high, and equipment can be according to operating mode self-adaptation adjustment, and stability is high.)

1. The utility model provides a hot regeneration tail gas processing apparatus of bituminous mixture, includes regeneration drying roller, primary drying roller, regeneration drying roller includes discharge gate, regeneration tail gas export, and primary drying roller includes primary combustor, its characterized in that: still include spiral case dust remover, draught fan, hot material temporary storage storehouse, the spiral case dust remover is connected with regeneration tail gas export, draught fan, hot material temporary storage storehouse respectively, and the draught fan is connected with native combustor, and the discharge gate is connected to hot material temporary storage storehouse, and the draught fan produces the negative pressure to the spiral case dust remover and makes tail gas deliver to the spiral case dust remover in through regeneration tail gas export, and the powder in the tail gas is separated and is sent into hot material temporary storage storehouse in the spiral case dust remover, and remaining tail gas gets into in the draught fan and is delivered to native combustor department burning.

2. The asphalt mixture thermal regeneration tail gas treatment device according to claim 1, characterized in that: the horizontal height position of the volute dust remover is higher than the position of the hot material temporary storage bin, and the horizontal height position of the induced draft fan is higher than the position of the volute dust remover.

3. The asphalt mixture thermal regeneration tail gas treatment device according to claim 1, characterized in that: regeneration drying roller still includes the regenerative burner, the draught fan is including discharging fume draught fan, return air draught fan, transition bellows, the spiral case dust remover is connected to transition bellows, and transition bellows is connected respectively and is discharged fume draught fan, return air draught fan, the draught fan of discharging fume is connected to native combustor, and the return air draught fan is connected to the regenerative burner.

4. The asphalt mixture thermal regeneration tail gas treatment device according to claim 3, characterized in that: still include frequency conversion controller, negative pressure detection device detects regeneration drying drum internal pressure state, frequency conversion controller signal connection draught fan, return air draught fan, negative pressure detection device of discharging fume to draught fan, return air draught fan rotational speed are discharged fume through negative pressure detection device signal conditioning control.

5. The asphalt mixture thermal regeneration tail gas treatment device according to claim 4, characterized in that: the regeneration drying roller further comprises a discharge box, one end of the drying roller is arranged at the discharge box, the discharge port is arranged on the discharge box, the regeneration burner is connected with the discharge box, hot smoke generated by the regeneration burner enters the regeneration drying roller through the discharge box, and the negative pressure detection device is arranged in the discharge box.

6. The asphalt mixture thermal regeneration tail gas treatment device according to claim 4, characterized in that: the regenerative burner is provided with a hearth, a temperature detection device is arranged in the hearth, the return air draught fan is connected to the hearth to burn tail gas, the temperature detection device detects the temperature of the hearth, and the frequency conversion controller is connected with the temperature detection device through signals.

7. The asphalt mixture thermal regeneration tail gas treatment device according to claim 1, characterized in that: the regeneration drying roller further comprises a feed inlet, the feed inlet and the discharge port are respectively arranged at two ends of the regeneration drying roller, the regeneration burner is arranged at one end of the drying roller, which is provided with the discharge port, the regeneration tail gas outlet is arranged at one end of the regeneration drying roller, which is provided with the feed inlet, and the regeneration drying roller adopts a counter-current heating mode.

8. The asphalt mixture thermal regeneration tail gas treatment device according to claim 1, characterized in that: the primary drying drum comprises a primary tail gas outlet, and the primary tail gas outlet is connected with the bag-type dust collector.

9. A method for treating tail gas generated by thermal regeneration of asphalt mixture is characterized by comprising the following steps: comprises the following steps:

step one, heating a regenerated material in a regeneration drying roller, and storing the heated material in a hot material temporary storage bin;

step two, the induced draft fan generates negative pressure on the volute dust collector, the volute dust collector generates suction on a regenerated tail gas outlet to enable tail gas to enter the volute dust collector, powder in the tail gas is separated in the volute dust collector and is sent into a hot material temporary storage bin, the powder entering the hot material temporary storage bin is mixed with the heated material, and the temperature of the powder is increased to be consistent with that of the heated material through heat exchange;

and step three, feeding the tail gas from which the powder is removed into an induced draft fan and conveying the tail gas to a primary combustor of a primary drying roller for combustion treatment.

10. The method for treating the tail gas generated by the hot recycling of the asphalt mixture according to claim 9, which is characterized by comprising the following steps: the induced draft fan comprises a smoke exhaust induced draft fan and a return air induced draft fan, the smoke exhaust induced draft fan is connected to the primary combustor, the return air induced draft fan is connected to the regenerative combustor, the negative pressure detection device detects the pressure state in the regenerative drying roller to detect the efficiency of hot flue gas of the regenerative combustor passing through the regenerative drying roller, and the temperature detection device detects the temperature in the hearth of the regenerative combustor to detect the temperature of the hot flue gas passing through the regenerative drying roller; when the negative pressure detection device detects that the negative pressure value in the regenerative drying roller is insufficient, the rotating speed of the smoke exhaust induced draft fan is increased through the variable frequency controller, and when the negative pressure detection device detects that the negative pressure value in the regenerative drying roller is overlarge, the rotating speed of the smoke exhaust induced draft fan is reduced through the variable frequency controller; when the temperature detection device detects that the temperature of the hearth is too high, the rotating speed of the return air draught fan is increased through the frequency conversion controller, and when the temperature detection device detects that the temperature of the hearth is too low, the rotating speed of the return air draught fan is reduced through the frequency conversion controller.

Technical Field

The invention relates to the technical field of asphalt tail gas treatment equipment, in particular to a device and a method for treating asphalt mixture thermal regeneration tail gas.

Background

A great amount of waste asphalt is generated due to the overhaul and overhaul of the highway every year, and the recycling of the waste asphalt becomes a hot topic. The drying roller is a necessary device in the waste asphalt treatment system, and the drying roller during operation will produce a large amount of tail gas, generally carries out combustion processing in leading tail gas into the combustor through the draught fan, because contain a large amount of farine particles in the tail gas, the farine particle leads to the fact the blade adhesion easily when passing through the draught fan, causes the draught fan to damage, has the potential safety hazard.

In order to solve the problems, the chinese patent with the publication number of CN 206944172U discloses a hot recycling tail gas treatment device for asphalt plant mixing, which comprises a recycling drying roller and a primary drying roller, and is characterized in that: still include flue gas transmission device, flue gas transmission device include flue gas separator, unloading valve, mixing chamber, draught fan, flue gas separator include air intake, air outlet, unloading mouth, the air intake be connected with regeneration drying drum, the air outlet be connected with the draught fan, unloading mouth be connected with the mixing chamber through unloading the valve, the draught fan is blown in by mixing chamber one side, links to each other with primary drying drum rather than relative mixing chamber opposite side. The existing tail gas treatment device reduces fine powder particles from entering the draught fan by arranging the smoke-gas separator, but under the working condition of using more fine aggregates, a large amount of fine aggregates are taken away by tail gas, so that the proportion of the asphalt mixture is changed, the final finished product is greatly different from the expected product, and the quality of the finished product is influenced.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the device and the method for treating the hot recycling tail gas of the asphalt mixture, which have the advantages of stable product-level ratio, high tail gas treatment efficiency and stable equipment operation.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the utility model provides a hot regeneration tail gas processing apparatus of bituminous mixture, includes regeneration drying roller, primary drying roller, regeneration drying roller includes discharge gate, regeneration tail gas export, and primary drying roller includes primary combustor, its characterized in that: still include spiral case dust remover, draught fan, hot material temporary storage storehouse, the spiral case dust remover is connected with regeneration tail gas export, draught fan, hot material temporary storage storehouse respectively, and the draught fan is connected with native combustor, and the discharge gate is connected to hot material temporary storage storehouse, and the draught fan produces the negative pressure to the spiral case dust remover and makes tail gas deliver to the spiral case dust remover in through regeneration tail gas export, and the powder in the tail gas is separated and is sent into hot material temporary storage storehouse in the spiral case dust remover, and remaining tail gas gets into in the draught fan and is delivered to native combustor department burning.

Furthermore, the horizontal height position of the volute dust remover is higher than the position of the hot material temporary storage bin, and the horizontal height position of the induced draft fan is higher than the position of the volute dust remover.

Further, regeneration drying roller still includes the regenerative burner, the draught fan is including discharging fume draught fan, return air draught fan, transition bellows, the spiral case dust remover is connected to transition bellows, and transition bellows is connected respectively and is discharged fume draught fan, return air draught fan, the draught fan of discharging fume is connected to native combustor, and the return air draught fan is connected to the regenerative burner.

Further, still include frequency conversion controller, negative pressure detection device detects regeneration drying drum internal pressure state, frequency conversion controller signal connection draught fan, return air draught fan, negative pressure detection device of discharging fume to draught fan, return air draught fan rotational speed of discharging fume through negative pressure detection device signal conditioning control.

Further, regeneration drying roller still includes the workbin, and drying roller one end is located to the workbin, on the workbin was located to the discharge gate, the regenerative burner was connected with the workbin, and in the hot cigarette that the regenerative burner produced got into regeneration drying roller through the workbin, negative pressure detection device located in the workbin.

Further, the regenerative burner is provided with a hearth, a temperature detection device is arranged in the hearth, the return air draught fan is connected to the hearth to burn tail gas, the temperature detection device detects the temperature of the hearth, and the frequency conversion controller is in signal connection with the temperature detection device.

Further, regeneration drying roller still includes the feed inlet, regeneration drying roller both ends are located respectively to feed inlet and discharge gate, and regeneration combustor locates drying roller and sets up the one end of discharge gate, regeneration tail gas outlet locates regeneration drying roller and sets up the one end of feed inlet, and regeneration drying roller adopts the counter-current heating mode.

Further, the drying device also comprises a bag-type dust collector, the primary drying drum comprises a primary tail gas outlet, and the primary tail gas outlet is connected with the bag-type dust collector.

A method for treating tail gas generated by thermal regeneration of asphalt mixture is characterized by comprising the following steps: comprises the following steps:

step one, heating a regenerated material in a regeneration drying roller, and storing the heated material in a hot material temporary storage bin;

step two, the induced draft fan generates negative pressure on the volute dust collector, the volute dust collector generates suction on a regenerated tail gas outlet to enable tail gas to enter the volute dust collector, powder in the tail gas is separated in the volute dust collector and is sent into a hot material temporary storage bin, the powder entering the hot material temporary storage bin is mixed with the heated material, and the temperature of the powder is increased to be consistent with that of the heated material through heat exchange;

and step three, feeding the tail gas from which the powder is removed into an induced draft fan and conveying the tail gas to a primary combustor of a primary drying roller for combustion treatment.

Further, the induced draft fan comprises a smoke exhaust induced draft fan and a return air induced draft fan, the smoke exhaust induced draft fan is connected to the primary combustor, the return air induced draft fan is connected to the regenerative combustor, the negative pressure detection device detects the pressure state in the regenerative drying roller to detect the efficiency of hot smoke of the regenerative combustor passing through the regenerative drying roller, and the temperature detection device detects the temperature in the hearth of the regenerative combustor to detect the temperature of the hot smoke passing through the regenerative drying roller; when the negative pressure detection device detects that the negative pressure value in the regenerative drying roller is insufficient, the rotating speed of the smoke exhaust induced draft fan is increased through the variable frequency controller, and when the negative pressure detection device detects that the negative pressure value in the regenerative drying roller is overlarge, the rotating speed of the smoke exhaust induced draft fan is reduced through the variable frequency controller; when the temperature detection device detects that the temperature of the hearth is too high, the rotating speed of the return air draught fan is increased through the frequency conversion controller, and when the temperature detection device detects that the temperature of the hearth is too low, the rotating speed of the return air draught fan is reduced through the frequency conversion controller.

According to the description of the invention, compared with the prior art, the device and the method for treating the tail gas generated by thermal regeneration of the asphalt mixture provided by the invention have the advantages that the volute dust remover is arranged to separate powder in the tail gas, so that the failure of an induced draft fan caused by the powder entering the induced draft fan is avoided; the separated powder is sent back to the temporary hot material storage bin to be mixed with the heated reclaimed material and is heated to the temperature all the time in a heat exchange mode, so that the grade of the finished product material is ensured to be unchanged, and the production quality is ensured; the vertical arrangement mode of the volute dust remover, the draught fan and the hot material temporary storage bin fully utilizes the gravity effect, a conveying device is not required to be additionally arranged, and the gas-solid separation effect of the volute dust remover is improved; the tail gas is respectively guided to the primary combustor and the regenerative combustor through the two induced draft fans for treatment, so that the maximum treatment capacity and the treatment efficiency are improved, and the tail gas is ensured to be fully combusted and eliminated; through the adjustment of the rotating speeds of the smoke exhaust draught fan and the air return draught fan, the adaptability adjustment of the working condition of the regenerative drying roller can be realized, and the running stability of the equipment is improved.

Drawings

FIG. 1 is a schematic structural diagram of an asphalt mixture thermal regeneration tail gas treatment device.

The labels in the figure correspond to the following: 1. the device comprises a regenerative drying roller, 11 feed inlets, 12 discharge outlets, 13 regenerative tail gas outlets, 14 regenerative burners, 141 hearth, 15 discharge boxes, 2 primary drying roller, 21 primary burners, 22 primary tail gas outlets, 3 volute dust collectors, 4 induced draft fans, 41 smoke exhaust induced draft fans, 42 return air induced draft fans, 43 transition air boxes, 5 hot material temporary storage bins, 6 variable frequency controllers, 7 negative pressure detection devices, 8 temperature detection devices and 9 bag dust collectors.

Detailed Description

The invention is further described below by means of specific embodiments.

Referring to fig. 1, the asphalt mixture thermal regeneration tail gas treatment device comprises a regeneration drying roller 1, a primary drying roller 2, a volute dust remover 3, an induced draft fan 4, a hot material temporary storage bin 5, a variable frequency controller 6, a negative pressure detection device 7, a temperature detection device 8 and a bag-type dust remover 9.

The regeneration drying roller 1 comprises a feeding hole 11, a discharging hole 12, a regeneration tail gas outlet 13, a regeneration burner 14 and a discharging box 15. The 1 both ends of regeneration drying roller are located respectively to feed inlet 11 and ejection of compact case 15, discharge gate 12 is located on ejection of compact case 15, discharge gate 12 is connected to hot material temporary storage storehouse 5, the one end that drying roller 1 set up discharge gate 12 is located to regenerative burner 14, regenerative burner 14 is connected with ejection of compact case 15, the hot cigarette that regenerative burner 14 produced gets into regeneration drying roller 1 through ejection of compact case 15 in, regeneration tail gas export 13 is located regeneration drying roller 1 and is set up the one end of feed inlet 11, this regeneration drying roller 1 is the countercurrent heating mode.

The primary drying drum 2 comprises a primary burner 21 and a primary tail gas outlet 22, and the primary tail gas outlet 22 is connected to the bag-type dust collector 9.

The volute dust remover 3 is respectively connected with the regenerated tail gas outlet 13, the draught fan 4, the hot material temporary storage bin 5, the draught fan 4 comprises a smoke exhaust draught fan 41, a return air draught fan 42, a transition air box 43, the volute dust remover 3 is connected to the transition air box 43, the transition air box 43 is respectively connected with the smoke exhaust draught fan 41, the return air draught fan 42, the smoke exhaust draught fan 41 is connected to the primary combustor 21, the return air draught fan 42 is connected to the regenerative combustor 14, the horizontal height position of the volute dust remover 3 is higher than the position of the hot material temporary storage bin 5, the horizontal height position of the draught fan 4 is higher than the position of the volute dust remover 3, the arrangement mode fully utilizes the action of gravity, the light tail gas easily rises to enter the draught fan 4, the heavy powder easily falls to enter the hot material temporary storage bin 5. The induced draft fan generates negative pressure on the volute dust collector 3 to enable tail gas to be sent into the volute dust collector 3 through the regeneration tail gas outlet 13, powder in the tail gas is separated in the volute dust collector 3 and sent into the hot material temporary storage bin 5, and the rest tail gas enters the transition air box 43 and is sent to the primary combustor 21 and the regeneration combustor 14 through the smoke exhaust induced draft fan 41 and the return air induced draft fan 43 respectively to be combusted. The amount of tail gas which can be burned and treated by a group of burners is limited, if all the tail gas is introduced into the primary burner 21 for treatment, under the condition of large treatment flow, the treatment efficiency of the tail gas is reduced, and the tail gas is difficult to be completely burned and treated, so that part of the tail gas is introduced into the regenerative burner 14 for treatment to reduce the workload of the primary burner 21, improve the tail gas treatment efficiency and increase the maximum treatment capacity.

Negative pressure detection device 7 locates in ejection of compact case 15, detect the pressure state in regeneration drying roller 1, regenerative burner 14 is equipped with furnace 141, temperature-detecting device 8 locates in furnace 141, frequency conversion controller 6 signal connection draught fan 41 of discharging fume, return air draught fan 42, negative pressure detection device 7, temperature-detecting device 8, and through negative pressure detection device 7, temperature-detecting device 8's signal conditioning coordinated control draught fan 41 of discharging fume, the rotational speed of return air draught fan 42, through draught fan 41 of discharging fume, return air draught fan 42 rotational speed adjustment, can realize carrying out the adaptability adjustment to the operating mode of regeneration drying roller 1, improve equipment operating stability.

The method for treating the regeneration tail gas of the asphalt mixture comprises the following steps:

firstly, a reclaimed material enters a regenerative drying roller 1 through a feeding hole 11, the reclaimed material gradually moves towards a discharging hole 12 along with the rotation of the regenerative drying roller 1, a regenerative burner 14 generates hot flue gas, the hot flue gas passes through the regenerative drying roller 14 and is sent out from a regenerative tail gas outlet 13 at the other end, the hot flue gas and the reclaimed material heat the reclaimed material in a heat exchange mode, namely a countercurrent heating mode, and the heated reclaimed material is sent out from the discharging hole 12 and enters a hot material temporary storage bin 5 for storage;

secondly, because the regeneration tail gas outlet 13 and the feed inlet 11 are positioned at the same end of the regeneration drying roller 1, fine powder particles and other powder materials are mixed in the regeneration tail gas, the induced draft fan 4 generates negative pressure on the volute dust collector 3, the volute dust collector 3 generates suction on the regeneration tail gas outlet 13 to enable the tail gas to enter the volute dust collector 3, the powder materials in the tail gas are separated in the volute dust collector 3 and are sent to the hot material temporary storage bin 5, the powder materials entering the hot material temporary storage bin 5 are mixed with the heated materials, and the temperature of the powder materials is increased to be consistent with the heated materials through heat exchange;

step three, removing powder tail gas, feeding the powder tail gas into a transition air box 43, feeding a part of the powder tail gas into a primary combustor 21 through a smoke exhaust induced draft fan 41 for combustion treatment, feeding a part of the powder tail gas into a regenerative combustor 14 through a return air induced draft fan 42 for combustion treatment, and feeding the tail gas generated by a primary drying roller 2 to a bag-type dust collector 9 through a primary tail gas outlet 22 for treatment and then discharging;

under the actual working condition, the influence of working environment change, material state change and the like exists, and the production working condition can generate certain fluctuation, so that the equipment is required to carry out automatic adaptability adjustment. The negative pressure detection device 7 detects the pressure state in the discharge box 15 of the regenerative drying roller 1 to detect the efficiency of hot flue gas of the regenerative burner 14 passing through the regenerative drying roller 1, when the negative pressure detection device 7 detects that the negative pressure value in the regenerative drying roller 1 is insufficient, the rotating speed of the smoke exhaust induced draft fan 41 is increased through the variable frequency controller 6, when the negative pressure detection device 7 detects that the negative pressure value in the regenerative drying roller 1 is too large, the rotating speed of the smoke exhaust induced draft fan 41 is reduced through the variable frequency controller 6, and the pressure state of the regenerative drying roller 1 is stabilized; temperature-detecting device 8 detects the temperature of 14 furnace 141 interior temperatures in order to detect through regeneration drying roller 1 hot flue gas of regenerative burner, when temperature-detecting device 8 detected furnace 141 high temperature, through inverter controller 6 rising return air draught fan 42 rotational speed, when temperature-detecting device 8 detected furnace 141 low temperature, through inverter controller 6 reduction return air draught fan 42 rotational speed, and then stable regeneration drying roller 1 hot flue gas temperature state.

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.