CN212456894U - Thermal regeneration tail gas treatment system of asphalt mixing plant and mixing plant - Google Patents

Abstract

The utility model provides a bituminous mixing plant thermal regeneration tail gas processing system and mixing plant, wherein, bituminous mixing plant thermal regeneration tail gas processing system includes: the regenerator comprises a regenerator drying device and a regenerator burner, wherein the regenerator burner is connected with one end of the regenerator drying device; the primary dryer comprises a primary dryer drying device and a primary dryer combustor, wherein the primary dryer combustor is connected with the primary dryer drying device; the inlet end of the induced draft fan is connected with the other end of the regenerator drying device; the one end of first flue and second flue, the one end of first flue and the one end of second flue all are connected with the exit end of draught fan, and wherein, the other end of first flue is connected with the air inlet end of regenerating machine combustor, and the other end of second flue is connected with the air inlet end of primary machine combustor. Through the technical scheme of the utility model, promoted the combustion rate of regenerating machine tail gas effectively, reduced the exhaust emissions, promoted the environmental protection performance of equipment, still reduced the whole energy consumption of equipment, simplified the structure of equipment.

Description

Thermal regeneration tail gas treatment system of asphalt mixing plant and mixing plant

Technical Field

The utility model relates to a pitch production facility technical field particularly, relates to a hot regeneration tail gas processing system of bituminous mixing plant and a mixing plant.

Background

A large amount of waste gas, also called tail gas, can be produced in the thermal regeneration heating process of the asphalt mixing plant, and the waste gas is generally directly discharged into the front end of a dust removal system of the asphalt mixing plant, mixed with asphalt smoke through dust, and then discharged into the atmosphere after being filtered by a cloth bag. Such simple structure, but harmful substance is not handled, and in the later stage of production, the pitch cigarette still can volatilize from retrieving the powder to pitch oil smoke in the tail gas glues easily and leads to the sack permeability to worsen on the sack, influences sack life.

Some current continuous type compulsory stirring bituminous mixture production facility, its tail gas processing apparatus divide into two branches, first branch road: the waste gas from the input end of the regenerator drying device passes through a first induced draft fan and then reaches the output end of the regenerator drying device; the second branch is as follows: the waste gas chamber at the input end of the regenerator drying device passes through a second induced draft fan and then reaches the output end of the primary dryer drying device; by adopting the equipment, the asphalt smoke dust in the tail gas is easy to adhere to pipelines and a draught fan to cause blockage, and only a small part of the asphalt smoke dust in the tail gas participates in combustion, so that the treatment effect is poor; in addition, two branches need two induced draft fans, so that the whole power consumption is large, energy is not saved, and the structure is complex.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to at least one of the problems of the prior art or the related art.

In view of this, an object of the present invention is to provide a thermal regeneration tail gas treatment system for asphalt mixing plant.

Another object of the utility model is to provide a mixing station.

In order to achieve the above object, the utility model discloses technical scheme of the first aspect provides a hot regeneration tail gas treatment system of bituminous mixing plant for the mixing plant, include: the regenerator comprises a regenerator drying device and a regenerator burner, wherein the regenerator burner is connected with one end of the regenerator drying device; the primary dryer comprises a primary dryer drying device and a primary dryer combustor, wherein the primary dryer combustor is connected with the primary dryer drying device; the inlet end of the induced draft fan is connected with the other end of the regenerator drying device; the one end of first flue and second flue, the one end of first flue and the one end of second flue all are connected with the exit end of draught fan, and the other end of first flue is connected with the air inlet end of regenerating machine combustor, and the other end of second flue is connected with the air inlet end of primary combustion engine combustor.

In the technical scheme, the two flues are respectively connected with the regenerator burner and the primary machine burner, so that the waste gas discharged from the regenerator drying device can be combusted again, more combustible substances in the waste gas can be combusted, the incineration degradation efficiency of the waste gas is improved, the pollution is reduced, the environmental protection effect of equipment is improved, the tail gas of the regenerator drying device has a certain oxygen content, the tail gas is sent into the regenerator burner and the primary machine burner through the air inlet end to be used as combustion-supporting air to be combusted together with fresh air, the consumption of the fresh air is reduced, and the tail gas is combusted again, so that the quantity of the tail gas finally discharged is reduced, and the effects of saving energy and reducing consumption are further achieved; in addition, only one induced draft fan is arranged in the technical scheme, and compared with the prior art, one induced draft fan is reduced, the number of parts is reduced, the structure is simplified, and the energy consumption is reduced.

Specifically, the regenerator drying device is used for providing a drying space for the regenerated materials, and the regenerator burner is connected with the regenerator drying device and can dry the regenerated materials in the regenerator drying device through high temperature generated by combustion; similarly, the primary machine drying device is used for providing a drying space for the raw materials, and the primary machine burner is connected with the primary machine drying device and can dry the raw materials in the primary machine drying device through high temperature generated by combustion; the draught fan is arranged, so that the gas in the regenerator drying device can be guided to flow conveniently, on one hand, moisture can be taken away through the flow of the gas, the drying efficiency is improved, on the other hand, the cooled gas in the regenerator drying device can be guided to flow out, so that the fresh and high-temperature gas flows in, and the high temperature in the regenerator drying device can be kept; the regenerator burner is arranged at one end of the regenerator drying device, and the induced draft fan is arranged at the other end of the regenerator drying device, so that the ventilation in the regenerator drying device is ensured; through setting up first flue and second flue, be convenient for with waste gas to regenerator combustor and primary machine combustor reposition of redundant personnel, burn once more waste gas, promote the degradation rate of waste gas, can also reduce fresh air's consumption, lifting means's environmental protection effect.

It should also be pointed out that, when the regenerator combustor and the primary combustor work and burn, negative pressure is generated due to air consumption, and the self plays a role of air suction, thereby being beneficial to reducing the power of the induced draft fan and playing a certain energy-saving effect.

In the above technical solution, the thermal regeneration tail gas treatment system of the asphalt mixing plant further comprises: the air door is arranged in the first flue and/or the second flue, and the opening degree of the air door is adjustable; and/or a first blower arranged on the regenerator burner; and the second air blower is arranged on the combustor of the primary machine.

In any one of the above technical solutions, the thermal regeneration tail gas treatment system of the asphalt mixing plant further includes: and the dust removal device is arranged between the regenerator drying device and the draught fan, and the regenerator drying device is connected with the draught fan through the dust removal device.

In the technical scheme, the dust removal device comprises a dust removal box and a cyclone dust collector, and the cyclone dust collector is arranged in the dust removal box.

In any one of the above technical solutions, the thermal regeneration tail gas treatment system of the asphalt mixing plant further includes: the hearth is connected with the regenerator burner and is used for providing a combustion space of fuel; and one end of the third flue is connected with the hearth, and the other end of the third flue is connected with the regenerating machine drying device.

In any one of the above technical solutions, the thermal regeneration tail gas treatment system of the asphalt mixing plant further includes: go out the workbin for receive the reworked material after drying, go out the workbin and locate the exit end of reworker drying device with draught fan or reworker combustor.

In any one of the above technical solutions, the thermal regeneration tail gas treatment system of the asphalt mixing plant further includes: the air inlet device is provided with a first air inlet, a second air inlet and an air outlet; air inlet devices are respectively arranged on the regenerator burner and the primary combustor; a first air inlet of an air inlet device on the regenerator burner is connected with the first flue, and an air outlet of the air inlet device on the regenerator burner is connected with the regenerator drying device; a first air inlet of an air inlet device on the combustor of the primary machine is connected with the second flue, and an air outlet of the air inlet device on the combustor of the primary machine is connected with a drying device of the primary machine.

In the above technical scheme, the air intake device comprises a first air pipe and a second air pipe which are communicated with each other; one end of the first air pipe is inserted into the second air pipe, the other end of the first air pipe is provided with a first air inlet, one end of the second air pipe is provided with a second air inlet, and the other end of the second air pipe is provided with an air outlet; the first air pipe is a straight pipe or one end of the first air pipe inserted into the second air pipe is bent towards the air outlet.

In the above technical solution, the air intake device includes a first air duct, a second air duct and a third air duct which are communicated with each other; the first air pipe and the second air pipe are respectively connected with the third air pipe, the first air inlet is arranged on the first air pipe, the second air inlet is arranged on the second air pipe, and the air outlet is arranged on the third air pipe.

The utility model discloses technical scheme of second aspect provides a stirring station, include: the feeding device is used for conveying reclaimed materials; in the asphalt mixing plant thermal regeneration tail gas treatment system according to any one of the above technical solutions in the first aspect, the reclaimed material drying device of the asphalt mixing plant thermal regeneration tail gas treatment system is connected with the feeding device.

In this technical scheme, through adopting the hot regeneration tail gas processing system of asphalt mixing plant of any one above-mentioned technical scheme to have above-mentioned technical scheme's whole beneficial effect, no longer describe herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural view of a thermal regeneration tail gas treatment system of an asphalt mixing plant according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a thermal regeneration tail gas treatment system of an asphalt mixing plant according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a thermal regeneration tail gas treatment system of an asphalt mixing plant according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of an air intake device according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of an air intake device according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of an air intake device according to an embodiment of the present invention;

fig. 7 is a schematic cross-sectional structure view of an air intake device according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 7 is:

100 regenerator drying device, 102 regenerator burner, 104 first blower, 106 waste gas chamber, 108 dust removal box, 110 induced draft fan, 112 first flue, 114 air door, 116 third flue, 118 hearth, 120 discharge box, 200 primary machine drying device, 202 primary machine burner, 204 second blower, 212 second flue, 300 air inlet device, 302 first air pipe, 304 first air inlet, 306 second air pipe, 308 second air inlet, 310 air outlet, 312 third air pipe, 314 flange.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Some embodiments of the present invention are described below with reference to fig. 1 to 7.

As shown in fig. 1, the thermal regeneration tail gas treatment system of asphalt mixing plant according to the utility model provides an embodiment for the mixing plant, include: the primary dryer comprises a regenerator drying device 100, a regenerator burner 102, a primary dryer drying device 200, a primary dryer burner 202, an induced draft fan 110, a first flue 112 and a second flue 212.

Specifically, the native machine burner 202 is connected with the native machine drying device 200; the regenerator burner 102 is connected to one end of the regenerator drying apparatus 100; the inlet end of the induced draft fan 110 is connected with the other end of the regenerator drying device 100, the outlet end of the induced draft fan 110 is connected with one end of the first flue 112, the outlet end of the induced draft fan 110 is also connected with one end of the second flue 212, the other end of the first flue 112 is connected with the air inlet end of the regenerator burner 102, and the other end of the second flue 212 is connected with the air inlet end of the primary combustor 202.

In this embodiment, the first flue 112 is connected to the air inlet end of the regenerator burner 102, and the second flue 212 is connected to the air inlet end of the combustor 202, so that the waste gas from the regenerator drying device 100 can be combusted again, which is beneficial to performing combustion treatment on more combustible substances in the waste gas, improving the incineration degradation efficiency of the waste gas, reducing pollution, and improving the environmental protection effect of the equipment; in addition, the waste gas of the regenerator drying device 100 also has a certain oxygen content, and the waste gas is sent into the regenerator burner 102 and the primary combustor 202 through the air inlet end, and can be used as combustion-supporting air to be combusted together with fresh air, so that the consumption of the fresh air is reduced, and the tail gas is combusted again, so that the quantity of the tail gas finally discharged is reduced, and the effects of energy conservation and consumption reduction are further achieved.

It should be further noted that only one induced draft fan 110 is provided in this embodiment, and compared with the prior art, one induced draft fan 110 is reduced, the number of components is reduced, which is beneficial to simplifying the structure and reducing the energy consumption.

Furthermore, the regenerator burner 102 is provided with a first air blower 104, and the primary combustor 202 is provided with a second air blower 204, so that air can be sucked into the regenerator burner 102 through the first air blower 104 to further improve the combustion efficiency in the regenerator burner 102, and air can be sucked into the primary combustor 202 through the second air blower 204 to further improve the combustion efficiency in the primary combustor 202; and the arrangement of the first air blower 104 and the second air blower 204 is also beneficial to assisting the induced draft fan 110 to suck air from the regenerator drying device 100, and reducing the full pressure of the induced draft fan 110, thereby reducing the power of the induced draft fan 110 and further realizing the purpose of energy conservation.

In the above embodiment, the asphalt mixing plant thermal regeneration tail gas treatment system further includes: and the damper 114 is arranged in the first flue 112, and the opening degree of the damper 114 is adjustable so as to adjust the distribution ratio of the exhaust gas between the regenerator burner 102 and the combustor 202, thereby improving the flexibility of the equipment.

In other embodiments, damper 114 may also be disposed within second chimney 212, or damper 114 may be disposed within both first chimney 112 and second chimney 212.

In any one of the above embodiments, the thermal regeneration tail gas treatment system of the asphalt mixing plant further comprises a dust removal device, which is arranged between the regenerator drying device 100 and the induced draft fan 110, wherein the regenerator drying device 100 is connected with the induced draft fan 110 through the dust removal device to remove dust in the waste gas, reduce the phenomenon that dust adheres to the pipeline and the induced draft fan 110 to cause blockage, and improve the waste gas discharge efficiency.

Furthermore, the dust removal device comprises a dust removal box 108 and a cyclone dust collector, the cyclone dust collector is arranged in the dust removal box 108, and the cyclone dust collector is adopted, so that large particle dust which is easy to adhere to waste gas can be filtered, the blockage can be further reduced, and the service life of each part in the equipment can be prolonged; the dust box 108 can accommodate a cyclone dust collector on one hand and prevent waste gas or dust from overflowing.

In other embodiments, the dust removing device is not limited to a cyclone dust remover, and may be any one or more of an inert dust remover, a spray tower, a scrubber, an impact dust remover, a particle layer dust remover, a bag dust remover and an electric dust remover.

As shown in fig. 1, in some embodiments, an off-gas chamber 106 is further provided between the cyclone and the regenerator drying apparatus 100 to collect off-gas.

It is understood that the regenerator drying apparatus 100 and the regenerator burner 102 may be directly coupled together or may be separated from each other and coupled together by a flue or the like.

In any of the above embodiments, as shown in fig. 2, the asphalt mixing plant thermal regeneration tail gas treatment system further comprises: the furnace 118 and the third flue 116, and the regenerator drying unit 100 and the regenerator burner 102 are connected through the furnace 118 and the third flue 116.

Specifically, the hearth 118 is connected with the regenerator burner 102, and the hearth 118 is used for providing a combustion space for fuel, so that when the fuel is combusted, flame does not directly contact with the regenerated material in the regenerator drying device 100, and the regenerated material is prevented from being melted; one end of the third flue 116 is connected with the furnace 118, and the other end of the third flue 116 is connected with the regenerator drying device 100, so that the regenerator burner 102 and the regenerator drying device 100 can keep a certain distance, rather than being directly connected together, especially the third flue 116 is arranged, so that the relative position arrangement of the regenerator burner 102 and the regenerator drying device 100 can be more flexible, the arrangement can be carried out in the horizontal direction, the vertical direction or the inclined direction, and the distance between the two can also be flexibly adjusted, thereby being beneficial to the flexible layout of other parts of the thermal regeneration tail gas treatment system of the asphalt mixing plant; the flexible arrangement of the direction of the hearth 118 is also facilitated, so that the hearth 118 can be arranged horizontally or vertically.

It will be appreciated that the third flue 116 feeds the high temperature air heated by the regenerator burner 102 to the regenerator drying apparatus 100 for drying the reclaimed material.

In any of the above embodiments, the positions of the induced draft fan 110 and the regenerator drying apparatus 100 may be interchanged, so that the flow direction of the tail gas is opposite to or the same as the flow direction of the regenerated material, that is, the induced draft fan 110 may be disposed at the inlet end of the regenerator drying apparatus 100, or may be disposed at the inlet end of the regenerator drying apparatus 100.

Specifically, as shown in fig. 2, the thermal regeneration tail gas treatment system of the asphalt mixing plant further includes: a discharge box 120, disposed at an outlet end of the regenerator drying apparatus 100, for receiving the dried regenerated material; the induced draft fan 110 is connected with the outlet end of the regenerator drying device 100 through the discharge box 120 and the dust removal box 108, the regenerator burner 102 is connected with the inlet end of the regenerator drying device 100 through the hearth 118 and the third flue 116, and the flow direction of the regenerated material is the same as the flow direction of the tail gas.

As shown in fig. 3, unlike the embodiment shown in fig. 2, the induced draft fan 110 is disposed at the inlet end of the regenerator drying device 100, that is, the induced draft fan 110 is connected to the outlet end of the regenerator drying device 100 through the dust removing box 108, the regenerator burner 102 is connected to the outlet end of the regenerator drying device 100 through the furnace 118 and the third flue 116, the discharging box 120 is disposed at the outlet end of the regenerator drying device 100, and the flow direction of the regenerated material is opposite to the flow direction of the tail gas.

As shown in fig. 4, in any of the above embodiments, the thermal regeneration tail gas treatment system of the asphalt mixing plant further includes: an air intake device 300 having a first air intake opening 304, a second air intake opening 308 and an air outlet opening 310; the regenerator burner 102 and the raw engine burner 202 are respectively provided with an air intake device 300; a first air inlet 304 of the air inlet device 300 on the regenerator burner 102 is connected with the first flue 112, and an air outlet 310 of the air inlet device 300 on the regenerator burner 102 is connected with the regenerator drying device 100; the first air inlet 304 of the air intake device 300 on the combustor 202 is connected with the second flue 212, and the air outlet 310 of the air intake device 300 on the combustor 202 is connected with the dryer 200.

In this embodiment, by providing the air intake device 300, and the air intake device 300 has the first air intake 304, the second air intake 308, and the air outlet 310, it is convenient to introduce the tail gas through the first air intake 304 for combustion supporting, and simultaneously introduce the fresh air through the second air intake 308, so as to ensure that there is a sufficient oxygen supply in the regenerator burner 102 and the raw engine burner 202, and the air outlet 310 can introduce the mixed exhaust gas and the fresh air into the regenerator burner 102 or the raw engine burner 202 together, and the air intake device 300 has a simple structure and is easy to produce and assemble.

As shown in fig. 4, in the above embodiment, the air intake device 300 includes a first air duct 302 and a second air duct 306 which are communicated with each other; one end of the first air duct 302 is inserted into the second air duct 306, and the other end of the first air duct 302 is provided with a first air inlet 304, one end of the second air duct 306 is provided with a second air inlet 308, and the other end of the second air duct 306 is provided with an air outlet 310; the end of the first air duct 302 inserted into the second air duct 306 is bent toward the air outlet 310.

In this embodiment, the air intake device 300 includes a first air duct 302 and a second air duct 306, one end of the first air duct 302 is inserted into the second air duct 306 from the circumferential surface of the second air duct 306 in the radial direction, and the other end of the first air duct 302 is provided with a first air inlet 304, so that the exhaust gas can directly enter the position of the second air duct 306 at the center through the end of the first air duct 302 inserted into the second air duct 306, and thus can be easily mixed with the fresh air entering from the second air inlet 308, and then is sent into the regenerator burner 102 or the protozoan burner 202 through the air outlet 310; one end of the first air pipe 302 inserted into the second air pipe 306 is bent towards the air outlet 310, which is beneficial for the waste gas or the tail gas to approach the air outlet 310, and the flow direction of the waste gas is consistent with the flow direction of the fresh air entering from the second air inlet, so that the waste gas or the tail gas can flow towards the air outlet 310 more easily, and the flow resistance to the fresh air is reduced.

It can be understood that the bending manner of the first air duct 302 can be an arc bending as shown in fig. 4, that is, the bending position is an arc; alternatively, as shown in fig. 5, the pipe wall may be polygonal bent, or the bent pipe wall may have multiple sides of a polygon.

As shown in fig. 6, in other embodiments, the first air duct 302 is a straight duct, and the second air duct 306 is inserted into the second air duct 306 from the circumferential surface of the second air duct 306 along the radial direction, and the opening of the end of the first air duct 302 inserted into the second air duct 306 is set as an oblique opening and faces the air outlet 310, so that the exhaust gas can flow to the air outlet 310.

In other embodiments, as shown in FIG. 7, the air intake assembly 300 includes a first air duct 302, a second air duct 306, and a third air duct 312 that are in communication with one another; the first air duct 302 and the second air duct 306 are respectively connected to the third air duct 312, and the first air duct 302 is connected to the circumferential surface of the second air duct 306 and arranged along the radial direction of the second air duct 306; the first air inlet 304 is disposed on the first air duct 302, the second air inlet 308 is disposed on the second air duct 306, the third air duct 312 is disposed with the air outlet 310, and the second air duct 306 and the third air duct 312 are coaxially disposed, so that the axes of the second air inlet 308 and the air outlet 310 are on the same straight line, which is convenient for reducing the resistance of air flow, and further, the second air duct 306 is inserted into the third air duct 312.

In this embodiment, the first air inlet 304, the second air inlet 308, and the air outlet 310 are respectively disposed on three air ducts, so that the structure is simple and the division of labor is clear.

In any of the above embodiments, the first inlet opening 304, the second inlet opening 308, and the outlet opening 310 of the air intake device 300 are provided with flanges 314, so as to facilitate connection of the air intake device 300 with other components.

An embodiment of the second aspect of the present invention provides a mixing station, including: the feeding device is used for conveying reclaimed materials; in the asphalt mixing plant thermal regeneration tail gas treatment system of any embodiment of the first aspect, the reclaimed material drying device and the feeding device of the asphalt mixing plant thermal regeneration tail gas treatment system are connected.

In this embodiment, by using the thermal regeneration tail gas treatment system of the asphalt mixing plant of any one of the above embodiments, the overall beneficial effects of the above embodiments are achieved, and are not described in detail herein.

According to the asphalt mixing plant thermal regeneration tail gas treatment system of one specific embodiment that this application provided, can improve following problem:

1) the asphalt dust in the tail gas adheres to pipelines and the draught fan 110 to cause the problem of blockage;

2) the combustion efficiency of asphalt smoke dust in the tail gas of the regenerating machine is high;

3) the energy conservation problem of the tail gas conveying process of the regenerating machine.

The technical scheme adopted by the specific embodiment is as follows:

1) a cyclone dust collector is arranged between the waste gas chamber 106 and the induced draft fan 110 to filter large particle dust which is easy to adhere;

2) respectively conveying the regenerator tail gas to the air inlets of the primary combustor 202 and the regenerator combustor 102, mixing the regenerator tail gas with combustion-supporting air, and then conveying the mixture into the flame center, so that the asphalt smoke dust is incinerated and degraded to the maximum extent;

3) the thermal regeneration tail gas treatment system of the asphalt mixing plant adopts an induced draft fan 110, the outlet side of the induced draft fan 110 is divided into two branches, and the two branches are respectively connected to the air inlets of the primary combustor 202 and the regenerator combustor 102. An air door 114 is arranged on a connecting pipeline of a branch of the induced draft fan 110-the regenerator burner 102, and is used for air distribution control of two branches. Besides the draught fan 110, the tail gas of the regenerator is conveyed, and the full pressure of the draught fan 110 and the power are reduced by means of the suction capacity of the combustor blower. The tail gas of the regenerator usually has 10 percent of oxygen content, and can be used as combustion-supporting air of a combustor, so that the consumption of fresh air is reduced. For the regenerator drying apparatus 100, the total amount of fresh air + return tail gas input is minimal, and the total amount of tail gas output is also minimal.

The specific implementation mode is as follows:

as shown in fig. 1, the thermal regeneration tail gas treatment system of the asphalt mixing plant of the regenerator comprises: the regenerator drying apparatus 100, the waste gas chamber 106, the cyclone dust box 108, the induced draft fan 110, the damper 114, the first flue 112, the regenerator burner 102, the second flue 212, the primary combustor 202, and the primary combustor drying apparatus 200. The exhaust gas generated by the regenerator drying apparatus 100 is collected in the exhaust chamber 106 and connected to the cyclone box 108, and the cyclone box 108 is used to filter out large particle dust by a cyclone. The outlet end of the cyclone dust box 108 is connected with the inlet end of the induced draft fan 110. The outlet end of the induced draft fan 110 is connected with the flue. The flue is divided into two branches, a first flue 112 and a second flue 212.

The first chimney 112 is connected to the air intake 300 of the regenerator burner 102 and the second chimney 212 is connected to the air intake 300 of the protozoan burner 202. Damper 114 is provided in first flue 112 for two branch exhaust distribution control.

The air intake device 300 of the primary combustor 202/the secondary combustor 102 is a three-way structure, as shown in fig. 4, and includes a first air duct 302, a second air duct 306, and a flange 314, wherein the first air duct 302 extends into the second air duct 306, and extends for a distance toward the air outlet 310 after being turned by a 90-degree arc elbow, and the extending section is kept concentric with the second air duct 306. The three ports are respectively a first air inlet 304, a second air inlet 308 and an air outlet 310, the first air inlet 304 is used as a tail gas input port, the second air inlet 308 is used as a fresh air input port, and the air outlet 310 is connected to the inlets of the first blower 104 or the second blower 204. The flange 314 of the intake device 300 is used for connection with other devices.

The specific embodiment has the following advantages:

1) the cyclone dust collector is arranged, so that large particle dust which is easy to adhere can be filtered, and the blockage phenomenon of a pipeline and a fan is reduced;

2) the tail gas of the regenerating machine is respectively conveyed to the air inlets of the combustor of the primary machine and the regenerating machine, and is mixed with fresh air and then is conveyed to the center of flame, so that the asphalt smoke dust in the tail gas is incinerated and degraded to the maximum extent, and the environment-friendly effect is better;

3) besides relying on the induced draft fan, the tail gas of the regenerator is conveyed by means of the suction capacity of the combustor blower, so that the total pressure of the induced draft fan can be reduced, and the power is reduced. The tail gas of the regenerator usually has 10 percent of oxygen content, and can be used as combustion-supporting air of a combustor, so that the consumption of fresh air is reduced. For the drying device of the regenerator, the total amount of the input fresh air and the reflux tail gas is minimum, and the total amount of the output tail gas is also minimum. The whole power consumption of the thermal regeneration tail gas treatment system of the regenerated asphalt mixing plant is minimum.

As shown in fig. 1, the regenerator burner 102 is in an integrated arrangement with the regenerator drying apparatus 100; as shown in fig. 2 and 3, the regenerator burner 102 and the regenerator drying apparatus 100 may also take the form of a separate arrangement. Specifically, the regenerator burner 102 completes combustion in the furnace 118, and the generated high-temperature tail gas is connected to the regenerator drying device 100 through the third flue 116, and the regenerated asphalt material is heated and dried through the high-temperature tail gas. The furnace 118 can be arranged horizontally and vertically. Fig. 2 and 3 are schematic diagrams of the arrangement of the regenerator burner 102 separated from the regenerator drying apparatus 100.

It should be further noted that the regenerator burner 102 and the regenerator drying apparatus 100 are separated from each other, and may be applied not only to a forward flow type regenerator but also to a reverse flow type regenerator.

As shown in fig. 2, in the drying device of the forward flow type regenerator, the flow scheme of the regenerated asphalt material is consistent with the flow direction of the high-temperature tail gas; fig. 3 is a schematic structure of a counter-flow regenerator, and as shown in fig. 3, in a drying device of the counter-flow regenerator, the flow direction of the regenerated asphalt material is opposite to the flow direction of the high-temperature tail gas.

Above combine the figure to describe in detail the technical scheme of the utility model, through the utility model discloses a technical scheme has promoted the combustion rate of regenerator tail gas effectively, has reduced the exhaust emissions volume, has promoted the feature of environmental protection of equipment, has still reduced the whole energy consumption of equipment, has simplified the structure of equipment.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a hot regeneration tail gas processing system of bituminous mixing plant which characterized in that includes:

the device comprises a regenerator drying device (100) and a regenerator burner (102), wherein the regenerator burner (102) is connected with one end of the regenerator drying device (100);

the primary dryer comprises a primary dryer drying device (200) and a primary dryer burner (202), wherein the primary dryer burner (202) is connected with the primary dryer drying device (200);

the inlet end of the induced draft fan (110) is connected with the other end of the regenerator drying device (100);

first flue (112) and second flue (212), the one end of first flue (112) with the one end of second flue (212) all with the exit end of draught fan (110) is connected, the other end of first flue (112) with the air inlet end of regenerating machine combustor (102) is connected, the other end of second flue (212) with the air inlet end of former machine combustor (202) is connected.

2. The asphalt mixing plant thermal regeneration tail gas treatment system according to claim 1, further comprising:

the damper (114) is arranged in the first flue (112) and/or the second flue (212), and the opening degree of the damper (114) is adjustable; and/or

A first blower (104) disposed on the regenerator burner (102);

and a second blower (204) provided to the combustor (202) of the primary generator.

3. The asphalt mixing plant thermal regeneration tail gas treatment system according to claim 1 or 2, further comprising:

the dust removal device is arranged between the regenerator drying device (100) and the draught fan (110), and the regenerator drying device (100) is connected with the draught fan (110) through the dust removal device.

4. The asphalt mixing plant thermal regeneration tail gas treatment system according to claim 3,

the dust removal device comprises a dust removal box (108) and a cyclone dust collector, and the cyclone dust collector is arranged in the dust removal box (108).

5. The asphalt mixing plant thermal regeneration tail gas treatment system according to claim 1 or 2, further comprising:

a furnace (118) connected to the regenerator burner (102);

and one end of the third flue (116) is connected with the hearth (118), and the other end of the third flue (116) is connected with the regenerator drying device (100).

6. The asphalt mixing plant thermal regeneration tail gas treatment system according to claim 1 or 2, further comprising:

the discharging box (120) is used for receiving the dried regenerated materials, and the discharging box (120) is connected with the induced draft fan (110) or the regenerator burner (102) arranged at the outlet end of the regenerator drying device (100).

7. The asphalt mixing plant thermal regeneration tail gas treatment system according to claim 1 or 2, further comprising:

the air inlet device (300) is provided with a first air inlet (304), a second air inlet (308) and an air outlet (310);

the regenerator burner (102) and the primary burner (202) are respectively provided with the air inlet device (300);

a first air inlet (304) of the air inlet device (300) on the regenerator burner (102) is connected with the first flue (112), and an air outlet (310) of the air inlet device (300) on the regenerator burner (102) is connected with the regenerator drying device (100);

a first air inlet (304) of the air inlet device (300) on the primary combustor (202) is connected with the second flue (212), and an air outlet (310) of the air inlet device (300) on the primary combustor (202) is connected with the primary dryer drying device (200).

8. The asphalt mixing plant thermal regeneration tail gas treatment system according to claim 7,

the air inlet device (300) comprises a first air pipe (302) and a second air pipe (306) which are communicated with each other;

one end of the first air pipe (302) is inserted into the second air pipe (306), the other end of the first air pipe (302) is provided with the first air inlet (304), one end of the second air pipe (306) is provided with the second air inlet (308), and the other end of the second air pipe (306) is provided with the air outlet (310);

the first air pipe (302) is a straight pipe or one end of the first air pipe (302) inserted into the second air pipe (306) is bent towards the air outlet (310).

9. The asphalt mixing plant thermal regeneration tail gas treatment system according to claim 7,

the air inlet device (300) comprises a first air pipe (302), a second air pipe (306) and a third air pipe (312) which are communicated with each other;

the first air pipe (302) and the second air pipe (306) are respectively connected with the third air pipe (312), the first air inlet (304) is formed in the first air pipe (302), the second air inlet (308) is formed in the second air pipe (306), and the air outlet (310) is formed in the third air pipe (312).

10. A mixing station, comprising:

the feeding device is used for conveying reclaimed materials;

the asphalt mixing plant thermal regeneration tail gas treatment system of any one of claims 1 to 9, wherein a reclaimed material drying device of the asphalt mixing plant thermal regeneration tail gas treatment system is connected with the feeding device.

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