Counter-flow asphalt reclaimed material heating hot air circulation system

Abstract

The utility model belongs to the technical field of asphalt mixture stirring equipment, and relates to a counter-flow asphalt reclaimed material heating hot air circulating system which comprises a hot blast stove, a burner is connected to the outer end of the hot blast stove, a discharging box is connected to the front end of the hot blast stove, a drying heating roller is connected to the front end of the discharging box, and the drying heating roller is connected to one side of the bottom of a feeding smoke box. A tail gas air pipe is arranged at the top of the feeding smoke box and connected to a dust remover, and a pure air pipe is arranged on one section of the dust remover and connected to the bottom of the hot blast stove through a circulating fan. According to the utility model, flame is prevented from being in direct contact with the reworked material, asphalt aging is avoided, hot air and material flow are prevented from flowing reversely, the reworked material is flexibly heated, the heat exchange efficiency is high, hot air is recycled, the waste of energy is reduced, and the production cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bitumen mixture stirring equipment technical field, concretely relates to a countercurrent type bitumen regeneration material heating hot air circulation system. BACKGROUND

[0002] With the reconstruction and repair of a large number of high-grade pavements, old bitumen mixture recycling is gradually valued, and bitumen regeneration material heating recycling is a complete technology that makes the waste bitumen mixture milled from the road to a certain temperature after crushing, makes the bitumen performance on the regeneration material partially or wholly recovered and recycled, the difficulty lies in that when bitumen regeneration material is heated, the regeneration material is contacted with flame, and the bitumen attached to the regeneration material is easily aged, and the regeneration material and heat flow are the same, the smoke temperature is too high when separating, heat loss is serious, and energy is wasted. UTILITY MODEL CONTENTS

[0003] The utility model discloses a countercurrent type bitumen regeneration material heating hot air circulation system, has the countercurrent type bitumen regeneration material heating hot air circulation function, and solves the problem of the prior art.

[0004] In order to achieve the above object, the utility model adopts the technical scheme, and the utility model provides a countercurrent type bitumen regeneration material heating hot air circulation system, which comprises a hot air furnace, the outer end of the hot air furnace is connected with a burner, the front end of the hot air furnace is connected with a discharge box, the front end of the discharge box is connected with a drying and heating roller, the drying and heating roller is connected to one side of the bottom of a feeding smoke box, a tail gas air pipe is arranged at the top of the feeding smoke box, the tail gas air pipe is connected to a dust collector, a pure air pipe is arranged at one section of the dust collector, and the pure air pipe is connected to the bottom of the hot air furnace through a circulating fan.

[0005] Preferably, the bottom of the hot air furnace is provided with a secondary air inlet, and the pure air pipe is connected to the hot air furnace through the secondary air inlet.

[0006] Preferably, the discharge box is sealingly connected to the front end of the hot air furnace through a flange, and a V-shaped guide chute is arranged at the bottom of the discharge box body.

[0007] Preferably, the discharge end of the drying and heating roller is connected to the feeding smoke box through a rotary joint, and a heat preservation jacket is arranged outside the drying and heating roller.

[0008] Preferably, the heat preservation jacket comprises, from inside to outside, a stainless steel inner container layer, an aluminum silicate fiber blanket and a corrugated steel plate shell, and the inner cavity of the heat preservation jacket is filled with expanded perlite particles.

[0009] Preferably, the circulating fan adopts a double-phase stainless steel 2205 material impeller, and a silencer is arranged at the inlet and outlet of the circulating fan.

[0010] Preferably, the hot blast stove bottom is V-shaped, and the hot blast stove is internally provided with staggered baffle plates.

[0011] Compared with the prior art, the asphalt regenerating material heating hot blast circulating system has the advantages and positive effects that,

[0012] The present application avoids direct contact between the flame and the regenerating material, avoids asphalt aging, and realizes reverse flow of the hot air and the material flow, performs flexible heating on the regenerating material, has high heat exchange efficiency, and realizes recycling of the hot air, thereby reducing energy waste and saving production cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of not deviating from the concept of the present application.

[0014] Figure 1 The structure diagram of the countercurrent asphalt regenerating material heating hot blast circulating system of an embodiment;

[0015] In the above figure, 1, burner, 2, hot blast stove, 3, discharge box, 4, drying and heating roller, 5, feeding smoke box, 6, tail gas air pipe, 7, dust collector, 8, pure air pipe, 9, circulating fan. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor under the premise of not deviating from the concept of the present application.

[0017] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0018] Embodiment 1, as Figure 1As shown, a counter-flow asphalt regeneration material heating hot air circulation system, including hot air furnace 2, hot air furnace 2 is the core heating unit, the air is heated to form high temperature hot air, avoid direct contact with flame regeneration material by indirect heating method to prevent asphalt aging due to high temperature flame contact. The hot air furnace 2 outer end is connected with burner 1, through the burner 1 provides heat source, burner 1 uses fuel combustion, for hot air furnace 2 generates high temperature hot air, through the external connection design, ensure that the flame and regeneration material isolation, avoid asphalt aging. Hot air furnace 2 front end is connected with discharge box 3, discharge box 3 front end is connected with drying heating drum 4, discharge box 3 connects hot air furnace 2 and drying heating drum 4, guide regeneration material evenly into drying heating drum 4, regeneration material in drying heating drum 4 counter-current contact hot air, through the rotation movement realizes uniform heating.

[0019] Drying heating drum 4 is connected to one side of the bottom of the feed smoke box 5, the top of the feed smoke box 5 is provided with tail gas air pipe 6, the tail gas air pipe 6 is connected to dust collector 7, the tail gas air pipe 6 transports dust-containing flue gas to dust collector 7, the dust collector 7 generates pure wind after filtering particulate matter, the feed smoke box 5 is connected with drying drum and tail gas air pipe 6, collects heated tail gas and guides to dust collector 7, the dust collector 7 is provided with pure wind air pipe 8, the pure wind air pipe 8 is connected to the bottom of the hot air furnace 2 through circulating fan 9, the pure wind air pipe 8 sends clean air after dust removal back to the hot air furnace 2 to form hot air circulation.

[0020] Working principle: pure wind is sent into the furnace from the air inlet at the bottom of the hot air furnace 2 by the circulating fan 9, is converted into hot air by flame combustion, enters the drying heating drum 4 through the discharge box 3, and exchanges heat with the material flow flowing in the opposite direction in the drying heating drum 4, and performs flexible heating on the regeneration material (separates at high temperature and meets at low temperature), the hot air after heat exchange is polluted by the material flow and becomes tail gas, the tail gas is purified into pure wind by the dust collector 7, at this time the pure wind still has a lot of heat, is sent into the hot air furnace 2 by the circulating fan 9 for next circulation.

[0021] Now the specific design of the above key components will be described in detail:

[0022] The bottom of the hot air furnace 2 is provided with a secondary air inlet, and the pure wind air pipe 8 is connected to the hot air furnace 2 through the secondary air inlet. The bottom of the hot air furnace 2 is provided with an opening connected with the pure wind air pipe 8, which is located close to the burner 1 area, to ensure that the clean air enters the furnace uniformly. The introduction of pure air after dust removal can supplement oxygen to optimize the combustion conditions, and dilute the high temperature flue gas to avoid local overheating

[0023] The discharge box 3 is sealingly connected to the front end of the hot air furnace 2 through a flange, the bottom of the discharge box 3 is provided with a V-shaped material guide groove. The discharge box 3 and the hot air furnace 2 are fastened by flange bolts, combined with high temperature sealing gasket, such as graphite gasket, to ensure the air tightness of the connection. The bottom of the box body is inverted V-shaped slope, the inclination angle is about 45°-60°, and the surface is covered with wear-resistant steel plate.

[0024] The discharge end of the drying and heating roller 4 is connected to the feeding tobacco box 5 through a rotary joint, and the discharge end is connected to the feeding tobacco box 5 through a rotary support bearing, the inside adopts a labyrinth seal or a mechanical seal, allowing the roller to rotate freely while isolating external air. The drying and heating roller 4 is externally sleeved with a heat preservation jacket. The heat preservation jacket is sequentially composed of a stainless steel inner layer, an aluminum silicate fiber blanket, and a corrugated steel plate shell from inside to outside, and the inner cavity of the heat preservation jacket is filled with expanded perlite particles.

[0025] The circulating fan 9 adopts a double-phase stainless steel 2205 material impeller, and the inlet and outlet of the circulating fan 9 are provided with silencers. The double-phase stainless steel is suitable for a dust-containing and high-temperature circulating air environment, and the silencer controls the noise of the fan below 85 dB(A), meeting the industrial noise standard.

[0026] The hot blast stove 2 is V-shaped at the bottom, and the inside of the hot blast stove 2 is provided with staggered baffle plates, which are staggered heat-resistant steel plates, made of 310S stainless steel, with a plate spacing of 50-80 mm and an inclination angle of 30°-45°, forming a “zigzag” airflow channel.

[0027] In Example 2, a countercurrent type asphalt regeneration material heating hot air circulation system includes a burner 1, a hot blast stove 2, a discharge box 3, a drying and heating roller 4, a feeding tobacco box 5, a tail gas air pipe 6, a dust collector 7, a pure air air pipe 8, and a circulating fan 9, which are sequentially connected to form a circulation system. The burner 1 releases a flame to provide energy, and the front end is inserted into the hot blast stove 2. The lower part of the hot blast stove 2 is connected to the circulating fan 9 as a pure air inlet, the two ends are communicated, and the middle cavity provides space for the flame released by the burner 1 to fully burn. The discharge box 3 can guide the heated material flow in the drying and heating roller 4 out, so that the material flow does not come into contact with the flame in the hot blast stove 2. The drying and heating roller 4 is the heating place for the material flow, which is arranged obliquely and has lifting blades inside to drive the material flow to move forward by itself. The feeding tobacco box 5 is internally provided with a chute to allow the regenerated material to enter the drying and heating roller 4, and the cavity is relatively large to meet the space required for water vapor evaporation when cold material meets heat. The tail gas air pipe 6 connects the feeding tobacco box 5 and the dust collector 7 to provide a tail gas flow path. The dust collector 7 purifies the tail gas into pure air, the pure air air pipe 8 connects the dust collector 7 and the circulating fan 9 to provide a pure air flow path, and the circulating fan 9 provides kinetic energy for the circulating air.

[0028] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, the circuit connection adopts the conventional connection mode in the prior art, and the details are not described herein, and the contents not described in detail in the description belong to the prior art known by the professional technical personnel.

[0029] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms, and any skilled person in the art can change or modify the equivalent embodiments applied to other fields by using the disclosed technical content, but any simple modification, equivalent change and modification made on the basis of the technical essence of the utility model to the above embodiments still belongs to the protection scope of the technical scheme of the utility model.

Claims

1. A counter-flow asphalt recycling material heating hot air circulation system, characterized in that, The hot blast stove is externally connected with a burner, and the front end of the hot blast stove is connected with a discharge box, the front end of the discharge box is connected with a drying heating roller, the drying heating roller is connected to one side of the bottom of a feeding smoke box, the top of the feeding smoke box is provided with a tail gas air pipe, the tail gas air pipe is connected to a dust collector, and the dust collector is provided with a pure air pipe at one section, the pure air pipe is connected to the bottom of the hot blast stove through a circulating fan.

2. The counterflow asphalt recycling material heating hot air circulation system according to claim 1, characterized in that, The bottom of the hot blast stove is provided with a secondary air inlet, and the pure air pipe is connected to the hot blast stove through the secondary air inlet.

3. The counterflow asphalt recycling material heating hot air circulation system according to claim 1, characterized in that, The discharge box is sealingly connected to the front end of the hot blast stove through a flange, and the bottom of the discharge box body is provided with a V-shaped material guide groove.

4. The counter-flow asphalt recycling material heating hot air circulation system according to claim 1, characterized in that, The discharge end of the drying heating roller is connected to the feeding smoke box through a rotary joint, and the drying heating roller is externally sleeved with a heat preservation jacket.

5. The counter-flow asphalt recycling material heating hot air circulation system according to claim 4, characterized in that, The heat preservation jacket comprises, from inside to outside, a stainless steel inner container layer, an aluminum silicate fiber blanket and a corrugated steel plate shell, and the inner cavity of the heat preservation jacket is filled with expanded perlite particles.

6. The counter-flow asphalt recycling material heating hot air circulation system according to claim 1, characterized in that, The circulating fan adopts a double-phase stainless steel 2205 material impeller, and the inlet and outlet of the circulating fan are provided with silencers.

7. The counter-flow asphalt recycling material heating hot air circulation system according to claim 1, characterized in that, The bottom of the hot blast stove is V-shaped, and the inside of the hot blast stove is provided with staggered baffle plates.

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