CN111632549A - Continuous automatic production system and method applied to modified asphalt - Google Patents
Continuous automatic production system and method applied to modified asphalt Download PDFInfo
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- CN111632549A CN111632549A CN202010612112.8A CN202010612112A CN111632549A CN 111632549 A CN111632549 A CN 111632549A CN 202010612112 A CN202010612112 A CN 202010612112A CN 111632549 A CN111632549 A CN 111632549A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 185
- 238000002156 mixing Methods 0.000 claims abstract description 169
- 230000008961 swelling Effects 0.000 claims abstract description 124
- 238000011161 development Methods 0.000 claims abstract description 77
- 239000002994 raw material Substances 0.000 claims abstract description 36
- 238000010924 continuous production Methods 0.000 claims abstract description 8
- 206010042674 Swelling Diseases 0.000 claims description 116
- 238000010438 heat treatment Methods 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 20
- 230000003139 buffering effect Effects 0.000 claims description 18
- 239000000047 product Substances 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000005086 pumping Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/82—Combinations of dissimilar mixers
- B01F33/821—Combinations of dissimilar mixers with consecutive receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/714—Feed mechanisms for feeding predetermined amounts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/881—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise by weighing, e.g. with automatic discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
- B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/10—Melting
- C10C3/12—Devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
- B01F2035/99—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/38—Mixing of asphalt, bitumen, tar or pitch or their ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a continuous automatic production system applied to modified asphalt, which comprises a raw material module, a mixing module, a development swelling module, a temperature control module, a metering module and a wind power conveying module, wherein the raw material module is used for preparing a raw material; the mixing module comprises a high-speed mixing stirrer and a low-speed mixing stirrer, and a development swelling module which comprises a plurality of groups of tubular swelling developers and a plurality of groups of tubular swelling developers, wherein the tubular swelling developers are sequentially connected from top to bottom in an end-to-end manner, spiral conveying shafts used for conveying materials are arranged in the tubular swelling developers, and a plurality of pins are fixedly inserted in the side walls of the tubular swelling developers. The production equipment and the process method can well realize the continuous production of the modified asphalt, and a plurality of reaction kettle stirring tanks for material mixing and swelling integration are not required to be arranged in the same workshop, so that the uniformity and the performance effect of the finished modified asphalt are better, and the process method has the advantages of short modification time, low energy consumption, safety and environmental protection, and can meet the requirements of clean and safe production.
Description
Technical Field
The invention relates to the technical field of automatic production of modified asphalt, in particular to a system and a method for continuous automatic production of modified asphalt.
Background
Many changes occur to modern highways and roads: the traffic flow and the driving frequency are increased rapidly, the axle weight of a freight car is increased continuously, lane-divided one-way driving is generally carried out, and the anti-flow property of the road surface, namely the anti-rutting capability at high temperature is required to be further improved; the flexibility and elasticity, namely the capability of resisting cracking at low temperature are improved; the wear resistance is improved, the service life is prolonged, a modern building generally adopts a large-span prestressed roof panel, the roof waterproof material is required to adapt to large displacement, the roof waterproof material is more tolerant to severe high and low temperature climatic conditions, the durability is better, the roof waterproof material has self-adhesion, the construction is convenient, the maintenance workload is reduced, the existing highway and grade highway construction is widely carried out by adopting SBS modified asphalt, the SBS price is up to 2 ten thousand per ton along with the sudden rise of the petroleum price, and therefore, the novel process, the replacement and innovation of new equipment are already a pressing topic of highway construction.
Besides, in addition to the application in the field of highways, pre-paved/wet-paved asphalt is widely used in roads, waterproof engineering and corrosion protection, but because asphalt is not very good in high temperature resistance, flow resistance, low temperature flexibility, weather resistance and the like, a lot of problems exist in application effect, such as low temperature flexibility, high temperature resistance and poor cohesion for waterproof coiled materials, the coiled materials in waterproof coiled material factories are brittle and easy to break at low temperature, flow and drip at high temperature, and are difficult to tear films, the low cohesion cannot provide force with a structural base surface, and the asphalt is easy to separate from the base surface.
Among the prior art, a dispensing device for preparing modified asphalt waterproofing membrane of notice number CN 203648417U, it is including the batching jar that has feed inlet and discharge gate, agitating unit wherein includes driving motor, by driving motor drive pivoted (mixing) shaft, the setting is at the epaxial stirring rake of stirring, the batching jar extends the setting along the horizontal direction, the (mixing) shaft sets up in the batching jar along batching jar extending direction, the stirring rake includes many along the extending direction of (mixing) shaft and is the spiral heliciform winding at the epaxial spiral strip of stirring.
However, the above asphalt modification device still has the following obvious defects in the production process: at present, a reaction kettle type ingredient stirring tank is generally used for producing modified asphalt, rubber powder or SBS and auxiliary materials thereof are all required to be completely put into the reaction stirring tank for swelling development, the process method is long in modification time, high in energy consumption, unsafe and environmentally-friendly, large in waste gas generation amount, difficult to control and incapable of meeting the requirements of clean and safe production, so that a good continuous production line cannot be formed due to the fact that the production device adopts a mode of an independently arranged asphalt swelling tank, the swelling effect is poor, and equipment and modification process improvement are required.
Disclosure of Invention
The invention aims to provide a system and a method for continuously and automatically producing modified asphalt, which are used for solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a continuous automatic production system applied to modified asphalt comprises a raw material module, a mixing module, a development swelling module, a temperature control module, a metering module and a wind power conveying module;
the raw material module comprises a raw material box, a main material box and an auxiliary material box, and the raw material box, the main material box and the auxiliary material box are all in conveying connection with the mixing module;
the mixing module comprises a high-speed mixing stirrer and a low-speed mixing stirrer, a pneumatic discharge valve is connected and arranged between the high-speed mixing stirrer and the low-speed mixing stirrer, raw materials in the raw material box, the main material box and the auxiliary material box are conveyed into the high-speed mixing stirrer, the output end of the high-speed mixing stirrer is connected to the low-speed mixing stirrer, and the output end of the low-speed mixing stirrer is in transmission connection with the development swelling module;
the development swelling module comprises a plurality of groups of tubular swelling developers, the tubular swelling developers are sequentially connected end to end from top to bottom, temperature sensors are arranged at an input port and an output port of each group of tubular swelling developers, a spiral conveying shaft for conveying materials is arranged in each group of tubular swelling developers, a plurality of pins for material backflow are fixedly inserted into the side wall of each tubular swelling developer, one end of each pin is inserted into the tubular swelling developers, and the pins are not in contact with the spiral conveying shaft.
Preferably, the temperature control module comprises an electromagnetic heating module and a heat conducting oil heating pipe, the heat conducting oil heating pipe is respectively arranged on the outer side wall of the high-speed mixing stirrer and the outer side wall of the low-speed mixing stirrer, and the electromagnetic heating module is arranged on the outer side wall of the tubular swelling development device.
Preferably, the electromagnetic heating module comprises an electromagnetic heater wound on the outer side wall of the tubular swelling developer and a PID temperature controller in control connection with the electromagnetic heater.
Preferably, the metering module comprises a metering tank and a weigher arranged on the metering tank, and the lower part of the metering tank is connected to the high-speed mixing stirrer;
the wind power conveying module comprises a Roots blower and a vacuum-pumping tank communicated with the Roots blower, the vacuum-pumping tank is arranged above the metering tank and connected with the metering tank, and the main material box and the auxiliary material box are connected with the vacuum-pumping tank.
Preferably, the multiple groups of spiral conveying shafts of the tubular swelling development device are connected in a linkage mode through chains in sequence, and any one group of spiral conveying shafts is driven through main transmission connection.
Preferably, a first high-viscosity asphalt conveying pump is connected between the uppermost tubular swelling development device and the low-speed mixing stirrer, a finished product tank is connected to the output of the lowermost tubular swelling development device, and a second high-viscosity asphalt conveying pump is connected between the finished product tank and the tubular swelling development device.
Preferably, the raw material box is connected to the high-speed mixer through a metering pump.
Preferably, 6 groups of pins are inserted into each group of the tubular swelling developers, and 4 groups of pins are arranged in each group.
A continuous automatic production method applied to modified asphalt is used for a continuous automatic production system of the modified asphalt, and comprises the following steps:
s101, feeding and supplementing: inputting the asphalt in the raw material box into a high-speed mixing stirrer, and conveying the rubber powder or SBS in the main material box and the auxiliary material in the auxiliary material box into the high-speed mixing stirrer through a metering tank;
s102, high-speed mixing: preheating the high-speed mixing stirrer, starting the high-speed mixing stirrer to mix materials, driving the internal materials to self-rub by the rotation of the high-speed mixing stirrer to realize that the temperature of the materials reaches 150-160 ℃, controlling the mixing time to be 5-6 minutes, and controlling the rotating speed of the high-speed mixing stirrer to be 600 r/min;
s103, feeding continuous production: after the materials are mixed at a high speed, discharging the high-speed mixed materials into a low-speed mixing stirrer, closing a pneumatic discharge valve, and simultaneously continuing to feed and supplement materials in the S101 and mix the materials at a high speed in the S102 again by the high-speed mixing stirrer;
s104, material buffering: preheating the low-speed mixing stirrer, buffering materials entering the low-speed mixing stirrer, controlling the temperature in the low-speed mixing stirrer to be 150 ℃, and controlling the rotating speed of the low-speed mixing stirrer to be 22 r/min;
s105, tubular swelling development: the materials are output from the low-speed mixing stirrer, conveyed to the uppermost tubular swelling development device through the first high-viscosity asphalt conveying pump, conveyed through the spiral conveying shaft in the tubular swelling development device, and can collide with the pins to generate backflow and fully swell and develop when being spirally pushed to pass through the pins, the internal temperature of the tubular swelling development device is kept between 160 ℃ and 210 ℃, the swelling and development time of the materials in the development device is 12-14 minutes, and the rotating speed of the spiral conveying shaft is controlled at 10 r/min;
s106, finished product output: and (4) after the materials are conveyed to the tubular swelling and developing device at the lowest part, cooling the materials by a high-viscosity asphalt conveying pump II and conveying the materials into a finished product tank to generate modified asphalt.
Compared with the prior art, the invention has the beneficial effects that:
the mixing module and the development swelling module simplify the preparation process of the modified asphalt, improve the uniformity and the modification efficiency of the modified asphalt material, cancel the use of a shearing machine, synchronously carry out transmission and swelling development in a plurality of groups of tubular swelling developers, ensure that the stirring process has no stirring dead angle, and effectively solve the problems of precipitation, residue and coking of the modified asphalt at the bottom of a stirring tank of a reaction kettle; and can make rubber powder and all the other supplementary modifiers mix with pitch fast, prevent that a large amount of solids or powder modifier from piling up in pitch liquid level pipe wall department all around, the phenomenon of catching fire appears in the high temperature, and high-speed mixer and low-speed mixer can reduce the settlement of batching and lead to the inhomogeneous phenomenon of batching, and the use batching mixer jar that simultaneously can also be abundant improves batching efficiency, guarantees the batching quality.
The equipment adopted by the production system of the invention adopts two types of mixing mixers, namely a high-speed mixing mixer and a low-speed mixing mixer, wherein the high-speed mixing mixer is used for mixing and stirring and the internal materials generate heat by self friction, the low-speed mixing mixer is used for heat preservation and buffering, and the buffering function of the low-speed mixing tank enables the high-speed mixing part and the development swelling part to realize continuous production.
The continuous automatic production method of the invention carries out one-time stirring and mixing on the materials such as raw materials, auxiliary materials and the like through the high-speed mixing stirrer, and immediately discharges the materials into the low-speed mixing stirrer for buffering and heat preservation after the stirring and mixing are finished, thereby leading the high-speed mixing stirrer to immediately carry out the high-speed mixing function of the next batch of materials after discharging, saving a large amount of time and realizing continuous production, leading the materials entering the low-speed mixing stirrer to be conveyed into the tubular swelling development after heat preservation and buffering, leading the materials to be capable of carrying out component swelling development in the tubular swelling development by controlling the total length and the internal transmission speed of the tubular swelling development, leading the materials to generate backflow by impacting through the arrangement of the pins so as to achieve the process aim of further mixing, leading the materials to develop while being conveyed in the tubular swelling developm, the process continuity of the modified asphalt production can be better ensured, so that the automatic production can be better realized, a perfect production line can be formed, the modified asphalt can be well applied to industrial production, and the modified asphalt can be industrially produced in a certain scale.
The production equipment and the process method can well realize the continuous production of the modified asphalt, a plurality of reaction kettle stirring tanks for material mixing and swelling integration are not required to be arranged in the same workshop, the working efficiency is greatly improved, the uniformity and the performance effect of the finished modified asphalt are better, the process method has short modification time and low energy consumption, is safe and environment-friendly, and can meet the requirements of clean and safe production.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the metering module and the pneumatic transport module of the present invention;
FIG. 3 is a schematic diagram of the internal structure of the tubular swelling developer of the present invention;
FIG. 4 is a schematic flow chart of the continuous and automatic production method of modified asphalt according to the present invention;
FIG. 5 is a schematic view of an embodiment of the continuous and automatic production method of modified asphalt according to the present invention;
FIG. 6 is a schematic view of a second embodiment of the continuous and automatic production method of modified asphalt according to the present invention.
In the figure: the device comprises a raw material box 1, a main material box 2, an auxiliary material box 3, a high-speed mixing stirrer 4, a low-speed mixing stirrer 5, a pneumatic discharge valve 6, a 7-tube swelling development device, a spiral conveying shaft 8, a pin 9, a metering tank 10, a weighing device 11, a Roots blower 12, a vacuum pumping tank 13, a chain 14, a main transmission 15, a high-viscosity asphalt delivery pump I16, a high-viscosity asphalt delivery pump II 17, a finished product tank 18 and a metering pump 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
the utility model provides a be applied to continuous automated production system of modified asphalt, includes raw materials module, mixes module, the module that swells of developing, temperature control module, metering module and wind-force transport module, and temperature control module includes electromagnetic heating module and conduction oil heating pipe, and electromagnetic heating module is used for heating and temperature control the module that swells of developing, and the conduction oil heating pipe is used for preheating and heat preservation treatment to high-speed mixer 4 and the mixed mixer 5 of low-speed.
Raw materials module, including raw materials box 1, main material box 2 and auxiliary material box 3, wherein raw materials box 1 is used for storing pitch, main material box 2 is used for depositing rubber powder or SBS modified material, auxiliary material that modified in-process need be used is deposited to auxiliary material box 3, raw materials box 1, main material box 2 and auxiliary material box 3 all with mix module transport connection, the material in raw materials box 1, main material box 2 and the auxiliary material box 3 need transmit to mix in the module in the high-speed mixer 4. The raw material box 1 is connected to a high-speed mixing stirrer 4 through a metering pump 19, asphalt can be quantitatively and directly transmitted to the high-speed mixing stirrer 4 through the use of the metering pump 19, a metering module comprises a metering tank 10 and a weighing device 11 installed on the metering tank 10, the weighing device 11 is used for weighing the weight of materials in the metering tank 10, the lower part of the metering tank 10 is connected to the high-speed mixing stirrer 4, after the materials in the metering tank 10 reach the required weight, the materials are released and discharged from the metering tank 10, so that the materials directly fall into the high-speed mixing stirrer 4, a wind power conveying module comprises a Roots blower 12 and a vacuumizing tank 13 communicated with the Roots blower 12, two groups of wind power conveying modules are arranged corresponding to a main material box 2 and an auxiliary material box 3, the vacuumizing tank 13 is arranged above the metering tank 10 and connected with the metering tank 10, the main material box 2 and the auxiliary material box 3 are both connected with the vacuumizing tank, to the material in main material box 2 and the auxiliary material box 3, at first carry out evacuation processing through roots's fan 12 to evacuation jar 13, the negative pressure environment in the evacuation jar 13 can be directly in taking out the material of corresponding weight to metering tank 10 afterwards, realizes the purpose of material loading feed supplement.
The mixing module comprises a high-speed mixing stirrer 4 and a low-speed mixing stirrer 5, heat-conducting oil heating pipes are respectively arranged on the outer side wall of the high-speed mixing stirrer 4 and the outer side wall of the low-speed mixing stirrer 5, the high-speed mixing stirrer 4 is preheated through the heat-conducting oil heating pipes, the low-speed mixing stirrer 5 is preheated and insulated through the heat-conducting oil heating pipes, the situation that materials after high-speed mixing are solidified and the like in the low-speed mixing stirrer 5 is prevented, the high-speed mixing stirrer 4 is used for high-speed stirring and mixing the materials supplemented from the raw material box 1, the main material box 2 and the auxiliary material box 3, self-friction is realized in the high-speed rotating process through the materials, so that a good mixing effect is achieved, the low-speed mixing stirrer 5 is used for buffering the materials unloaded from the high-speed mixing stirrer 4 and carrying out heat insulation treatment on the materials, and a pneumatic unloading valve, pneumatic discharge valve 6 is used for closing the passageway of unloading between high-speed mixer 4 and the low-speed mixer 5, after the material that mixes in high-speed mixer 4 unloads, close pneumatic discharge valve 6 at once, make high-speed mixer 4 can carry out the high-speed mixing of next batch of material at once, thereby realize the function of continuity of production, raw materials box 1, the raw materials in major ingredient box 2 and the auxiliary material box 3 are carried and are got into high-speed mixer 4, high-speed mixer 4 output connection is on low-speed mixer 5, 5 output of low-speed mixer 5 and the module transmission connection that swells of developing, through the material of low-speed mixer 5 buffering and heat preservation, carry the material to tubular swelling development 7 in through high pitch delivery pump 16 and swell and develop.
The development swelling module comprises a plurality of groups of tubular swelling developers 7, three groups of tubular swelling developers 7 are arranged in the development swelling module, an electromagnetic heating module is arranged on the outer side wall of each tubular swelling developer 7, the electromagnetic heating module comprises an electromagnetic heater wound on the outer side wall of each tubular swelling developer 7 and a PID temperature controller in control connection with the electromagnetic heater, the electromagnetic heater is wound on the tubular swelling developers 7 to heat and control the temperature inside the tubular swelling developers 7, the three groups of tubular swelling developers 7 are sequentially connected end to end from top to bottom, a spiral conveying shaft 8 for conveying materials is arranged inside each tubular swelling developer 7, so that the materials can sequentially pass through the three groups of tubular swelling developers 7 when being conveyed in the tubular swelling developers 7 through the spiral conveying shaft 8, the spiral conveying shafts 8 of the tubular swelling developers 7 are sequentially in linkage connection through a chain 14, any one group of spiral conveying shafts 8 are connected and driven through a main transmission 15, namely, the purpose that one main transmission 15 drives a plurality of groups of spiral conveying shafts 8 to synchronously rotate is realized, in addition, the swelling development time of materials in three groups of tubular swelling developers 7 can be well and automatically controlled through the length of the tubular swelling developers 7 or the rotating speed of the spiral conveying shafts 8, a plurality of pins 9 are fixedly inserted on the side wall of the tubular swelling developers 7, 6 groups of pins 9 are inserted on each group of tubular swelling developers 7, 4 groups of pins 9 are arranged on each group of pins 9, one end of each pin 9 is inserted into the tubular swelling developers 7, the other end of each pin 9 is fixedly arranged on the outer side wall of the tubular swelling developers 7, the pins 9 are not contacted with the spiral conveying shafts 8, gaps are arranged at the positions where the spiral conveying shafts 8 can be contacted with the pins 9 in the rotating process so as to prevent the pins 9 from being contacted with the spiral conveying shafts 8, a high-viscosity asphalt delivery pump 16 is connected between the uppermost tubular swelling development device 7 and the low-speed mixing stirrer 5, the high-viscosity asphalt delivery pump 16 is used for transmitting the physics in the low-speed mixing stirrer 5, temperature sensors are arranged at an input port and an output port of each group of tubular swelling development devices 7, the real-time temperature of the internal material is detected by the temperature sensors at the input and output ports of each section of tubular swelling development device 7, then the power of an electromagnetic heater on each section of tubular swelling development device 7 is correspondingly adjusted, the temperature of the material in each section of tubular swelling development device 7 is always kept between 160 ℃ and 210 ℃ through the accurate adjustment of a PID temperature controller, so that when a plurality of tubular swelling development devices 7 are transmitted by the temperature sensors arranged at the input and output ports of each section of tubular swelling development device 7, the effect of maintaining the heating temperature of the swelling development is better, the temperature of each section of material can be correspondingly adjusted when not meeting the conditions, so that the uniformity effect of the modified asphalt is better, the output of the lowermost tubular swelling developer 7 is connected with a finished product tank 18, a high-viscosity asphalt conveying pump II 17 is connected between the finished product tank 18 and the tubular swelling developer 7, the material passing through the tubular swelling developer 7 is conveyed through the high-viscosity asphalt conveying pump II 17, and finally the material is cooled and conveyed into the finished product tank 18.
A continuous automatic production method applied to modified asphalt is used for a continuous automatic production system of the modified asphalt, and comprises the following steps:
s101, feeding and supplementing: inputting asphalt in the raw material box 1 into a high-speed mixing stirrer 4, and conveying rubber powder or SBS in the main material box 2 and auxiliary materials in the auxiliary material box 3 into the high-speed mixing stirrer 4 through a metering tank 10;
s102, high-speed mixing: preheating the high-speed mixing stirrer 4, starting the high-speed mixing stirrer 4 to mix materials, driving the internal materials to self-rub by the rotation of the high-speed mixing stirrer 4 to realize that the temperature of the materials reaches 150-160 ℃, controlling the mixing time to be 5-6 minutes, and controlling the rotating speed of the high-speed mixing stirrer 4 to be 600 r/min;
s103, feeding continuous production: after the materials are mixed at high speed, discharging the high-speed mixed materials into a low-speed mixing stirrer 5, closing a pneumatic discharge valve 6, and simultaneously continuing to feed and supplement materials in the S101 and mix the materials at high speed in the S102 by the high-speed mixing stirrer 4 again;
s104, material buffering: preheating the low-speed mixing stirrer 5, buffering materials entering the low-speed mixing stirrer 5, ensuring that the temperature in the low-speed mixing stirrer 5 is controlled at 150 ℃, and controlling the rotating speed of the low-speed mixing stirrer 5 to be 22 r/min;
s105, tubular swelling development: the materials are output from the low-speed mixing stirrer 5, are conveyed into the uppermost tubular swelling development device 7 through the first high-viscosity asphalt conveying pump 16, are conveyed through the spiral conveying shaft 8 in the tubular swelling development device 7, can collide with the pins to generate backflow and fully swell and develop when being spirally pushed to pass through the pins 9, the internal temperature of the tubular swelling development device 7 is kept between 160 ℃ and 210 ℃, the swelling and development time of the materials in the development device is 12-14 minutes, and the rotating speed of the spiral conveying shaft 8 is controlled at 10 r/min;
s106, finished product output: and (3) after the materials are conveyed to the tubular swelling and developing device 7 at the lowest part, cooling the materials by a second high-viscosity asphalt conveying pump 17 and conveying the materials to a finished product tank 18 to generate modified asphalt.
The first embodiment is as follows:
a continuous automatic production method applied to modified asphalt comprises the following steps:
s201, inputting 200KG asphalt in a raw material box 1 into a high-speed mixing stirrer 4, and conveying 30KG rubber powder or 10KG SBS in a main material box 2 and 2KG thiophenol zinc salt in an auxiliary material box 3 into the high-speed mixing stirrer 4 through a metering tank 10;
s202, preheating the high-speed mixing stirrer 4 to 150 ℃, starting the high-speed mixing stirrer 4 to mix materials, driving the internal materials to self-rub by the rotation of the high-speed mixing stirrer 4 to realize that the temperature of the materials reaches 150 ℃, controlling the mixing time to be 5 minutes, and controlling the rotation speed of the high-speed mixing stirrer 4 to be 600 r/min;
s203, after the high-speed mixing of the materials is finished, discharging the high-speed mixed materials into the low-speed mixing stirrer 5, closing the pneumatic discharge valve 6, continuing to feed and supplement materials in the S201 and mixing the materials in the S202 at the high speed by the high-speed mixing stirrer 4, continuing to move downwards by the low-speed mixing stirrer 5 to move S204, and buffering and insulating the materials;
s204, preheating the low-speed mixing stirrer 5 to 150 ℃, buffering the materials entering the low-speed mixing stirrer 5, ensuring that the temperature in the low-speed mixing stirrer 5 is controlled at 150 ℃, and controlling the rotating speed of the low-speed mixing stirrer 5 to be 22 r/min;
s205, outputting the materials from the low-speed mixing stirrer 5, conveying the materials to the uppermost tubular swelling development device 7 through a high-viscosity asphalt conveying pump I16, conveying the mixed materials through a spiral conveying shaft 8 in the tubular swelling development device 7, enabling the materials to impact pins to generate backflow and fully swell and develop when the materials are spirally pushed to pass through the pins 9, wherein when the internal temperature of the tubular swelling development device 7 is kept at 200 ℃, modified asphalt applied to waterproof coiled materials can be obtained after swelling and development is completed, swelling and development time of the materials in the development device is controlled for 14 minutes, and the rotating speed of the spiral conveying shaft 8 is controlled at 10 r/min;
s206, after the materials are conveyed to the tubular swelling and developing device 7 at the lowest position, the materials are cooled through the second high-viscosity asphalt conveying pump 17 and conveyed to the finished product tank 18, and modified asphalt is generated.
Example two:
a continuous automatic production method applied to modified asphalt comprises the following steps:
s301, inputting 200KG of asphalt in the raw material box 1 into a high-speed mixing stirrer 4, and conveying 40KG of rubber powder in the main material box 2 and 2KG of thiophenol zinc salt in the auxiliary material box 3 into the high-speed mixing stirrer 4 through a metering tank 10;
s302, preheating the high-speed mixing stirrer 4 to 150 ℃, starting the high-speed mixing stirrer 4 to mix materials, driving the internal materials to self-rub by rotating the high-speed mixing stirrer 4 to realize that the temperature of the materials reaches 150 ℃, controlling the mixing time to be 5 minutes, and controlling the rotating speed of the high-speed mixing stirrer 4 to be 600 r/min;
s303, after the high-speed mixing of the materials is finished, discharging the high-speed mixed materials into a low-speed mixing stirrer 5, closing a pneumatic discharge valve 6, continuing to feed and supplement materials in the S301 and mixing the materials in the S302 at a high speed by the high-speed mixing stirrer 4, continuing to move downwards by the low-speed mixing stirrer 5 to move S304, and buffering and insulating the materials;
s304, preheating the low-speed mixing stirrer 5 to 150 ℃, buffering the materials entering the low-speed mixing stirrer 5, ensuring that the temperature in the low-speed mixing stirrer 5 is controlled at 150 ℃, and controlling the rotating speed of the low-speed mixing stirrer 5 to be 22 r/min;
s305, outputting the materials from the low-speed mixing stirrer 5, conveying the materials to the uppermost tubular swelling development device 7 through a high-viscosity asphalt conveying pump I16, conveying the mixed materials through a spiral conveying shaft 8 in the tubular swelling development device 7, and enabling the materials to flow back and fully swell and develop when the materials are spirally pushed to pass through a pin 9, wherein when the internal temperature of the tubular swelling development device 7 is kept at 180 ℃, after the swelling and development is completed, modified asphalt applied to roads can be obtained, the swelling and development time of the materials in the development device is controlled for 12 minutes, and the rotating speed of the spiral conveying shaft 8 is controlled at 10 r/min;
s306, after the materials are conveyed to the tubular swelling and developing device 7 at the lowest position, the materials are cooled through a second high-viscosity asphalt conveying pump 17 and conveyed to a finished product tank 18, and modified asphalt is generated.
Testing the performance of the modified asphalt:
the modified asphalt was prepared by the preparation methods in the above example one and example two.
Embodiment one, material selection: 200KG base asphalt, 40KG rubber powder and 2KG zinc thiophenol salt were prepared by the method of example one to obtain modified asphalt.
Example two, material selection: 200KG base asphalt, 30KG rubber powder and 2KG zinc thiophenol salt were prepared by the method of example two to obtain modified asphalt.
Comparative example one: the preparation of the modified asphalt is carried out by adopting a mode of singly arranging a stirring tank in the background technology, and the material selection is as follows: 200KG matrix asphalt, 40KG rubber powder and 2KG zinc thiophenol salt, all the three materials are conveyed into a stirring tank to be stirred and swelled according to the conventional asphalt modification temperature, and modified asphalt is obtained.
Comparative example two: the preparation of the modified asphalt is carried out by adopting a mode of singly arranging a stirring tank in the background technology, and the material selection is as follows: 200KG matrix asphalt, 30KG rubber powder and 2KG zinc thiophenol salt, and conveying all the three materials in parts by mass into a stirring tank, and stirring and swelling the materials according to the conventional asphalt modification temperature to obtain the modified asphalt.
The performance indexes of the modified asphalt are shown in the following table 1:
TABLE 1
As can be seen from the data in Table 1, compared with the conventional technology in which a stirring tank is separately arranged for swelling development, the modified asphalt prepared by the method provided by the invention has the advantages that various performance parameter indexes are kept the same performance or more advantageous performance, and the performance is not remarkably reduced, which depends on the use of the system equipment and the preparation method provided by the invention, so that the stirring uniformity of swelling development is better, and the economic benefit is better.
Testing the production effect of the modified asphalt:
the modified asphalt was prepared by the preparation methods in the above example one and example two.
The first embodiment is as follows: 200KG of asphalt is input into a high-speed mixing stirrer 4, 30KG of rubber powder and 2KG of thiophenol zinc salt are conveyed into the high-speed mixing stirrer 4, the capacity of the high-speed mixing stirrer 4 is 250KG, after preparation is completed, the rubber powder and the 2KG of thiophenol zinc salt are mixed in the high-speed mixing stirrer 4 for 5 minutes and are developed in a tubular swelling developer 7 for 14 minutes, the buffering and transmission time of the low-speed mixing stirrer 5 can be selected according to the length of a transmission pipeline and the flow rate of an asphalt pump, and the approximate time can be ignored, namely, the preparation method in the first embodiment of the invention is adopted, 200KG matrix asphalt is used as a raw material for modification, the production efficiency is about 19min, and the performance test is carried out on the prepared modified asphalt, so that the performance standard requirement is met, and therefore, the time for producing 1000KG of.
Example two: 200KG of asphalt is input into a high-speed mixing stirrer 4, 40KG of rubber powder and 2KG of thiophenol zinc salt are conveyed into the high-speed mixing stirrer 4, the capacity of the high-speed mixing stirrer 4 is 250KG, after preparation is completed, the rubber powder and the 2KG of thiophenol zinc salt are mixed in the high-speed mixing stirrer 4 for 5 minutes and are developed in a tubular swelling developer 7 for 12 minutes, the buffering and transmission time of the low-speed mixing stirrer 5 can be selected according to the length of a transmission pipeline and the flow rate of an asphalt pump, and the approximate time can be ignored, namely, the preparation method in the first embodiment of the invention is adopted, 200KG matrix asphalt is used as a raw material for modification, the production efficiency is about 17min, and the performance test is carried out on the prepared modified asphalt, so that the performance standard requirement is met, and therefore, the time for producing 1000KG of.
Comparative example three: taking the capacity of a separately arranged stirring development tank as an example, 1000KG matrix asphalt is rapidly heated to 195 ℃ through a heat exchanger, 120KG of conventional vulcanized rubber powder and 2KG of zinc thiophenol salt are stirred and added into the matrix asphalt, the internal part of the stirring development tank is subjected to heat preservation development for 3 hours, finally, a cross-linking agent accounting for 0.25 percent of the mass percent of the matrix asphalt is slowly added, the heat preservation and the stirring are continued for 1 hour, and then the common vulcanized rubber powder modified asphalt is prepared.
The production efficiency test data is shown in table 2 below:
| item | Matrix asphalt (KG) | Rubber powder (KG) | Modifying agent | Modification time (min) |
| Example one | 1000 | 150 | 2KG thiophenol zinc salt | 100 |
| Example two | 1000 | 200 | 2KG thiophenol zinc salt | 85 |
| Comparative example No. three | 1000 | 120 | 2KG thiophenol zinc salt | 240 |
TABLE 2
It can be seen from the data in table 2 that, compared with the conventional technology in which a stirring tank is separately arranged for swelling development, the modified asphalt prepared by the present invention has significantly reduced modification time under the condition that the materials such as the matrix asphalt are basically the same, which depends on the use of the system equipment and the preparation method in the present invention, and the stirring uniformity of swelling development is better through the transmission and material reflux of the tubular swelling development device 7, thereby greatly improving the production efficiency and reducing the modification time.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a be applied to continuous automated production system of modified asphalt, includes raw materials module, mixing module, development swelling module, temperature control module, measurement module and wind-force transport module, its characterized in that:
the raw material module comprises a raw material box (1), a main material box (2) and an auxiliary material box (3), and the raw material box (1), the main material box (2) and the auxiliary material box (3) are all in conveying connection with the mixing module;
the mixing module comprises a high-speed mixing stirrer (4) and a low-speed mixing stirrer (5), a pneumatic discharge valve (6) is connected and arranged between the high-speed mixing stirrer (4) and the low-speed mixing stirrer (5), raw materials in the raw material box (1), the main material box (2) and the auxiliary material box (3) are conveyed into the high-speed mixing stirrer (4), the output of the high-speed mixing stirrer (4) is connected to the low-speed mixing stirrer (5), and the output end of the low-speed mixing stirrer (5) is in transmission connection with the development swelling module;
the development swelling module comprises a plurality of groups of tubular swelling developers (7), wherein the tubular swelling developers (7) are sequentially connected end to end from top to bottom, temperature sensors are arranged at the inlet and the outlet of each group of tubular swelling developers (7), a spiral conveying shaft (8) for conveying materials is arranged inside each group of tubular swelling developers (7), a plurality of pins (9) for material backflow are fixedly inserted into the side wall of each tubular swelling developer (7), one end of each pin (9) is inserted into the tubular swelling developers (7), and the pins (9) are not in contact with the spiral conveying shaft (8).
2. The continuous automatic production system applied to the modified asphalt according to the claim 1 is characterized in that: the temperature control module comprises an electromagnetic heating module and a heat conduction oil heating pipe, the heat conduction oil heating pipe is respectively arranged on the outer side wall of the high-speed mixing stirrer (4) and the outer side wall of the low-speed mixing stirrer (5), and the electromagnetic heating module is arranged on the outer side wall of the tubular swelling development device (7).
3. The continuous automatic production system applied to the modified asphalt according to the claim 2 is characterized in that: the electromagnetic heating module comprises an electromagnetic heater wound on the outer side wall of the tubular swelling development device (7) and a PID temperature controller in control connection with the electromagnetic heater.
4. The continuous automatic production system applied to the modified asphalt according to the claim 1 is characterized in that: the metering module comprises a metering tank (10) and a weigher (11) arranged on the metering tank (10), and the lower part of the metering tank (10) is connected to the high-speed mixing stirrer (4);
the wind power conveying module comprises a Roots blower (12) and a vacuum-pumping tank (13) communicated with the Roots blower (12), the vacuum-pumping tank (13) is arranged above the metering tank (10) and connected with the metering tank (10), and the main material box (2) and the auxiliary material box (3) are connected with the vacuum-pumping tank (13).
5. The continuous automatic production system applied to the modified asphalt according to the claim 1 is characterized in that: the spiral conveying shafts (8) of the multiple groups of tubular swelling developers (7) are connected in a linkage mode through chains (14) in sequence, and any one group of spiral conveying shafts (8) is connected and driven through a main transmission (15).
6. The continuous automatic production system applied to the modified asphalt according to the claim 1 is characterized in that: a first high-viscosity asphalt conveying pump (16) is connected between the uppermost tubular swelling development device (7) and the low-speed mixing stirrer (5), a finished product tank (18) is connected to the output of the lowermost tubular swelling development device (7), and a second high-viscosity asphalt conveying pump (17) is connected between the finished product tank (18) and the tubular swelling development device (7).
7. The continuous automatic production system applied to the modified asphalt according to the claim 1 is characterized in that: the raw material box (1) is connected to the high-speed mixing stirrer (4) through a metering pump (19).
8. The continuous automatic production system applied to the modified asphalt according to the claim 1 is characterized in that: 6 groups of pins (9) are inserted into each group of the tubular swelling developers (7), and 4 groups of the pins (9) are arranged in each group.
9. A continuous automatic production method applied to modified asphalt, which is used for the continuous automatic production system of the modified asphalt of any one of claims 1 to 8, and is characterized by comprising the following steps:
s101, feeding and supplementing: inputting asphalt in a raw material box (1) into a high-speed mixing stirrer (4), and conveying rubber powder or SBS in a main material box (2) and auxiliary materials in an auxiliary material box (3) into the high-speed mixing stirrer (4) through a metering tank (10);
s102, high-speed mixing: preheating the high-speed mixing stirrer (4), starting the high-speed mixing stirrer (4) to mix materials, driving the internal materials to self-rub by the rotation of the high-speed mixing stirrer (4) to realize that the temperature of the materials reaches 150-160 ℃, controlling the mixing time to be 5-6 minutes, and controlling the rotating speed of the high-speed mixing stirrer (4) to be 600 r/min;
s103, feeding continuous production: after the materials are mixed at a high speed, discharging the high-speed mixed materials into a low-speed mixing stirrer (5), closing a pneumatic discharge valve (6), and simultaneously continuing to feed and supplement materials at S101 and mix materials at S102 at a high speed by the high-speed mixing stirrer (4);
s104, material buffering: preheating the low-speed mixing stirrer (5), buffering materials entering the low-speed mixing stirrer (5), ensuring that the temperature in the low-speed mixing stirrer (5) is controlled at 150 ℃, and controlling the rotating speed of the low-speed mixing stirrer (5) to be 22 r/min;
s105, tubular swelling development: the materials are output from the low-speed mixing stirrer (5), conveyed to the uppermost tubular swelling development device (7) through a high-viscosity asphalt conveying pump I (16), conveyed through a spiral conveying shaft (8) in the tubular swelling development device (7), and can be collided with pins to generate backflow and fully swell and develop when spirally pushed through the pins (9), the internal temperature of the tubular swelling development device (7) is kept at 160-210 ℃, the swelling and development time of the materials in the development device is 12-14 minutes, and the rotating speed of the spiral conveying shaft (8) is controlled at 10 r/min;
s106, finished product output: and (3) after the materials are conveyed to the tubular swelling and developing device (7) at the lowest part, cooling the materials by a high-viscosity asphalt conveying pump II (17) and conveying the materials to a finished product tank (18) to generate modified asphalt.
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Application publication date: 20200908 |