CN1053255A - Thermal oil fusing and water back anti-corrosion asphalt method and apparatus - Google Patents
Thermal oil fusing and water back anti-corrosion asphalt method and apparatus Download PDFInfo
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- CN1053255A CN1053255A CN 90106309 CN90106309A CN1053255A CN 1053255 A CN1053255 A CN 1053255A CN 90106309 CN90106309 CN 90106309 CN 90106309 A CN90106309 A CN 90106309A CN 1053255 A CN1053255 A CN 1053255A
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Abstract
The invention discloses the method and apparatus of a kind of thermal oil fusing and water back anti-corrosion asphalt.With the oil field Sweet natural gas is fuel, and heat transfer oil heater is heated, and makes thermal oil reach 280-300 ℃.Thermal oil is given thermal energy conduction the solid-state pipeline corrosion protection pitch in the tar kettle again, makes its fusing and reaches 220-240 ℃ use temperature.Technical process mainly comprises the heat supply unit and uses the hot cell two parts.Key equipment is a gas heating system, the tar kettle of chuck and coiled pipe heat transfer structure and pitch waste gas purification apparatus.Major advantage is the thermo-efficiency height, and pitch is difficult for coking, and temperature is regulated control easily, has stopped fire failure, and environmental pollution is light, and labor condition and intensity are improved greatly.
Description
The present invention is the method and apparatus of relevant thermal oil fusing and water back anti-corrosion asphalt.It belongs to the bitumen production technical field of pipeline corrosion protection.Its technical process mainly comprises the heat supply unit and uses hot cell, and the pitch waste gas purification apparatus.
For many years, the most of pitch glasscloth insulation that adopts of petroleum pipe line is anticorrosion, and with the direct heat fused and boil pitch at the bottom of tar kettle of naked light.Main drawback is thermo-efficiency too low (having only about 20%) still not, and the tar kettle coking is very serious, wastes a large amount of bituminous materials, shortens tar kettle work-ing life greatly, also because the clear pot and more renew pot of often stopping production can cause a large amount of output values losses.After the tar kettle coking, the poisonous and carcinogenic waste gas of generation further rolls up, and serious harm operator ' s health, and near numerous residents bringing disaster to are simultaneously also because pitch and pitch waste gas all are flammable and explosive substances, so naked light heats frequent presence of fire accident.In addition, the asphalt temperature of this method is wayward, and heat-up time is longer.In order to break away from this traditional naked light direct heating method, certain elephant had at first been tried out superheated vapour fusing and the anti-pitch of water back at home in recent years.Its advantage is to have reduced coking and clear pot.Main drawback is that the superheated vapour apparatus cost is too high, and construction investment is too big, the operative technique more complicated.Another main drawback is that the heat of superheated vapour has only few some to be absorbed by tar kettle, most heat is along with being discharged up to the superheated vapour more than 500 ℃, its thermo-efficiency even lower than above-mentioned naked light heating, overall economic efficiency is not high certainly, thereby fails to apply.
Heat-conducting oil heating technology begins to use in China from the eighties, has been applied to industries such as chemical industry, weaving, printing and dyeing at present.In recent years, road construction industry also begins to utilize thermal oil to road bitumen heating and insulation.But road bitumen and pipeline corrosion protection pitch differ widely.The road bitumen label is low, and softening temperature has only 25～45 ℃, and use temperature has only 100～120 ℃, and good fluidity, and impurity is few.Its used heat transfer oil heater is made fuel with coal, and needing also needs air blast and cleaning apparatus with a huge coal fired stove and complicated stoking and deslagging device thereof.The road bitumen pot is airtight cylindrical horizontal, can not add fix-bitumen in pot.Generally be with thermal oil coiled pipe in the pot to liquid road bitumen heat temperature raising in the pot or maintain use temperature, move the working-yard to asphalt truck again and use.Inclusion-free can be clear in the pot, also noncoking.Pipeline corrosion protection pitch is spy's pitch, softening temperature is up to 125～140 ℃, and use temperature is up to 220～240 ℃, so the working temperature of thermal oil requires to reach 280～300 ℃, and generally be first, continue to be heated to use temperature again solid-state normal-temperature anti-corrosion asphalt heat fused.The fuel used oil field Sweet natural gas that is generally.Therefore, existing heat-conducting oil heating road bitumen method and apparatus still can not be used for fusing and water back anti-corrosion asphalt.
97253 pieces of patent documentations in the retrieval " domestic patent database " had not been found only to find the patent document of several pieces of relevant tar kettles about utilizing the thermal oil fusing and heating any bituminous associated documents, most is fuel with the coal, as 86205289U, 87200011U, 87211566.6 etc.A piece 87206468U patent document is wherein arranged, and the large-scale tar kettle of introduction is to be fuel with gas or oil.But something in common all is that one of main drawback is that thermo-efficiency is not too high with naked light direct heating tar kettle bottom, the 2nd, and the bottom of a pan coking is inevitable, and the 3rd, naked light causes fire failure easily, the 4th, asphalt temperature is wayward.
The objective of the invention is to avoid above-mentioned weak point of the prior art, a kind of method and apparatus that utilizes thermal oil fusing and water back anti-corrosion asphalt is provided, further improve thermo-efficiency, more effectively prevent the tar kettle coking, stop fire failure, easily and reliably control asphalt temperature, and eliminate pitch exhaust emission environment.
The objective of the invention is to realize by following method and apparatus.
Processing method is: with the oil field Sweet natural gas is fuel, is heat transfer fluid with the thermal oil, as propulsion source, forces the thermal oil sealing and circulating with hot oil pump.Heat energy is transported to asphalt melting and the pot that heats up, and by chuck and the dual heat transfer mechanism of coiled pipe in the pot, the pipeline corrosion protection pitch that heat transferred is solid-state makes its fusing and continues the temperature that heating reaches the pipeline corrosion protection job requirements.The thermal oil oil return of coming out from tar kettle is through gas-oil separation and filtration, turned back to heat transfer oil heater by the circular-pump pressurization again and reheats and be warming up to working temperature, and then enter tar kettle.So move in circles, continuously provide heat to the drop pot.
Technical process mainly comprises the heat supply unit and uses hot cell, and the pitch waste gas purification apparatus.The unitary major equipment of heat supply comprises natural gas burner, heat transfer oil heater, oil-gas separator, strainer, thermal oil recycle pump, expansion drum, filling pump and storage tank etc.; Mainly comprise asphalt heater, intensification tar kettle, low level Asphalt tank, insulation bitumenpump, insulation asphalt valve, insulation pitch pipeline and infantees Asphalt tank etc. with hot cell.The heat supply unit with enter (going out) by thermal oil and the oil return pipeline is linked to be an airtight thermal energy exchange recycle system with hot cell.The pitch waste gas purification apparatus mainly comprises exhausting valve, suction fan, water-washing cleaning cartridge, water pump and pond etc.
The equipment that plays key effect in the above-mentioned technical process is gas heating system, the asphalt heater that natural gas burner and heat transfer oil heater constitute, and the pitch waste gas purification apparatus.
Natural gas burner is a cylindrical shape, and the lower portion diameter is slightly less than upper half part.Mainly partly form by natural gas fired rifle, artificial atmosphere window, Sweet natural gas inlet mouth, burning nozzles and combustion chamber etc.The combustion chamber is surrounded by fire-resistant and thermal insulation material.Flame of Natural Gas in the combustion chamber directly heats the thermal oil coiled pipe in the burner hearth, makes the very fast intensification of thermal oil reach 280～300 ℃ working temperature, and thermo-efficiency is up to more than 78%.
Asphalt heater is a cuboid, and the bottom is trapezoidal, and the pot wall is for bilayer and be filled with heat-insulating material.The thermal oil chuck is equipped with in the bottom of a pan, in the pot thermal oil coiled pipe is arranged.Both enlarge heat transfer area, pitch is heated evenly, helped shortening fusing and heating bituminous time; Both improve thermo-efficiency, prevented the tar kettle coking again.The bottom of a pan one end lowest order is equipped with an outlet, is used for removing the impurity that deposits in the pitch.The other end in the bottom of a pan has an outlet, and being used for provides 220～240 ℃ hard pitch to corrosion prevention operation workshop or asphalt truck.On the hard pitch outlet, thermal oil oil-feed and oil return pipeline are installed, and corresponding thermal oil flow control valve and temperature and pressure instrument are housed.Be used for regulating the heat-up rate and the Heating temperature of control tar kettle, convenient and safety.Pot top be provided with can mechanical elevating pot cover, and the pitch outlet port is arranged.Both be convenient to throw in solid block pitch, and can have made pitch airtight fusing and intensification in pot again, the waste gas of generation is difficult for diffusion, can only discharge from this relief outlet.
Exhausting valve in the pitch waste gas purification apparatus, its import links to each other with the pitch outlet port at tar kettle top, and its outlet links to each other with suction fan.By suction fan with deleterious pitch Abgasabsaugung to water-washing cleaning cartridge.Waste gas from bottom to top, water from top to bottom, the two convection current.Waste gas is through water washing cleaning, and exhausted most poisonous and carcinogenic composition is absorbed by water, is discharged in the atmosphere then and goes.Used purifying waste water got to the cleaner top by water pump from the pond, and reusable edible.
The pitch waste gas purification apparatus can also adopt another kind of technical scheme.Promptly the pitch waste gas that suction fan is pumped out is piped in the combustion chamber of the unitary natural gas burner of heat supply and burns, and wherein flammable composition and poisonous and carcinogenic composition is burnt, and then be discharged in the atmosphere and go.
The present invention compared with prior art has following major advantage:
1, further improved thermo-efficiency.Thermal oil gas heating system of the present invention and the contrast of coal-fired heating system, huge and the heavy coal-fired chamber of a kitchen range and stoking slag removing mechanism thereof and air blast cleaning apparatus have not only been saved, and thermo-efficiency brought up to 78% from 70%, remove the calorific loss of thermal conductive oil pipeline and tar kettle, its integrated heat efficiency still can be up to 64.1%.And have only 20% with thermo-efficiency at the bottom of the Sweet natural gas naked light direct heating tar kettle, lower with superheated vapour fusing and heating bituminous thermo-efficiency.
2, solved tar kettle coking hard nut to crack basically.The every covering device of the present invention not only can make 60 tons of high-quality asphalts exempt from the coking loss every year, and can prolong tar kettle work-ing life, and the annual average tar kettle of saving is invested 50,000 yuan.The more important thing is no longer often to stop production clear pot or more renew pot that every month few stopping production at least 3 days can be retrieved the output value every year and be lost 5,040,000 yuan.
3, pitch rate of heating and temperature are convenient to regulate control.Operating automation degree of the present invention is higher, is provided with safety alarm device, accurately and reliably, and has fundamentally stopped fire failure.
4, solved problem of environmental pollution effectively.The pitch waste gas purification apparatus that the present invention adopts can make the bituminous industry pollutent that emits be significantly less than the I grade standard index of national regulation.
5, improved labor condition and alleviated labour intensity greatly.Especially the operator is no longer removed the hardship of coking and the evil of pitch poison gas.
Accompanying drawing drawing of the present invention is described as follows:
Fig. 1 is thermal oil fusing of the present invention and water back anti-corrosion asphalt processing method schematic flow sheet.
Fig. 2 is the gas heating system structural representation that natural gas burner among Fig. 1 and heat transfer oil heater constitute.
Fig. 3 is the vertical sectional plan view of the asphalt heater among Fig. 1, and Fig. 4 is that asphalt heater is laterally analysed and observe left view.
Fig. 5 is a pitch waste gas purification apparatus synoptic diagram of the present invention.
Be described in further detail optimum implementation of the present invention below in conjunction with each accompanying drawing.
In the technical process of the present invention shown in Figure 1, the 1st, natural gas burner, the 2nd, heat transfer oil heater, the 3rd, oil-gas separator, the 4th, strainer, the 5th, thermal oil follows pump, and the 6th, expansion drum, the 7th, filling pump, the 8th, storage tank, above equipment has been formed the heat supply unit.Oil-gas separator wherein is used for the moisture that occurs in the thermal oil working process, organic steam and gas delivery are come out, and emits, to guarantee system's works better.The effect of strainer is that the impurity that will may sneak in the thermal oil and the polymkeric substance carbon residue that produces when hot operation are separated.The thermal oil recycle pump is the propulsion source of thermal oil sealing and circulating, needs water pump to supply water during its work and forces cooling.The effect of expansion drum is to hold thermal oil volumetric expansion amount at high temperature, can also interior fluid and the moisture in the removal system, gas and low the waving of replenishment system put composition simultaneously, and have the effect that oil pressure is stablized in compensation.Expansion drum is arranged on system-wide vertex, and is provided with ventilation breather, overflow port and low liquid level alarm device, to guarantee system safety operation.The effect of filling pump is to inject or unload to system to put thermal oil.Storage tank can hold system-wide thermal oil, and the part oil mass that storage tank stores during work can be replenished the deficiency of oil mass at any time to system; When system's oil mass expanded, unnecessary thermal oil flowed into storage tank automatically from the upflow tube of expansion drum.With 9 in the hot cell are asphalt heaters, the 10th, and intensification tar kettle, the 11st, low level Asphalt tank, the 12nd, insulation bitumenpump, the 13rd, insulation asphalt valve, the 14th, insulation pitch pipeline, the 15th, the infantees Asphalt tank in pipeline corrosion protection workshop.Asphalt heater wherein is used for melting solid block pipeline corrosion protection pitch and stores the liquid bitumen that continues heat temperature raising.The intensification tar kettle is used for liquid towards pipeline corrosion protection pitch and continues heating and storing liquid pitch.The low level Asphalt tank is used for temporarily depositing from the refinery and draws the liquid pipeline corrosion protection pitch that unloads, and by insulation bitumenpump and insulation pitch T-valve, injects intensification tar kettle or melting tank and heats then.After reaching use temperature, deliver to the infantees Asphalt tank in corrosion prevention operation workshop by insulation pitch pipeline, also can be by the insulation pitch T-valve asphalt truck of packing into, move that piping installation is on-the-spot to be used to.
Fig. 2 is a thermal oil gas heating system structural representation of the present invention.This system is installed on the overhead fixed support.Natural gas burner 1 is installed in the bottom of heat transfer oil heater 2, and the two one-tenth is as a whole.Natural gas burner is a cylindrical shape, and the lower portion diameter is slightly less than the upper half part diameter.Mainly by natural gas fired rifle 18, artificial atmosphere window 19, Sweet natural gas inlet mouth 20, burning nozzles 21 and combustion chamber 22 etc. are partly formed.Combustion chamber is wherein surrounded by fire-resistant and thermal insulation material, is positioned at burner hearth bottom.Has double thermal oil coiled pipe 23 in the burner hearth of heat transfer oil heater 2.Burning torch 18 and Sweet natural gas inlet mouth 20 join with two Sweet natural gas pipes respectively.During igniting, at first burning torch is extracted out, injected in the burner after lighting, and tighten and fix; Open the valve of Sweet natural gas inlet mouth 20 again and supply gas, Sweet natural gas each burner 21 ejections from the combustion chamber, and by the flame ignition of burning torch 18, whole combustion chamber can be full of the flame that blazes; This flame directly to 23 heating of the thermal oil coiled pipe in the burner hearth, makes thermal oil reach 280～300 ℃ working temperature very soon.The effect of artificial atmosphere window is to regulate the air capacity enter the combustion chamber, makes its blending ratio with Sweet natural gas reach optimum regime, the perfect combustion to greatest extent of assurance Sweet natural gas, and it is the most prosperous that flame reaches.Therefore thermo-efficiency can reach 78%, has both saved a large amount of Sweet natural gases, can also alleviate smoke pollution.
Fig. 3 and Fig. 4 are respectively that the master of the asphalt heater among the present invention looks sectional view and the left structural representation of looking sectional view.Wherein 24 are thermal oil heat-transferring jackets, the 25th, thermal oil heat transfer coiled pipe, the 26th, pitch impurity cleaning outlet, the 27th, liquid hard pitch outlet, the 28th, the pitch outlet port, the 29th, tar kettle mechanical elevating pot cover, 30 and 31 is respectively that the thermal oil of tar kettle is imported and exported, and joins with the advancing of thermal oil, oil return pipeline 16 and 17 respectively.This tar kettle is a cuboid, and the bottom is trapezoidal, and the pot wall is for bilayer and be filled with heat-insulating material.High temperature heat conductive oil conducts heat to pot internal solid pipeline corrosion protection pitch by chuck 24 and coiled pipe 25, makes its fusing and reaches use temperature.Owing to adopted such heat transfer structure, area of dissipation is bigger, and pitch is heated more even, so every pot of 8 tons of normal temperature fix-bitumens can reach 220～240 ℃ use temperature in about 10 hours.Pitch heat-up rate and temperature can be imported and exported the valve regulated and the control of installing on 30 and 31 by thermal oil, and are shown by instrument.Impurity in the pitch is deposited on the trapezoidal the bottom of a pan, can clear up by exporting 26.Hard pitch is transported to the pipeline corrosion protection job shop by outlet 27 or the asphalt truck of packing into is moved the working-yard to.Insulation pitch valve all is housed on every tar kettle.Airtight fusing and the pitch waste gas that produces when adding heated bitumen are covered and indiffusion by pot cover 29, are extracted out purifying treatment by the venting port 28 on the pot top by suction fan.Pot cover 29 is provided with mechanical operating mechanism, and pot cover is raised unlimitedly when packing fix-bitumen in pot, has adorned to fall again and has built.This tar kettle provided by the invention, calorific loss has only 5%, and pitch is coking no longer, and temperature is easy to regulate control, has fundamentally stopped fire failure, and production safety is reliable, has improved labor condition greatly and has alleviated labour intensity.
Fig. 5 is a pitch waste gas purification apparatus synoptic diagram provided by the invention.The outlet port on every tar kettle top is installed an exhausting valve 32, and the exhausting valve outlet port is linked suction fan 33 again.Suction fan is come out the pitch Abgasabsaugung in the tar kettle.Waste gas enters from the lower end of cleaner 34, purifies waste water then to spray from cleaner top waste gas and water convection current.Absorbed by water through the exhausted most poisonous and carcinogenic composition in washing back, and then emit.Used purifying waste water is extracted into the cleaner top by water pump 35 from pond 36, and can recycle.
Claims (6)
1, a kind of solid-state pipeline corrosion protection pitch heat fused and continue heating and make its method and apparatus that reaches use temperature, its technical process mainly comprises the heat supply unit and uses hot cell, and the pitch waste gas purification apparatus, it is characterized in that:
A, with the oil field Sweet natural gas is fuel, with the thermal oil is heat transfer fluid, with hot oil pump as propulsion source, force the thermal oil sealing and circulating, heat energy is transported to asphalt heater and intensification tar kettle, and by chuck and the dual heat transfer mechanism of coiled pipe in the pot, the pipeline corrosion protection pitch that heat transferred is solid-state, make its fusing and reach the temperature of pipeline corrosion protection job requirements, the thermal oil oil return of coming out from tar kettle is through gas-oil separation and filtration, turned back to heat transfer oil heater by the circular-pump pressurization again and reheats and be warming up to working temperature, and then enter tar kettle, so move in circles, continuously provide heat to tar kettle.
B, heat supply unit mainly comprise natural gas burner, heat transfer oil heater, oil-gas separator, strainer, thermal oil recycle pump, expansion drum, filling pump and storage tank etc.; Mainly comprise asphalt heater, intensification tar kettle, low level Asphalt tank, insulation bitumenpump, insulation pitch T-valve, insulation pitch pipeline and infantees Asphalt tank etc. with hot cell; The heat supply unit with enter (going out) by thermal oil and the oil return pipeline is linked to be an airtight thermal energy exchange recycle system with hot cell.
C, pitch waste gas purification apparatus mainly comprise exhausting valve, suction fan, water-washing cleaning cartridge, water pump and pond etc.
2, thermal oil fusing according to claim 1 and water back anti-corrosion asphalt method and apparatus, it is characterized in that the natural gas burner in the heat supply unit is installed in the bottom of heat transfer oil heater, the two one-tenth is as a whole, constituted a gas heating system, this system is installed on the overhead fixed support.
3, thermal oil fusing according to claim 1 and 2 and water back anti-corrosion asphalt method and apparatus, it is characterized in that the natural gas burner in the firing system is a cylindrical shape, the lower portion diameter is slightly less than the upper half part diameter, mainly by the natural gas fired rifle, the artificial atmosphere window, the Sweet natural gas inlet mouth, burning nozzles and combustion chamber etc. are partly formed, the combustion chamber is surrounded by fire-resistant and thermal insulation material, Flame of Natural Gas in the combustion chamber directly heats the thermal oil coiled pipe in the burner hearth, make the very fast intensification of thermal oil reach 280～300 ℃ of working temperatures, thermo-efficiency is up to more than 78%.
4, thermal oil fusing according to claim 1 and water back anti-corrosion asphalt method and apparatus, it is characterized in that with the asphalt heater in the hot cell be cuboid, the bottom is trapezoidal, the pot wall is for bilayer and be filled with heat-insulating material, the thermal oil chuck is equipped with in the bottom of a pan, in the pot thermal oil coiled pipe is housed, both enlarged heat transfer area, pitch is heated evenly, help shortening fusing and add the heated bitumen time, and improved thermo-efficiency, the bottom of a pan one end lowest order is equipped with an outlet, be used for removing the impurity that from pitch, deposits, the other end in the bottom of a pan has an outlet, be used for providing 220～240 ℃ hard pitch to anticorrosioning operation line workshop or asphalt truck, on this pitch outlet, thermal oil oil-feed and oil return pipeline are installed, and corresponding thermal oil flow control valve and temperature and pressure instrument be housed, be used for regulating the heat-up rate and the Heating temperature of control tar kettle, pot top be provided with can mechanical elevating pot cover, and the pitch outlet port is arranged, and both be convenient to throw in block pitch, can make pitch airtight fusing and intensification in pot again, the waste gas that produces is difficult for diffusion, can only discharge from this relief outlet.
5, thermal oil fusing according to claim 1 and water back anti-corrosion asphalt method and apparatus, the import that it is characterized in that the exhausting valve in the pitch waste gas purification apparatus links to each other with the pitch outlet port at tar kettle top, its outlet links to each other with suction fan, by suction fan with deleterious pitch Abgasabsaugung to water-washing cleaning cartridge, waste gas from bottom to top, water from top to bottom, the two convection current, waste gas is absorbed by water through exhausted most poisonous and carcinogenic composition behind the water washing cleaning, be discharged in the atmosphere then and go, used purifying waste water got to the cleaner top by water pump from the pond, and can recycle.
6, thermal oil melts and water back anti-corrosion asphalt method and device according to claim 1 or 5, it is characterized in that the pitch waste gas purification apparatus also can adopt another technical scheme, promptly the pitch waste gas that suction fan is pumped out is piped in the combustion chamber of the unitary natural gas burner of heat supply and burns, wherein flammable composition and poisonous and carcinogenic composition are burnt, and then be discharged in the atmosphere and go.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106309 CN1026415C (en) | 1990-11-12 | 1990-11-12 | Method and equipment for melting heat conducting oil and heating anti-corrosion asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106309 CN1026415C (en) | 1990-11-12 | 1990-11-12 | Method and equipment for melting heat conducting oil and heating anti-corrosion asphalt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1053255A true CN1053255A (en) | 1991-07-24 |
| CN1026415C CN1026415C (en) | 1994-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90106309 Expired - Fee Related CN1026415C (en) | 1990-11-12 | 1990-11-12 | Method and equipment for melting heat conducting oil and heating anti-corrosion asphalt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1026415C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012100A (en) * | 2010-12-02 | 2011-04-13 | 天津海泰环保科技发展有限公司 | Conduction oil electromagnetic wave heating system for rubber powder modified asphalt production line |
| CN101747921B (en) * | 2008-12-09 | 2012-11-21 | 沈阳铝镁设计研究院有限公司 | Jacketed asphalt heater and heating method |
| CN104560087A (en) * | 2015-01-21 | 2015-04-29 | 中化弘润石油化工有限公司 | Modified asphalt production system |
| CN107140334A (en) * | 2017-06-26 | 2017-09-08 | 徐州徐工筑路机械有限公司 | A kind of environmentally friendly stocking system of pitch |
| CN107474867A (en) * | 2017-10-11 | 2017-12-15 | 徐运峰 | A kind of bitumen flue gas environmental protection reduction treatment apparatus |
| CN108504286A (en) * | 2018-06-14 | 2018-09-07 | 秦皇岛市地维建材有限公司 | Multifunctional mobile aqueous rubber asphalt waterproofing paint equipment |
| CN113882215A (en) * | 2021-10-20 | 2022-01-04 | 中电建冀交高速公路投资发展有限公司 | Method for extracting old asphalt of asphalt pavement |
-
1990
- 1990-11-12 CN CN 90106309 patent/CN1026415C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747921B (en) * | 2008-12-09 | 2012-11-21 | 沈阳铝镁设计研究院有限公司 | Jacketed asphalt heater and heating method |
| CN102012100A (en) * | 2010-12-02 | 2011-04-13 | 天津海泰环保科技发展有限公司 | Conduction oil electromagnetic wave heating system for rubber powder modified asphalt production line |
| CN102012100B (en) * | 2010-12-02 | 2012-11-21 | 天津海泰环保科技发展有限公司 | Conduction oil electromagnetic wave heating system for rubber powder modified asphalt production line |
| CN104560087A (en) * | 2015-01-21 | 2015-04-29 | 中化弘润石油化工有限公司 | Modified asphalt production system |
| CN107140334A (en) * | 2017-06-26 | 2017-09-08 | 徐州徐工筑路机械有限公司 | A kind of environmentally friendly stocking system of pitch |
| CN107474867A (en) * | 2017-10-11 | 2017-12-15 | 徐运峰 | A kind of bitumen flue gas environmental protection reduction treatment apparatus |
| CN108504286A (en) * | 2018-06-14 | 2018-09-07 | 秦皇岛市地维建材有限公司 | Multifunctional mobile aqueous rubber asphalt waterproofing paint equipment |
| CN113882215A (en) * | 2021-10-20 | 2022-01-04 | 中电建冀交高速公路投资发展有限公司 | Method for extracting old asphalt of asphalt pavement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1026415C (en) | 1994-11-02 |
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