CN103965944A - Heating furnace for wide-cut hydrocarbon material rich in colloidal asphalt components - Google Patents
Heating furnace for wide-cut hydrocarbon material rich in colloidal asphalt components Download PDFInfo
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Abstract
The invention discloses a heating furnace for wide-cut hydrocarbon material rich in colloidal asphalt components; the heating furnace is particularly suitable to serve as a heating furnace for full-fraction medium and low-temperature coal tar; pressure of discharging heated materials out of outlet of a radiation section is 0.03-0.13MPa, generally 0.05-0.10MPa, and temperature is 350-370 DEG C, generally 355-365 DEG C; calandrias of a radiation chamber are upright and are connected through sharply curved bends; steam or water is injected into coal tar on inlet of a furnace tube of the heating furnace and/or into coal tar in the middle of the furnace tube of the heating furnace; the heating furnace is characterized in that a flow velocity in a pipeline is more than 70m/s, generally more than 100m/s; retention time of process liquid of which main temperature is more than 330 DEG C in a rear furnace tube interval is usually less than 6s, generally less than 4s and preferably less than 2s. The heating furnace disclosed by the invention can effectively avoid coking in the furnace tube, prolong a continuous running cycle of the heating furnace, and prolong a continuous running cycle of a medium and low-temperature coal tar fractionating system.
Description
Technical field
The present invention relates to a kind of process furnace of the wide fraction hydrocarbon material that is rich in gluey pitch shape component, say especially, the present invention relates to the process furnace of coalite tar in a kind of wide fraction that comprises middle coalite tar asphalt component, more particularly, the present invention relates to the process furnace of coalite tar in a kind of full cut, after its heating, the pressure of material discharge radiation section outlet is that 0.03～0.15MPa is generally 0.05～0.10MPa, temperature is 350～370 DEG C and is generally 355～365 DEG C, radiation chamber comb is vertical, between comb, connect with blade bend, to the coal tar of heating-furnace tube inlet and or to coal tar injecting steam or the water in heating furnace tube mid-way, it is characterized in that flow velocity that pipeline internal medium body temperature is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 70 meter per seconds and is conventionally greater than 100 meter per seconds, the residence time that process fluid is greater than the boiler tube interval, rear portion of 330 DEG C in its body temperature is less than 6 seconds conventionally, be generally less than 4 seconds, preferably be less than 2 seconds.The present invention can effectively avoid tube coking, extends process furnace cycle of operation, the cycle of operation of coalite tar fractionating system in prolongation.
Background technology
The charging process furnace of coalite tar separation column in existing full cut is below described, the fractionating column system of coalite tar in full cut, coal tar is separated into tower ground coal pitch and removes the lighting end of coal-tar pitch.
According to coalite tar thermally splitting experiment in full cut, under normal pressure, greatly about 425～435 DEG C, there is first fast pyrolysis generation condenses and discharge a large amount of gas simultaneously in middle coalite tar, partial condensate adheres to the inwall of container, therefore in must strict controlling the highest inner wall temperature TH of heating furnace tube of coalite tar lower than a certain prescribed value such as 425 DEG C, in full scale plant operation conventionally the highest inner wall temperature TH of regulation heating furnace tube lower than 410 DEG C to retain the safety temperature distance of 15 DEG C, like this, the top temperature of coalite tar in the heating furnace tube of not coking determines the thickness of heated stove boiler tube inwall oil film retention layer and the thermal conductivity that oil film composition has.Such as, it is that absolute pressure is that 0.10MPa, temperature are 360 DEG C that separation column requires boiler tube outlet ambient condition, the temperature difference of boiler tube inwall oil film retention layer can only be less than 50 DEG C like this, that is to say the boiler tube inwall oil film retention layer temperature difference even or thinner and oil film everywhere be all less than 50 DEG C of ability meet safety in production and can coking.If the temperature difference of boiler tube inwall oil film retention layer is greater than 50 DEG C, can only be to compensate by reducing working pressure or reducing service temperature, because industrial reduction working pressure exists lower limit, so but can only be to compensate and cause coal-tar pitch productive rate to improve and the reduction of lighting end yield by reduction service temperature conventionally.
For the charging process furnace of coalite tar separation column in full cut, medium in boiler tube has two large features: the firstth, comprise a large amount of easily condensations or easily coking component as alkene, phenols, condensed-nuclei aromatics, gum asphalt, can produce a large amount of condensess and be attached to boiler tube internal surface after exceeding safe limiting temperature; The secondth, in full cut, the boiling range of coalite tar thermal condensation speed wide and the higher component of boiling point is faster, the temperature-rise period of middle coalite tar be the evaporative process of low viscosity light constituent be also the concentration process of the gluey pitch shape of liquid phase component, also just says that the liquid phase in the process fluid of outlet section of close boiler tube is the high density liquid phase of the easy condensation gum asphalt of high viscosity.These features, that petroleum base heavy oil heater is such as the process fluid heat-processed in the boiler tube of petroleum base residual oil delay coking heating furnace is not available, because the gluey pitch shape composition activity of middle coalite tar is high, hydrogen richness is extremely low and very easily condensation coking, and petroleum base heavy oil heater is such as the process fluid in the boiler tube of petroleum base residual oil delay coking heating furnace, under normal pressure, conventionally just can start condensation coking at 485～495 DEG C about 475～505 DEG C greatly.
The charging process furnace of coalite tar separation column in existing industrialized full cut, there is the easy coking of boiler tube, short problem of operational cycle in great majority, within approximately 3～4 months, just need coke cleaning to burn, or adopt the method for changing coking boiler tube to shorten the coke cleaning time, therefore, delay coking, prolong operation cycle has significant industrial value.Because tube coking amount is peeled off speed CDV and determined by green coke speed CPV, coking period CPT, Jiao, below coalite tar separation column in full cut mainly proposed by analyzing the control mode of these three indexs charging process furnace reduce the method for coking amount.
The kinetics prerequisite of stove liquid in pipe coking is the boiler tube inwall that liquid contacts high potential temperature, the boiler tube inwall of contact liq described herein, refer to the contact surface forming between stove liquid in pipe viscous flow film and boiler tube inwall, be a kind of dynamic contact surface or bonding surface, therefore the boiler tube inwall of contact liq can be the boiler tube metal inner surface surface of not coking or the surface of having adhered to the boiler tube inwall coking layer of coking layer; The coking layer that boiler tube inwall has adhered to can be continuous or discontinuous; The coking layer that boiler tube inwall adheres to can produce, expands or come off.
The processing medium residence time that boiler tube inner wall temperature is exceeded to the boiler tube interior region of green coke initial temperature CFT is herein defined as coking period CPT.
Boiler tube inwall Jiao's falling speed is defined as to Jiao herein and peels off speed CDV, the main flowable state Determines by process fluid.
Formation speed burnt in boiler tube is defined as to green coke speed CPV herein, mainly combines decision by the green coke district area CS of boiler tube inwall with the unit surface green coke speed KCPV of the liquid contacting with inside pipe wall green coke district.The unit surface green coke speed KCPV of the liquid contacting with inside pipe wall green coke district belongs to the thermal condensation coking property of liquid phase, forms decision by liquid phase, and the higher unit surface of the concentration green coke speed KCPV of the easy condensation gum asphalt of liquid phase medium-high viscosity is larger.
The process furnace of coalite tar in existing full cut, its radiant coil mounting means has two kinds to be horizontal and rectilinear, and wherein conventional arrangement is horizontal, and horizontal comprises horizontal coil pipe and horizontal lying pipe.
The process furnace of coalite tar in existing full cut, its radiant coil mounting means majority is horizontal person, and Technology origin is charging process furnace and the service experience of using for reference the coke drum of delayed coking unit, but has following shortcoming, cause coking speed fast, cycle of operation is short:
1. in the high temperature section level pipe of heating furnace tube, the liquid phase sedimentation on boiler tube radial section inwall is inhomogeneous, cause the quick coking in bottom of boiler tube inwall: in the high temperature section level pipe of heating furnace tube, due to the evaporation of light constituent and the existence of water vapour, high temperature, vapour phase density under low pressure and density of liquid phase ratio are very little is that gas is little to the power of carrying of liquid, therefore gravity is more remarkable to drop formation sink effect, these droplet impacts are on the inwall of boiler tube bottom time, because the gluey pitch shape component polarity in these drops is strong, viscosity is large, active strong easily thermal condensation, can on the inwall of boiler tube bottom, assemble and form relatively thick liquid film, the increase of thickness of liquid film means that heat transmission resistance increases, boiler tube bottom metal inner wall temperature will raise, thereby the condensation coking speed of the liquid film of aggravation boiler tube bottom thick liquid layer contacting metal inwall one side, once form coking attachment region, polarity in drop is strong, viscosity is large, the gluey pitch shape component of active strong easily thermal condensation will be expanded this coking attachment region as adhering to coking base, and the boiler tube bottom metal inner wall temperature in coking district will further raise, the process that said process progressively develops is exactly the coking process of boiler tube inwall, namely increase the unit surface green coke speed KCPV of the green coke district area CS of boiler tube inwall and the liquid contacting with inside pipe wall green coke district, increase macroscopical green coke speed CPV of boiler tube inwall, observation after coking boiler tube is disintegrated has also confirmed that above-mentioned mechanism is realistic substantially,
2. high viscosity liquid velocity of flow is little causes the residence time long, has extended the coking period CPT of heavy constituent in raw material;
3. the peel-ability of Jiao or green coke precursor is inhomogeneous, the peel-ability of boiler tube bottom interior wall Jiao or green coke precursor is poor: the liquid phase Guinier-Preston zone of the gluey pitch shape that boiler tube bottom forms, because viscosity is high, the strong adhesion of condenses to boiler tube, therefore be difficult to be impacted and depart from metal inner surface and being carried by main fluid by fluid main flow, therefore that Jiao of boiler tube bottom interior wall Jiao or green coke precursor is peeled off speed CDV is low;
Even if 4. improve medium fluid flow velocity in pipe, owing to cannot eliminating the impact of earth gravity, therefore cannot thoroughly overcome three shortcomings above.
The process furnace of coalite tar in existing full cut, its radiant coil mounting means minority is rectilinear person, there is the shortcoming that flow velocity is low: every boiler tube of its radiant section furnace all passes the maximum radiation district of radiation chamber, industrial production shows, very easily coking, reason is that velocity of medium is usually less than 45 meter per seconds.Because boiler tube inner fluid mainstream speed is low, thereby extend coking period CPT; Because boiler tube inner fluid mainstream speed is low, the viscous flow film thickness of boiler tube inwall is large, causes heat transmission resistance large, causes like this rising of boiler tube metal inner surface temperature, thereby has improved green coke speed CPV; Because boiler tube inner fluid mainstream speed is low, the peel-ability of Jiao that fluid main flow is adhered to boiler tube inwall or green coke precursor is little, Jiao to peel off speed CDV little.
In order to address the above problem, in a kind of full cut of the present invention, the technical though of the process furnace of coalite tar is: after its heating, the pressure of material discharge radiation section outlet is that 0.03～0.13MPa is generally 0.05～0.10MPa, temperature is 350～370 DEG C and is generally 355～365 DEG C; Radiation chamber comb is vertical, between comb, connect with blade bend, to the coal tar of heating-furnace tube inlet and or to coal tar injecting steam or the water in heating furnace tube mid-way, it is characterized in that the flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is conventionally greater than 70 meter per seconds, is generally greater than 100 meter per seconds, the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is conventionally less than 6 seconds, is preferably less than 2 seconds.Industrial operation shows, the process furnace of coalite tar in full cut designed according to this invention, can effectively reduce tube coking, conventionally extend process furnace cycle of operation more than one times, effectively extend the cycle of operation of middle coalite tar fractionating system, reduced coke cleaning cost, similarly technology has no report.
Therefore, the first object of the present invention is to propose a kind of process furnace of the wide fraction hydrocarbon material that is rich in gluey pitch shape component; The second object of the present invention is to propose the process furnace of coalite tar in a kind of wide fraction that comprises middle coalite tar asphalt component; The 3rd object of the present invention is to propose the process furnace of coalite tar in a kind of full cut.
For the wide fraction hydrocarbon material that is rich in gluey pitch shape component, the present invention all can apply.
Summary of the invention
The process furnace of a kind of wide fraction hydrocarbon material that is rich in gluey pitch shape component of the present invention, it is characterized in that: the wide fraction hydrocarbon material HDS that is rich in gluey pitch shape component, by heating furnace tube heat temperature raising, after its heating, the absolute pressure of material HDSUT discharge radiation section outlet is 350～380 DEG C lower than 0.20MPa, temperature; Radiation chamber comb is vertical, between comb, connect with blade bend, to the hydrocarbon material HDS of heating-furnace tube inlet and or to medium injecting steam or water in the pipe in heating furnace tube mid-way, the flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 70 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 6 seconds conventionally.
The wide fraction hydrocarbon material HDS that is rich in gluey pitch shape component, can be coalite tar in the wide fraction that comprises middle coalite tar asphalt component, can be coalite tar in full cut.
In processing wide fraction, when coalite tar, the operational condition of process furnace of the present invention is generally: after heating, to discharge the absolute pressure of radiation section outlet be 350～370 DEG C lower than 0.15MPa, temperature to material HDSUT; The flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 100 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 4 seconds.
In processing wide fraction, when coalite tar, the operational condition preferably of process furnace of the present invention is: after heating, to discharge the absolute pressure of radiation section outlet be 350～365 DEG C lower than 0.10MPa, temperature to material HDSUT; The flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 150 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 2 seconds.
It is 65～150 millimeters that the boiler tube of process furnace of the present invention typically has a diameter from, to be generally be 80～125 millimeters.
The furnace tube material of process furnace of the present invention is Cr9Mo or TP316L.
The wide fraction hydrocarbon material HDS that is rich in gluey pitch shape component of process furnace processing of the present invention, is selected from one or more in following material:
1. coalite tar or its distillate or its hot procedure gained oil product;
2. coal-tar middle oil or its distillate or its hot procedure gained oil product;
3. coal-tar heavy oil or its distillate or its hot procedure gained oil product;
4. gelatin liquefaction process gained liquefied coal coil or its distillate or its hot procedure gained oil product;
5. shale oil or its distillate or its hot procedure gained oil product;
6. tar sand basic weight oil or its hot procedure gained oil product;
7. ethylene cracking tar;
8. petroleum base wax oil thermally splitting tar;
9. petroleum base heavy oil thermal course of processing gained oil product, hot procedure is coking heavy oil process or heavy oil catalytic cracking process or heavy oil catalytic pyrolysis process;
The hydrocarbon ils of gluey pitch shape component that what 10. other aromaticity content was high be rich in.
Embodiment
Below describe the present invention in detail.
Pressure of the present invention, refers to absolute pressure.
Conventional boiling point of the present invention refers to vapour, the liquid equilibrium temperature of material under a barometric point.
Conventional boiling range of the present invention refers to the conventional boiling spread of cut.
Petroleum naphtha of the present invention refers to conventional boiling point lower than the conventional liq hydrocarbon of 180 DEG C.
It is the hydro carbons of 180～355 DEG C that diesel component of the present invention refers to conventional boiling point.
It is the hydro carbons of 355～490 DEG C that wax oil component of the present invention refers to conventional boiling point.
Heavy oil component of the present invention refers to conventional boiling point higher than the hydro carbons of 350 DEG C.
The aromatic ring number of condensed-nuclei aromatics mentioned herein is greater than 5, and the aromatic ring number of polycyclic aromatic hydrocarbons is 3～5.
The composition of component of the present invention or concentration or content or yield value, unless stated otherwise, be weight basis value.
Proportion of the present invention, unless stated otherwise, refers to the ratio of fluid density and normal pressure under normal pressure, 15.6 DEG C of conditions, 15.6 DEG C of Water Under density.
Conventional gas hydrocarbon of the present invention, refers to the hydro carbons that is gaseous state under normal condition, comprises methane, ethane, propane, butane.
Conventional liq hydrocarbon of the present invention, refers to the hydro carbons being in a liquid state under normal condition, comprises the hydro carbons that pentane and boiling point thereof are higher.
Impurity composition of the present invention, refers to the hydrocracking thing of non-hydrocarbon component in stock oil as water, ammonia, hydrogen sulfide, hydrogenchloride etc.
Coal tar of the present invention, refer to coal tar or its cut of the processes such as the pyrolysis step from pyrolysis of coal or the dry distillation of coal or coal generating gas process, can be by product coalite tar or its cut of coal generating gas, also can be that coal coking pyrolysis of coal process (comprises semi-coking, middle temperature coking, high-temperature coking process) by product coal tar or its cut, coal tar of the present invention can also be the mixing oil of above-mentioned coal tar, coal tar of the present invention can also be that the extract oil that obtains through light hydrocarbon solvent extraction of above-mentioned coal tar is such as diasphaltene coal tar or its distillate.
High-temperature coking belongs to coal high temperature pyrolysis process, and the outlet temperature of pyrolytic process is generally greater than 900 DEG C, conventionally between 1000～1400 DEG C.Described coal-tar heavy oil refers to coal high temperature pyrolysis and produces the by product crude tar oil of coke and/or the production of town gas process.Coal-tar heavy oil is in primary distillation process, conventionally produce following product: the products such as light oil (topping tar), carbolic oil, naphtalene oil, lightweight washing oil, heavy wash oil, lightweight carbolineum, heavy carbolineum, pitch, carbolic oil can further be separated into crude phenols and dephenolize oil, and naphtalene oil can further be separated into thick naphthalene and de-naphtalene oil.Coal-tar heavy oil lighting end of the present invention refers to: carbolineum, washing oil, naphtalene oil, de-naphtalene oil, carbolic oil, dephenolize oil, light oil and mixing oil thereof.
Due to raw coal character and coking or all variations within the specific limits of gas-making process condition, coal tar oil properties also changes within the specific limits.The processing condition of coal tar primary distillation process and product requirement also change within the specific limits, therefore the character of coal tar lighting end also changes within the specific limits.The character of coal tar lighting end, proportion is generally 0.92～1.25, conventional boiling point is generally 60～500 DEG C and is generally 120～460 DEG C, conventionally metal content is that 5～80PPm, sulphur content are 0.4～0.8%, nitrogen content is 0.6～1.4%, oxygen level is 0.4～9.0%, conventionally water-content is 0.2～5.0%, and carbon residue content is generally 0.5～13%.
Conventionally the olefin(e) centent of coal tar lighting end is high, phenol content is high and contain more component of easily reacting under mitigation condition; therefore; the pre-hydrogenation process of coal tar lighting end of the present invention, is used the single dose of hydrogenation protecting agent, olefins hydrogenation agent, hydrogenation deoxidation agent, hydrogen desulfurization agent etc. or series combination or the mixed loading combination of two agent or multi-agent conventionally.
Coal tar heavy fractioning is coal-tar pitch cut particularly; its metal content is high, gum level is high, asphalt content is high; therefore; the pre-hydrogenation process of coal tar heavy fractioning of the present invention, is used the single dose of hydrogenation protecting agent, hydrodemetallation (HDM) agent, hydrogen desulfurization agent etc. or series combination or the mixed loading combination of two agent or multi-agent conventionally
Below describe characteristic of the present invention in detail.
The process furnace of a kind of wide fraction hydrocarbon material that is rich in gluey pitch shape component of the present invention, it is characterized in that: the wide fraction hydrocarbon material HDS that is rich in gluey pitch shape component, by heating furnace tube heat temperature raising, after its heating, the absolute pressure of material HDSUT discharge radiation section outlet is 350～380 DEG C lower than 0.20MPa, temperature; Radiation chamber comb is vertical, between comb, connect with blade bend, to the hydrocarbon material HDS of heating-furnace tube inlet and or to medium injecting steam or water in the pipe in heating furnace tube mid-way, the flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 70 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 6 seconds conventionally.
The wide fraction hydrocarbon material HDS that is rich in gluey pitch shape component, can be coalite tar in the wide fraction that comprises middle coalite tar asphalt component, can be coalite tar in full cut.
In processing wide fraction, when coalite tar, the operational condition of process furnace of the present invention is generally: after heating, to discharge the absolute pressure of radiation section outlet be 350～370 DEG C lower than 0.15MPa, temperature to material HDSUT; The flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 100 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 4 seconds.
In processing wide fraction, when coalite tar, the operational condition preferably of process furnace of the present invention is: after heating, to discharge the absolute pressure of radiation section outlet be 350～365 DEG C lower than 0.10MPa, temperature to material HDSUT; The flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 150 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 2 seconds.
It is 65～150 millimeters that the boiler tube of process furnace of the present invention typically has a diameter from, to be generally be 80～125 millimeters.
The furnace tube material of process furnace of the present invention is Cr9Mo or TP316L.
The wide fraction hydrocarbon material HDS that is rich in gluey pitch shape component of process furnace processing of the present invention, is selected from one or more in following material:
1. coalite tar or its distillate or its hot procedure gained oil product;
2. coal-tar middle oil or its distillate or its hot procedure gained oil product;
3. coal-tar heavy oil or its distillate or its hot procedure gained oil product;
4. gelatin liquefaction process gained liquefied coal coil or its distillate or its hot procedure gained oil product;
5. shale oil or its distillate or its hot procedure gained oil product;
6. tar sand basic weight oil or its hot procedure gained oil product;
7. ethylene cracking tar;
8. petroleum base wax oil thermally splitting tar;
9. petroleum base heavy oil thermal course of processing gained oil product, hot procedure is coking heavy oil process or heavy oil catalytic cracking process or heavy oil catalytic pyrolysis process;
The hydrocarbon ils of gluey pitch shape component that what 10. other aromaticity content was high be rich in.
Embodiment
Character is as the moisture full cut coal-tar middle oil of table 1, amount of finish is 20t/h, be preheated to 225 DEG C, after the condition of 0.35MPa absolute pressure, after process furnace heating, reach to 358～360 DEG C designed according to this invention, after the condition of 0.1MPa absolute pressure, enter separation column tar opening for feed through turning oil pipeline, fractionator overhead pressure is 0.03MPa, tower low pressure is 0.067MPa, opening for feed pressure is 0.065MPa, 88% of feed coal quality of coke tar has entered in lighting end product more than opening for feed, tower ground coal asphalt quality yield approximately 12%, process furnace can move 8～12 months continuously.
Process furnace radiant coil is single tube journey, and boiler tube interior diameter is DN150 millimeter, and furnace tube material is TP316L.Radiation chamber comb is vertical, between comb, connect with blade bend, the flow rate of injecting 1.0MPa water vapor in the coal tar raw material of heating-furnace tube inlet be about 1000 kilograms/time, 9070 cubic metres of the volumetric flow rates of main body medium/time in the pipe of boiler tube exit.
172 meters of process furnace convection zone coal tar heat transfer tube length, 271 meters of process furnace radiation section coal tar heat transfer tube length.
The mean flow rate that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 100 meter per seconds, in the pipe of boiler tube exit, the flow velocity of main body medium is about 142 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 1.5 seconds.
Table 1 coal tar oil properties
Claims (10)
1. one kind is rich in the process furnace of the wide fraction hydrocarbon material of gluey pitch shape component, it is characterized in that: the wide fraction hydrocarbon material HDS that is rich in gluey pitch shape component, by heating furnace tube heat temperature raising, after its heating, the absolute pressure of material HDSUT discharge radiation section outlet is 350～380 DEG C lower than 0.20MPa, temperature; Radiation chamber comb is vertical, between comb, connect with blade bend, to the hydrocarbon material HDS of heating-furnace tube inlet and or to medium injecting steam or water in the pipe in heating furnace tube mid-way, the flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 70 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 6 seconds conventionally.
2. process furnace according to claim 1, is characterized in that: the wide fraction hydrocarbon material HDS that is rich in gluey pitch shape component is coalite tar in the wide fraction that comprises middle coalite tar asphalt component.
3. process furnace according to claim 1, is characterized in that: the wide fraction hydrocarbon material HDS that is rich in gluey pitch shape component is coalite tar in full cut.
4. according to the process furnace described in claim 1 or 2 or 3, it is characterized in that: after heating, the absolute pressure of material HDSUT discharge radiation section outlet is 350～370 DEG C lower than 0.15MPa, temperature; The flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 100 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 4 seconds.
5. according to the process furnace described in claim 1 or 2 or 3, it is characterized in that: after heating, the absolute pressure of material HDSUT discharge radiation section outlet is 350～365 DEG C lower than 0.10MPa, temperature; The flow velocity that the interior medium body temperature of boiler tube is greater than the pipeline internal medium in the boiler tube district, rear portion of 330 DEG C is greater than 150 meter per seconds, and the residence time that the interior medium body temperature of boiler tube is greater than the process fluid in the boiler tube district, rear portion of 330 DEG C is less than 2 seconds.
6. according to the process furnace described in claim 1 or 2 or 3, it is characterized in that: boiler tube diameter is 65～150 millimeters.
7. according to the process furnace described in claim 1 or 2 or 3, it is characterized in that: boiler tube diameter is 80～125 millimeters.
8. according to the process furnace described in claim 1 or 2 or 3, it is characterized in that: furnace tube material is Cr9Mo.
9. according to the process furnace described in claim 1 or 2 or 3, it is characterized in that: furnace tube material is TP316L.
10. according to the process furnace described in claim 1 or 2 or 3, it is characterized in that: be rich in the wide fraction hydrocarbon material HDS of gluey pitch shape component, be selected from one or more in following material:
1. coalite tar or its distillate or its hot procedure gained oil product;
2. coal-tar middle oil or its distillate or its hot procedure gained oil product;
3. coal-tar heavy oil or its distillate or its hot procedure gained oil product;
4. gelatin liquefaction process gained liquefied coal coil or its distillate or its hot procedure gained oil product;
5. shale oil or its distillate or its hot procedure gained oil product;
6. tar sand basic weight oil or its hot procedure gained oil product;
7. ethylene cracking tar;
8. petroleum base wax oil thermally splitting tar;
9. petroleum base heavy oil thermal course of processing gained oil product, hot procedure is coking heavy oil process or heavy oil catalytic cracking process or heavy oil catalytic pyrolysis process;
The hydrocarbon ils of gluey pitch shape component that what 10. other aromaticity content was high be rich in.
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| CN114456826A (en) * | 2022-03-18 | 2022-05-10 | 广东江威传感科技有限公司 | Coal slurry heating reaction device |
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