CN114634821B - Carbon remover for reaction tube and steam cracking reaction system powered by electricity - Google Patents
Carbon remover for reaction tube and steam cracking reaction system powered by electricity Download PDFInfo
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- CN114634821B CN114634821B CN202210339819.5A CN202210339819A CN114634821B CN 114634821 B CN114634821 B CN 114634821B CN 202210339819 A CN202210339819 A CN 202210339819A CN 114634821 B CN114634821 B CN 114634821B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
- C10G9/16—Preventing or removing incrustation
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
- C10G9/18—Apparatus
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/24—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils by heating with electrical means
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- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention provides a carbon remover for a reaction tube and a steam cracking reaction system powered by electricity. The carbon remover for a reaction tube comprises: carbon removal ring, reciprocating mechanism, connecting rod, storage tank; the carbon removing ring is arranged in the reaction tube, the diameter of the carbon removing ring is matched with the inner diameter of the reaction tube, and the carbon removing ring is used for removing carbon deposited on the inner wall of the reaction tube; the reciprocating mechanism is connected with the carbon removing ring through the connecting rod and can drive the carbon removing ring to reciprocate in the reaction tube; the storage tank is arranged at the bottom of the reaction tube and is used for collecting removed carbon deposit. The carbon remover for the reaction tube can regularly remove carbon deposition in the reaction tube, thereby avoiding that the traditional steam cracking device can only stop production regularly to clean the carbon deposition in the reaction tube due to energy supply of fuel gas, or adding an auxiliary agent into the raw material to delay the carbon deposition of the raw material on the inner wall of the reaction tube.
Description
Technical Field
The invention relates to a carbon remover for a reaction tube and a steam cracking reaction system powered by electricity, belonging to the technical field of steam cracking.
Background
Along with the reduction of carbon reduction and emission reduction and the reduction of green electricity cost in the traditional refining industry, the green electricity energy supply steam cracking production is more and more economical, and particularly, the direct steam cracking of petroleum is used for producing trienyl triphenyl, thereby saving atmospheric and vacuum pressure, and being capable of being integrated with catalytic cracking or coking subsequently, so that the refining integration of a new process is more energy-saving and emission-reducing.
The method for steam cracking petroleum by utilizing electricity energy ensures that the traditional refining and integration process and the traditional oil refinery and olefin plant are reconfigured, thereby saving high energy consumption and atmospheric and vacuum pressure, directly steam cracking petroleum, cooling and separating cracking products, directly feeding liquid-phase products into subsequent coking or coking cracking for further processing, reconfiguring the traditional flow, sequentially processing materials from high to low, eliminating the defect of multiple temperature rise and reduction in the traditional flow, and saving more energy and reducing emission. Greatly reduces the processing amount of the traditional catalytic cracking, thereby reducing the scorching amount and CO 2 The row amplification drops.
The traditional refining integration mainly adopts light petroleum to enter steam cracking after simple distillation to produce trienol, but is difficult to implement for heavy petroleum because of serious carbon deposition of a steam cracking tube. Because the existing equipment is limited, the carbon cannot be removed in real time, so that the conventional thinking is how to avoid carbon deposition, but the existing method has various problems and is difficult to be practically applied.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a carbon remover for a reaction tube, which can remove carbon in real time, wherein the carbon remover is arranged at one end of the reaction tube (especially a steam cracking reaction tube) and can remove carbon deposit in the reaction tube in real time.
The invention also provides a steam cracking reaction system powered by electricity by adopting the reaction tube carbon remover.
In order to achieve the above object, the present invention provides a carbon remover for a reaction tube, wherein the carbon remover for a reaction tube comprises: carbon removal ring, reciprocating mechanism, connecting rod, storage tank;
in a use state, the carbon removing ring is arranged in the reaction tube, and the diameter of the carbon removing ring is matched with the inner diameter of the reaction tube and is used for removing carbon deposition on the inner wall of the reaction tube;
the reciprocating mechanism is connected with the carbon removing ring through the connecting rod and can drive the carbon removing ring to reciprocate in the reaction tube;
the storage tank is arranged at the bottom of the reaction tube and used for collecting the removed carbon deposit.
According to a specific embodiment of the present invention, preferably, the reaction tube is a steam cracking tube, or steam cracking reaction tube.
According to a specific embodiment of the present invention, preferably, the carbon removal ring is provided with a through hole. The through holes are used for enabling the removed carbon to smoothly fall down to enter the storage tank.
According to a specific embodiment of the present invention, preferably, the carbon removing ring is cylindrical with a hollow inside. The carbon removing ring can be made of high-temperature resistant materials.
According to embodiments of the present invention, the reciprocating mechanism may have different structures, and may specifically include:
the first structure: the reciprocating mechanism is a sleeve, and the sleeve is provided with a reciprocating part; one end of the connecting rod is connected with the reciprocating part, and the other end of the connecting rod is connected with the carbon removing ring; the reciprocating part is arranged in the sleeve and can drive the carbon removal ring to reciprocate through the connecting rod;
the second structure: the reciprocating mechanism comprises a bracket, a piston and two pulleys, wherein the two pulleys are respectively arranged at the upper end and the lower end of the bracket, and are connected with the piston through a belt or a chain and used for driving the piston to reciprocate, and the pulleys can be driven by a motor.
According to embodiments of the present invention, the reciprocating members within the sleeve may be selected in an appropriate manner as desired, so long as the reciprocating motion is achieved. Preferably, two ends of the sleeve are respectively provided with a first gas inlet and a second gas outlet, and the first gas inlet and the second gas outlet are used for driving the reciprocating part to reciprocate through gas; at the moment, the sleeve is a pneumatic sleeve, one end of the sleeve is air-in and the other end of the sleeve is air-out in the use process, the pneumatic pushing reciprocating part reciprocates in the sleeve, and then the connecting rod and the carbon removing ring are driven to reciprocate, and in the movement process, the carbon removing ring contacts with the inner wall of the reaction tube to scrape carbon deposit on the inner wall; or a sliding track is arranged in the sleeve, and the reciprocating component can reciprocate along the sliding track under the drive of electric power.
According to the specific embodiment of the invention, if the reaction tube is in an open environment, the reciprocating mechanism can adopt an open second structure, and the connecting rod is sealed at the position where the connecting rod enters the reaction tube, so that the gas in the reaction tube is prevented from leaking into the atmosphere.
According to the embodiment of the present invention, it is preferable that the link is made of a material having good heat insulating properties, so that the amount of reaction heat transferred through the link is small.
According to a specific embodiment of the present invention, preferably, the upper end of the storage tank is provided with an air outlet, and the lower end is provided with a discharge opening. When carbon deposit in the storage tank is accumulated to a certain amount, the carbon deposit can be discharged from the discharge opening, and gas generated in the storage tank can be discharged from the exhaust opening.
According to a specific embodiment of the present invention, the storage tank may be cylindrical, and may be made of glass, and the exterior of the storage tank may be supported by a cylindrical support made of metal.
According to an embodiment of the present invention, the reciprocating mechanism of the carbon remover may be disposed at the top of the reaction tube or at the bottom of the reaction tube.
According to a specific embodiment of the present invention, preferably, in a use state, the reciprocating mechanism is provided at the top of the reaction tube, and the storage tank is provided at the bottom of the reaction tube. Under the condition, the reciprocating mechanism drives the carbon removal ring to move up and down through the connecting rod, carbon deposition on the inner wall of the reaction tube is removed, and the carbon deposition falls down along the reaction tube and enters the storage tank.
According to a specific embodiment of the present invention, preferably, in a use state, the storage tank is provided at the bottom of the reaction tube, the reciprocator is provided at the bottom of the storage tank, and the link rod passes through the storage tank to enter the inside of the reaction tube. Under the condition, a channel for the connecting rod to pass through is arranged in the middle of the storage tank, the reciprocating mechanism drives the carbon removal ring to move up and down through the connecting rod, carbon deposition on the inner wall of the reaction tube is removed, and the carbon deposition falls down along the reaction tube and enters the storage tank.
According to a specific embodiment of the present invention, preferably, the carbon remover for a reaction tube further comprises a heat exchanger provided between the reaction tube and the reciprocating mechanism. The heat exchanger can reduce the temperature of gas entering the reciprocating mechanism from the reaction tube, and the sealing material between the connecting rod and the reaction tube is protected from failure due to high temperature. The heat exchanger can be provided with cooling fins for the outside and hollow for the inside.
According to a specific embodiment of the present invention, preferably, when the carbon remover for a reaction tube further includes a heat exchanger, in a use state, the heat exchanger is disposed at the top of the reaction tube, the reciprocating mechanism is disposed at the top of the heat exchanger, the connecting rod passes through the heat exchanger to enter the inside of the reaction tube, and the storage tank is disposed at the bottom of the reaction tube.
According to a specific embodiment of the present invention, preferably, the connection manner between the reciprocating mechanism and the reaction tube, between the reciprocating mechanism and the heat exchanger, and between the heat exchanger and the reaction tube is detachable connection, respectively.
According to a specific embodiment of the present invention, the reaction tube is preferably connected to the storage tank by a quick-opening joint type connection, which is required to ensure a certain sealing property.
According to the specific embodiment of the invention, the carbon remover for the reaction tube is preferably provided with a corresponding PLC (programmable logic controller), the operation of the carbon remover is controlled by the PLC, and the operation speed and the operation frequency of the carbon remover can be automatically regulated according to the process conditions so as to ensure that carbon deposit generated in the reaction process can be rapidly removed, thereby enabling the steam cracking reaction tube to operate for a long period.
The invention also provides a steam cracking reaction system powered by electricity, wherein the steam cracking reaction system powered by electricity comprises a steam cracking reaction device, power supply equipment, a reaction tube and the carbon remover for the reaction tube; wherein:
the reaction tube is arranged in the steam cracking reaction device and is provided with a carbon remover for the reaction tube;
the power supply equipment comprises a power supply, a capacitor and an induction coil, wherein the induction coil is wound outside the reaction tube.
According to a specific embodiment of the present invention, preferably, an anti-carbon layer is provided inside the reaction tube.
According to a specific embodiment of the present invention, preferably, the carbon deposition preventing layer is a crystalline film, and more preferably, the material of the crystalline film is silicon or a silicon-containing substance. The crystalline film may be formed by spraying silicon or a silicon-containing substance.
According to a specific embodiment of the present invention, preferably, the material of the anti-carbon deposition layer is a carbonaceous material.
According to a specific embodiment of the present invention, preferably, the electric energy is used to heat the steam cracking reaction tube through the induction coil, and heat is supplied to the cracking raw material through the reaction tube. After the induction coil is electrified, electromagnetic induction is generated between the steam cracking reaction tube and the induction coil, and the steam cracking reaction tube generates heat, so that the cracking raw material inside the steam cracking reaction tube is heated. Wherein, the induction coil is preferably wound outside the steam cracking reaction tube, and the induction coil and the steam cracking reaction tube can be filled with heat insulation materials (such as cement, fireproof materials and the like). The conventional steam cracking device provides heat through the combustion of fuel oil and fuel gas, and then the heat of the reaction tube is realized through heat exchange with the reaction tube, so that cracking raw materials in the reaction tube are heated, however, the heat exchange is often uneven, the heat is concentrated in a local area, and the cracking reaction is uneven. The induction coil is used for heating the reaction tube, the heating efficiency is high, the induction coils are uniformly distributed in the reaction tube, the reaction tube can uniformly generate electromagnetic induction, and the cracking raw material is uniformly heated.
According to a specific embodiment of the present invention, preferably, the power source is an intermediate frequency power source or a high frequency power source, that is, the frequency of the current input to the induction coil is an intermediate frequency or a high frequency, so as to meet the requirements of electromagnetic induction and control of the reaction temperature, and in the implementation process, the frequency of the control current can be selected according to the required reaction temperature. Wherein the high frequency is 5-20KHz, preferably 8-16KHz, more preferably 10-15KHz, further preferably 12-14KHz, and can be specifically 8KHz, 8.5KHz, 9KHz, 9.5KHz, 10KHz, 10.5KHz, 11KHz, 11.5KHz, 12KHz, 12.5KHz, 13KHz, 13.5KHz, 14KHz, 14.5KHz, 15KHz, 15.5KHz, 16KHz, or the ranges obtained by combining the above ranges with specific frequency values, such as 5-16KHz, 5-15KHz, 5-10KHz, 8-20KHz, 8-15KHz, 8-10KHz, 10-20KHz, 10-16KHz, 10-12KHz, 9-20KHz, 9-15KHz, 12-14, 12-20KHz; the intermediate frequency is 50-3000Hz, preferably 300-2000Hz, more preferably 600-1500Hz, and can be 300Hz, 400Hz, 500Hz, 600Hz, 700Hz, 800Hz, 900Hz, 1000Hz, 1100Hz, 1200Hz, 1300Hz, 1400Hz, 1500Hz, 1600Hz, 1700Hz, 1800Hz, 1900Hz, 2000Hz, or can be the range obtained by combining the endpoints of the above ranges and the specific frequency values, such as 300-3000Hz, 300-1500Hz, 600-3000Hz, 600-2000Hz, 1000-3000Hz, 1000-2000Hz, 1200-3000Hz, 1200-2000Hz, 1500-3000Hz, 1500-2000Hz, etc.
According to a specific embodiment of the present invention, preferably, the induction coil is connected to the power supply to form a loop, and the power supply is connected in parallel to the capacitor. The frequency of the current input to the induction coil can be adjusted by a power supply and a capacitor.
The power source used in the present invention may be a commonly used industrial power source such as an intermediate frequency power source, a high frequency power source. The power and other specification parameters of the power supply can be selected according to the frequency to which the power is required to be regulated, and the rated power of the power supply is preferably 100-1000KW, more preferably 200-500KW. The specification of the capacitor can be selected according to the requirement, and the capacitor can be matched with a power supply to meet the frequency control requirement.
According to a specific embodiment of the present invention, preferably, the induction coil is selected from one or a combination of two or more of ferrite coil, iron core coil, air core coil, copper core coil, and the like.
According to embodiments of the present invention, the cracking feedstock employed in the electrically powered steam cracking reaction system of the present invention may include naphthenes and/or cyclic olefins; preferably, the cycloalkane is a C4-C8 cycloalkane, more preferably cyclohexane; the cycloolefin is a C4-C8 cycloolefin, more preferably cyclohexene.
According to a specific embodiment of the present invention, the reaction temperature of the steam cracking reaction in the steam cracking reaction system using electric power of the present invention is preferably controlled to 500 to 1200 ℃, more preferably 700 to 900 ℃, still more preferably 750 to 850 ℃.
According to a specific embodiment of the present invention, the steam cracking reaction in the steam cracking reaction system using electricity according to the present invention preferably has a water-to-oil ratio of 0.3 to 0.7, more preferably 0.4 to 0.5.
According to the specific embodiment of the invention, the size of the steam cracking reaction tube adopted by the invention can be selected according to the needs, wherein the inner diameter of the steam cracking reaction tube can be 50-250mm, and the length of the steam cracking reaction tube can be selected according to the needs of the reaction.
According to embodiments of the present invention, the material of the steam cracking reaction tube may be a metal or an alloy, including but not limited to materials commonly used for steam cracking reaction tubes. The metal or alloy is preferably a metal or alloy capable of withstanding temperatures of 1000 ℃, more preferably a metal or alloy capable of withstanding temperatures of 1200 ℃. The steam cracking reaction tube of the invention can be made of 316L stainless steel, 304S stainless steel, HK40 high-temperature furnace tube material, HP Micro Alloy steel or Manaurite XTM steam cracking furnace material, etc.
Along with the increasing requirements of low carbonization in the traditional industry and the decrease of green electricity cost, the energy supply of the traditional steam cracking furnace is possible by using green electricity to replace the traditional steam cracking furnace, particularly the electromagnetic coupling energy supply steam cracking furnace tube is used, so that the traditional steam cracking furnace tube obtains larger space freedom degree, each steam cracking furnace tube is an independent reaction system, compared with the traditional steam cracking furnace for supplying energy, the multitube cracking furnace tube is in a furnace chamber, the peripheral space of each steam cracking furnace tube for electromagnetic energy supply is free, and the carbon deposit in the reaction tube can be removed in real time by providing the carbon remover for the reaction tube provided by the invention at two ends or one end of each reaction tube, thereby avoiding the situation that the traditional steam cracking device can only periodically stop producing and clean the carbon deposit in the reaction tube due to the energy supply of fuel gas or adding an auxiliary agent into the raw material to delay the carbon deposit of the raw material on the inner wall of the reaction tube.
Drawings
FIG. 1 is a schematic view showing the structure of a carbon remover for a reaction tube in example 1.
FIG. 2 is a schematic structural view of a carbon remover for a reaction tube of example 2.
FIG. 3 is a schematic view showing the state of use of the carbon remover for a reaction tube of example 2.
FIG. 4 is a schematic structural view of a carbon remover for a reaction tube of example 3.
FIG. 5 is a schematic view showing the structure of a carbon remover for a reaction tube in example 4.
Reference numerals illustrate:
sleeve 1, first gas inlet and outlet 11, second gas inlet and outlet 12, connecting rod 2, carbon removing ring 3, storage tank 4, exhaust port 41, discharge port 42, reaction tube 5, raw material inlet 51, product outlet 52, heat exchanger 6, bracket 7, piston 71, pulley 72, belt 73, pulley 74
Detailed Description
The technical solution of the present invention will be described in detail below for a clearer understanding of technical features, objects and advantageous effects of the present invention, but should not be construed as limiting the scope of the present invention.
Example 1
This example provides a carbon remover for reaction tubes, the structure of which is shown in FIG. 1. The carbon remover for the reaction tube comprises a sleeve 1, a connecting rod 2, a carbon removing ring 3 and a storage tank 4; wherein:
one end of the connecting rod 2 is connected with a reciprocating part in the sleeve 1, and the other end is connected with the carbon removing ring 3;
the two ends of the sleeve 1 are respectively provided with a first gas inlet and outlet 11 and a second gas inlet and outlet 12, and are used for inputting gas to drive the reciprocating part to reciprocate up and down;
the storage tank 4 is cylindrical made of glass, is externally supported by a cylindrical support made of metal, and is provided with an exhaust port 41 at the upper end and a discharge port 42 at the lower end.
In the use state, the sleeve 1 is arranged at the upper end of the reaction tube, and the joint of the sleeve and the reaction tube adopts a detachable sealing connection mode; the carbon removal ring 3 is arranged inside the reaction tube, can reciprocate under the drive of the reciprocating component and the connecting rod 2, removes carbon deposition on the inner wall of the reaction tube in the motion process, and falls down along the reaction tube to enter the storage tank 4.
Example 2
This example provides a carbon remover for reaction tubes, the structure of which is shown in FIG. 2. The carbon remover for the reaction tube comprises a sleeve 1, a connecting rod 2, a carbon removing ring 3, a storage tank 4 and a heat exchanger 6; wherein:
one end of the connecting rod 2 is connected with a reciprocating part in the sleeve 1, and the other end is connected with the carbon removing ring 3;
the two ends of the sleeve 1 are respectively provided with a first gas inlet and outlet 11 and a second gas inlet and outlet 12, and are used for inputting gas to drive the reciprocating part to reciprocate up and down;
the storage tank 4 is cylindrical made of glass, is externally supported by a cylindrical support made of metal, and is provided with an exhaust port 41 at the upper end and a discharge port 42 at the lower end;
the heat exchanger 6 is provided with heat exchange plates at the outer side of the middle part, and the inside is hollow.
In a use state (as shown in fig. 3), the sleeve 1 is arranged at the upper end of the heat exchanger 6, and the sleeve and the heat exchanger are in a detachable sealing connection mode;
the bottom end of the heat exchanger 6 and the top end of the reaction tube 5 are in a detachable sealing connection mode;
the connecting rod 2 passes through the heat exchanger 6 to enter the reaction tube 5 and is connected with the carbocycle removing ring 3 arranged in the reaction tube 5;
the reaction tube 5 is provided with a raw material inlet 51 and a product outlet 52 for inputting steam cracking raw material and outputting steam cracking products, respectively.
Example 3
This example provides a carbon remover for reaction tubes, the structure of which is shown in FIG. 4. The carbon remover for the reaction tube comprises a reciprocating mechanism, a connecting rod 2, a carbon removing ring 3 and a storage tank 4; wherein:
the reciprocating mechanism comprises a bracket 7, a piston 71, two pulleys 72, a belt 73 and a belt pulley 74, wherein the two pulleys 72 are respectively fixed at the upper end and the lower end of the bracket 7, and are connected with the piston 71 through the belt 73 and the belt pulley 74, and one of the two pulleys 72 is connected with a motor;
the storage tank 4 is cylindrical made of glass, is externally supported by a cylindrical support made of metal, and is provided with an exhaust port 41 at the upper end and a discharge port 42 at the lower end;
one end of the connecting rod 2 is connected to the piston 71, and the other end is connected to the carbon removing ring 3.
In the use state, the bracket 7 is arranged at the top end of the reaction tube 5;
the connecting rod 2 passes through the heat exchanger 6 to enter the reaction tube 5 and is connected with the carbocycle removing ring 3 arranged in the reaction tube 5; the motor drives the pulley 72 to rotate, so that the piston 71 reciprocates up and down, and the carbocycle removing ring 3 is driven by the connecting rod 2 to reciprocate up and down;
the reaction tube 5 is provided with a raw material inlet 51 and a product outlet 52 for inputting steam cracking raw material and outputting steam cracking products, respectively.
Example 4
This example provides a carbon remover for reaction tubes, the structure of which is shown in FIG. 5. The carbon remover for the reaction tube comprises a reciprocating mechanism, a connecting rod 2, a carbon removing ring 3 and a heat exchanger 6; wherein:
the reciprocating mechanism comprises a bracket 7, a piston 71, two pulleys 72, a belt 73 and a belt pulley 74, wherein the two pulleys 72 are respectively fixed at the upper end and the lower end of the bracket 7, and are connected with the piston 71 through the belt 73 and the belt pulley 74, and one of the two pulleys 72 is connected with a motor;
one end of the connecting rod 2 is connected with the piston 71, and the other end is connected with the carbon removing ring 3;
the storage tank 4 is cylindrical made of glass, is externally supported by a cylindrical support made of metal, and is provided with an exhaust port 41 at the upper end and a discharge port 42 at the lower end;
the heat exchanger 6 is provided with heat exchange plates at the outer side of the middle part, and the inside is hollow.
In the use state, the bracket 7 is arranged at the top end of the reaction tube 5;
the connecting rod 2 is arranged at the upper end of the heat exchanger 6;
the bottom end of the heat exchanger 6 and the top end of the reaction tube 5 are in a detachable sealing connection mode;
the connecting rod 2 passes through the heat exchanger 6 to enter the reaction tube 5 and is connected with the carbocycle removing ring 3 arranged in the reaction tube 5;
the reaction tube 5 is provided with a raw material inlet 51 and a product outlet 52 for inputting steam cracking raw material and outputting steam cracking products, respectively.
Example 5
The embodiment provides a steam cracking reaction system powered by electricity, wherein the steam cracking reaction system powered by electricity comprises a steam cracking reaction device, power supply equipment, a reaction tube, a carbon remover for the reaction tube and a PLC; wherein:
the carbon remover for the reaction tube is the carbon remover for the reaction tube provided in examples 1 to 4;
the reaction tube is made of metal, is in the shape of a cylinder with uniform wall thickness and hollow inside, is arranged in the steam cracking reaction device, and is provided with a carbon remover;
the power supply equipment comprises a power supply, a capacitor and an induction coil, wherein the induction coil is wound outside the reaction tube;
the PLC is connected with power supply equipment and a carbon remover for the reaction tube, and is also connected with a thermocouple arranged in the reaction tube, a detector at the inlet and the outlet of the reaction tube and the like so as to monitor the progress state of the steam cracking reaction and determine proper carbon removal time.
When the steam cracking reaction system powered by electricity is adopted for steam cracking reaction, carbon removal work can be carried out in real time according to the requirement, and the operation speed and the operation frequency of the steam cracking reaction system can be controlled by a PLC (programmable logic controller) to be automatically regulated according to the process conditions, so that carbon deposition generated in the reaction process can be rapidly removed, and the steam cracking reaction tube can be operated for a long period.
Example 6
The embodiment provides a steam cracking reaction system powered by electricity, wherein the inner wall of a reaction tube is provided with a crystallization film made of an anti-corrosion and anti-carbon-deposition material, the main component is silicon, and other structures are the same as those in embodiment 5.
Example 7
The embodiment provides a steam cracking reaction system powered by electricity, wherein a protective layer made of an anti-corrosion and anti-carbon-deposition material is arranged on the inner wall of a reaction tube, the main component is a carbonaceous material, and other structures are the same as those in embodiment 5.
Claims (27)
1. The steam cracking reaction system powered by electricity is characterized by comprising a steam cracking reaction device, power supply equipment, a reaction tube and a carbon remover for the reaction tube; wherein:
the reaction tube is arranged in the steam cracking reaction device and is provided with a carbon remover for the reaction tube;
the power supply equipment comprises a power supply, a capacitor and an induction coil, wherein the induction coil is wound outside the reaction tube; the induction coil is connected with the power supply to form a loop, and the power supply is connected with the capacitor in parallel;
the carbon remover for the reaction tube comprises: carbon removal ring, reciprocating mechanism, connecting rod, storage tank;
in a use state, the carbon removing ring is arranged in the reaction tube, and the diameter of the carbon removing ring is matched with the inner diameter of the reaction tube and is used for removing carbon deposition on the inner wall of the reaction tube;
the reciprocating mechanism is connected with the carbon removing ring through the connecting rod and can drive the carbon removing ring to reciprocate in the reaction tube; wherein, the connecting rod is made of a material with good heat insulation performance, and the carbon removal ring is made of a high-temperature-resistant material;
the storage tank is arranged at the bottom of the reaction tube and is used for collecting removed carbon deposit;
the carbon remover for the reaction tube further comprises a heat exchanger, wherein the heat exchanger is arranged between the reaction tube and the reciprocating mechanism;
when the steam cracking reaction system powered by electricity is used for steam cracking reaction, carbon removal work is carried out in real time according to the requirement, so that the steam cracking reaction tube can run for a long period.
2. The steam cracking reaction system according to claim 1, wherein the carbon removing ring is provided with a through hole.
3. The steam cracking reaction system of claim 1, wherein the reciprocating mechanism is a sleeve provided with reciprocating members;
one end of the connecting rod is connected with the reciprocating part, and the other end of the connecting rod is connected with the carbon removing ring;
the reciprocating part is arranged in the sleeve, and can drive the carbon removal ring to reciprocate through the connecting rod.
4. A steam cracking reaction system according to claim 3, wherein the sleeve is provided with a first gas inlet and a second gas outlet at both ends thereof, respectively, for driving the reciprocating member to reciprocate by gas; or a sliding track is arranged in the sleeve, and the reciprocating component can reciprocate along the sliding track under the drive of electric power.
5. The steam cracking reaction system according to claim 1, wherein the reciprocating mechanism comprises a bracket, a piston and two pulleys, the two pulleys are respectively arranged at the upper end and the lower end of the bracket, and the two pulleys are connected with the piston through a belt or a chain and are used for driving the piston to reciprocate.
6. The steam cracking reaction system according to claim 1, wherein the upper end of the storage tank is provided with an exhaust port, and the lower end is provided with a discharge port.
7. The steam cracking reaction system according to any one of claims 1 to 6, wherein in a use state, the reciprocating mechanism is provided at a top of the reaction tube, and the storage tank is provided at a bottom of the reaction tube;
or in the use state, the storage tank is arranged at the bottom of the reaction tube, the reciprocating mechanism is arranged at the bottom of the storage tank, and the connecting rod penetrates through the storage tank to enter the reaction tube.
8. The steam cracking reaction system according to claim 1, wherein in a use state, the heat exchanger is provided at a top of the reaction tube, the reciprocating mechanism is provided at a top of the heat exchanger, the connecting rod passes through the heat exchanger to enter an inside of the reaction tube, and the storage tank is provided at a bottom of the reaction tube.
9. The electrically powered steam cracking reaction system of claim 1 wherein said reaction tube is internally provided with an anti-carbon layer.
10. The electrically powered steam cracking reaction system of claim 9 wherein said anti-carbon layer is a crystalline film.
11. The electrically powered steam cracking reaction system of claim 10 wherein said crystalline film material is a silicon-containing substance.
12. The electrically powered steam cracking reaction system of claim 11 wherein said silicon-containing material is silicon.
13. The electrically powered steam cracking reaction system of claim 9 wherein said carbon deposit preventing layer is a carbonaceous material.
14. The electrically powered steam cracking reaction system of claim 1 wherein said power source is an intermediate frequency power source or a high frequency power source, wherein said high frequency is 5-20KHz; the intermediate frequency is 50-3000Hz.
15. The electrically powered steam cracking reaction system of claim 14 wherein said high frequency is 8-16KHz.
16. The electrically powered steam cracking reaction system of claim 14 wherein said high frequency is 10-15KHz.
17. The electrically powered steam cracking reaction system of claim 14 wherein said intermediate frequency is 300-2000Hz.
18. The electrically powered steam cracking reaction system of claim 14 wherein said power source has a power of 100-1000KW.
19. The electrically powered steam cracking reaction system of claim 18 wherein said power source has a power of 200-500KW.
20. The electrically powered steam cracking reaction system of claim 14 wherein said induction coil is selected from one or a combination of two or more of ferrite coils, iron core coils, air core coils, copper core coils.
21. The electrically powered steam cracking reaction system of claim 14 wherein said reaction tube is metallic.
22. The electrically powered steam cracking reaction system of claim 14 wherein said reaction tube is an alloy.
23. The electrically powered steam cracking reaction system of claim 21 wherein said metal is a metal capable of withstanding temperatures of 1000 ℃.
24. The electrically powered steam cracking reaction system of claim 22 wherein said alloy is an alloy capable of withstanding temperatures of 1000 ℃.
25. The electrically powered steam cracking reaction system of claim 21 wherein said metal is a metal capable of withstanding a temperature of 1200 ℃.
26. The electrically powered steam cracking reaction system of claim 22 wherein said alloy is an alloy capable of withstanding a temperature of 1200 ℃.
27. The electrically powered steam cracking reaction system of claim 14 wherein said reaction tube is selected from the group consisting of 316L stainless steel, 304S stainless steel, HK40 high temperature furnace tube material, HP Micro Alloy steel, and Manaurite XTM steam cracking furnace material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210339819.5A CN114634821B (en) | 2022-04-01 | 2022-04-01 | Carbon remover for reaction tube and steam cracking reaction system powered by electricity |
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| CN202210339819.5A CN114634821B (en) | 2022-04-01 | 2022-04-01 | Carbon remover for reaction tube and steam cracking reaction system powered by electricity |
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| CN114634821B true CN114634821B (en) | 2023-10-13 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2600641A1 (en) * | 1986-06-25 | 1987-12-31 | Naphtachimie Sa | Process and furnace for steam cracking of gaseous hydrocarbons intended for the manufacture of olefins and diolefins |
| CN112662409A (en) * | 2020-12-22 | 2021-04-16 | 浙江圣沐新能源有限公司 | Cracking conversion device for producing carbon and processing technology thereof |
| CN215517509U (en) * | 2021-08-03 | 2022-01-14 | 中国石油大学(北京) | Production system of gas-based direct reduced iron |
-
2022
- 2022-04-01 CN CN202210339819.5A patent/CN114634821B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2600641A1 (en) * | 1986-06-25 | 1987-12-31 | Naphtachimie Sa | Process and furnace for steam cracking of gaseous hydrocarbons intended for the manufacture of olefins and diolefins |
| CN112662409A (en) * | 2020-12-22 | 2021-04-16 | 浙江圣沐新能源有限公司 | Cracking conversion device for producing carbon and processing technology thereof |
| CN215517509U (en) * | 2021-08-03 | 2022-01-14 | 中国石油大学(北京) | Production system of gas-based direct reduced iron |
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| CN114634821A (en) | 2022-06-17 |
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