CN113070000A - Thermal cracking reaction method of self-adaptive reaction furnace with variable inner chamber shape - Google Patents
Thermal cracking reaction method of self-adaptive reaction furnace with variable inner chamber shape Download PDFInfo
- Publication number
- CN113070000A CN113070000A CN202110375632.6A CN202110375632A CN113070000A CN 113070000 A CN113070000 A CN 113070000A CN 202110375632 A CN202110375632 A CN 202110375632A CN 113070000 A CN113070000 A CN 113070000A
- Authority
- CN
- China
- Prior art keywords
- furnace body
- polypropylene
- polyethylene
- thermal cracking
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 117
- 238000004227 thermal cracking Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000376 reactant Substances 0.000 claims abstract description 118
- 239000004698 Polyethylene Substances 0.000 claims description 136
- 239000004743 Polypropylene Substances 0.000 claims description 136
- -1 polypropylene Polymers 0.000 claims description 134
- 229920000573 polyethylene Polymers 0.000 claims description 115
- 229920001155 polypropylene Polymers 0.000 claims description 115
- 230000007246 mechanism Effects 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 13
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 12
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000004793 Polystyrene Substances 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 7
- 229920002223 polystyrene Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 description 14
- 238000004088 simulation Methods 0.000 description 14
- 239000000047 product Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 238000005336 cracking Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 208000012839 conversion disease Diseases 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010920 waste tyre Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/008—Pyrolysis reactions
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
- C01B3/24—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons
-
- 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
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/10—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a thermal cracking reaction method of a self-adaptive reaction furnace with a variable inner chamber shape, which comprises the following steps: according to the components of reactants entering the thermal cracking reaction furnace body, the inner cavity body of the thermal cracking reaction furnace is changed, and the thermal cracking reaction furnace adapts to the reaction environment of different reactant components. The invention realizes that different reactants can reach the optimal product conversion rate in the furnace body, and improves the conversion rate of the reactants in the furnace body.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a thermal cracking reaction method of a self-adaptive reaction furnace with a variable inner chamber shape.
Background
The thermal cracking process has been widely used in chemical industry, such as the industrial oil refining industry of waste tires and plastics, the sources of reactants are wide and complex, and the reactants fed into the furnace in each batch have variability in composition. However, the internal shape of the conventional thermal cracking furnace is not adjustable, so that when the components of the reactants are changed and are separated from the expected values of the design of the reaction furnace, the reaction environment formed in the furnace does not meet the optimal reaction requirements of new raw material components, the reaction conversion rate is low, more by-products with low utilization value are generated, and the production benefit is influenced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a thermal cracking reaction method of an adaptive reaction furnace with a variable inner chamber shape aiming at the defects in the prior art, so that the optimal product conversion rate of different reactants in a furnace body can be achieved, and the conversion rate of the reactants in the furnace body is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a thermal cracking reaction method of a self-adaptive reaction furnace with a variable inner chamber shape comprises the following steps: according to the components of reactants entering the thermal cracking reaction furnace body, the inner cavity body of the thermal cracking reaction furnace is changed, and the thermal cracking reaction furnace adapts to the reaction environment of different reactant components.
According to the technical scheme, a sleeve is sleeved in the thermal cracking reaction furnace body and can move up and down along the furnace body;
according to the components of reactants entering the thermal cracking reaction furnace body, the inner cavity body of the thermal cracking reaction furnace is changed, and the specific process comprises the following steps: and detecting the components of the reactants entering the furnace body through a detection system, and moving the position of the adjusting sleeve in the furnace body according to the detected information of the components of the reactants.
According to the technical scheme, the sleeve is connected with a sleeve position adjusting mechanism, the sleeve position sleeving mechanism is connected with a control system, the control system is connected with a detection system,
according to the components of reactants entering the thermal cracking reaction furnace body, the inner cavity body of the thermal cracking reaction furnace is changed, and the specific process comprises the following steps: transmitting the information of the components of the reactant detected to enter the furnace body to a control system through a detection system; and the control system adjusts the position of the sleeve in the furnace body up and down through the sleeve position adjusting mechanism according to the reactant component information.
According to the technical scheme, when the reactant entering the furnace body is detected to be acetylene, the adjusting sleeve is moved to a position which is located in the furnace body and is 20% -30% of the total length of the inner cavity of the furnace body from the top of the inner cavity of the furnace body.
According to the technical scheme, when the reactant entering the furnace body is a mixture of blended polypropylene PP, polyethylene PE and polystyrene PS, the adjusting sleeve moves to a position in the furnace body and is 25-50% of the total length of the inner cavity of the furnace body away from the top of the inner cavity of the furnace body.
According to the technical scheme, when the reactant entering the furnace body is a mixture of blended polypropylene (PP) and Polyethylene (PE), the adjusting sleeve moves to a position in the furnace body and is 27-50% of the total length of the inner cavity of the furnace body away from the top of the inner cavity of the furnace body.
According to the technical scheme, when all the components of reactants entering the furnace body are polypropylene PP, the adjusting sleeve moves to a position in the furnace body and is 27% of the total length of the inner cavity of the furnace body away from the top of the inner cavity of the furnace body;
when the numerical ratio of polypropylene PP to polyethylene PE in reactant components entering the furnace body is 07:03, the adjusting sleeve moves to a position in the furnace body and is 30% of the total length of the inner cavity of the furnace body away from the top of the inner cavity of the furnace body;
when the numerical ratio of polypropylene PP to polyethylene PE in reactant components entering the furnace body is 05:05, the adjusting sleeve is moved to be positioned in the furnace body and the distance from the top of the inner cavity of the furnace body is 35% of the total length of the inner cavity of the furnace body;
when the numerical ratio of polypropylene PP to polyethylene PE in reactant components entering the furnace body is 03:07, the adjusting sleeve moves to a position in the furnace body and is 40% of the total length of the inner cavity of the furnace body away from the top of the inner cavity of the furnace body;
when all the reactant components entering the furnace body are polyethylene PE, the adjusting sleeve moves to be positioned in the furnace body and is 50% of the total length of the inner cavity of the furnace body away from the top of the inner cavity of the furnace body.
According to the technical scheme, when the numerical ratio of the polypropylene PP to the polyethylene PE in the reactant components entering the furnace body is not in the existing proportion, linear interpolation calculation is carried out by selecting the components falling into the corresponding interval, and the calculation process is as follows:
the numerical ratio of polypropylene PP to polyethylene PE is a: b, wherein a + b is 10;
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 10:00 (i.e. the reactant component is entirely polypropylene PP) and the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 07:03, X10 + Y7 ═ a, X0 + Y3 ═ b, the conversion is (27% × X + 30% ×);
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the ratio of polypropylene PP to polyethylene PE in the reactant component is 07:03 and the ratio of polypropylene PP to polyethylene PE in the reactant component is 05:05, X7 + Y5 ═ a, X3 + Y5 ═ b, the conversion is (30% × X + 35% ×);
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 05:05 and the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 03:07, X5 + Y3 ═ a, X5 + Y7 ═ b, the conversion is (35% X + 40% Y);
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 03:07 and the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 00:10 (i.e., the reactant components are all polyethylene PE), the conversion is (40% × X + 50% × Y) when X × 3+ Y0 ═ a and X × 7+ Y10 ═ b.
According to the technical scheme, the furnace body is spirally provided with a guide groove, the outer wall of the sleeve is connected with a support rod, and the support rod is arranged in the guide groove;
the sleeve position adjusting mechanism comprises a transmission mechanism and a driving motor, and the driving motor is connected with the supporting rod through the transmission mechanism and drives the supporting rod to move along the guide groove.
According to the technical scheme, the transmission mechanism comprises a limiting slide block, an annular guide rail, a gear and a gear ring, wherein a limiting slide groove arranged along the length direction of the furnace body is formed in the limiting slide block; the driving motor drives the gear to rotate, the gear ring acts on the gear in a reverse direction, the gear drives the driving motor and the limiting slide block to rotate around the furnace body along the annular guide rail, and the limiting slide block drives the supporting rod to move along the guide groove.
The invention has the following beneficial effects:
the invention changes the inner chamber of the reaction furnace from single shape to variable shape, changes the distribution of the flow field and the temperature field in the furnace body, leads the reaction environment in the furnace to approach the optimal reaction environment of the current reactant components all the time, realizes that different reactants can reach the optimal product conversion rate in the furnace body, improves the conversion rate of the reactants in the furnace body, effectively inhibits the reduction of the conversion rate and the production benefit caused by the change of the reactant components, is suitable for the cracking industry, and is particularly suitable for the cracking industry of waste plastic garbage cracking refined oil and the like which has the characteristics of uncertain mixing of feeding components and different optimal cracking conditions of each component.
Drawings
FIG. 1 is a schematic structural view of an adaptive reaction furnace with a variable inner chamber shape according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a sleeve position adjusting mechanism in the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a simulation five sets of furnace body cavity models for thermal cracking of acetylene according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating conversion rates corresponding to five sets of furnace body cavity models for acetylene thermal cracking simulation in accordance with an embodiment of the present invention;
FIG. 5 is a graph showing the conversion of polypropylene PP and polyethylene PE in different blending ratios according to a second embodiment of the present invention;
in the figure, 1-a material inlet, 2-a gas overflow outlet, 3-a furnace body, 4-a sleeve, 5-a support rod, 6-a guide groove, 7-a driving motor, 8-a gear, 9-a limiting slide block, 10-a limiting chute, 11-an upper guide rail, 12-a lower guide rail and 13-a gear ring;
model a-0, model b-1, model c-2, model d-3 and model e-4.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 to 2, a thermal cracking reaction method of an adaptive reaction furnace with a variable inner chamber shape according to an embodiment of the present invention includes the following steps: according to the components of reactants entering the thermal cracking reaction furnace body 3, the inner cavity shape of the thermal cracking reaction furnace is changed, and the optimal reaction environment of different reactant components is adapted; according to the detection of different components of reactants entering the furnace body 3, the flow field and the temperature field in the furnace are changed by changing the chamber shape in the reaction furnace, so that the optimal reaction environment can be still created when the reaction furnace faces different components of the reactants; compared with the existing widely-used invariable cavity furnace, the furnace has higher conversion rate and production benefit; according to the components of reactants at the feed inlet 1, the embedded structure of the large sleeve 4 and the small sleeve 4 is decided and controlled by the background data end, the shape of the inner cavity of the reaction furnace is adaptively changed, and further the flow field and the temperature field in the furnace are changed, so that the optimal reaction environment can be still created when the reaction furnace faces different reactant components. Compared with the existing widely-used invariable cavity furnace, the furnace has higher conversion rate and production benefit; the different reactants described herein include not only reactants of different compositions, but also reactants in which a plurality of compositions are mixed in different proportions.
Furthermore, a sleeve 4 is sleeved in the thermal cracking reaction furnace body 3, and the sleeve 4 can move up and down along the furnace body 3;
according to the components of reactants entering the thermal cracking reaction furnace body 3, the inner cavity shape of the thermal cracking reaction furnace is changed, and the specific process comprises the following steps: detecting the components of the reactant entering the furnace body 3 through a detection system, and moving the position of the adjusting sleeve 4 in the furnace body 3 according to the detected component information of the reactant; the detection system is used for detecting the components of reactants entering the furnace body 3 for thermal cracking.
Further, the detection system is a chemical composition analyzer.
Further, the sleeve 4 is connected with a sleeve position adjusting mechanism, the sleeve position sleeving mechanism is connected with a control system, the control system is connected with a detection system,
according to the components of reactants entering the thermal cracking reaction furnace body 3, the inner cavity shape of the thermal cracking reaction furnace is changed, and the specific process comprises the following steps: transmitting the information of the components of the reactant detected to enter the furnace body 3 to the control system through the detection system; the control system adjusts the position of the sleeve 4 in the furnace body 3 up and down through the sleeve position adjusting mechanism according to the component information of the reactant.
Furthermore, a background database is arranged in the control system, the database is established by a previous simulation or simulation test, the corresponding optimal sleeve 4 position can be obtained when different reactant components exist, an optimal reaction environment is established, and the optimal product conversion rate of the corresponding reactant is achieved; and the control system matches the detected data with a background database according to the reactant component information, and moves the sleeve 4 to the corresponding sleeve 4 position in the database.
Further, when detecting that the reactant component entering the furnace body 3 is acetylene, the adjusting sleeve 4 is moved to a position which is located in the furnace body 3 and is 20% -30% of the total length of the inner cavity of the furnace body 3 away from the top of the inner cavity of the furnace body 3, and the best choice is that the sleeve 4 is located in the furnace body 3 and is 25% of the total length of the inner cavity of the furnace body 3 away from the top of the inner cavity of the furnace body 3.
Further, when the reactant composition entering the furnace body 3 is a mixture of blended polypropylene PP, polyethylene PE and polystyrene PS, the adjusting sleeve 4 moves to a position in the furnace body 3 and is 25-50% of the total length of the inner cavity of the furnace body 3 away from the top of the inner cavity of the furnace body 3.
Further, when reactant components entering the furnace body 3 are blended polypropylene PP and polyethylene PE, the adjusting sleeve 4 moves to be positioned in the furnace body 3 and is 27-50% of the total length of the inner cavity of the furnace body 3 away from the top of the inner cavity of the furnace body 3.
When all the reactant components entering the furnace body 3 are polypropylene PP, the adjusting sleeve 4 moves to be positioned in the furnace body 3 and is 27% of the total length of the inner cavity of the furnace body 3 away from the top of the inner cavity of the furnace body 3;
when the numerical ratio of polypropylene PP to polyethylene PE in reactant components entering the furnace body 3 is 07:03, the adjusting sleeve 4 moves to be positioned in the furnace body 3 and is 30% of the total length of the inner cavity of the furnace body 3 away from the top of the inner cavity of the furnace body 3;
when the numerical ratio of polypropylene PP to polyethylene PE in reactant components entering the furnace body 3 is 05:05, the adjusting sleeve 4 moves to be positioned in the furnace body 3 and is 35% of the total length of the inner cavity of the furnace body 3 away from the top of the inner cavity of the furnace body 3;
when the numerical ratio of polypropylene PP to polyethylene PE in reactant components entering the furnace body 3 is 03:07, the adjusting sleeve 4 moves to be positioned in the furnace body 3 and is 40% of the total length of the inner cavity of the furnace body 3 away from the top of the inner cavity of the furnace body 3;
when all the reactant components entering the furnace body 3 are polyethylene PE, the adjusting sleeve 4 moves to be positioned in the furnace body 3 and is 50% of the total length of the inner cavity of the furnace body 3 away from the top of the inner cavity of the furnace body 3.
Furthermore, a guide groove 6 is spirally arranged on the furnace body 3, a support rod 5 is connected to the outer wall of the sleeve 4, the support rod 5 is arranged in the guide groove 6, the sleeve 4 spirally rotates along the guide groove 6 to lift in the furnace body 3, and the sleeve 4 is prevented from being deposited between the sleeve 4 and the furnace wall for a long time through compound motion to be blocked;
the sleeve position adjusting mechanism comprises a transmission mechanism and a driving motor 7, and the driving motor 7 is connected with the supporting rod 5 through the transmission mechanism and drives the supporting rod 5 to move along the guide groove 6.
Furthermore, the transmission mechanism comprises a limiting slide block 9, an annular guide rail, a gear 8 and a gear ring 13, a limiting slide groove 10 arranged along the length direction of the furnace body 3 is arranged on the limiting slide block 9, the annular guide rail is annularly sleeved outside the furnace body 3, the limiting slide block 9 is arranged on the annular guide rail, the driving motor 7 is fixedly arranged on the limiting slide block 9, the gear ring 13 is sleeved outside the furnace body 3, an output shaft of the driving motor 7 is connected with the gear 8, and the gear 8 is meshed with the gear ring 13; the driving motor 7 drives the gear 8 to rotate, the gear ring 13 acts on the gear 8 in a reverse direction, the gear 8 drives the driving motor 7 and the limiting slide block 9 to rotate around the furnace body 3 along the annular guide rail, and the limiting slide block 9 drives the supporting rod 5 to move along the guide groove 6.
Furthermore, the number of the ring-shaped guide rails is 2, the ring-shaped guide rails are respectively an upper guide rail 11 and a lower guide rail 12, the upper guide rail 11 and the lower guide rail 12 are sequentially arranged along the length direction of the furnace body 3, two ends of the limiting slide block 9 are respectively connected with the upper guide rail 11 and the lower guide rail 12, and the limiting slide block 9 rotates around the furnace body 3 along the upper guide rail 11 and the lower guide rail 12.
Further, the gear ring 13 is disposed on an outer wall of one of the annular rails.
Further, the furnace body 3 and the sleeve 4 are made of steel materials, but the furnace body 3 is not made of flexible materials
The inner cavity of the sleeve 4 is concave, and the inner cavity of the furnace body 3 is cylindrical.
The upper end of the furnace body 3 is provided with a feeding port 1 and a gas overflow port 2, and the lower end of the furnace body 3 is provided with a discharge port.
The device has no specific requirements on the feeding speed and the reaction temperature, and is suitable for the feeding speed and the reaction temperature of the traditional reaction furnace. The feeding speed, the reaction temperature and the wall temperature of each part are set by a user according to the actual condition of the user so as to prevent the simulation result from being separated from the actual condition.
The working process of the invention is as follows: the reactant is subjected to component detection before entering a pipeline in the furnace, data is fed back to a background database in the control system, the background database is compared with the components, and after the judgment, the adjusting device is controlled to drive the supporting rod 5 to move, so that the sleeve 4 is changed to a specified position. The components of the reactants in each batch are monitored, and the database can immediately control the sleeve 4 to move to a new position along with the data captured by the component detection device, so that a new optimal reaction environment is created in the inner chamber.
The working principle of the invention is as follows: detecting the components of the reactant, and sending the reactant to a database; the database is established by the early simulation result and is matched and judged with the actual detection data in real time; the supporting rod 5 is controlled to move to a specified position along the inclined guide rail through the position information corresponding to the database; the optimal reaction environment is constructed by changing the flow field and the temperature field distribution through the movement of the sleeve 4 position.
The thermal cracking reaction furnace for implementing the thermal cracking reaction method comprises a detection system, a data processing system, an operating system and a reaction system, and specifically comprises a chemical component detection device, a background database, a sleeve position adjusting mechanism and a furnace body 3 (comprising a feeding port 1, a discharging port, a built-in sleeve 4 and a gas overflow port 2 arranged on the furnace body 3).
In the invention, the reactant components in the feed inlet 1 are detected only by using a chemical component detection device and are transmitted to a background database for comparison, and other information does not need to be detected, such as: (ii) temperature; the invention adjusts the reaction environment, changes the flow field by changing the shape of the inner cavity of the reaction furnace, and can be used for other conditions, such as: temperature, without intervention.
The chemical component detection system does not need real-time detection, only needs to detect each batch of raw materials before entering the furnace, submits the component data to a background database for comparison and study, and then immediately updates the position of the adjusting sleeve 4 by the control mechanism, so as to ensure that a reaction environment with high conversion rate is kept in the furnace when the batch of raw materials enter the furnace. Adaptive reactant composition variation is achieved.
The moving direction of the sleeve position adjusting mechanism is the rotating upward direction, and the sleeve position adjusting mechanism has circumferential autorotation movement while adjusting the axial position, so that the sleeve 4 can be effectively prevented from being bonded to a clamping die by a solid viscous product.
The outer diameter of the sleeve 4 is slightly smaller than the inner diameter of the cylindrical section of the inner cavity of the furnace body 3, and a micro gap of 1-2 mm is kept; the furnace body 3 is formed by welding, and the sleeve 4 is firstly installed inside before welding; whether the supporting rod 5 can move smoothly along the guide rail is tested, and if the supporting rod is blocked, reasons can be found in time for correction; use driving motor 7 and drive mechanism to remove sleeve 4 bracing piece 5 and can change the axial position of sleeve 4, benefit from the slant of guide rail and arrange, sleeve 4 will carry out circumference rotation motion when axial motion, prevents that sleeve 4 from being glued to the card by the thick result of solid to die.
For the common mixture of polyethylene (PE for short in English, the main component of plastic film), polypropylene (PP for short in English, the main component of disposable mask and woven bag) and polystyrene (PS for short in English, the main component of disposable lunch box) in waste plastic garbage cracking oil refining industry, the optimal sleeve 4 position for achieving the optimal product conversion rate of the mixture is mostly in the position interval of 25% -50% from top to bottom with the cylindrical section of the furnace body 3.
The first embodiment of the invention is a computer simulation process and result of the optimal in-furnace shape when acetylene is used as a reactant for preparing hydrogen through thermal cracking; five groups of models of an inner cavity of a simulation furnace body 3 for acetylene thermal cracking are respectively a model No. 0, a model No. 1, a model No. 2, a model No. 3 and a model No. 4, as shown in FIG. 3, wherein the model No. 0 is a comparison group and the sleeve 4 is not installed; and in the rest models 1, 2, 3 and 4, the sleeve 4 moves 0, 80, 160 and 240mm from the starting point of the cylindrical section from the feeding port 1 to the discharging port.
The movable distance of the current model is 240mm, 4 sleeve 4 positions are provided, and a user can set more movable distances and more sleeve 4 positions according to requirements.
And (3) simulating the acetylene thermal cracking process by using CONVERGE simulation software, importing the simulation result into a chamber model in the reaction furnace, and setting parameters of each surface. Setting parameters of a reaction formula in a reaction mechanism file mech.dat, wherein the parameters comprise basic data such as material components, elements, the reaction formula, reaction activation energy and the like participating in a reaction and pre-factors; the physical parameters of the reactant and the product in the equation are summarized into a document named therm.dat according to a specified format, and the product can automatically search the physical parameters of the corresponding substances needed by the product in specific operation by the convert to carry out autonomous operation; starting operation after other necessary settings are carried out in software; then selecting a files of species, mass and out from the calculated database, taking time as an abscissa and mass of C2H2 as an ordinate, roughly observing and calculating the basic data such as yield, reaction rate and the like to achieve the aim of comparing the yields when feeding materials with different proportions, thereby selecting the optimal inner diameter shape when the yield is optimal. The following results are obtained from the summary calculation of the data, as shown in fig. 4, the conversion rates obtained in five different models of acetylene thermal cracking.
From the graph, it can be seen that for the thermal cracking of a certain material (acetylene in this simulation), there is a certain sleeve 4 position that optimizes conversion (position No. 2 in this simulation), which is referred to as the optimal sleeve 4 position. Different materials can have different optimal sleeve 4 positions, and when a plurality of components (such as polyethylene, polypropylene and engineering plastics) are mixed, the comprehensive optimal sleeve 4 position under a typical mixing proportion can be determined by simulation, so that a comparison relation is established with component detection data of the material inlet 1, and scientific basis is provided for adjusting the sleeve 4 position.
In the second embodiment of the present invention, a large number of simulation experiments with different proportions and different material mixtures are performed to calculate, fit, analyze and compare experimental data, and establish a database of common cleavable material components (such as polypropylene PP and polyethylene PE). Note that the user should determine the conditions of the simulation material, the blending ratio, the simulation temperature, etc. according to the actual needs of the user.
As shown in fig. 5, in which the abscissa is PP: the PE is blended in different proportions (the total parts of the reactants are assumed to be 10), the ordinate is the optimal sleeve 4 position under the proportion, and the position proportion of the sleeve 4 relative to the whole cylindrical section is expressed, wherein 10:00 represents that all the reactant components are polypropylene PP, and 00:10 represents that all the reactant components are polyethylene PE.
When the numerical ratio of the polypropylene PP to the polyethylene PE in the reactant components entering the furnace body 3 is not in the existing proportion, linear interpolation calculation is carried out by selecting the components falling into the corresponding interval, and the calculation process is as follows:
the numerical ratio of polypropylene PP to polyethylene PE is a: b, wherein a + b is 10;
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 10:00 (i.e. the reactant component is entirely polypropylene PP) and the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 07:03, X10 + Y7 ═ a, X0 + Y3 ═ b, the conversion is (27% × X + 30% ×);
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the ratio of polypropylene PP to polyethylene PE in the reactant component is 07:03 and the ratio of polypropylene PP to polyethylene PE in the reactant component is 05:05, X7 + Y5 ═ a, X3 + Y5 ═ b, the conversion is (30% × X + 35% ×);
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 05:05 and the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 03:07, X5 + Y3 ═ a, X5 + Y7 ═ b, the conversion is (35% X + 40% Y);
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 03:07 and the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 00:10 (i.e., the reactant components are all polyethylene PE), the conversion is (40% × X + 50% ×) when X × 3+ Y0 ═ a and X7 + Y10 ═ b;
when the chemical component detection device before feeding detects the PP of the batch of materials: the value of PE is close to 07:03, the database executes the corresponding instruction, and adjusts the position of the sleeve 4 to 30%. When the detection result of the fed materials is not in the existing proportion, such as 08: 02, a simple linear interpolation method is used to calculate 28.9% (i.e., X10 + Y7 is 8; X0 + Y3 is 2; and (iii) 27X + 30Y). The adjusting device drives the sleeve 4 to the designated position after receiving the database instruction. The optimal product conversion rate condition of the current materials is achieved in the reaction furnace;
material ratio pp: pe is 08: 02, he is 10:00 and 07:03, then X represents the ratio of reactant components 10: total amount at 00-27%; y represents the ratio of the reactant components of 07: the total amount at 03 is-30%. All of these ratios 10, 07, 08 are pp, so X10 + Y07, equals 08; 00, 03, 02 in the ratio are all pe, so X00 + Y03 equals 02; both 27% and 30% of the ratio are position values, so for 08: the position value of 02 is 27X + 30Y.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (10)
1. A thermal cracking reaction method of a self-adaptive reaction furnace with a variable inner chamber shape is characterized by comprising the following steps: according to the components of reactants entering the thermal cracking reaction furnace body, the inner cavity body of the thermal cracking reaction furnace is changed, and the thermal cracking reaction furnace adapts to the reaction environment of different reactant components.
2. A thermal cracking reaction process according to claim 1, wherein a sleeve is fitted inside the thermal cracking reactor, and the sleeve is movable up and down along the reactor;
according to the components of reactants entering the thermal cracking reaction furnace body, the inner cavity body of the thermal cracking reaction furnace is changed, and the specific process comprises the following steps: and detecting the components of the reactants entering the furnace body through a detection system, and moving the position of the adjusting sleeve in the furnace body according to the detected information of the components of the reactants.
3. A thermal cracking reaction process according to claim 1, wherein the sleeve is connected to a sleeve position adjusting mechanism, the sleeve position engaging mechanism is connected to a control system, the control system is connected to the detecting system,
according to the components of reactants entering the thermal cracking reaction furnace body, the inner cavity body of the thermal cracking reaction furnace is changed, and the specific process comprises the following steps: transmitting the information of the components of the reactant detected to enter the furnace body to a control system through a detection system; and the control system adjusts the position of the sleeve in the furnace body up and down through the sleeve position adjusting mechanism according to the reactant component information.
4. A thermal cracking reaction method according to claim 2 or 3, wherein the adjustment sleeve is moved to a position within the furnace body at a distance of 20% to 30% of the total length of the inner cavity of the furnace body from the top of the inner cavity of the furnace body when it is detected that the reactant component entering the furnace body is acetylene.
5. A thermal cracking reaction process according to claim 2 or 3, wherein when the reactant composition entering the furnace body is a mixture of blended polypropylene PP, polyethylene PE and polystyrene PS, the adjustment sleeve is moved to a position within the furnace body and at a distance of 25-50% of the total length of the inner cavity of the furnace body from the top of the inner cavity of the furnace body.
6. A thermal cracking reaction process according to claim 2 or 3, wherein when the reactant composition entering the furnace body is a mixture of blended polypropylene PP and polyethylene PE, the adjustment sleeve is moved to a position within the furnace body at a distance of 27-50% of the total length of the inner cavity of the furnace body from the top of the inner cavity of the furnace body.
7. A thermal cracking reaction process according to claim 7, wherein when the reactant components introduced into the furnace body are all polypropylene PP, the adjustment sleeve is moved to a position within the furnace body at a distance of 27% of the total length of the furnace body cavity from the top of the furnace body cavity;
when the numerical ratio of polypropylene PP to polyethylene PE in reactant components entering the furnace body is 07:03, the adjusting sleeve moves to a position in the furnace body and is 30% of the total length of the inner cavity of the furnace body away from the top of the inner cavity of the furnace body;
when the numerical ratio of polypropylene PP to polyethylene PE in reactant components entering the furnace body is 05:05, the adjusting sleeve is moved to be positioned in the furnace body and the distance from the top of the inner cavity of the furnace body is 35% of the total length of the inner cavity of the furnace body;
when the numerical ratio of polypropylene PP to polyethylene PE in reactant components entering the furnace body is 03:07, the adjusting sleeve moves to a position in the furnace body and is 40% of the total length of the inner cavity of the furnace body away from the top of the inner cavity of the furnace body;
when all the reactant components entering the furnace body are polyethylene PE, the adjusting sleeve moves to be positioned in the furnace body and is 50% of the total length of the inner cavity of the furnace body away from the top of the inner cavity of the furnace body.
8. A thermal cracking reaction method according to claim 7, wherein when the ratio of the values of PP and PE in the reactant components entering the furnace body is not the existing ratio, the values falling in the corresponding interval are selected for linear interpolation calculation, and the calculation process is as follows:
the numerical ratio of polypropylene PP to polyethylene PE is a: b, wherein a + b is 10;
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 10:00 (i.e. the reactant component is entirely polypropylene PP) and the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 07:03, X10 + Y7 ═ a, X0 + Y3 ═ b, the conversion is (27% × X + 30% ×);
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the ratio of polypropylene PP to polyethylene PE in the reactant component is 07:03 and the ratio of polypropylene PP to polyethylene PE in the reactant component is 05:05, X7 + Y5 ═ a, X3 + Y5 ═ b, the conversion is (30% × X + 35% ×);
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 05:05 and the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 03:07, X5 + Y3 ═ a, X5 + Y7 ═ b, the conversion is (35% X + 40% Y);
when the numerical ratio of polypropylene PP and polyethylene PE falls within the range: when the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 03:07 and the numerical ratio of polypropylene PP and polyethylene PE in the reactant component is 00:10 (i.e., the reactant components are all polyethylene PE), the conversion is (40% × X + 50% × Y) when X × 3+ Y0 ═ a and X × 7+ Y10 ═ b.
9. A thermal cracking reaction method according to claim 3, wherein the furnace body is spirally provided with a guide groove, and the outer wall of the sleeve is connected with a support rod which is disposed in the guide groove;
the sleeve position adjusting mechanism comprises a transmission mechanism and a driving motor, and the driving motor is connected with the supporting rod through the transmission mechanism and drives the supporting rod to move along the guide groove.
10. A thermal cracking reaction method according to claim 9, wherein the transmission mechanism includes a position-limiting slide block, an annular guide rail, a gear and a gear ring, the position-limiting slide block is provided with a position-limiting sliding groove arranged along the length direction of the furnace body, the annular guide rail is annularly sleeved outside the furnace body, the position-limiting slide block is arranged on the annular guide rail, the driving motor is fixedly arranged on the position-limiting slide block, the gear ring is sleeved outside the furnace body, an output shaft of the driving motor is connected with the gear, and the gear is engaged with the gear ring; the driving motor drives the gear to rotate, the gear ring acts on the gear in a reverse direction, the gear drives the driving motor and the limiting slide block to rotate around the furnace body along the annular guide rail, and the limiting slide block drives the supporting rod to move along the guide groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375632.6A CN113070000B (en) | 2021-04-08 | 2021-04-08 | Thermal cracking reaction method of self-adaptive reaction furnace with variable inner chamber shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375632.6A CN113070000B (en) | 2021-04-08 | 2021-04-08 | Thermal cracking reaction method of self-adaptive reaction furnace with variable inner chamber shape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113070000A true CN113070000A (en) | 2021-07-06 |
| CN113070000B CN113070000B (en) | 2022-08-05 |
Family
ID=76615427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110375632.6A Active CN113070000B (en) | 2021-04-08 | 2021-04-08 | Thermal cracking reaction method of self-adaptive reaction furnace with variable inner chamber shape |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113070000B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112910A (en) * | 1994-05-11 | 1995-12-06 | 普拉塞尔技术有限公司 | Enhanced oxidation of organic chemicals |
| CN101503796A (en) * | 2009-03-25 | 2009-08-12 | 中南大学 | Apparatus for preparing CVD diamond film for linear sample |
-
2021
- 2021-04-08 CN CN202110375632.6A patent/CN113070000B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112910A (en) * | 1994-05-11 | 1995-12-06 | 普拉塞尔技术有限公司 | Enhanced oxidation of organic chemicals |
| CN101503796A (en) * | 2009-03-25 | 2009-08-12 | 中南大学 | Apparatus for preparing CVD diamond film for linear sample |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113070000B (en) | 2022-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110090728B (en) | Method, device and equipment for controlling feeding amount in cement raw material vertical mill | |
| AU2017240574B2 (en) | Process, apparatus, controller and system for producing petroleum products | |
| US20120125758A1 (en) | Pyrolysis System | |
| CN1081683A (en) | The polymerization of alpha-olefin | |
| CN113070000B (en) | Thermal cracking reaction method of self-adaptive reaction furnace with variable inner chamber shape | |
| CA2750806C (en) | Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace | |
| CN1766130A (en) | Harmonization control method for blast furnace hot blast stove system | |
| JP5336530B2 (en) | Raw material firing apparatus and raw material firing method | |
| US11566191B2 (en) | System and process for continuous production of contaminate free, size specific biochar following gasification | |
| WO2008131209A1 (en) | Method for controlling syngas production in a system with multiple feed materials | |
| CN1099059C (en) | Method and apparatus for controlling polyolefine resin production plant | |
| EP1056784A1 (en) | Melt flow index determination in polymer process control | |
| EP3164440A1 (en) | Method to minimize the transition time from one polymer grade to another polymer grade in a polymerization plant | |
| CN102360179A (en) | Method for controlling in-out materials in process of producing acetylene by dry method | |
| WO2021061201A1 (en) | A system and process for continuous production of contaminate free, size specific biochar following gasification | |
| CN115451424B (en) | Coal feeding control method for coal-fired boiler based on pressure feedforward | |
| CN217418606U (en) | Self-adaptive thermal cracking reaction furnace with variable inner chamber shape | |
| JP2024094567A (en) | Mixing method of granular raw materials and manufacturing method of coke | |
| CN107057770B (en) | A kind of downstriker pyrolysis prepares the device and method of coal tar oil and gas with up flow type gasification coupling | |
| EP1276596B1 (en) | Enhancing production of resin within specifications | |
| CN1218924C (en) | Method for controlling density ofsizing agent in hydrorefining work section of equipment of fine terephthalic acid | |
| JP4751033B2 (en) | Raw material firing equipment | |
| CN210410371U (en) | Tungsten powder mixer with high automation degree | |
| JP2005060797A (en) | Method for charging material to blast furnace | |
| UA46308C2 (en) | Apparatus for a polymer waste processing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |