CN115505414A - Oil production system and method of small-particle oil shale - Google Patents
Oil production system and method of small-particle oil shale Download PDFInfo
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- CN115505414A CN115505414A CN202110631945.3A CN202110631945A CN115505414A CN 115505414 A CN115505414 A CN 115505414A CN 202110631945 A CN202110631945 A CN 202110631945A CN 115505414 A CN115505414 A CN 115505414A
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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
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/32—Other processes in ovens with mechanical conveying means
- C10B47/40—Other processes in ovens with mechanical conveying means with endless conveying devices
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/06—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of oil shale and/or or bituminous rocks
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- Oil, Petroleum & Natural Gas (AREA)
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- Wood Science & Technology (AREA)
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses an oil production system and method of small-particle oil shale, relating to the technical field of oil production of small-particle oil shale, comprising the following steps: the furnace body is internally provided with a closed furnace chamber; the microwave generator is arranged at the top of the closed furnace chamber; the conveying device comprises a mesh-shaped conveying belt which horizontally penetrates through the closed furnace chamber and is connected with the side walls at two ends of the furnace body through a dynamic sealing structure; the shale oil collecting device is arranged below the mesh-shaped conveyor belt; the feeding device is arranged at the top of the furnace body and is connected with the closed furnace chamber; the oil gas recovery device is arranged at the top of the furnace body and is connected with the closed furnace chamber; the system adopts a microwave heating mode to perform dry distillation on the oil shale, can be effectively applied to the small-particle oil shale with the particle size of less than 12mm, improves the utilization rate of the oil shale, improves the heating efficiency and the production efficiency, and solves the problems that the small-particle oil shale can not be pyrolyzed by a gas hot carrier method and the defect that the solid hot carrier method has low heating efficiency.
Description
Technical Field
The invention belongs to the technical field of oil production of small-particle oil shale, and particularly relates to an oil production system and method of small-particle oil shale.
Background
Oil shale (also called kerogen shale) is a high ash sedimentary rock containing combustible organic matter, and the main difference between the oil shale and coal is that the ash content is over 40 percent, and the main difference between the oil shale and carbonaceous shale is that the oil content is more than 3.5 percent. Oil shale belongs to unconventional oil and gas resources, is listed as a very important alternative energy source in the 21 st century by the feasibility of resource enrichment and development and utilization, and is a non-renewable fossil energy source like petroleum, natural gas and coal.
The existing oil shale ground dry distillation technology mainly comprises two methods, one is a gas heat load method, and the other is a solid heat load method. The gas heat load method provides a heat source by burning combustible gas, and provides additional heat for heating the oil shale to above 400 ℃ and needing to burn the oil shale; however, in order to enhance the porosity inside the heating furnace, a flow channel of hot carrier gas needs to be reserved, and the air-borne method generally treats oil shale with the particle size of 15-75 mm. The solid heat carrier method can process the oil shale with the grain diameter of less than 25mm, but the solid heat carrier method has the defects of large device, serious abrasion, short continuous operation time and low energy utilization rate. Dry distillation furnaces with different heating modes are designed at home and abroad, and the smoothing furnace can only dry distill the oil shale with the grain size of more than 12 mm; the grain size of the petROSIX dry distillation technology is 6.4-76 mm; the Tosco-II dry distillation technology can dry distill small-particle oil shale, but the oil sludge content of the produced finished oil is large.
Due to the above reasons, a large amount of small-particle oil shale resources cannot be effectively utilized, and the accumulated small-particle oil shale also causes surface environmental pollution. Therefore, a process method for effectively pyrolyzing small particle oil shale is urgently needed. The LR dry distillation technology is a multipurpose technology jointly developed by Lurgi and Ruhrgas companies in Germany, the particle size of the fed material is small (less than 6 mm), but more dust is brought into a recovery system, so that the oil sludge amount in the shale oil is larger. Therefore, the existing ground dry distillation oil shale technology has the defect that small-particle oil shale cannot be effectively utilized, and the resource is greatly wasted.
Disclosure of Invention
The invention aims to provide an oil production system and method of small-particle oil shale, aiming at the defects in the prior art, the system adopts a microwave heating mode to carry out dry distillation on the oil shale, can be effectively applied to the small-particle oil shale with the particle size of less than 12mm, improves the utilization rate of the oil shale, improves the heating efficiency and the production efficiency, and solves the problems that the small-particle oil shale cannot be pyrolyzed by a gas hot carrier method and the defect that the heating efficiency is low by a solid hot carrier method.
In order to achieve the above object, the present invention provides an oil production system of small particle oil shale, comprising:
the furnace body is internally provided with a closed furnace chamber;
the microwave generator is arranged at the top of the closed furnace chamber;
the conveying device comprises a mesh conveying belt, and the mesh conveying belt horizontally penetrates through the closed furnace chamber and is connected with the side walls at two ends of the furnace body through a dynamic sealing structure;
the shale oil collecting device is arranged below the mesh-shaped conveyor belt;
the feeding device is arranged at the top of the furnace body and is connected with the closed furnace chamber;
and the oil gas recovery device is arranged at the top of the furnace body and is connected with the closed furnace chamber.
Optionally, two microwave shields are arranged in the closed furnace cavity at intervals along the conveying direction of the conveying device, the microwave generator and the oil gas recovery device are arranged between the two microwave shields, and the feeding device is arranged on the outer sides of the two microwave shields.
Optionally, the microwave shields are plate-shaped, the upper ends of the two microwave shields are connected with the top wall of the furnace body, and a gap is arranged between the lower ends of the two microwave shields and the mesh conveyor belt.
Optionally, conveyor still includes drive roll and driven voller, the drive roll with the driven voller sets up respectively the both sides of furnace body, netted conveyer belt annular winding is in the drive roll with the driven voller outside, be in the drive roll with the driven voller upside netted conveyer belt can get into in the furnace body, be in the drive roll with the driven voller downside netted conveyer belt sets up the outside of furnace body, the drive roll can carry out stepless speed regulation, netted conveyer belt is 400 mesh metal mesh conveyer belt.
Optionally, a discharge bin is arranged on one side of the conveying device.
Optionally, an opening has been seted up on the both ends lateral wall of furnace body, move seal structure and set up in the opening, move seal structure includes metal seal baffle and sets up the high temperature resistant rubber seal pad of metal seal baffle lower extreme, high temperature resistant rubber seal pad inside is provided with inhalant canal and exhalant canal, inhalant canal with exhalant canal is connected with water circulative cooling device.
Optionally, the shale oil collecting device comprises an oil collecting bin arranged below the mesh conveyor belt, the oil collecting bin is in a box shape with an open top, and an oil outlet is formed in the bottom of the oil collecting bin.
Optionally, the oil gas recovery device comprises an oil gas outlet arranged on the top wall of the furnace body, and the oil gas outlet is connected to the oil-gas separator through a pipeline.
Optionally, the feeding device comprises:
the feeding bin is box-shaped, and the bottom of the feeding bin is communicated with a feeding hole in the top of the closed furnace chamber;
the upper baffle is movably arranged inside the feeding bin and can divide the feeding bin into an upper bin chamber and a lower bin chamber from top to bottom;
the lower baffle is movably arranged at the bottom of the feeding bin and can seal the feeding hole.
The invention also provides an oil production method of the small-particle oil shale, and an oil production system using the small-particle oil shale comprises the following steps:
providing a closed furnace chamber with a microwave generator;
inputting oil shale into the closed furnace cavity and heating the oil shale by using a microwave generator;
collecting the liquid oil generated after the oil shale is heated, collecting oil gas generated after the oil shale is heated, and carrying out oil-gas separation on the oil gas.
The invention provides an oil production system of small-particle oil shale, which has the beneficial effects that:
1. the system adopts a microwave heating mode to carry out dry distillation on the oil shale, can be effectively applied to the small-particle oil shale with the particle size of less than 12mm, improves the utilization rate of the oil shale, improves the heating efficiency and the production efficiency, and solves the problems that the small-particle oil shale can not be pyrolyzed by a gas hot carrier method and the defect that the solid hot carrier method has low heating efficiency;
2. the microwave heating mode adopted by the system has the advantages of uniform heating, high speed, selective heating, strong penetrating power, easiness in control and the like, the oil shale can be rapidly and uniformly heated, the stirring process of oil shale particles is omitted, open fire generated by other heating modes can be avoided, and the process safety is high;
3. the conveying device of the system can realize stepless speed regulation, and can control the residence time of oil shale particles in the microwave pyrolysis furnace according to the treatment requirement, so that the optimal pyrolysis efficiency of the oil shale particles with different particle sizes is controlled, the metal mesh conveying belt with 400 meshes can effectively isolate small-particle oil shale, and the efficient oil-coke separation can be ensured;
4. the feeding bin of the system is provided with an upper baffle and a lower baffle to form two-section feeding, the sealing of a sealed furnace chamber can be ensured during feeding, air is effectively isolated, and oxygen-isolated dry distillation of oil shale particles is realized.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 shows a schematic structural diagram of an oil production system of small-particle oil shale according to a first embodiment of the present invention.
Fig. 2 shows a schematic diagram of a dynamic seal structure of an oil production system of small-particle oil shale according to an embodiment of the invention.
Fig. 3 is a schematic diagram illustrating a time-temperature curve of microwave pyrolysis of oil shale in an oil production system of small particle oil shale according to an embodiment of the present invention.
Fig. 4 shows a flow chart of an oil production method of small particle oil shale according to a second embodiment of the invention.
Description of reference numerals:
1. a furnace body; 2. a microwave generator; 3. a mesh conveyor belt; 4. a dynamic sealing structure; 5. a feeding device; 6. an oil gas recovery device; 7. a microwave shield; 8. a gap; 9. a discharging bin; 10. a metal seal baffle; 11. a high temperature resistant rubber gasket; 12. a water inlet channel; 13. a water outlet channel; 14. a water circulation cooling device; 15. an oil collection bin; 16. an oil outlet; 17. an oil gas outlet; 18. an oil-gas separator; 19. a feeding bin; 20. an upper baffle plate; 21. and a lower baffle plate.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides an oil production system of small-particle oil shale, which comprises:
the furnace body is internally provided with a closed furnace chamber;
the microwave generator is arranged at the top of the closed furnace chamber;
the conveying device comprises a mesh-shaped conveying belt which horizontally penetrates through the closed furnace chamber and is connected with the side walls at two ends of the furnace body through a dynamic sealing structure;
the shale oil collecting device is arranged below the mesh-shaped conveyor belt;
the feeding device is arranged at the top of the furnace body and is connected with the closed furnace chamber;
and the oil gas recovery device is arranged at the top of the furnace body and is connected with the closed furnace chamber.
Specifically, can be with the input of oil shale granule to the furnace body in through feed arrangement, under conveyor's netted conveyer belt's conveying effect, carry the oil shale granule to microwave generator's below, heat the oil shale granule by microwave generator and make its pyrolysis, the oil shale granule after the heating produces liquid oil and oil gas, liquid oil flows down through the mesh of netted conveyer belt, can collect, oil gas gets into oil gas recovery device, separates by oil gas recovery device and retrieves.
Optionally, two microwave shields are arranged in the closed furnace cavity at intervals along the conveying direction of the conveying device, the microwave generator and the oil gas recovery device are arranged between the two microwave shields, and the feeding device is arranged on the outer sides of the two microwave shields.
Specifically, a heating section in the furnace body is formed between the two microwave shields, the microwave generators heat oil shale particles in the heating section, and the microwave shields are arranged to effectively insulate heat and avoid heat leakage.
Optionally, the microwave shields are plate-shaped, the upper ends of the two microwave shields are connected with the top wall of the oven body, and a gap is arranged between the lower ends of the two microwave shields and the mesh conveyor belt.
Specifically, the height of the gap is between 10 and 30mm, the height of the gap can be adjusted in real time according to the particle size of the shale oil particles, the gap enables the oil shale particles to have certain flatness after entering the heating section of the furnace body, uniform heating of the oil shale particles is guaranteed, and the large-particle-size oil shale which does not meet the dry distillation requirement can be isolated outside the heating section of the furnace body.
Optionally, the conveying device further comprises a driving roller and a driven roller, the driving roller and the driven roller are respectively arranged on two sides of the furnace body, the mesh conveyor belt is wound on the outer sides of the driving roller and the driven roller in an annular mode, the mesh conveyor belt on the upper sides of the driving roller and the driven roller can enter the furnace body, the mesh conveyor belt on the lower sides of the driving roller and the driven roller is arranged on the outer side of the furnace body, the driving roller can perform stepless speed regulation, and the mesh conveyor belt is a 400-mesh metal mesh conveyor belt.
Specifically, after oil shale particles enter the furnace body, the oil shale particles are conveyed into the heating section along with the metal mesh conveying belt of 400 meshes, the driving roller can perform stepless speed regulation, and the residence time of the oil shale particles in the microwave pyrolysis furnace can be controlled according to processing requirements, so that the optimal pyrolysis efficiency of the oil shale particles with different particle sizes is controlled, the metal mesh conveying belt of 400 meshes can effectively isolate small-particle oil shale, and efficient oil-coke separation can be ensured.
Optionally, a discharge bin is provided at one side of the conveying device.
Specifically, to above-mentioned annular netted conveyer belt, the discharge bin sets up in the belt below of conveyor one end, and the incomplete burnt of oil shale of output falls into the discharge bin in the one end nature whereabouts of netted conveyer belt and collects, and is very convenient.
Optionally, openings are formed in the side walls of the two ends of the furnace body, the movable sealing structure is arranged in the openings and comprises a metal sealing baffle plate and a high-temperature-resistant rubber sealing gasket arranged at the lower end of the metal sealing baffle plate, a water inlet channel and a water outlet channel are arranged inside the high-temperature-resistant rubber sealing gasket, and the water inlet channel and the water outlet channel are connected with the water circulation cooling device.
In the invention, the furnace body is subjected to oxygen isolation and sealing treatment from two aspects, firstly, air is prevented from entering the furnace body when feeding from the feeding bin; secondly, air is prevented from entering the furnace body when the air enters the furnace body from the mesh conveyor belt; and for the second point, a high-temperature-resistant rubber sealing gasket is adopted to seal the gap between the metal mesh belt and the metal sealing baffle plate to isolate oxygen, and water circulation is adopted to cool the periphery of the rubber sealing gasket to ensure that the sealing effect is not influenced by heat loss.
Optionally, the shale oil collecting device comprises an oil collecting bin arranged below the mesh conveyor belt, the oil collecting bin is in a box shape with an open top, and an oil outlet is arranged at the bottom of the oil collecting bin.
Specifically, the liquid oil naturally falls through the meshes of the mesh conveyor belt and falls into the oil collecting bin for collection.
Optionally, the oil gas recovery device comprises an oil gas outlet arranged on the top wall of the furnace body, and the oil gas outlet is connected to the oil-gas separator through a pipeline.
Specifically, oil gas enters an oil-gas separator through an oil-gas outlet, and is cooled in the oil-gas separator for oil-gas separation and collection.
Optionally, the feeding device comprises:
the feeding bin is box-shaped, and the bottom of the feeding bin is communicated with a feeding hole at the top of the closed furnace chamber;
the upper baffle is movably arranged inside the feeding bin and can divide the feeding bin into an upper bin chamber and a lower bin chamber from top to bottom;
the lower baffle is movably arranged at the bottom of the feeding bin and can seal the feeding hole.
In particular, the retort oil shale requires an oxygen-insulating environment, the invention carries out oxygen-insulating sealing treatment on the furnace body from two aspects, firstly, air is prevented from entering the furnace body when feeding is carried out from a feeding bin; secondly, air is prevented from entering the furnace body when the air enters the furnace body from the mesh conveyor belt; for the first point, the feeding bin is used for two-section feeding, during feeding, the upper baffle is closed firstly, so that oil shale particles enter the upper bin of the feeding bin, then the upper baffle is opened, so that the oil shale particles fall into the lower bin of the feeding bin, and then the lower baffle is opened, so that the oil shale particles enter the furnace body, and complete feeding is completed once, thus effectively blocking air from entering the furnace body, and ensuring oxygen-isolated dry distillation.
The invention also provides an oil production method of the small-particle oil shale, and an oil production system using the small-particle oil shale comprises the following steps:
providing a closed furnace chamber with a microwave generator;
inputting oil shale into the closed furnace cavity and heating the oil shale by using a microwave generator;
collecting liquid oil generated after the oil shale is heated, collecting oil gas generated after the oil shale is heated, and carrying out oil-gas separation on the oil gas.
Example one
As shown in fig. 1 and 3, the present invention provides an oil production system of small particle oil shale, comprising:
the furnace comprises a furnace body 1, wherein a closed furnace chamber is arranged in the furnace body 1;
the microwave generator 2 is arranged at the top of the closed furnace chamber;
the conveying device comprises a mesh-shaped conveying belt 3, and the mesh-shaped conveying belt 3 horizontally penetrates through the closed furnace chamber and is connected with the side walls at the two ends of the furnace body 1 through a dynamic sealing structure 4;
the shale oil collecting device is arranged below the mesh-shaped conveyor belt 3;
the feeding device 5 is arranged at the top of the furnace body 1, and the feeding device 5 is connected with the closed furnace chamber;
and the oil gas recovery device 6 is arranged at the top of the furnace body 1, and the oil gas recovery device 6 is connected with the closed furnace chamber.
In this embodiment, two microwave shields 7 are arranged in the closed oven cavity at intervals along the conveying direction of the conveying device, the microwave generator 2 and the oil gas recovery device 6 are arranged between the two microwave shields 7, and the feeding device 5 is arranged outside the two microwave shields 7.
In this embodiment, the microwave shields 7 are plate-shaped, the upper ends of the two microwave shields 7 are connected with the top wall of the furnace body 1, and a gap 8 is provided between the lower ends of the two microwave shields 7 and the mesh conveyor 3.
In this embodiment, the conveying device further comprises a driving roller and a driven roller, the driving roller and the driven roller are respectively arranged on two sides of the furnace body, the mesh conveyor belts 3 are annularly wound on the outer sides of the driving roller and the driven roller, the mesh conveyor belts 3 on the upper sides of the driving roller and the driven roller can enter the furnace body 1, the mesh conveyor belts 3 on the lower sides of the driving roller and the driven roller are arranged outside the furnace body 1, the driving roller can perform stepless speed regulation, and the mesh conveyor belts 3 are metal mesh conveyor belts of 400 meshes.
In this embodiment, a discharge bin 9 is provided at one side of the conveying device.
In this embodiment, openings are opened on the side walls of the two ends of the furnace body 1, the dynamic sealing structure 4 is arranged in the openings, the dynamic sealing structure includes a metal sealing baffle 10 and a high temperature resistant rubber sealing gasket 11 arranged at the lower end of the metal sealing baffle 10, a water inlet channel 12 and a water outlet channel 13 are arranged inside the high temperature resistant rubber sealing gasket 11, and the water inlet channel 12 and the water outlet channel 13 are connected with a water circulation cooling device 14.
In this embodiment, the shale oil collecting device comprises an oil collecting bin 15 arranged below the mesh conveyor belt 3, the oil collecting bin 15 is in the shape of a box with an open top, and an oil outlet 16 is arranged at the bottom of the oil collecting bin 15.
In the embodiment, the oil gas recovery device 6 comprises an oil gas outlet 17 which is arranged on the top wall of the furnace body 1, and the oil gas outlet 17 is connected to an oil gas separator 18 through a pipeline.
In the present embodiment, the feeding device 5 includes:
the feeding bin 19 is box-shaped, and the bottom of the feeding bin 19 is communicated with a feeding hole in the top of the closed furnace chamber;
the upper baffle plate 20 is movably arranged inside the feeding bin 19, and the feeding bin 19 can be divided into an upper bin chamber and a lower bin chamber by the upper baffle plate 20 from top to bottom;
the lower baffle 21 is movably arranged at the bottom of the feeding bin 19, and the feeding hole can be sealed by the lower baffle 21. In summary, when the oil production system of the small-particle oil shale provided by the invention is used, the specific steps are as follows:
(1) Feeding: the two-section feeding bin 19 is adopted for feeding, so that air can be effectively prevented from entering the furnace body, and continuous feeding can be ensured; during feeding, the upper baffle 20 is firstly closed to enable the oil shale particles to enter the upper chamber of the feeding bin 19, then the upper baffle 20 is opened to enable the oil shale particles to enter the lower chamber of the feeding bin 19, and then the lower baffle 21 is opened to enable the oil shale particles to enter the sealed furnace chamber of the furnace body, so that the functions of continuous feeding and oxygen isolation are achieved;
(2) Inputting: oil shale particles enter the heating furnace body 1 from the feeding bin 19 and are conveyed into the microwave heating section along with a metal mesh conveyor belt of 400 meshes, stepless speed regulation can be realized by a driving roller, a certain gap 8 is reserved between the lower end of a microwave shield and the metal mesh conveyor belt, the height of the gap 8 is between 10 and 30mm, the height of the gap 8 can be adjusted in real time according to the particle size of the shale oil particles, the gap enables the oil shale particles to have certain flatness after entering the heating section of the furnace body 1, uniform heating is ensured, and large-particle-size oil shale which does not meet the dry distillation requirement can be isolated outside the heating section of the furnace body 1;
(3) Oxygen isolation: in order to ensure that the whole furnace body 1 is in an oxygen-isolating dry distillation environment, metal sealing baffles 10 are respectively arranged at an inlet and an outlet of the furnace body 1, a high-temperature-resistant rubber sealing gasket 11 is adopted at the lower end of each metal sealing baffle 10 for dynamic sealing, air is isolated, and a water circulation cooling device is adopted for cooling the high-temperature-resistant rubber sealing gasket 11, so that the high-temperature-resistant rubber sealing gasket is ensured not to be damaged by heat;
(4) Heating: after the oil shale particles enter the microwave heating section, controlling the power of a microwave generator 2 and the transmission speed of a conveying device, and controlling the dry distillation temperature of the oil shale particles in a high-efficiency pyrolysis section at 500-600 ℃;
(5) And (3) outputting: when the oil shale particles are pyrolyzed, liquid shale oil enters the oil collecting bin 15 through the meshes of the mesh-shaped conveyor belt 3 and then flows out of the oil outlet 16 and is collected; the gaseous light oil-gas mixture enters an oil-gas separator 18 through an oil-gas outlet 17 to be cooled for oil-gas separation and collection;
(6) Coke unloading: residual oil shale coke after pyrolysis is conveyed to a discharge bin 9 through a mesh conveyor belt 3 to be collected.
Example two
As shown in fig. 4, the present invention further provides an oil production method of small particle oil shale, and an oil production system using the small particle oil shale, where the method includes:
providing a closed furnace chamber with a microwave generator;
inputting oil shale into the closed furnace cavity and heating the oil shale by using a microwave generator;
collecting liquid oil generated after the oil shale is heated, collecting oil gas generated after the oil shale is heated, and carrying out oil-gas separation on the oil gas.
Specifically, the method adopts a microwave heating mode to carry out dry distillation on the oil shale, can be effectively applied to the small-particle oil shale with the particle size of less than 12mm, improves the utilization rate of the oil shale, improves the heating efficiency and the production efficiency, and solves the problems that the gas hot-carrier method cannot pyrolyze the small-particle oil shale and the defect that the solid hot-carrier method has low heating efficiency; in addition, for the heated oil shale, collecting liquid oil generated after heating and oil gas generated after heating simultaneously, and carrying out oil-gas separation on the oil gas to obtain oil in the oil shale; the advantages of high heating efficiency and high oil gas production efficiency, and has extremely high economic and social benefits.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. An oil production system for small particle oil shale, the system comprising:
the furnace body is internally provided with a closed furnace chamber;
the microwave generator is arranged at the top of the closed furnace chamber;
the conveying device comprises a mesh conveying belt, and the mesh conveying belt horizontally penetrates through the closed furnace chamber and is connected with the side walls at two ends of the furnace body through a dynamic sealing structure;
the shale oil collecting device is arranged below the mesh-shaped conveyor belt;
the feeding device is arranged at the top of the furnace body and is connected with the closed furnace chamber;
and the oil gas recovery device is arranged at the top of the furnace body and is connected with the closed furnace chamber.
2. The oil production system of small-particle oil shale according to claim 1, wherein two microwave shields are arranged in the closed furnace chamber at intervals along the conveying direction of the conveying device, the microwave generator and the oil gas recovery device are arranged between the two microwave shields, and the feeding device is arranged outside the two microwave shields.
3. The oil production system of small-particle oil shale according to claim 2, wherein the microwave shields are plate-shaped, the upper ends of the two microwave shields are connected with the top wall of the furnace body, and a gap is arranged between the lower ends of the two microwave shields and the mesh conveyor belt.
4. The oil production system of small-particle oil shale according to claim 1, wherein the conveying device further comprises a driving roller and a driven roller, the driving roller and the driven roller are respectively arranged at two sides of the furnace body, the mesh-shaped conveyor belt is annularly wound at the outer sides of the driving roller and the driven roller, the mesh-shaped conveyor belt at the upper sides of the driving roller and the driven roller can enter the furnace body, the mesh-shaped conveyor belt at the lower sides of the driving roller and the driven roller is arranged at the outer part of the furnace body, the driving roller can perform stepless speed regulation, and the mesh-shaped conveyor belt is a 400-mesh metal mesh conveyor belt.
5. The oil production system of small particle oil shale according to claim 4, wherein a discharge bin is arranged on one side of the conveying device.
6. The oil production system of small-particle oil shale according to claim 1, wherein openings are formed in side walls of two ends of the furnace body, the dynamic sealing structure is arranged in the openings, the dynamic sealing structure comprises a metal sealing baffle plate and a high-temperature-resistant rubber sealing gasket arranged at the lower end of the metal sealing baffle plate, a water inlet channel and a water outlet channel are arranged inside the high-temperature-resistant rubber sealing gasket, and the water inlet channel and the water outlet channel are connected with a water circulation cooling device.
7. The oil production system of small particle oil shale according to claim 1, wherein the shale oil collection apparatus comprises an oil collection bin disposed below the mesh conveyor belt, the oil collection bin is in the shape of a box with an open top, and an oil outlet is disposed at the bottom of the oil collection bin.
8. The oil production system of small-particle oil shale according to claim 1, wherein the oil gas recovery device comprises an oil gas outlet arranged on the top wall of the furnace body, and the oil gas outlet is connected to the oil gas separator through a pipeline.
9. The small particle oil shale oil production system of claim 1, wherein the feed device comprises:
the feeding bin is box-shaped, and the bottom of the feeding bin is communicated with a feeding hole in the top of the closed furnace chamber;
the upper baffle is movably arranged inside the feeding bin and can divide the feeding bin into an upper bin chamber and a lower bin chamber from top to bottom;
the lower baffle is movably arranged at the bottom of the feeding bin and can seal the feeding hole.
10. A method for producing oil from small particle oil shale, the method comprising the steps of:
providing a closed furnace chamber with a microwave generator;
inputting oil shale into the closed furnace cavity and heating the oil shale by using a microwave generator;
collecting the liquid oil generated after the oil shale is heated, collecting oil gas generated after the oil shale is heated, and carrying out oil-gas separation on the oil gas.
Priority Applications (1)
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| CN201027197Y (en) * | 2007-02-15 | 2008-02-27 | 东北电力大学 | Microwave roller pyrogenic distillation device |
| CN205436574U (en) * | 2015-12-28 | 2016-08-10 | 北京中石大能源技术服务有限公司 | Oil industrial waste's innocent treatment device |
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