CN218710177U - Oil shale vacuum electric heating continuous dry distillation system - Google Patents
Oil shale vacuum electric heating continuous dry distillation system Download PDFInfo
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Abstract
The utility model discloses an oil shale vacuum electric heating continuous dry distillation system, which comprises a crusher, an oil storage tank, a screening machine, a pelletizer, a dryer, an electric heating vacuum rotary kiln, a tubular condenser and a control component; the output end of the pulverizer is connected with the sieving machine; the output end of the screening machine is respectively connected with the pelletizer and the dryer; the output end of the pelletizer is also connected with the dryer; the output end of the dryer is connected with the electric heating vacuum rotary kiln; the gas phase output end of the electric heating vacuum rotary kiln is connected with the tubular condenser, the liquid phase output end of the tubular condenser is connected with the oil storage tank, and the screening machine, the pelletizer, the drying machine, the electric heating vacuum rotary kiln and the tubular condenser are respectively and electrically connected with the control assembly.
Description
Technical Field
The utility model belongs to the technical field of unconventional petrochemical production, concretely relates to oil shale vacuum electrical heating dry distillation system in succession.
Background
China is a large petroleum consumption country, with continuous exploration on petroleum resources and maturation and development of related technologies, the domestic petroleum yield is steadily increased, but the domestic petroleum yield still cannot catch up with the increase speed of petroleum consumption in domestic markets, and the domestic petroleum yield is very dependent on import.
The imported mode can not improve the energy structure of rich coal, poor oil and less gas in China, meanwhile, the price of oil in the international market is continuously increased, the quality of the supplied oil is increasingly poor, and in order to reduce the dependency on oil import and improve the energy structure in China, the comprehensive utilization of the oil shale which is an unconventional oil and gas resource cannot be ignored.
The oil content of the oil shale is more than 3.5 percent, china finds that the oil shale resource reserves are about 7199 hundred million t, and the recoverable reserves of the prior art are about 30 hundred million t in terms of the shale oil 476 hundred million t.
The industrial utilization of oil shale in China has been over 90 years old, wherein the smoothing furnace is widely applied at home, the total amount exceeds 500, the technology is relatively mature, but the smoothing furnace still has the limitations under the requirements of the current market and the environmental protection policy of metallurgy smelting: 1) Powder produced by the working procedures of mining, transporting, crushing and the like cannot be treated; 2) The single furnace has low treatment capacity under the influence of the furnace type structure; 3) The oil yield is not high; 4) A large amount of air is blown in during the production process, so that the calorific value of the generated gas is not high; 5) The smelting process has large pollution. Under the influence of the improvement of environmental requirements, most oil shale enterprises stop production nowadays, and the market is urgent to develop a continuous, clean and efficient oil shale oil extraction and dry distillation system.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art not enough, a continuous dry distillation system of oil shale vacuum electrical heating is provided, research and development brand-new oil shale is carried oil and result comprehensive utilization technology and corollary equipment, the system is smelted to the current oil shale of innovation, the powder of solving current technology existence can't be utilized, the single-furnace handling capacity is low, the oil yield is not high, the flue gas calorific value is not high, smelt the serious problem of process pollution, realize the technological target of electrical heating vacuum dry distillation "in succession, it is clean, high efficiency", accelerate the utilization of internal unconventional oil gas resource, improve internal energy structure.
In order to solve the technical problem, the technical scheme of the utility model is that: a vacuum electric heating continuous dry distillation system for oil shale comprises a pulverizer, an oil storage tank, a screening machine, a pelletizer, a dryer, an electric heating vacuum rotary kiln, a tubular condenser and a control assembly, wherein the pulverizer is used for pulverizing the oil shale; the output end of the pulverizer is connected with the sieving machine; the output end of the screening machine is respectively connected with the pelletizer and the dryer; the output end of the pelletizer is also connected with the dryer; the output end of the dryer is connected with the electric heating vacuum rotary kiln; the gas phase output end of the electric heating vacuum rotary kiln is connected with the tubular condenser, the liquid phase output end of the tubular condenser is connected with the oil storage tank, and the screening machine, the pelletizer, the drying machine, the electric heating vacuum rotary kiln and the tubular condenser are respectively and electrically connected with the control assembly.
Preferably, the sieving range of the sieving machine is d <6mm and 6mm or < -d or 30mm.
Preferably, a first closed type belt conveyor is arranged between the pulverizer and the screening machine, a second closed type belt conveyor is arranged between the screening machine and the pelletizer, and the first closed type belt conveyor and the second closed type belt conveyor are respectively and electrically connected with the control assembly.
Preferably, a first large-inclination-angle belt conveyor or a bucket elevator is respectively arranged between the sieving machine, the pelletizer and the drying machine; and a drying storage bin is arranged between the first large-inclination-angle belt conveyor or the bucket elevator and the drying machine, the drying storage bin is arranged at the top of the drying machine, and the first large-inclination-angle belt conveyor is electrically connected with the control assembly.
Preferably, be equipped with transition storage silo and vacuum carbonization storage silo between desiccator output and the electrical heating vacuum rotary kiln, the transition storage silo sets up in the desiccator bottom, and the desiccator passes through material union coupling with the transition storage silo, and the transition storage silo passes through the big inclination belt feeder of second with the vacuum carbonization storage silo and is connected, and the vacuum carbonization storage silo sets up in electrical heating vacuum rotary kiln top, and the big inclination belt feeder of second is connected with the control assembly electricity.
Preferably, the electric heating vacuum rotary kiln consists of an electric heating module, a kiln body and a discharging device, wherein the electric heating module is arranged in the kiln body, the kiln body is respectively connected with the discharging device, the gas phase output end of the kiln body is connected with the tubular condenser, and the electric heating module and the discharging device are respectively and electrically connected with the control assembly; the electric heating modules adopt resistance wires and resistance belts as heating elements, the electric heating modules are 9 groups, the 9 groups of electric heating modules are respectively arranged along the kiln tail to the kiln head of the furnace body, so that the furnace body forms 9 temperature zones, and the temperature of each temperature zone from the kiln tail to the kiln head is 500 ℃, 510 ℃, 520 ℃, 530 ℃, 540 ℃, 530 ℃, 520 ℃, 510 ℃ and 500 ℃ in sequence; the pressure P in the furnace body is less than 5kPa.
Preferably, a heat-preservation air suction pipeline is arranged between the gas phase output end of the electric heating vacuum rotary kiln and the tubular condenser, a trolley track is arranged between the discharging device and the combustion chamber of the electric heating vacuum rotary kiln, a transfer trolley is mounted on the trolley track, the gas phase output end of the combustion chamber is connected with the dryer through a heat-preservation flue gas pipeline, and the combustion chamber is electrically connected with the control assembly.
Preferably, the gas phase output end of the tubular condenser is sequentially connected with a vacuum unit, a dust removal and purification device and a tail gas emission device, and the vacuum unit, the dust removal and purification device and the tail gas emission device are respectively and electrically connected with the control assembly; the gas phase output end of the tubular condenser is connected with the vacuum unit through a first flue gas pipeline, the vacuum unit is connected with the dust removal and purification equipment through a second flue gas pipeline, and the dust removal and purification equipment is connected with the tail gas emission equipment through a third flue gas pipeline.
Preferably, the gas phase output end of the dryer is connected with the dust removal and purification equipment through a fourth flue gas pipeline.
Compared with the prior art, the utility model has the advantages of:
(1) The utility model discloses an oil shale vacuum electrical heating continuous dry distillation system, oil shale can form more powder of & lt 6mm particle diameter in exploitation, transportation and crushing process, this system carries out the branch sieve with the oil shale powder after the breakage earlier, the branch sieve is & lt 6mm particle diameter and 6 to 30mm particle diameter, concentrate the powder of & lt 6mm particle diameter and collect the back and become 6 to 30mm ball material through the pelletizer, then dry, with the direct drying of the powder of particle diameter between 6 to 30mm, improved the utilization ratio to the oil shale raw materials, the utilization ratio reaches more than 95%;
(2) Because under the stable production prerequisite, the grain diameter of the charging material is smaller, and the dry distillation efficiency is higher, the utility model discloses the system control goes into the charging material grain diameter between 6 to 30mm, has improved dry distillation efficiency, has also guaranteed the homogeneity of going into the charging material to guaranteed the stability of continuous production technology, the finer grain diameter of the charging material of going into simultaneously and vacuum electrical heating means, guaranteed that shale semicoke tailings oil content is less than or equal to 0.5%;
(3) The system of the utility model adopts the electric heating vacuum rotary kiln as the dry distillation equipment, uses the electric heating as the heating means, and because of the characteristics of the rotary kiln smelting and the electric heating, the charging materials are concentrated on the lower part of the furnace body and move forward at uniform speed, thereby realizing the continuous production, and the gas without certain impact force impacts the charging material particles, thereby preventing more fine particles from entering the smoke gas to pollute the shale oil product;
(4) The electric heating vacuum rotary kiln of the utility model adopts the vacuum unit, maintains the pressure in the kiln to be less than or equal to 5kPa, on one hand, improves the speed of oil shale decomposing to generate oil gas in the dry distillation process; on the other hand, the retention time of the oil gas in the high-temperature dry distillation equipment is also ensured to be short, and the oil gas is prevented from being further decomposed;
(5) The utility model adopts resistance heating as the heat source of the electric heating vacuum rotary kiln, on one hand, the accurate temperature control of a multi-temperature area can be realized, the temperature control accuracy is less than or equal to +/-2 ℃, and the reduction of the oil shale decomposition efficiency or the excessive decomposition of oil gas caused by local overtemperature in the equipment can be avoided; on the other hand, no extra waste gas is generated by electric heating, and the smelting process is clean;
(6) The utility model discloses the shale semicoke that the dry distillation produced gets into the combustion chamber, fully burns the carbon in the semicoke with remaining oil, and organic matter, S element etc. that high temperature burning contained in the shale semicoke simultaneously removes, and the purer shale ash of output and flue gas, the high temperature flue gas after the purification return the desiccator as the heat source, carries out tailings and waste heat utilization, and the shale ash after the purification is according to market, and the direct production has valuable product.
Drawings
FIG. 1 is a schematic diagram of the apparatus connection of the oil shale vacuum electric heating continuous dry distillation system of the present invention;
FIG. 2 is a process flow diagram of the oil shale vacuum electric heating continuous dry distillation system of the present invention.
Description of reference numerals:
1. the device comprises a pulverizer, 2, a first closed belt conveyor, 3, a screening machine, 4, a second closed belt conveyor, 5, a pelletizer, 6, a first large-inclination-angle belt conveyor, 7, a drying storage bin, 8, a dryer, 9, a material pipe, 10, a transition storage bin, 11, a second large-inclination-angle belt conveyor, 12, a vacuum distillation storage bin, 13, an electric heating vacuum rotary kiln, 14, a heat-preservation air extraction pipeline, 15, a tubular condenser, 16, an oil guide pipeline, 17, an oil storage tank, 18, a first flue gas pipeline, 19, a vacuum unit, 20, a second flue gas pipeline, 21, a dust removal purification device, 22, a third flue gas pipeline, 23, a tail gas discharge device, 24, a transfer trolley, 25, a trolley track, 26, a combustion chamber, 27, a heat-preservation flue gas pipeline, 28 and a fourth flue gas pipeline.
Detailed Description
The following description of the embodiments of the present invention is provided in connection with the following embodiments:
it should be noted that the structure, proportion, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used to limit the limit conditions that the present invention can be implemented, and any modification of the structure, change of the proportion relation or adjustment of the size should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function and the achievable purpose of the present invention.
Example 1
As shown in fig. 1, the utility model discloses an oil shale vacuum electric heating continuous dry distillation system, which comprises a pulverizer 1 and an oil storage tank 17, and further comprises a screening machine 3, a pelletizer 5, a drying machine 8, an electric heating vacuum rotary kiln 13, a tubular condenser 15 and a control component; the output end of the pulverizer 1 is connected with a sieving machine 3; the output end of the screening machine 3 is respectively connected with a pelletizer 5 and a dryer 8; the output end of the pelletizer 5 is also connected with the dryer 8; the output end of the dryer 8 is connected with an electric heating vacuum rotary kiln 13; the gas phase output end of the electric heating vacuum rotary kiln 13 is connected with the tubular condenser 15, the liquid phase output end of the tubular condenser 15 is connected with the oil storage tank 17, and the screening machine 3, the pelletizer 5, the drying machine 8, the electric heating vacuum rotary kiln 13 and the tubular condenser 15 are respectively and electrically connected with the control assembly.
The crusher 1 is used for crushing oil shale, and a conventional crusher on the market can meet the requirements, and the type and the specification of the crusher are determined according to the actual capacity. The oil storage tank 17 is a stainless steel oil storage tank and is used for storing condensed liquid-phase oil.
Example 2
As shown in fig. 1, the sieving range of the sieving machine 3 is preferably d <6mm and 6 mm-d-straw 30mm.
The conventional screening machine in the market can meet the requirements, the screening range is less than 6mm and 6 to 30mm, and the type and specification of the screening machine are determined according to the actual productivity.
As shown in fig. 1, preferably, a first closed belt conveyor 2 is arranged between the pulverizer 1 and the screening machine 3, a second closed belt conveyor 4 is arranged between the screening machine 3 and the pelletizer 5, and the first closed belt conveyor 2 and the second closed belt conveyor 4 are respectively electrically connected with the control assembly.
A first large-inclination-angle belt conveyor 6 or a bucket elevator is respectively arranged between the sieving machine 3, the pelletizer 5 and the drying machine 8; and a drying storage bin 7 is arranged between the first large-inclination-angle belt conveyor 6 or the bucket elevator and the dryer 8, the drying storage bin 7 is arranged at the top of the dryer 8, and the first large-inclination-angle belt conveyor 6 is electrically connected with the control assembly.
A gate valve is arranged between the drying storage bin 7 and the dryer 8.
The conventional pelletizer in the market can meet the requirements, the diameter of the pelletizing material is 6-30mm, and the model and specification are determined according to the actual productivity.
Example 3
As shown in fig. 1, preferably, an excess storage bin 10 and a vacuum dry distillation storage bin 12 are arranged between the output end of the dryer 8 and the electric heating vacuum rotary kiln 13, the excess storage bin 10 is arranged at the bottom of the dryer 8, the dryer 8 is connected with the excess storage bin 10 through a material pipe 9, the excess storage bin 10 is connected with the vacuum dry distillation storage bin 12 through a second large-inclination-angle belt conveyor 11, the vacuum dry distillation storage bin 12 is arranged at the top of the electric heating vacuum rotary kiln 13, and the second large-inclination-angle belt conveyor 11 is electrically connected with the control assembly.
A gate valve is arranged between the dryer 8 and the transition storage bin 9, and a gate valve is arranged between the vacuum dry distillation storage bin 12 and the electric heating vacuum rotary kiln 13.
The utility model discloses use shale semicoke fully to burn and produce high temperature flue gas as dry heat source, equipment entry temperature is not less than 100 ℃, drying temperature is not higher than 180 ℃, exit temperature is not less than 100 ℃, the income stove material moisture content is less than or equal to 1% after the drying, it stores to go into the furnace charge to transition storage silo 10 about 100 ℃.
And when the temperature of the charging materials in the transition storage bin 10 is below 60 ℃, starting charging, when the productivity is low, using a bell-type charging hopper and a bucket elevator to charge, and when the productivity is high, using a large-inclination-angle belt conveyor to charge to the electric heating vacuum rotary kiln 13.
The electric heating vacuum rotary kiln 13 consists of an electric heating module, a kiln body and a discharging device, wherein the electric heating module is arranged in the kiln body, the kiln body is connected with the discharging device, the gas phase output end of the kiln body is connected with the tubular condenser 15, and the electric heating module and the discharging device are respectively and electrically connected with the control assembly; the electric heating modules adopt resistance wires and resistance belts as heating elements, the electric heating modules are 9 groups, the 9 groups of electric heating modules are respectively arranged along the kiln tail to the kiln head of the furnace body, so that the furnace body forms 9 temperature zones, and the temperature of each temperature zone from the kiln tail to the kiln head is 500 ℃, 510 ℃, 520 ℃, 530 ℃, 540 ℃, 530 ℃, 520 ℃, 510 ℃ and 500 ℃ in sequence; the pressure P in the furnace body is less than 5kPa.
The electric heating vacuum rotary kiln 13 is composed of an electric heating module, a kiln body and a discharging device. The heat-preservation air extraction pipeline 14 extends to the high-temperature area of the rotary kiln hearth, and heat-preservation materials are arranged on the periphery of the heat-preservation air extraction pipeline 14 to prevent condensable oil gas from condensing in the air extraction pipeline; the electric heating module adopts a resistance wire and a resistance band as heating elements, 9 temperature zones are designed in the furnace body, the temperature of each temperature zone from the tail of the kiln to the head of the kiln is 500 ℃, 510 ℃, 520 ℃, 530 ℃, 540 ℃, 530 ℃, 520 ℃, 510 ℃ and 500 ℃, the temperature of the electric heating module is automatically controlled by a control component, the temperature control precision is less than or equal to +/-2 ℃, a vacuum unit ensures that the pressure in the furnace is less than or equal to 5kPa, the charging material automatically enters the rotary kiln and passes through each temperature zone of the hearth at a certain speed, the retention time is 1 to 1.5 hours, the vacuum dry distillation process of the material is completed, and the charging material is conveyed to a transfer trolley 24 through a discharge port by a discharge device.
Example 4
As shown in fig. 1, preferably, a heat-insulating exhaust gas pipeline 14 is arranged between the gas-phase output end of the electric heating vacuum rotary kiln 13 and the tubular condenser 15, a trolley track 25 is arranged between the discharge device of the electric heating vacuum rotary kiln 13 and the combustion chamber 26, the trolley track 25 is provided with a transfer trolley 24, and the gas-phase output end of the combustion chamber 26 is connected with the dryer 8 through a heat-insulating flue gas pipeline 27.
The exhaust gas emission temperature is less than or equal to 40 ℃, the exhaust gas enters the dust removal purification equipment 21, the stainless steel oil storage tank 17 is connected below the tubular condenser 15, and the oil storage tank 17 comprises a liquid level meter and a manual oil drain valve.
The high-temperature shale semicoke loaded by the transfer trolley 24 is directly thrown into the combustion chamber 26 for full combustion, the generated shale ash is collected after combustion, the high-temperature flue gas generated in the combustion process is directly sent to the dryer 8 through the air duct, after the utilization of waste heat is completed, the tail gas enters the dust removal and purification equipment 21, and the periphery of a flue gas pipeline 28 from the combustion chamber 26 to the section of the dryer 8 is provided with a heat insulation material.
Shale ash generated after shale semicoke is fully combusted is used for producing cement, floor tiles, concrete, microcrystalline glass, ceramsite or other industrial raw and auxiliary materials according to market demands of places of projects.
As shown in fig. 1, preferably, the gas phase output end of the tubular condenser 15 is sequentially connected with a vacuum unit 19, a dust removal and purification device 21 and an exhaust emission device 23, and the vacuum unit 19, the dust removal and purification device 21 and the exhaust emission device 23 are respectively and electrically connected with the control component; the gas phase output end of the tubular condenser 15 is connected with a vacuum unit 19 through a first flue gas pipeline 18, the vacuum unit 19 is connected with a dust removal purification device 21 through a second flue gas pipeline 20, and the dust removal purification device 21 is connected with a tail gas emission device 23 through a third flue gas pipeline 22.
The dust removal and purification equipment 21 adopts a cloth bag for dust removal, is provided with a smoke component abnormity alarm instrument, and directly empties the purified smoke reaching the standard.
As shown in fig. 1, preferably, the gas phase output end of the dryer 8 is connected with the dust-removing and purifying device 21 through a fourth flue gas pipeline 28.
As shown in fig. 1, the liquid phase output of the tube condenser 15 is preferably connected to an oil storage tank 17 via an oil guide line 16.
Example 5
As shown in fig. 1 and 2, the system operation process of the present invention comprises the following steps:
1. crushing and screening raw oil shale ore, directly feeding oil shale particles with the particle size of 6-30mm into a drying storage bin 7, and feeding oil shale powder with the particle size not being more than 6mm into the drying storage bin 7 after pelletizing;
2. after being dried, the oil shale particles enter a vacuum dry distillation storage bin 12 through a feeding and charging system;
3. the oil shale particles are put into a furnace from the vacuum dry distillation storage bin 12 for vacuum dry distillation;
4. oil gas is condensed and collected by oil-containing flue gas generated in the dry distillation process through a condensing system, oil enters an oil storage tank 17, and the flue gas is treated by dust removal and purification equipment 21 and then is evacuated;
5. shale semicoke generated after the dry distillation enters a transfer trolley through a discharging device, the shale semicoke enters a semicoke combustion chamber 26 through the transfer trolley, high-temperature flue gas generated after the shale semicoke is fully combusted returns to the dryer 8 to be used as a main heat source of the dryer 8, and the shale semicoke enters a dust removal purification device 21 for treatment and evacuation after the shale semicoke is dried;
6. shale ash generated after the shale semicoke is fully combusted finally determines the processing direction according to a local market gap, and resources are recycled.
The working principle of the utility model is as follows:
the utility model discloses an oil shale electric heating continuous vacuum dry distillation system for realizing the smelting process target of 'continuous, clean and high-efficiency', which designs the procedures of crushing, screening and pelletizing, the grain diameter of charging materials is between 6 and 30mm, and the utilization rate of raw materials reaches more than 95%; an electrically heated vacuum rotary kiln is used as dry distillation equipment, 9 temperature zones are arranged in total, the pressure in the rotary kiln is less than or equal to 5kPa during dry distillation, and the retention time of a charge entering the rotary kiln is 1 to 1.5 hours; oil-containing flue gas generated by dry distillation enters a condenser from an air extraction opening, shale oil formed after oil gas condensation enters an oil storage tank, tail gas at the temperature of less than or equal to 40 ℃ enters dust removal and purification equipment, and is purified and then is emptied; the shale semicoke formed by dry distillation is thrown into a combustion chamber through a transfer trolley for full combustion, and the smoke and shale ash generated by combustion are purified by high-temperature combustion; the purified high-temperature flue gas returns to the dryer for waste heat utilization, and the utilized tail gas enters and exits the dust removal purification equipment to be purified and then is exhausted; the purified shale ash is collected in a centralized way and reused according to market conditions.
As shown in fig. 1 to 2, the utility model discloses an oil shale vacuum electrical heating continuous dry distillation system, oil shale ore enters a crusher 1 for crushing, oil shale raw material enters a screening machine 3 through a first closed belt conveyor 2 after the crushing is completed, the crushed oil shale particles enter a pelletizer 5 through a second closed belt conveyor 4 which does not meet the particle size requirement for pelletizing, the pelletized oil shale particles enter a drying storage bin 7 through a first large-inclination belt conveyor 6 or a bell-type feeding hopper or a bucket elevator after the pelletizing is completed, the furnace charge enters a dryer 8 from the drying storage bin 7 through a material pipe, the furnace charge enters a transition storage bin 10 from the material pipe 9 of the dryer 8 after the drying is completed, the furnace charge enters a transition storage bin 10 from the transition storage bin 10 through a material pipe 9, the furnace charge enters a vacuum dry distillation storage bin 12 through a second large-inclination belt conveyor 11, the furnace charge enters a vacuum heating vacuum rotary kiln 13 through the material pipe from the vacuum dry distillation storage bin 12 through a material pipe to start smelting, oil gas generated in the dry distillation process enters a heat preservation storage bin 14 through a heat preservation flue gas combustion flue gas exhaust pipeline 14, enters a tubular condenser 15, the oil gas condensation pipe, the oil forms liquid phase oil, the oil combustion flue gas enters a heat preservation combustion flue gas exhaust pipeline, the heat preservation combustion flue gas purification and purification unit 18, the heat preservation flue gas purification and purification unit, the heat recovery unit 21 passes through a heat recovery unit 21, the heat recovery unit 21, after being purified, the waste gas is discharged from a tail gas discharge device 23 through a third flue gas pipeline 22.
The utility model discloses an oil shale vacuum electrical heating continuous dry distillation system, oil shale is mining, can form more the powder of <6mm particle diameter in transportation and the broken process, oil shale powder after this system will be broken divides the sieve earlier, divide the sieve to be <6mm particle diameter and 6 to 30mm particle diameter, concentrate the powder of <6mm particle diameter and collect the back and become 6 to 30mm ball material through the pelletizer, then dry, with the direct drying of the powder of particle diameter between 6 to 30mm, the utilization ratio to the oil shale raw materials has been improved, the utilization ratio reaches more than 95%.
Because under the stable production prerequisite, the income furnace charge particle diameter is less, and dry distillation efficiency is higher, the utility model discloses the system control goes into the furnace charge particle diameter between 6 to 30mm, has improved dry distillation efficiency, has also guaranteed the homogeneity of going into the furnace charge to guaranteed the stability of continuous production technology, the more thin income furnace charge particle diameter and vacuum electrical heating means simultaneously guarantee that shale semicoke tailings oil content is less than or equal to 0.5%.
The utility model discloses the system adopts electrical heating vacuum rotary kiln as the dry distillation equipment to electrical heating is the heating means, because of the rotary kiln smelt with the electrical heating characteristics, goes into the stove material and concentrates on the equal fast marching in furnace body lower part, has realized continuous, clean, high-efficient smelting process target, and the gas impact who does not have certain impact force goes into the stove material granule, thereby can not cause pollution shale oil product in more tiny granule gets into the flue gas.
The electric heating vacuum rotary kiln maintains the pressure in the kiln to be less than or equal to 5kPa, on one hand, the speed of oil shale decomposition to generate oil gas in the dry distillation process is improved; on the other hand, the retention time of the oil gas in the high-temperature carbonization equipment is also ensured to be short, and the oil gas is prevented from being further decomposed.
The utility model adopts resistance heating as the heat source of the electric heating vacuum rotary kiln, on one hand, the accurate temperature control of a multi-temperature area can be realized, the temperature control accuracy is less than or equal to +/-2 ℃, and the reduction of the oil shale decomposition efficiency or the excessive decomposition of oil gas caused by local overtemperature in the equipment can be avoided; on the other hand, the electric heating does not generate additional waste gas, and the smelting process is clean.
The utility model discloses the shale semicoke that the dry distillation produced gets into the combustion chamber, fully burns the carbon in the semicoke with remaining oil, and organic matter, S element etc. that high temperature burning contained in the shale semicoke simultaneously removes, and the purer shale ash of output and flue gas, the high temperature flue gas after the purification return the desiccator as the heat source, carries out tailings and waste heat utilization, and the shale ash after the purification is according to market, and the direct production has valuable product.
The utility model adopts resistance heating as the heat source of dry distillation, the temperature control precision is high, the temperature uniformity of the temperature zone is good, and the shale oil quality is ensured; the yield is not limited by the furnace type, the size of the rotary kiln can be designed according to the actual yield requirement, and continuous production is realized; the three wastes are less generated in the smelting process, and the combustion chamber and the dust removing equipment in the system have purifying capacity, so that the final product meets the requirement of environmental protection.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, and that the scope of the invention is defined by the appended claims.
Claims (10)
1. The utility model provides an oil shale vacuum electrical heating continuous dry distillation system, includes rubbing crusher (1) and oil storage tank (17), its characterized in that: the device also comprises a screening machine (3), a pelletizer (5), a drying machine (8), an electric heating vacuum rotary kiln (13), a tubular condenser (15) and a control component; the output end of the pulverizer (1) is connected with the sieving machine (3); the output end of the sieving machine (3) is respectively connected with the pelletizer (5) and the dryer (8); the output end of the pelletizer (5) is also connected with the dryer (8); the output end of the dryer (8) is connected with the electric heating vacuum rotary kiln (13); the gas phase output end of the electric heating vacuum rotary kiln (13) is connected with the tubular condenser (15), the liquid phase output end of the tubular condenser (15) is connected with the oil storage tank (17), and the screening machine (3), the pelletizer (5), the drying machine (8), the electric heating vacuum rotary kiln (13) and the tubular condenser (15) are respectively electrically connected with the control assembly.
2. The oil shale vacuum electric heating continuous dry distillation system as claimed in claim 1, wherein: the screening range of the screening machine (3) is d <6mm and 6mm & lt d & lt 30mm.
3. The oil shale vacuum electric heating continuous dry distillation system as claimed in claim 1, wherein: be equipped with first closed belt feeder (2) between rubbing crusher (1) and screening machine (3), be equipped with second closed belt feeder (4) between screening machine (3) and pelletizer (5), first closed belt feeder (2) and second closed belt feeder (4) are connected with the control assembly electricity respectively.
4. The oil shale vacuum electric heating continuous dry distillation system as claimed in claim 1, wherein: a first large-inclination-angle belt conveyor (6) or a bucket elevator is respectively arranged between the sieving machine (3), the pelletizer (5) and the drying machine (8); and a drying storage bin (7) is arranged between the first large-inclination-angle belt conveyor (6) or the bucket elevator and the dryer (8), the drying storage bin (7) is arranged at the top of the dryer (8), and the first large-inclination-angle belt conveyor (6) is electrically connected with the control assembly.
5. The oil shale vacuum electric heating continuous dry distillation system as claimed in claim 1, wherein: be equipped with transition storage silo (10) and vacuum carbonization storage silo (12) between desiccator (8) output and electrical heating vacuum rotary kiln (13), transition storage silo (10) set up in desiccator (8) bottom, desiccator (8) are connected through material pipe (9) with transition storage silo (10), transition storage silo (10) are connected through big inclination belt conveyor (11) of second with vacuum carbonization storage silo (12), vacuum carbonization storage silo (12) set up in electrical heating vacuum rotary kiln (13) top, big inclination belt conveyor (11) of second are connected with the control assembly electricity.
6. The oil shale vacuum electric heating continuous dry distillation system as claimed in claim 1, wherein: the electric heating vacuum rotary kiln (13) consists of an electric heating module, a kiln body and a discharging device, wherein the electric heating module is arranged in the kiln body, the kiln body is connected with the discharging device, the gas phase output end of the kiln body is connected with the tubular condenser (15), and the electric heating module and the discharging device group are respectively and electrically connected with the control assembly; the electric heating modules adopt resistance wires and resistance belts as heating elements, the electric heating modules are 9 groups, the 9 groups of electric heating modules are respectively arranged along the kiln tail to the kiln head of the furnace body, so that the furnace body forms 9 temperature zones, and the temperature of each temperature zone from the kiln tail to the kiln head is 500 ℃, 510 ℃, 520 ℃, 530 ℃, 540 ℃, 530 ℃, 520 ℃, 510 ℃ and 500 ℃ in sequence; the pressure P in the furnace body is less than 5kPa.
7. The oil shale vacuum electric heating continuous dry distillation system according to claim 6, wherein: be equipped with heat preservation air exhaust pipeline (14) between the gaseous phase output of electrical heating vacuum rotary kiln (13) and tubular condenser (15), be provided with dolly track (25) between the discharge device of electrical heating vacuum rotary kiln (13) and combustion chamber (26), install on dolly track (25) and transport dolly (24), desiccator (8) are connected through heat preservation flue gas pipeline (27) to the gaseous phase output of combustion chamber (26), and combustion chamber (26) is connected with the control assembly electricity.
8. The oil shale vacuum electric heating continuous dry distillation system as claimed in claim 1, wherein: the gas phase output end of the tubular condenser (15) is sequentially connected with a vacuum unit (19), a dust removal and purification device (21) and a tail gas emission device (23), and the vacuum unit (19), the dust removal and purification device (21) and the tail gas emission device (23) are respectively and electrically connected with the control assembly; the gas phase output end of the tubular condenser (15) is connected with a vacuum unit (19) through a first flue gas pipeline (18), the vacuum unit (19) is connected with a dust removal purification device (21) through a second flue gas pipeline (20), and the dust removal purification device (21) is connected with a tail gas emission device (23) through a third flue gas pipeline (22).
9. The oil shale vacuum electric heating continuous dry distillation system as claimed in claim 1, wherein: and the gas phase output end of the dryer (8) is connected with the dust removal and purification equipment (21) through a fourth flue gas pipeline (28).
10. The oil shale vacuum electric heating continuous dry distillation system as claimed in claim 1, wherein: and the liquid phase output end of the tubular condenser (15) is connected with an oil storage tank (17) through an oil guide pipeline (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222798905.0U CN218710177U (en) | 2022-10-24 | 2022-10-24 | Oil shale vacuum electric heating continuous dry distillation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222798905.0U CN218710177U (en) | 2022-10-24 | 2022-10-24 | Oil shale vacuum electric heating continuous dry distillation system |
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| Publication Number | Publication Date |
|---|---|
| CN218710177U true CN218710177U (en) | 2023-03-24 |
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|---|---|---|---|
| CN202222798905.0U Active CN218710177U (en) | 2022-10-24 | 2022-10-24 | Oil shale vacuum electric heating continuous dry distillation system |
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| Country | Link |
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| CN (1) | CN218710177U (en) |
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2022
- 2022-10-24 CN CN202222798905.0U patent/CN218710177U/en active Active
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