阅读说明：本技术 一种废油脂煮煤的装置及其使用方法 (Device for boiling coal by using waste oil and fat and use method thereof ) 是由 张继龙 杨艳芳 于 2020-05-14 设计创作，主要内容包括：本发明公开一种废油脂煮煤的装置及其使用方法。所述装置包括依次连接的脱杂提纯塔、油脂储槽和废油脂煮煤器,破碎机依次连接提升机和废油脂煮煤器,废油脂煮煤器中有搅拌机、出料阀、固体出料口、过滤筛、推煤机,固体出料口连接传送带,废油脂煮煤器的底部连接第一压滤机,侧部连接第二压滤机,传送带连接煤仓,第一压滤机下部放置矿物贮槽、侧底部连接压滤水池,第二压滤机下部放置煤泥贮槽,侧底部连接分馏塔,分馏塔顶部连接收集罐、底部连接油脂储槽。本发明将废油脂作为褐煤提质加工的介质,使废油脂变废为宝并循环利用,开发了废油脂利用和褐煤提质的新途径；在室温就可以实现褐煤脱水,操作简单方便、应用范围广、不产生废物、利于环保。(The invention discloses a device for boiling coal by using waste oil and fat and a using method thereof. The device is including the miscellaneous purification tower of taking off that connects gradually, grease storage tank and waste oil fat boil coal ware, the breaker connects gradually lifting machine and waste oil fat boil coal ware, there is the mixer in the waste oil fat boils coal ware, the bleeder valve, the solid discharge gate, the filter sieve, the coal pusher, the conveyer belt is connected to the solid discharge gate, first pressure filter is connected to the bottom of waste oil fat boil coal ware, the second pressure filter is connected to the lateral part, the coal bunker is connected to the conveyer belt, mineral storage tank is placed to first pressure filter lower part, the filter-pressing pond is connected to the side bottom, the coal slime storage tank is placed to second pressure filter lower part, the fractionating tower is connected to the side bottom, the fractionating tower top is connected. The invention takes the waste oil as the medium for upgrading the lignite, so that the waste oil is changed into valuable and recycled, and a new approach for utilizing the waste oil and upgrading the lignite is developed; the lignite dehydration can be realized at room temperature, the operation is simple and convenient, the application range is wide, no waste is generated, and the environment is protected.)

1. The utility model provides a device of waste oil boiling coal which characterized in that: the device comprises a impurity-removing purification tower, an oil storage tank and a waste oil coal boiler which are connected in sequence, wherein a crusher is connected with a lifter and the waste oil coal boiler in sequence; the upper part of the waste oil coal boiler is provided with a stirring kettle, a stirrer is arranged in the stirring kettle, the bottom of the stirring kettle is provided with a discharge valve, the bottom of the discharge valve is connected with a conical kettle, the upper part of the conical kettle is provided with a filter sieve, the filter sieve is arranged in an inclined manner, one side of the filter sieve is provided with a solid discharge port, the other side of the filter sieve is provided with a coal pushing rod connected with a coal pusher, the bottom of the conical kettle is provided with an oil outlet, and the bottom; the solid discharge port is connected with a conveyor belt, the bottom of the waste oil and fat coal boiler is connected with a first filter press, the side part of the waste oil and fat coal boiler is connected with a second filter press, the top of the waste oil and fat coal boiler and the side part under the filter screen are connected with control valves, the control valves are connected with converters, the converters are respectively connected with an inert gas bottle and a vacuum pump, the conveyor belt is connected with a coal bunker, the lower part of the first filter press is provided with a mineral storage tank, the side bottom of the first filter press is connected with a filter-pressing water tank, the lower part of the second filter press is provided with a coal.

2. The apparatus for cooking coal from waste oil according to claim 1, wherein: the crusher is one of a ball mill, a rod mill, a hammer stone crusher and a drum crusher.

3. The apparatus for cooking coal from waste oil according to claim 1, wherein: the stirrer can stir horizontally or vertically or in an angle.

4. The apparatus for cooking coal from waste oil according to claim 1, wherein: the filter screen forms an included angle of 0-60 degrees with the horizontal plane; the aperture range of a sieve plate in the filter sieve is 0.045 mm-3 mm; the included angle between the coal pushing rod and the sieve plate ranges from 85 degrees to 45 degrees.

5. The apparatus for cooking coal from waste oil according to claim 4, wherein: the filter screen forms an included angle of 15-45 degrees with the horizontal plane; the aperture of the sieve plate in the filter sieve is 0.075 mm-0.5 mm.

6. The use method of the waste oil and fat coal boiling device according to any one of claims 1 to 5 is characterized in that: the waste oil and fat enters an oil and fat storage tank after passing through a impurity removal and purification tower, and then is added into a waste oil and fat coal boiler according to a proportion; after being crushed by a crusher, lignite is added from the top of a waste oil and fat coal boiler by a lifter, is mixed with waste oil and fat under the stirring of a stirrer, is stirred under the vacuum or inert atmosphere, then enters the lower part of the waste oil and fat coal boiler through a discharge valve, and is subjected to vacuum filtration to separate upgraded lignite from liquid; after the suction filtration is finished, the upgraded lignite is pushed out of the solid discharge port along the filter screen by the coal pushing rod and falls into the conveyor belt, and the upgraded lignite is conveyed to the coal bunker by the conveyor belt; standing and layering the liquid at the bottom of a waste oil and fat coal boiler, allowing the upper layer of oil and fat to enter a filter press from the side part for filter pressing, allowing the pure oil and fat to enter a fractionating tower, and allowing the filtered coal slime to fall into a coal slime storage tank and then to be conveyed to a coal bunker; the separated water at the lower layer enters a filter press from the bottom for filter pressing, the mineral substances filtered by the filter press fall into a mineral storage tank, and the filter pressing water enters a filter pressing water tank; the absorbed micromolecular organic matter distilled from the top of the fractionating tower enters a collecting tank, and the grease at the bottom of the fractionating tower enters a grease storage tank for recycling.

7. The use method of the waste oil and fat coal boiling device according to claim 6 is characterized by comprising the following steps:

(1) adding waste oil into a impurity-removing purification tower, wherein the impurity-removing purification tower is connected with an oil storage tank, the oil storage tank is connected with a waste oil coal boiler, and pure oil is added into the waste oil coal boiler according to the oil coal mass ratio of 5-10: 1;

(2) adding lignite into a crusher for crushing, wherein the crusher is connected with a lifter, the lifter is connected with a waste oil and fat coal boiler, adding the crushed lignite from the top of the waste oil and fat coal boiler by the lifter, mixing the crushed lignite and the waste oil and fat under the stirring of a stirrer, and stirring for 1-24 hours at 0-300 ℃ in a vacuum or inert atmosphere;

(3) the processed oil-coal mixture enters the lower part of the waste oil-fat coal boiler through a discharge valve, a vacuum pump is started to regulate a control valve for vacuum filtration, upgraded lignite is separated from liquid, inert gas is introduced to recover to normal pressure after filtration, the upgraded lignite is pushed out of a discharge port of the upgraded lignite along a filtering screen surface through a coal pushing rod and falls into a conveyor belt, and the upgraded lignite is conveyed to a coal bunker through the conveyor belt;

(4) standing and layering the liquid obtained by vacuum filtration at the bottom of a waste oil and fat coal boiler, introducing the oil and fat on the upper layer into a filter press from the side part for filter pressing after an obvious oil and water layer appears, pumping the pure oil and fat obtained by filter pressing into a fractionating tower, and conveying the coal slime obtained by filter pressing to a coal bunker after the coal slime falls into a coal slime storage tank from the lower part of the filter press;

(5) discharging lower layer separated water obtained after liquid at the bottom of the waste oil coal boiler is layered from the bottom into a filter press for filter pressing, allowing the press-filtered mineral substances to fall into a mineral storage tank from the lower part of the filter press, and putting the press-filtered water into a press-filtering water tank;

(6) the oil entering the fractionating tower distills out the absorbed micromolecule organic matter from the top of the tower and enters a collecting tank, and the oil from the bottom of the tower enters an oil storage tank for recycling.

8. The use method of the waste oil and fat coal boiling device according to claim 7, characterized in that: the waste oil is one or more of swill-cooked dirty oil, hogwash oil, frying oil, overdue edible oil and leftover oil in slaughter houses, and also comprises oil produced by biological microalgae and non-grain oil crops;

the impurity removal and purification refers to degumming, impurity removal and deodorization treatment.

9. The use method of the waste oil and fat coal boiling device according to claim 7, characterized in that: the set temperature range in the step (2) is room temperature-150 ℃;

the atmosphere is vacuum or inert atmosphere, the vacuum degree is-0.1 MPa-0 MPa, the inert gas is one of nitrogen, helium, argon and neon, and the pressure of the inert atmosphere is 0 MPa-1 MPa.

10. The use method of the waste oil and fat coal boiling device according to claim 7, characterized in that: the distillation temperature of the fractionating tower is set within the range of 100 ℃ to 250 ℃.

Technical Field

The invention relates to a device for boiling coal by using waste oil and fat and a using method thereof, belonging to the field of waste oil and fat utilization technology and coal processing. In particular to a device and a using method for dehydrating and demineralizing lignite by using waste oil and fat such as frying oil, waste oil, hogwash oil, overdue oil and the like as a medium so as to improve the coal quality of lignite.

Background

The returning of the illegal cooking oil to the dining table can seriously harm the health of people, and the sources of the illegal cooking oil are wide, such as frying oil, illegal cooking oil, hogwash oil, overdue oil and the like. The 'illegal cooking oil' generally refers to the grease produced and processed by non-food raw materials such as kitchen waste, meat processing waste, livestock and poultry products with unqualified inspection and quarantine, and the like. Because animal and vegetable oil can generate carcinogens such as aflatoxin, benzopyrene and the like with high toxicity after being oxidized at high temperature, the animal and vegetable oil causes great harm to the health of people. Therefore, the research and development of the utilization of the waste grease has important social value and significance for benefiting and guaranteeing the healthy life of people.

Coal occupies a major part in energy consumption structures in China and even the world, but if the process and the technology are imperfect, environmental pollution such as air pollution (PM 2.5), water body pollution (wastewater discharge) and the like can be caused in the utilization process of the coal. Coal is divided into three major categories of lignite, bituminous coal and anthracite according to the difference of metamorphic degrees, and the bituminous coal is subdivided into 12 subclasses. The metamorphic degree directly determines the utilization way and mode of coal, for example, anthracite with high metamorphic degree is used for preparing chemical fertilizers such as synthetic ammonia, urea and the like, bituminous coal with high metamorphic degree can be used for coking, and lignite with low metamorphic degree can be used for preparing chemicals through gasification or liquefaction, and lignite is mainly used for heating and power generation. The value or market price of coal is positively correlated with the degree of deterioration, i.e. the higher the degree of deterioration, the higher the value, so improving the quality of coal (upgrading for short) is an important means and method for coal resource utilization. Coal upgrading mainly aims to improve the content of organic matters (substances containing carbon and hydrogen), reduce the content of oxygen, nitrogen, sulfur and mineral substances, such as reducing the content of the mineral substances (commonly called ash) through washing, reducing the content of water through drying, improving the content of fixed carbon through discharging small molecular substances through pyrolysis and the like. At present, a plurality of research methods for improving the quality of coal by reducing the water content are provided, in particular to the dehydration and quality improvement of lignite, Chinese patent CN104178191A mentions that lignite accounts for 40% of the global reserves and 13% of the Chinese reserves, and is not beneficial to long-distance transportation and storage due to high water content (about 20% -60%), low heat value, easy weathering and spontaneous combustion and high unit energy transportation cost. The lignite upgrading technology at home and abroad can be roughly divided into three major types (the progress of lignite upgrading technology research in Chengzhou and the like, coal science and technology, 2011, 39 (11): 121-plus 125). The Chinese patent CN106433852A discloses a lignite upgrading device, which has low energy consumption in the lignite upgrading process and is beneficial to improving the energy-saving effect, and mainly relates to an airflow crushing dryer, a gas-solid separation device, a forming device and the like. Chinese patent CN102352272A invented a lignite upgrading device capable of effectively controlling total heat in a drying chamber, a heat source was provided by a waste heat boiler, cooling was realized by a fan, and the effect was reflected in that the total heat in the drying chamber could be effectively controlled after a heat collector was added between the drying chamber and a temperature-regulating chamber, thereby well controlling the quality of treated lignite.

In conclusion, the lignite upgrading device mainly realizes dehydration through heating modes such as steam and flue gas and a drying chamber (device). In fact, the ash content of lignite is also high, generally 20-30% (and even as high as 50%) and demineralization should also be an important objective for lignite upgrading. The quality improving device for dehydrating and removing minerals is an innovative idea for improving the quality of lignite and has a better development prospect.

Disclosure of Invention

The invention aims to provide a device for boiling coal by using waste oil and fat and a using method thereof, aims to dehydrate and demineralize lignite by using the waste oil and fat as a heat transfer medium, realizes lignite upgrading while solving the problem of waste oil and fat utilization, and particularly relates to a device for dehydrating and demineralizing lignite by boiling coal by using the waste oil and fat and a using method thereof.

The principle of the invention is as follows: after the lignite is crushed, fine coal particles and mineral substances are generated, waste oil and fat are used as a heat transfer medium to be heated and heated, when the temperature is higher than 100 ℃, free water adsorbed in the coal particles can be released in the form of gas to enter the waste oil and fat and form water insoluble in the oil and fat, and meanwhile, the waste oil and fat enter gaps of the coal particles. The water density moves downwards compared with the weight of the oil, the mineral oil is hydrophilic, the mineral oil enters water drops to settle downwards, after the reaction is finished, water, minerals and the oil in the lignite are layered on the lower layer, the upgraded lignite is arranged on the upper layer of the oil, and the upgraded lignite is obtained through filter pressing.

The invention provides a waste oil and fat coal boiling device, which comprises a impurity removal and purification tower, an oil storage tank and a waste oil and fat coal boiling device which are sequentially connected, wherein a crusher is sequentially connected with a lifter and the waste oil and fat coal boiling device, the upper part of the waste oil and fat coal boiling device is a stirring kettle, a stirrer is arranged in the stirring kettle, the bottom of the stirring kettle is provided with a discharge valve, the bottom of the discharge valve is connected with a conical kettle, the upper part of the conical kettle is provided with a filter sieve, the filter sieve is obliquely arranged, one side of the filter sieve is provided with a solid discharge hole, the other side of the filter sieve is provided with a coal pushing rod connected with a coal pushing machine, the bottom; the solid discharge port is connected with a conveyor belt, the bottom of the waste oil and fat coal boiler is connected with a first filter press, the side part of the waste oil and fat coal boiler is connected with a second filter press, the top of the waste oil and fat coal boiler and the side part under the filter screen are connected with control valves, the control valves are connected with converters, the converters are respectively connected with an inert gas bottle and a vacuum pump, the conveyor belt is connected with a coal bunker, the lower part of the first filter press is provided with a mineral storage tank, the side bottom of the first filter press is connected with a filter-pressing water tank, the lower part of the second filter press is provided with a coal.

In the above device, the crusher is one of a ball mill, a rod mill, a hammer crusher and a roller crusher.

In the above device, the stirrer can stir horizontally or vertically or at an angle.

In the above device, the filter screen forms an angle of 0 to 60 degrees with the horizontal plane, preferably 15 to 45 degrees.

In the above device, the aperture of the sieve plate in the filter sieve is in the range of 0.045 mm-3 mm, preferably 0.075 mm-0.5 mm.

In the device, the included angle between the coal pushing rod and the sieve plate ranges from 85 degrees to 45 degrees.

The invention provides a using method of the device for boiling coal by using waste oil, wherein the waste oil enters an oil storage tank after passing through a impurity removal and purification tower, and is added into a waste oil coal boiling device according to the oil-coal mass ratio of 5-10: 1; after being crushed by a crusher, lignite is added from the top of a waste oil and fat coal boiler by a lifter, is mixed with waste oil and fat under the stirring of a stirrer, is stirred for 1-24 hours at 0-300 ℃ in vacuum or inert atmosphere, then enters the lower part of the waste oil and fat coal boiler through a discharge valve, and is subjected to vacuum filtration to separate upgraded lignite from liquid; after the suction filtration is finished, the upgraded lignite is pushed out of the solid discharge port along the filter screen by the coal pushing rod and falls into the conveyor belt, and the upgraded lignite is conveyed to the coal bunker by the conveyor belt; standing and layering the liquid at the bottom of a waste oil and fat coal boiler, allowing the upper layer of oil and fat to enter a filter press from the side part for filter pressing, allowing the pure oil and fat to enter a fractionating tower, and allowing the filtered coal slime to fall into a coal slime storage tank and then to be conveyed to a coal bunker; the separated water at the lower layer enters a filter press from the bottom for filter pressing, the mineral substances filtered by the filter press fall into a mineral storage tank, and the filter pressing water enters a filter pressing water tank; the absorbed micromolecular organic matter distilled from the top of the fractionating tower enters a collecting tank, and the grease at the bottom of the fractionating tower enters a grease storage tank for recycling.

The use method of the waste oil and fat coal boiling device specifically comprises the following steps:

(1) adding waste oil into a impurity-removing purification tower, wherein the impurity-removing purification tower is connected with an oil storage tank, the oil storage tank is connected with a waste oil coal boiler, and pure oil is added into the waste oil coal boiler according to the oil coal mass ratio of 5-10: 1;

(2) adding lignite into a crusher for crushing, wherein the crusher is connected with a lifter, the lifter is connected with a waste oil and fat coal boiler, adding the crushed lignite from the top of the waste oil and fat coal boiler by the lifter, mixing the crushed lignite and the waste oil and fat under the stirring of a stirrer, and stirring for 1-24 hours at 0-300 ℃ in a vacuum or inert atmosphere;

(3) the processed oil-coal mixture enters the lower part of the waste oil-fat coal boiler through a discharge valve, a vacuum pump is started to regulate a control valve for vacuum filtration, upgraded lignite is separated from liquid, inert gas is introduced to recover to normal pressure after filtration, the upgraded lignite is pushed out of a discharge port of the upgraded lignite along a filtering screen surface through a coal pushing rod and falls into a conveyor belt, and the upgraded lignite is conveyed to a coal bunker through the conveyor belt;

(4) standing and layering the liquid obtained by vacuum filtration at the bottom of a waste oil and fat coal boiler, introducing the oil and fat on the upper layer into a filter press from the side part for filter pressing after an obvious oil and water layer appears, pumping the pure oil and fat obtained by filter pressing into a fractionating tower, and conveying the coal slime obtained by filter pressing to a coal bunker after the coal slime falls into a coal slime storage tank from the lower part of the filter press;

(5) discharging lower layer separated water obtained after liquid at the bottom of the waste oil coal boiler is layered from the bottom into a filter press for filter pressing, allowing the press-filtered mineral substances to fall into a mineral storage tank from the lower part of the filter press, and putting the press-filtered water into a press-filtering water tank;

(6) the oil entering the fractionating tower distills out the absorbed micromolecule organic matter from the top of the tower and enters a collecting tank, and the oil from the bottom of the tower enters an oil storage tank for recycling.

In the use method, the waste oil is one or more of waste oil, hogwash oil, frying oil, overdue edible oil and leftover oil in slaughter houses, and also comprises oil prepared from biological microalgae or non-grain oil crops.

In the using method, the impurity removal and purification refers to degumming, impurity removal and deodorization treatment.

In the above method of use, the temperature range set in step (2) is from 0 ℃ to 300 ℃, preferably from room temperature to 150 ℃.

In the using method, the atmosphere in the step (2) is vacuum or inert atmosphere, the vacuum degree is-0.1 MPa-0 MPa, the inert gas is one of nitrogen, helium, argon and neon, and the pressure of the inert atmosphere is 0 MPa-1 MPa.

In the above method of use, the distillation temperature of the fractionating tower is set to be in the range of 100 ℃ to 250 ℃.

The invention has the beneficial effects that:

(1) the waste oil is used as a medium for upgrading lignite, so that the waste oil is changed into valuables and recycled, and a new way for utilizing the waste oil is developed;

(2) the lignite upgrading method provided by the invention changes the heating dehydration mode of gas heat transfer, the applied temperature condition is more optimized, lignite dehydration can be realized at room temperature, not only the moisture in lignite is effectively removed, but also the mineral substances of fine particles are removed, and the heat value of lignite is greatly improved;

(3) the device is simple and convenient to operate, wide in application range, free of waste and beneficial to environmental protection.

Drawings

FIG. 1 is a schematic view of an apparatus for cooking coal with waste oil.

FIG. 2 is a schematic structural diagram of a waste oil coal boiler.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a top view of fig. 2.

In the figure, 1-a impurity removal purification tower; 2-a grease storage tank; 3-a waste oil coal boiler; 4-a crusher; 5, a hoisting machine; 6, a stirrer; 7-a discharge valve; 8-solid discharge port; 9, a conveyor belt; 10-a coal bunker; 11-a first filter press; 12-mineral storage tank; 13-filter pressing water tank; 14-a filter sieve; 15 — a first control valve; 16-a coal pusher; 17-a coal pushing rod; 18-a second control valve; 19-a converter; 20-inert gas bottle; 21-a vacuum pump; 22-a second filter press; 23-coal slurry storage tank; 24-a fractionation column; 25-a collection tank; and 26-oil outlet. A is waste oil and fat, and B is lignite.

Detailed Description

The present invention is further illustrated by, but is not limited to, the following examples.

As shown in figure 1, the invention provides a waste oil and fat coal boiling device, which comprises a impurity removal and purification tower 1, an oil storage tank 2 and a waste oil and fat coal boiling device 3 which are connected in sequence, wherein a crusher is connected with a lifter and then connected with the waste oil and fat coal boiling device 3, a stirrer 6, a discharge valve 7, a solid discharge port 8, a filter sieve 14 and a coal pushing machine 16 are arranged in the waste oil and fat coal boiling device 3, the solid discharge port 8 is connected with a conveyor belt 9, the bottom of the waste oil and fat coal boiling device 3 is connected with a first filter press 11, the side part of the waste oil and fat coal boiling device is connected with a second filter press 22, the top of the waste oil and fat coal boiling device 3 and the lower part of the filter sieve 14 are respectively connected with a second control valve 18 and a first control valve 15, the two control valves are connected with a converter 19, the converter 19 is respectively connected with an inert gas bottle 20 and a vacuum pump 21, the, the lower part of the second filter press 22 is provided with a coal slime storage tank 23, the side bottom part is connected with a fractionating tower 24, the top part of the fractionating tower 24 is connected with a collecting tank 25, and the bottom part is connected with a grease storage tank 2.

The upper portion of the waste oil coal boiler 3 is a stirring kettle, a stirrer 6 is arranged in the stirring kettle, a discharge valve 7 is arranged at the bottom of the stirring kettle, the bottom of the discharge valve 7 is connected with a conical kettle, a filter sieve 14 is arranged at the upper portion of the conical kettle, the filter sieve 14 is arranged in an inclined mode, a solid discharge port 8 is arranged on one side of the filter sieve 14, a coal pushing rod 17 connected with a coal pusher 16 is arranged on the other side of the filter sieve, an oil outlet 26 is arranged on the side face of the bottom of the conical kettle, and a water outlet.

In the above device, the crusher is one of a ball mill, a rod mill, a hammer crusher and a roller crusher.

In the above device, the stirrer can stir horizontally or vertically or at an angle.

In the above device, the filter screen forms an angle of 0 to 60 degrees with the horizontal plane, preferably 15 to 45 degrees.

In the above device, the aperture of the sieve plate in the filter sieve is in the range of 0.045 mm-3 mm, preferably 0.075 mm-0.5 mm.

In the device, the included angle between the coal pushing rod and the sieve plate ranges from 85 degrees to 45 degrees.

The invention provides a using method of the device for boiling coal by using waste oil, wherein the waste oil enters an oil storage tank after passing through a impurity removal and purification tower, and is added into a waste oil coal boiling device according to the oil-coal ratio of 5-10: 1; after being crushed by a crusher, lignite is added from the top of a waste oil and fat coal boiler by a lifter, is mixed with waste oil and fat under the stirring of a stirrer, is stirred for 1-24 hours at 0-300 ℃ in vacuum or inert atmosphere, then enters the lower part of the waste oil and fat coal boiler through a discharge valve, and is separated from liquid by vacuum filtration; after the suction filtration is finished, the upgraded lignite is pushed out of the solid discharge port along the filter screen by the coal pushing rod and falls into the conveyor belt, and the upgraded lignite is conveyed to the coal bunker by the conveyor belt; standing and layering the liquid at the bottom of a waste oil and fat coal boiler, allowing the upper layer of oil and fat to enter a filter press from the side part for filter pressing, allowing the pure oil and fat to enter a fractionating tower, and allowing the filtered coal slime to fall into a coal slime storage tank and then to be conveyed to a coal bunker; the separated water at the lower layer enters a filter press from the bottom for filter pressing, the mineral substances filtered by the filter press fall into a mineral storage tank, and the filter pressing water enters a filter pressing water tank; the absorbed micromolecular organic matter distilled from the top of the fractionating tower enters a collecting tank, and the grease at the bottom of the fractionating tower enters a grease storage tank for recycling.

The use method of the waste oil and fat coal boiling device specifically comprises the following steps:

(1) adding waste oil into a impurity-removing purification tower, wherein the impurity-removing purification tower is connected with an oil storage tank, the oil storage tank is connected with a waste oil coal boiler, and pure oil is added into the waste oil coal boiler according to the oil coal mass ratio of 5-10: 1;

(2) adding lignite into a crusher for crushing, wherein the crusher is connected with a lifter, the lifter is connected with a waste oil and fat coal boiler, the crushed lignite is added from the top of the waste oil and fat coal boiler by the lifter, is mixed with the waste oil and fat under the stirring of a stirrer, and is stirred for 1-24 hours at the temperature of 0-300 ℃ in a vacuum or inert atmosphere;

(3) the processed oil-coal mixture enters the lower part of the waste oil-fat coal boiler through a discharge valve, a vacuum pump is started to regulate a control valve for vacuum filtration, upgraded lignite is separated from liquid, inert gas is introduced to recover to normal pressure after filtration, the upgraded lignite is pushed out of a discharge port of the upgraded lignite along a filtering screen surface through a coal pushing rod and falls into a conveyor belt, and the upgraded lignite is conveyed to a coal bunker through the conveyor belt;

(4) standing and layering the liquid obtained by vacuum filtration at the bottom of a waste oil and fat coal boiler, introducing the oil and fat on the upper layer into a filter press from the side part for filter pressing after an obvious oil and water layer appears, pumping the pure oil and fat obtained by filter pressing into a fractionating tower, and conveying the coal slime obtained by filter pressing to a coal bunker after the coal slime falls into a coal slime storage tank from the lower part of the filter press;

(5) discharging lower layer separated water obtained after liquid at the bottom of the waste oil coal boiler is layered from the bottom into a filter press for filter pressing, allowing the press-filtered mineral substances to fall into a mineral storage tank from the lower part of the filter press, and putting the press-filtered water into a press-filtering water tank;

(6) the oil entering the fractionating tower distills out the absorbed micromolecule organic matter from the top of the tower and enters a collecting tank, and the oil from the bottom of the tower enters an oil storage tank for recycling.

In the use method, the waste oil is one or more of waste oil, hogwash oil, frying oil, overdue edible oil and leftover oil in slaughter houses, and also comprises oil prepared from biological microalgae, non-grain oil crops and the like.

In the using method, the impurity removal and purification refers to degumming, impurity removal and deodorization treatment.

In the above use method, the set temperature range in the step (2) is 0 ℃ to 300 ℃, preferably room temperature to 150 ℃.

In the using method, the atmosphere in the step (2) is vacuum or inert atmosphere, the vacuum degree is-0.1 MPa-0 MPa, the inert gas is one of nitrogen, helium, argon and neon, and the pressure of the inert atmosphere is 0 MPa-1 MPa.

In the above method of use, the distillation temperature of the fractionating tower is set to be in the range of 100 ℃ to 250 ℃.