Fuel treatment system based on oil-based rock debris

Abstract

The utility model discloses a fuel treatment system based on oil-based rock debris, relates to the field of oil-based rock debris treatment, and solves the technical problems that an existing oil-based rock debris treatment mode easily causes environmental pollution and wastes resources. The device comprises a storage pool, a hopper elevator, a flour mill, a cylindrical silo and a stirrer, the stirrer is provided with an oil-based rock debris feeding port and a coal feeding port, oil-based rock debris is stored in the storage pool, the storage pool is communicated with the oil-based rock debris feeding port of the stirrer through a pipeline, a discharging port of the stirrer is communicated with a feeding port of the hopper elevator, and a discharging port of the hopper elevator is communicated with a discharging port of the coal mill. A discharge port of the hopper elevator is communicated with a feed port of the cylindrical silo, a discharge port of the cylindrical silo is communicated with a briquette coal ball press machine, and a discharge port of the briquette coal ball press machine is communicated with an automatic weighing feeder. According to the utility model, the land pollution is avoided, and the possible environmental pollution in the transportation and disposal process is avoided.

Description

Technical Field

[0001] The utility model relates to the field of oil-based rock cuttings disposal, and more specifically, to a fuel processing system based on oil-based rock cuttings. Background Art

[0002] The production of oil-based rock cuttings in my country is growing at a rate of millions of cubic meters per year. Because oil-based rock cuttings are rich in heavy metals, benzene series, polycyclic aromatic hydrocarbons, alkali metal salts and other difficult-to-degrade and biotoxic substances, they pose high environmental risks. Oil-based rock cuttings have been included in the National List of Hazardous Wastes (waste category: HW08). As a typical type of hazardous waste, oil-based rock cuttings are difficult to transport and dispose of, with high costs. Improper disposal will cause serious harm to the ecological environment and human health.

[0003] At present, the disposal methods for oil-based rock cuttings at home and abroad mainly include solidification landfill, solvent extraction, microbial method, pyrolysis, incineration and other single disposal methods. At present, there are few examples of burning oil-based rock cuttings in coal-fired boilers at home and abroad, and there is no mature technical route for reference. The disposal cost of each ton of oil-based rock cuttings is more than 2,000 yuan. The high disposal fee has become a heavy burden for shale gas development units. A large number of valuable components have not been effectively recycled, resulting in a huge waste of resources.

[0004] At present, there are many problems in the process of shale gas extraction, such as difficulty in harmless disposal of oil-based rock cuttings, large investment, and low resource utilization rate. There is still a lack of mature and reliable process technology routes. The main problems are as follows:

[0005] (1) Solidification landfill is still the main way to deal with oil-based rock cuttings at home and abroad. This technology requires a large amount of land and is prone to leakage, causing environmental pollution. It has high requirements on the geological environment of the landfill site.

[0006] (2) Solvent extraction method: This technology must be carried out under high pressure conditions of 18MPa to 25MPa, which will bring certain energy consumption and danger. At the same time, there are risks in the operation and management of high-pressure equipment, and its application in large-scale projects will be limited.

[0007] (3) The microbial method uses organic matter in oil-based rock cuttings as a carbon source and utilizes microorganisms to decompose the carbon source into small molecules such as water and CO2. However, this technology has a long processing cycle and is difficult to decompose large molecules such as asphalt and colloid, which can easily lead to a waste of resources.

[0008] (4) The pyrolysis method for oil-based rock cuttings requires a large investment in equipment and the desorbed oil needs to be deodorized. In addition, the pyrolysis method cannot treat substances in the dilute oil metal slag that exceed the environmental emission requirements, such as barium, lead, and cadmium, which ultimately limits the comprehensive utilization of oil-based rock cuttings.

[0009] (5) The oil-based rock cuttings incineration method cannot recover the heat generated during the incineration process, and will produce various air pollutants, causing secondary pollution. Utility Model Content

[0010] The technical problem to be solved by the utility model is to provide a fuel processing system based on oil-based rock cuttings in view of the deficiencies in the prior art, which can realize clean and efficient disposal of oil-based rock cuttings on coal-fired boilers and solve the technical problem that the existing disposal method of oil-based rock cuttings easily causes environmental pollution and wastes resources.

[0011] The utility model discloses a fuel processing system based on oil-based rock cuttings, which comprises a storage tank, a hopper elevator, a powder making machine, a cylindrical silo and a mixer. The mixer is provided with an oil-based rock cuttings inlet and a coal inlet. The storage tank stores oil-based rock cuttings. The storage tank is connected with the oil-based rock cuttings inlet of the mixer through a pipeline. The outlet of the mixer is connected with the inlet of the hopper elevator. The outlet of the hopper elevator is connected with the inlet of the cylindrical silo. The outlet of the cylindrical silo is connected with a briquette machine. The outlet of the briquette machine is connected with an automatic weighing feeder. The outlet of the automatic weighing feeder is connected with a coal conveying belt. The coal conveying belt is connected with the inlet of the powder making machine.

[0012] As a further improvement, the automatic weighing feeder includes a weighing hopper, a storage hopper and a body, a first wheel is rotatably installed on one end of the body, a second wheel is rotatably installed on the other end of the body, the diameter of the first wheel is larger than that of the second wheel, a plurality of spring shock absorbers with successively decreasing heights are fixedly installed above the body, a roller is rotatably installed above the spring shock absorber, the two wheels and the plurality of rollers are all transmission-connected to a conveyor belt, the first wheel is transmission-connected to the driving end of an external motor, the weighing hopper is fixedly installed above the body through a frame, and the storage hopper is fixedly installed above the weighing hopper through a frame.

[0013] Furthermore, a single screw pump is installed in the pipeline between the storage tank and the mixer.

[0014] Furthermore, a single-tube spiral scale is installed in the coal inlet of the mixer.

[0015] Furthermore, the capacity of the silo is 1-300t.

[0016] Furthermore, the conveying distance of the conveyor belt is 1-10m.

[0017] Furthermore, the mixer is a twin-shaft mixer.

[0018] Furthermore, the discharge port of the briquette press is connected to the feed port of the storage hopper through a conveyor belt conveyor.

[0019] Beneficial Effects

[0020] The advantages of the utility model are:

[0021] 1. The utility model is provided with a storage tank, a mixer, a hopper elevator, a powder making machine, a cylindrical silo, a briquette machine and an automatic weighing feeder. The oil-based rock cuttings and coal in the storage tank are mixed to form a coal-oil-based rock cuttings mixture, and the coal-oil-based rock cuttings mixture is sent to the cylindrical silo for storage through the hopper elevator. The coal-oil-based rock cuttings mixture in the cylindrical silo is sent to the briquette machine for briquetting as needed, and the briquetting mixture is weighed through a weighing hopper, and finally sent to the boiler for high-temperature combustion, so as to achieve the purpose of high-temperature complete combustion of the oil-based rock cuttings, avoid land pollution, and avoid environmental pollution that may occur during transportation and disposal. The mixed combustion and disposal of oil-based rock cuttings in the boiler can effectively utilize the heat contained in the oil-based rock cuttings for combustion, reduce the cost of coal procurement, and can use the boiler's efficient flue gas treatment device to achieve clean disposal of the oil-based rock cuttings.

[0022] 2. The utility model is provided with a weighing hopper, a storage hopper, a first rotating wheel, a second rotating wheel and a plurality of spring shock absorbers and rollers. When the weight on the automatic weighing feeder is constant, the discharge port of the weighing hopper is opened to allow a mixture of a certain weight to enter the powder making machine for grinding. The diameter of the first rotating wheel is greater than the diameter of the second rotating wheel, which facilitates the mixture to slide off the conveyor belt more smoothly and enter the powder making machine, thereby ensuring the safe and stable mixing and firing of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the system of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the automatic weighing feeder of the utility model.

[0025] Among them: 1-storage tank, 2-mixer, 3-hopper elevator, 4-cylinder silo, 5-coal briquette machine, 6-automatic weighing feeder, 7-machine body, 8-first rotor, 9-spring shock absorber, 10-second rotor, 11-drum, 12-conveyor belt, 13-weighing hopper, 14-single screw pump, 15-single tube screw scale, 16-storage hopper, 17-support rod, 18-oil-based rock cuttings inlet, 19-coal inlet, 20-pulverizer. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the embodiments, but does not constitute any limitation to the utility model. Any limited modifications made by anyone within the scope of the claims of the utility model are still within the scope of the claims of the utility model.

[0027] See also Figure 1-Figure 2The utility model discloses a fuel processing system based on oil-based rock chips, which comprises a storage tank 1, a mixer 2, a hopper elevator 3, a pulverizer 20 and a cylindrical silo 4. The mixer 2 is provided with an oil-based rock chip feed port 18 and a coal feed port 19. The oil-based rock chip feed port 18 is used to add the oil-based rock chip in the storage tank 1, and the coal feed port 19 is used to add coal.

[0028] The storage tank 1 is connected to the oil-based rock cuttings inlet of the mixer 2 through a pipeline, and the storage tank 1 is used to store the oil-based rock cuttings. The discharge port of the mixer 2 is connected to the feed port of the hopper elevator 3, and the hopper elevator 3 is used to send the mixed mixture into the cylindrical silo 4 for storage. The discharge port of the hopper elevator 3 is connected to the feed port of the cylindrical silo 4, and the discharge port of the cylindrical silo 4 is connected to a briquette press 5, and the discharge port of the briquette press 5 is connected to an automatic weighing feeder 6, and the discharge port of the automatic weighing feeder 6 is connected to a coal conveying belt, and the coal conveying belt is connected to the feed port of the pulverizer 20, so that the oil-based rock cuttings are completely burned.

[0029] The automatic weighing feeder 6 includes a weighing hopper 13, a storage hopper 16 and a body 7. A first rotating wheel 8 is rotatably mounted on one end of the body 7, and a second rotating wheel 10 is rotatably mounted on the other end of the body 7. The diameter of the first rotating wheel 8 is larger than that of the second rotating wheel 10. A plurality of spring shock absorbers 9 with decreasing heights are fixedly mounted above the body 7. This makes it easier for the mixture to fall into the flour making machine 20.

[0030] A roller 11 is installed above the spring shock absorber 9, the two wheels 8 and the multiple rollers 11 are all connected to the conveyor belt 12, the first wheel 8 is connected to the driving end of the external motor, the weighing hopper 13 is fixedly installed above the body 7 through a frame, and the storage hopper 16 is fixedly installed above the weighing hopper 13 through a frame.

[0031] The driving end of the external motor drives the first rotating wheel 8 to rotate, and the first rotating wheel 8 drives the conveyor belt 12 to rotate. The roller 11 and the spring shock absorber 9 provide support and shock absorption for the conveyor belt 12.

[0032] A single screw pump 14 is installed in the pipeline between the storage tank 1 and the mixer 2. The oil-based rock cuttings in the storage tank 1 are added to the oil-based rock cuttings inlet 18 of the mixer 2 through the single screw pump 14.

[0033] A single-tube spiral scale 15 is installed in the coal inlet of the mixer 2. Coal is quantitatively added to the coal inlet 19 through the single-tube spiral scale 15.

[0034] The discharge port of the briquette press machine 5 is connected with the feed port of the automatic weighing feeder 6 through a conveyor belt conveyor, which is convenient for transportation.

[0035] The capacity of the cylindrical silo 4 is 1-300t. The capacity of the cylindrical silo 4 in this embodiment is 150t.

[0036] The conveying distance of the automatic weighing feeder 6 is 1-10m. In this embodiment, the conveying distance of the automatic weighing feeder 6 is 2m. A plurality of support rods 17 are fixedly installed at the bottom of the automatic weighing feeder 6.

[0037] Mixer 2 is a twin-shaft mixer, which can speed up the mixing process and improve the mixing efficiency and mixing effect.

[0038] A storage hopper 16 is fixedly installed above the weighing hopper 13. A weighing sensor is arranged in the weighing hopper 13 for obtaining the weight in the weighing hopper 13. The two funnels can make the mixture after ball pressing fall onto the conveyor belt 12 of the automatic weighing feeder 6 more easily.

[0039] Oil-based rock cuttings pretreatment, the oil-based rock cuttings are transported from the storage tank 1 to the mixer 2, and raw coal is added in a certain proportion in the mixer 2 for mixing and stirring pretreatment, so that it becomes a uniform solid-like mixture, and its viscosity is reduced to prevent the blockage of machinery and equipment during the transportation process, reduce the impact on the remaining processes and equipment and the secondary pollution to the environment, and facilitate the subsequent further processing.

[0040] Pressing coal into shapes, the quasi-solid coal-oil-based rock chip mixture obtained in the mixer 2 is conveyed to the automatic weighing feeder 6 for making coal shapes for extrusion and cutting, to obtain the finished mixed rock chip coal shape fuel after blending.

[0041] The obtained mixed rock chip briquette fuel is uniformly fed into the pulverizer 20 according to the weight blending ratio through the automatic weighing feeder 6.

[0042] In the pulverizer 20, water in the mixed fuel is removed by hot air and the fuel is ground into powder, thereby obtaining a powdered mixed fuel.

[0043] The obtained powdered mixed fuel is sent into the boiler through the pneumatic conveying system, so that the mixed fuel is burned at a high temperature in the combustion area of ​​1400℃ in the boiler. After the flue gas dust removal, denitrification, desulfurization and other purification treatments, the purpose of high-temperature complete combustion and clean disposal of oil-based rock chips is achieved.

[0044] The working principle of the utility model is:

[0045] The oil-based rock chips in the storage tank 1 are extracted from the storage tank 1 by a single screw pump 14 and sent to the mixer 2. The oil-based rock chips sent to the mixer 2 are mixed with the coal added by the single tube spiral scale 15. After the mixing is completed, a solid-like coal-oil-based rock chips mixture is obtained, and the coal-oil-based rock chips mixture is sent to the inlet of the hopper elevator 3. The hopper elevator 3 sends the mixture to the upper part of the cylindrical silo, and the mixture enters the cylindrical silo 4 for storage. According to the use requirements, the material is discharged from the hopper at the bottom of the cylindrical silo 4 and sent to the briquette machine 5 for briquetting. After the briquetting material comes out of the discharge port of the briquette machine 5, it is sent to the automatic weighing feeder 6 through a conveyor belt conveyor to be transported according to a certain weight, and finally sent to the pulverizer 20 to be ground into powder. The obtained powdered mixed fuel is sent to the pulverized coal boiler, so that the mixed fuel is burned at a high temperature in the combustion area of ​​the boiler at 1400°C.

[0046] When it is working normally and the weight of the mixture in the weighing hopper 13 has not reached the preset weight, turn on the power of the external motor, open the discharge port of the storage hopper 16, close the discharge port of the weighing hopper 13, and allow the mixture after being pressed by the briquette press 5 to fall from the storage hopper 16 into the weighing hopper 13; when the weight of the mixture in the weighing hopper 13 reaches the preset weight, close the discharge port of the storage hopper 16, open the discharge port of the weighing hopper 13, the storage hopper 16 stores the mixture after being pressed by the briquette press 5, and the mixture accumulated in the weighing hopper 13 falls onto the conveyor belt 12, so that the mixture of the preset weight enters the powder making machine 20.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A fuel processing system based on oil-based rock cuttings, characterized in that: It comprises a storage tank (1), a hopper elevator (3), a powder making machine (20), a cylindrical silo (4) and a mixer (2). The mixer (2) is provided with an oil-based rock cuttings inlet (18) and a coal inlet (19). The storage tank (1) stores oil-based rock cuttings. The storage tank (1) is connected to the oil-based rock cuttings inlet (18) of the mixer (2) through a pipeline. The discharge port of the mixer (2) is connected to the inlet port of the hopper elevator (3). The discharge port of the hopper elevator (3) is connected to the inlet port of the cylindrical silo (4). The discharge port of the cylindrical silo (4) is connected to a briquette machine (5). The discharge port of the briquette machine (5) is connected to an automatic weighing feeder (6). The discharge port of the automatic weighing feeder (6) is connected to a coal conveying belt. The coal conveying belt is connected to the inlet port of the powder making machine (20).

2. A fuel processing system based on oil-based rock cuttings according to claim 1, characterized in that: The automatic weighing feeder (6) comprises a weighing hopper (13), a storage hopper (16) and a body (7); a first rotating wheel (8) is rotatably mounted on one end of the body (7); a second rotating wheel (10) is rotatably mounted on the other end of the body (7); the diameter of the first rotating wheel (8) is larger than that of the second rotating wheel (10); a plurality of spring shock absorbers (9) of successively decreasing heights are fixedly mounted above the body (7); a roller (11) is rotatably mounted above the spring shock absorber (9); the two rotating wheels (8) and the plurality of rollers (11) are all drivingly connected to a conveyor belt (12); the first rotating wheel (8) is drivingly connected to a driving end of an external motor; the weighing hopper (13) is fixedly mounted above the body (7) via a frame; and the storage hopper (16) is fixedly mounted above the weighing hopper (13) via a frame.

3. The fuel processing system based on oil-based rock cuttings according to claim 1, characterized in that: A single screw pump (14) is installed in the pipeline between the storage tank (1) and the mixer (2).

4. The fuel processing system based on oil-based rock cuttings according to claim 1, characterized in that: A single-tube spiral scale (15) is installed in the coal inlet (19) of the mixer (2).

5. The fuel processing system based on oil-based rock cuttings according to claim 1, characterized in that: The capacity of the cylindrical silo (4) is 1-300t.

6. The fuel processing system based on oil-based rock cuttings according to claim 2, characterized in that: The conveying distance of the conveyor belt (12) is 1-10m.

7. The fuel processing system based on oil-based rock cuttings according to claim 1, characterized in that: The mixer (2) is a twin-shaft mixer.

8. The fuel processing system based on oil-based rock cuttings according to claim 1, characterized in that: The discharge port of the briquette press (5) is connected to the feed port of the storage hopper (16) via a conveyor belt.

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