CN111073716B - Production equipment and production method of pipe coal slurry - Google Patents
Production equipment and production method of pipe coal slurry Download PDFInfo
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- CN111073716B CN111073716B CN202010027026.0A CN202010027026A CN111073716B CN 111073716 B CN111073716 B CN 111073716B CN 202010027026 A CN202010027026 A CN 202010027026A CN 111073716 B CN111073716 B CN 111073716B
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
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Abstract
The invention discloses production equipment for pipe coal slurry delivery, which comprises a fine crusher, wherein a fine coal buffer bin is arranged below a discharge hole of the fine crusher, a quantitative feeder is arranged below the discharge hole of the fine coal buffer bin, a rod mill is connected to the discharge hole of the quantitative feeder through a first pipeline, a safety screen is arranged below the discharge hole of the rod mill, the safety screen is connected with a buffer slurry tank through a second pipeline, the buffer slurry tank is connected with an underflow pump through a third pipeline, the discharge hole of the underflow pump is connected with a storage tank through a fourth pipeline, the discharge hole of the storage tank is connected with a slurry feeding pump through a fifth pipeline, and the discharge hole of the slurry feeding pump is connected with a main pump through a sixth pipeline; the safety screen is connected with a pulp returning tank through a seventh pipeline, a discharge port of the pulp returning tank is connected with a pulp returning pump through an eighth pipeline, and the discharge port of the pulp returning pump is communicated with a feed port of the rod mill through a pulp returning pipe. The method for producing the pipe coal conveying slurry by using the equipment is also provided, and the pipe coal conveying slurry produced by using the method is suitable for long-distance transportation.
Description
Technical Field
The invention relates to the technical field of coal slurry preparation and conveying, in particular to production equipment for pipe coal slurry conveying, and further relates to a production method for pipe coal slurry conveying.
Background
At present, coal transportation mainly comprises railway, highway and waterway transportation, and has high transportation cost, high return air rate and great environmental pollution. The pipeline coal conveying can be used as an economic, environment-friendly and safe transportation mode.
The successful practice of the U.S. black Michaelis pipeline exists in the industrial operation of the coal slurry conveying pipeline in the world, and the pipeline conveys low-concentration coal slurry, and the weight concentration range is 43-48%; the high-concentration coal slurry conveying pipeline is built in 1986 by the combination of Soviet union and Italy, is blocked during test operation and is not operated all the time. This has very important reference meaning for pipeline transportation of coal slurry. The technology of the pipeline for conveying ore pulp in China is well-done, and the pipeline for conveying coal pulp is the first example in China. The coal slurry conveying scale of the Shenwei pipeline is 10Mt per year, and the conveying distance is 727km. How to ensure the large-scale long-distance safe transportation of the coal slurry in industrialization, and the preparation of the qualified concentration coal slurry is particularly critical.
Therefore, the field needs to develop a coal slurry preparation method suitable for long-distance large-scale transportation, strictly control the concentration of the coal slurry and ensure the safe transportation of the coal slurry in a pipeline.
Disclosure of Invention
The invention aims to provide production equipment for pipe coal slurry, and the prepared coal slurry is suitable for long-distance large-scale conveying.
The invention also aims to provide production equipment for pipe-conveyed coal slurry, and the prepared coal slurry is suitable for long-distance large-scale conveying and can ensure safe conveying of the coal slurry in a pipeline.
The invention adopts the technical scheme that the production equipment for the pipe coal slurry comprises a fine crusher, wherein a fine coal buffer bin is arranged below a discharge hole of the fine crusher, a quantitative feeder is arranged below the discharge hole of the fine coal buffer bin, a rod mill is connected to the discharge hole of the quantitative feeder through a first pipeline, a safety screen is arranged below the discharge hole of the rod mill, the safety screen is connected with a buffer slurry tank through a second pipeline, the buffer slurry tank is connected with an underflow pump through a third pipeline, the discharge hole of the underflow pump is connected with a storage tank through a fourth pipeline, the discharge hole of the storage tank is connected with a slurry feeding pump through a fifth pipeline, and the discharge hole of the slurry feeding pump is connected with a main pump through a sixth pipeline; the safety screen is connected with a pulp returning tank through a seventh pipeline, a discharge port of the pulp returning tank is connected with a pulp returning pump through an eighth pipeline, and the discharge port of the pulp returning pump is communicated with a feed port of the rod mill through a pulp returning pipe.
The present invention is also characterized in that,
the third pipeline is provided with a concentration meter.
A first process water inlet is formed in the first pipeline, and a slurry return water inlet is formed in the seventh pipeline; the fifth pipeline is provided with a secondary water inlet; the first process water inlet, the slurry return water inlet and the secondary water inlet are respectively connected with the water inlet pipe.
The waste pulp recycling device also comprises a waste pulp tank and a ninth pipeline, wherein the waste pulp tank is communicated with the fourth pipeline through the ninth pipeline.
The production method of the pipe coal slurry adopts another technical scheme that the production equipment of the pipe coal slurry is used, and the production method is implemented according to the following steps:
step 1: rod mill grinding pulping:
crushing coal raw materials into powder coal buffer bins with the diameter of less than 6mm through a fine crusher, quantitatively feeding the powder coal raw materials into a rod mill through a quantitative feeder, adding water into the rod mill through a first process water adding port, controlling the water adding amount through an electromagnetic flowmeter, fully grinding coal slurry through the rod mill, and conveying the coal slurry into a safety screen through a drum screen with the mesh size of 3mm on the rod mill; the oversize material of the drum screen is pulled away by a trolley through a slag discharging port;
step 2: the safety screen strictly controls the granularity of the coal slurry:
delivering the coal slurry prepared in the step 1 to a safety screen, controlling the granularity below 3mm, mixing oversize materials with granularity above 3mm and water added through a slurry return water inlet into a slurry return tank, returning the coal slurry in the slurry return tank to a rod mill through a slurry return pump, and carrying out mixed grinding with the initial materials again; undersize with granularity below 3mm is detected to be qualified by a concentration meter and then is pumped into a storage tank by an underflow pump;
step 3: the pumping process comprises the following steps:
judging whether water needs to be added through a secondary water adding port according to the weight concentration requirement of the subsequent process on the coal slurry: if the weight concentration of the coal slurry in the storage tank is greater than the weight concentration requirement of the subsequent process on the coal slurry, the weight concentration of the coal slurry is required to be adjusted by adding water through a secondary water adding port, and then the coal slurry is conveyed to a main pump through a slurry feeding pump for long-distance conveying.
The present invention is also characterized in that,
in the step 1, the raw material of the raw material is long flame coal or non-caking coal in bituminous coal.
In the step 1, the feeding amount of the quantitative feeder is 100-250 t/h based on dry base coal.
In the step 1, the water adding quantity of the water adding port of the first process is 90-210 m 3 /h。
In step 2, the qualification criteria are: the weight concentration of the coal slurry is 50% -55%; when the weight concentration of the coal slurry is lower than 50%, the unqualified coal slurry is directly pumped into a waste slurry tank through an underflow pump through a fourth pipeline and a ninth pipeline in sequence; the water adding quantity of the slurry return water adding port is 16-23 m 3 And/h, the slurry returning amount is 19-29 m 3 /h。
In the step 3, when water is needed to be added through the secondary water adding port, the water adding amount of the secondary water adding port is 1-45 m 3 /h。
The preparation method has the beneficial effects that the rod mill is adopted for grinding and pulping in the process, and the concentration of the coal slurry is strictly controlled by adding water into the first process water adding port and the second water adding port before the safety screen and the slurry feeding pump, so that the safety and the stability of the pipe coal slurry conveying are ensured. Solves the problem of large-scale long-distance transportation of coal slurry.
Drawings
FIG. 1 is a process flow diagram of a production facility for a coal slurry in pipe according to the present invention.
In the figure, 1. Fine crusher, 2. Fine coal surge bin, 3. Quantitative feeder, 4. Rod mill, 5. Safety screen, 6. Buffer tank, 7. Return tank, 8. Underflow pump, 9. Return pump, 10. Storage tank, 11. Feed pump, 12. Main pump, 13. Concentration meter, 14. Trolley, 15. First pipe, 16. Second pipe, 17. Third pipe, 18. Fourth pipe, 19. Fifth pipe, 20. Sixth pipe, 21. Seventh pipe, 22. Eighth pipe, 23. Return pipe, 24. First process water inlet, 25. Return water inlet, 26. Secondary water inlet, 27. Waste tank, 28. Ninth pipe.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The invention provides production equipment for pipe coal slurry delivery, which is shown in fig. 1 and comprises a fine crusher 1, wherein a fine coal buffer bin 2 is arranged below a discharge port of the fine crusher 1, a quantitative feeder 3 is arranged below a discharge port of the fine coal buffer bin 2, a rod mill 4 is connected to a discharge port of the quantitative feeder 3 through a first pipeline 15, a safety screen 5 is arranged below a discharge port of the rod mill 4, the safety screen 5 is connected with a buffer slurry tank 6 through a second pipeline 16, the buffer slurry tank 6 is connected with an underflow pump 8 through a third pipeline 17, a discharge port of the underflow pump 8 is connected with a storage tank 10 through a fourth pipeline 18, a discharge port of the storage tank 10 is connected with a slurry feeding pump 11 through a fifth pipeline 19, and a discharge port of the slurry feeding pump 11 is connected with a main pump 12 through a sixth pipeline 20; the safety screen 5 is connected with a pulp returning tank 7 through a seventh pipeline 21, a discharge port of the pulp returning tank 7 is connected with a pulp returning pump 9 through an eighth pipeline 22, and the discharge port of the pulp returning pump 9 is communicated with a feed port of the rod mill 4 through a pulp returning pipe 23.
The third pipe 17 is provided with a concentration meter 13.
A first process water inlet 24 is arranged on the first pipeline 15, and a slurry return water inlet 25 is arranged on the seventh pipeline 21; the fifth pipeline 19 is provided with a secondary water adding port 26; the first process water inlet 24, the slurry return water inlet 25 and the secondary water inlet 26 are respectively connected with a water inlet pipe.
And a waste pulp tank 27 and a ninth pipeline 28 are also included, and the waste pulp tank 27 is communicated with the fourth pipeline 18 through the ninth pipeline 28.
The invention also provides a production method of the pipe coal slurry, which is applied to the production equipment and is implemented according to the following steps:
step 1: rod mill 4 grinding pulping:
crushing a coal raw material into powder coal with the diameter of less than 6mm through a fine crusher 1, enabling the powder coal raw material to fall into a powder coal buffer bin 2, quantitatively feeding the powder coal into a rod mill 4 through a quantitative feeder 3, simultaneously adding water into the rod mill 4 through a first process water adding port 24, controlling the water adding amount through an electromagnetic flowmeter, fully grinding coal slurry through the rod mill 4, and conveying the coal slurry into a safety screen 5 through a drum screen with the mesh size of 3mm on the rod mill 4; the oversize material of the drum screen is pulled away by the trolley 14 through the slag discharging port;
in the step 1, the raw material of the raw material is long flame coal or non-caking coal in bituminous coal.
In step 1, the feeding amount of the quantitative feeder 3 is 100 to 250t/h based on dry coal.
In the step 1, the water adding amount of the water adding port 24 of the first process is 90-210 m 3 /h。
Step 2: the safety screen 5 strictly controls the granularity of the coal slurry:
delivering the coal slurry prepared in the step 1 to a safety screen 5, controlling the granularity below 3mm, mixing oversize products with granularity above 3mm and water added through a slurry return water inlet 25 into a slurry return tank 7, returning the coal slurry in the slurry return tank 7 to a rod mill 4 through a slurry return pump 9, and carrying out mixed grinding with the initial materials again; undersize with granularity below 3mm is detected to be qualified by a concentration meter 13 and then is sent into a storage tank 10 by an underflow pump 8;
in step 2, the qualification criteria are: the weight concentration of the coal slurry is 50% -55%; when the weight concentration of the coal slurry is lower than 50%, the unqualified coal slurry is directly pumped into a waste slurry tank 27 through an underflow pump 8 through a fourth pipeline 18 and a ninth pipeline 28 in sequence; the water adding quantity of the slurry return water adding port 25 is 16-23 m 3 And/h, the slurry returning amount is 19-29 m 3 /h；
Step 3: the pumping process comprises the following steps:
judging whether water needs to be added through the secondary water adding port 26 according to the weight concentration requirement of the subsequent process on the coal slurry: if the weight concentration of the coal slurry in the storage tank 10 is greater than the weight concentration requirement of the subsequent process on the coal slurry, the weight concentration of the coal slurry is required to be adjusted by adding water through the secondary water adding port 26, and then the coal slurry is sent to the main pump 12 through the slurry feeding pump 11 for long-distance conveying;
in the step 3, when water is required to be added through the secondary water adding port 26, the water adding amount of the secondary water adding port 26 is 1-45 m 3 /h。
The coal slurry prepared by the preparation method is directly conveyed to a terminal station for a long distance through a main pump.
Example 1
The production method of the pipe coal slurry is implemented according to the following steps:
step 1: rod mill 4 grinding pulping:
crushing a coal raw material into powder coal with the diameter of less than 6mm through a fine crusher 1, enabling the powder coal raw material to fall into a powder coal buffer bin 2, quantitatively feeding the powder coal into a rod mill 4 through a quantitative feeder 3, simultaneously adding water into the rod mill 4 through a first process water adding port 24, controlling the water adding amount through an electromagnetic flowmeter, fully grinding coal slurry through the rod mill 4, and conveying the coal slurry into a safety screen 5 through a drum screen with the mesh size of 3mm on the rod mill 4; the oversize material of the drum screen is pulled away by the trolley 14 through the slag discharging port;
in the step 1, the raw material of the raw coal is the medium-long flame coal of the bituminous coal.
In step 1, the feeding amount of the quantitative feeder 3 was 100t/h in terms of dry base coal.
In step 1, the water addition amount of the water adding port 24 of the first process is 90m 3 /h；
Step 2: the safety screen 5 strictly controls the granularity of the coal slurry:
delivering the coal slurry prepared in the step 1 to a safety screen 5, controlling the granularity below 3mm, mixing oversize products with granularity above 3mm and water added through a slurry return water inlet 25 into a slurry return tank 7, returning the coal slurry in the slurry return tank 7 to a rod mill 4 through a slurry return pump 9, and carrying out mixed grinding with the initial materials again; the undersize with granularity below 3mm is detected by a concentration meter 13 to have the weight concentration of coal slurry of 50 percent, and the coal slurry is sent into a storage tank 10 by an underflow pump 8 after being checked to be qualified;
in the step 2, the water adding quantity of the slurry return water adding port 25 is 23m 3 And/h, the slurry return amount is 29m 3 /h；
Step 3: the pumping process comprises the following steps:
50% meets the requirement of conveying concentration, and secondary water addition is not needed. Directly through the slurry feed pump 11 to the main pump 12 for long distance delivery to the terminal.
Example 2
The production method of the pipe coal slurry is implemented according to the following steps:
step 1: rod mill 4 grinding pulping:
crushing a coal raw material into powder coal with the diameter of less than 6mm through a fine crusher 1, enabling the powder coal raw material to fall into a powder coal buffer bin 2, quantitatively feeding the powder coal into a rod mill 4 through a quantitative feeder 3, simultaneously adding water into the rod mill 4 through a first process water adding port 24, controlling the water adding amount through an electromagnetic flowmeter, fully grinding coal slurry through the rod mill 4, and conveying the coal slurry into a safety screen 5 through a drum screen with the mesh size of 3mm on the rod mill 4; the oversize material of the drum screen is pulled away by the trolley 14 through the slag discharging port;
in the step 1, the raw material of the raw coal is non-caking coal.
In step 1, the amount of the feed of the quantitative feeder 3 was 150t/h in terms of dry base coal.
In step 1, the water addition amount of the water adding port 24 of the first process is 133m 3 /h；
Step 2: the safety screen 5 strictly controls the granularity of the coal slurry:
delivering the coal slurry prepared in the step 1 to a safety screen 5, controlling the granularity below 3mm, mixing oversize products with granularity above 3mm and water added through a slurry return water inlet 25 into a slurry return tank 7, returning the coal slurry in the slurry return tank 7 to a rod mill 4 through a slurry return pump 9, and carrying out mixed grinding with the initial materials again; the undersize with granularity below 3mm is detected by a concentration meter 13 to have the weight concentration of the coal slurry of 53.0 percent, and the coal slurry is sent into a storage tank 10 by an underflow pump 8 after being checked to be qualified;
in the step 2, the water adding quantity of the slurry return water adding port 25 is 16m 3 And/h, the slurry return amount is 19m 3 /h；
Step 3: the pumping process comprises the following steps:
53.0% meets the requirement of conveying concentration, and secondary water addition is not needed. Directly through the slurry feed pump 11 to the main pump 12 for long distance delivery to the terminal.
Example 3
The production method of the pipe coal slurry is implemented according to the following steps:
step 1: rod mill 4 grinding pulping:
crushing a coal raw material into powder coal with the diameter of less than 6mm through a fine crusher 1, enabling the powder coal raw material to fall into a powder coal buffer bin 2, quantitatively feeding the powder coal into a rod mill 4 through a quantitative feeder 3, simultaneously adding water into the rod mill 4 through a first process water adding port 24, controlling the water adding amount through an electromagnetic flowmeter, fully grinding coal slurry through the rod mill 4, and conveying the coal slurry into a safety screen 5 through a drum screen with the mesh size of 3mm on the rod mill 4; the oversize material of the drum screen is pulled away by the trolley 14 through the slag discharging port;
in the step 1, the raw material of the raw coal is non-caking coal.
In step 1, the feeding amount of the quantitative feeder 3 was 200t/h in terms of dry base coal.
In step 1, the water addition amount of the water adding port 24 of the first process is 170m 3 /h；
Step 2: the safety screen 5 strictly controls the granularity of the coal slurry:
delivering the coal slurry prepared in the step 1 to a safety screen 5, controlling the granularity below 3mm, mixing oversize products with granularity above 3mm and water added through a slurry return water inlet 25 into a slurry return tank 7, returning the coal slurry in the slurry return tank 7 to a rod mill 4 through a slurry return pump 9, and carrying out mixed grinding with the initial materials again; the undersize with granularity below 3mm is detected by a concentration meter 13 to have the weight concentration of the coal slurry of 54.0 percent, and the coal slurry is sent into a storage tank 10 by an underflow pump 8 after being checked to be qualified;
in the step 2, the water adding quantity of the slurry return water adding port 25 is 20m 3 And/h, the slurry return amount is 26m 3 /h；
Step 3: the pumping process comprises the following steps:
the transportation concentration of the pipe coal slurry is set to be 53.0%, the measured coal slurry concentration is 54.0% higher, secondary water adding is adopted, and the water adding amount is 17.8m 3 And (3) concentrating the mixture, and sending the concentrated mixture to a main pump 12 through a slurry feeding pump 11 for long-distance conveying to a terminal.
Example 4
Step 1: rod mill 4 grinding pulping:
crushing a coal raw material into powder coal with the diameter of less than 6mm through a fine crusher 1, enabling the powder coal raw material to fall into a powder coal buffer bin 2, quantitatively feeding the powder coal into a rod mill 4 through a quantitative feeder 3, simultaneously adding water into the rod mill 4 through a first process water adding port 24, controlling the water adding amount through an electromagnetic flowmeter, fully grinding coal slurry through the rod mill 4, and conveying the coal slurry into a safety screen 5 through a drum screen with the mesh size of 3mm on the rod mill 4; the oversize material of the drum screen is pulled away by the trolley 14 through the slag discharging port;
in the step 1, the raw material of the raw coal is non-caking coal.
In step 1, the amount of the feed of the quantitative feeder 3 was 250t/h in terms of dry base coal.
In step 1, the water addition amount of the water adding port 24 of the first process is 210m 3 /h；
Step 2: the safety screen 5 strictly controls the granularity of the coal slurry:
delivering the coal slurry prepared in the step 1 to a safety screen 5, controlling the granularity below 3mm, mixing oversize products with granularity above 3mm and water added through a slurry return water inlet 25 into a slurry return tank 7, returning the coal slurry in the slurry return tank 7 to a rod mill 4 through a slurry return pump 9, and carrying out mixed grinding with the initial materials again; the undersize with granularity below 3mm is detected by a concentration meter 13 to have the weight concentration of the coal slurry of 54.5 percent, and the coal slurry is sent into a storage tank 10 by an underflow pump 8 after being checked to be qualified;
in the step 2, the water adding quantity of the slurry return water adding port 25 is 18m 3 And/h, the slurry return amount is 24m 3 /h；
Step 3: the pumping process comprises the following steps:
the transportation concentration of the pipe coal slurry is set to be 52.5%, and the coal slurry is actually measuredThe concentration is 54.5 percent higher, the secondary water adding is adopted, and the water adding amount is 35.5m 3 And (3) concentrating the mixture, and sending the concentrated mixture to a main pump 12 through a slurry feeding pump 11 for long-distance conveying to a terminal.
Example 5
Step 1: rod mill 4 grinding pulping:
crushing a coal raw material into powder coal with the diameter of less than 6mm through a fine crusher 1, enabling the powder coal raw material to fall into a powder coal buffer bin 2, quantitatively feeding the powder coal into a rod mill 4 through a quantitative feeder 3, simultaneously adding water into the rod mill 4 through a first process water adding port 24, controlling the water adding amount through an electromagnetic flowmeter, fully grinding coal slurry through the rod mill 4, and conveying the coal slurry into a safety screen 5 through a drum screen with the mesh size of 3mm on the rod mill 4; the oversize material of the drum screen is pulled away by the trolley 14 through the slag discharging port;
in the step 1, the raw material of the raw coal is non-caking coal.
In step 1, the feeding amount of the quantitative feeder 3 was 180t/h in terms of dry base coal.
In step 1, the water addition amount of the water adding port 24 of the first process is 147m 3 /h；
Step 2: the safety screen 5 strictly controls the granularity of the coal slurry:
delivering the coal slurry prepared in the step 1 to a safety screen 5, controlling the granularity below 3mm, mixing oversize products with granularity above 3mm and water added through a slurry return water inlet 25 into a slurry return tank 7, returning the coal slurry in the slurry return tank 7 to a rod mill 4 through a slurry return pump 9, and carrying out mixed grinding with the initial materials again; the undersize with granularity below 3mm is detected by a concentration meter 13 to have the weight concentration of the coal slurry of 55.0 percent, and the coal slurry is sent into a storage tank 10 by an underflow pump 8 after being checked to be qualified;
in the step 2, the water adding quantity of the slurry return water adding port 25 is 20m 3 And/h, the slurry return amount is 23m 3 /h；
Step 3: the pumping process comprises the following steps:
the transportation concentration of the pipe coal slurry is set to be 53.0%, the measured coal slurry concentration is 55.0% higher, secondary water adding is adopted, and the water adding amount is 35.5m 3 And (3) concentrating the mixture, and sending the concentrated mixture to a main pump 12 through a slurry feeding pump 11 for long-distance conveying to a terminal.
Example 6
Step 1: rod mill 4 grinding pulping:
crushing a coal raw material into powder coal with the diameter of less than 6mm through a fine crusher 1, enabling the powder coal raw material to fall into a powder coal buffer bin 2, quantitatively feeding the powder coal into a rod mill 4 through a quantitative feeder 3, simultaneously adding water into the rod mill 4 through a first process water adding port 24, controlling the water adding amount through an electromagnetic flowmeter, fully grinding coal slurry through the rod mill 4, and conveying the coal slurry into a safety screen 5 through a drum screen with the mesh size of 3mm on the rod mill 4; the oversize material of the drum screen is pulled away by the trolley 14 through the slag discharging port;
in the step 1, the raw material of the raw coal is non-caking coal.
In step 1, the amount of the feed of the quantitative feeder 3 was 160t/h in terms of dry base coal.
In step 1, the water adding amount of the water adding port 24 of the first process is 131m 3 /h；
Step 2: the safety screen 5 strictly controls the granularity of the coal slurry:
delivering the coal slurry prepared in the step 1 to a safety screen 5, controlling the granularity below 3mm, mixing oversize products with granularity above 3mm and water added through a slurry return water inlet 25 into a slurry return tank 7, returning the coal slurry in the slurry return tank 7 to a rod mill 4 through a slurry return pump 9, and carrying out mixed grinding with the initial materials again; the undersize with granularity below 3mm is detected by a concentration meter 13 to have the weight concentration of the coal slurry of 55.0 percent, and the coal slurry is sent into a storage tank 10 by an underflow pump 8 after being checked to be qualified;
in the step 2, the water adding quantity of the slurry return water adding port 25 is 23m 3 And/h, the slurry return amount is 29m 3 /h；
Step 3: the pumping process comprises the following steps:
the transportation concentration of the pipe coal slurry is set to be 52.5%, the measured coal slurry concentration is 55.0% higher, the secondary water adding is adopted, and the water adding amount is 44m 3 And (3) concentrating the mixture, and sending the concentrated mixture to a main pump 12 through a slurry feeding pump 11 for long-distance conveying to a terminal.
Claims (2)
1. The production method of the pipe coal slurry comprises the steps of finely crushing the coal slurry, wherein a fine coal buffer bin (2) is arranged below a discharge port of the finely crushing the coal slurry (1), a quantitative feeder (3) is arranged below the discharge port of the fine coal buffer bin (2), a rod mill (4) is connected to the discharge port of the quantitative feeder (3) through a first pipeline (15), a safety screen (5) is arranged below the discharge port of the rod mill (4), a buffer slurry tank (6) is connected to the safety screen (5) through a second pipeline (16), an underflow pump (8) is connected to the buffer slurry tank (6) through a third pipeline (17), a storage tank (10) is connected to the discharge port of the buffer slurry pump (8) through a fourth pipeline (18), a slurry pump (11) is connected to the discharge port of the storage tank (10) through a fifth pipeline (19), and a main pump (12) is connected to the discharge port of the slurry pump (11) through a sixth pipeline (20); the safety screen (5) is connected with a pulp returning tank (7) through a seventh pipeline (21), a discharge port of the pulp returning tank (7) is connected with a pulp returning pump (9) through an eighth pipeline (22), and the discharge port of the pulp returning pump (9) is communicated with a feed port of the rod mill (4) through a pulp returning pipe (23);
a concentration meter (13) is arranged on the third pipeline (17);
a first process water inlet (24) is formed in the first pipeline (15), and a slurry return water inlet (25) is formed in the seventh pipeline (21); a secondary water adding port (26) is arranged on the fifth pipeline (19); the first process water inlet (24), the slurry return water inlet (25) and the secondary water inlet (26) are respectively connected with the water inlet pipe;
the device also comprises a waste pulp tank (27) and a ninth pipeline (28), wherein the waste pulp tank (27) is communicated with the fourth pipeline (18) through the ninth pipeline (28);
the production method of the pipe coal slurry is characterized by comprising the following steps of:
step 1: grinding and pulping by a rod mill (4):
crushing coal raw materials into 6mm by a fine crusher (1), dropping the crushed coal raw materials into a fine coal buffer bin (2), quantitatively feeding the crushed coal raw materials into a rod mill (4) by a quantitative feeder (3), simultaneously adding water into the rod mill (4) by a first process water adding port (24), controlling the water adding amount by an electromagnetic flowmeter, fully grinding coal slurry by the rod mill (4), and conveying the coal slurry into a safety screen (5) by a roller screen with a mesh size of 3mm on the rod mill (4); the oversize material of the drum screen is pulled away by a trolley (14) through a slag discharging port;
in the step 1, the feeding amount of the quantitative feeder (3) is 100-250 t/h calculated by dry coal;
in the step 1, the water adding amount of the water adding port (24) of the first process is 90-210 m 3 /h；
Step 2: the safety screen (5) strictly controls the granularity of the coal slurry:
delivering the coal slurry prepared in the step 1 to a safety screen (5), controlling the granularity to be below 3mm, mixing oversize products with granularity of more than 3mm and water added through a slurry return water inlet (25) into a slurry return tank (7), returning the coal slurry in the slurry return tank (7) to a rod mill (4) through a slurry return pump (9), and carrying out mixed grinding with the initial materials again; undersize with granularity below 3mm is sent into a storage tank (10) by an underflow pump (8) after being detected to be qualified by a concentration meter (13);
in step 2, the qualification criteria are: the weight concentration of the coal slurry is 50% -55%; when the weight concentration of the coal slurry is lower than 50%, the unqualified coal slurry is directly pumped into a waste slurry tank (27) through an underflow pump (8) sequentially through a fourth pipeline (18) and a ninth pipeline (28); the water adding quantity of the slurry return water adding port (25) is 16-23 m 3 And/h, the slurry return amount is 19-29 m 3 /h；
Step 3: the pumping process comprises the following steps:
judging whether water needs to be added through a secondary water adding port (26) according to the weight concentration requirement of the subsequent process on the coal slurry: if the weight concentration of the coal slurry in the storage tank (10) is greater than the weight concentration requirement of the subsequent process on the coal slurry, the weight concentration of the coal slurry is required to be adjusted by adding water through the secondary water adding port (26), and then the coal slurry is sent to the main pump (12) through the slurry feeding pump (11) for long-distance conveying;
in the step 3, when water is required to be added through the secondary water adding port (26), the water adding amount of the secondary water adding port (26) is 1-45 m 3 /h。
2. The method for producing a coal slurry for pipe transportation according to claim 1, wherein in step 1, the raw material for coal is long-flame coal or non-caking coal in bituminous coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027026.0A CN111073716B (en) | 2020-01-10 | 2020-01-10 | Production equipment and production method of pipe coal slurry |
Applications Claiming Priority (1)
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| CN114015478B (en) * | 2021-11-17 | 2022-07-05 | 西安元创化工科技股份有限公司 | Coal slurry concentration and granularity control system and method in synthetic gas production process |
| CN115854261B (en) * | 2022-12-20 | 2023-07-04 | 中煤科工集团武汉设计研究院有限公司 | System and method for controlling and detecting quality of coal slurry conveyed by pipe with gradient adjusting function |
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| CN202865191U (en) * | 2012-10-18 | 2013-04-10 | 中煤科工集团武汉设计研究院 | System device for preparing water coal slurry by conveyed coal of long-distance pipeline |
| CN202898373U (en) * | 2012-10-18 | 2013-04-24 | 中煤科工集团武汉设计研究院 | Distributed coal slurry preparation system for long-distance pipeline coal transporting |
| CN209128384U (en) * | 2018-09-07 | 2019-07-19 | 煤科院节能技术有限公司 | A kind of preparation system being interrupted grain size distribution high-concentration coal-water slurry |
| CN211871890U (en) * | 2020-01-10 | 2020-11-06 | 陕西神渭煤炭管道运输有限责任公司 | Production equipment for coal slurry conveyed by pipe |
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| CN202865191U (en) * | 2012-10-18 | 2013-04-10 | 中煤科工集团武汉设计研究院 | System device for preparing water coal slurry by conveyed coal of long-distance pipeline |
| CN202898373U (en) * | 2012-10-18 | 2013-04-24 | 中煤科工集团武汉设计研究院 | Distributed coal slurry preparation system for long-distance pipeline coal transporting |
| CN209128384U (en) * | 2018-09-07 | 2019-07-19 | 煤科院节能技术有限公司 | A kind of preparation system being interrupted grain size distribution high-concentration coal-water slurry |
| CN211871890U (en) * | 2020-01-10 | 2020-11-06 | 陕西神渭煤炭管道运输有限责任公司 | Production equipment for coal slurry conveyed by pipe |
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