A smart fuel wet coal preparation system for lignite units

Abstract

The present invention discloses a lignite unit intelligent fuel wet coal preparation system, and relates to the technical field of wet coal preparation. The present invention comprises a bracket; a jigging assembly, which is fixed on the bracket; an air intake device, which is fixed on one side of the jigging assembly, and its output end is connected with three air valve devices, and the three air valve devices are all sealed and arranged on the upper end surface of the jigging assembly; a discharge port, which is opened on the lower end surface of the jigging assembly; a sieve plate assembly, which is configured into three, which can be slidably arranged in the jigging assembly, and correspond one to one with the three air valve devices; in the present invention, by arranging isolation cotton between the outer bin body and the inner bin body, the vibration influence of the whole device during water flow pulsation can be effectively avoided, and the sound during water flow pulsation can be reduced, and the lignite can be sorted multiple times through the three jigging chambers, thereby improving the accuracy of coal preparation.

Description

Technical Field

[0001] The invention relates to the technical field of wet coal preparation, and in particular to an intelligent fuel wet coal preparation system for a lignite unit. Background Art

[0002] As a low-quality coal, lignite has high moisture content and low calorific value, and is traditionally considered to be uneconomical for power generation. However, through the technological innovation of lignite units, lignite can be used efficiently. After lignite is mined, it needs to be sorted. The basic principle is to separate the components of the raw coal (clean coal, medium coal, gangue, pyrite) according to their different physical and chemical properties. These physical and chemical properties are mainly density, hydrophilicity, hydrophobicity, color, hardness, shape, electromagnetic properties, friction coefficient, elasticity, etc. When the sorting medium used in coal sorting is a fluid, it is called wet coal sorting.

[0003] Most of the existing wet coal preparation uses air pulsation jigs for selection, but the current jig screen plate is fixed, and compressed air is alternately blown in and out through the air valve, that is, a corresponding pulsating water flow is formed in the jig chamber, and it is difficult to control the rising and falling water flow rates, resulting in incomplete stratification of the raw coal, and it is easy to cause blockage of the screen plate holes, affecting the pulsation of the water flow.

[0004] In view of the above problems, the present invention provides a lignite unit intelligent fuel wet coal preparation system to solve the above problems. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: a lignite unit intelligent fuel wet coal preparation system, comprising:

[0006] Bracket;

[0007] A jigging assembly is fixed on the bracket;

[0008] An air intake device is fixed on one side of the jigging assembly, and an output end thereof is connected to three air valve devices, and the three air valve devices are all sealed and arranged on the upper end surface of the jigging assembly;

[0009] A discharge port is provided on the lower end surface of the jigging assembly;

[0010] The sieve plate assembly is configured as three, each of which is slidably disposed in the jigging assembly and corresponds one to one with the three air valve devices;

[0011] Wherein, the jigging assembly includes an outer warehouse body and an inner warehouse body, the inner warehouse body is fixed in the outer warehouse body, two isolation plates and one partition plate are fixed in the inner warehouse body, the two isolation plates and one partition plate divide the inner warehouse body into three jigging chambers and an air chamber, and the air chamber is connected to the air valve device.

[0012] Further, preferably, isolation cotton is arranged between the outer warehouse body and the inner warehouse body, and a discharge port is opened on one side of the outer warehouse body and the inner warehouse body, the discharge port is used to discharge high-density products, and the discharge port is used to discharge low-density products.

[0013] Further, preferably, the sieve plate assembly comprises:

[0014] The screen plate has two ends slidably arranged in the jigging chamber by means of sliding blocks;

[0015] The limiting rings are configured in four pieces and are symmetrically fixed at the four corners of the bottom plate of the sieve plate;

[0016] The rotating column is configured as two and is rotatably disposed in the two limiting rings respectively;

[0017] A resistance plate, fixed on the rotating column;

[0018] The sieve holes are configured as a plurality of arrays opened on the sieve plate;

[0019] The dispersion components are configured in multiple numbers and arranged on the upper end surface of the sieve plate along the X-axis direction.

[0020] Further, preferably, the limiting ring is provided with a threaded hole along the radial direction, a limiting bolt is threadedly connected in the threaded hole, and one end of the limiting bolt is in contact with the rotating column.

[0021] Further, preferably, the angles between the resistance plates and the sieve plates in the three sieve plate assemblies decrease successively.

[0022] Further, preferably, the dispersed component comprises:

[0023] The fixed bins are configured as two and symmetrically fixed on the sieve plate;

[0024] A wire take-up column, rotatably disposed in the fixed bin;

[0025] An adjusting column, which is threadedly connected in the fixing bin and arranged coaxially with the wire taking-up column, and a torsion spring is arranged between the adjusting column and the wire taking-up column;

[0026] A stretching line, both ends of which are fixed on the two take-up posts respectively;

[0027] The dispersion balls are configured in multiple numbers and fixed on the stretching line at equal intervals, and correspond one to one with the multiple sieve holes.

[0028] Further, preferably, an adjustment slot is provided on the adjustment column, the stretch line is an elastic line, and when the adjustment column is adjusted, the two adjustment columns are adjusted synchronously.

[0029] Compared with the prior art, the present invention provides a smart fuel wet coal preparation system for lignite units, which has the following beneficial effects:

[0030] In the present invention, by arranging isolation cotton between the outer bin body and the inner bin body, the vibration influence of the whole device during water flow pulsation can be effectively avoided, and the sound during water flow pulsation can be reduced. The raw coal can be sorted multiple times through the three jigging chambers, thereby improving the accuracy of coal selection, and the water flow rate in the three jigging chambers is gradually reduced, thereby improving the coal selection efficiency while selecting the coal, and when jigging coal selection, the flow rate of the rising water flow can be increased by the sliding of the screen plate assembly, thereby making the stratification of the raw coal more significant, and the raw coal can also be broken up by the dispersion assembly during the rising water flow to avoid the raw coal from sticking and being difficult to stratify, and the water flow rate can be reduced by the screen plate during the descending water flow, thereby increasing the time for the raw coal to descend by gravity, making it convenient for high-density products to descend to the bottom layer and completing the coal selection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of a smart fuel wet coal preparation system for a lignite unit.

[0032] Figure 2 This is a schematic diagram of the structure of the jigging component in a smart fuel wet coal preparation system for a lignite unit.

[0033] Figure 3 This is a schematic diagram of the structure of a sieve plate assembly in a smart fuel wet coal preparation system for a lignite unit.

[0034] Figure 4 This is a schematic diagram of the structure of the dispersed components in a smart fuel wet coal preparation system for a lignite unit.

[0035] Figure 5 This is a schematic diagram of the air intake status of the air valve equipment in a smart fuel wet coal preparation system of a lignite unit.

[0036] Figure 6 This is a schematic diagram of the water flow state in the jigging component of a lignite unit's intelligent fuel wet coal preparation system.

[0037] In the figure: 1. bracket; 2. jigging assembly; 3. air intake equipment; 4. air valve equipment; 5. discharge port; 6. sieve plate assembly; 21. outer bin; 22. inner bin; 23. isolation plate; 24. air chamber; 25. partition plate; 26. discharge port; 61. sieve plate; 62. sliding block; 63. limiting ring; 64. rotating column; 65. resistance plate; 66. sieve hole; 67. dispersion assembly; 671. fixed bin; 672. take-up column; 673. adjusting column; 674. adjusting slot; 675. stretching line; 676. dispersion ball. DETAILED DESCRIPTION

[0038] Reference Figure 1-Figure 6 The present invention provides a technical solution: a lignite unit intelligent fuel wet coal preparation system, comprising:

[0039] Bracket 1;

[0040] A jigging assembly 2 is fixed on the bracket 1;

[0041] An air intake device 3 is fixed on one side of the jigging assembly 2, and its output end is connected to three air valve devices 4, and the three air valve devices 4 are all sealed and arranged on the upper end surface of the jigging assembly 2;

[0042] A discharge port 5 is provided on the lower end surface of the jigging assembly 2;

[0043] The sieve plate assembly 6 is configured as three, each of which is slidably disposed in the jigging assembly 2 and corresponds one to one with the three air valve devices 4;

[0044] The jigging assembly 2 includes an outer warehouse body 21 and an inner warehouse body 22, wherein the inner warehouse body 22 is fixed inside the outer warehouse body 21, and two isolation plates 23 and a partition plate 25 are fixed inside the inner warehouse body 22, and the two isolation plates 23 and one partition plate 25 divide the inner warehouse body 22 into three jigging chambers and three air chambers 24, and the air chambers 24 are connected to the air valve device 4.

[0045] That is to say, the raw coal can be sorted multiple times through the three jigging chambers, thereby improving the accuracy of coal selection, and the water flow rate in the three jigging chambers is gradually reduced, thereby improving the coal selection efficiency while selecting the coal. It should be noted that when the raw coal enters the first jigging chamber, its total amount is large, and the rising water flow rate required is fast, so that the raw coal can rise with the water flow to complete the preliminary coal selection, and then the total amount of raw coal entering the next jigging chamber is reduced. Therefore, the water flow rate in the three jigging chambers is gradually reduced, thereby improving the coal selection efficiency.

[0046] In this embodiment, isolation cotton is arranged between the outer warehouse body 21 and the inner warehouse body 22, and a discharge port 26 is opened on one side of the outer warehouse body 21 and the inner warehouse body 22. The discharge port 5 is used to discharge high-density products, and the discharge port 26 is used to discharge low-density products.

[0047] Among them, by setting isolation cotton between the outer chamber body 21 and the inner chamber body 22, the vibration influence on the whole device caused by the pulsation of water flow can be effectively avoided, the sound caused by the pulsation of water flow can be reduced, and the comfort of the working environment can be improved.

[0048] It should be noted that the water flows in the three jigging chambers rise and fall in an alternating manner, so that the raw coal can be stratified before falling into the adjacent jigging chamber, thereby improving the coal preparation efficiency. That is to say, the raw coal enters the next jigging chamber when an upward water flow is generated in the jigging chamber. At this time, the next jigging chamber has a downward water flow, and the raw coal can be directly stratified when it falls in.

[0049] In this embodiment, the sieve plate assembly 6 comprises:

[0050] The screen plate 61 has two ends slidably arranged in the jigging chamber by means of sliding blocks 62;

[0051] The limiting rings 63 are configured in four numbers and are symmetrically fixed at the four corners of the bottom plate of the sieve plate 61;

[0052] The rotating pillars 64 are configured as two and are rotatably disposed in the two limiting rings 63 respectively;

[0053] A resistance plate 65, fixed on the rotating column 64;

[0054] The sieve holes 66 are configured as a plurality of sieve holes, and an array is opened on the sieve plate 61;

[0055] The dispersion components 67 are configured in plurality and arranged on the upper end surface of the sieve plate 61 along the X-axis direction.

[0056] As a preferred embodiment, the limiting ring 63 is provided with a threaded hole along the radial direction, and a limiting bolt is threadedly connected in the threaded hole, and one end of the limiting bolt is in contact with the rotating column 64 .

[0057] As a preferred embodiment, the angles between the resistance plates 65 and the sieve plates 61 in the three sieve plate assemblies 6 decrease successively.

[0058] It should be noted that, by successively reducing the angle of the resistance plate 65, the resistance of the resistance plate 65 to the water flow can be adjusted, thereby adjusting the thrust of the water flow on the sieve plate 61, and further adjusting the flow rate of the water flow above the sieve plate 61. That is to say, the greater the resistance of the resistance plate 65 to the water flow, the greater the force it pushes on the sieve plate 61, thereby increasing the water flow speed and dispersing the raw coal. When the sieve plate 61 falls, the resistance of the resistance plate 65 will reduce the falling speed, thereby reducing the speed of the descending water flow, extending the descending period of the raw coal, and facilitating the stratification of the raw coal by density.

[0059] As a preferred embodiment, the dispersion assembly 67 includes:

[0060] The fixed bins 671 are configured as two and symmetrically fixed on the sieve plate 61;

[0061] A wire take-up column 672 is rotatably disposed in the fixed bin 671;

[0062] The adjusting column 673 is threadedly connected in the fixing chamber 671 and is coaxially arranged with the wire taking-up column 672, and a torsion spring is arranged between the adjusting column 673 and the wire taking-up column 672;

[0063] The two ends of the stretching wire 675 are respectively fixed on the two wire-collecting posts 672;

[0064] The dispersion balls 676 are configured in plurality and fixed on the stretching wire 675 at equal intervals and correspond one to one with the plurality of sieve holes 66 .

[0065] It should be noted that the density of the dispersion ball 676 is lower than the density of the raw coal. It fits the sieve hole 66 through the stretching line 675 and the take-up column 672, and can impact the raw coal during the rising water flow, thereby improving the dispersion of the raw coal and facilitating stratification. Then, the dispersion ball 676 descends with the descending water flow through the stretching line 675 and the take-up column 672. At this time, the high-density product in the raw coal is located between the dispersion ball 676 and the sieve hole 66, and then is discharged through the downward pressure of the dispersion ball 676, avoiding the blockage of the sieve hole 66.

[0066] As a preferred embodiment, an adjustment slot 674 is provided on the adjustment column 673, the stretch line 675 is an elastic line, and when the adjustment column 673 is adjusted, the two adjustment columns 673 are adjusted synchronously.

[0067] Specifically, first, the raw coal is placed into the first jigging chamber through the feeding equipment, and then the raw coal can be sorted multiple times through the three jigging chambers, thereby improving the accuracy of coal selection, and the water flow rate in the three jigging chambers is gradually reduced, thereby improving the coal selection efficiency while selecting the coal, and when jigging coal selection, the flow rate of the rising water flow can be increased by the sliding of the screen plate assembly 6, so that the stratification of the raw coal is more obvious, and the rising water flow can also be used. The dispersion component 67 breaks up the raw coal to prevent the raw coal from sticking and being difficult to stratify. The water flow rate can be reduced by the screen plate 61 during the descending water flow, thereby increasing the time for the raw coal to descend by gravity, making it easier for high-density products to descend to the bottom layer and completing the coal selection operation.

[0068] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A smart fuel wet coal preparation system for lignite units, characterized in that: include: Bracket (1); A jigging assembly (2) is fixed on the bracket (1); An air intake device (3) is fixed on one side of the jigging assembly (2), and its output end is connected to three air valve devices (4), and the three air valve devices (4) are all sealed and arranged on the upper end surface of the jigging assembly (2); A discharge port (5) is provided on the lower end surface of the jigging assembly (2); The sieve plate assembly (6) is configured as three, each of which is slidably arranged in the jigging assembly (2) and corresponds one to one with the three air valve devices (4); The screen plate assembly (6) comprises a screen plate (61), both ends of which are slidably arranged in the jigging chamber by means of sliding blocks (62); The limiting rings (63) are configured in four numbers and are symmetrically fixed at the four corners of the bottom plate of the sieve plate (61); The rotating posts (64) are configured in two pieces and are respectively rotatably disposed in the two limiting rings (63); A resistance plate (65) is fixed on the rotating column (64); The sieve holes (66) are configured as a plurality of sieve holes and are arranged in an array on the sieve plate (61); A plurality of dispersion components (67) are arranged on the upper end surface of the sieve plate (61) at intervals along the X-axis direction; The dispersion assembly (67) includes a fixed bin (671), wherein the fixed bin (671) is configured as two and symmetrically fixed on the sieve plate (61); A wire take-up column (672) is rotatably disposed in the fixed bin (671); The adjusting column (673) is threadedly connected in the fixing chamber (671) and is coaxially arranged with the wire taking-up column (672), and a torsion spring is arranged between the adjusting column (673) and the wire taking-up column (672); A stretching line (675), both ends of which are fixed on two take-up posts (672); The dispersion balls (676) are configured in a plurality and fixed on the stretching wire (675) at equal intervals and correspond one to one with the plurality of sieve holes (66); The jigging assembly (2) comprises an outer bin body (21) and an inner bin body (22); the inner bin body (22) is fixed inside the outer bin body (21); two isolation plates (23) and a partition plate (25) are fixed inside the inner bin body (22); the two isolation plates (23) and the partition plate (25) divide the inner bin body (22) into three jigging chambers and three air chambers (24); the air chambers (24) are connected to the air valve device (4).

2. According to claim 1, a lignite unit intelligent fuel wet coal preparation system is characterized in that: Isolation cotton is provided between the outer bin body (21) and the inner bin body (22), and discharge ports (26) are provided on one side of the outer bin body (21) and the inner bin body (22). The discharge port (5) is used to discharge high-density products, and the discharge port (26) is used to discharge low-density products.

3. The intelligent fuel wet coal preparation system for lignite units according to claim 1 is characterized in that: The limiting ring (63) is provided with a threaded hole in the radial direction, a limiting bolt is threadedly connected in the threaded hole, and one end of the limiting bolt is in contact with the rotating column (64).

4. The intelligent fuel wet coal preparation system for lignite units according to claim 1 is characterized in that: The angles between the resistance plates (65) and the screen plates (61) in the three screen plate assemblies (6) decrease successively.

5. The intelligent fuel wet coal preparation system for lignite units according to claim 1 is characterized in that: An adjustment slot (674) is provided on the adjustment column (673), the stretch line (675) is an elastic line, and when the adjustment column (673) is adjusted, the two adjustment columns (673) are adjusted synchronously.

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