Clean coal impurity removal system

Abstract

The utility model relates to the technical field of clean coal impurity removal, in particular to a clean coal impurity removal system, shallow slot separation equipment and dehydration equipment are adjacently connected together through an impurity removal equipment and dehydration equipment interface, clean coal containing impurities is subjected to impurity removal after entering the shallow slot separation equipment, impurities are discharged through an impurity dehydration screen, and the clean coal is discharged after entering the dehydration equipment to be dehydrated. The clean coal impurity removal system has the beneficial effects that the novel clean coal impurity removal system is provided by aiming at reducing the sorting workload of light impurities in clean coal, improving the sorting working efficiency and ensuring the quality of the clean coal, and an original impurity-containing clean coal light impurity removal method taking manual sorting as a main mode can be changed; the method has very important practical value and practical significance for realizing high-efficiency and high-quality clean coal impurity removal for coal mine enterprises and guaranteeing the clean coal quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clean coal impurity removal, and particularly relates to a clean coal impurity removal system. BACKGROUND

[0002] After being mined underground, raw coal is transported to a coal preparation plant, sorted through a series of processes, and then sold as a commodity after clean coal is obtained. Due to the limitations and influences of the underground operation environment, the raw coal mined contains a large amount of impurities in addition to coal particles. Heavy impurities such as coal gangue and metals with a higher density than coal can be removed through washing and sorting processes and iron removers. However, in addition to the above heavy impurities, the coal also contains light impurities such as wooden sticks, wood chips, scarves, plastics, foams, and fibers. Currently, the light impurities are mainly removed by manual sorting.

[0003] Therefore, the present application designs a new clean coal impurity removal method and system. The method uses a shallow tank impurity removal device, uses clean water as the impurity removal medium, and uses the buoyancy of water to screen the light impurities such as wooden sticks, wood chips, scarves, plastics, foams, and fibers from the coal particles. The screened coal particles are dehydrated by a dehydration device to obtain clean coal with the light impurities removed. The method can change the traditional manual sorting mode of light impurities, greatly reduce the work difficulty and workload, improve the work efficiency, better guarantee the quality of clean coal, and has very important practical significance. SUMMARY

[0004] The present application provides a clean coal impurity removal system to make up for the deficiencies in the prior art.

[0005] A clean coal impurity removal system includes a shallow tank sorting device and a dehydration device, characterized in that:

[0006] The shallow tank sorting device and the dehydration device are connected together through an impurity removal device and a dehydration device interface. The impure clean coal enters the shallow tank sorting device for impurity removal. The impurities are discharged through an impurity dehydration screen. The clean coal is dehydrated in the dehydration device and then discharged.

[0007] Further, to better implement the present application, the shallow tank sorting device includes a tank body, a circulating rotating scraper chain is arranged in the tank body, a bottom water inlet is arranged below the tank body, a top water inlet is arranged on one side of the tank body, an impure clean coal inlet is arranged on the top of the tank body, an overflow port is arranged on one side of the top of the tank body, an impurity removal scraper is arranged at the overflow port, and the overflow port is connected to the impurity dehydration screen.

[0008] Further, to better implement the present application, the impurity dehydration screen is provided with an impurity outlet, and the height of the impurity outlet is lower than the height of the overflow port.

[0009] Further, in order to better realize the present application, the impurity removing scraper comprises a bearing seat mounted on the overflow port side wall, the rotating shaft is mounted in the bearing seat through a bearing, one end of the rotating shaft is driven to rotate through a driving wheel, and the rotating shaft is provided with a scraper blade with flexible scraper teeth.

[0010] Further, in order to better realize the present application, the impurity removing scraper comprises a bearing seat mounted on the overflow port side wall, the rotating shaft is mounted in the bearing seat through a bearing, one end of the rotating shaft is driven to rotate through a driving wheel, and the rotating shaft is provided with a scraper blade with flexible scraper teeth.

[0011] The present application has the beneficial effects that:

[0012] The present application reduces the sorting workload of light impurities in clean coal, improves the sorting work efficiency, and ensures the quality of clean coal. A new clean coal impurity removing system is proposed, which can change the previous manual sorting mode for light impurity removing of impure clean coal, realize efficient and high-quality clean coal impurity removing for coal mining enterprises, and has very important practical value and practical significance for ensuring the quality of clean coal. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a front view of the present application;

[0014] Figure 2 is a side view of the present application;

[0015] Figure 3 is a top view of the present application;

[0016] Figure 4 is a structure schematic view of the impurity removing scraper of the present application;

[0017] Figure 5 is a clean coal impurity removing flow chart of the present application.

[0018] In the drawings,

[0019] 1, shallow groove sorting equipment, 2, dehydration equipment, 3, impurity dehydration screen, 4, impurity removing scraper, 5, impure clean coal inlet, 101, groove body, 102, scraper chain, 103, bottom water inlet, 104, top water inlet, 1011, overflow port, 201, clean coal outlet, 202, interface of impurity removing equipment and dehydration equipment, 301, impurity outlet, 401, rotating shaft, 402, bearing seat, 403, bearing, 404, driving wheel, 405, overflow port side wall, 406, scraper blade, 407, flexible scraper teeth. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0022] Figures 1-5 For a specific embodiment of the present application, the embodiment is a clean coal impurity removal system. Light impurities such as wooden sticks, wood chips, veils, plastics, foams, and fibers in the impure clean coal are screened from the clean coal particles by using a shallow tank sorting device with water as a medium. Then, the impurity-removed clean coal is dehydrated by a dehydration device to obtain impurity-removed clean coal without wood chips, plastics, and other light impurities. The screened light impurities are enriched after being dehydrated in a debris dehydration screen. The shallow tank sorting device includes an impure clean coal inlet, a tank body, a scraper chain, a bottom water inlet, a top water inlet, a debris scraping plate, an overflow port, and a power system.

[0023] The specific impurity removal method is as follows:

[0024] (1) The impure clean coal containing light impurities such as wooden sticks, wood chips, veils, plastics, foams, and fibers enters the shallow tank impurity removal device from the impure clean coal inlet.

[0025] (2) The tank body of the shallow tank impurity removal device is filled with clean water. The impure clean coal entering the impurity removal device is subjected to the buoyant force of water. The clean coal particles sink to the bottom of the tank body due to the gravity effect, while the light impurities such as wooden sticks, wood chips, veils, plastics, foams, and fibers with a density smaller than water float on the water surface due to the buoyant force.

[0026] (3) The bottom water inlet is arranged at the bottom of the tank body of the impurity removal device. The light impurities that sink to the bottom along with the clean coal particles due to adhesion and extrusion can be brought to the water surface by the water flow impact of the bottom water inlet.

[0027] (4) The top water inlet is arranged laterally to the impure clean coal inlet. The water flow direction of the inlet flows from the side of the inlet to the side of the overflow port. The light impurities floating on the water surface can be sent to the overflow port by the water flow, so as to enter the debris dehydration screen.

[0028] (5) Because the size, dimension and shape of the light impurities in the clean coal are different, the overflow water is difficult to enter the impurity dewatering screen completely and is easy to block the overflow port, so the impurity removing scraper is installed at the position of the overflow port, which hangs the impurities accumulated in the overflow port into the impurity dewatering screen through rotation.

[0029] (6) The clean coal particles sinking into the bottom are driven by the scraper chain to the discharge port of the shallow groove impurity removing equipment, and then fall into the clean coal dewatering equipment for dewatering.

[0030] The impurity removing scraper is made of soft material such as rubber to avoid damage caused by impurity jamming during use. The impurity removing clean coal obtained by screening from the shallow impurity removing equipment is directly sent to the clean coal dewatering equipment for dewatering, and the impurity removing clean coal without impurities is obtained after dewatering. The water flowing out of the overflow port of the impurity removing equipment, the impurity dewatering screen and the clean coal dewatering equipment is collected through the trench set at the bottom of the system to realize recycling. Flexible scraper teeth are arranged on the scraper blade, the rotating shaft of the scraper is fixed on the two side walls of the overflow port through the bearing seat, and the circumferential movement of the scraper blade is realized through the driving of the driving wheel, so that the light impurities staying at the position of the overflow port are periodically removed.

[0031] Finally, it is pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, and other modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art should be covered in the scope of the claims of the present application as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A clean coal impurity removal system, comprising a shallow trough sorting device (1) and a dewatering device (2), characterized in that: The shallow trough sorting equipment (1) and the dewatering equipment (2) are connected together through the interface (202) of the impurity removal equipment. After the impurity-containing clean coal enters the shallow trough sorting equipment (1), impurities are removed and discharged through the impurity dewatering screen (3). The clean coal enters the dewatering equipment (2) for dewatering and is then discharged.

2. The clean coal impurity removal system according to claim 1, characterized in that: The shallow trough sorting device (1) includes a trough (101), a rotating scraper chain (102) is provided inside the trough (101), a bottom water inlet (103) is provided below the trough (101), a top water inlet (104) is provided above one side of the trough (101), a coal inlet (5) containing impurities is provided above the trough, an overflow outlet (1011) is provided on one side above the trough (1011), a scraper for removing impurities (4) is provided at the overflow outlet (1011), and the overflow outlet (1011) is adjacent to the impurity dewatering screen (3).

3. The clean coal impurity removal system according to claim 2, characterized in that: The debris dewatering screen (3) is provided with a debris outlet (301), the height of which is lower than the height of the overflow outlet (1011).

4. The clean coal impurity removal system according to claim 2, characterized in that: The impurity removal scraper (4) includes a bearing seat (402) installed on the side wall (405) of the overflow port. The rotating shaft (401) is installed in the bearing seat (402) through a bearing (403). One end of the rotating shaft (401) is driven to rotate by a drive wheel (404). The rotating shaft (401) is provided with a scraper blade (406) with flexible scraping teeth (407).

5. The clean coal impurity removal system according to claim 1, characterized in that: The dewatering equipment (2) has a dewatered and impurity-removed clean coal discharge port (201) on the side away from the shallow trough sorting equipment (1).

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