Coal slime water treatment and cyclic utilization system of kilometer drilling machine

Abstract

The utility model discloses a coal slime water treatment and cyclic utilization system of a kilometer drilling machine, which comprises a coal water screening and collecting all-in-one machine, a coal slime water centrifugal separation device and a precision filter, the coal water screening and collecting all-in-one machine is arranged at the front end of the kilometer drilling machine, and a gas-liquid separator of the kilometer drilling machine is used for separating a gas phase from the coal slime water; separated slime water is introduced into a coal water screening and collecting all-in-one machine to be subjected to rough filtration treatment, and rough separation and temporary storage of solid and liquid are achieved; coal slime treated by the coal water screening and collecting all-in-one machine is pumped to a centrifugal solid-liquid separator of the coal slime water centrifugal separation device for secondary solid-liquid separation, liquid obtained after secondary solid-liquid separation is treated by a precision filter, and treated clear water is introduced into a clear water tank to be reused by a kilometer drilling machine. Backwash wastewater of the precision filter flows back to the coal water screening and collecting all-in-one machine for retreatment. In-situ efficient treatment of slime water and cyclic utilization of clear water can be achieved, the problems of underground water shortage, large drainage pressure and water sump desilting are solved, the production cost is reduced, and the working environment is improved.

Description

A kilometer-long drilling rig coal slurry water treatment and recycling system Technical Field

[0001] This utility model relates to the field of coal mine water treatment technology, specifically to a kilometer-long drilling rig coal slurry water treatment and recycling system. Background Technology

[0002] In underground coal mine operations, kilometer-deep directional drilling rigs are key equipment for gas extraction and pressure release, requiring large amounts of clean water for flushing, cooling, and lubrication within the borehole. However, the coal slurry water discharged from the drilling rig typically contains a large amount of fine coal particles, rock powder, and suspended solids. If discharged directly without treatment, it will not only exacerbate water siltation and increase the drainage burden but also lead to resource waste and environmental pollution.

[0003] Currently, the treatment of coal slurry water mainly relies on a five-stage surface transfer system, requiring multiple transports of the coal slurry water to surface treatment facilities for centralized purification. This model is not only time-consuming, labor-intensive, and costly in terms of transportation, but also inefficient. Furthermore, the periodic dredging of the water tanks is labor-intensive, significantly hindering the efficiency of underground construction. In addition, existing treatment equipment generally suffers from limitations such as large size, low automation, and inability to adapt to the confined and slippery underground environment, making it difficult to achieve on-site treatment and recycling of coal slurry water, resulting in high operational pressure on underground water supply and drainage systems.

[0004] Therefore, there is an urgent need for a coal slurry water treatment system that is small in size, highly efficient, easy to operate, and capable of on-site treatment, adaptable to the working environment of kilometer-deep drilling rigs, and capable of recycling coal slurry water to reduce water waste and post-treatment costs. Summary of the Invention

[0005] The purpose of this utility model is to provide a coal slurry water treatment and recycling system for kilometer drilling rigs, which realizes efficient on-site treatment of coal slurry water and recycling of clean water, solves the problems of water shortage, high drainage pressure and siltation of water tanks in underground mines, reduces production costs and improves the working environment.

[0006] The technical solution adopted in this utility model is a coal slurry water treatment and recycling system for a kilometer drilling rig, including a coal slurry water screening and collection integrated machine, a coal slurry water centrifugal separation device, and a precision filter. The coal slurry water screening and collection integrated machine is installed at the front end of the kilometer drilling rig. The gas-liquid separator of the kilometer drilling rig separates the gas phase and the coal slurry water. The separated coal slurry water is introduced into the coal slurry water screening and collection integrated machine for coarse filtration treatment, realizing coarse separation and buffering of solid and liquid. The coal slurry water treated by the coal slurry water screening and collection integrated machine is pumped to the centrifugal solid-liquid separator of the coal slurry water centrifugal separation device for secondary solid-liquid separation. The liquid after secondary solid-liquid separation is then treated by the precision filter. The treated clean water is introduced into the clean water pool and supplied to the kilometer drilling rig for reuse. The backwash wastewater of the precision filter is returned to the coal slurry water screening and collection integrated machine for further treatment.

[0007] Furthermore, the coal slurry separated by the coal-water screening and collection integrated machine and the centrifugal solid-liquid separator is loaded into collection bags or directly transported to the coal bunker by belt conveyor.

[0008] Furthermore, it includes a PLC control system, which integrates pressure and flow sensors and is electrically connected to the coal-water screening and collection machine, the centrifugal solid-liquid separator, and the precision filter. The PLC control system monitors water quality parameters in real time and automatically adjusts the centrifugal force of the centrifugal solid-liquid separator and the backwashing frequency of the precision filter.

[0009] Furthermore, the integrated coal-water screening and collection machine has a screen aperture size of 1-3mm and a processing capacity of >20m³ / h. The centrifugal solid-liquid separator adopts dual frequency conversion speed regulation, with a processing capacity of 15-30m³ / h. The precision filter has an accuracy of 15μm and a design pressure of 2.5MPa.

[0010] Furthermore, the centrifugal solid-liquid separator is mounted on a tracked flatbed truck.

[0011] This utility model has the following beneficial effects:

[0012] 1. It can realize on-site treatment of coal slurry water and reuse of clean water. The system includes components such as screening, centrifugal separation and precision filtration, which can quickly and efficiently separate solid particles from water in coal slurry water, avoid transporting it to the ground for treatment, reduce energy consumption for transfer and pumping, and realize the recycling of clean water at the drilling rig operation site.

[0013] 2. It can improve processing efficiency and automation. The PLC control system enables intelligent linkage between each processing unit. By monitoring key parameters such as pressure and flow rate in real time, it automatically adjusts the centrifugation speed and backwashing frequency, which greatly improves system stability and processing efficiency, reduces manual intervention, and improves operational safety.

[0014] 3. Modular design to adapt to downhole working conditions: The equipment adopts a standardized and modular structural design, with a compact overall structure and small size, which makes it easy to be flexibly arranged and moved in narrow and complex downhole environments, meeting the needs of efficient operation under complex downhole working conditions.

[0015] 4. It can reduce the burden on the water tank and the amount of dredging work, effectively reduce the amount of coal slurry water discharged into the water tank, reduce the accumulation rate of sediment in the water tank, extend the dredging cycle, reduce the intensity of manual dredging, and improve the overall operating efficiency of underground operations.

[0016] 5. It is resource-saving and environmentally friendly, enabling the maximum reuse of water resources in coal slurry, reducing dependence on external water supply for drilling operations, saving water costs, and avoiding environmental pollution caused by coal slurry discharge, which is in line with the concept of green mining and sustainable development in coal mines. Attached Figure Description

[0017] Figure 1 is a diagram of the equipment layout of this utility model;

[0018] Figure 2 is a process flow diagram of this utility model;

[0019] Figure 3 is a front view of the coal-water screening and collection integrated machine of this utility model;

[0020] Figure 4 is a front view of the coal slime water centrifugal separation device of this utility model;

[0021] Figure 5 is a front view of the precision filter of this utility model.

[0022] In the diagram: 1. Vibrating screen; 2. Base frame; 3. Centrifugal solid-liquid separator; 4. Tracked flatbed truck; 5. Fully automatic backwash filter. Detailed Implementation

[0023] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a kilometer-long drilling rig coal slurry water treatment and recycling system.

[0024] As shown in Figures 1 and 2, a coal slurry water treatment and recycling system for a kilometer drilling rig includes an integrated coal and water screening and collection machine, a coal slurry water centrifugal separation device, and a precision filter. The integrated coal and water screening and collection machine is installed at the front working face of the kilometer drilling rig, a coal slurry water centrifugal separation device is used in the middle, and a precision filter is used at the end to improve the water quality of the separated coal slurry water to meet the water demand of the high-precision motor of the kilometer drilling rig during operation.

[0025] The system operates by using the drilling rig to discharge coal. The gas-liquid separator (collector) on the rig separates the gas phase from the coal slurry water. The separated coal slurry water undergoes coarse filtration using a coal-water screening and collection integrated machine, achieving coarse solid-liquid separation and buffering. The treated coal slurry water is then pumped to the centrifugal solid-liquid separator 3 of the coal slurry water centrifugal separation unit for secondary solid-liquid separation. The separated coal slurry is either collected in collection bags or directly transported to the coal bunker by conveyor belt, thus essentially achieving coal recovery. The liquid after secondary solid-liquid separation is then treated by a precision filter. The treated clean water is supplied to the drilling rig for reuse, while the backwash wastewater is returned to the front end of the system for further treatment.

[0026] As shown in Figure 3, the coal-water screening and collection integrated machine includes a vibrating screen 1 and a base frame 2. The vibrating screen 1 removes large particles ≥0.5mm from the coal slurry water, reducing the solid phase concentration and reducing pipeline wear.

[0027] As shown in Figure 4, the coal slime centrifugal separation device includes a centrifugal solid-liquid separator 3 and a tracked flatbed truck 4. The centrifugal solid-liquid separator 3 is installed on the tracked flatbed truck 4. The centrifugal solid-liquid separator 3 controls the centrifugal force through dual frequency conversion speed regulation to achieve secondary solid-liquid separation. The moisture content of the coal slime after separation is ≤20%.

[0028] As shown in Figure 5, the precision filter is equipped with a fully automatic backwash filter 5 with a precision of 15μm, ensuring that the solid content of the clean water is ≤20mg / L.

[0029] This system also includes a PLC control system, which integrates pressure and flow sensors and is electrically connected to the coal-water screening and collection unit, the centrifugal solid-liquid separator 3, and the precision filter. It monitors water quality parameters in real time and automatically adjusts the centrifugal force of the coal slurry-water centrifugal separator and the backwashing frequency of the precision filter. Specifically, the PLC control system uses a mining-grade explosion-proof and intrinsically safe controller, integrating data acquisition, intelligent control, and fault alarm functions, and supports Modbus / Profibus protocols.

[0030] During on-site installation, the integrated coal-water screening and collection machine, coal slime centrifugal separator, and precision filter are placed near the drilling rig's working face, connected to the drainage outlet of the kilometer-long drilling rig collector via high-pressure hoses. Explosion-proof cables are laid to connect the PLC controller to the sensors and frequency converters of each device, enabling data exchange.

[0031] Perform no-load test runs on all equipment and calibrate pressure and flow sensors. Set PLC parameters: centrifugal differential speed 5-15Hz, backwash pressure differential 0.1MPa trigger. Set operation control: after the drilling rig starts, the system automatically starts the integrated coal-water screening and collection machine; when the coal slurry water flow rate is >15m³ / h, the centrifugal solid-liquid separator 3 frequency converter starts.

[0032] The precision filter automatically backwashes based on the inlet and outlet pressure difference. The backwash wastewater is returned to the coal-water screening and collection machine for further treatment via a guide channel. The screen of the coal-water screening and collection machine is cleaned weekly, and the bearing lubrication of the centrifugal solid-liquid separator 3 is checked monthly. The filter element of the precision filter is replaced quarterly, and the backwash pipeline is cleaned.

[0033] This system is a fully automated small-volume water treatment system suitable for efficient water-saving operations in underground coal mines. The system has a processing capacity of ≥15 m³ / h, a reuse rate of ≥90%, and individual equipment dimensions of ≤4m in length, ≤1.6m in width, and ≤1.7m in height, adaptable to underground transportation. This system effectively addresses the current needs of small-volume water treatment in mines. Based on existing mine automation control requirements, it integrates an explosion-proof controller for fully automated control. Users can independently program the separation operation according to their needs, meeting the requirements of various environments. It avoids the high cost of power infrastructure, saving over 1.2 million yuan annually and reducing underground safety risks.

[0034] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A coal slurry water treatment and recycling system for a kilometer-deep drilling rig, characterized in that, The system includes a coal-water screening and collection integrated machine, a coal slurry-water centrifugal separation device, and a precision filter. The coal-water screening and collection integrated machine is installed at the front end of the kilometer drilling rig. The gas-liquid separator of the kilometer drilling rig separates the gas phase and the coal slurry-water. The separated coal slurry-water is introduced into the coal-water screening and collection integrated machine for coarse filtration treatment to achieve coarse separation and buffering of solid and liquid. The coal slurry-water treated by the coal-water screening and collection integrated machine is pumped to the centrifugal solid-liquid separator (3) of the coal slurry-water centrifugal separation device for secondary solid-liquid separation. The liquid after secondary solid-liquid separation is then treated by the precision filter. The treated clean water is introduced into the clean water pool for reuse by the kilometer drilling rig. The backwash wastewater of the precision filter is returned to the coal-water screening and collection integrated machine for further treatment.

2. The kilometer-long drilling rig coal slurry water treatment and recycling system according to claim 1, characterized in that, The coal-water screening and collection integrated machine and the centrifugal solid-liquid separator (3) The coal slurry separated from the solid and liquid is put into a collection bag or directly transported to the coal bunker by belt.

3. The kilometer-long drilling rig coal slurry water treatment and recycling system according to claim 1, characterized in that, It includes a PLC control system, which integrates pressure and flow sensors and is electrically connected to the coal-water screening and collection machine, the centrifugal solid-liquid separator (3) and the precision filter. It monitors water quality parameters in real time and automatically adjusts the centrifugal force of the centrifugal solid-liquid separator (3) and the backwashing frequency of the precision filter.

4. The coal slurry treatment and recycling system for a km drilling rig of claim 3, wherein, The integrated coal-water screening and collection machine has a screen hole size of 1-3mm and a processing capacity of >20m³ / h. The centrifugal solid-liquid separator (3) adopts dual frequency conversion speed regulation, with a processing capacity of 15-30m³ / h, a precision filter accuracy of 15μm, and a design pressure of 2.5MPa.

5. The coal slurry treatment and recycling system for a km drilling rig according to any one of claims 1-4, characterized in that, The centrifugal solid-liquid separator (3) is installed on a tracked flatbed truck (4).

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