A mine wet dust collector

Abstract

This invention relates to the field of dust removal, specifically to a wet dust collector for mining, comprising a dust removal main unit, an atomizing spray assembly, a multi-stage gas-liquid interception assembly, a stratified sedimentation water circulation assembly, and a sludge treatment assembly. The atomizing spray assembly and the multi-stage gas-liquid interception assembly are sequentially arranged within the dust removal main unit. The stratified sedimentation water circulation assembly includes a chemical mixing tank, a secondary sedimentation tank, and a clear water tank connected in sequence. The multi-stage gas-liquid interception assembly intercepts dripping sludge and wastewater, which flows into the chemical mixing tank. The clear water tank is connected to the atomizing spray assembly. The sludge treatment assembly includes a sludge pump, sludge pipes, and a sludge filter press. The bottoms of the chemical mixing tank and the secondary sedimentation tank are connected to the sludge filter press via the sludge pump and sludge pipes. This technical solution facilitates multi-stage interception of dust-laden airflow, water resource recycling, and compliant sludge treatment.

Description

Technical Field

[0001] This invention relates to the field of dust removal, specifically to a wet dust collector for mining. Background Technology

[0002] Coal mining operations generate a large amount of dust-laden airflow, namely coal dust. Coal dust not only seriously pollutes the working environment in underground roadways and endangers the occupational health of workers, easily causing pneumoconiosis, but also poses an explosion hazard with high concentrations of coal dust, making it a key target for safety control in coal mine production.

[0003] Existing wet dust collectors in coal mines generally suffer from defects such as poor dust grading effect, incomplete gas-liquid separation, low water resource utilization rate, and non-standard sludge treatment. The single interception structure of existing dust collection equipment is prone to problems such as water carried by the airflow and dust entrained by water mist during discharge, and the dust suppression effect needs to be improved. At the same time, it will lead to high moisture content in clean air, which can easily cause corrosion of tunnel equipment.

[0004] Moreover, the existing dust removal equipment has a simple water circulation system design. The dust-containing wastewater generated by spray interception is directly discharged or discharged after simple sedimentation. The solid-liquid separation effect of wastewater is poor, the sedimented sludge is difficult to clean, and the sludge is easily disposed of indiscriminately, which can cause secondary pollution in coal mines and cannot meet the environmental protection compliance requirements of coal mines. Summary of the Invention

[0005] The present invention aims to provide a wet dust collector for mining, which can perform multi-stage interception of dust-laden airflow, water resource recycling, and compliant sludge treatment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a wet dust collector for mining, comprising a dust collector main unit, an atomizing spray assembly, a multi-stage gas-liquid interception assembly, a stratified sedimentation water circulation assembly, and a sludge treatment assembly; the atomizing spray assembly and the multi-stage gas-liquid interception assembly are sequentially arranged within the dust collector main unit; the stratified sedimentation water circulation assembly includes a chemical mixing tank, a secondary sedimentation tank, and a clear water tank connected in sequence; the multi-stage gas-liquid interception assembly intercepts dripping sludge and wastewater, which flows into the chemical mixing tank; the clear water tank is connected to the atomizing spray assembly; the sludge treatment assembly includes a sludge pump, a sludge pipe, and a sludge filter press; the bottoms of the chemical mixing tank and the secondary sedimentation tank are connected to the sludge filter press via the sludge pump and the sludge pipe.

[0007] Furthermore, the multi-stage gas-liquid interception assembly includes a filter screen and a corrugated demister arranged in sequence. The corrugated demister is located above the dosing and mixing tank. The filter screen and the corrugated demister intercept the dripping sludge and wastewater, which then flows into the dosing and mixing tank at the corrugated demister.

[0008] Furthermore, the atomizing spray assembly includes a spray pipe and a circulating water pump, with the spray pipe connected to a clear water tank via the circulating water pump.

[0009] Furthermore, the filter and spray nozzle are angled.

[0010] Furthermore, a stirring motor is installed above the dosing and mixing tank, and the stirring motor is connected to a stirring impeller, which is located inside the dosing and mixing tank.

[0011] Furthermore, it also includes a self-regulating water supply component, which includes a level gauge, a water supply pipe, and a controller. The level gauge is located in the clear water tank, and a water supply valve is installed on the water supply pipe. The level gauge is electrically connected to the water supply valve through the controller.

[0012] The beneficial effects of this plan are: 1. This solution employs a multi-stage dust removal structure combining atomized spraying with primary interception by a filter screen and fine interception by a waveform demister. After the dust-laden air is fully mixed with the atomized liquid, large dust particles settle down with the mud droplets, while fine suspended dust and residual water mist are intercepted a second time by the waveform demister. This achieves a dust removal efficiency of over 98.5% for dust particles larger than 2μm in underground coal mines, and a removal rate of over 88% for fine respirable dust particles of 0.5-2μm. Compared to single-stage spray dust removal equipment, the overall dust removal efficiency is improved by 15%-25%. This solution solves the problems of incomplete purification, water carryover in the airflow, and escape of fine dust in traditional single-stage spray dust removal. The purified air discharged is clean air, significantly improving the dust purification efficiency in underground coal mines, effectively reducing the dust concentration in roadways, and protecting the occupational health of workers.

[0013] 2. Through a two-stage sedimentation structure of mixing and homogenizing in a chemical dosing tank and settling in a secondary sedimentation tank, the turbidity of the water can be reduced to below 10 NTU, achieving efficient solid-liquid separation of dusty wastewater. The clarified water is returned to the clear water tank for circulation and supply to the atomizing spray, forming a closed water circulation system. This reduces the consumption of well water resources by more than 85%, thus reducing the consumption of well water resources.

[0014] 3. The clear water tank is equipped with a level gauge and a water replenishment valve, which can monitor the clear water tank level in real time. When the level is lower than the threshold, water is automatically replenished, accurately maintaining the stable spray water supply pressure and water volume. The failure downtime rate is reduced by more than 80%, effectively avoiding malfunctions such as water pump dry running, insufficient spray, and dust removal failure caused by uncontrolled dust collector level. This ensures the stable operation of the dust collector and is suitable for continuous and uninterrupted dust removal operations in underground coal mines.

[0015] 4. The concentrated sludge from the bottom of the chemical mixing tank and the secondary sedimentation tank is centrally pumped out by sludge pumps and transported to the sludge filter press for mechanical dewatering and drying. The sludge moisture content is reduced to below 60%, achieving compliant and compliant sludge discharge. This solves problems such as random sludge accumulation, high labor intensity of manual dredging, and secondary dust generation underground. After dewatering, the sludge can be discharged in compliance with regulations or disposed of as a resource, meeting the operational standards for green and environmentally friendly coal mining.

[0016] 5. This device integrates dust removal and purification, sedimentation water circulation, automatic water replenishment, and sludge dewatering functions into one integrated system. It has a compact structure, reasonable layout, and reduces the floor space by more than 30%. It is suitable for narrow and complex working environments such as underground roadways and mining faces in coal mines. It has a high degree of automation, is easy to operate, and runs stably. It has multiple advantages such as effective dust removal, water and energy saving, and environmental compliance, and has high value for promotion and application. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention.

[0018] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings of the instruction manual include: spray pipe 1, filter screen 2, corrugated demister 3, chemical mixing tank 4, secondary sedimentation tank 5, clear water tank 6, stirring motor 7, stirring impeller 8, sludge pump 9, sludge filter press 10, circulating water pump 11, level gauge 12, and water supply valve 13. Detailed Implementation

[0019] Example 1 like Figure 1 The diagram shows a wet dust collector for mining, comprising a dust collector main unit, an atomizing spray assembly, a multi-stage gas-liquid interception assembly, a stratified sedimentation water circulation assembly, and a sludge treatment assembly. An exhaust fan is installed at the air outlet (left end) of the dust collector main unit. The atomizing spray assembly and the multi-stage gas-liquid interception assembly are arranged sequentially from right to left within the dust collector main unit. The atomizing spray assembly includes a spray pipe 1, a circulating water pump 11, and a water pipe. The spray pipe 1 has several spray holes and can be positioned on one side of the dust collector main unit or positioned on both sides of the dust collector main unit for relative spraying. The multi-stage gas-liquid interception assembly includes a filter screen 2 and a corrugated demister 3 arranged sequentially from right to left. The filter screen 2 and the spray pipe 1 are inclined, and the filter screen 2 is fixed and locked inside the dust collector main unit by bolts.

[0020] The stratified sedimentation water circulation component includes a chemical mixing tank 4, a secondary sedimentation tank 5, and a clear water tank 6 connected sequentially from left to right. The connection method is that the upper end can be connected by overflow. The corrugated demister 3 is located above the chemical mixing tank 4. The filter screen 2 and the corrugated demister 3 intercept the dripping mud and sewage. The multi-stage gas-liquid interception component intercepts the dripping mud and sewage, which flows into the chemical mixing tank 4 at the corrugated demister 3. A stirring motor 7 is fixedly installed above the chemical mixing tank 4. The stirring motor 7 is connected to a stirring impeller 8, which is located inside the chemical mixing tank 4.

[0021] The sludge treatment assembly includes a sludge pump 9, sludge pipes, and a sludge filter press 10. The bottoms of the chemical mixing tank 4 and the secondary sedimentation tank 5 are connected to the sludge filter press 10 via the sludge pump 9 and sludge pipes. The bottoms of the chemical mixing tank 4 and the secondary sedimentation tank 5 are also connected to the sludge pump 9 via sludge pipes, and the sludge pump 9 is in turn connected to the sludge filter press 10. The clear water tank 6 is connected to the circulating water pump 11 via water pipes, and the circulating water pump 11 is in turn connected to the spray pipe 1 via water pipes.

[0022] Example 2 Based on Example 1, this example also includes a self-controlled water replenishment component. The self-controlled water replenishment component includes a level gauge 12, a water replenishment pipe, and a controller. The level gauge 12 is installed in the clear water tank 6, and a water replenishment valve 13 is installed on the water replenishment pipe. The level gauge 12 is electrically connected to the water replenishment valve 13 through the controller. When the level is lower than the set threshold, water can be replenished to the clear water tank 6 by opening the water supply valve to ensure the stable operation of the dust collector.

[0023] Example 3 Based on embodiment 1 or 2, a spindle-shaped plate is provided between the spray pipes 1 arranged opposite each other on both sides. The spindle-shaped plate is spindle-shaped when viewed from above. Atomized water is sprayed on the curved surfaces on both sides of the spindle. The water mist extends and spreads along the curved surface, no longer a point-like direct spray. The dust-laden airflow flows along the water film on the curved surface, resulting in a longer contact time and a larger contact area. The settling effect of ultrafine coal dust is significantly improved, solving the industry pain point that fine dust is difficult to capture and easy to escape. At the same time, it greatly reduces the dust concentration entering the filter screen 2, which can effectively reduce the probability of filter screen 2 clogging and screen sticking, extend the filter screen cleaning cycle, and extend the continuous operation time of the dust collector.

[0024] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A mine wet dust collector characterized by: The system includes a dust removal main unit, an atomizing spray assembly, a multi-stage gas-liquid interception assembly, a stratified sedimentation water circulation assembly, and a sludge treatment assembly. The atomizing spray assembly and the multi-stage gas-liquid interception assembly are sequentially installed inside the dust removal main unit. The stratified sedimentation water circulation assembly includes a chemical mixing tank, a secondary sedimentation tank, and a clear water tank connected in sequence. The multi-stage gas-liquid interception assembly intercepts dripping sludge and wastewater, which flows into the chemical mixing tank. The clear water tank is connected to the atomizing spray assembly. The sludge treatment assembly includes a sludge pump, sludge pipes, and a sludge filter press. The bottoms of the chemical mixing tank and the secondary sedimentation tank are connected to the sludge filter press via the sludge pump and sludge pipes.

2. A wet scrubber for use in a mine as claimed in claim 1 wherein: The multi-stage gas-liquid interception assembly includes a filter screen and a corrugated demister arranged in sequence. The corrugated demister is located above the dosing and mixing tank. The filter screen and the corrugated demister intercept the dripping mud and wastewater, which then flows into the dosing and mixing tank at the corrugated demister.

3. A wet scrubber for use in a mine as claimed in claim 2 wherein: The atomizing spray assembly includes a spray pipe and a circulating water pump, with the spray pipe connected to a clear water tank via the circulating water pump.

4. A wet scrubber for use in a mine as claimed in claim 3 wherein: The filter and spray nozzle are set at an angle.

5. A wet scrubber for use in a mine as claimed in claim 4 wherein: A stirring motor is installed above the dosing and mixing tank, and the stirring motor is connected to a stirring impeller, which is located inside the dosing and mixing tank.

6. A wet scrubber for use in a mine according to claim 5 wherein: It also includes a liquid level self-control water replenishment component, which includes a liquid level gauge, a water replenishment pipe and a controller. The liquid level gauge is located in the clear water tank, and a water replenishment valve is installed on the water replenishment pipe. The liquid level gauge is electrically connected to the water replenishment valve through the controller.

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