Dust removal device by cyclone dehydration

Abstract

The utility model discloses a cyclone dewatering dust collector, including sewage collection tank, fluidic device and cyclone dewatering device, fluidic device is used for releasing water mist and sprays high -speed airflow, and high -speed airflow produces negative pressure and inhales water mist, dust and gas containing gas mixture formation mixed fluid after, and mixed fluid dashes into cyclone dewatering device, and through centrifugal action gas -liquid separation in cyclone dewatering device, and sewage collection tank top with cyclone dewatering device top at least one place is provided with gas exhaust, and the separated gas containing gas is discharged through gas exhaust, and the separated slurry water enters sewage collection tank, water mist and dust are affected by centrifugal force and airflow in cyclone dewatering device and are urged, both rotate and flow along the barrel wall, at this moment, dust and water mist drop realize full combination, and dust atomization is thorough, and is combined into slurry water with water pollution and rotates and sprays from cyclone dewatering device barrel bottom opening.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, specifically to a cyclone dehydration and dust removal device. Background Technology

[0002] Drilling to extract gas is a necessary means of controlling gas in high-gas coal mines. When using compressed air drilling, a large amount of dust is generated. Therefore, wet dust removal devices are often used at the borehole opening during compressed air drilling.

[0003] The most effective application of wet-type orifice dust collectors currently involves using a jet jet designed based on Bernoulli's principle to generate negative pressure, drawing in the dust generated during drilling. However, this method often suffers from incomplete dust removal, with a significant amount of water failing to fully combine with the dust, resulting in insufficient dust removal, inadequate treatment standards, and excessive dust emissions. This prevents the improvement of the crucial respirable dust rate, thus impacting worker health. Another issue is that the dust collector's tail-end discharge system connects to the underground gas extraction pipeline. Due to the high-speed airflow from the jet jet and excessively high negative pressure in the underground pipeline, some water and slag are ejected from the gas collector's discharge port and enter the underground gas extraction pipeline. Over time, this frequently causes blockages in the underground gas extraction pipeline. Once blocked, the gas extraction pipeline is difficult to clean and can easily lead to safety accidents, becoming a major challenge in underground gas dust control.

[0004] To solve the above two problems, this utility model proposes a cyclone dehydration and dust removal device that can solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a cyclone dehydration and dust removal device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cyclone dewatering and dust removal device, comprising:

[0007] Wastewater collection tank;

[0008] The jet injector is used to release water mist and spray high-speed airflow. The high-speed airflow generates negative pressure, which draws in water mist, dust and gas-containing gases, and mixes them to form a mixed fluid.

[0009] A hydrocyclone dehydrator is used to dehydrate mixed fluids, which are then separated into gas and liquid by centrifugal force.

[0010] At least one of the tops of the sewage collection tank and the top of the cyclone dewatering device is provided with a gas outlet. The separated gas-containing gas is discharged through the gas outlet, and the separated muddy water enters the sewage collection tank.

[0011] As a preferred technical solution, the jet injector is kept horizontal at the top of the sewage collection tank.

[0012] As a preferred technical solution, it also includes a dust collection pipe and a composite blowout preventer. The dust collection pipe is used to collect dust and methane-containing gas generated by compressed air drilling. The composite blowout preventer is located at the rear end of the dust collection pipe and has a dust conveying interface at the top. The dust conveying interface is connected to a dust conveying pipe, which is connected to the jet injector.

[0013] As a preferred technical solution, the composite blowout shield has a slag discharge port located at the bottom.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In the hydrocyclone dewatering unit, water mist and dust are affected by centrifugal force and airflow. Both rotate and flow along the barrel wall. At this time, dust and water mist droplets are fully combined. The dust is thoroughly atomized and combines with water to form muddy water, which is then sprayed out from the bottom of the hydrocyclone dewatering unit.

[0016] When the gas containing methane rotates and flows downwards inside the cyclone dehydrator, it forms an internal vortex upward airflow due to the compression of the cone, which more effectively achieves dehydration, dust removal and emission. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure;

[0018] In the diagram: 1. Dust collection pipe; 2. Composite blowout shield; 3. Dust conveying interface; 4. Slag discharge port; 5. Dust conveying pipe; 6. Sewage collection tank; 7. Cyclone dewatering device; 8. Gas outlet; 9. Jet ejector; 10. Mobile wheel set; 11. Sewage outlet. Detailed Implementation

[0019] The following is a detailed description of a cyclone dewatering and dust removal device according to an embodiment of the present disclosure, with reference to the accompanying drawings. To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions in the embodiments of this disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure.

[0020] Therefore, the following detailed description of embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without inventive effort are within the scope of protection of the present disclosure.

[0021] A cyclone dehydration and dust removal device comprises a dust collection pipe 1, a composite blowout shield 2, a wastewater collection tank 6, an ejector 9, and a cyclone dehydrator 7. The dust collection pipe 1 and the composite blowout shield 2 are designed with high airtightness to avoid gas leakage and negative pressure drop. Multiple nozzles connected to the water pipe at the inlet end of the ejector 9 spray water mist. Multiple airflow nozzles behind the water mist generate a forward high-speed airflow, creating a negative pressure on the water mist side, thereby drawing in water mist, dust, and gas-containing gases. The mixture is then mixed in the ejector to generate a mixed fluid that flows into the cyclone dehydrator 7.

[0022] Dust collection pipe 1 is used to collect dust and methane gas discharged from compressed air drilling. Composite blowout shield 2 is set at the rear end of dust collection pipe 1. Composite blowout shield 2 has a dust conveying interface 3 at the top and a slag discharge port 4 at the bottom. The slag discharge port 4 is connected to a collection box to discharge larger (heavier) dust. Dust conveying interface 3 is connected to dust conveying pipe 5.

[0023] Wastewater collection tank 6 is used to collect mud and water. The bottom of wastewater collection tank 6 is equipped with a set of casters 10 for mobility. The top of wastewater collection tank 6 has an observation port. A hydrocyclone dewatering device 7 is installed on the top of wastewater collection tank 6. At least one of the tops of hydrocyclone dewatering device 7 and wastewater collection tank 6 is provided with a gas vent 8. The separated gas-containing gas is discharged through the gas vent 8, and the separated mud and water (a combination of dust and water mist) enters wastewater collection tank 1. The gas vent 8 can be provided on the top of hydrocyclone dewatering device 7 or wastewater collection tank 6 alone to allow the separated gas-containing gas to be discharged. Alternatively, gas vent 8 can be provided on the tops of both hydrocyclone dewatering device 7 and wastewater collection tank 6 to avoid the problem of gas not being discharged in time when a gas eruption occurs.

[0024] When two gas outlets 8 are set, the two gas outlets 8 can be connected to the well gas pipeline individually or simultaneously. The air extraction capacity of the underground gas pipeline is greater than the air intake capacity of the ejector 9. Regardless of whether they are connected simultaneously or individually, mud and water will not be discharged to cause blockage of the underground gas pipeline.

[0025] The bottom of the hydrocyclone dewatering device 7 has a conical opening. The jet ejector 9 is kept horizontal at the top of the sewage collection tank 6. One end of the jet ejector 9 is connected to the dust conveying pipe 5, and the other end is connected to the hydrocyclone dewatering device 7. The jet ejector 9 releases water mist and sprays out high-speed airflow. The high-speed airflow generates negative pressure, which draws in water mist, dust and gas-containing gas, mixes them and rushes into the hydrocyclone dewatering device 7. The jet ejector 9 increases the negative pressure and accelerates the gas flow rate, providing sufficient velocity to the dust-containing gas, thereby forming a better centrifugal separation effect.

[0026] The jet ejector 9 and the cyclone dehydrator 7 are made of stainless steel, which is corrosion resistant and will not affect the dust removal and dehydration effect due to the decrease in the flow rate of the mixed gas caused by corrosion of the inner wall. They also have a long service life.

[0027] Working principle:

[0028] Dust collection pipe 1 collects dust and methane-containing gases discharged from compressed air drilling. Ejector 9 releases water mist and sprays high-speed airflow. The high-speed airflow generates negative pressure, drawing in water mist, dust, and methane-containing gases, which then mix to form a mixed fluid. This mixed fluid enters through the cross-section of cyclone dehydrator 7. Because the mixed fluid enters cyclone dehydrator 7 at a relatively high speed, the heavier dust particles and water droplets in the mixed fluid are thrown towards the wall of cyclone dehydrator 7. After colliding with the wall, the dust and water droplets lose kinetic energy and flow downwards along the wall at high speed. Driven by the airflow, the mixed fluid flows down the wall of the cyclone dewatering device 7 in a rotating manner. During this process, both water mist and dust are affected by centrifugal force and airflow, and both rotate and flow along the wall. At this time, the dust and water mist are fully combined, the dust is thoroughly atomized, and it combines with the water mist to form mud water, which is sprayed out from the bottom of the cyclone dewatering device 7 and enters the sewage collection tank 6 below. The sewage collection tank 6 is connected to the sewage pipe to discharge into the well drainage system or sedimentation tank, so that the water can be reused.

[0029] When the rotating and descending mixed fluid reaches the bottom of the cone of the cyclone dewatering device 7, the outer vortex airflow is transformed into an upward inner vortex airflow due to the compression effect of the conical opening on the airflow. At this time, the water sludge in the mixed fluid has been thrown towards the wall of the cyclone dewatering device 7 under the action of centrifugal force and flows down in a rotating manner. Only clean gas containing methane is left in the upward inner vortex airflow, which is discharged from a gas outlet 8 on the cyclone dewatering device 7 into the underground gas pipeline. In addition, some of the clean gas containing methane that enters the sewage collection tank 6 can be discharged from the gas outlet 8 on the sewage collection tank 6 into the underground gas pipeline. In this state, not only is the dust fully atomized, but also the dust water mist and methane-containing gas are completely separated.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cyclone dewatering and dust removal device, characterized in that, include: Wastewater collection tank; The jet injector is used to release water mist and spray high-speed airflow. The high-speed airflow generates negative pressure, which draws in water mist, dust and gas-containing gases, and mixes them to form a mixed fluid. A hydrocyclone dehydrator is used to dehydrate mixed fluids, which are then separated into gas and liquid by centrifugal force. At least one of the tops of the sewage collection tank and the top of the cyclone dewatering device is provided with a gas outlet. The separated gas-containing gas is discharged through the gas outlet, and the separated muddy water enters the sewage collection tank.

2. The cyclone dewatering and dust removal device according to claim 1, characterized in that, The jet injector is kept horizontal at the top of the wastewater collection tank.

3. The cyclone dewatering and dust removal device according to claim 1, characterized in that, It also includes a dust collection pipe and a composite blowout preventer. The dust collection pipe is used to collect dust and methane-containing gases generated by compressed air drilling. The composite blowout preventer is located at the rear end of the dust collection pipe and has a dust conveying interface at the top. The dust conveying interface is connected to a dust conveying pipe, which is connected to the jet injector.

4. The cyclone dewatering and dust removal device according to claim 3, characterized in that, The composite blowout shield has a slag discharge port located at the bottom.

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