Efficient filter element structure of mining carbon monoxide purifier

Abstract

The utility model discloses an efficient filter element structure of a mining carbon monoxide purifier, and relates to the field of mining equipment.The filter element structure adopts a cylindrical closed shell as a main body structure, and the two ends of the cylindrical closed shell are provided with a flange type air inlet connector and a flange type exhaust connector respectively; a grading filtering module, a flow dividing control module and a catalytic reaction module are sequentially integrated in the device in the gas flowing direction, and all the modules are connected through sealing transition structures so as to ensure gas path continuity. According to the device, cooperative operation of gas purification and catalytic unit online cleaning is achieved through modular design, and continuous uninterrupted work of the purifier is achieved.

Description

Technical Field

[0001] This application relates to the field of mining equipment, and in particular to a high-efficiency filter element structure for a mining carbon monoxide purifier. Background Technology

[0002] In the field of mine safety production, carbon monoxide purifiers are core equipment for ensuring the safety of underground working environments. Existing technologies generally employ the principle of catalytic oxidation, using a honeycomb ceramic or metal carrier coated with a precious metal catalyst to form the catalytic core, leveraging its high specific surface area to promote the contact reaction between carbon monoxide and oxygen. These devices can effectively convert carbon monoxide into carbon dioxide in the initial stages of use, with a catalytic efficiency exceeding 95%. However, long-term operational experience has revealed that the unique high-dust environment of mines significantly impacts the catalytic device. Coal dust, rock powder, and other particles gradually accumulate on the surface of the catalytic core, forming a dense covering layer that obstructs gas diffusion channels, leading to a continuous reduction in the effective catalytic area. Test data shows that in working environments with dust concentrations exceeding 50 mg / m³, the catalytic efficiency may drop below 70% after three months of use.

[0003] The root cause of this technological defect lies in the insufficient adaptability of the filter structure design in existing purifiers to the special working conditions of mines. Although the surface of the catalyst core is hydrophobically treated, it is still prone to electrostatic adsorption in the high-humidity mine environment, and micron-sized dust particles continue to accumulate under Brownian motion. Existing self-cleaning devices mostly rely on periodic reverse airflow rinsing, but this fails to effectively solve the problem of dust accumulation embedded in the catalyst micropores. Excessive airflow actually accelerates the mechanical wear of the catalyst coating. Utility Model Content

[0004] The purpose of this application is to overcome at least one deficiency of the existing technology and provide a high-efficiency filter element structure for a mining carbon monoxide purifier. This filter element structure achieves coordinated operation of gas purification and online cleaning of the catalytic unit through modular design, enabling the purifier to operate continuously without interruption.

[0005] To achieve the above objectives, this application discloses a high-efficiency filter element structure for a mining carbon monoxide purifier. The filter element structure uses a cylindrical sealed shell as the main structure, with flange-type air inlet and exhaust ports at both ends. Inside, a graded filtration module, a flow control module, and a catalytic reaction module are integrated sequentially along the gas flow direction. Each module is connected by a sealed transition structure to ensure the continuity of the gas path.

[0006] Furthermore, the tiered filtration module consists of a gradient-distributed composite metal filter layer, including a coarse-efficiency perforated metal plate layer, a medium-efficiency metal wire mesh layer, and a high-efficiency sintered metal fiber layer. Each filter layer is installed in a stepped manner, with the pore size decreasing sequentially along the airflow direction, forming a progressive interception mechanism from coarse to fine filtration. This effectively removes large-diameter particles and suspended impurities from the gas, reducing the dust load on subsequent catalytic units.

[0007] Furthermore, the diversion control module consists of a main airflow channel, a first branch channel, a second branch channel, and an electromagnetic switching valve assembly. The inlet end of the main airflow channel is connected to the outlet end of the staged filtration module via a flange-type sealing structure, and the inner wall of the main airflow channel is equipped with guide ribs to optimize the uniformity of airflow distribution. The electromagnetic switching valve assembly is integrated at the bifurcation of the main airflow channel, and the valve core is driven by a bistable electromagnetic actuator to achieve directional switching between the main channel and the first or second branch channel.

[0008] Furthermore, the outlet ends of each branch channel are connected to the catalytic reaction module via bellows compensators to compensate for the thermal expansion effect.

[0009] Furthermore, the catalytic reaction module contains two independently operating catalytic reaction chambers, separated by a high-temperature resistant alloy partition to form independent airtight cavities.

[0010] Furthermore, each catalytic reaction chamber is equipped with a honeycomb ceramic carrier, the surface of which is coated with a palladium-platinum bimetallic catalyst layer. A spiral electric heating element is embedded inside, and closed-loop temperature control is achieved through a temperature sensor. The inlet of the catalytic reaction chamber is rigidly connected to the corresponding branch channel via a flange interface, and the outlet is equipped with a three-way control valve assembly. This valve assembly has a dual-position switching function: the first position connects the catalytic reaction chamber to the exhaust channel, and the second position connects the catalytic reaction chamber to the cleaning channel. The catalytic reaction chamber is equipped with a self-sealing cleaning interface, which is connected to an external water supply pipeline via a quick-release clamp.

[0011] Furthermore, a cleaning control module is installed outside the casing. Specifically, the cleaning control module realizes the online cleaning function of the catalytic reaction chamber through a linkage control system. When a catalytic reaction chamber needs cleaning, the following coordinated operations are performed: the electromagnetic switching valve group cuts off the airflow input of the corresponding branch channel, the three-way control valve group synchronously switches to the cleaning channel position, and at the same time, the electric regulating valve of the external water supply pipeline opens and starts the high-pressure water pump. The cleaning water flows through the honeycomb structure inside the catalytic reaction chamber to remove dirt from the catalyst surface, and the wastewater is discharged through the cleaning channel. During this period, the other catalytic reaction chamber maintains normal operation, ensuring continuous operation of the purification process.

[0012] Furthermore, the device housing is equipped with a double-layer observation window structure at the corresponding position of the catalytic reaction chamber.

[0013] Furthermore, the outer layer of the double-layered observation window is made of explosion-proof tempered glass, while the inner layer is made of high-temperature resistant quartz glass. An inert gas is filled between the two layers, and a humidity sensor is installed. A high-temperature sealing ring ensures an airtight connection between the observation window and the housing, facilitating real-time monitoring of the catalytic reaction status and cleaning effectiveness. This integrated design significantly improves the maintenance efficiency of the catalytic unit and the overall service life of the device while ensuring the reliability of equipment operation.

[0014] Compared with the prior art, this application has at least one of the following beneficial technical effects:

[0015] 1. Enable parallel operation of cleanup work and equipment maintenance to ensure the continuity of mine operations;

[0016] 2. The dual-catalytic reaction chamber synergistic working mode effectively improves the catalytic conversion efficiency of carbon monoxide, and the precise control of catalyst surface temperature enhances reaction activity;

[0017] 3. The sealed online cleaning function avoids equipment downtime for maintenance and significantly reduces catalyst deactivation rate;

[0018] 4. Modular multi-stage filtration structure reduces gas pretreatment load and extends catalyst life;

[0019] 5. The integrated observation window and explosion-proof structural design enhance the visual monitoring capabilities and safety of the equipment's operating status;

[0020] The beneficial effects listed above are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementation methods will be further disclosed in the embodiments or other descriptive sections of this application. Attached Figure Description

[0021] A better understanding of various aspects of this disclosure will be achieved by reading the following detailed description in conjunction with the accompanying drawings. The positions, dimensions, and extents of the structures shown in the drawings, etc., do not always represent actual positions, dimensions, and extents. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of one embodiment disclosed in this application.

[0023] Figure 2 This is a schematic diagram of the internal structure of one embodiment disclosed in this application. This schematic diagram is not an actual engineering drawing, but is only used to illustrate the position and fit of the internal structure. Detailed Implementation

[0024] The present disclosure will now be described with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure more complete and to fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.

[0025] It should be understood that the same reference numerals denote the same elements in all the accompanying drawings. For clarity, the dimensions of certain features may be modified in the drawings.

[0026] It should be understood that the terminology used in this specification is for describing specific embodiments only and is not intended to limit this disclosure. All terms used in this specification (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. For the sake of brevity and / or clarity, techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail; however, where appropriate, such techniques, methods, and apparatus should be considered part of this specification.

[0027] Unless otherwise specified, the singular forms “a,” “the,” and “the” used in this specification include the plural forms. The terms “comprising,” “including,” and “containing” used in this specification indicate the presence of the claimed feature but do not exclude the presence of one or more other features. The term “and / or” used in this specification includes any and all combinations of one or more of the relevant listed items.

[0028] See attached document Figure 1 and 2 This embodiment provides a high-efficiency filter element structure for a mining carbon monoxide purifier, with a cylindrical sealed shell 1 as the main structure. The shell 1 is forged from a corrosion-resistant, high-strength alloy material, possessing excellent sealing performance and mechanical strength to adapt to the complex and harsh working environment underground, ensuring long-term stable operation of the equipment. Those skilled in the art will understand that the selection of such alloy materials and forging processes fall within the scope of existing technology and can be rationally selected according to specific working conditions.

[0029] One end of the housing 1 is welded with a flange-type air inlet 2, and the other end is correspondingly equipped with a flange-type exhaust 3. Both flange interfaces are precision-machined to ensure flatness and sealing, facilitating quick and reliable connection to the mine ventilation duct system and enabling efficient gas introduction and exhaust. It should be noted that the specific dimensions and sealing structure design of the flange connection can be determined with reference to relevant standards and conventional techniques in this field.

[0030] Inside the housing 1, a graded filtration module 4, a flow control module 5, and a catalytic reaction module 6 are integrated in an orderly manner along the predetermined gas flow direction. The modules are tightly connected via a carefully designed sealing transition structure, such as using multi-layer flexible graphite gaskets combined with clamping bolts, effectively preventing gas leakage and ensuring the continuity and stability of the gas path. Those skilled in the art will understand that the design principles and material selection criteria of the sealing transition structure are well-known technologies and can be optimized and adjusted according to actual pressure, temperature, and other parameters.

[0031] Furthermore, the graded filtration module 4 consists of a gradient-distributed composite metal filter layer, including a coarse-efficiency perforated metal plate layer, a medium-efficiency metal mesh layer, and a high-efficiency sintered metal fiber layer. The coarse-efficiency perforated metal plate layer is made of stainless steel with a certain strength and toughness, processed through precision punching, resulting in relatively large pore sizes. It is primarily responsible for intercepting large-diameter particles in the gas, such as ore dust. The medium-efficiency metal mesh layer uses a high-precision weaving process, employing copper or alloy wire as raw materials to form a dense mesh structure, further filtering medium-diameter suspended impurities. The high-efficiency sintered metal fiber layer is formed by high-temperature sintering of metal fibers, possessing a large specific surface area and a complex microporous structure, enabling fine filtration of tiny particles in the gas. The filter layers are installed in a stepped manner, cleverly utilizing spatial layout to ensure that the filter pore size decreases sequentially along the airflow direction, forming a step-by-step interception mechanism from coarse to fine filtration. It should be noted that the specific processing parameters of the metal filter layer, such as the punch size, wire mesh count, and fiber diameter, can be precisely controlled according to conventional technical means in this field to meet the filtration accuracy requirements of different mining scenarios.

[0032] The diversion control module 5 mainly includes a main airflow channel 501, a first branch channel 502, a second branch channel 503, and an electromagnetic switching valve assembly 504. The inlet end of the main airflow channel 501 is tightly connected to the outlet end of the staged filtration module 4 via a flange-type sealing structure. This flange connection also uses high-quality sealing gaskets and evenly distributed bolts for tightening, ensuring sealed gas transmission. The inner wall of the channel is carefully designed with guide ribs 505, made of corrosion-resistant engineering plastic and integrally molded. The direction of the ribs 505 matches the airflow direction, effectively guiding the gas and optimizing the uniformity of airflow distribution. The electromagnetic switching valve assembly 504 is integrated and installed at the bifurcation of the main airflow channel 501. Its core component is a bistable electromagnetic actuator, which uses a high-performance electromagnetic coil and a stable and reliable valve core assembly. Through precise control signals, the valve core is driven to achieve directional switching between the main channel and either the first branch channel 502 or the second branch channel 503. As for the specific selection of the electromagnetic switching valve group 504 and the design of the control circuit, you can refer to the existing electromagnetic valve technology in this field and adapt it according to the actual working conditions, such as flow rate and pressure.

[0033] Each branch channel outlet is connected to the catalytic reaction module 6 via a bellows compensator. The bellows compensator is made of high-temperature and corrosion-resistant metal material, and its unique corrugated structure can effectively compensate for thermal expansion effects and alleviate pipeline stress caused by temperature changes. Those skilled in the art will understand that the selection of materials and design parameters for the bellows compensator falls within the scope of existing technology and can be rationally selected based on the equipment's operating temperature range, pressure changes, and other conditions.

[0034] The catalytic reaction module 6 is meticulously designed to include two independently operating catalytic reaction chambers 601, separated by a high-temperature resistant alloy partition to form independent, airtight cavities that do not interfere with each other. This partition possesses excellent thermal insulation and mechanical strength. Each catalytic reaction chamber 601 utilizes a honeycomb ceramic carrier 602, which is formed from high-purity ceramic raw materials through high-temperature sintering. It has a regular honeycomb-like pore structure and a large specific surface area, providing ample adhesion sites for the catalyst. Its surface is uniformly coated with a palladium-platinum bimetallic catalyst layer. It should be noted that the specific molding process of the honeycomb ceramic carrier 602 and the catalyst coating method are existing technologies in the field and can be optimized and adjusted according to actual needs to ensure the activity and stability of the catalyst.

[0035] The catalytic reaction chamber 601 is ingeniously equipped with a spiral electric heating element, which, together with a built-in temperature sensor, achieves closed-loop temperature control. The temperature control system can precisely regulate the reaction temperature. The selection and installation of the electric heating element and temperature sensor can refer to conventional electric heating and temperature control technologies in the field, and be set according to the activity temperature range of different catalysts.

[0036] The inlet of the catalytic reaction chamber 601 is rigidly connected to the corresponding branch channel via a flange interface, while the outlet is carefully equipped with a three-way control valve assembly 603, which has a dual-position switching function. One position of the three-way control valve assembly 603 is connected to the cleaning channel 605. The specific structural design and sealing technology of the three-way control valve assembly 603 can draw on existing valve manufacturing technologies in the field to ensure flexible and reliable switching and good sealing performance. The catalytic reaction chamber 601 is equipped with a self-sealing cleaning interface 604, which can be easily connected to the external water supply pipeline via a quick-release clamp, making the operation simple and quick when cleaning the interior of the catalytic reaction chamber is required.

[0037] A cleaning control module 7 is installed at a corresponding position on the outer wall of the casing 1. This module realizes the online cleaning function of the catalytic reaction chamber through a carefully designed linkage control system. It should be noted that the specific circuit design and control logic programming of the linkage control system are contents that can be implemented by those skilled in the art through conventional technical means, and can be customized according to the actual cleaning process requirements. When a certain catalytic reaction chamber 601 needs to be cleaned due to long-term operation, the linkage control system coordinates and initiates a series of collaborative operations: the electromagnetic switching valve group 504 cuts off the airflow input of the corresponding branch channel, the three-way control valve group 603 synchronously switches to the working position of the cleaning channel 605, the electric regulating valve of the external water supply pipeline opens, the high-pressure water pump starts, and the water flows smoothly into the honeycomb structure carrier 602 inside the catalytic reaction chamber 401 through the cleaning channel 605, effectively stripping the dirt attached to the catalyst surface and discharging it out of the reaction chamber with the wastewater. During this process, the other catalytic reaction chamber 601 maintains normal working status, ensuring that the purification process of the entire mine ventilation system runs continuously and uninterruptedly.

[0038] Furthermore, the housing 1 of the device features a cleverly designed double-layer observation window structure 8 positioned corresponding to the catalytic reaction chamber 601, facilitating daily monitoring and maintenance. The outer layer of the double-layer observation window 8 is made of robust explosion-proof tempered glass, while the inner layer is made of high-temperature resistant quartz glass. An inert gas is filled between the two layers, and a humidity sensor is installed. A high-temperature sealing ring ensures an airtight connection between the observation window and the housing. Those skilled in the art will understand that the selection and processing of the explosion-proof tempered glass and the high-temperature resistant quartz glass, as well as the selection of the high-temperature sealing ring, are all within the scope of existing technology and can be rationally chosen according to actual operating conditions to ensure that the performance of the observation window meets the usage requirements.

[0039] In practical applications, such as in the ventilation system of an underground coal mine, the mine-use carbon monoxide purifier is installed at a key location in the main ventilation duct, responsible for purifying harmful gases such as carbon monoxide generated during underground operations. When gas containing a high concentration of carbon monoxide flows into the purifier from the inlet, it first enters the staged filtration module 4, passing sequentially through a coarse-efficiency perforated metal plate layer, a medium-efficiency metal wire mesh layer, and a high-efficiency sintered metal fiber layer, effectively intercepting various impurities such as mine dust and debris in the gas. The purified gas then enters the diversion control module 5. The electromagnetic switching valve group 504 flexibly distributes the airflow to one of the catalytic reaction chambers 601 according to a preset program or real-time monitored gas concentration parameters. In this reaction chamber, carbon monoxide reacts with oxygen to produce carbon dioxide under the catalytic action of a palladium-platinum bimetallic catalyst, thus purifying the gas. At the same time, the other catalytic reaction chamber 601 is in standby or cleaning state. After running for a certain period of time, the catalytic reaction and cleaning operations are alternately performed by switching the various control valve groups 504 to ensure the continuity of the purification process.

[0040] Compared to traditional carbon monoxide purification equipment used in mines, the purifier in this embodiment offers significant advantages. The gradient filtration design of the staged filtration module more effectively removes impurities from the gas, reduces the risk of blockage and dust load in the catalytic reaction chamber, and extends the catalyst's lifespan. The coordinated operation of the dual reaction chambers and corresponding diversion and cleaning control modules enables online cleaning, ensuring purification effectiveness while reducing equipment downtime and improving operational efficiency and reliability. This is of paramount importance for ensuring the normal operation of mining activities and protecting the lives and health of miners.

[0041] For example, in the daily operation of a mine ventilation system, when the purification efficiency of a catalytic reaction chamber 601 decreases due to excessive dirt accumulation on the catalyst surface, traditional purification equipment often requires shutdown for overall cleaning or catalyst replacement. This not only consumes a lot of time, manpower, and resources but also causes ventilation system interruptions, affecting the normal operation of underground mining. However, the purifier in this embodiment, with the help of a cleaning control module, can perform online cleaning of the target reaction chamber 601 while ensuring the normal operation of another catalytic reaction chamber 601, quickly restoring its purification performance. The entire process requires no shutdown, greatly improving the stability and reliability of the mine ventilation system, contributing to improved mine production efficiency and safety, and possessing significant practical value and promising application prospects.

[0042] In summary, the mine carbon monoxide purifier in this embodiment, through its scientifically designed structure, carefully selected materials, and close coordination between its functional modules, ensures efficient carbon monoxide purification while achieving continuous and stable operation and convenient maintenance. It effectively solves the key technical challenges of carbon monoxide purification in mine ventilation systems, providing strong technical support for ensuring the safety of underground mining environments. Those skilled in the art should understand that, based on the above description, this embodiment can be optimized and improved using relevant known technologies or existing technologies to adapt to the specific needs of different mines, but all such improvements should fall within the protection scope of this patent.

[0043] While exemplary embodiments of this disclosure have been described, those skilled in the art will understand that various changes and modifications can be made to the exemplary embodiments of this disclosure without departing from the spirit and scope thereof. Therefore, all changes and modifications are included within the scope of protection of this disclosure as defined by the claims. This disclosure is defined by the appended claims, and equivalents of those claims are also included.

Claims

1. A high-efficiency filter element structure for a mining carbon monoxide purifier, characterized in that, The main structure employs a cylindrical, sealed shell with flanged intake and exhaust ports at both ends. Internally, a tiered filtration module, a flow control module, and a catalytic reaction module are sequentially integrated along the gas flow direction. These modules are connected by a sealed transition structure to ensure gas path continuity. The tiered filtration module consists of a gradient-distributed composite metal filter layer, including a coarse-efficiency perforated metal plate layer, a medium-efficiency metal wire mesh layer, and a high-efficiency sintered metal fiber layer. The filter layers are installed in a stepped manner, with the pore size decreasing sequentially along the airflow direction. The flow control module comprises a main airflow channel, a first branch channel, a second branch channel, and an electromagnetic switching valve assembly. The inlet of the main airflow channel is connected to the outlet of the tiered filtration module via a flanged sealing structure. The inner wall of the main airflow channel is equipped with guide ribs, and the electromagnetic switching valve assembly is integrated into the main airflow channel. At the bifurcation point, a bistable electromagnetic actuator drives the valve core to achieve directional switching between the main channel and the first or second branch channel. The catalytic reaction module contains two independently operating catalytic reaction chambers, separated by a high-temperature alloy partition to form independent airtight cavities. Each catalytic reaction chamber is equipped with a honeycomb ceramic carrier, the surface of which is coated with a palladium-platinum bimetallic catalyst layer. A spiral electric heating element is embedded inside, and closed-loop temperature control is achieved through a temperature sensor. The inlet end of the catalytic reaction chamber is rigidly connected to the corresponding branch channel through a flange interface, and the outlet end is equipped with a three-way control valve group. This valve group has a dual-position switching function: the first position connects the catalytic reaction chamber to the exhaust channel, and the second position connects the catalytic reaction chamber to the cleaning channel. The catalytic reaction chamber is equipped with a self-sealing cleaning interface, which is connected to the external water supply pipeline through a quick-release clamp.

2. The high-efficiency filter element structure for a mining carbon monoxide purifier according to claim 1, characterized in that, Each branch channel outlet is connected to the catalytic reaction module via a bellows compensator.

3. The high-efficiency filter element structure for a mining carbon monoxide purifier according to claim 1, characterized in that, A cleaning control module is installed on the outside of the housing. The cleaning control module is connected to the electromagnetic switching valve group, the three-way control valve group, the electric regulating valve of the external water supply pipeline, and the high-pressure water pump through the linkage control system.

4. The high-efficiency filter element structure for a mining carbon monoxide purifier according to claim 1, characterized in that, The device casing is equipped with a double-layer observation window structure at the corresponding position of the catalytic reaction chamber.

5. The high-efficiency filter element structure for a mining carbon monoxide purifier according to claim 4, characterized in that, The outer layer of the double-layer observation window is made of explosion-proof tempered glass, and the inner layer is made of high-temperature resistant quartz glass. The space between the two layers is filled with inert gas and a humidity sensor is installed. The observation window and the housing are connected in an airtight manner using a high-temperature sealing ring.

Images