Dust removal system for open double drum mining machine and open double drum mining machine

Abstract

The utility model discloses a kind of open-air double-drum mining machine dust removal systems, comprising: high-pressure spray nozzle, at least one high-pressure spray nozzle is set to the drum of mining machine and / or at least one high-pressure spray nozzle is set to the material receiving belt conveyor head of mining machine;Dust cover, at least one dust cover is covered on the bucket upper side of mining machine and / or at least one dust cover is covered on the upper side of crusher;Water film dust collector, dust suction port is communicated with the dust cover for removing dust from the gas sucked into the dust suction port. The open-air double-drum mining machine dust removal system can effectively solve the problem of uncontrollable water consumption of single dust removal mode. The utility model also discloses an open-air double-drum mining machine comprising the above open-air double-drum mining machine dust removal system.

Description

Technical Field

[0001] This utility model relates to the field of mining technology, and more specifically, to a dust removal system for an open-pit double-drum mining machine, and also to an open-pit double-drum mining machine including the above-mentioned dust removal system for an open-pit double-drum mining machine. Background Technology

[0002] Open-pit double-drum mining machines generate a large amount of dust at the two ends of the cutting section, the two ends of the loading section, the built-in crusher section, and the unloading section during operation. To ensure safe production, it is necessary to treat the generated dust.

[0003] The crushing and transportation of ore generates a large amount of dust, which not only pollutes the environment but also affects the physical and mental health of workers. During production, equipment produces significant amounts of dust, causing it to permeate the air and exceeding permitted concentrations. This not only impairs visibility but also poses occupational hazards. To prevent the spread of dust from production points, reduce environmental pollution, and ensure the health of workers in the production area, dust removal devices are necessary to control and purify the dust.

[0004] Currently, open-pit mining generally uses a single spray dust suppression method. This method has poor dust suppression effect, increases the moisture content of coal and damages the bottom plate, consumes a lot of water, and is prone to freezing at low temperatures. There are also methods that use chemical foam and wetting agents for dust suppression, but these can easily cause harm to people and the environment when dispersed by wind.

[0005] In conclusion, how to effectively solve the problem of uncontrollable water consumption due to a single dust removal method is an urgent issue that needs to be addressed by those skilled in the art. Utility Model Content

[0006] In view of this, the first objective of this utility model is to provide a dust removal system for an open-pit double-drum mining machine, which can effectively solve the problem of uncontrollable water consumption due to the single dust removal method. The second objective of this utility model is to provide an open-pit double-drum mining machine including the above-mentioned dust removal system.

[0007] To achieve the first objective mentioned above, this utility model provides the following technical solution:

[0008] A dust removal system for an open-pit twin-drum mining machine includes:

[0009] High-pressure spray nozzle, at least one of the high-pressure spray nozzles is disposed at the drum of the mining machine and / or at least one of the high-pressure spray nozzles is disposed at the receiving conveyor head of the mining machine;

[0010] Dust control hood, at least one of the dust control hoods is disposed on the upper side of the bucket of the mining machine and / or at least one of the dust control hoods is disposed on the upper side of the crusher;

[0011] A water film dust collector, with its dust extraction port connected to the dust control hood for removing dust from the gas drawn in through the dust extraction port.

[0012] The aforementioned dust removal system for open-pit twin-drum mining machines employs a combination of high-pressure spray dust suppression, dust control hoods, and water film dust collectors. It allows for targeted dust removal designs based on different dust-generating locations, minimizing water consumption while ensuring effective dust removal and preventing environmental pollution, while meeting the low-temperature environment requirements of open-pit mines. Therefore, this dust removal system effectively solves the problem of uncontrollable water consumption associated with single dust removal methods.

[0013] In some technical solutions, multiple high-pressure spray nozzles are all first nozzles, and multiple first nozzles are evenly arranged around the center of the roller.

[0014] In some technical solutions, seventy to ninety of the first nozzles are arranged sequentially and evenly along the edge of the roller.

[0015] In some technical solutions, the first nozzle is a high-pressure nozzle with a pressure of not less than 2.5 MPa.

[0016] In some technical solutions, the water film dust collector includes a water supply pipe, which is a constant temperature heat tracing pipe.

[0017] In some technical solutions, the water film dust collector includes a water tank, which is equipped with a heating device and a temperature detection device.

[0018] In some technical solutions, the water film dust collector includes a centrifugal pump for removing residual liquid from the water supply pipe when the water supply is stopped.

[0019] In some technical solutions, at least one of the dust control hoods is a first dust control hood, and at least one of the dust control hoods is a second dust control hood; at least one first dust control hood is installed on the upper side of the bucket of the mining machine, and at least one second dust control hood is installed on the crusher; both the first dust control hood and the second dust control hood are connected to the dust extraction port.

[0020] In some technical solutions, a guide hood is also included; at least one of the high-pressure spray nozzles is a second nozzle, which is disposed at the receiving conveyor head of the mining machine; the guide hood is disposed at the receiving conveyor head, and the second nozzle is used to spray high-pressure spray onto the inside of the guide hood.

[0021] To achieve the second objective mentioned above, this utility model also provides an open-pit double-drum mining machine. This open-pit double-drum mining machine includes any of the aforementioned dust removal systems for open-pit double-drum mining machines, and further includes drums, buckets, a crusher, a conveyor, and a receiving belt conveyor. The conveyor is connected between the head of the receiving belt conveyor and the crusher. Since the aforementioned dust removal system for open-pit double-drum mining machines has the above-mentioned technical effects, the open-pit double-drum mining machine equipped with this dust removal system should also have the corresponding technical effects. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A side view of the tracked double-drum mining machine for open-pit mines provided in this embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the top structure of an open-pit mine tracked double-drum mining machine provided for an embodiment of this utility model;

[0025] Figure 3 A schematic diagram of the end structure of an open-pit mine tracked double-drum mining machine provided in an embodiment of this utility model.

[0026] The following labels are used in the attached diagram:

[0027] First nozzle 1-1, first dust control hood 1-2, second dust control hood 1-3, water film dust collector 1-4, material guide hood 1-5;

[0028] 2-1 roller, 2-2 bucket, 2-3 crusher, 2-4 conveyor, 2-5 receiving conveyor belt. Detailed Implementation

[0029] This utility model discloses a dust removal system for an open-pit double-drum mining machine, which can effectively solve the problem of uncontrollable water consumption due to a single dust removal method.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-3 , Figure 1 A side view of the tracked double-drum mining machine for open-pit mines provided in this embodiment of the utility model; Figure 2 A schematic diagram of the top structure of an open-pit mine tracked double-drum mining machine provided for an embodiment of this utility model; Figure 3 A schematic diagram of the end structure of an open-pit mine tracked double-drum mining machine provided in an embodiment of this utility model.

[0032] In some embodiments, a dust removal system for an open-pit twin-drum mining machine is provided, which is applied to the open-pit twin-drum mining machine and mainly includes at least one high-pressure spray nozzle, at least one dust control hood and at least one water film dust collector 1-4.

[0033] High-pressure spray nozzles are nozzles used to spray high-pressure water mist. It should be noted that the dust removal system for open-pit twin-drum mining machines can be equipped with a high-pressure water pump to pressurize water in the water tank and supply it to the high-pressure spray nozzles; alternatively, the high-pressure spray nozzles can be connected to a municipal water supply system or other systems capable of providing high-pressure water to obtain high-pressure water.

[0034] In some embodiments, at least one high-pressure spray nozzle is disposed at the drum 2-1 of the mining machine and / or at the receiving conveyor head 2-5 of the mining machine. One or more high-pressure spray nozzles may be disposed only at the drum 2-1 of the mining machine to absorb dust raised at the drum 2-1; or one or more high-pressure spray nozzles may be disposed only at the receiving conveyor head 2-5 of the mining machine to absorb dust raised at the receiving conveyor head 2-5; or high-pressure spray nozzles may be disposed at both the drum 2-1 and the receiving conveyor head 2-5.

[0035] High-pressure water mist is sprayed through a high-pressure spray nozzle. The water droplets in the high-pressure water mist combine with the dust to form large particles that then fall off, gradually removing the dust that has been stirred up.

[0036] In some embodiments, a dust control hood and a water film dust collector 1-4 are used in conjunction to prevent dust removal water from entering the mineral material.

[0037] Specifically, at least one dust control hood is installed on the upper side of the bucket 2-2 of the mining machine and / or at least one dust control hood is installed on the crusher 2-3. The dust control hood may be installed only on the upper side of the bucket 2-2 of the mining machine, with the opening facing downwards, covering the upper side of the bucket 2-2, without requiring complete coverage of the bucket 2-2, as long as it can effectively extract the dust raised by the crusher 2-2 during ore handling; or the dust control hood may be installed only on the upper side of the crusher 2-3, with the opening facing downwards, covering the upper side of the crusher 2-3, without requiring complete coverage of the crusher 2-3, as long as it can effectively extract the dust raised by the crusher 2-3 during crushing; or dust control hoods may be installed at both the crusher 2-3 and the bucket 2-2. A specific dust control hood is as follows: the lower end of the dust control hood is the hood opening, and the upper end is the outlet. From bottom to top, the cross-sectional area of ​​the hood cavity gradually decreases, so that the dust entering through the hood opening is gradually collected until it exits through an outlet with an area significantly smaller than the hood opening. The hood opening can be rectangular or circular, depending on the size of the area to be covered. The shape of the opening can be the same as or different from the hood opening; for example, the hood opening can be rectangular while the opening is circular.

[0038] The dust extraction port of the water film dust collector 1-4 is connected to the dust control hood to remove dust from the gas drawn in through the extraction port. A specific water film dust collector 1-4 mainly includes a dust extraction channel and a water supply system. The dust extraction fan in the dust extraction channel generates suction to allow the dust-laden air entering through the extraction port to enter the separation chamber. In the separation chamber, the nozzles of the water supply system spray water mist or water film to adsorb the dust in the air. The water supply system is equipped with a water pump, a water tank, and water supply pipelines.

[0039] By combining dust control hoods and water film dust collectors 1-4, dust removal is achieved, resulting in good dust removal efficiency and preventing the generated mud and water from mixing into the ore.

[0040] In some embodiments, a dust removal system for an open-pit twin-drum mining machine is provided, employing a combination of high-pressure spray dust suppression, dust control hoods, and water film dust collectors. This allows for targeted dust removal design based on different dust-generating locations, minimizing water consumption while ensuring effective dust removal and avoiding environmental pollution, thus meeting the low-temperature environment requirements of open-pit mines. Therefore, this dust removal system for an open-pit twin-drum mining machine effectively solves the problem of uncontrollable water consumption from a single dust removal method.

[0041] In some embodiments, the multiple high-pressure spray nozzles can all be first nozzles 1-1, and the multiple first nozzles 1-1 are evenly arranged around the center of the drum 2-1 to serve as a dust control device for the drum 2-1. The drum 2-1 is used to cut into the coal wall during operation, thus generating a large amount of dust. Since it is difficult to form a closed environment at the working area of ​​the drum 2-1, multiple high-pressure nozzles can be evenly arranged around the center of the drum 2-1 to capture, intercept, and extinguish the dust generated in the central area.

[0042] In some embodiments, seventy to ninety first nozzles 1-1 are arranged sequentially and evenly along the edge of the roller 2-1, preferably eighty first nozzles 1-1. This dense arrangement of high-pressure spray nozzles along the edge of the roller 2-1 creates a dense water mist network, resulting in better dust removal. Of course, in other examples, the number of first nozzles 1-1 may be less than seventy or more than ninety. The center of the roller 2-1 refers to its axis of rotation, and the edge of the roller 2-1 refers to its radially outer portion, i.e., arranged around the center of the roller 2-1.

[0043] In some embodiments, the first nozzle 1-1 can be a high-pressure nozzle with a pressure of not less than 2.5 MPa, so as to achieve high atomization pressure, small spray particles, and rapid flow velocity, far exceeding the dust dispersion speed, so as to more accurately and effectively capture, intercept, and extinguish dust. Its moisture content is extremely low, achieving excellent dust control effects at the source without increasing the moisture content of the sand and gravel. For example, in some specific applications, the moisture gain ratio of the material can be 0.02% to 0.05%, which is almost negligible.

[0044] High-pressure spray nozzles offer advantages such as low equipment investment, compact footprint, and extremely low energy consumption. In some applications, high-pressure spray devices can reduce hourly water consumption to less than 20% of traditional low-pressure spray dust suppression, achieving energy-saving and environmentally friendly results.

[0045] In some embodiments, the water supply pipe of the water film dust collector 1-4 can be a constant temperature heating pipe to prevent freezing in winter. The constant temperature heating pipe may be an electric heating wire wound around or running parallel to the water pipe to heat the water pipe when it is turned on, so as to prevent the water in the water pipe from freezing.

[0046] In some embodiments, the water tank of the water film dust collector 1-4 may be equipped with a heating device and a temperature detection device. During application, the heating device can be turned on according to the temperature detected by the temperature detection device, so that the water temperature is not lower than 5 degrees Celsius to avoid freezing.

[0047] In some embodiments, the water pump of the water film dust collector 1-4 can be a centrifugal pump, used to remove residual liquid from the water supply pipe when the water supply is stopped, so that the water supply pipe contains only gas, thereby preventing freezing. Of course, the nozzles connected to the water supply pipe can also have liquid sucked away, containing only gas, thus preventing freezing. Generally, a water valve is installed between the centrifugal pump and the water tank, so that when the water valve is closed, the centrifugal pump starts, which can suck away water from the water supply pipe and its connected nozzles to prevent residual water from freezing.

[0048] Of course, in some embodiments, to avoid freezing, other parts of the water film dust collector 1-4 may also be subjected to antifreeze treatment, and / or other forms of antifreeze treatment may be applied to the aforementioned related structures of the water film dust collector 1-4. The water film dust collector 1-4 can be directly installed on the open-air double-drum 2-1 mining machine.

[0049] In some embodiments, at least one of the dust control hoods is a first dust control hood 1-2, and at least one of the dust control hoods is a second dust control hood 1-3; at least one first dust control hood 1-2 is disposed on the upper side of the bucket 2-2 of the mining machine and / or at least one second dust control hood 1-3 is disposed on the crusher 2-3; both the first dust control hood 1-2 and the second dust control hood 1-3 are connected to the dust extraction port to share a water film dust collector 1-4.

[0050] Alternatively, a single dust cover can be used to cover both the upper side of bucket 2-2 and the upper side of crusher 2-3.

[0051] The first dust control hood 1-2 and the water film dust collector 1-4 are combined to form the dust control device for the bucket 2-2.

[0052] The second dust control hood 1-3 and the water film dust collector 1-4 are combined to form the dust control device for the crusher 2-3, wherein the crusher 2-3 is generally a hammer crusher 2-3.

[0053] In some embodiments, the system further includes a guide shroud 1-5; at least one high-pressure spray nozzle is a second nozzle, wherein the second nozzle is disposed at the head of the receiving conveyor belt 2-5 of the mining machine; and the guide shroud 1-5 is disposed at the head of the receiving conveyor belt 2-5, the second nozzle being used to spray high-pressure spray onto the inner side of the guide shroud 1-5, thereby suppressing dust through the combination of the second nozzle and the guide shroud 1-5. The high-pressure spray nozzle has high pressure, small atomized particles, fast flow rate, low moisture content, and a good angle, thus achieving good dust suppression. Simultaneously, the high-pressure atomization technology of the high-pressure spray nozzle does not affect the moisture content, production capacity, or quality of the ore. The guide shroud 1-5 also prevents material from flying out.

[0054] It should be noted that the open-pit double-drum 2-1 mining machine can also be equipped with a conveyor 2-4, which connects between the crusher 2-3 and the head of the receiving conveyor belt 2-5. The inlet of the conveyor 2-4 docks with the crusher to transport the ore crushed by the crusher 2-3 to the upper part of the head of the receiving conveyor belt 2-5, where it is thrown out and falls onto the head of the receiving conveyor belt 2-5. During the fall, the ore is prone to flying out, and the guide cover 1-5 is installed at the junction of the head of the receiving conveyor belt 2-5 and the outlet of the conveyor 2-4 to prevent the ore from flying out.

[0055] Based on the dust removal system for open-pit double-drum mining machines provided in the above embodiments, this utility model also provides an open-pit double-drum 2-1 mining machine, which includes any one of the dust removal systems for open-pit double-drum mining machines in the above embodiments. Since this open-pit double-drum 2-1 mining machine uses the dust removal system for open-pit double-drum mining machines in the above embodiments, the beneficial effects of this open-pit double-drum 2-1 mining machine can be found in the above embodiments.

[0056] At least one of the high-pressure spray nozzles of the dust removal system for the open-pit twin-drum mining machine is disposed at the drum 2-1 of the mining machine and / or at least one of the high-pressure spray nozzles is disposed at the head of the receiving conveyor belt 2-5 of the mining machine; at least one of the dust control hoods of the dust removal system for the open-pit twin-drum mining machine is disposed on the upper side of the bucket 2-2 of the mining machine and / or at least one of the dust control hoods is disposed on the upper side of the crusher 2-3.

[0057] In some embodiments, an open-pit double-drum 2-1 mining machine is provided with a conical drum 2-1 cutting system arranged on one side of the machine body, including two drums 2-1 arranged in front and behind. The drums 2-1 can be raised and lowered. During cutting, the front drum 2-1 is raised to cut the top coal, and the rear drum 2-1 is lowered to cut the bottom coal.

[0058] Each rear of the machine body is equipped with a set of material receiving, crushing, and transfer devices, as well as an auxiliary crushing device, specifically including a bucket 2-2, a crusher 2-3, a conveyor 2-4, and an auxiliary crushing device. The bucket 2-2 can use a star wheel shovel for material receiving, which has high loading efficiency. The bucket 2-2 can be raised and lowered by a lifting cylinder to adapt to working, traveling, and terrain undulations.

[0059] The conveyor 2-4 (specifically, a scraper conveyor 2-4) is fixed to the frame in the middle of the machine body. One end is connected to the bucket 2-2 to achieve continuous material collection and transportation, while the other end is the unloading end, unloading the minerals onto the receiving belt conveyor 2-5 (belt conveyor 2-4). A crusher 2-3 (hammer crusher or single-tooth roller crusher) is arranged in front of the conveyor 2-4 and after the bucket 2-2. The height of the crusher 2-3 is adjustable to accommodate the different particle size requirements of various minerals.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dust removal system for an open-pit double-drum mining machine, characterized in that, include: High-pressure spray nozzle, at least one of the high-pressure spray nozzles is disposed at the drum (2-1) of the mining machine and / or at least one of the high-pressure spray nozzles is disposed at the head of the receiving conveyor belt (2-5) of the mining machine; Dust control hood, at least one of the dust control hoods is provided on the upper side of the bucket (2-2) of the mining machine and / or at least one of the dust control hoods is provided on the upper side of the crusher (2-3); A water film dust collector (1-4) has a dust extraction port connected to the dust control hood for removing dust from the gas drawn in through the dust extraction port.

2. The dust removal system for open-pit twin-drum mining machines according to claim 1, characterized in that, The multiple high-pressure spray nozzles are all first nozzles (1-1), and the multiple first nozzles (1-1) are evenly arranged around the center of the roller (2-1).

3. The dust removal system for open-pit double-drum mining machines according to claim 2, characterized in that, Seventy to ninety of the first nozzles (1-1) are arranged evenly along the edge of the roller (2-1).

4. The dust removal system for open-pit twin-drum mining machines according to claim 3, characterized in that, The first nozzle (1-1) is a high-pressure nozzle with a pressure of not less than 2.5 MPa.

5. The dust removal system for an open-pit twin-drum mining machine according to any one of claims 1-4, characterized in that, The water film dust collector (1-4) includes a water supply pipe, which is a constant temperature heat tracing pipe.

6. The dust removal system for an open-pit twin-drum mining machine according to claim 5, characterized in that, The water film dust collector (1-4) includes a water tank, which is equipped with a heating device and a temperature detection device.

7. The dust removal system for an open-pit twin-drum mining machine according to claim 6, characterized in that, The water film dust collector (1-4) includes a centrifugal pump for removing residual liquid from the water supply pipe when the water supply is stopped.

8. The dust removal system for an open-pit twin-drum mining machine according to claim 1, characterized in that, At least one of the dust control hoods is a first dust control hood (1-2), and at least one of the dust control hoods is a second dust control hood (1-3); at least one first dust control hood (1-2) is installed on the upper side of the bucket (2-2) of the mining machine, and at least one second dust control hood (1-3) is installed on the crusher (2-3); both the first dust control hood (1-2) and the second dust control hood (1-3) are connected to the dust extraction port.

9. The dust removal system for an open-pit twin-drum mining machine according to any one of claims 1-4, characterized in that, It also includes a material guide cover (1-5); at least one of the high-pressure spray nozzles is a second nozzle, the second nozzle being disposed at the head of the receiving conveyor belt (2-5) of the mining machine; the material guide cover (1-5) is disposed at the head of the receiving conveyor belt (2-5), and the second nozzle is used to spray high-pressure spray onto the inside of the material guide cover (1-5).

10. An open-pit double-drum (2-1) mining machine, comprising a drum (2-1), a bucket (2-2), a crusher (2-3), a conveyor (2-4), and a receiving belt conveyor (2-5), wherein the conveyor (2-4) is connected between the head of the receiving belt conveyor (2-5) and the crusher (2-3), characterized in that, Including the dust removal system for open-pit twin-drum mining machines as described in any one of claims 1-9.

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