Bulk material conveying dust suppression device

Abstract

The utility model provides a dust suppression device for bulk material conveying, which belongs to the technical field of bulk material conveying and comprises a stock bin, a belt conveyor and a bulk material hopper. The system further comprises a middle spraying unit, a tail end spraying unit, a return water collecting unit and a control unit. According to the dust suppression device for bulk material conveying, the spraying units are arranged in the middle and at the tail end of the belt conveyor to spray bulk materials, dust is wrapped by water mist to form large particles, and then the particles are settled and deposited on the conveyor and the hopper, so that flying of the dust is remarkably reduced, the working environment is improved, and the working efficiency is improved. And the influence on the health of operators is reduced. Seeping water is recycled into the water purifying tank through the backwater collecting unit, so that cyclic utilization of water resources is realized, the water resources are saved, and wastewater discharge is reduced.

Description

Technical Field

[0001] This utility model relates to the field of bulk material conveying technology, specifically to a bulk material conveying dust suppression device. Background Technology

[0002] Bulk material conveying systems are used to transport powdery or granular bulk materials and are widely used in industries such as manufacturing and mining. Dust control is a crucial aspect of bulk material conveying systems because dust can be generated during transport, causing environmental pollution and potentially posing a health threat to operators. Currently, the conventional dust collection device for bulk material conveying systems uses a fan to draw dust-laden gas into a pulse-jet baghouse dust collector. The dust is adsorbed onto the fabric bags of the dust collector, while clean air is discharged outdoors. Periodic pulse-jet technology uses high-pressure air to briefly and forcefully blow backwards into the filter media to remove dust adhering to the filter bags. The dust falls back into the dust hopper and is ultimately discharged onto the original conveyor belt system.

[0003] Although it can achieve the purpose of dust removal, it has drawbacks such as high energy consumption, high cost and noise pollution.

[0004] Therefore, there is an urgent need for a low-cost, high-efficiency bulk material conveying and dust suppression device. Utility Model Content

[0005] The purpose of this utility model is to provide a bulk material conveying and dust suppression device to solve at least one technical problem existing in the prior art.

[0006] This utility model protects a bulk material conveying and dust suppression device, including a hopper, a belt conveyor, and a bulk material hopper disposed at the end of the belt conveyor; it also includes,

[0007] A central spray unit is located in the middle of the belt conveyor and is used to spray the bulk material passing through the middle of the belt conveyor.

[0008] An end spraying unit is installed at the end of the belt conveyor in the direction of its operation, and is used to spray the bulk material during unloading; wherein the end spraying unit is located above the bulk material hopper;

[0009] A water collection unit is used to recover water seeping from the belt conveyor and the bulk material hopper into a clean water tank;

[0010] The control unit is used to control the silo, the belt conveyor, the bulk material hopper, the central spray unit, the terminal spray unit, and the return water collection unit.

[0011] Further, a preferred embodiment is that the central spray unit includes a central dust suppression water pump, a central spray water suction pipe, and a nozzle assembly; the central dust suppression water pump is located at the output port of the clean water tank; the central spray water pipe connects the output port of the clean water tank to the output port of the clean water tank; and a nozzle assembly is located at the end of the central spray water suction pipe.

[0012] The terminal spray unit includes a terminal dust suppression water pump, a terminal spray water suction pipe, and a nozzle assembly; the terminal dust suppression water pump is located at the output port of the clean water tank; the terminal spray water pipe connects the output port of the clean water tank to the output port of the clean water tank; and a nozzle assembly is located at the end of the terminal spray water suction pipe.

[0013] Furthermore, a preferred device is that the output port of the water tank is connected to the main water suction pipe; the end of the main water suction pipe is connected to the middle spray suction pipe and the end spray suction pipe respectively.

[0014] Furthermore, a preferred device is that a dust suppression water pump one and a dust suppression water pump two are installed on the main water suction pipe, wherein the dust suppression water pump one is a working water pump and the dust suppression water pump two is a standby water pump.

[0015] Furthermore, a preferred device is that the purified water tank is equipped with a level sensor for detecting the water level in the purified water tank and a temperature sensor for detecting the water temperature in the purified water tank; the level sensor and the temperature sensor are connected to the control unit.

[0016] Furthermore, a preferred device is provided with a pressure transmitter and an electric control valve on the middle spray suction pipe and the end spray suction pipe, respectively; the pressure transmitter and the electric control valve are connected to the control unit.

[0017] Furthermore, a preferred device is to provide a vibration flow aid above the discharge port of the silo.

[0018] Furthermore, a preferred device is to provide an end material sensing sensor at the end of the belt conveyor and a middle material sensing sensor at the middle of the belt conveyor.

[0019] The end bulk material sensing sensor and the middle bulk material sensing sensor are connected to the control unit.

[0020] Furthermore, a preferred device is that the nozzle assembly includes at least two nozzles.

[0021] Furthermore, a preferred device is that the number of nozzles is 10-50; the nozzles are arranged in an array.

[0022] As described above, the bulk material conveying dust suppression device of this utility model includes a hopper, a belt conveyor, and a bulk material hopper located at the end of the belt conveyor; it also includes a central spray unit located in the middle of the belt conveyor; an end spray unit located at the end of the belt conveyor according to the running direction of the belt conveyor; wherein the end spray unit is located above the bulk material hopper; a water collection unit for recovering water seeping from the belt conveyor and the bulk material hopper to a clean water tank; and a control unit for controlling the hopper, the belt conveyor, the bulk material hopper, the central spray unit, the end spray unit, and the water collection unit. This bulk material conveying dust suppression device of this utility model, by setting spray units in the middle and end of the belt conveyor to spray the bulk material, uses water mist to encapsulate dust into larger particles. These particles then settle and deposit on the conveyor and hopper, significantly reducing dust dispersion, improving the working environment, and reducing the impact on the health of operators. The water that seeps in is recycled back to the clean water tank through the water return collection unit, realizing the recycling of water resources, saving water resources, and reducing wastewater discharge. Attached Figure Description

[0023] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings and the contents of the claims, and with a more complete understanding of this invention.

[0024] In the attached diagram:

[0025] Figure 1 This is a schematic diagram of the water flow direction of a bulk material conveying and dust suppression device according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the structure of the central spray unit of a bulk material conveying and dust suppression device according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of the end spray unit of a bulk material conveying and dust suppression device according to an embodiment of the present invention.

[0028] Figure 4 This is another structural schematic diagram of the end spray unit of the bulk material conveying and dust suppression device according to an embodiment of the present invention.

[0029] The components include: 1. a central spray unit; 2. a belt conveyor; 3. a terminal spray unit; and 4. a bulk material hopper. Detailed Implementation

[0030] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0031] It should be understood that the terms "horizontal", "vertical", "upper", "lower", "top", "middle", "length", "inner", "bottom", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model.

[0032] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Example 1

[0034] The various embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0035] Figures 1-4 The overall structure of the bulk material conveying dust suppression device is described. Specifically, Figure 1 This is a schematic diagram of the water flow direction of a bulk material conveying and dust suppression device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the central spray unit of a bulk material conveying and dust suppression device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the end spray unit of a bulk material conveying and dust suppression device according to an embodiment of the present invention; Figure 4 This is another structural schematic diagram of the end spray unit of the bulk material conveying and dust suppression device according to an embodiment of the present invention.

[0036] like Figures 1-4As shown, the bulk material conveying dust suppression device includes a hopper, a belt conveyor 2, and a bulk material hopper 4 located at the end of the belt conveyor 2; it also includes a central spray unit 1 located in the middle of the belt conveyor for spraying the bulk material passing through the middle of the belt conveyor; an end spray unit 3 located at the end of the belt conveyor according to the running direction of the belt conveyor for spraying the unloading bulk material; wherein the end spray unit is located above the bulk material hopper; a water collection unit for recovering the water seeping from the belt conveyor and the bulk material hopper to a clean water tank; and a control unit for controlling the hopper, the belt conveyor, the bulk material hopper, the central spray unit, the end spray unit, and the water collection unit.

[0037] Further, a preferred device is that the central spray unit includes a central dust suppression water pump, a central spray water suction pipe, and a nozzle assembly; the central dust suppression water pump is located at the output port of the clean water tank; the central spray water pipe connects the output port of the clean water tank to the output port of the clean water tank; and a nozzle assembly is located at the end of the central spray water suction pipe.

[0038] In one embodiment of this invention, the terminal spray unit 3 includes a terminal dust suppression water pump, a terminal spray water suction pipe, and a nozzle assembly. The terminal dust suppression water pump is located at the output port of the clean water tank. The terminal spray pipe connects the output port of the clean water tank to the output port of the clean water tank. A nozzle assembly is located at the end of the terminal spray water suction pipe. In other words, the middle spray unit and the terminal spray unit can each be equipped with a separate dust suppression water pump; that is, the middle spray unit is equipped with a middle dust suppression water pump, and the terminal spray unit is equipped with a terminal dust suppression water pump, making the two systems independent.

[0039] In another embodiment of this invention, the outlet of the purified water tank is connected to the main suction pipe; the ends of the main suction pipe are connected to the middle spray suction pipe and the end spray suction pipe, respectively. A dust suppression pump one and a dust suppression pump two are installed on the main suction pipe; the dust suppression pump one is the working pump, and the dust suppression pump two is the standby pump. Alternatively, the middle and end spray units can share one dust suppression pump (in working mode) and one standby dust suppression pump.

[0040] As an improvement, the nozzle assembly includes at least two nozzles. Specifically, the number of nozzles is 10-50; the nozzles are arranged in an array.

[0041] As an improvement to this embodiment, a level sensor for detecting the water level in the purified water tank and a temperature sensor for detecting the water temperature in the purified water tank are provided in the purified water tank; the level sensor and the temperature sensor are connected to the control unit. A pressure transmitter and an electric control valve are respectively provided on the middle spray suction pipe and the end spray suction pipe; the pressure transmitter and the electric control valve are connected to the control unit. A vibration flow aid is provided above the discharge port of the hopper; an end material handling sensor is provided at the end of the belt conveyor; a middle material handling sensor is provided in the middle of the belt conveyor; the end material handling sensor and the middle material handling sensor are connected to the control unit.

[0042] In a specific embodiment of this utility model, the process of using the bulk material conveying and dust suppression device provided by this utility model for bulk material conveying and dust suppression includes:

[0043] S110. Transport the bulk material to be conveyed in the silo to the belt conveyor 2;

[0044] S120. When the bulk material is conveyed to the middle of the belt conveyor 2, the bulk material is sprayed by the middle spray unit 1. The dust in the bulk material is wrapped by the water mist and forms large dust particles, which then settle onto the belt conveyor 2.

[0045] S130. According to the running direction of the belt conveyor 2, when the bulk material is conveyed to the end of the belt conveyor 2, the bulk material falls and is unloaded into the bulk material hopper; the end spray unit 3 sprays the unloaded bulk material, and the dust in the bulk material is wrapped by water mist and forms large dust particles before settling into the bulk material hopper 4; wherein, the end spray unit is located above the bulk material hopper 4.

[0046] S140. Water seeping from the belt conveyor 2 and the bulk material hopper 4 is recycled to the clean water tank through the water return collection unit.

[0047] This utility model's bulk material conveying dust suppression device can be applied to various bulk material conveying scenarios such as coal and ore. A dust suppression water pump delivers water to nozzles, atomizing it to form a mist curtain near the nozzles. This mist effectively combines with 1-100µm dust particles, suppressing dust particles generated during production and preventing their diffusion into the working environment. The principle of water mist and dust particle combination is collision and aggregation. In the dust-generating area, water mist collides with dust particles, enveloping the dust in the water mist. The water mist is absorbed by the dust particles, causing them to grow into larger particles. These larger particles then settle due to gravity, ultimately achieving dust suppression. In practical implementation, a water collection unit further includes filtering and treating the water collected by the spray dust suppression system before reusing it for spraying, achieving water resource recycling.

[0048] This also includes installing a vibratory flow aid above the discharge port of the silo; and setting the vibration frequency of the vibratory flow aid according to the type of bulk material to be conveyed. The vibratory flow aid acts directly on the bulk material itself through vibration, helping to break up material bridging or preventing material accumulation at the discharge port, thus promoting smooth flow of material from the silo into conveying equipment, such as a belt conveyor. Automated vibratory flow aid reduces the need for manual silo cleaning, lowering labor intensity and safety risks. The vibratory flow aid can adjust its vibration frequency according to different material characteristics, making it widely applicable, including various powders and granular materials such as calcium carbonate, PVC, resin, and talc. In specific implementations, the vibratory flow aid can also be set to operate intermittently to further reduce energy consumption.

[0049] To further enhance the automation level of the bulk material conveying dust suppression device of this invention, a liquid level sensor installed in the clean water tank can be used to detect the water level in the tank. When the water level in the clean water tank is lower than a set threshold, a water pump is used to replenish the water in the tank to the set water level. Through these improvements, the water volume in the clean water tank is maintained at a suitable level to meet the water needs of the spray dust suppression system and other possible water requirements. This prevents the spray system from malfunctioning due to excessively low water levels, thus affecting the dust suppression effect. It also avoids equipment damage or system downtime caused by water shortage. Furthermore, the control unit of this invention can record water level data, replenishment frequency, and water volume. Data analysis can optimize the replenishment strategy, predict maintenance needs, and improve the system's operating efficiency.

[0050] As an improvement to this embodiment, a temperature sensor installed in the purified water tank is used to detect the water level. When the water temperature in the purified water tank is lower than the set temperature, a heating unit heats the water in the tank to the set temperature. Real-time monitoring of the water temperature by the temperature sensor allows for timely and accurate understanding of the water temperature in the tank, thereby achieving precise temperature control. When the water temperature is detected to be lower than the set threshold, the heating unit automatically starts to replenish heat in a timely manner, ensuring continuous operation of the system and stable water temperature. This ensures that the water temperature in the purified water tank is maintained at a suitable level to meet specific industrial processes or environmental requirements, such as preventing equipment damage or biological growth due to excessively low water temperatures, or maintaining a suitable water temperature to promote certain chemical reactions or biological treatment processes. Ultimately, this achieves the technical effect of improving the system's energy efficiency and operating efficiency, and reducing energy consumption by monitoring and regulating water temperature.

[0051] Further, preferably, water is pumped from the clean water tank into the central spray suction pipe by a central dust suppression water pump in the central spray unit; the water output of the nozzle assembly of the central spray unit is controlled by a pressure transmitter and an electric control valve installed on the central spray suction pipe. The nozzle assembly of the central spray unit includes two or more nozzles arranged in an array. In specific implementation, the central and terminal spray units can each be equipped with a dust suppression water pump; that is, the central spray unit is equipped with a central dust suppression water pump, and the terminal spray unit is equipped with a terminal dust suppression water pump, with the two systems operating independently. Alternatively, the central and terminal spray units can share a dust suppression water pump (in operating mode) and a standby dust suppression water pump.

[0052] Furthermore, a preferred embodiment is to install a central bulk material sensing sensor at the middle of the belt conveyor; when the central bulk material sensing sensor detects bulk material passing through the middle of the belt conveyor, it triggers the central spray unit to spray the bulk material. Similar to the central bulk material sensing sensor corresponding to the central spray unit, an end bulk material sensing sensor is installed at the end of the belt conveyor; when the end bulk material sensing sensor detects bulk material passing through the end of the belt conveyor, it triggers the end spray unit to spray the bulk material. By installing bulk material sensing sensors at the middle and end of the belt conveyor, it can be ensured that spraying is only triggered when bulk material passes through, thus reducing water waste and ensuring dust suppression only when needed. Real-time monitoring and automatic control of the sensors can improve the accuracy of dust control, reduce dust emission, and improve the working environment. Through the automatic control system, the spraying strategy can be adjusted according to the actual flow of bulk material, improving the system's response speed and adaptability.

[0053] In this invention, the control unit controls a vibration booster, a liquid level sensor, a heating unit, a water supply pump, a middle bulk material sensor, an end bulk material sensor, a pressure transmitter, and an electric control valve to achieve automated spray dust suppression for the bulk material conveying unit. An automatic control system based on a PLC (Programmable Logic Controller) can be set up. This system can not only receive signals from the liquid level sensor but also automatically control the start and stop of the water supply pump based on those signals. For the control unit, a PLC-based intelligent control system can be adopted. This system can receive sensor signals and automatically control the start and stop of the spray unit and the spray volume based on those signals to achieve precise spray control. Through IoT technology, remote monitoring of the water tank level and even remote control of the water supply pump can be achieved, improving the system's intelligence level. In specific implementation, the control unit can intelligently adjust the spray frequency and water volume based on production needs, weather forecasts (such as wind speed and direction), and dust concentration data to achieve more precise dust control. In other words, the control unit, combined with multiple sensors, enables more complex control logic.

[0054] In addition, depending on the actual application scenario and budget of the bulk dust suppression device, the control unit can also record information such as spraying events, spray volume, and environmental parameters. Through data analysis, spraying strategies can be optimized, maintenance needs can be predicted, and the system's operating efficiency can be improved. The control unit can also be set with fault diagnosis and alarm functions. When a sensor or spray unit malfunctions, the system can automatically alarm and take corresponding emergency measures.

[0055] In summary, this utility model provides a bulk material conveying dust suppression device, which conveys bulk materials to be conveyed from a silo to a belt conveyor; when the bulk materials are conveyed to the middle of the belt conveyor, the bulk materials are sprayed by a middle spray unit, and the dust in the bulk materials is enveloped by water mist and forms large dust particles before settling onto the belt conveyor; according to the running direction of the belt conveyor, when the bulk materials are conveyed to the end of the belt conveyor, the bulk materials fall and are unloaded into a bulk material hopper; the end spray unit sprays the unloading bulk materials, and the dust in the bulk materials is enveloped by water mist and forms large dust particles before settling into the bulk material hopper; wherein, the end spray unit is located above the bulk material hopper; water seeping from the belt conveyor and the bulk material hopper is recovered to a clean water tank through a water return collection unit. This invention relates to a bulk material conveying dust suppression device. By installing spray units at the middle and end of the belt conveyor, the bulk material is sprayed to form larger particles from the water mist. These particles then settle and deposit on the conveyor and hopper, significantly reducing dust dispersion, improving the working environment, and minimizing the impact on operator health. A water collection unit recovers the seeping water into a clean water tank, achieving water recycling, conserving water resources, and reducing wastewater discharge.

[0056] However, those skilled in the art should understand that various improvements can be made to the bulk material conveying and dust suppression device provided by this utility model without departing from the scope of this utility model. Therefore, the scope of protection of this utility model should be determined by the contents of the appended claims.

Claims

1. A bulk material conveying and dust suppression device, characterized in that, Includes a silo, a belt conveyor, and a bulk material hopper located at the end of the belt conveyor; also include, A central spray unit is located in the middle of the belt conveyor and is used to spray the bulk material passing through the middle of the belt conveyor. An end spraying unit is installed at the end of the belt conveyor in the direction of its operation, and is used to spray the bulk material during unloading; wherein the end spraying unit is located above the bulk material hopper; A water collection unit is used to recover water seeping from the belt conveyor and the bulk material hopper into a clean water tank; The control unit is used to control the silo, the belt conveyor, the bulk material hopper, the central spray unit, the terminal spray unit, and the return water collection unit.

2. The bulk material conveying and dust suppression device according to claim 1, characterized in that, The central spray unit includes a central dust suppression water pump, a central spray suction pipe, and a nozzle assembly; the central dust suppression water pump is located at the outlet of the clean water tank; the central spray suction pipe connects the outlet of the clean water tank to the outlet of the clean water tank; and a nozzle assembly is located at the end of the central spray suction pipe. The terminal spray unit includes a terminal dust suppression water pump, a terminal spray water suction pipe, and a nozzle assembly; the terminal dust suppression water pump is located at the output port of the clean water tank; the terminal spray water suction pipe connects the output port of the clean water tank to the output port of the clean water tank; and a nozzle assembly is located at the end of the terminal spray water suction pipe.

3. The bulk material conveying and dust suppression device according to claim 1, characterized in that, The outlet of the water tank is connected to the main water suction pipe; the end of the main water suction pipe is connected to the middle spray suction pipe and the end spray suction pipe respectively.

4. The bulk material conveying and dust suppression device according to claim 3, characterized in that, Dust suppression pump one and dust suppression pump two are installed on the main water suction pipe. Dust suppression pump one is the working pump, and dust suppression pump two is the standby pump.

5. The bulk material conveying and dust suppression device according to claim 1, characterized in that, The purified water tank is equipped with a level sensor for detecting the water level in the purified water tank and a temperature sensor for detecting the water temperature in the purified water tank; the level sensor and the temperature sensor are connected to the control unit.

6. The bulk material conveying and dust suppression device according to claim 3, characterized in that, A pressure transmitter and an electric control valve are respectively installed on the middle spray water suction pipe and the end spray water suction pipe; the pressure transmitter and the electric control valve are connected to the control unit.

7. The bulk material conveying and dust suppression device according to claim 1, characterized in that, A vibratory flow aid is installed above the discharge port of the silo.

8. The bulk material conveying and dust suppression device according to claim 1, characterized in that, An end material sensing sensor is installed at the end of the belt conveyor; a middle material sensing sensor is installed in the middle of the belt conveyor. The end bulk material sensing sensor and the middle bulk material sensing sensor are connected to the control unit.

9. The bulk material conveying and dust suppression device according to claim 2, characterized in that, The nozzle assembly includes at least two nozzles.

10. The bulk material conveying and dust suppression device according to claim 9, characterized in that, The number of nozzles is 10-50; the nozzles are arranged in an array.

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