Pit dust removal system and method using fog cannon machine

Abstract

The application provides a pit dust removal system and method using fog gun machines, multiple fog gun machines and dust degree sensors installed in multiple areas in the pit; for each dust degree sensor, the dust degree sensor is used to collect the dust degree concentration of a first area and send it to a PLC controller; the PLC controller is used to control the corresponding first fog gun machine to start or stop according to the dust degree concentration. By using the fog gun machine for dust removal, dust particles can be efficiently adsorbed and caused to settle, and dust can be efficiently removed and energy and water can be saved; in addition, the system controls multiple fog gun machines in different areas, sends the dust degree concentration detected by the dust degree sensor of each area to the PLC controller, and controls the start or stop of the fog gun machines in each area through the PLC controller, so that flexible start or stop of dust removal in different areas can be realized, and then maintenance personnel can easily enter the pit to maintain the equipment, dust return can be prevented, and product quality can be improved.

Description

Technical Field

[0001] This invention relates to the field of pit dust removal technology, and in particular to a pit dust removal system and method using a mist cannon. Background Technology

[0002] In the glass manufacturing industry or some other industries, defective products are usually crushed by a crusher and fall onto a conveyor belt in a pit below the production line. The conveyor belt then transports the products to other locations. The process of the crushed products falling onto the conveyor belt generates a lot of dust. Since the pit is usually a closed space with no air circulation, a large amount of dust accumulates in the pit. This makes it inconvenient for maintenance personnel to enter the pit to repair the equipment. The dust accumulated in the pit can also return to the production line or electrical cabinet through the crusher, cable trays, etc., which are connected to the production line, thus affecting the quality of the products. Summary of the Invention

[0003] The purpose of this invention is to provide a pit dust removal system and method using a fog cannon, so as to facilitate maintenance personnel to enter the pit to maintain equipment, while preventing dust from rising back up, thereby improving product quality.

[0004] This invention provides a pit dust removal system using mist cannons. The system includes: multiple mist cannons installed in multiple areas of the pit, each mist cannon having a dust concentration sensor installed at a preset position; each dust concentration sensor is communicatively connected to a PLC controller; for each dust concentration sensor, the dust concentration sensor is used to collect the dust concentration of the corresponding first area and send the dust concentration to the PLC controller; the PLC controller is used to control the first mist cannon corresponding to the dust concentration sensor to start or stop according to the dust concentration; wherein, when the first mist cannon is started, the first mist cannon is used to spray water mist to remove dust from the first area.

[0005] Furthermore, the PLC controller is also used to: obtain the upper limit and lower limit of dust level corresponding to the first area; compare the dust level concentration with the upper limit and lower limit of dust level respectively to obtain the comparison result; and control the first fog cannon machine corresponding to the dust level sensor to start or stop according to the comparison result.

[0006] Furthermore, the PLC controller is also used to: if the comparison result indicates that the dust concentration is greater than the upper limit of the dust concentration, control the first fog cannon corresponding to the dust sensor to start, and spray water mist through the first fog cannon to remove dust from the first area; if the comparison result indicates that the dust concentration is less than the lower limit of the dust concentration, control the first fog cannon corresponding to the dust sensor to stop, so as to stop removing dust from the first area.

[0007] Furthermore, multiple fog cannons were evenly distributed on both sides of the pit.

[0008] Furthermore, the system also includes a display screen; the display screen is connected to the PLC controller; a switch is installed on the display screen; the switch is used to control the pit dust removal system to be in automatic or manual working mode.

[0009] Furthermore, the PLC controller is also used to: when the pit dust removal system is in automatic working mode, control the first fog cannon corresponding to the dust concentration sensor to start or stop according to the dust concentration.

[0010] Furthermore, when the pit dust removal system is in manual operation mode, each fog cannon is also configured to: start operation according to the start command if an start command is received; and stop operation according to the stop command if a stop command is received.

[0011] Furthermore, the display screen is also used to: display the dust concentration of the corresponding area collected by each dust sensor, as well as the upper limit and lower limit of dust concentration for each corresponding area.

[0012] Furthermore, the display screen is also used to display the operating indicator lights corresponding to each fog cannon.

[0013] This invention provides a method for dust removal in a pit using a mist cannon, the method operating within any of the aforementioned pit dust removal systems using mist cannons; the pit dust removal system includes: multiple mist cannons installed in multiple areas within the pit, each mist cannon having a dust level sensor installed at a preset position; each dust level sensor is communicatively connected to a PLC controller; the method includes: for each dust level sensor, the dust level sensor collects the dust concentration of a corresponding first area and sends the dust concentration to the PLC controller; the PLC controller controls the first mist cannon corresponding to the dust level sensor to start or stop according to the dust concentration; wherein, when the first mist cannon is started, the first mist cannon is used to spray water mist to remove dust from the first area.

[0014] The present invention provides a pit dust removal system and method using mist cannons. The system includes: multiple mist cannons installed in multiple areas of the pit, each mist cannon having a dust level sensor installed at a preset position; each dust level sensor is communicatively connected to a PLC controller; for each dust level sensor, the dust level sensor is used to collect the dust concentration of the corresponding first area and send the dust concentration to the PLC controller; the PLC controller is used to control the first mist cannon corresponding to the dust level sensor to start or stop according to the dust concentration; wherein, when the first mist cannon is started, the first mist cannon is used to spray water mist to remove dust from the first area. By using mist cannons for dust removal, dust particles can be efficiently adsorbed and promoted to settle, resulting in efficient dust reduction and energy and water conservation. In addition, the system can control multiple mist cannons in different areas. By sending the dust concentration detected by the dust level sensor in each area to the PLC controller, the PLC controller can control the start or stop of the mist cannons in each area. This allows for flexible start or stop of dust removal in different areas, making it easier for maintenance personnel to enter the pit to repair the equipment, while preventing dust from rising back up and improving product quality. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a pit dust removal system using a fog cannon, provided as an embodiment of the present invention. Figure 2 A schematic diagram of an internal symbol table of a PLC program provided for an embodiment of the present invention; Figure 3 A schematic diagram of a program segment for displaying real-time dust concentration using a dust sensor, provided in an embodiment of the present invention; Figure 4 A schematic diagram of another pit dust removal system using a fog cannon provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the electrical layout of a pit dust removal system provided in an embodiment of the present invention; Figure 6 A schematic diagram of a program segment for controlling a fog cannon is provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of a program segment in an automatic working mode provided by an embodiment of the present invention; Figure 8A schematic diagram of a display interface provided in an embodiment of the present invention; Figure 9 A flowchart illustrating a method for dust removal in a pit using a fog cannon, provided as an embodiment of the present invention. Detailed Implementation

[0017] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In related technologies, the lack of effective pit dust removal methods leads to a large accumulation of dust in the pit, making it inconvenient for maintenance personnel to enter the pit to repair equipment. The dust accumulated in the pit will also return to the production line or electrical cabinet through crushers, cable trays, etc., which are connected to the production line, thus affecting product quality. Based on this, this invention provides a pit dust removal system using a mist cannon. This technology can be applied to scenarios where dust in the pit below the production line needs to be treated.

[0019] To facilitate understanding of this embodiment, a dust suppression system for a pit using a fog cannon, as disclosed in this embodiment of the invention, will first be introduced. Figure 1 As shown, the system includes: multiple fog cannons 10 installed in multiple areas of the pit, and a dust sensor 11 installed at a preset position on each fog cannon 10; each dust sensor 11 is communicatively connected to a PLC controller 12; the fog cannon 10 is an environmental protection device that atomizes water into micron-sized particles through high-pressure spraying and uses a fan to spray it from a distance to adsorb and settle dust in the air; the preset positions are usually locations close to the fog cannon 10, such as the upper, lower, left, and right sides of the fog cannon 10; in actual implementation, multiple fog cannons 10 can be installed in multiple areas according to the size of the pit space, and the number of fog cannons 10 can be set according to actual needs, with a dust sensor 11 installed near each fog cannon.

[0020] For each dust level sensor 11, the dust level sensor 11 is used to collect the dust level concentration of the corresponding first area and send the dust level concentration to the PLC controller 12; the PLC controller 12 is used to control the first fog cannon machine corresponding to the dust level sensor 11 to start or stop according to the dust level concentration; wherein, when the first fog cannon machine is started, the first fog cannon machine is used to spray water mist to remove dust from the first area.

[0021] The first areas corresponding to any two adjacent dust level sensors 11 may or may not overlap, depending on the effective collection area of ​​each dust level sensor 11 and the installation distance between two adjacent dust level sensors 11. In actual implementation, since multiple fog cannons 10 are distributed in multiple areas of the pit, each dust level sensor 11 can collect the dust concentration in the pit by area. Specifically, for each dust level sensor 11, the dust level sensor 11 can collect the dust concentration of the corresponding first area and send it to the PLC controller 12. The PLC controller 12 can perform logical operations based on the dust concentration to control the start or stop of the corresponding first fog cannon. For example, if the dust concentration is higher than the preset dust level threshold, the first fog cannon can be started, and the first fog cannon can remove dust by spraying water mist in the first area. If the dust concentration is lower than the dust level threshold, the first fog cannon can be stopped.

[0022] like Figure 2 The diagram shown illustrates an internal symbol table for a PLC program, illustrating the addresses corresponding to different symbols; for example... Figure 3 The diagram shows a program segment for displaying real-time dust concentration using a dust sensor. It includes six analog input modules, each corresponding to one of the six dust sensors. Taking the first analog input module as an example, AIW16 is channel 1 of the AI ​​module, used to connect to the 4-20mA signal from the dust sensor corresponding to the #1 fog cannon. VD8 and VD12 are the upper and lower range values ​​of the dust sensor set on the display screen, such as a range of 0-100, meaning the dust concentration the sensor can detect is 1-100 ug / m³. VD16 represents the calculated real-time dust concentration, such as 18 ug / m³. The dust sensor's range is known to be 0-20 kiloparticles / liter, corresponding to digital signals 5530-65536 in the PLC controller. The other analog input modules operate on the same principle as the first analog input module and will not be described further.

[0023] The aforementioned pit dust removal system using mist cannons can efficiently adsorb dust particles and promote their settling, achieving efficient dust reduction and saving energy and water. Furthermore, the system allows for zoned control of multiple mist cannons. By sending dust concentration data detected by dust level sensors in each zone to a PLC controller, the PLC controller can control the start or stop of the mist cannons in each zone. This allows for flexible start / stop of dust removal in different zones, facilitating access for maintenance personnel to repair equipment in the pit, preventing dust from rising back up, and improving product quality.

[0024] Furthermore, the PLC controller is also used to: obtain the upper limit and lower limit of dust level corresponding to the first area; compare the dust level concentration with the upper limit and lower limit of dust level respectively to obtain the comparison result; and control the first fog cannon machine corresponding to the dust level sensor to start or stop according to the comparison result.

[0025] The upper limit of dust concentration in the first area corresponding to different dust concentration sensors can be the same or different, and the lower limit of dust concentration in the first area corresponding to different dust concentration sensors can also be the same or different. The specific settings can be made according to actual needs and are not limited here. In actual implementation, for each dust concentration sensor, when the PLC controller receives the dust concentration of the first area collected by the dust concentration sensor, it can first obtain the upper limit and lower limit of dust concentration corresponding to the first area, and compare the received dust concentration with the upper limit and lower limit of dust concentration respectively, so as to control the corresponding first fog cannon to start or stop according to the comparison result.

[0026] Furthermore, the PLC controller is also used to: if the comparison result indicates that the dust concentration is greater than the upper limit of the dust concentration, control the first fog cannon corresponding to the dust sensor to start, and spray water mist through the first fog cannon to remove dust from the first area; if the comparison result indicates that the dust concentration is less than the lower limit of the dust concentration, control the first fog cannon corresponding to the dust sensor to stop, so as to stop removing dust from the first area.

[0027] In practical implementation, when the PLC controller confirms that the dust concentration is greater than the upper limit of dust concentration based on the comparison result, it can be considered that the dust concentration in the first area is relatively high. At this time, the corresponding first mist cannon can be started to remove dust by spraying water mist in the first area. When the PLC controller confirms that the dust concentration is less than the lower limit of dust concentration based on the comparison result, it can be considered that the dust concentration in the first area is relatively low. In this case, it is not necessary to start the first mist cannon, or the first mist cannon in operation can be stopped. When the PLC controller confirms that the dust concentration is between the upper limit and the lower limit of dust concentration based on the comparison result, the current state of the first mist cannon can be maintained. That is, if the first mist cannon is currently in a stopped state, it will continue to be in a stopped state; if the first mist cannon is currently in an operating state, it will continue to be in an operating state.

[0028] Furthermore, multiple fog cannons were evenly distributed along the two side walls of the pit. For example, Figure 4The diagram shows another type of pit dust removal system using fog cannons. In one embodiment, a total of 6 fog cannons 3 can be installed on the two side walls 1 of the pit along the same direction as the conveyor belt 2. Three fog cannons are evenly distributed on each side wall. A corresponding dust level sensor 4 is installed next to each fog cannon 3 to detect the dust level concentration near the corresponding fog cannon in real time.

[0029] like Figure 5 The diagram shows the electrical layout of a pit dust removal system, including a main power circuit breaker 50, circuit breakers 51 for each of the six fog cannons, a switching power supply 52, a PLC controller 53, an AI module 54, a PLC power circuit breaker 55, a dust level sensor power circuit breaker 56, and an intermediate relay 57. It also includes a touch screen, fuses, and the six fog cannons. The brand and model of each electrical component can be selected according to actual needs, and no restrictions are imposed here.

[0030] Furthermore, the system also includes a display screen; the display screen is communicatively connected to the PLC controller; a switch is provided on the display screen; the switch is used to control the pit dust collection system to be in automatic or manual working mode. In this embodiment, the pit dust collection system can support automatic and manual working modes, and the working mode can be switched by turning the switch on or off on the display screen. For example, when the switch is on, the pit dust collection system can be in automatic working mode, and when the switch is off, the pit dust collection system can be in manual working mode, etc.

[0031] like Figure 6The diagram shows a program segment for controlling a fog cannon. It illustrates the program for switching the operating modes of six fog cannons. For example, in the first two lines, M8.0 corresponds to the manual / automatic control switch for fog cannon #1 (the aforementioned switch). When M8.0 is turned on on the display, the automatic operating mode is activated. M10.1 compares the dust concentration in the area where fog cannon #1 is located with the corresponding upper and lower dust concentration limits to control whether Q0.0 is True or False. True indicates that fog cannon #1 is on, and False indicates that fog cannon #1 is off. When M8.0 is turned off on the display, the manual operating mode is activated. The manual switch M20.1 on the display controls whether Q0.0 is True or False, thus controlling the start or stop of fog cannon #1. In manual operating mode, it is no longer controlled by dust concentration. Q0.0 corresponds to the control output point of the PLC controller. When this point is turned on, the No. 1 fog cannon starts; when this point is turned off, the No. 1 fog cannon stops. M20.1 corresponds to the manual control switch of the No. 1 fog cannon. The other programs correspond to the operating mode switching programs of the remaining 5 fog cannons, and their specific control logic is the same as that of the No. 1 fog cannon, so it will not be described again here. Each fog cannon is distinguished between manual control start / stop (i.e., manual working mode) and automatic control start / stop (i.e., automatic working mode) based on whether the switch is turned on or off.

[0032] Furthermore, the PLC controller is also used to: when the pit dust removal system is in automatic working mode, control the first mist cannon corresponding to the dust concentration sensor to start or stop according to the dust concentration. That is, in this embodiment, the PLC controller will only automatically control the first mist cannon corresponding to the dust concentration sensor to start or stop according to the dust concentration when the pit dust removal system is in automatic working mode.

[0033] like Figure 7 The diagram shows a program segment in an automatic working mode. The diagram illustrates the program control logic for the six fog cannons corresponding to the six areas. Specifically, in automatic working mode, the real-time dust concentration of each area is compared with the upper and lower dust concentration values ​​set on the display screen. When the actual dust concentration is greater than the upper dust concentration value, the corresponding fog cannon is automatically started; when the actual dust concentration is less than the lower dust concentration value, the corresponding fog cannon is automatically turned off. Figure 7In the process, when the real-time dust concentration of VD16 in area #1 (e.g., 85) is greater than the upper limit of dust concentration of VD100 set on the display (e.g., 60), M10.1 is True (i.e., 1), indicating that the fog cannon in area #1 will be activated. When the real-time dust concentration of VD16 in area #1 (e.g., 30) is less than the lower limit of dust concentration of VD104 set on the display (e.g., 40), M10.1 is False (i.e., 0), indicating that the fog cannon in area #1 will be deactivated. The automatic control logic for other fog cannons can be referenced from the control logic for fog cannon #1, and will not be elaborated here.

[0034] Furthermore, when the pit dust removal system is in manual operation mode, each fog cannon is also configured to: start operation upon receiving an activation command; and stop operation upon receiving a stop command. In other words, in this embodiment, when the pit dust removal system is in manual operation mode, the start and stop of each fog cannon can be manually controlled individually according to actual needs, and in manual operation mode, it is not subject to the control of dust concentration.

[0035] Furthermore, the display screen is also used to: display the dust concentration of the corresponding area collected by each dust sensor, as well as the upper and lower limits of dust concentration for each corresponding area. For example... Figure 8 The diagram illustrates a display interface using six fog cannons as an example. The interface displays the real-time dust concentration in the areas corresponding to each of the six fog cannons, represented by six dust concentration values ​​in the upper left corner of the diagram. For example, "Dust Concentration 23 for Fog Cannon #1" indicates a dust concentration of 23 in the area corresponding to Fog Cannon #1. Additionally, the interface can also display the upper and lower dust concentration limits for each area, represented by 12 values ​​in the lower left corner of the diagram. For instance, "Dust High 20 for Fog Cannon #1" indicates an upper dust concentration limit of 20 in the area corresponding to Fog Cannon #1, and "Dust Low 10 for Fog Cannon #1" indicates a lower dust concentration limit of 10 in the area corresponding to Fog Cannon #1.

[0036] Furthermore, the display screen is also used to display the operating indicator light corresponding to each fog cannon. For example, if the operating indicator light corresponding to a specified fog cannon is constantly lit, it indicates that the specified fog cannon is in operation; if the operating indicator light corresponding to a specified fog cannon is off, it indicates that the specified fog cannon is in a stopped state; if the operating indicator light corresponding to a specified fog cannon is flashing, it indicates that the specified fog cannon is in a fault state.

[0037] like Figure 8 In the center, the automatic start button is used to activate the automatic mode. The lower right corner has the operation indicator lights, the on / off DIP switch, and the manual start / stop switch for each of the six fog cannons. The manual start / stop switch can be used to start and stop each fog cannon individually.

[0038] The aforementioned pit dust removal system using mist cannons atomizes water, enabling spraying over a wider area. The extended suspension time of the water mist increases air humidity, effectively reducing dust generation. Multiple mist cannons are evenly distributed across different areas of the pit for more comprehensive spraying. Multiple dust sensors collect dust concentration data in different areas of the pit and transmit this data to a PLC controller. The PLC controller performs logical calculations based on the dust concentration in each area to control the start and stop of the mist cannons in each area for dust removal. A display screen can be used as a host computer for parameter setting, real-time dust concentration display, and manual / automatic mist cannon start / stop control.

[0039] Overall, this solution can effectively prevent dust from rising back up, improve product quality, and enhance pit safety; it also has the advantages of low cost and increases the automation level of pit dust removal.

[0040] This invention provides a method for dust removal in a pit using a mist cannon, the method operating within any of the aforementioned pit dust removal systems using mist cannons; the pit dust removal system includes: multiple mist cannons installed in multiple areas within the pit, each mist cannon having a dust level sensor installed at a preset position; each dust level sensor is communicatively connected to a PLC controller; such as Figure 9 As shown, the method includes the following steps: Step S902: For each dust sensor, the dust sensor collects the dust concentration of the corresponding first area and sends the dust concentration to the PLC controller. In step S904, the PLC controller controls the first fog cannon corresponding to the dust concentration sensor to start or stop according to the dust concentration. When the first fog cannon is started, it is used to spray water mist to remove dust from the first area.

[0041] The aforementioned pit dust removal method using mist cannons can efficiently adsorb dust particles and promote their settling, achieving efficient dust reduction and saving energy and water. Furthermore, this method allows for zoned control of multiple mist cannons. By sending the dust concentration detected by the dust level sensor in each zone to the PLC controller, the PLC controller can control the start or stop of the mist cannons in each zone. This enables flexible start or stop of dust removal in different zones, facilitating maintenance personnel to enter the pit for equipment repairs, while preventing dust from rising back up and improving product quality.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pit dust suppression system using a fog cannon, characterized in that, The system includes: multiple fog cannons installed in multiple areas of the pit, each fog cannon having a dust level sensor installed at a preset position; each dust level sensor is communicatively connected to a PLC controller; For each of the dust sensors, the dust sensor is used to collect the dust concentration of the corresponding first area and send the dust concentration to the PLC controller; The PLC controller is used to control the first fog cannon corresponding to the dust concentration sensor to start or stop according to the dust concentration. When the first fog cannon is started, it is used to spray water mist to remove dust from the first area.

2. The system according to claim 1, characterized in that, The PLC controller is also used for: Obtain the upper limit and lower limit of dust level corresponding to the first region; The dust concentration is compared with the upper limit value and the lower limit value of dust concentration, respectively, to obtain the comparison result; The first fog cannon corresponding to the dust level sensor is started or stopped based on the comparison result.

3. The system according to claim 2, characterized in that, The PLC controller is also used for: If the comparison result indicates that the dust concentration is greater than the upper limit of the dust concentration, the first fog cannon corresponding to the dust sensor is activated, and water mist is sprayed through the first fog cannon to remove dust from the first area. If the comparison result indicates that the dust concentration is less than the lower limit of the dust concentration, the first fog cannon corresponding to the dust concentration sensor is controlled to stop, so as to stop dust removal in the first area.

4. The system according to claim 1, characterized in that, Multiple fog cannons are evenly distributed on both sides of the pit.

5. The system according to claim 1, characterized in that, The system also includes a display screen; the display screen is communicatively connected to the PLC controller; and a toggle switch is provided on the display screen. The switch is used to control the pit dust removal system to be in automatic or manual working mode.

6. The system according to claim 5, characterized in that, The PLC controller is also used for: When the pit dust removal system is in automatic working mode, it controls the first fog cannon corresponding to the dust concentration sensor to start or stop according to the dust concentration.

7. The system according to claim 5, characterized in that, When the sump dust removal system is in manual operation mode, for each of the fog cannons, the fog cannon is also used for: If a start command is received, start operation according to the start command; If a stop command is received, the operation shall be stopped according to the stop command.

8. The system according to claim 5, characterized in that, The display screen is also used for: The display shows the dust concentration of the corresponding area collected by each of the dust sensors, as well as the upper and lower dust concentration limits for each corresponding area.

9. The system according to claim 5, characterized in that, The display screen is also used for: The display shows the operation indicator light corresponding to each of the fog cannons.

10. A method for dust suppression in a pit using a fog cannon, characterized in that, The method operates on the pit dust removal system using fog cannons as described in any one of claims 1-9; the pit dust removal system includes: multiple fog cannons installed in multiple areas of the pit, each fog cannon having a dust level sensor installed at a preset position; each dust level sensor is communicatively connected to a PLC controller; the method includes: For each of the dust sensors, the dust sensor collects the dust concentration of the corresponding first area and sends the dust concentration to the PLC controller; The PLC controller controls the first fog cannon corresponding to the dust concentration sensor to start or stop according to the dust concentration concentration; wherein, when the first fog cannon is started, the first fog cannon is used to spray water mist to remove dust from the first area.

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