Energy-saving dust suppression system for discharging ash in ash silo and using method of energy-saving dust suppression system

Abstract

The invention relates to the technical field of dust suppression, in particular to an ash silo ash unloading energy-saving dust suppression system and a using method. The blades are used for stirring materials in the stirrer box body; the clean water pump is arranged between the clean water tank in the desulfurization wastewater room and the water supply main pipe and is used for conveying clean water to the water supply main pipe; the self-excitation regulating valve is arranged at the outlet of the clean water pump, is connected with the water supply main pipe and is used for detecting and responding to the pressure change in the water supply main pipe; and an internal circulation pipeline. The impeller has the beneficial effects that the blades are made of the polymerized carbonized resin material, so that the impeller has excellent hydrophobicity and low friction coefficient. The introduction of the self-excitation regulating valve realizes the automatic monitoring and regulation of the pressure in the water supply mother pipe, can effectively cope with the pressure fluctuation in the system, avoids the damage to the pipeline and equipment caused by overpressure, and also can release excess pressure in time through the internal circulation pipeline to reduce the water flow impact.

Description

Technical Field

[0001] The invention relates to the technical field of dust suppression, and in particular to an ash bin unloading energy-saving dust suppression system and a use method thereof. Background Art

[0002] With the increasing awareness of environmental protection and the increasingly stringent requirements of the state on air pollution control, dust emissions from thermal power plants during production have become one of the focuses of attention. Especially in thermal power plants that use pneumatic ash conveying systems, the dust problem generated when unloading ash from ash silos is particularly prominent, which not only affects the quality of the surrounding environment, but also may threaten the health of power plant workers.

[0003] Due to the fact that the wet agitator blades of the ash bin commonly used in thermal power plants are made of cast steel and the desulfurization water quality is poor, the surface of the humidification agitator blades is prone to pitting corrosion, sticking, wear, and hardening. The humidification system nozzle form and system design defects lead to a low ash-to-water ratio, uneven mixing, and unwashed dust, thus forming dust. Summary of the invention

[0004] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] The object of the present invention is to provide an energy-saving dust suppression system for ash bin unloading.

[0006] Therefore, its purpose is to solve the problems that the surface of the agitator blade is prone to pitting corrosion, sticking, wear and hardening.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: an ash bin unloading energy-saving dust suppression system, which includes a stirrer box; blades, used to stir the material inside the stirrer box; a clean water pump, installed between the clean water tank and the water supply main pipe in the desulfurization wastewater room, used to transport clean water to the water supply main pipe; a self-actuated regulating valve, arranged at the outlet of the clean water pump, connected to the water supply main pipe, used to detect and respond to pressure changes in the water supply main pipe; an internal circulation pipeline, connecting the self-actuated regulating valve and the clean water tank, used to guide part of the fluid back to the clean water tank when the pressure in the water supply main pipe exceeds a preset threshold, so as to reduce the pressure of the water supply main pipe; a nozzle, used to spray liquid on the blades.

[0008] As a preferred solution of the ash bin unloading energy-saving dust suppression system of the present invention, the blades are made of polymerized carbonized resin material, and the polymerized resin matrix is ​​selected from one or more of epoxy resin, phenolic resin or polyurethane resin.

[0009] As a preferred embodiment of the ash silo ash discharge energy-saving and dust suppression system of the present invention, wherein: chamfers or rounded corners are provided at the edges of the blades.

[0010] As a preferred embodiment of the ash silo ash discharge energy-saving and dust suppression system of the present invention, wherein: the shape of the blades is designed to be spiral, flat or serrated.

[0011] As a preferred embodiment of the ash silo ash discharge energy-saving and dust suppression system of the present invention, wherein: the spray nozzles are connected to the water supply main pipe, and the design form of the spray nozzles is the same as that of the spray layer of the absorber slurry circulation pump.

[0012] As a preferred embodiment of the ash silo ash discharge energy-saving and dust suppression system of the present invention, wherein: a sewage discharge hole is provided at the head position of the water supply main pipe.

[0013] As a preferred embodiment of the ash silo ash discharge energy-saving and dust suppression system of the present invention, wherein: the water supply main pipe is arranged above the blades in a "丰" - shaped layout.

[0014] As a preferred embodiment of the ash silo ash discharge energy-saving and dust suppression system of the present invention, wherein: the preset threshold is 0.6 MPa. When the pressure in the water supply main pipe exceeds the preset threshold of 0.6 MPa, part of the fluid is led back to the clear water tank through the water supply main pipe.

[0015] To solve the above technical problems, the present invention also provides the following technical solution: A method for using an ash silo ash discharge energy-saving and dust suppression system, including an ash silo ash discharge energy-saving and dust suppression system, and,

[0016] Start the clear water pump, and the clear water pump extracts clear water from the clear water tank and transports it to multiple spray nozzles through the water supply main pipe; a self-excited regulating valve is installed on the water supply main pipe, and the self-excited regulating valve is in an open state and monitors the pressure in the water supply main pipe; during the normal operation of the system, the self-excited regulating valve continuously monitors the pressure in the water supply main pipe. When the detected pressure value is lower than the preset safety upper limit, the valve is kept open to ensure that the clear water can flow smoothly to the spray nozzles; the clear water is atomized into fine water droplets through the spray nozzles and sprayed onto the rotating blades or other positions where dust suppression is required.

[0017] The beneficial effects of the present invention are as follows: The blades are made of polymerized carbonized resin material, which combines the advantages of a variety of high-performance resins. It not only has high strength, high toughness and good corrosion resistance, but also has excellent hydrophobicity and low friction coefficient. The combined action of these characteristics makes the blades outstanding in reducing wear, preventing blockage and improving work efficiency, showing obvious performance advantages compared with traditional materials.

[0018] The edges of the blades are chamfered or rounded, and the designs of different shapes (such as spiral, flat, and serrated) can be flexibly selected according to actual mixing needs, which not only reduces the resistance and wear of the materials during the mixing process, but also improves the mixing efficiency and quality. At the same time, the lining plate of the same material set on the inner wall of the mixer box not only protects the box from direct impact and wear of the materials, but also further enhances the overall durability and reliability of the system.

[0019] The introduction of the self-actuated regulating valve realizes the automatic monitoring and regulation of the pressure in the water supply main pipe, ensuring the stability and safety of the system operation. This design can not only effectively deal with the pressure fluctuations inside the system and avoid the damage to the pipeline and equipment caused by overpressure, but also release the excess pressure in time through the internal circulation pipeline, reduce the impact of water flow, significantly reduce the vibration of the pipeline, and extend the service life of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0021] Figure 1 Schematic diagram of the system device in the present invention.

[0022] Figure 2 It is a side view structural schematic diagram of the present invention.

[0023] In the figure:

[0024] 100. Blade; 101. Clean water pump; 102. Clean water tank; 103. Water supply main pipe; 104. Self-actuated regulating valve; 105. Internal circulation pipeline; 106. Nozzle. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Example 1

[0029] Reference Figure 1 , which is the first embodiment of the present invention, and provides an ash storage ash unloading energy-saving dust suppression system, including a stirrer housing; blades 100; blades 100 are made of polymerized carbonized resin material, and the polymerized resin matrix is ​​selected from one or more of epoxy resin, phenolic resin or polyurethane resin. Clean water pump 101, installed between clean water tank 102 and water supply main pipe 103 in desulfurization wastewater room, used to transport clean water to water supply main pipe 103; self-actuated regulating valve 104, arranged at the outlet of clean water pump 101, connected to water supply main pipe 103, used to detect and respond to pressure changes in water supply main pipe 103; internal circulation pipeline 105, connecting self-actuated regulating valve 104 and clean water tank 102, used to guide part of the fluid back to clean water tank 102 when the pressure in water supply main pipe 103 exceeds a preset threshold, so as to reduce the pressure of water supply main pipe 103; nozzle 106, used to spray liquid on blades 100. The preset threshold value is 0.6 MPa. When the pressure in the water supply main pipe 103 exceeds the preset threshold value 0.6 MPa, part of the fluid is led back to the clean water tank 102 through the water supply main pipe 103.

[0030] In this embodiment, the blade 100 is the part of the system that directly contacts the material. The blade 100 is made of a polymerized carbonized resin material. The basis of this material is a polymerized resin matrix, which can be composed of one or more combinations of epoxy resin, phenolic resin or polyurethane resin. These resins themselves have excellent mechanical properties and chemical stability. Through specific processing techniques, such as high-temperature curing, they can form a composite material with high strength, high toughness and good corrosion resistance.

[0031] Due to the molecular structure of the resin matrix, the polymerized carbonized resin material exhibits strong hydrophobicity, which means that it is not easy for water to form a stable liquid film on its surface, thereby reducing the accumulation of scale and other pollutants. The material has a smooth surface and moderate hardness, so it has less friction when in contact with other objects, which helps to reduce wear and improve work efficiency. The polymerized carbonized resin material is not only hard, but also tough, and can not be easily damaged when subjected to external impact, ensuring reliability for long-term use. This type of material has good resistance to most chemicals and can maintain stable performance even in harsh working environments.

[0032] Due to the hydrophobicity and low friction coefficient of the material itself, it is difficult for dust, particles and other impurities to adhere to the surface of the blade 100, which effectively prevents the occurrence of clogging of the blade 100. The excellent corrosion resistance means that even in an environment containing corrosive media, the blade 100 is not easily corroded, which extends the service life. By reducing the friction between the blade 100 and the material and avoiding the additional load caused by sticking, the operating efficiency of the entire system is improved, thereby reducing the current intensity required by the motor. By improving the wear resistance and impact resistance of the blade 100, the maintenance frequency is reduced, and the availability and production continuity of the equipment are improved.

[0033] The clean water pump 101 is installed between the clean water tank 102 and the water supply main pipe 103 in the desulfurization wastewater room, and is responsible for transporting clean water from the clean water tank 102 to the water supply main pipe 103. The self-actuated regulating valve 104 is arranged at the outlet of the clean water pump 101 and is connected to the water supply main pipe 103. This valve can automatically detect the pressure in the water supply main pipe 103 and make corresponding adjustments according to the pressure change to ensure the stable operation of the system. Internal circulation pipeline 105: connects the self-actuated regulating valve 104 and the clean water tank 102 to form a closed-loop hydraulic system. When the pressure in the water supply main pipe 103 exceeds the preset threshold (0.6MPa), part of the fluid will return to the clean water tank 102 through the internal circulation pipeline 105, so as to reduce the pressure of the water supply main pipe 103 and avoid excessive pressure from causing damage to the system. The nozzle 106 is used to spray liquid on the blades 100 or other places where dust suppression is required.

[0034] Specifically, when the system is started, the clean water pump 101 starts to work, and delivers the clean water in the clean water tank 102 to the water supply main pipe 103. The self-actuated regulating valve 104 is in an initial state, and monitors the pressure in the water supply main pipe 103.

[0035] Normal operation:

[0036] Under normal operating conditions, the pressure in the water supply main pipe 103 is maintained within a safe range and is lower than 0.6 MPa. At this time, the self-actuated regulating valve 104 remains open, and clean water flows to the nozzle 106 through the water supply main pipe 103. The nozzle 106 atomizes the clean water and sprays it onto the blades 100, effectively suppressing the flying of dust through the wetting effect. During the rotation process, the blades 100 send the wet ash into the transportation equipment, further reducing the generation of dust.

[0037] Pressure Regulation:

[0038] When the system is running, if the pressure in the water supply main pipe 103 exceeds the preset threshold (0.6MPa), the self-actuated regulating valve 104 will automatically close or reduce the opening. (This type of regulating valve directly acts on the valve actuator through the internal pressure change to open or close the valve.)

[0039] At this time, part of the fluid will return to the clean water tank 102 through the inner circulation pipe 105, thereby reducing the pressure in the water supply main pipe 103. At this time, if the water flow in the water supply main pipe 103 is not discharged in time, the pressure will rise sharply. The self-actuated regulating valve 104 adjusts the opening in time to ensure that even when the valve is closed, the excess pressure can be released through the inner circulation pipe 105, avoiding a sudden increase in pressure and reducing water flow impact, thereby significantly reducing pipeline vibration and extending the service life of the pipeline.

[0040] Once the pressure in the water supply main pipe 103 returns to the normal range, the self-actuated regulating valve 104 will reopen to resume normal water supply.

[0041] Example 2

[0042] Reference Figure 1 , which is the second embodiment of the present invention, and provides an energy-saving dust suppression system for ash bin unloading. The edge of the blade 100 is chamfered or rounded to reduce the resistance and wear of the material during the mixing process. The thickness of the blade 100 is between 1-5 mm. The inner wall of the mixer box is provided with a lining plate of the same material as the blade 100, and the lining plate is installed by welding, bonding or mechanical fixing. The shape of the blade 100 is designed to be spiral, flat or serrated to meet different mixing requirements.

[0043] In this embodiment, in order to reduce the resistance and wear of the material during the mixing process, the edge of the blade 100 is chamfered or rounded. The friction between the blade 100 and the material is reduced, and the energy consumption of the equipment during operation is reduced. In addition, the rounded edge can also reduce the residue of the material on the blade 100, especially when processing sticky materials.

[0044] The inner wall of the agitator box is provided with lining plates made of the same material as the blades 100, which are installed by welding, bonding or mechanical fixing. The function of the lining plates is to protect the box from direct impact and wear of the materials, especially when handling highly corrosive materials, the lining plates can significantly extend the service life of the box. The same material as the blades 100 is used, and due to the hydrophobicity and low friction coefficient of the material itself, it is difficult for dust, particles and other impurities to adhere to the surface of the lining plates. The excellent corrosion resistance means that even in an environment containing corrosive media, the lining plates are not easily corroded, thereby extending the service life.

[0045] According to different stirring requirements, the shape of the blade 100 is designed to be spiral, flat or sawtooth:

[0046] Spiral blade 100: suitable for materials with good fluidity, can produce strong axial flow, and help to quickly mix the materials.

[0047] Flat blade 100: Suitable for materials with high viscosity, it can provide a large shear force to help break up material agglomerates and achieve uniform mixing.

[0048] Sawtooth blade 100: Suitable for occasions requiring strong shearing action, such as crushing large pieces of materials and promoting dissolution.

[0049] Example 3

[0050] Reference Figure 1-2 , which is the third embodiment of the present invention. This embodiment provides a dust-removing and energy-saving system for ash discharge from an ash silo. The spray head 106 is connected to the water supply main pipe 103. The design form of the spray head 106 is the same as that of the spray layer of the slurry circulation pump in the absorption tower, which is used to evenly distribute clear water to ensure the spray effect in the desulfurization tower and improve the desulfurization efficiency. A sewage discharge hole is provided at the head position of the water supply main pipe 103 to regularly remove the sludge that may accumulate and prevent the occurrence of throttling phenomena. The water supply main pipe 103 is arranged above the blade 100 in a "丰" - shaped layout.

[0051] In this embodiment, traditional humidification spray systems usually adopt a simple layout method for the spray head 106. However, due to a large amount of suspended solids and corrosive substances in the desulfurization wastewater, the spray head 106 is prone to blockage, affecting the spray effect. In addition, uneven distribution of the spray water flow rate and pressure will also cause insufficient spraying in some areas inside the desulfurization tower, thereby reducing the desulfurization efficiency. To solve these problems, the present invention has innovatively designed the spray system, introduced a new type of non-blocking silicon carbide eddy current spray head 106, and optimized the layout method of the spray head 106.

[0052] The spray head 106 is made of silicon carbide material, which has extremely high corrosion resistance and wear resistance, can effectively resist chemical erosion in the desulfurization wastewater, and prolong the service life of the spray head 106.

[0053] Adopting an eddy current design, it can generate fine and dense water mist at a relatively low pressure, improving the atomization effect while reducing the possibility of blockage of the spray head 106. (There is a special eddy current chamber inside this spray head 106. When the liquid passes through the spray head 106, a strong rotational movement will be formed in the eddy current chamber. This high-speed rotation can effectively throw the solid particles in the fluid to the edge, thus preventing these particles from blocking the nozzle.)

[0054] The flow diameter of a single spray head 106 is DN20, which can ensure sufficient flow output. The designed flow rate of each spray head 106 is 3 tons per hour. The entire system is configured with 10 such spray heads 106, and the total flow rate can reach 20 tons per hour, meeting the requirements of high-load operation.

[0055] The "rich" layout method can not only ensure a reasonable spacing between the nozzles 106 to avoid interference between water flows, but also maximize the spray coverage area to achieve a full spray without dead angles.

[0056] The nozzles 106 are installed above the blades 100 and above the agitator, so that the stirring effect can be fully utilized to make the sprayed water mist fully mix with the dry ash, achieving an ideal humidification effect. At the same time, a sewage discharge hole is opened at the head of the main pipe to facilitate regular cleaning of the accumulated dirt inside and prevent throttling caused by blockage.

[0057] Through the optimized nozzles 106 and layout design, the system can humidify the dry ash to a moisture content of 15%-18%, forming a continuous water curtain to effectively isolate dust and achieve the purpose of cooling and dust reduction. During the spraying process, the water mist can evenly cover the entire stirring area, avoiding common problems such as local wetting or drying in traditional systems.

[0058] A method of using an energy-saving dust suppression system for ash silo ash discharge. When the system is started, the clean water pump 101 starts to operate, extracts the clean water in the clean water tank 102 and transports it to each nozzle 106 through the water supply main pipe 103. Among them, the self-actuating regulating valve 104 is in the open state to monitor the pressure in the water supply main pipe 103.

[0059] During normal operation, the self-actuating regulating valve 104 continuously monitors the pressure in the water supply main pipe 103. If the pressure is lower than the preset safety upper limit (for example, 0.6 MPa), the valve remains open to ensure the smooth flow of clean water to the nozzles 106.

[0060] The nozzles 106 atomize the clean water into fine water droplets and spray them onto the rotating blades 100 or other positions where dust suppression is required. During the rotation of the blades 100, the dust flying is effectively controlled through the wetting effect, and the wetted ash residue is sent into the transportation equipment to reduce the generation of dust.

[0061] In the pressure abnormal adjustment stage, when the pressure in the water supply main pipe 103 exceeds the preset threshold, the self-actuating regulating valve 104 automatically reduces the opening degree or closes to prevent the pressure in the water supply main pipe 103 from being too high. At this time, part of the water flow returns to the clean water tank 102 through the internal circulation pipe 105, thereby reducing the pressure in the water supply main pipe 103. Once the pressure in the water supply main pipe 103 drops back to the safe range, the self-actuating regulating valve 104 will reopen to resume normal water supply.

[0062] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0063] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0064] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An energy-saving dust suppression system for ash storage unloading, characterized in that: including, a mixer housing; a blade (100) for mixing the materials inside the mixer housing; a clean water pump (101) installed between a clean water tank (102) in a desulfurized wastewater area and a water supply main pipe (103) for delivering clean water to the water supply main pipe (103); a self-excited regulating valve (104) provided at the outlet of the clean water pump (101) and connected to the water supply main pipe (103) for detecting and responding to the pressure change in the water supply main pipe (103); an internal circulation pipe (105) connecting the self-excited regulating valve (104) and the clean water tank (102) for guiding part of the fluid back to the clean water tank (102) to reduce the pressure in the water supply main pipe (103) when the pressure in the water supply main pipe (103) exceeds a preset threshold; a spray head (106) for spraying liquid on the blade (100); 2. The ash bin unloading energy-saving dust suppression system according to claim 1, characterized in that: the blade (100) is made of a polymerized carbonized resin material, and the polymer resin matrix is selected from one or more of epoxy resin, phenolic resin, or polyurethane resin; 3. An ash bin ash unloading energy-saving dust suppression system as claimed in claim 2, characterized in that: the edge of the blade (100) is provided with chamfering or rounding treatment; 4. The ash bin unloading energy-saving dust suppression system according to claim 3 is characterized in that: a lining plate of the same material as the blade (100) is provided on the inner wall of the mixer housing, and the lining plate is installed by welding, bonding, or mechanical fixing; 5. An energy-saving dust suppression system for ash storage unloading as claimed in claim 4, characterized in that: the shape of the blade (100) is designed as spiral, flat, or serrated; 6. The ash bin unloading energy-saving dust suppression system according to claim 1, characterized in that: the spray head (106) is connected to the water supply main pipe (103), and the design form of the spray head (106) is the same as that of the spray layer of the absorber slurry circulation pump; 7. An energy-saving dust suppression system for ash storage unloading as claimed in claim 6, characterized in that: a sewage discharge hole is provided at the head position of the water supply main pipe (103); 8. An energy-saving dust suppression system for ash bin unloading as claimed in claim 7, characterized in that: the water supply main pipe (103) is arranged above the blade (100) in a "rich" - shaped layout; 9. An energy-saving dust suppression system for ash storage unloading as claimed in claim 8, characterized in that: the preset threshold is 0.6 MPa. When the pressure in the water supply main pipe (103) exceeds the preset threshold of 0.6 MPa, part of the fluid is led back to the clean water tank (102) through the water supply main pipe (103); 10. A method for using an ash bin unloading energy-saving dust suppression system, characterized in that: including a dust - removal energy - saving and dust - suppressing system for ash silo ash discharge according to any one of claims 1 to 9, and, starting the clean water pump, the clean water pump extracts clean water from the clean water tank and delivers it to multiple spray heads through the water supply main pipe; a self-excited regulating valve is installed on the water supply main pipe, and the self-excited regulating valve is in an open state and monitors the pressure in the water supply main pipe; during the normal operation of the system, the self-excited regulating valve continuously monitors the pressure in the water supply main pipe. When the detected pressure value is lower than the preset safety upper limit, the valve is kept open to ensure that the clean water can flow smoothly to the spray heads; atomizing the clean water into fine water droplets through the spray heads and spraying them onto the rotating blades or other positions where dust suppression is required.

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