Dust filter and working method thereof

Abstract

The invention discloses a dust filter and a working method thereof. The dust filter comprises a filtering system, an induced draft system and a water circulation system, the filtering system comprises a shell and a filter element, an air outlet is formed in the shell, the filter element is arranged in the shell, and a filtering opening of the filter element is communicated with the air outlet; the air inducing system comprises a connecting pipe, a first shrinkage pipe, a first throat pipe and a draught fan, the connecting pipe is arranged on the shell in a penetrating mode, the first shrinkage pipe and the first throat pipe are both arranged in the shell, and the connecting pipe, the first shrinkage pipe and the first throat pipe are sequentially arranged in a communicating mode from top to bottom; the first throat pipe is arranged above the filter element, an air outlet of the first throat pipe and an inlet of the filter element are arranged at an interval, and the fan is arranged in the connecting pipe in a penetrating manner; the water circulation system comprises a water tank, a water pump and a plurality of nozzles, the water tank is arranged in the shell and below the filter element, a sewage inlet of the water tank and an outlet of the filter element are arranged at intervals, the water pump is communicated with the water tank and the nozzles, and the nozzles are annularly arranged in the first throat pipe. The working method is based on the dust filter.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, and in particular to a dust filter and a working method thereof. Background Art

[0002] The shallow buried tunnel construction site of electric power will produce a large amount of dust containing free silica and combustible particles due to excavation, drilling, blasting and other operations. This type of dust is significantly harmful. For safety reasons, dust removal is required during the shallow buried tunnel construction of electric power.

[0003] Wet dust collector is one of the common dust removal devices, but there are still many problems: the existing wet dust collectors are divided into two categories: household and industrial. Household wet dust collectors often have defects such as small air processing volume, low efficiency, and inability to meet engineering needs. Industrial wet dust collectors generally have problems such as large size, heavy weight, and difficulty in moving. They mostly use non-woven filter elements, which have poor filtering effect on cement particles in high humidity environments and require frequent replacement. They are difficult to adapt to the needs of shallow buried power excavation construction sites.

[0004] In addition, among other dust removal technologies, electrostatic adsorption dust removal equipment has a complex structure and high installation and maintenance requirements; centrifugal dust collectors have large pressure losses and high shell pressure resistance requirements; smoke filters have defects such as being too large, slow dust reduction speed, and high cost of use. They are also not suitable for shallow buried and underground excavation construction site environments for electricity. Summary of the invention

[0005] The object of the present invention is to provide a dust filter and a working method thereof, so as to solve at least one problem mentioned in the above background technology, such as low air processing efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: A dust filter, comprising: A filter system, the filter system comprising a housing and a filter element, the housing being provided with an air outlet, the filter element being arranged in the housing, and the filter port of the filter element being communicated with the air outlet; An air induction system, the air induction system comprising a connecting pipe, a first shrinkable pipe, a first throat pipe and a fan, the connecting pipe is passed through the shell, the first shrinkable pipe and the first throat pipe are both arranged in the shell, the connecting pipe, the first shrinkable pipe and the first throat pipe are sequentially connected from top to bottom, the first throat pipe is arranged above the filter element and the air outlet of the first throat pipe is spaced from the inlet of the filter element, and the fan is passed through the connecting pipe; Water circulation system, the water circulation system includes a water tank, a water pump and a plurality of nozzles. The water tank is arranged inside the housing. The water tank is arranged below the filter element, and the sewage inlet of the water tank is spaced from the outlet of the filter element. The water pump is respectively communicated with the water tank and the plurality of nozzles. The plurality of nozzles are arranged in a ring inside the first throat tube.

[0007] Optionally, the filter element includes a stainless steel filter net, a cover plate, a partition plate and a return water net. The stainless steel filter net is wound into a spiral shape along the central axis of the housing and arranged inside the housing. The outer filter port of the stainless steel filter net is communicated with the air outlet. The cover plate is covered on the upper end of the stainless steel filter net. The cover plate is arranged below the first throat tube. There is an inlet on the cover plate. The inlet is communicated with the spiral hole of the stainless steel filter net. The inlet is spaced from the outlet of the first throat tube. The lower end of the partition plate is arranged in a ring on the outer periphery of the cover plate. The upper end of the partition plate is arranged in a ring on the inner wall of the housing. The return water net is laid on the lower end of the stainless steel filter net. The outer periphery of the return water net is arranged in a ring on the inner wall of the housing. The outlet of the return water net is communicated with the sewage inlet of the water tank.

[0008] Optionally, the air induction system further includes a second contraction tube, a second throat tube and a diffuser tube that are sequentially communicated. The air outlet of the diffuser tube is communicated with the air inlet of the connecting tube.

[0009] Optionally, a one-way slope is provided at the bottom of the water tank. The water pump is provided at the top of the one-way slope. The bottom of the one-way slope is connected to the water outlet of the water tank.

[0010] Optionally, the housing includes a first housing, a second housing and a third housing. The upper end of the second housing is detachably connected to the lower end of the first housing. The lower end of the second housing is detachably connected to the upper end of the third housing. The connecting tube passes through the first housing. The first contraction tube and the first throat tube are arranged inside the first housing. The filter element is arranged inside the second housing. The air outlet is provided on the second housing. The water tank and the water pump are arranged inside the third housing.

[0011] Optionally, it further includes a detection module and a control module. The detection module passes through the housing. The control module is arranged in a ring outside the first throat tube. The control module is respectively electrically connected to the detection module, the water pump and the fan. The control module is used to process the air quality data from the detection module and control the rotation speed of the water pump according to the processing result.

[0012] Optionally, a solenoid valve is provided at the sewage outlet of the water tank, and a float valve is provided at the water inlet of the water tank. The solenoid valve is electrically connected to the control module.

[0013] Optionally, the control module includes a main control system and a flow controller, and the main control system and the flow controller are both arranged outside the first throat pipe. The main control system is electrically connected to the flow controller, the detection module and the fan, respectively, and the flow controller is electrically connected to the water pump. Optionally, it further includes a toxic gas detection module and an alarm module, the toxic gas detection module and the alarm module are electrically connected, and the toxic gas detection module and the alarm module are both electrically connected to the control module.

[0014] A working method of a dust filter, based on the dust filter provided in the above embodiment, comprises: The water pump introduces the water in the water tank into the plurality of nozzles, and the plurality of nozzles spray water in the first throat pipe to form water mist; The fan introduces ambient air into the connecting pipe, and the ambient air flows into the first throat after passing through the first contraction tube. The first contraction tube and the first throat accelerate the ambient air, so that the ambient air collides with the water mist and mixes into a mixed gas. The mixed gas flows out from the first throat and enters the filter element. The mixed gas condenses in the filter element, so that the mixed gas is separated into sewage and air. The air flows through the filter port of the filter element and is discharged from the air outlet, and the sewage falls into the water tank for recovery, thereby completing one dust removal.

[0015] The beneficial effects of the present invention are: The dust filter of the present invention solves technical problems such as low air treatment efficiency in the prior art and achieves beneficial effects: a first venturi tube is formed by a first contraction tube, a first throat and a shell arranged from top to bottom, thereby increasing the flow rate of air and increasing the amount of ambient air, so that the water mist sprayed from the nozzle prolongs the mixing time after colliding with the ambient gas, better adsorbs dust in the ambient gas, and improves the air treatment efficiency. At the same time, the mixed air is filtered through the filter element and then sewage is condensed, which shortens the separation time of sewage and air and further improves the efficiency of gas treatment.

[0016] Furthermore, the spiral stainless steel filter can form a vortex, which prolongs the contact time between the water mist and the ambient air, allowing the water mist to absorb more dust and improving the air purification effect.

[0017] Furthermore, a second Venturi tube is formed by the second contraction tube, the expansion tube and the second throat, thereby realizing a double Venturi tube structure, so that the flow velocity of the ambient air is further improved, the amount of ambient air is increased, and the mixing time of the water mist sprayed from the nozzle after colliding with the ambient gas is prolonged, so as to better adsorb the dust in the ambient gas and improve the air processing efficiency.

[0018] Furthermore, through the one-way slope and the sewage outlet, when sewage is discharged, the water containing dust forms a directional flow, which can realize the automatic migration of dust to the sewage outlet.

[0019] Furthermore, the device can be quickly assembled, disassembled, transported and maintained in a detachable manner, thereby improving the flexibility of the equipment.

[0020] Furthermore, by regulating the speed of the water pump through the detection module and the control module, energy consumption can be reduced.

[0021] Furthermore, by opening and closing the sewage outlet through the solenoid valve and the control module, automatic sewage discharge can be achieved, thus preventing sediment deposition from adversely affecting the operation of the device.

[0022] Furthermore, through the toxic gas detection module and the alarm module, toxic gases in the environment can be discovered in time and early warnings can be issued, thereby improving the safety of users. At the same time, filtering, detection, and alarm can be integrated to achieve energy conservation, environmental protection, and economic applicability.

[0023] The working method of the dust filter of the present invention solves technical problems such as low air treatment efficiency in the prior art and achieves beneficial effects: by increasing the air flow rate and increasing the amount of ambient air, the water mist sprayed from the nozzle prolongs the mixing time after colliding with the ambient gas, better adsorbs the dust in the ambient gas, and improves the air treatment efficiency. At the same time, by filtering the mixed air and then condensing the sewage, the separation time of the sewage and the air is shortened, further improving the efficiency of gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 A dust filter provided according to an embodiment of the present invention; Among them, 1. shell; 2. filter element; 3. air induced system; 4. water tank; 5. water pump; 6. nozzle; 11. first shell; 12. second shell; 13. third shell; 21. stainless steel filter; 22. cover plate; 23. isolation plate; 24. return water network; 31. connecting pipe; 32. first contraction pipe; 33. first throat; 34. fan; 35. second contraction pipe; 36. second throat; 37. expansion pipe; 41. solenoid valve; 42. float valve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present invention.

[0028] Below, refer to Figure 1 A dust filter and a working method thereof according to an embodiment of the present invention are described in detail.

[0029] A first embodiment of the present invention provides a dust filter, which is described in detail below with reference to the accompanying drawings.

[0030] like Figure 1As shown, a dust filter comprises a filtering system, an air induction system 3 and a water circulation system, wherein the filtering system comprises a housing 1 and a filter element 2, wherein the housing 1 is provided with an air outlet, the filter element 2 is arranged in the housing 1, and the filter port of the filter element 2 is communicated with the air outlet; the air induction system 3 comprises a connecting pipe 31, a first shrinkable pipe 32, a first throat pipe 33 and a fan 34, wherein the connecting pipe 31 is passed through the housing 1, the first shrinkable pipe 32 and the first throat pipe 33 are both arranged in the housing 1, and the connecting pipe 31, the first shrinkable pipe 32 and the first throat pipe 33 are connected to each other. The water circulation system comprises a water tank 4, a water pump 5 and a plurality of nozzles 6, the water tank 4 is arranged in the housing 1, the water tank 4 is arranged below the filter element 2 and the sewage inlet of the water tank 4 is arranged at intervals from the outlet of the filter element 2, the water pump 5 is respectively connected with the water tank 4 and the plurality of nozzles 6, and the plurality of nozzles 6 are arranged in a circle in the first throat pipe 33.

[0031] It should be noted that the polluted air enters the first throat 33 through the air induced flow system 3 to provide drainage power, and enters the filter element 2 after being fully mixed with the water mist supplied by the nozzle 6 in the first throat 33; the mixed gas formed by the water and the ambient air forms a water film on the filter element 2 and the equipment housing, which can adsorb and filter dust, welding smoke, PM2.5 and water at the same time, and the obtained dry and clean air is discharged from the air outlet, and the obtained filtered water naturally falls into the water tank 4 for recycling, or is discharged through the water outlet; in order to conveniently connect the shell 1 and the filter element 2, in this embodiment, preferably, the filter element 2 is provided with a plurality of spring lock buckles, and the shell is provided with a socket and a sealing ring; in order not to occupy extra space, in this embodiment, the shell 1 is provided with a plurality of movable hanging rings arranged in a ring array, and the bottom of the shell 1 is evenly provided with a plurality of adjustable universal anchor bolts; the size of the shell 1 is based on the actual According to actual needs, in order to reduce the occupied space, in this embodiment, preferably, the thickness of the device is controlled within 300mm (0.3m), the length of the non-detachable part in the device is controlled within 2m, and the overall weight of the device in the working state should be controlled within 20kg; in order to avoid large noise from the outside, in this embodiment, preferably, the inner wall of the shell 1 is embedded with flushable sound insulation cotton; the fan 34 can be powered by a 220V power supply; in order to achieve convenient connectivity, in this embodiment, preferably, a connecting pipe 31 is provided between the water pump 5 and the multiple nozzles 6; the water inlet of the water tank 4 can be connected to the anchor spray water supply pipe to supply water to the inside of the equipment; in order to achieve convenient operation, in this embodiment, preferably, a control button or switch is provided on the shell 1; in order to save materials, in this embodiment, preferably, the water tank 4 and the shell 1 are integrated.

[0032] Thus, a beneficial effect is achieved: the first venturi tube is formed by the first contraction tube 32, the first throat 33 and the shell 1 arranged from top to bottom, so as to increase the flow rate of the air, increase the amount of ambient air, prolong the mixing time after the water mist sprayed by the nozzle 6 collides with the ambient gas, better adsorb the dust in the ambient gas, and improve the air treatment efficiency. At the same time, the mixed air is filtered by the filter element 2 to condense the sewage, shortening the separation time of the sewage and the air, further improving the efficiency of the gas treatment, and improving the ventilation effect.

[0033] In order to improve the mixing efficiency and quickly separate the mixed gas, in this embodiment, preferably, the filter element 2 includes a stainless steel filter screen 21, a cover plate 22, an isolation plate 23 and a water return screen 24, the stainless steel filter screen 21 is wound into a spiral shape along the central axis of the shell 1 and is arranged in the shell 1, the outer ring filter port of the stainless steel filter screen 21 is connected to the air outlet, the cover plate 22 is covered on the upper end of the stainless steel filter screen 21, and the cover plate 22 is arranged below the first throat pipe 33, The cover plate 22 is provided with an inlet, which is communicated with the spiral hole of the stainless steel filter screen 21, and the inlet is spaced apart from the outlet of the first throat pipe 33. The lower end of the isolation plate 23 is arranged on the outer periphery of the cover plate 22, and the upper end of the isolation plate 23 is arranged on the inner wall of the shell 1. The return water net 24 is laid on the lower end of the stainless steel filter screen, and the outer periphery of the return water net 24 is arranged on the inner wall of the shell 1. The outlet of the return water net 24 is communicated with the sewage inlet of the water tank 4.

[0034] In order to increase the flow rate of ambient air and improve the efficiency of air processing, in the present embodiment, preferably, the air induced system 3 also includes a second contraction tube 35, a second throat tube 36 and an expansion tube 37 which are connected in sequence, and the air outlet of the expansion tube 37 is connected to the air inlet of the connecting tube 31.

[0035] In order to extend the service life of the device and improve the sewage discharge effect, in this embodiment, preferably, a one-way slope is provided at the bottom of the water tank 4, the water pump 5 is provided on the top of the one-way slope, and the foot of the one-way slope is connected to the water outlet of the water tank 4.

[0036] In order to improve the flexibility of the device and adapt to the needs of different working scenarios, in the present embodiment, preferably, the shell 1 includes a first shell 111, a second shell 121 and a third shell 131, the upper end of the second shell 121 is detachably connected to the lower end of the first shell 111, the lower end of the second shell 121 is detachably connected to the upper end of the third shell 131, the first shell 111 is provided with the connecting pipe 31, the first shell 111 is provided with the first shrink tube 32 and the first throat 33, the second shell 111 is provided with the filter element 2, the second shell 121 is provided with the air outlet, and the third shell 131 is provided with the water tank 4 and the water pump 5.

[0037] In order to achieve dynamic speed regulation of the water pump 5 and at the same time improve space utilization and reduce the size of the device, in the present embodiment, preferably, it also includes a detection module and a control module, wherein the detection module is arranged on the shell 1, and the control module is arranged outside the first throat pipe 33, and the control module is electrically connected to the detection module, the water pump 5 and the fan 34 respectively, and the control module is used to process the air quality data from the detection module and control the speed of the water pump 5 according to the processing result.

[0038] In order to realize automatic sewage discharge, in the present embodiment, preferably, a solenoid valve 41 is provided on the sewage outlet of the water tank 4, a float valve 42 is provided on the water inlet of the water tank 4, and the solenoid valve 41 is electrically connected to the control module.

[0039] In order to improve processing efficiency and optimize control effects, in the present embodiment, preferably, the control module includes a main control system and a flow controller, and the main control system and the flow controller are both arranged outside the first throat pipe 33, and the main control system is electrically connected to the detection module of the flow controller and the fan 34, respectively, and the flow controller is electrically connected to the water pump 5. In order to detect environmental abnormalities in a timely manner and improve user safety, in this embodiment, preferably, a toxic gas detection module and an alarm module are also included, and the toxic gas detection module and the alarm module are electrically connected, and the toxic gas detection module and the alarm module are both electrically connected to the control module.

[0040] Thus, beneficial effects are achieved: a vortex can be formed by the spiral stainless steel filter, which prolongs the contact time between the water mist and the ambient air, so that the water mist can absorb more dust and improve the air purification effect; a second venturi tube is formed by the second contraction tube 35, the expansion tube 37 and the second throat 36, and a double venturi tube structure is realized, so that the flow rate of the ambient air is further improved, the amount of ambient air is increased, and the mixing time of the water mist sprayed by the nozzle 6 after colliding with the ambient gas is extended, so that the dust in the ambient gas is better adsorbed and the air treatment efficiency is improved; through the one-way slope and the sewage outlet When discharging sewage, the water containing dust forms a directional flow, which can realize the automatic migration of dust to the sewage outlet; through the detachable way, the device can be quickly assembled, disassembled, transported and maintained, which improves the flexibility of the equipment; the speed regulation of the water pump 5 by the detection module and the control module can reduce energy consumption; the sewage outlet is opened and closed by the solenoid valve 41 and the control module, which can realize automatic sewage discharge and avoid the adverse effects of sediment deposition on the operation of the device; through the toxic gas detection module and the alarm module, environmental toxic gases can be detected in time and early warning can be issued, which improves the safety of users.

[0041] In one embodiment, the filter element 2 includes a stainless steel filter screen 21, a cover plate 22, an isolation plate 23 and a water return net 24. The stainless steel filter screen 21 is wound into a spiral shape along the central axis of the shell 1 and is arranged in the shell 1. The outer ring filter port of the stainless steel filter screen 21 is connected to the air outlet. The cover plate 22 is covered on the upper end of the stainless steel filter screen 21. The cover plate 22 is arranged below the first throat 33. An inlet is provided on the cover plate 22. The inlet is connected to the spiral hole of the stainless steel filter screen 21. The inlet and the outlet of the first throat 33 are arranged at intervals. The lower end of the isolation plate 23 is arranged on the outer periphery of the cover plate 22. The upper end of the isolation plate 23 is arranged on the inner wall of the shell 1. The water return net 24 is laid on the lower end of the stainless steel filter screen. The outer periphery of the water return net 24 is arranged on the inner wall of the shell 1. The outlet of the water return net 24 is connected to the sewage inlet of the water tank 4.

[0042] It should be noted that when the stainless steel filter 21 is wound into a spiral shape along the central axis of the shell 1, a spiral flow channel is formed in the stainless steel filter 21, which can generate eddies to the maximum extent, and use the water film formed on the surface of the stainless steel filter 21 to absorb smoke and dust; in order to achieve convenient connection, in this embodiment, preferably, the isolation plate 23 and the return water net 24 are respectively provided with a plurality of spring locks, and the shell is provided with a socket and a sealing ring corresponding to the spring locks; the isolation plate 23 can be composed of a plurality of plates spliced ​​together, or it can be a single plate. Thus, a multi-layer filtering channel is formed by the spiral stainless steel filter, which can form eddies, prolong the contact time between water mist and ambient air, and enable the water mist to absorb more dust, that is, enhance the dust collision capture effect, and improve the air purification effect.

[0043] In one embodiment, the air induction system 3 further includes a second contraction tube 35, a second throat 36 and an expansion tube 37 which are connected in sequence, and the air outlet of the expansion tube 37 is connected to the air inlet of the connecting tube 31. It should be noted that the second contraction tube 35, the expansion tube 37 and the second throat 36 form a second Venturi tube, and the first contraction tube, the first throat 33 and the shell 1 form a first Venturi tube, which realizes a double Venturi tube structure; in order to increase the contact area between the device and the ambient air, in this embodiment, preferably, the second contraction tube 35 is trumpet-shaped; in order to better collect gas, in this embodiment, preferably, the inlet of the second contraction tube 35 is perpendicular to the bottom surface; in order to more flexibly introduce ambient air, in this embodiment, preferably, the second throat 36 is a bellows, so that the second contraction tube 35 and the expansion tube 37 can move relative to each other; thus, by utilizing the physical structure of the device, the flow rate of the ambient air is further increased, the amount of ambient air is increased, so that the water mist sprayed by the nozzle 6 and the ambient gas collide and extend the mixing time, better adsorb the dust in the ambient gas, and further improve the air processing efficiency.

[0044] In one embodiment, a one-way slope is provided at the bottom of the water tank 4, the water pump 5 is provided on the top of the one-way slope, and the foot of the one-way slope is connected to the water outlet of the water tank 4. It should be noted that when sewage is discharged, the water containing dust moves along the slope of the one-way slope to the sewage outlet; in order to be more conducive to sewage discharge, in this embodiment, preferably, a V-shaped flow channel is provided on the one-way slope, and the extension direction of the V-shaped flow channel is consistent with the extension direction of the one-sided slope. In this way, dust can be automatically migrated to the sewage outlet to avoid deposition at the bottom of the water tank 4.

[0045] In one embodiment, the housing 1 includes a first housing 111, a second housing 121 and a third housing 131, the upper end of the second housing 121 is detachably connected to the lower end of the first housing 111, the lower end of the second housing 121 is detachably connected to the upper end of the third housing 131, the first housing 111 is provided with the connecting pipe 31, the first housing 111 is provided with the first shrink tube 32 and the first throat 33, the second housing 121 is provided with the filter element 2, the second housing 121 is provided with the air outlet, and the third housing 131 is provided with the water tank 4 and the water pump 5. It should be noted that, in order to achieve full sealing, in this embodiment, a plurality of spring locks and sealing rings are provided between the first housing 111, the second housing 121 and the third housing 131, and the first housing 111, the second housing 121 and the third housing 131 are provided with sockets. Therefore, through the detachable manner, the device has a simple structure, small size, light weight, and is easy to install (move), which enables rapid assembly, disassembly, transportation and maintenance of the device, thereby improving the flexibility and adaptability of the equipment.

[0046] In one embodiment, it also includes a detection module and a control module, wherein the detection module is arranged on the housing 1, and the control module is arranged outside the first throat 33. The control module is electrically connected to the detection module, the water pump 5 and the fan 34 respectively, and the control module is used to process the air quality data from the detection module and control the speed of the water pump 5 according to the processing result. It should be noted that the air quality data of the detection module includes but is not limited to welding smoke particle size, PM2.5 detection results, etc.; in order to improve space utilization and control effect, in this embodiment, preferably, the water pump 5 is a low-pressure variable frequency water pump 5, and the low-pressure variable frequency water pump 5 is arranged in the water tank 4; thus, the water pump 5 is dynamically adjusted based on the air quality data to achieve energy saving and improve space utilization.

[0047] In one embodiment, a solenoid valve 41 is provided on the sewage outlet of the water tank 4, a float valve 42 is provided on the water inlet of the water tank 4, and the solenoid valve 41 is electrically connected to the control module. It should be noted that when the water level is lower than the water level line, the float valve 42 automatically opens to achieve automatic water replenishment to meet the operation requirements of the water pump 5. Therefore, by opening and closing the sewage outlet through the solenoid valve 41 and the control module, automatic sewage discharge can be achieved to avoid adverse effects of sediment deposition on the operation of the device.

[0048] In one embodiment, the control module includes a main control system and a flow controller, the main control system and the flow controller are both arranged outside the first throat pipe 33, the main control system is electrically connected to the detection module of the flow controller and the fan 34, and the flow controller is electrically connected to the water pump 5. It should be noted that the flow controller is used to process the air quality data from the main control system and control the speed of the water pump 5 according to the processing results; the flow controller automatically adjusts the size and flow of the water mist by adjusting the speed of the water pump 5. In this way, the operation rate of the device is improved and the responsiveness of the device is improved.

[0049] In one embodiment, it also includes a toxic gas detection module and an alarm module, the toxic gas detection module and the alarm module are electrically connected, and the toxic gas detection module and the alarm module are both electrically connected to the control module. It should be noted that the detection targets of the toxic gas include but are not limited to combustible gas, carbon monoxide, hydrogen sulfide and carbon dioxide, etc.; when the toxic gas detection module detects toxic gas, the alarm module emits an audible and visual alarm; thereby, environmental toxic gases can be discovered in time and early warnings can be issued, thereby improving the safety of users. At the same time, it can integrate filtering, detection, and alarm, achieve energy conservation, environmental protection, economy and applicability, and can be applied to tunnel working environments.

[0050] In one embodiment, the number of the dust filters is multiple, and the multiple dust filters are arranged at intervals of 10 to 15 meters. It should be noted that in order to better purify the air, the dust filters can be moved with the tunnel footage. In this way, dust removal can be achieved in a large range, the air processing rate is increased, and the working environment is improved in a timely manner.

[0051] The second aspect of the present invention provides a working method of a dust filter, which is described in detail below.

[0052] A working method of a dust filter, based on the dust filter provided in the above embodiment, comprises: The water pump 5 introduces the water in the water tank 4 into the plurality of nozzles 6, and the plurality of nozzles 6 spray water in the first throat pipe 33 to form water mist; The fan 34 introduces ambient air into the connecting pipe 31, and the ambient air flows into the first throat pipe 33 after passing through the first contraction tube 32. The first contraction tube 32 and the first throat pipe 33 accelerate the ambient air so that the ambient air collides with the water mist and mixes into a mixed gas. The mixed gas flows out from the first throat pipe 33 and enters the filter element 2. The mixed gas condenses in the filter element 2 so that the mixed gas is separated into sewage and air. The air flows through the filter port of the filter element 2 and is discharged from the air outlet. The sewage falls into the water tank 4 for recovery, thereby completing one dust removal.

[0053] It should be noted that, in order to improve the efficiency of air processing, in the present embodiment, preferably, a plurality of the dust filters are arranged at intervals of 10 to 15 meters, and their positions are moved along with the tunnel progress.

[0054] Therefore, the working method of the dust filter of the present invention solves technical problems such as low air treatment efficiency in the prior art and achieves beneficial effects: by increasing the air flow rate and increasing the amount of ambient air, the water mist sprayed from the nozzle 6 prolongs the mixing time after colliding with the ambient gas, thereby better adsorbing the dust in the ambient gas and improving the air treatment efficiency. At the same time, by filtering the mixed air and then condensing the sewage, the separation time of the sewage and the air is shortened, further improving the efficiency of the gas treatment.

[0055] like Figure 1 As shown, an optional working process of the dust filter and the working method thereof in the present invention is as follows: The water inlet is opened, water enters the water tank 4, and after reaching the preset first water level, the float valve 42 closes the water inlet, the device is started, the detection module, the main control system, the flow controller, the water pump 5, the fan 34, the toxic gas detection module and the alarm module are all powered on, the detection module obtains real-time ambient air quality data, and the main control system obtains the device running time; The main control system sends the detection result of the detection module to the flow controller, and the flow controller analyzes the detection result and controls the rotation speed of the water pump 5 according to the analysis result. The water pump 5 introduces the water in the water tank 4 into the multiple nozzles 6, and the multiple nozzles 6 spray water in the first throat 33 to form water mist; The fan 34 collects ambient air through the second contraction tube 35 and introduces the ambient air into the second throat pipe 36. The second throat pipe 36 accelerates the ambient air once. The ambient air after the primary acceleration flows through the expansion tube 37, the connecting tube 31 and the first contraction tube 32 and then flows into the first throat pipe 33. The first throat pipe 33 accelerates the ambient air twice, so that the ambient air collides with the water mist and mixes into a mixed gas. The mixed gas flows into the spiral holes of the stainless steel filter mesh 21 through the inlet and flows along the surface of the stainless steel filter mesh 21. The sewage in the mixed gas condenses on the surface of the stainless steel filter mesh 21. The air in the mixed gas flows out from the filter port of the stainless steel filter mesh 21, so that the mixed gas is separated into sewage and air. After the air flows out of the filter port of the filter element 2, it is discharged from the air outlet. The sewage falls along the stainless steel filter mesh 21 and flows through the return water network 24 and then enters the water tank 4 for recovery, completing a dust removal. Among them, the main control system determines whether sewage discharge is needed based on the equipment operation time. When sewage discharge is needed, the main control system controls the solenoid valve 41 to open and the sewage is discharged. When the water level drops to the preset second water level, the float valve 42 opens the water inlet, and the water tank 4 is refilled with water to complete one sewage discharge.

[0056] It should be noted that the dust filter can be subjected to quality inspection: The dust filter of the present invention is used to compare the data with the existing equipment synchronously to verify whether the key components meet the expected requirements, and then make corrections and improvements; Assemble and test run the whole machine, check the matching degree of each system, and verify the filtering effect; The expected requirements include but are not limited to: ① Clean Air Volume (CADR) test: The actual measured value of the clean air volume of the purifier for particulate matter should not be less than 90% of the nominal value, and the actual measured value of the clean air volume of the purifier for gaseous pollutants should not be less than 90% of the nominal value; ② Removal rate test: The removal rate of the purifier for particulate matter, PM2.5 and other pollutants should meet the specified standards; ③Noise test: The sound power level noise during normal operation of the purifier should comply with relevant regulations.

[0057] In addition, the terms "first", "another" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" or "several" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "one example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0060] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust filter, characterized in that: include: A filter system, the filter system comprising a housing and a filter element, the housing being provided with an air outlet, the filter element being arranged in the housing, and the filter port of the filter element being communicated with the air outlet; An air induction system, the air induction system comprising a connecting pipe, a first shrinkable pipe, a first throat pipe and a fan, the connecting pipe is passed through the shell, the first shrinkable pipe and the first throat pipe are both arranged in the shell, the connecting pipe, the first shrinkable pipe and the first throat pipe are sequentially connected from top to bottom, the first throat pipe is arranged above the filter element and the air outlet of the first throat pipe is spaced from the inlet of the filter element, and the fan is passed through the connecting pipe; A water circulation system, the water circulation system includes a water tank, a water pump and a plurality of nozzles, the water tank is arranged in the shell, the water tank is arranged below the filter element and the sewage inlet of the water tank is spaced apart from the outlet of the filter element, the water pump is respectively connected to the water tank and the plurality of nozzles, and the plurality of nozzles are arranged in a ring in the first throat pipe.

2. The dust filter according to claim 1, characterized in that: The filter element comprises a stainless steel filter screen, a cover plate, an isolation plate and a return water net. The stainless steel filter screen is wound into a spiral shape along the central axis of the shell and is arranged in the shell. The outer ring filter port of the stainless steel filter screen is connected to the air outlet. The cover plate is arranged on the upper end of the stainless steel filter screen. The cover plate is arranged below the first throat pipe. An inlet is arranged on the cover plate, and the inlet is connected to the spiral hole of the stainless steel filter screen. The inlet and the outlet of the first throat pipe are arranged at intervals. The lower end of the isolation plate is arranged on the outer periphery of the cover plate, and the upper end of the isolation plate is arranged on the inner wall of the shell. The return water net is laid on the lower end of the stainless steel filter screen, and the outer periphery of the return water net is arranged on the inner wall of the shell. The outlet of the return water net is connected to the sewage inlet of the water tank.

3. The dust filter according to claim 1, characterized in that: The air induction system further includes a second contraction tube, a second throat tube and an expansion tube which are connected in sequence, and an air outlet of the expansion tube is connected to an air inlet of the connecting tube.

4. The dust filter according to claim 1, characterized in that: A one-way slope is arranged at the bottom of the water tank, the water pump is arranged on the top of the one-way slope, and the foot of the one-way slope is connected to the water outlet of the water tank.

5. The dust filter according to claim 1, characterized in that: The shell includes a first shell, a second shell and a third shell, the upper end of the second shell is detachably connected to the lower end of the first shell, the lower end of the second shell is detachably connected to the upper end of the third shell, the connecting pipe is passed through the first shell, the first shrink tube and the first throat are arranged in the first shell, the filter element is arranged in the second shell, the air outlet is arranged on the second shell, and the water tank and the water pump are arranged in the third shell.

6. The dust filter according to claim 1, characterized in that: It also includes a detection module and a control module, the detection module is installed on the shell, the control module is installed outside the first throat, the control module is electrically connected to the detection module, the water pump and the fan respectively, and the control module is used to process the air quality data from the detection module and control the rotation speed of the water pump according to the processing result.

7. The dust filter according to claim 6, characterized in that: A solenoid valve is provided on the sewage outlet of the water tank, a float valve is provided on the water inlet of the water tank, and the solenoid valve is electrically connected to the control module.

8. The dust filter according to claim 6, characterized in that: The control module includes a main control system and a flow controller, both of which are arranged outside the first throat pipe. The main control system is electrically connected to the flow controller, the detection module and the fan respectively, and the flow controller is electrically connected to the water pump.

9. The dust filter according to claim 6, characterized in that: It also includes a toxic gas detection module and an alarm module, the toxic gas detection module and the alarm module are electrically connected, and the toxic gas detection module and the alarm module are both electrically connected to the control module.

10. A method for operating a dust filter, characterized in that: The dust filter according to claims 1 to 9 comprises: The water pump introduces the water in the water tank into the plurality of nozzles, and the plurality of nozzles spray water in the first throat pipe to form water mist; The fan introduces ambient air into the connecting pipe, and the ambient air flows into the first throat after passing through the first contraction tube. The first contraction tube and the first throat accelerate the ambient air, so that the ambient air collides with the water mist and mixes into a mixed gas. The mixed gas flows out from the first throat and enters the filter element. The mixed gas condenses in the filter element, so that the mixed gas is separated into sewage and air. The air flows through the filter port of the filter element and is discharged from the air outlet, and the sewage falls into the water tank for recovery, thereby completing one dust removal.

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