Dust-containing air flow purification device, and dust-containing air flow purification system for excavation roadway

Abstract

A dust-containing air flow purification device, and a dust-containing air flow purification system for an excavation roadway. The purification device comprises a purification water tank (100), wherein an air output end of an air intake pipe (110) is lower than a set lowest water level of the purification water tank (100), and an air intake end of an air output pipe (120) is higher than a set highest water level of the purification water tank (100); and the bottom of the purification water tank (100) is further connected to a sludge remover device (200). The sludge remover device (200) comprises a sludge removing bin (210) and a filter-press piston (230) disposed in the sludge removing bin (210), wherein the sludge removing bin (210) is provided with a sludge discharging pipe (240), and the sludge discharging pipe (240) is provided with an automatic on-off sludge discharge valve (250). When the pressure of a sludge slurry in the sludge discharging pipe (240) is greater than a set pressure of the automatic on-off sludge discharge valve (250) under the action of the filter-press piston (230), the automatic on-off sludge discharge valve (250) automatically opens a sludge discharging port of the sludge discharging pipe (240); otherwise, the automatic on-off sludge discharge valve (250) automatically blocks the sludge discharging port.

Description

Dust-laden airflow purification device and dust-laden airflow purification system for tunneling tunnels Technical Field

[0001] The present invention relates to the technical field of mine roadway or tunnel ventilation, dust removal and toxic and harmful gas prevention and control, and in particular to a dust-laden airflow purification device and a dust-laden airflow purification system for an excavation roadway. Background Art

[0002] At present, the airflow purification in the excavation tunnels during the construction of mine tunnels or tunnels at home and abroad mainly relies on ventilation. Among them, if the full wind pressure ventilation method is adopted, as the excavation distance increases, it is necessary to set up longitudinal wind barriers or use air guides in the tunnel, which is inconvenient to construct and has large air leakage. If local fans are used for ventilation, the equipment and workers are exposed to polluted air during pressure ventilation, which has a serious impact on the health and safety of the workers. During exhaust ventilation, since the airflow contains toxic and harmful gases, high concentrations can easily induce explosion accidents. If diffusion ventilation is used, the wind pressure and action distance generated by diffusion ventilation are relatively small, so it cannot meet the ventilation requirements over long distances.

[0003] In addition, as an aspect of purification, the existing technology also adopts the method of injecting water into the coal seam or using a dust removal fan to remove dust from the airflow in the excavation roadway or tunnel. The former is relatively cumbersome to implement and can only reduce the amount of dust produced, while the latter can only reduce the dust in the head roadway, but the dust concentration in the rear roadway increases.

[0004] In summary, the existing airflow purification methods or equipment use water injection to reduce dust or transfer dust and toxic and harmful gases. The dust reduction effect is limited and cannot effectively eliminate acidic (alkaline) toxic and harmful gases in lanes or tunnels, which is not environmentally friendly. Summary of the Invention

[0005] The first purpose of the present invention is to provide a dust-laden airflow purification device to solve the technical problems in the existing technology that the airflow purification method or equipment uses water injection to reduce dust or transfer dust and toxic and harmful gases, which has limited dust reduction effect and cannot effectively eliminate acidic (alkaline) toxic and harmful gases in lanes or tunnels, and is not environmentally friendly.

[0006] The dust-laden airflow purification device provided by the present invention comprises a purified water bin, which is provided with an air inlet pipe and an air outlet pipe, the air outlet end of the air inlet pipe is lower than the set minimum water level of the purified water bin, and the air inlet end of the air outlet pipe is higher than the set maximum water level of the purified water bin; the bottom of the purified water bin is also connected to a slag removal device, which comprises a slag removal bin and a filter press piston arranged in the slag removal bin, the filter press piston is used to squeeze and filter the mud slurry in the slag removal bin; the slag removal bin is provided with a slag discharge pipe, and the slag discharge pipe is provided with a self-opening and closing slag discharge valve, when, under the action of the filter press piston, the pressure of the mud slurry in the slag discharge pipe is greater than the set pressure of the self-opening and closing slag discharge valve, the self-opening and closing slag discharge valve automatically opens the slag discharge port of the slag discharge pipe; otherwise, the self-opening and closing slag discharge valve automatically blocks the slag discharge port.

[0007] Furthermore, the self-opening and closing slag discharge valve includes a support seat and a sealing member and an elastic member arranged on the support seat. The sealing member is movably arranged on the support seat, and the elastic member is arranged between the support seat and the sealing member, so that the sealing member is sealed at the slag discharge port at a set pressure.

[0008] Furthermore, the sealing member includes an L-shaped rod and a plug arranged at one end of the L-shaped rod, and the elastic member is arranged at the other end of the L-shaped rod; the L-shaped rod is rotatably arranged at the fulcrum of the support seat, the rotation axis of the L-shaped rod is perpendicular to the axis of the slag discharge pipe, and the plug and the elastic member are respectively located on both sides of the fulcrum.

[0009] Furthermore, the filter press piston includes a piston rod, a piston disc and a filter pad arranged on the lower side of the piston disc. A mounting shaft is vertically fixed to the bottom of the piston rod. The piston disc includes a first piston disc and a second piston disc, both of which are provided with water-permeable holes, are hinged to the mounting shaft and are respectively located on both sides of the mounting shaft; a limiting member is also provided at the bottom of the piston rod, and when the filter press piston moves downward, the limiting member prevents the first piston disc and the second piston disc from flipping upward.

[0010] Furthermore, a slurry inlet is provided on the side of the deslagging bin, and the slurry inlet is connected to the slurry outlet of the purified water bin. When the filter press piston is in the standby state, its position is higher than the slurry inlet.

[0011] Furthermore, a slurry discharge pipe is provided at the bottom of the deslagging bin for discharging the liquid or mud slurry in the purification device.

[0012] Furthermore, the purification device further comprises a circulating water tank, which is connected to the purified water tank and a filter is provided between the two, for preventing dust and mud in the purified water tank from entering the circulating water tank;

[0013] The circulating water tank is connected to a spray device; the spray device includes a first nozzle, the air inlet pipe is inclined, the first nozzle is arranged on the air inlet pipe, and is used to spray water to the air flow flowing through the air inlet pipe; and / or the spray device includes a second nozzle, the air outlet pipe is inclined, and the second nozzle is arranged on the air outlet pipe, and is used to spray water to the air flow flowing through the air outlet pipe.

[0014] Furthermore, the purification device also includes a neutralization silo, the purified water silo and the neutralization silo are connected by a first feeding pipe, and the first feeding pipe is provided with a first feeding device for adding the neutralization material in the neutralization silo into the purified water silo to neutralize the acidity / alkalinity of the gas entering the purified water silo.

[0015] Furthermore, the purification device also includes a flocculant tank, the purified water tank and the flocculant tank are connected through a second feeding pipe, and the second feeding pipe is provided with a second feeding device for adding the flocculant in the flocculant tank into the purified water tank to accelerate the sedimentation of dust in the purified water tank.

[0016] Furthermore, the purification device further comprises a stirring device, which is used to stir the water in the purified water tank to accelerate the diffusion of the neutralizing material and the flocculant and the precipitation of the sludge.

[0017] Furthermore, a bypass pipe is connected between the air inlet pipe and the air outlet pipe, and the bypass pipe is provided with a bypass valve.

[0018] The dust-laden airflow purification device provided by the present invention can produce the following beneficial effects:

[0019] The dust-laden airflow purification device provided by the present invention can be used to add an appropriate amount of water and a substance capable of neutralizing acidic (alkaline) toxic and harmful gases into the purified water tank to prepare an absorption liquid, or directly add the acidic (alkaline) toxic and harmful gas absorption liquid. The airflow containing dust and acidic (alkaline) toxic and harmful gases enters the liquid in the purified water tank from the air inlet pipe. After being washed by the liquid in the purified water tank, the dust in the airflow remains in the water, and the toxic and harmful gases in the airflow are neutralized and absorbed, and then flow out through the air outlet pipe. The dust in the purified water tank settles to the bottom of the purified water tank and then enters the slag removal device. Under the squeezing and filtering action of the filter press piston, the concentration of the sludge slurry increases further. When the pressure of the sludge slurry in the slag discharge pipe is greater than the set pressure of the self-opening and closing slag discharge valve, the self-opening and closing slag discharge valve automatically opens, and the sludge is discharged from the slag discharge port of the slag discharge pipe; when the force of the sludge slurry in the slag discharge pipe acting on the self-opening and closing slag discharge valve is less than the set pressure of the self-opening and closing slag discharge valve, the self-opening and closing slag discharge valve automatically closes the slag discharge port of the slag discharge pipe.

[0020] In summary, the dust-laden wind flow purification device provided by the present invention can remove dust from the wind flow by means of a gas water bath, and can automatically discharge slag, thereby enabling timely slag discharge, so that the purification device can continuously ensure the purification effect. In addition, if a neutralizing liquid is added to the purification water tank, it can not only remove dust from the wind flow, but also neutralize and absorb toxic and harmful gases in the wind flow. That is, the dust-laden wind flow purification device provided by the present invention truly removes dust and toxic and harmful gases from the dust-laden wind flow, purifies the wind flow more thoroughly, and effectively avoids the damage of the purified gas to the air environment elsewhere.

[0021] The second purpose of the present invention is to provide a dust-laden airflow purification system for an excavation tunnel, so as to solve the technical problems in the prior art that the airflow purification methods or equipment use water injection to reduce dust or transfer dust and toxic and harmful gases, which have limited dust reduction effects and cannot effectively eliminate acidic (alkaline) toxic and harmful gases in tunnels or tunnels, and are not environmentally friendly.

[0022] The present invention provides a dust-laden airflow purification system for tunneling tunnels, comprising the aforementioned dust-laden airflow purification device and a pipeline. The purification device is disposed within the tunneling tunnel, and the pipeline comprises an air intake section and an exhaust section. One end of the air intake section is disposed at the entrance of the tunneling tunnel, and the other end is connected to the air intake pipe of the purification device. One end of the exhaust section is connected to the air outlet pipe of the purification device, and the other end is disposed within the return air lane. This purification system possesses all the advantages of the aforementioned dust-laden airflow purification device, and therefore will not be further elaborated here.

[0023] Furthermore, the purification system further includes an air suction pump, which is arranged in the pipeline and is located downstream of the purification device along the flow direction of the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] FIG1 is a schematic structural diagram of a dust-laden airflow purification device provided by an embodiment of the present invention;

[0026] FIG2 is a schematic structural diagram of a slag removal bin of a dust-laden airflow purification device provided by an embodiment of the present invention;

[0027] FIG3 is a schematic structural diagram of a self-opening and closing slag discharge valve in a slag removal bin of a dust-laden airflow purification device provided by an embodiment of the present invention;

[0028] FIG4 is a schematic diagram of the exploded structure of the filter press piston in the slag removal bin of the dust-laden airflow purification device provided by an embodiment of the present invention;

[0029] FIG5 is a schematic diagram of the assembly structure of the filter press piston in the slag removal bin of the dust-laden airflow purification device provided by an embodiment of the present invention;

[0030] FIG6 is a schematic diagram of a tunneling tunnel pumping airflow purification system provided by an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 100-purified water tank; 110-inlet pipe; 111-air inlet; 112-inlet valve; 113-screen tube;

[0033] 120- outlet pipe; 121- outlet port; 122- outlet valve;

[0034] 130-Bypass pipe; 131-Bypass valve;

[0035] 140-water supply pipe; 141-water supply valve;

[0036] 150-slurry discharge pipe; 151-slurry discharge valve;

[0037] 160-card slot; 161-filter element;

[0038] 200 - slag removal device; 210 - slag removal bin; 220 - slurry inlet pipe; 230 - filter press piston; 240 - slag discharge pipe; 241 - inspection valve; 250 - self-opening and closing slag discharge valve; 260 - slurry discharge pipe; 261 - slurry discharge valve; 270 - first drive member;

[0039] 231 - piston rod; 232 - first piston disc; 2321 - first connecting tooth; 2322 - water permeable hole; 2323 - first fixing hole; 233 - second piston disc; 2331 - second connecting tooth; 234 - mounting shaft; 235 - filter pad; 2351 - second fixing hole; 236 - fixing piece; 237 - limit piece;

[0040] 251-support seat; 252-L-shaped rod; 253-connecting pin; 254-elastic member; 255-plug;

[0041] 300-circulating water tank; 310-spray water pipe; 320-water outlet valve; 330-spray pump; 341-first nozzle; 342-second nozzle;

[0042] 400-neutralization silo; 410-first feeding pipe; 420-first feeding device;

[0043] 500-flocculant tank; 510-second feeding pipe; 520-second feeding device;

[0044] 600- stirring wheel; 610- wheel shaft; 620- second driving member;

[0045] 710- turbidity sensor; 720- pH sensor; 730- liquid level sensor;

[0046] 011-air intake section; 012-dust air flow purification device; 013-air pump; 014-exhaust section;

[0047] 021-intake tunnel; 022-excavation tunnel; 023-headway; 024-connecting tunnel; 025-adjustable wind window; 026-return air tunnel;

[0048] A-first position of the filter press piston; A'-second position of the filter press piston. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] The present embodiment provides a dust-laden airflow purification device, as shown in FIG1 , which includes a purified water tank 100, which is provided with an air inlet pipe 110 and an air outlet pipe 120, the air outlet end of the air inlet pipe 110 is lower than the set minimum water level of the purified water tank 100, and the air inlet end of the air outlet pipe 120 is higher than the set maximum water level of the purified water tank 100; the bottom of the purified water tank 100 is also connected to a slag removal device 200, which includes a slag removal bin 210 and a slag removal device 200 provided in the slag removal bin 210. 0, the filter press piston 230 is used to squeeze and filter the mud slurry in the slag removal bin 210; the slag removal bin 210 is provided with a slag discharge pipe 240, and the slag discharge pipe 240 is provided with a self-opening and closing slag discharge valve 250. When the pressure of the mud slurry in the slag discharge pipe 240 is greater than the set pressure of the self-opening and closing slag discharge valve 250 under the action of the filter press piston 230, the self-opening and closing slag discharge valve 250 automatically opens the slag discharge port of the slag discharge pipe 240; otherwise, the self-opening and closing slag discharge valve 250 automatically blocks the slag discharge port.

[0051] The dust-laden airflow purification device provided in this embodiment can be used to add an appropriate amount of water or other liquid capable of neutralizing acidic and alkaline toxic and harmful gases into the purified water tank 100. The airflow containing dust and acidic and alkaline toxic and harmful gases enters the air inlet pipe 110 from the air inlet port 111 of the air inlet pipe 110, and enters the liquid in the purified water tank 100 through the air inlet pipe 110. After being washed by the liquid in the purified water tank 100, the dust in the airflow remains in the water, and the toxic and harmful gases in the airflow are neutralized and absorbed, and then flow out from the air outlet port 121 through the air outlet pipe 120; and the purified water tank 10 0 settles to the bottom of the purified water tank 100 and then enters the slag removal device 200. Under the squeezing and filtering action of the filter press piston 230, the concentration of the sludge slurry further increases. When the pressure of the sludge slurry in the slag discharge pipe 240 is greater than the set pressure of the self-opening and closing slag discharge valve 250, the self-opening and closing slag discharge valve 250 automatically opens, and the sludge is discharged from the slag discharge port of the slag discharge pipe 240; when the force of the sludge slurry in the slag discharge pipe 240 acting on the self-opening and closing slag discharge valve 250 is less than the set pressure of the self-opening and closing slag discharge valve 250, the self-opening and closing slag discharge valve 250 automatically closes the slag discharge port of the slag discharge pipe 240.

[0052] In summary, the dust-laden wind flow purification device provided in this embodiment can remove dust from the wind flow by means of a water bath, and can automatically discharge slag, thereby enabling timely slag discharge, so that the purification device can continuously ensure the purification effect. In addition, if a neutralizing liquid is added to the purification water tank 100, it can not only remove dust from the wind flow, but also neutralize and absorb toxic and harmful gases in the wind flow. That is, the dust-laden wind flow purification device provided in this embodiment truly removes dust and toxic and harmful gases from the dust-laden wind flow, purifies the wind flow more thoroughly, and effectively avoids the damage of the purified gas to the air environment elsewhere.

[0053] Specifically, in this embodiment, as shown in Figure 1 , the outlet end of the air inlet pipe 110 is a screen tube 113, which is provided with multiple air outlet holes. This arrangement facilitates the dispersed discharge of air into the liquid in the purified water tank 100, thereby increasing the contact area between the gas and the liquid, and further improving the dust removal and neutralization purification of the gas.

[0054] Specifically, in this embodiment, as shown in FIG1 , the air inlet pipe 110 is provided with an air inlet valve 112 for controlling air inlet; the air outlet pipe 120 is provided with an air outlet valve 122 for controlling air outlet.

[0055] Specifically, in this embodiment, as shown in FIG2 , the self-opening and closing slag discharge valve 250 includes a support seat 251, a sealing member and an elastic member 254 disposed on the support seat 251. The sealing member is movably disposed on the support seat 251, and the elastic member 254 is disposed between the support seat 251 and the sealing member, and enables the sealing member to seal the slag discharge port at a set pressure. When the pressure of the slag slurry in the slag discharge pipe 240 exceeds the set pressure, the slag slurry in the slag discharge pipe 240 can overcome the elastic force of the elastic member 254 and push the sealing member away from the slag discharge port, thereby discharging the slag from the discharge port. When the pressure of the slag slurry in the slag discharge pipe 240 cannot overcome the elastic force of the elastic member 254 and cannot push the sealing member away, the sealing member will remain in the state of blocking the slag discharge port or return to the state of blocking the slag discharge port. In other words, the purification device provided in this embodiment utilizes the elastic force of the elastic member 254 to achieve the function of automatically opening and closing the slag discharge port to automatically discharge slag.

[0056] 2 and 3 , the support seat 251 is disposed on the slag discharge pipe 240. However, in other embodiments of the present application, the support seat 251 may also be disposed at other locations of the slag removal bin 210, for example, the support seat 251 may also be disposed on the bin body of the slag removal bin 210.

[0057] Specifically, in this embodiment, the support seat 251 is a support rod, which has a simple structure and occupies a small space.

[0058] Specifically, in this embodiment, as shown in FIG3 , the sealing member includes an L-shaped rod 252 and a plug 255 disposed at one end of the L-shaped rod 252, and an elastic member 254 disposed at the other end of the L-shaped rod 252. The L-shaped rod 252 is rotatably disposed at a fulcrum of the support seat 251, with the rotation axis of the L-shaped rod 252 perpendicular to the axis of the slag discharge pipe 240. The plug 255 and the elastic member 254 are located on either side of the fulcrum. The support seat 251 provides a fulcrum for the L-shaped rod 252, and the elastic member 254 applies a force to the L-shaped rod 252 on one side of the fulcrum, causing the L-shaped rod 252 to rotate about the fulcrum. This allows the end of the L-shaped rod 252 provided with the plug 255 to seal the plug 255 against the slag discharge port.

[0059] Specifically, in this embodiment, the elastic member 254 is a compression spring. However, in other embodiments of the present application, the elastic member 254 is not limited to a compression spring. For example, the elastic member 254 can also be a rubber block, etc., as long as it can provide elastic force to enable the plug 255 to be sealed at the slag discharge port at a set pressure.

[0060] Specifically, in this embodiment, the material of the plug 255 is preferably elastic rubber or plastic, etc., which is conducive to maintaining the sealing of the slag discharge port.

[0061] Specifically, in this embodiment, as shown in Figure 3, the fulcrum is located at the corner of the L-shaped rod 252. However, in other embodiments of the present application, the position of the fulcrum is not limited to this, but can also be located at one of the rod portions constituting the L-shaped rod 252. For example, the fulcrum can also be located at the rod portion of the L-shaped rod 252 connected to the elastic member 254.

[0062] Specifically, in this embodiment, the support rod is fixed to the slag discharge pipe 240 by welding, snaps or bolts; and the support rod and the L-shaped rod 252 are both provided with connecting holes, and the two are connected by a connecting pin 253. Of course, they can also be connected by bolts or rivets.

[0063] Specifically, in this embodiment, as shown in Figures 4 and 5, the filter press piston 230 includes a piston rod 231, a piston disc and a filter pad 235 arranged on the lower side of the piston disc. A mounting shaft 234 is vertically fixed to the bottom of the piston rod 231. The piston disc includes a first piston disc 232 and a second piston disc 233. Both are provided with water-permeable holes 2322, are hinged to the mounting shaft 234 and are respectively located on both sides of the mounting shaft 234; a limiting member 237 is also provided at the bottom of the piston rod 231. When the filter press piston 230 moves downward, the limiting member 237 prevents the first piston disc 232 and the second piston disc 233 from flipping upward. When in standby mode, the piston disc of the filter press piston 230 is located at the upper part of the silo body; when deslagging is working, the filter press piston 230 moves downward, and the piston rod 231 and the piston disc form an inverted "T" shape. The slag and water of the mud slurry in the silo body are separated by the action of the piston disc and the filter pad 235. The water in the slurry reaches the top of the piston disc through the filter pad 235 and the water-permeable hole 2322, and the mud in the slurry is compacted to the bottom of the silo body and discharged to the outside of the silo body through the slag discharge pipe 240 and the self-opening and closing slag discharge valve 250; when the filter press piston 230 moves upward, the first piston disc 232 and the second piston disc 233 can form a certain angle, presenting a shape similar to an inverted "Y", so that the mud on the upper part of the piston disc can fall to the bottom of the silo body from the gap between the piston disc and the silo body.

[0064] Specifically, in this embodiment, as shown in Figure 4, the bottom of the piston rod 231 is provided with a socket perpendicular to its axis, and the first piston disc 232 is provided with a plurality of first connecting teeth 2321, and the first connecting teeth 2321 are all provided with a first connecting hole; the second piston disc 233 is provided with a plurality of second connecting teeth 2331, and the second connecting teeth 2331 are all provided with a second connecting hole; after the socket of the piston rod 231 and the first connecting hole and the second connecting hole are placed in the installation position, the installation shaft 234 passes through each hole in turn to complete the assembly of the piston rod 231, the installation shaft 234, the first piston disc 232 and the second piston disc 233.

[0065] Specifically, in this embodiment, the filter pad 235 can be a fiber pad.

[0066] Specifically, in this embodiment, the first piston disc 232 and the second piston disc 233 are both provided with a plurality of first fixing holes 2323, and the filter pad 235 is correspondingly provided with a plurality of second fixing holes 2351. The fixing member 236 passes through the corresponding first fixing holes 2323 and the second fixing holes 2351, thereby fixing the filter pad 235 to the piston disc. More specifically, the fixing member 236 can be a bolt or a rivet, etc., as long as it can fix the filter pad 235 and the piston disc.

[0067] Specifically, in this embodiment, as shown in FIG1 , the slag removal device 200 further includes a first driving member 270 , which drives the filter press piston 230 to reciprocate through the piston rod 231 . The first driving member 270 may be a hydraulic cylinder, a pneumatic cylinder, or a linear motor.

[0068] Specifically, in this embodiment, a maintenance valve 241 is further provided on the slag discharge pipe 240. When the self-opening and closing slag discharge valve 250 is inspected, the maintenance valve 241 is closed; and when the self-opening and closing slag discharge valve 250 is working, the maintenance valve 241 is in an open state.

[0069] Specifically, in this embodiment, as shown in FIG2 , a slurry inlet is provided on the side of the sludge removal bin 210, which is connected to the slurry outlet of the purified water bin 100. When the filter press piston 230 is in the standby state, its position is higher than the slurry inlet. This arrangement ensures that when the filter press piston 230 is in the standby position, it does not affect the entry of the sludge slurry into the bin.

[0070] Specifically, in this embodiment, as shown in Figures 1 and 2, the slurry outlet of the purified water tank 100 is provided with a slurry outlet pipe 150, and the slurry inlet of the slag removal tank 210 is provided with a slurry inlet pipe 220. The slurry inlet pipe 220 is connected to the slurry outlet pipe 150 of the purified water tank 100, and the slurry outlet pipe 150 is also provided with a slurry outlet valve 151.

[0071] Specifically, in this embodiment, as shown in Figure 2 , a slurry discharge pipe 260 is further provided at the bottom of the deslagging bin 210 for draining the liquid or sludge slurry within the purification device. When the deslagging bin 210 or the purification device as a whole requires maintenance or water replacement, the remaining water and sludge slurry within the system can be drained through the slurry discharge pipe 260.

[0072] More specifically, in this embodiment, a slurry discharge valve 261 is further provided on the slurry discharge pipe 260 .

[0073] Specifically, in this embodiment, as shown in Figure 1, the purification device also includes a circulating water tank 300, which is connected to the purified water tank 100 and a filter element 161 is provided between the two, for preventing dust and mud in the purified water tank 100 from entering the circulating water tank 300; the circulating water tank 300 is connected to a spray device; the spray device includes a first nozzle 341, the air inlet pipe 110 is tilted, and the first nozzle 341 is provided on the air inlet pipe 110, for spraying water to the air flow flowing through the air inlet pipe 110; the spray device includes a second nozzle 342, the air outlet pipe 120 is tilted, and the second nozzle 342 is provided on the air outlet pipe 120, for spraying water to the air flow flowing through the air outlet pipe 120. The filter element 161 is water-permeable and can be, for example, a filter mesh, which blocks dust and mud in the water in the purified water tank 100 within the purified water tank 100, thereby maintaining the water quality of the circulating water tank 300 clean, thereby improving the spray effect of the first nozzle 341 and the second nozzle 342 and the service life of the first nozzle 341 and the second nozzle 342. The spray device removes dust and absorbs toxic gases through spraying.

[0074] Specifically, in this embodiment, the purified water tank 100 is provided with a slot 160 , and the filter is disposed in the slot 160 .

[0075] Specifically, in this embodiment, as shown in FIG1 , the spray device further includes a spray pump 330 and a spray water pipe 310 . A first nozzle 341 and a second nozzle 342 are also disposed on the spray water pipe 310 . The spray pump 330 pumps water into the spray water pipe 310 . During operation, water from the purified water tank 100 is filtered by the filter element 161 and then enters the circulating water tank 300 . After being pumped out by the spray pump 330 , the water from the circulating water tank 300 reaches the first nozzle 341 and the second nozzle 342 through the spray water pipe 310 and is sprayed out, absorbing dust and acidic / alkaline toxic gases in the gas. The water then flows back to the purified water tank 100 along the air inlet pipe 110 or the air outlet pipe 120 by gravity, thereby completing the water cycle.

[0076] Specifically, in this embodiment, the water outlet of the circulating water tank 300 is further provided with a water outlet valve 320. When the spray pump 330 and each nozzle are to be inspected and repaired, the water outlet valve 320 can be closed.

[0077] Specifically, in this embodiment, the circulating water tank 300 can be separated from the purified water tank 100. Of course, the circulating water tank 300 can also be provided separately.

[0078] It should be noted here that in other embodiments of the present application, only one of the first nozzle 341 and the second nozzle 342 may be set, for example: only the first nozzle 341 is set on the air inlet pipe 110 to perform preliminary purification on the airflow entering the purified water tank 100; or, only the second nozzle 342 is set on the air outlet pipe 120 to purify the discharged airflow again to ensure the purification effect of the airflow.

[0079] Specifically, in this embodiment, as shown in FIG1 , the purification device further includes a neutralization silo 400. The purified water silo 100 and the neutralization silo 400 are connected via a first feeding pipe 410. The first feeding pipe 410 is equipped with a first feeding device 420 for adding neutralizing material from the neutralization silo 400 to the purified water silo 100 to neutralize the acidity / alkalinity of the gas entering the purified water silo 100. The purified water silo 100 is also equipped with a pH sensor 720 for monitoring the pH of the water in the purified water silo 100. When the harmful gases emanating from the excavation roadway 022 or tunnel contain water-soluble acidic gases such as hydrogen sulfide (H2S), sulfur dioxide (SO2), and nitrogen dioxide (NO2), the neutralizing material can be an alkaline substance such as sodium carbonate (Na2CO3), calcium hydroxide (Ca(OH)2), sodium bicarbonate (NaHCO3), or a mixture thereof. When harmful gases emanating from the excavation tunnel 022 or tunnel contain alkaline gases such as ammonia (NH3), neutralizing agents such as phosphoric acid (H3PO4), hydrochloric acid (HCl), and sulfuric acid (H2SO4) can be used. During operation, the pH sensor 720 monitors the pH of the water in the purified water tank. When the pH falls below the set pH, the first feeding device 420 is activated, and the neutralizing material in the neutralization tank 400 is added to the purified water tank 100.

[0080] Specifically, in this embodiment, as shown in Figure 1, the purification device further includes a flocculant tank 500. The purified water tank 100 and the flocculant tank 500 are connected via a second feeding pipe 510. The second feeding pipe 510 is equipped with a second feeding device 520 for adding flocculant from the flocculant tank 500 to the purified water tank 100 to accelerate the settling of dust within the purified water tank 100. The purified water tank 100 is also equipped with a turbidity sensor 710 for monitoring the concentration of dust and sludge in the water within the purified water tank 100. During operation, the turbidity sensor 710 monitors the concentration of dust and sludge in the water within the purified water tank 100. When the concentration of dust and sludge in the water exceeds a set concentration, the second feeding device 520 is opened, and the flocculant from the flocculant tank 500 is added to the purified water tank 100. Dust and sludge in the water within the purified water tank 100 then settle downward and enter the sludge removal bin through the slurry discharge pipe 150, where the dust and sludge are collected.

[0081] Preferably, in this embodiment, the bottom of the purified water tank 100 is configured as an inclined pointed bottom, and the slurry discharge pipe 150 is disposed at the lowest position of the purified water tank 100 .

[0082] Specifically, in this embodiment, as shown in FIG1 , the purification device further includes a stirring device, which is used to stir the water in the purified water tank 100 to accelerate the diffusion of the neutralizing material and the flocculant and the precipitation of the sludge.

[0083] More specifically, in this embodiment, the stirring device includes a second drive member 620 and a stirring wheel 600. The stirring wheel 600 is disposed within the purified water tank 100 via a wheel shaft 610 and can be submerged in the water in the purified water tank 100. The second drive member 620 drives the stirring wheel 600 to rotate via the wheel shaft 610. When a neutralizing material or flocculant is added to the purified water tank 100, the stirring device is activated. The second drive member 620 drives the stirring wheel 600 via the wheel shaft 610 to stir the water in the purified water tank 100, thereby accelerating the mixing of the neutralizing material or flocculant with the water. The second drive member 620 can be an electric motor or a motor. Of course, the second drive member 620 can also be omitted and directly rotated manually.

[0084] Specifically, in this embodiment, as shown in Figure 1 , a bypass pipe 130 is further connected between the air inlet pipe 110 and the air outlet pipe 120. Bypass pipe 130 is provided with a bypass valve 131. When the dust-laden airflow purification device requires maintenance, the air inlet valve 112 mounted on the air inlet pipe 110 and the air outlet valve 122 mounted on the air outlet pipe 120 are closed, and the bypass valve 131 mounted on the bypass pipe 130 is opened. This shuts off the operation of the dust-laden airflow purification device, allowing airflow to flow through the bypass pipe 130, allowing the dust-laden airflow purification device to be repaired. Preferably, the dust-laden airflow purification device is provided with an inspection port (not shown).

[0085] Specifically, in this embodiment, as shown in FIG1 , the purified water tank 100 is further provided with a water supply pipe 140 for adding water. The purified water tank 100 is also provided with a liquid level sensor 730. When the water level is lower than a preset level, the water supply valve 141 on the water supply pipe 140 is opened to add water to the purified water tank 100.

[0086] This embodiment also provides a system for purifying dust-laden airflow in a tunneling tunnel. As shown in FIG6 , the system includes the aforementioned dust-laden airflow purification device and a pipeline. The purification device is disposed within tunneling tunnel 022. The pipeline includes an air intake section 011 and an air exhaust section 014. One end of air intake section 011 is disposed at the front 023 of tunneling tunnel 022, and the other end is connected to the air intake pipe 110 of the purification device. One end of air exhaust section 014 is connected to the air outlet pipe 120 of the purification device, and the other end is disposed within the return air lane 026. The system for purifying dust-laden airflow in a tunneling tunnel includes the dust-laden airflow purification device, which has all the beneficial effects of the aforementioned purification device. It can remove dust from the airflow in tunneling tunnel 022 and neutralize and absorb acidic and alkaline toxic and harmful gases emanating from tunneling tunnel 022.

[0087] Specifically, in this embodiment, as shown in FIG6 , the exhaust section 014 enters the return air tunnel 026 through the connecting tunnel 024 , and an adjusting window 025 is also provided in the connecting tunnel 024 to adjust the air environment in the excavation tunnel 022 together with the purification system.

[0088] Specifically, in this embodiment, as shown in FIG6 , the purification system further includes an air pump 013 . The air pump 013 is disposed in the pipeline, and along the flow direction of the air flow, the air pump 013 is located downstream of the purification device.

[0089] More specifically, the air pump 013 can be a centrifugal vane pump, an axial vane pump, a mixed flow vane pump, a vortex vane pump, a plunger pump, a diaphragm pump, a gear pump, a screw pump, a rotary vane pump, a rotor pump, a water ring vacuum pump or a roots pump. The distance between the air inlet of the air inlet section 011 and the head 023 of the tunnel 022 is less than , where S is the cross-sectional area of ​​the heading tunnel 022. Generally, the distance between the air inlet of the air intake section 011 and the head 023 is less than 5m.

[0090] During operation, the vacuum pump 013 is activated, generating negative pressure in the air intake section 011 and positive pressure in the air exhaust section 012. Dust and acidic and alkaline toxic and harmful gases generated at the head 023 of the tunneling tunnel 022 are drawn into the air intake section 011, neutralized and dust-removed by the dust-laden airflow purification device 012, and then discharged from the tunneling tunnel 022 via the vacuum pump 013 and the air exhaust section 014. Due to the action of the tunneling tunnel dust-laden airflow purification system, negative pressure is generated at the head 023 of the tunneling tunnel 022, drawing fresh air from the air intake tunnel 021 into the tunneling tunnel 022. Workers in the tunneling tunnel 022 are always exposed to fresh air, effectively protecting the air environment in the tunneling tunnel 022 and the health of the workers.

[0091] Different from the traditional exhaust ventilation that uses local fans as power, the present invention uses an exhaust pump 013 as power. Since the current water ring vacuum pumps, Roots pumps and other exhaust pumps are professional equipment for extracting gas, they have excellent explosion-proof performance and can work even when the concentration of toxic and harmful gases such as gas is in the explosion range, so they are highly safe. Moreover, by setting up pipelines and dust-laden airflow purification devices, the exhaust pump 013 can be set in the fresh airflow of the excavation tunnel 022, thereby effectively avoiding the disadvantages of traditional exhaust ventilation that uses local fans for ventilation.

[0092] Finally, it should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0093] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to the embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is to be construed in the widest manner consistent with the principles and novel features disclosed herein.

Claims

1. A dust-laden airflow purification device, characterized in that: The purified water tank (100) is provided with an air inlet pipe (110) and an air outlet pipe (120), wherein the air outlet end of the air inlet pipe (110) is lower than a set minimum water level of the purified water tank (100), and the air inlet end of the air outlet pipe (120) is higher than a set maximum water level of the purified water tank (100); The bottom of the purified water tank (100) is also connected to a slag removal device (200), the slag removal device (200) comprising a slag removal tank (210) and a filter press piston (230) arranged in the slag removal tank (210), the filter press piston (230) being used for squeezing and filtering the mud slurry in the slag removal tank (210); the slag removal tank (210) is provided with a slag discharge pipe (240), and the slag discharge pipe (240) is provided with a self-opening and closing slag discharge valve (250), when the pressure of the mud slurry in the slag discharge pipe (240) is greater than the set pressure of the self-opening and closing slag discharge valve (250) under the action of the filter press piston (230), the self-opening and closing slag discharge valve (250) automatically opens the slag discharge port of the slag discharge pipe (240); otherwise, the self-opening and closing slag discharge valve (250) automatically blocks the slag discharge port.

2. The dust-laden airflow purification device according to claim 1, characterized in that: The self-opening and closing slag discharge valve (250) comprises a support seat (251) and a blocking member and an elastic member (254) arranged on the support seat (251); the blocking member is movably arranged on the support seat (251); the elastic member (254) is arranged between the support seat (251) and the blocking member, and enables the blocking member to block the slag discharge port at a set pressure.

3. The dust-laden airflow purification device according to claim 2, characterized in that: The sealing member comprises an L-shaped rod (252) and a plug (255) arranged at one end of the L-shaped rod (252), and the elastic member (254) is arranged at the other end of the L-shaped rod (252); the L-shaped rod (252) is rotatably arranged at the fulcrum of the support seat (251), the rotation axis of the L-shaped rod (252) is perpendicular to the axis of the slag discharge pipe (240), and the plug (255) and the elastic member (254) are respectively located on both sides of the fulcrum.

4. The dust-laden airflow purification device according to claim 1, characterized in that: The filter press piston (230) includes a piston rod (231), a piston disc, and a filter pad (235) arranged on the lower side of the piston disc. A mounting shaft (234) is vertically fixed to the bottom of the piston rod (231). The piston disc includes a first piston disc (232) and a second piston disc (233). Both are provided with water-permeable holes (2322), are hinged to the mounting shaft (234), and are respectively located on both sides of the mounting shaft (234). A limiting member (237) is also provided at the bottom of the piston rod (231). When the filter press piston (230) moves downward, the limiting member (237) prevents the first piston disc (232) and the second piston disc (233) from turning upward.

5. The dust-laden airflow purification device according to claim 4, characterized in that: A pulp inlet is provided on the side of the deslagging bin (210), the pulp inlet being in communication with the pulp outlet of the purified water bin (100); and when the filter press piston (230) is in a standby state, its position is higher than the pulp inlet.

6. The dust-laden airflow purification device according to claim 5, characterized in that: A slurry discharge pipe (260) is also provided at the bottom of the deslagging bin (210) for discharging the liquid or mud slurry in the purification device.

7. The dust-laden airflow purification device according to any one of claims 1 to 6, characterized in that: The purification device further comprises a circulating water tank (300), wherein the circulating water tank (300) is in communication with the purified water tank (100), and a filter element (161) is provided between the two, for preventing dust and sludge in the purified water tank (100) from entering the circulating water tank (300); The circulating water tank (300) is connected to a spray device; the spray device comprises a first spray head (341), the air inlet pipe (110) is arranged at an angle, the first spray head (341) is arranged on the air inlet pipe (110), and is used to spray water to the air flow flowing through the air inlet pipe (110); and / or the spray device comprises a second spray head (342), the air outlet pipe (120) is arranged at an angle, the second spray head (342) is arranged on the air outlet pipe (120), and is used to spray water to the air flow flowing through the air outlet pipe (120).

8. The dust-laden airflow purification device according to any one of claims 1 to 6, characterized in that: The purification device further comprises a neutralization silo (400), the purified water silo (100) and the neutralization silo (400) are connected via a first feeding pipe (410), and the first feeding pipe (410) is provided with a first feeding device (420) for adding the neutralization material in the neutralization silo (400) into the purified water silo (100) to neutralize the acidity / alkalinity of the gas entering the purified water silo (100).

9. The dust-laden airflow purification device according to claim 8, characterized in that: The purification device further comprises a flocculant bin (500), the purified water bin (100) and the flocculant bin (500) are connected via a second feeding pipe (510), and the second feeding pipe (510) is provided with a second feeding device (520) for adding the flocculant in the flocculant bin (500) into the purified water bin (100) to accelerate the precipitation of dust in the purified water bin (100).

10. The dust-laden airflow purification device according to claim 9, characterized in that: The purification device further comprises a stirring device, which is used to stir the water in the purified water tank (100) to accelerate the diffusion of the neutralizing material and the flocculant and the precipitation of the sludge.

11. The dust-laden airflow purification device according to any one of claims 1 to 6, characterized in that: A bypass pipe (130) is also connected between the air inlet pipe (110) and the air outlet pipe (120), and the bypass pipe (130) is provided with a bypass valve (131).

12. A dust-laden airflow purification system for tunneling tunnels, characterized in that: The invention comprises a dust-laden airflow purification device and a pipeline as described in any one of claims 1 to 11, wherein the purification device is arranged in the excavation tunnel (022), and the pipeline comprises an air intake section (011) and an exhaust section (014), one end of the air intake section (011) is arranged at the head (023) of the excavation tunnel (022), and the other end is connected to the air intake pipe (110) of the purification device; one end of the exhaust section (014) is connected to the air outlet pipe (120) of the purification device, and the other end is arranged in the return air tunnel (026).

13. The dust-laden airflow purification system for tunneling tunnels according to claim 12, characterized in that: The purification system further comprises an air extraction pump (013), wherein the air extraction pump (013) is arranged in the pipeline and is located downstream of the purification device along the flow direction of the air flow.

14. The dust-laden airflow purification system for tunneling tunnels according to claim 13, characterized in that: The vacuum pump (013) includes a centrifugal vane pump, an axial flow vane pump, a mixed flow vane pump, a vortex vane pump, a plunger pump, a diaphragm pump, a gear pump, a screw pump, a rotary vane pump, a rotor pump, a water ring vacuum pump or a Roots pump.

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