CN107900023B - DPF cleaning device based on gas explosion - Google Patents
DPF cleaning device based on gas explosion Download PDFInfo
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- CN107900023B CN107900023B CN201711071428.5A CN201711071428A CN107900023B CN 107900023 B CN107900023 B CN 107900023B CN 201711071428 A CN201711071428 A CN 201711071428A CN 107900023 B CN107900023 B CN 107900023B
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- dpf
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0237—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles for regenerating ex situ
Abstract
The utility model provides a DPF cleaning device based on gas explosion, includes container, gas explosion quick-opening valve and the dust removal muffler of establishing ties in proper order, the container is used for being connected with high-pressure air source, the dust removal muffler includes lid, outer sack and inlayer sack, the lid is sealed outer sack opening forms the cavity, inlayer sack is located in the cavity, this lid set up with this inlayer sack opening sealing connection's gas outlet, this cavity is used for being connected with the gas explosion quick-opening valve.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a DPF cleaning device based on gas explosion.
Background
The DPF Diesel Particulate Filter diesel particulate filter is a device for reducing Particulate Matters (PM) in exhaust gas by filtration, abbreviated as DPF, mounted in an exhaust system of a diesel vehicle. The DPF can effectively purify 70% -90% of particles in exhaust gas, and is one of the most effective and direct methods for purifying diesel particulate matters. Commercialization has been achieved internationally. The DPF is arranged on an exhaust pipe of the diesel engine, and PM is adsorbed and filtered by the filter element when the exhaust passes through. However, as the operating time increases, PM in the filter element increases, resulting in an increase in exhaust back pressure, which affects the economy of the power performance of the diesel engine. The removal of PM on the filter cartridge is referred to as regeneration of the DPF. The biggest challenge faced by DPFs is the problem of regeneration.
Referring to fig. 1, publication number CN1920267B discloses a DPF diesel particulate filter 40 that is a monolithic particulate trap and includes alternating closed cells/channels 50 and closed cells/channels 52. Exhaust gases, such as those produced by an engine, enter the closed-end passage 50 for accumulation of particulate matter 54 and flow out of the open passage 52. The plugs 56 are used to seal the ends of the channels 50, 52. The walls 58 of the diesel particulate filter 40 are preferably composed of porous ceramic honeycomb walls of band-like material. The soot particles 59 flow into the diesel particle filter and are trapped there. The DPF with the structure is provided with innumerable tiny pore canals, the tiny pore canals are blocked by PM along with the use of the DPF, part of PM can be oxidized and burnt by engine exhaust during the running of a vehicle, the DPF is more and more difficult to regenerate along with the increase of the working time of the DPF, the DPF is blocked seriously, the exhaust cannot be discharged, and a device capable of cleaning the DPF and dredging the tiny pore canals in the DPF is needed.
Disclosure of Invention
The invention aims to provide a DPF cleaning device based on gas explosion, which can capture PM generated by the gas explosion of a DPF.
In order to achieve the advantages, the DPF cleaning device based on gas explosion comprises a container, a gas explosion quick-opening valve and a dust removing silencer which are sequentially connected in series, wherein the container is used for being connected with a high-pressure gas source, the dust removing silencer comprises a cover body, an outer layer cloth bag and an inner layer cloth bag, the cover body seals an opening of the outer layer cloth bag to form a cavity, the inner layer cloth bag is positioned in the cavity, the cover body is provided with a gas outlet which is in sealing connection with the opening of the inner layer cloth bag, and the cavity is used for being connected with the gas explosion quick-opening valve.
The DPF cleaning device based on the gas explosion comprises a container, a gas explosion quick-opening valve and a dust removing silencer which are sequentially connected in series, so that PM generated by the gas explosion of the DPF can be captured by a very large area while the size of a cavity required by the gas explosion is ensured, and noise generated by a part of the gas explosion can be eliminated.
Drawings
Fig. 1 is a schematic diagram showing the structure of a conventional DPF.
Fig. 2 is a schematic structural view of a DPF cleaning device according to a first embodiment of the present invention.
Fig. 3 is a schematic view showing a structure of the DPF cleaning device of fig. 2 in a second direction.
Fig. 4 is a schematic view showing a third direction of the DPF cleaning apparatus of fig. 2.
Fig. 5 is an exploded view of the DPF cleaning device of fig. 2.
FIG. 6 is a cross-sectional view of the DPF cleaning device of FIG. 2.
Fig. 7 shows a partial enlarged view at a of fig. 3.
Fig. 8 is a partial enlarged view at B of fig. 4.
Fig. 9 is a partial enlarged view of C in fig. 6.
FIG. 10 is a schematic view of the DPF mounting block of the DPF cleaning device of FIG. 2.
FIG. 11 is an exploded view of the DPF mounting bracket of FIG. 10.
Fig. 12 is a partial enlarged view of D in fig. 6.
Fig. 13 is a schematic view showing the structure of an ultrasonic generator of the DPF cleaning device of fig. 5.
Fig. 14 is an exploded view of the ultrasonic generator of fig. 13.
Fig. 15 is a cross-sectional view of the ultrasonic generator of fig. 13.
Fig. 16 is a schematic view showing the structure of a quick-opening valve for gas explosion of the DPF cleaning device of fig. 2.
Fig. 17 is an exploded view of the quick gas explosion valve of fig. 13.
Fig. 18 is a cross-sectional view of the quick-release valve of fig. 13.
Fig. 19 is a partial enlarged view of fig. 18 at E.
Fig. 20 is a schematic view showing the structure of a dust removing muffler of the DPF cleaning device of fig. 2.
Fig. 21 is an exploded view of the dust removing muffler of fig. 13.
Fig. 22 is a cross-sectional view of the dust removing silencer of fig. 13.
Fig. 23 is a diagram showing the connection relation of the DPF cleaning device of fig. 2.
Fig. 24 is a schematic structural view of a DPF cleaning device based on gas explosion according to a second embodiment of the present invention.
Fig. 25 is a schematic structural view showing a DPF cleaning device based on ultrasonic cleaning according to a third embodiment of the present invention.
Fig. 26 is a schematic view showing the structure of a DPF mounting frame in a fourth embodiment of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted for achieving the preset aim of the invention, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the invention with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 2 to 5, a DPF cleaning apparatus according to a first embodiment of the present invention is for cleaning a DPF100, and includes a container 1, a DPF mounting frame 2, an ultrasonic generator 3, a filter 4, a pump 5, a cleaning liquid source 6, a gas explosion quick-opening valve 7 and a dust removing silencer 8, wherein the DPF mounting frame 2 and the ultrasonic generator 3 are accommodated in the container 1, and the container 1, the gas explosion quick-opening valve 7 and the dust removing silencer 8 are sequentially connected in series; the container 1, the filter 4, the cleaning liquid source 6, the pump 5 and the container 1 are connected in series in this order, and a liquid outlet of the pump 5 is connected to a liquid outlet of the filter 4.
Referring to fig. 6, a specific container 1 is located above the cleaning solution source 6, but not limited thereto. The container 1 preferably has a cylindrical structure. The vessel 1 is divided by a DPF into a first chamber 1a and a second chamber 1b. The opening of the container 1 is provided with a lid 11 for sealing the container 1, and a lid locker 12 and a lid opener 13, wherein the lid 11 is hinged with the container 1. A cover 11 is located at one end of the first chamber 1a.
Referring to fig. 7, the lid locker 12 includes a first bracket 121, a second bracket 122, a lid locking telescopic mechanism 123, two ends of the lid locking telescopic mechanism 123 are respectively hinged to ends of the first bracket 121 and the second bracket 122, middle portions of the first bracket 121 and the second bracket 122 are respectively hinged to the container 1, and locking buckles 120 for limiting opening of the lid 11 are respectively fixed to ends of the first bracket 121 and the second bracket 122, which are opposite to the lid locking telescopic mechanism 123. A first position sensor for detecting whether the latch engages the lid 11 is provided near the further latch 120, and a second position sensor for detecting whether the latch is completely separated from the lid 11 is provided near the latch 120.
When the lid retracting mechanism 123 is fully extended, the first and second brackets 121,122 are rotated to bring the lock catch 120 against the lid 11 or the container 1, while the lock catch 120 restricts the opening of the lid 11. When the locking cap retracting mechanism 123 is fully retracted, the first and second brackets 121,122 release the restriction of the cap 11 by the lock catch 120 by rotation.
The lock catch 120 is in a U-shaped cross section and is in a rod-shaped structure, and a convex edge 14 matched with the lock catch 120 is fixed on the peripheral surface of the container 1 close to the edge of the cover 11. The first and second brackets 121,122 are respectively fixed with a stopper 1201, and when the lock catch 120 releases the restriction of the lid 11, the stopper 1201 abuts against the container 1 to restrict the rotation of the first and second brackets 121,122 corresponding to the stopper 1201.
Referring to fig. 8, the cap opener 13 includes a lever 131 and a cap opening and closing mechanism 132 which are fixedly connected to the cap 11, the other end of the lever 131 is hinged to the cap opening and closing mechanism 132, and the other end of the cap opening and closing mechanism 132 is hinged to the container 1. The cover opening and closing mechanism 132 and the cover locking and closing mechanism 123 may be pneumatic cylinders, hydraulic cylinders, or electric cylinders. The lid opening and closing mechanism 132 and the lid locking and closing mechanism 123 are electrically connected to a controller (not shown). An infrared sensor (not shown) for detecting whether a person is present in the vicinity of the opening of the container 1 is provided outside the cover 11 or the container 1, and the infrared sensor is electrically connected to the controller. The controller is also electrically connected with the alarm device. A third position sensor for detecting whether the lid 11 covers the container 1 is provided near the lid 11, and a fourth position sensor for detecting that the lid 11 is opened in place is provided near the lid 11.
When the infrared sensor detects that a person is near the opening of the container, the cover is possibly damaged by opening the cover, so that the controller can not send unlocking or cover opening signals to the cover locking telescopic mechanism 123 and the cover opening telescopic mechanism 132 even if receiving a cover opening command, and simultaneously, the controller sends a signal to the alarm device to make the alarm device send sound and/or light to remind the person to leave the vicinity of the cover, and when no person is near the cover, the controller firstly controls the cover locking telescopic mechanism 123 to unlock and then controls the cover opening telescopic mechanism 132 to open the cover. The further controller can be with the liquid level sensor, air pressure sensor, the hydraulic pressure sensor in the container, when the controller detects that there is water or the gas higher than atmospheric pressure in the container, the controller can not send unblock or uncap signal to locking cap telescopic machanism 123, uncap telescopic machanism 132 even receive uncap command, and the controller judges whether the hasp is separated from the lid simultaneously, if yes, control uncap telescopic machanism 132 uncap, otherwise send signal alarm to alarm device. After the controller controls the cover opening and retracting mechanism 132 to open the cover, the controller judges whether the cover 11 is opened in place, otherwise, the controller gives an alarm.
After the controller opens the cover and the telescopic mechanism 132 closes the cover, the controller firstly judges whether the cover 11 covers the container 1, if yes, a cover locking signal is sent to the cover locking telescopic mechanism 123, otherwise, an alarm is given. After the locking cover telescopic mechanism 123 sends out a locking cover signal, the controller judges whether the lock catch is engaged with the cover 11, otherwise, the controller gives an alarm.
Referring to fig. 9, the end surface of the container 1 facing the lid 11 is provided with an annular groove 15 corresponding to the edge of the lid 11, and the annular groove 15 accommodates a sealing ring 16; a gas passage 160 which can be connected with a high-pressure gas source is formed between the sealing ring 16 and the bottom of the annular groove 15; when the gas passage 160 accommodates high-pressure gas for pressing the seal ring 16, the seal ring 16 seals the lid 11 and the end face of the container 1. A seal control valve 161, a gas reservoir 162 and a check valve 163 are preferably provided between the gas passage 160 and the high pressure gas source. An air pressure sensor is provided in the air tank 162. The seal control valve 161 and the air pressure sensor are electrically connected to the controller. The purpose of the air storage tank 162 is that the high-pressure air source firstly fills high-pressure air into the air storage tank through the one-way valve, the high-pressure air in the air channel can squeeze the sealing ring to the cover to seal the container and the cover, and then the high-pressure air source fills the high-pressure air into the container.
The controller is used for controlling the sealing control valve 161 to open to inject high-pressure air into the air channel 160 when the air pressure in the air storage tank 162 is larger than a set value, so that the sealing ring 16 moves towards the cover 11 to hermetically connect the cover 11 and the container 1. One end of the sealing ring 16, which is close to the cover 11, is provided with a pair of first sealing ribs 161 which are arranged in a V shape and extend back to the center of the sealing ring 16, the first sealing ribs 161 are used for being unfolded back to the center of the sealing ring 161 when the sealing ring presses the cover 11, the sealing area of the container and the cover is increased, meanwhile, the first sealing ribs 161, which are close to the inner side of the container, are not easy to be pressed and deformed by high-pressure air in the container 1 due to the mutual pressing force of the cover 11 and the container 1, and form stable sealing end surfaces. The end of the sealing ring 16 facing away from the cover 11 is provided with a pair of second sealing ribs 162 which are arranged in a V shape and extend towards the side wall of the groove, the second sealing ribs 162 are used for pressing the side wall of the annular groove 15 when high-pressure gas is contained in the gas channel 160, the side wall of the annular groove is further connected in a sealing mode, the peripheral face of the container 1, close to the edge of the cover 11, is fixedly provided with an annular protruding rib 14, the annular groove 15 is located on the protruding rib 14, and one face of the protruding rib 14 facing away from the cover 11 is provided with an air inlet hole communicated with the gas channel 160. When the cover 11 covers the container 1, a gap is formed between the container 1 and the cover 11, and the cover is more easily parallel to the sealing ring and the annular groove, so that the sealing ring 16 can be sufficiently deformed when high-pressure gas is arranged in the gas channel 160, and the first sealing ridge and the second sealing ridge uniformly press the cover or the annular groove under the pressure of the gas. The seal ring 16 is made of rubber. The width of the side wall of the annular groove, which is close to the bottom of the annular groove, gradually decreases towards the middle part of the annular groove.
Preferably, the container 1 further comprises an air pressure sensor for sensing the air pressure in the first chamber 1a and/or in the second chamber 1b.
Referring to fig. 10 and 11, the dpf mounting frame 2 includes a locking mechanism 21 and a mounting frame base plate 22. The locking mechanism 21 includes a connecting rod 211 fixedly connected with the mounting bracket base plate 22, a reaction beam 212, a pressing rod 213, a contact plate 214, and a seal adjusting plate 215 positioned between the DPF and the mounting bracket base plate 22. The mounting base plate 22 includes a plate body 221 and an annular frame 222, and the plate body 221 has a through hole communicating with the duct of the DPF.
The reaction beam 212 is fixedly connected with the connecting rod 211, the reaction beam 212 is in threaded connection with the pressing rod 213, and the pressing rod 213 is used for pressing the DPF through the pressing contact plate 214 to be connected with the mounting frame bottom plate 22 in a sealing manner. The number of the connection rods 211 is one, and the pair of connection rods 211 are symmetrically disposed around the DPF. The connecting rod 211 is of a cylindrical structure, the counter-force beam 212 is provided with a through hole for accommodating the connecting rod 211, and the counter-force beam 212 can slide along the length direction of the connecting rod 211. The reaction beam 212 is connected with an engagement portion 2120, the engagement portion 2120 and the mating connection portion 2110 are detachably connected and fixed, and the connecting rod 211 is provided with a plurality of mating connection portions 2110 along the longitudinal direction. The mating connection portion 2110 is an annular groove formed around the outer peripheral surface of the connection rod 211, in this embodiment, the engagement portion 2120 is a screw rod that can be accommodated in the annular groove, the screw rod is in threaded connection with the reaction beam 212, and the locking mechanism 21 can press the DPF casing 101, the seal adjusting plate 215, and the annular frame 222 of the mounting base plate 22 to be fixedly connected in a sealing manner.
One function of the seal adjusting plate 215 is to sealingly connect the outer wall of the DPF or the DPF casing with the bottom plate 22, and the other is that the seal adjusting plate 215 is easily replaced since it is not fixedly connected with the bottom plate 22, and when the size of the DPF is changed, the seal adjusting plate 215 can be easily replaced to accommodate the DPF.
Referring to fig. 12, the annular frame 222 is sealingly connected and fixed to the inner wall of the container 1, and the locking mechanism 21 is connected and fixed to the mounting base 22, although the locking mechanism 21 may also be connected and fixed to the container 1. The locking mechanism 21 is used for extruding DPF and is fixedly connected with the sealing of the mounting bracket bottom plate 22, the locking mechanism 21 is fixedly connected with the mounting bracket bottom plate 22, the inner wall of the container 1 is fixedly provided with a sealing ring 220 matched with the mounting bracket bottom plate 22, the mounting bracket bottom plate 22 is accommodated in a through hole of the sealing ring 220 and is fixedly connected with the sealing ring 220 in a sealing way, and the through hole of the sealing ring 220 is gradually reduced from one end close to the DPF to the other end. The reaction beam 212 is fixedly connected with a support leg 2121; the legs 2121 are adapted to contact the inner wall of the vessel 1 when the DPF mounting frame 2 is accommodated in the vessel 1 to maintain the position of the mounting base 22 and the gasket 220.
Referring to fig. 13, 14, 15, the ultrasonic generator 3 includes a vibrator mounting box 31 and a plurality of ultrasonic vibrators 32 (ultrasonic vibrators) fixed in the vibrator mounting box 31, the ultrasonic vibrators 32 being accommodated in the vibrator mounting box 31. The vibration head mounting box 31 comprises a mounting box bottom plate 311, a mounting box top plate 312 positioned on one side of the ultrasonic vibration head 32 back to the mounting box bottom plate 311, and a mounting box connecting wall 313 connecting the mounting box bottom plate 311 and the mounting box top plate 312, wherein the mounting box bottom plate 311, the mounting box top plate 312 and the mounting box connecting wall 313 are made of stainless steel plates. The mounting box top plate 312 is fixed with a connection terminal 314 for leading out a power line of the ultrasonic vibration head 32, and the connection terminal 314 passes through the mounting box top plate 312. The mounting box top plate 312 is provided with oil filling holes and exhaust holes, and the oil filling holes and the exhaust holes are blocked by an oil filling plug 315 and an exhaust plug 316. The oil filling hole and the exhaust hole can also be arranged on the bottom plate or the connecting wall of the installation box. The ultrasonic vibration head 32 is fixed to the mounting box bottom plate 311 of the vibration head mounting box 31 by a sound guiding adhesive.
The vibration head mounting box 31 is provided with an adjustment port 30 sealed by a pressure balance plate 33 having elasticity. The pressure balance plate 33 is made of rubber. The adjusting port 30 is formed on the top plate 312 of the mounting box, the pressure balance plate 33 is used for balancing the pressure inside and outside the vibration head mounting box 31, preventing the deformation of the bottom plate 311 of the mounting box when the gas pressure or the liquid pressure exists in the container, and protecting the connection between the ultrasonic vibration head 32 and the bottom plate 311 of the mounting box (the sound guiding glue is a relatively brittle material, and if the bottom plate 311 of the mounting box deforms, the ultrasonic vibration head has great loss). The outside of the pressure balance plate 33 is in pressure communication with the second chamber, and the vibration head mounting box 31 is filled with an incompressible fluid, preferably an insulating fluid, and more preferably silicone oil. A flow in which the density change of the fluid during the flow is negligible is called incompressible flow. The adjustment port 30 may also be formed in the mounting box base 311 or the mounting box connecting wall 313 in other embodiments of the invention.
The ultrasonic generator 3 can utilize cavitation, acceleration and direct flow of ultrasonic wave in the cleaning liquid to directly and indirectly act on the cleaning liquid and PM, so that PM in the DPF pore canal is dispersed, emulsified and stripped to dredge the DPF pore canal.
Cavitation, when strong ultrasonic waves are radiated into a liquid, the cleaning liquid changes around the static pressure (one standard air pressure), and when the pressure is lower than zero, oxygen dissolved in the liquid forms a fine bubble nucleus, and numerous fine voids (cavitation) similar to vacuum are generated. The micro-cavities in the ultrasonic positive pressure are crushed in an adiabatic compression state, and the powerful shock waves generated at the crushing moment can directly destroy pollutants and disperse the pollutants in the liquid to form a cleaning mechanism. This powerful cleaning action in the test can erode the aluminum foil into numerous pinholes in tens of seconds. The cavitation effect makes the liquid generate high temperature and high pressure (1000 air pressure, 5500 ℃) locally, and then the stirring generated by vibration promotes the multiplication of chemical or physical effects, and the liquid is continuously emulsified and dispersed, thereby further promoting the rate of chemical reaction.
The acceleration effect, the cleaning liquid is radiated by ultrasonic wave, the liquid molecules vibrate, the vibration acceleration is tens times to hundreds times of the gravity acceleration, and the surface subjected to PM can be peeled and cleaned by the powerful acceleration.
The phenomenon in which ultrasonic waves flow in the liquid in the propagation direction of sound due to the action of the direct flow is called direct flow. The direct flow stirs the micro oil dirt on the surface of the cleaned object, the cleaning liquid on the dirt surface also generates convection, and the dissolving liquid for dissolving PM is mixed with the new liquid, so that the dissolving speed is increased, and the method plays a great role in carrying PM.
The filter 4 is preferably a membrane filter whose core element is a filter membrane, which is a membrane prepared on a microporous support layer (support) and filled with finer pores. There are many materials for fabricating the filter membrane, and they are classified into organic membranes (e.g., polysulfone hollow fiber membranes) and inorganic membranes. The filter membrane as the filter element has the structural characteristics of very thin filter layer, so that the filter mechanism mainly has the screening function and the adsorption effect is very small. The membrane filter has higher filtering precision, more stable grain diameter control and easy recovery performance of back flushing. For a typical solid suspension, PM larger than the membrane pores is trapped (screened out) on the surface of the membrane, and because the membrane is thin as a filter layer, adsorption of these PM cannot be produced, and although the support layer is relatively thick, its pores are large relative to the membrane pores, which is insufficient for adsorption. Thus, only screening effect is achieved, so that the back washing and cleaning are easy. Of course, the filter 4 may be a filter other than a membrane filter.
The pump 5 is used to inject cleaning fluid into the container.
The cleaning liquid source 6 is a water tank which can hold cleaning liquid. The cleaning solution source 6 is communicated with an upwardly extending vent pipe 61 (see fig. 3), so that when the cleaning solution source 6 is replenished or discharged from the cleaning solution source 6, the vent pipe 61 can communicate the inside and outside of the cleaning solution source 6 to prevent the cleaning solution source 6 from deforming or vibrating.
Referring to fig. 16-18, the gas explosion quick-opening valve 7 specifically includes a valve seat 71 and a valve flap 72, wherein the valve flap 72 includes a first piston 721, a second piston 722, and a connecting column 723 for connecting and fixing the first piston 721 and the second piston 722; the valve seat 71 includes a first valve chamber 71a accommodating a first piston 721, a second valve chamber 71b accommodating a second piston 722, and a partition 711 separating the first valve chamber 71a and the second valve chamber 71b, the first valve chamber 71a having an exhaust port 712a and an intake port 711a matably sealable with the first piston 721, a connection post 723 passing through the partition 711, the connection post 723 and the partition 711 sealing each other, the second piston 722 separating the second valve chamber 71b into open valve chambers 711b and Guan Faqiang 712b, the open valve chamber 711b being located between the close valve chamber 712b and the first valve chamber 71a, the open valve chamber 711b having open valve ports 7110, guan Faqiang 712b having close valve ports 7120. The air inlet 711a is for communication with the container 1 containing high-pressure air. The exhaust port 712a is adapted to communicate with the atmosphere. Guan Fakou 7120 is connected with high-pressure air, and the opening 7110 is connected with the atmospheric explosion quick-opening valve 7 to be closed, otherwise, the air explosion quick-opening valve 7 is instantly opened under the extrusion of the air inlet 711a.
The opening valve port 7110 is located at an end of the opening valve chamber 711b near the partition 711, and the Guan Fakou 7120 is located at an end of the closing valve chamber 712b away from the partition 711. The open port 7110 is for communication through the valve to the high pressure air source, atmosphere, respectively, and Guan Fakou 7120 is for communication through the valve to the high pressure air source, atmosphere, respectively. The air inlet 711a is provided with an annular seal 73. The surface of the first piston 721 contacting the sealing portion 73 is a spherical surface or an inclined surface, and the first piston 721 and the sealing portion 73 cooperate to block the air inlet 711a.
Referring to fig. 19, the first piston 721 is in surface contact or line contact with the sealing portion 73 to block the air inlet 711a. The first piston 721 has a tapered frustum-shaped structure in which the cross section of the first piston 721 is gradually reduced away from the second piston 722, and the end of the sealing portion 73 close to the second piston 722 is an opening of a tapered frustum-shaped cavity in which the cross section of the sealing portion 73 is gradually enlarged, and when the opening is in line contact with the first piston 721 near the edge of one side of the second piston 722, a gap is formed between the other side and the second piston 722, so that the sealing portion 73 can be sufficiently deformed to be in contact with the first piston 721 even if the first piston 721 and the sealing portion 73 are not absolutely parallel (limited by processing accuracy), thereby realizing a good sealing effect.
The area of the second piston 722 is further larger than the inner diameter of the sealing part 73, so that the pressure of the gas applied to the second piston can be larger than the pressure applied to the first piston under the condition that the valve closing cavity is the same as the pressure in the container, and the sealing effect is better.
The quick-opening valve for the gas explosion has the advantages that the pressure in the container is instantly reduced to the atmospheric pressure after the gas with the set pressure is filled in the container, the gas in the PM gaps of the DPF pore canal is suddenly expanded to generate the gas explosion, so that the PM in the DPF pore canal is broken and peeled off, meanwhile, the pressure in the second cavity can be instantly reduced due to the sealed connection of the outer wall of the DPF and the container, high-speed air in the first cavity can form high-speed air flow in the DPF pore canal, the high-speed air flow can carry out PM in the DPF pore canal, meanwhile, the PM carried by the high-speed air flow collides, extrudes and rubs the PM remained in the DPF pore canal, and the PM is further broken or peeled off. PM stripped by the gas explosion is intercepted and captured by the dust removing silencer 8 when passing through the dust removing silencer 8.
Referring to fig. 20-21, the dust removing silencer 8 includes a cover 81, an outer cloth bag 82, an inner cloth bag 83, a cloth bag connecting wall 84 between the cover 81 and the outer cloth bag 82, and a support sleeve 85 detachably connected with the cloth bag connecting wall, wherein the cover 81 seals an opening of the outer cloth bag 82 to form a cavity 80, the inner cloth bag 83 is located in the cavity 80, and the outer cloth bag 82 is detachably connected with the cloth bag connecting wall 84 in a sealing manner. The cover 81 is provided with a gas outlet 811 which is in sealing connection with the opening of the inner cloth bag 83, and the cavity 80 is used for being connected with the gas explosion quick-opening valve 7. The air in the cavity 80 is communicated with the atmosphere through the outer cloth bag 82 and the inner cloth bag 83. The cloth bag connecting wall 84 is provided with a gas inlet 841 connected with the gas explosion quick-opening valve 7. The outer layer cloth bag 82 and the inner layer cloth bag 83 respectively accommodate an outer layer support cage 821 and an inner layer support cage 831, and the outer layer support cage 821 and the inner layer support cage 831 are respectively used for preventing the outer layer cloth bag 82 and the inner layer cloth bag 83 from deforming and ensuring the volume of the cavity 80. The cover 81 is fixed with a connection pipe penetrating through the cover 81 as a gas outlet 811, the connection pipe being connected and fixed with the inner cloth bag 83. The inner cloth bag 83 and the outer cloth bag 82 are cylindrical bag-like structures. The outer cloth bag 82 and the inner cloth bag 83 are made of waterproof and breathable fabrics. The gas of gas explosion can absorb the noise of gas explosion when passing through the dust removing silencer, thereby achieving the technical effect of silencing.
The support sleeve 85 is provided with a plurality of through holes. The inner and outer cloth bags 83, 82 serve to prevent the release of water and PM into the atmosphere.
Referring to fig. 23, the specific connection relation of the cleaning liquid portion of the dpf cleaning device is: the first chamber 1a, the second chamber 1b are respectively connected through feed liquor valve FA1, feed liquor valve FA2 and pump 5, washing liquid source inlet valve FE, washing liquid source 6, and first chamber 1a, second chamber 1b are respectively connected through flowing back valve FB1, flowing back valve FB2 and filter 4 and washing liquid source 6, and the liquid outlet of pump 5 is connected with the liquid outlet of filter 4 through backwash valve FC, and the liquid inlet of filter 4 is connected with the waste liquid drain pipe that has waste liquor valve FD.
Under normal operation, the cleaning liquid source inlet valve FE is opened, the waste liquid valve FD and the back flushing valve FC are closed, and the filter 4 is used to intercept or capture PM from the vessel 1. DPF is cleaned by opening and closing the inlet valve FA1, the inlet valve FA2, the drain valve FB1, the drain valve FB2, the pump 5 and the ultrasonic generator 3 in various ways.
When the filter screen or the filtering membrane in the filter 4 is seriously blocked, the waste liquid valve FD and the back flushing valve FC can be opened, the cleaning liquid source inlet valve FE, the liquid discharging valve FB1 and the liquid discharging valve FB2 can be closed, and the back flushing of the filter 4 is carried out to dredge the filtering membrane in the filter 4.
The first chamber 1a and/or the second chamber 1b is preferably connected with an upwardly extending container vent pipe via a vent valve to ensure that cleaning liquid can be injected into the container. The gas explosion quick-opening valve can be used as an exhaust valve.
Preferably, a liquid level sensor is provided in the first chamber 1a and/or the second chamber 1b and/or the cleaning liquid source 6, so that the level of the cleaning liquid in the first chamber 1a and/or the second chamber 1b and/or the cleaning liquid source 6 can be known.
It should be noted that the cleaning liquid source inlet valve FE need not be provided, and that the absence of the cleaning liquid source inlet valve FE only results in a loss of cleaning liquid pressure into the filter 6.
In one embodiment of the invention, only the second chamber 1b is connected directly to the filter 4 via the drain valve FB2 or only the first chamber 1a is connected directly to the filter 4 via the drain valve FB 1.
In one embodiment of the invention, only the first chamber 1a is connected directly to the pump via the inlet valve FA1 or only the second chamber 1b is connected directly to the pump via the inlet valve FB 2.
The specific connection relation of the DPF cleaning device with respect to the gas part is: the container 1, the gas explosion quick-opening valve 7, the dust removing silencer 8 and the atmosphere are connected in series in sequence. The container 1 is also used for connection with a high pressure gas source, which may be a steam boiler, an air compressor or a compressed air storage tank, the high pressure gas being air, steam or a mixture of steam and air.
An inlet valve is provided between the first chamber 1a and/or the second chamber 1b and the high pressure gas source. The container 1, the quick-opening valve 7 for gas explosion and the pipe connected with the container can be provided with a sound-damping material layer or a sound-absorbing material layer.
In one embodiment of the invention, the gas explosion quick-opening valve 7 is connected to the atmosphere through a dust remover. The quick-opening valve 7 is connected with the atmosphere through a silencer.
Referring to fig. 24, in the DPF cleaning device based on the air explosion according to the second embodiment of the present invention, no ultrasonic generator, filter and pump are provided, a lock catch 120 'is hinged and fixed to the outside of the container 1, a torsion spring for keeping the lock catch close to the opening of the container 1 is provided between the lock catch 120' and the container 1, the upper surface of the lock catch is an inclined surface, a sealing structure is provided between the lid 11 and the container, a sealing structure is also provided between the outer walls of the two ends of the DPF and the container 1, the container 1 is arranged in a vertical direction, and the air explosion quick-opening valve 7 is communicated with the atmosphere through a dust remover.
Referring to fig. 25, in the DPF cleaning apparatus based on ultrasonic cleaning according to the third embodiment of the present invention, a gas explosion quick-opening valve and a dust removing muffler are not provided, and the pump includes a container 1 and a cover 11, wherein the cover 11 is located at the middle of the container 1. The container 1 is provided with the cover 11 in the horizontal direction and hinged with the container 1, a lock catch 120 'is fixedly hinged outside the container 1, a torsion spring for keeping the lock catch close to the opening of the container 1 is arranged between the lock catch 120' and the container 1, the upper surface of the lock catch is an inclined surface, a sealing structure is arranged between the cover 11 and the container, a sealing structure is also arranged between the outer walls of two ends of the DPF and the container 1, the DPF can be provided with no outer shell, the cleaning liquid source 6 can be tap water with pressure, and of course, the cleaning liquid source can also be river water. The filter 4 is selected from an activated carbon filter, the washing liquid filtered by the filter 4 can be discharged into a sewage pipeline, and the washing liquid filtered by the filter 4 can be discharged into a rainwater pipeline or a river or lake when the washing liquid is completely pollution-free.
Referring to fig. 26, in other embodiments, the engaging portion 2120 is an arc-shaped buckle that can be partially accommodated in the annular groove, and the engaging portion 2120 and the reaction beam.
The DPF cleaning method based on ultrasonic cleaning of the first embodiment of the invention comprises the following steps:
a1, placing the DPF in a sealed container, wherein the outer wall of the DPF is connected with the inner wall of the container in a sealing way, and the container is divided into a first chamber and a second chamber by the DPF;
a2, injecting the cleaning solution into the container until the cleaning solution in the first chamber or the second chamber reaches a set liquid level or a set hydraulic pressure, wherein the cleaning solution is injected into the container, and the cleaning solution can be injected into the first chamber or the cleaning solution is injected into the first chamber and the second chamber at the same time;
a3, turning on an ultrasonic generator to clean the DPF;
a4, closing the ultrasonic generator to discharge the cleaning liquid in the first cavity and the second cavity, wherein the specific discharge of the cleaning liquid in the first cavity and the second cavity can be the discharge of the cleaning liquid in the second cavity first, and then the discharge of the cleaning liquid in the first cavity or the discharge of the cleaning liquid in the first cavity and the second cavity simultaneously;
a5, opening the container, and taking out the cleaned DPF.
Preferably, the method further comprises the following steps after the step A3 and before the step A4: a31, keeping the ultrasonic generator 3 on, continuously discharging the cleaning liquid in the second chamber 1b, and continuously injecting the cleaning liquid into the first chamber.
The preferred step a31 includes the step of filtering the purging liquid discharged from the second chamber and injecting the filtered purging liquid into the first chamber 1a.
The preferred step A4 further comprises the following steps: the steps A2, A3, A4 are repeated several times.
In this embodiment, when the ultrasonic generator 3 is turned on, the cleaning solution in the second chamber 1b is continuously discharged, and simultaneously, the cleaning solution is continuously injected into the first chamber 1a, the cleaning solution in the DPF pore canal flows to the second chamber and then is discharged, and the process that the cleaning solution flows to the second chamber forms water flow to carry PM suspended in the DPF pore canal out on one hand, and the cleaning solution is supplied to the DPF pore canal to form a better cleaning effect.
The DPF cleaning method based on the gas explosion in the second embodiment of the invention comprises the following steps:
b1, placing the DPF in a sealed container 1, wherein the outer wall of the DPF is connected with the inner wall of the container 1 in a sealing way, and the container 1 is divided into a first chamber 1a and a second chamber 1B by the DPF;
b2, injecting high-pressure air into the container until the air pressure in the first chamber and the second chamber reaches a set air pressure value;
b3, rapidly opening the second chamber to enable PM attached in the DPF to be subjected to gas explosion and separated from the DPF, and discharging PM mixed gas generated after preferential gas explosion into the atmosphere after dust removal treatment, wherein the gas explosion process is subjected to silencing treatment;
and B4, opening the container, and taking out the DPF.
The preferred steps B3 and B4 further comprise: repeating steps B2, B3 several times.
The injection of the high-pressure gas into the container may be simultaneous injection of the high-pressure gas into the first and second chambers; the high-pressure gas is preferably injected into the container 1, so that when the DPF is seriously blocked, PM in the DPF pore canal of the airflow carrying part can be formed in the process that the high-pressure gas of the first chamber flows to the second chamber, more preferably, the high-pressure gas is firstly injected into the first chamber 1a, then the high-pressure gas is injected into the second chamber, PM in the DPF pore canal of the airflow carrying part can be formed in the process that the high-pressure gas of the first chamber flows to the second chamber, when the pressure difference between the first chamber and the second chamber is relatively large, the effect is good, and when the pressure of the first chamber and the pressure of the second chamber is relatively small, the pressure rising speed of the second chamber is slow, and the time can be shortened when the high-pressure gas is injected into the second chamber, and meanwhile, the pressure of the second chamber is ensured.
In the embodiment, PM mixed gas generated in the process of gas explosion after the silencing treatment and the gas explosion is discharged into the atmosphere after the dust removal treatment, and the method has the advantages of small sound and no pollution.
The DPF cleaning method of the third embodiment of the invention comprises the following steps:
c1, placing the DPF in a sealed container, wherein the outer wall of the DPF is connected with the inner wall of the container in a sealing way, and the container is divided into a first chamber and a second chamber by the DPF;
c2, injecting cleaning liquid into the container until the cleaning liquid in the first chamber or the second chamber reaches a set liquid level or a set hydraulic pressure; in this process, the cleaning liquid permeates into the pores of the DPF to contact with PM in the pores, and a part of PM is separated from the pores and enters the first chamber or the second chamber.
C3, turning on an ultrasonic generator to clean the DPF;
c4, closing the ultrasonic generator, and discharging the cleaning liquid in the first cavity and the second cavity;
c5, injecting the air into the container until the air pressure in the first chamber and the second chamber reaches a set air pressure value;
c6, rapidly opening the second chamber to enable PM attached in the DPF to be subjected to gas explosion and separated from the DPF;
and C7, opening the container, and taking out the DPF.
In this embodiment, since the air explosion is performed after the cleaning solution is discharged, a large amount of vaporized cleaning solution is contained in the high-pressure air in the air explosion process, and the density of the cleaning solution is higher than that of air, the residual PM can be stripped from the DPF pore path well to further dredge the DPF pore path, and meanwhile, the cleaning solution is gasified and carried out by using the high-speed injected gas, so that the cleaned DPF is dried.
The DPF cleaning method of the fourth embodiment of the invention comprises the following steps:
d1, placing the DPF in a sealed container, wherein the outer wall of the DPF is connected with the inner wall of the container in a sealing way, and the container is divided into a first chamber and a second chamber by the DPF;
injecting high-pressure air into the container until the air pressure in the first chamber and the second chamber reaches a set air pressure value, such as 0.6Mpa-1.0Mpa;
d3, rapidly opening the second chamber to enable PM attached in the DPF to be subjected to gas explosion and separated from the DPF;
d4, injecting cleaning liquid into the container until the cleaning liquid in the first chamber or the second chamber reaches a set liquid level or a set hydraulic pressure;
d5, turning on an ultrasonic generator to clean the DPF;
d6, closing the ultrasonic generator, and discharging the cleaning liquid in the first cavity and the second cavity;
and D7, opening the container, and taking out the DPF.
Preferably, the steps D2 and D3 are repeated several times, and then the step D4 is performed, and the steps D2 and D3 may be performed after the step D6 to drain the water in the DPF and dry the DPF.
More preferably, the DPF cleaning method comprises: in step D2, firstly, high-pressure air is supplied to the first chamber, the controller obtains the actual air pressure difference or air pressure difference curve of the first chamber and the second chamber, and the standard air pressure difference/actual air pressure difference is compared with the standard air pressure difference or air pressure difference curve of the fully dredged DPF, so that when the blocking condition of the DPF is reflected, the subsequent cleaning can be stopped if the standard air pressure difference/actual air pressure difference is larger than a certain standard, for example, 0.9,0.95, otherwise, the air explosion is continued; when the actual air pressure difference or the air pressure difference curve is very close to the air pressure difference obtained by two adjacent air explosion, the air explosion effect can be considered to be unobvious, and then the subsequent ultrasonic cleaning is carried out;
in step D5, in the ultrasonic cleaning process, cleaning liquid with certain pressure is continuously injected into the first chamber, and the liquid pressure in the first chamber is kept, at this time, the controller can obtain the actual liquid pressure difference between the first chamber and the second chamber, the same reference is made to the standard liquid pressure difference of the DPF which is completely dredged, when the value of the standard liquid pressure difference/the actual liquid pressure difference reaches a certain standard, for example 0.9,0.95, the subsequent cleaning can be stopped, the operation of the ultrasonic generator is stopped,
otherwise, continuing to wash, and continuing to step D2 to step D7 after continuing to step 5 when the actual liquid pressure difference drop in unit time is smaller than the set drop.
In this embodiment, carry out ultrasonic cleaning to DPF after the clearance of DPF gas explosion, can dredge most pore earlier through the gas explosion, when DPF blocks up seriously, the gas explosion is better than ultrasonic cleaning's effect to the clearance effect of PM, and the pore dredging of DPF after the gas explosion is followed anyway and is remained a part of PM, and at this moment again pour into the washing liquid into the pore of DPF into can let washout liquid and PM fully contact to realize better ultrasonic cleaning effect.
The present invention is not limited to the above embodiments, but is capable of modification in all aspects and variations in all aspects without departing from the spirit and scope of the present invention.
Claims (10)
1. The DPF cleaning device based on the gas explosion is characterized by comprising a container, a gas explosion quick-opening valve and a dust removing silencer which are sequentially connected in series, wherein the container is used for being connected with a high-pressure gas source, the dust removing silencer comprises a cover body, an outer layer cloth bag and an inner layer cloth bag, the cover body seals the opening of the outer layer cloth bag to form a cavity, the inner layer cloth bag is positioned in the cavity, the cover body is provided with a gas outlet which is in sealing connection with the opening of the inner layer cloth bag, and the cavity is used for being connected with the gas explosion quick-opening valve;
the vessel is divided by the DPF into a first chamber and a second chamber; a cover for sealing the container, a cover locking device and a cover opening device are arranged at the opening of the container, wherein the cover is hinged with the container; the cover is positioned at one end of the first chamber; a liquid level sensor is arranged in the first chamber and/or the second chamber and/or the cleaning liquid source; the container further comprises: an air pressure sensor for acquiring air pressure in the first chamber (1 a) and/or in the second chamber (1 b);
the cover locking device comprises a first bracket, a second bracket, a cover locking telescopic mechanism and a cover locking telescopic mechanism, wherein two ends of the cover locking telescopic mechanism are respectively hinged with the ends of the first bracket and the second bracket, the middle parts of the first bracket and the second bracket are respectively hinged with a container, and the ends of the first bracket and the second bracket, which are opposite to the cover locking telescopic mechanism, are respectively fixed with a lock catch for limiting the opening of the cover;
when the locking cover telescopic mechanism is fully extended, the first bracket and the second bracket enable the lock catch to abut against the cover or the container through rotation, and meanwhile, the lock catch limits the cover to be opened; when the locking cover telescopic mechanism is completely contracted, the first bracket and the second bracket release the restriction of the lock catch on the cover through rotation;
the cover opening telescopic mechanism and the cover locking telescopic mechanism are connected with the controller; an infrared sensor for detecting whether a person is near the opening of the container or not is arranged outside the cover or the container, and the infrared sensor is electrically connected with the controller; the controller is also electrically connected with the alarm device;
when the infrared sensor detects that a person is near the opening of the container, the controller does not send unlocking or uncapping signals to the locking and uncapping telescopic mechanisms and the uncapping telescopic mechanisms even if the controller receives an uncapping command, and meanwhile, the controller sends signals to the alarm device to enable the alarm device to send out sound and/or light to remind the person to leave the vicinity of the cover, and when no person is near the cover, the controller firstly controls the locking and uncapping telescopic mechanisms to unlock and then controls the uncapping telescopic mechanisms to open the cover;
the controller and the liquid level sensor, the air pressure sensor and the hydraulic pressure sensor in the container, when the controller detects that water or air with higher than atmospheric pressure is in the container, the controller can not send unlocking or uncapping information to the cover locking telescopic mechanism and the cover opening telescopic mechanism even if receiving a cover opening command, and meanwhile, the controller judges whether the lock catch is separated from the cover or not, if yes, the cover opening telescopic mechanism is controlled to open the cover, otherwise, a signal alarm is sent to the alarm device; after the controller controls the cover opening telescopic mechanism to open the cover, the controller judges whether the cover is opened in place or not, otherwise, the controller alarms;
when the controller uncovers the telescopic mechanism and closes the cover, the controller firstly judges whether the cover covers the container, if so, a cover locking signal is sent to the cover locking telescopic mechanism, otherwise, an alarm is given; after the locking cover telescopic mechanism sends out a locking cover signal, the controller judges whether the lock catch is engaged with the cover, otherwise, the controller alarms;
the gas explosion quick-opening valve comprises a valve seat and a valve clack, wherein the valve clack comprises a first piston, a second piston and a connecting column for connecting and fixing the first piston and the second piston; the valve seat comprises a first valve cavity for accommodating the first piston, a second valve cavity for accommodating the second piston and a partition plate for separating the first valve cavity and the second valve cavity, the first valve cavity is provided with an exhaust port and an air inlet which is matched and sealed with the first piston, the connecting column penetrates through the partition plate, the connecting column and the partition plate are mutually sealed, the second piston separates the second valve cavity into an open valve cavity and a closed valve cavity, the open valve cavity is positioned between the closed valve cavity and the first valve cavity, the open valve cavity is provided with an open valve port, and Guan Faqiang is provided with a closed valve port.
2. The DPF cleaning apparatus according to claim 1, wherein the gas in the cavity is communicated with the atmosphere through the outer layer cloth bag and the inner layer cloth bag.
3. The DPF cleaning apparatus according to claim 1, wherein a bag-type connecting wall is fixed between the cover and the outer layer bag-type bag, and the bag-type connecting wall is provided with a gas inlet connected with the gas explosion quick-opening valve.
4. The DPF cleaning apparatus according to claim 3, wherein the dust removing muffler further includes a support sleeve detachably connected to the cloth bag connecting wall, the support sleeve being provided with a plurality of through holes.
5. The DPF cleaning apparatus according to claim 1, wherein the outer cloth bag is sealingly detachably connected to the cloth bag connecting wall.
6. The DPF cleaning device according to claim 1, wherein the outer layer cloth bag and the inner layer cloth bag are respectively accommodated with an outer layer support cage and an inner layer support cage, and the outer layer support cage and the inner layer support cage are respectively used for preventing deformation of the outer layer cloth bag and the inner layer cloth bag.
7. The DPF cleaning apparatus according to claim 6, wherein the cover is fixed with a connection pipe passing through the cover, the connection pipe being connected and fixed with the inner layer cloth bag.
8. The DPF cleaning apparatus according to claim 1, wherein the inner layer cloth bag and the outer layer cloth bag are of a cylindrical bag-like structure.
9. The DPF cleaning device according to claim 1, wherein the inner layer cloth bag and the outer layer cloth bag are made of waterproof breathable fabric.
10. The DPF cleaning apparatus according to any one of claims 1 to 9, wherein the inner cloth bag and the outer cloth bag are for preventing water and PM from being discharged into the atmosphere.
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| CN201711071428.5A CN107900023B (en) | 2017-11-03 | 2017-11-03 | DPF cleaning device based on gas explosion |
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| CN108889746B (en) * | 2018-07-26 | 2021-04-02 | 南京溧水高新创业投资管理有限公司 | Air explosion cleaning equipment for columnar garbage can and using method |
| CN109764742A (en) * | 2018-11-27 | 2019-05-17 | 宁波亚洲浆纸业有限公司 | A kind of processing method of pipeline deposit adhesion object |
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| CN106334385A (en) * | 2016-11-18 | 2017-01-18 | 广西金邦泰科技有限公司 | Secondary filtering dust collecting bag device with high cleaning efficiency |
| CN207709472U (en) * | 2017-11-03 | 2018-08-10 | 宁波行泰环保科技有限公司 | A kind of DPF cleaning plants based on gas explosion |
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