Small-sized explosion-proof dust-removal circulating filtration all-in-one machine

Abstract

The utility model relates to a small-sized anti-explosion dedusting circulating filtration all-in-one machine which comprises a machine box, a preliminary sorting assembly, a filter cartridge bin, a filtering assembly, a first collecting mechanism and a tail end processing mechanism, the machine box is divided into a first mounting chamber, a second mounting chamber and a third mounting chamber, and the second mounting chamber is located below the first mounting chamber; the third mounting chamber is located on one side of the first mounting chamber and the second mounting chamber, the filter cartridge bin is located in the first mounting chamber, the filtering assembly is located in the filter cartridge bin and used for filtering impurities in gas entering the filter cartridge bin, and the first collecting mechanism is located in the second mounting chamber and used for collecting dust in the filter cartridge bin. The primary sorting assembly and the tail end treatment mechanism are located in the third mounting chamber, the tail end treatment mechanism is located above the primary sorting assembly, the primary sorting assembly is used for primary sorting of gas entering the filter cartridge bin, and the tail end treatment mechanism is used for final treatment of filtered gas. The utility model has the effect of reducing the overall volume.

Description

Technical Field

[0001] This application relates to the field of dust removal technology, and particularly to a small explosion-proof dust removal circulating filtration integrated machine. Background Art

[0002] During the 3D printing production process, when the accumulation of material dust reaches the flammable concentration, static electricity accumulates, or the temperature reaches the ignition point of the material dust, in the presence of oxygen, dangerous accidents such as explosions and intense combustion may occur. Therefore, during the 3D printing process, it is necessary to strictly control the generation and diffusion of dust, and effectively reduce or solve the probability of dangerous accidents.

[0003] Therefore, during the production process, it is necessary to timely collect or treat the dust generated during the 3D printing process, filter the dust in the gas through a filtering device, and discharge the gas after filtration again to reduce the dust content in the gas.

[0004] Normally, one printer needs to be equipped with one filtering device, but the integration degree of each component in the existing filtering device is relatively low, making the overall volume of the filtering device relatively large, occupying more production sites, and there is room for improvement. Utility Model Content

[0005] In order to reduce the overall volume, this application provides a small explosion-proof dust removal circulating filtration integrated machine.

[0006] A small explosion-proof dust removal circulating filtration integrated machine provided by this application adopts the following technical solutions:

[0007] A small explosion-proof dust removal circulating filtration integrated machine includes a chassis, a preliminary sorting component, a filter cartridge bin, a filtering component, a first collection mechanism, and a terminal treatment mechanism. The chassis is divided into a first installation chamber, a second installation chamber, and a third installation chamber. The second installation chamber is located below the first installation chamber, and the third installation chamber is located on one side of the first installation chamber and the second installation chamber. The filter cartridge bin is located in the first installation chamber, and the filtering component is located in the filter cartridge bin. The filtering component is used to filter impurities from the gas entering the filter cartridge bin. The first collection mechanism is located in the second installation chamber, and the first collection mechanism is used to collect the dust in the filter cartridge bin. The preliminary sorting component and the terminal treatment mechanism are located in the third installation chamber, and the terminal treatment mechanism is located above the preliminary sorting component. The preliminary sorting component is used to preliminarily sort the gas entering the filter cartridge bin, and the terminal treatment mechanism is used to finally treat the gas after filtration.

[0008] By adopting the above technical solution, the only space of the chassis is divided into modules, and the chassis is divided into a first installation chamber, a second installation chamber, and a third installation chamber. The filter cartridge bin is installed through the first installation chamber, the first collection mechanism is installed through the second installation chamber, and the preliminary sorting component and the end treatment mechanism are installed through the third installation chamber, so that the structures between the components are relatively compact, the space utilization rate of the chassis is improved, and it plays a positive guiding role in reducing the overall volume.

[0009] Preferably, the filtering component divides the filter cartridge bin into a first chamber and a second chamber. The air outlet of the preliminary sorting component is communicated with the first chamber, the air inlet of the end treatment mechanism is communicated with the second chamber, and the volume of the first chamber is larger than the volume of the second chamber.

[0010] By adopting the above technical solution, the volume of the first chamber is larger than the volume of the second chamber, which is beneficial to increasing the amount of gas entering the first chamber along the preliminary sorting component at the same time, and is beneficial to increasing the filtering efficiency of the filtering component. At the same time, after the gas is filtered by the filtering component, because the volume of the second chamber is smaller than the volume of the first chamber, when the gas filtered by the filtering component reaches the second chamber, it plays a certain pressurizing role on the gas in the second chamber, which is convenient for the gas to quickly flow to the end treatment mechanism.

[0011] Preferably, a main air inlet pipe is arranged in the third installation chamber. The free end of the main air inlet pipe penetrates through the third installation chamber from the top of the third installation chamber in the vertical direction and extends to the outside of the third installation chamber. The main air inlet pipe is used to connect to the air outlet of the printer, and the fixed end of the main air inlet pipe is connected to the air inlet of the preliminary sorting component.

[0012] By adopting the above technical solution, the main air inlet pipe is arranged in the vertical direction. When the gas containing dust enters the preliminary sorting component along the free end of the main air inlet pipe, some large particle dust in the gas will freely fall onto the preliminary sorting component under the action of gravity, reducing the amount of dust accumulating on the pipe wall of the main air inlet pipe, and reducing the probability of the main air inlet pipe being blocked due to dust accumulation on the main air inlet pipe.

[0013] Preferably, the preliminary sorting component includes a cyclone and a collecting hopper. The air inlet of the cyclone is connected to the fixed end of the main air inlet pipe. A secondary air inlet pipe is arranged in the third installation chamber. The fixed end of the secondary air inlet pipe is connected to the air outlet of the cyclone, the free end of the secondary air inlet pipe is connected to the first chamber, and the height of the fixed end of the secondary air inlet pipe in the vertical direction is lower than the height of the free end of the secondary air inlet pipe in the vertical direction.

[0014] By adopting the above technical solution, when the gas containing dust enters the cyclone barrel, some of the dust is affected by the centrifugal force exerted by the cyclone cylinder and will fall into the collection hopper. At the same time, since the height of the fixed end of the auxiliary air inlet pipe in the vertical direction is lower than the height of the free end of the auxiliary air inlet pipe in the vertical direction, the gas containing dust needs to move upward from bottom to top in the vertical direction. During this process, the dust will fall back into the cyclone cylinder or be in the auxiliary air inlet pipe due to the influence of gravity, which is beneficial to reducing the dust content in the gas entering the first chamber along the auxiliary air inlet pipe.

[0015] Preferably, a high-pressure fan is provided in the third installation chamber. The high-pressure fan is located at the bottom of the third installation chamber and behind the collection hopper. The air inlet of the high-pressure fan is connected to the second chamber, and the air outlet of the high-pressure fan is connected to the end treatment mechanism. The high-pressure fan is used to provide power for the gas flow.

[0016] By adopting the above technical solution, the high-pressure fan provides power for the gas flow, so as to quickly extract the gas in the second chamber along the second chamber, increase the gas circulation efficiency, and play a positive guiding role in improving the gas filtration efficiency.

[0017] Preferably, the filtering component includes a plurality of sintered plates. The plurality of sintered plates are arranged at equal intervals along the connection between the first chamber and the second chamber, and a gap for gas circulation is provided between any two adjacent sintered plates.

[0018] By adopting the above technical solution, the gas is filtered by a plurality of sintered plates at the same time to increase the filtration efficiency. At the same time, a gap for gas circulation is provided between two adjacent sintered plates, so that the gas can fully contact any sintered plate, reducing the probability of the situation that the gas flow is blocked between the two sintered plates due to the too close distance between the sintered plates.

[0019] Preferably, a baffle is provided at the bottom of the third installation chamber. The baffle is located between the high-pressure fan and the first collection mechanism.

[0020] By adopting the above technical solution, since the temperature of the gas containing dust discharged from the printer outlet is relatively high, the baffle isolates the high-pressure fan and the first collection mechanism to a certain extent, reducing the influence of the first collection mechanism on the normal operation of the high-pressure fan, or the influence of the high-pressure fan on the normal operation of the first collection mechanism.

[0021] Preferably, the end processing mechanism includes a cooler which is located above the high-pressure blower. The air inlet of the cooler is connected to the air outlet of the high-pressure blower. A first air discharge port is provided on the cooler. The first air discharge port penetrates through the third installation chamber and extends to the outside of the third installation chamber, and the first air discharge port is located in the middle section area of the third installation chamber in the height direction.

[0022] By adopting the above technical solution, the first air discharge port is located in the middle section of the third installation chamber, which is beneficial to shortening the discharge stroke of the gas cooled by the cooler. Since the first air discharge port penetrates through the third installation chamber and extends to the outside of the third installation chamber, the filtered gas is then discharged into the atmosphere, reducing the probability of the temperature in the third installation chamber rising due to the gas being discharged into the third installation chamber.

[0023] Preferably, an exhaust duct is further included. The free end of the exhaust duct is connected to the second chamber. The part of the exhaust duct located in the first installation chamber is fixedly connected to the outer side wall of the filter cartridge bin in the horizontal direction. When the exhaust duct reaches the third installation chamber, the exhaust duct bends vertically towards the bottom of the third installation chamber. At this time, the fixed end of the exhaust duct is connected to the air inlet of the high-pressure blower.

[0024] By adopting the above technical solution, the gas discharged from the second chamber needs to pass through the exhaust duct located in the first installation chamber first. Since the exhaust duct located in the first installation chamber is arranged horizontally, a buffer section is formed, and the temperature of the gas can be effectively reduced during this process. When the gas reaches the bending part of the exhaust duct, the gas directly impacts the bending part of the exhaust duct, which is beneficial to reducing the impact force of the gas, thereby reducing the impact force of the gas entering the high-pressure blower and playing a certain protective role for the high-pressure blower.

[0025] Preferably, an explosion-proof mechanism is further included. The explosion-proof mechanism includes an explosion suppression component and an inerting component. The explosion suppression component and the inerting component are sequentially arranged on the outside of the third installation chamber away from the first installation chamber and the second installation chamber. The explosion-proof mechanism includes a powder sprayer which is connected to the air inlet of the cyclone. The powder sprayer is used to introduce explosion suppression substances into the cyclone and the filter cartridge bin. The inerting component includes a first gas tank which is connected to the first chamber. The first gas tank is used to introduce inert gas into the first chamber.

[0026] By adopting the above technical solution, when deflagration or sparks occur in the cyclone, the powder sprayer injects explosion suppression substances into the cyclone to block dust combustion or extinguish the sparks; when the oxygen content in the filter cartridge bin is higher than the set value, inert gas is injected into the filter cartridge bin through the first gas tank to quickly reduce the oxygen content in the filter cartridge bin. At the same time, it can also be used as a flame retardant to make the oxygen content insufficient to reach the oxygen content required for dust combustion, so as to quickly block dust combustion and improve safety performance.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The space of the chassis is divided into three modules: the first installation chamber is used to install the filter cartridge bin, the second installation chamber installs the first collection mechanism, and the third installation chamber installs the preliminary sorting component and the end treatment mechanism. This modular division makes the internal structure of the chassis more compact, effectively improves the space utilization rate, and helps to reduce the overall volume;

[0029] 2. The main intake pipe is arranged vertically. When the gas containing dust enters the preliminary sorting component through the free end of the main intake pipe, the gravity makes the large-particle dust freely fall onto the preliminary sorting component. This design effectively reduces the accumulation of dust on the inner wall of the main intake pipe, thereby reducing the possibility of the main intake pipe being blocked by dust;

[0030] 3. When the gas containing dust enters the cyclone barrel, the dust is affected by the centrifugal force exerted by the cyclone, and part of the dust is collected by the collection hopper. At the same time, the fixed end of the auxiliary intake pipe is lower than the free end, and it is required that the gas moves upward from bottom to top in the vertical direction. This design effectively utilizes the influence of gravity to make the dust fall back into the cyclone or the auxiliary intake pipe again, which helps to reduce the dust content in the gas entering the first chamber. Description of the Drawings

[0031] Figure 1 is the overall structural schematic diagram of an explosion-proof dust removal and circulation filtration integrated machine in an embodiment of the present application.

[0032] Figure 2 is the structural schematic diagram of an explosion-proof dust removal and circulation filtration integrated machine with the frame hidden in an embodiment of the present application.

[0033] Figure 3 is Figure 2 the structural schematic diagram from the side view in

[0034] Figure 4 is the partial structural schematic diagram of the partition net, the guide member and the filter cartridge bin in an explosion-proof dust removal and circulation filtration integrated machine in an embodiment of the present application.

[0035] Figure 5It is a schematic structural diagram of a sintered plate in an explosion-proof dust removal circulating filter integrated machine in an embodiment of the present application.

[0036] Figure 6 It is a system principle block diagram among a PLC, a fire extinguishing controller, an explosion-proof controller, a first pneumatic butterfly valve, a second pneumatic butterfly valve, a third pneumatic butterfly valve, a fourth pneumatic butterfly valve, a fifth pneumatic butterfly valve, a powder sprayer, a pressure sensor, a temperature sensor, a differential pressure sensor, an oxygen sensor and a first air tank in an explosion-proof dust removal circulating filter integrated machine in an embodiment of the present application.

[0037] Explanation of reference numerals: 1. Chassis; 2. Filter cartridge bin; 21. First chamber; 22. Second chamber; 3. Filtering component; 31. Sintered plate; 311. Base; 312. Filtering part; 4. Mounting hole; 5. Air outlet; 6. Backwashing component; 61. Backwashing pipeline; 62. Second air tank; 7. Explosion vent panel; 8. First collection mechanism; 81. First ash hopper; 82. Blocking component; 821. First pneumatic butterfly valve; 822. Second pneumatic butterfly valve; 9. End treatment mechanism; 91. Cooler; 911. First exhaust air port; 92. Tail gas treatment component; 921. Fifth pneumatic butterfly valve; 922. Tail gas filter cartridge; 10. Preliminary sorting component; 101. Cyclone; 102. Collection hopper; 11. Explosion-proof mechanism; 111. Explosion-proof component; 1111. Powder sprayer; 1112. Fire extinguishing controller; 112. Inerting component; 1121. First air tank; 1122. Explosion-proof controller; 12. Guide part; 13. Partition net; 14. Flow-through part; 15. Controller; 151. PLC; 16. Backwashing solenoid valve; 17. Third pneumatic butterfly valve; 18. Fourth pneumatic butterfly valve; 19. High-pressure fan; 41. First installation chamber; 42. Second installation chamber; 43. Third installation chamber; 44. Main intake pipeline; 45. Auxiliary intake pipeline; 46. Baffle; 47. Exhaust pipeline; 48. Explosion-proof box. Detailed implementation manners

[0038] The following will further describe the present application in detail with reference to the Figures 1-6 accompanying drawings.

[0039] An embodiment of the present application discloses a small explosion-proof dust removal circulating filter integrated machine. Refer to Figure 1 and Figure 2, A small explosion-proof dust removal and circulation filtration integrated machine includes a chassis 1, a preliminary sorting component 10, a filter cartridge bin 2, a filtering component 3, a first collection mechanism 8, and a terminal treatment mechanism 9. The chassis 1 is divided into a first installation chamber 41, a second installation chamber 42, and a third installation chamber 43. The second installation chamber 42 is located below the first installation chamber 41, and the third installation chamber 43 is located on one side of the first installation chamber 41 and the second installation chamber 42. The filter cartridge bin 2 is located in the first installation chamber 41, and the filtering component 3 is located in the filter cartridge bin 2. The filtering component 3 is used to filter impurities from the gas entering the filter cartridge bin 2. The first collection mechanism 8 is located in the second installation chamber 42 and is used to collect the dust in the filter cartridge bin 2. The preliminary sorting component 10 and the terminal treatment mechanism 9 are located in the third installation chamber 43, and the terminal treatment mechanism 9 is located above the preliminary sorting component 10. The preliminary sorting component 10 is used to preliminarily sort the gas entering the filter cartridge bin 2, and the terminal treatment mechanism 9 is used to perform final treatment on the gas after filtering is completed.

[0040] Specifically, the external contour of the chassis 1 is set in a cuboid shape, and the interior of the chassis 1 is in a hollowed-out setting. The interior of the chassis 1 is divided into a left area and a right area along the height direction. The volume of the left area is larger than the volume of the right area. The first installation chamber 41 is located in the upper half of the left area, and the second installation chamber 42 is located in the lower half of the left area. The separated right area is the third installation chamber 43.

[0041] Furthermore, the dimensions of the chassis 1 are: length 1400 ± 100 mm, width 1300 ± 100 mm, height 2800 ± 100 mm (in international units, millimeters), so as to reduce the space occupied by the chassis 1.

[0042] Correspondingly, a controller 15 is also provided on the chassis 1, and the controller 15 is used to control the working states of the backwashing component 6, the preliminary sorting component 10, the first collection mechanism 8, and the terminal treatment mechanism 9.

[0043] Refer to Figure 2 and Figure 4 , The filtering component 3 divides the filter cartridge bin 2 into a first chamber 21 and a second chamber 22. The air outlet of the preliminary sorting component 10 is communicated with the first chamber 21, and the air inlet of the terminal treatment mechanism 9 is communicated with the second chamber 22. Moreover, the volume of the first chamber 21 is larger than the volume of the second chamber 22.

[0044] Specifically, the volume ratio of the first chamber 21 to the second chamber 22 is within the range of 4 to 6:1. In this embodiment, preferably, the volume ratio of the first chamber 21 to the second chamber 22 is 5:1, which is conducive to increasing the amount of gas entering the first chamber 21 along the preliminary sorting assembly 10 at the same time, and is conducive to increasing the filtering efficiency of the filtering assembly 3. At the same time, after the gas is filtered by the filtering assembly 3, since the volume of the second chamber 22 is smaller than that of the first chamber 21, when the gas filtered by the filtering assembly 3 reaches the second chamber 22, it plays a certain pressurizing role on the gas in the second chamber 22, facilitating the rapid flow of the gas to the end treatment mechanism 9.

[0045] Further, an installation hole 4 is opened on one side of the first chamber 21 close to the third installation chamber 43, and the air outlet of the preliminary sorting assembly 10 is connected to the first chamber 21 through the installation hole 4, so as to facilitate the disassembly and assembly between the preliminary sorting assembly 10 and the first chamber 21.

[0046] Correspondingly, a guiding member 12 is installed in the first chamber 21. The cross-sectional shape of the guiding member 12 is arranged in a "V" shape, and the guiding member 12 is located at the installation hole 4. Therefore, when the gas enters the first chamber 21 along the installation hole 4, the guiding member 12 makes the gas flow into the first chamber 21 along both ends of the guiding member 12, so that the gas entering the first chamber 21 quickly diffuses in the first chamber 21, which is conducive to increasing the filtering efficiency of the filtering assembly 3 for dust.

[0047] At the same time, a partition net 13 is arranged at the front end of the guiding member 12. A number of small holes are opened on the partition net 13, and the size of the small holes is set between 0.1 mm and 0.15 mm. When the gas flows into the first chamber 21 along both ends of the guiding member 12, the partition net 13 filters the gas reaching the first chamber 21, effectively blocking larger particles of dust from entering the first chamber 21, and when the gas passes through the partition net 13, through the turbulence effect of the partition net 13, it is conducive to quickly diffusing the gas into the first chamber 21.

[0048] Refer to Figure 2 and Figure 4 , the filtering assembly 3 includes a number of sintered plates 31. The number of sintered plates 31 is arranged at the connection between the first chamber 21 and the second chamber 22. At the same time, a pressure relief plate 7 is arranged on the filter cartridge bin 2, and the pressure relief plate 7 is used to release the pressure in the filter cartridge bin 2.

[0049] Specifically, the number of sintered plates 31 can be increased or decreased according to the size or shape of the filter cartridge bin 2. At the same time, the shape of the sintered plates 31 can also be changed to adapt to the filter cartridge bin 2. Since the shapes and constituent materials of the number of sintered plates 31 are the same, any one of the sintered plates 31 is taken for description below.

[0050] In this embodiment, six sintered plates 31 are provided. The outer contours of the six sintered plates 31 are all rectangular parallelepiped-shaped. The six sintered plates 31 are longitudinally arranged at equal intervals along the connection between the first chamber 21 and the second chamber 22, so that there is a gap for gas flow between two adjacent sintered plates 31, thereby increasing the contact area between the gas and the six sintered plates 31. The gas is filtered by the six sintered plates 31 simultaneously to increase the filtration efficiency. At the same time, there is a gap for gas flow between two adjacent sintered plates 31, and the ratio of the size of the gap to the thickness of the sintered plate 31 is in the range of 1.2 to 1.6:1, so that the gas can fully contact any sintered plate 31, reducing the probability of the situation where the gas flow is blocked along the gap between two sintered plates 31 due to the too-close distance between the sintered plates 31.

[0051] Furthermore, the sintered plate 31 can be sintered from polycarbonate. It has a number of holes of different sizes and has the characteristic of high air permeability. When dust reaches the sintered plate 31, part of the dust cannot pass through the holes on the sintered plate 31, realizing the filtration effect on the dust. It should be noted here that the sintered plate 31 is an existing impurity filtering component, and its specific composition and working principle will not be elaborated too much here.

[0052] Correspondingly, for better illustration, in this embodiment, the outer contour of the sintered plate 31 is rectangular parallelepiped-shaped. The sintered plate 31 includes a base 311 and a filtering part 312, and the base 311 and the filtering part 312 are integrally formed. When the sintered plate 31 is installed in the filter cartridge bin 2, the base 311 is located in the second chamber 22, and the filtering part 312 is located in the first chamber 21, so that the sintered plate 31 is stably installed in the filter cartridge bin 2.

[0053] At the same time, a number of flow-through parts 14 are formed by the sintered plate 31 being recessed from one end close to the base 311 to the end far from the base 311. It should be noted here that the flow-through parts 14 do not penetrate the filtering part 312, so that the filtering part 312 located in the first chamber 21 is in a closed state.

[0054] Moreover, the cross-sectional area of the flow-through parts 14 is between 50 mm and 150 mm, so that the gas filtered by the sintered plate 31 can smoothly flow along the flow-through parts 14 into the second chamber 22.

[0055] Therefore, when the gas enters the first chamber 21, the gas filters out some impurities through the filtering part 312, and the filtered gas flows into the second chamber 22 along the flow-through parts 14, greatly reducing the amount of dust in the gas.

[0056] In addition, the explosion vent panel 7 is installed on the filter cartridge bin 2, and the explosion vent panel 7 is located at the top of the first chamber 21. If the pressure in the first chamber 21 increases, it indicates that there is a deflagration situation in the first chamber 21. At this time, the explosion vent panel 7 will be opened under the influence of the pressure, thereby relieving the pressure in the first chamber 21 and reducing the probability of deformation or even explosion of the filter cartridge bin 2 caused by excessive pressure in the first chamber 21, which plays a positive guiding role in improving the safety performance.

[0057] It should be noted here that the explosion vent panel 7 is a conventional pressure sensing component. When the pressure is within the set range, the explosion vent panel 7 is in the closed state. When the pressure is greater than the set value, under the influence of the pressure, the explosion vent panel 7 will be in the open state. Its specific composition and working principle will not be elaborated here.

[0058] Refer to Figure 2 and Figure 3 , an air backwashing assembly 6 is arranged in the second chamber 22. The air backwashing assembly 6 includes a plurality of air backwashing pipes 61 and a second air tank 62. The second air tank 62 is connected to the plurality of air backwashing pipes 61. The second air tank 62 is used to supply air to the plurality of air backwashing pipes 61. The plurality of air backwashing pipes 61 are distributed in the filter cartridge bin 2, and the air outlet of the air backwashing pipe 61 faces the sintered plate 31.

[0059] Specifically, the composition of the plurality of air backwashing pipes 61 and the connection manner with the second air tank 62 are the same. Any one of the air backwashing pipes 61 is taken for illustration below. The air backwashing pipe 61 and the second air tank 62 are installed in the second chamber 22. The second air tank 62 is connected to the air backwashing pipe 61. The number of air backwashing pipes 61 is the same as the number of sintered plates 31. A plurality of air holes are formed along the length direction of the air backwashing pipe 61 to form the air outlet 5 of the air backwashing pipe 61. When the air backwashing pipe 61 is installed in the second chamber 22, the air outlet 5 of the air backwashing pipe 61 corresponds to the position and number of the flow-through parts 14 one by one, so that the air backwashing pipe 61 can inject gas into the flow-through parts 14 through the air outlet 5.

[0060] Correspondingly, refer to Figure 2 , Figure 3 and Figure 6 , the controller 15 includes a PLC 151 (Programmable Logic Controller, programmable logic controller 15) and a differential pressure sensor (not shown in the figure). The PLC 151 is installed on the chassis 1, and the differential pressure sensor is installed in the filter cartridge bin 2 for detecting the pressure difference between the first chamber 21 and the second chamber 22. The differential pressure sensor is electrically connected to the PLC 151.

[0061] Therefore, when the differential pressure sensor detects that the pressure difference between the first chamber 21 and the second chamber 22 deviates from the set value, it indicates that the sintered plate 31 is blocked. Subsequently, the differential pressure sensor sends the detection signal to the PLC 151, and the PLC 151 issues a control instruction to the backflush solenoid valve 16, causing the second gas tank 62 to communicate with the backflush pipeline 61. High-pressure gas is pumped out through the air outlet 5 of the backflush pipeline 61, so that the dust adsorbed on the surface of the sintered plate 31 is separated from the sintered plate 31, realizing the cleaning effect on the sintered plate 31.

[0062] It should be noted here that in order to reduce (or remove) the oxygen content in the filter cartridge bin 2, the gas filled in the second gas tank 62 is an inert gas (such as nitrogen), so as to effectively avoid the problem of providing an aerobic environment for dust combustion due to the high oxygen content in the filter cartridge bin 2.

[0063] Refer to Figure 1 and Figure 2 , the first collection mechanism 8 includes a first ash hopper 81 and a blocking component 82. The first ash hopper 81 is connected to the filter cartridge bin 2. The first ash hopper 81 is used to collect the dust in the filter cartridge bin 2. The blocking component 82 is arranged between the filter cartridge bin 2 and the first ash hopper 81. The blocking component 82 is connected to the filter cartridge bin 2 and the first ash hopper 81. The blocking component 82 is used to block the communication between the filter cartridge bin 2 and the first ash hopper 81.

[0064] Specifically, the blocking component 82 includes a first pneumatic butterfly valve 821 and a second pneumatic butterfly valve 822. The first pneumatic butterfly valve 821 is located below the filter cartridge bin 2, and the first pneumatic butterfly valve 821 is connected to the first chamber 21. At the same time, the second pneumatic butterfly valve 822 is located between the first pneumatic butterfly valve 821 and the first ash hopper 81. Thus, a buffer zone is formed between the first pneumatic butterfly valve 821 and the second pneumatic butterfly valve 822. The first pneumatic butterfly valve 821 and the second pneumatic butterfly valve 822 are electrically connected to the PLC 151.

[0065] Furthermore, the dust in the first chamber 21 will fall to the bottom of the first chamber 21. At this time, both the first pneumatic butterfly valve 821 and the second pneumatic butterfly valve 822 are in the closed state. When the dust in the first chamber 21 accumulates too much, the PLC 151 controls the first pneumatic butterfly valve 821 to open. At this time, the second pneumatic butterfly valve 822 is in the closed state, so that the dust in the first chamber 21 falls into the buffer zone. Subsequently, the PLC 151 controls the first pneumatic butterfly valve 821 to close. When the first pneumatic butterfly valve 821 is completely closed, the PLC 151 issues a control instruction to the second pneumatic butterfly valve 822 again. At this time, the second pneumatic butterfly valve 822 opens, and the dust in the buffer zone will fall into the first ash hopper 81. Subsequently, the second pneumatic butterfly valve 822 closes again, realizing the collection of dust.

[0066] Its function is to isolate the first chamber 21 and the first ash hopper 81 through the cooperation of the first pneumatic butterfly valve 821 and the second pneumatic butterfly valve 822. If an abnormal situation occurs in the first chamber 21, since the first pneumatic butterfly valve 821 and the second pneumatic butterfly valve 822 are in the closed state, the dust collected by the first ash hopper 81 will not be affected, reducing the probability of the dust stored in the first ash hopper 81 being ignited due to deflagration of the dust in the first chamber 21.

[0067] Meanwhile, when the dust in the first chamber 21 falls into the first ash hopper 81, the first pneumatic butterfly valve 821 and the second butterfly valve work alternately, reducing the probability of deflagration of the dust during the process of the dust in the first chamber 21 falling into the first ash hopper 81, resulting in simultaneous deflagration of the dust in the first chamber 21 and the first ash hopper 81.

[0068] Refer to Figure 1 and Figure 2 As shown in

[0069] In the third installation chamber 43, a main air inlet pipe 44 is provided. The free end of the main air inlet pipe 44 penetrates through the top of the third installation chamber 43 in the vertical direction and extends outside the third installation chamber 43. The main air inlet pipe 44 is used to connect to the air outlet of the printer. The fixed end of the main air inlet pipe 44 is connected to the air inlet of the preliminary sorting component 10. In this embodiment, the diameter of the main air inlet pipe 44 is 10 cm (international unit, centimeter) to ensure that the gas can flow smoothly from the air outlet of the printer into the preliminary sorting component 10.

[0070] Correspondingly, refer to Figure 1 and Figure 2 As shown in

[0071] Its function is that when the dust-containing gas enters the cyclone barrel, some of the dust is affected by the centrifugal force exerted by the cyclone cylinder 101 and will fall into the collection hopper 102. At the same time, since the height of the fixed end of the auxiliary air inlet pipe 45 in the vertical direction is lower than the height of the free end of the auxiliary air inlet pipe 45 in the vertical direction, the dust-containing gas needs to move upward from bottom to top in the vertical direction. During this process, the dust will fall back into the cyclone cylinder 101 or be in the auxiliary air inlet pipe 45 due to the influence of gravity, which is beneficial to reducing the dust content in the gas entering the first chamber 21 along the auxiliary air inlet pipe 45.

[0072] At the same time, a third pneumatic butterfly valve 17 and a fourth pneumatic butterfly valve 18 are sequentially arranged between the material receiving end of the cyclone cylinder 101 and the collection hopper 102. The functions of the third start butterfly valve and the fourth pneumatic butterfly valve 18 here are the same as those of the first pneumatic butterfly valve 821 and the second pneumatic butterfly valve 822 to achieve the isolation between the cyclone cylinder 101 and the receiving hopper, which will not be elaborated here.

[0073] Refer to Figure 2 , a high-pressure fan 19 is arranged in the third installation chamber 43. The high-pressure fan 19 is located at the bottom of the third installation chamber 43 and is behind the collection hopper 102. The air inlet of the high-pressure fan 19 is connected to the second chamber 22, and the air outlet of the high-pressure fan 19 is connected to the end treatment mechanism 9. The high-pressure fan 19 is used to provide power for the gas flow, so as to quickly extract the gas in the second chamber 22 along the second chamber 22, increase the gas circulation efficiency, and play a positive guiding role in improving the gas filtration efficiency.

[0074] At the same time, the power range of the high-pressure fan 19 is between 0.75 kW and 11 kW, which can be adjusted according to actual needs and the type of dust to be filtered, which is beneficial to maintaining the gas purification amount per unit time, so that the gas filtration efficiency range is 150 m 3 / h to 1100 m 3 / h (International System of Units, cubic meters per hour) to meet the air volume requirements of different needs.

[0075] Correspondingly, refer to Figure 2 , a baffle 46 is arranged at the bottom of the third installation chamber 43. The baffle 46 is located between the high-pressure fan 19 and the first collection mechanism 8.

[0076] Specifically, the baffle 46 is set as a heat insulation board. The baffle 46 is fixed to the side wall of the high-pressure blower 19 by bolts. When the baffle 46 is fixed to the side wall of the high-pressure blower 19, the baffle 46 is located between the first ash hopper 81 and the high-pressure blower 19. Since the gas containing dust discharged from the printer outlet is relatively high in temperature and the overall structure is relatively compact, the baffle 46 isolates the high-pressure blower 19 and the first ash hopper 81 to a certain extent, reducing the influence of the first ash hopper 81 on the normal operation of the high-pressure blower 19, or the influence of the high-pressure blower 19 on the normal operation of the first ash hopper 81.

[0077] Refer to Figure 1 , the end treatment mechanism 9 includes a cooler 91 and an exhaust gas treatment assembly 92. The cooler 91 is located above the high-pressure blower 19. The air inlet of the cooler 91 is connected to the air outlet of the high-pressure blower 19. A first air outlet 911 is provided on the cooler 91. The first air outlet 911 penetrates through the third installation chamber 43 and extends to the outside of the third installation chamber 43, and the first air outlet 911 is located in the middle section area of the third installation chamber 43 in the height direction. The exhaust gas treatment assembly 92 is located on the side wall of the third installation chamber 43 above the first air outlet 911. The air inlet of the exhaust gas treatment assembly 92 is connected to the air outlet of the cooler 91. The exhaust gas treatment assembly 92 is used for secondary filtration of the gas discharged from the second chamber 22.

[0078] Its function is that the first air outlet 911 is located in the middle section of the third installation chamber 43, which is conducive to shortening the discharge stroke of the gas cooled by the cooler 91. Since the first air outlet 911 penetrates through the third installation chamber 43 and extends to the outside of the third installation chamber 43, and then the filtered gas is discharged into the atmosphere, reducing the probability of the situation that the temperature in the third installation chamber 43 rises due to the gas being discharged into the third installation chamber 43.

[0079] Correspondingly, an exhaust duct 47 is also included. The free end of the exhaust duct 47 is connected to the second chamber 22. The part of the exhaust duct 47 located in the first installation chamber 41 is fixedly connected to the outer side wall of the filter cartridge bin 2 along the horizontal direction. When the exhaust duct 47 reaches the third installation chamber 43, the exhaust duct 47 bends vertically towards the bottom of the third installation chamber 43. At this time, the fixed end of the exhaust duct 47 is connected to the air inlet of the high-pressure blower 19.

[0080] Its function is that the gas discharged from the second chamber 22 needs to pass through the exhaust duct 47 located in the first installation chamber first. Since the exhaust duct 47 located in the first installation chamber is arranged horizontally, a buffer section is formed, and the temperature of the gas can be effectively reduced during this process. When the gas reaches the bend of the exhaust duct 47, the gas directly impacts the bend of the exhaust duct 47, which is beneficial to reducing the impact force of the gas, thereby reducing the impact force of the gas entering the high-pressure blower 19 and playing a certain protective role for the high-pressure blower 19.

[0081] Further, the cooler 91 can be an air-cooled cooler 91. In this embodiment, in order to reduce the oxygen content on site, the cooler 91 is set as a water-cooled cooler 91, and the filtered gas is cooled by means of water circulation.

[0082] Meanwhile, in this embodiment, the tail gas treatment assembly 92 is an optional assembly, and can also be assembled or disassembled according to actual needs, so that it can be adapted to places with high filtration requirements to minimize the dust content in the gas.

[0083] Correspondingly, referring to Figure 2 , the tail gas treatment assembly 92 includes a fifth pneumatic butterfly valve 921 and a tail gas filter cartridge 922. The fifth pneumatic butterfly valve 921 is installed on the first air outlet 911, and the fifth pneumatic butterfly valve 921 is electrically connected to the PLC 151. Meanwhile, the tail gas filter cartridge 922 is installed on the third installation chamber 43 above the fifth pneumatic butterfly valve 921, and the air inlet end of the tail gas filter cartridge 922 is connected to the cooler 91.

[0084] Therefore, when it is necessary to perform secondary filtration on the filtered gas, the PLC 151 issues a control instruction to the fifth pneumatic butterfly valve 921 to close the fifth pneumatic butterfly valve 921, so that the gas cooled by the cooler 91 reaches the tail gas filter cartridge 922, and the tail gas filter cartridge 922 performs secondary filtration on the filtered gas to further reduce the dust content in the gas.

[0085] Referring to Figure 1 , it further includes an explosion-proof mechanism 11. The explosion-proof mechanism 11 includes an explosion suppression component and an inerting component 112. The explosion suppression component and the inerting component 112 are sequentially arranged on the outer side of the third installation chamber 43 away from the first installation chamber 41 and the second installation chamber 42. The explosion-proof mechanism 11 includes a powder sprayer 1111. The powder sprayer 1111 is connected to the air inlet of the cyclone 101, and the powder sprayer 1111 is used to introduce an explosion suppression substance into the cyclone 101. The inerting component 112 includes a first gas tank 1121. The first gas tank 1121 is connected to the first chamber 21, and the first gas tank 1121 is used to introduce an inert gas into the first chamber 21.

[0086] It should be noted here that the explosion-proof mechanism 11 can be an optional component, which can be flexibly adjusted according to the chemical / physical properties of the dust to be filtered, and can be installed or disassembled according to actual needs.

[0087] Specifically, the explosion suppression component further includes a fire extinguishing controller 1112, a temperature sensor, and a pressure sensor. The powder sprayer 1111 is located outside the third installation chamber 43. At the same time, the fire extinguishing controller 1112 is located on the powder sprayer 1111. The temperature sensor and the pressure sensor are electrically connected to the fire extinguishing controller 1112, and the fire extinguishing controller 1112 is electrically connected to the PLC 151.

[0088] Specifically, a temperature sensor and a pressure sensor are installed in the cyclone 101 to facilitate the detection of the temperature and pressure inside the cyclone 101.

[0089] Correspondingly, when the temperature sensor and the pressure sensor cooperate to detect an increase in temperature and / or an increase in pressure inside the cyclone 101, it indicates that there may be a deflagration phenomenon inside the cyclone 101. The temperature sensor and / or the pressure sensor send the detection signal to the fire extinguishing controller 1112, and the fire extinguishing controller 1112 sends the signal to the PLC 151 again. The PLC 151 controls the powder sprayer 1111 to start working, so as to quickly extinguish the deflagrating dust and improve the safety performance.

[0090] In addition, the inerting component 112 further includes an explosion-proof controller 1122 and an oxygen sensor. The explosion-proof controller 1122 can be installed anywhere. The first gas tank 1121 is located between the powder sprayer 1111 and the outside of the third installation chamber 43. The explosion-proof controller 1122 and the oxygen sensor are electrically connected, and the explosion-proof controller 1122 is electrically connected to the PLC 151. The number of oxygen sensors can be set according to the actual situation, that is, oxygen sensors can be installed at any place where gas flows. The oxygen content is detected by the oxygen sensor. When the oxygen content in the filter cartridge bin 2 increases, the oxygen sensor sends the detection signal to the explosion-proof controller 1122, and the explosion-proof controller 1122 sends the detection signal to the PLC 151. The PLC 151 controls the first gas tank 1121 to conduct quickly, so as to quickly release inert gas (such as nitrogen) into the filter cartridge bin 2. The inert gas diffuses quickly, thereby reducing the oxygen content in the cyclone 101, the filter cartridge bin 2 and other places, effectively solving the problem that the deflagration of dust is aggravated due to too high oxygen content.

[0091] It should be noted that the explosion-proof controller 1122 and the fire extinguishing controller 1112 are electrically connected to the PLC 151 respectively, in order to meet the optional conditions, that is: when facing different dust filtration requirements, the inerting component 112 and / or the explosion suppression component can be flexibly selected to reduce the cost of gas filtering dust.

[0092] Therefore, the implementation principle of a small explosion-proof dust removal and circulation filtration integrated machine according to an embodiment of the present application is as follows: The only space in the chassis 1 is divided into modules. The chassis 1 is divided into a first installation chamber 41, a second installation chamber 42, and a third installation chamber 43. The filter cartridge bin 2 is installed through the first installation chamber 41, the first collection mechanism 8 is installed through the second installation chamber 42, and the preliminary sorting component 10 and the end treatment mechanism 9 are installed through the third installation chamber 43. Thus, the structures of the components are relatively compact, the space utilization rate of the chassis 1 is improved, which plays a positive guiding role in reducing the overall volume. The preliminary sorting component 10 preliminarily filters the dust in the gas. The gas after preliminary filtration reaches the first chamber 21, and the sintered plate 31 filters the gas again. Part of the dust will be concentrated and collected by the first ash hopper 81 under the influence of gravity. The gas after being filtered by the sintered plate 31 reaches the high-pressure fan 19 along the second chamber 22. The high-pressure fan 19 quickly transports the gas to the cooler 91. After being cooled by the cooler 91, the gas can be discharged to the atmosphere along the first air outlet 911, or the fifth pneumatic butterfly valve 921 is closed to force the gas to pass through the tail gas filter cartridge 922. After being filtered again by the tail gas filter cartridge 922, the gas is discharged to the atmosphere. At the same time, there is also an explosion-proof mechanism 11. The explosion-proof mechanism 11 effectively reduces the probability of dangerous accidents caused by the temperature being higher than the set value, the pressure being higher or lower than the set value, or the oxygen content being higher than the set value.

[0093] In addition, referring to Figure 2 , an explosion-proof box 48 is also provided in the third installation chamber 43. The explosion-proof box 48 is installed on the outer side wall of the filter cartridge bin 2, and the explosion-proof box 48 communicates with the first chamber 21. At the same time, an inhibitor is stored in the explosion-proof box 48. The inhibitor can be injected into the first chamber 21 through the explosion-proof box 48 to reduce the probability of explosion of the filter cartridge bin 2.

[0094] Among them, the inhibitor can be a chemical substance or a mixture of multiple chemical substances (such as sodium bicarbonate, ammonium dihydrogen phosphate, Class D fire extinguishing agent or water lamp), and is stored in the explosion-proof box 48 in a liquid state. In addition, the type of inhibitor can also be changed according to the actual physical shape and chemical properties of the dust.

[0095] Specifically, when the temperature sensor and / or pressure sensor in the first chamber 21 and / or the second chamber 22 detects an abnormal signal (the temperature and / or pressure value deviates from the set value), the detection signal is sent to the PLC 151. After processing the detection signal, the PLC 151 quickly issues a control instruction to the explosion-proof box 48, and the explosion-proof box 48 is quickly conducted, so as to quickly inject the inhibitor into the first chamber 21 and reduce the probability of deflagration or even explosion in the filter cartridge bin 2 and other places.

[0096] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A small explosion-proof dust removal and circulation filtration integrated machine, characterized in that: It includes a chassis (1), a preliminary sorting assembly (10), a filter cartridge bin (2), a filtering assembly (3), a first collection mechanism (8) and a terminal treatment mechanism (9). The chassis (1) is divided into a first installation chamber (41), a second installation chamber (42) and a third installation chamber (43). The second installation chamber (42) is located below the first installation chamber (41), and the third installation chamber (43) is located on one side of the first installation chamber (41) and the second installation chamber (42). The filter cartridge bin (2) is located in the first installation chamber (41), and the filtering assembly (3) is located in the filter cartridge bin (2). The filtering assembly (3) is used to filter impurities from the gas entering the filter cartridge bin (2). The first collection mechanism (8) is located in the second installation chamber (42), and the first collection mechanism (8) is used to collect the dust in the filter cartridge bin (2). The preliminary sorting assembly (10) and the terminal treatment mechanism (9) are located in the third installation chamber (43), and the terminal treatment mechanism (9) is located above the preliminary sorting assembly (10). The preliminary sorting assembly (10) is used to preliminarily sort the gas entering the filter cartridge bin (2), and the terminal treatment mechanism (9) is used to finally treat the gas after filtering is completed.

2. The small explosion-proof dust removal and circulation filtration integrated machine according to claim 1, characterized in that: The filtering assembly (3) divides the filter cartridge bin (2) into a first chamber (21) and a second chamber (22). The air outlet of the preliminary sorting assembly (10) communicates with the first chamber (21), and the air inlet of the terminal treatment mechanism (9) communicates with the second chamber (22), and the volume of the first chamber (21) is larger than the volume of the second chamber (22).

3. The small explosion-proof dust removal and circulation filtration integrated machine according to claim 2, characterized in that: A main air inlet pipe (44) is arranged in the third installation chamber (43). The free end of the main air inlet pipe (44) penetrates through the third installation chamber (43) from the top of the third installation chamber (43) in the vertical direction and extends to the upper part of the chassis (1). The main air inlet pipe (44) is used to connect the air outlet of the printer, and the fixed end of the main air inlet pipe (44) is connected to the air inlet of the preliminary sorting assembly (10).

4. The small explosion-proof dust removal and circulation filtration integrated machine according to claim 3, wherein: The preliminary sorting assembly (10) includes a cyclone (101) and a collection hopper (102). The air inlet of the cyclone (101) is connected to the fixed end of the main air inlet pipe (44). A secondary air inlet pipe (45) is arranged in the third installation chamber (43). The fixed end of the secondary air inlet pipe (45) is connected to the air outlet of the cyclone (101), and the free end of the secondary air inlet pipe (45) is connected to the first chamber (21), and the height of the fixed end of the secondary air inlet pipe (45) in the vertical direction is lower than the height of the free end of the secondary air inlet pipe (45) in the vertical direction.

5. The small explosion-proof dust removal and circulation filtration integrated machine according to claim 4, characterized in that: A high-pressure blower (19) is arranged in the third installation chamber (43). The high-pressure blower (19) is located at the bottom of the third installation chamber (43) and behind the collection hopper (102). The air inlet of the high-pressure blower (19) is connected to the second chamber (22), and the air outlet of the high-pressure blower (19) is connected to the end treatment mechanism (9). The high-pressure blower (19) is used to provide power for the gas flow.

6. The small explosion-proof dust removal and circulation filtration integrated machine according to claim 5, characterized in that: The filtering component (3) includes a plurality of sintered plates (31). The plurality of sintered plates (31) are arranged at equal intervals along the connection between the first chamber (21) and the second chamber (22), and a gap for gas flow is provided between any two adjacent sintered plates (31).

7. A small explosion-proof dust removal and circulation filtration integrated machine according to claim 5, characterized in that: A baffle (46) is arranged at the bottom of the third installation chamber (43). The baffle (46) is located between the high-pressure blower (19) and the first collection mechanism (8).

8. The integrated small explosion-proof dust removal and circulation filtration machine according to claim 5, characterized in that: The end treatment mechanism (9) includes a cooler (91). The cooler (91) is located above the high-pressure blower (19). The air inlet of the cooler (91) is connected to the air outlet of the high-pressure blower (19). A first air outlet (911) is arranged on the cooler (91). The first air outlet (911) penetrates through the third installation chamber (43) and extends to the outside of the third installation chamber (43), and the first air outlet (911) is located in the middle section of the third installation chamber (43) in the height direction.

9. The small explosion-proof dust removal and circulation filtration integrated machine according to claim 5, characterized in that: An exhaust pipe (47) is further included. The free end of the exhaust pipe (47) is connected to the second chamber (22). The part of the exhaust pipe (47) located in the first installation chamber (41) is fixedly connected to the outer side wall of the filter cartridge bin (2) in the horizontal direction. When the exhaust pipe (47) reaches the third installation chamber (43), the exhaust pipe (47) bends vertically towards the bottom of the third installation chamber (43). At this time, the fixed end of the exhaust pipe (47) is connected to the air inlet of the high-pressure blower (19).

10. A small explosion-proof dust removal and circulation filtration integrated machine according to claim 5, characterized in that: An explosion-proof mechanism (11) is further included. The explosion-proof mechanism (11) includes an explosion suppression component and an inerting component (112). The explosion suppression component and the inerting component (112) are sequentially arranged on the outer side of the third installation chamber (43) away from the first installation chamber (41) and the second installation chamber (42). The explosion-proof mechanism (11) includes a powder sprayer (1111). The powder sprayer (1111) is connected to the air inlet of the cyclone (101). The powder sprayer (1111) is used to introduce explosion suppression substances into the cyclone (101) and the filter cartridge bin (2). The inerting component (112) includes a first gas tank (1121). The first gas tank (1121) is connected to the first chamber (21). The first gas tank (1121) is used to introduce inert gas into the first chamber (21).

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