A meltblown equipment filtration system and control system

Abstract

The present invention discloses a filtering system for a meltblown device, which includes a filtering device, a feed channel and a discharge channel respectively communicated with the filtering device. The filtering device includes a filter element, and the filter element includes a first interface and a second interface. Between the first interface and the second interface, there are provided several layers of filter meshes. A forward channel and a backflush channel are communicated between the feed channel and the filtering device. The forward channel is communicated with the first interface, the backflush channel is communicated with the second interface, and the discharge channel is communicated with the second interface. Heating jackets for heating the forward channel and the backflush channel and cooling jackets for cooling the forward channel and the backflush channel are respectively arranged on the outer sides of the forward channel and the backflush channel. The present invention can easily realize the backflush operation of the filtering device, and can directly clean the filtering device during production and processing, greatly improving the production and processing efficiency. The present invention also discloses a filtering control system for a meltblown device.

Description

Technical Field

[0001] The present invention relates to the technical field of meltblown equipment, and particularly relates to a meltblown equipment filtration system and a control system. Background Art

[0002] When using meltblown equipment for production and processing, filtration of meltblown materials is required. With traditional filtration devices, the filtration device is prone to clogging during the filtration process and needs to be cleaned regularly, which affects the production and processing efficiency. Moreover, in the field of meltblown equipment, the meltblown material needs to be kept at a high temperature during transportation in the pipeline so that the meltblown material remains in a molten state and flows in the pipeline. If the filtration device needs to be cleaned during the operation process, it will not only affect the production and processing efficiency but also cause a large amount of heat energy loss, which is not conducive to reducing production costs. Summary of the Invention

[0003] The purpose of the present invention is to provide a meltblown equipment filtration system that can easily perform the backwashing operation of the filtration device, and can directly clean the filtration device during production and processing, greatly improving the production and processing efficiency.

[0004] To solve the above problems, the present invention is implemented according to the following technical solutions:

[0005] A meltblown equipment filtration system provided by the present invention includes a filtration device, a feed channel and a discharge channel respectively communicated with the filtration device. The filtration device includes a filter element, and the filter element includes a first interface and a second interface. Between the first interface and the second interface, there are provided several layers of filter meshes. A forward channel and a backwash channel are communicated between the feed channel and the filtration device. The forward channel is communicated with the first interface, the backwash channel is communicated with the second interface, and the discharge channel is communicated with the second interface;

[0006] On the outer sides of the forward channel and the backwash channel, there are respectively provided heating jackets for heating the forward channel and the backwash channel, and cooling jackets for cooling the forward channel and the backwash channel.

[0007] Further, it further includes a temperature control device. A temperature control medium is provided in the temperature control device. The temperature control medium includes a heating medium and a cooling medium. The temperature control device includes a heating accommodation cavity for placing the heating medium and a cooling accommodation cavity for placing the cooling medium. The temperature of the heating medium is higher than that of the cooling medium. The heating accommodation cavity is communicated with the two heating jackets, and the cooling accommodation cavity is communicated with the two cooling jackets.

[0008] Further, the heating jacket includes a first heating jacket and a second heating jacket. The first heating jacket is disposed outside the forward channel, and the second heating jacket is disposed outside the backwash channel.

[0009] The heating cavity is provided with a heating pipe. One end of the heating pipe facing away from the heating cavity is connected with a first heating branch pipe and a second heating branch pipe. The first heating branch pipe is communicatively connected between the heating pipe and the first heating jacket, and the second heating branch pipe is communicatively connected between the heating pipe and the second heating jacket.

[0010] A three-way solenoid valve is arranged at the connection of the heating pipe, the first heating branch pipe and the second heating branch pipe.

[0011] Further, the filtering device further includes a medium jacket and a heating sleeve. The medium jacket is sleeved outside the filter element, and the heating sleeve is sleeved outside the medium jacket.

[0012] The bottoms of the first heating jacket and the second heating jacket are both communicatively connected with a medium diversion pipe. The medium diversion pipe is communicatively connected with the medium jacket. A medium return pipe is further arranged on the medium jacket. One end of the medium return pipe facing away from the medium jacket is communicatively connected with a first return pipe and a second return pipe. The first return pipe is communicatively connected with the first heating jacket, and the second return pipe is communicatively connected with the second heating jacket. A three-way solenoid valve is arranged between the first return pipe and the second return pipe.

[0013] Further, the cooling jacket includes a first cooling jacket and a second cooling jacket. The first cooling jacket is disposed outside the forward channel, and the second cooling jacket is disposed outside the backwash channel.

[0014] The cooling cavity is provided with a cooling pipe. The cooling pipe includes a first cooling pipe and a second cooling pipe. A first cooling valve is arranged on the first cooling pipe, and a second cooling valve is arranged on the second cooling pipe. The first cooling pipe is communicatively connected with the first cooling jacket, and the second cooling pipe is communicatively connected with the second cooling jacket.

[0015] Further, the temperature control device is further provided with a medium return pipe. One end of the medium return pipe is communicatively connected with the cooling cavity, and the other end is communicatively connected between the first cooling valve on the first cooling pipe and the first cooling jacket.

[0016] Further, the filtering device further includes a buffer mechanism and a waste valve. The second interface is disposed at the top of the filter element. The waste valve is disposed at the bottom of the filtering device. The buffer mechanism is disposed between the filter element and the waste valve. The buffer mechanism includes a base. A groove for the elastic member to perform telescopic movement is provided in the middle of the base. One end of the elastic member is fixedly disposed at the bottom of the groove, and the other end is connected to the bottom of the filter element.

[0017] Further, the cross-section of the filter screen is wavy; the filter screen is wound around the same axis to form a mesh cylinder. The inside of the mesh cylinder is communicated with the second interface, and the outer surface of the mesh cylinder is communicated with the first interface. Moreover, the size of the filter holes of the filter screen gradually becomes smaller from outside to inside.

[0018] Further, it further includes pressure sensors, including a first pressure sensor and a second pressure sensor. The first pressure sensor is disposed at the feed channel, and the second pressure sensor is disposed at the discharge channel.

[0019] A meltblown equipment filtering control system, characterized in that it includes a control device and the above-mentioned meltblown equipment filtering system. The control device is electrically connected to the meltblown equipment filtering system to control the meltblown equipment filtering system to perform filtering operations.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the meltblown equipment filtering system of the present invention, by providing a backflush channel, the backflush operation of the filtering device can be realized, so that the filtering device can be cleaned synchronously during the production and processing process without the need for separate disassembly and cleaning, greatly improving the production and processing efficiency. Moreover, heating jackets and cooling jackets are provided on the outer sides of the forward channel and the backflush channel to realize temperature control in the forward channel and the backflush channel. During normal filtering operations, the heating jacket heats the forward channel to keep the meltblown material in a molten state and flow in the forward channel, and the cooling jacket cools the backflush channel, so that the meltblown material flowing into the backflush channel solidifies, thereby blocking the backflush channel. Conversely, during the backflush operation, the heating jacket heats the backflush channel, and the solidified meltblown material returns to the molten state again, while the cooling jacket cools the forward channel, so that the meltblown material in the forward channel solidifies to block the forward channel. Through the heating jacket and the cooling jacket, the control of the conduction and blocking of the forward channel and the backflush channel can be easily realized. The operation is simple and convenient, facilitating the backflush operation. The backflush operation and normal filtering operations can be quickly switched, and the impact of the backflush operation on the efficiency of normal filtering operations can be greatly reduced.

[0022] The present invention also provides a filtration control system for a meltblown device. By controlling the above-mentioned filtration system of the meltblown device through a control device, automated operation can be achieved, which is beneficial to improving the production and processing efficiency and can also reduce labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further elaborates on the specific embodiments of the present invention in conjunction with the drawings, where:

[0024] Figure 1 is a schematic structural diagram of a filtration system for a meltblown device according to the present invention;

[0025] Figure 2 is a schematic structural diagram of the buffer mechanism according to the present invention;

[0026] Figure 3 is a schematic cross-sectional structural diagram of the filter element according to the present invention;

[0027] Figure 4 is a schematic structural diagram of the filter screen according to the present invention;

[0028] Figure 5 is a schematic cross-sectional structural diagram of a filter element with a wavy ring structure according to the present invention;

[0029] In the figure:

[0030] 1 - filtration device; 11 - filter element; 111 - filter screen; 1111 - filter holes; 112 - inner cavity; 12 - buffer mechanism; 121 - base; 122 - elastic member; 123 - buffer gasket; 13 - waste valve; 2 - temperature control device; 21 - heating mechanism; 211 - medium jacket; 212 - heating jacket; 213 - heating pipe; 214 - first heating branch pipe; 215 - second heating branch pipe; 216 - three-way solenoid valve; 22 - cooling mechanism; 221 - first cooling pipe; 222 - second cooling pipe; 223 - first cooling valve; 224 - second cooling valve; 23 - medium return pipe; 3 - feed channel; 31 - forward channel; 311 - first heating jacket; 312 - first cooling jacket; 32 - backwash channel; 321 - second heating jacket; 322 - second cooling jacket; 33 - medium guide pipe; 4 - discharge channel; 51 - first pressure sensor; 52 - second pressure sensor; 6 - temperature sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to more clearly understand the above-mentioned objects, features, and advantages of the present application, the present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present application. The described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0032] It should be noted that, unless otherwise specified, when a certain feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right, etc. descriptions used in the present invention are only relative to the mutual positional relationship of the components of the present invention in the accompanying drawings. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments, and are not intended to limit the present application.

[0033] As Figures 1-5 shown, a meltblown equipment filtration system includes a filtration device 1, a feed channel 3 and a discharge channel 4 that are respectively communicated with the filtration device 1. The filtration device 1 includes a filter element 11. The filter element 11 includes a first interface and a second interface. Between the first interface and the second interface, there are provided several layers of filter meshes 111. Inside the several layers of filter meshes 111, there is an inner cavity 112, and the inner cavity 112 is communicated with the second interface. A forward channel 31 and a backflush channel 32 are communicatively provided between the feed channel 3 and the filtration device 1. The forward channel 31 is communicated with the first interface, and the backflush channel 32 is communicated with the second interface. The discharge channel 4 is communicated with the second interface. Heating jackets for heating the forward channel 31 and the backflush channel 32 and cooling jackets for cooling the forward channel 31 and the backflush channel 32 are respectively provided on the outer sides of the forward channel 31 and the backflush channel 32, and the temperature control of the forward channel 31 and the backflush channel 32 is achieved through the heating jackets and the cooling jackets.

[0034] The filter device also includes a temperature control device 2, which includes a heating mechanism 21, a cooling mechanism 22 and a temperature control medium. The heating mechanism 21 is sleeved on the outside of the filter device, and the heating mechanism 21, the heating jacket and the cooling mechanism 22 are connected by a pipeline. The cooling jacket and the cooling mechanism 22 are connected by a pipeline. The temperature control medium is set as a flowing medium, and the temperature control medium flows into the heating mechanism to be heated and transformed into a gaseous state, and the temperature control medium flows into the cooling mechanism to be cooled and transformed into a liquid state. In this embodiment, the cooling mechanism 22 is set as a condenser. The heating mechanism 21 heats the temperature control medium into a gaseous state, and inputs the heated gaseous temperature control medium into the heating jacket to heat the forward channel 31 or the recoil channel 32, and then the gaseous temperature control medium flows into the cooling mechanism 22 through a pipeline, and becomes a liquid after cooling, and then the cooled temperature control medium is input into the cooling jacket through the cooling mechanism 22 to cool the forward channel 31 or the recoil channel 32, so as to achieve a temperature control effect.

[0035] Specifically, the heating jacket includes a first heating jacket 311 and a second heating jacket 321. The first heating jacket 311 is arranged outside the forward channel 31, and the second heating jacket 321 is arranged outside the recoil channel 32. The heating mechanism 21 is provided with a heating pipe 213. The end of the heating pipe 213 away from the heating mechanism 21 is connected with a first heating branch pipe 214 and a second heating branch pipe 215. The first heating branch pipe 214 is arranged between the heating pipe 213 and the first heating jacket 311, and the second heating branch pipe 215 is arranged between the heating pipe 213 and the second heating jacket 321. A three-way solenoid valve 216 is arranged at the connection between the heating pipe 213, the first heating branch pipe 214 and the second heating branch pipe 215, and the flow direction of the temperature control medium in the pipe is controlled by the three-way solenoid valve 216.

[0036] The cooling jacket includes a first cooling jacket 312 and a second cooling jacket 322. The first cooling jacket 312 is arranged outside the forward channel 31, and the second cooling jacket 322 is arranged outside the recoil channel 32. The cooling mechanism 22 is provided with a cooling pipeline, and the cooling pipeline includes a first cooling pipeline 221 and a second cooling pipeline 222. The first cooling pipeline 221 is provided with a first cooling valve 223, and the second cooling pipeline 222 is provided with a second cooling valve 224. The first cooling pipeline 221 is in communication with the first cooling jacket 312, and the second cooling pipeline 222 is in communication with the second cooling jacket 322.

[0037] In this embodiment, the temperature control medium used is biphenyl, wherein the heating medium is gaseous biphenyl and the cooling medium is liquid biphenyl. The temperature difference between the gaseous and liquid biphenyl is used as a medium switch to realize the conduction and closure of the forward channel 31 and the recoil channel, and finally realize the recoil of the filter device 1, so that the filter device 1 can maintain an effective filtering effect and avoid blockage of the filter device 1.

[0038] Specifically, during normal filtration operation, the three-way solenoid valve 216 is opened to connect the heating pipe 213 to the first heating branch pipe 214, and the connection between the heating pipe 213 and the second heating branch pipe 215 is closed, so as to heat and evaporate the biphenyl through the heating mechanism 21. The evaporated gaseous biphenyl enters the first heating jacket 311 through the heating pipe 213 and the first heating branch pipe 214 to heat the forward channel 31. At the same time, the first cooling valve 223 is in the closed state, and the second cooling valve 224 is opened to connect the second cooling pipe 222 to the second cooling jacket 322, so as to cool the biphenyl through the cooling mechanism 22. The cooled liquid biphenyl enters the second cooling jacket 322 through the second cooling pipe 222 to cool the backflush channel 32. After the molten state meltblown material is input from the feed channel 3, it can maintain the molten state and flow normally when passing through the forward channel 31, and solidify due to the temperature reduction when passing through the backflush channel, blocking the backflush channel 32, that is, the forward channel 31 is in the conducting state, while the backflush channel 32 is in the blocked state. Thus, the meltblown material can enter the filtration device 1 through the forward channel 31, enter from the outer first interface of the filter element 11, enter the inner cavity 112 after being filtered by the filter screen 111, and then be discharged from the discharge channel 4.

[0039] When performing the backflush operation, the three-way solenoid valve 216 is opened to connect the heating pipeline 213 to the second heating branch pipe 215, and the connection between the heating pipeline 213 and the first heating branch pipe 214 is closed. Thus, the biphenyl is heated and evaporated by the heating mechanism 21, and the evaporated gaseous biphenyl enters the second heating jacket 321 through the heating pipeline 213 and the second heating branch pipe 215 to heat the backflush channel 32. At the same time, the second cooling valve 224 is closed, and the first cooling valve 223 is opened to connect the first cooling pipeline 221 to the first cooling jacket 312. Thus, the biphenyl is cooled by the cooling mechanism 22, and the cooled liquid biphenyl enters the first cooling jacket 312 through the first cooling pipeline 221 to cool the forward channel 31. When the molten state of the meltblown material is input from the feed channel 3, it can maintain the molten state and flow normally when passing through the backflush channel 32, while it solidifies due to the temperature drop when passing through the forward channel 31. That is, the backflush channel 32 is in the conducting state, while the forward channel 31 is in the blocked state. Thus, the meltblown material can enter the inner cavity 112 of the filter element 11 through the backflush channel 32 and backflush from the inner cavity 112 of the filter element 11 to the outside of the filter element 11, washing away the impurities attached to the filter screen 111 of the filter element 11 and restoring the permeability of the filter element 11 to achieve the cleaning of the filter element 11. In this embodiment, the second interface is provided at the top of the filter element 11, and a waste valve 13 is further provided at the bottom of the filtering device 1. When performing the backflush operation, the backflush material backflushes into the filter element 11 from the second interface at the top of the filter element 11. At this time, the waste valve 13 at the bottom of the filtering device 1 is opened, so that the washed-away impurities are discharged from the waste valve 13 at the bottom, preventing subsequent impurities from blocking the filtering device 1 again.

[0040] As Figures 3-4 shown, specifically, in this embodiment, the cross-section of the filter screen 111 of the filter element 11 is wavy, and the filter screen 111 is wound around the same axis to form a mesh cylinder, which can achieve multiple filtrations and make the filtration more thorough. An inner cavity 112 is provided inside the mesh cylinder, and the inner cavity 112 is communicated with the second interface. The outer surface of the mesh cylinder is communicated with the first interface. The size of the filter holes 1111 of the filter screen 111 gradually becomes smaller from the outside to the inside. When the meltblown material enters the filter element 11 from the forward channel 31, it enters from the outside to the inside, first passing through the larger filter holes 1111 and then through the smaller filter holes 1111, effectively ensuring the smooth flow of the meltblown material and not easily causing blockage directly on the outside of the filter element 11. Moreover, when performing the backflush operation, the meltblown material backflushes out from the inner cavity 112. Since the inner filter holes 1111 are smaller and the attached impurities are also smaller, it is not easy to get stuck in the external filter holes 1111 when backflushing from the inside to the outside, making the impurities on the filter element 11 cleaner during backflush.

[0041] Of course, as Figure 5As shown, the shape of the filter screen 111 can also be set as several layers of annular structures formed around the same axis, which can also achieve the effect of multiple filtration. Such a technical solution also falls within the protection scope of the present invention. More preferably, in the present invention, the filter screen 111 is made of an elastic material, so that during backwashing, the filter element 11 can expand under the action of the backwashing force, causing the filter holes 1111 on the filter screen 111 to open, which is more conducive to the cleaning of impurities. Moreover, using an elastic material can also effectively reduce the damage of the backwashing force to the filter element 11 and improve the service life of the filter element 11.

[0042] More preferably, the heating mechanism 21 further includes a medium jacket 211 for storing and flowing the temperature control medium and a heating jacket 212 for heating the medium jacket 211. The medium jacket 211 is sleeved outside the filter element 11, and the heating jacket 212 is sleeved outside the medium jacket 211. By heating the medium jacket 211 with the heating jacket 212, the biphenyl in the medium jacket 211 is heated and evaporated into gaseous biphenyl. Medium diversion pipes 33 are connected and arranged at the bottoms of the first heating jacket 311 and the second heating jacket 321. The medium diversion pipes 33 are connected to the medium jacket 211. When the gaseous biphenyl in the first heating jacket 311 and the second heating jacket 321 undergoes heat exchange and its temperature decreases, part of it changes back to liquid biphenyl, falls into the medium diversion pipes 33 from the bottom, and finally flows into the medium jacket 211. At this time, through the reheating of the heating jacket 212, the liquid biphenyl is vaporized into gaseous biphenyl again for recycling. More preferably, sleeving the medium jacket 211 outside the filter element 11 can also heat the filter element 11 at the same time, avoiding the filter element 11 from being blocked due to the temperature of the meltblown material decreasing and solidifying when passing through the filter element 11.

[0043] More preferably, the temperature control device 2 is also provided with a medium return pipe 23. One end of the medium return pipe 23 is connected to the cooling mechanism, and the other end is connected between the first cooling valve 233 provided on the first cooling pipe 221 and the first cooling jacket 312. During normal filtration operation, the forward channel 31 is in a high-temperature state. At this time, the liquid biphenyl in the first cooling jacket 312 is vaporized into gaseous biphenyl under the action of the high temperature. This part of the gaseous biphenyl can be transported back to the cooling mechanism 22 through the medium return pipe 23 to realize the recycling of the medium. At the same time, it can also effectively prevent the pressure in the first cooling jacket 312 and the first cooling pipe 221 from being too high due to the vaporization of the liquid biphenyl, ensuring the safety of the equipment.

[0044] Preferably, the filter device 1 further comprises a buffer mechanism 12, which is arranged between the filter element 11 and the waste valve 13. When the backflushing operation is implemented, the backflushing material is introduced into the inner cavity 112 of the filter element 11 from the second interface at the top of the filter element 11, exerting a certain downward impact force on the filter element 11. The buffer mechanism 12 is provided to mitigate the impact on the filter element 11, and to avoid collision between the filter element 11 and the waste valve 13, thereby effectively protecting the filter element 11 and the waste valve 13 from damage, which is conducive to extending the service life of the filter element 11 and the waste valve 13.

[0045] The buffer mechanism 12 includes a base 121, and a groove for the elastic member 122 to telescopically move is provided in the middle of the base 121. One end of the elastic member 122 is fixedly provided at the bottom of the groove, and the other end is connected to the bottom of the filter element 11. In the present embodiment, the elastic member 122 used is a spring, which is convenient for material collection, maintenance and replacement. Of course, other elastic members 122 can also be replaced if the effect of the present embodiment can be achieved. Moreover, in the present embodiment, a buffer gasket 123 is also provided between the elastic member 122 and the filter element 11, which is used to buffer the impact force between the filter element 11 and the elastic member 122, further protect the filter element 11 and the elastic member 122, and can effectively improve the service life of the entire device.

[0046] Preferably, the melt-blown equipment filtration system is further provided with a pressure sensor, which includes a first pressure sensor 51 and a second pressure sensor 52, wherein the first pressure sensor 51 is provided at the feed channel 3, and the second pressure sensor 52 is provided at the discharge channel 4. By measuring the pressure at the feed channel 3 and the pressure at the discharge channel 4, the patency of the filter device 1 can be intuitively determined. If the pressure at the discharge channel 4 is lower than the pressure at the feed channel 3 to a certain extent, it indicates that a certain blockage has been reached in the filter device 1, and a backwash operation can be arranged according to the specific situation to ensure the smoothness of the melt-blown material filtration.

[0047] Preferably, the melt-blown equipment filtration system is also provided with a temperature sensor 6. In the present embodiment, the temperature sensor 6 is provided on the heating mechanism 21 and the cooling mechanism 22 to monitor the temperature of the heating mechanism 21 and the cooling mechanism 22 to ensure that the temperature of the heating medium and the cooling medium meets the requirements, and also ensure that the temperature in the filter device 1 meets the requirements, thereby ensuring the stability of the melt-blown material flow and filtration. Of course, to achieve better temperature monitoring, the temperature sensor 6 can also be provided on the first cooling jacket 312 of the forward channel 31 and the second cooling jacket 322 of the recoil channel 32, respectively, so as to be able to monitor the temperature in the forward channel 31 and the recoil channel 32 in real time, to avoid the forward channel 31 and the recoil channel 32 being simultaneously turned on or blocked, or the flow of the melt-blown material in the channel being affected by insufficient temperature.

[0048] In this invention patent, a meltblown equipment filtration control system is also provided, which includes a control device and the above-mentioned meltblown equipment filtration system. The control device is electrically connected to the meltblown equipment filtration system to control the meltblown equipment filtration system to perform filtration operations and improve filtration efficiency. In this embodiment, the control device uses a PLC controller to achieve automatic filtration operations through the PLC controller, which is simple and convenient and is beneficial to improving operation efficiency.

[0049] Specifically, the control device monitors the value P1 of the first pressure sensor 51 and the value P2 of the second pressure sensor 52. When the difference between P1 and P2 is within the set range value, the control device controls the three-way solenoid valve 216 to open the connection between the heating pipeline 213 and the first heating branch pipe 214 and close the connection between the heating pipeline 213 and the second heating branch pipe 215. At the same time, the control device controls the first cooling valve 223 to close and the second cooling valve 224 to open, and the meltblown material normally performs filtration operations. When the difference between P1 and P2 exceeds the set range value, the control device controls the three-way solenoid valve 216 to open the connection between the heating pipeline 213 and the second heating branch pipe 215 and close the connection between the heating pipeline 213 and the first heating branch pipe 214. At the same time, the control device controls the second cooling valve 224 to close and the first cooling valve 223 to open, and the filtration device 1 performs backwashing operations. The automatic filtration operation is achieved through the control device, which greatly improves the filtration efficiency and reduces the input of labor costs at the same time.

[0050] More preferably, the control device monitors the temperature value of the temperature sensor 6. When the value of the temperature sensor 6 exceeds the preset temperature value range of the control device, an alarm can be realized, and even the filtration operation can be stopped to ensure the safety of the operation process.

[0051] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by this claim.

Claims

1. A meltblown equipment filtration system, characterized in that, It includes a filtering device, a feed channel and a discharge channel respectively communicating with the filtering device. The filtering device includes a filter element, and the filter element includes a first interface and a second interface. There are several layers of filter screens arranged between the first interface and the second interface. A forward channel and a backflush channel are communicatively arranged between the feed channel and the filtering device. The forward channel communicates with the first interface, the backflush channel communicates with the second interface, and the discharge channel communicates with the second interface; The filtering device further includes a buffer mechanism and a waste valve; The cross-section of the filter screen is wavy; On the outer sides of the forward channel and the backflush channel, there are respectively arranged a heating jacket for heating the forward channel and the backflush channel, and a cooling jacket for cooling the forward channel and the backflush channel; During normal filtering operation, after the melt-blown material in a molten state is input from the feed channel, it can maintain a molten state and flow normally when passing through the forward channel, while it solidifies due to temperature reduction when passing through the backflush channel, blocking the backflush channel. Thus, the melt-blown material can enter the filtering device through the forward channel and then be discharged from the discharge channel; During backflush operation, after the melt-blown material in a molten state is input from the feed channel, it can maintain a molten state and flow normally when passing through the backflush channel, while it solidifies due to temperature reduction when passing through the forward channel. Thus, the melt-blown material can enter the inner cavity of the filter element through the backflush channel and backflush from the inner cavity of the filter element to the outside of the filter element.

2. The meltblown equipment filtration system according to claim 1, wherein, It further includes a temperature control device. The temperature control device includes a heating mechanism, a cooling mechanism and a temperature control medium. The heating mechanism is sleeved on the outside of the filtering device. The heating mechanism, the heating jacket and the cooling mechanism are connected by pipelines; the cooling jacket and the cooling mechanism are connected by pipelines; The temperature control medium is set as a flowing medium. The temperature control medium flows into the heating mechanism and is heated to turn into a gaseous state, and the temperature control medium flows into the cooling mechanism and is cooled to turn into a liquid state.

3. The meltblown equipment filtration system according to claim 2, characterized in that, The heating jacket includes a first heating jacket and a second heating jacket. The first heating jacket is arranged on the outside of the forward channel, and the second heating jacket is arranged on the outside of the backflush channel; The heating mechanism is provided with a heating pipeline. One end of the heating pipeline departing from the heating mechanism is connected with a first heating branch pipe and a second heating branch pipe. The first heating branch pipe is communicatively arranged between the heating pipeline and the first heating jacket, and the second heating branch pipe is communicatively arranged between the heating pipeline and the second heating jacket; A three-way solenoid valve is arranged at the connection of the heating pipeline, the first heating branch pipe and the second heating branch pipe.

4. The meltblown equipment filtration system according to claim 3, characterized in that, The heating mechanism includes a medium jacket for the flow and storage of the temperature control medium and a heating jacket for heating the medium jacket. The medium jacket is sleeved on the outside of the filtering device, and the heating jacket is sleeved on the outside of the medium jacket; A medium diversion pipe is connected and arranged at the bottom of both the first heating jacket and the second heating jacket, and the medium diversion pipe is connected to the medium jacket.

5. The meltblown equipment filtration system according to claim 2, wherein, The cooling jacket includes a first cooling jacket and a second cooling jacket. The first cooling jacket is arranged on the outer side of the forward channel, and the second cooling jacket is arranged on the outer side of the backwash channel. The cooling mechanism is provided with a cooling pipeline, which includes a first cooling pipeline and a second cooling pipeline. A first cooling valve is arranged on the first cooling pipeline, and a second cooling valve is arranged on the second cooling pipeline. The first cooling pipeline is connected to the first cooling jacket, and the second cooling pipeline is connected to the second cooling jacket.

6. The meltblown equipment filtration system according to claim 5, characterized in that, The cooling mechanism is further provided with a medium return pipe. One end of the medium return pipe is connected to the cooling mechanism, and the other end is connected and arranged between the first cooling valve on the first cooling pipeline and the first cooling jacket.

7. A meltblown equipment filtration system according to any one of claims 1-6, characterized in that, The second interface is arranged at the top of the filter element, the waste valve is arranged at the bottom of the filtering device, and the buffer mechanism is arranged between the filter element and the waste valve. The buffer mechanism includes a base, and a groove for the elastic member to stretch and move is arranged in the middle of the base. One end of the elastic member is fixedly arranged at the bottom of the groove, and the other end is connected to the bottom of the filter element.

8. A meltblown equipment filtration system according to any one of claims 1-6, characterized in that, The filter screen is wound around the same axis to form a mesh cylinder. The inside of the mesh cylinder is connected to the second interface, and the outer surface of the mesh cylinder is connected to the first interface, and the pore size of the filter screen gradually becomes smaller from outside to inside.

9. A meltblown equipment filtration system according to any one of claims 1-6, characterized in that, It further includes pressure sensors, which include a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged at the feed channel, and the second pressure sensor is arranged at the discharge channel.

10. A meltblown equipment filtration control system, characterized in that, It includes a control device and a meltblown equipment filtering system according to any one of claims 1-9. The control device is electrically connected to the meltblown equipment filtering system to control the meltblown equipment filtering system to perform filtering operations.

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