Filter residue humidity adjusting and automatic residue discharging method for filter

Abstract

The invention provides a filter residue humidity adjustable and automatic residue discharge method for a filter, which comprises a filter residue humidity adjustable method and a residue discharge method, and is implemented by using a filter residue humidity adjustable and automatic residue discharge device for the filter. Compressed gas purging is carried out on filter residues by utilizing a refiltering unit and an additional pneumatic unit which are arranged at a residue discharging opening in the bottom of the filter shell, and the filter residues are dried; compressed gas is introduced into the filter shell through the compressed gas inlet and the reverse blowing compressed gas inlet and is used for adjusting the humidity of filter residues and automatically discharging the residues; and the filter residue can be discharged from the filter in a non-contact or automatic manner. The method of bottom refiltration and additional gas purging and drying can be safer and more environment-friendly, less fluid or filter residue is wasted or scattered, the structure is simple, the investment is small, maintenance is avoided, the filter residue in the filter is completely sealed, and the filter residue in the filter is subjected to humidity control and discharged efficiently and uniquely.

Description

[0001] This application is a divisional application, and the information of the original application is as follows: application date August 18, 2022, application number 202210990589.9, and the invention title is a device and method for adjusting the humidity of filter residue and automatically discharging residue of a filter. Technical Field

[0002] The present invention relates to the technical field of filter residue discharging equipment, and particularly relates to a device and method for adjusting the humidity of filter residue and automatically discharging residue of a filter, so that the filtered matter or filter residue in the filter or separator can be discharged conveniently, safely, efficiently, economically and environmentally friendly. Background Art

[0003] In the prior art, most filters or separators adopt methods of filtering residue discharging or centrifugal residue discharging. High-quality treatment and discharging of the filter residue filtered out by the filter or separator is a difficult problem after filtration. Specifically, since the filter residue is mixed with the fluid in the filter, the humidity of the discharged residue is relatively high, and the filter residue is prone to clogging and caking, and sometimes it is very difficult to clean, which is not conducive to the subsequent treatment of the residue.

[0004] The traditional treatment method is manual slag removal, but the working environment of workers is very harsh, the workload is large, the labor intensity is also very high, the efficiency is low, and the risk is also very high in high-temperature, high-pressure, toxic and harmful scenarios. Summary of the Invention

[0005] The purpose of the present application is to provide a method for adjusting the humidity of filter residue and automatically discharging residue of a filter, so as to realize the treatment of the filter residue with compressed gas and then cleaning, make the filter residue easy to handle and clean, greatly reduce the labor intensity of workers, improve labor efficiency, and quickly restore the treatment capacity of the filter.

[0006] To achieve the above purpose, the present application provides a device for adjusting the humidity of filter residue and automatically discharging residue of a filter, which is arranged in a filter housing and includes:

[0007] A residue discharge port, arranged at the lower part of the filter housing for discharging filter residue;

[0008] A re-filtering unit, arranged at the residue discharge port, and the re-filtering unit is composed of several filter materials stacked layer by layer;

[0009] A pneumatic unit, the pneumatic unit includes a compressed gas inlet, a backflush compressed gas inlet, and a compressed gas outlet. The backflush compressed gas inlet is arranged at the side part of the filter housing, the compressed gas inlet is arranged at the top of the filter housing, and the compressed gas outlet is arranged at the residue discharge port. Compressed gas is introduced into the interior of the filter housing through the compressed gas inlet and the backflush compressed gas inlet for adjusting the humidity of the filter residue and automatically discharging the residue; in addition, these gas inlets and outlets can also be used for stripping operations.

[0010] This device is configured with a re - filtration unit installed at the lower part of the filter. Compressed gas is introduced into the filter housing, and the fluid in the filter is discharged from the filter housing through the re - filtration unit by the compressed gas. A slag discharge port is provided at the lower part of the filter to discharge the filter residue.

[0011] Furthermore, each filter medium layer is a filter membrane layer, or a filter tube layer, or a folded filter element layer, or a filter plate layer, or a filter mesh layer, or a filter paper layer, or a filter disc layer, or an orifice plate layer; the re - filtration unit is composed of one or more layers of filter medium layers such as a filter membrane layer, or a filter tube layer, or a folded filter element layer, or a filter plate layer, or a filter mesh layer, or a filter paper layer, or a filter disc layer, or an orifice plate layer stacked together.

[0012] Furthermore, the filtration accuracy of the re - filtration unit is 1 nanometer or above.

[0013] Furthermore, the filtration accuracy of the re - filtration unit is preferably 50 nanometers.

[0014] Furthermore, the slag discharge port is connected to a post - treatment assembly composed of one or more devices such as a valve, a cover plate, a blind plate, a pipe section, an elbow, a tee, a reducer, a stirrer, a screw, a barrel, a container, and a lifting mechanism to achieve smooth slag discharge, slag collection, and slag transportation.

[0015] Furthermore, the power source of the pneumatic unit is compressed gas with a pressure of 0.01 MPa or above, including one or more mixed gases such as compressed air, compressed nitrogen, compressed helium, or water vapor.

[0016] Furthermore, an air inlet, a flushing fluid port, a liquid discharge port, and an exhaust port are also provided on the filter housing.

[0017] Furthermore, the compressed gas inlet, the back - flush compressed gas inlet, the compressed gas outlet, and the back - flush compressed gas inlet are connected to a stripping device and can be used for stripping operations.

[0018] A method for adjusting the humidity of filter residue and automatic slag discharge of a filter, characterized by including a method for adjusting the humidity of filter residue and a method for slag discharge, and implementing the method by using a device for adjusting the humidity of filter residue and automatic slag discharge of the filter:

[0019] Using compressed gas to pre - discharge the fluid in the filter housing from the filter housing through the re - filtration unit, so as to fundamentally separate the filter residue from the fluid and control the fluid content in the filter residue; and cooperating with the injection of flushing oil or gas to soak the filter residue to achieve adjustable humidity of the filter residue;

[0020] Using the back - flush compressed gas inlet and the compressed gas outlet provided on the side of the filter housing to introduce back - flush compressed gas into the filter housing, and using the back - flush compressed gas to blow and dry the filter residue with compressed gas;

[0021] By using a re-filtering unit and an additional pneumatic unit provided at the slag discharge port at the bottom of the filter housing, compressed gas purging and drying of the filter residue are achieved; the compressed gas is introduced into the interior of the filter housing through the compressed gas inlet and the reverse blowing compressed gas inlet for adjusting the humidity of the filter residue and automatically discharging the slag; subsequently, the filter residue can be discharged from the filter non-contact or automatically.

[0022] Furthermore, the operation steps involved in the slag discharging method are as follows: when the differential pressure of the filter reaches a predetermined value, the oil inlet N1 and the oil outlet are closed, and the filter is taken out for treatment;

[0023] a. First drain the liquid: Open the drain port as the drain port N9 to drain the liquid, open the drain port N7 to drain completely, and then close the drain port N9 and the drain port N7;

[0024] b. Soak: Put in flushing oil and soak first;

[0025] c. Drain the liquid: Open the drain port N9 to drain the liquid, open the drain port N7 to drain completely, and then close the drain port N9 and the drain port N7;

[0026] d. Steam purging: Then open the air inlet N11, and high-temperature and high-pressure steam enters the filter. At this time, the drain port N9 is open; when the filter mesh holes are cleaned to a certain degree of through-hole, then open the nitrogen port N11 for high-pressure nitrogen purging until the filter mesh holes are completely penetrated;

[0027] e. Drain the liquid: Open the drain port N9 to drain the liquid, open the drain port N7 to drain completely, and then close the drain port N9 and the drain port N7. At this time, only dry slag remains after passing through the treatment re-filtering unit;

[0028] f. Discharge the slag: Open the slag discharge port N10 to discharge the slag, and then close the slag discharge port N10. At this time, the filter can resume its working state, and the inlet and outlet oil ports N1 and N2 are opened, and the others are closed.

[0029] Furthermore, the compressed gas purging method includes the following steps: Open the reverse blowing compressed gas inlet, and high-temperature and high-pressure compressed gas enters the filter; when the filter mesh holes are cleaned to a certain degree of through-hole, then open the compressed gas inlet for high-pressure nitrogen purging until the filter mesh holes are completely penetrated.

[0030] Furthermore, the power source of the pneumatic unit is compressed gas with 0.01 MPa or above.

[0031] Furthermore, the compressed gas includes compressed air, compressed nitrogen, compressed helium, or water vapor.

[0032] Furthermore, the compressed gas can be used alone, or one kind can be used first and then another kind.

[0033] Furthermore, the compressed gas inlet, the back-blowing compressed gas inlet, the compressed gas outlet, and the back-blowing compressed gas inlet are connected to a stripping device and can be used for stripping operations.

[0034] Furthermore, in the method, the filtering accuracy of the re-filtration unit is 1 nanometer or above, and the re-filtration unit is arranged at the slag discharge port in an inverted triangular cone shape to prevent the small particles of slag from being taken away during the process of liquid being squeezed out by the compressed gas.

[0035] Furthermore, the slag discharge port is connected to a post-processing component composed of one or more devices such as valves, cover plates, blind plates, pipe cuts, elbows, tees, reducers, stirrers, spirals, barrels, containers, and lifting mechanisms, which can further process the filter residue.

[0036] Furthermore, the method further comprises utilizing the filter residue humidity regulating port N8 provided on the filter housing to further regulate the humidity. When the pressure difference of the equipment reaches a predetermined value during operation, the equipment is cut out, the medium is discharged from the liquid discharge port N9, and the residual liquid is discharged from the drain port N7. For filter residues that are difficult to clean, high-temperature and high-pressure water vapor or oil gas is introduced from the filter residue humidity regulating port N8 to steam the residue to convert it into small particles as much as possible, thereby reducing solidification phenomena such as bridging of the residue, so that the residue can be discharged from the residue discharge port N10. If the fluidity of the residue is poor, water vapor, solvent oil, medium oil, etc. are introduced through the filter residue humidity regulating port N8 to soften the residue and enhance the fluidity of the residue, and finally the residue is discharged from the residue discharge port N10.

[0037] The present invention provides a device and method for adjusting the humidity of filter residue and automatically discharging residue. The filter separates the filtrate from the fluid in addition to a small amount attached to the filter material, and there are two major categories of filtrate deposited on the bottom of the filter or floating on the surface of the shell fluid. For these two major categories of filtrate or residue, the present method adopts the method of adding a re-filtration unit at the bottom of the shell and applying gas purging and drying, which can not only make the residue and the fluid fundamentally separated and realize the control of the fluid content in the residue, but also discharge the residue from the filter non-contact or automatically. The bottom re-filtration method with additional gas purging and drying of the present invention is more HSE, safer, more environmentally friendly, less waste or leakage of fluid or residue, and has a simple structure, low investment, maintenance-free, completely enclosed, efficient and unique way to control the humidity of the residue in the filter and discharge it.

[0038] The beneficial effects of the present invention are as follows:

[0039] 1. Since the dry residue is discharged, liquid discharge is reduced and pollution is reduced. This method is more HSE, safer, more environmentally friendly, and has less waste or spillage of fluid or filter residue.

[0040] 2. Simple structure, low investment, maintenance-free, completely enclosed, efficient and unique in controlling moisture in the filter residue and discharging it.

[0041] 3. The materials can be recycled to the maximum extent, saving materials.

[0042] 4. Improve the working environment, improve work efficiency, and reduce the labor intensity of workers. Description of the Drawings

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0044] Figure 1 Schematic structural diagram of a device for adjusting the humidity of filter residue and automatically discharging residue provided in this embodiment;

[0045] Figure 2 Schematic structural diagram of a device for adjusting the humidity of filter residue and automatically discharging residue provided in this embodiment;

[0046] Figure 3 Schematic connection structure diagram of the re - filtration unit of the present application and the flange plate at the lower end of the slag discharge port;

[0047] Explanation of the marks in the figure:

[0048] N1 inlet, N2 outlet, N3 vent port, N4 nitrogen inlet, N5 differential pressure gauge interface 1, N6 differential pressure gauge interface 2, N7 drain port 1, N8 utility port (also used as filter residue humidity adjustment port), N9 drain port 2, N10 slag discharge port, N11 back - blowing nitrogen inlet, N12 flushing oil inlet, A re - filtration unit. Detailed Embodiments

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific embodiments described here are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the orientation words such as "upper", "lower", "left", and "right" usually refer to the upper, lower, left, and right in the actual use or working state of the device, specifically the drawing direction in the drawings.

[0050] The present application provides a device for adjusting the humidity of filter residue and automatically discharging residue, which is arranged in the filter housing and includes:

[0051] The slag discharge port is arranged at the lower part of the filter housing for discharging filter residues.

[0052] The re - filtration unit, specifically as Figure 3 shown, is arranged at the slag discharge port. The re - filtration unit is composed of several filter media layers stacked together. Function of the re - filtration unit: In some actual working conditions in the chemical industry for a device with adjustable filter residue humidity and automatic slag discharge, the medium to be filtered and processed is a high - temperature and highly corrosive medium. Before discharging the slag material, our equipment takes some measures such as purging and drying the slag material. For example, nitrogen is first introduced, and then air is introduced, etc. As the gas enters, due to the increase in gas phase pressure, the residual medium in the slag material will be "squeezed" out, and the liquid flows away from the drain port. The re - filtration unit A is set at the slag discharge port position to prevent small - particle slag materials from being carried away during the process of the liquid being "squeezed" out and flowing away. The re - filtration unit is connected to the flange plate at the lower end of the slag discharge port.

[0053] The pneumatic unit includes a compressed gas inlet, a back - blowing compressed gas inlet, and a compressed gas outlet. The back - blowing compressed gas inlet is arranged at the side of the filter housing, the compressed gas inlet is arranged at the top of the filter housing, and the compressed gas outlet is arranged at the slag discharge port. The compressed gas is introduced into the interior of the filter housing through the compressed gas inlet and the back - blowing compressed gas inlet, which is used to adjust the humidity of the filter residue and automatically discharge the slag. In addition, these gas inlets and outlets can also be used for the stripping function.

[0054] This device adopts a re - filtration unit arranged at the lower part of the filter, and compressed gas is introduced into the filter housing. The fluid in the filter is discharged from the filter housing through the re - filtration unit by the compressed gas. A slag discharge port is arranged at the lower part of the filter for discharging filter residues.

[0055] Each filter media layer is a filter membrane layer, or a filter tube layer, or a folded filter element layer, or a filter plate layer, or a filter mesh layer, or a filter paper layer, or a filter disc layer, or an orifice plate layer; the re - filtration unit is composed of one or more filter media layers of a filter membrane layer, or a filter tube layer, or a folded filter element layer, or a filter plate layer, or a filter mesh layer, or a filter paper layer, or a filter disc layer, or an orifice plate layer stacked together.

[0056] Furthermore, the filtration accuracy of the re - filtration unit is 1 nanometer or above.

[0057] Furthermore, the filtration accuracy of the re - filtration unit is preferably 50 nanometers.

[0058] Furthermore, the slag discharge port is connected to a post - treatment assembly composed of one or more devices such as valves, covers, blind plates, pipe cuts, elbows, tees, reducers, stirrers, screws, barrels, containers, and lifting mechanisms connected in sequence to achieve smooth slag discharge, slag collection, and slag transportation.

[0059] Further, the power source of the pneumatic unit is a pressurized gas with a pressure of 0.01 MPa or more, including one or more of compressed air, compressed nitrogen, compressed helium, and water vapor.

[0060] Further, an air inlet, a flushing fluid port, a liquid discharge port, and an exhaust port are further provided on the filter housing.

[0061] The present application provides a method for adjusting the humidity of filter residues and automatically discharging residues for a device for adjusting the humidity of filter residues and automatically discharging residues as described in any one of the above. The method includes: a method of using a re-filtering unit and an additional pneumatic unit to achieve compressed gas purging and drying of filter residues. Compressed gas is introduced into the filter housing, and the fluid in the filter housing is discharged through the re-filtering unit to the residue discharge port of the filter housing by the compressed gas; the filter residues separated from the fluid include two major categories, namely, a small amount of residues adhering to the filter material and the rest deposited at the bottom of the filter or floating on the surface of the fluid in the housing. For these two major categories of filter residues, the filter residues are fundamentally separated from the fluid to control the fluid content in the filter residues, and then the filter residues can be discharged from the filter non-contact or automatically.

[0062] Further, the compressed gas purging method includes the following steps:

[0063] Open the reverse blowing compressed gas inlet, and the high-temperature and high-pressure compressed gas enters the filter to cook the dirt blocking the filter screen, liquefy it or separate it into fine particles, and fall to the bottom of the filter. At this time, the liquid discharge port is in an open state; when more than 95% of the filter screen holes are cleared, open the compressed gas inlet again to perform high-pressure nitrogen purging until 100% of the filter screen holes are penetrated.

[0064] Further, in the method, the filtration accuracy of the re-filtering unit is 1 nanometer or more, and the compressed gas is a single compressed gas such as compressed air, compressed nitrogen, compressed helium, water vapor, etc. with a pressure of 0.01 MPa or more, or a mixed gas, or first use one compressed gas and then use another compressed gas.

[0065] Embodiment 1

[0066] Please refer to Figure 1As shown, a device and method for adjusting the humidity of filter residue and automatically discharging residue in a filter of this embodiment perform compression gas treatment on the filter residue and then clean it, making the filter residue easy to handle and clean, greatly reducing the labor intensity of workers, improving labor efficiency, and quickly restoring the processing capacity of the filter. This method uses a re-filtering unit A arranged at the lower part of the filter, introducing compressed gas into the filter housing, and using the compressed gas to discharge the fluid in the filter through the re-filtering unit A from the filter housing. A slag discharge port is arranged at the lower part of the filter to discharge the filter residue. After the compressed gas enters the filter, it is mainly used to blow the filter residue, aiming to adjust the fluidity of the filter residue so that it can be discharged more smoothly at the slag discharge port, achieving the purpose of easy cleaning and labor saving.

[0067] The following combines the attached Figure 1 A device for adjusting the humidity of filter residue and automatically discharging residue in a filter of this embodiment is further described below (taking quenching oil as an example of the processing medium).

[0068] The slag discharge port is arranged at the lower part of the filter housing to discharge the filter residue; in this embodiment, the slag discharge port can be connected to valves, covers, pipe sections, elbows, tees, reducers, stirrers, screws, elevators or other devices to achieve smooth slag discharge.

[0069] The re-filtering unit A is arranged at the slag discharge port, and the re-filtering unit includes several filter material layers stacked together; in this embodiment, the re-filtering unit includes four filter material layers, and each filter material layer is selected as a filter membrane layer, which is composed of four filter membrane layers stacked together. By adjusting the filtration accuracy of the filter material, the desired accuracy can be obtained. For example, when the filtration accuracy of the filter material is 1 nanometer, this part of the re-filtering unit is of 1-nanometer accuracy. Of course, this is only an example here, and the number of filter material layers can also be changed, or other combinations of filter materials can be replaced.

[0070] The pneumatic unit, the pneumatic unit includes a compressed gas inlet, a backflush compressed gas inlet, and a compressed gas outlet. The backflush compressed gas inlet is arranged at the side part of the filter housing, the compressed gas inlet is arranged at the top of the filter housing, and the compressed gas outlet is arranged at the slag discharge port. The compressed gas is introduced into the interior of the filter housing through the compressed gas inlet and the backflush compressed gas inlet, and is used to adjust the humidity of the filter residue and automatically discharge the residue.

[0071] In this embodiment, the power source of the pneumatic unit is a pressurized gas with a pressure of 0.01 MPa or above, including one of compressed air, compressed nitrogen, compressed helium, and water vapor.

[0072] In this embodiment, an air inlet, a flushing fluid port, a liquid discharge port, and an exhaust port are also arranged on the filter housing.

[0073] The compressed gas may be compressed air, compressed nitrogen, compressed helium, water vapor, or other gaseous (vaporous) substances with a pressure of 0.01 MPa or higher.

[0074] The following further describes a method for adjusting the humidity of the filter residue and automatically discharging the residue in this embodiment (taking quenching oil as an example of the processing medium). As Figure 1 shown, the oil inlet serves as the inlet N1. The quenching oil enters the filter, and after passing through the filter element, the quenching oil flows out of the filter through the oil outlet as the outlet N2. At this time, the air inlet N11 is closed. When the pressure difference between the inlet and outlet N1 and N2 reaches a certain level, N1 and N2 are closed, and the filter is taken out of service. When the pressure difference between the inlet and outlet N1 and N2 returns to the rated value, N1 and N2 are opened, and the filter resumes operation. The dirt deposits at the bottom of the filter and is cleaned regularly. Figure 1

[0075] The process of cleaning the filter residue. When the filter pressure difference reaches the predetermined value, the oil inlet N1 and the oil outlet are closed, and the filter is taken out of service.

[0076] a. First, drain the liquid. Open the drain port as the drain port N9 to drain the liquid, and open the drain port N7 to drain completely. Then close N9 and N7.

[0077] b. Soak. Open the flushing oil inlet N12 to put in the flushing oil and soak first. Then close N12.

[0078] c. Drain the liquid. Open the drain port N9 to drain the liquid, and open the drain port N7 to drain completely. Then close N9 and N7.

[0079] d. Steam purging. Then open the air inlet N11, and high-temperature and high-pressure steam enters the filter to steam the dirt blocking the filter screen, causing it to liquefy or separate into fine particles and fall to the bottom of the filter. At this time, the drain port N9 is open. When more than 95% of the filter screen holes are cleared, then open the nitrogen port N11 to conduct high-pressure nitrogen purging until 100% of the filter screen holes are unblocked.

[0080] e. Drain the liquid. Open the drain port N9 to drain the liquid, and open the drain port N7 to drain completely. Then close N9 and N7.

[0081] At this time, only dry residue remains in the treatment and filtration unit.

[0082] f. Discharge the residue. Open the residue discharge port N10 to discharge the residue. Then close N10.

[0083] At this time, the filter can resume its working state. The inlet and outlet N1 and N2 are opened, and the others are closed.

[0084] It also includes as Figure 2 ​As shown, the humidity is further adjusted by using the filter residue humidity adjustment port N8 provided on the filter housing. When the pressure difference of the equipment reaches a predetermined value during operation, the equipment is cut out, the medium is discharged from the liquid discharge port N9, and the residual liquid is discharged from the drain port N7. For filter residues that are difficult to clean, high-temperature and high-pressure water vapor or oil gas is injected from the filter residue humidity adjustment port N8 to steam the residue, and convert it into small particles as much as possible to reduce the solidification phenomenon such as bridging of the residue, so that the residue can be discharged from the residue discharge port N10. If the fluidity of the residue is poor, water vapor, solvent oil, medium oil, etc. are introduced through the filter residue humidity adjustment port N8 to soften the residue and enhance the fluidity of the residue, and finally the residue is discharged from the residue discharge port N10.

[0085] Embodiment 2

[0086] Compared with the first embodiment, this embodiment is different in that:

[0087] The slag discharge port is arranged at the lower part of the filter housing to discharge the filter residue; in this embodiment, the slag discharge port can be connected to a valve, a cover plate, a pipe cut, an elbow, a tee, a reducer, a stirrer, a spiral, a lift or other devices to achieve smooth slag discharge.

[0088] The re-filtration unit A is arranged at the slag discharge port, and the re-filtration unit is composed of a plurality of stacked filter material layers; in the present embodiment, the re-filtration unit includes four filter material layers, each filter material layer is a filter tube layer, and is composed of four stacked filter membrane layers. The desired accuracy can be obtained by adjusting the filtering accuracy of the filter material. For example, when the filtering accuracy of the filter material is 30 nanometers, the accuracy of this part of the re-filtration unit is 30 nanometers. Of course, this is only an example, and the number of filter material layers can also be changed, or replaced with other combinations of filter materials.

[0089] A pneumatic unit, the pneumatic unit includes a compressed gas inlet, a back-blowing compressed gas inlet, and a compressed gas outlet. The back-blowing compressed gas inlet is arranged on the side of the filter housing, the compressed gas inlet is arranged on the top of the filter housing, and the compressed gas outlet is arranged at the slag discharge port. Compressed gas is passed into the filter housing through the compressed gas inlet and the back-blowing compressed gas inlet to adjust the humidity of the filter residue and automatically discharge the residue. In addition, according to the process requirements, this process can also perform steam stripping operations.

[0090] In this embodiment, the power source of the pneumatic unit is a pressure gas with a pressure of 5 MPa, including a mixed gas of compressed air, compressed nitrogen, compressed helium, and water vapor, such as a mixed gas of nitrogen and water vapor.

[0091] Embodiment 3

[0092] Compared with the first embodiment, this embodiment is different in that:

[0093] The slag discharge port is provided at the lower part of the filter housing for discharging filter residues. In this embodiment, the slag discharge port can be connected to valves, covers, pipe sections, elbows, tees, reducers, agitators, screws, elevators or other devices to achieve smooth slag discharge.

[0094] The re - filtration unit A is provided at the slag discharge port. The re - filtration unit is composed of several filter material layers stacked together. In this embodiment, the re - filtration unit includes four filter material layers. The first filter material layer is a filter tube layer, the second filter material layer is a folded filter element layer, the third filter material layer is a filter plate layer, and the fourth filter material layer is a filter mesh layer, which are stacked by four filter material layers. By adjusting the filtration accuracy of the filter materials, the desired accuracy can be obtained. For example, when the filtration accuracy of the filter materials is 50 nanometers, this part of the re - filtration unit has an accuracy of 50 nanometers. Of course, this is only an example here. The number of filter material layers can also be changed, or other combinations of filter materials can be used instead.

[0095] The pneumatic unit includes a compressed gas inlet, a back - blowing compressed gas inlet, and a compressed gas outlet. The back - blowing compressed gas inlet is provided at the side of the filter housing, the compressed gas inlet is provided at the top of the filter housing, and the compressed gas outlet is provided at the slag discharge port. The compressed gas is introduced into the interior of the filter housing through the compressed gas inlet and the back - blowing compressed gas inlet, which is used to adjust the humidity of the filter residues and automatically discharge the slag.

[0096] In this embodiment, the power source of the pneumatic unit is a pressurized gas with a pressure of 10 MPa, including a mixed gas of compressed air, compressed nitrogen, compressed helium, and water vapor, such as a mixture of nitrogen and water vapor.

[0097] Embodiment Four

[0098] The difference between this embodiment and Embodiment One is as follows:

[0099] The slag discharge port is provided at the lower part of the filter housing for discharging filter residues. In this embodiment, the slag discharge port can be connected to valves, covers, pipe sections, elbows, tees, reducers, agitators, screws, elevators or other devices to achieve smooth slag discharge.

[0100] The re - filtration unit A is provided at the slag discharge port. The re - filtration unit is composed of several filter material layers stacked together. In this embodiment, the re - filtration unit includes four filter material layers. The first filter material layer is a filter paper layer, the second filter material layer is a filter paper layer, the third filter material layer is a filter disc layer, and the fourth filter material layer is an orifice plate layer, which are stacked by four filter material layers. By adjusting the filtration accuracy of the filter materials, the desired accuracy can be obtained. For example, when the filtration accuracy of the filter materials is 100 nanometers, this part of the re - filtration unit has an accuracy of 100 nanometers. Of course, this is only an example here. The number of filter material layers can also be changed, or other combinations of filter materials can be used instead.

[0101] A pneumatic unit, the pneumatic unit includes a compressed gas inlet, a backflush compressed gas inlet, and a compressed gas outlet. The backflush compressed gas inlet is provided on the side of the filter housing, the compressed gas inlet is provided on the top of the filter housing, and the compressed gas outlet is provided at the slag discharge port. Compressed gas is introduced into the interior of the filter housing through the compressed gas inlet and the backflush compressed gas inlet, for adjusting the humidity of the filter residue and automatically discharging the slag.

[0102] In this embodiment, the compressed gas is used one after another, for example: first use nitrogen, and then use air. Steam can be introduced during the stripping operation.

[0103] In summary, the present invention provides a method for adjusting the humidity of the filter residue of a filter and automatically discharging the slag. The filter residues separated from the fluid by the filter are mainly divided into two categories, one is a small amount attached to the filter medium, and the other is deposited at the bottom of the filter or floating on the surface of the fluid in the housing. For these two categories of filter residues, this method adds a re-filtering unit at the bottom of the housing and applies gas purging and drying, which can not only fundamentally separate the filter residue from the fluid and control the fluid content in the filter residue, but also non-contact or automatically discharge the filter residue from the filter. This method of bottom re-filtering with additional gas purging and drying of the present invention is also applicable to the stripping operation, which can be more HSE, safer, more environmentally friendly, with less waste or escape of fluid or filter residue, and has a simple structure, small investment, maintenance-free, completely sealed, efficient and unique way to control the humidity of the filter residue in the filter and discharge it.

[0104] The beneficial effects of the present invention are as follows:

[0105] 1. Since the discharged is dry slag, it reduces liquid discharge and pollution. This method is more HSE, safer, more environmentally friendly, with less waste or escape of fluid or filter residue.

[0106] 2. It has a simple structure, small investment, maintenance-free, completely sealed, and can efficiently and uniquely control the humidity of the filter residue in the filter and discharge it.

[0107] 3. It can maximize the recovery of materials and save materials.

[0108] 4. It improves the working environment, improves work efficiency, and reduces the labor intensity of workers.

[0109] The above has introduced in detail a device and method for adjusting the humidity of the filter residue of a filter and automatically discharging the slag provided by the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter, characterized in that, It includes a method for adjusting the humidity of filter residue and a method for discharging residue, and implements the methods by using a device for adjusting the humidity of filter residue and automatically discharging residue of a filter: Using compressed gas to pre-discharge the fluid in the filter housing through a re-filtering unit from the filter housing, so as to fundamentally separate the filter residue from the fluid and control the fluid content in the filter residue; and cooperating with the injection of flushing oil or gas to soak the filter residue to achieve adjustable humidity of the filter residue; Using an anti-blowing compressed gas inlet and a compressed gas outlet provided on the side of the filter housing to introduce anti-blowing compressed gas into the filter housing, and using the anti-blowing compressed gas to blow the filter residue with compressed gas to dry the filter residue; Using a re-filtering unit and an additional pneumatic unit provided at the residue discharge port at the bottom of the filter housing to blow the filter residue with compressed gas to dry the filter residue; the compressed gas is introduced into the interior of the filter housing through the compressed gas inlet and the anti-blowing compressed gas inlet, and is used to adjust the humidity of the filter residue and automatically discharge the residue; then the filter residue can be discharged from the filter non-contact or automatically.

2. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter according to claim 1, characterized in that The operation steps involved in the method for discharging residue are: when the pressure difference of the filter reaches a predetermined value, the oil inlet N1 and the oil outlet are closed, and the filter is taken out for treatment; a. First drain the liquid: Open the drain port as the drain port N9 to drain the liquid, open the drain port N7 to drain, and close the drain port N9 and the drain port N7; b. Soak: Inject flushing oil and soak first; c. Drain the liquid: Open the drain port N9 to drain the liquid, open the drain port N7 to drain, and close the drain port N9 and the drain port N7; d. Steam purge: Then open the air inlet N11, and high-temperature and high-pressure steam enters the filter. At this time, the drain port N9 is open; when the filter screen holes are cleaned to a certain through-hole, then open the nitrogen port N11 to perform high-pressure nitrogen purge until the filter screen holes are penetrated; e. Drain the liquid: Open the drain port N9 to drain the liquid, open the drain port N7 to drain, and close the drain port N9 and the drain port N7. At this time, only dry residue remains after passing through the treatment re-filtering unit; f. Discharge the residue: Open the residue discharge port N10 to discharge the residue, and close the residue discharge port N10. At this time, the filter can resume its working state, and the inlet and outlet oil ports N1 and N2 are opened, and the others are closed.

3. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter according to claim 1, characterized in that, The method for blowing with compressed gas includes the following steps: Open the anti-blowing compressed gas inlet, and high-temperature and high-pressure compressed gas enters the filter; when the filter screen holes are cleaned to a certain through-hole, then open the compressed gas inlet to perform high-pressure nitrogen purge until the filter screen holes are penetrated.

4. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter according to claim 1, characterized in that, The power source of the pneumatic unit is compressed gas with a pressure of 0.01 MPa or above.

5. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter according to claim 1 or 4, characterized in that, The compressed gas includes compressed air, compressed nitrogen, compressed helium, or water vapor.

6. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter according to claim 5, characterized in that, The compressed gas can be used alone, or one kind can be used first and then another kind.

7. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter according to claim 1, characterized in that, The compressed gas inlet, the anti-blowing compressed gas inlet, the compressed gas outlet, and the anti-blowing compressed gas inlet are connected to a stripping device and can be used for stripping operations.

8. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter according to claim 1, characterized in that, In the method, the filtering accuracy of the re-filtering unit is 1 nanometer or above, and the re-filtering unit is arranged in an inverted triangular pyramid column shape at the residue discharge port to prevent small particle residues from being carried away during the process of the liquid being squeezed out and flowing away by the compressed gas.

9. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter according to claim 1, characterized in that, The slag discharge port is connected to a post-treatment assembly composed of one or more devices such as valves, covers, blind plates, pipe sections, elbows, tees, reducers, agitators, screws, barrels, containers, and lifting mechanisms, which can further process the filter residue.

10. A method for adjusting the humidity of filter residue and automatically discharging residue of a filter according to claim 1, characterized in that, It also includes using the filter residue humidity adjustment port N8 provided on the filter housing for further humidity adjustment. During operation, when the pressure difference of the equipment reaches a predetermined value, the equipment is cut out, the medium is discharged from the liquid discharge port N9, and the residual liquid is drained from the drain port N7. For filter residues that are not easy to clean, high-temperature and high-pressure steam or oil and gas is flushed into the filter residue through the filter residue humidity adjustment port N8 to steam the slag material, and it is transformed into small particle slag material as much as possible to reduce solidification phenomena such as slag bridging, so that the slag material can be discharged from the slag discharge port N10. If the fluidity of the slag material is poor, steam, solvent oil, medium oil, etc. are introduced through the filter residue humidity adjustment port N8 to soften the slag material and enhance its fluidity, and finally the slag material is discharged from the slag discharge port N10.

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