Filtering device and pressure filtering system

Abstract

The utility model relates to the technical field of filter cloth flushing of pressure filters, in particular to a filter device and a pressure filter system. The filtering device comprises a working bin, a liquid inlet pipe, a liquid outlet pipe, a cleaning pipe and a filtering assembly; the filtering assembly is arranged in the working bin and divides the interior of the working bin into a filtrate area and a stock solution area which are arranged at an interval up and down; the liquid outlet end of the liquid inlet pipe, the liquid inlet end of the liquid outlet pipe and the liquid outlet end of the cleaning pipe all extend into the working bin, the liquid outlet end of the liquid inlet pipe is located in the stock solution area, the liquid inlet end of the liquid outlet pipe is located in the filtrate area, and the liquid outlet end of the cleaning pipe is located in the filtrate area and faces the filtering assembly. When the filtering device is applied to a pressure filtering system of a coal preparation plant, circulating water of the coal preparation plant can be filtered, so that the circulating water can be conveyed into an automatic cleaning device of the pressure filtering system to serve as a water source of the automatic cleaning device, and the production cost is reduced. Meanwhile, the cleaning pipe is arranged to automatically clean the filtering assembly, and the situation that the filtering device cannot be used due to blockage of the filtering assembly can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of filter cloth washing of a pressure filter, in particular to a filtering device and a pressure filtering system. Background Art

[0002] The pressurized filtration system includes a pressurized filter and an automatic cleaning device, and the automatic cleaning device is used to perform high-pressure washing on the filter cloth of the pressurized filter so that the filter cloth can be recycled. A pressurized filtration system is generally configured in a coal preparation plant to separate solid particles from a suspension to achieve solid-liquid separation. At present, the pressurized filtration system of a coal preparation plant generally uses tap water as the water source for the automatic cleaning device, resulting in high costs. If the circulating water in the coal preparation plant is used instead of tap water as the water source for the automatic cleaning device, the normal operation of the pressurized filtration system will be affected due to excessive impurities in the circulating water. In view of this, the utility model provides a filtering device and a pressurized filtration system including the above-mentioned filtering device, which are used to filter the circulating water of a coal preparation plant, so that the circulating water of the coal preparation plant can replace tap water as the water source for the automatic cleaning device of the pressurized filtration system to reduce operating costs. At the same time, the filtering device also has a self-cleaning function. Utility Model Content

[0003] The main purpose of the utility model is to provide a filtering device for filtering the circulating water of a coal preparation plant, so that the circulating water of the coal preparation plant can replace tap water as the water source of the automatic cleaning device of the pressurized filtering system to reduce the operating cost. At the same time, the filtering device also has a self-cleaning function. The utility model also provides a pressurized filtering system including the above-mentioned filtering device.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a filtering device in one embodiment, including: a working chamber, a liquid inlet pipe, a liquid outlet pipe, a cleaning pipe and a filtering assembly;

[0005] The filtering assembly is arranged in the working chamber, and divides the interior of the working chamber into a filtrate area and a raw liquid area arranged at intervals in the upper and lower parts;

[0006] The liquid outlet end of the liquid inlet pipe, the liquid inlet end of the liquid outlet pipe and the liquid outlet end of the cleaning pipe all extend into the working chamber, and the liquid outlet end of the liquid inlet pipe is located in the raw liquid area, the liquid inlet end of the liquid outlet pipe is located in the filtrate area, and the liquid outlet end of the cleaning pipe is located in the filtrate area and is arranged toward the filter assembly.

[0007] Furthermore, a vent is provided in the working chamber in the area of ​​the raw liquid zone.

[0008] Furthermore, the portion of the liquid inlet pipe located in the working chamber is vertically arranged and extends through the filter assembly into the raw liquid area, and the axis of the liquid inlet pipe coincides with the axis of the working chamber.

[0009] Furthermore, a plurality of cleaning pipes are provided, and all of the cleaning pipes are arranged around the axis of the working chamber.

[0010] Furthermore, it also includes a cleaning main line and a liquid separation component; the liquid separation component is arranged at the end of the cleaning main line, and the ends of all the cleaning pipes away from the working chamber are connected to the liquid separation component.

[0011] Furthermore, the working chamber includes a chamber body and a chamber cover; the chamber cover is connected to the chamber body, and the liquid inlet pipe, the liquid outlet pipe and the cleaning pipe are all fixedly arranged on the chamber cover.

[0012] Furthermore, a pressure sensor is provided on the liquid outlet pipe for monitoring pressure information in the liquid outlet pipe.

[0013] Furthermore, the cleaning pipe is provided with a first on-off valve for controlling its on-off, and the vent is provided with a second on-off valve for controlling its on-off;

[0014] The filtering device further includes a controller, which is electrically connected to the pressure sensor, the first on-off valve and the second on-off valve, and controls the on-off of the first on-off valve and the second on-off valve according to monitoring information of the pressure sensor.

[0015] Another embodiment of the present invention further provides a pressurized filtration system, comprising the filtration device described in any of the above embodiments.

[0016] Furthermore, the pressurized filtration system is arranged in a coal preparation plant, and the pressurized filtration system includes a pressurized filter and an automatic cleaning device for cleaning the pressurized filter; the liquid inlet end of the liquid inlet pipe is used to connect to the circulating water system of the coal preparation plant, and the liquid outlet end of the liquid outlet pipe is used to connect to the automatic cleaning device.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a filtering device, comprising: a working chamber, a liquid inlet pipe, a liquid outlet pipe, a cleaning pipe and a filtering assembly; the filtering assembly is arranged in the working chamber, and divides the interior of the working chamber into a filtrate area and a raw liquid area which are arranged at upper and lower intervals; the liquid outlet end of the liquid inlet pipe, the liquid inlet end of the liquid outlet pipe and the liquid outlet end of the cleaning pipe all extend into the working chamber, and the liquid outlet end of the liquid inlet pipe is located in the raw liquid area, the liquid inlet end of the liquid outlet pipe is located in the filtrate area, and the liquid outlet end of the cleaning pipe is located in the filtrate area and is arranged toward the filtering assembly.

[0019] By filtering impurities in the raw liquid to obtain the filtrate, it is convenient for downstream equipment to use. At the same time, a cleaning pipe is provided to automatically clean the filter assembly, which can avoid the filter device from being unable to be used normally due to clogging of the filter assembly. When the filter device in this embodiment is applied to the pressurized filtration system of a coal preparation plant, the circulating water of the coal preparation plant can be filtered, so that the circulating water can be transported to the automatic cleaning device of the pressurized filtration system, so that the circulating water can be used as a water source for the automatic cleaning device, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a filtering device provided in an embodiment of the utility model;

[0022] Figure 2 A schematic structural diagram of the filtering device provided in an embodiment of the utility model from another perspective.

[0023] Icons: 1-working chamber; 11-chamber body; 12-chamber cover; 13-vent; 14-second on-off valve; 15-raw liquid area; 16-filtrate area;

[0024] 2- Filter component;

[0025] 31 - liquid inlet pipe; 32 - liquid outlet pipe; 33 - cleaning pipe; 34 - main cleaning line; 35 - first on-off valve; 36 - pressure sensor; 37 - liquid separation component. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1 and Figure 2As shown, an embodiment of the utility model provides a filtering device, comprising: a working chamber 1, a liquid inlet pipe 31, a liquid outlet pipe 32, a cleaning pipe 33 and a filtering assembly 2; the filtering assembly 2 is arranged in the working chamber 1, and divides the interior of the working chamber 1 into a filtrate area 16 and a raw liquid area 15 which are arranged at an upper and lower interval; the liquid outlet end of the liquid inlet pipe 31, the liquid inlet end of the liquid outlet pipe 32 and the liquid outlet end of the cleaning pipe 33 all extend into the working chamber 1, and the liquid outlet end of the liquid inlet pipe 31 is located in the raw liquid area 15, the liquid inlet end of the liquid outlet pipe 32 is located in the filtrate area 16, and the liquid outlet end of the cleaning pipe 33 is located in the filtrate area 16 and is arranged toward the filtering assembly 2.

[0028] A filtering device provided in this embodiment includes: a working chamber 1, a liquid inlet pipe 31, a liquid outlet pipe 32, a cleaning pipe 33 and a filtering assembly 2. The working chamber 1 is a barrel-shaped structure, and its bottom is preferably a conical structure. The filtering assembly 2 is arranged in the working chamber 1. The shape of the filtering assembly 2 corresponds to the shape of the cross section of the chamber body 11. The outer edge of the filtering assembly 2 is connected to the inner wall of the working chamber 1, thereby dividing the interior of the working chamber 1 into a filtrate area 16 and a raw liquid area 15 that are arranged at intervals. The filtrate area 16 is located above the raw liquid area 15. The raw liquid in the raw liquid area 15 can enter the filtrate area 16 through the filtering assembly 2. When the raw liquid in the raw liquid area 15 passes through the filtering assembly 2, the filtering assembly 2 can filter out impurities in the raw liquid, thereby obtaining a filtrate; the liquid inlet end of the liquid inlet pipe 31 is connected to the liquid source, and the outlet end of the liquid inlet pipe 31 is connected to the liquid source. The liquid end extends into the working chamber 1 and is located in the raw liquid area 15, and is used to transport the raw liquid in the liquid source to the raw liquid area 15 of the working chamber 1; the liquid inlet end of the liquid outlet pipe 32 extends into the working chamber 1 and is located in the filtrate area 16, and the liquid outlet end is connected to the downstream equipment. When the filtrate area 16 is full of filtrate, the liquid outlet pipe 32 can transport the filtrate obtained after filtering the filter component 2 to the downstream equipment; the liquid outlet end of the cleaning pipe 33 extends into the working chamber 1, and is preferably located in the raw liquid area 15, and the liquid outlet end of the cleaning pipe 33 is arranged toward the filter component 2, which is used to flush the filter component 2 when the filter component 2 is blocked, so as to ensure that the filter device can operate normally.

[0029] The filtering device provided in this embodiment obtains filtrate by filtering impurities in the raw liquid, which can facilitate the use of downstream equipment. At the same time, a cleaning pipe 33 is provided to automatically clean the filter assembly 2, which can avoid the filter device from being unable to be used normally due to blockage of the filter assembly 2. When the filtering device in this embodiment is applied to the pressurized filtering system of a coal preparation plant, the circulating water of the coal preparation plant can be filtered, so that the circulating water can be transported to the automatic cleaning device of the pressurized filtering system, so that the circulating water can be used as a water source for the automatic cleaning device, thereby reducing production costs.

[0030] The filter device provided by the embodiment of the utility model is as follows Figure 1 As shown, a vent 13 is provided in the working chamber 1 in the area of ​​the raw liquid area 15 .

[0031] Preferably, in this embodiment, the working chamber 1 is provided with a drain port 13, which is used to drain the liquid in the working chamber 1 when the filter assembly 2 is cleaned through the cleaning pipe 33. The drain port 13 is located in the raw liquid area 15. Since the raw liquid area 15 and the filtrate area 16 are arranged up and down, the drain port 13 is specifically arranged on the bottom wall of the working chamber 1.

[0032] Furthermore, the filter device provided by the embodiment of the utility model is as follows: Figure 1 and Figure 2 As shown, the portion of the liquid inlet pipe 31 located in the working chamber 1 is vertically arranged and passes through the filter assembly 2 and extends into the raw liquid area 15, and the axis of the liquid inlet pipe 31 coincides with the axis of the working chamber 1.

[0033] In this embodiment, a through hole is provided on the filter assembly 2, and the liquid inlet pipe 31 is vertically arranged in the part located in the working chamber 1, and sequentially passes through the filtered liquid area 16 and the through hole on the filter assembly 2 and extends into the raw liquid area 15, and the axis of the liquid inlet pipe 31 coincides with the axis of the working chamber 1. Since the raw liquid has a certain pressure when entering the raw liquid area 15 through the liquid inlet pipe 31, the liquid inlet pipe 31 adopts the above-mentioned arrangement mode, which can prevent the raw liquid from precipitating in the raw liquid area 15 under pressure shock, thereby preventing the venting port 13 from being blocked due to excessive precipitation, affecting the normal use of the venting port 13.

[0034] The filter device provided by the embodiment of the utility model is as follows Figure 1 and Figure 2 As shown, a plurality of cleaning pipes 33 are provided, and all cleaning pipes 33 are arranged around the axis of the working chamber 1 .

[0035] Preferably, in this embodiment, a plurality of cleaning pipes 33 are provided to improve the cleaning effect on the filter assembly, and all cleaning pipes 33 are arranged around the axis of the working chamber 1 so that all cleaning pipes 33 can cover the filter assembly 2.

[0036] The filter device provided by the embodiment of the utility model is as follows Figure 1 and Figure 2 As shown, it also includes a cleaning main line 34 and a liquid separation component 37; the liquid separation component 37 is arranged at the end of the cleaning main line 34, and the ends of all cleaning pipes 33 away from the working chamber 1 are connected to the liquid separation component 37.

[0037] In this embodiment, in order to improve the integrity of the filter device, the filter device further includes a cleaning main line 34 and a liquid separation component 37. One end of the cleaning main line 34 is connected to a cleaning liquid source for cleaning the filter assembly 2. The cleaning liquid source can be a tap water system in the factory. The other end of the cleaning main line 34 is provided with a liquid separation component 37. The end of each cleaning pipe 33 away from the working chamber 1 is provided on the liquid separation component 37. The cleaning liquid of the cleaning liquid source is supplied to each cleaning pipe 33 through the cleaning main line 34 and the liquid separation component 37. Optionally, the above-mentioned liquid separation component 37 can be a multi-way joint corresponding to the number of cleaning pipes 33, or a liquid separation pipe with multiple liquid outlets.

[0038] The filter device provided by the embodiment of the utility model is as follows Figure 1 and Figure 2 As shown, the working chamber 1 includes a chamber body 11 and a chamber cover 12 ; the chamber cover 12 is connected to the chamber body 11 , and a liquid inlet pipe 31 , a liquid outlet pipe 32 and a cleaning pipe 33 are all fixedly arranged on the chamber cover 12 .

[0039] In this embodiment, the working chamber 1 comprises a chamber body 11 and a chamber cover 12. The chamber body 11 is a barrel-shaped structure, the upper end of the chamber body 11 is open, the lower end is conical, and the lower end is provided with the above-mentioned venting port 13; the chamber cover 12 is connected to the chamber body 11 and is used to open or close the open end of the chamber body 11. The above-mentioned liquid inlet pipe 31, liquid outlet pipe 32 and cleaning pipe 33 are all fixedly arranged on the chamber cover 12. That is, the liquid inlet pipe 31 passes through the through holes of the chamber cover 12, the filtrate area 16 and the filter assembly 2 in sequence and extends into the raw liquid area 15.

[0040] The filter device provided by the embodiment of the utility model is as follows Figure 1 and Figure 2 As shown, a pressure sensor 36 is provided on the liquid outlet pipe 32 for monitoring the pressure information in the liquid outlet pipe 32 .

[0041] Preferably, in this embodiment, a pressure sensor 36 for monitoring the pressure information in the liquid outlet pipe 32 is provided on the liquid outlet pipe 32. During use, when the pressure sensor 36 detects that the pressure in the liquid outlet pipe 32 is lower than a preset value, it indicates that the filter component 2 is clogged, and the filter component 2 needs to be cleaned.

[0042] In this embodiment, a first on-off valve 35 is provided in the cleaning pipe 33 to control the on-off of the cleaning pipe 33. Preferably, the first on-off valve 35 is provided on the main cleaning line 34 for easy operation; a second on-off valve 14 is provided at the vent 13 to control the on-off of the vent 13. When the pressure sensor 36 detects that the pressure in the liquid outlet pipe 32 is lower than the preset value, the liquid inlet pipe 31 stops feeding liquid, and the operator can open the second on-off valve 14 to allow the vent 13 to discharge the liquid in the working chamber 1, and at the same time open the first on-off valve 35 to allow each cleaning pipe 33 to spray cleaning liquid to flush the filter assembly 2; after a certain period of cleaning, the first on-off valve 35 and the second on-off valve 14 are closed, and the liquid inlet pipe 31 is fed with liquid again.

[0043] Optionally, in the filter device provided by the embodiment of the utility model, the above-mentioned flushing of the filter assembly 2 can also be automatically controlled by a controller. Specifically, the filter device also includes a controller, which is electrically connected to the pressure sensor 36, the first on-off valve 35 and the second on-off valve 14, and the controller controls the on-off of the first on-off valve 35 and the second on-off valve 14 according to the monitoring information of the pressure sensor 36.

[0044] In this embodiment, the above-mentioned filtering device is also configured with a controller, which can receive pressure sensor monitoring information. The above-mentioned first on-off valve 35 and the second on-off valve 14 are both electrically controlled valves. When the pressure sensor 36 detects that the pressure in the liquid outlet pipe 32 is lower than the preset value, the controller controls the first on-off valve 35 and the second on-off valve 14 to open, so that the vent 13 can discharge the liquid in the working chamber 1, and each cleaning pipe 33 can spray cleaning liquid to flush the filter component 2, so that the filter component 2 can be automatically cleaned.

[0045] Optionally, in this embodiment, the above-mentioned controller can be a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0046] Optionally, in this embodiment, the filter assembly 2 may adopt a multi-layer filter screen, such as a stainless steel filter screen, or a multi-layer folded filter element or a sintered metal filter element and the like, and the specific selection may be made according to actual usage.

[0047] Another embodiment of the present invention further provides a pressurized filtration system, comprising the filtration device described in any of the above embodiments.

[0048] The above-mentioned pressurized filtration system also includes a pressurized filter and an automatic cleaning device that cooperates with the pressurized filter; wherein the pressurized filter is provided with a filter cloth for intercepting solid particles in the suspension under pressurized conditions so that the liquid can be discharged through the filter cloth, and the filter cloth can be made of synthetic fibers, such as PET (Polyethylene terephthalate), PP (Polypropylene) or PA (Polyamide), etc., or natural fibers or metal mesh, etc. After the filter cloth has been used for a certain period of time, it is cleaned by an automatic cleaning device to ensure that the filter cloth can operate efficiently and extend its service life, and to ensure good permeability of the filter cloth, and the automatic cleaning device can reduce the amount of manual maintenance. In this embodiment, the water in the water source is filtered by the above-mentioned flushing device and then transported to the automatic cleaning device for flushing the filter cloth.

[0049] Optionally, in this embodiment, the above-mentioned pressurized filtration system is arranged in a coal preparation plant, and is used to filter and separate solid particles from the suspension in the coal preparation plant. The coal preparation plant has a circulating water system, and the liquid inlet end of the liquid inlet pipe 31 of the above-mentioned filtration device is connected to the circulating water system of the coal preparation plant, and the liquid outlet end of the liquid outlet pipe 32 of the above-mentioned filtration device is connected to the automatic cleaning device of the pressurized filtration system, so as to realize the use of the circulating water in the circulating water system of the coal preparation plant as the water source of the automatic cleaning device of the pressurized filtration system, and realize the cleaning of the filter cloth of the pressurized filter of the pressurized filtration system.

[0050] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A filtering device, characterized in that: include: A working chamber (1), a liquid inlet pipe (31), a liquid outlet pipe (32), a cleaning pipe (33) and a filter assembly (2); The filtering component (2) is arranged in the working chamber (1), and divides the interior of the working chamber (1) into a filtrate area (16) and a raw liquid area (15) which are arranged at intervals in the upper and lower parts; The liquid outlet end of the liquid inlet pipe (31), the liquid inlet end of the liquid outlet pipe (32) and the liquid outlet end of the cleaning pipe (33) all extend into the working chamber (1), and the liquid outlet end of the liquid inlet pipe (31) is located in the raw liquid area (15), the liquid inlet end of the liquid outlet pipe (32) is located in the filtrate area (16), and the liquid outlet end of the cleaning pipe (33) is located in the filtrate area (16) and is arranged toward the filter assembly (2).

2. The filtering device according to claim 1, characterized in that: The working chamber (1) is provided with a drain port (13) in an area located in the raw liquid area (15).

3. The filtering device according to claim 2, characterized in that: The portion of the liquid inlet pipe (31) located in the working chamber (1) is arranged vertically and passes through the filter assembly (2) and extends into the raw liquid area (15), and the axis of the liquid inlet pipe (31) coincides with the axis of the working chamber (1).

4. The filtering device according to claim 1, characterized in that: A plurality of cleaning pipes (33) are provided, and all of the cleaning pipes (33) are arranged around the axis of the working chamber (1).

5. The filtering device according to claim 4, characterized in that: It also comprises a main cleaning line (34) and a liquid separation component (37); the liquid separation component (37) is arranged at the end of the main cleaning line (34), and the ends of all the cleaning pipes (33) away from the working chamber (1) are connected to the liquid separation component (37).

6. The filtering device according to claim 1, characterized in that: The working chamber (1) comprises a chamber body (11) and a chamber cover (12); the chamber cover (12) is connected to the chamber body (11), and the liquid inlet pipe (31), the liquid outlet pipe (32) and the cleaning pipe (33) are all fixedly arranged on the chamber cover (12).

7. The filtering device according to claim 2, characterized in that: The liquid outlet pipe (32) is provided with a pressure sensor (36) for monitoring pressure information in the liquid outlet pipe (32).

8. The filtering device according to claim 7, characterized in that: The cleaning pipe (33) is provided with a first on-off valve (35) for controlling its on-off, and the venting port (13) is provided with a second on-off valve (14) for controlling its on-off; The filtering device further comprises a controller, the controller being electrically connected to the pressure sensor (36), the first on-off valve (35) and the second on-off valve (14), the controller controlling the on-off of the first on-off valve (35) and the second on-off valve (14) according to monitoring information of the pressure sensor (36).

9. A pressurized filtration system, characterized in that: The filter comprises the filter device according to any one of claims 1 to 8.

10. The pressurized filtration system according to claim 9, characterized in that: The pressurized filtration system is arranged in a coal preparation plant, and comprises a pressurized filter and an automatic cleaning device for cleaning the pressurized filter; the liquid inlet end of the liquid inlet pipe (31) is used for connecting to the circulating water system of the coal preparation plant, and the liquid outlet end of the liquid outlet pipe (32) is used for connecting to the automatic cleaning device.

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