Efficient particle membrane filtration process

Abstract

The invention discloses a high-efficiency particle membrane filtration process, which combines a column type filtration assembly and a particle adsorption technology, and realizes high-precision filtration by arranging and combining a plurality of particle membrane high-speed filters to construct a skid type structure. The particle membrane high-speed filter comprises a column type filter assembly, a water inlet multi-way valve and a water production multi-way valve, a valve, a pipeline, an instrument and an electric control system are further arranged in the skid, the assemblies in the skid are grouped according to the process sequence of operation, waiting, backwashing and commissioning, and the grouping modes comprise the process operation modes of single assembly, multiple assembly and grouping. The problems that a conventional filter is large in backwashing water amount, prone to being polluted and blocked and long in flow are solved, high-flow-speed, high-precision and high-stability filtering can be achieved, large-flux incoming water can be treated, and use of filter materials is reduced; a column type skid structure is adopted, the occupied area of the filter is greatly reduced, the technological process is shortened, flexible and free permutation and combination are achieved, various complex water qualities can be dealt with, and the requirement for the inlet water quality is relatively wide.

Description

Technical Field

[0001] The invention relates to the technical field of filtration processing, and in particular to a high-efficiency particle membrane filtration process. Background Art

[0002] Multi-media filtration technology, quartz sand filtration technology and ultrafiltration technology are widely used in industries such as petroleum, chemical industry, energy and water treatment. Traditional multi-media filtration technology and quartz sand filtration technology mostly adopt a tank-type appearance structure, which has problems such as high requirements for influent turbidity, low pollution holding capacity, low flow rate, large footprint, many auxiliary equipment, and large backwash water volume. Ultrafiltration technology also has similar problems: high requirements for influent water quality, generally influent turbidity is no more than 10NTU, a filter is required at the front end, and a water production tank is required at the back end; the equipment has a small filtration flux, a small pollution holding capacity, and the equipment filtration process is complex and occupies a large area. Summary of the invention

[0003] The purpose of the present invention is to provide a high-efficiency particle membrane filtration process, which is the first commercial application of particle filtration technology to construct a columnar structure. It can solve the problems of low flow rate, easy fouling and clogging, low filtration accuracy, large footprint, high operating cost, and the need for adding drugs in conventional filtration technology. The requirements for inlet water quality are relatively broad, and it can handle various types of water quality without stopping for cleaning, thereby improving production efficiency.

[0004] To achieve the above-mentioned purpose, the present application proposes a high-efficiency particle membrane filtration process, which adopts a column filter assembly combined with a particle adsorption technology to achieve high-efficiency filtration; and a skid-type structure is constructed by arranging and combining multiple particle membrane high-speed filters, the skid structure also includes valves, valves, pipelines, instruments, and an electronic control system. The skid structure achieves high-precision and high-flow rate filtration through a sequential backwashing process;

[0005] The particle membrane high-speed filter includes a column filter assembly, a water inlet multi-way valve, and a water production multi-way valve;

[0006] The components in the skid structure are grouped according to the process sequence of operation, waiting, backwashing and commissioning, and the grouping method includes but is not limited to single, multiple and grouped process operation methods.

[0007] In one embodiment, the operating condition is to input raw water with a turbidity of 50-500 NTU into multiple particle membrane high-speed filters for treatment;

[0008] The backwashing condition is to input the backwashing water into a plurality of particle membrane high-speed filters for backwashing.

[0009] In one embodiment, a corresponding number of particle membrane high-speed filters can be selected according to the processing volume.

[0010] In one embodiment, the column filter assembly adopts a water intake method from bottom to top, specifically including:

[0011] The columnar shell is filled with granular adsorbents. The charging characteristics are used to construct a precision filter membrane. The adsorption membrane is formed under the action of the membrane aid to achieve high-precision filtration of water. The shell material includes but is not limited to one or more materials such as carbon steel, stainless steel, CPVC, and UPVC;

[0012] An upper end plate, located on the top of the columnar shell;

[0013] The water collection component is installed on the column housing to ensure the stable operation of the filter material and the stable operation of the water flow rate at 15-60m / h;

[0014] The lower end plate is located at the bottom of the columnar shell.

[0015] In one embodiment, the adsorbent includes one or a combination of walnut kernels, anthracite, quartz sand, garnet, fluorite, organic particles, PVC particles, PP particles, slag, etc.

[0016] In one embodiment, the water collection component comprises:

[0017] Water collector, one or more combinations of cylinder, counterweight, and water top pressure;

[0018] The water distribution head is connected to the water collector to evenly distribute the water flow and adjust the water pressure.

[0019] In one embodiment, the adsorbent particles have a particle size of 0.3-1.5 mm, 0.5-1.65 mm, and 0.8-2.2 mm.

[0020] In one embodiment, the water inlet multi-way valve includes a raw water inlet, a backwash inlet and a compressed air inlet; the water production multi-way valve includes a raw water outlet, a backwash outlet and a compressed air outlet.

[0021] In one of the embodiments, the raw water delivery pipeline, the backwash water inlet pipeline, the compressed air delivery pipeline, the produced water pipeline, the backwash drainage pipeline and the compressed air output pipeline are all provided with mounting flanges.

[0022] In one embodiment, the column filter assembly has a diameter of 200 to 500 mm and a height of 1500 to 3500 mm.

[0023] By adopting the above technical scheme, the present invention solves the pain points of conventional filters such as large backwash water volume, easy fouling and clogging, and long process, and can achieve high-flow rate, high-precision, and high-stability filtration, and can process large-flux water, reduce the use of filter materials, and use less backwash water; by combining particle filtration technology with a columnar structure, the filter footprint is reduced, the process flow is shortened, and flexible and free arrangements and combinations are achieved, which can cope with a variety of complex water qualities and have relatively broad requirements for inlet water quality; the system is switched by a multi-way valve to achieve different filtration processes, which greatly improves the utilization efficiency of the company's production space, effectively reduces production costs, and plays a positive role in promoting the development of the company and the entire industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the principle diagram of the high-efficiency particle membrane filtration process;

[0025] Figure 2 This is a schematic diagram of the skid structure of multiple groups of particle membrane high-speed filters;

[0026] Figure 3 This is a schematic diagram of the interior of a particle membrane high-speed filter;

[0027] Figure 4 This is the schematic diagram of the particle membrane high-speed filter;

[0028] Figure 5 It is the principle diagram of water inlet multi-way valve and water production multi-way valve;

[0029] Figure 6 This is a process flow chart of Example 1;

[0030] Figure 7 This is a process flow chart of Example 2;

[0031] Figure 8 This is the process flow chart involved in real-time example 3.

[0032] Among them: 1. Upper end plate; 2. Column shell; 3. Water distributor; 4. Lower end plate; 5. Water collection assembly; 51. Cylinder; 52. Water collector; 53. Water distribution head; 6. Working area; 71. Compressed air delivery pipeline; 72. Backwash water inlet pipeline; 73. Raw water delivery pipeline; 74. Water inlet multi-way valve; 75. Water production multi-way valve; 76. Water production pipeline; 77. Backwash drainage pipeline; 78. Compressed air output pipeline. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0036] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] See also Figure 1-2 This embodiment provides a high-efficiency particle membrane filtration process, which can effectively remove colloids, suspended matter, and turbidity in incoming water, and can replace traditional multi-media filter devices, V-type filter tanks, siphon filter tanks, quartz sand filters, and ultrafiltration membranes, etc., specifically including:

[0039] According to the processing capacity, multiple particle membrane high-speed filters are arranged and combined in groups. The number of particle membrane high-speed filters in each group is not fixed, and the groups are connected with a skid-type structure; each particle membrane high-speed filter is equipped with an inlet multi-way valve and a water production multi-way valve; through the switching of the inlet multi-way valve and the water production multi-way valve, the different operating conditions of each filter, "operation" or "backwashing", are realized;

[0040] The raw water delivery pipeline is connected to the water inlet multi-way valve and is used to input raw water with a turbidity of 50-500NTU into the particle membrane high-speed filter;

[0041] The backwash water inlet pipeline is connected to the water inlet multi-way valve, and raw water can be used for flushing under backwash conditions;

[0042] The compressed air delivery pipeline is connected to the water inlet multi-way valve and is used to provide pressure when backwashing the particle membrane high-speed filter;

[0043] The produced water pipeline is connected to the produced water multi-way valve and is used to transport the produced water treated by the particle membrane high-speed filter;

[0044] The backwash drainage pipeline is connected to the water production multi-way valve and is used for drainage after backwashing of the particle membrane high-speed filter;

[0045] The compressed air output pipeline is connected to the water production multi-way valve and is used to discharge compressed air after backwashing of the particle membrane high-speed filter.

[0046] As a preferred implementation mode provided in this embodiment, only the filter in the backwashing condition is backwashed each time, which greatly reduces the amount of backwash water.

[0047] As a preferred implementation mode provided in this embodiment, a corresponding number of particle membrane high-speed filters are selected to operate according to the processing volume. Since a columnar structure is adopted to connect in the form of a skid, the floor space of the equipment is greatly reduced.

[0048] As a preferred implementation provided by this embodiment, the particle membrane high-speed filter has a diameter of 200-500 mm and a height of 1500-3500 mm. Compared with the traditional canister filter, it has the advantages of small volume, high flow rate, large water production, and less filter material consumption.

[0049] like Figure 3-4 As shown, the particle membrane high-speed filter adopts a water intake method from bottom to top, specifically including:

[0050] The columnar shell is filled with granular adsorbents, and the charging characteristics are used to construct a precision filter membrane. Under the action of the membrane aid, an adsorption membrane is formed to achieve high-precision filtration of water. The shell material includes but is not limited to one or more materials of carbon steel, stainless steel, CPVC, and UPVC; the adsorbent includes one or more combinations of walnut kernels, anthracite, quartz sand, garnet, fluorite, organic particles, PVC particles, PP particles, slag, etc.;

[0051] An upper end plate is pressed onto the end of the columnar housing through a first sealing ring and fixed through a first clamp, and a water outlet is embedded on the upper end plate;

[0052] The water collection component is a moving component installed on the columnar housing; it is used to provide pressure so that the water flow speed inside the columnar housing can run stably at 15-60m / h;

[0053] The lower end plate is pressed on the end of the columnar housing through the second sealing ring and fixed by the second clamp. An external tooth water distributor is connected to the lower end plate. Raw water enters the columnar housing from all sides of the external tooth water distributor to achieve uniform water distribution.

[0054] The water distributor is located between the adsorbent and the lower end plate, and the water distributor is a sieve plate with different apertures.

[0055] As a preferred implementation provided in this embodiment, the water collection component includes but is not limited to:

[0056] A water collector, in combination with one or more of a cylinder, a counterweight, and a water top pressure; the water collector can guide the backwash water flow through the filter layer to flush out the impurities and particles trapped therein;

[0057] The water distribution head is connected to the water collector to evenly distribute the water flow and adjust the water pressure.

[0058] As a preferred implementation mode provided in this embodiment, the inner part of the columnar shell is divided into an expansion area and a working area, the expansion area is the movement area of ​​the water collection component, and the working area is the adsorbent addition area; during backwashing, an interactive cleaning method of the expansion area and the working area is adopted.

[0059] Example 1

[0060] The raw water is high-turbidity river water, with an inlet turbidity of 125NTU. The original process pretreatment adopts the process flow of "multi-media filtration + ultrafiltration", and the turbidity of the produced water is ≤4NTU. After the particle membrane filtration process of the present invention is improved, the equipment is optimized to a particle membrane filtration device composed of several particle membrane high-speed filtration components in a skid-type structure. The raw water is directly sent to the particle membrane high-speed filtration device. After removing turbidity, colloids, and suspended solids, the turbidity of the produced water is less than 0.3NTU and sent to the precision filter. The produced water is then sent to the reverse osmosis device. The reverse osmosis fresh water is desalted water and can be used as production water; the concentrated water is highly concentrated brine, which can be used as wastewater for flushing the particle membrane high-speed filter. The wastewater filtered by the particle membrane high-speed filter is high-turbidity wastewater and discharged into the wastewater system. After this process improvement, the problems of long original process, easy fouling and clogging of the membrane, and large backwashing water volume can be effectively reduced, and high-flow rate, high-precision, and high-stability filtration can be achieved.

[0061] Example 2

[0062] The raw water is salty, high-turbidity, and high-hardness wastewater, with an inlet turbidity of 148NTU, a salt content of 3500mg / L, and a hardness of 751mg / L. The original process pretreatment adopts the process flow of "coagulation + sedimentation + rapid filter + multi-media", and the turbidity of the original water is less than 5NTU. After the particle membrane filtration process of the present invention is improved, the equipment is optimized to a particle membrane filtration device composed of several particle membrane high-speed filtration components in a skid-type structure. The process is changed to directly send the raw water into the particle membrane high-speed filtration device. After removing the turbidity, colloid, and suspended matter in the water, the turbidity of the produced water is ≤0.5NTU, and enters the hardness removal device. The water produced by the hardness removal device is hardness-free water, which is sent to a multi-stage reverse osmosis unit. The reverse osmosis fresh water is desalted water, which is used as production water, and the concentrated water is used as wastewater for flushing the particle membrane high-speed filter. After this process improvement, the original process flow can be shortened, the water pump lifting equipment in the original process can be omitted, energy can be saved, and floor space can be saved.

[0063] Example 3

[0064] The raw water of a chemical plant is discharged from a desalting water station. The water quality is high-turbidity saline wastewater, with an inlet turbidity of 210NTU and a salt content of 1200mg / L. The original process pretreatment adopts the "high-density pool + filter pool + multi-media + ultrafiltration" process, and the turbidity of the produced water is ≤1. After the particle membrane filtration process of the present invention is improved, the equipment is optimized to a particle membrane filtration device composed of several particle membrane high-speed filtration components in a skid-type structure. The process is changed to directly send the raw water into the particle membrane high-speed filtration device. After removing the turbidity, colloid and suspended matter in the water, the turbidity of the produced water is ≤0.2NTU and sent to the multi-stage reverse osmosis unit. The reverse osmosis fresh water is desalted water and used as production water; the concentrated water is used as wastewater for flushing the particle membrane high-speed filter. After this process improvement, the original process flow can be shortened, the water pump lifting equipment in the original process can be omitted, energy can be saved, and the floor space can be saved. .

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-efficiency particle membrane filtration process, characterized in that: High-efficiency filtration is achieved by combining column filter components with particle adsorption technology; and a skid-type structure is constructed by arranging and combining multiple particle membrane high-speed filters. The skid structure also includes valves, valves, pipelines, instruments, and electronic control systems. The skid structure achieves high-precision and high-flow rate filtration through a sequential backwashing process; The particle membrane high-speed filter includes a column filter assembly, a water inlet multi-way valve, and a water production multi-way valve; The components in the skid structure are grouped according to the process sequence of operation, waiting, backwashing and commissioning, and the grouping methods include single-branch, multi-branch and grouped process operation modes.

2. A high-efficiency particle membrane filtration process according to claim 1, characterized in that: The operating condition is to input raw water with a turbidity of 50-500NTU into multiple particle membrane high-speed filters for treatment; The backwashing condition is to input the backwashing water into a plurality of particle membrane high-speed filters for backwashing.

3. A high-efficiency particle membrane filtration process according to claim 1, characterized in that: According to the processing volume, select the corresponding number of particle membrane high-speed filters.

4. A high-efficiency particle membrane filtration process according to claim 1, characterized in that: The column filter assembly adopts a water intake method from bottom to top, specifically including: The columnar shell is filled with granular adsorbents. The charging characteristics are used to construct a precision filter membrane. Under the action of the membrane aid, an adsorption membrane is formed to achieve high-precision filtration of water. An upper end plate, located on top of the columnar shell; The water collection component is installed on the column housing to ensure the stable operation of the filter material and the stable operation of the water flow rate at 15-60m / h; The lower end plate is located at the bottom of the columnar shell to achieve uniform water distribution.

5. A high-efficiency particle membrane filtration process according to claim 4, characterized in that: The adsorbent includes one or a combination of walnut kernels, anthracite, quartz sand, garnet, fluorite, organic particles, PVC particles, PP particles, slag, etc.

6. A high-efficiency particle membrane filtration process according to claim 4, characterized in that: The water collection assembly comprises: Water collector, one or more combinations of cylinder, counterweight, and water top pressure; The water distribution head is connected to the water collector to evenly distribute the water flow and adjust the water pressure.

7. A high-efficiency particle membrane filtration process according to claim 4, characterized in that: The adsorbent particles have a particle size of 0.3-1.5 mm, 0.5-1.65 mm, and 0.8-2.2 mm.

8. A high-efficiency particle membrane filtration process according to claim 1, characterized in that: The water inlet multi-way valve comprises a raw water inlet, a backwash inlet and a compressed air inlet; the water production multi-way valve comprises a raw water outlet, a backwash outlet and a compressed air outlet.

9. A high-efficiency particle membrane filtration process according to claim 1, characterized in that: The raw water delivery pipeline, backwash water inlet pipeline, compressed air delivery pipeline, produced water pipeline, backwash drainage pipeline and compressed air output pipeline are all provided with mounting flanges.

10. A high-efficiency particle membrane filtration process according to claim 4, characterized in that: The column filter assembly has a diameter of 200 to 500 mm and a height of 1500 to 3500 mm.

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