Particle membrane high-speed filter assembly and engineering application

Abstract

The invention discloses a particle membrane high-speed filtering assembly and engineering application. Commercialization application of a column type structure constructed by a particle filtering technology is proposed for the first time. The assembly adopts a bottom-to-top water inlet mode, and specifically comprises a column type shell, the shell is filled with a granular adsorbent, a precision filter membrane is constructed by utilizing charge characteristics, an adsorption membrane is formed under the action of a membrane aid, and high-precision filtration of water is realized; the upper end plate is located at the top of the column type shell; the water collecting assembly is a moving assembly, is mounted on the column type shell and consists of an air cylinder and a water collector; and the lower end plate is positioned at the bottom of the column type shell. The adsorbent comprises one or a combination of several of walnut kernels, anthracite, quartz sand, garnet, fluorite and the like. The interior of the column type shell is divided into an expansion area and a working area, and an interactive cleaning mode of the expansion area and the working area is adopted during backwashing. Due to the adoption of a column type structure, the particle membrane high-speed filtering assembly has the characteristics of low requirement on water inlet turbidity, high flow speed, uniform water distribution and the like.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a particle membrane high-speed filtration component and engineering application thereof. Background Art

[0002] Traditional multi-media filter technologies include canister filters, high-density sedimentation tanks, siphon filters, and V-shaped filters, but each of these technologies has its own limitations. Specifically, canister filters face many problems, such as slow filtration rate, easy formation of compaction, large backwash water consumption, limited pollution holding capacity, insufficient water production, difficult maintenance and repair (especially in confined spaces, there are safety hazards), and uneven water distribution; while high-density sedimentation tanks, siphon filters, and V-shaped filters generally have large floor space, limited water flow speeds, generally less than 10m / h, and also require a large amount of backwash water, a large number of supporting equipment, easy compaction, uneven water distribution, strict requirements on inlet turbidity, significant head loss, easy fouling and compaction, and relatively short operating cycles.

[0003] In addition, although ultrafiltration technology is highly efficient, its application is also accompanied by a series of difficulties: it requires extremely high influent water quality, and usually the turbidity needs to be controlled below 10NTU, which means that the front end must be equipped with a filter and the back end must be equipped with a water production tank; at the same time, the ultrafiltration membrane has a small flux, limited pollution holding capacity, cannot withstand back pressure, and the overall footprint is large, all of which limit its application flexibility in certain occasions. Summary of the invention

[0004] The purpose of the present invention is to provide a particle membrane high-speed filtration component and engineering application, which can solve the problems of low flow rate, easy fouling and clogging, low filtration accuracy, large footprint, high operating cost, and need for adding drugs in conventional filtration technology. It adopts a columnar component structure and has the characteristics of large pollution holding capacity, high flow rate, uniform water distribution, and easy maintenance and repair.

[0005] To achieve the above purpose, the present invention is: a particle membrane high-speed filtration component, which adopts a columnar structure, filler adsorption and auxiliary membrane forming process for the first time, and the operating process is a water intake method from bottom to top, specifically including:

[0006] 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;

[0007] An upper end plate, located on top of the columnar shell;

[0008] 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;

[0009] The lower end plate is located at the bottom of the columnar shell to achieve uniform water distribution.

[0010] 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.

[0011] In one embodiment, the water collection assembly comprises:

[0012] Water collector, one or more combinations of cylinder, counterweight, and water top pressure;

[0013] The water distribution head is connected to the water collector to evenly distribute the water flow and adjust the water pressure.

[0014] In one of the embodiments, a water distributor is further included, which is a sieve plate with different pore sizes and is located between the adsorbent and the lower end plate.

[0015] In one of the embodiments, 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 alternating cleaning method of the expansion area and the working area is adopted.

[0016] 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.

[0017] In one of the embodiments, the upper end plate is pressed onto the end of the columnar shell through a first sealing ring, and a water outlet is embedded on the upper end plate.

[0018] In one of the embodiments, the lower end plate is pressed against the end of the columnar shell by a second sealing ring, and an external water distributor is connected to the lower end plate. Raw water enters the columnar shell from all sides of the external water distributor to achieve uniform water distribution.

[0019] The particle membrane high-speed filtration component has a diameter of 200 to 500 mm and a height of 1500 to 3500 mm.

[0020] A plurality of the above-mentioned particle membrane high-speed filtration components form a particle membrane high-speed filtration device, which is used in water treatment.

[0021] The present invention proposes for the first time the commercial application of a columnar structure constructed by particle filtration technology. By adopting the above technical solution, the following technical effects can be achieved:

[0022] 1. Compared with multi-media filters, it has a compact column structure, which significantly reduces the floor space and makes the supporting equipment more compact. Its design features include uniform water distribution, high flow rate, high throughput and easy maintenance, low turbidity requirements for inlet water, and no need for sedimentation tanks, providing users with efficient and reliable filtration solutions.

[0023] 2. Compared with ultrafiltration equipment, it has the advantages of higher pollution holding capacity and easy cleaning and maintenance. By adopting the "reverse particle size filtration" method, the amount of water required in the backwashing process is greatly reduced, effectively solving the problems of small pollution holding capacity, easy fouling and low flux of traditional ultrafiltration equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the structure of a particle membrane high-speed filtration component;

[0026] Figure 2 This is the schematic diagram of the particle membrane high-speed filtration component;

[0027] Figure 3 This is a schematic diagram of the skid structure of the particle membrane high-speed filtration device;

[0028] Figure 4 This is a process flow chart of Example 3;

[0029] Figure 5 This is a process flow chart of Example 4;

[0030] Explanation of the serial numbers in the figure: 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. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. 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.

[0034] 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.

[0035] 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.

[0036] Example 1

[0037] See also Figure 1-2 This embodiment provides a particle membrane high-speed filtration component, which adopts a water intake method from bottom to top, specifically including:

[0038] 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 of carbon steel, stainless steel, CPVC, and UPVC;

[0039] 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;

[0040] The water collection component is a moving component installed on the columnar housing; it is used to collect water and increase resistance so that the water flow speed inside the columnar housing is 15-60m / h;

[0041] The lower end plate is pressed on the end of the columnar housing through the second sealing ring and fixed by the second clamp. The lower end plate is connected with an external water distributor. The raw water enters the columnar housing from the surroundings of the external water distributor to achieve uniform water distribution.

[0042] The water distributor is located between the adsorbent and the lower end plate, and the water distributor is a sieve plate with different apertures.

[0043] As a preferred implementation provided in this embodiment, the water collection assembly includes:

[0044] A water collector, connected to the cylinder, is located inside the column housing;

[0045] A cylinder, located at the top of the column housing, is used to move the water collector up and down;

[0046] The water distribution head is connected to the water collector to evenly distribute the water flow and adjust the water pressure;

[0047] The component diameter is 200-500mm and the height is 1500-3500mm.

[0048] 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 alternating cleaning method of the expansion area and the working area is adopted.

[0049] Example 2

[0050] like Figure 3 As shown, the particle membrane high-speed filtration components described in Example 1 are combined to form a particle membrane high-speed filtration device. The number of particle membrane high-speed filtration components to be used is calculated based on the processing volume, and a skid-type grouping arrangement can be adopted. Each particle membrane high-speed filtration component is equipped with an inlet multi-way valve and an outlet multi-way valve, and supporting pipelines, instruments, electrical, and automatic control systems. The system is equipped with operating conditions and backwashing conditions, thereby achieving the purposes of high-speed filtration, high precision, high stability, and pollution resistance, shortening the process flow, and solving the pain points of conventional filters such as large backwash water volume, easy fouling and clogging, and long process flow.

[0051] Example 3

[0052] like Figure 4As shown, the particle membrane high-speed filtration device described in Example 2 is applied in water treatment, specifically: production wastewater of a coal chemical enterprise, with an inlet flow rate of 195t / h, hardness of 1850mg / L, salt content of 2500mg / L, COD740mg / L, ammonia nitrogen of 360mg / L, suspended solids content of 155mg / L, and turbidity of 125NTU;

[0053] S1. The turbidity removal process of the salt-containing wastewater is achieved by the particle membrane high-speed filtration assembly described in Example 1, which is about 72 in number and arranged symmetrically, and operates in sequential backwashing.

[0054] S2. The particle membrane high-speed filter assembly is filled with adsorbent. The adsorbent filling volume of each particle membrane high-speed filter assembly is 750-1100mm high. A multi-level adsorbent mixed with heavy and light materials is used. For example, one is walnut kernel or anthracite with a particle size of 0.3-1.5mm. The other is garnet or fluorite with a particle size of 0.9-2.2mm. The water inlet flow rate is 38m / h, and the water output of each column is about 1.8m 3 / h. The backwash water volume is about 5m 3 / h, backwash time 5min.

[0055] S3. After the production wastewater passes through the particle membrane high-speed filtration component, the suspended matter and turbidity in the water are removed; the turbidity of the produced water is 2.1NTU.

[0056] Example 4

[0057] like Figure 5 As shown, the particle membrane high-speed filtration device described in Example 2 is applied in water treatment, specifically: alkaline production wastewater from a coal chemical enterprise, with a flow rate of 120 t / h, hardness of 580 mg / L, COD of 360 mg / L, PH = 11.8, suspended matter content of 85 mg / L, turbidity of 108 NTU, and SDI of 7.6.

[0058] S1. The alkaline wastewater turbidity removal process is achieved by the particle membrane high-speed filtration assembly described in Example 1, which is about 84 in number and arranged symmetrically, covering an area of ​​about length×width×height (mm)=9500×2300×3200.

[0059] S2, the particle membrane high-speed filter assembly is filled with adsorbent. The adsorbent filling volume of each particle membrane high-speed filter assembly is 700-1200mm high, filled with 0.6-1.6mm quartz sand or organic particles or PVC particles or PP particles, the water inlet flow rate is 36m / h, and the backwash water volume is about 2m 3 / h, backwashing is in the form of steam and water, and the backwashing time is 5min.

[0060] S3, after the alkaline wastewater passes through the particle membrane high-speed filtration component, the suspended solids and turbidity in the water are removed; the water production indicators of suspended solids are <5.5mg / L, and the turbidity is 1.2NTU.

[0061] 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 particle membrane high-speed filtration component, characterized in that: It adopts columnar structure, filler adsorption and auxiliary film-forming process, and the operation process is water inlet from bottom to top, which includes: 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.

2. A particle membrane high-speed filtration component according to claim 1, characterized in that: The adsorbent includes one or a combination of walnut kernels, anthracite, quartz sand, garnet, fluorite, organic particles, PVC particles, PP particles, and slag.

3. According to claim 1, a particle membrane high-speed filtration component, 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.

4. A particle membrane high-speed filtration component according to claim 1, characterized in that: It also includes a water distributor, which is a sieve plate with different pore sizes and is located between the adsorbent and the lower end plate.

5. A particle membrane high-speed filtration component according to claim 1, characterized in that: The columnar shell has an expansion area and a working area inside, wherein the expansion area is the movement area of ​​the water collection component and the working area is the adsorbent adding area; during backwashing, an alternating cleaning method of the expansion area and the working area is adopted.

6. A particle membrane high-speed filtration component according to claim 1, 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.

7. A particle membrane high-speed filtration component according to claim 1, characterized in that: The upper end plate is pressed onto the end of the columnar shell through a first sealing ring, and a water outlet is embedded on the upper end plate.

8. A particle membrane high-speed filtration component according to claim 1, characterized in that: The lower end plate is pressed against the end of the columnar shell through a second sealing ring, and an external water distributor is connected to the lower end plate. Raw water enters the columnar shell from around the external water distributor to achieve uniform water distribution.

9. A particle membrane high-speed filtration component according to claim 1, characterized in that: The particle membrane high-speed filtration component has a diameter of 200 to 500 mm and a height of 1500 to 3500 mm.

10. The particle membrane high-speed filtration components according to any one of claims 1 to 9 form a particle membrane high-speed filtration device, which is used in water treatment.

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