• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Summary Method for removing water pollutants with membrane filtration and production of free radicals, which reduce free and chemically lost organic matter etc. The method also comprises a process for continuous cleaning of the membrane surface and a final destruction of the free radicals with antioxidants and a backwash process with air.
    公开号:SE1200628A1
    申请号:SE1200628
    申请日:2012-11-30
    公开日:2014-05-31
    发明作者:Bo Pahlen
    申请人:Tendac Ab；
    IPC主号:
    专利说明:

    Description of the invention Introduction Some of the more common methods in the water filtration technology of today are filtration through sand, microfiltration through screen cloths or activated carbon and, ultrafiltration through so-called ultrafilter membranes.
    The water to be treated may be from groundwater sources, lakes or various types of ponds or watercourses. There may also be recirculating water in the industry just to name a few.
    Common contaminants to be removed from organic suspensions, humus, particles, color colloids, gels and oxygen-consuming substance.
    Common problems Treatment of water with the help of a sand filter bath meant that the reduction of particles and suspensions would not be large enough without the incoming water first flocking or chlorination taking place. If this does not happen, only particles that are 10 μm or larger are deposited.
    Another problem is that the filter container together with the sand forms a large, heavy and bulky part, which in turn means that the choice of manufacturing, storage and transport costs becomes unreasonably high in relation to the performance of the sand filter. The sand filter container is usually circular, and has a pair-shaped lateral section, which means that it cannot be rock-mounted and therefore occupies a large floor space at the installation site. Treatment of water by means of microfiltration means that all particles larger than the filter medium pores accumulate on the surface of the filter media. When clogging, the filter must be cleaned or replaced with a new one. 1 2 Treatment of water with ultrafilter membranes meant that it is intended to remove contaminants of small size, such as humus, color colloids or other small particles of various kinds as well as ions with low molecular weight. When applying the method, a pre-filtration is often required because practically all types of water also contain contaminants of a higher order of magnitude. The method also entails a water loss of about 25 to 35%.
    Treatment of water with activated carbon in baths or in cartridges can only be applied to small units and constitutes a method for fine filtration of already pre-filtered water. One gram of activated carbon has an absorption surface of about 10 square meters, where very small particles accumulate. In the case of plants with large coal baths, it thus becomes too costly to replace the coal mass and replace it with a new one, which during continuous operation normally takes place every 14 days.
    If it is assumed that water to be treated is not chlorinated, it can be stated that the above-mentioned methods, in addition to ultrafiltration, have in common that the contaminants accumulate on the surface of the filter medium, which means that this coating must be removed at regular intervals or that the filter medium must be replaced with a new one.
    One reason for the accumulation of substance on filter media is that water, which is forced into a filter housing and covers the entire surface of the filter media, lacks any nominal movement closest to the coating, which is gradually and unobstructedly built up on the filter surface. This well-known phenomenon was the reason why membrane filtration began to develop, where at the expense of water losses and much more costly facilities than the previous alternative methods were required, where by means of a continuously flowing water layer over the surface of the filter medium this coating layer could be prevented. With this procedure, about 30% of the water is flushed away, which is often too much because most water sources have a scarce supply of water.
    The above facts are the edge of the artisan. The present invention solves the problem which concerns the accumulation of contaminants on filters and membrane surfaces in different filtration contexts which are common to the methods which are currently applied and the problem which meant that more than one treatment method must be resorted to for the treatment of water, which contains both large and small pollutants.
    The invention is comprised, inter alia, of a device in which it is avoided that the contaminants accumulate on the filter surface. This method involved arranging a constantly circulating loop flow around the circular filter surface. This is achieved with extremely small water losses.
    The invention is also encompassed by a process which takes place in a device belonging to the invention, in which the reduction of contaminants such as organic suspensions, particles, gels, color colloids and chemically dissolved oxygen-consuming substance is removed in a manner which results in longer purification than can be obtained. with flag previous kand method. The description of this process can be found under the heading "Function and process description" below.
    Description of the components belonging to the device The method according to the invention is described with the aid of a device, which is found in Figures 1 and 2.
    In the description below, certain clever technical construction details are fringed, such as seals, fasteners, fittings, coupling devices, wall thicknesses, closures, etc., which are irrelevant to the basic process technical arrangements which apply to the invention itself as such.
    The filter housing (1), which in all parts consists of steel, ceramic or some plastic material, consists of a straight-line rudder, fitted with the batten and fitted at the top with a flange (2) with a circular fold (3).
    There is a membrane (4) in the filter housing (1). This membrane consists of two layers. The layer through which the untreated water first passes, and which at the same time forms a porous support layer for adjacent layers, may consist of a ceramic porous material, or a sintered metal such as, for example, sintered titanium with a pore size of varying order from 20 μm to 0.1 4 pm, but preferably 10 pm. Adjacent layers downstream of the water flow direction consist of a titanium oxide layer with a porosity which can be varied from 20 μm to 0.1 mm, but preferably 10 μm.
    The membrane (4) has a larger diameter at the bottom than at the top. Its lateral section can be marked by a truncated cone whose secant to the vertical plane can be varied between 0 and 60 degrees, but should preferably be 20 degrees.
    The lower spirit of this membrane (4) is provided with a bottom, which consists of the same material as the mantle surface. In its owe part it has an angled flange, which fits into the seam (3) in the flange (2) of the filter housing. Inside the membrane (4) is placed a glass tube (5), which is open in some spirits. It is held in its upper part clamped in a stuffing box (6). Inside this glass tube (5) is placed another glass tube (7), the bottom of which is closed and whose upper spirit reaches up to the lid (8) of the filter housing and is retained by a stuffing box (9) arranged in the lid (8). The glass tube (7) is fitted with a closure (11) at the top. In this glass tube (7) there is a UV fluorescent tube (12), the power supply cable of which runs through the closure (11).
    In the filter housing cover (8) there is a horizontal fixed outlet sleeve (14), intended to lead out treated water and inlet for backwash water.
    In the upper part of the filter housing (1) there is a connecting pipe (13) for incoming water during the filtration process. This rudder is angled, so that the water inflow becomes tangential. This inlet procedure mediates that the water is brought into rotation around the membrane surface.
    Flow profile during normal filtration. See Figure 1.
    The water is pumped in by means of the pump (18) to the filter housing (1) via the inlet (13), after which it passes through the membrane filter (4). There the water passes through this membrane filter (4) and is then led in the downward direction, and is then carried up between the outer glass tube (5) and the inner glass tube (7) and finally led out of the outer part of the outer glass tube (5) to the outlet ( 14) for forwarding via a multi-way valve (10) as return water to the tank or pool. 4 Flow profile during backwashing of membrane filter See Figure 2.
    The backwash water is pumped by means of the pump (18) to the inlet (14) and is passed on through the glass tube (5) in the downward direction. Then continue in the upward direction between the glass tube (5) and the membrane filter (4) to finally be diverted via the multi-way valve (10) to the drain via the line (21).
    Functional and process description During operation, ultraviolet straining is emitted from the UV fluorescent tube (12) within a wavelength range, of 175 to 260 nm but preferably 254 nm.
    When the ultraviolet radiation hits the titanium oxide layer, free radicals are produced in the passing and remaining carbonaceous mass, which in turn creates a process in the water in which the decomposition of organic matter and also chemically bound organic substances takes place. This process also takes place in the water space between the glazed tubes and within the water space between the glass vessel (5) and the membrane (4) with its titanium oxide-coated layer.
    This process works in such a way that certain atoms and molecules lose a resp. several electrons, and thus strives to replace the loss by capturing electrons from other atoms and / or molecules which in turn act in the same way, etc. A chain reaction is formed, which goes quickly, whereby contaminations of various kinds are reduced. When a free radical * rear an antioxidant, a new free radical is not formed. Chain reaction stops but the antioxidant has been consumed at the same time.
    Since the free radicals must be destroyed before the purified water is used, it is in the invention that an antioxidant is metered into the water during operation before it empties from the outlet line, which is connected to the outlet (14). For this purpose, the device is provided with a nipple (16), to which a dosing device must be able to be connected in order to supply an antioxidant in the water space under the lid of the cupped filter housing (8).
    In order to avoid the build-up of obstructing layers on the membrane (4), the invention means a method which means that the water between the cradle of the filter housing and the membrane (4) is caused to flow in a spiral form from the inlet (13). This process, which causes the membrane surface to be partially but continuously rinsed clean, prevents bacteria and other microorganisms, together with ions and organic matter, from forming adherent layers on the membrane and mediates in such a way that the water is formed to pass through the membrane continuously.
    Unlike the methods stated in the introduction, valley, filter or membrane coatings are not deposited continuously, which entailed significant costs caused by constantly changing filter changes or noticeable water losses due to repeated backwashing intervals, this method allows this procedure to avoid minimal coating on membranes. water loss. The river arrangement according to the device is shown in Sketch 1 with male instructions as below.
    The purpose of the glass tube (5) is to provide two flow paths within that membrane (4), one passing through the glass (5) and the other between the glass (5) and the membrane (4), doubling the flow rate of the water and reducing its thickness. to the sea and that the water in these! Ada flow areas is irradiated with the ultraviolet light at the same time.
    As the water becomes alit cleaner during the irradiation phase of the flow process, the shadow zones of the uv-radiation will gradually decrease in number, which means that to a varying degree during the passage of the water stream a killing of any non-deposited microorganisms including bacteria and viruses etc. glazed (5). These are destroyed by UV radiation alone by knocking out their DNA molecule.
    The ratio between the diameter of the glass tube (10) and the glass (5) should be from 1: 2 to 1: 4 but preferably 1: 3. The ratio between the diameter of the glass tube (5) and the membrane (4) should be from 1: 1.2 to 1 : 8 but preferably 1: 1.3.
    The glass (5), which is tipped in both spirits, causes the water to flow longer distances within the UV-irradiated area in order to minimize emerging shadow zones as the contaminations of the water mainly consist of substances which cause turbidity. 6 9
    权利要求:
    Claims (11)
    [1]
    A filter housing (1) having an inlet portion comprising an inlet pipe (13) adapted to direct polluted water into the filter housing (1) and an outlet portion comprising an outlet pipe (14) adapted to divert purified water from the filter housing (1); A porous membrane (4) comprising a bottom and a mantle surface arranged inside the inlet part of the filter housing (1), and having a large diameter at the bottom and at the top and thereby forming the shape of a dull pad cone; A first glass tube (5) opened in said spirits and arranged in the inlet part around the center of the filter housing (1) inside the membrane (4), the inlet part being in fluid communication with the outlet part through the glass tube (5); - a second glass tube (7) with closed bottom arranged inside the first glass tube (5); and 4. a UV fluorescent tube (12) housed in the second glass tube (7) and adapted to emit straining of ultraviolet light to strike a layer present on the membrane (4), to produce free radicals, which in turn lead to combustion and decomposition of said contaminants in the water passing through the irradiation area, the lower end of the glass tube (5) being arranged near the bottom of the membrane (4) to extend the water flow fluid - from the membrane (4) to the outlet part.
    [2]
    The device of claim 1, further comprising an air compressor (20) disposed adjacent the outlet portion of the filter housing (1) and adapted to supply air to the water when the device is backwashed and an ultrasonic unit (22) adapted to deliver ultrasound to the diaphragm (4) to effect cleaning of the surface of the membrane (4) and its pores.
    [3]
    Device according to claim 1 or 2, further comprising a dosing pump arranged in connection with the outlet part of the filter housing (1) and adapted to supply an antioxidant to the water to stop the production of free radicals.
    [4]
    Device according to any one of the preceding claims, wherein the lateral section of the membrane (4) is inclined towards the vertical plane at an angle between 0 and 60 degrees, preferably 20 degrees.
    [5]
    Device according to any one of the preceding claims, wherein the layer applied to the membrane (4) consists of sintered titanium oxide.
    [6]
    Device according to any one of the preceding claims, wherein the UV fluorescent lamp (12) is adapted to emit ultraviolet light straining with a wavelength between 175 and 260 nm, preferably 254 nm.
    [7]
    Device according to any one of the preceding claims, wherein the inlet pipe (13) is arranged at an angle to the side cradle of the filter housing (1) in order to provide tangential water flow towards the membrane (4).
    [8]
    Process for decomposition and removal of impurities such as organic suspensions, humus, particles, gels, color colloids and chemical oxygen-consuming substances, etc. from water, comprising the following steps: 1. directing the water to be purified into a filter housing (1) with an inlet part via an inlet pipe (13); 2. passing the water through a porous membrane (4), comprising a bottom and a mantle surface arranged inside the inlet part of the filter housing (1), and which has a larger diameter at the bottom than at the top and thereby forms the shape of a truncated cone; 3. passing the water through a first glass tube (5) Open in [Dada spirits and arranged in the inlet part around the center of the filter housing (1) inside the membrane (4), the inlet part being in fluid communication with an outlet part of the filter housing (1) through the glass tube (5) ); and 4. directing the water out of the outlet portion via an outlet tube (14), the water being irradiated with ultraviolet light Than a UV fluorescent tube (12) housed in a second glass tube (7) with a closed bottom and arranged inside the first glass tube below it passage from the membrane (4) to the outlet part, whereby the ultraviolet light is allowed to strike a layer present on the membrane (4), in order to emit free radicals, which in turn leads to combustion and decomposition of said pollutants in the water passing through the irradiation area. , and 11 wherein the flow path of the water from the membrane (4) to the outlet part is extended by arranging the lower end of the glass tube (5) near the bottom of the membrane (4).
    [9]
    The method of claim 8, further comprising the step of performing a backwash to remove coatings from the outer shell surface of the membrane (4) while supplying air to an air compressor (20) disposed adjacent the outlet portion of the filter housing (1) and delivering ultrasound to the membrane. (4) by means of an ultrasonic device (22).
    [10]
    The method of claim 8 or 9, further comprising the step of adding an antioxidant to the water to stop the generation of free radicals.
    [11]
    A method according to any one of claims 8 to 10, wherein the water to be purified is led at an angle to the side cradle of the filter housing (1) to provide tangential water flow towards the membrane (4). _Ir - 11_
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    同族专利:
    公开号 | 公开日
    WO2014084782A1|2014-06-05|
    SE538014C2|2016-02-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3551091A|1968-07-01|1970-12-29|Louis P Veloz|Combination water filter and sterilizer|
    AT388365B|1986-11-17|1989-06-12|Venturama Ag|DEVICE FOR TREATING WATER|
    US5529689A|1994-09-23|1996-06-25|Korin; Amos|Replaceable integrated water filtration and sterilization cartridge and assembly therefor|
    WO2008076082A1|2006-12-20|2008-06-26|Nanyang Technological University|Microspheric tio2 photocatalyst|
    WO2010032765A1|2008-09-16|2010-03-25|財団法人北九州産業学術推進機構|Water that expresses pathogen-resistance genes to encode plant immunoproteins, a method of preventing plant diseases using the water, and a device for producing the water|CN110665254A|2019-08-20|2020-01-10|东莞市悉达纳米科技有限公司|Equipment for extracting solution by applying multidimensional superposed quanta|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1200628A|SE538014C2|2012-11-30|2012-11-30|Device for membrane filtration of water with free radicals and backwash with air and ultrasound|SE1200628A| SE538014C2|2012-11-30|2012-11-30|Device for membrane filtration of water with free radicals and backwash with air and ultrasound|
    PCT/SE2013/051395| WO2014084782A1|2012-11-30|2013-11-27|Apparatus and method for membrane filtration of water with free radicals|
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