CN105727748A - Rotary ultrafiltration deoiling device - Google Patents
Rotary ultrafiltration deoiling device Download PDFInfo
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- CN105727748A CN105727748A CN201610164572.2A CN201610164572A CN105727748A CN 105727748 A CN105727748 A CN 105727748A CN 201610164572 A CN201610164572 A CN 201610164572A CN 105727748 A CN105727748 A CN 105727748A
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- 238000000108 ultra-filtration Methods 0.000 title claims abstract description 104
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000005238 degreasing Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 78
- 238000011001 backwashing Methods 0.000 claims description 19
- 230000004907 flux Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 210000005056 cell body Anatomy 0.000 claims 6
- 238000001914 filtration Methods 0.000 claims 2
- 238000011010 flushing procedure Methods 0.000 claims 2
- 206010053615 Thermal burn Diseases 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 4
- 239000002351 wastewater Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000012510 hollow fiber Substances 0.000 description 2
- 238000010409 ironing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009285 membrane fouling Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005371 permeation separation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/16—Rotary, reciprocated or vibrated modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
本发明提供了一种旋转式超滤除油装置，包括池体和进水管，进水管穿过池体其中一侧的侧壁与池体内部相连通；池体内设有支架、旋转超滤系统和变速箱，支架与池体底部固接，旋转超滤系统和变速箱均固定于支架上，变速箱与旋转超滤系统连接；旋转超滤系统包括旋转式超滤除油膜盘、中空轴、超滤液收集系统和放空管，旋转式超滤除油膜盘通过超滤液收集系统与中空轴相连通，且中空轴穿过旋转式超滤除油膜盘的中心，中空轴的一端封闭，中空轴的另一端连接有出水管，出水管与外界收集装置连接；放空管连接旋转超滤系统的出油端，且放空管穿出池体侧壁与外界收集装置连接。本发明中，可通过旋转式超滤装置进行油水分离，运行过程可实现自动化与长时间运行。
The invention provides a rotary ultrafiltration degreasing device, comprising a pool body and a water inlet pipe, the water inlet pipe passes through the side wall of one side of the pool body and communicates with the inside of the pool body; and the gearbox, the bracket is fixed to the bottom of the pool body, the rotary ultrafiltration system and the gearbox are fixed on the bracket, and the gearbox is connected to the rotary ultrafiltration system; the rotary ultrafiltration system includes a rotary ultrafiltration degreasing film disc, a hollow shaft, The ultrafiltrate collection system and the vent pipe, the rotary ultrafiltration oil removal film disc is connected to the hollow shaft through the ultrafiltrate collection system, and the hollow shaft passes through the center of the rotary ultrafiltration oil removal film disc, and one end of the hollow shaft is closed. The other end of the hollow shaft is connected with a water outlet pipe, which is connected to an external collection device; the vent pipe is connected to the oil outlet of the rotary ultrafiltration system, and the vent pipe passes through the side wall of the pool body to connect with the external collection device. In the present invention, the oil-water separation can be carried out through the rotary ultrafiltration device, and the operation process can be automated and run for a long time.
Description
技术领域technical field
本发明属于水处理装置技术领域，涉及膜法水处理技术和膜分离技术，具体涉及一种旋转式超滤除油装置。The invention belongs to the technical field of water treatment devices, and relates to membrane water treatment technology and membrane separation technology, in particular to a rotary ultrafiltration oil removal device.
背景技术Background technique
含油废水来源主要包括石油加工系列过程中所产生的废水，石油运输过程中的排放水，运油车辆的清洗废水等。另外在某些轻工业制造过程之中例如食品工业、纺织业也会产生大量的油类物质。完成油水分离的过程。气浮法现在已经广泛应用于各种含油废水的处理过程。The sources of oily wastewater mainly include wastewater generated during petroleum processing series, discharge water during petroleum transportation, and cleaning wastewater of oil transportation vehicles. In addition, in some light industrial manufacturing processes such as food industry and textile industry, a large amount of oily substances will also be produced. Complete the process of oil-water separation. Air flotation has now been widely used in the treatment of various oily wastewater.
膜分离含油废水技术是一种新兴的油水分离技术有着其他分离技术所不具备的有优势，目前常应用于含油废水处理的膜分离技术主要有反渗透、超滤、微滤、电渗析和纳滤。超滤是一种能够将溶液进行净化、分离或者浓缩的膜透过法分离技术，多年来发展很快，应用面非常广泛，小至家用饮水器，大到现代化工业生产，从普通民用到高新技术领域都有不同规模不同数量的应用，甚至于在环境保护方面也有着极大的使用潜力。超滤是一种具有广阔发展前景的膜分离技术。Membrane separation oily wastewater technology is a new oil-water separation technology with advantages that other separation technologies do not have. At present, membrane separation technologies commonly used in oily wastewater treatment mainly include reverse osmosis, ultrafiltration, microfiltration, electrodialysis and nanofiltration. filter. Ultrafiltration is a membrane permeation separation technology that can purify, separate or concentrate solutions. It has developed rapidly over the years and has a wide range of applications, ranging from household drinking fountains to modern industrial production, from ordinary civilian use to high-tech The technical field has different scales and different numbers of applications, and even has great potential for use in environmental protection. Ultrafiltration is a membrane separation technology with broad development prospects.
目前常见的超滤除油装置及其缺点如下：The current common ultrafiltration degreasing devices and their disadvantages are as follows:
(1)板式超滤装置。装置牢固，适合在广泛的压力范围内工作，流道间隙大小可调，不易堵塞。但装置较为笨重，单位体积内有效膜面积较小，且膜的强度要求较高。(1) Plate ultrafiltration device. The device is solid and suitable for working in a wide range of pressures. The size of the flow channel gap is adjustable and not easy to block. However, the device is relatively bulky, the effective membrane area per unit volume is small, and the strength of the membrane is required to be high.
(2)卷式超滤装置。装置膜面的清洗比较容易，单位体积内膜的充填密度较低，占地面积大；膜管的连接件多，设备安装不方便。(2) Roll-type ultrafiltration device. The cleaning of the membrane surface of the device is relatively easy, the filling density of the inner membrane per unit volume is low, and the floor space is large; there are many connectors for the membrane tubes, and the equipment installation is inconvenient.
(3)管式超滤装置。装置单位体积内的有效膜面积较大，水在膜表面流动状态较好，结构紧凑，占地面积小。但装置进水预处理要求较为严格，对所用的膜强度要求较高。(3) Tubular ultrafiltration device. The effective membrane area per unit volume of the device is larger, the water flows better on the surface of the membrane, the structure is compact, and the floor space is small. However, the requirements for the pretreatment of the influent of the device are relatively strict, and the requirements for the strength of the membrane used are relatively high.
(4)中空纤维式超滤装置。装置工作效率高，占地面积小，中空纤维无须支撑物。但膜的清洗较困难，只能用水力冲洗或者化学清洗，不能用机械清洗。(4) Hollow fiber ultrafiltration device. The working efficiency of the device is high, the occupied area is small, and the hollow fiber does not need supports. However, it is difficult to clean the membrane, and it can only be washed with water or chemically, and cannot be cleaned mechanically.
综上所述，现有超滤装置普遍存在膜的清洗、更换困难的缺点，膜污染是一个经常遇到而又难以解决的问题。被处理液体中的微粒、胶体粒子、有机物和微生物等大分子溶质与膜产生物理化学作用或机械作用而引起在膜表面或膜孔内吸附、沉淀使膜孔变小或堵塞，导致膜的透水量或分离能力下降，从而导致超滤膜的使用寿命减短，增加了系统的运行成本。To sum up, existing ultrafiltration devices generally have the disadvantage of difficulty in membrane cleaning and replacement, and membrane fouling is a problem that is often encountered and difficult to solve. Macromolecular solutes such as particles, colloidal particles, organic matter and microorganisms in the liquid to be treated have physical, chemical or mechanical interactions with the membrane, causing adsorption and precipitation on the surface of the membrane or in the pores of the membrane, making the pores of the membrane smaller or blocked, resulting in water permeability of the membrane. The amount or separation capacity is reduced, which leads to a shortened service life of the ultrafiltration membrane and increases the operating cost of the system.
发明内容Contents of the invention
本发明旨在于解决传统超滤膜已出现的浓差极化、膜通量随着使用时间延长而降低等问题，发明一种旋转式超滤除油装置。本超滤除油装置利用旋转时产生的高速剪切力，冲刷、清洗膜表面附着的污染物，以降低装置浓差极化程度，确保膜通量保持稳定，进而降低膜的冲洗频率和更换频率。The invention aims to solve the problems of concentration polarization and membrane flux decrease with the prolongation of use time of the traditional ultrafiltration membrane, and invents a rotary ultrafiltration degreasing device. The ultrafiltration oil removal device uses the high-speed shear force generated during rotation to wash and clean the pollutants attached to the membrane surface to reduce the concentration polarization of the device and ensure that the membrane flux remains stable, thereby reducing the washing frequency and replacement of the membrane. frequency.
为了实现上述目的，本发明所采用的技术方案是：In order to achieve the above object, the technical solution adopted in the present invention is:
一种旋转式超滤除油装置，包括池体和进水管，所述进水管穿过池体其中一侧的侧壁与池体内部相连通；所述池体内设有支架、旋转超滤系统和变速箱，所述支架与池体底部固接，所述旋转超滤系统和变速箱均固定于支架上，所述变速箱与旋转超滤系统连接；所述旋转超滤系统包括旋转式超滤除油膜盘、中空轴、超滤液收集系统和放空管，所述旋转式超滤除油膜盘通过超滤液收集系统与中空轴相连通，且所述中空轴穿过旋转式超滤除油膜盘的中心，中空轴的一端封闭，中空轴的另一端连接有出水管，出水管与外界收集装置连接；放空管连接旋转超滤系统的出油端，且放空管穿出池体侧壁与外界收集装置连接。A rotary ultrafiltration oil removal device, including a pool body and a water inlet pipe, the water inlet pipe passes through the side wall of one side of the pool body and communicates with the inside of the pool body; the pool body is provided with a bracket, a rotary ultrafiltration system and a gearbox, the bracket is fixed to the bottom of the pool body, the rotary ultrafiltration system and the gearbox are fixed on the bracket, and the gearbox is connected to the rotary ultrafiltration system; the rotary ultrafiltration system includes a rotary ultrafiltration system Filter out the oil film disc, hollow shaft, ultrafiltrate collection system and vent pipe, the rotary ultrafiltration oil removal film disc is connected with the hollow shaft through the ultrafiltrate collection system, and the hollow shaft passes through the rotary ultrafiltration In the center of the degreasing film disc, one end of the hollow shaft is closed, and the other end of the hollow shaft is connected to a water outlet pipe, which is connected to an external collection device; the vent pipe is connected to the oil outlet end of the rotary ultrafiltration system, and the vent pipe passes through the pool The side wall of the body is connected with the external collection device.
进一步，所述旋转式超滤除油装置还包括反冲洗系统，所述反冲洗系统包括反冲洗泵、反冲洗管道、反冲洗过滤装置、阀门和压力表，反冲洗泵的进口端连接外界的清水，反冲洗泵的出口端连接反冲洗管道，反冲洗管道上沿反冲洗泵到反冲洗管道出口端的方向上依次设有压力表和反冲洗过滤装置、阀门；所述反冲洗管道出口端与所述出水管的出口端为可拆卸连接。Further, the rotary ultrafiltration oil removal device also includes a backwashing system, the backwashing system includes a backwashing pump, a backwashing pipeline, a backwashing filter device, a valve and a pressure gauge, and the inlet end of the backwashing pump is connected to an external For clear water, the outlet end of the backwash pump is connected to the backwash pipeline, and the backwash pipeline is provided with a pressure gauge, a backwash filter device, and a valve in sequence along the direction from the backwash pump to the outlet end of the backwash pipeline; the outlet end of the backwash pipeline is connected to The outlet end of the water outlet pipe is detachably connected.
进一步，所述旋转式超滤除油膜盘上的超滤膜材料为聚偏氟乙烯材质，所述超滤膜的膜通量为80～100L/m2·h。Further, the ultrafiltration membrane material on the rotary ultrafiltration degreasing film disc is made of polyvinylidene fluoride, and the membrane flux of the ultrafiltration membrane is 80-100 L/m 2 ·h.
进一步，所述的旋转式超滤除油膜盘是由6片相同的60度扇形结构组合而成的一个圆形结构，每一片扇形结构包括超滤膜和膜支承装置。Further, the rotary ultrafiltration degreasing film disk is a circular structure composed of six identical 60-degree fan-shaped structures, and each fan-shaped structure includes an ultrafiltration membrane and a membrane support device.
进一步，所述的膜支承装置采用多孔板，且为扇形结构；所述的多孔板为ABS硬质塑料，板厚10mm，所述超滤膜与多孔板采用内烫法结合。Further, the membrane supporting device adopts a porous plate with a fan-shaped structure; the porous plate is made of ABS hard plastic with a thickness of 10mm, and the ultrafiltration membrane and the porous plate are combined by internal ironing.
进一步，所述的旋转超滤系统的转速为50～100rpm。此时膜的剪切流速最为合适，同时这个时候的膜的抗污染能力最强，膜的使用寿命也最长。Further, the rotational speed of the rotary ultrafiltration system is 50-100 rpm. At this time, the shear flow rate of the membrane is the most suitable, and at the same time, the anti-pollution ability of the membrane is the strongest, and the service life of the membrane is the longest.
进一步，在所述支架的顶部设有一个顶盖。Further, a top cover is provided on the top of the bracket.
本发明的有益效果是，含油污水中的污染物可以通过旋转式超滤装置进行分离，装置克服了普通超滤装置的膜污染问题，运行过程可实现自动化与长时间运行；装置在常温下运行对被处理物无形态或化学影响，无需从外界加入其它物质，节省原材料和化学药品。本发明利用旋转给膜提供了剪切力从而冲刷了膜表面附着的污染物，保证了膜的水通量，降低了膜的反冲洗频率和更换频率。本发明装置膜系统寿命长、运行成本低，装置占地面积小、适应性强、除油效率高。The beneficial effect of the present invention is that the pollutants in the oily sewage can be separated by the rotary ultrafiltration device, the device overcomes the membrane pollution problem of the common ultrafiltration device, and the operation process can be automated and run for a long time; the device operates at normal temperature It has no form or chemical influence on the treated object, no need to add other substances from the outside, saving raw materials and chemicals. The invention utilizes the rotation to provide shearing force to the membrane so as to wash away the pollutants attached to the surface of the membrane, ensure the water flux of the membrane, and reduce the frequency of backwashing and replacement of the membrane. The membrane system of the device of the invention has long service life, low operating cost, small occupied area of the device, strong adaptability and high oil removal efficiency.
附图说明Description of drawings
图1为本发明的主视结构示意图；Fig. 1 is the front view structure schematic diagram of the present invention;
图2为本发明的俯视结构示意图；Fig. 2 is the top view structure schematic diagram of the present invention;
图3为本发明的左视结构示意图；Fig. 3 is the left view structure schematic diagram of the present invention;
图4为本发明的旋转式超滤除油膜盘的放大结构示意图。Fig. 4 is a schematic diagram of the enlarged structure of the rotary ultrafiltration oil removal film disc of the present invention.
图中，1-进水管，2-反冲洗泵，3-反冲洗过滤装置，4-阀门，5-压力表，6-旋转超滤系统，7-顶盖，8-旋转式超滤除油膜盘，9-变速箱，10-放空管，11-出水管In the figure, 1-water inlet pipe, 2-backwash pump, 3-backwash filter device, 4-valve, 5-pressure gauge, 6-rotary ultrafiltration system, 7-top cover, 8-rotary ultrafiltration oil removal film Disk, 9-gearbox, 10-vent pipe, 11-outlet pipe
具体实施方式detailed description
下面结合具体实施例对本发明作进一步描述：The present invention will be further described below in conjunction with specific embodiment:
如图1～3所示，一种旋转式超滤除油装置，包括池体和进水管1，所述进水管1穿过池体其中一侧的侧壁与池体内部相连通；所述池体内设有支架、旋转超滤系统6和变速箱9，所述支架与池体底部固接，所述旋转超滤系统6和变速箱9均固定于支架上，所述变速箱9与旋转超滤系统6连接；所述旋转超滤系统6包括旋转式超滤除油膜盘8、中空轴、超滤液收集系统和放空管10，所述旋转式超滤除油膜盘8通过超滤液收集系统与中空轴相连通，且所述中空轴穿过旋转式超滤除油膜盘8的中心，中空轴的一端封闭，中空轴的另一端连接有出水管11，出水管11与外界收集装置连接；放空管10连接旋转超滤系统6的出油端，且放空管10穿出池体侧壁与外界收集装置连接。As shown in Figures 1 to 3, a rotary ultrafiltration oil removal device includes a pool body and a water inlet pipe 1, and the water inlet pipe 1 passes through the side wall of one side of the pool body and communicates with the inside of the pool body; The tank body is provided with a bracket, a rotary ultrafiltration system 6 and a gearbox 9, the bracket is fixedly connected to the bottom of the pool body, the rotary ultrafiltration system 6 and the gearbox 9 are fixed on the bracket, and the gearbox 9 is connected to the rotary The ultrafiltration system 6 is connected; the rotary ultrafiltration system 6 includes a rotary ultrafiltration degreasing film disc 8, a hollow shaft, an ultrafiltrate collection system and a vent pipe 10, and the rotary ultrafiltration degreasing film disc 8 passes through the ultrafiltration The liquid collection system is connected with the hollow shaft, and the hollow shaft passes through the center of the rotary ultrafiltration degreasing film disc 8, one end of the hollow shaft is closed, and the other end of the hollow shaft is connected with a water outlet pipe 11, and the water outlet pipe 11 collects with the outside world Device connection; the vent pipe 10 is connected to the oil outlet end of the rotary ultrafiltration system 6, and the vent pipe 10 passes through the side wall of the pool body to connect with the external collection device.
所述旋转式超滤除油装置还包括反冲洗系统，所述反冲洗系统包括反冲洗泵2、反冲洗管道、反冲洗过滤装置3、阀门4和压力表5，反冲洗泵2的进口端连接外界的清水，反冲洗泵2的出口端连接反冲洗管道，反冲洗管道上沿反冲洗泵2到反冲洗管道出口端的方向上依次设有压力表5和反冲洗过滤装置3、阀门4；所述反冲洗管道出口端与所述出水管11的出口端为可拆卸连接。The rotary ultrafiltration oil removal device also includes a backwash system, the backwash system includes a backwash pump 2, a backwash pipeline, a backwash filter device 3, a valve 4 and a pressure gauge 5, and the inlet port of the backwash pump 2 Connect the clean water from the outside, the outlet end of the backwash pump 2 is connected to the backwash pipeline, and the backwash pipeline is provided with a pressure gauge 5, a backwash filter device 3, and a valve 4 in sequence along the direction from the backwash pump 2 to the outlet end of the backwash pipeline; The outlet end of the backwashing pipe is detachably connected to the outlet end of the outlet pipe 11 .
所述旋转式超滤除油膜盘8上的超滤膜材料为聚偏氟乙烯材质，所述超滤膜的膜通量为80～100L/m2·h，这种材料力学性能优良、冲击强度高、韧性好，化学稳定性好。有利于膜通量的稳定。The ultrafiltration membrane material on the rotary ultrafiltration degreasing film disc 8 is made of polyvinylidene fluoride, and the membrane flux of the ultrafiltration membrane is 80-100 L/m2 h. This material has excellent mechanical properties and impact strength. High, good toughness, good chemical stability. Conducive to the stability of membrane flux.
如图4所示，所述的旋转式超滤除油膜盘8是由6片相同的60度扇形结构组合而成的一个圆形结构，每一片扇形结构包括超滤膜和膜支承装置。此处完成对含油污水的超滤处理。As shown in Figure 4, the rotary ultrafiltration degreasing film disc 8 is a circular structure composed of 6 identical 60-degree fan-shaped structures, and each fan-shaped structure includes an ultrafiltration membrane and a membrane support device. The ultrafiltration treatment of oily sewage is completed here.
所述的膜支承装置采用多孔板，且为扇形结构；所述的多孔板为ABS硬质塑料，板厚10mm，所述超滤膜与多孔板采用内烫法结合。The membrane supporting device adopts a porous plate with a fan-shaped structure; the porous plate is made of ABS hard plastic with a thickness of 10mm, and the ultrafiltration membrane and the porous plate are combined by internal ironing.
所述的旋转超滤系统6的转速为50～100rpm。此时膜的剪切流速最为合适，同时这个时候的膜的抗污染能力最强，膜的使用寿命也最长。当轴以设计转速运转时，膜在水流的剪切力的作用下会冲刷掉膜上的一些污染物，从而起到延长膜的更换周期的作用。The rotational speed of the rotary ultrafiltration system 6 is 50-100 rpm. At this time, the shear flow rate of the membrane is the most suitable, and at the same time, the anti-pollution ability of the membrane is the strongest, and the service life of the membrane is the longest. When the shaft runs at the designed speed, the membrane will wash away some pollutants on the membrane under the shear force of the water flow, thereby prolonging the replacement period of the membrane.
进一步，在所述支架的顶部设有一个顶盖7，顶盖7可防止外界杂物进入超滤系统。Further, a top cover 7 is provided on the top of the bracket, and the top cover 7 can prevent foreign matter from entering the ultrafiltration system.
本旋转式超滤除油装置在进行工作时，含油污水从进水管1进入池体后再进入旋转超滤系统6。在旋转超滤系统6中，含油废水在旋转提供的剪切力下与超滤膜接触，以膜两侧的压力差为驱动力，膜表面密布的许多细小的微孔只允许含油废水中的小分子水从高压的料液侧透过超滤膜到低压侧，从而进入膜支承结构内部；而原液中体积大于膜表面微孔径的大分子油则被截留在膜的进液侧，使得油在超滤剩余液中浓度增大，从而实现对含油废水的净化、分离和浓缩的目的。其中的水透过超滤膜，在超滤液收集系统收集后进入中空轴，从排水管11排出；而原废水中的含水量降低，浓缩液经过放空管10排出，达到油水分离的效果。同时，由于含油废水旋转提供的剪切力下对超滤膜表面进行冲刷，可在一定程度上减少膜表面附着的污染物，延长了膜的使用时间。在本旋转式超滤除油装置中，变速箱起到降低转速的作用，使得超滤系统在一个较低的转速下运行。超滤膜的清洗是通过反冲洗系统来进行的，当需要进行反冲洗时，将反冲洗管道的出口端与出水管的出口端连接，将上反冲洗管道的阀门4打开，通过反冲洗泵2从外界引入清水，经过反冲洗管道、出水管1、中空轴，进入旋转式超滤除油膜盘，采用的原理是在超滤膜的透过侧施加反压力的方法，将清水用反冲洗泵2加压推进到超滤膜的原液侧中，帮助消除附着在超滤膜表面上的污染物，由反冲洗过滤装置收集，从而达到清洗的目的，在反冲洗过程中，反冲洗泵为反冲洗提供动力，将水从反冲洗管打入超滤系统，对超滤膜进行冲洗。反冲洗过滤装置3用来过滤自来水中的污染物，防止其污染超滤膜，压力表5用来观察反冲洗管道内的水压，再通过阀门4调节水流大小，控制水压，防止水压过大损坏超滤膜或者水压过小不能有效的起到反冲洗的作用。When the rotary ultrafiltration degreasing device is in operation, the oily sewage enters the pool from the water inlet pipe 1 and then enters the rotary ultrafiltration system 6 . In the rotary ultrafiltration system 6, the oily wastewater contacts the ultrafiltration membrane under the shear force provided by the rotation, and the pressure difference on both sides of the membrane is used as the driving force. Small molecular water passes through the ultrafiltration membrane from the high-pressure feed liquid side to the low-pressure side, thereby entering the membrane support structure; while the large molecular oil in the raw liquid whose volume is larger than the micropore diameter of the membrane surface is trapped on the liquid inlet side of the membrane, making the oil The concentration in the ultrafiltration residual liquid increases, so as to achieve the purpose of purifying, separating and concentrating oily wastewater. The water in it passes through the ultrafiltration membrane, enters the hollow shaft after being collected by the ultrafiltrate collection system, and is discharged from the drain pipe 11; while the water content in the raw wastewater is reduced, the concentrated liquid is discharged through the vent pipe 10 to achieve the effect of oil-water separation . At the same time, since the surface of the ultrafiltration membrane is scoured under the shear force provided by the rotation of the oily wastewater, the pollutants attached to the surface of the membrane can be reduced to a certain extent, and the service life of the membrane can be prolonged. In the rotary ultrafiltration degreasing device, the gearbox plays the role of reducing the rotational speed, so that the ultrafiltration system operates at a lower rotational speed. The cleaning of the ultrafiltration membrane is carried out through the backwashing system. When backwashing is required, the outlet end of the backwashing pipe is connected to the outlet end of the outlet pipe, and the valve 4 of the upper backwashing pipe is opened. 2 Introduce clean water from the outside, pass through the backwash pipe, outlet pipe 1, and hollow shaft, and enter the rotary ultrafiltration degreasing film disc. Pump 2 is pressurized and pushed into the raw liquid side of the ultrafiltration membrane to help eliminate the pollutants attached to the surface of the ultrafiltration membrane, which are collected by the backwash filter device to achieve the purpose of cleaning. During the backwash process, the backwash pump is The power is provided by the backwash, and the water is pumped into the ultrafiltration system from the backwash pipe to flush the ultrafiltration membrane. The backwash filter device 3 is used to filter pollutants in the tap water to prevent it from contaminating the ultrafiltration membrane. The pressure gauge 5 is used to observe the water pressure in the backwash pipeline, and then adjust the water flow through the valve 4 to control the water pressure and prevent water pressure. If it is too large to damage the ultrafiltration membrane or the water pressure is too small, it cannot effectively play the role of backwashing.
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Application publication date: 20160706 |