CN104803512A - Ozone catalytic oxidation and self-cleaning ceramic membrane combined water treatment method and device - Google Patents
Ozone catalytic oxidation and self-cleaning ceramic membrane combined water treatment method and device Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 239000012528 membrane Substances 0.000 title claims abstract description 124
- 239000000919 ceramic Substances 0.000 title claims abstract description 118
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 39
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 36
- 230000003647 oxidation Effects 0.000 title claims abstract description 34
- 238000004140 cleaning Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000003054 catalyst Substances 0.000 claims description 18
- 239000000872 buffer Substances 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 10
- 238000011001 backwashing Methods 0.000 claims description 7
- 238000009285 membrane fouling Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 4
- NEGBOTVLELAPNE-UHFFFAOYSA-N [Ti].[Ce] Chemical compound [Ti].[Ce] NEGBOTVLELAPNE-UHFFFAOYSA-N 0.000 claims description 3
- MECMQNITHCOSAF-UHFFFAOYSA-N manganese titanium Chemical compound [Ti].[Mn] MECMQNITHCOSAF-UHFFFAOYSA-N 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims 2
- 238000005516 engineering process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 239000010842 industrial wastewater Substances 0.000 description 5
- 239000002957 persistent organic pollutant Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000005374 membrane filtration Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
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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
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
一种臭氧催化氧化自清洁陶瓷膜水处理装置，包括气液混合输送装置、陶瓷膜过滤器，所述气液混合输送装置与臭氧投加口连接，所述气液混合输送装置通过进水管路将溶解有臭氧的水体从底部通入所述陶瓷膜过滤器的底部，所述陶瓷膜过滤器的内部设有若干个竖直布置的陶瓷膜管，所述进水管路与所述陶瓷膜管相通，并且所述陶瓷膜过滤器的顶端封闭，在所述陶瓷膜过滤器的侧壁上开有出水口。本发明的陶瓷膜过滤器采用模块化结构，每个模块包含一组管状或多通道的陶瓷膜管，模块之间可以通过并联方式连接，根据实际水量灵活设置。本发明同时公开了一种臭氧催化氧化自清洁陶瓷膜水处理方法。
An ozone catalytic oxidation self-cleaning ceramic membrane water treatment device, comprising a gas-liquid mixing delivery device and a ceramic membrane filter, the gas-liquid mixing delivery device is connected to an ozone dosing port, and the gas-liquid mixing delivery device passes through a water inlet pipeline Pass the ozone-dissolved water body into the bottom of the ceramic membrane filter from the bottom, the interior of the ceramic membrane filter is provided with several vertically arranged ceramic membrane tubes, the water inlet pipeline and the ceramic membrane tube communicated, and the top of the ceramic membrane filter is closed, and a water outlet is opened on the side wall of the ceramic membrane filter. The ceramic membrane filter of the present invention adopts a modular structure, each module includes a group of tubular or multi-channel ceramic membrane tubes, the modules can be connected in parallel, and can be flexibly set according to the actual water volume. The invention also discloses an ozone catalytic oxidation self-cleaning ceramic membrane water treatment method.
Description
技术领域technical field
本发明涉及一种臭氧催化氧化自清洁陶瓷膜水处理方法与装置，用于处理难降解有机废水，属于水处理领域。The invention relates to an ozone catalytic oxidation self-cleaning ceramic membrane water treatment method and device, which are used for treating refractory organic wastewater and belong to the field of water treatment.
背景技术Background technique
随着工业化和人口城市化进程的加快，目前我国水资源短缺和水源污染问题日趋严重，其主要污染源为工业废水、生活污水、农业废水等，其中工业废水的危害最为严重。近年来，工业废水处理设施建设不断加快，但是传统的生化处理工艺处理后的废水，仍含有许多难降解有机污染物、细菌及重金属等对人体有毒有害的物质，并且达不到回用水标准。With the acceleration of industrialization and population urbanization, my country's water resource shortage and water pollution are becoming more and more serious. The main sources of pollution are industrial wastewater, domestic sewage, agricultural wastewater, etc., among which industrial wastewater is the most serious hazard. In recent years, the construction of industrial wastewater treatment facilities has been accelerated, but the wastewater treated by traditional biochemical treatment processes still contains many refractory organic pollutants, bacteria and heavy metals, which are toxic and harmful to the human body, and cannot meet the reuse water standard.
臭氧催化氧化技术利用臭氧在催化剂作用下产生羟基自由基氧化分解水中有机污染物，由于羟基自由基的氧化能力极强，可以将绝大多数难降解有机污染物快速氧化分解成低毒或无毒的小分子物质，甚至直接分解成CO2和H2O。与单纯的臭氧氧化相比，臭氧催化氧化技术可以提高臭氧的利用率和氧化能力，适用于工业废水的深度处理。但是臭氧催化氧化技术面临着催化剂易流失，且粉体催化剂回收困难，臭氧催化氧化塔占地面积大、基建费用高等问题。Ozone catalytic oxidation technology uses ozone to generate hydroxyl radicals under the action of a catalyst to oxidize and decompose organic pollutants in water. Due to the strong oxidation ability of hydroxyl radicals, it can quickly oxidize and decompose most refractory organic pollutants into low-toxic or non-toxic The small molecular substances are even directly decomposed into CO 2 and H 2 O. Compared with pure ozone oxidation, ozone catalytic oxidation technology can improve the utilization rate and oxidation capacity of ozone, and is suitable for advanced treatment of industrial wastewater. However, the ozone catalytic oxidation technology faces problems such as easy loss of catalyst, difficulty in recovering powder catalyst, large area occupied by the ozone catalytic oxidation tower, and high infrastructure costs.
陶瓷膜过滤技术以其高效除浊性能，以及陶瓷膜本身耐高温、化学稳定性好、机械强度高、耐酸、耐碱、耐有机溶剂等优势，在工业废水回用领域得以推广应用。但是与其他膜技术一样，陶瓷膜也面临着膜污染导致的膜通量下降，需要进行频繁的反冲洗，不仅严重影响处理效果，同时增大能耗。Ceramic membrane filtration technology has been popularized and applied in the field of industrial wastewater reuse due to its high-efficiency turbidity removal performance, and the advantages of ceramic membrane itself in high temperature resistance, good chemical stability, high mechanical strength, acid resistance, alkali resistance, and organic solvent resistance. However, like other membrane technologies, ceramic membranes also face the decrease of membrane flux caused by membrane fouling, and frequent backwashing is required, which not only seriously affects the treatment effect, but also increases energy consumption.
发明内容Contents of the invention
为解决臭氧催化氧化技术面临的催化剂易流失、粉体催化剂回收难、臭氧催化氧化塔占地面积大、基建费用高，以及陶瓷膜过滤技术因膜污染导致的膜通量和处理效率下降、需要频繁反洗、能耗大等问题，本发明提出了一种臭氧催化氧化技术与自清洁陶瓷膜技术相结合的水处理系统。In order to solve the problems faced by ozone catalytic oxidation technology, such as easy loss of catalyst, difficulty in recovery of powder catalyst, large area of ozone catalytic oxidation tower, high infrastructure cost, and decrease of membrane flux and treatment efficiency due to membrane fouling of ceramic membrane filtration technology, needs Frequent backwashing, high energy consumption and other problems, the present invention proposes a water treatment system combining ozone catalytic oxidation technology and self-cleaning ceramic membrane technology.
为达到上述目的，本发明通过以下技术方案来具体实现：In order to achieve the above object, the present invention is specifically realized through the following technical solutions:
一种臭氧催化氧化自清洁陶瓷膜水处理装置，包括气液混合输送装置、陶瓷膜过滤器，所述气液混合输送装置与臭氧投加口连接，所述气液混合输送装置通过进水管路将溶解有臭氧的水体从底部通入所述陶瓷膜过滤器的底部，所述陶瓷膜过滤器的内部设有若干个竖直布置的陶瓷膜管，所述进水管路与所述陶瓷膜管相通，并且所述陶瓷膜过滤器的顶端封闭，在所述陶瓷膜过滤器的侧壁上开有出水口，供过滤后清水引出。An ozone catalytic oxidation self-cleaning ceramic membrane water treatment device, comprising a gas-liquid mixing delivery device and a ceramic membrane filter, the gas-liquid mixing delivery device is connected to an ozone dosing port, and the gas-liquid mixing delivery device passes through a water inlet pipeline Pass the ozone-dissolved water body into the bottom of the ceramic membrane filter from the bottom, the inside of the ceramic membrane filter is provided with several vertically arranged ceramic membrane tubes, the water inlet pipeline and the ceramic membrane tube connected, and the top of the ceramic membrane filter is closed, and a water outlet is opened on the side wall of the ceramic membrane filter for the filtered clear water to be drawn out.
所述陶瓷膜管的管壁密布微孔，在压力作用下，混合臭氧的进水在外压的作用下，经陶瓷膜管上的微孔渗透到过滤室，经出水口引出。经过陶瓷膜过滤，水中大部分的悬浮物和油分子基本被除去。The tube wall of the ceramic membrane tube is densely covered with micropores. Under the action of pressure, the incoming water mixed with ozone penetrates into the filter chamber through the micropores on the ceramic membrane tube under the action of external pressure, and is led out through the water outlet. After being filtered by ceramic membrane, most of the suspended solids and oil molecules in the water are basically removed.
所述气液混合输送装置优选为气液混合泵。The gas-liquid mixing delivery device is preferably a gas-liquid mixing pump.
优选的，在所述陶瓷膜管的管壁上涂覆有臭氧催化剂，所述臭氧催化剂优选钛锰或者钛铈，在水流作用下，臭氧催化剂可以与水中的臭氧发生催化氧化反应，分解一部分附着在陶瓷膜管上的杂质，减缓膜污染。Preferably, an ozone catalyst is coated on the tube wall of the ceramic membrane tube, and the ozone catalyst is preferably titanium manganese or titanium cerium. Under the action of water flow, the ozone catalyst can undergo a catalytic oxidation reaction with the ozone in the water to decompose a part of the attached Impurities on ceramic membrane tubes slow down membrane fouling.
在所述陶瓷膜过滤器的进水管路上设有压力表，用以检测进水压力，当进水口的压差增大到设定值，进行反冲洗，以保证陶瓷膜过滤器的过滤效果。A pressure gauge is provided on the water inlet pipeline of the ceramic membrane filter to detect the water inlet pressure. When the pressure difference at the water inlet increases to a set value, backwashing is performed to ensure the filtering effect of the ceramic membrane filter.
进一步的，所述臭氧催化氧化自清洁陶瓷膜水处理装置，还包括反冲洗系统，所述反冲洗系统包括储水罐和反冲洗水泵，所述储水罐的进水口与所述陶瓷膜过滤器的出水口连接，所述储水罐的出水口通过所述反冲洗水泵与所述陶瓷膜过滤器上的反冲洗进水口连接。Further, the ozone catalytic oxidation self-cleaning ceramic membrane water treatment device also includes a backwash system, the backwash system includes a water storage tank and a backwash water pump, the water inlet of the water storage tank is connected to the ceramic membrane filter The water outlet of the water storage tank is connected to the backwash water inlet on the ceramic membrane filter through the backwash water pump.
所述反冲洗进水口位于所述陶瓷膜过滤器的中部或下部。The backwash water inlet is located at the middle or lower part of the ceramic membrane filter.
进一步的，所述臭氧催化氧化自清洁陶瓷膜水处理装置，还包括回流循环系统，所述回流循环系统包括粗过滤器和缓冲池，所述粗过滤器的入口与二级沉降池的出水口连接，所述粗过滤器的出口与所述缓冲池的入口连接，所述缓冲池的出口与所述气液混合输送装置的进水口连接，在所述陶瓷膜过滤器的侧壁上设有回流口，所述回流口通过循环管路与所述粗过滤器的入口或所述缓冲池的入口连通，并且在循环管路上设有调压阀。Further, the ozone catalytic oxidation self-cleaning ceramic membrane water treatment device also includes a backflow circulation system, the backflow circulation system includes a coarse filter and a buffer tank, the inlet of the coarse filter and the outlet of the secondary sedimentation tank connected, the outlet of the coarse filter is connected to the inlet of the buffer tank, the outlet of the buffer tank is connected to the water inlet of the gas-liquid mixing conveying device, and the side wall of the ceramic membrane filter is provided with A return port, the return port communicates with the inlet of the coarse filter or the inlet of the buffer pool through a circulation pipeline, and a pressure regulating valve is arranged on the circulation pipeline.
粗过滤器中的滤网可以拦阻掉水中的悬浮物、颗粒物等杂质，降低原水浊度，有效保护后端的陶瓷膜管。The filter screen in the coarse filter can block suspended solids, particles and other impurities in the water, reduce the turbidity of raw water, and effectively protect the ceramic membrane tube at the back end.
回流缓冲系统将陶瓷膜过滤器中一部分的水通过循环管路回流至前端缓冲池或粗过滤器中，增大系统流速，提高系统的处理效率。The backflow buffer system returns part of the water in the ceramic membrane filter to the front-end buffer pool or coarse filter through the circulation pipeline, increasing the system flow rate and improving the treatment efficiency of the system.
所述回流口的高度低于所述出水口的高度。The height of the return opening is lower than that of the water outlet.
更进一步的，所述反冲洗进水口的高度低于所述回流口的高度。Furthermore, the height of the backwash water inlet is lower than that of the return flow port.
所述循环管路上设有浓水排放口，用以将反冲洗后的浓水经由浓水排放口排出。A concentrated water discharge port is provided on the circulation pipeline to discharge the concentrated water after backwashing through the concentrated water discharge port.
一种臭氧催化氧化自清洁陶瓷膜水处理方法，通过气液混合输送装置将臭氧与水混合后送入陶瓷膜过滤器，混合臭氧的进水在外压的作用下，经陶瓷膜管上的微孔渗透到过滤室，经出水口引出。经过陶瓷膜过滤，水中大部分的悬浮物和油分子基本被除去；在水流作用下，部分杂质会附着在陶瓷膜过滤管表面，所述陶瓷膜管的管壁涂覆有臭氧催化剂，可以与水中的臭氧发生催化氧化反应，分解一部分附着在陶瓷膜管上的杂质，减缓膜污染。An ozone catalytic oxidation self-cleaning ceramic membrane water treatment method, the ozone and water are mixed through a gas-liquid mixing delivery device and then sent to a ceramic membrane filter, and the influent water mixed with ozone passes through the micro The holes penetrate into the filter chamber and are drawn out through the water outlet. After being filtered by ceramic membrane, most of the suspended solids and oil molecules in the water are basically removed; under the action of water flow, some impurities will adhere to the surface of the ceramic membrane filter tube, and the wall of the ceramic membrane tube is coated with an ozone catalyst, which can be used with The ozone in the water undergoes a catalytic oxidation reaction to decompose a part of the impurities attached to the ceramic membrane tube and slow down the membrane fouling.
通过溶胶—凝胶加浸渍—提拉的方法在商业陶瓷膜上涂敷臭氧催化剂，使陶瓷膜兼具臭氧催化氧化和“自清洁”功能，有效减缓污染物在膜表面积累和堵塞，一方面降低膜污染，另一方面提高陶瓷膜管强度和膜过滤通量，同时对低浓度有机污染物有一定的去除效果。The commercial ceramic membrane is coated with an ozone catalyst by the method of sol-gel plus impregnation-lifting, so that the ceramic membrane has both ozone catalytic oxidation and "self-cleaning" functions, effectively slowing down the accumulation and clogging of pollutants on the membrane surface. On the one hand Reduce membrane pollution, on the other hand, improve the strength of ceramic membrane tubes and membrane filtration flux, and at the same time have a certain removal effect on low-concentration organic pollutants.
本发明的陶瓷膜过滤器采用模块化结构，每个模块包含一组管状或多通道的洁陶瓷膜管，模块之间通过并联方式连接，根据实际水量灵活设置。The ceramic membrane filter of the present invention adopts a modular structure, and each module includes a group of tubular or multi-channel clean ceramic membrane tubes, and the modules are connected in parallel and flexibly set according to the actual water volume.
本发明所述臭氧通过气液混合泵与进水充分接触，保证臭氧的利用效率。The ozone described in the present invention fully contacts the incoming water through the gas-liquid mixing pump, so as to ensure the utilization efficiency of the ozone.
附图说明Description of drawings
下面根据附图和实施例对本发明作进一步详细说明。The present invention will be described in further detail below according to the drawings and embodiments.
图1为本发明的结构图。Fig. 1 is a structural diagram of the present invention.
图2是陶瓷膜过滤器的截面图。Fig. 2 is a cross-sectional view of a ceramic membrane filter.
图中：1、气液混合输送装置；2、陶瓷膜过滤器；3、陶瓷膜管；4、臭氧投加口；5、11、进水管路；12、出水口；13、压力表；14、反冲洗进水口；15、回流口；21、储水罐；22、反冲洗水泵；31、粗过滤器；32、缓冲池；33、提升泵；34、循环管路；35、调压阀；36、浓水排放口。In the figure: 1. Gas-liquid mixing conveying device; 2. Ceramic membrane filter; 3. Ceramic membrane tube; 4. Ozone dosing port; 5. 11. Water inlet pipeline; 12. Water outlet; 13. Pressure gauge; 14 , backwash water inlet; 15, backflow port; 21, water storage tank; 22, backwash water pump; 31, coarse filter; 32, buffer tank; 33, lift pump; 34, circulation pipeline; 35, pressure regulating valve ; 36, Concentrated water discharge port.
具体实施方式Detailed ways
如图1-2所示，本实施例中所述一种臭氧催化氧化自清洁陶瓷膜水处理装置，包括气液混合输送装置1、陶瓷膜过滤器2，所述气液混合输送装置1与臭氧投加口4连接，所述气液混合输送装置1通过进水管路11将溶解有臭氧的水体从底部通入所述陶瓷膜过滤器2的底部，所述陶瓷膜过滤器2的内部设有若干个竖直布置的陶瓷膜管3，所述进水管路11与所述陶瓷膜管3相通，并且所述陶瓷膜过滤器2的顶端封闭，在所述陶瓷膜过滤器2的侧壁上开有出水口12，供过滤后的清水引出。As shown in Figure 1-2, the ozone catalytic oxidation self-cleaning ceramic membrane water treatment device described in this embodiment includes a gas-liquid mixing delivery device 1 and a ceramic membrane filter 2, and the gas-liquid mixing delivery device 1 and The ozone dosing port 4 is connected, and the gas-liquid mixing delivery device 1 passes the water body dissolved with ozone into the bottom of the ceramic membrane filter 2 from the bottom through the water inlet pipeline 11, and the interior of the ceramic membrane filter 2 is provided with There are several vertically arranged ceramic membrane tubes 3, the water inlet pipeline 11 communicates with the ceramic membrane tubes 3, and the top of the ceramic membrane filter 2 is closed, and on the side wall of the ceramic membrane filter 2 A water outlet 12 is provided on the top for the filtered clear water to be drawn out.
所述陶瓷膜管3的管壁密布微孔，在压力作用下，混合臭氧的进水在外压的作用下，经陶瓷膜管上的微孔渗透到过滤室，经出水口引出。经过陶瓷膜过滤，水中大部分的悬浮物和油分子基本被除去。The tube wall of the ceramic membrane tube 3 is densely covered with micropores. Under the action of pressure, the incoming water mixed with ozone penetrates into the filter chamber through the micropores on the ceramic membrane tube under the action of external pressure, and is drawn out through the water outlet. After being filtered by ceramic membrane, most of the suspended solids and oil molecules in the water are basically removed.
所述气液混合输送装置1优选为气液混合泵。The gas-liquid mixing and conveying device 1 is preferably a gas-liquid mixing pump.
优选的，在所述陶瓷膜管3的管壁上涂覆有臭氧催化剂，所述臭氧催化剂优选钛锰或者钛铈，在水流作用下，臭氧催化剂可以与水中的臭氧发生催化氧化反应，分解一部分附着在陶瓷膜管上的杂质，减缓膜污染。Preferably, the tube wall of the ceramic membrane tube 3 is coated with an ozone catalyst, the ozone catalyst is preferably titanium manganese or titanium cerium, and under the action of water flow, the ozone catalyst can undergo a catalytic oxidation reaction with the ozone in the water to decompose a part Impurities attached to ceramic membrane tubes slow down membrane fouling.
在所述陶瓷膜过滤器的进水管路上设有压力表13，用以检测进水压力，当进水口的压差增大到设定值，进行反冲洗，以保证陶瓷膜过滤器的过滤效果。A pressure gauge 13 is provided on the water inlet pipeline of the ceramic membrane filter to detect the water inlet pressure, and when the pressure difference at the water inlet increases to a set value, backwashing is performed to ensure the filtering effect of the ceramic membrane filter .
进一步的，所述臭氧催化氧化自清洁陶瓷膜水处理装置，还包括反冲洗系统，所述反冲洗系统包括储水罐21和反冲洗水泵22，所述储水罐21的进水口与所述陶瓷膜过滤器的出水口12连接，所述储水罐21的出水口通过所述反冲洗水泵22与所述陶瓷膜过滤器2上的反冲洗进水口14连接。Further, the ozone catalytic oxidation self-cleaning ceramic membrane water treatment device also includes a backwash system, the backwash system includes a water storage tank 21 and a backwash water pump 22, the water inlet of the water storage tank 21 is connected to the The water outlet 12 of the ceramic membrane filter is connected, and the water outlet of the water storage tank 21 is connected with the backwash water inlet 14 on the ceramic membrane filter 2 through the backwash water pump 22 .
所述反冲洗进水口位于所述陶瓷膜过滤器的中部或下部。The backwash water inlet is located at the middle or lower part of the ceramic membrane filter.
进一步的，所述臭氧催化氧化自清洁陶瓷膜水处理装置，还包括回流循环系统，所述回流循环系统包括粗过滤器31和缓冲池32，所述粗过滤器31的入口与二沉池的出水口连接，并在出水口处设有提升泵33，所述粗过滤器31的出口与所述缓冲池32的入口连接，所述缓冲池32的出口与所述气液混合输送装置1的进水口连接，在所述陶瓷膜过滤器2的侧壁上设有回流口15，所述回流口15通过循环管路34与所述粗过滤器31的入口或所述缓冲池32的入口连通，并且在循环管路上设有调压阀35。Further, the ozone catalytic oxidation self-cleaning ceramic membrane water treatment device also includes a backflow circulation system, and the backflow circulation system includes a coarse filter 31 and a buffer tank 32, and the inlet of the coarse filter 31 is connected to the secondary sedimentation tank. The water outlet is connected, and a lift pump 33 is provided at the water outlet, the outlet of the coarse filter 31 is connected with the inlet of the buffer tank 32, and the outlet of the buffer tank 32 is connected with the gas-liquid mixing delivery device 1 The water inlet is connected, and the side wall of the ceramic membrane filter 2 is provided with a return port 15, and the return port 15 communicates with the inlet of the coarse filter 31 or the inlet of the buffer pool 32 through a circulation pipeline 34 , and a pressure regulating valve 35 is provided on the circulation pipeline.
粗过滤器31中的滤网可以拦阻掉水中的悬浮物、颗粒物等杂质，降低原水浊度，有效保护后端的陶瓷膜管。The filter screen in the coarse filter 31 can block impurities such as suspended solids and particles in the water, reduce the turbidity of raw water, and effectively protect the ceramic membrane tube at the rear end.
回流缓冲系统将陶瓷膜过滤器2中一部分的水通过循环管路回流至前端缓冲池或粗过滤器中，增大系统流速，提高系统的处理效率。The backflow buffer system returns part of the water in the ceramic membrane filter 2 to the front-end buffer pool or coarse filter through the circulation pipeline, increasing the system flow rate and improving the treatment efficiency of the system.
所述回流口15的高度低于所述出水口12的高度。The height of the return opening 15 is lower than that of the water outlet 12 .
更进一步的，所述反冲洗进水口14的高度低于所述回流口15的高度。Furthermore, the height of the backwash water inlet 14 is lower than the height of the return flow port 15 .
所述循环管路上设有浓水排放口36，用以将反冲洗后的浓水经由浓水排放口排出。A concentrated water discharge port 36 is provided on the circulation pipeline for discharging the concentrated water after backwashing through the concentrated water discharge port.
一种臭氧催化氧化自清洁陶瓷膜水处理方法，通过气液混合输送装置将臭氧与水混合后送入陶瓷膜过滤器，混合臭氧的进水在外压的作用下，经陶瓷膜管上的微孔渗透到过滤室，经出水口引出。经过陶瓷膜过滤，水中大部分的悬浮物和油分子基本被除去；在水流作用下，部分杂质会附着在陶瓷膜过滤管表面，所述陶瓷膜管的管壁涂覆有臭氧催化剂，可以与水中的臭氧发生催化氧化反应，分解一部分附着在陶瓷膜管上的杂质，减缓膜污染。An ozone catalytic oxidation self-cleaning ceramic membrane water treatment method, the ozone and water are mixed through a gas-liquid mixing delivery device and then sent to a ceramic membrane filter, and the influent water mixed with ozone passes through the micro The holes penetrate into the filter chamber and are drawn out through the water outlet. After being filtered by ceramic membrane, most of the suspended solids and oil molecules in the water are basically removed; under the action of water flow, some impurities will adhere to the surface of the ceramic membrane filter tube, and the wall of the ceramic membrane tube is coated with an ozone catalyst, which can be used with The ozone in the water undergoes a catalytic oxidation reaction to decompose a part of the impurities attached to the ceramic membrane tube and slow down the membrane fouling.
通过溶胶—凝胶加浸渍—提拉的方法在商业陶瓷膜上涂敷臭氧催化剂，使陶瓷膜兼具臭氧催化氧化和“自清洁”功能，有效减缓污染物在膜表面积累和堵塞，一方面降低膜污染，另一方面提高陶瓷膜管强度和膜过滤通量，同时对低浓度有机污染物有一定的去除效果。The commercial ceramic membrane is coated with an ozone catalyst by the method of sol-gel plus impregnation-lifting, so that the ceramic membrane has both ozone catalytic oxidation and "self-cleaning" functions, effectively slowing down the accumulation and clogging of pollutants on the membrane surface. On the one hand Reduce membrane pollution, on the other hand, improve the strength of ceramic membrane tubes and membrane filtration flux, and at the same time have a certain removal effect on low-concentration organic pollutants.
本发明的陶瓷膜过滤器采用模块化结构，每个模块包含一组管状或多通道的洁陶瓷膜管，模块之间通过并联方式连接，根据实际水量灵活设置。The ceramic membrane filter of the present invention adopts a modular structure, and each module includes a group of tubular or multi-channel clean ceramic membrane tubes, and the modules are connected in parallel and flexibly set according to the actual water volume.
本发明所述臭氧通过气液混合泵与进水充分接触，保证臭氧的利用效率。The ozone described in the present invention fully contacts the incoming water through the gas-liquid mixing pump, so as to ensure the utilization efficiency of the ozone.
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| CN113318608A (en) * | 2021-05-17 | 2021-08-31 | 浙江理工大学 | Dynamically catalyzed water treatment ceramic membrane and application thereof |
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| CN113880229A (en) * | 2021-09-28 | 2022-01-04 | 中铁第一勘察设计院集团有限公司 | System for treating oily wastewater by using flat ceramic membrane |
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