CN105621829B - A kind of heavy metals removal device of agricultural sludge - Google Patents
A kind of heavy metals removal device of agricultural sludge Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims abstract description 104
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 24
- 239000004576 sand Substances 0.000 claims abstract description 108
- 238000001179 sorption measurement Methods 0.000 claims abstract description 105
- 238000005345 coagulation Methods 0.000 claims abstract description 99
- 230000015271 coagulation Effects 0.000 claims abstract description 99
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000004062 sedimentation Methods 0.000 claims abstract description 40
- 230000003647 oxidation Effects 0.000 claims abstract description 37
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 37
- 230000020477 pH reduction Effects 0.000 claims abstract description 37
- 238000005406 washing Methods 0.000 claims abstract description 36
- 238000002156 mixing Methods 0.000 claims abstract description 32
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000003463 adsorbent Substances 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000701 coagulant Substances 0.000 claims abstract description 14
- 239000004094 surface-active agent Substances 0.000 claims abstract description 14
- 239000013049 sediment Substances 0.000 claims abstract description 13
- 239000002351 wastewater Substances 0.000 claims description 38
- 238000003756 stirring Methods 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 239000012141 concentrate Substances 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 241000605272 Acidithiobacillus thiooxidans Species 0.000 claims description 3
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 3
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 claims 1
- 231100000719 pollutant Toxicity 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 238000007873 sieving Methods 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical group Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000605118 Thiobacillus Species 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
- 230000009467 reduction Effects 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
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- 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
-
- 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
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal 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 Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
- Water Treatment By Sorption (AREA)
Abstract
本发明涉及一种农用污泥的重金属去除装置，包括酸化池、氧化浓缩池、吸附混凝池和流砂滤池；酸化池设置有酸化池入口和酸化池出口，酸化池入口处设有污泥回流管，酸化池的上部设置有硫粉和表面活性剂添加与计量系统；氧化浓缩池包括混合室和浓缩室，混合室的中上部设置有铁粉和过氧化氢添加与计量系统，混合室的下部设置有混合室搅拌器；吸附混凝池包括吸附区、混凝区和沉淀区，吸附区的上部设置有吸附剂添加计量系统，混凝区的中上部设置有混凝剂添加计量系统，沉淀区的出口上部设有吸附混凝池溢水堰，沉淀区底部设计成锥形结构，在锥形结构底部设置有沉淀物排放阀；流砂滤池包括布水区、洗砂区和砂滤区。
The invention relates to a heavy metal removal device for agricultural sludge, comprising an acidification tank, an oxidation concentration tank, an adsorption coagulation tank and a quicksand filter tank; The return pipe, the upper part of the acidification tank is equipped with sulfur powder and surfactant addition and metering system; the oxidation concentration tank includes a mixing chamber and a concentration chamber, the middle and upper part of the mixing chamber is equipped with iron powder and hydrogen peroxide addition and metering system, the mixing chamber The lower part is equipped with a mixing chamber agitator; the adsorption coagulation pool includes an adsorption area, a coagulation area and a sedimentation area, the upper part of the adsorption area is equipped with an adsorbent addition metering system, and the middle and upper part of the coagulation area is equipped with a coagulant addition metering system , the upper part of the outlet of the sedimentation area is provided with an adsorption coagulation tank overflow weir, the bottom of the sedimentation area is designed as a conical structure, and a sediment discharge valve is set at the bottom of the conical structure; the quicksand filter includes a water distribution area, a sand washing area and a sand filter. Area.
Description
技术领域technical field
本发明涉及环保技术领域，具体涉及一种农用污泥的重金属去除装置。The invention relates to the technical field of environmental protection, in particular to a heavy metal removal device for agricultural sludge.
背景技术Background technique
剩余污泥是城市生活污水处理厂的副产物，剩余污泥庞大的体积、复杂的成分制约着污泥资源化和减量化。由于污泥具有易得性、营养性和廉价性等特点，污泥进行土地利用是被公认的最佳处理方案之一。但是剩余污泥在处理中经过的各种各样的物理化学过程，以及生活污水源头累积的重金属最终都进入了剩余污泥中，这就限制了污泥的土地利用。在一定条件下，污泥中的重金属可能释放到上覆水体中然后被生物摄入体内，危害水生生物和人体健康。重金属排放到环境中会造成污染，因此污泥土地利用的关键问题就是去除其中的重金属。Surplus sludge is a by-product of urban domestic sewage treatment plants. The huge volume and complex composition of surplus sludge restrict the resource utilization and reduction of sludge. Due to the characteristics of easy availability, nutrition and cheapness of sludge, land use of sludge is recognized as one of the best treatment options. However, various physical and chemical processes in the treatment of excess sludge, as well as heavy metals accumulated in the source of domestic sewage, eventually enter the excess sludge, which limits the land use of sludge. Under certain conditions, heavy metals in sludge may be released into the overlying water body and then ingested by organisms, endangering aquatic organisms and human health. The discharge of heavy metals into the environment will cause pollution, so the key issue of sludge land use is to remove heavy metals.
生物淋滤法是去除污泥中的重金属较为有效的方法，生物淋滤法具有很多优点，但是硫杆菌增殖慢、生物淋滤滞留时间长等一些缺点限制了这种方法的大规模应用。因此需要寻找一种新的处理污泥中重金属的方法，或对现有的生物淋滤法进行优化提高污泥处理过程中的限速步骤的反应速率，力争寻找到一种可以高效去除重金属、时间短、且有望大规模推广的方法与装置。Bioleaching is an effective method to remove heavy metals in sludge. Bioleaching has many advantages, but some disadvantages such as slow growth of Thiobacillus and long retention time of bioleaching limit the large-scale application of this method. Therefore, it is necessary to find a new method for treating heavy metals in sludge, or optimize the existing bioleaching method to increase the reaction rate of the rate-limiting step in the sludge treatment process, and strive to find a method that can efficiently remove heavy metals, The method and device are short in time and are expected to be popularized on a large scale.
发明内容Contents of the invention
本发明要解决的技术问题是：为了解决上述污泥中重金属的去除问题，本发明提供一种农用污泥的重金属去除装置。The technical problem to be solved by the present invention is: in order to solve the problem of removing heavy metals in the above sludge, the present invention provides a heavy metal removal device for agricultural sludge.
本发明解决其技术问题所采用的技术方案是：一种农用污泥的重金属去除装置，包括酸化池、氧化浓缩池、吸附混凝池和流砂滤池。The technical solution adopted by the present invention to solve the technical problem is: a heavy metal removal device for agricultural sludge, including an acidification tank, an oxidation concentration tank, an adsorption coagulation tank and a quicksand filter tank.
所述的酸化池设置有酸化池入口和酸化池出口，酸化池入口处设有污泥回流管；酸化池的上部设置有硫粉和表面活性剂添加与计量系统，表面活性剂为tween-60；酸化池的中部设置有酸化池折流板；酸化池的下部设置有酸化池搅拌器，酸化池出口下部设有pH值计量器。The acidizing tank is provided with an acidizing tank inlet and an acidizing tank outlet, and a sludge return pipe is arranged at the acidizing tank inlet; a sulfur powder and surfactant addition and metering system are arranged on the acidizing tank, and the surfactant is tween-60 ; The middle part of the acidification tank is provided with an acidification tank baffle;
酸化池出口连接氧化浓缩池入口。The outlet of the acidification pool is connected to the inlet of the oxidation concentration pool.
所述的氧化浓缩池包括混合室和浓缩室，混合室的上部设置有氧化浓缩池入口，混合室的中上部设置有铁粉和过氧化氢添加与计量系统，混合室的下部设置有混合室搅拌器；所述的混合室和浓缩室之间设有氧化浓缩池挡流板，氧化浓缩池挡流板的下部设置有45度的转角，转角转向浓缩室一侧。浓缩室的上部设有浓缩液溢流堰，浓缩液溢流堰连接吸附混凝池进水管。浓缩室的底部设计成锥形结构，在锥形结构底部设置有氧化浓缩池污泥排放阀，氧化浓缩池污泥排放阀连接污泥回流管和污泥排放管，污泥排放管连通污泥脱水车间。The oxidation concentration pool includes a mixing chamber and a concentration chamber, the upper part of the mixing chamber is provided with the inlet of the oxidation concentration pool, the middle and upper part of the mixing chamber is provided with iron powder and hydrogen peroxide adding and metering system, and the lower part of the mixing chamber is provided with a mixing chamber Agitator; an oxidation concentration pool baffle is provided between the mixing chamber and the concentration chamber, and the lower part of the oxidation concentration pool baffle is provided with a 45-degree corner, and the corner turns to one side of the concentration chamber. The upper part of the concentration chamber is provided with a concentrate overflow weir, and the concentrate overflow weir is connected to the water inlet pipe of the adsorption coagulation tank. The bottom of the concentration chamber is designed as a conical structure, and the sludge discharge valve of the oxidation concentration tank is arranged at the bottom of the conical structure. The sludge discharge valve of the oxidation concentration tank is connected to the sludge return pipe and the sludge discharge pipe, and the sludge discharge pipe is connected to the sludge Dehydration workshop.
所述的吸附混凝池包括吸附区、混凝区和沉淀区。所述的吸附区的中上部设置有吸附混凝池进水管，吸附区的上部设置有吸附剂添加计量系统；吸附区的中部设置有吸附区搅拌器，吸附区的下部设有倾斜的底板，吸附反应后的废水沿倾斜的底板流入混凝区的中下部。The adsorption coagulation pool includes an adsorption area, a coagulation area and a sedimentation area. The upper middle part of the adsorption area is provided with an adsorption coagulation pool inlet pipe, the upper part of the adsorption area is provided with an adsorbent addition metering system; the middle part of the adsorption area is provided with an adsorption area agitator, and the lower part of the adsorption area is provided with an inclined bottom plate The wastewater after the adsorption reaction flows into the middle and lower part of the coagulation zone along the inclined bottom plate.
吸附剂的制备过程为：The preparation process of the adsorbent is as follows:
①把粉煤灰、粘土和碳酸钙分别粉碎、过筛，按质量比4:3:3混合搅拌；① Pulverize and sieve the fly ash, clay and calcium carbonate respectively, and mix and stir according to the mass ratio of 4:3:3;
②把搅拌混合后的混合物与水按质量比4：6混合搅拌均匀，自然风干，粉碎、过筛；②Mix the mixed mixture with water according to the mass ratio of 4:6, mix evenly, air dry naturally, pulverize and sieve;
③把筛分后的混合物在800～1200℃下煅烧60～100分钟；③ Calcining the sieved mixture at 800-1200°C for 60-100 minutes;
④把煅烧物冷却、粉碎、筛分，制得吸附剂。④Cool the calcined product, crush it, and sieve it to obtain the adsorbent.
所述的吸附区和混凝区之间设有吸附混凝池挡流板，吸附混凝池挡流板的下部设置有45度的转角，转角转向吸附区一侧。混凝区的中上部设置有混凝剂添加计量系统，所述的混凝剂为氯化铁或硫酸铁溶液。混凝区下部设置有混凝区搅拌装置。An adsorption coagulation pool baffle is provided between the adsorption area and the coagulation area, and the lower part of the adsorption coagulation pool baffle is provided with a 45-degree corner, which turns to the side of the adsorption area. The middle and upper part of the coagulation area is provided with a coagulant adding metering system, and the coagulant is ferric chloride or ferric sulfate solution. The lower part of the coagulation zone is provided with a stirring device in the coagulation zone.
所述混凝区和沉淀区之间设有隔板，该隔板与吸附混凝池的内壁形成作为废水进入沉淀区的废水流道，沉淀区的出口处设有吸附混凝池三相分离器，沉淀区的出口上部设有吸附混凝池溢水堰，沉淀区底部设计成锥形结构，在锥形结构底部设置有沉淀物排放阀。吸附混凝池溢水堰连接吸附混凝池出水管，吸附混凝池出水管连接流砂滤池进水管。A partition is provided between the coagulation zone and the sedimentation zone, and the partition and the inner wall of the adsorption coagulation tank form a waste water flow channel that enters the sedimentation zone as wastewater, and an adsorption coagulation tank is provided at the outlet of the precipitation zone for three-phase separation. The upper part of the outlet of the sedimentation area is equipped with an adsorption coagulation tank overflow weir, the bottom of the sedimentation area is designed as a conical structure, and a sediment discharge valve is installed at the bottom of the conical structure. The overflow weir of the adsorption coagulation tank is connected to the outlet pipe of the adsorption coagulation tank, and the outlet pipe of the adsorption coagulation tank is connected to the water inlet pipe of the quicksand filter.
所述流砂滤池包括流砂滤池进水管和用于排出处理后水的流砂滤池出水管，所述的流砂滤池包括布水区、洗砂区和砂滤区；所述的布水区位于流砂滤池的下部，布水区设有流砂滤池布水管，流砂滤池布水管连接流砂滤池进水管，为了废水处理的效果更好，所述的流砂滤池布水管设置成同心圆形状，流砂滤池布水管上具有向下辐射出水口；所述的洗砂区位于流砂滤池的中心，为圆柱形筒状结构，圆柱形筒状结构下端开口位于流砂滤池的最底部，圆柱形筒状结构上端开口位于流砂滤池的上部，洗砂区的中部设有气提管，气提管连接流砂滤池外的流砂滤池鼓风机，洗砂区的上部设有砂水沉淀分离区，砂水沉淀分离区的上部设有洗砂区溢水堰，洗砂区溢水堰连接洗砂水排放管，砂水沉淀分离区的下部设有回砂通道；所述的砂滤区位于洗砂区的外围，砂滤区内充填有细砂，砂滤区上部设有砂滤区溢水堰，砂滤区溢水堰连接流砂滤池出水管，流砂滤池过滤处理后的水达标排放。The quicksand filter includes a quicksand filter inlet pipe and a quicksand filter outlet pipe for discharging treated water, and the quicksand filter includes a water distribution area, a sand washing area and a sand filter area; the water distribution area Located at the lower part of the quicksand filter, the water distribution area is provided with a quicksand filter water distribution pipe, and the quicksand filter water distribution pipe is connected to the quicksand filter water inlet pipe. In order to achieve a better wastewater treatment effect, the quicksand filter water distribution pipes are arranged in concentric circles Shape, the water distribution pipe of the quicksand filter has a downward radiating water outlet; the sand washing area is located in the center of the quicksand filter, and is a cylindrical cylindrical structure, and the lower end opening of the cylindrical cylindrical structure is located at the bottom of the quicksand filter. The upper opening of the cylindrical cylindrical structure is located on the upper part of the quicksand filter, and the middle part of the sand washing area is equipped with an air lift pipe, which is connected to the quick sand filter blower outside the quick sand filter, and the upper part of the sand washing area is equipped with sand and water sedimentation and separation The upper part of the sand-water sedimentation separation area is provided with an overflow weir in the sand washing area, the overflow weir in the sand washing area is connected to the sand washing water discharge pipe, and the lower part of the sand-water sedimentation separation area is provided with a sand return channel; the sand filter area is located in the washing area On the periphery of the sand area, the sand filter area is filled with fine sand, and the upper part of the sand filter area is provided with an overflow weir of the sand filter area. The overflow weir of the sand filter area is connected to the outlet pipe of the quicksand filter.
一种采用上述农用污泥的重金属去除装置进行操作的方法，具有如下步骤：A kind of method that adopts the heavy metal removal device of above-mentioned agricultural sludge to operate, has the following steps:
①来自二沉池的剩余污泥和来自污泥回流管的污泥混合后从酸化池入口进入酸化池，硫粉和表面活性剂添加与计量系统添加硫粉和表面活性剂，酸化池搅拌器对污泥进行搅拌混合，污泥中的氧化硫硫杆菌氧化硫粉并获得能量，同时pH降低，硫酸盐含量升高。然后污泥通过酸化池出口和氧化浓缩池入口进入混合室，铁粉和过氧化氢添加与计量系统添加铁粉和过氧化氢，铁粉和过氧化氢形成的Fenton剂对污泥进行氧化，混合室搅拌器对污泥进行搅拌混合，污泥中的重金属进一步溶出，然后污泥进入浓缩室，浓缩室的上清液通过浓缩液溢流堰流入吸附混凝池进水管，浓缩后的污泥通过氧化浓缩池污泥排放阀排出，一部分浓缩污泥进入污泥回流管，一部分浓缩污泥通过污泥排放管进入污泥脱水车间，脱水后的污泥农用。① After mixing the remaining sludge from the secondary settling tank and the sludge from the sludge return pipe, it enters the acidizing tank from the inlet of the acidizing tank, sulfur powder and surfactant are added and the metering system adds sulfur powder and surfactant, and the acidizing tank agitator The sludge is stirred and mixed, and Thiobacillus thiooxidans in the sludge oxidizes the sulfur powder and obtains energy, while the pH decreases and the sulfate content increases. Then the sludge enters the mixing chamber through the outlet of the acidification tank and the inlet of the oxidation concentration tank. The iron powder and hydrogen peroxide are added and the metering system adds iron powder and hydrogen peroxide. The Fenton agent formed by the iron powder and hydrogen peroxide oxidizes the sludge. The agitator in the mixing chamber stirs and mixes the sludge, and the heavy metals in the sludge are further dissolved, and then the sludge enters the concentration chamber, and the supernatant of the concentration chamber flows into the inlet pipe of the adsorption coagulation tank through the concentrate overflow weir, and the concentrated sewage The sludge is discharged through the sludge discharge valve of the oxidation concentration tank, part of the concentrated sludge enters the sludge return pipe, and part of the concentrated sludge enters the sludge dehydration workshop through the sludge discharge pipe, and the dehydrated sludge is used for agriculture.
②浓缩室的上清液形成的废水通过吸附混凝池进水管进入吸附区，吸附剂添加计量系统添加吸附剂，吸附区搅拌器对废水进行搅拌混合，废水中的重金属离子被吸附剂吸附和吸收。废水通过吸附区下部设有的倾斜底板和挡流板之间的空隙进入混凝区，与来自混凝剂添加计量系统的混凝剂溶液混合，利用设置在混凝区底部的混凝区搅拌装置进行搅拌。然后废水进入沉淀区，吸附混凝池三相分离器实现废水和固体的分离，沉淀物在重力的作用下下沉到沉淀区的下部，通过底部的沉淀物排放阀排出，沉淀后的废水通过吸附混凝池溢水堰和吸附混凝池出水管进入流砂滤池。②Wastewater formed from the supernatant of the concentration chamber enters the adsorption area through the inlet pipe of the adsorption coagulation tank, the adsorbent adding metering system adds the adsorbent, and the agitator in the adsorption area stirs and mixes the wastewater, and the heavy metal ions in the wastewater are absorbed by the adsorbent and absorb. The waste water enters the coagulation area through the gap between the inclined bottom plate and the baffle at the lower part of the adsorption area, mixes with the coagulant solution from the coagulant addition metering system, and is stirred by the coagulation area at the bottom of the coagulation area. The device is stirred. Then the wastewater enters the sedimentation area, and the three-phase separator of the adsorption coagulation tank realizes the separation of wastewater and solids. The sediment sinks to the lower part of the sedimentation area under the action of gravity, and is discharged through the sediment discharge valve at the bottom. The sedimented wastewater passes through The overflow weir of the adsorption coagulation tank and the outlet pipe of the adsorption coagulation tank enter the quicksand filter tank.
③废水通过流砂滤池进水管、流砂滤池布水管进入流砂滤池的下部，流砂滤池布水管实现均匀布水，废水进入砂滤区，废水中的污染物被进一步过滤，然后废水穿过砂滤区由砂滤区溢水堰和流砂滤池出水管流出，达标排放；流砂滤池鼓风机产生的气流带动洗砂区中的砂和水向上流动，同时对砂进行冲洗，气流带动洗砂区中的砂和水进入砂水沉淀分离区，由于砂和水的比重不同，细砂沉淀下去并通过回砂通道流入砂滤区，实现砂滤区中的细砂不断从上往下的移动，砂水沉淀分离区中的水通过洗砂区溢水堰和洗砂水排放管排入市政污水处理系统。③Wastewater enters the lower part of the quicksand filter through the water inlet pipe of the quicksand filter and the water distribution pipe of the quicksand filter. The water distribution pipe of the quicksand filter realizes uniform water distribution, and the wastewater enters the sand filter area. The sand filter area flows out from the overflow weir of the sand filter area and the outlet pipe of the quick sand filter, and discharges up to the standard; the air flow generated by the blower of the quick sand filter drives the sand and water in the sand washing area to flow upwards, and at the same time washes the sand, and the air flow drives the sand washing area The sand and water in the sand enter the sand-water precipitation separation area. Due to the different specific gravity of sand and water, the fine sand settles down and flows into the sand filter area through the sand return channel, so that the fine sand in the sand filter area moves continuously from top to bottom. The water in the sand-water sedimentation and separation area is discharged into the municipal sewage treatment system through the overflow weir in the sand washing area and the sand washing water discharge pipe.
④吸附混凝池产生的沉淀物经脱水后外运。④ The sediment produced in the adsorption coagulation tank is dehydrated and then shipped out.
附图说明Description of drawings
下面结合附图和实施例对本发明进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
图1是本发明实施例酸化池的结构示意图。Fig. 1 is a structural schematic diagram of an acidification tank according to an embodiment of the present invention.
图1中：1.酸化池，1-1.酸化池入口，1-2.酸化池出口，1-3.污泥回流管，1-4.硫粉和表面活性剂添加与计量系统，1-5.酸化池折流板，1-6.酸化池搅拌器，1-7.pH值计量器。In Fig. 1: 1. Acidification tank, 1-1. Acidification tank inlet, 1-2. Acidification tank outlet, 1-3. Sludge return pipe, 1-4. Sulfur powder and surfactant addition and metering system, 1 -5. Acidification tank baffle plate, 1-6. Acidification tank agitator, 1-7. pH meter.
图2是本发明实施例氧化浓缩池的结构示意图。Fig. 2 is a schematic structural diagram of an oxidation concentration pool according to an embodiment of the present invention.
图2中：2.氧化浓缩池，2-1.混合室，2-2.浓缩室，2-3.氧化浓缩池入口，2-4.铁粉和过氧化氢添加与计量系统，2-5.混合室搅拌器，2-6.氧化浓缩池挡流板，2-7.浓缩液溢流堰，2-8.氧化浓缩池污泥排放阀。In Fig. 2: 2. Oxidation concentration pool, 2-1. Mixing chamber, 2-2. Concentration chamber, 2-3. Oxidation concentration pool inlet, 2-4. Iron powder and hydrogen peroxide addition and metering system, 2- 5. Agitator in mixing chamber, 2-6. Baffle plate in oxidation concentration tank, 2-7. Concentrate overflow weir, 2-8. Sludge discharge valve in oxidation concentration tank.
图3是本发明实施例吸附混凝池的结构示意图。Fig. 3 is a schematic structural diagram of an adsorption coagulation tank according to an embodiment of the present invention.
图3中：3.吸附混凝池，3-1.吸附区，3-2.混凝区，3-3.沉淀区，3-4.吸附混凝池进水管，3-5.吸附剂添加计量系统，3-6.吸附区搅拌器，3-7.底板，3-8.吸附混凝沉淀池挡流板，3-9.混凝剂添加计量系统，3-10.混凝区搅拌装置，3-11.隔板，3-12.吸附混凝池三相分离器，3-13.吸附混凝池溢水堰，3-14.沉淀物排放阀。Among Fig. 3: 3. adsorption coagulation tank, 3-1. adsorption zone, 3-2. coagulation zone, 3-3. sedimentation zone, 3-4. adsorption coagulation tank inlet pipe, 3-5. adsorbent Add metering system, 3-6. Stirrer in adsorption zone, 3-7. Bottom plate, 3-8. Adsorption coagulation sedimentation tank baffle, 3-9. Coagulant adding metering system, 3-10. Coagulation zone Stirring device, 3-11. partition, 3-12. three-phase separator of adsorption coagulation tank, 3-13. overflow weir of adsorption coagulation tank, 3-14. sediment discharge valve.
图4是本发明实施例流砂滤池的结构示意图。Fig. 4 is a schematic structural view of a quicksand filter according to an embodiment of the present invention.
图4中：4.流砂滤池，4-1.流砂滤池进水管，4-2.流砂滤池布水管，4-3.气提管，4-4.流砂滤池鼓风机，4-5.洗砂区溢水堰，4-6.回砂通道，4-7.砂滤区溢水堰。Among Fig. 4: 4. quicksand filter, 4-1. quicksand filter inlet pipe, 4-2. quicksand filter cloth water pipe, 4-3. gas lift pipe, 4-4. quicksand filter air blower, 4-5 . Sand washing area overflow weir, 4-6. Sand return channel, 4-7. Sand filter area overflow weir.
图5是本发明实施例的工艺流程图。Fig. 5 is a process flow diagram of an embodiment of the present invention.
具体实施方式Detailed ways
现在结合附图对本发明作进一步详细的说明。这些附图均为简化示意图，仅以示意方式说明本发明的基本结构，因此其仅显示与本发明有关的构成。The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.
实施例Example
如图1～图5所示，本发明一种农用污泥的重金属去除装置，包括酸化池1、氧化浓缩池2、吸附混凝池3和流砂滤池4。As shown in FIGS. 1 to 5 , a heavy metal removal device for agricultural sludge in the present invention includes an acidification tank 1 , an oxidation concentration tank 2 , an adsorption coagulation tank 3 and a quicksand filter tank 4 .
所述的酸化池1设置有酸化池入口1-1和酸化池出口1-2，酸化池入口处设有污泥回流管1-3；酸化池的上部设置有硫粉和表面活性剂添加与计量系统1-4，表面活性剂为tween-60；酸化池的中部设置有酸化池折流板1-5；酸化池的下部设置有酸化池搅拌器1-6，酸化池出口下部设有pH值计量器1-7。Described acidizing tank 1 is provided with acidizing tank inlet 1-1 and acidizing tank outlet 1-2, and acidizing tank inlet is provided with sludge return pipe 1-3; The top of acidizing tank is provided with sulfur powder and surfactant adding and Metering system 1-4, the surfactant is tween-60; acidification tank baffles 1-5 are set in the middle of the acidification tank; acidification tank agitators 1-6 are set in the lower part of the acidification tank, and pH Value Meters 1-7.
酸化池出口1-2连接氧化浓缩池入口2-3。The outlet 1-2 of the acidification pool is connected to the inlet 2-3 of the oxidation concentration pool.
所述的氧化浓缩池2包括混合室2-1和浓缩室2-2，混合室的上部设置有氧化浓缩池入口2-3，混合室的中上部设置有铁粉和过氧化氢添加与计量系统2-4，混合室的下部设置有混合室搅拌器2-5；所述的混合室和浓缩室之间设有氧化浓缩池挡流板2-6，氧化浓缩池挡流板的下部设置有45度的转角，转角转向浓缩室一侧。浓缩室的上部设有浓缩液溢流堰2-7，浓缩液溢流堰连接吸附混凝池进水管3-4。浓缩室的底部设计成锥形结构，在锥形结构底部设置有氧化浓缩池污泥排放阀2-8，氧化浓缩池污泥排放阀连接污泥回流管和污泥排放管，污泥排放管连通污泥脱水车间。The oxidation concentration pool 2 includes a mixing chamber 2-1 and a concentration chamber 2-2, the upper part of the mixing chamber is provided with an inlet 2-3 of the oxidation concentration pool, and the middle and upper part of the mixing chamber is provided with iron powder and hydrogen peroxide addition and metering System 2-4, the lower part of the mixing chamber is provided with a mixing chamber agitator 2-5; the oxidation concentration pool baffle plate 2-6 is arranged between the mixing chamber and the concentration chamber, and the lower part of the oxidation concentration pool baffle plate is set There is a 45-degree corner, and the corner turns to the side of the enrichment chamber. The upper part of the concentration chamber is provided with a concentrated liquid overflow weir 2-7, and the concentrated liquid overflow weir is connected to the water inlet pipe 3-4 of the adsorption coagulation tank. The bottom of the concentration chamber is designed as a conical structure, and the sludge discharge valve 2-8 of the oxidation concentration tank is arranged at the bottom of the conical structure. The sludge discharge valve of the oxidation concentration tank is connected to the sludge return pipe and the sludge discharge pipe, and the sludge discharge pipe It is connected to the sludge dehydration workshop.
所述的吸附混凝池3包括吸附区3-1、混凝区3-2和沉淀区3-3。所述的吸附区3-1的中上部设置有吸附混凝池进水管3-4，吸附区的上部设置有吸附剂添加计量系统3-5，吸附区的中部设置有吸附区搅拌器3-6；吸附区的下部设有倾斜的底板3-7，吸附反应后的废水沿倾斜的底板流入混凝区3-2的中下部。The adsorption coagulation tank 3 includes an adsorption zone 3-1, a coagulation zone 3-2 and a precipitation zone 3-3. The upper middle part of the adsorption zone 3-1 is provided with an adsorption coagulation pool inlet pipe 3-4, the upper part of the adsorption zone is provided with an adsorbent addition metering system 3-5, and the middle part of the adsorption zone is provided with an adsorption zone agitator 3- 6. The lower part of the adsorption area is provided with an inclined bottom plate 3-7, and the waste water after the adsorption reaction flows into the middle and lower part of the coagulation area 3-2 along the inclined bottom plate.
吸附剂的制备过程为：The preparation process of the adsorbent is as follows:
①把粉煤灰、粘土和碳酸钙分别粉碎、过筛，按质量比4:3:3混合搅拌；① Pulverize and sieve the fly ash, clay and calcium carbonate respectively, and mix and stir according to the mass ratio of 4:3:3;
②把搅拌混合后的混合物与水按质量比4：6混合搅拌均匀，自然风干，粉碎、过筛；②Mix the mixed mixture with water according to the mass ratio of 4:6, mix evenly, air dry naturally, pulverize and sieve;
③把筛分后的混合物在1200℃下煅烧80分钟；③ calcining the sieved mixture at 1200°C for 80 minutes;
④把煅烧物冷却、粉碎、筛分，制得吸附剂。④Cool the calcined product, crush it, and sieve it to obtain the adsorbent.
所述的吸附区3-1和混凝区3-2之间设有吸附混凝沉淀池挡流板3-8，吸附混凝沉淀池挡流板3-8的下部设置有45度的转角，转角转向吸附区一侧。混凝区3-2的中上部设置有混凝剂添加计量系统3-9，所述的混凝剂为氯化铁或硫酸铁溶液。混凝区下部设置有混凝区搅拌装置3-10。An adsorption coagulation sedimentation tank baffle 3-8 is provided between the adsorption area 3-1 and the coagulation area 3-2, and the lower part of the adsorption coagulation sedimentation tank baffle 3-8 is provided with a 45-degree corner , turning the corner to the side of the adsorption area. The upper middle part of the coagulation zone 3-2 is provided with a coagulant adding metering system 3-9, and the coagulant is ferric chloride or ferric sulfate solution. The lower part of the coagulation zone is provided with a stirring device 3-10 in the coagulation zone.
所述混凝区3-2和沉淀区3-3之间设有隔板3-11，该隔板与吸附混凝池的内壁形成作为废水进入沉淀区3-3的废水流道，沉淀区3-3的出口处设有吸附混凝池三相分离器3-12，沉淀区的出口上部设有吸附混凝池溢水堰3-13，沉淀区底部设计成锥形结构，在锥形结构底部设置有沉淀物排放阀3-14。吸附混凝池溢水堰3-13连接吸附混凝池出水管，吸附混凝池出水管连接流砂滤池进水管。A dividing plate 3-11 is arranged between the coagulation zone 3-2 and the settling zone 3-3, and this dividing plate and the inner wall of the adsorption coagulation tank form a waste water flow path that enters the settling zone 3-3 as waste water, and the settling zone The outlet of 3-3 is equipped with an adsorption coagulation tank three-phase separator 3-12, and the upper part of the outlet of the sedimentation area is provided with an adsorption coagulation tank overflow weir 3-13, and the bottom of the sedimentation area is designed as a conical structure. The bottom is provided with a sediment discharge valve 3-14. The overflow weir 3-13 of the adsorption coagulation tank is connected to the outlet pipe of the adsorption coagulation tank, and the outlet pipe of the adsorption coagulation tank is connected to the water inlet pipe of the quicksand filter.
所述流砂滤池4包括流砂滤池进水管4-1和用于排出处理后水的流砂滤池出水管，所述的流砂滤池包括布水区、洗砂区和砂滤区；所述的布水区位于流砂滤池的下部，布水区设有流砂滤池布水管4-2，流砂滤池布水管4-2连接流砂滤池进水管4-1，为了废水处理的效果更好，所述的流砂滤池布水管4-2设置成同心圆形状，流砂滤池布水管上具有向下辐射出水口；所述的洗砂区位于流砂滤池的中心，为圆柱形筒状结构，圆柱形筒状结构下端开口位于流砂滤池的最底部，圆柱形筒状结构上端开口位于流砂滤池的上部，洗砂区的中部设有气提管4-3，气提管4-3连接流砂滤池外的流砂滤池鼓风机4-4，洗砂区的上部设有砂水沉淀分离区，砂水沉淀分离区的上部设有洗砂区溢水堰4-5，洗砂区溢水堰4-5连接洗砂水排放管，砂水沉淀分离区的下部设有回砂通道4-6；所述的砂滤区位于洗砂区的外围，砂滤区内充填有细砂，砂滤区上部设有砂滤区溢水堰4-7，砂滤区溢水堰4-7连接流砂滤池出水管，流砂滤池过滤处理后的水达标排放。The quicksand filter 4 includes a quicksand filter inlet pipe 4-1 and a quicksand filter outlet pipe for discharging treated water, and the quicksand filter includes a water distribution area, a sand washing area and a sand filter area; The water distribution area is located in the lower part of the quicksand filter, and the water distribution area is provided with a quicksand filter water distribution pipe 4-2, and the quicksand filter water distribution pipe 4-2 is connected to the quicksand filter inlet pipe 4-1, so that the effect of wastewater treatment is better , the quicksand filter water distribution pipe 4-2 is arranged in the shape of concentric circles, and the quicksand filter water distribution pipe has a downward radiating water outlet; the described sand washing area is located in the center of the quicksand filter and is a cylindrical tubular structure , the lower opening of the cylindrical cylindrical structure is located at the bottom of the quicksand filter, the upper opening of the cylindrical cylindrical structure is located at the upper part of the quicksand filter, and the middle part of the sand washing area is provided with an air lift pipe 4-3, and an air lift pipe 4-3 Connect the quicksand filter blower 4-4 outside the quicksand filter. The upper part of the sand washing area is provided with a sand-water sedimentation separation area. The upper part of the sand-water sedimentation separation area is equipped with a sand washing area overflow weir 4-5. 4-5 is connected to the sand washing water discharge pipe, and the sand return channel 4-6 is provided at the lower part of the sand water precipitation separation area; the sand filter area is located at the periphery of the sand washing area, and the sand filter area is filled with fine sand, and the sand filter The upper part of the area is provided with overflow weirs 4-7 in the sand filter area, and the overflow weirs 4-7 in the sand filter area are connected to the outlet pipe of the quicksand filter, and the filtered water in the quicksand filter is discharged up to the standard.
一种采用上述农用污泥的重金属去除装置进行操作的方法，具有如下步骤：A kind of method that adopts the heavy metal removal device of above-mentioned agricultural sludge to operate, has the following steps:
①来自二沉池的剩余污泥和来自污泥回流管1-3的污泥混合后从酸化池入口1-1进入酸化池1，硫粉和表面活性剂添加与计量系统1-4添加硫粉和表面活性剂，酸化池搅拌器1-6对污泥进行搅拌混合，污泥中的氧化硫硫杆菌氧化硫粉并获得能量，同时污泥的pH降低，硫酸盐含量升高。然后污泥通过酸化池出口1-2和氧化浓缩池入口2-3进入混合室2-1，铁粉和过氧化氢添加与计量系统2-4添加铁粉和过氧化氢，铁粉和过氧化氢形成的Fenton剂对污泥进行氧化，混合室搅拌器2-5对污泥进行搅拌混合，污泥中的重金属进一步溶出，然后污泥进入浓缩室2-2，浓缩室的上清液通过浓缩液溢流堰2-7流入吸附混凝池进水管3-4，浓缩后的污泥通过氧化浓缩池污泥排放阀2-8排出，一部分浓缩污泥进入污泥回流管，一部分浓缩污泥通过污泥排放管进入污泥脱水车间，脱水后的污泥农用。① The remaining sludge from the secondary sedimentation tank and the sludge from the sludge return pipe 1-3 are mixed and then enter the acidification tank 1 from the acidification tank inlet 1-1, and the sulfur powder and surfactant are added and the metering system 1-4 adds sulfur powder and surfactant, the acidification tank agitator 1-6 stirs and mixes the sludge, Thiobacillus thiooxidans in the sludge oxidizes the sulfur powder and obtains energy, while the pH of the sludge decreases and the sulfate content increases. Then the sludge enters the mixing chamber 2-1 through the acidification tank outlet 1-2 and the oxidation concentration tank inlet 2-3, iron powder and hydrogen peroxide are added and metering system 2-4 adds iron powder and hydrogen peroxide, iron powder and peroxide The Fenton agent formed by hydrogen oxidation oxidizes the sludge, and the agitator 2-5 in the mixing chamber stirs and mixes the sludge. The heavy metals in the sludge are further dissolved, and then the sludge enters the concentration chamber 2-2, and the supernatant of the concentration chamber The concentrated liquid flows into the inlet pipe 3-4 of the adsorption coagulation tank through the overflow weir 2-7, and the concentrated sludge is discharged through the sludge discharge valve 2-8 of the oxidation concentration tank, part of the concentrated sludge enters the sludge return pipe, and part of the concentrated sludge The sludge enters the sludge dewatering workshop through the sludge discharge pipe, and the dehydrated sludge is used for agriculture.
②浓缩室上清液形成的废水通过吸附混凝池进水管3-4进入吸附区3-1，吸附剂添加计量系统3-5添加吸附剂，吸附区搅拌器3-6对废水进行搅拌混合，废水中的重金属离子被吸附剂吸附和吸收。废水通过吸附区下部设有的倾斜底板3-7和吸附混凝沉淀池挡流板3-8之间的空隙进入混凝区3-2，与来自混凝剂添加计量系统的混凝剂溶液混合，利用设置在混凝区底部的混凝区搅拌装置3-10进行搅拌。废水进入沉淀区3-3的废水流道，吸附混凝池三相分离器3-12实现废水和固体的分离，沉淀物在重力的作用下下沉到沉淀区的下部，通过底部的沉淀物排放阀3-14排出，沉淀后的废水通过吸附混凝池溢水堰3-13和吸附混凝池出水管进入流砂滤池。②Wastewater formed from the supernatant of the concentration chamber enters the adsorption zone 3-1 through the inlet pipe 3-4 of the adsorption coagulation tank, the adsorbent addition metering system 3-5 adds the adsorbent, and the agitator 3-6 in the adsorption zone stirs and mixes the wastewater , the heavy metal ions in the wastewater are adsorbed and absorbed by the adsorbent. Wastewater enters the coagulation area 3-2 through the gap between the inclined bottom plate 3-7 provided at the lower part of the adsorption area and the baffle plate 3-8 of the adsorption coagulation sedimentation tank, and the coagulant solution from the coagulant addition metering system Mixing, using the coagulation zone stirring device 3-10 arranged at the bottom of the coagulation zone to stir. The wastewater enters the wastewater flow channel of the sedimentation zone 3-3, and the three-phase separator 3-12 of the adsorption coagulation tank realizes the separation of wastewater and solids, and the sediment sinks to the lower part of the sedimentation zone under the action of gravity, and the sediment at the bottom passes through The discharge valve 3-14 is discharged, and the settled waste water enters the quicksand filter tank through the adsorption coagulation tank overflow weir 3-13 and the adsorption coagulation tank outlet pipe.
③废水通过流砂滤池进水管4-1、流砂滤池布水管4-2进入流砂滤池的下部，流砂滤池布水管4-2实现均匀布水，废水进入砂滤区，废水中的污染物被过滤，然后废水穿过砂滤区，由砂滤区溢水堰4-7和流砂滤池出水管流出，达标排放；流砂滤池鼓风机4-4产生的气流带动洗砂区中的砂和水向上流动，同时对砂进行冲洗，然后砂和水进入砂水沉淀分离区，由于砂和水的比重不同，细砂沉淀下去并通过回砂通道4-6流入砂滤区，实现砂滤区中的细砂不断从上往下的移动，砂水沉淀分离区中的水通过洗砂区溢水堰4-5和洗砂水排放管排入市政污水处理系统。③The waste water enters the lower part of the quicksand filter through the quicksand filter water inlet pipe 4-1 and the quicksand filter water distribution pipe 4-2, and the quicksand filter water distribution pipe 4-2 realizes uniform water distribution, and the waste water enters the sand filter area, and the pollution in the waste water The waste water is filtered, then the waste water passes through the sand filter area, flows out by the overflow weir 4-7 of the sand filter area and the outlet pipe of the quicksand filter, and discharges up to the standard; the airflow produced by the quick sand filter blower 4-4 drives the sand and sand in the sand washing area The water flows upwards and washes the sand at the same time, and then the sand and water enter the sand-water precipitation separation area. Due to the different specific gravity of the sand and water, the fine sand settles down and flows into the sand filter area through the sand return channel 4-6 to realize the sand filter area. The fine sand in the sand continuously moves from top to bottom, and the water in the sand-water sedimentation separation area is discharged into the municipal sewage treatment system through the overflow weir 4-5 in the sand washing area and the sand washing water discharge pipe.
④吸附混凝池产生的沉淀物脱水后外运。④ The sediment produced in the adsorption coagulation tank is dehydrated and transported outside.
以上述依据本发明的理想实施例为启示，通过上述的说明内容，相关工作人员完全可以在不偏离本项发明技术思想的范围内进行多样的变更以及修改。本项发明的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围来确定其技术性范围。Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.
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