甘肃 电镀废水处理 化工业污水处理 电解式 哪家强

公司简介：济宁天通水处理设备有限公司是集研发、制造、销售为一体，是一家实力雄厚的水处理设备企业。公司专业从事废水处理站、废水处理工艺、废水处理设备、工业废水处理设备、水处理设备、生活废水处理设备、环境废水处理设备等水处理设备。济宁天通水处理设备有限公司以雄厚的实力、合理的价格、优良的服务与多家企业建立了长期的合作关系。济宁天通水处理设备有限公司热诚欢迎各界前来参观、考察、洽谈业务! 
一、电镀废水的来源
   1．度件清洗水；2．废电镀液；3．其他废水，包括冲刷车间地面，刷洗较板洗水，通风设备冷凝水，以及由于镀槽渗漏或操作管理不当造成的“跑、冒、滴、漏”的各种槽液和排放。4．设备冷却水，冷却水在使用过程中除温度升高以外，未受到污染。
二、电镀废水的成分
   含氰（CN－）废水和酸碱废水外，重金属废水是电镀业潜在危害性较大的废水类别。根据重金属废水中含重金属元素进行分类，一般可以分为含铬（Cr）废水、含镍（Ni）废水、含镉（Cd）废水、含铜（Cu）废水、含锌（Zn）废水、含金（Au）废水、含银（Ag）废水等。
三、电镀污水处理方法
   化学氧化法：利用某些溶解于废水中的有毒有害物质在氧化还原反应中能被氧化或还原的性质，通过投加氧化剂或还原剂将其转化为无毒无害的新物质，或者转化成容易从水中分离排除的气体或固体形态，从而达到处理这些有毒有害物质的目的，这种方法就是氧化还原法。
  1．含铬废水：在酸性PH值为2￣3条件下，将亚硫酸根将六价铬还原成三价铬，然后调PH值为8￣10．5，使之生成氢氧化物沉淀。
  2．含氰废水：废水在碱性条件下，次氯酸盐氰根氧化分解为无毒的物质，其反应原理为在碱性条件下，用氯酸钠作氧化剂，使氰根氧化成氮气、氢气和碳酸盐。
  3．含焦磷酸铜废水：利用重金属硫化物的溶度积非常小的原理，在反应沉淀池中投加Na2S破络，然后通过PH控制系统自动投加石灰，调节PH值10．5，废水中磷酸根离子与钙离子生成基磷酸盐，反应完全后，经过静置沉淀，上清液流入综合废水调节池，沉渣由重力排入污泥过渡池。
  4．含铜、镍酸碱综合废水：含镍、酸碱综合废水流入其调节池中破铬后的废水合并，然后提升到混合池中，在混合池中和破氰后的废水合并，加入氢氧化钠调整PH值在10．5左右，然后自流到反应池中，这时镍、铬等离子形成溶度积极小的沉淀物，通过投加石灰和絮凝剂，使水中颗粒在絮凝剂的作用下加大，然后再沉淀池中利用浅层沉淀的原理加速度沉淀分离，达到去除重金属的目的。
四、废水回用工艺
废水经物化处理后经泵输送至回用水系统，含铬废水经处理达标后直接回用至前处理工序用水，处理达标后的酸碱废水和含锌废水经多级沉淀过滤后进入回用系统。回用系统前处理装置中，经过处理达标后的废水泵入多介质过滤器，以截留除去水中的角度粒径悬浮物、不溶性**物、胶质颗粒、微生物等杂质碳过滤器可吸附水中的部分重金属离子和溶解性**物，能吸附前级过滤中无法去除的余氯，以防止后级膜组件受余氯的氧化而分解进入膜组件的余氯要求大于0．1mg／L。
即使通过碳滤、微滤后的废水杂质大为减少，也不能直接通过反渗透来制取回用水。微滤只能截留0．1￣1um之间的颗粒，能允许大分子**物和溶解性固体通过。为减少反渗透膜膜清洗次数，延长反渗透膜额使用寿命，超滤做为可靠的反渗透处理系统显得尤为重要。超滤膜可截留粒径大雨膜孔的微粒和分子量30000￣10000的分子溶质，而无机离子和分子量小于5000的溶质能透过膜。
反渗透膜能够截留水中的各种金属离子、非金属离子、胶体和小分子的**物反渗透膜对于无机离子，特别是对废水的二价和高价分离率一般可达95以上。
厢式压滤机是通过设备中的介质（一般为滤布）的阻挡来实现固液分离的效果。设备使得介质的两边形成压力差，这样液体就是通过滤布再进过管道排出，而固体就被留在了滤布上，慢慢的累积，就形成了。
厢式压滤机的优点有一下几点：
  1、厢式压滤机要比板框压滤机经久耐用。
  2、过滤效率高。同样的张数的、大小的滤板，厢式压滤机的有效过滤面积是板框压滤机的2倍。
  3、厢式使用更加的广泛，可以使用在医药制药、食品加工、冶金冶炼、开采等众多的行业。
  4、厢式压滤机一般要比板框压滤机的使用温度更高，所以它的适用范围更广。
  5、厢式压滤机更好的结合了现在的技术，可以横好的自动化设计。现在很多自动化的压滤机就是采用了厢式压滤机同样的过滤模式。
Company introduction: Jining Tian Tong Shui processing equipment Co., Ltd. is a combination of R & D, manufacturing and sales. It is a strong water treatment equipment enterprise. The company specializes in water treatment equipment such as wastewater treatment station, waste water treatment process, waste water treatment equipment, industrial waste water treatment equipment, water treatment equipment, domestic wastewater treatment equipment, environmental waste water treatment equipment and so on. Jining Tian Tong Shui processing equipment Co., Ltd. has established a long-term cooperative relationship with many enterprises with strong strength, reasonable price and excellent service. Jining Tian Tong Shui processing equipment Co., Ltd. warmly welcome all walks of life to visit, inspect, negotiate business!
1. Source of electroplating wastewater
1. degree cleaning water; 2. waste plating solution; 3. other waste water, including scouring workshop floor, washing plate washing water, ventilation condensate water, and all kinds of tanks and drainage caused by leakage or improper operation management.  4. the cooling water of the equipment, the cooling water is not polluted in addition to the increase of temperature in the process of use.
Two, the composition of electroplating wastewater
Heavy metal wastewater is a potentially hazardous waste water category in electroplating industry, which contains cyanide (CN) wastewater and acid base wastewater. According to the classification of heavy metal elements in heavy metal wastewater, it can be generally divided into chromium (Cr) wastewater, nickel (Ni) wastewater, cadmium (Cd) wastewater, copper (Cu) wastewater, zinc (Zn) wastewater, gold containing (Au) wastewater, silver (Ag) wastewater and so on.
Three. Treatment of electroplating sewage
Chemical oxidation method: using some dissolved in waste water of toxic and harmful substances in the redox reaction can be oxidized or reduced, by adding an oxidizing or reducing agent will be transformed into new material is non-toxic and harmless, or into the easy separation of the discharged gas or solid form from the water, so as to deal with the toxic the purpose of the harmful material, this method is oxidation reduction method.
1. chromium containing wastewater under acidic pH was 2 ~ 3 under the condition of the sulfite six valence chromium reduction to trivalent chromium, and then adjust the pH value of 8 ~ 10.5, the precipitation of hydroxide.
2., cyanide containing wastewater: under alkaline conditions, hypochlorite and cyanogen are decomposed into non-toxic substances. The reaction principle is to oxidize cyanide to nitrogen, hydrogen and carbonate under alkaline conditions with sodium chlorate as oxidant.
3. containing pyrophosphate copper wastewater by heavy metal sulfide solubility product principle is very small, in the pond and the Na2S complex breaking reaction precipitation, and then through the PH automatic control system of lime, adjusting the pH of 10.5, phosphate phosphate ions and calcium ions generated radical in wastewater, reaction completely, after settling. The supernatant of wastewater inflow regulation pond sediment by gravity into the sludge pool transition.
4. copper and nickel wastewater with chromium wastewater pH: after the break, nickel containing wastewater into the comprehensive acid-base regulation pool, and then ascend to the mixing tank, in combination with the mixed wastewater pool and cyanide after adding sodium hydroxide, adjust the pH value is about 10.5, and then flowed into the reaction tank, then nickel and chromium the formation of small positive plasma solubility of precipitate by adding lime and water particles increase in flocculant, flocculant effect, and then precipitation separation by using the principle of acceleration of shallow layer sedimentation pool, achieve the purpose of removing heavy metals.
Four. Recycling process of waste water
After being treated by physicochemical treatment, the wastewater is transported to the reclaimed water system through the pump. After treatment, the chromium containing wastewater is directly reused to the pretreatment process water after reaching the standard. After treatment, the acid base wastewater and the zinc containing wastewater after reaching the standard are filtered into the recycling system after multistage precipitation. Reuse device before treatment system, wastewater treatment compliance after pump into multi media filter, to remove the water interception angle size of suspended solids, insoluble organic matter, colloid particles, microbial impurities such as carbon filter can adsorb the heavy metal ions and dissolved organic compounds, adsorption to remove residual chlorine before filtration, to prevent oxidation by chlorine after stage membrane assembly and decomposition of residual chlorine into the membrane module is more than 0.1mg / L.
Even if the waste water after carbon filtration and microfiltration is greatly reduced, the water can not be retrieved directly through reverse osmosis. Only between 0.1 ~ 1um microfiltration trapped particles, allowing large molecular organic matter and dissolved solids by. In order to reduce the cleaning times of reverse osmosis membrane membrane and prolong the service life of reverse osmosis membrane, ultrafiltration is very important to be a reliable reverse osmosis treatment system. Ultrafiltration membrane can reject the size of rain film hole particles and molecules from 30000 to 10000 and the solute, inorganic ions and molecular weight of less than 5000 of the solute through the membrane.
Reverse osmosis membrane can intercept all kinds of metal ions, non-metal ions, colloids and small molecules of organic matter in reverse osmosis membrane, and the separation rate of inorganic ion, especially for two and high price of wastewater is generally more than 95.
The filter press is designed to achieve solid liquid separation by blocking the medium in the equipment (usually the filter cloth). The device makes the pressure difference between the two sides of the medium, so that the liquid is discharged through the filter cloth and then into the pipeline, and the solid is left on the filter cloth, and slowly accumulated.
The advantages of the van filter press have a few points:
1. The wing filter press is more durable than the plate frame filter press.
2. The filtration efficiency is high. The same size and size filter plate, the effective filter area of the filter press is 2 times that of the plate and frame filter press.
3, the use of van style is more extensive and can be used in many industries, such as pharmaceutical, food processing, metallurgy, smelting, mining and so on.
4. The wing type filter press is generally compared