WO2013159534A1 - Method for treating wastewater resulting from wool-washing by coupling ultrasonic wave demulsification and supercritical water oxidation - Google Patents

Method for treating wastewater resulting from wool-washing by coupling ultrasonic wave demulsification and supercritical water oxidation Download PDF

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WO2013159534A1
WO2013159534A1 PCT/CN2012/085890 CN2012085890W WO2013159534A1 WO 2013159534 A1 WO2013159534 A1 WO 2013159534A1 CN 2012085890 W CN2012085890 W CN 2012085890W WO 2013159534 A1 WO2013159534 A1 WO 2013159534A1
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wastewater
demulsification
lanolin
water
wool washing
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PCT/CN2012/085890
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French (fr)
Chinese (zh)
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王树众
张洁
唐兴颖
徐东海
王玉珍
梁琛
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西安交通大学
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Publication of WO2013159534A1 publication Critical patent/WO2013159534A1/en

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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
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • 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
    • 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
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry

Definitions

  • the invention relates to a method for treating waste water, in particular to a method for treating wool washing wastewater. Background technique
  • Washing wool wastewater is a high-concentration organic wastewater with poor biodegradability. It mainly contains lanolin and detergent. It also contains sheep sweat, sheep urine, sheep manure, grass clippings, sediment and other impurities, as well as parasite eggs and bacteria.
  • the concentration of CT chemical oxygen demand measured by using potassium dichromate as oxidant
  • Waste water higher 00 ⁇ value is mainly caused by the presence of lanolin, which accounts for almost 70 ⁇ 80%.
  • Lanolin is composed of monoester, diester and high molecular weight lanolin hydroxy ester and high molecular weight lanolin.
  • the mixture is a high value-added industrial raw material.
  • the price of industrial lanolin is 15,000 ⁇ 30,000 yuan/ton. Therefore, before the wool washing wastewater is treated, the recovery of lanolin can not only bring considerable economic benefits, but also The subsequent wastewater treatment pressure is greatly reduced.
  • the process of directly treating the wool washing wastewater is generally as follows: Firstly, the wool wastewater is pretreated, and the sediment, wool, etc. are removed by flocculation and coagulation, and then anaerobic and aerobic biological treatment is performed to achieve wool washing.
  • the wastewater is discharged after treatment.
  • wastewater treatment efficiency is low, and lanolin is degraded in the process, resulting in a great waste of resources.
  • the flocculation process produces a large amount of chemical sludge, which greatly increases the difficulty of the wastewater treatment process.
  • the existing processes for recovering lanolin in wool washing wastewater mainly include acid precipitation method, coagulation sedimentation method, membrane filtration method and centrifugal separation method.
  • the former two are chemical demulsification methods. Chemical demulsifiers are introduced in the process, which not only causes the quality of lanolin to decrease, but also is not conducive to the treatment of subsequent wastewater and sludge.
  • the physical demulsification method does not introduce chemicals, but the membrane filtration method exists.
  • the main problem is that the membrane is easy to block during the filtration process, which seriously affects the reliability of the process.
  • Most of the plants use centrifugal separation to recover lanolin. However, the recovery rate of lanolin by centrifugal separation method is very low, generally only 30%.
  • the low recovery rate of lanolin not only causes waste of resources, but also greatly increases the concentration of organic matter in the mixed wastewater, resulting in difficulty in wastewater treatment, large consumption of chemicals, large amount of sludge production, and difficulty in achieving wastewater treatment. Therefore, the treatment of wool washing wastewater should be comprehensively considered from the aspects of recycling and utilization of lanolin to achieve good results.
  • An object of the present invention is to provide a method for achieving harmless treatment and resource utilization of wool washing wastewater.
  • the invention relates to a method for treating wool washing wastewater by ultrasonic demulsification coupling supercritical water oxidation, which comprises the following steps:
  • a method for treating wool washing wastewater by ultrasonic demulsification coupling supercritical water oxidation characterized in that the method comprises the following steps:
  • the wastewater from the wool washing process unit is physically demulsified by ultrasonic wave.
  • the wastewater after demulsification is divided into three parts: lanolin liquid carrying a small amount of waste water, low-concentration wastewater, and demulsification sludge;
  • Step (1) The generated demulsification sludge enters the supercritical water oxidation system for decomposition treatment, and the reactants include C0 2 and clean water, wherein the clean water is a hot fluid, which is reused for the wool washing process.
  • the clean water is used in the wool washing process, and the following steps are included:
  • the clean water is sent to the tube side of a heat exchanger, and the shell side of the heat exchanger is passed through demineralized water, and the clean water is cooled by the softened water, and at the same time, the softened water is heated to generate superheated steam;
  • step a the superheated steam described in step a is returned to the wool washing process.
  • Step (1) The crude lanolin described in the step (1) can be directly sold.
  • Step (4) described (0 2 after recycling can be sold.
  • the present invention uses ultrasonic waves to break the wool washing wastewater.
  • Ultrasonic demulsification is an efficient physical demulsification method. No chemical agent is introduced in the process, and the demulsification can be adjusted by controlling the working condition parameters. Layering effect to improve lanolin recovery and increase the economic efficiency of lanolin recovery
  • the demulsification sludge produced after the emulsification of the wool washing wastewater can be effectively disposed by the supercritical water oxidation method, and the heat of the hot fluid after the superheated steam is recovered by the heat exchanger; the sludge organic matter is oxidized by supercritical water
  • the degradation can be completely oxidized to co 2 , and the co 2 produced by the recovery reaction can improve the economical efficiency of the system; the effluent after the supercritical water oxidation treatment is clean water, which can be reused for the wool washing process to realize the recycling of water resources.
  • FIG. 1 is a process flow diagram of the wool washing wastewater treatment of the present invention. detailed description
  • a method for treating wool washing wastewater, washing wool waste water from the wool washing process unit 3 (400t/d, (00 ⁇ value 7000011 ⁇ /1 first formed by stratification by ultrasonic physical demulsification unit, upper, middle,
  • the lower three layers are respectively a lanolin mixture carrying a small amount of wastewater, a low concentration (00 ⁇ value of 19,000 mg/L) of wastewater 4, and a demulsification sludge. 6.
  • the lower layer of demulsified sludge enters the supercritical water oxidation system unit for effective disposal;
  • the separated lanolin mixture 2 carrying a small amount of waste water enters the centrifugal separator, and the crude lanolin 1 (about 1.87 t/d) and a small amount of waste water 5 are separated, wherein the crude lanolin can be directly sold; the separated wastewater 5 and the ultrasonic wave
  • the low-concentration wastewater 4 from the physical demulsification unit is mixed into the sewage treatment unit and discharged after being degraded.
  • the ultrasonic physical demulsification unit does not add any chemicals, does not affect the quality of the recovered lanolin; can efficiently recover lanolin, the recovery rate of lanolin can reach 66.5%, reduce the waste of resources caused by the loss of lanolin and the inflow of sludge and The wastewater is responsible for the processing load of subsequent processing units.
  • the lower layer of demulsified sludge after stratification of the ultrasonic demulsification unit enters the supercritical water oxidation system unit for supercritical water oxidation reaction degradation treatment, which is effectively converted into C0 2 and clean water, and the clean water can be reused for the wool washing process unit.
  • the clean water after the supercritical water oxidation reaction is a hot fluid, which is cooled by the heat exchanger, and simultaneously heats the cold fluid to soften the water 8, and generates superheated steam 7, which can be reused for the wool washing process, and fully utilizes the heat of the fluid after the reaction.
  • the C0 2 produced by the supercritical water oxidation reaction of the recovered demulsified sludge can be sold after being canned, which improves the economical efficiency of the system.
  • the method of the invention effectively couples the ultrasonic physical demulsification with the supercritical water oxidation technology, efficiently recovers the lanolin and disposes the demulsified sludge, wherein the lanolin recovery rate can reach 66.5%, and the sludge disposal COD CT _
  • the removal rate is 99.98%.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Treatment Of Sludge (AREA)

Abstract

A method for treating wastewater resulting from wool-washing by coupling ultrasonic wave demulsification and supercritical water oxidation comprises the following steps: A) wastewater (3) resulting from wool-washing first undergoing ultrasonic wave demulsification to be divided into three parts, namely, lanolin liquid (2), low concentration wastewater (4), and sludge (6) resulting from demulsification; B) the sludge (6) resulting from demulsification entering a supercritical water oxidation system to undergo decomposition treatment; C) the separated lanolin liquid (2) entering a centrifugal separator to separate crude lanolin (1) and wastewater (5); D) the low concentration wastewater (4) being mixed with the wastewater (5) separated by the centrifugal separator, and then entering a wastewater treatment unit to undergo treatment before meeting standards and being discharged. By combining effective recycling of lanolin and treatment of pollutants, the method can solve the problems of recycling of resources and harmless treatment of wastes in the treatment process of wastewater resulting from wool-washing.

Description

超声波破乳耦合超临界水氧化处理洗羊毛废水的方法 技术领域  Method for treating wool washing wastewater by ultrasonic demulsification coupling supercritical water oxidation
本发明涉及一种废水的处理方法， 具体涉及一种洗羊毛废水的处理方法。 背景技术  The invention relates to a method for treating waste water, in particular to a method for treating wool washing wastewater. Background technique
洗羊毛废水是高浓度有机废水， 可生化性差， 其中主要含有羊毛脂、 洗 涤剂， 此外含有羊汗、 羊尿、 羊粪、 草屑、 泥沙等杂质以及寄生虫卵和细菌 等， 其 CODCT (采用重铬酸钾作为氧化剂测定出的化学耗氧量)浓度高达 (4〜 6)xl04mg/L， 若直接排放， 必将严重污染环境。 废水 ( 00^值较高主要是因 为羊毛脂存在所造成， 几乎占据了 70〜80%比例。 羊毛脂是由单酯、 双酯和 高分子量羊毛醇的羟基酯及高分子量的羊毛酸组成的混合物， 是一种高附加 值的工业原料， 调研工业羊毛脂的价格为 15000〜30000元 /吨。因此洗羊毛废 水处理前， 对羊毛脂进行回收， 不仅可以带来可观的经济效益， 并且很大程 度地降低了后续废水处理压力。 Washing wool wastewater is a high-concentration organic wastewater with poor biodegradability. It mainly contains lanolin and detergent. It also contains sheep sweat, sheep urine, sheep manure, grass clippings, sediment and other impurities, as well as parasite eggs and bacteria. The concentration of CT (chemical oxygen demand measured by using potassium dichromate as oxidant) is as high as (4~6)xl0 4 mg/L. If it is directly discharged, it will seriously pollute the environment. Waste water (higher 00^ value is mainly caused by the presence of lanolin, which accounts for almost 70~80%. Lanolin is composed of monoester, diester and high molecular weight lanolin hydroxy ester and high molecular weight lanolin. The mixture is a high value-added industrial raw material. The price of industrial lanolin is 15,000~30,000 yuan/ton. Therefore, before the wool washing wastewater is treated, the recovery of lanolin can not only bring considerable economic benefits, but also The subsequent wastewater treatment pressure is greatly reduced.
直接对洗羊毛废水进行无害化处理的工艺一般为： 首先对羊毛废水进行 预处理， 通过絮凝、 混凝方法将泥沙、 羊毛等去除， 再进行厌氧和好氧生物 处理， 实现洗羊毛废水处理后达标排放。 但是由于羊毛脂的难降解性， 废水 处理效率较低， 并且羊毛脂在过程中被降解， 造成了很大的资源浪费。 另外， 絮凝环节产生大量的化学污泥， 很大程度地增大了废水处理工艺的难度。  The process of directly treating the wool washing wastewater is generally as follows: Firstly, the wool wastewater is pretreated, and the sediment, wool, etc. are removed by flocculation and coagulation, and then anaerobic and aerobic biological treatment is performed to achieve wool washing. The wastewater is discharged after treatment. However, due to the refractory nature of lanolin, wastewater treatment efficiency is low, and lanolin is degraded in the process, resulting in a great waste of resources. In addition, the flocculation process produces a large amount of chemical sludge, which greatly increases the difficulty of the wastewater treatment process.
现有的回收洗羊毛废水中羊毛脂的工艺主要有酸析法、 混凝沉降法、 膜 过滤方法以及离心分离法。 前两者属于化学破乳方法， 过程中会引入化学破 乳剂， 不仅导致羊毛脂质量下降， 而且不利于后续废水和污泥的处理； 物理 破乳方法不会引入化学药剂， 但是膜过滤方法存在的主要问题是过滤的过程 中膜容易堵， 从而严重影响了工艺的可靠性； 工厂大多采用离心分离法回收 羊毛脂， 然而离心分离法对羊毛脂的回收率很低， 一般仅为 30%, 羊毛脂的 回收率低不仅造成了资源浪费， 而且大大提高了混合废水的有机物浓度， 导 致废水处理难度大、 药剂消耗量多、 污泥产生量大， 以及废水处理难以达标。 因此， 洗羊毛废水的处理应从羊毛脂的回收利用和污染物治理两方面综合考 虑， 才能取得良好的效果。 _ 发明内容 The existing processes for recovering lanolin in wool washing wastewater mainly include acid precipitation method, coagulation sedimentation method, membrane filtration method and centrifugal separation method. The former two are chemical demulsification methods. Chemical demulsifiers are introduced in the process, which not only causes the quality of lanolin to decrease, but also is not conducive to the treatment of subsequent wastewater and sludge. The physical demulsification method does not introduce chemicals, but the membrane filtration method exists. The main problem is that the membrane is easy to block during the filtration process, which seriously affects the reliability of the process. Most of the plants use centrifugal separation to recover lanolin. However, the recovery rate of lanolin by centrifugal separation method is very low, generally only 30%. The low recovery rate of lanolin not only causes waste of resources, but also greatly increases the concentration of organic matter in the mixed wastewater, resulting in difficulty in wastewater treatment, large consumption of chemicals, large amount of sludge production, and difficulty in achieving wastewater treatment. Therefore, the treatment of wool washing wastewater should be comprehensively considered from the aspects of recycling and utilization of lanolin to achieve good results. _ Summary of the invention
本发明的目的是提供一种实现洗羊毛废水无害化处理以及资源化利用的 方法。  SUMMARY OF THE INVENTION An object of the present invention is to provide a method for achieving harmless treatment and resource utilization of wool washing wastewater.
为达到以上目的， 本发明是采取如下技术方案予以实现的：  In order to achieve the above object, the present invention is implemented by the following technical solutions:
一种超声波破乳耦合超临界水氧化处理洗羊毛废水的方法， 其特征在于， 包 括如下步骤： 一种超声波破乳耦合超临界水氧化处理洗羊毛废水的方法， 其 特征在于， 包括以下步骤： The invention relates to a method for treating wool washing wastewater by ultrasonic demulsification coupling supercritical water oxidation, which comprises the following steps: A method for treating wool washing wastewater by ultrasonic demulsification coupling supercritical water oxidation, characterized in that the method comprises the following steps:
( 1 ) 首先通过超声波对洗羊毛工艺单元出来的废水进行物理破乳， 破乳 后废水分三部分： 携带少量废水的羊毛脂液、 低浓度废水、 破乳污泥；  (1) Firstly, the wastewater from the wool washing process unit is physically demulsified by ultrasonic wave. The wastewater after demulsification is divided into three parts: lanolin liquid carrying a small amount of waste water, low-concentration wastewater, and demulsification sludge;
(2)将携带少量废水的羊毛脂液， 用离心分离器将分离成粗羊毛脂和废 水；  (2) The lanolin liquid carrying a small amount of waste water is separated into coarse lanolin and waste water by a centrifugal separator;
( 3 ) 低浓度废水与步骤 （2 ) 离心分离器分离出的废水混合后进入污水 处理单元进行降解， 达标后排放；  (3) Low-concentration wastewater and steps (2) The wastewater separated by the centrifugal separator is mixed and then enters the sewage treatment unit for degradation, and is discharged after reaching the standard;
(4 ) 步骤 （1 ) 产生的破乳污泥进入超临界水氧化系统进行分解处理， 反应物包括 C02和干净水， 其中干净水为热流体， 回用于洗羊毛工艺。 (4) Step (1) The generated demulsification sludge enters the supercritical water oxidation system for decomposition treatment, and the reactants include C0 2 and clean water, wherein the clean water is a hot fluid, which is reused for the wool washing process.
上述方法中， 所述的干净水回用于洗羊毛工艺， 包括下述步骤：  In the above method, the clean water is used in the wool washing process, and the following steps are included:
a、 将干净水送入一个换热器的管侧， 换热器的壳侧通软化水， 干净水被 软化水冷却， 同时加热软化水， 产生过热蒸汽；  a. The clean water is sent to the tube side of a heat exchanger, and the shell side of the heat exchanger is passed through demineralized water, and the clean water is cooled by the softened water, and at the same time, the softened water is heated to generate superheated steam;
b、 被冷却的干净水输送至洗羊毛工艺单元重复利用；  b. The cooled clean water is transferred to the wool washing process unit for reuse;
其中， 步骤 a所述的过热蒸汽回用于洗羊毛工艺。  Wherein, the superheated steam described in step a is returned to the wool washing process.
步骤 （1 ) 所述的粗羊毛脂可直接售出。 步骤 （4) 所述的（ 02回收后罐 装出售。 The crude lanolin described in the step (1) can be directly sold. Step (4) described (0 2 after recycling can be sold.
与现有技术相比， 本发明采用超声波对洗羊毛废水进行破乳， 超声波破 乳是一种高效的物理破乳方法， 过程中未引入任何化学药剂， 可通过控制工 况参数， 调节破乳分层效果来提高羊毛脂回收率， 增加羊毛脂回收的经济效 Compared with the prior art, the present invention uses ultrasonic waves to break the wool washing wastewater. Ultrasonic demulsification is an efficient physical demulsification method. No chemical agent is introduced in the process, and the demulsification can be adjusted by controlling the working condition parameters. Layering effect to improve lanolin recovery and increase the economic efficiency of lanolin recovery
、 洗羊毛废水破乳分层后产生的破乳污泥通过超临界水氧化方法可以实现 有效地处置， 通过换热器生成过热蒸汽回收反应后热流体的热量； 污泥有机 物经超临界水氧化降解可完全氧化为 co2， 回收反应产生的 co2提高系统的 经济性； 经超临界水氧化处理后的出水为干净水， 可回用于洗羊毛工艺， 实 现水资源的循环利用。 _ 通过超声波破乳技术与超临界水氧化处理破乳污泥技术的有效结合， 实 现了废水处理过程中产生污泥的减量化与高效处置， 具体表现在以下三个方 面： 首先高效的物理破乳， 有效降低了污泥中羊毛脂的含量； 其次， 超临界 水氧化处理后， 破乳污泥被全部氧化； 最后， 经破乳与超临界水氧化工艺后， 进入后续废水处理单元的废水进水量和 CODCT浓度很大程度降低， 减少了后 续单元中药剂的投加量， 进一步减少了污泥的产生量。 附图说明 The demulsification sludge produced after the emulsification of the wool washing wastewater can be effectively disposed by the supercritical water oxidation method, and the heat of the hot fluid after the superheated steam is recovered by the heat exchanger; the sludge organic matter is oxidized by supercritical water The degradation can be completely oxidized to co 2 , and the co 2 produced by the recovery reaction can improve the economical efficiency of the system; the effluent after the supercritical water oxidation treatment is clean water, which can be reused for the wool washing process to realize the recycling of water resources. _ Effective combination of ultrasonic demulsification technology and supercritical water oxidation treatment of demulsification sludge technology to achieve sludge reduction and efficient disposal in wastewater treatment process, which is embodied in the following three aspects: First, efficient physics Demulsification effectively reduces the content of lanolin in the sludge; secondly, after supercritical water oxidation treatment, the demulsified sludge is completely oxidized; finally, after the demulsification and supercritical water oxidation process, it enters the subsequent wastewater treatment unit. The amount of wastewater influent and COD CT concentration are greatly reduced, which reduces the dosage of the chemicals in the subsequent units and further reduces the amount of sludge produced. DRAWINGS
以下结合附图及具体实施方式对本发明作进一步的详细描述。  The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
图 1为本发明的洗羊毛废水处理的工艺流程图。 具体实施方式  Figure 1 is a process flow diagram of the wool washing wastewater treatment of the present invention. detailed description
参见图 1， 一种洗羊毛废水处理方法， 洗羊毛工艺单元出来的洗羊毛废水 3 (400t/d， （ 00^值7000011^/1 首先经超声波物理破乳单元形成分层， 上、 中、 下三层分别为携带少量废水的羊毛脂混合物 2、 低浓度 （ 00^值 19000mg/L) 废水 4、 破乳污泥 6。 下层破乳污泥进入超临界水氧化系统单元 进行有效处置； 上层分离出的携带少量废水的羊毛脂混合物 2进入离心分离 器， 分离出粗羊毛脂 1 (约 1.87t/d) 和少量废水 5， 其中， 粗羊毛脂可直接出 售； 分离出的废水 5和超声波物理破乳单元出来的低浓度废水 4混合流入污 水处理单元， 经降解后达标排放。  Referring to Figure 1, a method for treating wool washing wastewater, washing wool waste water from the wool washing process unit 3 (400t/d, (00^ value 7000011^/1 first formed by stratification by ultrasonic physical demulsification unit, upper, middle, The lower three layers are respectively a lanolin mixture carrying a small amount of wastewater, a low concentration (00^ value of 19,000 mg/L) of wastewater 4, and a demulsification sludge. 6. The lower layer of demulsified sludge enters the supercritical water oxidation system unit for effective disposal; The separated lanolin mixture 2 carrying a small amount of waste water enters the centrifugal separator, and the crude lanolin 1 (about 1.87 t/d) and a small amount of waste water 5 are separated, wherein the crude lanolin can be directly sold; the separated wastewater 5 and the ultrasonic wave The low-concentration wastewater 4 from the physical demulsification unit is mixed into the sewage treatment unit and discharged after being degraded.
其中， 超声波物理破乳单元未投加任何化学药剂， 不影响回收羊毛脂的 质量； 可高效回收羊毛脂， 羊毛脂回收率可达到 66.5%, 降低羊毛脂流失引起 的资源浪费以及流入污泥和废水中导致后续处理单元的处理负荷。  Among them, the ultrasonic physical demulsification unit does not add any chemicals, does not affect the quality of the recovered lanolin; can efficiently recover lanolin, the recovery rate of lanolin can reach 66.5%, reduce the waste of resources caused by the loss of lanolin and the inflow of sludge and The wastewater is responsible for the processing load of subsequent processing units.
超声波破乳单元分层后的下层破乳污泥进入超临界水氧化系统单元进行 超临界水氧化反应降解处理， 被有效转化为 C02及为干净水， 干净水可回用 于洗羊毛工艺单元， 实现了水资源的循环利用。 超临界水氧化反应后的干净 水为热流体，通过换热器被冷却， 同时加热冷流体软化水 8，产生过热蒸汽 7， 可回用于洗羊毛工艺， 充分利用了反应后流体的热量。 回收破乳污泥进行超 临界水氧化反应产生的 C02， 可罐装后出售， 提高了系统的经济性。 The lower layer of demulsified sludge after stratification of the ultrasonic demulsification unit enters the supercritical water oxidation system unit for supercritical water oxidation reaction degradation treatment, which is effectively converted into C0 2 and clean water, and the clean water can be reused for the wool washing process unit. , the realization of the recycling of water resources. The clean water after the supercritical water oxidation reaction is a hot fluid, which is cooled by the heat exchanger, and simultaneously heats the cold fluid to soften the water 8, and generates superheated steam 7, which can be reused for the wool washing process, and fully utilizes the heat of the fluid after the reaction. The C0 2 produced by the supercritical water oxidation reaction of the recovered demulsified sludge can be sold after being canned, which improves the economical efficiency of the system.
本发明方法将超声波物理破乳与超临界水氧化技术有效耦合， 高效回收 羊毛脂和处置破乳污泥， 其中羊毛脂回收率可达到 66.5%, 污泥处置 CODCT _ 去除率为 99.98%。 减少进入污水处理单元的废水有机物含量， 其 CODCT浓度 由现有的 35000mg/L降至 19000mg/L， 降低污水处理单元的处理负荷， 减少 废水处理的药剂投加量， 实现污泥的进一步减排。 The method of the invention effectively couples the ultrasonic physical demulsification with the supercritical water oxidation technology, efficiently recovers the lanolin and disposes the demulsified sludge, wherein the lanolin recovery rate can reach 66.5%, and the sludge disposal COD CT _ The removal rate is 99.98%. Reduce the organic matter content of wastewater entering the sewage treatment unit, and reduce its COD CT concentration from the existing 35000mg/L to 19,000mg/L, reduce the treatment load of the sewage treatment unit, reduce the dosage of wastewater treatment, and further reduce the sludge. row.

Claims

WO 2013/159534 +Π 工,■ ^ + _L>PCT/CN2012/085890 WO 2013/159534 +Π, ■ ^ + _L>PCT/CN2012/085890
1、 一种超声波破乳耦合超临界水氧化处理洗羊毛废水的方法， 其特征在 于， 包括以下歩骤： A method for ultrasonically demulsification coupled supercritical water oxidation treatment of wool washing wastewater, characterized by comprising the following steps:
( 1 ) 首先通过超声波对洗羊毛工艺单元出来的废水进行物理破乳， 破乳 后废水分三部分： 携带少量废水的羊毛脂液、 低浓度废水、 破乳污泥；  (1) Firstly, the wastewater from the wool washing process unit is physically demulsified by ultrasonic wave. The wastewater after demulsification is divided into three parts: lanolin liquid carrying a small amount of waste water, low-concentration wastewater, and demulsification sludge;
(2)将携带少量废水的羊毛脂液， 用离心分离器将分离成粗羊毛脂和废 水；  (2) The lanolin liquid carrying a small amount of waste water is separated into coarse lanolin and waste water by a centrifugal separator;
(3 ) 低浓度废水与歩骤 （2) 离心分离器分离出的废水混合后进入污水 处理单元进行降解， 达标后排放；  (3) Low-concentration wastewater and enthalpy (2) The wastewater separated by the centrifugal separator is mixed and then enters the sewage treatment unit for degradation, and is discharged after reaching the standard;
(4) 歩骤 （1 ) 产生的破乳污泥进入超临界水氧化系统进行分解处理， 反应物包括 C02和干净水， 其中干净水为热流体， 回用于洗羊毛工艺。 (4) The demulsification sludge produced in step (1) is decomposed into a supercritical water oxidation system. The reactants include C0 2 and clean water, wherein the clean water is a hot fluid and is reused for the wool washing process.
2、 根据权利要求 1所述的超声波破乳耦合超临界水氧化处理洗羊毛废水 的方法， 其特征在于， 所述的干净水回用于洗羊毛工艺， 包括下述歩骤： a、 将干净水送入一个换热器的壳侧， 换热器的管侧通软化水， 干净水被 软化水冷却， 同时加热软化水， 产生过热蒸汽；  2. The method for ultrasonically demulsification coupled supercritical water oxidation treatment of wool washing wastewater according to claim 1, wherein the clean water is used for the wool washing process, comprising the following steps: a, will be clean The water is sent to the shell side of a heat exchanger, and the tube side of the heat exchanger passes through the softened water, and the clean water is cooled by the softened water, and at the same time, the softened water is heated to generate superheated steam;
b、 被冷却的干净水输送至洗羊毛工艺单元重复利用。  b. The cooled clean water is transferred to the wool washing process unit for reuse.
3、 根据权利要求 2所述的超声波破乳耦合超临界水氧化处理洗羊毛废水 的方法， 其特征在于， 歩骤 a所述的过热蒸汽回用于洗羊毛工艺。  3. The method of ultrasonically demulsification coupled supercritical water oxidation treatment of wool washing wastewater according to claim 2, wherein the superheated steam described in step a is returned to the wool washing process.
4、 根据权利要求 1所述的超声波破乳耦合超临界水氧化处理洗羊毛废水 的方法， 其特征在于， 歩骤 （1 ) 所述的粗羊毛脂可直接售出。  The method for treating wool washing wastewater by ultrasonic demulsification coupled supercritical water oxidation according to claim 1, wherein the crude lanolin described in the step (1) can be directly sold.
5、 根据权利要求 1所述的超声波破乳耦合超临界水氧化处理洗羊毛废水 的方法， 其特征在于， 歩骤 （4) 所述的 C02回收后罐装出售。 The method for treating wool washing wastewater by ultrasonic demulsification coupled supercritical water oxidation according to claim 1, wherein the CO 2 2 described in the step (4) is recovered and canned for sale.
PCT/CN2012/085890 2012-04-23 2012-12-05 Method for treating wastewater resulting from wool-washing by coupling ultrasonic wave demulsification and supercritical water oxidation WO2013159534A1 (en)

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