WO2024045563A1 - 一种前驱体合成废水淡化系统 - Google Patents

一种前驱体合成废水淡化系统 Download PDF

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Publication number
WO2024045563A1
WO2024045563A1 PCT/CN2023/082260 CN2023082260W WO2024045563A1 WO 2024045563 A1 WO2024045563 A1 WO 2024045563A1 CN 2023082260 W CN2023082260 W CN 2023082260W WO 2024045563 A1 WO2024045563 A1 WO 2024045563A1
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Prior art keywords
wastewater
water
desalination
desalination system
reverse osmosis
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Ceased
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PCT/CN2023/082260
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English (en)
French (fr)
Inventor
陈维俱
李长东
杨云广
廖折军
徐灵聪
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Ningde Brunp Recycling Technology Co Ltd
Hunan Brunp Recycling Technology Co Ltd
Guangdong Brunp Recycling Technology Co Ltd
Original Assignee
Ningde Brunp Recycling Technology Co Ltd
Hunan Brunp Recycling Technology Co Ltd
Guangdong Brunp Recycling Technology Co Ltd
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Publication of WO2024045563A1 publication Critical patent/WO2024045563A1/zh
Anticipated expiration legal-status Critical
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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
    • 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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • 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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048—Purification of waste water by evaporation
    • 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
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C02F1/385—Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F2001/5218—Crystallization
    • 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
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/03—Pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/04—Oxidation reduction potential [ORP]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/05—Conductivity or salinity
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/42—Liquid level
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/10—Energy recovery
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

Definitions

  • This application relates to the technical field of wastewater treatment, for example, to a precursor synthesis wastewater desalination system.
  • Traditional treatment processes include stripping-frozen crystallization process, stripping-traditional deamination-freezing crystallization process, but the traditional treatment process has low treatment efficiency, high operating costs, low sodium sulfate recovery rate, high drainage salinity, and the existence of secondary pollution and other issues.
  • This application provides a precursor synthetic wastewater desalination system to achieve zero discharge of wastewater, effectively utilize the by-products generated during the treatment process, and achieve maximum recycling of resources.
  • the embodiment of the present application provides a precursor synthetic wastewater desalination system, including: a pretreatment system, a desalination system and a mechanical vapor recompression system;
  • the pretreatment system is configured to adjust and strip the wastewater for deamination, recycle the ammonia produced, and intercept and adjust the sediment in the wastewater after deamination;
  • the desalination system is configured to perform pressurized desalination on the deamination wastewater, generate fresh water and concentrated water, and store the fresh water;
  • the mechanical vapor recompression system is configured to evaporate the concentrated water generated by the desalination system to obtain condensed water and crystals, store the condensed water, and recover the crystals.
  • Figure 1 is a schematic structural diagram of a precursor synthetic wastewater desalination system provided by an embodiment of the present application
  • Figure 2 is a structural representation of the back end of a precursor synthetic wastewater desalination system provided by an embodiment of the present application. intention;
  • Figure 3 is a schematic structural diagram of the pretreatment system provided by the embodiment of the present application.
  • Pretreatment system 101.
  • Desalination system 102.
  • Mechanical vapor recompression system 104.
  • Monitoring system 106.
  • Oxidation-reduction potential probe 2. The first conductivity probe; 3. Pool level radar; 4. The first pipeline pressure probe; 5. The second pipeline pressure probe; 6. pH probe; 7. The second conductivity probe ; 8. Two sets of permeation membrane groups; 9. Single group of permeation membrane groups; 10. Collection tank; 11. Backwash system; 12. Storage tank; 13. Multi-stage reverse osmosis module;
  • the traditional precursor synthesis wastewater treatment system uses a steam stripping + freeze crystallization process. After the washing water is mixed with the mother liquor, the ammonia nitrogen in the wastewater decreases, which affects the efficiency of stripping to recover ammonia nitrogen. At the same time, it is necessary to increase the design processing capacity of stripping. Investment and operating costs increase.
  • the removal rate of sodium sulfate is about 50%, and the salt content in the drainage is about 50g/L, making it difficult to meet the increasingly stringent environmental emission standards.
  • the embodiment of this application proposes to use stripping to remove ammonia at the front end, and recover ammonia water for use in the front-end synthesis process.
  • the metal flocs are intercepted by a precision filter and recycled, and a mechanical vapor recompression (Mechanical Vapor Recompression, MVR) evaporation system is used at the same time.
  • MVR Mechanical Vapor Recompression
  • the concentrated water after the reverse osmosis membrane system is concentrated is evaporated, and the condensed water generated by evaporation is sent to the fresh water tank.
  • the crystallization is centrifuged and dried and sold as a by-product Yuanming powder.
  • the by-product Yuanming powder can be sold as chemical raw materials, and the by-product distilled water and desalination system 102 water are returned to the production process as raw water of the pure water system. Achieve zero wastewater discharge and waste recycling.
  • Figure 1 is a precursor synthetic wastewater desalination system provided by an embodiment of the present application, including: a pretreatment system 101, a desalination system 102, a monitoring system 104 and a mechanical vapor recompression system 103.
  • the pretreatment system 101 is configured to adjust and strip the wastewater for deamination, recycle the generated ammonia water, and intercept and adjust the sediment in the deaminated wastewater.
  • the pretreatment system 101 includes a value adjustment tank 21 , a deamination tower 22 , a filtration system 23 and a wastewater collection tank 24 .
  • the value adjustment pool 21 is configured to adjust the acid-base value of the wastewater.
  • the deamination tower 22 is configured to strip and deaminate the acid-base adjusted wastewater output from the adjustment pool 21 to generate ammonia water and deamination wastewater, and to recover the ammonia water generated after deamination.
  • the filtration system 23 is configured to intercept the metal floc sediment in the deamination wastewater generated in the deamination tower 22 .
  • the wastewater collection tank 24 is configured to collect the wastewater output by the filtration system 23 .
  • the wastewater collection tank 24 is also equipped with a first dosing device, and the first dosing device is configured to adjust the wastewater in the wastewater collection tank 24 .
  • the wastewater after value adjustment is sent to the deamination tower 22 for stripping and deamination, and the ammonia water is recovered (the concentration of the recovered ammonia water can reach 9%-10%).
  • the wastewater after deamination is collected by a precision filter to filter the metal
  • the flocculent sediments are intercepted, and the trapped metals are effectively recovered and put into the previous process for leaching and recycling.
  • the first dosing device is installed in the deamination wastewater collection tank 24 to adjust the value of the deamination wastewater so that the deamination wastewater reaches the standard for inclusion in the desalination system 102.
  • Figure 2 shows the desalination system 102, monitoring system 104 and mechanical vapor recompression system 103 at the backend of this embodiment.
  • the desalination system 102 is configured to perform pressurized desalination on the deaminated wastewater, generate fresh water and concentrated water, and store the fresh water.
  • the desalination system 102 includes: a reverse osmosis desalination system and a backwash system 11 .
  • the reverse osmosis desalination system is provided with a multi-stage reverse osmosis module 13 and a storage tank 12.
  • the multi-stage reverse osmosis module 13 is configured to perform pressurized desalination and desalination of the wastewater output from the pretreatment system 101, and controls the
  • the multi-stage reverse osmosis module 13 generates concentrated water at the pressurized end and fresh water at the other end;
  • the storage tank 12 is configured to store the desalinated desalinated water output by the multi-stage reverse osmosis module 13 .
  • the reverse osmosis membranes in the multi-stage reverse osmosis module 13 are arranged three-dimensionally with brackets, and the water in the multi-stage reverse osmosis module 13 flows by gravity to the storage tank 12 for storage.
  • reverse osmosis membrane is an important part of wastewater desalination and desalination.
  • Wastewater desalination water treatment reverse osmosis equipment uses a reverse osmosis membrane to separate water and salt in the water.
  • the reverse osmosis membrane is a semipermeable membrane. The solvent can pass through but the solute cannot.
  • On one side of the reverse osmosis membrane the incoming water is subjected to At high pressure, part of the pure water in the wastewater will pass through the reverse osmosis membrane to the other side, producing fresh water, and the salt will be discharged with the concentrated water.
  • the reverse osmosis membrane has high requirements for the quality of the raw water and requires relatively complex pretreatment. The pretreatment requirements are strict to ensure the service life of the reverse osmosis membrane.
  • the wastewater input to the desalination system 102 can also be further filtered by setting a security filter.
  • the security filter can use a 5um filter element to intercept impurities and ensure that The quality of the raw water in the desalination system 102 is improved, the failure rate of the reverse osmosis membrane is reduced, and the service life of the reverse osmosis membrane is improved.
  • the multi-stage reverse osmosis module 13 has a built-in two-stage reverse osmosis membrane system.
  • the first level is two groups of permeation membrane groups 8, and the other level is a single group of permeation module 9, which can efficiently desalinize the wastewater after deamination.
  • the backwash system 11 is configured to backwash the multi-stage reverse osmosis module 13 according to a preset time period, and recover metals in the backwash water generated by the backwash.
  • the backwash system 11 is installed below the desalination system 102, and backwashes the membrane group according to the programmed time.
  • the backwash wastewater is collected by the collection tank 10 below the desalination system 102.
  • the backwash wastewater contains a small amount of metal precipitates, which are recycled by the plate and frame machine.
  • the backwash system 11 is provided with a second dosing device, and the second dosing device is configured to provide bacteriostatic agent and scale inhibitor for the backwash system 11 .
  • the dosing frequency of the second dosing device is programmed by the software, and the size of the metering pump is fixed after debugging, and then adjusted according to subsequent water quality conditions.
  • Bacteriostats and scale inhibitors can provide protection to reverse osmosis membranes that undergo osmotic filtration for a long time, preventing scale stains from reducing the filtration efficiency of the reverse osmosis membrane caused by long-term filtration.
  • the precursor synthetic wastewater can be effectively desalinated, and on the premise of ensuring the quality of the desalinated wastewater, the failure rate of the reverse osmosis membrane can be effectively reduced and the service life can be extended.
  • the precursor synthetic wastewater desalination system in this embodiment also includes a monitoring system 104; the monitoring system 104 is configured to monitor the wastewater treatment process and water quality.
  • the monitoring system 104 includes a pool level radar 3, a pH probe 6, a flow rate probe, a first pipeline pressure probe 4, a second pipeline pressure probe 5, a first conductivity probe 2, and a second conductivity probe 7. and redox potential probe 1.
  • the front end of the input to the desalination system 102 is provided with a redox potential probe 1, a first conductivity probe 2, a pool level radar 3 and a first pipeline pressure probe 4, and the output rear end of the desalination system 102 is provided with a The second pipeline pressure probe 5, pH probe 6 and conductivity probe 7.
  • liquid level radar 3 of each pool ensures that the pool does not overflow
  • the pH probe 6 monitors the pH of fresh water to realize the automation of the dispensing system
  • the pipeline pressure probe and conductivity probe operate and operate the multi-stage reverse osmosis module 13 Work process monitoring ensures stable and safe operation of the device.
  • the mechanical vapor recompression system 103 is configured to evaporate the concentrated water generated by the desalination system 102 to obtain condensed water and crystals, store the condensed water, and recover the crystals.
  • the mechanical vapor recompression system 103 includes a centrifuge, an evaporator and a plate heat exchanger.
  • the mechanical vapor recompression system 103 (MVR system) of this embodiment includes a plate heat exchanger, an evaporator, a concentrator, a centrifuge and a mother liquor collection tank to evaporate the concentrated water generated by the desalination system 102.
  • the condensed water is drained to the fresh water tank, and the precipitated crystals are centrifuged and dried before being packaged and recycled.
  • the centrifuge is configured to centrifuge the concentrated water output from the desalination system 102 .
  • the evaporator is configured to evaporate the concentrated water after centrifugation to obtain evaporated water vapor and precipitated crystals.
  • the plate heat exchanger is configured to condense the evaporated water vapor to obtain condensed water.
  • the obtained condensed water can be used as production water together with the fresh water obtained in the desalination system.
  • the pretreatment system and desalination system in the system can be deaminated, adjusted, and penetrated.
  • the pure water system can purify the condensed water and output fresh water to obtain industrial or drinking water.
  • This application uses the front-end pretreatment system to recycle ammonia water and intercept most of the sediments to ensure the stable operation of the back-end desalination system, reduce the failure rate of the desalination system, ensure stable and long-lasting operation of the system, and at the same time, remove the deamination wastewater Desalination is carried out, and the generated fresh water is collected and recycled together with the condensed water generated by the mechanical vapor recompression system of concentrated water as production raw water.
  • the generated crystals are used as by-products. This not only achieves zero discharge of waste water, but also recycles the by-products generated during the treatment process. Effective utilization to achieve maximum recycling of resources. Design and production fully comply with the requirements of the green development concept in the new era.
  • this embodiment uses a method of combining a reverse osmosis membrane group with a mechanical vapor recompression system to recycle production wastewater. Reverse osmosis The concentrated water after membrane concentration is evaporated again, saving recycling costs.

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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)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Physical Water Treatments (AREA)

Abstract

本申请公开了一种前驱体合成废水淡化系统，包括：预处理系统、淡化系统和机械蒸汽再压缩系统；预处理系统，设置为将废水进行调值和汽提脱氨，并将产生的氨水进行回收，以及将脱氨后的废水进行沉淀物的截留与调值；淡化系统，设置为对脱氨后的废水进行加压脱盐，生成淡水和浓水；机械蒸汽再压缩系统，设置为将经过所述淡化系统生成的浓水进行蒸发，得到冷凝水和晶体，并将冷凝水进行存储，将晶体进行回收。

Description

一种前驱体合成废水淡化系统
本申请要求在2022年09月01日提交中国专利局、申请号为202211062261.7的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及废水处理技术领域，例如涉及一种前驱体合成废水淡化系统。
背景技术
三元前驱体生产过程中会产生大量废水，以往都是处理后进行外排，然后随着环保的要求越来越高，如何减少废水排放是一个重要的问题，因此需要对相关工艺产生的废水进行处理达到工业用水的水平，进行回用。
传统的处理工艺包括汽提-冷冻结晶工艺、汽提-传统脱氨-冷冻结晶工艺，但是采用传统处理工艺存在处理效率低，运行费用高、硫酸钠回收率低，排水盐分高、存在二次污染等问题。
发明内容
本申请提供了一种前驱体合成废水淡化系统，以实现废水零排放，并将处理过程产生的副产品进行有效利用，实现资源最大限度的循环利用。
本申请实施例提供了一种前驱体合成废水淡化系统，包括：预处理系统、淡化系统和机械蒸汽再压缩系统；
所述预处理系统，设置为将废水进行调值和汽提脱氨，并将产生的氨水进行回收，以及将脱氨后的废水进行沉淀物的截留与调值；
所述淡化系统，设置为对脱氨后的废水进行加压脱盐，生成淡水和浓水，并将淡水进行存储；
所述机械蒸汽再压缩系统，设置为将经过所述淡化系统生成的浓水进行蒸发，得到冷凝水和晶体，并将冷凝水进行存储，将晶体进行回收。
附图说明
图1为本申请实施例所提供的一种前驱体合成废水淡化系统的结构示意图；
图2为本申请实施例所提供的一种前驱体合成废水淡化系统后端的结构示 意图；
图3为本申请实施例所提供的预处理系统的结构示意图。
其中，说明书附图的附图标记如下：
101、预处理系统；102、淡化系统；103、机械蒸汽再压缩系统；104、监测系统；
1、氧化还原电位探头；2、第一电导率探头；3、水池液位雷达；4、第一管道压力探头；5、第二管道压力探头；6、pH探头；7、第二电导率探头；8、两组渗透膜组；9、单组渗透膜组；10、收集槽；11、反冲洗系统；12、储槽；13、多级反渗透模组；
21、调值水池；22、脱氨塔；23、过滤系统；24、废水收集池。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
传统前躯体合成废水处理系统采用汽提+冷冻结晶工艺，洗涤水与母液混合后废水中的氨氮降低，影响了汽提回收氨氮的效率，同时需要增大汽提的设计处理能力，汽提的投资和运行成本增加。采用冷冻结晶工艺时，硫酸钠的去除率约为50％，排水中盐分约为50g/L，难以满足日益严格的环保排放标准要求。
本申请实施例提出前端采用汽提脱氨，回收氨水打到前端合成工序使用，精密过滤器对金属絮状物截留，回收利用，同时使用机械蒸汽再压缩(Mechanical Vapor Recompression，MVR)蒸发系统，对反渗透膜系统浓缩后的浓水进行蒸发，蒸发产生的冷凝水至淡水箱，结晶离心干燥作为副产品元明粉对外出售。废水中的氨、重金属的回收及循环再利用；副产元明粉可作为化工原料外售，副产蒸馏水及淡化系统102产水作为纯水系统原水返回生产工序使用。实现废水零排放，废物再循环回收。
实施例一
请参照图1，为本申请实施例提供的一种前驱体合成废水淡化系统，包括：预处理系统101、淡化系统102、监测系统104和机械蒸汽再压缩系统103。
所述预处理系统101，设置为将废水进行调值和汽提脱氨，并将产生的氨水进行回收，以及将脱氨后的废水进行沉淀物的截留与调值。
可选的，如图3所示，所述预处理系统101包括调值水池21、脱氨塔22、过滤系统23和废水收集池24。
所述调值水池21，设置为对废水进行酸碱调值。
所述脱氨塔22，设置为对所述调值水池21输出经过酸碱调值的废水进行汽提脱氨，生成氨水和脱氨废水，并将脱氨后所产生的氨水进行回收。
所述过滤系统23，设置为将所述脱氨塔22中生成的脱氨废水进行金属絮状沉淀物的截留。
所述废水收集池24，设置为收集所述过滤系统23输出的废水。
可选的，所述废水收集池24还安装有第一加药装置，所述第一加药装置设置为对废水收集池24中的废水进行调值。
需要说明的是，调值后废水至脱氨塔22，汽提脱氨，将氨水进行回收(所回收的氨水浓度可达到9％-10％)，脱氨后废水收集由精密过滤器对金属絮状沉淀物进行截留，有效回收截留的金属，投入前工序浸出回收利用。同时，第一加药装置安装在脱氨后废水收集池24内，对脱氨后的废水进行调值，使脱氨后废水达到淡化系统102纳入的标准。
请参阅图2，其为本实施例后端的淡化系统102、监测系统104和机械蒸汽再压缩系统103。
所述淡化系统102，设置为对脱氨后的废水进行加压脱盐，生成淡水和浓水，并将淡水进行存储。
可选的，所述淡化系统102包括：反渗透淡化系统和反冲洗系统11。
所述反渗透淡化系统设置有多级反渗透模组13和储槽12，所述多级反渗透模组13设置为对所述预处理系统101输出的废水进行加压脱盐淡化，控制所述多级反渗透模组13在加压端生成浓水，在另一端生成淡水；所述储槽12设置为对所述多级反渗透模组13输出的脱盐淡化后的淡化水进行存储。
可选的，所述多级反渗透模组13中的反渗透膜采用支架立体分布，所述多级反渗透模组13的水通过重力流至所述储槽12进行存储。
需要说明的是，在前躯体合成废水淡化的处理过程中，反渗透膜是废水淡化脱盐的一个重要环节。废水淡化水处理反渗透设备是利用反渗透膜将水中水分与盐分分开，在反渗透膜是一种半透膜，溶剂能够透过而溶质不能透过，在反渗透膜一侧对进水施加高压，则废水中一部分纯水会透过反渗透膜到达另一侧，产出淡水，盐分随浓水排出。反渗透膜对原料水的水质要求较高，需要比较复杂的预处理，预处理要求严格，来保证反渗透膜的使用寿命。
作为本实施例的另一可选方案，在输入至淡化系统102之前，还能通过设置安保过滤器，来对输入淡化系统102的废水进行进一步过滤，安保过滤器可以采用5um滤芯截留杂质，保证到达淡化系统102内的原水水质，降低反渗透膜故障率，提高反渗透膜的使用命。
同时，淡化系统102中的多级反渗透模组13整体组件采用支架立体分布，减小占地面积，产生的淡水及浓水通过重力流至底部储槽进行存储。多级反渗透模组13内置两级反渗透膜系统，一级为两组渗透膜组8，另外一级为单组渗透模组9，对脱氨后废水进行高效脱盐。
所述反冲洗系统11，设置为根据预设时间周期，对所述多级反渗透模组13进行反冲洗，并对反冲洗所产生的反冲洗水中的金属进行回收。
需要说明的是，反冲洗系统11设置于淡化系统102下方，按照程序设定时间，对膜组进行反冲洗，反冲洗废水由淡化系统102下方收集槽10进行收集。反冲洗废水中含有少量金属沉淀物，由板框机进行回收利用。
可选的，所述反冲洗系统11中设置有第二加药装置，所述第二加药装置设置为为所述反冲洗系统11提供抑菌剂和阻垢剂。
需要说明的是，第二加药装置的加药频次由软件设定好程序进行，计量泵大小由调试后固定，依据后续水质情况再进行调整。抑菌剂和阻垢剂能够对长时间进行渗透过滤的反渗透膜提供保护作用，避免长时间的过滤导致垢渍对反渗透膜的过滤效率降低。
可以理解的是，通过上述预处理和淡化系统102的相互配合，可以有效对前躯体合成废水进行淡化，并且在保证淡化废水水质前提下，有效降低反渗透膜故障率，延长使用寿命。
可选的，本实施例中的前驱体合成废水淡化系统还包括监测系统104；所述监测系统104，设置为对废水处理过程进行监控以及水质监控。
可选的，所述监测系统104包括水池液位雷达3、pH探头6、流速探头、第一管道压力探头4、第二管道压力探头5、第一电导率探头2、第二电导率探头7和氧化还原电位探头1。
在本实施例中，输入至淡化系统102的前端设置有氧化还原电位探头1、第一电导率探头2、水池液位雷达3和第一管道压力探头4，淡化系统102的输出后端设置有第二管道压力探头5、pH探头6和电导率探头7。
需要说明的是，各水池液位雷达3液位计保证水池不溢流，pH探头6监控淡水pH，实现配药系统自动化，管道压力探头，电导率探头对多级反渗透模组13进行运行和工作过程监控，保证装置稳定安全运行。
所述机械蒸汽再压缩系统103，设置为将经过所述淡化系统102生成的浓水进行蒸发，得到冷凝水和晶体，并将冷凝水进行存储，将晶体进行回收。
可选的，所述机械蒸汽再压缩系统103包括离心机、蒸发器和板式换热器。
需要说明的是，本实施例的机械蒸汽再压缩系统103(MVR系统)，包括板式换热器、蒸发器、浓缩机、离心机和母液收集槽，对淡化系统102产生的浓水进行蒸发，冷凝水排至淡水箱，析出晶体离心干燥后打包回收。
所述离心机设置为对所述淡化系统102中输出的浓水进行离心处理。
所述蒸发器设置为对离心处理后的浓水进行蒸发，得到蒸发后的水蒸气和析出的晶体。
所述板式换热器设置为将蒸发后的水蒸气进行冷凝处理，得到冷凝水。
需要说明的是，得到的冷凝水可以和淡化系统中得到的淡水一起作为生产用水，反过来对系统中的预处理系统和淡化系统进行脱氨、调值和渗透等操作，但在实际的生产操作中，大部分冷凝水和淡化系统中得到的淡水均输入至外部的纯水系统，作为生产纯水系统原水；其中，纯水系统能够对冷凝水和输出的淡水进行净化，从而得到工业或生活用水。
实施以上实施例，具有如下效果：
本申请通过前端预处理系统，对氨水进行回收利用，并且对大部分沉淀物进行截留，保证后端淡化系统稳定运行，降低淡化系统的故障率，保证系统稳定持久运行，同时将脱氨后废水进行脱盐淡化，收集生成的淡水，并与浓水通过机械蒸汽再压缩系统生成的冷凝水一起回收作为生产原水，生成的结晶作为副产品，不仅实现了废水零排放，还将处理过程产生的副产品进行有效利用，实现资源最大限度的循环利用，设计和生产完全符合新时代绿色发展理念要求，并且，本实施例采用反渗透膜组与机械蒸汽再压缩系统结合的方法对生产废水进行回收，反渗透膜浓缩后的浓水再进行蒸发，节约了回收成本。

Claims (9)

  1. 一种前驱体合成废水淡化系统，包括：预处理系统、淡化系统和机械蒸汽再压缩系统；
    所述预处理系统，设置为将废水进行调值和汽提脱氨，并将产生的氨水进行回收，以及将脱氨后的废水进行沉淀物的截留与调值；
    所述淡化系统，设置为对脱氨后的废水进行加压脱盐，生成淡水和浓水，并将淡水进行存储；
    所述机械蒸汽再压缩系统，设置为将经过所述淡化系统生成的浓水进行蒸发，得到冷凝水和晶体，并将冷凝水进行存储，将晶体进行回收。
  2. 如权利要求1所述的一种前驱体合成废水淡化系统，其中，所述预处理系统包括调值水池、脱氨塔、过滤系统和废水收集池；
    所述调值水池，设置为对废水进行酸碱调值；
    所述脱氨塔，设置为对所述调值水池输出经过酸碱调值的废水进行汽提脱氨，生成氨水和脱氨废水，并将脱氨后所产生的氨水进行回收；
    所述过滤系统，设置为将所述脱氨塔中生成的脱氨废水进行金属絮状沉淀物的截留；
    所述废水收集池，设置为收集所述过滤系统输出的废水。
  3. 如权利要求2所述的一种前驱体合成废水淡化系统，其中，所述废水收集池还安装有第一加药装置，所述第一加药装置设置为对废水收集池中的废水进行调值。
  4. 如权利要求1所述的一种前驱体合成废水淡化系统，其中，所述淡化系统包括：反渗透淡化系统和反冲洗系统；
    所述反渗透淡化系统设置有多级反渗透模组和储槽，所述多级反渗透模组设置为对所述预处理系统输出的废水进行加压脱盐淡化，控制所述多级反渗透模组在加压端生成浓水，在另一端生成淡水；所述储槽设置为对所述多级反渗透模组输出的脱盐淡化后的淡化水进行存储；
    所述反冲洗系统，设置为根据预设时间周期，对所述多级反渗透模组进行反冲洗，并对反冲洗所产生的反冲洗水中的金属进行回收。
  5. 如权利要求4所述的一种前驱体合成废水淡化系统，其中，所述反冲洗系统中设置有第二加药装置，所述第二加药装置设置为为所述反冲洗系统提供抑菌剂和阻垢剂。
  6. 如权利要求4所述的一种前驱体合成废水淡化系统，其中，所述多级反 渗透模组中的反渗透膜采用支架立体分布，所述多级反渗透模组的水通过重力流至所述储槽进行存储。
  7. 如权利要求1所述的一种前驱体合成废水淡化系统，还包括：监测系统；所述监测系统设置为对废水处理过程进行监控以及水质监控。
  8. 如权利要求7所述的一种前驱体合成废水淡化系统，其中，所述监测系统包括水池液位雷达、pH探头、流速探头、第一管道压力探头、第二管道压力探头、第一电导率探头、第二电导率探头和氧化还原电位探头。
  9. 如权利要求1所述的一种前驱体合成废水淡化系统，其中，所述机械蒸汽再压缩系统包括离心机、蒸发器和板式换热器；
    所述离心机，设置为对所述淡化系统中输出的浓水进行离心处理；
    所述蒸发器，设置为对离心处理后的浓水进行蒸发，得到蒸发后的水蒸气和析出的晶体；
    所述板式换热器，设置为将蒸发后的水蒸气进行冷凝处理，得到冷凝水。
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CN114230084A (zh) * 2021-12-29 2022-03-25 深圳市瑞升华科技股份有限公司 一种三元前驱体废水处理设备及工艺
CN115417547A (zh) * 2022-09-01 2022-12-02 宁德邦普循环科技有限公司 一种前驱体合成废水淡化系统

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