High-salinity wastewater resourceful treatment system

Abstract

The utility model discloses a high-salinity wastewater resourceful treatment system. The high-salinity wastewater resourceful treatment system comprises a water sample detection and analysis system, a pretreatment system, an ozonization system, an ultrafiltration membrane system, a reverse osmosis system, a membrane distillation system, an electrolytic hydrogen production system, an ozone generation system and an evaporation system. Only reverse osmosis pure water, membrane distillation high-purity water, high-purity hydrogen and evaporated solid residues are generated in the whole process, zero emission of high-salinity wastewater is achieved, membrane distillation, electrolytic hydrogen production and ozonized water treatment are combined for the first time, and cyclic utilization of resources such as water and oxygen is achieved while zero emission of wastewater is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of industrial wastewater resource utilization technology, and specifically relates to a high-salinity wastewater resource treatment system. Background Technology

[0002] Industrial high-salinity wastewater, such as desulfurization wastewater, oilfield produced water, reverse osmosis concentrate, gasification ash water, and boiler blowdown, has a complex composition and is mainly classified into two categories: organic matter and inorganic salts, including potassium (K). + Ca 2+ Na + Mg 2+ CO3 2- NO3 2- Cl - SO4 2- Suspended oils, emulsified oils, dissolved oils, low-carbon organic matter, heavy metals, cyanides, aromatic and heterocyclic compounds, radioactive elements, etc. These substances are difficult to discharge or reuse through simple treatment.

[0003] Chinese Patent Application No. CN201610457392.3 discloses a wastewater treatment system and a wastewater treatment method. The wastewater treatment system includes: a pretreatment system that regulates and settles wastewater to obtain pretreated wastewater; a first treatment system that performs anaerobic treatment and microbial interception on the pretreated wastewater, and then softens and filters the microbially intercepted wastewater through membrane filtration to obtain softened membrane filtered effluent; and a second treatment system that converts free ammonia in the softened membrane filtered effluent into ammonium ions to obtain converted effluent, and then performs high-pressure reverse osmosis treatment, material separation treatment, and evaporation crystallization treatment on the converted effluent. This wastewater treatment system, in its technical process, achieves relatively thorough removal of specific pollutants in each treatment unit, while simultaneously creating favorable treatment conditions for subsequent units, forming an innovative and complete combined process. However, this invention cannot achieve "zero discharge" of wastewater. Utility Model Content

[0004] This invention provides a high-salinity wastewater resource utilization system that can achieve "zero discharge" of high-salinity wastewater.

[0005] To solve the above-mentioned technical problems, this utility model provides a high-salinity wastewater resource utilization treatment system, comprising:

[0006] Water sample testing and analysis system: It samples and analyzes high-salinity wastewater to obtain the pH, COD, TDS, hardness, and content range of various pollutants in the high-salinity wastewater; the water sample testing and analysis system is connected to the pretreatment system through pipelines;

[0007] Pretreatment system: It pretreats the high-salt wastewater after testing and analysis to obtain supernatant and pretreatment concentrate. The pretreatment system is connected to the ozonation system and the evaporation system through pipelines. The supernatant enters the next-stage ozonation system and the pretreatment concentrate enters the evaporation system.

[0008] Ozone oxidation system: It uses an ozone aeration device to make the supernatant fully contact with ozone to obtain ozonated effluent and ozonated concentrate. The ozonation system is connected to the ultrafiltration membrane system and the evaporation system through pipelines. The ozonated effluent enters the next stage ultrafiltration system, and the ozonated concentrate enters the evaporation system.

[0009] Ultrafiltration membrane system: It filters the ozonated effluent to obtain ultrafiltration membrane effluent and ultrafiltration membrane concentrate. The ultrafiltration membrane system is connected to the reverse osmosis system and the evaporation system through pipelines. The ultrafiltration membrane effluent enters the next stage of the reverse osmosis system, and the ultrafiltration membrane concentrate enters the evaporation system.

[0010] Reverse osmosis system: It performs reverse osmosis treatment on the ultrafiltration membrane effluent to obtain reverse osmosis high-purity water and reverse osmosis concentrate. The reverse osmosis system is connected to the membrane distillation system through pipelines.

[0011] Membrane distillation system: It performs membrane distillation treatment on the reverse osmosis concentrate to obtain membrane distilled high-purity water and membrane distillation concentrate. The membrane distillation system is connected to the electrolytic hydrogen production system and the evaporation system through pipelines. The membrane distilled high-purity water enters the next stage electrolytic hydrogen production system, and the membrane distillation concentrate enters the evaporation system.

[0012] Electrolytic hydrogen production system: It electrolyzes the membrane distilled high-purity water to produce hydrogen and oxygen. The electrolytic hydrogen production system is connected to the ozone generation system through a pipeline, and the oxygen enters the ozone generation system.

[0013] Ozone generation system: The ozone generation system is connected to the ozonation system via a pipeline. It generates an ozone mixture from oxygen and delivers it to the ozonation system through the pipeline.

[0014] Evaporation system: It evaporates the pretreated concentrate, ozonation concentrate, ultrafiltration membrane concentrate and membrane distillation concentrate to obtain solid residue.

[0015] Furthermore, in the ozonation system, the ozone aeration device is a multi-stage ozone aeration device.

[0016] Furthermore, the ultrafiltration membrane system includes an ultrafiltration circulation pump, which changes the permeate flux and permeate quality by adjusting the flow rate and pressure of the ultrafiltration circulation pump.

[0017] Furthermore, the reverse osmosis system includes a high-pressure pump, and the reverse osmosis system adjusts the flow rate of the concentrate and the system recovery rate by controlling the operating pressure of the high-pressure pump.

[0018] Furthermore, the ozone generation system includes an ozone generator, which converts the oxygen collected by the electrolytic hydrogen production system into an ozone mixture and transports it through pipelines to the ozonation system for use.

[0019] Compared with the prior art, the present invention has the following technical effects:

[0020] 1. The present invention provides a high-salt wastewater resource utilization system, which achieves zero wastewater discharge by combining membrane distillation with electrolytic hydrogen production and ozonation water treatment, and also achieves the recycling of water and oxygen. The water resource utilization rate of the entire system is greater than 85%.

[0021] 2. The ozonation system of this utility model, by setting up a multi-stage ozone aeration device, can realize the stepwise oxidation of the supernatant produced by the pretreatment system, thereby improving the reaction efficiency and product quality.

[0022] 3. In the water electrolysis hydrogen production system of this utility model, the by-product oxygen is transported to the ozonation system through pipelines. Ozone is generated in situ from the oxygen and used for the pretreatment of the water entering the water production system, which saves costs and realizes the reuse of resources. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a high-salinity wastewater resource utilization system according to the present invention. Detailed Implementation

[0024] The following will refer to the appendix in the embodiments of this utility model. Figure 1 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] It should be understood that the step numbers used in the text are for ease of description only and are not intended to limit the order in which the steps are performed.

[0026] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0028] The term “and / or” refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes these combinations.

[0029] Example 1

[0030] This utility model provides a high-salinity wastewater resource utilization treatment system, such as... Figure 1 As shown, it includes:

[0031] Water sample testing and analysis system: It samples and analyzes high-salinity wastewater to obtain the pH, COD, TDS, hardness, and content range of various pollutants in the high-salinity wastewater; the water sample testing and analysis system is connected to the pretreatment system through pipelines;

[0032] Pretreatment system: It pretreats the high-salt wastewater after testing and analysis to obtain supernatant and pretreatment concentrate. The pretreatment system is connected to the ozonation system and the evaporation system through pipelines. The supernatant enters the next-stage ozonation system and the pretreatment concentrate enters the evaporation system.

[0033] The pretreatment process may include softening, flocculation and sedimentation.

[0034] Ozone oxidation system: It uses an ozone aeration device to make the supernatant fully contact with ozone to remove most of the remaining heavy metal salts in the wastewater and reduce the COD value of the wastewater, to obtain ozonated effluent and ozonated concentrate. The ozonated system is connected to the ultrafiltration membrane system and the evaporation system through pipelines. The ozonated effluent enters the next stage of the ultrafiltration system, and the ozonated concentrate enters the evaporation system.

[0035] In one specific embodiment, the ozone aeration device is a multi-stage ozone aeration device, which can realize the stepwise oxidation of the supernatant generated by the pretreatment system, thereby improving the efficiency of the oxidation reaction and the quality of the product.

[0036] Ultrafiltration membrane system: It filters the ozonated effluent to remove suspended solids, macromolecular polymers and bacteria, and obtains ultrafiltration membrane effluent and ultrafiltration membrane concentrate. The ultrafiltration membrane system is connected to the reverse osmosis system and the evaporation system through pipelines. The ultrafiltration membrane effluent enters the next stage of the reverse osmosis system, and the ultrafiltration membrane concentrate enters the evaporation system.

[0037] In one specific embodiment, the ultrafiltration membrane system includes an ultrafiltration circulation pump. In this embodiment, the permeate flux and permeate quality of the ultrafiltration membrane system are changed by adjusting the flow rate and pressure of the ultrafiltration circulation pump.

[0038] Reverse osmosis system: It performs reverse osmosis treatment on the ultrafiltration membrane effluent to obtain reverse osmosis high-purity water and reverse osmosis concentrate. The reverse osmosis system is connected to the membrane distillation system through pipelines.

[0039] In one specific embodiment, the reverse osmosis system includes an RO protection filter and an RO membrane module, and the reverse osmosis system uses the RO protection filter and the RO membrane module to perform reverse osmosis treatment on the ultrafiltration membrane effluent;

[0040] In this embodiment, the reverse osmosis system includes a high-pressure pump, and the flow rate of the ultrafiltration membrane concentrate and the system recovery rate are adjusted by controlling the operating pressure of the high-pressure pump.

[0041] Membrane distillation system: It performs membrane distillation treatment on the reverse osmosis concentrate to obtain membrane distilled high-purity water and membrane distillation concentrate. The membrane distillation system is connected to the electrolytic hydrogen production system and the evaporation system through pipelines. The membrane distilled high-purity water enters the next stage electrolytic hydrogen production system, and the membrane distillation concentrate enters the evaporation system.

[0042] Electrolytic hydrogen production system: It electrolyzes the membrane distilled high-purity water to produce hydrogen and oxygen. The electrolytic hydrogen production system is connected to the ozone generation system through a pipeline, and the oxygen enters the ozone generation system.

[0043] Ozone generation system: The ozone generation system is connected to the ozonation system via a pipeline. It generates an ozone mixture from oxygen and delivers it to the ozonation system through the pipeline.

[0044] In one specific embodiment, the ozone generation system includes an ozone generator that converts oxygen collected by the electrolytic hydrogen production system into an ozone mixture and delivers it to the ozonation system for use via pipeline.

[0045] In the ozone generation system, oxygen can be converted into an ozone mixture using a corona discharge method.

[0046] Evaporation system: It evaporates the pretreated concentrate, ozonation concentrate, ultrafiltration membrane concentrate and membrane distillation concentrate to obtain solid residue.

[0047] In one specific embodiment, a method for resource recovery treatment of high-salinity wastewater is provided, comprising the following steps:

[0048] Water sample testing and analysis: High-salinity wastewater is sampled and analyzed to obtain the pH, COD, TDS, hardness, and content range of various pollutants in the high-salinity wastewater;

[0049] Pretreatment: The high-salinity wastewater that has been tested and analyzed is pretreated to remove most of the ions in the high-salinity wastewater and generate insoluble substances that settle to obtain supernatant and pretreatment concentrate.

[0050] Ozone treatment: The supernatant is brought into full contact with ozone using an ozone aeration device to remove most of the remaining heavy metal salts in the pretreated precipitate and reduce the COD value, resulting in ozonated effluent and ozonated concentrate.

[0051] Ultrafiltration membrane treatment: The ozonation effluent is filtered to obtain ultrafiltration membrane effluent and ultrafiltration membrane concentrate;

[0052] Reverse osmosis treatment: The ultrafiltration membrane effluent is subjected to reverse osmosis treatment to obtain reverse osmosis high-purity water and reverse osmosis concentrate;

[0053] Membrane distillation treatment: The reverse osmosis concentrate is subjected to membrane distillation treatment to obtain membrane distilled high-purity water and membrane distillation concentrate;

[0054] Electrolytic hydrogen production: Electrolytic hydrogen production is carried out on the membrane distilled high-purity water to obtain and collect high-purity hydrogen and oxygen;

[0055] Ozone generation: In an ozone generator, oxygen collected during the electrolysis hydrogen production process is converted into ozone mixture using corona discharge method, and then transported through pipeline to the ozone aeration device for ozonation treatment.

[0056] Evaporation treatment: The pretreatment concentrate, ozonation concentrate, ultrafiltration membrane concentrate, and membrane distillation concentrate are evaporated to obtain solid residues.

[0057] This invention achieves zero wastewater discharge by combining membrane distillation with electrolytic hydrogen production and ozonation water treatment, while also enabling the recycling of water and oxygen. The overall water resource utilization rate of the system is greater than 85%.

[0058] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0059] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-salinity wastewater resource utilization treatment system, characterized in that, include: Water sample testing and analysis system: It samples and analyzes high-salinity wastewater to obtain the pH, COD, TDS, hardness, and content range of various pollutants in the high-salinity wastewater; the water sample testing and analysis system is connected to the pretreatment system through pipelines; Pretreatment system: It pretreats the high-salt wastewater after testing and analysis to obtain supernatant and pretreatment concentrate. The pretreatment system is connected to the ozonation system and the evaporation system through pipelines. The supernatant enters the next-stage ozonation system and the pretreatment concentrate enters the evaporation system. Ozone oxidation system: It uses an ozone aeration device to make the supernatant fully contact with ozone to obtain ozonated effluent and ozonated concentrate. The ozonation system is connected to the ultrafiltration membrane system and the evaporation system through pipelines. The ozonated effluent enters the next stage ultrafiltration system, and the ozonated concentrate enters the evaporation system. Ultrafiltration membrane system: It filters the ozonated effluent to obtain ultrafiltration membrane effluent and ultrafiltration membrane concentrate. The ultrafiltration membrane system is connected to the reverse osmosis system and the evaporation system through pipelines. The ultrafiltration membrane effluent enters the next stage of the reverse osmosis system, and the ultrafiltration membrane concentrate enters the evaporation system. Reverse osmosis system: It performs reverse osmosis treatment on the ultrafiltration membrane effluent to obtain reverse osmosis high-purity water and reverse osmosis concentrate. The reverse osmosis system is connected to the membrane distillation system through pipelines. Membrane distillation system: It performs membrane distillation treatment on the reverse osmosis concentrate to obtain membrane distilled high-purity water and membrane distillation concentrate. The membrane distillation system is connected to the electrolytic hydrogen production system and the evaporation system through pipelines. The membrane distilled high-purity water enters the next stage electrolytic hydrogen production system, and the membrane distillation concentrate enters the evaporation system. Electrolytic hydrogen production system: It electrolyzes the membrane distilled high-purity water to produce hydrogen and oxygen. The electrolytic hydrogen production system is connected to the ozone generation system through a pipeline, and the oxygen enters the ozone generation system. Ozone generation system: The ozone generation system is connected to the ozonation system via a pipeline. It generates an ozone mixture from oxygen and delivers it to the ozonation system through the pipeline. Evaporation system: It evaporates the pretreated concentrate, ozonation concentrate, ultrafiltration membrane concentrate and membrane distillation concentrate to obtain solid residue.

2. The high-salinity wastewater resource utilization treatment system according to claim 1, characterized in that, In the ozonation system, the ozone aeration device is a multi-stage ozone aeration device.

3. The high-salinity wastewater resource utilization treatment system according to claim 1, characterized in that, The ultrafiltration membrane system includes an ultrafiltration circulation pump, which changes the permeate flux and permeate quality by adjusting the flow rate and pressure of the ultrafiltration circulation pump.

4. The high-salinity wastewater resource utilization treatment system according to claim 1, characterized in that, The reverse osmosis system includes a high-pressure pump, and the reverse osmosis system regulates the flow rate of the concentrate and the system recovery rate by controlling the operating pressure of the high-pressure pump.

5. The high-salinity wastewater resource utilization treatment system according to claim 1, characterized in that, The ozone generation system includes an ozone generator, which converts oxygen collected by the electrolytic hydrogen production system into an ozone mixture and transports it through pipelines to the ozone oxidation system for use.

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