An integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C

Abstract

This utility model relates to the field of water treatment technology, and in particular to an integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C. The system includes a raw water collection tank, a heat exchanger, a static mixer, a self-cleaning filter, an ozone oxidation treatment unit, an air flotation unit, a thickening tank unit, a tubular microfiltration membrane device, a clear water tank module, and a pipeline network. The system is integrated within multiple standardized containers, with the water treatment equipment and components housed within the containers. The air flotation device and ozone catalytic tower are located in the external space. Through the integration of flocculation, self-cleaning filtration, ozone oxidation, air flotation, and tubular microfiltration processes, and employing a modular container design, the system is equipped with electric heating and composite insulation structures to achieve efficient decontamination and freeze protection. Simultaneously, the use of air flotation + flocculation + tubular microfiltration processes efficiently removes suspended solids, operates automatically, and is adapted to extremely cold environments. The pipelines and equipment utilize composite insulation technology to ensure stable operation at low temperatures.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to an integrated water treatment system suitable for cold regions with temperatures as low as -60°C. Background Technology

[0002] Integrated water treatment systems are becoming increasingly advanced, playing a vital role in modern wastewater treatment due to their advantages such as small footprint, high compressive strength, convenient maintenance, long service life, beautiful appearance, stable effluent quality, reduced project investment, high flexibility, simple operation, strong adaptability, energy saving and environmental protection, and wide range of applications.

[0003] High-altitude and cold regions have low average annual temperatures, with winter temperatures reaching as low as -60 degrees Celsius or even lower. These regions have low air pressure and thin air, which places special demands on wastewater treatment systems. Low temperatures significantly affect the activity of microorganisms, leading to low efficiency of traditional biological treatment processes. Therefore, more stable physical, chemical, and advanced oxidation water treatment technologies are needed. However, high-altitude and cold regions face problems such as large heat loss and equipment freezing. In addition, civil engineering costs are high in some high-altitude and cold regions. Adding insulation sheds or greenhouses requires a large area, is costly, and is inconvenient to manage.

[0004] Therefore, in order to address the above problems, this utility model proposes an integrated water treatment system suitable for cold regions with temperatures as low as -60°C, in order to remove pollutants from the water and ensure that the quality of the effluent meets the relevant standards. Utility Model Content

[0005] To overcome the problems of low temperature, equipment freezing, and low efficiency of traditional processes in high-altitude and cold regions, this utility model proposes an integrated water treatment system suitable for high-altitude and cold regions with temperatures as low as -60°C.

[0006] The technical solution of this utility model is: an integrated water treatment system suitable for high-altitude and cold regions with temperatures as low as -60℃, comprising a raw water collection tank, a heat exchanger, a static mixer, a self-cleaning filter, an ozone oxidation treatment unit, an air flotation unit, a thickening tank unit, a tubular microfiltration membrane device, a clear water tank module, and a pipeline network; the system is integrated in multiple standardized containers, wherein the water treatment equipment and components are arranged inside the containers, while the air flotation device and the ozone catalytic tower are placed in the external space, and fluid transmission and control between the functional areas are realized through the pipeline network, and the units are connected through the pipeline network.

[0007] Preferably, the raw water collection tank is connected to the raw water inlet pipeline for collecting and storing raw water and regulating the quality and quantity of incoming water. The heat exchanger is connected to the raw water collection tank, and wastewater is transported to the heat exchanger by a booster pump for heating.

[0008] Preferably, one set of the static mixer is connected to the outlet pipe of the raw water tank booster pump and the dosing pipe, and the other set is connected to the air flotation effluent. By adding chemicals, the pH value of the raw water is adjusted and reacts with pollutants in the water to form precipitates. The self-cleaning filter is connected to the downstream pipe of the static mixer to intercept larger particles in the water. When the self-cleaning filter becomes clogged due to long-term filtration, the self-cleaning filter will automatically discharge the blockage to the thickening tank.

[0009] Preferably, the ozone oxidation treatment unit consists of an ozone preparation system and an ozone oxidation tower. The ozone preparation system provides the ozone source, and the ozone oxidation tower is connected to the outlet pipeline of the self-cleaning filter. In the ozone oxidation tower, the raw water and ozone react, and the pollutants and impurities in the water are oxidized or degraded. The ozone that has not reacted enters the ozone destruction device and is converted into oxygen.

[0010] Preferably, the flotation unit is connected to the outlet pipe of the ozone oxidation tower. By adding coagulant and flocculation agents to the water, the generated microbubbles adsorb oily substances and suspended solids, causing them to float and separate.

[0011] Preferably, the thickening tank unit is connected to the air flotation effluent pipeline. The raw water treated by air flotation first enters the static mixer and then enters the thickening tank unit. The suspended solids in the water form flocs, and solid-liquid separation is performed in the unit to further remove the suspended solids in the wastewater. The sludge thickener dewaters the sludge into sludge cakes for disposal. The filtrate enters the filtrate collection tank and is pumped to the raw water collection tank.

[0012] Preferably, the tubular microfiltration membrane device comprises a dosing system, a cleaning agent storage tank, and a heat exchanger. The dosing system delivers the cleaning agent to the cleaning agent storage tank. The cleaning solution is heated by the heat exchanger and then used to backwash the membrane module. The tubular microfiltration membrane device is connected to the effluent pipe of the concentration tank and is used to filter out most of the solid suspended matter in the water. The water produced by the tubular microfiltration membrane enters the clear water tank module.

[0013] Preferably, the clear water tank module is used to store the effluent from the tubular microfiltration membrane device to ensure that the water quality meets the standards.

[0014] Preferably, the pipeline network is made of plastic, and each unit connecting pipeline is equipped with electric heat tracing, rubber and plastic sponge and aluminum sheet insulation layer.

[0015] Preferably, the insulation and heat insulation treatment is applied to each container body, air flotation equipment, ozone catalytic oxidation tower and pipeline network. Each container body, air flotation equipment and ozone catalytic oxidation tower are insulated using a combination of steel plates, rock wool and aviation aerogel. The pipeline network is insulated and heat-insulated using a combination of electric heat tracing, rubber and plastic sponge and aluminum sheet.

[0016] The beneficial effects of this utility model are:

[0017] 1. In an integrated water treatment system, the front-end treatment technology includes a combination of flocculation sedimentation, self-cleaning filter, and ozone. By adding chemicals, pollutants can react to form flocs. Calcium and magnesium ions in the wastewater will react to form insoluble precipitates, thus separating them from the water. Suspended solids in the water are removed by a fully automatic self-cleaning filter. The self-cleaning filter has a small footprint, a high degree of automation, and is easy to operate. Ozone oxidation can oxidize and degrade some organic pollutants in the water, further removing impurities from the water.

[0018] 2. In integrated water treatment systems, downstream treatment technologies include a combination of air flotation, flocculation sedimentation, and tubular microfiltration membranes. Air flotation significantly reduces suspended solids and turbidity in water, particularly effective for low-density, difficult-to-settle pollutants. After air flotation, coagulation and flocculation agents are added to further remove suspended solids and other ionic impurities. Tubular microfiltration membranes effectively trap suspended particles, colloids, large organic molecules, bacteria, and microorganisms, achieving high-precision filtration of wastewater. Furthermore, tubular microfiltration plants are highly automated and adaptable to changes in raw water quality. The tubular microfiltration membrane has strong power and stable water quality. At the same time, it has high resistance to fouling and oxidation, as well as high acid and alkali resistance, resulting in a relatively long service life. This makes the equipment easier to clean and reduces maintenance costs. The container bodies, air flotation equipment, ozone catalytic oxidation tower, and pipeline network are all insulated using a combination of steel plates, rock wool, and aviation aerogel. The pipeline network is insulated and heat-insulated using a combination of electric heat tracing, rubber and plastic sponge, and aluminum sheet. The insulation and heat insulation treatment ensures the operation of the water treatment system and avoids the situation of excessively low water temperature in cold environments.

[0019] 3. The above-mentioned integrated water treatment system suitable for high-altitude and cold regions with temperatures as low as -60°C proposes a highly adaptable, green, efficient, and automated water treatment technology based on environmental characteristics. At the same time, due to its short construction period, minimal impact, and small footprint, it reduces the damage to the surrounding environment during construction to a certain extent, meeting the requirements of green construction. Attached Figure Description

[0020] Figure 1 The diagram shown is a schematic representation of the system framework of this utility model.

[0021] Figure 2 The diagram shown is a schematic representation of the workflow of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0023] Please see Figure 1 This utility model provides an embodiment: an integrated water treatment system suitable for high-altitude and cold regions with temperatures as low as -60°C, comprising a raw water collection tank, a heat exchanger, a static mixer, a self-cleaning filter, an ozone oxidation treatment unit, an air flotation unit, a thickening tank unit, a tubular microfiltration membrane device, a clear water tank module, and a pipeline network; the system is integrated in multiple standardized containers, wherein the water treatment equipment and components are arranged inside the containers, while the air flotation device and the ozone catalytic tower are placed in the external space, and fluid transmission and control between the functional areas are realized through the pipeline network, and the units are connected through the pipeline network.

[0024] Furthermore, this utility model provides an embodiment for a wastewater purification project of a Russian company, which is described in detail below:

[0025] The treatment process sequentially involves a raw water collection tank, heat exchanger preheating, preliminary flocculation, self-cleaning filter filtration, ozone generation and injection for advanced oxidation reaction, ozone destruction device to ensure the harmless treatment of residual ozone, followed by air flotation unit to separate impurities and flocs, coagulation and flocculation in static mixer followed by sedimentation in thickening tank, sludge further thickening through sludge dewatering equipment, and filtrate collected in water tank and returned to the raw water tank. Finally, the effluent from the thickening tank undergoes deep filtration using tubular microfiltration membranes to thoroughly remove residual micro-impurities, ensuring that the effluent quality meets relevant standards. The tubular microfiltration membrane cleaning system cleans the membrane components according to the operating conditions to ensure their normal operation.

[0026] The raw water collection tank is connected to the raw water inlet pipeline and is used to collect and store raw water, and to regulate the quality and quantity of the incoming water. The raw water collection tank is a steel structure, and the wastewater volume is 100m³. 3 / h, transported to the subsequent processing unit via two booster pumps.

[0027] The heat exchanger is connected to the raw water collection tank. Wastewater is pumped to the heat exchanger for heating via a lift pump. The heat exchanger is a plate heat exchanger, with hot water entering from the top and exiting from the bottom, and cold water entering from the bottom and exiting from the top.

[0028] One set of static mixers is connected to the outlet pipe of the raw water tank booster pump and the dosing pipe, and the other set is connected to the air flotation effluent. By adding acid, alkali, PAC and PAM, the pH value of the raw water is adjusted and reacted with the pollutants in the water to form precipitates for removal, so as to ensure the treatment effect of the subsequent units. The static mixer is made of PVC-U and has a diameter of 150mm.

[0029] The self-cleaning filter is connected to the downstream pipeline of the static mixer to trap larger particles in the water, preventing blockage and damage to subsequent treatment units. When the self-cleaning filter becomes clogged due to prolonged filtration, it will automatically discharge the blockage to the thickening tank. The self-cleaning filter has a processing capacity of 100 m3 / h, an operating pressure of 0.1-1.6 MPa, and a power of 1.1 kW. A total of two self-cleaning filters are in operation.

[0030] The ozone oxidation treatment unit consists of an ozone preparation system and an ozone oxidation tower. The ozone preparation system provides the ozone source, and the ozone oxidation tower is connected to the outlet pipeline of the self-cleaning filter. In the ozone oxidation tower, raw water and ozone react, and pollutants and impurities in the water are oxidized or degraded. The ozone that has not reacted enters the ozone destruction device and is converted into oxygen. The ozone oxidation treatment unit is an ozone catalytic oxidation tower with a steel structure and ceramic Pall rings as the catalytic packing. The tower has a diameter of 1.3m and a height of 8.5m. The ozone generator has an ozone output of 2000g / h, and the ozone tail gas destruction device has a processing capacity of 200m3 / h.

[0031] The air flotation unit is connected to the effluent pipeline of the ozone oxidation tower. By adding coagulant and flocculation agents to the water, the generated microbubbles adsorb oily substances and suspended solids, causing them to float and be removed. The air flotation equipment includes a main body, PAC and PAM mixers, scum scrapers, and a matching air compressor with an air production flow rate Q of 8m³ / h. 3 / min, air pressure 0.7Mpa, power 55KW, the air flotation machine can treat up to 100m3 / h of water.

[0032] The thickening tank unit is connected to the flotation effluent pipeline. The raw water treated by flotation first enters the front mixer and then enters the thickening tank unit. The suspended solids in the water form flocs, and solid-liquid separation is performed in this unit to further remove the suspended solids in the wastewater. The sludge thickener dewaters the sludge into sludge cakes for disposal. The filtrate enters the filtrate collection tank and is pumped to the raw water collection tank. The wastewater first enters two static mixers, where PAC and PAM agents are added respectively. The static mixers are made of PVC-U and have a diameter of 250mm. The thickening tank unit is a steel structure.

[0033] The tubular microfiltration membrane cleaning system comprises a dosing system, a cleaning agent storage tank, and a heat exchanger. The dosing system delivers the cleaning agent to the cleaning agent storage tank. The cleaning solution is heated by the heat exchanger and then used to backwash the membrane module. The heat exchanger is a plate heat exchanger, with hot water entering from the top and exiting from the bottom, and cold water entering from the bottom and exiting from the top. The cleaning agents include hydrochloric acid, sodium hydroxide, and sodium hypochlorite.

[0034] The tubular microfiltration membrane device draws heated wastewater into the device, which filters out most of the suspended solids. The device comprises six membrane treatment systems, equipped with a circulation pump and a chemical cleaning system, with a single membrane treatment capacity of 17m³. 3 / h.

[0035] The clear water tank module is used to store the water effluent from the tubular microfiltration membrane device. The clear water tank module is a steel structure.

[0036] All connecting pipes of each unit are made of plastic. Plastic pipes can prevent rust and provide a certain degree of insulation. The plastic pipes used are made of PVC-U and HDPE.

[0037] The aforementioned thermal insulation and heat insulation treatment is applied to each container body, air flotation equipment, ozone catalytic oxidation tower and pipeline network. Each container body, air flotation equipment and ozone catalytic oxidation tower is insulated using a combination of steel plates, rock wool and aviation aerogel. The pipeline network is insulated and heat-insulated using a combination of electric heat tracing, rubber and plastic sponge and aluminum sheet, as shown in Table 1 below.

[0038] Table 1 Thermal Insulation Treatment Methods

[0039]

[0040] Please see Figure 2 Furthermore, the workflow of this utility model is described in detail below:

[0041] First, raw water enters the raw water collection tank through the inlet pipeline for water quality and quantity adjustment and storage. The raw water is then pumped to a heat exchanger for preheating to cope with the low temperatures of cold regions. The preheated raw water enters a static mixer, where it reacts with added acids, alkalis, PAC, PAM, and other chemicals to adjust the pH and generate precipitates to remove pollutants. The water then flows through a self-cleaning filter to trap larger particles and prevent clogging of subsequent equipment. The blockage material is automatically discharged into a thickening tank. The filtered water then enters the ozone oxidation treatment unit. The ozone generated by the ozone generator reacts with pollutants in the oxidation tower, degrading organic matter and impurities. Residual ozone is converted into oxygen by a destruction device. Finally, the water flows into the air flotation unit, where coagulants are added. Coagulants and microbubbles cause oils and suspended solids to float and separate. The effluent from the air flotation enters the thickening tank unit, where further chemicals are added in the static mixer to form flocs, achieving solid-liquid separation. The sludge is dewatered into sludge cakes and transported off-site. The filtrate is returned to the raw water collection tank. The effluent from the thickening tank enters a tubular microfiltration membrane device for deep filtration, thoroughly removing residual suspended solids and microorganisms. The filtered clean water is stored in the clear water tank module, meeting discharge or reuse standards. At the same time, the tubular microfiltration membrane cleaning system regularly backwashes the membrane modules with heated cleaning agents to ensure efficient operation. The entire system's piping is made of plastic and supplemented with electric heating and insulation layers. The containers and equipment adopt a composite insulation structure to ensure stable operation in an environment of -60°C.

[0042] Through the above steps, the system integrates flocculation, self-cleaning filtration, ozone oxidation, air flotation, and tubular microfiltration processes. It adopts a modular container design and is equipped with electric heating and composite insulation structures to achieve efficient decontamination and antifreeze. At the same time, it uses air flotation + flocculation + tubular microfiltration processes to efficiently remove suspended solids. It operates automatically and is adapted to cold environments. The pipelines and equipment use composite insulation technology to ensure stable operation at low temperatures, thus solving the problems of low temperature, equipment freezing, and low efficiency of traditional processes in cold regions.

Claims

1. An integrated water treatment system suitable for use in high-cold regions at minus 60℃, characterized in that: The system includes a raw water collection tank, a heat exchanger, a static mixer, a self-cleaning filter, an ozone oxidation treatment unit, an air flotation unit, a thickening tank unit, a tubular microfiltration membrane device, a clear water tank module, and a pipeline network. The system is integrated into multiple containers, with the water treatment equipment and components arranged inside the containers. The air flotation device and ozone catalytic tower are located in the external space, and fluid transmission and control between the functional areas are achieved through the pipeline network. All units are connected through the pipeline network.

2. The integrated water treatment system suitable for the frigid region of minus 60℃ according to claim 1, characterized in that: The raw water collection tank is connected to the raw water inlet pipeline and is used to collect and store raw water and regulate the quality and quantity of incoming water. The heat exchanger is connected to the raw water collection tank, and wastewater is transported to the heat exchanger by a booster pump for heating.

3. The integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C according to claim 1, characterized in that: One set of the static mixers is connected to the outlet pipe of the raw water tank booster pump and the dosing pipe, and the other set is connected to the air flotation effluent. By adding chemicals, the pH value of the raw water is adjusted and reacts with pollutants in the water to form precipitates. The self-cleaning filter is connected to the downstream pipe of the static mixer to intercept larger particles in the water. When the self-cleaning filter becomes clogged due to long-term filtration, the self-cleaning filter will automatically discharge the blockage to the thickening tank.

4. The integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C according to claim 1, characterized in that: The ozone oxidation treatment unit consists of an ozone preparation system and an ozone oxidation tower. The ozone preparation system provides the ozone source, and the ozone oxidation tower is connected to the outlet pipeline of the self-cleaning filter. In the ozone oxidation tower, the raw water and ozone react, and the pollutants and impurities in the water are oxidized or degraded. The ozone that has not reacted enters the ozone destruction device and is converted into oxygen.

5. The integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C according to claim 1, characterized in that: The air flotation unit is connected to the effluent pipeline of the ozone oxidation tower. By adding coagulant and flocculation agents to the water, the generated microbubbles adsorb oily substances and suspended solids, causing them to float and separate.

6. The integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C according to claim 1, characterized in that: The thickening tank unit is connected to the air flotation effluent pipeline. The raw water treated by air flotation first enters the static mixer and then enters the thickening tank unit. The suspended solids in the water form flocs, and solid-liquid separation occurs in this unit to further remove suspended solids from the wastewater. The sludge thickener dewaters the sludge into sludge cakes for disposal. The filtrate enters the filtrate collection tank and is pumped to the raw water collection tank.

7. The integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C according to claim 1, characterized in that: The tubular microfiltration membrane device comprises a dosing system, a cleaning agent storage tank, and a heat exchanger. The dosing system delivers the cleaning agent to the cleaning agent storage tank. The cleaning solution is heated by the heat exchanger and then used to backwash the membrane module. The tubular microfiltration membrane device is connected to the effluent pipe of the concentration tank and is used to filter out most of the solid suspended matter in the water. The water produced by the tubular microfiltration membrane enters the clear water tank module.

8. An integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C, as described in claim 1, is characterized in that: The clear water tank module is used to store the effluent from the tubular microfiltration membrane device.

9. An integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C, as described in claim 1, is characterized in that: The pipeline network is made of plastic, and each unit connecting pipeline is equipped with electric heat tracing, rubber and plastic sponge and aluminum sheet insulation layer.

10. An integrated water treatment system suitable for extremely cold regions with temperatures as low as -60°C, as described in claim 1, characterized in that: The container body, air flotation equipment, and ozone catalytic oxidation tower are all insulated using a combination of steel plates, rock wool, and aviation aerogel. The pipeline network is insulated and heat-resistant using a combination of electric heat tracing, rubber and plastic sponge, and aluminum sheet.

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