Low-carbon recycling complete equipment of flexible membrane treatment system for high-salinity wastewater

Abstract

The invention relates to the technical field of high salinity water treatment, and particularly discloses high salinity wastewater flexible membrane treatment system low-carbon recycling complete equipment which comprises a homogenizing tank, an adjusting tank, a sand filtering device, a first water producing tank, a first AMBC high-power concentration device, a second water producing tank and a second AMBC high-power concentration device which are sequentially arranged in the flowing direction of wastewater. AMBC high-power concentration membranes are arranged in the first AMBC high-power concentration device and the second AMBC high-power concentration device, the first AMBC high-power concentration device is used for conducting primary concentration on sand filtration produced water, the second produced water tank is communicated with the first AMBC high-power concentration device, the second produced water tank is used for collecting primary permeate liquid filtered by the first AMBC high-power concentration device, and the primary permeate liquid is communicated with the second AMBC high-power concentration device. The second AMBC high-power concentration device is communicated with the second water producing tank and is used for performing second-stage concentration on the first-stage permeate liquid. According to the invention, high-power concentration can be realized, the concentration ratio is improved, the process route of a wastewater treatment device is shortened, and the flow is simplified.

Description

Technical Field

[0001] This application relates to the technical field of high-salt water treatment, and particularly to a complete set of low-carbon resource utilization devices for a flexible membrane treatment system for high-salt wastewater. Background Art

[0002] An evaporation pond is a natural or artificially constructed facility for treating high-salt wastewater. By means of natural evaporation, the water in the wastewater is reduced, so that salts and other impurities are concentrated and precipitated. With the increasingly tense global water resources, the application of evaporation ponds in high-salt wastewater treatment is becoming more and more extensive. However, evaporation ponds have problems such as complex water quality, possible water quality fluctuations, and the growth of bacteria after being placed for too long. Traditional evaporation pond treatment technologies have some limitations, such as large floor area, low treatment efficiency, and great environmental impact.

[0003] To solve these problems, an atomization evaporation process is used to treat the wastewater in the evaporation pond. The atomization evaporation process is an efficient and environmentally friendly wastewater treatment method that converts the wastewater into tiny droplets. These droplets quickly evaporate in the natural environment, and the water is taken away in the form of water vapor, while salts and other impurities are left in the residue, so as to achieve the purposes of wastewater reduction, salt concentration, and impurity precipitation. In the process of treating high-salt wastewater in the evaporation pond, the wastewater first enters the pretreatment stage, and suspended solids and impurities in the wastewater are removed by methods such as precipitation and filtration. Then, the wastewater sprayed into tiny droplets by the atomizer enters the evaporation pond and gradually concentrates during the natural evaporation process. When concentrated to a certain extent, the salts in the wastewater begin to crystallize and precipitate, forming solid waste. However, for the treatment of high-salt complex water quality, the existing atomization evaporation process is prone to the crystallization and precipitation of salts in the water and flying into the external environment, causing ground pollution. Summary of the Invention

[0004] To solve the problems of difficult treatment of existing high-salt complex water quality, long treatment process flow, and poor operation stability, this application provides a complete set of low-carbon resource utilization devices for a flexible membrane treatment system for high-salt wastewater.

[0005] A complete set of low-carbon resource utilization devices for a flexible membrane treatment system for high-salt wastewater provided by this application adopts the following technical solutions: A complete set of low-carbon resource utilization devices for a flexible membrane treatment system for high-salt wastewater provided by this application includes the following treatment steps: S10: pH adjustment, adding an acid solution to the adjustment tank to reduce the pH value of the wastewater; S20: Preliminary treatment, using a sand filtration device to treat the wastewater after adjusting the pH value to form sand filtration product water and achieve preliminary filtration; S30: Primary concentration, using an AMBC high-fold concentration device to perform primary concentration on the sand filtration product water to form a primary permeate and a primary concentrate; S40: Secondary concentration. The primary permeate after primary concentration is subjected to secondary concentration using the AMBC high-fold concentration device two to form a secondary permeate and a secondary concentrated solution. S50: Treated water reuse. The secondary permeate is discharged or reused after meeting the standards.

[0006] By adopting the above technical solution, the AMBC high-fold concentration device one and the AMBC high-fold concentration device two are used to treat the wastewater. The AMBC high-fold concentration device one and the AMBC high-fold concentration device two utilize the selective permeation characteristics of the semi-permeable membrane. Under the drive of pressure, water molecules pass through the membrane, while solutes such as salts are intercepted. Compared with the traditional reverse osmosis technology, it not only significantly improves the concentration ratio, but also can shorten the process route of the wastewater treatment device, simplify the process, improve the wastewater treatment efficiency and effectively ensure the wastewater treatment effect.

[0007] In some embodiments, scale inhibitors are added to the wastewater in steps S10, S20, and S30 respectively.

[0008] By adopting the above technical solution, the molecules in the scale inhibitor can form stable chelates with the cations in the wastewater. The chelates can prevent the combination of cations and anions to form scale, thereby reducing the probability of scale formation. By adding scale inhibitors at multiple positions, the problem of the scale inhibitor not being added in place can be avoided as much as possible to ensure that the scale inhibitor is added in place and further prevent the formation of scale.

[0009] In some embodiments, an alkali solution is added to the primary permeate passing through the AMBC high-fold concentration device one after step S30, and an alkali solution is added to the secondary permeate passing through the AMBC high-fold concentration device two after step S40.

[0010] By adopting the above technical solution, through the secondary treatment of the primary concentrated solution and the secondary concentrated solution, a better filtration effect can be achieved, and the maximum efficiency of wastewater recycling can be realized, improving the purified water output and the wastewater treatment efficiency.

[0011] On the other hand, the present application provides a set of low-carbon resource treatment equipment for high-salt wastewater with flexible membrane, including a homogenizing tank, a regulating tank, a sand filter device, a first water production tank, an AMBC high-multiple concentration device 1, a second water production tank and an AMBC high-multiple concentration device 2 arranged in sequence along the flow direction of the wastewater, the homogenizing tank is used to store wastewater, the inlet of the regulating tank is connected to the outlet of the homogenizing tank, and the regulating tank is used to adjust the pH value of the wastewater; the inlet of the sand filter device is connected to the outlet of the regulating tank, and the sand filter device is used to filter mud and sand in the wastewater; the inlet of the first water production tank is connected to the outlet of the sand filter device, and the first water production tank is used to collect sand filtration water filtered by the sand filter device; the inlet of the AMBC high-multiple concentration device 1 is connected to the outlet of the first water production tank, and the AMBC high-multiple concentration device 1 and the AMBC high-multiple concentration device 2 are connected. C high-fold concentrator 2 is equipped with AMBC high-fold concentrator membrane. AMBC high-fold concentrator 1 is used for primary concentration of sand filtration water. After the sand filtration water enters the AMBC high-fold concentrator 1, primary permeate and primary concentrate are formed. The second water production tank is connected with the AMBC high-fold concentrator 1. The second water production tank is used to collect the primary permeate. AMBC high-fold concentrator 2 is connected with the second water production tank. AMBC high-fold concentrator 2 performs secondary concentration on the primary permeate to form secondary permeate and secondary concentrate. AMBC high-fold concentrator 1 is connected with the homogenizing tank. The primary concentrate flows back to the homogenizing tank for secondary treatment. AMBC high-fold concentrator 2 is connected with the first water production tank. The secondary concentrate flows back to the first water production tank for secondary treatment.

[0012] By adopting the above technical scheme, by setting up a homogenizing tank, a regulating tank, a sand filter device, a first water production tank, an AMBC high-fold concentration device 1, a second water production tank and an AMBC high-fold concentration device 2, the wastewater can be adjusted step by step, and the AMBC high-fold concentration membranes in the AMBC high-fold concentration device 1 and the AMBC high-fold concentration device 2 can achieve high-fold concentration, thereby shortening the wastewater treatment process and improving the work efficiency of wastewater treatment.

[0013] In some embodiments, multiple automatic dosing devices are also included. A first automatic dosing device is provided at the regulating tank for adding scale inhibitors to the regulating tank. A second automatic dosing device is provided at the first water production tank for adding scale inhibitors to the first water production tank. A third automatic dosing device is provided at an AMBC high-fold concentration device for adding scale inhibitors to an AMBC high-fold concentration device.

[0014] By adopting the above technical solution and setting up multiple automatic dosing devices, when one of the dosing mechanisms fails to dosing, other automatic dosing devices can ensure the normal dosing of the agent, thereby avoiding the formation of scale as much as possible. At the same time, multiple automatic dosing machines can ensure the dosage of the agent, thereby achieving a better anti-scaling effect.

[0015] In some embodiments, the automatic chemical dosing device includes a mixing tank, a monitoring module, and a control module. The mixing tank is used to mix water and liquid medicine. The monitoring module is communicatively connected to the control module. The monitoring module is used to monitor the raw water quality, the system operation status, and the scale inhibitor dosage. The control module is used to receive the information fed back by the monitoring module and dynamically adjust the scale inhibitor dosage.

[0016] In some embodiments, it further includes a centrifugal pump, which is used to circulate the wastewater among the equalization tank, the regulating tank, the sand filtration device, the first product water tank, the AMBC high-concentration device I, the second product water tank, and the AMBC high-concentration device II; The centrifugal pump includes a housing, a motor, and an impeller. A pump chamber is provided inside the housing. An inlet and an outlet are provided on the housing. The inlet and the outlet are respectively communicated with the pump chamber. The impeller is arranged in the pump chamber. The motor is drivingly connected to the impeller to drive the impeller to rotate; A slide rail is provided at the bottom of the housing. The housing includes a first module, a second module, and a third module. The first module, the third module, and the motor are respectively independently slidably mounted on the slide rail.

[0017] In some embodiments, the first module is detachably connected to the second module, the third module is detachably connected to the second module, the motor is detachably connected to the third module. A linkage rod is provided between the first module, the second module, the third module, and the motor. The linkage rod is connected to the third module and the motor, and is used to drive the third module and the motor to approach or move away from each other.

[0018] In some embodiments, the first module and the second module are flange-connected, the second module and the third module are flange-connected. The linkage rod penetrates through the edges of the first module, the second module, the third module, and the motor. The linkage rod is threadedly connected to the third module and the motor.

[0019] In some embodiments, a cooling pipeline and a temperature sensor are provided inside the motor. The cooling pipeline is spirally wound around the inside of the motor housing. The cooling pipeline is used for the coolant to enter and circulate. The temperature sensor is used to detect the temperature of the motor. When the motor temperature rises, the circulation of the coolant in the motor is automatically started.

[0020] By adopting the above technical solutions, through the improvement of the structure of the centrifugal pump, the energy consumption during the use of the centrifugal pump is reduced, the working efficiency of the centrifugal pump is improved, and the circulation efficiency of the wastewater among the equalization tank, the regulating tank, the sand filtration device, the first product water tank, the AMBC high-concentration device I, the second product water tank, and the AMBC high-concentration device II is further improved. Furthermore, the working efficiency of the entire high-salt wastewater flexible membrane treatment low-carbon resource conversion complete device is improved, which helps to reduce the overall energy consumption and achieve low-carbon resource conversion.

[0021] Compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0022] 1. AMBC high-concentration device I and AMBC high-concentration device II utilize the selective permeation characteristics of the semi-permeable membrane. By changing the osmotic pressure of the solutions on both sides of the membrane, the osmotic pressure bottleneck of traditional reverse osmosis at high salt concentrations is overcome, allowing for the treatment of higher-concentration brine. Compared with traditional reverse osmosis, not only is the concentration ratio significantly increased, but also the process route of the wastewater treatment device can be shortened, the process simplified, the wastewater treatment efficiency improved, and the wastewater treatment effect effectively guaranteed.

[0023] 2. Compared with the wastewater treatment system, the wastewater treatment system provided by the present application has a higher concentration ratio, and the TDS of the concentrated water can reach 2 to 3 times that of the traditional technology; the system can concentrate the influent to near or exceed the saturation concentration, such as the TDS of the concentrated brine can reach more than 140,000 mg / L.

[0024] 3. The comprehensive energy consumption is reduced by 20% - 30%, the equipment investment cost is reduced by 30%, the floor area is reduced by 40% compared with traditional RO, there is no steam emission, and the chemical cleaning waste liquid is reduced by 70%. Description of the Drawings

[0025] Figure 1 is a flow chart of the complete set of devices for the low-carbon resource conversion of the high-salt wastewater flexible membrane treatment system in the embodiment of the present application.

[0026] Figure 2 is a schematic diagram of the overall structure of the complete set of devices for the low-carbon resource conversion of the high-salt wastewater flexible membrane treatment system in the embodiment of the present application.

[0027] Figure 3 is a schematic diagram of the structure of the centrifugal pump in the embodiment of the present application.

[0028] Figure 4 is an exploded view of the centrifugal pump in the embodiment of the present application.

[0029] Figure 5 is a side view of the centrifugal pump in the embodiment of the present application.

[0030] In the figure: 1, homogeneous tank; 2, regulating tank; 21, pH regulating device 1; 22, pH regulating device 2; 3, sand filtration device; 4, first water production tank; 5, AMBC high-concentration device 1; 6, second water production tank; 7, AMBC high-concentration device 2; 81, first automatic chemical dosing device; 82, second automatic chemical dosing device; 83, third automatic chemical dosing device; 9, centrifugal pump; 90, housing; 901, first module; 902, second module; 903, third module; 91, water inlet; 92, water outlet; 93, connecting shaft; 94, slide rail; 95, first slider; 96, second slider; 97, third slider; 98, linkage rod; 981, first thread; 982, second thread; 99, pump chamber; 100, motor; 101, impeller. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application.

[0032] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the associated relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after without special explanation.

[0033] The embodiments of the present application disclose a complete set of devices for low-carbon resource conversion of a high-salt wastewater flexible membrane treatment system. Refer to Figure 1 and Figure 2 , the complete set of devices for low-carbon resource conversion of the high-salt wastewater flexible membrane treatment system includes the following treatment steps: S10: pH adjustment, adding an acid solution to the regulating tank 2 to reduce the pH value of the wastewater; S20: Preliminary treatment, using the sand filtration device 3 to treat the wastewater after pH adjustment to form sand filtration produced water and achieve preliminary filtration; S30: Primary concentration, using the AMBC high-concentration device 1 5 to perform primary concentration on the sand filtration produced water to form a primary permeate and a primary concentrate; S40: Secondary concentration, using the AMBC high-concentration device 2 7 to perform secondary concentration on the primary permeate after primary concentration to form a secondary permeate and a secondary concentrate; S50: Produced water reuse, the secondary permeate is discharged or reused after reaching the standard.

[0034] Specifically, in step S10, the pH value of the wastewater is reduced to about 4 by adding an acid solution to prevent the formation of calcium carbonate in the wastewater and reduce the structures in the wastewater.

[0035] In step S20, the wastewater forms filtered water in the sand filtration system through natural sedimentation, and the operation of step S30 is performed on the filtered water. In steps S30 and S40, the AMBC high-concentration device I 5 and the AMBC high-concentration device II 7 utilize the selective permeation characteristics of the semi-permeable membrane. Under pressure drive, water molecules pass through the membrane while solutes such as salts are intercepted. Compared with the traditional reverse osmosis technology, the AMBC high-concentration device I 5 and the AMBC high-concentration device II 7 not only significantly improve the concentration ratio through fluid path optimization, but also can shorten the process route of the wastewater treatment device, simplify the process, improve the wastewater treatment efficiency and effectively ensure the wastewater treatment effect.

[0036] Specifically, in steps S10, S20, and S30, a scale inhibitor is added to the wastewater. In this embodiment, the scale inhibitor is specifically the five-fold concentrated HSI-50C scale inhibitor, purchased from Hangzhou Ruiyi New Materials Co., Ltd. The molecules in the scale inhibitor can form stable chelates with the cations in the wastewater, and the chelates can prevent the combination of cations and anions to form scale, thereby reducing the scale formation rate. By adding the scale inhibitor at multiple positions, the problem that the scale inhibitor is not added in place at one position can be avoided as much as possible, ensuring that the scale inhibitor can be added in place and further preventing the formation of scale, providing convenience for the reuse treatment of wastewater.

[0037] After step S30, an alkali solution is added to the first-stage permeate filtered by the AMBC high-concentration device I 5. After step S40, an alkali solution is added to the second-stage permeate filtered by the AMBC high-concentration device II 7. By adding the alkali solution, the pH value of the first-stage permeate and the second-stage permeate can be increased, so that the pH value of the finally treated wastewater reaches the discharge standard.

[0038] Furthermore, in step S30, the first-stage concentrated liquid is repeatedly processed in steps S10 - S50 for secondary treatment; in step S40, the second-stage concentrated liquid is repeatedly processed in steps S30 and S40 for secondary treatment. By performing secondary treatment on the first-stage concentrated liquid and the second-stage concentrated liquid, a better filtration effect can be achieved, and the maximum efficiency of wastewater recycling can be realized, improving the purified water output and the wastewater treatment efficiency.

[0039] The traditional evaporation pond wastewater process mainly includes pretreating the waste liquid, performing operations such as sedimentation, filtration, and pH adjustment on the waste liquid, and then transporting the pretreated waste liquid to an evaporator for heating to evaporate and sublimate the water in the waste liquid, and the solid substances in the waste liquid gradually concentrate and precipitate to form a concentrated liquid. The flexible membrane treatment system for high-salt wastewater provided by this application optimizes the membrane module and process design, adopts the AMBC high-fold concentration device 5 and the AMBC high-fold concentration device 7, utilizes the selective permeation characteristics of the semi-permeable membrane, overcomes the osmotic pressure bottleneck of traditional reverse osmosis at high salt concentrations by changing the osmotic pressure of the solutions on both sides of the membrane, and allows the treatment of higher-concentration brine, with the sodium chloride concentration exceeding 21%. Compared with traditional reverse osmosis, the flexible membrane treatment system for high-salt wastewater provided by this application has a higher concentration ratio, and the TDS of the concentrated water can reach 2 to 3 times that of the traditional technology; the system can concentrate the influent to near or exceed the saturation concentration, such as the TDS of the concentrated brine can reach more than 140,000 mg / L.

[0040] Referring to Figure 1 and Figure 2 , a low-carbon resource utilization complete set of devices for a flexible membrane treatment system for high-salt wastewater provided by this application further includes a homogenization tank 1, a regulation tank 2, a sand filtration device 3, a first product water tank 4, an AMBC high-fold concentration device 5, a second product water tank 6, and an AMBC high-fold concentration device 7 arranged in sequence along the wastewater flow direction. The homogenization tank 1 is used to store evaporation pond wastewater. The inlet of the regulation tank 2 is connected to the outlet of the homogenization tank 1, and the wastewater enters the regulation tank 2, and acid is added to the regulation tank 2 to adjust the pH value of the wastewater; the inlet of the sand filtration device 3 is connected to the outlet of the regulation tank 2, and the wastewater after pH adjustment enters the sand filtration device 3, and natural sedimentation is carried out in the sand filtration device 3 to filter the sediment in the wastewater, and the wastewater forms sand-filtered product water after filtration; the inlet of the first product water tank 4 is connected to the outlet of the sand filtration device 3, and the sand-filtered product water enters the first product water tank 4. The inlet of the AMBC high-fold concentration device 5 is connected to the outlet of the first product water tank 4, and an AMBC high-fold concentration membrane is arranged in the AMBC high-fold concentration device 5. The AMBC high-fold concentration device 5 is used for primary concentration of the sand-filtered product water to divide the sand-filtered product water into a primary permeate and a primary concentrated liquid; the inlet of the second product water tank 6 is connected to the outlet of the AMBC high-fold concentration device 5, and the second product water tank 6 is used to collect the primary permeate filtered by the AMBC high-fold concentration device 5. The inlet of the AMBC high-fold concentration device 7 is connected to the outlet of the second product water tank 6, and the AMBC high-fold concentration device 7 is used for secondary concentration of the primary permeate to divide the primary permeate into a secondary permeate and a secondary concentrated liquid. The secondary permeate is discharged or reused after reaching the standard.

[0041] The complete set of devices for flexible membrane treatment of high-salt wastewater and low-carbon resource conversion provided by this application adopts the above treatment process, with the comprehensive energy consumption reduced by 40% - 50% and the equipment investment cost reduced by 30%. Moreover, the AMBC high-concentration device I and the AMBC high-concentration device II provided by this application have a 40% reduction in floor area compared to traditional RO, no steam emissions, and a 70% reduction in chemical cleaning waste liquid.

[0042] In some embodiments, a bag filter is provided between the AMBC high-concentration device I 5 and the first product water tank 4. The bag filter is a prior art and will not be elaborated here. Through the bag filter, impurities in the liquid can be effectively removed, improving the purity of the liquid.

[0043] By providing the homogenization tank 1, the regulation tank 2, the sand filtration device 3, the first product water tank 4, the AMBC high-concentration device I 5, the second product water tank 6, and the AMBC high-concentration device II 7, the wastewater can be adjusted step by step. The AMBC high-concentration membranes in the AMBC high-concentration device I 5 and the AMBC high-concentration device II 7 can achieve high-concentration. The AMBC high-concentration membranes are purchased from Hangzhou Shangtuo Environmental Technology Co., Ltd. Utilizing the selective permeation characteristics of the semi-permeable membrane, under pressure drive, water molecules can pass through the membrane while solutes such as salts are intercepted. Compared with traditional reverse osmosis technology, through fluid path optimization, it not only significantly improves the concentration ratio but also can shorten the process route of the wastewater treatment device, simplify the process, improve the wastewater treatment efficiency, and effectively ensure the wastewater treatment effect. Further, sand filtration packing is provided in the sand filtration device 3, and the sand filtration packing is preferably quartz sand in this embodiment.

[0044] Furthermore, the flexible membrane treatment and low-carbon resource utilization complete device for high-salt wastewater further includes a plurality of automatic dosing devices. The automatic dosing devices include a first automatic dosing device 81, a second automatic dosing device 82, and a third automatic dosing device 83. The first automatic dosing device 81 is arranged at the regulating tank 2, and the first automatic dosing device 81 is used to add scale inhibitor to the regulating tank 2; the second automatic dosing device 82 is arranged at the first product water tank 4, and the second automatic dosing device 82 is used to add scale inhibitor to the first product water tank 4; the third automatic dosing device 83 is arranged at the AMBC high-concentration device I 5, and the third automatic dosing device 83 is used to add scale inhibitor to the AMBC high-concentration device I 5. Specifically, the automatic dosing device includes a stirring tank, a monitoring module, and a control module. The liquid medicine and water are stirred and mixed in the stirring tank. One end of the stirring tank is provided with a liquid medicine inlet, and the other end is provided with a liquid medicine outlet. A control valve is arranged at the liquid medicine outlet, and the control valve is used to control the opening and closing of the liquid medicine outlet. The monitoring module is communicatively connected with the control module. The monitoring module is used to monitor the raw water quality, the system operation status, and the scale inhibitor dosing amount. The control module is used to receive the information fed back by the monitoring module and realize the dynamic adjustment of the scale inhibitor dosing amount. The control module receives the dosing amount information of the scale inhibitor fed back by the monitoring module, compares it with the given dosing amount data, calculates the deviation rate, and adjusts the dosing amount of the scale inhibitor according to the deviation rate.

[0045] If the monitoring module monitors that the scale inhibitor dosing amount is lower than 1.0 mg / L for 1 minute continuously, it is determined that there is a scale inhibitor dosing failure. When one of the automatic dosing devices fails, the stable dosing of the scale inhibitor can be ensured through other automatic dosing devices. At the same time, multiple automatic dosing machines can ensure the dosing amount of the medicine, so as to achieve a better scale prevention effect, and further ensure the treatment effect of the wastewater.

[0046] Furthermore, in this embodiment, the AMBC high-concentration device I 5 is connected to the homogenization tank 1. The AMBC high-concentration device I 5 transports the primary concentrated liquid to the homogenization tank 1 for secondary treatment. The AMBC high-concentration device II 7 is connected to the first product water tank 4. The AMBC high-concentration device II 7 transports the secondary concentrated liquid to the first product water tank 4 for secondary treatment. By connecting the AMBC high-concentration device I 5 with the homogenization tank 1 and the AMBC high-concentration device II 7 with the first product water tank 4, the primary concentrated liquid and the secondary concentrated liquid can be subjected to secondary treatment, which helps to improve the utilization rate of the wastewater and increase the yield of the recycled water.

[0047] Samples of the raw water in the homogenization tank and the concentrated liquid treated by this application are taken and detected respectively. The detection results are shown in Table 1.

[0048]

[0049] Table 1

[0050] At an ambient temperature of 25 °C, the saturated ionic product of calcium sulfate is 2.4×10 -5 mol 2 / L 2 , and the ionic product of calcium sulfate in the concentrated solution in Table 1 is greater than 2.4×10 -5 mol 2 / L 2 , that is, calcium sulfate has precipitation crystallization. When the complete set of devices for flexible membrane treatment of high-salt wastewater to convert low-carbon resources into carbon is treating water quality with easy saturation crystallization of calcium sulfate, the system operates stably and has a good recovery rate. Compared with the existing wastewater treatment processes and devices, the recovery rate of the complete set of devices for flexible membrane treatment of high-salt wastewater to convert low-carbon resources into carbon provided by this application has been greatly improved.

[0051] Furthermore, the complete set of devices for flexible membrane treatment of high-salt wastewater to convert low-carbon resources into carbon provided by this application further includes a pH adjustment device. The pH adjustment device includes a pH adjustment device 1 (21) and a pH adjustment device 2 (22). The pH adjustment device 1 (21) is used to add an acid solution to the adjustment tank to lower the pH value of the wastewater in the adjustment tank, and the pH adjustment device 2 (22) is used to add an alkali solution to the first-stage permeate and the second-stage permeate to increase the pH value of the second-stage permeate. The structures of the pH adjustment device 1 (21) and the pH adjustment device 2 (22) are the same. Taking the pH adjustment device 1 (21) as an example, the pH adjustment device 1 (21) includes a pH meter sensor and a pH chemical feeder. The pH meter sensor is communicatively connected to the pH chemical feeder. The pH meter sensor is used to detect the pH value of the wastewater and transmit the pH value of the wastewater to the control module. The control module controls the dosing amount of the pH chemical feeder based on the AI algorithm to control the addition amount of the acid solution. Using the pH meter sensor to achieve automatic adjustment can monitor the pH value in real time, avoiding the time delay and error of manual detection. Automatic adjustment can achieve the control of acidity and alkalinity with higher precision and stability. In addition, a PTFE or silicon carbide coating is sprayed on the inner wall of the chemical dosing pipeline for acid and alkali solutions to improve the corrosion resistance of the pipeline, and a ceramic material is used to make the acid and alkali-resistant metering pump head, which can be quickly disassembled and replaced to avoid the problem of corrosion failure of metal components, thereby extending the service life and reducing the maintenance cost.

[0052] In some embodiments, a centrifugal pump is provided between the homogenization tank 1, the regulating tank 2, the sand filtration device 3, the first water production tank 4, the first AMBC high-concentration device 5, the second water production tank 6, and the second AMBC high-concentration device 7. The centrifugal pump 9 includes a housing 90, a motor 100, and an impeller 101. A pump chamber 99 is formed in the housing 90. An inlet 91 and an outlet 92 are provided on the housing 90, and the inlet 91 and the outlet 92 are respectively communicated with the pump chamber 99. The impeller 101 is arranged in the pump chamber 99, and the motor 100 is in driving connection with the impeller 101 to drive the impeller 101 to rotate. Specifically, a connecting shaft 93 is provided on the impeller 101. The connecting shaft 93 is connected to the output shaft of the motor 100 through a coupling, and the impeller 101 is connected to the connecting shaft 93 through a key and bolts.

[0053] Referring to Figures 3 to 5 , a slide rail 94 is provided at the bottom of the housing 90. A first slider 95, a second slider 96, and a third slider 97 are slidably mounted on the slide rail 94, and each slider is independent of each other. The housing 90 includes a first module 901, a second module 902, and a third module 903. The first module 901 is slidably mounted on the first slider 95; the third module 903 is slidably mounted on the second module 902, and the motor 100 is slidably mounted on the third module 903. Moreover, the first module 901, the third module 903, and the motor 100 are all detachably connected to the slider. The first module 901 is detachably connected to the second module 902, the third module 903 is detachably connected to the second module 902, and the motor 100 is detachably connected to the third module 903. A linkage rod 98 is provided between the first module 901, the second module 902, the third module 903, and the motor 100. The linkage rod 98 penetrates through the edges of the first module 901, the second module 902, the third module 903, and the motor 100. The linkage rod 98 is slidably engaged with the first module 901 and the second module 902. First threads 981 and second threads 982 are provided on the linkage rod 98. The linkage rod 98 is threadedly connected to the third module 903 through the first threads 981 and is threadedly connected to the motor 100 through the second threads 982, and the pitch of the second threads 982 is greater than the pitch of the first threads 981.

[0054] When the centrifugal pump 9 needs to be disassembled, the connections between the motor 100 and the impeller 101, and between the third module 903 and the second module 902 are released. Then the linkage rod 98 is rotated. Under the guiding action of the slide rail 94, the linkage rod 98 drives the second module 902 and the third module 903 to separate. Then the connection between the first module 901 and the second module 902 is released, and the first module 901 is driven along the slide rail 94 to move away from the second module 902 to achieve the separation between the first module 901 and the second module 902. Then the impeller 101 is removed from the connecting shaft 93 to achieve the disassembly of the impeller 101.

[0055] Due to fouling, corrosion or blockage, the efficiency of the centrifugal pump 9 will decrease by 10% - 30%, increasing energy consumption. By setting up the first module 901, the second module 902, and the third module 903, it is convenient to disassemble, replace and clean the casing 90 of the centrifugal pump 9. By regularly cleaning the impeller 101 and the casing 90, the smoothness of the flow channel is restored, the efficiency of the centrifugal pump 9 is improved, and energy consumption is reduced. At the same time, the impeller 101 adopts a three-dimensional flow impeller 101, which can increase the efficiency of the centrifugal pump 9 by 5% - 15%. Further, the speed of the motor 100 can be adjusted by a frequency converter to match the flow rate and head of the centrifugal pump 9 with the actual demand, avoiding throttling losses. For example: when the flow rate demand decreases by 20%, the speed decreases by 20%, and the power can be reduced by about 49% (following the similarity law P∝n3, where P is power and n is speed).

[0056] Furthermore, if the motor 100 of the centrifugal pump 9 overheats due to insufficient heat dissipation during operation, it will not only reduce efficiency and increase energy consumption, but may also shorten the equipment life and even cause failures. Therefore, in this application, a cooling pipe is set inside the casing of the motor 100, and condensate is introduced into the cooling pipe for heat exchange. The cooling pipe is spirally wound inside the casing of the motor 100 to extend the flow path of the coolant, enhance the heat exchange time of the coolant inside the casing of the motor 100, and achieve rapid cooling. A temperature sensor is set inside the motor 100. When the temperature of the motor 100 rises, the circulation of the coolant inside the motor 100 is automatically started to dynamically adjust the heat dissipation intensity, reduce unnecessary heat dissipation energy consumption, and the comprehensive energy saving reaches 15% - 20%.

[0057] In summary, by improving the structure of the centrifugal pump 9, the energy consumption during the use of the centrifugal pump 9 is reduced, the working efficiency of the centrifugal pump 9 is increased, and the flow efficiency between the wastewater in the equalization tank 1, the regulation tank 2, the sand filtration device 3, the first product water tank 4, the AMBC high-concentration device 1 5, the second product water tank 6 and the AMBC high-concentration device 2 7 is further improved. Furthermore, the working efficiency of the entire high-salt wastewater flexible membrane treatment low-carbon resource conversion complete device is improved, and the overall energy consumption is reduced by more than 20%.

[0058] The implementation principle of the embodiments of this application is as follows: Wastewater enters the regulation tank 2 from the homogenization tank 1. In the regulation tank 2, the pH value is reduced by adding acid to reduce the formation of calcium carbonate. Then the wastewater enters the sand filtration device 3. In the sand filtration device 3, the wastewater forms sand filtration product water through natural sedimentation. After the sand filtration product water enters the first product water tank 4, it is filtered by a bag filter and then enters the AMBC high-concentration device 5. After being filtered by the AMBC high-concentration device 5, the sand filtration product water is divided into a primary permeate and a primary concentrate. The primary permeate first enters the second product water tank 6 and then enters the AMBC high-concentration device 7 for secondary concentration. At the same time, the primary concentrate enters the homogenization tank 1 for secondary filtration. The primary permeate is divided into a secondary permeate and a secondary concentrate in the AMBC high-concentration device 7. The pH value of the secondary permeate is adjusted by adding alkali. After meeting the standards, it is discharged or reused. The secondary concentrate enters the first product water tank 4 for secondary filtration to increase the purified water output.

[0059] The above are all the preferred embodiments of this application. The protection scope of this application is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A complete set of devices for low-carbon resource conversion of a flexible membrane treatment system for high-salt wastewater, characterized in that, The complete set of devices for low-carbon resource conversion of the high-salt wastewater flexible membrane treatment system includes the following treatment steps: S10: pH adjustment, adding an acid solution into the adjustment tank (2) to reduce the pH value of the wastewater; S20: Preliminary treatment, using a sand filtration device (3) to treat the wastewater with adjusted pH value to form sand filtration product water, achieving preliminary concentration; S30: Primary concentration, using the AMBC high-fold concentration device I (5) to conduct primary concentration on the sand filtration product water to form a primary permeate and a primary concentrate; S40: Secondary concentration, subjecting the primary permeate after primary concentration to secondary concentration using the AMBC high-fold concentration device II (7) to form a secondary permeate and a secondary concentrate; S50: Product water reuse, discharging or reusing the secondary permeate after it meets the standards.

2. The complete set of devices for low-carbon resource conversion of a flexible membrane treatment system for high-salt wastewater according to claim 1, characterized in that: In the steps S10, S20, and S30, a scale inhibitor is added to the wastewater respectively.

3. A complete set of devices for low-carbon resource conversion of a flexible membrane treatment system for high-salt wastewater according to claim 1, characterized in that: After the step S30, an alkali solution is added to the primary permeate passing through the AMBC high-fold concentration device I (5). After the step S40, an alkali solution is added to the secondary permeate passing through the AMBC high-fold concentration device II (7).

4. A complete set of devices for low-carbon resource conversion of a flexible membrane treatment system for high-salt wastewater according to claim 1, characterized in that: It includes a homogenization tank (1), an adjustment tank (2), a sand filtration device (3), a first product water tank (4), an AMBC high-fold concentration device I (5), a second product water tank (6), and an AMBC high-fold concentration device II (7) arranged in sequence along the wastewater flow direction. The homogenization tank (1) is used for storing wastewater. The inlet of the adjustment tank (2) is connected to the outlet of the homogenization tank (1), and the adjustment tank (2) is used for adjusting the pH value of the wastewater; the inlet of the sand filtration device (3) is connected to the outlet of the adjustment tank (2), and the sand filtration device (3) is used for filtering the sediment in the wastewater; the inlet of the first product water tank (4) is connected to the outlet of the sand filtration device (3), and the first product water tank (4) is used for collecting the sand filtration product water filtered by the sand filtration device (3); the inlet of the AMBC high-fold concentration device I (5) is connected to the outlet of the first product water tank (4). AMBC high-fold concentration membranes are provided in both the AMBC high-fold concentration device I (5) and the AMBC high-fold concentration device II (7). The AMBC high-fold concentration device I (5) is used for conducting primary concentration on the sand filtration product water. After the sand filtration product water enters the AMBC high-fold concentration device I (5), a primary permeate and a primary concentrate are formed. The second product water tank (6) is connected to the AMBC high-fold concentration device I (5), and the second product water tank (6) is used for collecting the primary permeate. The AMBC high-fold concentration device II (7) is connected to the second product water tank (6). After the AMBC high-fold concentration device II (7) conducts secondary concentration on the primary permeate, a secondary permeate and a secondary concentrate are formed. The AMBC high-fold concentration device I (5) is connected to the homogenization tank (1), and the primary concentrate flows back to the homogenization tank (1) for secondary treatment. The AMBC high-fold concentration device II (7) is connected to the first product water tank (4), and the secondary concentrate flows back to the first product water tank (4) for secondary treatment.

5. A complete set of devices for low-carbon resource conversion of a flexible membrane treatment system for high-salt wastewater according to claim 4, characterized in that: It also includes a plurality of automatic chemical dosing devices. A first automatic chemical dosing device (81) is provided at the regulating tank (2) for adding scale inhibitor to the regulating tank (2). A second automatic chemical dosing device (82) is provided at the first product water tank (4) for adding scale inhibitor to the first product water tank (4). A third automatic chemical dosing device (83) is provided at the first AMBC high-concentration device (5) for adding scale inhibitor to the first AMBC high-concentration device (5).

6. The complete set of devices for low-carbon resource conversion of a flexible membrane treatment system for high-salt wastewater according to claim 5, characterized in that: The automatic chemical dosing device includes a mixing tank, a monitoring module, and a control module. The mixing tank is used to mix water and chemical liquid. The monitoring module is communicatively connected to the control module. The monitoring module is used to monitor the raw water quality, the system operation status, and the scale inhibitor dosing amount. The control module is used to receive the information fed back by the monitoring module and dynamically adjust the scale inhibitor dosing amount.

7. A complete set of devices for low-carbon resource utilization of a flexible membrane treatment system for high-salt wastewater according to claim 4, characterized in that: It also includes a centrifugal pump, which is used to circulate the wastewater among the homogenization tank (1), the regulating tank (2), the sand filtration device (3), the first product water tank (4), the first AMBC high-concentration device (5), the second product water tank (6), and the second AMBC high-concentration device (7). The centrifugal pump (9) includes a housing (90), a motor (100), and an impeller (101). A pump chamber (99) is formed inside the housing (90). An inlet (91) and an outlet (92) are provided on the housing (90). The inlet (91) and the outlet (92) are respectively communicated with the pump chamber (99). The impeller (101) is arranged inside the pump chamber (99). The motor (100) is drivingly connected to the impeller (101) to drive the impeller (101) to rotate. A slide rail (94) is provided at the bottom of the housing (90). The housing (90) includes a first module (901), a second module (902), and a third module (903). The first module (901), the third module (903), and the motor (100) are respectively and independently slidably mounted on the slide rail (94).

8. A complete set of devices for low-carbon resource conversion of a flexible membrane treatment system for high-salt wastewater according to claim 7, characterized in that: The first module (901) is detachably connected to the second module (902). The third module (903) is detachably connected to the second module (902). The motor (100) is detachably connected to the third module (903). A linkage rod (98) is provided between the first module (901), the second module (902), the third module (903), and the motor (100). The linkage rod (98) is connected to the third module (903) and the motor (100), and is used to drive the third module (903) and the motor (100) to approach or move away from each other.

9. The complete set of devices for low-carbon resource conversion of a flexible membrane treatment system for high-salt wastewater according to claim 8, characterized in that: The first module (901) is flange-connected to the second module (902), the second module (902) is flange-connected to the third module (903), the linkage rod (98) penetrates through the edges of the first module (901), the second module (902), the third module (903) and the motor (100), and the linkage rod (98) is threadedly connected between the third module (903) and the motor (100).

10. A complete set of devices for low-carbon resource utilization of a flexible membrane treatment system for high-salt wastewater according to claim 8, characterized in that: A cooling pipe and a temperature sensor are arranged in the motor (100). The cooling pipe is spirally wound around the shell of the motor (100). The cooling pipe is used for allowing a coolant to enter and circulate. The temperature sensor is used for detecting the temperature of the motor (100). When the temperature of the motor (100) rises, the circulation of the coolant in the motor (100) is automatically started.

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