Self-driven bladder type seawater or wastewater purification and supply device

Abstract

The utility model relates to a self-driven bladder type seawater or wastewater purification and supply device which comprises an outer chamber and inner chambers, the inner chambers are arranged in the outer chamber at intervals and are not communicated, and the outer chamber and the inner chambers are respectively provided with a liquid inlet and a liquid outlet to complete liquid circulation in the respective chambers; seawater or wastewater is circularly stored in the outer chamber, a seawater inlet pipe is arranged at the upper end of the outer chamber, a seawater return pipe is arranged at the lower end of the outer chamber, and a circulating pump is mounted between the seawater inlet pipe and the seawater return pipe, so that the seawater is circulated in the outer chamber; and a diaphragm is mounted on the side wall of the inner cavity, so that water in seawater or wastewater in the outer cavity enters the electrolyte of the inner cavity according to the ion concentration difference. The problems that in the prior art, a device is complex and inconvenient to disassemble and maintain, energy consumption is large, and one-step purification and pure water supply of complex raw water are difficult to achieve are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to wastewater recycling field especially relates to a self -driven bag type seawater or wastewater purification supply device. BACKGROUND

[0002] Hydrogen energy, as a high-quality secondary energy, has shown great application potential in the field of energy storage and utilization, and also plays a positive role in promoting the effective consumption of new energy power. In March 2022, the National Development and Reform Commission and the National Energy Administration jointly released the "Hydrogen Energy Industry Development Medium and Long-term Plan (2021-2035)", which clearly defines the strategic position of the hydrogen energy industry and its green and low-carbon development direction. Developing green hydrogen energy not only will promote the large-scale utilization of new energy in China, but also will inject strong impetus into realizing the "double carbon" goal and accelerating the green transformation process of China's development mode.

[0003] As a sustainable way to produce "green hydrogen", water electrolysis for hydrogen production, although promising, faces the severe challenge of large consumption of fresh water resources. This electrification method requires high-purity distilled fresh water as an electrolyte, making it extremely difficult to implement this technology in cities with insufficient fresh water supply. Given that seawater accounts for 96.5% of the total global water resources, directly electrolyzing seawater to produce hydrogen is undoubtedly a highly potential approach.

[0004] However, the reality is that few catalysts can remain stable in the harsh natural seawater environment. This is because the aggressive halogen ions (such as Cl — and Br — ) and their derivatives (e.g., hypochlorite) in seawater will aggressively attack the anode, while Mg 2+ / Ca 2+ precipitates will affect the stability of the cathode. These issues pose a serious challenge to the safety, efficiency, and durability of seawater electrolysis cells. If impurity ions in seawater can be removed, and pure water after purification is used for hydrogen production, it will greatly save hydrogen production and equipment operation costs.

[0005] Currently, the ultra-pure water required for electrolytic hydrogen production mainly relies on a complex process combining reverse osmosis and ion exchange, which not only has high purification costs, but also is complicated to operate. When using common reverse osmosis water treatment technology, pretreatment is also required according to the different qualities of the raw water. Due to the desalination rate and structural stability of the reverse osmosis membrane during operation, the permeate water often needs to go through a secondary ion exchange process to meet the national first-grade pure water standard (18MΩ*cm). In addition, existing conventional small and medium-sized seawater desalination devices generally have high investment costs, high energy consumption, are not easy to move, and have complex structures, and the requirements for raw water quality are also quite strict. SUMMARY

[0006] The utility model discloses a purpose is to solve the shortcoming of prior art, provide a kind of self-driving bag type seawater or wastewater purification supply device, to solve the problems of prior art device complex is not convenient to disassemble and maintain, energy consumption is big, it is difficult to realize the one-step purification of complex primary water and pure water supply.

[0007] In order to achieve the above object, the application adopts the following technical scheme:

[0008] A self-driving bag type seawater or wastewater purification supply device, comprising: an outer chamber and an inner chamber, the inner chamber is arranged in the outer chamber, and the outer chamber and the inner chamber are not connected, the outer chamber and the inner chamber are respectively provided with liquid inlet and outlet, and the liquid circulation in the respective chambers is completed.

[0009] The seawater or wastewater is stored in the outer chamber, and the seawater inlet pipe is provided at the upper end of the outer chamber, the seawater return pipe is provided at the lower end of the outer chamber, and the circulating pump is installed between the seawater inlet pipe and the seawater return pipe to realize the circulation of seawater in the outer chamber.

[0010] The electrolyte is stored in the inner chamber, the electrolyte inlet pipe is provided at the upper end of the inner chamber, the electrolyte return pipe is provided at the upper end of the inner chamber, the electrolyte inlet pipe and the electrolyte return pipe extend to the outer side of the outer chamber respectively, and the liquid isolation between the outer chamber and the inner chamber is realized, and the water pump is installed between the electrolyte inlet pipe and the electrolyte return pipe to realize the circulation of electrolyte.

[0011] The diaphragm is installed on the side wall of the inner chamber to realize the water in the seawater or wastewater in the outer chamber entering the electrolyte in the inner chamber according to the ion concentration difference.

[0012] Moreover, the diaphragm is a folded diaphragm.

[0013] Moreover, the tolerance temperature of the folded diaphragm is less than 160℃, and the thickness is 50-100μm.

[0014] Moreover, the heating coil is installed in the outer chamber shell.

[0015] Moreover, the outlet of the heating coil is connected to the external circulating heater.

[0016] Moreover, the outer chamber and the inner chamber can be cuboid, cylindrical or elliptical cylindrical.

[0017] The application has the following beneficial effects:

[0018] 1. The diaphragm is installed on the side wall of the inner chamber, the saturated vapor pressure difference of the solutions on both sides of the diaphragm is utilized, the gaseous water molecules in the low-concentration seawater or wastewater in the outer chamber reach the high-concentration electrolyte in the inner chamber through the diaphragm, and thus the self-driven pure water supply is realized.

[0019] 2、The outer chamber and the inner chamber of the device are communicated with the water pump, the liquid flowability of the outer chamber and the inner chamber is maintained through the water pump, the impurities are prevented from depositing on the membrane surface while increasing the pure water supply rate, the operation cost of the water purification and supply device is significantly reduced, the device has simple structure, wide application range, strong function integration, and can be applied to water purification and supply in seawater, industrial wastewater and the like. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the present application;

[0021] Figure 2 is a structural schematic view of the present application;

[0022] Figure 3 、 Figure 4 、 Figure 5 is a structural schematic view of the present application.

[0023] FIG. 1 is a seawater inlet, 2 is a seawater outlet, 3 is an electrolyte outlet, 4 is an electrolyte inlet, 5 is an outer shell, 6 is an outer chamber, 7 is a folded filter membrane, 8 is an inner chamber, 9 is a water pump, 10 is a water pump, 11 is an electrolytic cell, 12 is a water tank, 13 is a heating coil, and 14 is a circulating heater. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only 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 labor fall within the scope of protection of the present application.

[0025] A self-driven bag type seawater or wastewater purification and supply device comprises an outer chamber and an inner chamber, the inner chamber is arranged in the outer chamber and is not communicated, the outer chamber and the inner chamber are respectively provided with liquid inlets and outlets to complete liquid circulation in the respective chambers. The outer chamber and the inner chamber can be cuboids, cylinders or elliptical cylinders, and the present application does not have special requirements.

[0026] The outer chamber internally circulates and stores seawater or wastewater, a seawater inlet pipe is arranged at the upper end of the outer chamber, a seawater return pipe is arranged at the lower end of the outer chamber, and a circulating pump is arranged between the seawater inlet pipe and the seawater return pipe to realize seawater circulation in the outer chamber.

[0027] The inner chamber circulates and stores electrolyte. An electrolyte inlet pipe and an electrolyte return pipe are located at the upper end of the inner chamber. Both the inlet and return pipes extend to the outer side of the outer chamber, achieving liquid isolation between the inner and outer chambers. A water pump is installed between the inlet and return pipes to circulate the electrolyte.

[0028] To achieve stable electrolyte concentration and conserve pure water for electrolysis, this application, for the first time, installs a diaphragm on the side wall of the inner chamber. This allows seawater or wastewater from the outer chamber to enter the electrolyte within the inner chamber, thus stabilizing the electrolyte concentration. The diaphragm is a folded diaphragm, which allows seawater to enter the electrolyte based on differences in ion concentration. Any membrane with existing ion pressure difference functionality is acceptable, and this application does not impose any special limitations.

[0029] The diaphragm is located between the inner and outer chambers to isolate the solutions on both sides. The seawater inlet pipe, water pump, and seawater return pipe form the external seawater circulation path; the electrolyte inlet pipe, water pump, and electrolytic cell form the electrolyte return port, which constitutes the internal electrolyte circulation path.

[0030] The folded diaphragm has a temperature tolerance of less than 160℃, a thickness of 50-100μm, and is removable and replaceable.

[0031] The upper and lower inlet / outlet ports of the inner cavity are adapted to the liquid inlet and outlet of the alkaline electrolysis and proton exchange membrane electrolysis devices.

[0032] The inner and outer cavities are made of corrosion-resistant materials. The liquid inside the cavity can be heated to accelerate the migration rate of water.

[0033] Example 1

[0034] like Figures 1-2 As shown, a self-driven capsule-type seawater purification and supply device of this embodiment specifically includes: 1 seawater inlet, 2 seawater outlet, 3 electrolyte outlet, 4 electrolyte inlet, 5 outer shell, 6 outer chamber, 7 pleated filter membrane (pore size of pleated filter membrane: 0.10-0.22 micrometers, thickness: 30-70 micrometers), and 8 inner chamber.

[0035] This utility model is mainly divided into two parts: an external seawater circulation chamber and an internal electrolyte circulation chamber, which are separated by a folded diaphragm. In order to facilitate the maintenance of the device, the outer shell, the inner cavity, the folded diaphragm on the outside of the inner cavity, and the grid strips on the periphery of the inner cavity are all detachable components for later maintenance and replacement.

[0036] In this embodiment, the shell and the inner chamber material of the device use corrosion-resistant stainless steel or plastic materials including polysulfone, polytetrafluoroethylene, and the sealing fittings use corrosion-resistant materials such as silicone rubber, fluororubber, or polytetrafluoroethylene. In the embodiment of the utility model, the shape of the whole bag type electrolytic seawater electrolysis cell assembly is not limited, and can be designed according to the actual working environment, which can be cylindrical or rectangular or spherical. The size of the overall assembly is also not limited, and can be flexibly adjusted according to the demand of the electrolyte.

[0037] Embodiment 2

[0038] As shown in Figure 3 , a specific embodiment of a self-driven bag type seawater purification and supply device is shown.

[0039] The device electrolyte outlet 3 is connected to the electrolysis cell 11 through a pipeline, and the excess electrolyte after passing through the electrolysis cell is pumped back to the inner chamber 8 through the electrolyte return port 4 by the water pump 10, realizing the internal circulation of the electrolyte. The seawater in the outer chamber 6 is pumped through the seawater return port 1 and returned to the outer chamber, realizing the external circulation of the seawater, and a diaphragm 7 is arranged between the outer chamber and the inner chamber for isolating the two sides of the liquid. When starting to operate, the electrolyte needs to be supplemented, and the water pump 10 is controlled to work to deliver the electrolyte to the inner chamber. The seawater is supplemented in the same way, and the water pump 9 is operated to deliver seawater into the outer chamber. After starting the electrolysis cell, the circulation flow ratio of seawater and electrolyte is adjusted to 1:3-5. The seawater in the outer chamber is circulated at a small flow rate, and the deposits and adsorbents attached to the diaphragm and the pipeline are washed in time, thereby prolonging the service life of the device and the reverse osmosis membrane.

[0040] In this embodiment, the seawater / electrolyte inlet and outlet are connected by corresponding stainless steel or corrosion-resistant plastic according to the material of the shell and the inner chamber.

[0041] In this embodiment, the effective ion concentration in seawater should be less than the ion concentration in electrolyte. The ion concentration in electrolyte should be greater than 1 mol / L.

[0042] Embodiment 3

[0043] As shown in Figure 4 , this embodiment is basically the same as embodiment 2, except that one end of the seawater return pipeline is connected to the seawater settling device of the seawater storage tank 12, and the other end is connected to the seawater external circulation pipeline.

[0044] Embodiment 4

[0045] As shown in Figure 4 , this embodiment is based on embodiment 3, and a heating coil is arranged in the shell to heat the seawater and improve the permeation efficiency.

[0046] Embodiment 5

[0047] As Figure 5 shown, the embodiment is basically the same as that of Embodiment 4, except that a heating coil 13 is installed inside the outer chamber shell 5 for heating the circulating wastewater to promote the permeation, and the outlet of the heating coil is connected to an external circulating heater 14.

[0048] Finally, it should be noted that the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A self-powered bag-type seawater or wastewater purifying and supplying apparatus, characterized by comprising: The application relates to a seawater electrolysis device. The seawater electrolysis device comprises an outer chamber and an inner chamber, the inner chamber is arranged in the outer chamber and is not communicated, the outer chamber and the inner chamber are respectively provided with liquid inlets and outlets to complete liquid circulation in the respective chambers. The outer chamber is internally provided with seawater or waste water, a seawater inlet pipe is arranged at the upper end of the outer chamber, a seawater return pipe is arranged at the lower end of the outer chamber, a circulating pump is arranged between the seawater inlet pipe and the seawater return pipe, and seawater circulation in the outer chamber is realized. The inner chamber is internally provided with electrolyte, an electrolyte inlet pipe is arranged at the upper end of the inner chamber, an electrolyte return pipe is arranged at the upper end of the inner chamber, the electrolyte inlet pipe and the electrolyte return pipe respectively extend to the outer side of the outer chamber, liquid isolation between the outer chamber and the inner chamber is realized, a water pump is arranged between the electrolyte inlet pipe and the electrolyte return pipe, and electrolyte circulation is realized. A diaphragm is arranged on the side wall of the inner chamber, and water in seawater or waste water in the outer chamber enters electrolyte in the inner chamber according to ion concentration difference.

2. The self-powered bag-type seawater or wastewater purifying and supplying apparatus according to claim 1, characterized by: The diaphragm is a folded diaphragm.

3. A self-powered bag-type seawater or wastewater purifying and supplying apparatus according to claim 2, characterized by: The folded diaphragm has a tolerance temperature less than 160 DEG C and a thickness of 50-100 mu m.

4. The self-powered bag-type seawater or wastewater purifying and supplying apparatus according to claim 1, characterized by: A heating coil is arranged in the outer chamber shell.

5. A self-powered bag-type seawater or wastewater purifying and supplying apparatus according to claim 4, characterized by: The outlet of the heating coil is communicated with an external circulating heater.

6. The self-powered bag-type seawater or wastewater purifying and supplying apparatus according to claim 1, characterized by: The outer chamber and the inner chamber can be cuboids, cylinders or elliptic cylinders.

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