5results about How to "Avoid concentration polarization" patented technology

This invention provides a multifunctional bipolar membrane electrodialysis device, belonging to the technical field of electrodialysis separation equipment. The multifunctional bipolar membrane electrodialysis device includes a working chamber, a stacked membrane assembly, a brine storage tank, an acid storage tank, an alkali storage tank, an electrode liquid storage tank, and four peristaltic pumps. The four peristaltic pumps are fixed inside the working chamber, and the stacked membrane assembly is fixed at the front end of the working chamber. The left electrode chamber frame plate, acid chamber frame plate, brine chamber frame plate, alkali chamber frame plate, and right electrode chamber frame plate are all square flat plates with flow channels formed between the inlet and outlet channels. The flow channels contain horizontally staggered guide plates, each with a row of serrations on its lower surface. The horizontally staggered guide plates combined with the serrated flow disturbance structure in the flow channels force solution agitation and diffusion, prolonging the flow time of the solution within the flow channels, covering the entire membrane surface, eliminating dead zones and short-circuit flow, and significantly improving ion migration efficiency and current efficiency.

The invention discloses a novel PEM electrolytic cell with an enhanced diffusion type flow channel structure, which comprises an electrolytic chamber structure, the electrolytic chamber structure is sequentially composed of a cathode plate, a cathode diffusion layer, a membrane electrode, an anode diffusion layer and an anode plate and is fixed through fasteners, and the surfaces of the adjacent sides of the anode plate and the cathode plate are provided with protruding structures to form a flow channel group. According to the novel PEM electrolytic bath, the protruding structures are arranged on the inner sides of the anode plate and the cathode plate to form the flow channel set, so that an electrolyte forms a directional flow path in the flow channel, the electrolyte is effectively guided to be distributed to the whole catalytic area, and local drying or concentration polarization is avoided. The flow channel structure provides a clear escape channel for generated hydrogen (cathode) and oxygen (anode), the residence time of bubbles on the surface of the catalyst is shortened, and ohmic impedance and overpotential are reduced. And the functional layers are connected by adopting fasteners, so that the assembly, disassembly and maintenance are convenient, and the device is suitable for a large-scale stacked PEM electrolytic cell system.

The utility model provides a kind of filtering membrane structure of spherical graphite reverse osmosis device belongs to spherical graphite reverse osmosis device technical field, the filtering membrane structure of this spherical graphite reverse osmosis device includes: spherical shell, filter membrane component, support framework, water inlet pipeline, water outlet pipeline and sealing ring;The spherical shell is made of stainless steel material, the surface of spherical shell is equipped with water inlet and water outlet, water inlet is located in the upper hemispherical surface of spherical shell, and water outlet is located in the lower hemispherical surface of spherical shell;The filter membrane component is arranged inside spherical shell, and the filter membrane component includes graphite filter membrane and membrane fixed frame, the graphite filter membrane is spherical and concentrically arranged with the inner surface of spherical shell;It can solve the technical problems that the filtering membrane structure of spherical reverse osmosis device in the prior art has uneven stress on membrane material, insufficient support strength, unreasonable fluid distribution, low filtration efficiency and short membrane life.

This invention discloses a reverse osmosis pure water production method and equipment based on the synergistic purification of a two-stage membrane module, relating to the field of wastewater treatment technology. In the water quality monitoring stage after pretreatment, this invention performs preliminary feed water optimization on the desalination process of the reverse osmosis module based on acquired ion migration state data to reduce the scaling rate on the reverse osmosis membrane surface. Then, based on the salinity of the feed water at the inlet corresponding to the first-stage reverse osmosis membrane after the preliminary feed water optimization, pressure-flow rate synergistic control is implemented for the pressure fine desalination process of the first-stage reverse osmosis membrane, while simultaneously adjusting the circulation flow rate. Finally, based on the conductivity at a designated location within the feed water buffer tank of the first-stage reverse osmosis membrane, and combined with the feedback status of the permeate water quality from the second-stage reverse osmosis membrane, the feed water parameters of the reverse osmosis module are adjusted. This achieves refined, adaptive, and synergistic control of the reverse osmosis module, effectively solving the problem of desalination efficiency fluctuations caused by pressure difference changes in the application of two-stage membranes in existing technologies.

The utility model discloses a membrane separation and adsorption combined advanced treatment technology device aiming at electrophoresis wastewater, which comprises a working bottom plate, a water purification cylinder is fixedly connected to one side of the working bottom plate, and a drainage pipe is arranged on one side of the water purification cylinder; one side of the precipitation assembly is fixedly connected with the top of the working bottom plate, and the precipitation assembly is used for precipitating large-particle impurities in the electrophoresis wastewater; the bottom of the purification assembly is fixedly connected with the two sides of the inner wall of the water purification cylinder, and the purification assembly is used for carrying out purification treatment on the precipitated electrophoresis wastewater. According to the membrane separation and adsorption combined advanced treatment technology device for electrophoresis wastewater, the purification assembly is arranged, two purification plates with different heights are adopted, identification and replacement are convenient, and a subsequent water pump is matched, so that the membrane separation and adsorption combined advanced treatment technology device is a low-energy-consumption process form for driving membrane filtration through liquid level difference.