15 results about "Reverse osmosis desalination" patented technology

The application belongs to the technical field of comprehensive management of saline-alkali land and circular agriculture, and particularly relates to a multi-stage circular agriculture system and method for saline-alkali land based on multi-stage resource utilization of saline-alkali water, which comprises the following steps: through the technical chain of terrace land reclamation, seawater-like regulation, reverse osmosis desalination, planting and breeding coupling and tail water circulation, efficient cyclic utilization of natural resources in the saline-alkali area is realized. The method mainly comprises the following steps: after the saline-alkali water in the saline-alkali area is detected, the saline-alkali water is extracted for seawater-like regulation, the regulated saline-alkali water is obtained, and then the saline-alkali water is desalinated through a reverse osmosis system, and fresh water and seawater-like water are obtained, which are used for crop planting and aquatic product breeding, respectively, and the breeding tail water is recycled after solid-liquid separation. The system and method have the advantages that the system does not need external supply of fresh water, is self-contained, achieves win-win of ecological benefit, social benefit and economic benefit, realizes green and sustainable development, and has universal popularization value for comprehensive development and utilization of saline-alkali land.

The invention discloses a shale gas produced water desalination system regulated and controlled by a dynamic electric field, which comprises an electrochemical hardness removal unit (11), a microfiltration interception unit (13), a reverse osmosis desalination unit (12) and a controller (10), the electrochemical hardness removal unit (11), the microfiltration interception unit (13) and the reverse osmosis desalination unit (12) are sequentially arranged along the inflow direction, the electrochemical hardness removal unit (11) is used for removing hardness components in water through a dynamic electric field, the microfiltration interception unit (13) is used for intercepting precipitates and suspended particles, and the reverse osmosis desalination unit (12) is used for reducing salt; and the controller (10) is respectively connected with the electrochemical hardness removal unit (11) and the reverse osmosis desalination unit (12) and is used for dynamically adjusting the polarity of an electrode so as to relieve membrane pollution in an electric field transformation mode. The invention solves the problems of low efficiency and serious membrane pollution caused by hardness removal and desalination separation in the traditional shale gas produced water treatment process.

The application provides a membrane seawater desalination system for large temperature difference and a control method, the membrane seawater desalination system for large temperature difference comprises a water supply module, a high-pressure module, a reverse osmosis desalination module, an energy recovery module and a PLC controller, the high-pressure module comprises M sets of high-pressure pump groups arranged in parallel, the high-pressure pump group comprises a booster high-pressure pump and a high-pressure pump arranged in series along the water flow direction; the energy recovery device has N sets of energy recovery devices corresponding to the reverse osmosis devices in the reverse osmosis desalination module one by one, wherein M < N; each set of energy recovery device is matched with one energy recovery booster pump and one second water supply pump simultaneously. The first water supply pump, the second water supply pump, the high-pressure pump, the booster high-pressure pump, the energy recovery booster pump and the low-pressure circuit and the high-pressure circuit are optimally combined, so that the number of high-pressure pumps and the use of high-power frequency converters are reduced, the investment cost is reduced, and the system operation efficiency and the safety redundancy are improved.

The present application relates to the technical field of renewable energy development and seawater desalination, and discloses a deep-geological-ocean energy coupling utilization system and a running method. The system comprises a seawater taking unit, a horizontal full-pipe pressure flow transmission pipeline, a hydraulic power generation unit, a seawater desalination unit and a deep well group unit, and is sequentially connected to form a closed loop through the deep well-pipeline combination constructed by a deep-geological engineering. The present application forms a stable triangular hydraulic distribution along the whole pipeline by artificially setting a water head difference, thereby ensuring that multiple water turbines independently work and power is stably superimposed. The present application can realize long-distance water transmission through the deep well-pipeline, utilize natural energy to assist seawater desalination, and drive reverse osmosis desalination by using the high water head pressure energy of the deep well to generate power. Surplus power can be sent out.

A method of desalinating water, including the steps of when electricity costs between a first predetermined price and a second predetermined price, fill water is pumped into a reverse osmosis desalination unit to yield desalinated permeate and saltwater having a first salinity, when electricity costs less than the first predetermined price, fill water is pumped into a reverse osmosis desalination unit to yield desalinated permeate and saltwater having a second salinity, and when electricity costs greater than the second predetermined price, pure water is flowed into a reverse osmosis unit to yield pressurized saltwater which is run through a turbine to generate electricity. The first salinity is lower than the second salinity.

This invention is applicable to the field of oilfield wastewater treatment and provides a method for efficient reuse of oilfield wastewater in boilers based on high-temperature resistant membranes and reverse osmosis. The method includes the following steps: pretreatment conditioning: controlling the wastewater temperature at 50-80℃ and adjusting the pH to 10.5-11.5; using a high-temperature resistant special filter membrane for oil removal, suspended solids removal, hardening removal, and silica removal; two-stage anti-fouling reverse osmosis desalination; in this invention, by reducing the amount of chemicals added, the cost of chemicals is reduced by 40% compared to traditional processes, reducing dependence on chemicals and thus effectively lowering treatment costs and improving the economic benefits of oilfield wastewater treatment; by optimizing the treatment process, the amount of sludge generated is reduced, lowering the difficulty and cost of sludge treatment, and also reducing the potential environmental hazards of sludge.

The invention discloses a saline-alkali soil remediation system, and belongs to the technical field of saline-alkali soil remediation. The water taking module pumps underground water and conveys the underground water to the desalting module, and the desalting module performs desalting treatment on the underground water and then separates out fresh water and concentrated water; fresh water is conveyed to the irrigation and planting module for planting and cultivation in the saline-alkali soil; concentrated water is conveyed to a salt separation module for concentration treatment, concentrated salt is conveyed to a salt recovery module, and an industrial-grade salt product is obtained after purification and drying. According to the method, a desalination-micro-irrigation-airing-salt separation system is established, namely, a reverse osmosis desalination device or an electro-adsorption desalination device is installed at an underground water pump opening, a desalination module is combined with a local micro-irrigation system, micro-irrigation is conducted through fresh water produced by the desalination device, and after the saline-alkali soil is irrigated with the fresh water for 3-5 years, the physical and chemical properties of the soil can be remarkably improved; the agricultural utilization is preliminarily realized.

The present application belongs to the technical field of boiler make-up water treatment in thermal power plant, and discloses an intelligent control system and method for reverse osmosis device of boiler make-up water system in thermal power plant, which comprises the following steps: ultrafiltration water is sent into an ultrafiltration water tank for buffering, and is pressurized and transported by two parallel reverse osmosis water pumps; after being mixed, scale inhibitors, reducing agents and non-oxidizing bactericides are added by three mixers respectively; after being detected by a water quality sensing device, the water is sent into a security filter for filtration; after being filtered, the water is pressurized by a reverse osmosis high-pressure pump, and after being detected, the water is sent into two-stage reverse osmosis devices for desalination in turn, and the concentrated water is discharged after being converged; the produced water is converged to a produced water mother pipe, and after being detected, the unqualified produced water is discharged by a control valve, and the qualified produced water is sent into a reverse osmosis water tank for collection, so that the reverse osmosis desalination treatment of make-up water is completed, and efficient and stable control is realized.

The present invention relates to a sequential circulation reverse osmosis desalination apparatus, and more particularly to a sequential circulation reverse osmosis desalination apparatus that employs closed-circuit reverse osmosis technology to ensure a fundamentally high recovery rate, and sequentially applies reverse reverse osmosis technology to reduce fouling, while performing highly efficient water treatment without a separate energy recovery device.

The invention discloses a polar region seawater desalination treatment system, which relates to the technical field of seawater desalination, and comprises a pre-treatment unit, a primary filter, a secondary filter, an RO (reverse osmosis), a desalination water storage tank, a living water supply pipeline, a shell activated carbon filter and an ultraviolet disinfection water tank, a main industrial online water quality sensor for monitoring a water quality health value in real time is arranged in the desalination water storage tank; according to the method, a whole-distance closed loop of monitoring, decision making, execution, guarantee and pre-judgment is constructed by taking a water quality health value as a core, so that the core problem that the water quality of seawater desalination reaches the standard in a special environment is solved, and meanwhile, the energy limitation of a remote region is adapted through energy consumption optimization; through fault guarantee and remote operation and maintenance, the system is adapted to unattended scenes or scenes with inconvenient operation and maintenance; and through active pre-judgment and targeted treatment, continuous, stable and high-quality water supply in an extreme environment is ensured, and a safe, efficient, intelligent and reliable comprehensive water supply target is finally achieved.

The present application relates to the technical field of mine water treatment, and particularly relates to a method and system for step-by-step softening and silicon removal of coal mine water by a membrane method, comprising the following steps: A) coagulating and clarifying the coal mine water; B) removing calcium and softening and preliminarily removing silicon from the effluent obtained in step A); C) adjusting the pH value of the effluent obtained in step B) to 7.8-8.3 and then performing sterilization treatment; D) performing ultrafiltration and reverse osmosis desalination treatment on the effluent obtained in step C); E) removing magnesium and softening and deeply removing silicon from the reverse osmosis concentrated water obtained in step D); and F) performing filtration treatment on the effluent obtained in step E). The process adopted by the present application is short and efficient, calcium and magnesium ions can be recovered and utilized in steps, the softening and silicon removal effects are good, the membrane method treatment makes the system effluent reach the industrial and agricultural recycled water standards, and the subsequent combination with a deep treatment process can realize zero discharge of the coal mine water.

The system comprises a wave energy converter comprising a moveable body 2 exposed to wave motion coupled to a seawater pump 6 adapted to pump seawater through a reverse osmosis desalination system. An

This invention relates to the field of water treatment technology and discloses a high-efficiency and energy-saving new energy seawater desalination device and its desalination process, comprising a main body with two filter tanks fixedly connected to the top of the main body. When the filter media inside one of the support frames becomes caked, the flow of seawater can maintain stable filtration through backwashing, while the filter media inside the other support frames continue to filter the seawater normally. This reduces the long-term retention of impurities in the seawater by the filter media inside the support frames, preventing clogging and caked-up of the filter layer that would affect the filtration efficiency and desalination process. This ensures the stability of subsequent reverse osmosis desalination and improves the desalination efficiency.

An assembly for reverse osmotically desalinating water, including a source containing feed water to be desalinated, a high-pressure tank having a first portion and a second portion and a movable piston wall operationally connected therebetween, a first portion inlet operationally connected to the first portion and a second portion inlet operationally connected to the second portion, a first portion outlet operationally connected to the first portion and a second portion outlet operationally connected to the second portion, a first valve having a first first valve inlet, a second first valve inlet, a first first valve outlet in fluidic communication with the first portion inlet and a second first valve outlet in fluidic communication with the second portion inlet, a high-pressure pump operationally connected to the source and to the first first valve inlet, a second valve having a first second valve inlet in fluidic communication with the first portion outlet and a second second valve inlet in fluidic communication with the second portion outlet and a second valve outlet, at least one reverse osmosis module having at least one reverse osmosis module inlet connected in fluidic communication with the second valve outlet, at least one brine outlet and at least one desalinated water outlet, a circulation pump having a circulation pump inlet port connected in fluidic communication with the brine outlet and a circulation pump outlet connected in fluidic communication with the second first valve inlet, and an electronic controller operationally connected to the first valve, to the second valve, to the high-pressure pump and to the circulation pump.

This utility model relates to a reverse osmosis desalination device, including a reverse osmosis treatment structure. The inlet end of the reverse osmosis treatment structure is connected to a pretreatment structure. A connecting pipe 1 is connected to the outlet end of the frame structure, and the other end is connected to the inlet port of a water pump 1 installed on the frame structure. The outlet port of the water pump 1 is connected to a connecting pipe 2, which has two ports. One port is equipped with an electric butterfly valve 1, and the other port is equipped with an electric butterfly valve 2. The outlet end of the pretreatment structure is connected to a connecting pipe 3, which has two ports, each port being individually connected to the pretreatment structure. One set of ports is equipped with an electric butterfly valve 3, and the other set of ports is equipped with an electric butterfly valve 4. An electric butterfly valve 5 is connected to the connecting pipe 3, and one end of the connecting pipe 3 is connected to the connecting pipe 4, which is connected to the reverse osmosis treatment structure. This utility model solves the problem of frequent replacement of RO reverse osmosis units in existing reverse osmosis desalination devices.