7 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 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.

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.

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.

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.