9 results about "Membrane method" patented technology

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 embodiment of the invention discloses a copious cooling membrane method oxygen enrichment device which comprises a first container C1, a second container C2, a first oxygen enrichment device, a second oxygen enrichment device and a third oxygen enrichment device, the normal oxygen liquid air production device is used for conveying low-temperature normal oxygen liquid air to the upper part of the tower plate in the first container C1; the blast air production device is used for conveying low-temperature blast air to the lower part of the tower plate in the first container C1; wherein the normal oxygen liquid air production device comprises a second container C2, and a condensation evaporator is arranged in the second container C2; the first container C1 is respectively connected with a normal oxygen liquid air outlet of the condensation evaporator and the top of the second container C2; and the top of the second container C2 is also provided with an oxygen-enriched air leading-out pipeline. According to the technical scheme, under the condition of meeting the rich oxygen demand of a user, refrigeration of an expansion machine is not needed, the technological process is simple, the cost is lower than that of rich oxygen preparation through rectification, and the economic benefits of enterprises are improved.

The application relates to the technical field of seawater desalination, and discloses a membrane method seawater desalination system capable of stably recycling concentrated water. The system comprises a first-stage two-section seawater reverse osmosis device, a first-stage two-section fresh water reverse osmosis device, an industrial water tank and a concentrated water discharge port. Raw seawater enters the seawater reverse osmosis device, the water produced by the seawater reverse osmosis device is connected to the industrial water tank and the fresh water reverse osmosis device in two ways, and the concentrated water is discharged and returned to the water inlet of the seawater reverse osmosis device in two ways; the water produced by the fresh water reverse osmosis device is connected to the industrial water tank, and the concentrated water is returned to the water inlet of the seawater reverse osmosis device. The system can adapt to wide-range water TDS fluctuation, simultaneously produce high-quality industrial water and concentrated water with stable concentration, improve water resource utilization rate and reduce operation cost.

The invention discloses a double-membrane seawater desalination and water regeneration device and method, and particularly relates to the field of water treatment.The double-membrane seawater desalination and water regeneration device comprises ultrafiltration units and reverse osmosis units, the ultrafiltration units are longitudinally arranged and communicated with the transversely arranged reverse osmosis units through bent pipes, and the water inlet ends of the ultrafiltration units are fixedly communicated with T-shaped pipes; a left side port of the T-shaped pipe is fixedly communicated with a water inlet pipe I through a flange, a right side port of the T-shaped pipe is fixedly communicated with a water inlet pipe II through a flange, and a switching valve is fixedly mounted on the T-shaped pipe. The T-shaped pipe can achieve independent water inlet or combined water inlet switching of the first water inlet pipe and the second water inlet pipe through the switching valve, seawater to be treated can be connected into the first water inlet pipe, regenerated water raw water can be connected into the second water inlet pipe, and independent treatment or mixed treatment of the two water sources is achieved by adjusting the opening degree of the switching valve. The double-working-condition operation requirements of seawater desalination and reclaimed water preparation are met; therefore, the effect of freely switching water inlet sources is achieved.

This application relates to a seawater desalination system and method based on thermal-membrane coupling. The system includes a flue gas waste heat extraction device, a thermal desalination device, and a membrane desalination device; the flue gas waste heat extraction device is connected to both the thermal and membrane desalination devices; the flue gas waste heat extraction device is used to absorb the heat from the flue gas generated during the operation of the coal-fired power unit and generate a heat transfer medium adapted to the heat of the flue gas; the thermal desalination device is used to convert seawater entering the thermal desalination device into concentrated brine and primary freshwater using the heat transfer medium as the driving heat source; the membrane desalination device is used to desalinate the seawater entering the membrane desalination device to obtain secondary freshwater; the temperature of the concentrated brine is higher than that of the seawater entering the membrane desalination device; the seawater is preheated by the heat transfer medium and concentrated brine before entering the membrane desalination device, and the use of this system can improve the system energy efficiency.

The utility model provides a kind of degassing structure based on constant low pressure and gas volume measurement, first, the liquid (for example transformer oil) to be degassed enters the degassing cavity inside the degassing chamber. The heating element arranged on the degassing chamber heats the liquid, increases the temperature of the liquid, thereby reduces the solubility of the dissolved gas therein, and promotes the release of the gas in free state. The characteristic gas released is rapidly circulated and uniformly distributed in the gas circuit by the air pump, and the gas circulation generates bubbles in the liquid, which can increase the gas-liquid contact area and further improve the degassing efficiency. The liquid is circulated in the oil circuit by the oil pump, which plays a role in stirring the liquid in the degassing chamber to improve the degassing efficiency. Through the comprehensive synergistic effect of heating, air extraction, bubbling and stirring, the problem of low degassing efficiency of traditional permeation membrane method is solved. The displacement amount of the piston in the cylinder can be used to reflect the gas volume entering the cylinder, and thus direct measurement of the volume of the released gas is realized.

The application discloses a kind of online permeation cleaning forward osmosis-nanofiltration integrated membrane method seawater desalination method, comprising: a seawater, draw solution is respectively sent into the raw material liquid side and draw solution side of forward osmosis system, concentrated water is sent into raw material liquid tank, and product water is sent into draw solution tank;B after dilution draw solution is sent into nanofiltration system, concentrated water side after concentration product water is sent into concentrated water tank, and product water of clean water side is sent into product water tank;C when the product water rate of nanofiltration system clean water side drops to set product water rate, forward osmosis system and nanofiltration system are closed, and solution in nanofiltration system membrane assembly is discharged;D concentrated water in concentrated water tank is sent into permeation cleaning liquid tank as cleaning liquid, cleaning liquid in permeation cleaning liquid tank is sent into the concentrated water side of nanofiltration system, and product water in product water tank is sent into nanofiltration system clean water side, and nanofiltration membrane is carried out online permeation cleaning.The method of the application adopts the coupling mode of forward osmosis technology and nanofiltration technology, realizes low energy consumption seawater desalination, and realizes online cleaning of nanofiltration membrane simultaneously.

The application relates to the technical field of salt-removing water, and discloses a full-membrane method device for deep treatment of salt-removing water, which comprises a sealing frame, a supporting frame fixedly connected to the bottom of the sealing frame, a sliding channel fixedly connected to the surface of the sealing frame, a sliding door slidingly connected to the inner wall of the sliding channel, and a handrail fixedly arranged on the surface of the sliding door. The vibration mechanism is arranged, the transmission wheel is driven to rotate, the power belt is driven to rotate, the power wheel is driven to rotate, the rotating shaft is driven to rotate, the rotating wheel on the surface of the rotating shaft is driven to rotate, the rotating shaft drives the rotating wheel to rotate, the vibration roller is driven to rotate, the vibration roller is rubbed with the surface of the vibration plate to generate vibration, the vibration plate drives the vibration rod to vibrate up and down, the vibration rod drives the vibration spring to vibrate, the plate drives the transmission rod to transmit power, the salt on the surface of the salt-removing membrane is effectively and quickly vibrated down, and the service life of the salt-removing membrane is prolonged.