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Equipment and process for improving reverse osmosis efficiency by heat recovery

A technology of heat recovery and reverse osmosis, applied in the direction of osmosis/dialysis water/sewage treatment, special treatment targets, water/sewage treatment, etc., can solve the problems of high reverse osmosis efficiency, sealing, and reverse osmosis efficiency to be improved, and achieve improvement Effect of reverse osmosis efficiency

Active Publication Date: 2020-07-03
SAINYEAR HLDG GRP HANGZHOU COGENERATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above existing technical solutions have the following defects: during reverse osmosis, the pressure difference on both sides of the semi-permeable membrane is the value of the salt water side pressure minus the fresh water side pressure, and the greater the pressure difference, the higher the efficiency of reverse osmosis
Existing reverse osmosis systems only increase the pressure on the brine side. Excessive pressure can easily lead to sealing problems, and the efficiency of reverse osmosis still needs to be improved.

Method used

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  • Equipment and process for improving reverse osmosis efficiency by heat recovery
  • Equipment and process for improving reverse osmosis efficiency by heat recovery

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Experimental program
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Effect test

Embodiment 1

[0037] refer to figure 1 , which is a device for recovering heat and improving reverse osmosis efficiency disclosed in the present invention, comprising a reverse osmosis device, a boiler 1 , a jet pump 2 , and a fresh water tank 3 .

[0038] The inner bottom of the boiler 1 is provided with a hot water area 11, and the top of the boiler 1 is provided with a steam pipe 12 for letting out steam. The jet pump 2 is an atmospheric jet pump or a steam jet pump. The jet pump 2 has an air inlet 21, an exhaust port 22, and a suction port 23. The jet pump 2 communicates with the steam pipe 12 through the air inlet 21 and the exhaust port 22. The air port 21 is closer to the boiler 1 than the exhaust port 22 , the air extraction port 23 is connected with an air extraction pipe 24 , and the other end of the air extraction pipe 24 is connected to the inner top of the fresh water tank 3 , and the air extraction port 23 is located above the fresh water tank 3 . When the boiler 1 is working...

Embodiment 2

[0046] A process for recovering heat to improve reverse osmosis efficiency, including two states of boiler 1 running and boiler 1 shutting down.

[0047] When boiler 1 is running:

[0048] The steam flows out of the boiler 1 through the steam pipe 12 and the jet pump 2. Due to the working principle of the jet pump 2, the suction port 23 generates suction, which acts on the fresh water chamber 42 through the suction pipe 24 and the fresh water tank 3, reducing the fresh water chamber 42. If the pressure is higher, the pressure difference between the salt water chamber 41 and the fresh water chamber 42 increases to improve the reverse osmosis efficiency. When the water level of the fresh water tank 3 was lower than the exhaust pipe 24, the water in the fresh water tank 3 would not enter the jet pump 2.

[0049] The valve three 44 is in a normally closed state, and the brine outlet 412 is also in a normally closed state, and the fresh water tank 3 is provided with a drain, which...

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Abstract

The invention discloses equipment and a process for improving reverse osmosis efficiency by heat recovery, and relates to the technical field of heat recovery. The equipment comprises a reverse osmosis device, and further comprises a boiler, an injection pump and a fresh water cabinet, a circulating pipe is arranged outside the boiler, the two ends of the circulating pipe are communicated with a hot water areas, the circulating pipe penetrates through a saline water cavity and is connected with a circulating pump, and first valves are arranged at the two ends, close to the boiler, of the circulating pipe respectively; and a steam pipe for guiding out steam is arranged at the top of the boiler, the injection pump is provided with a gas inlet, a gas outlet and a gas extraction opening, the injection pump communicates with the steam pipe through the gas inlet and the gas outlet, the fresh water cavity communicates with the fresh water cabinet through a fresh water outlet, a gas extractionpipe communicates between the gas extraction opening and the inner top of the fresh water cabinet, and the gas extraction opening is located above the fresh water cabinet. According to the equipmentand the process, the reverse osmosis efficiency can be further improved by reducing the pressure of a fresh water side; and partial kinetic energy of steam is used for reducing the pressure of the fresh water side, and waste heat of water in the boiler can be recycled, so energy is saved.

Description

technical field [0001] The invention relates to the technical field of heat recovery, in particular to equipment and technology for improving reverse osmosis efficiency by heat recovery. Background technique [0002] Boiler is a common equipment for producing steam. When the boiler is shut down, the water inside still has waste heat. If it is cooled naturally, the energy will be wasted. The utilization of boiler waste heat has become an increasingly important research topic nowadays. [0003] Reverse osmosis, also known as ultrafiltration, is a method of separating salt water from fresh water by using a semi-permeable membrane that only allows solvents to pass through but not solutes to pass through. Under normal circumstances, fresh water diffuses to the brine side through the semi-permeable membrane, so that the liquid level on the brine side gradually rises until it stops at a certain height. This process is called osmosis. If an external pressure greater than the osmoti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44
CPCC02F1/441C02F2303/10
Inventor 高张泉
Owner SAINYEAR HLDG GRP HANGZHOU COGENERATION