Pressure stabilizing system for preventing water hammer damage of continuous electrodeionization system
An electric desalination and water hammer technology, applied in the field of water treatment, can solve the problems of limited weakening, prone to misoperation, no protection measures, etc., to reduce workload, protect operation safety, and reduce operating pressure fluctuations.
Pending Publication Date: 2022-04-05
XIAN TPRI WATER & ENVIRONMENTAL PROTECTION +1
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Problems solved by technology
This method can weaken the effect of water hammer to a certain extent, but the degree of weakening is limited, and misoperation is prone to occur. Once a large pressure fluctuation forms a water hammer, it will have an irreversible impact on the electrostatic desalination module, and there is no protection measure
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[0070] Taking a continuous electrostatic desalination system as an example, the design water volume is 100m 3 / h, calculate the volume of the surge tank, where the minimum working pressure of the electrostatic desalination system is 0.35MPa, the maximum working pressure is 0.45MPa, the rated working pressure of the system is 0.4MPa, and the safety system C of the surge tank is 1.2. The number of pressure fluctuations n is set to 6;
[0071] The adjusted water volume of the surge tank is:
[0072] The total volume of the surge tank is:
[0073] Specifically, when the EDI water supply pump 2 is started, due to the insufficient opening of the water inlet regulating valve, the pressure of the water pump is suppressed, and the instantaneous high-pressure water or water hammer formed by the sudden increase of the lift passes through the security filter 4 and first squeezes into the water inlet. In the surge tank 5, the nitrogen gas sealed in the air chamber 5-4 of the surge ta...
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A pressure stabilizing system for preventing water hammer damage of a continuous electrodeionization system utilizes a pressure stabilizing tank to balance the pressure of an inlet and an outlet, when instantaneous high-pressure water outside a water inlet pipe enters the electrodeionization system, the high-pressure water firstly enters the pressure stabilizing tank, air sealed in the tank is compressed, and according to the Boyle gas law, the volume of the compressed gas is reduced, and the pressure is increased; and the pressure of the gas in the pressure stabilizing tank is balanced with the pressure of the water. When the pressure is reduced or instantaneous negative pressure is formed after the water in the water outlet pipe is lost, the gas pressure in the pressure stabilizing tank is greater than the pressure of the water, and the air volume expands to extrude the water in the air bag out of the pressure stabilizing tank and supplement the water into the system until the gas pressure and the water pressure are balanced again. According to the pressure stabilizing method, large-amplitude pressure fluctuation during operation of the EDI device can be relieved, the water hammer effect is prevented, the EDI device can operate stably, and the operation safety of the system is guaranteed to the maximum extent.
Description
technical field [0001] The invention belongs to the field of water treatment, in particular to a voltage stabilizing system for preventing water hammer damage in a continuous electric desalination system. Background technique [0002] In the power plant boiler feed water treatment system, the full-membrane method has been more and more recognized by everyone. In the full-membrane electrostatic desalination system, the pressure fluctuations caused by the frequent start-up and shutdown of the equipment are not conducive to the stability of the water quality and shorten the EDI. The service life of the module, severe water hammer can also cause the plate to break or the filling resin to be crushed. [0003] At present, the commonly used method to prevent water hammer and reduce pressure fluctuation is to set the water inlet valve and unqualified product water discharge valve of the electric desalination system as a regulating valve, and weaken the instantaneous high pressure by...
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IPC IPC(8): C02F9/06
CPCY02A20/131
Inventor 孙军峰叶治安袁国全刘德庆贺峰尹萍董娟林莹莹刘贵栋周家材俞杰申伟庆
Owner XIAN TPRI WATER & ENVIRONMENTAL PROTECTION