Energy conversion system for desulfurization wastewater zero discharge

Abstract

The invention belongs to the technical field of desulfurization wastewater treatment, and specifically relates to an energy conversion system for desulfurization wastewater zero discharge. The systemcomprises a raw water supply device, an energy conversion device, a reverse osmosis device, a pump and the like, wherein the energy conversion device comprises a water pressure cylinder, a check valveset and a sealing reversing valve, the water pressure cylinder comprises a water pressure cylinder body, a water pressure cylinder piston and a water pressure cylinder piston guide rod, the water pressure cylinder piston is arranged in the water pressure cylinder body and can reciprocate, the water pressure cylinder piston guide rod can act along with the water pressure cylinder piston, the contact area between the water pressure cylinder piston and high-pressure raw water is smaller than the contact area between the water pressure cylinder piston and high-pressure concentrated water, a waterpressure cylinder piston boss is arranged on the end surface, facing the opening of the water pressure cylinder end cover, of the water pressure cylinder piston, and part or all of the water pressurecylinder piston boss can enter the opening of the water pressure cylinder end cover, so that the impact force between the water pressure cylinder piston and the water pressure cylinder end cover whenthe water pressure cylinder piston is out of control in operation can be reduced so as to effectively protect the water pressure cylinder piston.

Description

technical field [0001] The invention belongs to the technical field of desulfurization wastewater treatment, and in particular relates to an energy conversion system for zero discharge of desulfurization wastewater. Background technique [0002] At present, my country's standard requirements for wastewater discharge are very strict, and water environmental protection has been raised to the level of national construction strategy. As far as power plants are concerned, as a large water and drainage user, their water consumption accounts for 20% of the total industrial water use. From multiple perspectives, cascade utilization, concentration reduction, and water conservation are of great significance for power plants to achieve zero discharge of desulfurization wastewater. [0003] The current 2×600MW thermal power generation unit usually has a desulfurization wastewater volume of about 15t / h. With the improvement of the country’s sewage discharge standards for the environmenta...

AI Technical Summary

Problems solved by technology

However, during the operation of the existing hydraulic cylinder type energy conversion device, after the high-flow high-pressure concentrated water is filled into the hydraulic cylinder, the raw water in the hydraulic cylinder is rapidly increased in pressure, which causes the check valve at the raw water inlet end to close quickly, so that the valve plate is in contact with the hydraulic cylinder. The valve body knocks instantaneously, and frequent instant knocking greatly reduces the service life of the check valve

After the energy conversion is completed, adjust the reversing device at the concentrated water end of the hydraulic cylinder, and the concentrated water with residual pressure will be discharged from the hydraulic cylinder. Interface water hammer causes frequent vibration of the reversing device to generate noise, which seriously affects the service life of the reversing device and the safety of the entire energy-saving device, which is not conducive to the stability of the energy conversion system for zero discharge of desulfurization wastewater

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