Seawater desalination wastewater pressure recovery device

Abstract

The invention relates to utilization of wastewater pressure generated after seawater desalination, in particular to a seawater desalination wastewater pressure recovery device. The seawater desalination wastewater pressure recovery device comprises a controller, electromagnetic valves and a pump body arranged in seawater. The pump body is internally provided with a hollow cavity. Two one-way valves are arranged on the pump body. A liquid outlet of one one-way valve is connected with the pump body. A liquid inlet of the other one-way valve is connected with the pump body, and a liquid outlet of the other one-way valve is connected with a raw water tank. An air bag is arranged in the cavity of the pump body, an opening of the air bag is connected with an opening of the pump body through a flange in a sealed mode, the air bag is communicated with a liquid inflow pipe and a liquid outflow pipe, the liquid inflow pipe of the air bag is connected with a wastewater pipe of a seawater desalination device, the water inflow electromagnetic valve is arranged on the liquid inflow pipe, the drainage electromagnetic valve is arranged on the liquid outflow pipe, and the water inflow electromagnetic valve and the drainage electromagnetic valve are both connected with the controller. Efficient recovery of seawater desalination wastewater pressure is achieved, and the purposes of saving energy and reducing emissions are achieved.

Description

technical field [0001] The invention relates to utilization of waste water pressure generated by seawater desalination, in particular to a pressure recovery device for seawater desalination waste water. Background technique [0002] my country is a country that lacks water resources. China has a coastline of 1,800 kilometers. With the continuous improvement of seawater desalination technology, the construction of seawater desalination projects is imperative. According to the 2014 National Seawater Utilization Report released by the State Oceanic Administration, the overall scale of seawater desalination projects has continued to grow in recent years. By the end of 2014, 112 seawater desalination projects had been built across the country, with a water production scale of 926,900 tons per day, and the largest seawater desalination project with a daily production capacity of 200,000 tons. Among the completed seawater desalination projects, the project scale of desalinated wat...

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Problems solved by technology

[0004] At present, the serious bottleneck problem in the implementation of seawater desalination is the cost issue, and the reason for the high cost of seawater desalination is that the direct drinking water produced after seawater desalination accounts for 35-40%, and the concentrated wastewater produced accounts for 60-65%. %, and the pressure of concentrated wastewater is very high, resulting in high electricity costs per ton of water, so many countries are developing seawater desalination concentrated water recovery devices, but the existing seawater desalination concentrated water recovery devices are expensive, complicated to recycle, mechanically Insufficient stability and other defects

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