Traction type combined plunger valve for seawater desalination energy recovery device

Abstract

The invention discloses a traction type combined plunger valve for a seawater desalination energy recovery device. The traction type combined plunger valve comprises a traction machine I, two piston rods, four groups of piston cylinders, eight pistons and four connecting ports. The piston cylinder I and the piston cylinder III are positioned above and below the same side and share one piston rod I; the piston cylinder II and the piston cylinder IV are positioned above and below the same side and share one piston rod II; the piston cylinder I and the piston cylinder III as well as the piston cylinder II and the piston cylinder IV are respectively positioned below the side of the traction machine I; two groups of pistons are arranged in each group of piston cylinders; two ends of a connecting rope of the traction machine I are respectively connected with the piston rod I and the piston rod II; and a group of interfaces are arranged outside each group of piston cylinders. According to thetraction type combined plunger valve, a membrane method seawater desalination traction push-pull type integrated overlying device is greatly simplified, the structure is more compact, the reliabilityof the device is improved, and the maintenance requirement of the system is also greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and in particular relates to a traction type combined plunger valve in a traction push-pull integrated stacking device or a valve-controlled energy recovery device for membrane seawater desalination. Background technique [0002] Reverse osmosis desalination, as an important high-tech means to produce fresh water, has been widely used around the world. In the reverse osmosis seawater desalination process, the energy recovery device has become one of the key equipment, which is mainly used to recover and utilize the pressure energy in the high-pressure concentrated brine, which is very important to greatly reduce the energy consumption of the system and the cost of water production. In recent years, with the rapid development of energy recovery technology and devices, the specific energy consumption of water produced by the reverse osmosis seawater desalination system body has been r...

AI Technical Summary

Problems solved by technology

[0004] Existing valve-regulated energy recovery devices (such as figure 1 In the membrane-based seawater desalination traction push-pull integrated stacking device shown above, there are four single-disc dual-phase steel wafer check valves that are in working condition for a long time, so it is easy to cause the shaft hole of the valve core to be worn out. Oval, causing the valve core to sink, coupled with frequent openings, severely damaged the sealing surface of the valve seat, thus forming a serious internal leakage problem

In addition, it may be due to its manufacturing defects or the influence of medium corrosion, resulting in cracks in the external sealing part, causing pipeline leakage

[0005] The invention proposes to replace a two-position four-way reversing valve and four check valves on a valve-controlled energy recovery device with a traction-type combined plunger valve, which solves the problem that the check valve is easily damaged; its economy and Reliability has been further improved

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