Protector for energy recovery system

Abstract

The invention discloses a protector for an energy recovery system. The protector comprises a signal input circuit, a displaying, monitoring, and querying device, and a signal output circuit. The signal input circuit receives at least four signals from the energy recovery system, wherein at least two signals are flow signals and at least two signals are pressure signals. The displaying, monitoring, and querying device is used for displaying and monitoring the input at least four signals, and giving prompting, reminding and alarm in different degrees at a critical point, a dangerous point, and an over-limit point, and saving display data and alarm data. The display data and correlative alarm data can be output to a host computer through an Ethernet communication protocol. The host computer performs synchronous display and gives an alarm. The protector monitors flow and pressure in a water treatment zero-release system, and carries out a series of safeguard procedures such as alarm or the like so as to enable the energy recovery system to stably and highly efficiently operate. Further, the protector may store data within a certain time.

Description

technical field [0001] The invention relates to a zero emission system, in particular to a protector for an energy recovery system. Background technique [0002] When the energy recovery system is used in the zero emission system, there will be super-flow, low-flow, over-pressure, and low-pressure operation states. If the monitoring and alarm functions are not realized, the system operation will deviate from the design and cannot meet the user's design requirements. Cause damage to the energy recovery system. For example, the design recovery rate of zero-emission RO membranes generally reaches more than 85%, or even 95%, which greatly reduces the discharge of concentrated liquid, thereby reducing the treatment capacity of the subsequent evaporation system. How to achieve the high recovery rate of RO design, generally, waste water can be used to enter the first-stage RO, and RO concentrated water can be treated by RO reverse osmosis, and the concentrated water discharged fro...

AI Technical Summary

Problems solved by technology

In this case, the total dissolved solids (TDS) of concentrated water RO feedwater can generally reach more than 20,000mg / L, or even higher, while the high-pressure pump needs to provide a pressure of 30-60 kg, and the energy consumption of the high-pressure pump is extremely high. ERI The energy recovery device (PX) produced by the energy recovery company can be used in the zero-discharge reverse osmosis (SWRO) part, which can greatly recover the energy of concentrated water discharge and reduce the energy consumption of high-pressure pumps, but there is still a lack of necessary for the control of the PX system protection products

[0003] The existing technology has the following disadvantages: the protection of the stable operation of the energy recovery system cannot become a standard product, causing customers to only consider the operation of the system when designing the system, or omit, or consider it incompletely, or have insufficient understanding of the protection of the energy recovery system If it is thorough, the energy recovery system will be severely damaged when the zero-emission system is running. The energy recovery system accounts for a relatively high investment cost in the system. If it is damaged, it will be a great loss to the engineering company and its end users