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反渗透设备系统的故障分析与故障排除措施

文章来源:东北亚水网 作者:水处理设备维修 时间:2010-08-08 09:32:42

反渗透设备系统的故障分析与故障排除措施

 反渗透设备

一、反渗透设备系统的故障分析:沈阳反渗透纯净水设备安装,沈阳反渗透纯净水设备方案设计,沈阳反渗透系统清洗

反渗透系统中最常见的问题是脱盐率的下降和产品水量的降低,如果二者或其中之一缓慢地降低,则可能是污垢或水垢产生的常见现象,可以通过适当的清洗来解决问题;而突然或快速的性能下降,则表明处理系统出了问题或操作失当。发生了问题,需要尽早解决,延误时机会导致反渗透膜无法恢复原有的性能。

及时发现问题的先决条件是保存相应的记录。当发现系统脱盐率和产水量下降时,首先应该校正仪表,以避免因仪表原因而误判。这些仪表包括电导率表、流量表、压力表、温度表等。其次,要对记录的运行数据进行“标准化”。因温度、进水TDS、回收率、使用年限和水通量等发生变化,都会引起脱盐率和产水量的变化。通过计算得到标准化的产水量和脱盐率,然后与初始的运行数据进行比较,确认系统有无故障。

 反渗透系统的故障现象主要有三类:透水量减少、盐透过率增大(脱盐率下降)以及压降增大,但造成这些故障的原因很多,应尽量从这些故障现象中找出问题的实质,从而尽快实施检修和维持等对策。

二、反渗透系统故障排除的主要措施

1.核实仪表操作沈阳反渗透纯净水设备安装,沈阳反渗透纯净水设备方案设计,沈阳反渗透系统清洗

包括压力表、流量计、pH计、电导率计、温度计等,必要时重新校正。

2.重新检查操作数据

检验操作记录、通量及脱盐率的变化,考虑温度、压力、给水浓度、膜的年龄等对产量和脱盐率的影响。

3.评估可能的机械和化学问题

机械问题主要是O形圈的损坏、盐水密封的损坏、泵的损坏、管道和阀门的损坏、不精确的仪表等。化学问题一是酸添加的不适当,高剂量的酸会损坏膜或引起基于硫酸盐的结垢(若使用硫酸),低剂量会导致碳酸盐或基于金属氢氧化物的垢或污染;二是阻垢剂添加的不适当,高剂量可能导致污染,低剂量可能导致结垢。

4.分析进料水化学条件的变化

将现行的进料水分析和设计时的基准数据相比较,进料水化学条件的变化会产生增添预处理或更新原有预处理设备的需求。

5.鉴定污染物

一是分析进料液、盐水和产品液的无机成分,总有机碳(TOC)、浊度、pH值、TDS、总悬浮固体(TSS)、SDI和温度,其中SDI、TSS和浊度的测定能提供微粒物质污染的依据,TOC的测定可预示有机物的污染倾向;二是浸渍和分析进料液筒过滤器(优先采用的方法)或SDI过滤器滤垫。

6.选择合适的清洗方案沈阳反渗透纯净水设备安装,沈阳反渗透纯净水设备方案设计,沈阳反渗透系统清洗

    在清洗方案的选择中,应考虑以下因素:膜的类型和清洗剂选择的相容性,清洗设备的需求,系统的结构材料,污染物的鉴定等。


Reverse osmosis device fault analysis and troubleshooting measures -- ro pure water equipment - reverse osmosis water treatment equipment - ro pure water machine - reverse osmosis ultra-pure water equipment

A, ro device system failure analysis

In reverse osmosis system is the most common problems of desalination rate and reduce, if the product quantity one or two slowly decrease may be dirt or scale of common phenomenon, through proper cleaning to solve the problem, And suddenly, or the performance, fast processing system that is wrong or improper operation. The problem, as happened to solve, delay when opportunity to reverse osmosis membrane can restore the original properties.

That question is to keep the prerequisite of the corresponding record. When discovery system desalination rate and produce a water yield drops, should first calibration instrument, in order to avoid for instrument reason and misjudgment. These instruments including conductivity, flow and pressure gauge, etc. Secondly, to record the data of "standardization". Due to temperature, water TDS, recovery, use fixed number of year and water flux, etc, and can cause changes desalination rate and produce a water yield changes. Through the calculation of standardizing desalination rate, then produce a water yield and to compare the initial operation data, confirm system has trouble-free.

Reverse osmosis system, there are three major fault phenomena, salt water, through rate increases (down) desalination rate and the pressure drop, but the fault reasons of many, should try to find out from the fault phenomena, and essence of the overhaul and maintenance etc as soon as possible.

Second, the reverse osmosis system is the main measures for troubleshooting

1 check instrument operation

Including the pressure gauge, flowmeter, pH, conductivity meter, thermometer, necessary to correction.

2. Review operating data

Inspection records, flux and desalination rate changes, considering the temperature, pressure, water concentration and membrane on the age of desalination rate and yield.

3 evaluation of mechanical and chemical problems may

Mechanical problem basically is the o-ring damage, brine sealing damages, pump damage, piping and valves damage, not accurate instrument, etc. A chemical problem is not appropriate, adding acid high dose of acid can damage caused by or on the membrane fouling sulphate (if used), low doses of sulphuric acid in carbonate or on the scale of metal hydroxide or pollution, Two is adding inhibitor of high dose not appropriate, may cause pollution, low dose may cause fouling.

Feed water and chemical analysis of the condition

Will the incoming water analysis and design of baseline data comparison, feeding water chemical changes in the conditions will add pretreatment or update the original pretreatment devices demand.

5 appraisal pollutants

One is analyzed, and the products material of inorganic salt, total organic carbon (TOC), turbidity, pH value and TDS, total suspended solid (TSS), and the temperature, including SDI SDI, TSS turbidity and determination of the material contamination particles can provide the basis for TOC, determination of organic pollution tendency can predict, 2 is dipping and analysis of feed liquid filter (priority methods) or SDI filter pad.

6 choose appropriate cleaning solution

In the choice of cleaning solution, should consider the following factors: the membrane type and cleaning, cleaning equipment, choose the compatibility of the needs of system structure, material, the identification of pollutants.

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