Some Troubleshooting Notes

This section covers some examples and notes on common but unrelated problems, all of which rely in part on the effective observation of boiler plant operating conditions and the interpretation of daily water analysis log sheets. 

1 Managing High Sludge Problems in Lower Pressure Boilers 

Where carbonate conditioning programs are employed, it should be noted that, apart from high sludge volumes, C02 also results from the added sodium carbonate and the alkaline earth FW contaminants, as shown here  

The production of carbon dioxide in turn produces a low pH in the condensate system, requiring additional neutralizing amine to compensate. 

It is difficult to manage the problem of high sludge production in lower pressure boilers where precipitation programs, especially carbonate conditioning, are used because it has a knock-on effect resulting in condensate line corrosion. The answer is always to install a water softener. The payback time is very short because of the reduced BD necessary as a result of decreased sludge production. 

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When analyzing an immunostained specimen, deposits of the colored chromogen indicate the presence of the antigen and represent specific positive staining. The pattern of staining in the cells can be cytoplasmic, nuclear, membranous, or surface focal or diffuse. This section addresses some of the most common problems encountered in immunoperoxidase procedures and the appropriate solutions to correct them (see Chapters 23-25). (See Note 4 for additional troubleshooting resources.)... 

Install the PhyME software by following instructions in the distribution s README file, at some location hereafter referred to as ROOT. (See Notes 1-3 for troubleshooting and special options.)... 

This section addresses some of the most common problems encountered in immunoperoxidase procedures and the appropriate solutions to correct them. Note that we address manual immunohistochemical staining methods only see appropriate operator s manual for troubleshooting of automated immunostainers. 

It should be noted that not all changes have an immediate effect on the process. In some cases, there can be a considerable incubation time before the effects of a change become noticeable. This, of course, complicates the troubleshooting process it is important to keep this in mind and not jump to conclusions. The author experienced a case where a disastrous wear problem was related to an event that took place four months earlier. The wear remained insignificant until about four months after a new feed housing was installed. However, when the rapid wear started, the screw was destroyed within a time period of only 48 hours. 

Note Table 15-1 shows only some of the more common chain problems and possible causes and cures. It is only a general guide for troubleshooting. The user should always consult the chain manufacturer when a chain fails. 

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