Add Products to the Cart to Obtain Instant Discounts!
January 23, 2017 0 Comments
replacing it with fresh makeup water with lower levels of TDS, thereby lowering the overall TDS in the boiler.
Typical Installation (See timed‐sampling drawing)
A. Required components
Conductivity probe and mounting cross should be installed as close to the skimmer port as possible in a 1” fully ported line with no bends or restrictions. An isolation valve should be installed upstream of the conductivity probe for ease of probe removal and maintenance.
2) A flush valve (1/4 turn ball valve) should be installed on the bottom leg of the 1” mounting cross for sediment removal and probe cleaning.
3) The throttling valve should be installed between 6” and 3’ downstream of the conductivity probe to prevent steam flashing across the probe.
4) The blowdown valve should be located far enough downstream of the throttling valve to distance it from high temperature areas. Many blowdown valves feature thermal cutoff switches that can be triggered by high ambient temperatures.
Automated Blowdown Cost Justification
hat is the most common “objection” to the purchase of an automatic boiler blowdown system?
Right, it costs too much! Here’s a suggestion to help overcome that objection. Analyze the operation and come up with the payback figure.
Take the following example:
A process boiler producing 100,000 pounds per hour of steam: The operator has been told to maintain chlorides at 18‐22 ppm. His records show that he averages 20 ppm, which is pretty good for manual blowdown.
However, automatic blowdown could bring the average up to 21 ppm without exceeding 22. This would reduce the blowdown by 5% (21‐20) / 20 = .05 or 5%
Typically, 20 ppm results from 10 cycles of concentration. The blowdown required to maintain 10 cycles is 10,000 lbs/hr (100,000 / 10 = 10,000)
If the 10,000 lbs/hr is reduced by 5%, that’s a savings of 500 lbs/hr. 500 lbs/hr at 400 BTU/lb is 200,000 BTU/hr. A gallon of oil is about 100,000 BTU, so the oil consumption will reduce by 2 gal/hr. At a dollar a gallon, that’s a $2 savings every hour!
If an automatic blowdown system costs $1300, it will take 650 hours (or 27 days) to pay for the system!!! ($1300 / $2 per hr = 650 hours); (650 hours / 24 = 27 days)
This was all based on zero condensate return. If there is 50% return, the payback period doubles in 54 days. That’s still a very short payback period. Of course, the savings continue after the payback period.
April 28, 2021 0 Comments
Most people have heard of ozone thanks to media coverage about pollution and the ozone layer. But for many, that is where their knowledge ends. The first thing you should tell a homeowner is that ozone is nothing more than O3—three oxygen atoms bound together.
That extra oxygen atom wants to hook up with other material, like unwanted microorganisms in water filtration systems. For the purpose of disinfecting water, ozone comes in contact with contaminants and pathogens that can damage equipment and get in the water supply. The extra oxygen atom oxidizes the contaminant and the O3 becomes O2—just plain old oxygen.
April 28, 2021 0 Comments
It was shown that after 30 seconds of in vitro direct exposure to ozone, 99 percent of the viruses are inactivated. Although this evidence is of considerable importance, outside of the laboratory models, there are various parameters that influence the time required to obtain the same result. First of all, it was seen that the inactivation of 99% of viruses by ozonation requires its spread at concentrations higher than those necessary for the bacteria. A longer exposure time, about 30 minutes, is necessary for the treatment of the surfaces of the environment (surface viruses), while for any viral particles suspended in the air (airborne viruses) 8-10 minutes are enough to remove 99.9% of them. Viruses in water are more susceptible to ozone inactivation and short contact time, about 1 min or little more, are sufficient to inactivate 99% of them.
April 27, 2021 0 Comments
A positive displacement pump moves a fluid by repeatedly enclosing a fixed volume, with the aid of seals or valves, and moving it mechanically through the system. The pumping action is cyclic and can be driven by pistons, screws, gears, lobes, diaphragms or vanes. There are two main types: reciprocating and rotary.Positive displacement pumps are preferred for applications involving highly viscous fluids such as thick oils and slurries, especially at high pressures, for complex feeds such as emulsions, foodstuffs or biological fluids, and also when accurate dosing is required.