Boilers
Cameron Raszler
Author
01/29/2021
Added
35
Plays
Description
Top IAC Recommendation Series: Boilers
Searchable Transcript
Toggle between list and paragraph view.
- [00:00:07.060]The purpose of a boiler is to heat feedwater
- [00:00:09.720]and turn it into steam.
- [00:00:11.380]Steam can then be used to run equipment,
- [00:00:13.780]transfer heat to other processes,
- [00:00:15.990]or perform additional tasks.
- [00:00:18.200]In the transfer of this steam through the steam network,
- [00:00:20.830]there are often leaks that develop,
- [00:00:22.350]which should be fixed promptly to minimize wasted energy.
- [00:00:25.980]The National IAC Database lists an average annual savings
- [00:00:29.580]of $29,500 for repairing steam leaks.
- [00:00:33.970]Steam traps provide a way to drain condensate
- [00:00:36.370]after steam has lost its energy and become water.
- [00:00:39.550]When working properly,
- [00:00:41.020]they prevent steam from exiting the system,
- [00:00:43.110]which saves money by preventing waste of this resource.
- [00:00:46.320]If steam shops have not been properly
- [00:00:48.090]inspected and maintained,
- [00:00:49.630]steam can leak into the condensate return lines.
- [00:00:52.640]The frequency at which steam traps should be inspected
- [00:00:55.220]depends on the pressure in the system.
- [00:00:57.060]For high pressure systems with 150 PSIG or higher,
- [00:01:01.070]a weekly to monthly inspection is suggested.
- [00:01:03.830]For medium pressure systems, ranging from 30 to 150 PSIG,
- [00:01:08.230]inspections should be monthly to quarterly.
- [00:01:10.700]For systems with low pressures, under 30 PSIG,
- [00:01:14.010]annual inspections are sufficient.
- [00:01:15.890]Some food processing facilities may utilize a boiler
- [00:01:19.430]to produce hot water instead of steam.
- [00:01:22.090]In these cases,
- [00:01:23.200]the recommendation to repair steam leaks doesn't apply.
- [00:01:26.110]The following recommendations are applicable for facilities
- [00:01:29.210]that use a boiler for either of these purposes.
- [00:01:32.280]As a boiler operates,
- [00:01:33.670]it produces hot gas that is expelled through a waste stack.
- [00:01:37.810]This gas can be used to preheat feedwater
- [00:01:40.350]through the use of an economizer.
- [00:01:42.760]When the cold feed water is preheated,
- [00:01:44.720]less energy has to be used to heat it up and create steam.
- [00:01:48.520]Warmer feedwater also reduces
- [00:01:50.250]the thermal shock on the boiler,
- [00:01:51.770]which can cause stress to the system
- [00:01:53.450]and lead to deterioration over time.
- [00:01:56.310]Industrial assessment centers have recommended
- [00:01:58.620]that food processing facilities implement the use
- [00:02:01.120]of a boiler economizer 163 times
- [00:02:04.280]with an average savings of $31,500.
- [00:02:08.180]So how do you know if your facility
- [00:02:09.700]would benefit from adding an economizer?
- [00:02:12.720]If your boiler exceeds 100 boiler horsepower,
- [00:02:15.690]operates at a pressure of 75 PSIG or higher,
- [00:02:19.360]and is significantly loaded all year long,
- [00:02:21.700]it would be a great candidate to retrofit an economizer.
- [00:02:25.400]Before measuring the stack temperature,
- [00:02:27.400]make sure all other boiler improvements have been made.
- [00:02:30.360]Adding an economizer to an inefficient system
- [00:02:32.830]would only be partially beneficial.
- [00:02:35.160]Optimize the system first,
- [00:02:36.870]and then see if an economizer would be beneficial.
- [00:02:39.940]The third recommendation commonly made about boiler systems
- [00:02:43.010]is to analyze the flue gas for a proper air to fuel ratio.
- [00:02:47.030]This recommendation has an average annual savings
- [00:02:49.830]of $12,000.
- [00:02:52.380]Two to three percent of oxygen
- [00:02:53.960]with a small amount of combustibles
- [00:02:55.750]is the ideal conditions for most systems.
- [00:02:58.410]This measurement can be done through the use of
- [00:03:00.530]inexpensive gas-absorbing test kits.
- [00:03:03.990]More costly probes can be purchased
- [00:03:05.950]in the range of 500 to $1,000
- [00:03:08.430]and are owned by many vendors
- [00:03:09.960]and industrial assessment centers.
- [00:03:12.230]It is recommended that a facility purchase one of these
- [00:03:14.760]computer-based analyzers
- [00:03:16.260]if their annual fuel costs exceed $50,000.
- [00:03:19.760]Join us in the next video
- [00:03:20.950]to see the most common recommendations
- [00:03:23.050]food processors are given regarding electricity efficiency.
The screen size you are trying to search captions on is too small!
You can always jump over to MediaHub and check it out there.
Log in to post comments
Embed
Copy the following code into your page
HTML
<div style="padding-top: 56.25%; overflow: hidden; position:relative; -webkit-box-flex: 1; flex-grow: 1;">
<iframe
style="bottom: 0; left: 0; position: absolute; right: 0; top: 0; border: 0; height: 100%; width: 100%;"
src="https://mediahub.unl.edu/media/15437?format=iframe&autoplay=0"
title="Video Player: Boilers"
allowfullscreen
></iframe>
</div>
Comments
0 Comments