Welcome to the steam & power forum, a bulletin board dedicated to power & heating plants, boilers, turbines, steam, HTHW, pressure vessels, HRSG, piping and condensate, combustion including ASME questions and more. http://www.steamforum.com 9/6/2010 9:45:22 AM http://www.steamforum.com/images/poppy_clear.gif http://www.steamforum.com Steam & Power Forum RSS 64 150 Condensing turbine has a higher efficiency because the work done is more for the same input. http://www.steamforum.com/steamforum_tree.asp?master=13725 Mon, 6 Sep 2010 00:01:00 -0300 Condensing turbine has a higher efficiency because the work done is more for the same input. http://www.steamforum.com/steamforum_tree.asp?master=13728 Sun, 5 Sep 2010 23:59:00 -0300 Babcock &amp; Wilcox is the OEM for Multiclone dust collectors part of purchase of Western Percip from Joy and should be able to assist. Feel free to contact Chris McKeown at 484 885-0696 as he is the Multiclone product manager at B&amp;W. http://www.steamforum.com/steamforum_tree.asp?master=13714 Sun, 5 Sep 2010 21:22:00 -0300 You appear to be in Argentina and I am in Australia on holidays away from normal phone and can only use cellphone.<br />Email is not much different to this forum.<br />I would prefer to stay in the forum for the benefit of others who may learn or contribute.<br />If you still want to use Email reply with your further questions or comments and add your Email address so I can contact you. http://www.steamforum.com/steamforum_tree.asp?master=13722 Fri, 3 Sep 2010 22:05:00 -0300 Jim, <br /><br />Thank you very much for your answer. I was wondering if theres a more direct way to reach you so we could discuss a bit more this subject. Maybe an e-mail address or phone number perhaps where I could find you?<br /><br />Thanks again, <br /><br />Gerardo. http://www.steamforum.com/steamforum_tree.asp?master=13722 Fri, 3 Sep 2010 07:21:00 -0300 when bleed steam is used how does it affect thermal efficiency http://www.steamforum.com/steamforum_tree.asp?master=13728 Thu, 2 Sep 2010 16:00:00 -0300 what is the heating value of coal 85% carbon 5% hydrogen 5% ox 1% sulpher 4% nitrogen I know you use dulongs formula 14000c+62000 h-0/8+4000s but now what do i do?any help is greatly appreciated.thanks john http://www.steamforum.com/steamforum_tree.asp?master=13727 Thu, 2 Sep 2010 15:41:00 -0300 what is more important on a reaction turbine radial or axial clearance http://www.steamforum.com/steamforum_tree.asp?master=13726 Thu, 2 Sep 2010 13:25:00 -0300 what is the difference in thermal efficiency of a condensing turbine and a non condensing turbine and why http://www.steamforum.com/steamforum_tree.asp?master=13725 Thu, 2 Sep 2010 13:23:00 -0300 how can we controll throttle loses in a turbine http://www.steamforum.com/steamforum_tree.asp?master=13724 Thu, 2 Sep 2010 13:20:00 -0300 Do not try to correct this by cleaning the superheater.<br />Silica is volatile and the ratio of silica in steam to silica in water is subject to boiler water temperature &amp; PH.<br />The standard boiler water treatment limits for silica in boiler water are set to keep the steam content less than 0.02ppm.<br />My initial thought is that your contract is wrong and everything else is OK.<br />However if the Turbine manufacturer has specified a lower figure this would require action.<br />The only way to get the silica in steam lower than 0.02 is to reduce the silica in the boiler water by increasing blowdown and maintaining the boiler water concentration lower.<br />If you have a supercritical boiler you will have to correct the silica in condensate polishers.<br /> http://www.steamforum.com/steamforum_tree.asp?master=13722 Wed, 1 Sep 2010 23:40:00 -0300 Hello everybody, <br /><br />Here in our Cogeneration units are having some issues with the content of silica in our steam produced more than 0,015 ppm, because of contract terms, it should be lwer than that. Maybe you could share your experience on this subject. <br />I just want to ask if any of you ever had this problem and how did you solve it? We are thinking on doing a post-operational chemical cleaning on the superheater of the HRSG. The chemical treatmen of the water has alwaays been the same. <br /><br />Has anyone had this problem and how did you solve it? Have you ever tried to do only a chemical cleaning on the Superheater?<br /><br />Thenks for your help.<br /><br />Gerardo http://www.steamforum.com/steamforum_tree.asp?master=13722 Wed, 1 Sep 2010 15:18:00 -0300 suresh,<br />could you post the arrangement drawing which shows the duct from last heat transfer equipment air heater to chimney? it will be more helpful to analyse the root cause of ash settling on duct. http://www.steamforum.com/steamforum_tree.asp?master=13616 Wed, 1 Sep 2010 11:36:00 -0300 It is my understanding that if you went onto a steam driven ship and asked to see the guardian valve, you would be taken without hesitation to the guardian valve which ensures steam does not flow to the astern blading on the propulsion turbine while forward power is in use.<br />If you went into a power plant and asked you would likely get blank looks.<br /><br />Is it your experience that more than one valve on a ship is called the guardian valve?<br /> http://www.steamforum.com/steamforum_tree.asp?master=13709 Fri, 27 Aug 2010 11:23:00 -0300 I would think that you probably are not going to get a better instrument than from Bindicator themselves. I would be considering a sonic vibrator to move the caking fly ash off the probe. But that is probably not doable for your situation because you probably already thought about it. http://www.steamforum.com/steamforum_tree.asp?master=13714 Wed, 25 Aug 2010 13:32:00 -0300 Ill take a shot at it. Your older style governors were commonly woodward centrifugal flywheel style governors. Your electro-hydraulic style governors have a hydraulic oil reservoir and pump high pressure hydraulic fluid to a servo controlled piston linked to the turbine steam inlets. The electro portion merely refers to the control signal transmitted and received as feedback to the servo. <br /> I hope this can shed some light. http://www.steamforum.com/steamforum_tree.asp?master=13667 Tue, 24 Aug 2010 16:47:00 -0300 Your definition is entirely correct. I havent heard the terms since my old Navy days and that is exactly how theyre used. http://www.steamforum.com/steamforum_tree.asp?master=13709 Tue, 24 Aug 2010 14:49:00 -0300 My plant is operating an internal recirculation B&amp;W 360KPPH CFB boiler, burning Powder River Basin coal. The internal recirculation is referring to the collection of ash in a multi-cyclone separator area where it is collected in hoppers and circulated back to the furnace shaft to control upper furnace material inventory.<br /> The issue we have been having is in the reliability of these hopper bindicators. The ash is extremely fluid and there is a certain amount of moisture to it attributed to our ammonia injection system for NOx control. The ash seems to cake the probes and at that point they become unreliable. If the level of the hoppers gets too high the ash plugs the inlet nozzles and this then requires a shutdown of the entire plant to unplug them.<br /> The specs on the probes are Bindicator VRF-1000. VRF referring to variable radio frequency. rated to 1000 degrees F.<br />Cutting to the chase, Is there some other instrument we can use in this application? <br /> Thank you for any responses. I will provide any further information as necessary.<br /> http://www.steamforum.com/steamforum_tree.asp?master=13714 Tue, 24 Aug 2010 14:45:00 -0300 I had heard of this Guardian Valves once before in power plants and my understanding is it defines a second valve as a guard. It is an awkward term in a steam plant.<br /><br />Uses -<br /><br />2 steam stops in one line off the boiler<br />2 natural gas line block valves<br />2 FO block valves<br />2 Bottom blow valves http://www.steamforum.com/steamforum_tree.asp?master=13709 Tue, 24 Aug 2010 14:13:00 -0300 Dear all, thanks very much. The information are very useful.<br /><br />Roger http://www.steamforum.com/steamforum_tree.asp?master=13707 Tue, 24 Aug 2010 12:11:00 -0300