A common space for general questions, suggestions and discussions that do not fit other forums.

#1 General Discussion Comments Available

Is it a good practice that we are taking LP heater-4 outlet initial flushing line water  tappin...

Is it a good practice that we are taking LP heater-4 outlet initial flushing line water  tapping for boiler filling for initial cold startup from other unit? LPHeater-4 outlet temperature will be 140 degC.Please comment on thermal stress or any other issue.It is a 300MW coal fire...

Posted by: Abhishek Nayak Category: Industry Member Organisation: JSW Date: Mar 31, 2021 Comments: 1 Ratings: 0

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#2 General Discussion Open for Response

One of the power unit of 660 MW, Flat strips for water wall welding of material grade SA 387 Gr...

One of the power unit of 660 MW, Flat strips for water wall welding of material grade SA 387 Grade 12 cl-2 in under procurement process. Supplier produce test certificate but unable to furnish heat treatment chart. However declare that the material in furnace normalized at 930...

Posted by: Santosh Kumar Hiray Category: Industry Member Organisation: NTPC Date: Jun 13, 2020 Comments: 0 Ratings: 0

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#3 General Discussion Expert Responded Rated 7.5 / 10

Sir 1) As observed Silica increases  in Drum > 1.2ppm - owing to colloidal silica (  Given-F...

Sir 1) As observed Silica increases  in Drum > 1.2ppm - owing to colloidal silica (  Given-F.W. whose silica already < 0.02 ppm @ 105 KSC Drum Pressure), Considerable Blow down is given > 5%, it is below 0.02 ppm in MS. As the same F.W. is used in attemperation why silica in S...

Posted by: Mr. Amit Tyagi Category: Industry Member Organisation: GAIL India Ltd. Date: Nov 21, 2019 Comments: 1 Ratings: 2

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#4 General Discussion Expert Responded

Dear Sir As above 270 o C inside drum Colloidal Silica Converts to Reactive Silica (forming ...

Dear Sir As above 270 o C inside drum Colloidal Silica Converts to Reactive Silica (forming Silicic acid) which are weakly ionised & as observed from chemical lab reports have nearly no effect/impact on Drum -Conductivity or pH it abruptly increases Drum Silica only. As per di...

Posted by: Mr. Amit Tyagi Category: Industry Member Organisation: GAIL India Ltd. Date: Nov 07, 2019 Comments: 1 Ratings: 0

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#5 General Discussion Expert Responded

Dear Sir  Adding alum  to promote coagulation & forming floppy flocs (during Clarification i...

Dear Sir  Adding alum  to promote coagulation & forming floppy flocs (during Clarification in RWP) i.e. (Al2SO4) 3+ 6H20  -->  Al (OH) 3 + 3H2SO4 leads to formation of Surface positive & insoluble hydroxide as Al(OH)3 which attracts Suspended(> 1micron) & Colloidal impurities...

Posted by: Mr. Amit Tyagi Category: Industry Member Organisation: GAIL India Ltd. Date: Nov 07, 2019 Comments: 1 Ratings: 0

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#6 General Discussion Expert Responded Rated 7.0 / 10

Fly Ash Wet Handling and its transportation: CaO + Water = > Heat and Violent Steaming: How to...

Fly Ash Wet Handling and its transportation: CaO + Water = > Heat and Violent Steaming: How to control? CFBC Boiler: Type IR / U Beam: Lime Dosing for SOx capture:  Excess Lime in Fly ash (CaO) reacts with water and give exothermic reaction which makes violent Steaming and...

Posted by: Tejas Category: Industry Member Organisation: RIL Date: Jul 31, 2019 Comments: 1 Ratings: 1

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