4 replies to this topic

[ashetty]

Hello all,

There is a LP Steam line connection to the reaction furnace burner of our SRU unit (along with the acid gas,process gas & combustion air lines).
The P&ID note for thr steam line is as folows "moderating steam used during hot standby of reaction furnace burner".

I would like to know the function of the steam line as the P&ID note & specifically the term "moderating steam" is not clear to me.

Best Regards

[daryon]

Hello all,

There is a LP Steam line connection to the reaction furnace burner of our SRU unit (along with the acid gas,process gas & combustion air lines).
The P&ID note for thr steam line is as folows "moderating steam used during hot standby of reaction furnace burner".

I would like to know the function of the steam line as the P&ID note & specifically the term "moderating steam" is not clear to me.

Best Regards

Hi ashetty,
I not certain, but my first thought was that it may be used like steam injection for a flare tip. Primarily injecting steam helps create smokeless combustion by entraining air and creating turbulence. But I think it also reduces the radiation levels at grade by lowering the emissivity of the burner flame. They maybe injecting steam to reduce radiation levels when trying to "moderate" the furance temperature during standby.

[ashetty]

Hi daryon,

I`m actually updating the cause & effect charts for some new equipment/lines added in our unit.Not an easy task for me considering
I have limited experience with burners, but your explanation sounds logical and i`ll start investigating in that direction.

Best regards

[hpe]

Hi daryon,

I`m actually updating the cause & effect charts for some new equipment/lines added in our unit.Not an easy task for me considering
I have limited experience with burners, but your explanation sounds logical and i`ll start investigating in that direction.

Best regards

Hi ashetty
Lp steam to air & acid gas chambers used for sudden s/d in sulphur plant to protect this cchambers from back heating of combustion chamber.it use also when combustion chamber is higher than 400 C and there is no flow of air & acid gas when startup burner is on service.you know that it's recommend not use carbon steel over 400C .
GOOD LUCK

[Pronab]

During start-up of a SRU, it is very important to maintain proper air: acid gas ratio(which is 2:1 in the tail gas of H2S: SO2, more sepcific: final claus reactor outlet). To avoid temperature soot-up in a reaction furnace during start-up / SD ,LP Steam line is provided. Mainly it is using to control temperature and also to maintain a good flame color, as in a SRU acid gas is burn in a deefficiency of air. When reaction furnace temperature is low( less than LP Steam temperature)N2 is is used and when it is more LP steam is used as it is cheap to produce. We call this type of steam as Tempering Steam.
Is it a CBA process or 3 stage claus process.

Regards.