Production of 700 C Steam

[AD_1979]

Dear all,

Due to an application we need to organize in one of our facilities, we need to deal with the production of a quantity of around 500 kg/h of a really high temperature steam (Around 700 C). Is there any way of doing this? I can get steam up to 450 C....but I cannot find any alternative / technology for getting this extra boost of temperature.

Your help is really appreciated.

Regards,
AD

 

[goutam_freelance]

Yes, this may be possible. The main constraint is temperature resistant material.

ASME codes allow temperatures up to 1200 deg F(649 deg C) for code approved piping material. However, advanced ultra supercritical power plant technology will achieve up to 700 deg C steam temperature. However, special approval from ASME be required for using these materials.

 

[georgeverghese]

700degC at what pressure ?

 

[AD_1979]

700degC at what pressure ?

Around 2 bar.g

For such low pressures, I saw that there are some systems able to produce steam at such temperature, but the problem is they are electrically driven. I am trying to find some technology driven directly by heat produced by fuel and residual heat in our process.

 

[georgeverghese]

Exhaust gas from the radiant section of a typical fired heater is > 800degC , so 700degC superheated steam should be possible. Speak to some fired heater manufacturers in your area and see if they can make something for this low 500kg/hr steam rate. It may be much more expensive than an electrical heater element driven superheater, so see if this increased cost can be recovered in say 5years or so with the cheaper fuel source you have available.

 

[AD_1979]

Exhaust gas from the radiant section of a typical fired heater is > 800degC , so 700degC superheated steam should be possible. Speak to some fired heater manufacturers in your area and see if they can make something for this low 500kg/hr steam rate. It may be much more expensive than an electrical heater element driven superheater, so see if this increased cost can be recovered in say 5years or so with the cheaper fuel source you have available.

Thanks for your help hear, George.

I'm not sure if you could be familiar with such type of manufacturers in the Benelux region, which is where I'm currently working. Help is highly appreciated here.

Regards,
AD

 

[arianaa]

Thanks for your help hear, George.

I'm not sure if you could be familiar with such type of manufacturers in the Benelux region, which is where I'm currently working. Help is highly appreciated here.

Regards,
AD

To achieve steam at around 700°C and maintain a flow of 500 kg/h, you can consider advanced techniques typically used in high-temperature industrial applications. One approach is using specialized superheaters that can further heat steam generated at lower temperatures. These superheaters use materials and designs that withstand extreme conditions to boost steam temperature beyond the usual limits.

Additionally, exploring combustion-based methods that involve high-temperature burners can help achieve the desired steam temperature. Custom engineering solutions, such as integrating advanced heat exchangers or utilizing gas-fired superheaters, might also be viable.

 

[crshears]

Depending on which energy sources are available, might a steam compressor be of use? I haven't checked the thermodynamics or anything, I'm just asking the question; my first employer out of college used one, although not with steam anywhere near 700° C . . .

That notwithstanding, and depending on volume required, a steam compressor might provide some of the enthalpic input at the lower end of the temp increase, reducing the energy consumption of any electric heaters used to attain final temperature.

 

[georgeverghese]

See if there is a Babcock - Wilcox representative somewhere near you

https://www.babcock.com/home/thermal/steam-generators/utility-scale-boilers/

 

[AD_1979]

See if there is a Babcock - Wilcox representative somewhere near you

https://www.babcock.com/home/thermal/steam-generators/utility-scale-boilers/

I'm pretty sure Babcock has to have representatives here, both in Rotterdam and Antwerp. I will investigate this and I would also check if other alternatives not involving steam (for instance, use of thermal oil) can be practical for the application my colleagues are thinking.

BR,
AD

 

[pierreick]

Hi,
Can you check with these guys? Ask them to direct you to someone able to support your query (500 kg/h, 700C 2 Barg) as an alternative.

ABR-K / Superheated Steam Boiler (300-10000 kg/h)

www.aralsan.com

My 2 cents
Pierre

 

[AD_1979]

Hi,
Can you check with these guys? Ask them to direct you to someone able to support your query (500 kg/h, 700C 2 Barg) as an alternative.

ABR-K / Superheated Steam Boiler (300-10000 kg/h)

www.aralsan.com

My 2 cents
Pierre

Thanks Pierre. It seems it is a bit on the low side, concerning temperature. But I will check out with them to see what can be done.

BR,
AD

 

[AD_1979]

Update:

I just got a budget quote from a Chinese vendor which, in principle, seems to be able to deliver this type of vapor. But I only get a couple of numbers and a price for the system, so I'm not really sure if this will work.

 

[pierreick]

Hi,
Share with us the details of the offer, we may be able to comment.
Pierre

 

[AD_1979]

Hi,
Share with us the details of the offer, we may be able to comment.
Pierre

This is roughly the only info I got. Assuming we need to supply 500 kg/h, theoretically speaking we are talking that you would need at least 165 KW of energy to do this....so this seems to be strange. But I only did a really rough calculation with enthalpies and I'm not -by any means- an expert on this. Your thoughts are welcome.

 

[goutam_freelance]

I think 500 kW heating specified capacity is in order considering some heating losses.

 

[pierreick]

Hi,

Calculator: Superheated Steam Table | TLV - A Steam Specialist Company (Worldwide)

Online calculator with Superheated Steam Table. Includes 53 different calculations. Equations displayed for easy reference.

toolbox.tlv.com

Goutam,
I'm confused with the enthalpy of the inlet ! Unless it's a liquid.
I was expecting some detail about the supplier ( Name, Location).

Pierre

 

[AD_1979]

Hi,

Calculator: Superheated Steam Table | TLV - A Steam Specialist Company (Worldwide)

Online calculator with Superheated Steam Table. Includes 53 different calculations. Equations displayed for easy reference.

toolbox.tlv.com

Goutam,
I'm confused with the enthalpy of the inlet ! Unless it's a liquid.
I was expecting some detail about the supplier ( Name, Location).

Pierre

The company is called Sinoheater: www.sinoheater.com
They are located in Jiangsu. I have no previous references of this organization.

 

[AD_1979]

View attachment 1903

I think 500 kW heating specified capacity is in order considering some heating losses.

One question about this Goutam:

It seems to me that you are considering the fluid coming as water originally? (Hence the liquid enthalpy)
In principle we have mid pressure steam available as our preliminary source.

Another comment about this: while it seems theoretically possible (in terms of energy and thermodynamics)...I am still not able to get any other source, besides of this Chinese vendor. I am a bit puzzled about this fact.

BR,
AD

 

[pierreick]

The company is called Sinoheater: www.sinoheater.com
They are located in Jiangsu. I have no previous references of this organization.

I have been working in China for 10 years, in Jiangsu Province, Zhenjiang & Wuxi. I will have a check with colleagues over there.
I understand that the heating source is electricity. very compact unit.
This explains the efficiency, Power required 500 KW for a theorical close to 170 KW.
Pierre