mash tun 1.5 bbl problem

[jerryblack]

Hello friends

I'm building a stainless steel mash tun 1.5 bbl of 22 "wide and 47" high. I wanted to know if I'm going to have problems with the mash because it is narrow and how can i solve the problem?

Thank you

 

[orangehero]

It is recommend that the loading on false bottom be:
Dry milled grist: 160-175 kg/m2 (32.8-35.8 lb/ft2)
Conditioned and milled grist: 170-210 kg/m2 (34.8-43.0 lb/ft2)
Steep-conditioned and milled grist: 200-310 kg/m2 (41.0-63.5 lb/ft2)

By my calculations thats 94.5 lbs of dry milled grist over a 22" diameter false bottom.

You may have problems with getting good flow through the mash filter bed.

 

[GreenMonti]

It is recommend that the loading on false bottom be:
Dry milled grist: 160-175 kg/m2 (32.8-35.8 lb/ft2)
Conditioned and milled grist: 170-210 kg/m2 (34.8-43.0 lb/ft2)
Steep-conditioned and milled grist: 200-310 kg/m2 (41.0-63.5 lb/ft2)

By my calculations thats 94.5 lbs of dry milled grist over a 22" diameter false bottom.

You may have problems with getting good flow through the mash filter bed.

So, I've been out off the boards for some time now. Where did this info come from?
How would that fall on my small 5 gallon batch setup of which I have my most narrow mash tun yet with a 9" bottom?

 

[orangehero]

Brewing Science by Briggs, et al.

Looks like you can do 15.8 lbs of dry milled grain by their recommendations. I assume they are talking about a wedge wire false bottom. The perforated stainless ones may work differently.

 

[dmcman73]

It is recommend that the loading on false bottom be:
Dry milled grist: 160-175 kg/m2 (32.8-35.8 lb/ft2)
Conditioned and milled grist: 170-210 kg/m2 (34.8-43.0 lb/ft2)
Steep-conditioned and milled grist: 200-310 kg/m2 (41.0-63.5 lb/ft2)

By my calculations thats 94.5 lbs of dry milled grist over a 22" diameter false bottom.

You may have problems with getting good flow through the mash filter bed.

He could probably mix in a good portion of rice hulls to get the flow going.

 

[GreenMonti]

Brewing Science by Briggs, et al.

Looks like you can do 15.8 lbs of dry milled grain by their recommendations. I assume they are talking about a wedge wire false bottom. The perforated stainless ones may work differently.

Thank you.

Good thing I like, and have stuck with 5 gallon batches. My bottom is perforated stainless. I've gotta say though, this new tun is the best as far as efficiency goes. For my system and prior systems I've had in the past.

 

[froot]

Brewing Science by Briggs, et al.

Looks like you can do 15.8 lbs of dry milled grain by their recommendations. I assume they are talking about a wedge wire false bottom. The perforated stainless ones may work differently.

I think you misplaced a decimal point there mate. 15.8 lbs done easily on a 12" fb.

 

[orangehero]

I think you misplaced a decimal point there mate. 15.8 lbs done easily on a 12" fb.

He indicated that has a 9" false bottom.

28.1 lb would be the recommended value for dry milled grist on a 12" false bottom.

Keep in mind these are recommendations for commercial lauter tun design that I would assume are supposed to optimize run off rate and efficiency.

 

[jddevinn]

It is recommend that the loading on false bottom be:
Dry milled grist: 160-175 kg/m2 (32.8-35.8 lb/ft2)
Conditioned and milled grist: 170-210 kg/m2 (34.8-43.0 lb/ft2)
Steep-conditioned and milled grist: 200-310 kg/m2 (41.0-63.5 lb/ft2)

By my calculations thats 94.5 lbs of dry milled grist over a 22" diameter false bottom.

You may have problems with getting good flow through the mash filter bed.

Brewing Science by Briggs, et al.

Looks like you can do 15.8 lbs of dry milled grain by their recommendations. I assume they are talking about a wedge wire false bottom. The perforated stainless ones may work differently.

The same source (talking about large commercial operations, like attached image) also says The depth of the mash is typically 3-5ft, but depths of up to 9ft have been used.

I think this is going to be more dependent on your false bottom design. I have a Blichmann false bottom and have never had any sort of stuck sparge issues, but see them brought up on these boards a lot. I think you'll just have to try and see, if you have issues add rice hulls or change the false bottom design