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Subject:
Biomass Boiler, Plate Heat Exchanger, Biogas Purification System
 
Content:
Sir,

We need to purchase biomass boiler, plate heat exchanger and biogas purification system. The specifications are as:

Biomass boiler:
Required boiler should be operated both wood logs and saw dust or paddy
Husk it is good if it can operate coal also. Required steam capacity is 2 tones per hour. Therefore proposed boiler should have facilities to feed saw dust automatically (conveyor) and manually feed wood and some time we will feed both together to full fill requirement without any specific ratio. Capacity should be 2tones per hour and our working pressure 6 bar and boiler should be operated more than 6bar pressure (please let me know if we purchase boiler maximum pressure 10 bar is there any efficiency loss because our requirement pressure is 6bar and boiler rated pressure 10 bar, should it be more closed to the required pressure? if there is efficiency loss please select suitable maximum pressure boiler which satisfied our working pressure 6bar at maximum efficiency, like to know, when operate boiler at half load is there
Large efficiency lass).

Please give quotation including all technical and economical details for each equipment boiler with id, fd fan control panel, mechanical dust collector, water softener, preheater and tank, air preheater, front feeding system, interconnecting ducting, chimney, steam header, all values and safety equipment, insurance and sea freight, boiler inspection and installation engineering cost and power consumption of equipment, recommended wood size, each fuel consumption rate, boiler size, weight, heat transfer area, steam temperature and sketch of the system after installation.

Plate heat exchanger:
And also we need to purchase plate heat exchanger to recovery heat from spent wash (release from bottom of the distillation column. That stream flow rate is 3.662 cubic meter per hour and can be fed into heat exchanger at 103 Celsius and there is no limitation for out let temperature). coconut toddy can be fed into heat exchanger at 27 Celsius and need to be increased over 87(87-90).coconut toddy flow rate is 4 cubic meter per hour. I assumed as major compounds in coconut toddy are water and alcohol 7.2% and assumed that spent wash is free from alcohol and normally behave as coconut toddy at 0%
alcohol (if you have actual details of properties of coconut toddy please get for calculation). It is good your heat exchanger 2-2 pass one and heat load is 270-275KW and according to my assumption physical properties of both streams given bellow.

Content : 984.8
Density (Kg/m3) : 4093.3
Heat Capacity, (j/Kg.k) : 0.00091
Viscosity (pa.s) : 0.577

Please include all technical details like number of plates, heat load, both streams out let temperature, weight, and drawing.

Biogas purification system:
We distill coconut toddy to produce alcohol sprit and produce biogas about 350
cubic meters at 1495 N/m2 (0.014bar) gauge pressure by digesting spent
wash (distillation column bottom product) with anaerobic bacteria per
day. Compositions of biogas is:

¡P CH4 - 59% by volume
¡P CO2 - 38% by volume
¡P H2S - 1.7% by volume

We need to remove hydrogen sulfide and carbon dioxide from biogas to
increase burning efficiency and reduce storage capacity by using scrubber system or other economical method and it is good if system can recovery carbon dioxide also to use as raw material for beer production company nearby.

Our existing biogas storage capacity is 100 cubic meters at above pressure (there are 2 tanks 50m3) and we like to install purification system which can operate batch wise 3˜4 times per day. Firstly we store biogas one tank and then using purification system purify it while produce none purify biogas fill other tank. Please give attention for our requirement and inform us with method of purification, cost of the system and equipment like scrubber,
compressors, pumps, motors and storage pressure vessel.

If suppliers are comfortable with the above specs can quote us their best CFR Sri Lanka offers.

We will make the payment by cheque.

Regards
 
2019/8/17
 
Company Profile:
Company Name: Rockland Distillery
Company Type: Importer
Contact Person: Dumind Sirimewan
Webstie: ********
E-Mail:
Phone: ********
Fax: ********
Address: Mudukatuwa, Marawila, Sri Lanka
Country: Sri Lanka
 
 
 
 
 
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