Tag Archives: gasifier

gasifier gasification machine

Gasifier – Gasification process from biomass / charcoal

A gasifier project. “I use charcoal as fuel, with reduced amount of air (oxidizing agent) can mix with water for obtaining more hydrogen (increasing flamespeed) or use more exhaust gasses in the reactor inlet. (Reducing the consumption of carbon) the sabatier reaction in the load depending reduction zone converts almost all CO2 into useable gas. This avoids the sabatier reaction to occur. (CO2+H2= CH4+H2O)”

มันคือการแก๊สซิเคชันโดยใช้ถ่านไม้แทนใช้ชีวมวล แน่นอนแก๊สที่ได้ย่อมมีคุณภาพดีกว่าการใช้ชีวมวล ส่วนที่พูดถึง sabatier reaction เป็นปฏิกิริยา CO2 + 4H2 = CH4 + 2H2O ไม่น่าจะเกิดได้ เพราะปกติปฏิกิริยานี้ต้องมีแคตาลิสต์ (ตัวเร่งปฏิกริยา) ด้วย มันไม่ได้เกิดง่ายๆที่สภาวะแก๊สซิฟิเคชันทั่วไป

ปฏิกิริยาหลักๆ ที่เกิดในกระบวนการแก๊สซิฟิเคชันคือ
biomass + heat —> volatile + char
char + O2 —> CO2
char + H2O —> H2 + CO
char + CO —> CO2

คุณภาพแก๊สที่ได้ขึ้นกับชีวมวลและปฏิกิริยาเคมีที่เกิดขึ้น ซึ่งตรงนี้ควบคุมโดยการออกแบบแก๊สซิฟายเออร์ให้เหมาะสม

gasifier gasification machinehttp://www.thaisumi.com




napier grass, หญ้าเลี้ยงช้าง, หญ้าเนเปีย, ไฟฟ้า

Napier Grass as raw material for gasification process to generate electricity

Napier Grass as raw material for gasification process to generate electricity.


Napier grass is becoming a popular biomass for gasification process to generate electricity in Thailand. Government office also issued the project that subsidizes napier grass as raw material for power plants.

The critical factors for Napier grass for power plants projects are harvesting of the grass, moisture content in the grass, transportation to the preparation factory, and making the dried grass into pellet form or else to be able to use in the reactor of gasification process.

Muddy area can be problem for harvesting and the moisture content in the grass can be as high as 70% (not included the water from rain if the case), causing high cost to dry the grass. Transportation cost and pelletizing cost are also to be considered too. Raw material preparation process includes;

Biomass chipper/cutting
Biomass material: Sugar cane stalks or Napier Grass stalks or similar can be mixed and used in most gasifier. Also woody biomass like wood chips or coconut shells can also be used but they might require a chipping or good cutting technology.

Sample of Output chip/strand size required:
Preferred:    sum of average chip/strand dimensions (L + W + H) at 50 mm
Maximum:     sum of average chip/strand dimensions (L + W + H) at 75 mm
Moisture content input biomass from 50-70% (by weight)
Throughput: minimum 5.0 tph fresh biomass per unit for 1 MWatt power plant size.
Auxilliaries: (i) dust collection system.  (ii) dust storage system.

Biomass Drying Unit
Technology type:  Rotary dryer or Columnar type dryer
Fuel:  Biomass (grass itself, wood chips, waste wood), LPG, also Drying heat source: ambient air diluted hot gen set exhaust. Direct gen set exhaust will be between 430 and 470 Deg C and we will dilute down temperature with air to required dryer operating temperature.

Chip/strand size input:
Expected Average:      sum of average chip/strand dimensions (L + W + H) at 50-75 mm
Expected Maximum:    sum of average chip/strand dimensions (L + W + H) at 100 mm

Moisture content input biomass (maximum 70% moisture content;  target output moisture content at maximum 18-20%

Auxilliaries: (i) feed system  (ii) discharge system.

This is just sample idea about the raw material preparation and gasifier related machines.

Napier grass, elephant grass, Thai Sumi, www.thaisumi.com

charcoal briquette making from biomass wastes and sugarcane waste

[QUESTION]: Dear Sir,

I am interested in Machinery to produce charcoal briquett. I intend to start the project in my country. Please do email me a price quote for the whole system including the information (manual) on how to make them. I am specifically interested in making charcoal from coffee husks, rice husks , coconut husks, macadamia husks saw dust and maize cobs.

I don’t know whether your machines can support making charcoal from sugar cane wastes? please let me know.

Thanking you and looking forward to your response.


———- Answer ———-

[ANSWER]:? From the listed raw materials (coffee husks, rice husks , coconut husks, macadamia husks saw dust, maize cobs, and sugar cane waste), in order to make them into charcoal briquette, we would like to classify them into 2 groups which require different process; Hot process and Cold process.

Hot process : coffee husks, rice husks, macadamia husks, sawdust

Cold process : Maize cobs, Coconut husks (coconut shell?), Sugar cane waste

The hot process is more complicated, requires high skilled personals, require 5-6 times higher investment than that of cold process.

The cold process is suitable for above mentioned materials (Maize cobs, Coconut husks (coconut shell?), Sugar cane waste). However, the best quality of charcoal briquette you can get among those three materials is coconut shell, maize cob and sugar case waste respectively.

We would recommend you to start with only maize cobs and coconut shell first because their quality are good.

About machines of cold process, we can supply to you the machine and guarantee that you will be able to produce good quality (high density) briquette.

We will not only provide you the machine but we will also provide to you all related information, document and know-how. You will receive full operating manual, document and necessary know-how with the machine. Please kindly find our machine’s brochure as attachment. The complete unit as quoted comprises 1 crusher, 1 mixer-dispenser (can be used for 2 extruders), and 2 extruders. The production capacity is about 300-400 kg/hour of wood charcoal or any other biomass charcoal. You can add 1 more extruder to the quotation to double the capacity because the mixer and crusher is already designed for 2 extruders. Automatic cutting units are optional. We already give the manual cutting units with the extruders but if you need automatic cuttings, you can purchase as optional unit.

We can also offer the conveyor and other additional unit as per your request too.

Please give us comment about the above suggestion. Then we will get back to you again with further information asap.