Waste to Energy
Considerations when building gasification solutions.
For more details, please contact us by email or phone.
1. What’s the operational principle of your product? Does the Pyrolysis treatment mainly for organics matter and which kinds of material can you treat? (Municipal waste, kitchen waste, sludge, garden stuff or something more)?
- The system is a gasification process where all material fed into the system is thermally treated and partial oxidation occurs. The resulting syngas is directed to a custom burner that is attached to a boiler. The boiler produces steam and that steam is used to produce electricity. The system can handle a wide variety of fuels, and no pre-processing is required.
2. How about the investment for treating 400 tons municipal waste? Could you please give a list of all equipment included in the project and tell if the investment including the expense of civil works construction?
- $55-$65million USD. It does depend on the site conditions. Is the site cleared? Does the site have utilities and power lines to it that can support the facility operations? Is the site located on a river that can provide non-contact cooling water supply? etc
3. What are the special requirements of civil works construction?
- The heaviest equipment is the boiler. Standard piles and slab foundations will be required. A local civil company would need to be engaged that knows the local building codes and geographical details.
4. Please tell the total installed power and operating power of the equipment.
- The power output is based on quantity and quality of the incoming fuel. For a 400 ton per day facility, if the heating value of the fuel is around 5200 btu/lb, the power output would be approx 12.5MW’s. If the BTU value of the fuel is less, the power will decrease. If the BTU value is greater the Power may increase a little.
5. How many people needed to manage equipment and what are their responsibilities respectively?
- It would take a total of 7-10 people to run the project. We would include a staffing plan for the project that includes rotating shifts because the plant runs 24 hours a day and 7 days a week.
6. What is the operating power of the core equipment (Pyrolysis Equipment) and do you need any other heating source, if yes, please tell the consumption of that.
- The gasifier uses an external burner for start up. It can be propane, gas, diesel or natural gas. The start up burner would be included in the gasifier package.
7. How long the material retention time when in the core equipment?
- 45 minutes to an hour.
8. Please tell the operating temperature and pressure of the core equipment.
- The gasifier operates below atmospheric. The boiler operates at 750 PSIG and 750° F.
9. How long is needed to produce the complete set of equipment?
- Approx 12 months
10. How about the construction period for the whole project?
- Approx 18 months (including the 12 months for equipment manufacturing)
11. How about the required space for all equipment?
- For a 400 ton per day system approx 3~5 usable acres of property.
12. If generated energy from municipal waste is 10MW, and power consumption is 1MW, how much organic content existed in the 400 tons municipal waste and how about the moisture content?
- It depends on the BTU content. The system is designed for a BTU content of around 5200 btu/lb. Performance is impacted either positively if the BTU value is higher or negatively if the BTU value is lower.
13. How much moisture content is feasible?
- The system can handle fuels with a higher moisture, but really high moisture content may require the start up burner be re-ignited to aid in drying. It also may be possible to use the hot gases from the exhaust out of the stack to dry high moisture fuels in a rotary dryer.
14. How to treat, SOX, NOX and heavy metals in pyrolysis gas?
- SOX is treated in the scrubber where the acid gases are reduced by spraying in a reagent such as lime.
- NOX is controlled by efficient combustion and NOX reduction can be added if needed in the form of UREA.
- The low temperature of the syngas prevents many heavy metals from forming, however, heavy metals can be controlled with activated carbon injection.
15. What kind of product will be produced after pyrolysis gas combustion electricity production? How to prevent environmental pollution?
- After combustion, the gases are sent to a scrubber where lime and activated carbon is injected to control acid gases and heavy metals. Then the gases are directed to a baghouse that removes particulate matter. The gases are very clean when they leave the stack. Those hot gases could be used in a rotary dryer for high moisture fuels.
16. Is there any dioxin produced and how to control them?
- Dioxin production is very limited due to combustion control. Kentucky facility testing demonstrates less than 3 ng/dscm of dioxin production, which is just 10% of the State Regulatory limit of 30 ng/dscm.
17. Is there any fly ash from exhausted air and how to control them?
- Fly ash is collected in a baghouse and then transported to the fly ash storage silo for reuse in local building materials.