Notes

Why is biomass a better option to gas?<br>
Competitors in between biomass fuel as well as natural gas

In recent years, the application of biomass fuel is enhancing. In several locations, there develop competitions between biomass gas as well as natural gas. In this passage, I will certainly take central heating boiler burning for instance, and also contrast the tools cost, operation cost as well as setting effect of biomass boiler and also gas central heating boiler.



This blog contrasts the economic as well as ecological result of biomass gas and also natural gas. The equipment price of biomass central heating boiler is higher than that of natural gas boiler. Taking into consideration the high cost of gas, the annual operating cost (consisting of the price of gas, electrical power, labors and upkeep) of natural gas is higher than biomass central heating boiler.



When utilizing biomass gas, it calls for to be furnished with dirt collection agency, sulfur and also nitrate eliminating gadget to make certain the contaminant emission satisfy the requirement. When it comes to natural gas central heating boiler, it takes on low-nitrogen combustion technology or denitrification device to ensure the NOx emission meet the criterion.



Analysis of biomass power

Biomass power is solar power transferred in biomass products in the form of chemical power. It comes from the photosynthesis of green plants. It has the kind of solid, liquid and gas. Biomass power is referred to as a renewable resource.



According to the different resources, the biomass gas can be identified into 6 kinds: plant straw, forestry waste, animal dung, water plants, energy plants, life garbage.



Biomass power has the following benefits

Low cost, wide circulation, large volume, renewability, storable, easy to use.



Biomass power additionally has some drawbacks:

Reduced power density, not suitable for long-distance transportation. To make sure the biomass gas supply, it calls for huge space for storage space, which brings monitoring issue.

Plant straw has large circulation, yet it is affected by areas, periods, climates and other factors. The supply is not stable. Besides, the calorific worth varies a great deal. Some are not suitable for central heating boilers.

Various sort of biomass fuels have various combustion results, which might trigger slagging and also leaves way too much ash. The alkaline material in the ash will certainly hinder the continual job of biomass central heating boiler and also cause deterioration.

Biomass fuels are easy to get damp. The moisture content have terrific result on the combustion temperature. Over- hop pellet mill for sale will certainly make the biomass fuel unable to shed.



Affordable result

Devices expense

Take a 4t/h steam central heating boiler as an example. The mainframe of a DZL straight biomass boiler prices around ￥ 180,000, the expense of auxiliary equipment and also setup is around ￥ 65,000, so the overall devices expense is ￥ 245,000.



A WNS collection gas boiler costs around ￥ 150,000, the expense of complementary machinery as well as installment is ￥ 55,000, so the overall tools cost is ￥ 205,000. Consequently, the devices expense of biomass boiler is more than that of gas boiler



biomass gas boilernatural gas boiler.

Annual operating cost

We still take a 4t/h steam boiler for instance, as well as contrast the yearly operation expense of biomass fuels and gas boilers. The operation expense of a boiler consists of fuels cost, electrical energy usage, labor price and also maintenance price



Yearly fuel cost.

For example:

The warmth efficiency of a biomass central heating boiler is 80%.

The calorific value of biomass gas is 17.58 MJ/kg a minimum of.

The cost of wood pellets is ￥ 1250/t.

A biomass central heating boiler consume 717kg wood pellet per hour.

The central heating boiler competes 10 hours day-to-day.

The annual running time is 300days.

By estimation, the yearly fuel cost is ￥ 2,688,800.



Annual electric cost.

For instance:.

The overall power of a force as well as induce draft enjoyable is 29.5 kw.

The complete power of the reduction box, feeder, water pump as well as conveyor is 10kw.

Then the overall power of the biomass boiler is 39.5 kw.

The electrical energy price is ￥ 1.0/ kwh,.

The daily running time is 10 hours.

The yearly running days are 300 days.

Then the electrical fee for a year is ￥ 118,500.



Annual labor expense.

As an example:.

The job has two changes a day.

Each changes require 2 person. A firefighter and a water driver.

The income is ￥ 3000 each.

The labor price is 144,000 per year.



Annual maintenance price.

Biomass central heating boiler usually has lots of supporting machinery. Their failing price is greater than gas boiler. The yearly upkeep expense remains in proportion to the tools expense. If the upkeep expense is 2.5% of the equipment price, after that it is ￥ 6100 each year.



By estimation, the annual running price of biomass central heating boiler is ￥ 2,957,400.



Natural gas boiler.

Annual fuel expense.

For instance.

The warm efficiency of biomass boiler is 90%.

The calorific value of gas is 35.58 MJ/kg.

The rate of natural gas is ￥ 3.1/ m3.

A gas boiler can take in 315m3 gas every hour.

A gas boiler operates 10 hrs day-to-day, 300 days annually.

By estimation, the yearly gas cost is ￥ 2,929,500.



Yearly electrical cost.

The power of the heater is 7.5 kw.

The power of water pump as well as other power usage devices is 7kw.

So the complete electric power of the biomass central heating boiler is 14.5 kw.

The electricity rate is ￥ 1.0/ kwh.

The functioning time is 10 hours everyday, 300 days yearly.

So the annual electrical energy price is ￥ 43500.



Annual labor price.

The work has 2 shifts a day.

As the gas boiler has higher automation, and also the procedure is simple, it needs only 1 fire fighter.

The income is ￥ 3000 per month, so the annual labor price is ￥ 72000.



Yearly upkeep price.

The maintenance work of a gas central heating boiler is very little, the cost is reduced.

Mean the maintenance cost is 1% of the equipment expense, then it is ￥ 2100 each year.

By computation, the annual running expense of a biomass central heating boiler is ￥ 3,047,100.



Final thought.

In regards to the tools cost, biomass central heating boiler is higher than natural gas central heating boiler. In regards to the yearly running cost, as natural gas boiler has higher automation level, requires less power usage tool, and also much less upkeep, the electrical charge, labor cost and maintenance expense is lower than that of biomass central heating boiler. However thinking about the high price of natural gas, the overall operation expense of gas boiler is higher than that of biomass central heating boiler.



Environmental result.

Biomass gas.

Scientist gauged the exhaust of smoke, SO2 and also NOx in 2 biomass central heating boiler.





These 2 boilers has similar dissipation ability. Both of them are not furnished with sulfur as well as nitrate getting rid of device. However the very first one is geared up with a bag-type dust enthusiast, and also the second one is geared up with a film-type dust collection agency.



The central heating boiler equipped with film-type dust enthusiast can lower the ash discharge effectively. In regards to SO2 exhaust, the timber pellets can satisfy the stated criterion also without sulfur getting rid of gadget. As for NOx exhaust, the wood pellets can meet the requirement in central heating boilers geared up with film-type dirt enthusiast.



Natural gas.

Gas is an excellent quality and also tidy gas fuel. The adoption of gas in the boiler can decrease the air pollution extremely. The ash, sulfur and also nitrogen material in the natural gas is low. The smoke of natural gas contains little SOx, which a satisfy stated criterion. Yet the NOx discharge is still a problem. Investigated discovered the NOx discharge of natural gas boiler is 125mg/m3, as well as 25% of them is greater than 150mg/m3.



Verdict.

According to the analysis above, the kind of biomass gas has excellent impact on the toxin emission. Timber pellets has less SO2 emission than straw pellets. The biomass central heating boiler with film-type dirt collector has far better ash getting rid of impact than bag-type dirt collector.



The NOx exhaust is past requirement in biomass central heating boilers without sulfur or nitrate removing gadget, whatever timber pellets or straw pellets. Therefore, it is advise to furnish effective dirt enthusiast, as well as sulfur as well as nitrate getting rid of gadget.



Gas has advantages in cutting smoke and also SO2 exhaust. However with the enhancing emission standard, even more natural gas central heating boilers will adopt low-nitrogen combustion innovation and nitrate eliminating tool.



The particular benefits of gas as well as biomass fuel.

The price of biomass central heating boiler is greater than gas. Their operating expense is similar taking into consideration the rise of gas price. Besides, the gas boiler is simpler to control, and it doesn't take much flooring area or gas storeroom.



The price of natural gas is under government control, so it won't rise and fall dramatically. The gas supply can be ensured when the gas central heating boiler remains in use. Biomass pellets supply is restricted by seasons. The cost and supply is unpredictable, which normally takes up large storage facility area.



In regards to environmental protection, biomass boilers have to be equipped with dust enthusiast, sulfur and also nitrate removing tool to ensure the smoke, SO2 and NOx exhaust satisfy the standard. However natural gas boilers doesn't require dust enthusiast or desulfurizer, however it require to take on low-nitrogen burning modern technology or nitrate getting rid of device to reduce the NOx exhaust. Besides, the gas boiler does not need dirt cleansing process.



On the other side, biomass fuel is renewable. pellet making machine price is solar power deposited in plants by photosynthesis. As data show, the biomass energy produced by photosynthesis is 173 billion lot, however just 3% of them are made use of. Besides, biomass energy is carbon neutral, which implies the carbon dioxide usage in its growth equals the discharge in biomass fuel burning.



Fluidized-bed combustion is a modern technology based upon gas-solid fluidized state. It has good versatility to biomass gas, the toxin gas emission is low. By including desulfurizer to the fluidized bed, it can eliminate the sulfur straight, and also lower the SO2 content in the smoke sharply.



Nowadays, the fluidized bed can be utilized for the burning of different sort of gas, ideal for the co-firing of biomass and also coals. The sort of gas and also their percentage is adjustable, so you can choose them according the price to decrease your cost.



The high rate of natural gas is a trouble. And the price difference between summer and also winter is buckling down. Biomass is an excellent alternative to typical gas. To meet the environmental demand and attain higher economical benefits, it is very important to enhance the application innovation of biomass gas, and increase the proportion of biomass in power mix.


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