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Why is biomass a better option to natural gas?<br>
Competitors between biomass fuel and also gas


In recent times, the application of biomass fuel is raising. In several areas, there occur competitions in between biomass gas and natural gas. In this passage, I will certainly take boiler burning as an example, as well as compare the tools cost, procedure price and atmosphere impact of biomass boiler and gas boiler.



This blog site contrasts the financial and also environmental result of biomass fuel and also natural gas. The tools cost of biomass boiler is more than that of natural gas boiler. Considering this hyperlink of gas, the yearly operating expense (including the price of fuel, electrical energy, labors and maintenance) of natural gas is greater than biomass central heating boiler.



When making use of biomass fuels, it needs to be outfitted with dirt enthusiast, sulfur and nitrate getting rid of tool to make sure the contaminant exhaust satisfy the requirement. As for gas central heating boiler, it takes on low-nitrogen combustion innovation or denitrification tool to guarantee the NOx emission satisfy the criterion.



Evaluation of biomass power

Biomass power is solar power deposited in biomass products in the form of chemical energy. It comes from the photosynthesis of environment-friendly plants. It has the kind of strong, fluid and gas. Biomass power is called a renewable energy.



According to the different sources, the biomass fuels can be identified into 6 kinds: plant straw, forestry waste, animal dung, water plants, power plants, life waste.



Biomass power has the adhering to benefits

Affordable, large circulation, big quantity, renewability, storable, easy to use.



Biomass power likewise has some downsides:

Low energy thickness, not suitable for long-distance transport. To make certain the biomass fuel supply, it calls for big room for storage space, which brings monitoring issue.

Crop straw has large circulation, but it is impacted by regions, seasons, weathers as well as other factors. The supply is not secure. Besides, the calorific worth varies a great deal. richi pellet machine are not suitable for central heating boilers.

Various type of biomass gas have various burning results, which may cause slagging as well as leaves excessive ash. The alkaline web content in the ash will prevent the continual work of biomass boiler and trigger corrosion.

Biomass fuels are easy to obtain damp. The dampness material have terrific impact on the combustion temperature. Over-high dampness material will make the biomass gas unable to shed.



Affordable effect

Tools cost

Take a 4t/h vapor central heating boiler for example. The data processor of a DZL straight biomass central heating boiler prices around ￥ 180,000, the cost of complementary equipment and installment is around ￥ 65,000, so the complete equipment cost is ￥ 245,000.



A WNS collection natural gas boiler prices around ￥ 150,000, the price of auxiliary equipment and installment is ￥ 55,000, so the overall tools expense is ￥ 205,000. Consequently, the equipment price of biomass central heating boiler is more than that of natural gas central heating boiler



biomass gas boilernatural gas central heating boiler.

Annual operating cost

We still take a 4t/h steam boiler for example, and contrast the annual procedure expense of biomass gas and gas central heating boilers. The operation expense of a central heating boiler includes fuels price, electrical power usage, labor cost and maintenance cost



Annual fuel cost.

For example:

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

The calorific worth of biomass fuel is 17.58 MJ/kg at least.

The cost of timber pellets is ￥ 1250/t.

A biomass central heating boiler take in 717kg timber pellet per hour.

The boiler competes 10 hours day-to-day.

The yearly running time is 300days.

By calculation, the yearly fuel expense is ￥ 2,688,800.



Yearly electric charge.

As an example:.

The complete power of a pressure and induce draft fun is 29.5 kw.

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

Then the total power of the biomass central heating boiler is 39.5 kw.

The electricity rate is ￥ 1.0/ kwh,.

The daily running time is 10 hours.

The annual operating days are 300 days.

Then the electric cost for a year is ￥ 118,500.



Annual labor cost.

For example:.

The work has two changes a day.

Each shifts need 2 individual. A fireman as well as a water operator.

The wage is ￥ 3000 per person.

The labor expense is 144,000 annually.



Yearly upkeep cost.

Biomass boiler usually has several supporting machinery. Their failing rate is higher than gas boiler. The yearly maintenance expense is in proportion to the equipment cost. If the upkeep price is 2.5% of the equipment expense, after that it is ￥ 6100 annually.



By computation, the annual running cost of biomass boiler is ￥ 2,957,400.



Natural gas central heating boiler.

Yearly gas expense.

For instance.

The warmth efficiency of biomass central heating boiler is 90%.

The calorific worth of natural gas is 35.58 MJ/kg.

The rate of gas is ￥ 3.1/ m3.

A gas boiler can eat 315m3 natural gas every hour.

A gas boiler runs 10 hours daily, 300 days each year.

By estimation, the yearly fuel expense is ￥ 2,929,500.



Yearly electric fee.

The power of the heater is 7.5 kw.

The power of water pump as well as various other power application equipment is 7kw.

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

The electrical energy price is ￥ 1.0/ kwh.

The working time is 10 hrs each day, 300 days annually.

So the annual electrical power price is ￥ 43500.



Annual labor price.

The work has 2 shifts a day.

As the gas boiler has higher automation, as well as the operation is basic, it needs just 1 firefighter.

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



Yearly upkeep expense.

The upkeep work of a gas boiler is very little, the price is low.

Expect the maintenance cost is 1% of the tools cost, after that it is ￥ 2100 each year.

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



Conclusion.

In regards to the equipment price, biomass central heating boiler is higher than gas boiler. In terms of the annual running cost, as gas central heating boiler has higher automation degree, needs less power consumption device, as well as less maintenance, the electrical charge, labor expense and upkeep expense is less than that of biomass central heating boiler. But thinking about the high price of natural gas, the complete procedure cost of gas central heating boiler is greater than that of biomass boiler.



Ecological result.

Biomass fuel.

Researchers gauged the discharge of smoke, SO2 as well as NOx in 2 biomass central heating boiler.



These 2 boilers has similar evaporation capacity. Both of them are not geared up with sulfur and also nitrate removing device. However the initial one is equipped with a bag-type dirt collection agency, and the 2nd one is outfitted with a film-type dust collector.



The central heating boiler geared up with film-type dirt collector can decrease the ash discharge effectively. In regards to SO2 exhaust, the timber pellets can fulfill the stated standard also without sulfur removing tool. As for NOx emission, the timber pellets can meet the standard in central heating boilers outfitted with film-type dirt collection agency.



Natural gas.

Gas is a high quality and clean gas fuel. The adoption of gas in the central heating boiler can reduce the air pollution remarkably. The ash, sulfur as well as nitrogen web content in the gas is low. The smoke of gas includes little SOx, which a meet stated criterion. But the NOx emission is still a trouble. Investigated discovered the NOx exhaust of natural gas boiler is 125mg/m3, as well as 25% of them is more than 150mg/m3.



Final thought.

According to the evaluation over, the sort of biomass fuel has wonderful influence on the pollutant emission. Timber pellets has much less SO2 discharge than straw pellets. The biomass boiler with film-type dirt collection agency has better ash getting rid of result than bag-type dust enthusiast.



The NOx exhaust is beyond requirement in biomass boilers without sulfur or nitrate getting rid of tool, whatever timber pellets or straw pellets. Therefore, it is suggest to furnish efficient dust collector, and sulfur and nitrate removing gadget.



Gas has advantages in cutting smoke as well as SO2 discharge. However with the enhancing discharge criterion, even more gas central heating boilers will certainly take on low-nitrogen burning modern technology and nitrate removing gadget.



The particular benefits of natural gas and biomass fuel.

The rate of biomass boiler is greater than gas. Their operating cost is comparable taking into consideration the surge of natural gas price. Besides, the natural gas central heating boiler is much easier to manage, and also it doesn't take much floor room or gas storeroom.



The price of gas is under federal government control, so it won't vary dramatically. The gas supply can be assured when the gas central heating boiler remains in usage. Biomass pellets supply is limited by periods. The cost and supply is unsteady, which normally occupies big storage facility space.



In regards to environmental management, biomass boilers have to be geared up with dust collection agency, sulfur as well as nitrate getting rid of tool to make certain the smoke, SO2 and NOx exhaust meet the criterion. But gas central heating boilers does not need dirt enthusiast or desulfurizer, however it require to embrace low-nitrogen burning technology or nitrate getting rid of gadget to reduce the NOx discharge. Besides, the gas central heating boiler does not require dirt cleaning process.



Beyond, biomass fuel is sustainable. It is solar energy transferred in plants by photosynthesis. As statistics show, the biomass power created by photosynthesis is 173 billion ton, but only 3% of them are used. Besides, biomass energy is carbon neutral, which suggests the carbon dioxide consumption in its development amounts to the exhaust in biomass fuel burning.



Fluidized-bed burning is a modern technology based on gas-solid fluidized state. It has good flexibility to biomass fuels, the toxin gas emission is reduced. By adding desulfurizer to the fluidized bed, it can remove the sulfur directly, and also decrease the SO2 content in the smoke greatly.



Nowadays, the fluidized bed can be utilized for the burning of various kinds of gas, appropriate for the co-firing of biomass and also coals. The sort of fuels as well as their percentage is adjustable, so you can choose them according the cost to reduce your price.



The high cost of gas is a trouble. And the price disparity in between summer season as well as winter season is buckling down. Biomass is an exceptional alternative to typical gas. To meet the ecological demand and also accomplish higher cost-effective advantages, it is necessary to boost the application technology of biomass fuel, as well as raise the proportion of biomass in power mix.

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