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Why is biomass a much better option to natural gas?<br>
Competition between biomass gas and natural gas

In the last few years, the application of biomass gas is increasing. In many places, there emerge competitions between biomass fuels and gas. In this passage, I will take central heating boiler burning as an example, as well as compare the equipment price, operation expense and environment impact of biomass boiler as well as gas central heating boiler.



This blog site contrasts the economic and ecological impact of biomass fuel and gas. The devices cost of biomass boiler is higher than that of natural gas central heating boiler. Thinking about the high price of natural gas, the annual operating cost (including the price of gas, power, labors and upkeep) of natural gas is higher than biomass boiler.



When making use of biomass fuels, it calls for to be furnished with dirt collection agency, sulfur and nitrate removing tool to make certain the toxin emission fulfill the requirement. As for gas central heating boiler, it adopts low-nitrogen burning innovation or denitrification tool to make sure the NOx emission meet the criterion.



Analysis of biomass energy

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



According to the different resources, the biomass fuels can be categorized right into 6 kinds: crop straw, forestry waste, animal dung, water plants, power plants, life rubbish.



Biomass power has the adhering to advantages

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



Biomass energy additionally has some downsides:

Reduced energy thickness, not ideal for long-distance transport. To make sure read the article , it needs large room for storage, which brings management trouble.

Plant straw has vast circulation, however it is affected by regions, periods, climates and also other factors. The supply is not steady. Besides, the calorific value varies a lot. Some are not ideal for central heating boilers.

Different kinds of biomass fuels have various combustion effects, which might trigger slagging and leaves way too much ash. The alkaline material in the ash will certainly impede the constant work of biomass boiler and also cause deterioration.

Biomass gas are simple to obtain damp. The dampness web content have wonderful result on the combustion temperature level. Over-high dampness material will certainly make the biomass gas incapable to burn.



Affordable impact

Equipment expense

Take a 4t/h vapor central heating boiler for instance. The data processor of a DZL horizontal biomass central heating boiler prices around ￥ 180,000, the expense of supporting machinery and also installation is around ￥ 65,000, so the overall equipment expense is ￥ 245,000.



A WNS series gas central heating boiler prices around ￥ 150,000, the cost of supporting equipment and installment is ￥ 55,000, so the total devices price is ￥ 205,000. Therefore, the devices cost of biomass central heating boiler is higher than that of natural gas boiler



biomass fuel boilernatural gas central heating boiler.

Yearly operating cost

We still take a 4t/h vapor central heating boiler for instance, and also contrast the annual procedure cost of biomass fuels and gas boilers. The procedure expense of a boiler includes fuels cost, power consumption, labor price and also maintenance price



Yearly gas expense.

For instance:

The warm efficiency of a biomass boiler is 80%.

The calorific worth of biomass gas is 17.58 MJ/kg at the very least.

The expense of timber pellets is ￥ 1250/t.

A biomass central heating boiler eat 717kg wood pellet per hr.

The central heating boiler runs for 10 hours day-to-day.

The annual running time is 300days.

By computation, the annual gas cost is ￥ 2,688,800.



Yearly electrical fee.

As an example:.

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

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

After that the overall power of the biomass boiler is 39.5 kw.

The power price is ￥ 1.0/ kwh,.

The everyday running time is 10 hrs.

The yearly operating days are 300 days.

After that the electrical cost for a year is ￥ 118,500.



Yearly labor cost.

For example:.

The work has two shifts a day.

Each changes need 2 person. A firefighter as well as a water driver.

The income is ￥ 3000 each.

The labor price is 144,000 per year.



Yearly maintenance cost.

Biomass boiler generally has several auxiliary machinery. Their failure rate is more than gas boiler. The annual maintenance cost is in proportion to the tools expense. If the maintenance expense is 2.5% of the equipment cost, after that it is ￥ 6100 yearly.



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



Natural gas central heating boiler.

Yearly gas price.

For instance.

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

The calorific worth of gas is 35.58 MJ/kg.

The rate of natural gas is ￥ 3.1/ m3.

A gas central heating boiler can consume 315m3 natural gas every hour.

A gas central heating boiler runs 10 hours daily, 300 days annually.

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



Yearly electrical cost.

The power of the burner is 7.5 kw.

The power of water pump and various other power use devices is 7kw.

So the complete electrical power of the biomass boiler is 14.5 kw.

The electrical power rate is ￥ 1.0/ kwh.

The functioning time is 10 hours daily, 300 days each year.

So the annual electrical power cost is ￥ 43500.



Annual labor cost.

The job has 2 changes a day.

As the gas boiler has higher automation, as well as the procedure is simple, it calls for just 1 fire fighter.

The wage is ￥ 3000 per month, so the annual labor expense is ￥ 72000.



Annual upkeep cost.

The maintenance job of a gas boiler is very little, the cost is low.

Mean the maintenance cost is 1% of the devices cost, after that it is ￥ 2100 annually.

By calculation, the yearly running expense of a biomass boiler is ￥ 3,047,100.



Conclusion.

In terms of the devices expense, biomass central heating boiler is greater than natural gas boiler. In terms of the annual running expense, as gas boiler has higher automation level, needs less power intake tool, as well as much less maintenance, the electrical charge, labor price and maintenance expense is lower than that of biomass boiler. But considering the high price of natural gas, the complete procedure expense of natural gas central heating boiler is greater than that of biomass central heating boiler.



Environmental result.

Biomass gas.

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



These 2 boilers has similar dissipation capability. Both of them are not geared up with sulfur and also nitrate eliminating tool. Yet the first one is furnished with a bag-type dirt collection agency, as well as the second one is furnished with a film-type dust collector.



The boiler outfitted with film-type dirt enthusiast can decrease the ash exhaust successfully. In regards to SO2 exhaust, the timber pellets can meet the specified requirement also without sulfur removing device. As for NOx discharge, the timber pellets can fulfill the requirement in central heating boilers geared up with film-type dirt enthusiast.



Gas.

Gas is a high quality and clean gas fuel. The fostering of gas in the central heating boiler can minimize the air contamination remarkably. The ash, sulfur as well as nitrogen material in the natural gas is low. pellet maker for sale of natural gas consists of little SOx, which a satisfy stated requirement. But the NOx emission is still an issue. Researched discovered the NOx emission of natural gas boiler is 125mg/m3, and also 25% of them is more than 150mg/m3.



Verdict.

According to the analysis above, the sort of biomass gas has fantastic impact on the contaminant emission. Wood pellets has much less SO2 exhaust than straw pellets. The biomass central heating boiler with film-type dust collector has much better ash getting rid of impact than bag-type dust collection agency.



The NOx emission is past criterion in biomass boilers without sulfur or nitrate getting rid of gadget, whatever timber pellets or straw pellets. As a result, it is advise to outfit efficient dust collector, as well as sulfur and nitrate removing gadget.



Gas has advantages in reducing smoke and SO2 discharge. However with the enhancing exhaust standard, more gas boilers will adopt low-nitrogen burning innovation and also nitrate eliminating tool.



The particular benefits of natural gas as well as biomass fuel.

The rate of biomass boiler is greater than gas. Their operating cost is similar considering the increase of gas price. Besides, the gas boiler is less complicated to control, as well as it doesn't take much flooring space or gas storeroom.



The price of gas is under government control, so it will not change dramatically. The gas supply can be guaranteed when the gas boiler is in use. Biomass pellets supply is restricted by seasons. The cost and also supply is unstable, which normally occupies big storehouse room.



In terms of environmental management, biomass boilers need to be furnished with dirt enthusiast, sulfur and also nitrate removing device to make certain the smoke, SO2 as well as NOx exhaust satisfy the requirement. Yet gas central heating boilers does not require dirt collector or desulfurizer, yet it need to adopt low-nitrogen combustion modern technology or nitrate removing device to reduce the NOx discharge. Besides, the gas boiler doesn't need dust cleansing process.




On the other side, biomass gas is sustainable. It is solar energy transferred in plants by photosynthesis. As stats show, the biomass power produced by photosynthesis is 173 billion heap, but just 3% of them are made use of. Besides, biomass power is carbon neutral, which suggests the carbon dioxide usage in its development equates to the discharge in biomass fuel burning.



Fluidized-bed combustion is an innovation based on gas-solid fluidized state. It has good versatility to biomass fuels, the toxin gas exhaust is low. By including desulfurizer to the fluidized bed, it can get rid of the sulfur directly, and decrease the SO2 material in the smoke greatly.



Nowadays, the fluidized bed can be used for the burning of different sort of gas, appropriate for the co-firing of biomass as well as coals. The kind of gas and their proportion is flexible, so you can pick them according the rate to lower your expense.



The high rate of natural gas is a problem. And the cost variation between summer season and winter season is buckling down. Biomass is an exceptional alternative to traditional gas. To satisfy the ecological requirement and also achieve greater cost-effective benefits, it is important to enhance the application modern technology of biomass fuel, as well as increase the percentage of biomass in power mix.

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