Notes

Why is biomass a much better option to gas?<br>
Competition between biomass fuel as well as gas

Recently, the application of biomass fuel is enhancing. In many locations, there develop competitions in between biomass gas and also natural gas. In this flow, I will take central heating boiler burning for example, as well as compare the tools cost, operation cost and also environment effect of biomass central heating boiler and gas central heating boiler.



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



When utilizing biomass gas, it requires to be furnished with dust enthusiast, sulfur and nitrate eliminating device to make sure the toxin emission meet the requirement. As for natural gas central heating boiler, it takes on low-nitrogen combustion innovation or denitrification device to make certain the NOx emission satisfy the criterion.



Evaluation of biomass power

Biomass energy is solar energy transferred in biomass products in the form of chemical energy. It comes from the photosynthesis of environment-friendly plants. It has the kind of strong, liquid and gas. Biomass power is known as a renewable resource.



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



Biomass power has the complying with benefits

Inexpensive, broad distribution, huge volume, renewability, storable, easy to use.



Biomass power likewise has some negative aspects:

Reduced power thickness, not suitable for long-distance transportation. To make certain the biomass fuel supply, it calls for big room for storage space, which brings administration problem.

Plant straw has wide circulation, however it is influenced by areas, seasons, weather conditions and various other factors. The supply is not secure. Besides, the calorific value differs a lot. Some are not ideal for central heating boilers.

Different type of biomass fuels have various burning results, which may trigger slagging as well as leaves way too much ash. The alkaline material in the ash will certainly hinder the continual work of biomass boiler as well as trigger deterioration.

Biomass fuels are simple to obtain damp. The wetness web content have terrific effect on the combustion temperature. Over-high moisture web content will make the biomass gas unable to melt.



Economical impact

Equipment price

Take a 4t/h heavy steam central heating boiler for example. The data processor of a DZL horizontal biomass boiler prices around ￥ 180,000, the cost of complementary machinery and installment is around ￥ 65,000, so the overall tools price is ￥ 245,000.



A WNS series natural gas boiler costs around ￥ 150,000, the expense of auxiliary machinery as well as installment is ￥ 55,000, so the complete devices expense is ￥ 205,000. Consequently, the devices expense of biomass boiler is greater than that of gas boiler



biomass gas boilernatural gas boiler.

Yearly operating cost

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



Yearly fuel expense.

For example:

The warm effectiveness of a biomass boiler is 80%.

The calorific value of biomass fuel is 17.58 MJ/kg at the very least.

The cost of timber pellets is ￥ 1250/t.

A biomass boiler take in 717kg wood pellet per hr.

The boiler competes 10 hours daily.

The yearly running time is 300days.

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




Annual electrical cost.

For instance:.

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

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

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

The electricity price is ￥ 1.0/ kwh,.

The day-to-day running time is 10 hours.

The annual running days are 300 days.

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



Annual labor price.

For instance:.

The work has 2 shifts a day.

Each changes need 2 individual. A fireman and also a water operator.

The income is ￥ 3000 per person.

The labor cost is 144,000 annually.



Annual upkeep price.

Biomass boiler generally has many complementary machinery. Their failing rate is greater than gas central heating boiler. The yearly maintenance cost is in percentage to the tools expense. If the maintenance cost is 2.5% of the equipment price, then it is ￥ 6100 every year.



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



Gas boiler.


Yearly gas expense.

As an example.

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

The calorific value of gas is 35.58 MJ/kg.

The rate of gas is ￥ 3.1/ m3.

A gas boiler can consume 315m3 gas every hr.

A gas boiler operates 10 hours day-to-day, 300 days every year.

By calculation, the annual gas expense is ￥ 2,929,500.



Yearly electrical charge.

The power of the heater is 7.5 kw.

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

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

The electrical energy rate is ￥ 1.0/ kwh.

The functioning time is 10 hours each day, 300 days yearly.

So the annual electricity price is ￥ 43500.



Annual labor price.

The job has 2 shifts a day.

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

The wage is ￥ 3000 each month, so the yearly labor cost is ￥ 72000.



Annual upkeep cost.

The upkeep work of a gas boiler is not much, the cost is low.

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

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



Conclusion.

In regards to the equipment cost, biomass central heating boiler is higher than gas central heating boiler. In regards to the yearly running cost, as gas boiler has higher automation level, calls for less power usage tool, and also much less upkeep, the electrical charge, labor expense and also maintenance expense is less than that of biomass boiler. However considering the high rate of natural gas, the total procedure price of gas central heating boiler is more than that of biomass central heating boiler.



Ecological impact.

Biomass fuel.

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



These 2 central heating boilers has similar dissipation capability. Both of them are not furnished with sulfur as well as nitrate getting rid of tool. But the initial one is furnished with a bag-type dirt enthusiast, as well as the 2nd one is equipped with a film-type dust collector.



The boiler furnished with film-type dust collection agency can minimize the ash emission properly. In terms of SO2 discharge, the timber pellets can fulfill the specified standard also without sulfur getting rid of device. When it comes to NOx discharge, the timber pellets can fulfill the criterion in boilers equipped with film-type dust collector.



Gas.

Natural gas is a top quality and also tidy gas fuel. pellet press die set fostering of natural gas in the central heating boiler can lower the air pollution remarkably. The ash, sulfur and also nitrogen material in the gas is reduced. The smoke of gas contains little SOx, which a fulfill specified requirement. But the NOx exhaust is still a problem. Looked into located the NOx emission of gas boiler is 125mg/m3, as well as 25% of them is more than 150mg/m3.



Conclusion.

According to the evaluation over, the sort of biomass gas has great impact on the contaminant discharge. richi pellet mill has much less SO2 discharge than straw pellets. The biomass boiler with film-type dust collector has much better ash eliminating result than bag-type dust collection agency.



The NOx exhaust is past criterion in biomass boilers without sulfur or nitrate removing device, whatever timber pellets or straw pellets. For that reason, it is suggest to outfit efficient dust enthusiast, and sulfur as well as nitrate eliminating tool.



Natural gas has advantages in reducing smoke and also SO2 discharge. But with the increasing emission standard, more gas boilers will certainly take on low-nitrogen combustion modern technology and also nitrate removing tool.



The particular advantages of gas and also biomass gas.

The rate of biomass boiler is higher than gas. Their operating cost is similar considering the rise of natural gas rate. Besides, the gas central heating boiler is simpler to manage, and it doesn't take much flooring area or fuel storage room.



The cost of gas is under federal government control, so it won't vary sharply. The gas supply can be ensured when the gas central heating boiler is in usage. Biomass pellets supply is limited by periods. The rate and also supply is unsteady, which usually occupies huge storage facility space.



In terms of environmental protection, biomass boilers need to be equipped with dirt collector, sulfur and nitrate eliminating device to ensure the smoke, SO2 as well as NOx exhaust satisfy the standard. Yet gas central heating boilers does not need dirt collection agency or desulfurizer, however it need to adopt low-nitrogen burning technology or nitrate eliminating tool to cut the NOx discharge. Besides, the natural gas central heating boiler doesn't need dust cleaning process.



Beyond, biomass gas is eco-friendly. It is solar power deposited in plants by photosynthesis. As statistics reveal, the biomass power generated by photosynthesis is 173 billion bunch, yet only 3% of them are used. Besides, biomass power is carbon neutral, which suggests the CO2 usage in its growth equates to the exhaust in biomass gas burning.



Fluidized-bed combustion is a modern technology based upon gas-solid fluidized state. It has excellent versatility to biomass fuels, the pollutant gas emission is reduced. By including desulfurizer to the fluidized bed, it can remove the sulfur directly, and also lower the SO2 material in the smoke dramatically.



Nowadays, the fluidized bed can be made use of for the combustion of different kinds of gas, appropriate for the co-firing of biomass as well as coals. The kind of gas and their proportion is adjustable, so you can pick them according the price to decrease your cost.



The high cost of gas is a problem. And also the cost difference between summertime as well as winter season is getting serious. Biomass is an excellent alternative to typical fuels. To fulfill the environmental requirement and also achieve higher affordable benefits, it is essential to boost the application innovation of biomass fuel, and enhance the proportion of biomass in power mix.


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