Notes

Why is biomass a better choice to natural gas?<br>
Competition in between biomass fuel and also natural gas

Recently, the application of biomass fuel is boosting. In numerous areas, there develop competitions in between biomass gas and also gas. In rabbit feed pellet making machine , I will certainly take central heating boiler burning for instance, and also compare the tools price, procedure price and environment result of biomass central heating boiler and also natural gas boiler.



This blog contrasts the economic as well as ecological effect of biomass fuel and also gas. The tools cost of biomass boiler is more than that of natural gas boiler. Thinking about the high cost of gas, the annual operating cost (including the cost of gas, electrical energy, labors and maintenance) of natural gas is higher than biomass boiler.



When using biomass fuels, it requires to be outfitted with dust collection agency, sulfur and nitrate removing device to guarantee the contaminant discharge meet the criterion. When it comes to gas boiler, it takes on low-nitrogen burning technology or denitrification device to make sure the NOx discharge satisfy the criterion.



Evaluation of biomass power


Biomass power 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 kind of solid, fluid as well as gas. Biomass energy is called a renewable resource.



According to the various sources, the biomass gas can be categorized into 6 kinds: plant straw, forestry waste, pet dung, water plants, energy plants, life rubbish.



Biomass power has the adhering to advantages

Affordable, vast circulation, huge volume, renewability, storable, easy to use.



Biomass power likewise has some downsides:

Reduced power density, not appropriate for long-distance transport. To make sure the biomass fuel supply, it needs big space for storage space, which brings administration trouble.

Crop straw has large distribution, yet it is impacted by regions, periods, weather conditions and also other aspects. The supply is not secure. Besides, the calorific worth varies a whole lot. Some are not ideal for boilers.

Different sort of biomass gas have different burning impacts, which might cause slagging as well as leaves too much ash. The alkaline web content in the ash will certainly prevent the continuous job of biomass boiler and also trigger deterioration.

Biomass fuels are very easy to get damp. Richi machine have excellent result on the combustion temperature level. Over-high wetness material will certainly make the biomass gas unable to melt.



Cost-effective result

Devices expense

Take a 4t/h steam boiler for instance. The data processor of a DZL straight biomass central heating boiler costs around ￥ 180,000, the expense of supporting machinery as well as setup is around ￥ 65,000, so the total tools expense is ￥ 245,000.



A WNS collection natural gas boiler expenses around ￥ 150,000, the cost of supporting machinery and also installation is ￥ 55,000, so the overall devices expense is ￥ 205,000. Therefore, the tools expense of biomass boiler is higher than that of natural gas boiler



biomass gas boilernatural gas boiler.

Annual operating expense

We still take a 4t/h vapor central heating boiler as an example, and also contrast the annual operation expense of biomass fuels as well as gas boilers. The procedure price of a boiler includes fuels cost, electrical energy usage, labor cost and also upkeep cost



Yearly fuel cost.

For instance:

The warmth effectiveness of a biomass boiler is 80%.

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

The expense of timber pellets is ￥ 1250/t.

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

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

The annual running time is 300days.

By computation, the annual fuel price is ￥ 2,688,800.



Yearly electrical charge.

For example:.

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

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

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

The power cost is ￥ 1.0/ kwh,.

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

The yearly operating days are 300 days.

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



Annual labor expense.

As an example:.

The work has two shifts a day.

Each changes require 2 person. A fire fighter and a water operator.

The wage is ￥ 3000 each.

The labor expense is 144,000 annually.



Annual upkeep price.

Biomass boiler usually has numerous complementary equipment. Their failing price is greater than gas central heating boiler. The annual upkeep cost remains in proportion to the equipment price. If the upkeep cost is 2.5% of the tools price, after that it is ￥ 6100 yearly.



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



Natural gas boiler.

Annual fuel price.

For example.

The warmth effectiveness of biomass boiler is 90%.

The calorific value of gas is 35.58 MJ/kg.

The cost of natural gas is ￥ 3.1/ m3.

A gas central heating boiler can eat 315m3 gas every hour.

A gas central heating boiler runs 10 hrs everyday, 300 days yearly.

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



Annual electrical fee.

The power of the burner is 7.5 kw.

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

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

The electrical energy price is ￥ 1.0/ kwh.

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

So the yearly electrical energy cost is ￥ 43500.



Annual labor expense.

The job has 2 changes a day.

As the gas boiler has greater automation, and also the procedure is easy, it requires just 1 fire fighter.

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



Annual maintenance cost.

The upkeep job of a gas central heating boiler is very little, the cost is low.

Intend the upkeep cost is 1% of the equipment expense, after that it is ￥ 2100 each year.

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



Conclusion.

In regards to the equipment cost, biomass central heating boiler is greater than gas boiler. In terms of the annual running price, as gas central heating boiler has higher automation level, requires less power usage device, and also much less maintenance, the electric fee, labor expense as well as upkeep expense is less than that of biomass boiler. But thinking about the high cost of natural gas, the total procedure expense of natural gas boiler is more than that of biomass boiler.



Ecological effect.

Biomass fuel.

Researchers measured the exhaust of smoke, SO2 and NOx in 2 biomass boiler.



These 2 central heating boilers has comparable evaporation capability. Both of them are not geared up with sulfur and nitrate removing device. Yet the initial one is equipped with a bag-type dirt collection agency, as well as the 2nd one is equipped with a film-type dirt collection agency.



The central heating boiler geared up with film-type dust collection agency can minimize the ash exhaust effectively. In regards to SO2 emission, the timber pellets can fulfill the stipulated criterion also without sulfur removing tool. As for NOx discharge, the timber pellets can meet the requirement in central heating boilers geared up with film-type dirt enthusiast.



Natural gas.

Natural gas is an excellent quality and also tidy gas fuel. The adoption of natural gas in the central heating boiler can decrease the air pollution remarkably. The ash, sulfur as well as nitrogen content in the gas is reduced. The smoke of gas consists of little SOx, which a satisfy stipulated requirement. Yet the NOx emission is still a trouble. Researched discovered the NOx emission of natural gas central heating boiler is 125mg/m3, and also 25% of them is more than 150mg/m3.



Verdict.

According to the analysis above, the sort of biomass fuel has wonderful influence on the pollutant emission. Wood pellets has much less SO2 exhaust than straw pellets. The biomass central heating boiler with film-type dust collection agency has far better ash eliminating impact than bag-type dust collector.



The NOx exhaust is beyond standard in biomass boilers without sulfur or nitrate removing tool, whatever wood pellets or straw pellets. As a result, it is suggest to furnish effective dust collector, and sulfur and nitrate removing device.



Natural gas has advantages in reducing smoke and also SO2 discharge. However with the increasing discharge requirement, more gas central heating boilers will take on low-nitrogen burning technology and nitrate eliminating tool.




The corresponding benefits of natural gas and biomass gas.

The cost of biomass central heating boiler is higher than natural gas. Their operating expense is comparable thinking about the rise of natural gas rate. Besides, pellet manufacturing equipment is easier to manage, and also it doesn't take much flooring area or gas storage room.



The cost of gas is under government control, so it won't rise and fall greatly. The natural gas supply can be ensured when the gas central heating boiler remains in use. Biomass pellets supply is restricted by periods. The price and also supply is unsteady, which usually occupies huge warehouse space.



In regards to environmental management, biomass boilers need to be geared up with dust collector, sulfur as well as nitrate removing tool to guarantee the smoke, SO2 and NOx discharge satisfy the standard. However gas boilers does not require dirt collection agency or desulfurizer, but it need to embrace low-nitrogen combustion innovation or nitrate removing gadget to reduce the NOx exhaust. Besides, the natural gas boiler does not require dirt cleaning process.



On the other side, biomass fuel is eco-friendly. It is solar power transferred in plants by photosynthesis. As statistics show, the biomass power generated by photosynthesis is 173 billion heap, however just 3% of them are made use of. Besides, biomass energy is carbon neutral, which means the CO2 intake in its development equals the exhaust in biomass fuel burning.



Fluidized-bed combustion is a modern technology based upon gas-solid fluidized state. It has good flexibility to biomass fuels, the toxin gas discharge is reduced. By adding desulfurizer to the fluidized bed, it can eliminate the sulfur directly, and decrease the SO2 material in the smoke dramatically.



Nowadays, the fluidized bed can be used for the combustion of various kinds of fuels, suitable for the co-firing of biomass as well as coals. The type of fuels as well as their proportion is flexible, so you can select them according the price to lower your expense.



The high price of natural gas is a problem. And also the rate disparity in between summer season as well as winter is buckling down. Biomass is an exceptional replacement for traditional gas. To satisfy the ecological demand as well as achieve greater affordable advantages, it is necessary to enhance the application innovation of biomass fuel, and also increase the percentage of biomass in power mix.


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