Notes

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

In the last few years, the application of biomass fuel is raising. In hay pellet maker of locations, there arise competitions in between biomass fuels and natural gas. In this flow, I will certainly take boiler burning for example, and contrast the equipment expense, procedure expense and also atmosphere effect of biomass central heating boiler and gas boiler.



This blog site contrasts the financial as well as ecological impact of biomass gas and gas. The equipment expense of biomass boiler is higher than that of gas boiler. Taking into consideration the high price of natural gas, the yearly operating expense (including the price of fuel, electrical power, labors and maintenance) of natural gas is more than biomass central heating boiler.



When utilizing biomass gas, it calls for to be equipped with dust collector, sulfur and nitrate eliminating gadget to guarantee the toxin exhaust fulfill the standard. As for gas central heating boiler, it adopts low-nitrogen burning technology or denitrification device to make certain the NOx exhaust satisfy the standard.



Evaluation of biomass power

Biomass power is solar energy transferred in biomass materials in the form of chemical power. It comes from the photosynthesis of green plants. It has the form of strong, liquid and gas. Biomass energy is called a renewable resource.



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



Biomass power has the adhering to benefits

Inexpensive, large distribution, large quantity, renewability, storable, easy to use.



Biomass energy likewise has some drawbacks:

Reduced energy thickness, not ideal for long-distance transport. To guarantee the biomass gas supply, it calls for huge space for storage space, which brings management issue.

Plant straw has vast distribution, however it is influenced by areas, seasons, weather conditions and other elements. The supply is not secure. Besides, the calorific value differs a lot. manual fish feed pellet machine are not ideal for central heating boilers.

Various type of biomass fuels have different combustion effects, which might trigger slagging as well as leaves too much ash. The alkaline material in the ash will certainly prevent the constant job of biomass central heating boiler and also create deterioration.

Biomass gas are easy to obtain damp. The dampness content have fantastic effect on the burning temperature. Over-high dampness content will make the biomass gas incapable to burn.



Cost-effective result

Equipment price

Take a 4t/h vapor central heating boiler as an example. The data processor of a DZL straight biomass central heating boiler costs around ￥ 180,000, the price of auxiliary equipment and installment is around ￥ 65,000, so the overall tools price is ￥ 245,000.



A WNS collection gas boiler prices around ￥ 150,000, the expense of supporting machinery as well as installment is ￥ 55,000, so the total equipment expense is ￥ 205,000. Therefore, the tools price of biomass central heating boiler is more than that of gas boiler



biomass gas boilernatural gas central heating boiler.

Yearly operating expense

We still take a 4t/h steam central heating boiler for instance, as well as contrast the annual operation price of biomass fuels and also natural gas central heating boilers. The procedure price of a boiler includes fuels cost, electrical energy intake, labor cost and maintenance expense



Annual fuel price.

For instance:

The warmth performance of a biomass boiler is 80%.

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

The price of wood pellets is ￥ 1250/t.

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

The central heating boiler competes 10 hours daily.

The yearly running time is 300days.

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



Yearly electrical fee.

For example:.

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.

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

The electrical power cost is ￥ 1.0/ kwh,.

The everyday running time is 10 hours.

The yearly running days are 300 days.

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



Yearly labor expense.

For instance:.

The job has two changes a day.

Each changes need 2 person. A fire fighter as well as a water operator.

The income is ￥ 3000 each.

The labor price is 144,000 annually.



Annual maintenance price.

Biomass boiler normally has lots of auxiliary machinery. Their failure rate is higher than gas boiler. The yearly maintenance price remains in proportion to the devices price. If the upkeep expense is 2.5% of the devices expense, after that it is ￥ 6100 each year.



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



Natural gas central heating boiler.

Annual fuel expense.

For instance.

The heat effectiveness 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 boiler can consume 315m3 gas every hour.

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

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




Yearly electric cost.

The power of the burner is 7.5 kw.

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

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

The electrical energy cost is ￥ 1.0/ kwh.

The working time is 10 hrs daily, 300 days annually.

So the annual power price is ￥ 43500.



Yearly labor cost.

The work has 2 changes a day.

As the gas boiler has higher automation, and the operation is easy, it needs only 1 firefighter.

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



Annual maintenance expense.

The maintenance job of a gas central heating boiler is not much, the expense is reduced.

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

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



Conclusion.

In terms of the tools expense, biomass boiler is greater than gas boiler. In regards to the annual running cost, as natural gas central heating boiler has greater automation degree, requires less power intake tool, and also much less maintenance, the electric fee, labor cost as well as maintenance expense is lower than that of biomass central heating boiler. Yet thinking about the high cost of gas, the overall operation price of gas boiler is greater than that of biomass central heating boiler.



Ecological result.

Biomass gas.

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



These 2 central heating boilers has similar evaporation capacity. Both of them are not equipped with sulfur as well as nitrate eliminating gadget. Yet the initial one is equipped with a bag-type dust collector, and the second one is outfitted with a film-type dust collection agency.




The central heating boiler equipped with film-type dust collection agency can minimize the ash exhaust properly. In terms of SO2 discharge, the wood pellets can satisfy the specified criterion even without sulfur eliminating device. When it comes to NOx exhaust, the wood pellets can meet the criterion in central heating boilers equipped with film-type dust enthusiast.



Gas.

Natural gas is a high quality and also tidy gas fuel. The fostering of natural gas in the boiler can reduce the air pollution remarkably. The ash, sulfur and also nitrogen material in the gas is reduced. The smoke of natural gas consists of little SOx, which a satisfy stipulated standard. But the NOx exhaust is still a problem. Looked into found the NOx discharge of natural gas central heating boiler is 125mg/m3, as well as 25% of them is more than 150mg/m3.



Verdict.

According to the evaluation over, the kind of biomass fuel has wonderful impact on the pollutant exhaust. Timber pellets has less SO2 emission than straw pellets. The biomass central heating boiler with film-type dirt enthusiast has much better ash getting rid of effect than bag-type dirt collection agency.



The NOx emission is past criterion in biomass boilers without sulfur or nitrate getting rid of tool, whatever timber pellets or straw pellets. For that reason, it is suggest to outfit reliable dust collection agency, as well as sulfur and also nitrate removing device.



Natural gas has advantages in cutting smoke and also SO2 discharge. Yet with the boosting emission standard, even more natural gas boilers will adopt low-nitrogen combustion innovation and also nitrate eliminating gadget.



The particular benefits of gas and biomass fuel.

The rate of biomass central heating boiler is more than natural gas. Their operating expense is similar taking into consideration the rise of natural gas cost. Besides, the gas boiler is simpler to regulate, and it doesn't take much floor room or gas storage room.



The price of natural gas is under government control, so it won't change sharply. official source can be guaranteed when the gas boiler is in usage. Biomass pellets supply is restricted by periods. The rate and also supply is unsteady, which typically occupies big storehouse area.



In regards to environmental management, biomass central heating boilers have to be furnished with dirt enthusiast, sulfur as well as nitrate removing device to make certain the smoke, SO2 and also NOx discharge fulfill the criterion. But gas central heating boilers doesn't require dirt collector or desulfurizer, but it require to take on low-nitrogen combustion technology or nitrate removing gadget to reduce the NOx emission. Besides, the gas boiler doesn't need dirt cleansing procedure.



On the other side, biomass fuel is eco-friendly. It is solar energy transferred in plants by photosynthesis. As stats reveal, the biomass energy created by photosynthesis is 173 billion heap, yet just 3% of them are utilized. Besides, biomass power is carbon neutral, which means the carbon dioxide consumption in its growth equates to the discharge in biomass gas burning.



Fluidized-bed burning is a technology based upon gas-solid fluidized state. It has excellent flexibility to biomass gas, the pollutant gas emission is low. By including desulfurizer to the fluidized bed, it can get rid of the sulfur directly, and also reduce the SO2 material in the smoke greatly.



Nowadays, the fluidized bed can be used for the burning of various kinds of fuels, suitable for the co-firing of biomass and coals. The sort of fuels and also their percentage is adjustable, so you can pick them according the price to decrease your cost.



The high price of natural gas is a trouble. And also the price variation in between summer and winter season is buckling down. Biomass is a superb alternative to standard fuels. To meet the environmental need as well as attain higher economical advantages, it is very important to improve the application innovation of biomass gas, as well as increase the percentage of biomass in power mix.


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