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Why is biomass a better alternative to natural gas
Why is biomass a better choice to natural gas?
Competition between biomass fuel and also gas
Over the last few years, the application of biomass fuel is raising. In many places, there arise competitors in between biomass fuels as well as natural gas. In this flow, I will certainly take central heating boiler burning for instance, and compare the tools cost, operation price as well as setting result of biomass central heating boiler and also natural gas central heating boiler.

This blog site compares the economic and ecological impact of biomass fuel as well as natural gas. The devices cost of biomass boiler is greater than that of natural gas central heating boiler. Considering the high cost of gas, the yearly operating cost (consisting of the cost of gas, electricity, labors as well as upkeep) of gas is greater than biomass boiler.

When utilizing biomass gas, it requires to be furnished with dust collector, sulfur and nitrate eliminating gadget to guarantee the contaminant discharge satisfy the criterion. When it comes to natural gas central heating boiler, it adopts low-nitrogen burning technology or denitrification gadget to ensure the NOx exhaust meet the requirement.

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

According to the various sources, the biomass fuels can be classified right into 6 kinds: crop straw, forestry waste, pet dung, marine plants, energy plants, life waste.

Biomass power has the adhering to benefits
Low cost, wide distribution, large volume, renewability, storable, easy to use.

Biomass power also has some downsides:
Low power thickness, not appropriate for long-distance transport. To ensure the biomass fuel supply, it needs large area for storage, which brings administration problem.
Plant straw has large circulation, however it is affected by areas, periods, climates and also other factors. The supply is not stable. Besides, the calorific worth differs a whole lot. Some are not appropriate for central heating boilers.
Different type of biomass fuels have different combustion results, which might create slagging and also leaves way too much ash. The alkaline web content in the ash will certainly impede the constant work of biomass central heating boiler and trigger corrosion.
Biomass gas are simple to get damp. The moisture web content have excellent result on the combustion temperature level. Over-high moisture web content will certainly make the biomass fuel incapable to shed.

Cost-effective result
Equipment cost
Take a 4t/h heavy steam boiler for example. The data processor of a DZL horizontal biomass boiler expenses around ￥ 180,000, the price of complementary equipment as well as installation is around ￥ 65,000, so the overall devices price is ￥ 245,000.

A WNS series natural gas central heating boiler expenses around ￥ 150,000, the price of auxiliary machinery as well as installment is ￥ 55,000, so the complete devices expense is ￥ 205,000. As a result, the equipment price of biomass boiler is higher than that of natural gas boiler

biomass gas boilernatural gas central heating boiler.
Yearly operating expense
We still take a 4t/h heavy steam central heating boiler for example, and contrast the annual procedure expense of biomass fuels and gas central heating boilers. The operation expense of a central heating boiler includes fuels expense, power consumption, labor expense as well as maintenance price

Yearly fuel expense.
As an example:
The heat efficiency of a biomass boiler is 80%.
The calorific worth of biomass fuel is 17.58 MJ/kg at the very least.
The expense of wood pellets is ￥ 1250/t.
A biomass central heating boiler eat 717kg timber pellet per hr.
The boiler runs for 10 hours day-to-day.
The yearly running time is 300days.
By computation, the annual gas cost is ￥ 2,688,800.

Annual electrical charge.
As an example:.
The overall power of a pressure and also generate draft fun is 29.5 kw.
The complete power of the decrease box, feeder, water pump as well as conveyor is 10kw.
Then the complete power of the biomass central heating boiler is 39.5 kw.
The electricity rate is ￥ 1.0/ kwh,.
The daily running time is 10 hrs.
The yearly operating days are 300 days.
Then the electrical fee for a year is ￥ 118,500.

Annual labor expense.
As an example:.
The job has two shifts a day.
Each shifts require 2 individual. A firefighter as well as a water driver.
The wage is ￥ 3000 per person.
The labor cost is 144,000 per year.

Yearly maintenance price.
Biomass central heating boiler normally has many supporting equipment. flat die pellet machine is more than gas boiler. navigate to this site remains in percentage to the equipment cost. If the upkeep cost is 2.5% of the equipment expense, then it is ￥ 6100 annually.

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

Natural gas boiler.
Yearly fuel price.
For instance.
The warmth performance of biomass central heating boiler is 90%.
The calorific worth of gas is 35.58 MJ/kg.
The price of gas is ￥ 3.1/ m3.
A gas boiler can take in 315m3 natural gas every hour.
A gas central heating boiler runs 10 hrs day-to-day, 300 days annually.
By estimation, the yearly gas cost is ￥ 2,929,500.

Yearly electric cost.
The power of the burner is 7.5 kw.
The power of water pump as well as various other power utilization devices is 7kw.
So the overall electric power of the biomass central heating boiler is 14.5 kw.
The electrical energy rate is ￥ 1.0/ kwh.
The working time is 10 hours every day, 300 days annually.
So the yearly electrical power cost is ￥ 43500.

Annual labor expense.
The job has 2 changes a day.
As the gas boiler has greater automation, as well as the operation is basic, it needs just 1 fireman.
The salary is ￥ 3000 monthly, so the yearly labor expense is ￥ 72000.

Yearly maintenance cost.
The upkeep job of a gas boiler is not much, the expense is reduced.
Suppose the upkeep cost is 1% of the equipment expense, then it is ￥ 2100 every year.
By estimation, the yearly running cost of a biomass boiler is ￥ 3,047,100.

Verdict.
In regards to the equipment price, biomass boiler is more than natural gas central heating boiler. In terms of the annual running price, as gas central heating boiler has higher automation level, requires much less power consumption tool, and also much less maintenance, the electrical charge, labor cost and also maintenance expense is lower than that of biomass boiler. Yet taking into consideration the high cost of natural gas, the complete operation price of natural gas boiler is greater than that of biomass central heating boiler.

Ecological result.
Biomass gas.
Scientist measured the emission of smoke, SO2 and also NOx in 2 biomass central heating boiler.

These 2 central heating boilers has comparable dissipation ability. Both of them are not furnished with sulfur as well as nitrate eliminating tool. Yet the first one is furnished with a bag-type dirt enthusiast, and also the second one is outfitted with a film-type dirt enthusiast.


The boiler furnished with film-type dirt collector can minimize the ash exhaust properly. In regards to SO2 exhaust, the timber pellets can fulfill the stipulated criterion also without sulfur getting rid of device. As for NOx discharge, the wood pellets can satisfy the standard in boilers geared up with film-type dust enthusiast.

Natural gas.
Gas is an excellent quality and tidy gas fuel. The fostering of gas in the central heating boiler can reduce the air contamination extremely. The ash, sulfur and also nitrogen web content in the gas is low. The smoke of natural gas has little SOx, which a meet specified criterion. But the NOx exhaust is still a trouble. Looked into discovered the NOx emission of natural gas central heating boiler is 125mg/m3, and 25% of them is greater than 150mg/m3.

Conclusion.
According to the evaluation over, the type of biomass gas has fantastic impact on the toxin emission. Timber pellets has much less SO2 emission than straw pellets. The biomass boiler with film-type dust collection agency has better ash getting rid of effect than bag-type dust collection agency.

The NOx emission is beyond criterion in biomass central heating boilers without sulfur or nitrate getting rid of device, whatever wood pellets or straw pellets. Therefore, it is suggest to outfit reliable dust collector, as well as sulfur and also nitrate eliminating gadget.

Natural gas has advantages in cutting smoke and also SO2 emission. But with the boosting exhaust criterion, more gas central heating boilers will take on low-nitrogen combustion technology and also nitrate eliminating tool.

The corresponding advantages of gas as well as biomass gas.
The rate of biomass boiler is greater than natural gas. Their operating expense is similar taking into consideration the increase of gas cost. Besides, the natural gas boiler is less complicated to regulate, and it does not take much floor space or fuel storeroom.

The cost of gas is under government control, so it will not fluctuate greatly. The natural gas supply can be ensured when the gas boiler is in usage. Biomass pellets supply is limited by seasons. The price and also supply is unsteady, which usually occupies huge storehouse room.

In regards to environmental protection, biomass boilers have to be equipped with dirt collection agency, sulfur as well as nitrate eliminating device to guarantee the smoke, SO2 as well as NOx emission meet the standard. However gas central heating boilers doesn't require dust collection agency or desulfurizer, yet it need to adopt low-nitrogen combustion innovation or nitrate removing gadget to reduce the NOx emission. Besides, the gas central heating boiler does not require dust cleaning process.

Beyond, biomass gas is renewable. It is solar energy transferred in plants by photosynthesis. As statistics show, the biomass power created by photosynthesis is 173 billion heap, however just 3% of them are made use of. Besides, biomass energy is carbon neutral, which suggests the CO2 consumption in its development equates to the exhaust in biomass gas burning.

Fluidized-bed combustion is a modern technology based on gas-solid fluidized state. It has excellent flexibility to biomass gas, the pollutant gas emission is reduced. By including desulfurizer to the fluidized bed, it can get rid of the sulfur directly, and minimize the SO2 material in the smoke sharply.

Nowadays, the fluidized bed can be utilized for the combustion of different sort of fuels, ideal for the co-firing of biomass and also coals. The sort of fuels and their percentage is adjustable, so you can pick them according the price to decrease your expense.

The high cost of natural gas is a trouble. And also the cost variation between summertime as well as wintertime is buckling down. Biomass is an exceptional alternative to traditional fuels. To fulfill the environmental need and achieve greater cost-effective advantages, it is very important to enhance the application technology of biomass gas, and also increase the percentage of biomass in power mix.

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