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Why is biomass a better alternative to natural gas
Why is biomass a far better choice to natural gas?
Competition between biomass gas and also natural gas
Recently, the application of biomass gas is raising. In numerous places, there occur competitors in between biomass gas and also gas. In this passage, I will take boiler burning as an example, and compare the equipment price, operation cost as well as environment impact of biomass boiler as well as natural gas boiler.

This blog site contrasts the financial and environmental effect of biomass gas and natural gas. The equipment price of biomass boiler is higher than that of gas central heating boiler. Taking into consideration the high rate of natural gas, the annual operating expense (consisting of the expense of gas, electrical energy, labors as well as maintenance) of gas is more than biomass central heating boiler.

When utilizing biomass gas, it requires to be geared up with dirt collection agency, sulfur as well as nitrate removing device to guarantee the contaminant discharge satisfy the criterion. As for natural gas boiler, it adopts low-nitrogen burning technology or denitrification gadget to make certain the NOx emission meet the standard.

Evaluation of biomass power
Biomass energy is solar energy transferred in biomass materials in the form of chemical power. It originates from the photosynthesis of environment-friendly plants. It has the form of solid, liquid as well as gas. Biomass energy is called a renewable energy.

According to grass pellet mill , the biomass fuels can be categorized right into 6 kinds: crop straw, forestry waste, animal dung, water plants, energy plants, life garbage.

Biomass power has the complying with advantages

Affordable, vast distribution, big quantity, renewability, storable, easy to use.

Biomass energy also has some disadvantages:
Low power density, not ideal for long-distance transport. To make sure the biomass gas supply, it calls for huge room for storage space, which brings management issue.
Crop straw has wide distribution, but it is influenced by regions, periods, weathers and also various other aspects. The supply is not stable. Besides, the calorific value varies a great deal. Some are not appropriate for central heating boilers.
Different sort of biomass gas have different combustion results, which may cause slagging as well as leaves way too much ash. The alkaline material in the ash will certainly hinder the continuous job of biomass boiler and cause corrosion.
Biomass gas are simple to get damp. The wetness material have terrific result on the burning temperature. Over-high dampness material will make the biomass gas unable to burn.

Affordable impact
Devices expense
Take a 4t/h steam central heating boiler as an example. The mainframe of a DZL straight biomass boiler expenses around ￥ 180,000, the cost of supporting machinery as well as installment is around ￥ 65,000, so the overall tools expense is ￥ 245,000.

A WNS collection natural gas central heating boiler expenses around ￥ 150,000, the expense of complementary machinery and also installment is ￥ 55,000, so the overall equipment expense is ￥ 205,000. Therefore, the tools expense of biomass central heating boiler is greater than that of gas central heating boiler

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

Annual gas price.
For instance:
The warmth performance of a biomass central heating boiler is 80%.
The calorific value of biomass fuel is 17.58 MJ/kg a minimum of.
The cost of timber pellets is ￥ 1250/t.
A biomass boiler eat 717kg wood pellet per hour.
The boiler competes 10 hours daily.
The yearly running time is 300days.
By estimation, the yearly fuel expense is ￥ 2,688,800.

Yearly electric cost.
For example:.
The total power of a pressure and cause draft fun is 29.5 kw.
The complete power of the decrease box, feeder, water pump and conveyor is 10kw.
After that the total power of the biomass boiler is 39.5 kw.
The electrical power price is ￥ 1.0/ kwh,.
The everyday running time is 10 hours.
The annual operating days are 300 days.
Then the electric cost for a year is ￥ 118,500.

Yearly labor cost.
As an example:.
The job has two changes a day.
Each shifts need 2 person. A fire fighter as well as a water driver.
The salary is ￥ 3000 per person.
The labor cost is 144,000 per year.

Yearly upkeep expense.
Biomass central heating boiler generally has numerous supporting machinery. Their failure price is higher than gas boiler. The annual maintenance price is in percentage to the equipment expense. If the upkeep cost is 2.5% of the devices price, then it is ￥ 6100 every year.

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

Gas boiler.
Annual gas expense.
For instance.
The warmth effectiveness of biomass central heating boiler is 90%.
The calorific worth of gas is 35.58 MJ/kg.

The rate of gas is ￥ 3.1/ m3.
A gas boiler can take in 315m3 natural gas every hour.
A gas central heating boiler operates 10 hours everyday, 300 days every year.
By calculation, the yearly gas price is ￥ 2,929,500.

Yearly electric cost.
The power of the heater is 7.5 kw.
The power of water pump as well as various other power application devices is 7kw.
So the total electric power of the biomass boiler is 14.5 kw.
The electrical energy price is ￥ 1.0/ kwh.
The working time is 10 hours daily, 300 days annually.
So the yearly electrical power expense is ￥ 43500.

Annual labor expense.
The job has 2 changes a day.
As the gas boiler has higher automation, and also the operation is basic, it calls for only 1 fire fighter.
The income is ￥ 3000 each month, so the yearly labor expense is ￥ 72000.

Yearly upkeep price.
The maintenance work of a gas central heating boiler is very little, the price is reduced.
Mean the maintenance cost is 1% of the devices expense, after that it is ￥ 2100 annually.
By calculation, the yearly running cost of a biomass central heating boiler is ￥ 3,047,100.

Final thought.
In regards to the devices price, biomass central heating boiler is higher than natural gas central heating boiler. In regards to the annual running price, as natural gas central heating boiler has higher automation level, calls for less power consumption gadget, and also much less maintenance, the electrical cost, labor price as well as maintenance cost is lower than that of biomass boiler. But considering the high rate of gas, the complete procedure expense of gas central heating boiler is higher than that of biomass boiler.

Environmental impact.
Biomass gas.
olx pellet machine measured the exhaust of smoke, SO2 and NOx in 2 biomass boiler.

These 2 boilers has similar evaporation capability. Both of them are not furnished with sulfur as well as nitrate getting rid of gadget. Yet the initial one is outfitted with a bag-type dust collection agency, as well as the 2nd one is geared up with a film-type dirt enthusiast.

The central heating boiler equipped with film-type dust collector can lower the ash emission properly. In regards to SO2 discharge, the timber pellets can fulfill the specified requirement also without sulfur eliminating device. As for NOx exhaust, the wood pellets can satisfy the requirement in boilers geared up with film-type dust collector.

Gas.
Gas is an excellent quality as well as tidy gas fuel. The fostering of natural gas in the central heating boiler can reduce the air contamination remarkably. The ash, sulfur and also nitrogen web content in the gas is low. The smoke of natural gas includes little SOx, which a fulfill stated standard. However the NOx emission is still an issue. Researched found the NOx exhaust of natural gas central heating boiler is 125mg/m3, as well as 25% of them is more than 150mg/m3.

Conclusion.
According to the evaluation over, the type of biomass fuel has wonderful impact on the pollutant exhaust. Wood pellets has less SO2 exhaust than straw pellets. The biomass central heating boiler with film-type dirt enthusiast has much better ash removing result than bag-type dust enthusiast.

The NOx discharge is past requirement in biomass boilers without sulfur or nitrate eliminating gadget, whatever wood pellets or straw pellets. As a result, it is suggest to furnish efficient dirt collection agency, and sulfur and also nitrate removing device.

Natural gas has advantages in cutting smoke as well as SO2 emission. However with the raising discharge requirement, even more natural gas boilers will certainly take on low-nitrogen burning innovation and nitrate eliminating device.

The particular benefits of gas and biomass gas.
The rate of biomass boiler is greater than gas. Their operating cost is similar considering the rise of gas cost. Besides, the natural gas central heating boiler is easier to control, and also it doesn't take much floor area or gas storage room.

The price of gas is under government control, so it will not change dramatically. The natural gas supply can be guaranteed when the gas central heating boiler is in use. Biomass pellets supply is restricted by seasons. The price and supply is unstable, which generally uses up big storage facility area.

In terms of environmental management, biomass boilers have to be furnished with dirt collection agency, sulfur and also nitrate removing tool to guarantee the smoke, SO2 and also NOx discharge satisfy the requirement. Yet natural gas boilers does not need dirt enthusiast or desulfurizer, yet it need to embrace low-nitrogen combustion technology or nitrate removing device to reduce the NOx discharge. Besides, the gas boiler doesn't need dust cleansing process.

Beyond, biomass gas is eco-friendly. It is solar energy deposited in plants by photosynthesis. As data show, the biomass power created by photosynthesis is 173 billion bunch, however only 3% of them are utilized. Besides, biomass power is carbon neutral, which means the CO2 usage in its growth equals the discharge in biomass gas burning.

Fluidized-bed burning is a technology based on gas-solid fluidized state. It has good versatility to biomass gas, the pollutant gas emission is low. By including desulfurizer to the fluidized bed, it can eliminate the sulfur straight, and decrease the SO2 web content in the smoke greatly.

Nowadays, the fluidized bed can be utilized for the burning of various kinds of gas, suitable for the co-firing of biomass and coals. The kind of gas and also their percentage is adjustable, so you can select them according the cost to lower your cost.

The high rate of gas is a problem. And also the rate disparity in between summertime as well as winter months is getting serious. Biomass is an outstanding substitute for standard fuels. To meet the environmental need and also achieve greater economical benefits, it is very important to improve the application innovation of biomass gas, and also raise the proportion of biomass in power mix.


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