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Why is biomass a far better alternative to natural gas?<br>
Competitors between biomass gas and gas

Over the last few years, the application of biomass gas is enhancing. In lots of places, there develop competitions between biomass fuels and also natural gas. In this flow, I will certainly take central heating boiler burning for example, and also compare the devices cost, operation expense and also atmosphere impact of biomass boiler as well as natural gas boiler.



This blog compares the economic and ecological result of biomass gas and natural gas. The devices cost of biomass boiler is more than that of gas central heating boiler. Taking into consideration the high cost of natural gas, the annual operating cost (consisting of the cost of gas, power, labors and also maintenance) of natural gas is more than biomass boiler.



When utilizing biomass fuels, it requires to be outfitted with dirt collection agency, sulfur and also nitrate removing device to guarantee the toxin exhaust fulfill the requirement. As for gas boiler, it adopts low-nitrogen burning innovation or denitrification device to make certain the NOx emission meet the requirement.



Evaluation of biomass energy

Biomass energy is solar power transferred in biomass materials in the form of chemical power. It originates from the photosynthesis of eco-friendly plants. It has the form of strong, liquid and gas. Biomass power is called a renewable energy.



According to the various sources, the biomass fuels can be identified into 6 kinds: crop straw, forestry waste, animal dung, water plants, energy plants, life trash.



Biomass power has the following benefits

Low cost, broad distribution, big quantity, renewability, storable, easy to use.



Biomass power additionally has some drawbacks:

Reduced power thickness, not appropriate for long-distance transportation. To make sure the biomass fuel supply, it calls for huge area for storage, which brings monitoring trouble.

Crop straw has broad circulation, however it is influenced by regions, periods, weather conditions as well as other elements. The supply is not stable. Besides, the calorific value varies a lot. Some are not suitable for boilers.

Various type of biomass fuels have different burning impacts, which might cause slagging and leaves too much ash. The alkaline content in the ash will hinder the continuous work of biomass central heating boiler and cause corrosion.

Biomass fuels are easy to get damp. The wetness material have wonderful result on the combustion temperature. Over-high dampness content will make the biomass gas not able to melt.



Economical effect

Tools cost

Take a 4t/h heavy steam boiler for instance. The mainframe of a DZL straight biomass central heating boiler costs around ￥ 180,000, the price of complementary machinery and also installation is around ￥ 65,000, so the complete equipment cost is ￥ 245,000.



A WNS collection gas boiler expenses around ￥ 150,000, the cost of supporting equipment and installment is ￥ 55,000, so the overall devices price is ￥ 205,000. As a result, the tools cost of biomass central heating boiler is more than that of natural gas central heating boiler



biomass fuel boilernatural gas boiler.

Yearly operating expense

We still take a 4t/h steam central heating boiler for instance, and contrast the annual procedure expense of biomass fuels and also gas boilers. The procedure cost of a central heating boiler includes gas expense, electricity consumption, labor price and also upkeep expense



Annual fuel price.

For instance:

The heat effectiveness of a biomass central heating boiler is 80%.

The calorific worth of biomass fuel is 17.58 MJ/kg at least.

The cost of wood pellets is ￥ 1250/t.

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

The boiler competes 10 hours daily.

The yearly running time is 300days.

By calculation, the yearly fuel price is ￥ 2,688,800.



Annual electric cost.

For instance:.

The complete power of a pressure as well as induce draft enjoyable is 29.5 kw.

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


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

The electrical power cost is ￥ 1.0/ kwh,.

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

The annual running days are 300 days.

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



Annual labor cost.

For instance:.

The work has 2 changes a day.

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

The salary is ￥ 3000 per person.

The labor cost is 144,000 annually.



Yearly maintenance price.

Biomass central heating boiler typically has many complementary equipment. Their failure rate is greater than gas boiler. The yearly upkeep price remains in proportion to the equipment cost. If the upkeep expense is 2.5% of the tools price, after that it is ￥ 6100 yearly.



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



Gas central heating boiler.

Annual gas expense.

As an example.

The warmth effectiveness of biomass boiler is 90%.

The calorific worth of natural gas is 35.58 MJ/kg.

The price of gas is ￥ 3.1/ m3.

A gas central heating boiler can consume 315m3 gas every hr.

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

By calculation, the annual fuel cost is ￥ 2,929,500.



Annual electrical cost.

The power of the burner is 7.5 kw.

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

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

The power rate is ￥ 1.0/ kwh.

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

So the annual power price is ￥ 43500.



Yearly labor expense.

The work has 2 shifts a day.

As the gas central heating boiler has greater automation, as well as the operation is simple, it needs just 1 fire fighter.

The income is ￥ 3000 monthly, so the annual labor expense is ￥ 72000.



Yearly upkeep expense.

The maintenance job of a gas boiler is not much, the expense is low.

Suppose the maintenance cost is 1% of the devices expense, then it is ￥ 2100 every year.

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



Conclusion.

In regards to the devices price, biomass central heating boiler is greater than gas boiler. In regards to the yearly running expense, as gas boiler has greater automation degree, calls for much less power intake gadget, and also much less upkeep, the electric cost, labor cost as well as upkeep expense is less than that of biomass central heating boiler. However taking into consideration the high price of gas, the complete procedure expense of gas central heating boiler is greater than that of biomass central heating boiler.



Environmental impact.

Biomass gas.

Scientist determined the exhaust of smoke, SO2 and also NOx in 2 biomass boiler.



These 2 central heating boilers has comparable evaporation capacity. Both of them are not geared up with sulfur as well as nitrate eliminating tool. But the initial one is equipped with a bag-type dust collection agency, and also the 2nd one is geared up with a film-type dust collector.



The boiler furnished with film-type dirt collector can reduce the ash emission properly. In regards to SO2 emission, the wood pellets can meet the stated requirement even without sulfur removing device. As for NOx discharge, the timber pellets can meet the standard in central heating boilers outfitted with film-type dirt enthusiast.



Natural gas.

Natural gas is a top quality and clean gas fuel. The fostering of natural gas in the boiler can lower the air pollution incredibly. The ash, sulfur and nitrogen content in the natural gas is reduced. The smoke of gas includes little SOx, which a meet specified criterion. But the NOx discharge is still a problem. Researched discovered the NOx exhaust of natural gas central heating boiler is 125mg/m3, and also 25% of them is more than 150mg/m3.



Conclusion.

According to the evaluation above, the sort of biomass gas has great influence on the toxin emission. Timber pellets has much less SO2 discharge than straw pellets. The biomass central heating boiler with film-type dust collector has far better ash getting rid of result than bag-type dust enthusiast.



The NOx emission is beyond criterion in biomass central heating boilers without sulfur or nitrate getting rid of gadget, whatever wood pellets or straw pellets. Consequently, press pellet is recommend to furnish efficient dirt collection agency, and also sulfur and nitrate getting rid of gadget.



Gas has advantages in cutting smoke and also SO2 emission. However with the raising discharge criterion, more gas central heating boilers will certainly take on low-nitrogen burning modern technology and nitrate eliminating gadget.



The respective benefits of natural gas and also biomass gas.

The rate of biomass central heating boiler is higher than natural gas. Their operating cost is similar taking into consideration the increase of gas cost. Besides, the natural gas central heating boiler is much easier to regulate, as well as it does not take much floor room or fuel storeroom.



The rate of gas is under federal government control, so it will not fluctuate dramatically. The gas supply can be assured when the gas central heating boiler is in usage. Biomass pellets supply is restricted by seasons. The cost as well as supply is unpredictable, which normally occupies huge stockroom space.



In regards to environmental protection, biomass central heating boilers need to be furnished with dust enthusiast, sulfur and also nitrate removing tool to make certain the smoke, SO2 and also NOx emission meet the criterion. Yet natural gas central heating boilers does not need dirt collection agency or desulfurizer, yet it need to take on low-nitrogen burning technology or nitrate eliminating tool to reduce the NOx discharge. Besides, the natural gas boiler does not need dirt cleansing procedure.



Beyond, biomass gas is sustainable. It is solar power deposited in plants by photosynthesis. As stats show, the biomass power created by photosynthesis is 173 billion heap, but just 3% of them are used. Besides, biomass energy is carbon neutral, which implies the carbon dioxide consumption in its growth amounts to the discharge in biomass gas burning.



Fluidized-bed burning is an innovation based on gas-solid fluidized state. It has excellent versatility to biomass gas, the contaminant gas exhaust is reduced. By adding desulfurizer to the fluidized bed, it can get rid of the sulfur directly, and also lower the SO2 web content in the smoke sharply.



Nowadays, the fluidized bed can be made use of for the combustion of various type of gas, ideal for the co-firing of biomass and coals. The sort of gas and also their percentage is flexible, so you can choose them according the rate to lower your price.



The high rate of natural gas is a trouble. And also household manual animal feed pellet machine in between summertime as well as winter season is getting serious. Biomass is an excellent alternative to conventional fuels. To satisfy the ecological demand as well as achieve greater affordable advantages, it is very important to enhance the application modern technology of biomass gas, and also boost the percentage of biomass in energy mix.

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