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Why is biomass a much better alternative to natural gas?<br>
Competition between biomass gas as well as gas

Recently, the application of biomass gas is boosting. In several locations, there emerge competitors in between biomass fuels as well as natural gas. In this passage, I will take central heating boiler burning as an example, as well as contrast the devices price, procedure expense as well as setting impact of biomass boiler as well as natural gas central heating boiler.



This blog compares the financial as well as environmental effect of biomass gas and also gas. The equipment expense of biomass boiler is more than that of natural gas central heating boiler. Thinking about the high rate of gas, the yearly operating expense (consisting of the cost of gas, electrical power, labors as well as maintenance) of gas is higher than biomass boiler.



When utilizing biomass gas, it calls for to be furnished with dirt enthusiast, sulfur as well as nitrate getting rid of tool to make sure the contaminant emission satisfy the requirement. As for natural gas central heating boiler, it embraces low-nitrogen combustion modern technology or denitrification tool to make certain the NOx emission satisfy the requirement.



Analysis of biomass energy

Biomass energy is solar energy deposited in biomass products in the form of chemical power. It originates from the photosynthesis of environment-friendly plants. It has the kind of strong, liquid as well as gas. Biomass power is known as a renewable energy.



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



Biomass power has the adhering to advantages

Inexpensive, large distribution, big volume, renewability, storable, easy to use.



Biomass energy likewise has some downsides:

Low power density, not appropriate for long-distance transport. To guarantee the biomass gas supply, it requires big space for storage space, which brings administration trouble.

Crop straw has vast distribution, however it is impacted by areas, periods, weathers and various other factors. The supply is not stable. Besides, the calorific value varies a whole lot. Some are not ideal for central heating boilers.

Different type of biomass gas have various burning results, which may cause slagging and also leaves too much ash. The alkaline web content in the ash will certainly prevent the continual work of biomass boiler as well as create corrosion.

Biomass fuels are very easy to obtain damp. The moisture content have wonderful impact on the combustion temperature. Over-high wetness web content will make the biomass fuel incapable to burn.



Cost-effective result

Equipment price

Take a 4t/h steam central heating boiler for instance. The mainframe of a DZL horizontal biomass boiler prices around ￥ 180,000, the price of auxiliary equipment as well as setup is around ￥ 65,000, so the overall equipment price is ￥ 245,000.



A WNS series natural gas central heating boiler costs around ￥ 150,000, the price of complementary machinery and also installation is ￥ 55,000, so the complete devices cost is ￥ 205,000. For that reason, the devices price of biomass boiler is greater than that of gas boiler



biomass gas boilernatural gas boiler.

Yearly operating expense

We still take a 4t/h steam central heating boiler for example, and also contrast the yearly procedure expense of biomass fuels as well as natural gas central heating boilers. The procedure price of a central heating boiler consists of fuels cost, electricity intake, labor price and also upkeep cost



Yearly fuel expense.

For example:

The heat effectiveness of a biomass boiler is 80%.

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

The price of wood pellets is ￥ 1250/t.

A biomass boiler take in 717kg timber pellet per hr.

The boiler runs for 10 hours everyday.

The yearly running time is 300days.

By calculation, the annual gas cost is ￥ 2,688,800.



Yearly electric fee.

For example:.

The overall power of a pressure and cause draft enjoyable is 29.5 kw.

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

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

The power price is ￥ 1.0/ kwh,.

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

The annual running days are 300 days.


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



Annual labor expense.

For instance:.

The job has two shifts a day.

Each shifts need 2 individual. fish feed making machine price and also a water operator.

The income is ￥ 3000 per person.

The labor price is 144,000 annually.



Annual upkeep price.

Biomass central heating boiler normally has lots of auxiliary equipment. Their failing rate is more than gas boiler. The annual upkeep cost remains in proportion to the devices expense. If the upkeep expense is 2.5% of the devices cost, then it is ￥ 6100 each year.



By estimation, the yearly running expense of biomass boiler is ￥ 2,957,400.



Natural gas boiler.

Yearly gas price.

For example.

The heat effectiveness of biomass central heating boiler is 90%.

The calorific value of gas is 35.58 MJ/kg.

The rate of natural gas is ￥ 3.1/ m3.

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

A gas boiler operates 10 hours everyday, 300 days yearly.

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



Annual electrical fee.

The power of the burner is 7.5 kw.

The power of water pump and also other power usage devices is 7kw.

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

The electrical energy cost is ￥ 1.0/ kwh.

The working time is 10 hours daily, 300 days each year.

So the annual electricity cost is ￥ 43500.



Annual labor cost.

The job has 2 changes a day.

As the gas central heating boiler has greater automation, and also the operation is basic, it requires just 1 fireman.

The salary is ￥ 3000 each month, so the yearly labor expense is ￥ 72000.



Annual maintenance price.

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

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

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



Conclusion.

In terms of the equipment expense, biomass central heating boiler is higher than gas boiler. In regards to the annual running expense, as gas boiler has greater automation degree, needs less power intake gadget, as well as less maintenance, the electric fee, labor expense and also maintenance cost is less than that of biomass boiler. Yet considering the high price of natural gas, the complete operation cost of natural gas boiler is more than that of biomass central heating boiler.



Environmental effect.

Biomass fuel.

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



These 2 central heating boilers has similar dissipation ability. Both of them are not furnished with sulfur and also nitrate eliminating tool. However the initial one is furnished with a bag-type dirt enthusiast, and also the 2nd one is furnished with a film-type dirt enthusiast.



The central heating boiler equipped with film-type dirt enthusiast can decrease the ash discharge effectively. In terms of SO2 exhaust, the wood pellets can satisfy the specified standard also without sulfur eliminating device. As for NOx discharge, the timber pellets can fulfill the requirement in boilers equipped with film-type dust collection agency.



Natural gas.

Gas is an excellent quality and tidy gas fuel. The adoption of gas in the central heating boiler can reduce the air pollution incredibly. The ash, sulfur as well as nitrogen web content in the gas is low. The smoke of gas contains little SOx, which a satisfy specified standard. But the NOx exhaust is still an issue. Researched located the NOx exhaust of natural gas central heating boiler is 125mg/m3, as well as 25% of them is more than 150mg/m3.



Final thought.

According to the analysis above, the type of biomass fuel has terrific influence on the toxin discharge. Timber pellets has much less SO2 emission than straw pellets. The biomass central heating boiler with film-type dirt collector has far better ash removing impact than bag-type dust enthusiast.



The NOx exhaust is past standard in biomass boilers without sulfur or nitrate getting rid of device, whatever timber pellets or straw pellets. Therefore, it is recommend to equip efficient dirt enthusiast, and sulfur and nitrate getting rid of gadget.



Natural gas has advantages in reducing smoke and also SO2 exhaust. However with the boosting exhaust requirement, even more natural gas central heating boilers will adopt low-nitrogen combustion innovation as well as nitrate eliminating gadget.



The respective advantages of natural gas as well as biomass fuel.

The rate of biomass central heating boiler is higher than gas. Their operating cost is comparable taking into consideration the rise of natural gas price. Besides, the gas central heating boiler is less complicated to manage, as well as it does not take much floor area or fuel storage room.



The rate of gas is under federal government control, so it won't change dramatically. The natural gas supply can be guaranteed when the gas central heating boiler is in usage. Biomass pellets supply is limited by seasons. The cost as well as supply is unpredictable, which generally occupies huge storage facility area.



In terms of environmental management, biomass boilers have to be outfitted with dirt enthusiast, sulfur as well as nitrate eliminating gadget to ensure the smoke, SO2 as well as NOx exhaust fulfill the requirement. Yet gas boilers doesn't require dust collection agency or desulfurizer, yet it need to adopt low-nitrogen combustion modern technology or nitrate eliminating tool to reduce the NOx discharge. Besides, the gas boiler does not require dirt cleaning procedure.



On the other side, biomass fuel is sustainable. It is solar power deposited in plants by photosynthesis. As statistics show, the biomass power generated by photosynthesis is 173 billion bunch, yet just 3% of them are made use of. Besides, egri pellet machine is carbon neutral, which suggests the carbon dioxide usage in its growth equals the emission in biomass fuel burning.



Fluidized-bed burning is a technology based on gas-solid fluidized state. It has excellent flexibility to biomass gas, the pollutant gas exhaust is reduced. By adding desulfurizer to the fluidized bed, it can eliminate the sulfur straight, and also lower the SO2 content in the smoke greatly.



Nowadays, the fluidized bed can be used for the combustion of different type of gas, appropriate for the co-firing of biomass and also coals. The type of fuels and their percentage is adjustable, so you can pick them according the price to lower your expense.



The high cost of gas is a trouble. As well as the price disparity in between summer as well as wintertime is buckling down. Biomass is an outstanding alternative to standard fuels. To meet the environmental requirement and accomplish greater economical advantages, it is necessary to improve the application innovation of biomass fuel, as well as boost the percentage of biomass in power mix.

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