Notes

Why is biomass a far better choice to natural gas?<br>
Competition in between biomass gas and also gas

In recent years, the application of biomass fuel is boosting. In lots of places, there arise competitors between biomass fuels as well as natural gas. In this passage, I will certainly take boiler burning as an example, as well as compare the tools expense, procedure price and setting result of biomass central heating boiler and also gas central heating boiler.



This blog compares the economic and also ecological effect of biomass fuel and also gas. The tools cost of biomass central heating boiler is higher than that of natural gas boiler. Considering the high cost of gas, the annual operating expense (consisting of the expense of fuel, power, labors and also upkeep) of gas is higher than biomass central heating boiler.



When using biomass fuels, it requires to be equipped with dust collector, sulfur and also nitrate eliminating tool to make sure the pollutant emission meet the standard. As for small fish feed making machine , it takes on low-nitrogen burning innovation or denitrification tool to make certain the NOx emission satisfy the standard.



Evaluation of biomass energy

Biomass power is solar power transferred in biomass products in the form of chemical power. It comes from the photosynthesis of green plants. It has the kind of solid, liquid and gas. Biomass power is referred to as a renewable energy.



According to the different resources, the biomass fuels can be identified into 6 kinds: crop straw, forestry waste, pet dung, aquatic plants, power plants, life trash.



Biomass energy has the adhering to advantages

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



Biomass energy also has some negative aspects:

Low power density, not suitable for long-distance transportation. To guarantee the biomass fuel supply, it requires huge space for storage, which brings monitoring trouble.

Plant straw has large distribution, but it is influenced by regions, periods, climates and also various other elements. The supply is not secure. Besides, the calorific value varies a lot. Some are not suitable for boilers.

Different sort of biomass fuels have various burning impacts, which might cause slagging and leaves way too much ash. The alkaline material in the ash will prevent the continuous job of biomass central heating boiler and also trigger rust.

Biomass gas are very easy to obtain damp. The moisture content have terrific effect on the combustion temperature level. Over-high wetness material will certainly make the biomass fuel not able to burn.



Affordable effect

Equipment cost

Take a 4t/h heavy steam central heating boiler for example. The mainframe of a DZL straight biomass boiler prices around ￥ 180,000, the price of auxiliary machinery as well as installment is around ￥ 65,000, so the complete devices expense is ￥ 245,000.



A WNS collection natural gas boiler costs around ￥ 150,000, the expense of supporting machinery and installment is ￥ 55,000, so the complete devices price is ￥ 205,000. Consequently, the equipment cost of biomass central heating boiler is greater than that of gas boiler



biomass fuel boilernatural gas central heating boiler.

Yearly operating expense

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



Yearly gas cost.

As an example:

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

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

The price of timber pellets is ￥ 1250/t.

A biomass boiler consume 717kg wood pellet per hr.

The central heating boiler competes 10 hrs daily.

The annual running time is 300days.

By estimation, the annual gas expense is ￥ 2,688,800.



Yearly electrical charge.

As an example:.

The complete power of a force as well as induce draft fun is 29.5 kw.

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

Then the overall power of the biomass boiler is 39.5 kw.

The power price is ￥ 1.0/ kwh,.

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

The annual running days are 300 days.

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



Yearly labor expense.

As an example:.

The job has 2 shifts a day.

Each changes require 2 individual. A firefighter and a water operator.

The wage is ￥ 3000 per person.

The labor price is 144,000 per year.



Annual maintenance expense.

Biomass boiler normally has several auxiliary machinery. Their failure rate is higher than gas central heating boiler. The yearly maintenance price is in proportion to the equipment expense. If the upkeep price is 2.5% of the equipment price, after that it is ￥ 6100 yearly.



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



Natural gas boiler.

Yearly gas cost.

As an example.

The warmth performance of biomass boiler is 90%.

The calorific value of gas is 35.58 MJ/kg.

The cost of natural gas is ￥ 3.1/ m3.

A gas boiler can consume 315m3 natural gas every hr.

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

By computation, the annual fuel expense is ￥ 2,929,500.



Annual electric fee.

The power of the burner is 7.5 kw.

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

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

The electricity rate is ￥ 1.0/ kwh.

The functioning time is 10 hours daily, 300 days every year.

So the annual power price is ￥ 43500.



Annual labor price.

The job has 2 changes a day.


As the gas boiler has greater automation, as well as the procedure is easy, it needs only 1 fireman.

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



Annual upkeep expense.

The upkeep work of a gas boiler is very little, the expense is low.

Intend the maintenance expense is 1% of the devices cost, then it is ￥ 2100 annually.

By estimation, the annual running expense of a biomass boiler is ￥ 3,047,100.



Verdict.

In terms of the equipment price, biomass central heating boiler is more than natural gas central heating boiler. In regards to the yearly running expense, as gas central heating boiler has greater automation degree, requires less power usage device, and less upkeep, the electric cost, labor cost and maintenance price is lower than that of biomass central heating boiler. Yet taking into consideration the high price of natural gas, the overall operation price of gas boiler is more than that of biomass central heating boiler.



Ecological impact.

Biomass fuel.

Scientist determined the discharge of smoke, SO2 and NOx in 2 biomass central heating boiler.



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



The boiler geared up with film-type dirt collection agency can decrease the ash emission effectively. In regards to SO2 discharge, the timber pellets can satisfy the specified requirement even without sulfur eliminating device. As for NOx exhaust, the timber pellets can meet the requirement in central heating boilers geared up with film-type dirt collection agency.



Gas.

Natural gas is an excellent quality as well as 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 reduced. The smoke of natural gas has little SOx, which a meet specified criterion. However the NOx exhaust is still an issue. Investigated located the NOx exhaust of natural gas central heating boiler is 125mg/m3, and 25% of them is more than 150mg/m3.



Conclusion.

According to the evaluation over, the kind of biomass gas has terrific influence on the toxin exhaust. Timber pellets has less SO2 exhaust than straw pellets. The biomass boiler with film-type dust enthusiast has much better ash removing result than bag-type dust collector.



The NOx discharge is past requirement in biomass boilers without sulfur or nitrate removing tool, whatever timber pellets or straw pellets. As a result, it is suggest to furnish effective dirt collection agency, as well as sulfur and also nitrate removing device.



Natural gas has advantages in reducing smoke as well as SO2 emission. Yet with the raising exhaust standard, more gas boilers will certainly take on low-nitrogen burning innovation and also nitrate removing device.



The particular benefits of natural gas and also biomass fuel.

The rate of biomass boiler is higher than gas. Their operating cost is similar taking into consideration the surge of natural gas price. Besides, the gas boiler is easier to control, and it doesn't take much floor area or gas storeroom.



The price of natural gas is under federal government control, so it will not rise and fall sharply. The gas supply can be guaranteed when the gas central heating boiler remains in use. Biomass pellets supply is restricted by periods. The cost and supply is unstable, which generally occupies big stockroom room.



In regards to environmental protection, biomass central heating boilers need to be outfitted with dust enthusiast, sulfur and nitrate eliminating device to ensure the smoke, SO2 and also NOx emission meet the standard. Yet natural gas boilers doesn't require dust collector or desulfurizer, however it need to embrace low-nitrogen burning innovation or nitrate eliminating gadget to cut the NOx discharge. Besides, the gas boiler doesn't require dirt cleansing process.




Beyond, biomass fuel is eco-friendly. mini poultry feed machine is solar power deposited in plants by photosynthesis. As stats show, the biomass power created by photosynthesis is 173 billion lot, however only 3% of them are utilized. Besides, biomass power is carbon neutral, which indicates the carbon dioxide consumption in its growth equals the exhaust in biomass fuel burning.



Fluidized-bed combustion is an innovation based on gas-solid fluidized state. It has great adaptability to biomass gas, the toxin gas exhaust is low. By including desulfurizer to the fluidized bed, it can eliminate the sulfur straight, and decrease the SO2 web content in the smoke dramatically.



Nowadays, the fluidized bed can be made use of for the burning of various sort of gas, appropriate for the co-firing of biomass and coals. The sort of gas and also their percentage is flexible, so you can pick them according the cost to decrease your cost.



The high cost of natural gas is an issue. And flat die pellet mill for sale between summertime as well as wintertime is buckling down. Biomass is a superb alternative to standard fuels. To fulfill the ecological need as well as accomplish higher affordable benefits, it is essential to boost the application innovation of biomass gas, as well as enhance the percentage of biomass in energy mix.


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