In recent years, the application of biomass gas is raising. In numerous areas, there occur competitions in between biomass fuels and gas. In this flow, I will take boiler burning as an example, and also contrast the equipment price, operation cost and also environment effect of biomass central heating boiler as well as natural gas central heating boiler.
This blog site compares the economic as well as environmental result of biomass gas and gas. The equipment cost of biomass boiler is more than that of gas central heating boiler. Taking into consideration the high price of gas, the yearly operating cost (including the price of gas, electricity, labors and upkeep) of gas is more than biomass central heating boiler.
When utilizing biomass fuels, it calls for to be outfitted with dust collection agency, sulfur as well as nitrate eliminating tool to guarantee the contaminant discharge meet the criterion. When it comes to natural gas boiler, it takes on low-nitrogen burning innovation or denitrification tool to make sure the NOx emission fulfill the requirement.
Analysis of biomass power
Biomass energy is solar energy transferred in biomass products in the form of chemical energy. It originates from the photosynthesis of environment-friendly plants. It has the type of solid, liquid and also gas. Biomass power is called a renewable energy.
According to the various resources, the biomass fuels can be categorized into 6 kinds: crop straw, forestry waste, animal dung, water plants, power plants, life waste.
Biomass energy has the adhering to benefits
Inexpensive, large distribution, huge volume, renewability, storable, easy to use.
Biomass energy likewise has some disadvantages:
Reduced power thickness, not ideal for long-distance transportation. To make sure the biomass fuel supply, it needs big area for storage, which brings management problem.
Plant straw has vast circulation, but it is influenced by areas, seasons, weathers and other variables. The supply is not secure. Besides, the calorific worth varies a whole lot. Some are not ideal for boilers.
Various kinds of biomass gas have different combustion effects, which might create slagging and also leaves too much ash. The alkaline material in the ash will certainly impede the constant work of biomass central heating boiler as well as trigger corrosion.
Biomass gas are simple to obtain damp. The dampness content have wonderful effect on the burning temperature level. Over-high moisture content will certainly make the biomass fuel not able to burn.
Affordable result
Equipment price
Take a 4t/h steam boiler for example. The mainframe of a DZL straight biomass central heating boiler expenses around 180,000, the cost of complementary equipment and also installment is around 65,000, so the total equipment price is 245,000.
A WNS series natural gas central heating boiler expenses around 150,000, the price of supporting equipment as well as installation is 55,000, so the total equipment cost is 205,000. For that reason, the tools expense of biomass central heating boiler is more than that of gas central heating boiler
biomass gas boilernatural gas central heating boiler.
Annual operating cost
We still take a 4t/h vapor boiler as an example, and also compare the yearly operation price of biomass gas as well as natural gas boilers. The procedure cost of a boiler includes gas price, electrical energy intake, labor expense as well as upkeep price
Yearly gas price.
As an example:
The warmth efficiency of a biomass boiler is 80%.
The calorific worth of biomass fuel is 17.58 MJ/kg at the very least.
The cost of timber pellets is 1250/t.
A biomass boiler consume 717kg timber pellet per hr.
The central heating boiler competes 10 hrs everyday.
The yearly running time is 300days.
By calculation, the yearly gas cost is 2,688,800.
Annual electrical cost.
For instance:.
The complete power of a pressure and induce draft enjoyable is 29.5 kw.
The overall power of the decrease 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 rate is 1.0/ kwh,.
The daily running time is 10 hrs.
The yearly running days are 300 days.
Then the electric fee for a year is 118,500.
Annual labor expense.
For example:.
The job has two shifts a day.
Each shifts need 2 person.richi pellet milland also a water driver.
The income is 3000 each.
The labor price is 144,000 each year.
Yearly upkeep cost.
Biomass central heating boiler usually has several auxiliary equipment. Their failing rate is more than gas central heating boiler. The annual upkeep cost is in proportion to the devices cost. If the maintenance price is 2.5% of the devices price, after that it is 6100 yearly.
By calculation, the yearly running price of biomass central heating boiler is 2,957,400.
Natural gas central heating boiler.
Annual gas cost.
For example.
The warmth effectiveness 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 yearly.
By calculation, the annual fuel price 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 usage tools is 7kw.
So the complete electric power of the biomass boiler is 14.5 kw.
The electrical power cost is 1.0/ kwh.
The functioning time is 10 hours every day, 300 days each year.
So the yearly power expense is 43500.
Yearly labor price.
The job has 2 changes a day.
As the gas boiler has higher automation, as well as the procedure is easy, it needs only 1 fireman.
The salary is 3000 per month, so the annual labor cost is 72000.
Annual maintenance expense.
The maintenance job of a gas central heating boiler is very little, the price is low.
Expect the maintenance cost is 1% of the equipment price, after that it is 2100 yearly.
By estimation, the yearly running expense of a biomass central heating boiler is 3,047,100.
Conclusion.
In terms of the equipment cost, biomass central heating boiler is greater than gas boiler. In regards to the yearly running cost, as gas central heating boiler has higher automation degree, calls for less power intake gadget, and much less maintenance, the electric fee, labor price and also maintenance price is lower than that of biomass central heating boiler. However thinking about the high rate of gas, the complete operation expense of gas boiler is more than that of biomass central heating boiler.
Environmental effect.
Biomass gas.
Researchers gauged the emission of smoke, SO2 and NOx in 2 biomass central heating boiler.
These 2 boilers has similar evaporation capacity. Both of them are not geared up with sulfur and nitrate removing gadget. However the very first one is geared up with a bag-type dust collection agency, as well as the second one is geared up with a film-type dust collector.
The central heating boiler furnished with film-type dirt collector can minimize the ash discharge effectively. InRichi machineto SO2 discharge, the wood pellets can fulfill the stated criterion even without sulfur eliminating gadget. When it comes to NOx emission, the wood pellets can fulfill the criterion in central heating boilers geared up with film-type dirt collector.
Gas.
Gas is a premium quality as well as tidy gas fuel. The adoption of gas in the boiler can lower the air pollution remarkably. The ash, sulfur and also nitrogen web content in the gas is reduced. The smoke of natural gas has little SOx, which a meet specified standard. But the NOx emission is still a trouble. Looked into located the NOx exhaust of gas boiler is 125mg/m3, as well as 25% of them is greater than 150mg/m3.
Final thought.
According to the evaluation over, the kind of biomass gas has excellent influence on the pollutant emission. Timber pellets has less SO2 exhaust than straw pellets. The biomass boiler with film-type dirt enthusiast has much better ash getting rid of result than bag-type dust collector.
The NOx exhaust is beyond requirement in biomass boilers without sulfur or nitrate eliminating gadget, whatever timber pellets or straw pellets. For that reason, it is recommend to outfit efficient dirt collection agency, as well as sulfur and nitrate getting rid of tool.
Gas has advantages in reducing smoke and also SO2 exhaust. However with the boosting emission standard, more natural gas central heating boilers will adopt low-nitrogen combustion innovation and also nitrate removing device.
The respective benefits of natural gas and also biomass fuel.
The rate of biomass central heating boiler is higher than natural gas. Their operating cost is comparable considering the increase of gas rate. Besides, the gas central heating boiler is much easier to manage, and it doesn't take much floor space or fuel storage room.
The price of natural gas is under federal government control, so it won't rise and fall dramatically. The gas supply can be assured when the gas boiler remains in use. Biomass pellets supply is limited by seasons. The rate as well as supply is unpredictable, which generally takes up huge storehouse space.
In regards to environmental management, biomass boilers have to be outfitted with dirt enthusiast, sulfur and also nitrate getting rid of tool to make sure the smoke, SO2 and also NOx exhaust fulfill the requirement. But gas boilers doesn't need dust collector or desulfurizer, however it require to take on low-nitrogen burning innovation or nitrate eliminating tool to reduce the NOx exhaust. Besides, the natural gas boiler doesn't require dust cleansing procedure.
On the other side, biomass fuel is eco-friendly.richi pellet millis solar energy deposited in plants by photosynthesis. As statistics show, the biomass energy created by photosynthesis is 173 billion lot, but only 3% of them are used. Besides, biomass power is carbon neutral, which means the carbon dioxide intake in its development equals the emission in biomass gas burning.
Fluidized-bed combustion is a technology based upon gas-solid fluidized state. It has excellent adaptability to biomass fuels, the contaminant gas exhaust is low. By adding desulfurizer to the fluidized bed, it can get rid of the sulfur directly, and lower the SO2 web content in the smoke greatly.
Nowadays, the fluidized bed can be used for the burning of different type of gas, ideal for the co-firing of biomass as well as coals. The kind of gas and their proportion is adjustable, so you can select them according the cost to lower your cost.
The high price of natural gas is a trouble. And also the price difference between summer season and winter season is getting serious. Biomass is an exceptional replacement for conventional gas. To fulfill the ecological need and also achieve higher affordable benefits, it is important to improve the application technology of biomass fuel, and enhance the proportion of biomass in power mix.
