In the last few years, the application of biomass fuel is boosting. In many areas, there develop competitors between biomass fuels and natural gas. In this passage, I will take boiler burning for instance, as well as contrast the equipment cost, operation price and also setting impact of biomass boiler and also natural gas central heating boiler.
This blog contrasts the economic and also ecological result of biomass fuel and also gas. The equipment cost of biomass boiler is higher than that of gas boiler. Considering the high price of gas, the annual operating expense (consisting of the price of gas, power, labors as well as upkeep) of gas is more than biomass boiler.
When utilizing biomass gas, it needs to be furnished with dust enthusiast, sulfur as well as nitrate removing tool to make sure the toxin exhaust fulfill the standard. As for gas boiler, it embraces low-nitrogen combustion innovation or denitrification device to ensure the NOx exhaust fulfill the criterion.
Evaluation of biomass energy
Biomass energy is solar energy deposited in biomass products in the form of chemical energy. It originates from the photosynthesis of eco-friendly plants. It has the kind of strong, fluid and gas. Biomass energy is known as a renewable energy.
According to the different resources, the biomass gas can be categorized right into 6 kinds: plant straw, forestry waste, animal dung, marine plants, energy plants, life rubbish.
Biomass power has the adhering to advantages
Low cost, broad distribution, huge quantity, renewability, storable, easy to use.
Biomass energy also has some negative aspects:
Low energy density, not appropriate for long-distance transportation. To make sure the biomass fuel supply, it needs large area for storage space, which brings administration issue.
Plant straw has large distribution, yet it is affected by regions, periods, weathers and other aspects. The supply is not stable. Besides, the calorific value varies a great deal. Some are not ideal for central heating boilers.
Various type of biomass fuels have various combustion effects, which may cause slagging and leaves excessive ash. The alkaline material in the ash will impede the continuous work of biomass central heating boiler as well as trigger deterioration.
Biomass fuels are simple to get damp. The moisture content have terrific impact on the combustion temperature. Over-high wetness content will make the biomass fuel not able to burn.
Cost-effective effect
Tools expense
Take a 4t/h vapor central heating boiler for instance. The data processor of a DZL horizontal biomass boiler prices around 180,000, the cost of supporting machinery and installment is around 65,000, so the overall devices cost is 245,000.
A WNS collection natural gas boiler costs around 150,000, the cost of auxiliary machinery and installment is 55,000, so the total equipment price is 205,000. Consequently, the devices expense of biomass central heating boiler is higher than that of natural gas central heating boiler
biomass fuel boilernatural gas boiler.
Annual operating expense
We still take a 4t/h vapor central heating boiler for instance, and contrast the yearly procedure price of biomass gas and also gas central heating boilers. The procedure price of a central heating boiler consists of fuels cost, electrical energy intake, labor expense as well as maintenance cost
Annual fuel price.
As an example:
The heat performance of a biomass boiler is 80%.
The calorific value of biomass gas is 17.58 MJ/kg at the very least.
The price of timber pellets is 1250/t.
A biomass central heating boiler eat 717kg timber pellet per hr.
The central heating boiler runs for 10 hrs daily.
The annual running time is 300days.
By computation, the yearly fuel expense is 2,688,800.
Annual electric fee.
As an example:.
The overall power of a force and also cause draft enjoyable is 29.5 kw.
The complete power of the decrease box, feeder, water pump as well as conveyor is 10kw.
Then the overall power of the biomass boiler is 39.5 kw.
The electrical power cost is 1.0/ kwh,.
The everyday running time is 10 hours.
The annual running days are 300 days.
After that the electric fee for a year is 118,500.
Yearly labor price.
For example:.
The job has two changes a day.
Each changes require 2 individual.small fish feed machineand also a water driver.
The salary is 3000 per person.
The labor expense is 144,000 each year.
Annual upkeep cost.
Biomass boiler normally has several supporting machinery. Their failure price is more than gas boiler. The annual maintenance cost is in proportion to the equipment cost. If the maintenance cost is 2.5% of the equipment expense, after that it is 6100 yearly.
By calculation, the yearly running price of biomass central heating boiler is 2,957,400.
Gas central heating boiler.
Yearly gas expense.
As an example.
The heat efficiency of biomass boiler is 90%.
The calorific value of natural gas is 35.58 MJ/kg.
The price of gas is 3.1/ m3.
A gas boiler can take in 315m3 gas every hr.
A gas boiler runs 10 hours daily, 300 days each year.
By calculation, the annual fuel cost is 2,929,500.
Yearly electrical charge.
The power of the burner is 7.5 kw.
The power of water pump and also various other power utilization tools is 7kw.
So the overall electrical power of the biomass central heating boiler is 14.5 kw.
The power rate is 1.0/ kwh.
The working time is 10 hours every day, 300 days every year.
So the yearly electricity expense is 43500.
Yearly labor expense.
The work has 2 shifts a day.
As the gas boiler has greater automation, as well as the operation is easy, it needs just 1 fire fighter.
The wage is 3000 monthly, so the annual labor price is 72000.
Yearly maintenance expense.
The maintenance work of a gas boiler is not much, the expense is low.
Suppose the upkeep cost is 1% of the tools cost, after that it is 2100 each year.
By calculation, the yearly running cost of a biomass central heating boiler is 3,047,100.
Final thought.
In regards to the devices cost, biomass boiler is higher than gas boiler. In terms of the yearly running cost, as natural gas boiler has greater automation level, requires much less power usage device, as well as less maintenance, the electric cost, labor price and upkeep price is less than that of biomass boiler. Yet taking into consideration the high rate of gas, the total operation price of gas boiler is more than that of biomass central heating boiler.
Environmental effect.
Biomass gas.
Researchers measured the discharge of smoke, SO2 and also NOx in 2 biomass central heating boiler.
These 2 boilers has similar evaporation capacity. Both of them are not geared up with sulfur as well as nitrate getting rid of device. However the first one is equipped with a bag-type dust enthusiast, and also the 2nd one is geared up with a film-type dirt enthusiast.
The boiler outfitted with film-type dust collection agency can minimize the ash emission properly. In terms of SO2 discharge, the timber pellets can fulfill the stipulated standard also without sulfur getting rid of device. As for NOx discharge, the timber pellets can meet the standard in central heating boilers equipped with film-type dust enthusiast.
Natural gas.
Natural gas is an excellent quality and also tidy gas fuel. The fostering of natural gas in the boiler can lower the air pollution remarkably. The ash, sulfur as well as nitrogen web content in the natural gas is low. The smoke of gas has little SOx, which a fulfill stated standard. But the NOx exhaust is still a problem. Looked into located the NOx exhaust of natural gas central heating boiler is 125mg/m3, as well as 25% of them is greater than 150mg/m3.
Final thought.
According to the analysis above, the sort of biomass fuel has great influence on the contaminant emission. Wood pellets has much less SO2 discharge than straw pellets. The biomass central heating boiler with film-type dirt collection agency has much better ash eliminating result than bag-type dust collection agency.
The NOx discharge is beyond standard in biomass central heating boilers without sulfur or nitrate eliminating gadget, whatever timber pellets or straw pellets. As a result, it is suggest to outfit efficient dirt collector, and also sulfur and also nitrate eliminating tool.
Natural gas has advantages in cutting smoke and also SO2 exhaust. Yet with the boosting discharge requirement, more gas boilers will take on low-nitrogen combustion technology and also nitrate eliminating device.
The particular advantages of natural gas and biomass fuel.
The price of biomass central heating boiler is more than natural gas. Their operating cost is similar considering the increase of gas price. Besides, the gas boiler is simpler to manage, and also it doesn't take much floor space or gas storage room.
The cost of natural gas is under government control, so it will not vary sharply. The gas supply can be guaranteed when the gas central heating boiler remains in usage. Biomass pellets supply is limited by seasons. The cost and supply is unstable, which normally occupies huge stockroom space.
In terms of environmental protection, biomass boilers need to be geared up with dust collection agency, sulfur and nitrate eliminating device to guarantee the smoke, SO2 as well as NOx discharge fulfill the standard. But gas central heating boilers doesn't require dust collection agency or desulfurizer, yet it need to embrace low-nitrogen combustion technology or nitrate eliminating device to reduce the NOx exhaust. Besides, the gas central heating boiler does not need dirt cleaning process.
On the other side, biomass fuel is renewable. It is solar energy transferred in plants by photosynthesis. As stats reveal, the biomass energy created by photosynthesis is 173 billion load, but only 3% of them are utilized. Besides, biomass energy is carbon neutral, which means the carbon dioxide intake in its growth equates to the emission in biomass fuel burning.
Fluidized-bed combustion is a technology based on gas-solid fluidized state. It has excellent adaptability to biomass fuels, the contaminant gas exhaust is low. By includingfish pellet millto the fluidized bed, it can get rid of the sulfur directly, and decrease the SO2 material in the smoke greatly.
Nowadays, the fluidized bed can be made use of for the combustion of various sort of fuels, ideal for the co-firing of biomass and coals. The kind of fuels and their percentage is adjustable, so you can choose them according the price to decrease your cost.
The high cost of natural gas is a problem. And also the cost difference between summer as well as winter is buckling down. Biomass is an excellent alternative to traditional gas. To satisfy the environmental requirement and also accomplish higher cost-effective benefits, it is necessary to improve the application innovation of biomass gas, as well as enhance the percentage of biomass in power mix.
