Notes

Why is biomass a better alternative to natural gas
Why is biomass a much better choice to natural gas?
Competition between biomass gas and also gas
Recently, the application of biomass gas is increasing. In lots of areas, there occur competitions between biomass gas as well as natural gas. In this passage, I will certainly take boiler burning as an example, and compare the tools expense, operation price as well as atmosphere effect of biomass central heating boiler as well as gas boiler.

This blog contrasts the financial and ecological effect of biomass fuel and also gas. The equipment expense of biomass boiler is higher than that of natural gas central heating boiler. Taking into consideration the high cost of natural gas, the yearly operating cost (consisting of the expense of gas, electrical energy, labors and also maintenance) of natural gas is more than biomass boiler.

When utilizing biomass gas, it requires to be geared up with dirt collection agency, sulfur and also nitrate eliminating device to make certain the contaminant exhaust fulfill the standard. When it comes to gas boiler, it takes on low-nitrogen combustion technology or denitrification tool to guarantee the NOx emission satisfy the criterion.

Evaluation of biomass power
Biomass power is solar energy transferred in biomass materials in the form of chemical power. It originates from the photosynthesis of eco-friendly plants. It has the type of strong, fluid and also gas. Biomass energy is referred to as a renewable energy.

According to the various resources, the biomass gas can be categorized into 6 kinds: plant straw, forestry waste, pet dung, aquatic plants, energy plants, life garbage.

Biomass energy has the adhering to advantages
Low cost, wide circulation, large volume, renewability, storable, easy to use.

Biomass power likewise has some disadvantages:
Low power thickness, not suitable for long-distance transportation. To make certain the biomass gas supply, it requires large area for storage space, which brings monitoring trouble.
Plant straw has broad distribution, but it is affected by regions, periods, weather conditions and also various other variables. The supply is not steady. Besides, the calorific value varies a whole lot. Some are not suitable for central heating boilers.
Different type of biomass fuels have various combustion effects, which may trigger slagging and leaves excessive ash. The alkaline content in the ash will certainly prevent the continuous job of biomass central heating boiler as well as create corrosion.
Biomass fuels are simple to obtain damp. The moisture material have fantastic result on the combustion temperature level. Over-high moisture material will make the biomass fuel unable to burn.

Economical effect
Tools cost
Take a 4t/h steam boiler as an example. The data processor of a DZL horizontal biomass boiler costs around ￥ 180,000, the cost of supporting machinery and also installment is around ￥ 65,000, so the complete equipment expense is ￥ 245,000.

A WNS series natural gas central heating boiler costs around ￥ 150,000, the cost of complementary machinery and setup is ￥ 55,000, so the overall equipment price is ￥ 205,000. Consequently, the tools cost of biomass boiler is more than that of gas central heating boiler


biomass gas boilernatural gas central heating boiler.
Annual operating expense
We still take a 4t/h steam central heating boiler for instance, and also contrast the annual procedure cost of biomass fuels and gas central heating boilers. The operation price of a central heating boiler includes gas expense, electrical energy intake, labor price and also maintenance expense

Yearly fuel expense.
For example:

The warm effectiveness of a biomass central heating 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 wood pellet per hour.
The boiler runs for 10 hrs everyday.
The yearly running time is 300days.
By estimation, the yearly fuel cost is ￥ 2,688,800.

Annual electrical cost.
For instance:.
The total power of a force and cause draft fun is 29.5 kw.
The total 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 electrical energy cost is ￥ 1.0/ kwh,.
The day-to-day running time is 10 hours.
The annual operating days are 300 days.
After that the electric charge for a year is ￥ 118,500.

Annual labor price.
For example:.
The work has 2 shifts a day.
Each shifts require 2 individual. A fire fighter and also a water driver.
The wage is ￥ 3000 each.
The labor cost is 144,000 annually.

Yearly upkeep price.
Biomass central heating boiler typically has several auxiliary machinery. Their failing price is higher than gas central heating boiler. The annual upkeep price is in percentage to the tools cost. If the maintenance price is 2.5% of the devices price, after that it is ￥ 6100 annually.

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

Natural gas boiler.
Annual gas price.
For instance.
The warm performance of biomass central heating boiler is 90%.
The calorific worth of natural gas is 35.58 MJ/kg.
The cost of natural gas is ￥ 3.1/ m3.
A gas central heating boiler can eat 315m3 gas every hr.
A gas boiler runs 10 hours day-to-day, 300 days every year.
By estimation, the yearly fuel price is ￥ 2,929,500.

Yearly electrical cost.
The power of the burner is 7.5 kw.
The power of water pump and other power usage devices is 7kw.
So the total electrical power of the biomass central heating boiler is 14.5 kw.
The electricity price is ￥ 1.0/ kwh.
The functioning time is 10 hrs every day, 300 days each year.
So the yearly electrical energy expense is ￥ 43500.

Annual labor expense.
The work has 2 shifts a day.
As the gas boiler has higher automation, and the procedure is simple, it requires just 1 fireman.
The wage is ￥ 3000 each month, so the yearly labor price is ￥ 72000.

Yearly maintenance expense.
The maintenance work of a gas central heating boiler is not much, the price is low.
Intend the upkeep price is 1% of the devices expense, after that it is ￥ 2100 yearly.
By calculation, the annual running expense of a biomass central heating boiler is ￥ 3,047,100.

Final thought.
In terms of the devices expense, biomass central heating boiler is more than gas boiler. In terms of the yearly running price, as gas boiler has higher automation level, needs less power intake tool, as well as less maintenance, the electrical fee, labor expense and maintenance expense is lower than that of biomass central heating boiler. However thinking about the high cost of gas, the total operation price of gas central heating boiler is higher than that of biomass central heating boiler.

Environmental result.
Biomass gas.
Researchers measured 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 as well as nitrate getting rid of tool. However the initial one is furnished with a bag-type dirt collection agency, and also the 2nd one is geared up with a film-type dust collection agency.

The boiler geared up with film-type dirt enthusiast can decrease the ash discharge effectively. In regards to SO2 emission, the wood pellets can satisfy the stipulated requirement also without sulfur getting rid of device. As for NOx discharge, the timber pellets can fulfill the requirement in central heating boilers furnished with film-type dust collection agency.

Gas.
Natural gas is an excellent quality as well as tidy gas fuel. The fostering of natural gas in the central heating boiler can lower the air contamination extremely. The ash, sulfur and nitrogen web content in the gas is low. The smoke of gas has little SOx, which a meet specified standard. However the NOx emission is still a trouble. Looked into located the NOx emission of gas central heating boiler is 125mg/m3, as well as 25% of them is more than 150mg/m3.

Verdict.
According to the analysis over, the sort of biomass gas has excellent influence on the contaminant exhaust. krone straw pellet machine has much less SO2 discharge than straw pellets. The biomass central heating boiler with film-type dirt collector has much better ash getting rid of impact than bag-type dust enthusiast.

The NOx discharge is past requirement in biomass boilers without sulfur or nitrate eliminating tool, whatever wood pellets or straw pellets. For that reason, it is suggest to furnish effective dirt collector, and also sulfur and nitrate getting rid of tool.

Gas has advantages in reducing smoke and also SO2 exhaust. Yet with the increasing exhaust requirement, more gas central heating boilers will certainly take on low-nitrogen combustion innovation and also nitrate eliminating tool.

The particular benefits of gas as well as biomass fuel.
The price of biomass central heating boiler is greater than gas. Their operating expense is comparable considering the increase of natural gas rate. Besides, the gas central heating boiler is less complicated to manage, as well as it does not take much flooring space or fuel storage room.

The price of gas is under government control, so it will not change dramatically. The gas supply can be assured when the gas central heating boiler remains in use. Biomass pellets supply is limited by periods. The price and also supply is unsteady, which typically occupies large warehouse area.

In terms of environmental protection, biomass boilers have to be furnished with dirt enthusiast, sulfur and also nitrate eliminating tool to ensure the smoke, SO2 and NOx discharge meet the criterion. Yet gas central heating boilers does not need dirt collector or desulfurizer, but it require to take on low-nitrogen combustion technology or nitrate getting rid of gadget to cut the NOx discharge. Besides, the gas central heating boiler does not require dust cleansing procedure.

On the other side, biomass fuel is renewable. It is solar power deposited in plants by photosynthesis. As data reveal, the biomass power created by photosynthesis is 173 billion heap, however only 3% of them are used. Besides, biomass power is carbon neutral, which means the carbon dioxide intake in its development amounts to the discharge in biomass fuel burning.

Fluidized-bed combustion is a technology based on gas-solid fluidized state. It has excellent versatility to biomass fuels, the toxin gas emission is low. By including desulfurizer to the fluidized bed, it can eliminate the sulfur directly, and minimize the SO2 material in the smoke sharply.

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

The high rate of gas is a trouble. As well as the cost variation between summer and winter months is buckling down. biomass pellet plant is a superb replacement for traditional fuels. To satisfy the ecological demand and accomplish higher cost-effective benefits, 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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