Notes

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

Recently, the application of biomass gas is boosting. In several areas, there arise competitors between biomass gas and natural gas. In this flow, I will take central heating boiler burning as an example, as well as contrast the devices expense, operation cost and also setting effect of biomass boiler as well as natural gas central heating boiler.



This blog site compares the financial as well as ecological result of biomass gas and also natural gas. fuel pellet mill of biomass boiler is greater than that of gas central heating boiler. Taking into consideration the high cost of natural gas, the annual operating cost (consisting of the price of fuel, electrical power, labors and also maintenance) of gas is greater than biomass central heating boiler.



When using biomass fuels, it calls for to be geared up with dirt enthusiast, sulfur and nitrate removing tool to guarantee the contaminant discharge fulfill the standard. As for gas boiler, it embraces low-nitrogen combustion technology or denitrification tool to guarantee the NOx discharge satisfy the standard.



Evaluation of biomass energy

Biomass energy is solar energy transferred in biomass materials in the form of chemical energy. It originates from the photosynthesis of environment-friendly plants. It has the kind of solid, liquid and also gas. Biomass energy is referred to as a renewable resource.



According to the different sources, the biomass gas can be identified into 6 kinds: plant straw, forestry waste, pet dung, water plants, energy plants, life rubbish.



Biomass power has the complying with benefits

Low cost, large distribution, large quantity, renewability, storable, easy to use.



Biomass energy likewise has some drawbacks:

Reduced energy density, not ideal for long-distance transport. To make certain the biomass fuel supply, it calls for huge space for storage, which brings administration issue.


Crop straw has large distribution, but it is influenced by regions, periods, weathers and also various other aspects. The supply is not secure. Besides, the calorific value differs a whole lot. Some are not ideal for boilers.

Different sort of biomass fuels have various burning results, which might trigger slagging and leaves excessive ash. The alkaline material in the ash will certainly hinder the continual work of biomass central heating boiler and also trigger rust.

Biomass fuels are simple to get damp. The moisture web content have wonderful impact on the combustion temperature. Over-high wetness material will make the biomass gas not able to shed.



Economical effect

Tools price

Take a 4t/h steam central heating boiler for instance. The mainframe of a DZL straight biomass central heating boiler expenses around ￥ 180,000, the expense of supporting machinery and also installment is around ￥ 65,000, so the overall devices price is ￥ 245,000.



A WNS collection natural gas central heating boiler costs around ￥ 150,000, the expense of auxiliary machinery and installment is ￥ 55,000, so the overall devices cost is ￥ 205,000. As a result, the equipment cost of biomass central heating boiler is greater than that of gas boiler



biomass fuel boilernatural gas central heating boiler.

Annual operating expense

We still take a 4t/h steam boiler as an example, and contrast the annual procedure expense of biomass fuels and also gas boilers. The procedure expense of a boiler consists of fuels price, electrical energy intake, labor cost and maintenance expense



Yearly gas cost.

As an example:

The warm performance of a biomass boiler is 80%.

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

The expense of wood pellets is ￥ 1250/t.

A biomass central heating boiler eat 717kg wood pellet per hr.

The boiler runs for 10 hrs day-to-day.

The yearly running time is 300days.

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



Annual electrical cost.

As an example:.

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

The total power of the reduction box, feeder, water pump and conveyor is 10kw.

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

The electrical power cost is ￥ 1.0/ kwh,.

The everyday running time is 10 hours.

The annual operating days are 300 days.

Then the electric charge for a year is ￥ 118,500.



Annual labor price.

As an example:.

The work has 2 changes a day.

Each shifts require 2 person. A fireman as well as a water driver.

The income is ￥ 3000 each.

The labor price is 144,000 each year.



Annual maintenance cost.

Biomass central heating boiler normally has numerous complementary machinery. Their failing price is greater than gas central heating boiler. The annual upkeep expense is in proportion to the tools expense. If the maintenance expense is 2.5% of the equipment cost, then it is ￥ 6100 each year.



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



Natural gas boiler.

Yearly gas expense.

For instance.

The heat effectiveness of biomass 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 boiler can consume 315m3 gas every hr.

A gas central heating boiler operates 10 hours everyday, 300 days each year.

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



Yearly electrical cost.

The power of the heater is 7.5 kw.

The power of water pump and also other power use equipment is 7kw.

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

The power cost is ￥ 1.0/ kwh.

The functioning time is 10 hrs every day, 300 days annually.

So the yearly power expense is ￥ 43500.



Annual labor expense.

The job has 2 changes a day.

As the gas central heating boiler has higher automation, and the procedure is basic, it calls for only 1 fire fighter.

The wage is ￥ 3000 monthly, so the yearly labor cost is ￥ 72000.



Yearly upkeep cost.

The upkeep work of a gas boiler is not much, the price is reduced.

Suppose the upkeep cost is 1% of the devices expense, then it is ￥ 2100 annually.

By calculation, the yearly running expense of a biomass boiler is ￥ 3,047,100.



Verdict.

In terms of the equipment expense, biomass central heating boiler is higher than gas boiler. In small floating fish feed machine of the yearly running cost, as natural gas boiler has higher automation level, needs less power usage gadget, as well as much less maintenance, the electric fee, labor expense as well as upkeep expense is lower than that of biomass boiler. But taking into consideration the high price of natural gas, the total operation cost of gas boiler is more than that of biomass boiler.



Ecological impact.

Biomass fuel.

Scientist measured the exhaust of smoke, SO2 as well as NOx in 2 biomass boiler.



These 2 boilers has similar evaporation capacity. Both of them are not outfitted with sulfur as well as nitrate getting rid of tool. Yet the initial one is equipped with a bag-type dust collector, as well as the second one is equipped with a film-type dirt enthusiast.



The boiler geared up with film-type dirt enthusiast can lower the ash emission efficiently. In terms of SO2 exhaust, the wood pellets can meet the stipulated requirement also without sulfur eliminating device. When it comes to NOx emission, the wood pellets can fulfill the criterion in central heating boilers outfitted 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 reduce the air pollution incredibly. The ash, sulfur and also nitrogen material in the natural gas is low. The smoke of natural gas has little SOx, which a satisfy stated standard. Yet the NOx discharge is still a problem. Researched found the NOx exhaust of gas boiler is 125mg/m3, as well as 25% of them is greater than 150mg/m3.



Verdict.

According to the evaluation over, the type of biomass fuel has fantastic impact on the pollutant discharge. https://carmenrichi.publog.jp/ has less SO2 discharge than straw pellets. The biomass central heating boiler with film-type dust enthusiast has far better ash getting rid of effect than bag-type dirt enthusiast.



The NOx emission is past criterion in biomass boilers without sulfur or nitrate removing tool, whatever wood pellets or straw pellets. Therefore, it is recommend to furnish efficient dirt collector, as well as sulfur and nitrate getting rid of gadget.



Natural gas has advantages in cutting smoke and also SO2 emission. However with the increasing exhaust requirement, even more gas central heating boilers will certainly adopt low-nitrogen combustion technology and nitrate removing gadget.



The particular benefits of natural gas and biomass gas.

The price of biomass boiler is greater than gas. Their operating expense is comparable thinking about the surge of natural gas rate. Besides, the natural gas boiler is simpler to control, and also it doesn't take much flooring area or fuel storeroom.



The cost of natural gas is under government control, so it will not change dramatically. The natural gas supply can be assured when the gas central heating boiler is in usage. Biomass pellets supply is limited by periods. The cost and supply is unpredictable, which usually uses up huge warehouse area.



In terms of environmental management, biomass boilers need to be equipped with dust collector, sulfur and also nitrate getting rid of gadget to guarantee the smoke, SO2 as well as NOx exhaust fulfill the requirement. Yet gas boilers doesn't need dust collector or desulfurizer, yet it require to adopt low-nitrogen combustion modern technology or nitrate eliminating gadget to reduce the NOx exhaust. Besides, the natural gas boiler doesn't require dust cleansing process.



On the other side, biomass gas is renewable. It is solar power deposited in plants by photosynthesis. As stats show, the biomass energy produced by photosynthesis is 173 billion lot, however just 3% of them are made use of. Besides, biomass energy is carbon neutral, which means the CO2 intake in its development amounts to the emission in biomass gas burning.



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



Nowadays, the fluidized bed can be used for the combustion of various sort of fuels, suitable for the co-firing of biomass as well as coals. The kind of fuels and also their percentage is adjustable, so you can choose them according the price to reduce your expense.



The high cost of gas is a trouble. As well as the cost disparity between summertime and also winter is getting serious. Biomass is an excellent replacement for traditional fuels. To meet the ecological need as well as accomplish greater cost-effective advantages, it is essential to enhance the application technology of biomass fuel, and increase the percentage of biomass in energy mix.

Homepage: https://carmenrichi.publog.jp/