Waste incineration power generation is an important new energy industry related to people's livelihood.China has basically clarified the development direction of industrialization and marketization of waste treatment from the perspective of industrial policy.Since 2016, the state has formulated a series of policies and measures to promote the sustainable and healthy development of waste incineration power generation. The National Energy Administration, the former ministry of environmental protection, and the ministry of housing and urban construction have also issued relevant documents to support the development of waste incineration power generation industry.
However, as a pre-work of garbage incineration power generation, the methods related to garbage classification and recycling have not been clarified and implemented, and there are not enough constraints and incentive mechanisms to make garbage classification universal, which cannot create good conditions for harmless garbage treatment and garbage incineration power generation.At the same time, the corresponding design, manufacturing specifications, standard boxes of various investment, tax, subsidies and other policies still need to be further improved, especially the garbage treatment subsidies policy, in the vicious competition appeared unstable phenomenon.It is the key to formulate corresponding preferential policies for waste incineration power generation in developed countries. Without preferential policies and various subsidies, it is difficult for waste incineration power generation to be industrialized.Therefore, the relevant laws and policies of waste incineration power generation industry and related policies, norms and economic policies are to be improved.
Pressure conversion
1 bar is 10^5 Pa.
1 dyn/cm2 =0.1 Pa
Torr =133.322 Pa
1 mmHg (mmHg) =133.322 Pa
1 mm water column (mmH2O) =9.80665 Pa
Engineering atmospheric pressure =98.0665 kPa
KPa =0.145 psi =0.0102 kg force/square centimeter (KGF /c㎡) =0.0098 atmospheric pressure (ATM)
1 psi =6.895 kPa =0.0703 kPa =0.0689 bar =0.068 atmosphere
1 physical atmospheric pressure (ATM) =101.325 kPa =14.696 psi =1.0333 bar 1m³(gaseous) liquefied gas =2.3kg (liquid) liquefied gas
The proportion of common
0.81 kg/m&sup 3 gas;2.08 kg/m&sup 3 liquefied petroleum gas;City gas 0.58kg/m³Air is 1.24 kg/m&sup 3;
Common volume: 1 gallon (gal) =3.785 liters (1)
Conversion of heat transfer coefficient
Hour (kcal/ SQM. H) =1.16279 watts/SQM (w/ SQM)
1 kcal/(m.. ℃) [1 kcal/(m.h. ℃)) = 1.16279 w/(m. Kelvin) w/(m2. K)
1 British thermal unit /(ft. 2. H.℉) [Btu/(ft2.h.℉)] =5.67826 w/ (m. Kelvin) [(w/ m2.k)]
1 m2 h.℃/kcal (m2.h.℃/kcal) =0.86000 m2. Kelvin/watt (m2.k /W)
1 kcal (m.. ℃) (kcal/(m.h. ℃)) = 1.16279 W/(m. Kelvin) W/(m.K)
1 btu/(feet.. ℉) But/(ft. H. ℉) = 1.7303 W/(m. Kelvin) W/(m.K)
For large water tube boilers, mixing of FGR recirculated flue gas and fresh air is generally provided with mixing bellows.According to the different layout position is divided into pre - premix and post - premix.Pre-mixing is to arrange the mixing bellows in front of the blower, recirculating the flue gas and fresh air mixed, in the blower into the air, is sent to the burner to participate in combustion, in the mixed air into the air before the air duct set trap, exhaust condensed water, fan selection should also choose anti-corrosion fan.After premix, the mixed bellows are arranged in the blower, and the recirculated flue gas is fed into the mixed bellows through the recirculating blower, mixed with the fresh air from the blower, and sent to the burner for combustion.The commissioning condition of the blower should be good compared with the pre-premixed condition. However, a large amount of condensed water will be generated in the air duct, so the steam trap should be set at the low point of the mixing bellows and the smoke air duct.
Principle of flue gas recycling:
Some low-temperature flue gas is directly sent into the furnace, or mixed with air (primary or secondary air) into the furnace, because the flue gas absorbs heat and dilutes the oxygen concentration, so that the combustion speed and temperature in the furnace are reduced, because the thermal NOx is reduced.For gas boilers, NOx reduction is most significant.In general, thermal (t-no), rapid (p-no) and fuel (f-no) production pathways are available.The flue gas recycling system is connected with the gas burner. When the inert gas in the circulating flue gas enters the burner, on the one hand, the flame propagation speed will be reduced, and on the other hand, the temperature level in the furnace will be reduced due to the absorption of heat, so the absolute flame temperature will be lowered, which cannot reach the generation temperature. Therefore, the generation of t-no will be inhibited.Other components in circulating flue gas are N2,CO2and H2O in large quantities. As circulating flue gas is mixed in, oxygen concentration in the mixture of air and flue gas decreases, thus affecting the production amount.Mixing circulating flue gas in the air increases the content of N2in the reaction.Due to the high activation energy required for the reaction of oxygen and nitrogen atoms, a large amount of nitrogen failed to react with oxygen to form NO, and reacted with hydrocarbon components in the fuel.A large amount of N2increases the forward reaction of the above equation and generates a large amount of intermediate HCN.The oxygen atoms in the flue gas then react with these intermediate products. The total O2 reaction of HCN in the poor oxygen environment is as follows: HCN+ 5/4O2-+ 1/2N2+CO2+ 1/2H2O;According to the formula, under the condition of lean oxygen and dense combustion, HCN finally generates N2.Therefore, after adopting the flue gas recycling system, on the one hand, the intermediate product HCN increased, while on the other hand, the concentration of O2decreased compared with that before the flue gas recycling was not applicable, which promoted the complete reaction, and the amount of N2was greatly increased, thus reducing the generation of p-no.
After decades of development, EBICO is beginning to enter a critical period of second entrepreneurship.In the face of the changing market, tide business sea, only firm faith, never give up, forge ahead, constantly beyond, can stand the tide.In the future, we will continue to adhere to the safety, energy saving and environmental protection features of EBICO burner, and build EBICO into a value-added brand that leads the market, exceeds the budget and contributes to the society.
Clean energy consumption and utilization is a systematic problem involving power supply, power grid and power load.At present, the consumption of clean energy in China is mainly faced with the following difficulties: first, the reverse distribution of resources and demand. Most of the landscape resources are distributed in the "three north" region, while the water energy resources are mainly concentrated in the southwest region, while the power load is mainly concentrated in the central, eastern and southern regions.Second, the rapid development of clean energy does not match the growth rate of electricity consumption in recent years. In recent years, with the active support of national policies, the installed capacity of clean energy, especially wind power and photovoltaic power generation, has maintained a fast growth rate, far exceeding the growth rate of electricity consumption of the whole society.Third, the processing of wind power and photovoltaic power generation is affected by natural conditions, and there are relatively large fluctuations. After large-scale grid connection, it brings great challenges to power system dispatching and operation.At present, China's power system is not fully adapted to such a large scale of volatile new energy access.
——Author：ebico