By Jackie 2019-12-12 10:46:15
A burner is a device for ejecting a mixture of fuel and air in a certain way.Burners are classified into industrial burners, burners, civil burners and special burners according to their types and application fields.Multi-purpose stainless steel or titanium metal corrosion resistant, high temperature resistant materials made.The role of the burner is to atomize the sample through flame combustion.The atomized test solution enters the burner and, under the action of flame temperature and atmosphere, goes through drying, melting, evaporation, dissociation and other processes to produce a large number of ground state atoms and some excited state atoms, ions and molecules.A well-designed burner should have the characteristics of high atomization efficiency, low noise and stable flame, so as to ensure high absorption sensitivity and precision of measurement.Gap burners are commonly used in atomic absorption spectrometry to generate atomic vapor.According to the different types of gas and auxiliary gas, the length and width of the gap of the burner are different. Generally, applicable gas and auxiliary gas are marked on the burner.
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.
Integrated control system is that we proposed earlier today's more advanced control mode, is widely used in Europe and the us some dimensions industry in our country and demanding enterprises choose this control concept, its core idea is to put the boiler and burner control together unified programming, making accurate digital control, this control model to avoid the original control of shortcomings, such as: scattered, incompatible, multipoint multiple handling, economic problems.
Its advantages are obvious:
Software compatibility optimization, electronic control uniformity, greatly improve the control accuracy, energy saving
Design and manufacture consistency, safety and reliability and production cost savings
Single human-computer interface dialogue
Operating system intuition
Improve maneuverability and safety
Single professional debugging, to ensure safety and efficiency
Continuity of one-stop after-sales service, greatly improve the work efficiency, reduce the service cost for users
One-click accessories, software and supply upgrades are guaranteed
Enough about how to solve the trouble of burner
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.