service instructions for contractors gas condensing boilers
Jingdong, typical Chinese-style self-employed business enterprise, has its Jingdong Mall, Jingdong financial, Jingdong intelligence department. May 2014 in the US Nasdaq stock exchange officially listed. 2018 "Fortune" Global 500 list of the 181. Fast service instructions for contractors condensing boilers, A-class boiler manufacturing unit, Class 1 boiler installation company, more than 20 years dedicated to the development of clean fuel energy equipment, manufacturing and sales. The introduction of low nitrogen emission boiler is the first time in a market-oriented approach using FGR technology products, as guardian of the "APEC blue" gave their part.
2, tightness test
Indoor gas boiler pipes tightness test should be consistent with the following requirements:
① low pressure gas pipe test pressure boiler for planning a pressure not less than 5kPa, under the experimental pressure regulator least 30min, and view all the joint with the blowing agent, no leakage, no pressure gauge pressure drop qualified equipment. When the experimental system stainless steel corrugated hose, plastic composite pipe, oil hose, when the plastic cover brass, IH pressure not less than the experiment, in addition to sealing the respective view point, the end surface of the cladding layer should also whether there is leakage phenomenon View.
② medium pressure gas pipelines boiler pressure test planning more pressure and not less than 0.1Mpa. Under the experimental pressure regulator less than 2h, and view all joints with a blowing agent, no leakage, no pressure drop pressure measurement device qualified.
Burner fuel gas selected selection principles which fuel gas service instructions for contractors condensing boilers burners should be based on structural features and performance requirements of the boiler body, in conjunction with user conditions, making correct comparison, several general principles according to the following options: 1) according to user selection of used fuel type, liquid fuel kerosene, diesel oil, heavy oil, residual oil and waste oil, fuel gas city gas, natural gas, liquefied petroleum gas and biogas, fuel should have the necessary analysis of data used: ① kerosene, diesel should have heat and density. ② heavy oil, residual oil and the viscosity should, heat, moisture, flash point, mechanical impurities, ash, freezing point, density and the oil temperature. ③ should calorific gas, gas pressure and density. 2) to select the type burner nozzle atomization method or the gas burner and the furnace structure according to the performance of the boiler. 3) the burner output should match the rated output of the boiler, choose a good shape of the flame, such as length and diameter so as to adapt the furnace structure. The required combustion air is supplied from the root flare fuel gas and air or oil mist uniformly mixed rapidly, to ensure complete combustion. The rated output of the boiler and boiler efficiency is determined, the fuel consumption is calculated, and then selected according to power a single burner arranged to determine the number of burners. Increase the number of burners, in favor of the atomization quality assurance wind oil mix, but too many, and not easy to operation and maintenance, will give burner arrangement difficult. 4) adjusting the burner to a large extent, be able to adapt to changes in boiler load, to ensure complete stable combustion under different conditions. 5) fuel atomization less energy consumption, adjusting the wind resistance of the device to be small. 6) Effects of noise and smoke emission must comply with environmental standards, mainly emissions S02, CO and NOx must be lower than the predetermined country, should use low NOx burners and low noise. There are integral and split two 7) a burner assembly embodiment. I.e. monolithic burner body, the burner and a combustion air blower system (including an oil pump, a solenoid valve, a servo motor or the like) into one; split i.e. burner body (comprising a combustion head, oil or gas systems), fans and combustion burner control system (including the control box, fan thermal relay, AC contactor, etc.) are each independent three-part system, according to the specific requirements of the boiler and user choice. Simple 8) should be used in construction, reliable operation, easy to adjust and control the repair, easy to implement automatic control of the combustion process in the burner. 9) to deal with the burner brand, performance, price, and service life of comprehensive comparison. 10) In addition to the burner air pressure to overcome the resistance of the boiler body considered, but also to overcome the resistance and flue gas economizer system.
Chemical plant four tons electric service instructions for contractors condensing boilers price is how much chemical plant four tons of steam electric boiler steam price is how much? Now, with the increasingly more stringent environmental requirements, many companies are using natural gas boiler, but there are places, not very rich natural gas resources, therefore, only electric heating boiler. Electric heating boiler with the most current output is steam. Recently there Chemical Consulting 4 tons electric boiler steam price is. For four tons electric steam boiler prices, the market there is still a great distinction between intervals, can differ by tens of thousands, for businesses, do not blindly choose low-priced products, this is the case, the latter is very troublesome. Electric steam boilers currently fast boiler 4 tons of around 360,000. For businesses, choose a bad boiler manufacturers, although the low cost pre. But time later use of the boiler, the cost of maintenance of the latter is very high.