In the national standard of water quality standard, the water quality index of hot water boiler stipulates that the total hardness of water supply for chemical treatment outside furnace is less than 0.6 mmol / L. In recent years, in order to reduce the operating cost of heating units, some hot water gas-fired fired steam boiler 15 psis have been overloaded due to the use of class Ⅲ bituminous coal as fuel instead of class Ⅱ bituminous coal designed to replace the designed type Ⅱ bituminous coal. During the maintenance in summer, it is found that the overloading boiler water wall tube fouling problem is more prominent, some boilers even occur tube burst accident. Why is heating hot water boiler overloaded, scale and even burst tube? Because the calorific value of class Ⅲ bituminous coal is higher, the type Ⅲ bituminous coal of the same weight is burned instead of the designed class Ⅱ bituminous coal. Bituminous coal increases the circulation of boiler riser is not absolute equilibrium, the geometric difference of riser and the heat load are different, so there is inevitably the deviation of flow rate between the risers. Due to the overloading operation of the boiler, some riser tubes are easy to overheat boiling because the flow rate is small, and the wall temperature is higher than the designed wall temperature, so that the scale and even the tube burst are easy to occur. How to prevent the boiler from scaling when overloaded? The heating hot water boiler operates under overload because of the scaling after the superheated boiling. Steam is produced in the process of superheated boiling. The water quality requirement of gas steam boiler is less than 0.03 mmol / L, which is much lower than that of hot water boiler. Water quality requirements. Based on the above reasons, the feed water hardness of heating hot water boiler is reduced, and the scaling phenomenon is eliminated by reducing 0.6mmol/L to 0.03mmol/L.
Boiler steam temperature affect the safety and economy temperatures above will be lower than the rated temperature of the device, it will have a bad effect. If the temperature exceeds its rated value, the boiler will cause overheating of the relevant metal material, material creep acceleration, will shorten the life of the boiler. If the temperature is too high, but some of the key components of the boiler would cause damage, can also cause serious and even superheater tube rupture. If the temperature is lower than the rated temperature, vapor enthalpy is reduced, increased air consumption, decreased economy. This will reduce the thermodynamic cycle efficiency of the plant, the steam humidity at the last stage blades of the gas turbine increases, causing erosion and damage to water droplets gas turbine blades, affect the safe operation of the gas turbine. Ruoyin with water vapor causes a decrease in temperature, the moisture in the salt impurities formed in the superheater scale, pipe valves, gas turbine blade, because the superheater lead to reduced heat transfer, the temperature decreased, damage increased wall temperature; and cause the valve plug, the operation failure; and a gas turbine blade erosion, loss of balance and vibration occurs. Temperature fluctuations reason superheater actual heat transfer the vapor does not reach the required amount of heat absorbed corresponding balancing. When the heat absorbed is greater than the heat transfer, the temperature rise; conversely decreased. Many factors affect the temperature change, including both gas side and the vapor side. Such as boiler load increased, but also to ensure the boiler load unchanged or decreased in order to prevent pressure shall increase the amount of fuel and air supply, strengthen the burning, causing the furnace exit flue gas temperature of the flue gas volume increases and lower water temperature , temperature increase; If the oil and gas fuel is combusted in the furnace carbon black is not fully formed, into the superheater flue causing secondary combustion, but also greatly increase the superheat temperature. Reducing the temperature of the main reasons: improper adjustment of combustion, low flame center furnace; superheater area is small, or too much leakage at the furnace wall; Save water flow rising or temperature reduction; drum water level or high gas-water separator separating efficiency is lowered, the humidity of the vapor is increased; superheater tube fouling, reduced heat absorption and the like.
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Gas-fired fired steam boiler 15 psi steam boiler and gas accounted for half of the market at any time, more and more national attention to environmental protection, gas steam boiler has been hit hard. In contrast, gas steam boiler by many users of all ages. In recent years, also vigorously promote the use of gas-fired boiler. Gas-fired steam boilers What are the benefits? Let us discuss with you today. Gas-fired steam boiler steam boiler and gas market accounted for half of the market, showing a trend of resistance of court, but in the long run, gas steam boiler will obviously be the only dominant market. Do not believe, look! 1. Purchase costs: Obviously, in terms of technical gas boiler and auxiliary aids far ahead of the gas boiler, and is equipped with a special gas burner. 1 ton steam boiler, for example, gas boiler about 30% higher than the gas boiler. 2. Construction cost: This cost mainly from the boiler room. As more gas steam boiler auxiliary equipment, boiler house construction should invest more money. Less gas boiler auxiliary equipment, automatic control operation, with automatic alarm and automatic protection, saving the cost of housing, safe and reliable. After natural gas pipeline, the burner will automatically supply, cost-effective employee. Gas boilers also need to pay some wages, because they need to participate in coal plan. 3. fuel costs: You can clearly see this by looking at the actual specific fuel prices at each location. The fact is that the amount of coal burned per hour is much higher than the amount of gas. 4. environmental costs: In the need to protect the environment, the review of the gas boiler are becoming increasingly stringent. Because of the economy, environmental protection and energy as well as government policies, gas steam boilers more and more widely used.
15 PSI Low Pressure Steam Boilers Models & Ratings / Power Burner Fired Rev. 12/2013 STACK / DRAFT REQUIREMENTS UL listed for use with Type B Vent when power burner is for natural or L.P. gas fired only. Type 304 stainless steel lined stack is required when equipped with #2 oil or combination gas & #2 oil burner.Online chat
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Details about Cleaver Brooks Steam boiler 15 PSI Gas Fired / Loaded on your truck. Cleaver Brooks Steam boiler 15 PSI Gas Fired / Loaded on your truck.Online chat
Gas-Fired Hot Water Induced Draft Boilers INSTALLATION, OPERATION & MAINTENANCE MANUAL Manufactured by: ECR International, Inc. 2201 Dwyer Avenue, Utica NY 13501 web site: Models SVB-2 SVB-3 SVB-4 SVB-5 SVB-6 SVB-7 C.S.A. Certified For Natural Gas Or Propane Tested For 50 psi. ASME Working PressureOnline chat
The Slant/Fin VSL-160 Condensing Gas boiler stands at The Slant/Fin VSL-160 Condensing Gas boiler stands at the top in performance safety and environmental ratings. The boiler is equipped with a stainless steel fecralloy fiber mesh burner and is available for natural or propane gas.Online chat
Boiler, 9 HP, Peerless Boilers, 15 PSI, 323 lbs/hr steam (2) Boiler, 9 HP, Peerless Boilers, 15 PSI, 323 lbs/hr steam (2) Manufacturer: Peerless (2) Peerless Gas-Fired Boiler, boiler number 64-08-SPRK-W/s. Maximum BTU's per hour: 399,000. Gross output of 331,000 BTUs per hour water, 323,000 BTUS per hour steam. Driven by 9 HP motor. Good condition.Online chat
From single-family homes to large-scale apartment complexes, the Weil-McLain name is synonymous with warmth and comfort. Our energy-efficient, high quality gas and oil-fired boilers can be designed to fit the tightest spaces, with boiler controls and zone controllers tailored to any size residential application.Online chat
Manufacturer & distributor of boilers including electric steam boilers, gas fired & oil fired steam boilers. Features capacities ranging from 200 bhp to 300 bhp, operating pressure from 15 psig to 225 psig, blow down separator, chemical feed system, duplex water softener system, electrical controlOnline chat
commercial atmospheric gas-fired steam boiler 401 to 1950 mbh input cast iron sectional design 15 psi steam only atmospheric vent suited to low ceiling height 77% thermal efficiencyOnline chat
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T he ClearFire-V is a carbon steel, vertical, gas-fired, steam boiler designed for the requirements of the commercial market, available in eight sizes. The AluFer® tubes with fireside extended heating surface provide maximum heat transfer and eliminate laminar gas flow during minimum firing, providing optimized efficiency throughout the firingOnline chat
150 PSI Pressure oil Fired Steam Boiler. 15 psi pressure low pressure natural gas fired boiler. 75 psi to 120 psi pressure fuel oil fired boiler oil . 2019-4-1 · 75 psi to 120 psi pressure fuel oil fired boiler Rite Power Burner Fired Low Pressure Steam Boilers must be specified when: Low NOx emissions are required Minimum height for #2 oil or combination gas amp; #2 oil 75. 100. 125. 150Online chat
Weil-McLain offers a broad spectrum of high efficiency gas-fired, oil-fired and combination oil/gas boilers for commercial use. Whatever your needs --heating a restaurant, hotel, casino, or any other commercial or industrial facility--depend on Weil-McLain boilers to provide the solution that delivers cost savings, energy efficiency and system flexibility.Online chat
Hurst Boiler & Welding Company, Inc. has been manufacturing, designing, engineering and servicing gas, oil, coal, solid waste, wood, biomass and hybrid fuel-fired steam and hot water boilers since 1967, for thousands of satisfied customers.Online chat
2019-10-15·A high-pressure steam locomotive is a steam locomotive with a boiler that operates at pressures well above what would be considered normal. In the later years of steam, boiler pressures were typically 200 to 250 psi (1.38 to 1.72 MPa).Online chat