water oil boilers foreign
It is reported that Jinjiang City of Fujian Province will be fully started tackling air pollution prevention and control work, Market Authority as a proactive, Take Measures to promote coal-fired boiler renovation work.
Market Authority through three initiatives to further improve the environmental air treatment Jinjiang City, Jinjiang create "blue sky": strict criteria, the better the mark.
Actively cooperate with environmental protection, by letter and other relevant departments, coal-fired boilers do not meet environmental policy, shall not start to inform, Supervision, Inspection and registration certificate for the use of strict coal-fired boilers access gateway, departmental interaction, ensure its effectiveness.
Strengthen communication and coordination with environmental protection, by letter and other related departments and Towns, a solid job of remediation coal-fired boilers, out of work.
Combined area of gas supply, heating pipe network coverage, and vigorously promote the use of natural gas, electricity and other clean energy, and take the way government subsidies, coal-fired boiler to remove their push to ensure the prevention and control of atmospheric achieve results.
Step up publicity services in place. Organization of the market supervision area of propaganda out of coal-fired boilers policy of the increase, according to the sense of service, "a visit to promote a" do a good job guidance subsidies, removal and cancellation of work, and guide to remove their coal-fired boilers, and required to apply for removal of cancellation.
Application of heating Boiler Control systemThe heating boiler is equipped with a special microcomputer controller for hot water boilers foreign, large screen full Chinese liquid crystal screen, with super bright backlight, no matter day or night, the operation status of the boiler is clearly visible. Complete display: circulating pump working condition, burner working condition, furnace water temperature, water level, current time, alarm record, etc., boiler operation condition is all available; Easy to set: after the boiler starts, the operator can enter the standby state (setting), enter the running state (start), exit the running state (stop), and set the running parameters at will when the boiler is on standby. Full-featured: you can set the current time at any time , alarm temperature, water temperature upper limit temperature, water temperature lower limit temperature, circulating pump opening temperature, circulating pump closing temperature, boiler switching time (can be divided into 4 time periods) and other operating parameters. Usually the operator just press; start the start key, press; Stop the key stop can, very simple use of the original imported burner, fully automatic programmed control, fan automatic blowing, electronic automatic ignition, automatic combustion of oil and gas, air and oil (gas) automatic proportional adjustment, atomization effect is good, combustion is full, Energy-saving and environmental protection, with extinguishing protection device to ensure the safety of combustion. Under normal conditions, the burner output automatically adjusts the length of the combustion flame with the boiler temperature When the outlet temperature of the boiler reaches the set value, the burner automatically stops burning, and when the temperature is below the set value, the burner starts to work automatically. When the fuel and intake air are abnormal, the fault light is on, the program control device will stop outputting the fuel immediately, and the burner will stop automatically.
4tph WNS gas-fired firetube boiler project for food industryBoilers are mainly used to provide steam for drying, refining, destaining and other processes in the productive progress of edible oil. As a children company of AnHui COFCO Biochemical, AnHui COFCO Edible Oil Co.,Ltd. is founded on 2000, producing premium quality edible oil from corn germ, rapeseed, peanut, soy bean etc.. In order to develop the circular economy, COFCO has taken an active part in energy saving and emission reduction these years. The company adopts reliable and advanced waste water treatment system, meanwhile, the environment protection facilities also produces ammonia sulfate, feed and methane as by products. Therefore, they’d like to use desulfuration methane as the fuel for boiler to improve economic returns. They have planned to order one set of methane-fired boiler. ZOZEN’s WNS series firetube boilers have drew their attention by remarkable performance. This kind of firetube boilers is adaptable for various fuels, including natural gas, methane and coke oven gas. Large corrugated furnace is adopted for complete combustion. Meanwhile, engineers of ZOZEN also add the condenser, economizer and other energy-saving equipment at the end of flue gas duct in accordance with actual demand of the company, which makes the thermal efficiency reach above 98%. Furthermore, it equips with advanced combustion apparatus for lower NOx emission.
The heat loss of exhaust smoke is the largest of all kinds of heat loss in boiler. Generally, the heat loss of exhaust smoke is 6% of the heat fed into the furnace, and the heat loss of exhaust gas increases 0.5% when the temperature of exhaust gas increases by 12 ℃ and 15 ℃. So the exhaust temperature is one of the most important indicators of boiler operation. The following are several possible causes of increased flue gas temperature in the furnace: (1) slagging and ash accumulation on the heated surface. No matter it is the slag accumulation in the water-cooled wall of the furnace, or the ash deposition in the superheater, convection tube bundle, economizer and preheater, the thermal resistance of the flue gas measurement will increase, the cooling effect of the flue gas will become worse due to the deterioration of the heat transfer, and the exhaust temperature will rise. (2) excess air coefficient Big. Under normal conditions, the exhaust temperature increases with the increase of excess air coefficient at furnace outlet. After the increase of excess air coefficient, although the amount of smoke increased, the rate of smoke increased, and the convection heat increased, the increase of heat transfer was not as much as that of the increase of flue gas. It can be understood that after the increase of smoke speed, the flue gas leaves the heating surface without time to transfer heat to the working fluid. (3) the air leakage coefficient is too large. The flue gas leakage in the furnace and rear shaft of a negative pressure boiler is inevitable and the leakage coefficient allowed by a certain heating surface is specified. When the air leakage coefficient increases, the effect on the exhaust temperature is similar to that of the superheated air coefficient. And the air leaks away. The closer the furnace is, the greater the influence on the rise in exhaust temperature. (4) Water supply temperature. When the steam turbine load is too low or the high pressure heater is out of line, the feed water temperature of the boiler will be lowered. Generally speaking, if the fuel quantity is kept constant, the heat transfer temperature difference of the economizer decreases and the heat absorption of the economizer decreases when the feed water temperature is increased, which makes the exhaust temperature increase. (5) moisture in the fuel. The increase of moisture in the fuel increases the amount of smoke, thus increasing the exhaust temperature. (6) Boiler load. Although the boiler load increases proportionally, the amount of smoke, the amount of steam, the amount of water supplied, and the volume of air increase proportionally, however, the flue gas temperature at the furnace outlet increases proportionally. Increase, so that the exhaust temperature increased. After increasing the load, the outlet temperature of the furnace increases, the heat transfer temperature difference of the convection heating surface increases and the heat absorption increases. Therefore, the more the convection heating surface is, the less the influence of the boiler load on the exhaust gas temperature is. (7) fuel varieties. When the low calorific value gas is fired, the radiative heat transfer in the furnace decreases due to the decrease of furnace temperature, and the non-combustible components in low calorific value gas, mainly N _ 2, CO _ 2 and H _ 2O, increase the amount of flue gas, so the exhaust temperature increases. Although the excess air coefficient of furnace outlet is lower than that of coal burning, the ash content in the fuel oil is very low after the pulverized coal furnace is changed to burn oil, although the excess air coefficient at the furnace outlet is lower when burning oil. There is no larger ash particle in flue gas, and there is no cleaning effect of larger ash particle on the heating surface, and the convection heating surface is polluted more seriously. Therefore, combustion is not good, often smoke-emitting boiler smoke temperature rise. When there is a steel ball dust removal device at the tail, the exhaust temperature is slightly lower than that of burning coal because the tail is cleaner. (8) the operation mode of pulverizing system. For a closed pulverizing system with a silo, when the pulverizing system is in operation, as a part of the water in the fuel enters the furnace, the furnace temperature decreases and the flue gas increases, and the cold air leaking into the pulverizing system enters the furnace as a primary air during the operation of the pulverizing system. Reduction of air flow through air preheater To raise the exhaust temperature. On the contrary, when the pulverizing system is shut down, the exhaust temperature decreases.