condensing hot water gas boiler

Dongying City, Shandong Province in response to low-nitrogen coal-fired boilers, industrial waste heat recycling and other environmental policies, combined with local conditions, Dali urban and rural areas to promote clean heating projects, and achieved remarkable results. As of mid-October this year, Dongying City clean heating rate of more than 72%.

Recently, Dongying Municipal Urban Management Bureau to the outside world, in order to further promote the urban and rural clean heating, it has already shut down 10 coal-fired boilers environmental non-compliance of a total of 155MW.

After shutting down 10 coal-fired boilers environmental non-compliance, Dongying City high environmental standards were established in a total of four 58MW gas-fired boiler and a total of four 70MW coal-water slurry boiler through a series of energy-saving treatment, flue gas emissions much higher than the index of new environmentally friendly ultra-low emission requirements.

Meanwhile, Dongying City, the original heating effect is also unsatisfactory 4.33 million square meters of heating regions to establish a uniform heating systems, and the use of standards to ensure clean heat source; higher operating costs for the original 2.17 million square meters of heating area heat source replacement process, both to ensure good heating effect but also saves a lot of money.

According to statistics, this year the city of Dongying city plans to add a total area of ​​clean warm 8.1138 million square meters, down to the next new clean heating in rural areas 45000.

Recently, Dongying City issued a "Dongying City 2018-- 2020 coal consumption reduction alternative work" (the "Program"), after the completion of the city's 10 steam tons / hour and small coal-fired boilers zero and start steaming for 35 out of work t / h coal-fired boilers and, as of 2020, out of 35 steam tons / hour and coal-fired boilers.

Temperature protection device during the fuel steam boiler overtemperature protection to regulate temperature protection is an important part of safe operation of steam boiler fuel, especially fuel steam boiler temperature regulation and protection. Electric heating boiler and the boiler is mainly composed of electric control box and control system. Its characteristics are environmentally friendly, clean, no pollution, no noise, automatic, with limited energy and reduce prices significantly, as a new boiler electric heating boiler equipment increasingly being recognized. Electric heating the core member is electrically heated boiler, directly determines the life of the boiler, to select a non-metallic electrical heating tube (such as a ceramic heating pipe), because it is resistant to the load, a long life, and a water separation structure, the boiler Wing no leakage. Fuel gas boiler is not only fuel but also refers to the gas boiler. Previously no such dual-fuel boiler, burner because either fuel or gas, no dual fuel burners. With the rapid development of the world energy equipment, some European countries begin production and sales of fuel gas burner, dual fuel burner and boiler combination of organic birth of a new breed of boiler - fuel gas-fired boiler. Meanwhile, when the superheated steam boiler fuel, can play a role in the regulation and protection. Conventional boiler temperature protection means is a bimetallic temperature controller. Flame protection: To prevent the furnace blast, the fuel steam boiler must be equipped with flame protection device, and its function is combustion within the monitor cavity (including ignition misfire on or off in the middle of the combustion, is generally re-ignition within 5 seconds, within 1 sec. running off the oil (gas) solenoid valve, and opens the concurrent silent alarm signal, when the blower continues to operate, remove residual combustible gases in the furnace, after 20 or 30 seconds purge, and various auxiliary blowers automatically cut off power boiler stop running. flame monitor function signals displaying a flame presence or interrupt from the control device. its main use is a photomultiplier tube, photoresistors and photocells, they have an ultraviolet or infrared type photoelectric conversion element, its operating the principle of light radiation intensity is converted to the corresponding high current and low current and the output is a linear state, the induced current is sometimes weak, and thus affect the controller amplification.

How to prevent gas condensing hot water boiler explosion gas hot water boiler belongs to the category of special equipment, thermal equipment and is a frequently in high pressure high temperature state, it is inevitable some small problems that may occur during operation, this is normal; but if not in place or because of negligence, they are likely to make the boiler exploded. So, for safety equipment and personal safety, we have to understand some common sense prevention hot water boiler explosion. 1, hot water boiler furnace explosion prevention occurs first on the boiler design, should be strictly thermodynamic calculation and strength calculation in accordance with the requirements of GB50041-1992 "boiler room design specifications", the structural arrangement should be reasonable, material quality should meet the requirements. Boiler manufacturing, construction plans should ensure compliance with national quality boiler scale delineation. Boiler safety accessories should be complete, agile and reliable, and maintenance schedule, often check on the failure of the attachment timely replacement. Schedule for maintenance of the boiler, the outer part of the boiler maintenance, subject to the existence of timely repairs and reconstruction to ensure test quality standards. 2, prevention of fuel, gas hot water boiler furnace explosion at the point of blast furnace to double-check each gas line, oil line is tight (leak), pressure is normal, Installation and reconstruction of new oil and gas pipelines necessary to purge and clean. Check the ignition lead before the drum whether the fan has to take the air 5 ~ 10min, after ignition failure to analyze the reasons, and then restart the ignition process to take the air ignition. Boiler use permit and inspection certificate did not apply for the boiler, furnace stokers right to refuse point. Enterprises should choose a fireman permit manipulation of experienced fireman point-furnace work, fireman staff should strengthen the inspection tour, identify problems in time to prevent the flame; flame once found, should immediately cut off fuel. Boiler installation should be controlled protection device, comprising an automatic ignition, flame protection, automatic adjustment of combustion and the necessary alarm chain protection.

Factors that affect factors superheated steam temperature changes affect food factory superheated steam boiler plant food temperature variation effects superheated steam boiler temperature variation food factory, 1, 2 changes, and the air volume ratio of 3 changes, burner fuel properties and 4, 6, 7, change the saturated steam temperature change and desuperheating water flow operation mode change in water temperature in the pulverizing system 5, the heating surface cleanliness variation boiler load variations. Change in fuel volatile carbon content, calorific value and the like: 1. Variations in the nature of the fuel. When the roughening coal, fuel combustion in the furnace a long time, the center of the flame increases, the steam temperature. When the fuel water is increased, the heat absorption of water evaporation furnace, the furnace temperature is lowered, the increase in humidity, but also increases the volume of the flue gas, the flue gas flow increases, reducing the superheater heat radiation, convection superheater heat absorption is increased. 2. And change the air volume ratio: when increasing the oxygen content of the furnace, the low temperature due to heat absorption of cold air, the furnace temperature is lowered, the furnace outlet temperature. At a total gas flow is constant, a change will also cause shifts air distribution steam temperature. When a low flow rate is insufficient, part of incomplete combustion of pulverized coal, the flame center is moved upward, the furnace exit gas temperature. 3, changing the operating mode of the burners and pulverizing system: operating system will result in an upper pulverizing the steam temperature is increased, the swing angle of the burner changes, the change in center of the flame, steam temperature changes.

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