The oil in the gas-fired boiler, it carries on the classification according to the partition, has what kind? How to avoid the problem of ash accumulation in boiler superheater? And, with regard to boiler this important website product, what other questions need to be explained and answered? The main purpose of raising these questions is to solve them thoroughly so that we can understand them clearly and have a correct understanding.
01. What are the specific types of oil in a gas-fired boiler, if it is classified according to its formula? If oil in gas-fired boilers is classified by formula, then it can be divided into two categories: alcohol-based and petroleum-based. Moreover, alcohols are usually composed of methanol, or ethanol, and other high-carbon alcohols, while petroleum is a mixture of various waste oils and light oils, with a calorific value higher than that of alcohols. 2. How to avoid ash accumulation of boiler superheater? In order to avoid ash accumulation in boiler superheater, attention should be paid to the rationality of flue structure and the correct flow direction of flue gas when passing through the superheater. In addition, soot blowing can be carried out frequently, so that this problem can be avoided, and at the same time, ensure that the boiler can work smoothly and normally. 3. Lighting requirements for water and pressure gauges in gas-fired boilers and contents of boiler nameplates
A few days ago, Handan City issued "on the deadline to complete the nitrogen oxide gas boiler governance" (the "Notice"), clear objectives, tasks nitrogen oxides governance gas boiler, expected to be completed more than 10 steam tons of gas before the end of October this year, low NOx combustion boiler reconstruction. "Notice" to the objectives and tasks of nitrogen oxide gas boiler control, time requirements, safeguard measures have been clearly defined.
First, the implementation of the transformation of ultra-low emissions
By the end of June 2020, the existing non-electrical gas steam boiler, hot water boiler, Stoker stoker furnace and completed the transformation of a low nitrogen combustion, soot, sulfur dioxide and nitrogen oxides reach 5mg / m³, 10mg / m³ , 30mg / m³, the new gas combustion boiler synchronizing means and is mounted low nitrogen meet emission standards. 20 tons of steam / hour or more gas-fired boiler installation atmospheric pollution automatic monitoring facilities, and networking with the environmental protection department, install a distributed control system (DCS system). 20 t steam / hour to be mounted gas-fired boiler exhaust gas nitrogen oxide analyzer.
Second, the phased completion of the task of transformation of governance
10 before the end 2018, to complete the combustion of the transformation Boilers nitrogen over 10 tons of steam, to complete the 1-10 tons of steam (having a steam tons and 10 tons of steam) combustion transform low nitrogen gas boiler before the end of October 2019, 2020 at the end of 6 before completing the transformation of low-nitrogen combustion gas steam boiler 1 ton. Counties (cities, districts) according to the actual situation, to be completed in advance of nitrogen oxides governance gas boiler.
Third, both subsidies and penalties
"Notice" requirement for acceptance of project management, to give appropriate subsidies comprehensive financial subsidies to control air pollution. Due to the unfinished task of governance be ordered to stop production of governance. For excessive emissions, fraud, unauthorized outage environmental protection facilities, waste-water treatment snuck issues such as rectification and punishment according to law; wrongdoing, be held criminally relevant personnel.
WNS type gas steam boiler system control principle: ①, after WNS type gas steam boiler on the power switch, click on the pump control switch open position, after boiler feed water rises to the normal position, click-burner power switch, clicking the start button, the control system power is on, the burner into the working state, according to the operation program for the controller, to be re-ignition burner fires into the combustion state, the boiler enters normal operation this stage. ②, high output level when the water level rose to a high level alarm signal indicator light, when the water level rises to the pump stops running + 25mm, the water pump when the water level falls -25mmm automatic restart, when the water level falls -50mm, outputs a low level alarm indicator light, with bell sound, and cut off the power to the controller to achieve protection shutdown, -75 mm when the water level falls, the output signal of low water level indicator light. ③, when the pressure is raised 0.73MPa, the output signal of the first indicator light overpressure, combustion conditions and off the controller circuit, the controller stops the shutdown. Output when the pressure rises above a second overpressure 0.75MPa signal issued bell sound, alarm and cut off the power supply control system implemented emergency stop. Regulating the pressure when the pressure exceeds the upper limit, the controller output signal of a small fire fire closed valve, a valve to open the small kerosene ignition burner. When the lower limit pressure drops below the regulated pressure, the controller outputs the fire signal to open fuel valve fire, the fire to burn. ④, after the failure of the burner failure occurs, the burner control valve is automatically shut down to stop the oil combustion. Vertical coal-fired steam boiler structural features
Electric steam boiler of the heating process due to elevated water temperature within electric steam boiler, heating and evaporation of the bubble surface of the metal wall temperature begins to rise at any time. There are heating and america produce-fired hot water boilers bath for two purposes. Hot water boiler by circulating hot water circulation pump hot water holding tank, the tank hot water heating cycle can be achieved bath object; hot water boiler by circulating hot water circulation pump heating conduit, through the heat sink (radiator) people can achieve heating requirements; hot water boiler and hot water circulating pump with heat exchanger can be achieved bathing and heating dual function. Steam boiler is an energy conversion device, the energy input to the boiler fuel chemical energy, electrical energy, thermal energy and other forms of high temperature flue gas, and after converting the boiler, the steam output having a certain outside thermal energy, high-temperature hot water or an organic carrier. Since the bubble greater wall thickness, in the electric boiler of the heating process, the thermal stress is a major problem, it is necessary for the thermal expansion of the bubble temperature and thermal stress study. At the same time, also considering the overall thermal expansion problems, especially an electrical heating surface tube steam boiler, since the thin wall thickness, length of problems in the process of heating the whole of the problems of thermal expansion, it should also be noted that the thermal stress. Prevent inadvertent failure caused. In the process of generating steam and processing the thermoelectric pressure steam boiler, when the temperature is higher than the outer wall temperature of the inner wall, the upper wall at a temperature above the wall temperature, the wall thickness and the temperature difference between the upper and lower walls of the bubble there is a temperature difference, i.e., bubble the inner wall temperature above the temperature of the outer wall, the wall temperature is higher than the wall temperature, the temperature difference between the thickness of the bubble exists in the thickness direction, the upper and lower walls of the larger temperature difference between the bubble, when the temperature is higher than the outer wall temperature of the inner wall, the wall temperature is higher than the wall temperature. In order to prevent excessive thermal stress, it is necessary to gradually increase the pressure of the boiler. In the process of electric spark and boost steam boiler, the steam parameters of the boiler components, water and conditions are changing. Therefore, in order to effectively prevent the occurrence of abnormal conditions and other hazards, it is necessary to arrange a variety of instruments to monitor closely the instruction of professional change. Within the normal allowable range, but also the reliability and safety of various instruments, valves and other components was evaluated by adjusting the process parameters pressure, temperature, water, etc., in order to fully guarantee the security of the electric steam boiler stable operation. The higher the electric steam boiler pressure, the higher the energy, the corresponding steam plant, pipes and valves can withstand the pressure will increase, which also makes the maintenance and protection requirements of the steam boiler is relatively high. In the production and transportation, and the ratio of heat loss will increase the share of the steam.
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