What if there is wear and tear in the natural gas boiler? Detailed inspection is the key, as is fuel management. According to the operation condition and time of natural gas boiler, we can plan reasonable wear inspection. When using fuel, we strictly control the granularity of coal and limestone. The size of bed material should be strictly controlled. Boiler waste should be disposed of. The waste residue of the boiler must be treated before it can be discharged. Natural gas boilers should be installed where heat is used, easy to install. The hot pipe should not be too long. It should have a good insulation. The pipe shall be tilted properly from the hot water outlet to the end. The water supply source shall be equipped with a control valve. To discharge exhaust gases, the chimney of the natural gas boiler should extend to the outside and the outlet should be 1.5 to 2M higher than that of the boiler. If we want to reduce the influence on the water wall tube, we can adjust the air pressure and air volume properly, and effectively reduce the wear of the water wall. Check time is usually standby or downtime. Items to be examined include wall wear, furnace sealing and smoke leakage. In case of wear and tear, repair and welding are required to ensure the normal operation of industry steam boilers prices. Generally speaking, before combustion of natural gas boilers, fossil fuels, fossil fuels and bed and circulating materials should be filled in the combustion chamber at wind speed and strength. And stiffness of the air convection under full integration. Furnace bottom air device, inner core area upward. The movement in the outer ring region flows downwards along the water wall of the furnace, thus prolonging the residence time of the coal particles in the furnace. Mineral particles, a large number of ash powder and smoke contain a large number of fly ash particles, these continue to lead to rapid wear of water-cooled wall tube, make wall thickness wear thin, resulting in wear.
Boiler "four" leakage phenomenon determines: whether the output of hot water, steam or thermal oil, and regardless of using coal, oil, gas, biomass or power boiler, has the following "four", respectively, of boiler waterwall tubes, superheater tubes, reheater tubes and economizer tubes. It covers all four pipes of the boiler heating surface, the internal pressure of the working fluid bear, may be external to bear the high temperature, harsh environment corrosion and wear, excessive reconcile between water and fire, where the energy is concentrated is passed .
This year, Hubei Province, will continue to carry out prevention and control of air pollution control, effectively promote the province's environmental air quality improved, and issued the "2019 Annual Hubei ecological system of air pollution prevention and control program of work", as follows.
First, ultra-low emissions and actively promote the transformation of key industries. The province's new coal-fired thermal power units fully implemented ultra-low emissions standards. Actively promote small coal-fired thermal power ultra-low emission transformation, Wuhan, Xiangyang, Yichang and other places to complete before the end of 2019. Circulating fluidized bed boiler unit to achieve ultra-low emissions before the year 2019, tobacco dust W flame boiler units, to achieve ultra-low sulfur dioxide emission limit requirements. Ultra-low emissions and actively promote the transformation of the steel industry, the whole process to reduce air pollutant emissions.
Second, the depth of key industries mentioned standard upgrade. Promote the implementation of major cities in key industries especially emission limits, strictly enforce the "Notice on the implementation of some key cities in particular air pollutants emission limits" (Provincial Environmental Protection Bureau Bulletin 2018 No. 2), advance planning to enact governance project, and accelerating coking industry desulfurization and denitrification projects. According to the national unified deployment and actively carry out industrial furnaces governance special action. Complete waste discharge permit issued in accordance with the work list management requirements.
Third, the total coal consumption in key areas to promote control. Actively cooperate with relevant departments to implement controls total coal consumption in key areas, focusing on reduction of non-coal for electricity. With the relevant departments to promote the commercial coal quality control and supervision of bulk coal sales, strengthen the management and control of coal consumption, promoting the use of clean coal.
Fourth, the optimal adjustment of high-pollution fuel combustion zone ban. Control Department of Ecology Environment "high-pollution fuel directory" to improve the demand by the City People's Government in accordance with the ambient air quality, energy consumption structure and affordability, local conditions choose ban combustion zone ban burning of the fuel mix category, supervise the implementation of the relevant control requirements. Urban cities and states to complete high-pollution fuel combustion zone ban optimal adjustment before the end of 2019.
Fifth, to carry out rectification of coal-fired boilers. Carry out coal-fired boilers out of looking back, resolutely combat the resurgence of acts of the boiler has been eliminated. The county level and above urban area actively eliminate 10 tons of steam per hour coal-fired boilers and furnaces and tea, operating the stove, grain storage and drying equipment, coal-fired facilities, in principle, to a new 35 tons of steam per hour of fuel coal boiler. Actively promote the upgrading coal-fired boilers environmental protection facilities renovation and construction of facilities on-line monitoring, adherence to the "gas will change," the principle of steady progress "from coal to gas."
Fuel gas boiler automatic instrument sets the control means are included which according to the "industrial boilers Complete supply" and provides fuel gas boiler automated instrument packages supply shall include at least the following: (1) evaporation of 4t / h and 4t / h or less boiler 1 ) detection. Water gauge, vapor pressure gauges (including saturated and superheated), water pressure gauge, water thermometer, thermometer smoke, steam flow rate calculation (including less than evaporation lt / h boiler). Oil temperature, oil pressure, oil level indication, calculates fuel (gas boiler as temperature, pressure, gas), furnace exit gas temperature indication. Evaporation of 4t / h boiler flue gas oxygen content should have, furnace pressure, temperature economizer export indication. 2) regulation. Position of formula (only for non-economizer of the boiler) or continuous feedwater automatic control, automatic adjustment of a combustion boiler the combustion of heavy oil should automatically adjust the oil temperature, air pressure gas boiler there should be automatically adjusted. 3) alarm and protection. High and low water level indication and alarm, low water level limit protection, over-pressure steam indication, alarm and protection, flame protection furnace, fuel gas overpressure protection or low temperature alarm and protection. 4) Other. Auxiliary electrical control box, gas boilers should be equipped with explosion-proof electrical control equipment. (2) evaporation of 6t / h and above 6t / h boiler 1) detected. Water gauge, vapor pressure gauges (including superheated saturated), water pressure gauge, water thermometer, thermometer, smoke, water, steam pressure, water pressure indicator, calculated water flow, steam flow indication, recording and computing, oil temperature, oil pressure, oil level indication, indication and calculating the amount of oil (gas boiler as temperature, pressure, gas), economizer inlet and outlet water temperature indication, furnace exit gas temperature, exhaust gas temperature, air pressure, furnace pressure indication, Sheng Mei an inlet, an outlet indicated negative, indicating flue gas oxygen content, there is an outlet air temperature should be indicative of the boiler air preheater, the boiler superheater, there should be recorded and the superheated steam temperature indication. 2) regulation. Continuous automatic adjustment of water supply, drum, induced draft fan damper flap opening remote control, remote pump control valve (an intake gas boiler control valve), a heavy oil combustion boiler should automatically adjust the oil, gas boiler should automatically adjust the air pressure, there is superheater boiler there should automatically adjust the temperature of superheated steam. 3) alarm and protection. High and low water level indication and alarm, low water level limit protection, over voltage protection and alarm indication of heart steam, oil accident alarm system, furnace flame protection, fuel gas overpressure protection or low temperature alarm and protection. Boiler superheater should have more limited temperature of superheated steam and an alarm indication. 4) control and the other. Drums, Fan, and start and stop the pump interlock control program, drum, fan baffle opening damper indicated, shall be provided with explosion-gas boiler electrical control equipment.Free Chat
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