Comparison of heat efficiency comparison of two boiler vacuum boiler pressure boiler: 1, the vacuum boiler water volume is small, a water do not participate in the systemic circulation, the burner startup operation more often than atmospheric boilers, burner thermal efficiency is low, the degree of vacuum under the premise of stable, high-energy vacuum boiler thermal efficiency of 91%, the degree of vacuum devices to change operating subsidiary boilers instability will reduce the thermal efficiency. Operating costs can not be stabilized, as the vacuum pumping equipment and reducing the useful life of the control element, to increase the thermal efficiency of the failure rate will be lower. 2, boiler pressure hot water boiler volume greater than the vacuum, nor participate in a water circulation system, less the number of starts burner, burner high thermal efficiency, thermal efficiency of hot water boilers is 91%, and stable efficiency boiler and hot-water operation, no then the impact of multi-device failure rate, the structure is simple and durable. Comparison of the heat exchanger structure is built of a vacuum through a steam boiler heat exchanger, a short warm-up time. U-carrying stainless steel boiler tube heat exchanger, a cleaning may be opened flange, the other end can not be opened can not be completely cleaned thoroughly heat exchanger. 2, the boiler through the water pressure - heat exchange, the preheating time longer than the vacuum boiler water. Built using copper-line boiler tube heat exchanger, there are two flanges, more thorough cleaning. Compare the life of a boiler, the boiler due to the vacuum suction vacuum boiler work, less time to add water to reduce boiler fouling, corrosion and other problems oxygen, due to the boiler closed, water can not once a year dosing maintenance, boiler pressure has also taken advanced international scale, anti-corrosion measures oxygen, the actual life of the boiler and pressure boiler considerable, even if the long life of the body a little, boiler control elements, the service life of the burner can not be too high pressure boilers. 2, boiler pressure hot water boiler with a water softener equipment boiler fouling problems can be overcome, itself an indirect hot water boiler feed water is also very small, sacrificial anodes to reduce the oxygen corrosion protection internationally, annual boiler maintenance dosing may slow down steel oxygen corrosion, boiler plate and the outer heat insulation take a unique two-component embodiment, with water, acid and alkali resistance, oil and other functions, since the insulation adhesive material applied on the boiler body, with the boiler plate to prevent oxygen corrosion in air, vacuum boiler glass wool insulation, can not prevent oxygen corrosion of the steel sheet with air, so the life of the boiler water is not lower than the vacuum boiler 2 times higher, and the life of no basis.
In order to promote technological progress and sustainable development, improve environmental quality and protect public health, recently, the Liaoning Provincial People's Government of air pollutants for coal-fired power plants developed specific criteria (hereinafter referred to as the "standard"). This is the first time a set of policies Liaoning Province for air pollutant coal power plant.
"Standard" provides for pollutant discharge limits, surveillance and monitoring requirements within the jurisdiction of coal-fired power plant in Liaoning Province atmospheric and fugitive emissions control requirements. Since the implementation of the standards, air pollutant emissions coal-fired power plants all within the jurisdiction of Liaoning Province will be executed in accordance with the provisions of this standard.
2, since January 1, 2019, the emission limits of existing single output and more than 300MW generating units supporting the provision of a coal-fired power generation boilers execution table.
3, since 1 December 2020, the emission limits of existing single output 300MW generating units supporting the coal-fired power generation boilers and other power boilers as specified in Table 1 execution.
Sampling the exhaust gas (1) power plant, to be carried out in a predetermined position in accordance with the type of monitor emissions monitoring contaminants. In the discharge of pollutants should be set up to monitor the position of long-term monitoring holes, sampling platform and related facilities. When the sampling platform height from the ground greater than 40m, should be set by a lift platforms, lifts or other convenient and safe facilities. No elevator or elevator building coal-fired power plants, when the sampling platform height from the ground greater than 20m, should be set up safe, convenient electric monitoring equipment hoisting facilities.
Composition structure (3) continuous monitoring system atmospheric pollutants, technical requirements, test items, test methods and installation, commissioning, acceptance, operation management, data processing, etc. according to the provisions of HJ75 and HJ76.
(5) continuous monitoring system meter of air pollutants detection sensitivity, detection limit, and should meet the range of low concentrations of pollutant emission monitoring technical requirements, the concentration of nitrogen oxides include nitric oxide (NO) and nitrogen dioxide (of NO2), Determination of nitric oxide only has the ability to configure the analytical device of nitrogen oxides NO2 / NO converter.
(7) for coal-fired power boiler emissions of air pollutants sampling monitoring, sampling frequency, the sampling time and the operating load requirements,, HJ / T397 and related predetermined low exhaust gas concentration monitoring is performed according to specifications GB / T16157.
(9) shall be in accordance with the provisions of the enterprise "Environmental Monitoring and Management Measures" and the HJ819, HJ820 requirements of pollutant emissions and its impact on environmental quality around to conduct their own surveillance, monitoring and save the original records, public information.
Determination of air pollutants fired power plant analysis are shown in Table 2. After the release of the present embodiment national standard method of monitoring criteria pollutants, such as applicability to meet the requirements, the same applies to the determination of the corresponding standard contaminants present.
2, responsible for overseeing the management of this standard by the executive authorities and the standardization of administrative departments above the county level environmental protection. The results of the environmental protection departments at all levels and other relevant units in the enterprise supervision and checks can be instantly sampled or monitored the scene as determining whether acts of sewage meet emissions standards based on the relevant environmental protection and the implementation of management measures.
New classification of new energy boilers energy boiler is an energy conversion device, the energy input to the boiler chemical energy, electrical energy, a boiler with a steam output of the fuel in the constant heat, high temperature water or organic heat carrier. The original meaning refers to the pot on the fire heated containers that hold water heater which places combustion of the fuel, boiler and furnace boiler consists of two parts. Generating hot water or steam boiler may directly provide the necessary heat for industrial production and the people's life, by a steam power plant can be converted into mechanical energy, or through the generator converts the mechanical energy to electrical energy. Provide hot water boiler hot water boiler is called, is mainly used for domestic, industrial production also have a small application. Boiler steam is known as steam boilers, often referred to as boiler, used for power plant, ships, locomotives, and industrial and mining enterprises. Classification many new energy boiler, the boiler can be divided according to use, may be according to the structure, the type of fuel boilers points, but also by the form of the water cycle, the pressure classification. 1, by use classification boiler: boiler can be used for thermal power boilers and heating boilers. Power boiler comprising a power station boilers, marine boilers and boiler locomotive, corresponding to power generation, marine, and locomotive power dynamic. Heating boiler comprising a steam boilers, hot water boilers, hot tube boiler, stove and the heating medium heating furnace, to give a corresponding steam, hot water. Hot air and the heating medium and the like. 2, according to the body structure boiler Category: Boilers by the structure, divided into fire tube boilers and water tube boilers. Fire-tube boiler, including vertical and horizontal boiler boiler, water tube boilers and water tube boilers including horizontal, vertical, water tube boilers. 3, according to the boiler fuel type classification: according to the type of boiler fuel classified as coal-fired boilers, upgrade technology and oil-fired boiler and gas boiler coal-fired boiler, furnace oil and gas alternative --- pulverized coal boiler, gas boiler and other dual-use . Coal-fired boiler by combustion fired boilers can be divided into layers, and in fluidized bed firing boiler chamber. The latest fuel alcohol-based fuel boiler, he will greatly reduce the pollution of coal-fired boilers on the atmospheric environment. 4, classified according to the capacity of the boiler: evaporation amount of less than 20t / h is called a small boiler, evaporation to 75t / h is referred to as large boilers, evaporation of medium-boiler referred interposed therebetween. 5, according to the boiler pressure Category: 2.5MPa hereinafter referred to as a low-pressure boiler of the boiler, referred to above 6.0MPa high-pressure boiler, a pressure called medium pressure boiler interposed therebetween. In addition, ultra-high pressure boilers, boiler subcritical and supercritical boilers. 6, according to the form of boiler water circulation Category: boilers can be classified according to the form of water circulation boiler with natural circulation, forced circulation boiler (boiler including DC). 7, by device type classifier: can be divided package boilers, boiler assembly and bulk boilers. In addition, the form wall boiler, vacuum boilers and boiler modules.
Characteristics of hot water boiler described in Henan fast boiler gas hot water boiler with water in vacuo characteristics having different boiling points at different pressures working environment. At normal atmospheric pressure, the boiling point of water is 100 deg.] C, vacuum gas hot water boiler -0.07Mpa working in a pressure range of the water boiling temperature is lower than the corresponding 93 deg.] C, vacuum gas hot water boiler of the boiler to work under pressure. Combustion temperature of the water rises to the boiling temperature of the boiling water produced the same surface temperature steam, which absorb large amounts of heat volatilization. In this case, the water injected into the boiler heat exchanger, the cold water in the steam tube is an outer tube is heated into hot water then flows, steam is condensed out of the cold water cooled tube heat exchanger into water droplets. This completes the process water circulation in vacuo. 1. In the flue tube mounting closed fins increase the heat transfer effect, so that more concentrated arrangement. 2. Integral with a square configuration, personalized spraying, separation shape appearance. 3, large furnaces can techniques: effective to increase the heat radiation per unit area, to reduce NOX emissions. 4. Pure ensure high boiler water boiler water scaling, oxidation. Fives. All wet back shell using tricyclic structure, static heating, large heat balance. 6, all active control system, no staff on duty. Simple pulse level detection circuit unique structure, reliable performance. 8. Out of the water temperature display is doubled, easy to control operation of heating condensing vacuum hot water boiler and crumb. 9. High quality multilayer centrifugal glass wool insulation, heat losses are small. Vacuum hot water boiler with three gas-pressure safety protection system: automatic safety explosion relief valve: When the pressure inside the boiler continues to rise, the explosion-proof valve due to excessive pressure and burst, releasing the pressure inside the boiler, to ensure the safe operation of the boiler; a digital pressure switch : imported from Japan digital pressure switches, ready disassembly. Detecting the degree of vacuum changes the boiler, when the pressure is too high, the end of fire; explosion-proof valve automatic safety alarm: In special cases, when the pressure in the boiler becomes slightly positive pressure explosion-proof safety valve controlled vibration alarm, turn off the power boiler.
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