type natural gas water tube boiler

Heating and haze rule can not be reconciled? Try how to clean the heating! Winter is coming, the use of heating type water tube boilers are increasingly being used, then in the process, there is a problem that is serious environmental pollution, fog and haze frequently. In the boiler use, high emissions of coal-fired boilers belong to, so if you want to solve this problem at its roots, so to clean energy alternative to coal-fired heating scattered as the main direction is imperative. Currently in the boiler industry more clean energy with biomass, natural gas, electricity and so on, is more use of natural gas, process gas heating boiler in operation has the following advantages: (1) Due to the cleaning of natural gas may reduce the emission of pollutants, thereby reducing the frequency of incidence of fog and haze. (2) be used as the case of boilers, piping erection, conveyance of natural gas fuel, the processing cost savings, labor, transportation and a portion of the coal. (3) the use of the boiler in terms of, you can make hot water and room heating speed of the user's application has improved to some extent, and so on. Of course, gas heating boiler only current application of a more specific alternative energy but also according to the actual situation of selected coal energy, such as the northern region, before the coal-fired boiler broader market, but with the national environmental policy We were introduced, and the characteristics of the northern region, most of it for the new biomass energy boilers commonly used, followed by electricity and natural gas to replace the gas boiler. In short, the use of boilers in the process of heating effect to be achieved, but also to achieve the cleaning performance for the haze governance countries also make the appropriate contribution.

Several problems into a coal-fired type water tube boiler fuel gas boiler fired boilers changed several issues should be noted that the fuel gas boiler: fuel oil (l) high temperature corrosion of the fuel used in the boiler, containing an organic salt of a metal element as sodium, vanadium class, after combustion of the low melting point eutectic oxide crystals, generally of about 600 ℃, or even lower. These oxides sublimation at a high temperature furnace, then condensed in a lower relative temperature of the heated surface to form a high temperature corrosive fouling. Is characterized by high temperature corrosion: the metal began to appear at temperatures in excess of 580-620 deg.] C, the higher the temperature, the faster the etching. High temperature corrosion measures to prevent: l) the use of additives. Mainly magnesium, calcium oxide, hydroxide or dolomite (CaC03, MgCO3) and the like, these additives can generate a high melting point compound with the component acting in a high temperature fouling, the fouling becomes loose and shape, so as to avoid or mitigate high temperature corrosion. 2) use high temperature materials with good corrosion resistance, high temperature corrosion resistant chromium steel is better than the nickel-chromium steel. 3) coated with a protective film. Susceptible to corrosion in high temperature heating surface ceramic surface coating, a silicon carbide or silicon nitride special coatings, the heated surface may be aluminized other treatment to improve its high temperature resistance. 3) coated with a protective film. Susceptible to corrosion in high temperature heating surface and other surface-coated ceramics, silicon carbide, silicon nitride, or special coatings, the heated surface may be aluminized other treatment to improve its high temperature performance rot cloud. (2) low temperature corrosion in fuel sulfur generated during the combustion S02, since the fouling atomic oxygen present in the furnace and the convection heating surface and catalytic oxide film, SO2 is further oxidized to S03. S03 and H2S04 vapor in flue gas generated in conjunction with, the dew point of the flue gas containing the sulfuric acid vapor is greatly increased, when heated wall temperature below the dew point of sulfuric acid vapor will condense on the walls, and corrosion of the metal wall. Usually low temperature corrosion It occurs at the end of the air preheater of the boiler. Thus when burning high sulfur fuel, care must be taken to prevent low temperature corrosion. Prevent low temperature corrosion measures are: 1) low oxygen combustion. When the excess air at the outlet of the furnace lag coefficient down to 1.10 or less, for sulfur of the fuel oil used, the dew point of the flue gas will be significantly decreased, so as to avoid or mitigate low temperature corrosion. 2) use of additives. Sprayed into the furnace or flue additive in the curb generation of SO3 and to reduce the flue gas dew point temperature. Common additives solid (dolomite, limestone, magnesium oxide, and some special compound), the liquid (aqueous magnesium chloride solution, some oil soluble magnesium, calcium, zinc naphthenate compound) and a gas (ammonia gas, ammonia, three different ring) three categories. 3) raising the thermal wall temperature, so that it is higher than the dew point temperature of flue gas. Commonly used methods are: hot air recirculation inlet temperature of the air preheater increase; the installation of the heater core, air is heated by steam, a low temperature air preheater horizontal structure, the level of a horizontal pipe line is arranged an air preheater , the air flow in the pipe, the pipe between the smoke flow, erosion due to the lateral wall of the flue gas, the flue gas side heat transfer coefficient is increased to increase the wall temperature, more generally vertical wall temperature of the air preheater increase 20 ~ 25 ℃. 4) corrosion-resistant materials or corrosion resistant coating materials include glass, ceramics and the like; an anti-corrosion coating and had tried to enamel-coated surfaces like special steel anticorrosion paint. 5) timely sootblowing operation, and therefore should be a reasonable arrangement sootblowers. Fire and explosion of fuel failure (3) heating surface of the tail or incomplete combustion of atomized droplets gather in the tail of the heating surface, when it reaches ignition or explosion conditions, i.e., ignition and explosion may occur. The tail heating surface fouling aggravated by the possibility of aggregation of the oil droplets. Therefore, when coal-fired boilers into oil-fired boiler, burner should be correct and rational selection and delivery, and strictly develop from the induced draft fan. Rules and procedures for shutdown and normal operation to ensure good fuel atomization, with the wind reasonable. At each of the heating surface is arranged to be reasonable sootblowers. (4) determining the dew point temperature of flue gas is determined dew-point temperature of the flue gas has practical significance for the design and operation of flue gas dew point temperature factors influence mainly sulfur fuel ink, excess air coefficient, water vapor in the flue the amount of sulfur / cement ratio and combustion.

You have to know the energy consumption of type water tube boiler problems (control measures exhaust gas temperature of the boiler) 1, operational measures (1) unit load changes, to adjust air flow and pulverizing system operation mode, keeping the excess air ratio most suitable furnace. (2) time to adjust the bottom seal tank inlet valve, suitable to ensure the seal tank water level. (3) changes in coal quality, timely adjustment of combustion, complete combustion and ensure proper furnace flame center. (4) heating surface periodic soot blowing and slag, maintaining heating surface clean. (5) maintaining a suitable gas velocity, the heated area ash reduced tail. (6) Check the class auxiliary burner throttle opening, to ensure there is sufficient oxygen in the combustion. (7) raise the water temperature. 2, boiler routine maintenance and testing (1) combustion optimization and adjustment tests, to determine the economic coal fineness different coal. (2) periodic testing coal fineness, abnormal timely adjustment process. (3) regular air preheater leakage test, and remove air preheater leakage. (4) Always check the furnace to see the fire hole, furnace wall, bottom seal, identify problems and timely closure, reducing boiler leakage. (5) Strengthen routine maintenance soot blowers to closely monitor motor current soot blowers, for soot blowers and often stuck in the barrel bending furnace and other defects timely treatment to ensure soot blowers investment rate above 95%. 3, repair, downtime (1) Check the burner damage, to replace or repair damaged nozzles, the nozzle and the bluff body. (2) heating surface, the flue fouling, slagging cleaning up. (3) adjusting the fuel to determine the secondary air and the opening degree position of the damper flap. (4) Health Check flue gas damper, the damper position adjusting checked. (5) roof sealing, see the fire hole, Manhole, bottom seal tank leakage inspection governance. (6) replacing air preheater wave plate, rinsing, the check processing sector plate, curved plate is deformed, and bearing wear off defects, defect inspection process automatic adjustment mechanism sealing gap. (7) Pulverizing System: Mill off the door, the hot air and the cool air shutter opening degree adjustment. Roller cover and bowl mill liner replacement, the spring biasing force and gap adjustment. Import a fan baffle opening adjustment. (8) the flue expansion joint leakage defect inspection process. (9) soot blowers and related equipment check process. 4, transformation (1) Burner deformation, wear process, replacement, and a bluff body concentrator ceramic sheet, and silicon carbide wear measures. (2) the heated area ash slagging comprehensive inspection process. (3) waterwall, economizer, reheater, superheater tube cutting test monitor segments corrosion and scaling inside the case. (4) boiler, air preheater Leakage leak plugging governance. (5) on the "four leak" taken by plugging repair. (6) backpass wear parts wear welding process and do. (7) heating surface (economizer, superheater, reheater) for transformation, reduce exhaust gas temperature. (8) to do a good job adjusting the air according to test results dynamic field. (9) boiler, the flue joints and other advanced seal plastic material, to reduce leakage.

The fact that we determined to achieve cooperation with the fast type water tube boiler is a very wise decision, after a period of time put into the boiler efficiency significantly much higher than our original boiler efficiency, significantly reduce fuel costs, the economic benefits brought by the boiler is obvious. --customer feedback

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