high efficiency gas fired hot water boiler for sale

high efficiency gas fired hot water boiler for sale

In the national standard of water quality standard, the water quality index of high efficiency fired hot water boiler for sale stipulates that the total hardness of water supply for chemical treatment outside furnace is less than 0.6 mmol / L. In recent years, in order to reduce the operating cost of heating units, some hot water gas-fired steam boilers have been overloaded due to the use of class Ⅲ bituminous coal as fuel instead of class Ⅱ bituminous coal designed to replace the designed type Ⅱ bituminous coal. During the maintenance in summer, it is found that the overloading boiler water wall tube fouling problem is more prominent, some boilers even occur tube burst accident. Why is heating hot water boiler overloaded, scale and even burst tube? Because the calorific value of class Ⅲ bituminous coal is higher, the type Ⅲ bituminous coal of the same weight is burned instead of the designed class Ⅱ bituminous coal. Bituminous coal increases the circulation of boiler riser is not absolute equilibrium, the geometric difference of riser and the heat load are different, so there is inevitably the deviation of flow rate between the risers. Due to the overloading operation of the boiler, some riser tubes are easy to overheat boiling because the flow rate is small, and the wall temperature is higher than the designed wall temperature, so that the scale and even the tube burst are easy to occur. How to prevent the boiler from scaling when overloaded? The heating hot water boiler operates under overload because of the scaling after the superheated boiling. Steam is produced in the process of superheated boiling. The water quality requirement of gas steam boiler is less than 0.03 mmol / L, which is much lower than that of hot water boiler. Water quality requirements. Based on the above reasons, the feed water hardness of heating hot water boiler is reduced, and the scaling phenomenon is eliminated by reducing 0.6mmol/L to 0.03mmol/L.

You have to know the energy consumption of 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.

How to prevent high efficiency fired hot water boiler for sale hot water boiler explosion released belong to special equipment, but also a high temperature and pressure of thermal equipment, there will be some failures during operation, these are normal, but if not handled properly is likely to occur hot water boiler explosion. So, for safety equipment and personal safety, we have to understand some common sense prevention hot water boiler explosion. M & E network in the boiler provides the following two methods: 1, the hot boiler explosion accident prevention boiler should be designed in strict accordance with the requirements of thermal calculation and strength calculation, structural arrangements should be fair, the selection should be qualified. Manufacture of boilers, construction plans should be to ensure conformity of the quality of the boiler delineated. Boiler safety accessories should be complete, agile and reliable, and maintenance schedule, often check on the failure of the annex should be replaced. Maintenance schedule by part of the boiler to the boiler, external maintenance, the existence of a timely topic for repair and reconstruction, to ensure test quality. 2, fuel, gas hot water boiler furnace explosion prevention hot water boiler furnace point 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, then 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 have a great fireman layout of manipulating evidence of experience points furnace fireman, fireman staff should strengthen the inspection tour, identify problems in time to prevent stalling, stalling once found, should immediately cut off fuel boiler installation should be controlled protection, including automatic ignition , flame protection, automatic adjustment of combustion and the necessary alarm chain protection.

Cade Shopping Mall is located in central Shanghai Hongkou District, Shanghai Daily larger flow of people in the region. The introduction of Shanghai air pollutant emission standards, boiler flue gas emissions of nitrogen oxide emissions to less than 80 mg / m, Shopping Mall a coal-fired boilers have been used for many years, NOx emissions far super to this request, the urgent need to replace more environmentally friendly low nitrogen emission boilers. Other units through the use of fast Boiler introduction and understanding, determined and fast boiler to achieve cooperation, party fast to their specific needs to recommend one condensing gas high efficiency fired hot water boiler for sale of a 4.2MW for heating needs of the shopping center.

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