1, a total transformation time for two years, 2019-2020 years.
2, the transformation range: High-tech Zone, Furong District, Tianxin, Kaifu District, Yuhua District, Yuelu District administrative region, the city of hope Gaotangling Subdistrict high Tong Ling Area, Osan streets Yujia slope Area, Lake Daze in the region ban on burning streets, white sandbar streets, moon Island street, Jinshan bridge street, Golden Park street, Xingsha streets of Changsha County, Hunan Long street, Quantang streets, Langli streets, long queue streets, such as the scope of the existing town of Sha It is not less than 1 ton of steam (greater than or equal to the rated power or hot water boiler, organic heat carrier in the boiler 0.7MW) gas boiler (facility) (boiler equipment including special directory outside the range) low nitrogen unit owners embodiments transformation. Or more areas outside the area of self-implementation.
3, the transformation of the standard limits: the new replacement and overall gas boiler Changsha NOx emission is less than 30mg / Nm³; gas boiler (facility) was transformed with the nitrogen oxides emission concentration of less than 50mg / m³.
4, 2019 Task: In addition to the Furong District, Yuhua District, within a range of high-pollution fuel combustion zone ban other jurisdictions to start the transformation from June 2019, 50% complete gas-fired boiler (facilities) low nitrogen transformation and complete acceptance.
5, 2020 Tasks: Before the end of October 2020 to complete all gas boilers (facilities) within the range of high-pollution fuel combustion zone ban on low-nitrogen transformation and complete acceptance.
When heating gas boiler, is how to maintain a normal system operation: the gas hot water boiler according to the different needs, a different output temperature of hot water is often used for heating, is the preferred type of heating boilers. Gas hot water boiler 10 t CWNS7-95 / 70-Q, the water temperature was 95 ℃, return water temperature is 70 ℃, boiler water circulation is 240t / h. When used for heating, it can be used radiators, floor heating heating mode, the heat exchanger supporting the use of gas hot water boiler 10 t. When supporting a heat exchanger heating, boilers and heating systems are two separate water circulation system, independent pay, independent cycle.
Boiler "Run" Tips: in all the major parameters of the boiler, main steam pressure to maintain stability is the key which only the steam pressure is stable, the remaining parameters to stabilize. Unstable steam pressure, steam temperature, the water level will also change, so first of all start from the pressure adjustment. Vapor pressure is divided into an outer and an inner interference disturbance, our plant, i.e. outside the external disturbance load generally little change, so change in vapor pressure are changed within the furnace i.e. interference caused by operating conditions, so holding furnace combustion conditions the stability is the stability of the vapor pressure. If the combustion conditions change, such as wind than powder, coal calorific value and other factors change, a pressure change occurs, requires us to be adjusted, thereby changing into a stable state of the combustion furnace transient state conditions.
Boiler Plant softened water pollution to identify the type of boiler plants soften water pollution type of identification to identify the type of pollution to a comprehensive raw water quality, the design parameters, pollution index, running records, equipment performance indicators and Microbial be judged: ⑴ colloidal contamination: contamination occurred colloid when, usually accompanied by the following two characteristics: A, pretreatment microfilter clogging quickly, especially pressure increases rapidly, B, SDI value is usually 2.5 or more. ⑵ microbial contamination: microbial contamination occurs, the RO water through the apparatus and total number of bacteria concentrated water are high, usually have no maintenance and sterilization as required. ⑶ boiler calcium scale: can be adjusted depending on the raw water quality and design parameters. Of water in terms of carbonate, if recovery of 75%, adding the designed inhibitors, the LSI concentrate should be less than 1; LSI concentrate without scale inhibitor should be less than zero, typically It does not produce calcium scale. ⑷ available 1/4 inch plastic PVC pipe insertion component performance changes in different parts of the test assembly is determined. ⑸ determines the type of contamination of the change device performance. ⑹ available acid (such as citric acid, dilute of HNO3), and the cleaning effect The cleaning liquid is determined limescale, the cleaning liquid composition is further confirmed by analysis. ⑺ liquid cleaning chemical analysis: Take the raw water, cleaning liquid, cleaning liquid, three sample analysis.
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