About hot water boilers including hot water boiler electric water boilers, hot water boiler fuel, gas hot water boilers and coal-fired hot water boilers, hot water boilers that produce hot water boilers, is the use of the thermal energy released from fuel combustion or other thermal energy (e.g., electrical energy, solar energy, etc.) the water was heated to a nominal temperature of a thermal device. "Special Equipment Safety Supervision Regulations" as defined in the boiler is the use of various fuels, electricity or other energy sources, the costumes, the liquid is heated to a certain parameter, and external heat output devices. Which is defined in a range equal to or greater than the volume of the pressure of the fully automatic commercial fired steam boiler 30L; outlet pressure is greater than or equal to 0.1MPa (gauge pressure), greater than or equal to the rated power and the pressure of the hot water boiler 0.1Mw; organic heat boiler. From "Special Equipment Safety Supervision Regulations" Uses People's Republic of China: There are heating and hot water boiler bath for two purposes. Hot water boiler by circulating hot water circulation pump hot water holding tank, the tank hot water heating cycle can be achieved bath object; hot water boiler by circulating hot water circulation pump heating conduit, through the heat sink (radiator) people can achieve heating requirements; hot water boiler and hot water circulating pump with heat exchanger can achieve the dual function of bathing and heating using inspection items include: checking in the internal boiler inspection and ready to use, furnace and flue boiler inspection accessories check check, auxiliary equipment automatic control system, check the combustion equipment, check the auxiliary heating surface of the hot water boiler must be done before running some tests, these tests are quite a lot of us, it is possible because of our neglect causing very serious consequences. Therefore, we must forestall, be sure to carefully check the following before the hot water boiler operation. 1, including the use of internal inspection and boiler ready. 2, inspection, and furnace fouling and debris inside the flue in the furnace and flue should be cleaned. Flue duct and damper, the shutter must be complete and compact, flexible switch, opening and closing accurately indicated. 3, check the boiler accessories, check the safety accessory is intact; cock is rotating flexible, easy to use; all kinds of instruments and controls should be complete, good, clean. After passing the examination, should the gauge cocks in working condition. 4, check the automatic control system. 5. Check the accessory device. 6, inspection of the combustion apparatus, the combustion apparatus is intact inspection; mechanical transmission system, coal handling system, the ballast system test switch normally; spring-loaded safety level of a gearbox should be appropriate, well lubricated; coal shutter indicate the correct scale. iron eagle neat, well, turn the ballast plates full, flexible movement. 7, the auxiliary heating surface of the inspection, check the auxiliary device (fan, blower, pump, etc.) are firmly connected coupling; proper belt tension triangle; oil should be good enough; cooling water flow. After passing the examination, installed security guard, respectively, commissioning, and note the current when idling.

According to fuel (electricity, oil, gas), oil-fired gas boiler can be divided into three kinds: electric fully automatic commercial fired steam boiler, oil-fired steam boiler and gas-fired steam boiler. According to the structure can be divided into vertical steam boilers, horizontal steam boilers, small and medium-sized steam boilers are mostly single, double-return vertical structure, large-scale steam boilers are mostly three-way horizontal structure. The following is the boiler pressure fire shutdown time more than 6 hours, the boiler main steam valve should be closed after a period of pressing fire, opening the superheater outlet header drain valve, to cool the superheater. If the air pressure rises after the main steam valve is closed, it can be used to lower the pressure of the boiler by feeding the water into the boiler and simultaneously discharging the water. Press. When the boiler resumes operation, it needs to go through the pressure rise and protect step 2. There is still steam pressure in the pot during the shutdown period of the pressure fire, so it is still necessary to pay attention to monitoring and make the boiler keep the allowable water level 3, the boiler with cast iron gas saving gas, after the boiler stops feed water, The gas-saving flue baffle shall be closed, the side-hearth baffle opened or used in the circulating pipeline to stop the water temperature in the gas-saving area exceeding the specified value of 4, the proper discharge shall be carried out during the shut-down of the furnace under pressure fire, and the sediment in the furnace shall be excluded. The operation of circulating water pump should not be stopped immediately after the furnace shut down. The circulating water of network should be kept circulating in the system for a period of time, and the water temperature of boiler outlet should be lowered below 50oC. The operation of circulating water pump can not be stopped until the operation of circulating pump is stopped.

General Secretary Xi Jinping fully implement the important instructions on promoting clean northern winter heating, Xi Jinping adhere to the new era of socialist thought and nineteenth spirit of the party with Chinese characteristics as a guide, actively and steadily make 2018--2019 Nian northern clean heating season Heating work to ensure the safety of the masses warm winter, the energy Bureau of Beijing, Tianjin, Hebei, Shanxi, Inner Mongolia, Liaoning, Jilin, Heilongjiang, Shandong, Shaanxi, Gansu, Ningxia, Xinjiang, Qinghai, Henan province (autonomous regions and municipalities) and Xinjiang production construction Corps development and reform Commission (energy Board), Beijing Municipal Administration Commission, nuclear, China Guangdong nuclear power, China petroleum, China petrochemical, China national Offshore oil, national grid, Inner Mongolia electric power, China Huaneng, China Datang, China Huadian, the national energy State power investment Corporation, China Three Gorges, SDIC, China Resources coal, China electric power construction, China can build Group (company), power planning and Design, Water Resources and Hydropower planning and Design and other regions and major companies asked the following notification.

First, a solid grasp of clean heating embodiment implemented. At present, the country has been in accordance with the "Clean northern winter heating plan (2017-2021 years)" (hereinafter referred to as "Plan") requires the preparation of a clean heating embodiment of their respective regions, to develop a clean heating annual work plans.

Second, and steadily push forward the "coal to gas," "coal to electricity." Should adhere to the electric power, the gas should be air, should the coal is coal, the heat should be hot, for a given change, after the first stand break. "Coal to gas," gas will be to change, to implement gas supply further implementation of the transformation. All localities should earnestly fulfill the main responsibility to protect people's livelihood gas, good supply in the region decomposition of the implementation, coordination arrangements, rational use.

Third, actively expand the scale of renewable energy heating. All localities should combine resources, to improve geothermal resources exploration and development efforts under the premise of no damage to the ecological environment, simplifying formalities projects, improve the supporting policies, increased geothermal heating area.

Fourth, push forward clean coal-fired central heating. Coal should adhere to the coal, clean coal-fired central heating expanding area. By localities should give priority to production, as emergency reserves peaking power, improve the heating capacity of the unit, expand heating radius, planning and construction of people's livelihood back-pressure thermal power generating units, etc., to further encourage ultra-low emission cogeneration clean heating. Combined with coal production capacity to deploy a unified, rational part of the release of advanced coal production capacity, protect the livelihood of coal for heating. Greatly enhance the environmental performance of coal-fired boiler room, implementation of the "planning" on the ultra-low emission coal-fired boiler in City requirements.

Fifth, keep the masses warm winter safety bottom line. Around the implementation of clean energy supply in new heating facilities, safe and stable operation before, never allow removal of the original heating facilities. Better use of coal, electricity, natural gas and other energy sources for UNPROFOR, users still need to use coal for heating, a really good job of clean coal supply security work.

Sixth, to explore innovative clean heating mode. To clean around heating combined with practical, innovative institutional mechanisms to optimize the business environment, further liberalization of energy, heat production and supply areas, and guide social capital into clean heating market, encourage enterprises to carry out technological innovation and management innovation, the development of new technologies, new models The new format.

Seven, strengthen supervision clean heating work. According to "planning" urged all localities to innovative regulatory measures and means to closely follow the progress of work, mastery goal of task completion and work to promote the practical difficulties, in conjunction with the Energy Bureau sent regulators to organize the supervision and inspection and appraisal. All localities must submit the plan to the Energy Board by December 15 to submit the report within two weeks after the end of the heating season.

The essay serve a documented basis for joint project of erection and operation of biomass residue firing CHP (Combined Heat and Power) unit. 58 tons/hour of steam at 12 barg are generated in few heavy oil firing boilers and consumed in production process. The basic assumptions are that saw dust or/and wooden chips with LHV (Low Heating Value) 18,000 kJ/kg will be fired in a fluidized bed boiler producing about 30 ton/hour steam (about a half of needed process steam). The steam flow, passing through a back pressure turbine, will generate electricity corresponding to difference of enthalpies of fresh steam generated in the boiler and of one needed for process. From the turbine outlet the steam will be used, as today, for the technological process of the factory.