Eliminating the problem of pressure test: GB150-1998 "Steel Pressure Vessel" Article 3.9 states: "to not make container pressure testing in accordance with the provisions of 3.8, the design unit should put forward measures to ensure the safe operation of the vessel, and note on drawings Ming "There are many standard deviations the user's understanding of this provision, is summarized in the need to clarify the following two questions: First, under what circumstances can relieve stress test? Second, the measures may be required after relieve the pressure test? When the catalytic cracking unit with a regenerator and a large reactor and the heat insulating layer can not withstand those based hydraulic test: in fact, only relieve pressure test performed Spot welding large pressure vessels for pressure testing the impossible, such as water by weight of the pressure vessel and the like. In other words, the reason why the pressure test exemption, because they do not have the container or a pressure test, or simply not pressure tested. In short, rather than eliminating means you can not do not do it, it is not without basis as a general pressure test in the factory production of pressure vessels. It should be noted that the pressure here means a pressure test test.

Hot water boiler vaporization problem the whole solution 1, hot water boiler steam boiler of the phenomenon (1) boiler and pressure suddenly increased safety valve starts to emerge from the water and steam in the expansion tank. (2) the impact of sound water boiler, pipes to vibrate. Impact or the like occurs in the water (3) circulatory system piping. (4) a sharp rise in the temperature of boiler water, over-temperature signal overtemperature alarm occurs. 2, because (1) hot water boiler pot all the water vaporization operator negligence or misuse. Such as forced circulation hot water systems, at startup, the first boiler ignition, after the circulation pump. When shutdown, stop circulation pump, after stopping the boiler operation; or storage of fuel and heat in the boiler does not distribute all do, eager to stop the circulation pump is running and so grossly erroneous operation. (2) the occurrence of circulating hot water boiler outage, improper handling. (3) hot water boiler circulation system or severe leakage, device malfunction or constant pressure, causing a sudden drop in pressure in the boiler. This situation occurs mainly in the high-temperature hot water boilers. (4) cyclic interrupt occurs, although the boiler immediately stop running, but the remaining fuel in the combustion chamber and heat storage water vapor of the pan. This usually heat storage capacity in the furnace, the occurrence of a small pot of water volume of hot water boiler. (5) stop the pump sudden power failure or failure of the circulation pump. (6) the temperature of the hot water boiler, the pressure indicating instrument malfunction, resulting in erroneous judgment. 3, the reason the hot water boiler local vaporized boiler water (1) within the reservoir portion of the tube boiler scale or debris, the local destruction of the boiler water cycle. (2) a boiler structure unreasonable or undesirable combustion conditions, resulting in the line between the parallel deviation is too large heat boiler or boiler water uneven flow distribution, resulting in local overheating vaporized. Local and overall circulation circuit (3) can not form a natural circulation boiler, causing local overheating of vaporized water circulation circuit occurs once the pump stops and the like. 4, treatment of hot water boiler steam boiler (1) stops running hot water boiler. (2) Check the hot water boiler and heating cycle causes vaporization system, and processed. (3) hot water boiler and hot water heating system natural circulation loop, loop back to the natural valve open road. (4) When a sudden power failure, the pump stops running, stopping in the boiler water cycle (forced circulation boiler), the temperature of the boiler water continues to rise due to heat accumulation surface of the combustion chamber of the boiler water to steam, because of a large water capacity If handled properly, usually does not cause accidents pot of water vapor. For hot water boiler tube DC (most of this is domestically produced boilers), because of its small water capacity, when a sudden power failure stop the pump, resulting in more accidents pot of water vapor. Hot water boiler should have suddenly prevent or mitigate the pot of water vapor measures to stop the pump during a power outage. China is now using more is to add water to the boiler and the boiler outlet slow release of steam, the pot of water on the one hand to maintain liquidity, on the other hand reduce the water temperature, up until the elimination of the combustion chamber of the regenerator. Some install the spare circulation pump driven by the internal combustion engine, when a sudden power failure, start the engine, but poor when asked to take into account, because the engine is not instantaneous will be able to start. There is provided a self-standby power supply or generator.

The main types of biomass power plant boiler

Biomass is an important way to large-scale use of biomass energy. Scale biomass combustion power generation technology is the use of biomass as a feedstock to produce steam boilers, steam-driven turbine generator to generate electricity.

To better implement the spirit of the CPC Central Committee nineteen Japanese National Assembly ecological and environmental protection, and resolutely respond Blue Sky Battle action, August 27, Qiqihar, Heilongjiang Province, the city government announced the "small coal-fired boilers Qiqihar City 2018-2020 to promote the phase-out plan" (the "program"), a more concrete of small coal-fired boilers on the basis of governance "Qiqihar City, 2018-2020 tough fight pollution prevention action plan" on.

"Plan" to improve air quality at the core, to take the most effective measures for key areas of work, the various departments collaborate together to complete the task of eliminating small coal-fired boilers.

"Plan" work plan is divided into three phases:

1, before the end of September 2018, in addition to the boiler must be retained, built-up areas in the central city and the rest of the county (city) to complete a full range of 10 steam tons / hour and coal-fired boiler or elimination process.

2, before the end of 2019, each county (city) out of more than 50% of the 10 steam tons / hour and coal-fired boilers.

3, before the end of 2020, in addition to the boiler must be retained, built-up areas outside the central city and the rest of the county (city) the scope eliminate or convert 10 tons of steam / hour and coal-fired boilers.