Superheater tubes 1 and the explosion accidents, bursting phenomenon superheater tubes (1) discharge steam explosions near or sound superheater. (2) steam flow abnormally decreased, and the flow is not less than the water flow normally. (3) the chamber pressure is reduced or made negative, when the door severe, see the fire and smoke outwardly steam discharge hole. (4) the flue gas temperature after superheaters abnormally decreased or increased temperature difference before and after the flue gas superheater. Severe (5) damage, boiler steam pressure drop. (6) the exhaust gas temperature decreased significantly, the chimney flue gas into a gray or white color. (7) draft fan load increased, the current increased.
The open recovery system recovers the condensed water into the feed water tank of the boiler. During the recovery and utilization of the condensed water, one end of the recovery line is open to the atmosphere, that is, the collection tank of the condensed water is open to the atmosphere. When the pressure of the condensed water is low and the self-pressure cannot reach the reuse site, the condensed water is pumped by the high-temperature water pump. The advantage of this kind of system is that the equipment is simple, the operation is convenient, and the initial investment is small; but the system covers a large area, the obtained economic benefit is poor, the environmental pollution is large, and the dissolved oxygen concentration in the condensed water is directly contacted by the condensed water. Increased, easy to cause equipment corrosion. This system is suitable for small steam supply systems, systems with a small amount of condensed water and a small amount of secondary steam. When using this system, the amount of secondary steam emissions should be minimized.
The normal shutdown operation of the hot water boiler is to stop the supply of fuel, stop the supply of air, and then stop the induced air, but it is not allowed to stop the circulating water pump when the boiler outlet temperature is lower than 50 °C.
According to Anhui Province to work in the 2018 year-end summary of the province, in 2018, Anhui Province, built-up area exceeding 35 cities steam tons / hour or less industrial coal-fired boilers as well as glass, ceramic industry, industrial kilns clean energy alternative to work. Complete 97 sets of clean energy alternatives, completion rate of 76.4%, exceeding the annual target of 50% substitution tasks.
It is reported that Anhui start from the following aspects to strengthen the control and management of coal-fired boilers, is over-done.
First, strengthen research, Mozhun the truth.
1, carry out key research, went to Hefei, Bengbu, Chuzhou development of industrial coal-fired boilers, kilns clean energy alternative research work, the front line, replace understand the business progress, issues and rationalization proposals exist.
2, a diagnostic investigation, issued "regarding the development of cities and built-up areas 35 steam tons / hour boiler and industrial enterprises and the glass and ceramics industry, industrial kilns investigation work" and collect aggregate and cross-checking data to improve municipalities investigation; Third, learn practice field, go to Tianjin, Hebei research study "coal clear" action and glass industry furnace clean energy alternative to work, learn from the successful experience of leading regions. Grasp the province's boiler, furnace conditions first-hand data, be aware of the difficulties of enterprises, clear focus and difficult work.
Second, a clear mandate to strengthen the scheduling.
Issued a "built-up area of Anhui Province cities 35 tons of steam per hour of coal-fired industrial boilers as well as glass, ceramics industry, clean energy alternative to coal-fired furnaces work plan", based on clear objectives, tasks, scope and duration of the transformation node, proposed work requirements. And issued a "35 tons of steam and industrial coal-fired boilers and the notification submitted on a regular basis municipalities built-up area per hour, glass, ceramics industry, coal-fired kilns clean energy alternative to progress information", and held a forum, a monthly tracking scheduling progress, and urge municipalities in accordance with the program of work, and steadily promote the implementation of alternative work schedule.
Third, innovative initiatives to promote accurate.
For enterprises in the implementation of coal-fired boilers, furnaces clean energy alternative technology transformation encountered financial problems, the implementation of precise advance.
1, the organization held a provincial industrial boilers clean energy alternative technical equipment special promotion, targeted Recommend energy-efficient air units, heat pumps integrated device source, environmentally friendly low-emission of nitrogen gas boiler and a number of boiler clean energy alternative to new technology and equipment, docking platform to build both supply and demand.
2, a clean energy alternative to key projects in 2019 included green manufacturing project-oriented investment program to enhance the enthusiasm of enterprise transformation.
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