Steam boilers and biomassNon - IBR Steam Boiler
Gas heating boiler start making blast furnace commissioning believe what needs to be done in many northern cities, it has been put on the heating heating company focused on project work. So, before performing gas boiler heating furnace Kai, What provisions do? First, before the operation of gas boiler, the total power to open and start the burner, the burner is to be noted Use of the purge valve when the steam boilers and biomassnon - ibr steam boiler is completely out, then turned off. At the same time, when you start gas boiler, but also pay attention to check the observation hole, manholes, hand holes, flanges and valves for loose everywhere, if there are loose reinforcement in a timely manner; if after the reinforcement process still leakage problems, will be carried out to check the shutdown. Secondly, we must pay attention to the air pressure of the gas boiler. When the air pressure in 0.05-0.1MPa, do not forget to issue replenishment, sewerage, water supply system and check the test device to send weapons; when the pressure rises to 0.1-0.15MPa when the need to gauge the trap cleaning ; when the pressure rose to 0.3MPa, to "fire load / small fire" knob to "fire" to strengthen combustion; when 2/3 gas boiler pressure goes up to the rated pressure, you can begin to warm the pipe and aspirated operation, and at the same time pay attention to slowly open the main steam valve to avoid water hammer phenomenon, resulting in adverse effects. When the gas boiler furnace Kai started running, if the drain valve is completely out of steam when it needs to be shut down; when the drain valve is fully closed, to slow the main steam valve to open fully open state, in rotation copyright, finally "burner control" Turn the knob to "automatic" mode.
（10）What are the common faults of boiler safety valve
When the valve leaks under the normal working pressure of the equipment, the leakage of medium in the disc and seat sealing surface of the boiler safety valve occurs in excess of the permitted degree, and the continuous leakage of the medium will also destroy the hard sealing material. Therefore, when the working medium is a steam safety valve, the sealing performance is considered to be qualified if it is invisible to the naked eye at the outlet end and can not be detected under the specified pressure value.
2, the leakage phenomenon at the joint surface between the upper and lower valve bodies of the valve body joint face leakage, the main causes of this leakage are as follows: a, the bolt tightening force of the joint face is insufficient or the tight deviation, resulting in bad sealing surface of the joint surface. B, the sealing surface of the joint face is not good. B, the sealing surface of the joint surface is not good. The tooth-shaped gasket of the valve body joint surface does not conform to the standard. C, the flatness of the valve body joint surface of the boiler safety valve is too poor or the sealing failure is caused by the hard impurity gasket.
3, the phenomenon that the main safety valve does not operate when the impulse safety valve is actuated is usually referred to as the rejection of the main safety valve. The failure of the main safety valve seriously affects the safe operation of the equipment and may cause serious accidents.
4. The main causes of this failure are as follows: on the one hand, the leakage of steam from the piston chamber of the main safety valve becomes larger or smaller, although the impulse safety valve has returned to the seat. However, there is still a high pressure of steam in the pipeline and piston chamber, and the force to push the piston downward is still great, so the return of the main safety valve is slow. The method to eliminate this fault is mainly solved by the opening of the open throttle valve and the increase of the throttle aperture. Both the opening of the throttle valve and the increase of the throttle aperture cause the steam left in the pulse tube to be discharged rapidly. Thus, the pressure in the piston is reduced, and the pressure in the piston is reduced. The thrust acting on the piston decreases rapidly, and the valve core returns to the seat rapidly under the action of the upward thrust of the steam medium in the header and the upward tension of the spring of the main safety valve itself. On the other hand, too much friction between the moving parts of the main safety valve and the fixed parts will also cause the main safety valve to return slowly. The solution to this problem is to control the clearance between the moving parts of the main safety valve and the fixed parts within the standard range.
5. The low return pressure of the safety valve has great harm to the operation of the boiler. Too low return pressure will result in a large number of media overtime discharge, resulting in unnecessary energy loss.
6. The flutter relief valve of the safety valve is called the flutter of the safety valve, which is called the flutter of the safety valve during the discharge process. The occurrence of the flutter phenomenon is very easy to cause the fatigue of the metal, decrease the mechanical properties of the safety valve, and cause serious equipment hidden trouble. The main causes of vibration are as follows: on the one hand, the improper use of valves, the selection of valve discharge capacity is too large (relative to the required discharge), The elimination method should be to make the rated displacement of the selected valve as close as possible to the required discharge of the equipment. On the other hand, because the diameter of the imported pipe is too small, smaller than the inlet diameter of the valve, or the resistance of the imported pipe is too large, the elimination of the side When the valve is installed, the inlet pipe diameter of the valve is not small or the resistance of the inlet pipe is reduced. It is also a factor that causes valve flutter because the resistance of discharge pipe is too large, which can be solved by reducing the resistance of discharge pipe.
Eco-friendly industrial steam boilers and biomassnon - ibr steam boileris all the range now. With worse environment and air pollution, each government focuses on improving human living condition. For example, December 20, 2012: The EPA (Environmental Protection Agency) finalized changes to Clean Air Act standards for area source boilers and for major source boilers. As a result, 99 percent of the approximately 1.5 million boilers in the U.S. are not covered or can meet the new standards by conducting periodic boiler tune-ups. The final rule can be found at Regulatory Actions.
In recent years, Hebei Province People's Government to respond positively to Blue Sky Battle action plan promulgated by the state, and all of 35t / h coal-fired boiler and below in the Hebei province out of the transformation process. First Hospital of Baoding respond positively to the call of the provincial government, eliminate serious pollution of the original coal-fired boiler hospital, citing energy saving steam boilers and biomassnon - ibr steam boiler to natural gas as raw material. After a series of market research, WNS Series Split hospital condensing gas boiler boiler other fast soft spot.