high pressure steam boiler operation
Steam boiler safety valve Di installation and adjustment of safety valves for high pressure steam boiler operations, the importance of self-evident purpose is to protect the safe operation of steam boilers Di, when the medium pressure in the steam boiler or pipe rises, exceeds the specified value automatically open, steam boiler safety shutdown. Safety valve so important, then for Di install it, what should What precautions do, the author based on years of experience, special summarized below. A safety valve safety valve should be installed after Di hydrostatic test boiler installation is complete, should be adjusted safety valve operating pressure during the initial Stoke. Adjusted in accordance with the National Labor Safety Technical Supervision Regulation Administration steam boiler 143 Table 7-2 a predetermined pressure. Second, adjusting the opening of the safety valve remove the pin, removing the top cover, loosen the hexagon nuts and screwing the adjustment screw, to relax or tighten the spring to achieve the required exhaust pressure relief valve. After adjusting tighten the lock nut, and then the remaining parts installed properly. When the valve reaches the predetermined setting pressure should seal, valve unless verify, at any other time does not allow unauthorized disassembly seals. First, when adjusting the safety valve, the water level in the drum should be slightly lower than normal water levels, and water ready at any time after the safety valve can open. Secondly, do not striking any part of the safety valve, the safety valve can only open the lever on the valve. Finally, in the former boiler safety valve is not adjusted absolutely prohibited.
To conscientiously implement the CPC Central Committee and State Council "on the overall strengthening of environmental protection and resolutely fight pollution prevention advice tough fight" and "the State Council on the issuance of three-year winning the Battle of the blue sky plan of action," the spirit, boiler emissions control, prevention and treatment air pollution, the State environmental Protection Department to develop "boiler air pollutant emission standards." In order to further the implementation of air pollution control operations, all regions at the same time meet the national standard, but also have introduced a more stringent local standards.
From the implementation of the Beijing gas nitrogen oxide emission standards for boilers began 30mg, emissions from gas-fired boiler has been of great concern, expand around the "coal to gas" action, so that gas such devices become the most countries to promote clean energy boiler.
The transformation of the current common low nitrogen boiler, there are three main measures: (1) replacement of boilers, (2) replace the burner (3) in the boiler flue gas treatment.
Controlling the nitrogen oxide generated from the source, the most advanced technology on the market today is the use of flue gas recirculation techniques and FGR premix combustion gas boiler technology, both having different focus, low nitrogen emissions boiler.
Replace the boiler burner, renovation and debugging, and the impact on the safety performance of the resulting boiler, burner unit by the responsible manufacturer or his authorized. Beijing Bureau of Quality and Technical Supervision, Beijing Municipal Environmental Protection Bureau issued the "Notice on the transformation of the low - NOx combustion safety risk warning" states: the transformation of low-nitrogen combustion boiler diverse, complex technology, to protect the smooth implementation of the work of reform, effective prevent security risks, prevent accidents, analysis and appraisal by experts, it is not recommended comprehensive safety, environmental factors, the following recommendations:
Nitrogen oxides have been generated by some means and then reduced to nitrogen, the main fuel reburning, selective catalytic reduction, selective non-catalytic reduction. But in the actual monitoring, the nitrogen oxide emissions controllability is poor.
The transformation of low nitrogen gas boiler is a need for long-term adherence and actively manage the work, under the premise to meet the national standards, do specifically address the specific circumstances, not blindly, careless handling, to adopt plans, goals, ideas implementation, to achieve a comprehensive upgrade gas boiler.
(3) When the steam pressure of the high pressure steam boiler operation is stabilized, if the safety valve is pre-adjusted to adjust the opening action pressure, the pressure adjustment can be carried out, but the steam pressure should be strictly controlled; firstly, one with a high opening pressure is adjusted. Then adjust the other one with low opening pressure; if multiple steam boilers should be adjusted separately.
Precautions gas high pressure steam boiler operation gas steam boiler installations are typically used in business have a larger volume, a higher heating characteristics, therefore enterprises should choose the right products according to their needs. After the easy to use gas steam boiler buy back, but also sales units and boiler docking, ask staff to come to arrange installation. Gas-fired steam boiler products installed it properly, and there is a direct relationship between the adequacy of its combustion, so when installing gas steam boiler note the following. First, the need to meet the requirements for the insulation article and the refractory insulation material inside and outside the gas steam boiler, special attention needs to ensure that in place, to prevent use by later installed in place, failure caused by heat boiler, in particular gas steam boiler removal is extremely inconvenient, not only the need for maintenance downtime, manufacturers also need to spend a lot of money and manpower, and these are not careful when you install the resulting waste of resources. Second, note that the vertical spacing of rows and Kun gas steam boiler is usually professional installers, the size of the furnace building will be correct and accurate calibration, but requires special attention vertical cold wall of the duplex pipe in the installation of the exhaust pipe and spacing between, but in fact it will have a direct impact on the stability of the late stage of the gas steam boiler. Third, pay attention to check the matter before the brickwork after installation of gas steam boiler also needs to be pressure test, which is an extremely important step after the installation is complete, while also conduct a detailed inspection of the furnace building, ensure that can meet demand, because the details to avoid problems when installed, caused because the installation is not working is not the case in the late meticulous gas steam boiler. These are some of the issues most useful when installing gas steam boiler should be noted, gas steam boiler manufacturers only in accordance with the actual environment and installation instructions, to carry out strict and meticulous installation, and for some easily lead to late boiler installation details appear unstable special attention, in order to install a stable and reliable gas steam boiler products.