Since it was put into operation in 1998, because of the particularity of its internal process, this hot water low pressure diesel fired 3 ton boiler has designed three stages of flow in the interior of the boiler. The water-cooled wall tube has been divided into three parts to form a series flow process by dividing the water-cooled wall tube into three parts through the partition plate and the section in the pot tube. The heat transfer process is lengthened, the heat transfer time is prolonged, and the boiler's temperature raising ability is improved effectively. It is also this reason that it is very difficult to find out the actual situation of each furnace tube in the daily management of the partition barrier. Therefore, in each annual inspection, it is also difficult to find the existing problems, every inspection, maintenance and repair. The furnace tubes of the visual part are in good condition; But the furnace tube of the high temperature part is difficult to check and check. In 12 years of use, no chemical cleaning has been carried out, many years of scale accumulation, after years of operation, eventually happened by blocking the furnace tube accident.
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, low pressure diesel fired 3 ton 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.
China produces more than 700 million tons of crop straw every year, which has become a new source of rural environmental pollution. Hebei Yigao Bioenergy Co., Ltd. and ZOZEN worked together to promote the efficient use of biomass energy such as crop straw. In 2018, Yigao Bioenergy built a number of new production lines, and its products are widely used in papermaking, xylose resin, adhesives, petroleum, pharmaceuticals and other industries. After the project was completed, it is estimated to consume 240,000 tons of biomass straw each year, becoming a demonstration project of comprehensive utilization of biomass straw.
Gas low pressure diesel fired 3 ton boiler hydrostatic test procedures: gas steam boiler with a certain high pressure, high temperature steam output can be higher than 100 deg.] C, and is clear of the pressure vessel defined. After completion of the boiler installation, as required, hydrostatic testing must be done to verify the tightness between the valve body and the boiler.
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