Combined with "263 Action Plan" introduced in Jiangsu Province, improve the ecological environment quality, Changzhou City, Jiangsu Province High-tech Zone Branch Market Authority xixiashu again organize the use of coal-fired boiler units in the area to conduct a comprehensive inspection.
The inspection strengthen the investigation of the case of coal-fired boilers small bathroom, after examination, found that the use of coal-fired boilers within the jurisdiction of the bathroom has been updated for biomass fuel boilers. But when Huaqing Pool bathroom boiler inspection, found that although their water heating boiler has been replaced by biomass fuel boilers, but the phenomenon is still using coal as a raw material existence. Xixiashu Branch inspectors immediately to advise the town of environmental protection departments, and environmental protection departments to strengthen the joint inspection of the bathroom usage boiler safety problems one by one investigation to correct non-compliance.
How natural circulation boiler form a rigid beam and what role? Knowledge and understanding of the boiler, the following forms of learning will be used, is a question and answer of this form, that is, question and answer form to initiate and conduct, so that we can have a good learning outcomes, and questions have a good understanding and correct understanding, so that, when encountered in practical work can be solved in time, and not know what to do, or create new problems, affect the normal use of the boiler, and the results. 1. boiler, natural circulation it is formed? Boiler circulating, is divided into natural circulation and forced circulation of both. In the natural cycle, which is by natural pressure difference between the heating surface and the downcomer, to achieve. Specifically, it is because the density of the mixture in the riser soda, is less than the water in the downcomer the density. Therefore, we can take advantage of this density difference, to make the working fluid flows, without the need for additional external consumption. So, which forms a natural circulation.
Boiler surface quality of the weld quality of the weld surface of the boiler requires requirements: (1) should meet the dimensions of weld design requirements and technical standards, weld and base metal should be a smooth transition, is not less than the height of the weld surface of the base material . (2) the weld heat affected zone and the surface does not allow cracks, pores, craters, and macroscopic defects such as slag. Vertical (3) of the pressure element, and the circumferential weld seam stitching head no undercut, partially undercut the remaining weld depth of not more than 0.5 mm. Sides undercut weld pipe total length of not more than 20% of the circumference of the tube. (4) grinding the weld surface after the elimination of defects or mechanical damage thickness not less than the thickness of the base material. (5) on both sides of the slag and weld spatter must be removed.
21MW YQL gas-fired thermal oil heater for chemical industryThermal oil heater is used to provide heat energy for the reaction and fractionation process of residual oil hydrogenation in chemical industry. Shandong Guangyue Chemical Co., Ltd. is a new comprehensive chemical enterprise, which is engaged in petroleum processing, warehousing logistics and international trade services. The construction of its second project starts in 2018, planning to build 1.6 million tons residual oil hydrogenation each year. ZOZEN has rich experience in chemical industry. ZOZEN’s manufacturing technology of thermal oil heater is unique and inimitable, ensuring the high quality of boilers. After professional explanation by ZOZEN’s engineer, this project leader ordered one set of 21 MW YQL series gas-fired thermal oil heater. This thermal oil heater adopts multi-return coil tube design, which features safer operation, sufficient heating surface and 95% thermal efficiency. It is also equipped with low nitrogen burner for energy saving and environmental protection.
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