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picture for rehabilitation for water tube boiler

A hot water picture for rehabilitation for water tube boiler economizer: located in the vertical flue at the end of the boiler, using flue gas waste heat to heat the boiler feed water, reduce the exhaust temperature, improve the boiler efficiency, save fuel.

6 tph WNS series condensing gas-fired steam picture for rehabilitation for water tube boiler for battery industryIn the technological process of the battery production, many key links are inseparable from the heat source provided by the boiler. Whether the boiler operation is stable and efficient will directly affect the efficiency of the battery enterprise. Harbin Coslight Battery Co., Ltd. was established in 1997. It mainly produces lead-acid batteries and accessories. It is currently one of the largest manufacturers of valve-regulated sealed lead-acid batteries in China. With the continuous development of foreign markets, Coslight battery has been in short supply, and the production capacity has been further expanded and upgraded.In 2014, Cosligtht Battery and ZOZEN achieved the first cooperation and Cosligtht Battery was very satisfied with the performance of all aspects of the boiler system. After then, Cosligtht Battery purchased several sets of WNS series boilers fueled by clean energy natural gas to meet the expanding production capacity and the strict environmental protection regulations in 2016 and 2017. This series of gas-fired steam boilers has a large-diameter furnace space and is equipped with an advanced low NOx burner to easily achieve low emissions of NOx ≤ 30mg/m³  with excellent environmental performance. Not only that, the full-corrugated furnace of WNS series gas-fired boiler has good thermal expansion, which ensures the safety of the boiler as well as expanding the heating surface. With the energy-saving devices added at the tail of the flue, the exhaust gas temperature can be reduced to 60 degrees and the thermal efficiency is as high as 98%.

In early November, Luyi County, Henan Province Quality Supervision Bureau organized a safety inspection activities on the picture for rehabilitation for water tube boiler in the area, ensure the safe use within the jurisdiction of the boiler in winter.

The main focus of inspection units use boilers to see through the following points:

First, the use of registration, maintenance, periodic testing situation.

Second, the establishment and implementation of the system and the rescue plan.

Third, if the boiler worker certificates.

Fourth, the operation of the boiler water treatment facilities.

To date, Luyi County Quality Supervision Bureau has complete supervision and inspection work on 11 units in the boiler, the inspection found problems and risks, monitor the instruction issued according to the law, clearly boiler rectification matter and time.

The inspection requirements for picture for rehabilitation for water tube boiler welded joints are made on the basis of listening to the opinions of the relevant units and referring to the regulations of the relevant codes. This code does not require gas-phase furnace and liquid-phase furnace respectively, but different requirements according to different pressure components. 1. The longitudinal ring weld seam of the boiler drum and the joint of the head of the boiler shall be ray or ultrasound plus at least 25% ray detection, which is basically consistent with the requirements of the current steam boiler and hot water boiler code, Only the requirement for ultrasonic plus at least 25% x-ray flaw detection has been added, the same as the 80 version steam boiler code requirements. This provision mainly considers ultrasound plus 25% X-ray detection, complete The defects in the weld can be detected to meet the safety requirements, and the production cost can be reduced. 25% X-ray inspection must include the longitudinal seam and the circumferential cross joint. 2. The inspection of the butt joint of the heating surface pipe is required according to the different heat condition. Heat is different from radiative heat and convective heat. In the draft for advice, 25% and 10% spot tests are prescribed respectively. Among the feedback, some thought the requirement was lower, and suggested that it should be changed to 50%; some thought the requirement could be lower. Through analysis and research, we have adopted the latter opinion that the radiation range is no less than 10%. X-ray inspection; convective section not less than 5% X-ray detection. Gas shielded welding should be adopted in butt weld of heated surface pipe, and the quality can be guaranteed. In addition, the method of flaw detection and the calculation of sampling rate are stipulated in this regulation, which makes this procedure more operational. 3. Except for the drum of the gas furnace, the boiler drum of the liquid phase furnace, the heating surface pipe of all organic heat carrier furnaces and the butt joint of the pipe shall not be required to carry out the mechanical performance test. Therefore, this regulation only for gas boiler drum batch production of each 10 to do a test plate. There is no requirement for a test board in any other case. . The use pressure of liquid phase furnace is relatively low. At the same time, not only the welding method is specified clearly in this code, but also the requirements for welding procedure evaluation are put forward, which can guarantee the quality and performance of welding seam.

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