Flue gas waste heat boiler It is composed of distribution header, lower header, pipe group and upper header. The boiler feed water is led in and out of the distribution header from the boiler drum. In order to ensure that the temperature of each part of the header does not deviate, the water inlet of the distribution header and the lower header is introduced through a decentralized downcomer. The water enters the lower header and is dispersed into 132 φ forty-two × 4. The pitch circle composed of seamless steel pipe and 6mm thick flat steel is φ The heating surface of 2400mm round flue will produce steam water mixture and enter the upper header, which will be led into the drum through the riser. In order to keep the header away from the flame zone, the lower part of the tube bundle is U-shaped bend, and the included angle between the flue in the furnace mouth section and the horizontal is 55 degrees.

In order to prevent deformation of the flue, a reinforcing ring is arranged at an appropriate position on the flue. The material of header and pipe is 20 (GB3087-1999). The flue pipe group of each section of inclined section I flue, inclined section II flue, last section I flue and last section II flue consists of distribution header, lower header, pipe group and upper header. The boiler feed water is led out from the drum into the distribution header. In order to ensure that the temperature of each part of the header is not biased, the water inlet of the distribution header and the lower header is introduced through a decentralized downcomer. The water enters the lower header and is dispersed into 132 φ forty-two × 4. The pitch circle composed of seamless steel pipe and 6mm thick flat steel is φ 2636mm round flue heating surface, and then produce steam water mixture into the upper header, which is led into the drum by the riser.

Flue gas waste heat boiler High temperature flue gas waste heat: it is a common form, characterized by large output, concentrated production points, strong continuity, and easy recovery and utilization. The heat taken by it accounts for 40~50% of the total heat. The heat recovered by the waste heat boiler can be used for production or domestic heat and power generation. The composition, concentration and particle size of smoke are quite different. As a result, the layout of the heating surface of the waste heat boiler will be affected. Wear prevention, ash blocking and dust removal must be considered. The diversity of smoke components makes some smoke corrosive. For example, SO2 in flue gas, dust or various metal and non-metallic elements in slag may cause low or high temperature corrosion and ash deposition on waste heat boiler equipment. Limited by the inherent conditions of the installation. Some formulate the elevation of inlet and outlet of waste heat boiler; Some specify the exhaust gas temperature of the boiler to meet the requirements of the production process.