Premixed water-cooed combustion corner tube steam boiler

Abstract

The invention discloses a premixed water-cooled combustion corner tube steam boiler. The premixed water-cooled combustion corner tube steam boiler comprises a combustor, a boiler body, a condenser anda chimney. The combustor comprises a premixer, a diverging distributor and a water-cooled combustion head. The boiler body comprises a frame structure composed of a boiler barrel, four-corner descending pipes and collecting boxes, a front wall water-cooled wall in butt joint with the combustor, a convection tube panel, a left membrane type water-cooled wall, a right membrane type water-cooled wall, a heat insulation material and a shell. The condenser is arranged at the tail of the boiler body. Gas and air are mixed through the premixer and fed into the diverging distributor composed of a shell plate and flow guide cones and enter the water-cooled combustion head composed of a pore plate, a light pipe and a light pipe portion of the front wall water-cooled wall to be ignited, water-cooledcombustion reduces the combustion temperature and NOx emission, then high-temperature flue gas scours a convection tube bank to the depth of the condenser to reduce the flue gas temperature, and theheat efficiency of the boiler is improved. The water-cooled combustion head has the effects of preventing backfire and fire disengaging, the combustion safety is guaranteed, the whole boiler is supported by corner tubes, a steel frame is not needed, the structure and manufacturing are simple, and the boiler is of a module structure and is rapid to assemble on site.

Description

technical field [0001] The invention belongs to the technical field of gas boilers, and in particular relates to a premixed water-cooled combustion angle-tube steam boiler. Background technique [0002] The coal-based energy structure supports economic development, leading to serious pollution. In recent years, urbanization and industrialization have continued to advance, and the per capita energy consumption of residents has increased, but the carrying capacity of the environment has weakened. At the same time, people's requirements for ecological construction have also increased. is constantly improving. In order to meet the needs of all parties, natural gas, as a relatively efficient and clean fuel energy at the present stage, will play a vital role in the historical process of energy structure transformation. It is estimated that in the next 15 years, the consumption of natural gas will continue to grow rapidly. [0003] In recent years, surface burner technology has d...

AI Technical Summary

Problems solved by technology

The most common type of fire tube gas boiler is the WNS series gas boiler. Due to the limited pressure that the tube plate structure can withstand, the capacity generally does not exceed 20 tons, and it cannot be large-scaled.

The most common type of water-tube gas-fired boiler is the SZS series gas-fired boiler. Compared with fire-tube boilers, its evaporation can reach a higher level. Welding the cylinder, the welding workload is relatively large, and the welding quality requirements are very high

In addition, both of the above two boilers need to add a steel frame structure outside the boiler body for overall support. On the one hand, additional steel consumption is required, and on the other hand, the connection between the support structure and the body limits the overall stability and seismic performance of the boiler.

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