Shell type high temperature superheated steam structure

Abstract

The invention relates to a shell type high-temperature superheated steam structure. The shell type high-temperature superheated steam structure comprises a shell, an internal furnace located in the shell and a plurality of fire tubes, wherein one end of the shell is provided with a membrane type water wall, a flue gas inlet of the membrane wall is communicated with an outlet of the internal furnace, a flue gas outlet of the membrane wall is communicated with inlets of the fire tubes to form a closed structure, a superheater is arranged in the membrane wall area in front of the fire tubes, the portion, on the left side of the outlet of the internal furnace, of the membrane wall absorbs heat of high-temperature flue gas so that the high-temperature flue gas can be cooled, and then the cooled high-temperature flue gas enters the portion, on the right side, of the membrane wall, and transversely washes the superheater. The shell type high-temperature superheated steam structure has the advantages that the heating area is increased through the membrane wall, and the heat absorption capacity is improved through the membrane wall, the temperature of the flue gas entering the fire tubes can be effectively lowered, the wall temperature of the ends of the fire tubes and the wall temperature of tube plates are lowered, water circulation at the ends of the fire tubes and the tube plates is improved, and safety of the fire tubes and the tube plates is ensured.

Description

technical field [0001] The invention relates to a boiler, in particular to a shell-type high-temperature superheated steam structure. Background technique [0002] With the continuous rapid development of my country's economy, some new industries and new enterprises are constantly emerging, which have higher and higher requirements for the quality of steam, requiring steam to have a higher superheating temperature, requiring the temperature to be above 250 °C, and some even require It can reach 350°C; but the amount of steam it uses is not large, generally 10t / h, and some even only need 4t / h. [0003] At present, domestic shell boilers can only provide saturated steam, or superheated steam with a lower temperature. Those that require superheated steam generally use a water tube boiler structure, but there are the following problems: 1. The boiler structure is complex and bulky. 2. The cost of the equipment is high, the floor area is large, and the user investment is large. ...

AI Technical Summary

Problems solved by technology

The water tube boiler structure is generally used for superheated steam, but it has the following problems: 1. The boiler structure is complex and bulky

2. The cost of the equipment is high, the floor area is large, and the user investment is large

4. The water tube boiler has a large water capacity and a long start-up time, which is not fast enough to meet the user's frequent start-stop requirements

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