High-temperature slap discharging valves

Abstract

A high temperature slag discharge valve consists of a body, a cap, a core, heat-expelling levers, and a transmission. The core has an ellipsoidal conic top and connected with the transmission througha universal joint and two heat-expelling levers. The transmission can be screwed up and down. The main parts said above are all made from nonmetal materials, by powder metallurgy and composite materials molded or cast, curing, drying, and sintering, so that all the parts, especially the core, are of high temperature resistance and wear resistance, and reliable to control slag discharge.

Description

Technical field: [0001] The invention relates to a high-temperature slag discharge valve, in particular to a slag discharge control device for a circulating fluidized bed boiler. Background technique: [0002] At present, the fluidized bed boilers produced and used at home and abroad generally use 2 to 4 slag discharge valves to control the flow of slag discharge. A gate valve with a gate or a butterfly valve with a rotatable disc element to adjust the flow rate. The use temperature of this type of structure and the high-temperature slag discharge valve made of this metal is required to be lower than 800 ° C, and the high temperature resistance is poor. When When the temperature is higher than 600°C, the properties of the metal begin to fail, and its mechanical and chemical properties become poor, so that the slag material sticks and jams and loses control. Therefore, the life of the metal slag discharge valve is short. In addition, the way to control the slag discharge val...

AI Technical Summary

Problems solved by technology

[0002] At present, the fluidized bed boilers produced and used at home and abroad generally use 2 to 4 slag discharge valves to control the flow of slag discharge. A gate valve with a gate or a butterfly valve with a rotatable disc element to adjust the flow rate. The use temperature of this type of structure and the high-temperature slag discharge valve made of this metal is required to be lower than 800 ° C, and the high temperature resistance is poor. When When the temperature is higher than 600°C, the performance of the metal begins to fail, and its mechanical and chemical properties become poor, so that the slag material will stick and jam and lose control. Therefore, the life of the metal slag discharge valve is short

In addition, the way to control the slag discharge valve is to use high-pressure air to blow outward, and adjust the pressure and flow of high-pressure air to adjust the slag discharge volume. Therefore, the ability to discharge solid slag is very weak, and the reliability is also very poor.

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