High-temperature flap valve

Abstract

The invention provides a high-temperature flap valve, which comprises a valve body, a seal flap, a transmission case, a flap swing arm, a pneumatic driving device and a balance weight, wherein the seal flap is connected with the transmission case through the flap swing arm; the transmission case is arranged on the valve body; the inlet of the valve body is provided with a seal ring; the seal flap is provided with at least one layer of concentric ring seal cutter; the cross section of the at least one layer of ring seal cutter is in the shape of a trapezoid; moreover, the upper edge of the trapezoid is extremely narrow and forms a sharp seal face; under the condition that substances, such as tar and dust, are bonded to the surface of the seal ring, the ring seal cutter can be shoveled into the substances, and is tightly fitted with the seal ring at the inlet of the valve body under the drive of the pneumatic driving device; a shaft transmission system I and a shaft transmission system II in the transmission case are connected with the flap swing arm through keys. The high-temperature flap valve provided by the invention has the beneficial effects that the high-temperature flap valve is arranged at the joint of a gas up take and a crossover main, can be reliably opened and closed under high-temperature and severe working conditions, and meets the requirement on the airtightness of gas pipelines.

Description

technical field [0001] The invention relates to the field of high-temperature raw gas pipeline valves, in particular to a high-temperature flap valve. Background technique [0002] At present, a large amount of high-temperature raw gas with a temperature of 750-950°C is produced during the high-temperature carbonization process of coal in the coke oven. The ammonia water absorbs heat and evaporates to lower the temperature of the raw coal gas, which enters the subsequent recovery and processing section of coal chemical products. In this process, a large amount of heat energy brought by the raw coal gas has not been utilized. If this part of high-temperature raw gas is directly exported and passed into the waste heat boiler for heat exchange, the medium-pressure or high-pressure steam generated can be used for power generation, which can bring more energy. much economic value. [0003] In the waste heat utilization process of raw gas, it is necessary to intermittently contr...

AI Technical Summary

Problems solved by technology

In traditional gas pipelines, butterfly valves are often used to control the on-off of raw gas, and they are installed on the bridge pipe behind the rising pipe of raw gas. However, raw gas is doped with a large amount of coal tar and dust, and it is easy to stick to it when the temperature changes. On the valve, causing the valve opening and closing action to fail

Images