Furnace pressure detecting device for glass melting furnace and furnace pressure control system using furnace pressure detecting device

Abstract

The invention provides a furnace pressure detecting device for a glass melting furnace. The furnace pressure detecting device comprises an inner pressure detecting pipeline and an external pressure detecting pipeline of the melting furnace as well as a differential pressure transmitter connected with the two detecting pipelines, wherein the inner pressure detecting pipeline comprises a high-temperature pipe communicated with the inner part of the glass melting furnace, and the high-temperature pipe is horizontally or downwards arranged so that the inlet end of the high-temperature pipe is higher than the outlet end of the high-temperature pipe; the external pressure detecting pipeline comprises a receiving device for receiving an external flow of the melting furnace, the receiving device comprises a receiving pipe provided with a large-opening end and a small-opening end, the large-opening end of the receiving pipe is arranged to be closed, the small-opening end of the receiving pipe is communicated with a buffer pipe, the diameter of the receiving pipe is gradually decreased along the axis of the receiving pipe from the large-opening end to the small-opening end, the side wall of the receiving pipe is provided with a receiving hole for receiving the entry of gas, the large-opening end of the receiving pipe clings to an outer wall of the melting furnace, and a gap is preserved between the large-opening end and the outer wall. According to the furnace pressure detecting device, the inner and external pressure detecting pipelines are arranged, meanwhile, the pressure tapping accuracy of each of the pressure detecting pipelines is ensured, and thus the pressure detecting accuracy is improved.

Description

technical field [0001] The invention relates to a kiln pressure measuring device, in particular to a kiln pressure measuring device for a glass melting furnace and a kiln pressure control system using it as the kiln pressure measuring device. Background technique [0002] In the float glass production process, according to the different combustion methods, the float glass melting furnaces used can be divided into float glass air combustion furnaces and float glass oxy-fuel combustion furnaces. Among them, the float glass air combustion furnace uses air as a combustion-supporting gas, but because nitrogen, which accounts for about 79% of the air, does not have a combustion-supporting effect, a large amount of nitrogen is converted into NO after high-temperature heating X Exhausted into the atmosphere as flue gas, it not only pollutes the environment, but also takes away a lot of heat, resulting in energy waste. Therefore, the oxy-fuel combustion furnace for float glass, whic...

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Problems solved by technology

[0005] In order to solve the problem that the kiln pressure taking device in the prior art is affected by repeated condensation-evaporation of water vapor in the furnace at the inlet of the pressure taking pipeline, which interferes with the internal pressure taking of the melting kiln and the reference system pipeline is easily affected by external disturbing air flow and cannot accurately take pressure Finally, the problem that the pressure measurement value of the pressure transmitter is inaccurate, and then provide a glass melting kiln kiln pressure measurement device, and further provide a kiln pressure control system that uses the above measurement device to regulate the kiln pressure

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