Blast-furnace gas main pipe pressure regulating system for coke oven

Abstract

The invention provides a blast-furnace gas main pipe pressure regulating system for a coke oven. The adjusting system comprises an adjusting device, a diffusing device, a monitoring device and a control device, the adjusting device is arranged on the first pipeline and used for adjusting coal gas conveyed to the coke oven by the blast furnace, the diffusing device is arranged on the second pipeline and used for diffusing the coal gas in the first pipeline, the monitoring device is arranged on the first pipeline and used for monitoring the coal gas pressure of the first pipeline, and the control device is electrically connected with the adjusting device and used for controlling starting and stopping of the adjusting device. According to the invention, DCS system configuration is used; before the pressure fluctuates, the regulating valve is pre-closed to stabilize the pressure; the system is simple to operate, safe and reliable, ensures the stable pressure of coke oven gas, ensures the safety of the coke oven, and performs automatic input and full-automatic control on the coke oven control button through a DCS picture control panel, so that the impact on the regulating valve is reduced by the gas subjected to pressure stabilization, the service life of the regulating valve is prolonged, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of blast furnace gas pressure regulation, and in particular relates to a blast furnace gas main pipe pressure regulation system for coke ovens. Background technique [0002] Using blast furnace gas to heat coke ovens is widely used in large iron and steel companies. Based on site conditions, there are plans to implement comprehensive utilization of blast furnace gas to save energy and reduce environmental pollution. However, in the actual production process, it is often caused by unstable pressure of blast furnace gas main pipe The pressure fluctuation at the end of the coke oven is too large, which poses a safety hazard to production. The current method is to use the high gas main pipe pressure control system to meet the production needs. [0003] The blast furnace gas flow required for coke oven heating is normally: blast furnace—gas cabinet—pressure regulating valve—coke oven. When the gas cabinet is ove...

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Problems solved by technology

[0003] The blast furnace gas flow required for coke oven heating is normally: blast furnace—gas cabinet—pressure regulating valve—coke oven. When the gas cabinet is overhauled, the flow of blast furnace gas is: blast furnace—pressure regulating valve—coke oven. After being stabilized by the gas tank, it is transported to the coke oven. At this time, the stable pressure fluctuation range is less than 1kPa; however, when the gas tank is overhauled, the blast furnace gas does not enter the coke oven for use, and during the blast furnace smelting process, the blast furnace gas occurs in the blast furnace production Fluctuations, resulting in pressure fluctuations in the pipe network in the range of 5kPa, regular reversing during coke oven heating causes pressure fluctuations in blast furnace gas pressure in the range of 3kPa

The peak value of the entire fluctuation will cause the pressure at the end of the coke oven to be greater than 8kPa. Since there is no gas tank to stabilize the gas pressure, only the regulating valve is used to regulate the gas, and the pressure regulation effect is not ideal, which may easily lead to safety accidents

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