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Mixing equipment for high pressure natural gas and low pressure coal gas and mixing method

A technology of mixing equipment and natural gas, applied in the direction of gas and gas/vapor mixing, mixing methods, mixers, etc., to achieve the effect of improving energy bottlenecks and solving pressure fluctuation problems

Active Publication Date: 2014-09-17
BAOSHAN IRON & STEEL CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-pressure natural gas pipeline transports high-pressure natural gas

Method used

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  • Mixing equipment for high pressure natural gas and low pressure coal gas and mixing method
  • Mixing equipment for high pressure natural gas and low pressure coal gas and mixing method

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[0030] The most commonly used state is CASE2, that is, the mixed mode of coke oven gas + blast furnace gas + converter gas. When natural gas needs to be put into operation, it is first necessary to switch the mixed mode from CASE2 to CASE1: coke oven gas + blast furnace gas, waiting for a steady state Finally, switch the mixed mode from CASE1 to CASE6 coke oven gas + blast furnace gas + natural gas, so that natural gas is put in. After considering the equipment configuration, it is necessary to design the control scheme, including each interlock, valve opening and closing sequence, opening degree and control mode, etc. First of all, before switching the mixing mode, it must be ensured that the valves on the involved pipelines must be in the "automatic" mode, to ensure that all valves have no alarms, no faults and normal actions, and that all flow and pressure detection equipment are in good working condition. The important condition is to set the lower limit of the total amoun...

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Abstract

The invention discloses mixing equipment for high pressure natural gas and low pressure coal gas. The equipment includes: a low pressure coal gas conveying pipeline, a high pressure natural gas pipeline and a pressure reducing assembly. The low pressure coal gas conveying pipeline is connected to a pressurization machine and conveys low pressure coal gas. The pressurization machine pressurizes the low pressure coal gas and then conveys the coal gas to a heating furnace. The high pressure natural gas pipeline conveys high pressure natural gas. One end of the pressure reducing assembly is connected to the high pressure natural gas pipeline, and the other end is connected to the output end of the pressurization machine. The pressure reducing assembly reduces the pressure of the high pressure natural gas, then the pressurized low pressure coal gas is mixed, and the mixture is conveyed into the heating furnace. The pressure reducing assembly consists of an inlet trip valve, a multi-stage pressure regulator, a safe blow-off valve, a pressure regulating blow-off valve, a flow regulating valve and an outlet trip valve. The invention also discloses a mixing method for the high pressure natural gas and the low pressure coal gas. According to the invention, high pressure natural gas can be decompressed by a decompression way and then mixed into the low pressure coal gas, thus solving the pressure fluctuation problem during mixing of the high pressure natural gas into low pressure coal gas.

Description

technical field [0001] The invention relates to gas mixing technology, in particular to a mixing device and method for high-pressure natural gas and low-pressure gas. Background technique [0002] The hot rolling process in the metallurgical industry is to heat the thicker slab to a certain temperature (generally above 1000°C), then roll it through the rough rolling unit and the finishing rolling unit, and finally become a thinner strip steel, and pass through the coil Take the machine to coil the strip steel. In this process, a special heating furnace is required to heat the slab to the required temperature. Most of the fuel used for heating is auxiliary gas produced by metallurgy, including blast furnace, converter and coke oven gas. Each single gas is mixed according to the required ratio through the gas mixing station and sent to the heating furnace as fuel. Usually, there are two kinds of heating furnace fuels, one is a mixture of two kinds of gas: "coke oven gas + bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F15/02B01F15/04B01F3/02B01F23/10
Inventor 张志强胡民华秦建超
Owner BAOSHAN IRON & STEEL CO LTD
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