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Mixing equipment and method for high-pressure natural gas and low-pressure gas

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

Active Publication Date: 2016-06-29
BAOSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Mixing equipment and method for high-pressure natural gas and low-pressure gas
  • Mixing equipment and method for high-pressure natural gas and low-pressure gas

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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 a mixing device of high-pressure natural gas and low-pressure gas, comprising: a low-pressure gas transmission pipeline, a high-pressure natural gas pipeline and a decompression assembly. The low-pressure gas transmission pipeline is connected to the pressurizer and transmits the low-pressure gas, and the pressurizer pressurizes the low-pressure gas and transmits it to the heating furnace. High-pressure natural gas pipelines transport high-pressure natural gas. One end of the decompression assembly is connected to the high-pressure natural gas pipeline, and the other end is connected to the output end of the compressor. Inlet shut-off valve, multi-stage pressure regulator, safety relief valve, pressure regulating relief valve, flow regulating valve and outlet shut-off valve. The invention also discloses a mixing method of high-pressure natural gas and low-pressure gas. The invention can decompress the high-pressure natural gas and then mix it into the low-pressure coal gas, and solves the problem of pressure fluctuation when the high-pressure natural gas is mixed into the 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 pass through the rough rolling unit and the finishing rolling unit for rolling, 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...

Claims

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Application Information

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Patent Type & Authority Patents(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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