Gas recovery method for multi-tank positive pressure gas delivery system
A conveying system and gas recovery technology, applied in conveyors, conveying bulk materials, transportation and packaging, etc., can solve the problems of waste of resources and no recycling, and achieve the effect of reducing production costs
Inactive Publication Date: 2012-01-11
WISDRI ENG & RES INC LTD
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Problems solved by technology
In the existing coal injection system, after the "injection" operation of the injection tank is completed, the high-pressure nitrogen inside the injection tank will be directly discharged into the atmosphere after passing through the cloth bag to filter the carried coal powder; because the high-pressure nitrogen in the injection tank directly Dispersed and emptied, not recycled, wasting resources
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Embodiment Construction
[0012] Further describe the present invention below in conjunction with accompanying drawing:
[0013] A gas recovery method for a multi-tank positive pressure gas delivery system. In a multi-tank positive pressure gas delivery system, the spray tanks are connected through a gas recovery device {such as figure 1 As shown, there are 3 spray tanks in the multi-tank positive pressure gas delivery system (the present embodiment is 3, and can also be multiple)}; the nitrogen in the blow tank of the "pressure relief" operation is passed The gas recovery device is discharged into the blowing tank ready for "pressurization" operation, when the pressure difference between the nitrogen in the blowing tank for "pressure relief" operation and the nitrogen gas in the blowing tank for "pressurization" operation reaches the set value Afterwards, stop discharging the nitrogen in the spray tank of the "pressure relief" operation into the spray tank ready for the "pressurization" operation.
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The invention relates to a gas recovery method which is mainly used for a multi-tank positive pressure gas delivery system. The method is characterized in that in the multi-tank positive pressure gas delivery system, injection tanks are mutually connected to each other through a gas recovery device; nitrogen gas in an injection tank performing pressure relief operation is discharged into an injection tank ready for pressure charging operation through the gas recovery device; and when the pressure difference of nitrogen gas between the injection tank performing pressure relief operation and the injection tank ready for pressure charging operation reaches a predetermined value, the discharge of nitrogen gas from the injection tank performing pressure relief operation to the injection tank ready for pressure charging operation is stopped. The method can recover part of discharged gas.
Description
technical field [0001] The invention relates to a gas recovery method, which is mainly applied to a multi-tank (more than 3) positive pressure gas delivery system. Background technique [0002] Blast furnace coal injection is to continuously transport pulverized coal to the blast furnace by using the positive pressure in the injection tank. In this process, two or more injection tanks are usually operated alternately to ensure the continuity of coal injection to the blast furnace. Each blowing tank has 4 basic working states of "charging", "pressurizing", "blowing" and "pressure relief". After the "blowing" operation is completed, the blowing tank is Pressure relief” operation, release and empty the high-pressure nitrogen in the spray tank to facilitate the “filling” operation of the spray tank, and then perform the “pressurization” operation on the spray tank after the “loading” operation is completed. In the existing coal injection system, after the "injection" operation ...
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IPC IPC(8): B65G53/34C21B5/00
Inventor 闫朝付汤楚雄阮建波周少丰
Owner WISDRI ENG & RES INC LTD