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Process and device for recovering and recycling protective gas of bell-type bright annealing furnace

An annealing furnace and shielding gas technology, which is applied in the field of bell-type bright annealing furnace shielding gas recovery and recycling process and its devices, can solve problems such as insecurity and waste of energy, and achieve energy saving, novel design, economic benefits and social benefits. significant effect

Active Publication Date: 2012-07-25
苏州品源气体设备有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This is not only a waste of energy, but also very unsafe

Method used

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  • Process and device for recovering and recycling protective gas of bell-type bright annealing furnace
  • Process and device for recovering and recycling protective gas of bell-type bright annealing furnace
  • Process and device for recovering and recycling protective gas of bell-type bright annealing furnace

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Embodiment Construction

[0019] Such as figure 1 As shown in the bell-type bright annealing furnace protective gas recovery and recycling device, a cooling condenser E2 is arranged at the backflow protective gas outlet of the bell-type bright annealing furnace group E1, and the bell-type bright annealing furnace group E1 is connected to the cooling and condensing An air inlet valve V1 is installed between the condensers E2, and the air outlet of the cooling condenser E2 is provided with a steam-water separator E3, and the air outlet of the steam-water separator E3 is connected to the pre-stage buffer tank E4, and the air outlet of the pre-stage buffer tank E4 Connected with the inlet of Roots blower E5, Roots blower E5 is connected with frequency converter, the speed of Roots blower E5 is controlled by frequency converter, valve V2 is installed between pre-stage buffer tank E4 and Roots blower E5, Roots blower The outlet of E5 is connected to the oil absorber E6, a valve V3 is installed between the Ro...

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Abstract

The invention relates to a process and a device for recovering and recycling protective gas of a bell-type bright annealing furnace. The process comprises the following steps of: performing cooling and condensation of oil and gas in refluxing protective gas of a bell-type bright annealing furnace group; allowing the cooled and condensed protective gas to enter a water separator to remove most of water and oil; allowing the cooled protective gas from which the oil and the gas are removed to enter a preceding stage buffer tank; after the protective gas is buffered by the preceding stage buffer tank, pressurizing by using a roots blower; allowing the pressurized protective gas to enter an oil absorption device to remove oil and enter a deaerator to remove oxygen; reacting in the deaerator togenerate water and discharge heat; cooling the protective gas by using a cooler and removing water from the protective gas by using a condenser; allowing the cooled and dehydrated protective gas to enter the water separator to separate water; allowing the protective gas to enter an absorption regeneration drying device for removing water and impurities deeply; and performing decompression and voltage stabilization on the purified gas by using a post-stage buffering tank and then supplying the purified gas to the bell-type bright annealing furnace group. Through the process and the device, therefluxing protective gas of the bell-type bright annealing furnace group is recovered and purified and enters the annealing furnace to be recycled as the protective gas again.

Description

technical field [0001] The invention relates to a bell-type bright annealing furnace, in particular to a recovery and recycling process and device for the protective gas of the bell-type bright annealing furnace. Background technique [0002] At present, the protective gas used in the bell-type bright annealing furnace is mainly pure hydrogen or hydrogen-rich gas, and the tail gas is basically burned directly or emptied into the atmosphere, and some manufacturers only use part of the gas as combustion gas to recover heat. . This not only wastes energy, but is also very unsafe. [0003] Bell-type bright annealing furnace, generally the protective gas fed is hydrogen or a mixture of 75% hydrogen and 25% nitrogen (hereinafter referred to as protective gas). It generally takes 24 to 72 hours for the annealed product to enter the bell furnace until the finished product is released. Except for the beginning of furnace loading and the completion of annealing, vacuuming or nitroge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/663F27D7/06
Inventor 俞江杨旭锋
Owner 苏州品源气体设备有限公司
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