CN214612673U - Waste argon recycling device of cold rolling annealing furnace protective gas supply system - Google Patents
Waste argon recycling device of cold rolling annealing furnace protective gas supply system Download PDFInfo
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- CN214612673U CN214612673U CN202120144000.4U CN202120144000U CN214612673U CN 214612673 U CN214612673 U CN 214612673U CN 202120144000 U CN202120144000 U CN 202120144000U CN 214612673 U CN214612673 U CN 214612673U
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Abstract
The utility model relates to a cold rolling annealing stove protective gas supply system's useless argon recovery cyclic utilization device, it can include pretreatment tower, forced draught fan, oxygen-eliminating device and the drying tower that connects gradually through corresponding pipeline, pretreatment tower's air inlet and cold rolling annealing stove's useless argon delivery union coupling for carry out physical adsorption, emulsion, moisture and granule in order to get rid of useless argon, forced draught fan is used for carrying out the pressure boost to the argon gas after the preliminary treatment, the oxygen-eliminating device is used for carrying out deoxidation treatment to argon gas, makes the oxygen content in the argon gas be less than 5ppm, the drying tower is arranged in further desorption to the moisture in the argon gas, makes the dew point of argon gas be less than-60 ℃. Through the waste argon recycling device, the argon consumption is obviously reduced, the production cost of the strip steel is reduced, the enterprise competitiveness is improved, and the device has important significance for energy conservation and consumption reduction of cold rolling procedures of ferrous metallurgy enterprises.
Description
Technical Field
The utility model relates to a cold rolling annealing stove of steel, concretely relates to cold rolling annealing stove protective gas supply system's useless argon recovery cyclic utilization device.
Background
The cold rolling annealing furnace of the ferrous metallurgy enterprise usually adopts high-purity hydrogen as protective gas, and the used protective gas is discharged as waste gas. The preparation cost of the hydrogen is high, and the requirement on the safety level of the production environment is high; the hydrogen content in the used waste gas is up to more than 80 percent, the direct discharge is not only a great waste to energy, but also a certain pollution to the environment and potential safety hazard are possibly brought.
Disclosure of Invention
The utility model aims at providing a cold rolling annealing stove protective gas supply system's useless argon recovery cyclic utilization device to solve above-mentioned problem. Therefore, the utility model discloses a specific technical scheme as follows:
the utility model provides a cold rolling annealing furnace's protective gas supply system's useless argon recovery cyclic utilization device, it can include pretreatment tower, forced draught fan, oxygen-eliminating device and the drying tower that connects gradually through corresponding pipeline, pretreatment tower's air inlet and cold rolling annealing furnace's useless argon delivery union coupling for carry out physical adsorption, emulsion, moisture and granule in order to get rid of useless argon, forced draught fan is used for carrying out the pressure boost to the argon gas after the preliminary treatment, the oxygen-eliminating device is used for carrying out deoxidation treatment to argon gas, makes the oxygen content in the argon gas be less than 5ppm, the drying tower is arranged in further desorption to the moisture in the argon gas, makes the dew point of argon gas be less than-60 ℃.
Furthermore, pretreatment tower, forced draught fan, oxygen-eliminating device and drying tower are 2 sets of parallelly connected settings.
Furthermore, a plurality of layers of molecular sieves and/or activated carbon are arranged in the pretreatment tower.
Further, the gas inlet of the pretreatment column is located at the bottom, the gas outlet is located at the top, and the molecular sieve is disposed below the activated carbon.
Furthermore, the pressurizing fan is provided with a backflow adjusting facility to ensure the furnace pressure of the annealing furnace to be stable.
Furthermore, a catalyst and a deoxidizing agent are filled in the deaerator.
Furthermore, the drying tower is filled with a plurality of layers of molecular sieves to adsorb residual water and carbon dioxide.
The utility model adopts the above technical scheme, the beneficial effect who has is: the method has the advantages of obviously reducing argon consumption, reducing the production cost of strip steel, improving the competitiveness of enterprises and having important significance for energy conservation and consumption reduction of cold rolling procedures of ferrous metallurgy enterprises by recycling waste argon.
Drawings
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
FIG. 1 is a process flow diagram of a protective gas supply system for a cold rolling annealing furnace according to the present invention.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, a cold rolling annealing furnace shielding gas supply system may include a liquid argon gasification apparatus 1 and a waste argon recovery and recycling apparatus 2. Argon gas generated by the liquid argon gasification device 1 is supplied to the cold-rolling annealing furnace through a first pipeline A, and argon gas generated by the waste argon recycling device 2 is supplied to the cold-rolling annealing furnace through a second pipeline B. Namely, the purified recovered argon and the argon gasified by the liquid argon tank are connected in parallel and sent into an annealing furnace, and the two argon paths can be switched for use.
The liquid argon gasification device 1 can comprise a liquid argon storage tank 11, an air-temperature type gasifier 12 and a pressure regulating valve group 13 which are sequentially connected through pipelines. Specifically, the liquid outlet pipe of the liquid argon storage tank 11 is connected to the inlet of the air-temperature type gasifier 12, the outlet of the air-temperature type gasifier 12 is connected with the first pipeline a, and the pressure regulating valve group 13 is installed on the first pipeline a. Liquid argon in the liquid argon storage tank 11 is gasified into argon gas through an air temperature type gasifier, and the argon gas is directly sent to a cold rolling annealing furnace after passing through a pressure regulating valve group 13 to be used as protective gas for strip steel production. Wherein, liquid argon storage tank 11, air temperature formula vaporizer 12 and pressure regulating valves 13 are 2 sets of parallelly connected settings, and each other is reserve, also can use simultaneously, has guaranteed the continuous stable supply of argon gas.
The liquid argon storage tank 11 is provided with the liquid level meter 111, and the liquid argon amount in the liquid argon storage tank 11 can be known through the liquid level meter 111, so that timely supplement is facilitated, and continuous and stable supply of argon gas is ensured. In one embodiment, the liquid argon storage tank 11 has a volume of 20 cubic meters and 2 seats, and can meet the supply of protective argon gas of 200Nm3/h for 6 days. Preferably, the outer wall of the liquid argon storage tank 11 is coated with an insulating layer.
With the continuous annealing process, the composition, oxygen content, dew point and impurity particle size of the argon in the furnace are changed, and the argon contains a small amount of impurities such as oxygen, nitrogen, water vapor, emulsion and the like, so that the argon cannot be continuously used as a protective gas. Therefore, it is necessary to purify the waste argon by the waste argon recovery and recycling device 2.
The waste argon recycling device 2 comprises a pretreatment tower 21, a pressurizing fan 22, a deaerator 23 and a drying tower 24 which are sequentially connected through corresponding pipelines. Wherein, the air inlet of the pretreatment tower 21 is connected with a waste argon discharge pipe of the cold rolling annealing furnace. The waste argon from the cold rolling annealing furnace is physically adsorbed in the advanced pretreatment tower 21. The pretreatment tower 21 is internally provided with a plurality of layers of adsorbents such as molecular sieves and/or active carbon and the like to remove impurities such as emulsion, moisture, particles and the like in the waste argon. Specifically, the inlet of the pretreatment tower 21 is located at the bottom, the outlet is located at the top, and the molecular sieve layer is disposed below the activated carbon layer. The pretreatment tower 21 is provided with 2 seats for switching use during regeneration.
The booster fan 22 is used for boosting the pretreated argon gas so as to compensate resistance loss required by the argon gas after the subsequent process. The pressurizing fans 22 are provided with 2 fans which are mutually standby, and a large backflow adjusting facility 221 is designed to prevent the pressure fluctuation in the furnace caused by excessive argon extraction from influencing the strip steel production. The power level of the booster fan 22 can be adjusted as desired.
The deaerator 23 is used for deoxidizing the argon gas so that the oxygen content in the argon gas is less than 5 ppm. Specifically, the deaerator 23 is filled with a catalyst and a deoxidizer. The pressurized argon passes through a deaerator, and oxygen in the argon reacts with the deoxidizer under the catalytic action of the catalyst, so that the effect of removing the oxygen is achieved. In a specific embodiment, the deaerator is a vertical storage tank structure, is about 2 meters high, has a diameter of about 0.5 meter, is internally provided with a heater to meet the reaction temperature, is laid with a plurality of layers of nickel-chromium wire nets to place a deoxidizer so that the deoxidation reaction can be fully carried out, and is provided with a feeding hole and a discharging hole which are convenient to assemble and disassemble.
A drying column 24 is used for further removal of moisture from the argon. The air outlet of the drying tower 24 is connected with the second pipeline B. And the high-purity argon with the purity of more than 99.999 percent, the dew point temperature of less than-60 ℃ and the oxygen content of less than 5ppm is obtained after passing through the drying tower 24 and is supplied to the cold-rolling annealing furnace through a second pipeline B. The drying tower 24 is provided with 2 seats for switching use during regeneration. In one embodiment, the drying tower 24 is a vertical storage tank structure having a height of about 1 meter and a diameter of about 0.5 meter, and has a plurality of layers of nichrome wire mesh placed therein for placing the molecular sieve packing.
When the cold rolling annealing furnace is initially put into operation, argon is supplied to the cold rolling annealing furnace by the liquid argon gasification device 1, and after the protective gas of the cold rolling annealing furnace is filled with the flowing argon for the first time, the waste argon is purified by the waste argon recycling device 2 to obtain high-purity argon meeting the use requirements. Meanwhile, the liquid argon gasification device 1 is used as a standby gas path to ensure the continuous supply of the protective gas of the annealing furnace when the waste argon recycling device 2 has a fault.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a cold rolling annealing stove protective gas supply system's useless argon recovery cyclic utilization device, a serial communication port, useless argon recovery cyclic utilization device includes pretreatment tower, forced draught fan, oxygen-eliminating device and the drying tower that connects gradually through corresponding pipeline, pretreatment tower's air inlet and cold rolling annealing stove's useless argon discharge union coupling for carry out physical adsorption, emulsion, moisture and granule in the useless argon are got rid of, the forced draught fan is used for carrying out the pressure boost to the argon after the preliminary treatment, the oxygen-eliminating device is used for carrying out deoxidation treatment to argon, makes the oxygen content in the argon be less than 5ppm, the drying tower is arranged in further desorption to the moisture in the argon, makes the dew point of argon be less than-60 ℃.
2. The waste argon recycling device of claim 1, wherein the pretreatment tower, the pressurizing fan and the drying tower are all 2 sets of parallel arrangement.
3. The waste argon recycling device according to claim 1, wherein a plurality of layers of molecular sieves and/or activated carbon are arranged in the pretreatment tower.
4. The waste argon recovery and recycling device of claim 3, wherein the gas inlet of the pretreatment column is located at the bottom, the gas outlet is located at the top, and the molecular sieve is arranged below the activated carbon.
5. The waste argon recycling device of claim 1, wherein the pressurizing fan is provided with a backflow adjusting facility to ensure the furnace pressure of the annealing furnace to be stable.
6. The waste argon recycling device of claim 1, wherein the oxygen remover is filled with a catalyst and a deoxidizing agent.
7. The waste argon recycling device of claim 1, wherein the drying tower is filled with a plurality of layers of molecular sieves.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022156282A1 (en) * | 2021-01-20 | 2022-07-28 | 中冶南方工程技术有限公司 | Protective gas supply system of annealing furnace for cold rolling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022156282A1 (en) * | 2021-01-20 | 2022-07-28 | 中冶南方工程技术有限公司 | Protective gas supply system of annealing furnace for cold rolling |
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