Acid solution preparation device, acid solution supply apparatus, and pickling facility

Patent metadata

Field	Value
Publication number	US-12139797-B2
Application number	US-201917439720-A
Country	US
Kind code	B2
Filing date	Mar 22, 2019
Priority date	Mar 22, 2019
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

An acid solution preparation device is an acid solution preparation device for preparing an acid solution used for pickling of a steel plate, the device including a sealed tank for storing the acid solution, a gas supply part for supplying an oxygen-containing gas from outside of the sealed tank to the sealed tank, and a purge part for discharging a gas in the sealed tank to the outside.

First claim

The invention claimed is:

1. An acid solution preparation device for preparing an acid solution used for pickling of a steel plate, the device comprising:
a sealed tank for storing the acid solution;
a gas supply part for supplying an oxygen-containing gas from outside of the sealed tank to the sealed tank; and
a purge part for discharging a gas in the sealed tank to the outside,
wherein the gas supply part includes:
a gas supply pipe through which the oxygen-containing gas supplied to the sealed tank flows; and
a first valve disposed on the gas supply pipe, for regulating a pressure of the gas supply pipe.

2. The acid solution preparation device according to claim 1 ,
wherein the gas supply part is configured to supply the oxygen-containing gas having an oxygen partial pressure higher than 0.022 MPa to the sealed tank.

3. The acid solution preparation device according to claim 1 , further comprising:
a pressure sensor for measuring a pressure in the sealed tank,
wherein the first valve is configured such that an opening degree thereof is adjusted based on a measurement result by the pressure sensor.

4. The acid solution preparation device according to claim 1 , further comprising:
an oxygen gas generating device for generating a gas having a higher oxygen concentration than air,
wherein the gas supply part is configured to supply the gas generated by the oxygen gas generating device to the sealed tank as the oxygen-containing gas.

5. The acid solution preparation device according to claim 1 , further comprising:
a pressurizing part for pressurizing the oxygen-containing gas supplied to the sealed tank.

6. The acid solution preparation device according to claim 1 , further comprising:
a temperature regulating part for regulating a temperature of the acid solution stored in the sealed tank.

7. The acid solution preparation device according to claim 1 , further comprising:
an acid solution circulation passage for extracting the acid solution stored in the sealed tank and circulating the acid solution to be returned to the sealed tank; and
a circulation pump disposed on the acid solution circulation passage.

8. The acid solution preparation device according to claim 7 ,
wherein the acid solution circulation passage is configured to circulate the acid solution to be returned to a gas phase portion of the sealed tank, and
wherein the acid solution preparation device further comprises an injection part configured to inject, in the gas phase portion, the acid solution returned to the gas phase portion via the acid solution circulation passage.

9. The acid solution preparation device according to claim 7 , further comprising:
a gas mixing part supplied with the acid solution extracted from the sealed tank via the acid solution circulation passage, for mixing the oxygen-containing gas in the supplied acid solution,
wherein the acid solution preparation device is configured such that the acid solution from the gas mixing part is stored in the sealed tank.

10. The acid solution preparation device according to claim 9 ,
wherein the gas mixing part is disposed outside the sealed tank.

11. The acid solution preparation device according to claim 1 , further comprising:
a gas blowing part for blowing the oxygen-containing gas into the acid solution stored in the sealed tank.

12. The acid solution preparation device according to claim 1 , further comprising:
at least one of a gas mixing part for mixing the oxygen-containing gas in the acid solution in an acid solution circulation passage for extracting the acid solution in the sealed tank to the outside of the sealed tank and circulating the acid solution to be returned to the sealed tank, or a gas blowing part for blowing the oxygen-containing gas into the acid solution stored in the sealed tank; and
a gas circulation passage for extracting a gas of a gas phase portion in the sealed tank and circulating the gas to be returned to the sealed tank,
wherein the acid solution preparation device is configured such that at least one of the gas mixing part or the gas blowing part is supplied with the gas from the gas circulation passage.

13. The acid solution preparation device according to claim 12 ,
wherein the purge part includes a purge pipe connected to the gas circulation passage, and is configured to discharge the gas in the sealed tank to the outside via the gas circulation passage.

14. An acid solution supply apparatus, comprising:
the acid solution preparation device according to claim 1 ;
an acid solution supply line for supplying the acid solution stored in the sealed tank to a pickling device;
a gas recovery container disposed on the acid solution supply line; and
a pressure reducing valve disposed upstream of the gas recovery container on the acid solution supply line.

15. A pickling facility, comprising:
a pickling device for pickling a steel plate with an acid solution; and
the acid solution supply apparatus according to claim 14 configured to supply the acid solution to the pickling device.

16. An acid solution preparation device for preparing an acid solution used for pickling of a steel plate, the device comprising:
a sealed tank for storing the acid solution;
a gas supply part for supplying an oxygen-containing gas from outside of the sealed tank to the sealed tank; and
a purge part for discharging a gas in the sealed tank to the outside,
wherein the purge part includes:
a purge pipe through which the gas discharged from the sealed tank flows; and
a valve disposed on the purge pipe, for regulating a flow rate of the gas discharged from the sealed tank via the purge pipe.

17. The acid solution preparation device according to claim 16 , further comprising:
a concentration sensor for measuring an oxygen concentration in gas phase in the sealed tank,
wherein the valve is configured such that an opening degree thereof is adjusted based on a measurement result by the concentration sensor.

18. An acid solution supply apparatus, comprising:
the acid solution preparation device according to claim 5 ;
an acid solution supply line for supplying the acid solution stored in the sealed tank to a pickling device;
a gas recovery container disposed on the acid solution supply line; and
a pressure reducing valve disposed upstream of the gas recovery container on the acid solution supply line.

19. A pickling facility, comprising:
a pickling device for pickling a steel plate with an acid solution; and
the acid solution supply apparatus according to claim 18 configured to supply the acid solution to the pickling device.

Assignees

• Primetals Tech Japan Ltd

Inventors

• Tsuji Kosei
• Nakatsuka Ryusuke
• Yagi Takahiro
• Yoshikawa Masashi
• Takatani Hideaki
• Yasui Toyoaki
• Hirata Takuya

Classifications

• C23G1/36

  Regeneration of waste pickling liquors · CPC title

• C23G1/081

  solutions containing H2SO4 · CPC title

• C23G3/021 Primary

  by dipping · CPC title

• C23G1/086

  solutions containing HF · CPC title

• C23G1/085

  solutions containing HNO3 · CPC title