Desulfurization absorption tower

• US 10,561,984 B2
• Filed: 08/08/2019
• Issued: 02/18/2020
• Est. Priority Date: 07/03/2017
• Status: Active Grant

• Current Assignee: Jiangnan Environmental Protection Group Inc.
• Original Assignee: Jiangnan Environmental Protection Group Inc.
• Inventors: Luo, Jing, Zhang, Congzhi, Luo, Yongying
• Primary Examiner(s): Holecek, Cabrena
• Application Number:
  US16/535,355
• Publication Number:
  US 20190358587A1
• Time in Patent Office: Days
• CPC Class Codes: B01D 2252/10 Inorganic absorbents chemical reactants B01D2251/00
• CPC Class Codes: B01D 2252/102 Ammonia
• CPC Class Codes: B01D 2257/302 Sulfur oxides
• CPC Class Codes: B01D 53/504 characterised by a specific device
• CPC Class Codes: B01D 53/76 Gas phase processes, e.g. by using aerosols
• CPC Class Codes: B01D 53/8637 Simultaneously removing sulfur oxides and nitrogen oxides
• CPC Class Codes: B01J 20/046 containing halogens, e.g. halides
• CPC Class Codes: C01B 17/56 Separation; Purification
• CPC Class Codes: C01B 7/01 Chlorine; Hydrogen chloride
• CPC Class Codes: C10G 2300/207 Acid gases, e.g. H2S, COS, SO2, HCN
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

A desulfurization absorption tower, a method for setting up the same and a method for operating the same. The tower may include an internal anti-corrosion layer that may be used for contacting the flue gas and the desulfurization absorption liquid, may define the tower chamber, and may include stainless steel plate whose thickness is 1.0 mm to 6.0 mm. The tower body may include an external supporting layer that may be used for supporting the anti-corrosion layer and may include carbon steel. The supporting layer and the anti-corrosion layer may be designed to jointly bear a load, wherein the supporting layer may be designed to bear a large part of the load, and the anti-corrosion layer may be designed to bear a small part of the load.

Claims

1. Apparatus for flue-gas desulfurization, the apparatus comprising:

stainless steel plate that is configured to contact the flue gas and a desulfurization absorption liquid, the plate having a mass that has a gravitational load; and

a carbon steel support that is configured to support the plate;

wherein;

the stainless steel plate and the carbon steel support jointly support the load;

the support includes a frame that circumferentially surrounds the plate;

the frame includes vertical support columns spaced apart from each other at an interval not less than 0.5 m;

a first of the columns is connected to a second of the columns by a weld; and

the carbon steel support bears more of the load than does the steel plate.

2. The apparatus of claim 1 wherein:

the weld;

is disposed at the first column; and

attaches a beam to the first column; and

the beam connects the first column to the second column.

3. The apparatus of claim 1 wherein the first column and the second column are adjacent each other.

4. The apparatus of claim 1 wherein the stainless steel plate has a thickness in the range 1.0 mm to 6.0 mm.

5. The apparatus of claim 4 wherein the thickness is about 2.0 mm.

6. The apparatus of claim 4 wherein the thickness is about 3.0 mm.

7. The apparatus of claim 4 wherein the thickness is about 4.0 mm.

8. The apparatus of claim 4 wherein the thickness is about 5.0 mm.

9. The apparatus of claim 1 wherein the steel plate comprises a plurality of steel plates connected together to form an interior layer of a tower.

10. The apparatus of claim 1 wherein the steel plate:

is included in an interior layer of a tower that is configured to apply to the flue gas;

a first desulfurization absorption liquid having, after application to the flue gas, a first chloride ion concentration; and

a second desulfurization absorption liquid having, after application to the flue gas, a second chloride ion concentration that is different from the first chloride ion concentration;

includes;

a first composition; and

a second composition; and

defines a flue gas guide path that is configured to contact;

the first liquid with the first composition; and

the second liquid with the second composition.

11. The apparatus of claim 10 wherein:

one of the first and second compositions corresponds to a chloride ion concentration that is less than 10,000 mg/L; and

the other corresponds to a chloride ion concentration that is in the range 10,000 to 20,000 mg/L.

12. The apparatus of claim 11 wherein:

316L stainless steel corresponds to the chloride ion concentration that is less than 10,000 mg/L; and

2205 stainless steel or 2605N stainless steel correspond to a chloride ion concentration that is in the range 10,000 to 20,000 mg/L.

13. The apparatus of claim 10 wherein:

one of the first and second compositions corresponds to a chloride ion concentration that is less than 10000 mg/L; and

the other corresponds to a chloride ion concentration that is no less than 20,000 mg/L.

14. The apparatus of claim 13 wherein:

316L stainless steel corresponds to the chloride ion concentration that is less than 10,000 mg/L; and

2507 stainless steel corresponds to the chloride ion concentration that is no less than 20,000 mg/L.

15. The apparatus of claim 10 wherein:

one of the first and second compositions corresponds to a chloride ion concentration that is in the range 10,000 to 20,000 mg/L; and

the other corresponds to a chloride ion concentration that is no less than 20,000 mg/L.

16. The apparatus of claim 15 wherein:

2205 stainless steel or 2605N stainless steel correspond to the chloride ion concentration that is in the range 10,000 to 20,000 mg/L; and

2507 stainless steel corresponds to the chloride ion concentration that is no less than 20,000 mg/L.

17. The apparatus of claim 1 wherein the steel plate is included in an interior layer of a tower that is configured to desulfurize the flue gas, and:

includes;

a first section including 316L stainless steel;

a second section including 2205 stainless steel or 2605N stainless steel; and

a third section including 2507 stainless steel; and

defines a flue gas guide path along which;

the first section is configured to channel desulfurization absorption liquid having a chloride ion concentration that is less than 10,000 mg/L;

the second section is configured to channel desulfurization absorption liquid having a chloride ion concentration that is in the range 10,000 to 20,000 mg/L; and

the third section is configured to channel desulfurization absorption liquid having a chloride ion concentration that is no less than 20,000 mg/L.

18. Apparatus for flue-gas desulfurization, the apparatus comprising:

stainless steel plate that is configured to contact the flue gas and a desulfurization absorption liquid, the plate having a mass that has a gravitational load; and

a carbon steel support that is configured to support the plate;

wherein;

the stainless steel plate and the carbon steel support jointly support the load;

the support includes a frame that circumferentially surrounds the plate;

the frame includes vertical support columns spaced apart from each other at an interval not less than 0.5 m;

a first of the columns is connected to a second of the columns by a weld; and

the stainless steel plate has a thickness in the range 1.0 mm to 6.0 mm.

19. The apparatus of claim 18 wherein:

the weld;

is disposed at the first column; and

attaches a beam to the first column; and

the beam connects the first column to the second column.

20. The apparatus of claim 19 wherein the first column and the second column are adjacent each other.

21. The apparatus of claim 18 wherein the carbon steel support bears more of the load than does the steel plate.

22. The apparatus of claim 18 wherein the steel plate comprises a plurality of steel plates connected together to form an interior layer of a tower.

23. The apparatus of claim 18 wherein the steel plate:

is included in an interior layer of a tower that is configured to apply to the flue gas;

a first desulfurization absorption liquid having, after application to the flue gas, a first chloride ion concentration; and

a second desulfurization absorption liquid having, after application to the flue gas, a second chloride ion concentration that is different from the first chloride ion concentration;

includes;

a first composition; and

a second composition; and

defines a flue gas guide path that is configured to contact;

the first liquid with the first composition; and

the second liquid with the second composition.

24. The apparatus of claim 23 wherein:

one of the first and second compositions corresponds to a chloride ion concentration that is less than 10,000 mg/L; and

the other corresponds to a chloride ion concentration that is in the range 10,000 to 20,000 mg/L.

25. The apparatus of claim 24 wherein:

316L stainless steel corresponds to the chloride ion concentration that is less than 10,000 mg/L; and

2205 stainless steel or 2605N stainless steel correspond to a chloride ion concentration that is in the range 10,000 to 20,000 mg/L.

26. The apparatus of claim 23 wherein:

one of the first and second compositions corresponds to a chloride ion concentration that is less than 10000 mg/L; and

the other corresponds to a chloride ion concentration that is no less than 20,000 mg/L.

27. The apparatus of claim 26 wherein:

316L stainless steel corresponds to the chloride ion concentration that is less than 10,000 mg/L; and

2507 stainless steel corresponds to the chloride ion concentration that is no less than 20,000 mg/L.

28. The apparatus of claim 23 wherein:

one of the first and second compositions corresponds to a chloride ion concentration that is in the range 10,000 to 20,000 mg/L; and

the other corresponds to a chloride ion concentration that is no less than 20,000 mg/L.

29. The apparatus of claim 28 wherein:

2205 stainless steel or 2605N stainless steel correspond to the chloride ion concentration that is in the range 10,000 to 20,000 mg/L; and

2507 stainless steel corresponds to the chloride ion concentration that is no less than 20,000 mg/L.

30. The apparatus of claim 18 wherein the steel plate is included in an interior layer of a tower that is configured to desulfurize the flue gas, and:

includes;

a first section including 316L stainless steel;

a second section including 2205 stainless steel or 2605N stainless steel; and

a third section including 2507 stainless steel; and

defines a flue gas guide path along which;

the first section is configured to channel desulfurization absorption liquid having a chloride ion concentration that is less than 10,000 mg/L;

the second section is configured to channel desulfurization absorption liquid having a chloride ion concentration that is in the range 10,000 to 20,000 mg/L; and

the third section is configured to channel desulfurization absorption liquid having a chloride ion concentration that is no less than 20,000 mg/L.