CN113042481A - Method for on-line cleaning regular packing of absorption tower by hydrochloric acid regeneration system - Google Patents
Method for on-line cleaning regular packing of absorption tower by hydrochloric acid regeneration system Download PDFInfo
- Publication number
- CN113042481A CN113042481A CN202110235961.0A CN202110235961A CN113042481A CN 113042481 A CN113042481 A CN 113042481A CN 202110235961 A CN202110235961 A CN 202110235961A CN 113042481 A CN113042481 A CN 113042481A
- Authority
- CN
- China
- Prior art keywords
- absorption tower
- valve
- pipeline
- hydrochloric acid
- cleaning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
Abstract
The invention discloses a method for cleaning regular packing of an absorption tower on line by a hydrochloric acid regeneration system, which comprises the absorption tower, wherein the top of the absorption tower is provided with an absorption tower spray device, the bottom of the absorption tower is provided with a manhole cover and is connected with a regeneration acid tank through a pipeline II, the regeneration acid tank is connected with a Venturi scrubbing tower through a pipeline II, and the top of the Venturi scrubbing tower is provided with a Venturi scrubbing tower spray device; the second pipeline is sequentially connected with a first deacidification pump, a first valve and a second valve in series, and the absorption tower spraying device is connected between the first valve and the second valve through a third pipeline; the cleaning method comprises the following steps: opening the first valve, closing the second valve, starting the first hydrochloric acid pump, and continuously pumping the hydrochloric acid into the absorption tower; the manhole cover was opened and observed from its color until it became light yellow. According to the invention, under the condition that the absorption tower filler is not removed and cleaned, the iron powder adsorbed by the absorption tower filler is cleaned by using the medium of the existing system, so that the specific surface area of the absorption tower filler is ensured, and the absorption effect of the absorption tower is ensured.
Description
Technical Field
The invention belongs to the technical field of cleaning methods of waste hydrochloric acid regeneration systems in cold rolling plants, and particularly relates to a method for cleaning regular packing of an absorption tower on line by using a hydrochloric acid regeneration system.
Background
The waste hydrochloric acid regeneration system of the cold rolling plant adopts an absorption tower filled with regular packing with a certain height, the packing adopts plate-type corrugated packing, the specific surface area is 150 square meters per m for square planting, and the inclination angle of the corrugation is 45 degrees. The absorption method of the hydrochloric acid regeneration process is that rinse water sprayed on the upper part in an absorption tower is in countercurrent contact with flue gas entering from the bottom, and hydrogen chloride gas in the flue gas is absorbed to form hydrochloric acid. Regular packing filled in the tower increases the gas-liquid contact area, fully improves the absorption efficiency, and ensures the absorption effect and the concentration of produced hydrochloric acid.
The flue gas generated by the waste hydrochloric acid regeneration unit contains a certain amount of Fe in addition to the hydrogen chloride gas2O3. Iron powder can adsorb in the ripple hole of regular packing gradually in the operation process, and the unit is more and more along with the iron powder of adsorption after a period of time of operation. The regular packing is gradually filled with iron powder from the bottom to the corrugated hole at the top, so that the specific surface area of the regular packing of the whole absorption tower is reduced, the absorption effect of the absorption tower is poor, and hydrogen chloride gas cannot be fully and effectively absorbed. In severe cases, the excessive hydrogen chloride gas in the tail gas can cause environmental pollution accidents. Meanwhile, after the filler absorbs too much iron powder, the weight of the filler of the whole absorption tower is multiplied, and the filler support and the tower body are damaged.
In order to ensure the adsorption effect of the absorption tower filler and eliminate the hidden danger of equipment. The filler in the whole tower body needs to be removed periodically to clean the iron powder. The dismantling and reloading processes need to be carried out in the tower manually, the safety risk is high, the time consumption is long, and the efficiency is low, so that the normal production rhythm of the unit is influenced to a certain degree.
Disclosure of Invention
The invention provides a method for cleaning regular packing of an absorption tower on line by a hydrochloric acid regeneration system, which ensures the specific surface area of the packing of the absorption tower and the absorption effect of the absorption tower by cleaning iron powder adsorbed by the packing of the absorption tower through a medium of the existing system under the condition of not dismantling and cleaning the packing of the absorption tower.
In order to solve the technical problems, the invention adopts the technical scheme that:
the hydrochloric acid regeneration system comprises an absorption tower filled with regular packing, an absorption tower spray device is installed at the top of the absorption tower, a manhole cover is installed at the bottom of the absorption tower, the bottom of the absorption tower is connected with a regenerated acid tank through a pipeline II, the regenerated acid tank is connected with a Venturi scrubbing tower through a pipeline II, and a Venturi scrubbing tower spray device is installed at the top of the Venturi scrubbing tower; the second pipeline is sequentially connected with a first deacidification pump, a first valve and a second valve in series, and the absorption tower spraying device is connected between the first valve and the second valve through a third pipeline to form a three-way structure;
the method for cleaning the regular packing of the absorption tower on line by the hydrochloric acid regeneration system comprises the following specific steps:
A. opening the first valve, closing the second valve, starting the first re-acid pump, and continuously pumping the hydrochloric acid with the concentration of 180-200 g/L into the absorption tower;
B. and then, opening a manhole cover at the bottom of the absorption tower, and observing the color of the cleaning liquid flowing out of the manhole cover until the cleaning liquid is faint yellow to indicate that the on-line cleaning of the filler is finished.
In the above technical solution, a more specific technical solution is:
pipeline two connects on the venturi scrubbing tower spray set, the bottom of venturi scrubbing tower is passed through pipeline four and is connected the second valve with form tee bend structure between the venturi scrubbing tower spray set, just be equipped with the circulating pump on the pipeline four.
Furthermore, a branch which flows back to the regeneration acid tank is arranged between the regeneration acid tank and the first regeneration pump, and the branch is sequentially connected with a second regeneration pump and a third valve in series.
Further, a fourth valve is connected in series between the second re-acid pump and the third valve, and the branch is connected with the second pipeline through a fifth pipeline at a position between the third valve and the fourth valve.
Further, a fifth valve is connected in series between the first sour pump and the first valve, and the second pipe is connected to the fifth pipe at a position between the first valve and the fifth valve.
Further, the absorption tower is connected with the venturi scrubber through a sixth pipeline.
Further, the concentration of the hydrochloric acid is 200 g/L.
By adopting the technical scheme, the beneficial effects are as follows:
1. the invention firstly sets a pipeline on the outlet pipeline of the regenerated acid pump in the existing hydrochloric acid regeneration system, the pipeline is connected to the spray pipeline of the absorption tower and is communicated with the outlet pipeline of the regenerated acid pump, and a cut-off valve is arranged to form a three-way structure with the outlet pipeline of the original regenerated acid pump, and the three-way structure respectively controls the flow direction of media; then, pumping hydrochloric acid with the concentration of 200g/L in a regenerated acid tank into an absorption tower filled with regular packing through an absorption tower spraying device by using the conventional regenerated acid pump, and forming the following chemical reaction with iron powder particles adsorbed by the packing:
therefore, the iron powder particles adsorbed by the filler are thoroughly cleaned under the condition that the filler of the absorption tower is not detached and cleaned, the specific surface area of the filler of the absorption tower is ensured, and the absorption effect of the absorption tower is ensured.
2. According to the invention, the existing on-line equipment is improved, so that the absorption tower filler realizes an on-line cleaning function, and the absorption tower filler does not need to be integrally disassembled for one-layer off-line cleaning, so that the flexibility of the filler cleaning time is improved, the labor intensity of workers is reduced, the discharge of cleaning waste liquid is avoided, and the risk of environmental pollution is avoided.
3. The invention does not need additional equipment, has small investment and low cleaning cost.
4. The method for cleaning the regular packing of the absorption tower on line can recover the specific surface area of the regular packing in the absorption tower to the level of primary filling, obviously enhance the absorption effect of the absorption tower, ensure that the absorption efficiency can reach 99.3 percent and ensure that the content of hydrogen chloride in tail gas reaches the national standard level.
5. The invention can thoroughly clean the regular packing in the absorption tower, so that the weight of the regular packing is reduced, and the equipment safety is ensured.
Drawings
FIG. 1 is a schematic diagram of the hydrochloric acid regeneration system of the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention is described in further detail below with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of a hydrochloric acid regeneration system of the present invention, which includes an absorption tower 1 filled with regular packing, an absorption tower spray device 2 is installed at the top of the absorption tower 1, a manhole cover 3 is installed at the bottom of the absorption tower 1, the bottom of the absorption tower 1 is connected with a regeneration acid tank 5 through a first pipeline 4, the regeneration acid tank 5 is connected with a venturi scrubber 7 through a second pipeline 6, and a venturi scrubber spray device 8 is installed at the top of the venturi scrubber 7; wherein, the second pipeline 6 is connected in series with a first sour recycle pump 9, a first valve 10 and a second valve 11 in sequence from the outlet direction of the sour recycle tank 5, the absorption tower spray device 2 is connected between the first valve 10 and the second valve 11 through a third pipeline 12 to form a three-way structure;
the second pipeline 6 is connected to the venturi washing tower spray device 8, the bottom of the venturi washing tower 7 is connected between the second valve 11 and the venturi washing tower spray device 8 through the fourth pipeline 13 to form a three-way structure, and the fourth pipeline 13 is provided with a circulating pump 14;
a branch 15 which flows back to the regeneration acid tank 5 is arranged between the regeneration acid tank 5 and the first regeneration pump 9, and a second regeneration pump 16 and a third valve 17 are sequentially connected in series on the branch 15 from the outlet direction of the regeneration acid tank 5;
a fourth valve 18 is connected in series between the second re-acid pump 16 and the third valve 17, and the branch 15 is connected with a second pipeline 6 through a fifth pipeline 19 at a position between the third valve 17 and the fourth valve 18;
a fifth valve 20 is connected in series between the first deacidification pump 9 and the first valve 10, and a second pipeline 6 is connected with a fifth pipeline 19 at a position between the first valve 10 and the fifth valve 20;
the absorption tower 1 is connected with the Venturi scrubbing tower 7 through a pipeline six 21;
the method for cleaning the regular packing of the absorption tower on line by the hydrochloric acid regeneration system comprises the following specific steps:
A. opening the first valve 10, closing the second valve 11, and activating the second valveA re-acidification pump 9, which continuously conveys the hydrochloric acid with the concentration of 200g/L to a nozzle of the spray device 2 of the absorption tower, and sprays the regular packing filled in the absorption tower 1, so that the hydrochloric acid and the iron powder particles adsorbed by the packing form the following chemical reaction:
；
B. then, opening a manhole cover 3 at the bottom of the absorption tower 1, and observing the color of the cleaning liquid flowing out of the manhole cover 3 until the cleaning liquid is light yellow to indicate that the on-line cleaning of the filler is finished; wherein the specific cleaning effect can be judged by observing the color of the cleaned solution. If the color of the cleaning liquid is changed from red to faint yellow presented by hydrochloric acid, the completion of the cleaning of the filler can be judged; meanwhile, the waste liquid generated after cleaning automatically flows into a regeneration acid tank through valve switching at the bottom of the absorption tower.
Through the cleaning process, the iron powder particles adsorbed by the regular packing in the absorption tower can be thoroughly cleaned, so that the specific surface area of the regular packing is restored to the level of primary filling, the absorption effect of the absorption tower is obviously enhanced, and the absorption efficiency can reach about 99.3%.
Claims (7)
1. A method for cleaning regular packing of an absorption tower on line by a hydrochloric acid regeneration system comprises the absorption tower filled with the regular packing, wherein the top of the absorption tower is provided with an absorption tower spray device, the bottom of the absorption tower is provided with a manhole cover, the bottom of the absorption tower is connected with a regeneration acid tank through a pipeline, the regeneration acid tank is connected with a Venturi scrubbing tower through a pipeline II, and the top of the Venturi scrubbing tower is provided with a Venturi scrubbing tower spray device; wherein, pipeline two is established ties in proper order and is had first sour pump, first valve and second valve, its characterized in that: the absorption tower spraying device is connected between the first valve and the second valve through a third pipeline to form a three-way structure;
the method for cleaning the regular packing of the absorption tower on line by the hydrochloric acid regeneration system comprises the following specific steps:
A. opening the first valve, closing the second valve, starting the first re-acid pump, and continuously pumping the hydrochloric acid with the concentration of 180-200 g/L into the absorption tower;
B. and then, opening a manhole cover at the bottom of the absorption tower, and observing the color of the cleaning liquid flowing out of the manhole cover until the cleaning liquid is faint yellow to indicate that the on-line cleaning of the filler is finished.
2. The method for cleaning the regular packing of the absorption tower on line by the hydrochloric acid regeneration system as claimed in claim 1, wherein:
pipeline two connects on the venturi scrubbing tower spray set, the bottom of venturi scrubbing tower is passed through pipeline four and is connected the second valve with form tee bend structure between the venturi scrubbing tower spray set, just be equipped with the circulating pump on the pipeline four.
3. The method for cleaning the regular packing of the absorption tower on line by the hydrochloric acid regeneration system as claimed in claim 2, wherein:
a branch which flows back to the regeneration acid tank is arranged between the regeneration acid tank and the first regeneration pump, and the branch is sequentially connected with a second regeneration pump and a third valve in series.
4. The method for cleaning the regular packing of the absorption tower on line by the hydrochloric acid regeneration system as claimed in claim 3, wherein:
a fourth valve is connected in series between the second re-acid pump and the third valve, and the branch is connected with the second pipeline through a fifth pipeline at the position between the third valve and the fourth valve.
5. The method for cleaning the regular packing of the absorption tower on line by the hydrochloric acid regeneration system as claimed in claim 4, wherein:
a fifth valve is connected in series between the first sour pump and the first valve, and the second pipe is connected to the fifth pipe at a position between the first valve and the fifth valve.
6. The method for cleaning the regular packing of the absorption tower on line by the hydrochloric acid regeneration system as claimed in claim 5, wherein:
the absorption tower is connected with the Venturi scrubbing tower through a sixth pipeline.
7. The method for the on-line cleaning of the regular packing of the absorption tower by the hydrochloric acid regeneration system as claimed in claim 1, 2, 3, 4, 5 or 6, wherein the method comprises the following steps:
the concentration of the hydrochloric acid is 200 g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110235961.0A CN113042481A (en) | 2021-03-03 | 2021-03-03 | Method for on-line cleaning regular packing of absorption tower by hydrochloric acid regeneration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110235961.0A CN113042481A (en) | 2021-03-03 | 2021-03-03 | Method for on-line cleaning regular packing of absorption tower by hydrochloric acid regeneration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113042481A true CN113042481A (en) | 2021-06-29 |
Family
ID=76509693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110235961.0A Pending CN113042481A (en) | 2021-03-03 | 2021-03-03 | Method for on-line cleaning regular packing of absorption tower by hydrochloric acid regeneration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113042481A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02310386A (en) * | 1989-05-23 | 1990-12-26 | Nisshin Steel Co Ltd | Method for recovering hydrochloric acid in steel material pickling device |
| US5939041A (en) * | 1996-10-30 | 1999-08-17 | Andritz-Patentverwaltungs-Gesellschaft M.B.H. | Process and apparatus for removing metal oxide particles in the regeneration of pickling acids |
| JP2009274906A (en) * | 2008-05-14 | 2009-11-26 | Jfe Steel Corp | Hydrochloric acid recovering apparatus and method for recovering hydrochloric acid from waste hydrochloric acid solution |
| CN103073120A (en) * | 2012-09-21 | 2013-05-01 | 河北兆江养殖有限公司 | Biogas slurry purification technology |
| CN104259156A (en) * | 2014-10-08 | 2015-01-07 | 中冶南方工程技术有限公司 | Automatic cleaning system and method of feeding pipeline of roaster |
| CN105887108A (en) * | 2016-04-06 | 2016-08-24 | 中冶南方工程技术有限公司 | Hydrochloric acid waste liquid regenerating method and system |
| CN205874546U (en) * | 2016-07-28 | 2017-01-11 | 鞍钢集团工程技术有限公司 | Device that increases acid recovery rate is retrieved in cold rolling sour regeneration absorption tower circulation |
| CN205999486U (en) * | 2016-08-26 | 2017-03-08 | 武汉钢铁股份有限公司 | A kind of cold rolling acid regeneration device that can eliminate iron oxide in pickling tail gas |
| CN108654312A (en) * | 2018-03-27 | 2018-10-16 | 中冶南方工程技术有限公司 | A kind of hydrochloric acid regenerating device and technique of flue gas cooling |
| CN208586359U (en) * | 2018-06-15 | 2019-03-08 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of device cleaning absorption tower internal oxidition iron powder |
| CN110124463A (en) * | 2019-06-11 | 2019-08-16 | 湖北瑞力源环保科技有限公司 | A kind of exhaust gas purification system and technique for spray roasting hydrochloric acid regenerating device |
| CN111603891A (en) * | 2019-02-22 | 2020-09-01 | 宝钢新日铁汽车板有限公司 | Flue gas absorption washing system and method |
-
2021
- 2021-03-03 CN CN202110235961.0A patent/CN113042481A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02310386A (en) * | 1989-05-23 | 1990-12-26 | Nisshin Steel Co Ltd | Method for recovering hydrochloric acid in steel material pickling device |
| US5939041A (en) * | 1996-10-30 | 1999-08-17 | Andritz-Patentverwaltungs-Gesellschaft M.B.H. | Process and apparatus for removing metal oxide particles in the regeneration of pickling acids |
| JP2009274906A (en) * | 2008-05-14 | 2009-11-26 | Jfe Steel Corp | Hydrochloric acid recovering apparatus and method for recovering hydrochloric acid from waste hydrochloric acid solution |
| CN103073120A (en) * | 2012-09-21 | 2013-05-01 | 河北兆江养殖有限公司 | Biogas slurry purification technology |
| CN104259156A (en) * | 2014-10-08 | 2015-01-07 | 中冶南方工程技术有限公司 | Automatic cleaning system and method of feeding pipeline of roaster |
| CN105887108A (en) * | 2016-04-06 | 2016-08-24 | 中冶南方工程技术有限公司 | Hydrochloric acid waste liquid regenerating method and system |
| CN205874546U (en) * | 2016-07-28 | 2017-01-11 | 鞍钢集团工程技术有限公司 | Device that increases acid recovery rate is retrieved in cold rolling sour regeneration absorption tower circulation |
| CN205999486U (en) * | 2016-08-26 | 2017-03-08 | 武汉钢铁股份有限公司 | A kind of cold rolling acid regeneration device that can eliminate iron oxide in pickling tail gas |
| CN108654312A (en) * | 2018-03-27 | 2018-10-16 | 中冶南方工程技术有限公司 | A kind of hydrochloric acid regenerating device and technique of flue gas cooling |
| CN208586359U (en) * | 2018-06-15 | 2019-03-08 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of device cleaning absorption tower internal oxidition iron powder |
| CN111603891A (en) * | 2019-02-22 | 2020-09-01 | 宝钢新日铁汽车板有限公司 | Flue gas absorption washing system and method |
| CN110124463A (en) * | 2019-06-11 | 2019-08-16 | 湖北瑞力源环保科技有限公司 | A kind of exhaust gas purification system and technique for spray roasting hydrochloric acid regenerating device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201880482U (en) | Stepped spray tower for desulfurization by ammonia method | |
| CN202606007U (en) | Ammonia desulfurization and denitrification tower | |
| CN201912887U (en) | Horizontal type desulfurization tower | |
| CN201249100Y (en) | Rotary spray thionizer | |
| CN101597529B (en) | Methane bio-desulfurization device | |
| CN206631400U (en) | A kind of two level cross-flow horizontal washing tower | |
| CN211913331U (en) | Horizontal PP spray tower | |
| CN206229197U (en) | One kind layering component single cycle spray desulphurization system | |
| CN204365121U (en) | A kind of multistage purification fibreglass epoxy acid mist purifying column | |
| CN201578982U (en) | Novel acid generation washing tower | |
| CN204522719U (en) | Flue gas processing equipment of boiler | |
| CN205340550U (en) | Sour system tail gas sprays water purification retrieval and utilization and buck emission scrubbing tower | |
| CN201058281Y (en) | Desulfurized dust collector | |
| CN102580504A (en) | Novel ammonia desulphurization absorption device | |
| CN102343209B (en) | Seawater flue gas desulphurization (FGD) system applying boiler blowdown water | |
| CN113042481A (en) | Method for on-line cleaning regular packing of absorption tower by hydrochloric acid regeneration system | |
| CN204973533U (en) | Cold rolled stainless steel pickling exhaust purification system | |
| CN106268232A (en) | The processing means of a kind of waste gas containing fluoride and processing method | |
| CN210845845U (en) | Environment-friendly spray purification tower for rapidly treating waste gas | |
| CN208799958U (en) | A kind of horizontal calcium method desulfurizing tower | |
| CN208786038U (en) | A kind of chemical emission spray washing treating column | |
| CN206570161U (en) | A kind of graphite fluorine-containing waste water processing apparatus | |
| CN213050094U (en) | Biological washing waste gas treatment device | |
| CN109609228A (en) | Biogas environmental protection purifying plant | |
| CN214715406U (en) | Spray tower |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210629 |