CN110271782A - Safe maintenance method for concentrated sulfuric acid storage tank - Google Patents
Safe maintenance method for concentrated sulfuric acid storage tank Download PDFInfo
- Publication number
- CN110271782A CN110271782A CN201910368588.9A CN201910368588A CN110271782A CN 110271782 A CN110271782 A CN 110271782A CN 201910368588 A CN201910368588 A CN 201910368588A CN 110271782 A CN110271782 A CN 110271782A
- Authority
- CN
- China
- Prior art keywords
- tank
- gas
- sulfuric acid
- storage tank
- acid storage
- 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
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012423 maintenance Methods 0.000 title claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 54
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 11
- 239000001257 hydrogen Substances 0.000 claims description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims description 11
- 210000004262 dental pulp cavity Anatomy 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000004880 explosion Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a safe maintenance method of a sulfuric acid storage tank, which comprises the following steps: opening an acid discharge port, and discharging concentrated sulfuric acid stored in an acid tank to form an empty tank; filling compressed air into the empty tank along the acid discharge port, simultaneously inserting an air exhaust pipeline along a manhole on a top cover at the top of the acid tank, and exhausting residual combustible gas in the empty tank outwards; detecting the content of inflammable gas in the empty tank; when the content of inflammable gas in the empty tank is less than a preset value, the replacement is thorough, and then a welding device is used for welding and maintaining the damaged part of the top cover; reducing the content of the combustible gas in the empty tank by replacing the residual combustible gas in the empty tank; the replacement process is also provided with a gas detection step, so that the content of the gas detected by a scientific method is less than a certain safety value, and the explosion danger caused by spark or high temperature during welding is avoided.
Description
Technical field
The present invention relates to concentrated sulfuric acid storing technology field more particularly to a kind of sulfuric acid storage tank working service methods.
Background technique
The concentrated sulfuric acid is widely used as important Principles of Chemical Engineering, and the concentrated sulfuric acid generallys use sour tank in storage, in sour tank
Wall is anti-corrosion layer, and top cover is arranged in sour tank top, and manhole is arranged on top cover, since top cover is located at the top of sour tank, in the rainy day
It is long long afterwards it is easy to appear damaged or loophole using the time by acid gas corrosion, it needs to repair.
Existing several maintenance modes, first, one layer of new top cover is covered on existing top cover, not only increases set in this way
Standby cost, and the whole height of sour tank is increased, it is also very inconvenient to later maintenance；The second way is exactly that the acid tank is whole
Body is discarded not to be used, and very big waste is caused；Third is then to carry out the concentrated acid discharge in sour tank to the top cover of slack tank again
Welding maintenance, however there is very big security risk in this mode, certain factory is when welding top cover, since there are residual inside slack tank
Remaining inflammable gas, the spark that when welding generates cause the explosion of tank body, cause casualties.
The factory in welding, the problem is that, still remain inflammable gas in slack tank, the open fire fire that when welding generates
Colored to contact with remaining inflammable gas, an explosion occurred.
Summary of the invention
It is a kind of by substitute mode it is necessary to propose, so that inflammable gas replaces thorough concentrated sulfuric acid tank top in sour tank
Method for maintaining.
A kind of sulfuric acid storage tank working service method, comprising the following steps:
Acid discharge mouth is opened, the concentrated sulfuric acid stored in sour tank is discharged, forms slack tank；
Compressed air is filled with into slack tank along acid discharge mouth, meanwhile, exhaust tube is inserted into along the manhole on the top cover of sour tank top
Remaining inflammable gas in slack tank is extracted in road out outward；
Detect the inflammable gas content inside slack tank；
When inflammable gas content inside slack tank is less than predetermined value, displacement thoroughly, is later broken top cover using welder
Damage position carries out welding maintenance.
Preferably, the pump-line is a root canal road, and a pump-line stretches to inside slack tank close to top
The position of lid.
Preferably, the pump-line is a root canal road, and a pump-line stretches to 1/2 height inside slack tank
Position.
Preferably, the pump-line is two root canal roads, and two pump-lines are respectively to stretch to inside slack tank
The first tracheae close to top cover position and the second tracheae close to bottom position.
Preferably, gas detecting instrument is used when detection gas content in third step, above-mentioned gas detector is placed
At manhole, to detect the content of slack tank internal hydrogen.
Preferably, gas detecting instrument is used when detection gas content in third step, above-mentioned gas detector is hung
To flexible cord, tank interior is stretched to along manhole, until close to tank base, to detect the sulfur trioxide inside slack tank
Content.
Preferably, the remaining inflammable gas extracted out in slack tank is sprayed, to absorb dust in residual gas and easily
It is dissolved in the gas of water.
Preferably, the medium used is sprayed as water.
Preferably, spray sprays mode using convection type, to increase the contact surface of gas or dust and spray media contact
Product.
The present invention reduces the inflammable gas content in slack tank by inflammable gas remaining in displacement slack tank.This is transposed
The step of gas detection is also provided in journey, in this way, avoiding welding by the small Mr. Yu's safety value of scientific method detection gas content
When, because generate spark or due to high temperature caused by explosion danger.
Certainly, the method for the present invention is also applied for carrying out other any position breakages of sour tank processing when welding is repaired.
Detailed description of the invention
Fig. 1 is the schematic diagram of the sulfuric acid storage tank working service method.
Fig. 2 is the schematic diagram of the sulfuric acid storage tank working service method.Wherein, two 20 labels indicate gas detecting instrument
Two states figure.
In figure: storage tank 10, acid discharge mouth 11, top cover 12, the first tracheae 13, the second tracheae 14, gas detecting instrument 20, spray column
30。
Specific embodiment
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, common for this field
For technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Referring to Fig. 1, Fig. 2, the embodiment of the invention provides a kind of 10 working service methods of sulfuric acid storage tank, including following step
It is rapid:
Acid discharge mouth 11 is opened, the concentrated sulfuric acid stored in sour tank is discharged, forms slack tank；
Compressed air is filled with into slack tank along acid discharge mouth 11, meanwhile, it is inserted into and takes out along the manhole on the top cover 12 of sour tank top
Feed channel extracts remaining inflammable gas in slack tank out outward；
Detect the inflammable gas content inside slack tank；
When inflammable gas content inside slack tank is less than predetermined value, displacement thoroughly, is later broken top cover using welder
Damage position carries out welding maintenance.
Further, the pump-line is a root canal road, and a pump-line stretches to inside slack tank close to top
The position of lid.
Further, the pump-line is a root canal road, and a pump-line stretches to 1/2 height inside slack tank
Position.
Further, the pump-line is two root canal roads, and two pump-lines are respectively to stretch to inside slack tank
The first tracheae 13 close to top cover position and the second tracheae 14 close to bottom position.
Since the main component of remaining inflammable gas is hydrogen and sulfur trioxide, the specific gravity of hydrogen is less than the ratio of compressed air
Weight is aspirated by the first tracheae and is discharged so hydrogen rises near top cover automatically upwards, and the specific gravity of sulfur trioxide is greater than compression
The specific gravity of air, it is easy to tank base is deposited on, so the second tracheae of setting more connects close to the position of bottom with sulfur trioxide
Closely, it is easier to be sucked out.
Further, gas detecting instrument 20 is used when detection gas content in third step, by above-mentioned gas detector 20
It is placed at manhole, to detect the content of slack tank internal hydrogen.
Since hydrogen specific gravity is lighter, when detection, is placed at manhole, accurately to detect the content of hydrogen in tank.
Further, gas detecting instrument 20 is used when detection gas content in third step, by above-mentioned gas detector 20
Below suspension to flexible cord, tank interior is stretched to along manhole, until close to tank base, to detect three oxygen inside slack tank
Change the content of sulphur.Certainly, gas detecting instrument 20 herein can select the instrument of two kinds of models, be respectively suitable for detection hydrogen and
Sulfur trioxide.
It since sulfur trioxide specific gravity is larger, is easy to be deposited on bottom, so stretching gas detecting instrument 20 using hang
Enter to close bottom, to really reflect the content of the sulfur trioxide inside slack tank by the data of detection.
Further, the remaining inflammable gas extracted out in slack tank is sprayed, to absorb dust in residual gas and easily
It is dissolved in the gas of water.
Residual gas is hydrogen and sulfur trioxide mixture, and sulfur trioxide is highly soluble in water, and hydrogen is then from spray column 30
Top discharge, environmental pollution will not be caused.
Further, the medium used is sprayed as water.
Further, spray sprays mode using convection type, to increase the contact surface of gas or dust and spray media contact
Product.
Module or unit in the device of that embodiment of the invention can be combined, divided and deleted according to actual needs.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and wants according to right of the present invention
Made equivalent variations is sought, is still belonged to the scope covered by the invention.
Claims (9)
1. a kind of sulfuric acid storage tank working service method, it is characterised in that the following steps are included:
Acid discharge mouth is opened, the concentrated sulfuric acid stored in sour tank is discharged, forms slack tank；
Compressed air is filled with into slack tank along acid discharge mouth, meanwhile, exhaust tube is inserted into along the manhole on the top cover of sour tank top
Remaining inflammable gas in slack tank is extracted in road out outward；
Detect the inflammable gas content inside slack tank；
When inflammable gas content inside slack tank is less than predetermined value, displacement thoroughly, is later broken top cover using welder
Damage position carries out welding maintenance.
2. sulfuric acid storage tank working service method as described in claim 1, it is characterised in that: the pump-line is a root canal
Road, and a pump-line stretches to the position inside slack tank close to top cover.
3. sulfuric acid storage tank working service method as described in claim 1, it is characterised in that: the pump-line is a root canal
Road, and a pump-line stretches to the position of 1/2 height inside slack tank.
4. sulfuric acid storage tank working service method as described in claim 1, it is characterised in that: the pump-line is two root canals
Road, and two pump-lines are respectively to stretch to inside slack tank close to the first tracheae of top cover position and close to bottom position
The second tracheae.
5. sulfuric acid storage tank working service method as described in claim 1, it is characterised in that: detection gas contain in third step
Gas detecting instrument is used when amount, above-mentioned gas detector is placed at manhole, to detect the content of slack tank internal hydrogen.
6. sulfuric acid storage tank working service method as described in claim 1, it is characterised in that: detection gas contain in third step
Gas detecting instrument is used when amount, and above-mentioned gas detector is hung to flexible cord, stretches to tank interior along manhole,
To close tank base, to detect the content of the sulfur trioxide inside slack tank.
7. sulfuric acid storage tank working service method as described in claim 1, it is characterised in that: inflammable to the remnants extracted out in slack tank
Gas is sprayed, to absorb the dust and gas soluble easily in water in residual gas.
8. sulfuric acid storage tank working service method as claimed in claim 7, it is characterised in that: spray the medium used as water.
9. sulfuric acid storage tank working service method as claimed in claim 8, it is characterised in that: spray uses convection type spray side
Formula, to increase the contact area of gas or dust and spray media contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910368588.9A CN110271782A (en) | 2019-05-05 | 2019-05-05 | Safe maintenance method for concentrated sulfuric acid storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910368588.9A CN110271782A (en) | 2019-05-05 | 2019-05-05 | Safe maintenance method for concentrated sulfuric acid storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110271782A true CN110271782A (en) | 2019-09-24 |
Family
ID=67959858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910368588.9A Pending CN110271782A (en) | 2019-05-05 | 2019-05-05 | Safe maintenance method for concentrated sulfuric acid storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110271782A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112025122A (en) * | 2020-08-20 | 2020-12-04 | 衡阳华宏化工实业有限公司 | Welding maintenance method for concentrated sulfuric acid storage tank |
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2019
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Patent Citations (7)
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| WO2011033678A1 (en) * | 2009-09-21 | 2011-03-24 | 株式会社サンフロイント | Tank repair method and tank repair device |
| CN101890418A (en) * | 2009-12-30 | 2010-11-24 | 杜扬 | Intrinsically safe method for exhausting oil gas of oil storage tank |
| CN202844834U (en) * | 2012-10-19 | 2013-04-03 | 中国石油化工股份有限公司 | Ethylene oxide recovery device |
| CN104964159A (en) * | 2015-05-29 | 2015-10-07 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Replacement method of ammonia gas in liquid ammonia storage tank |
| CN205652646U (en) * | 2016-03-18 | 2016-10-19 | 新乡市诚德能源科技装备有限公司 | Vacuum can |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112025122A (en) * | 2020-08-20 | 2020-12-04 | 衡阳华宏化工实业有限公司 | Welding maintenance method for concentrated sulfuric acid storage tank |
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| 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 |
Application publication date: 20190924 |
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| RJ01 | Rejection of invention patent application after publication |