CN106557101A - In Waste Sulfuric Acid cracking concentrated sulphuric acid in pyrolysis furnace index control method - Google Patents
In Waste Sulfuric Acid cracking concentrated sulphuric acid in pyrolysis furnace index control method Download PDFInfo
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- CN106557101A CN106557101A CN201510630964.9A CN201510630964A CN106557101A CN 106557101 A CN106557101 A CN 106557101A CN 201510630964 A CN201510630964 A CN 201510630964A CN 106557101 A CN106557101 A CN 106557101A
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- pyrolysis furnace
- coefficient
- acid
- control system
- control method
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 46
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005336 cracking Methods 0.000 title claims abstract description 18
- 239000002699 waste material Substances 0.000 title claims abstract description 15
- 235000011149 sulphuric acid Nutrition 0.000 title claims abstract description 10
- 239000001117 sulphuric acid Substances 0.000 title claims abstract description 10
- 239000002253 acid Substances 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 18
- 239000002737 fuel gas Substances 0.000 claims abstract description 13
- 239000007921 spray Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000000889 atomisation Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical class [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 2
- 229940069428 antacid Drugs 0.000 abstract description 2
- 239000003159 antacid agent Substances 0.000 abstract description 2
- 230000001458 anti-acid effect Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The present invention relates to the control method in a kind of Waste Sulfuric Acid cracking concentrated sulphuric acid technique in the pyrolysis furnace.In Waste Sulfuric Acid cracking concentrated sulphuric acid pyrolysis furnace, technic index is controlled by different locking systems.The control system of cracking furnace temperature, is that temperature spot is arranged in pyrolysis furnace, chain with fuel gas inlet valve.Coefficient of excess air control system, is the setting coefficient of excess air test point after pyrolysis furnace, chain with the effusion meter of pyrolysis furnace air intlet.Spent acid and gas mixing uniformity control system, is characterized in that visor is arranged on pyrolysis furnace, and spent acid is entered in pyrolysis furnace by ultrasonic atomization spray gun, observe atomizing effect by visor and are adjusted.Ensure that the indexs such as cracking in-furnace temperature, coefficient of excess air, spent acid and the gas mixing uniformity are maintained in the range of technological requirement.The sulfur dioxide gas for being effectively guaranteed acid making system meet the requirement of antacid.
Description
Technical field
The invention belongs to the chemical technology field that castoff regenerative is recycled, it is related to a kind of control method of index in pyrolysis furnace in Waste Sulfuric Acid cracking concentrated sulphuric acid technique.
Background technology
The Waste Sulfuric Acid produced in the production process of petrochemical industry, typically 70%～90%, also containing Organic substance and a small amount of moisture content, generally existing the problem for being difficult to recycle to sulfuric acid concentration.Process the optimum method of this kind of spent acid be using Pintsch process handling process, can be by the finished product sulfuric acid of low concentration Waste Sulfuric Acid regeneration 98% that mass percent is 70%～90%.And the control method that cracks in this cracking process is most important, the index such as temperature, coefficient of excess air, spent acid and gas mixing uniformity determines whether Waste Sulfuric Acid can crack completely。Only these indexs are effectively controlled, Waste Sulfuric Acid fully could be cracked, obtained qualified SO2Gas sends into the finished product sulfuric acid that acid making system generates 98%.The reaction temperature of spent acid Pintsch process is controlled at 900 DEG C～1300 DEG C, to ensure that spent acid can decompose completely.Coefficient of excess air is controlled 5 ~ 20%, it is ensured that is not produced the blocking that Sublimed Sulfur causes system equipment and pipeline, is caused the loss of sulfur.Coefficient of excess air is too high, can suppress SO2Generation, produce by-product SO3.Spent acid control is entered in stove and gas mixing in spray pattern, to ensure that spent acid fully can decompose.
The content of the invention
The present invention is for the rigors in current Waste Sulfuric Acid cracking technology to control indexes in pyrolysis furnace, there is provided new control method.
The present invention is achieved like this：In Waste Sulfuric Acid cracking concentrated sulphuric acid in pyrolysis furnace index control method, it is characterized in that including pyrolysis furnace temperature control system, coefficient of excess air control system, spent acid and gas mixing uniformity control system.
Usually, the pyrolysis furnace temperature control system, is that temperature spot is arranged in pyrolysis furnace, chain with fuel gas inlet valve.
The coefficient of excess air control system, is the setting coefficient of excess air test point after pyrolysis furnace, chain with the effusion meter of pyrolysis furnace air intlet.
The spent acid and gas mixing uniformity control system, are that visor is arranged on pyrolysis furnace, and spent acid is entered in pyrolysis furnace by ultrasonic atomization spray gun, observe atomizing effect by visor and are adjusted.
In Waste Sulfuric Acid cracking concentrated sulphuric acid pyrolysis furnace of the present invention, technic index is controlled by different locking systems.The control system of cracking furnace temperature, is that temperature spot is arranged in pyrolysis furnace, chain with fuel gas inlet valve, when temperature is less than 900 DEG C, opens big imported valve, improves fuel gas supply；Conversely, when temperature is more than 1300 DEG C, turning down imported valve, fuel gas supply is reduced, form the temperature control system of complete set.To maintain to crack stablizing for in-furnace temperature.
Coefficient of excess air control system, is that coefficient of excess air test point i.e. air coefficient table is arranged after pyrolysis furnace, is connected with the effusion meter of pyrolysis furnace air intlet, carries out flow-control.When coefficient of excess is less than 5%, large capacity meter is driven, improve amount of supplied air；Conversely, when coefficient of excess is more than 20%, turning down effusion meter, amount of supplied air is reduced, form the coefficient of excess air control system of complete set.To maintain stablizing for cracking reaction in pyrolysis furnace.Technological requirement is reached so as to be effectively guaranteed pyrolysis furnace outlet.To meet the requirement of acid making system, follow-up acid making system is made to run with security and stability.
Spent acid and gas mixing uniformity control system, are that visor is arranged on pyrolysis furnace, and spent acid is entered in pyrolysis furnace by ultrasonic atomization spray gun, if it was observed that atomizing effect is bad, adjusting the fitness of spent acid amount and spray gun, spent acid is uniformly mixed with gas.
The control method of the present invention, it is ensured that the index such as cracking in-furnace temperature, coefficient of excess air, spent acid and gas mixing uniformity is maintained in the range of technological requirement.The sulfur dioxide gas for being effectively guaranteed acid making system meet the requirement of antacid.Avoid that the change fluctuation of traditional pyrolysis furnace production operation gas componant is larger, spent acid decomposes incomplete, the shortcoming of follow-up system fluctuation of service.Farthest make sulfur waste acid cleavage reaction fully complete.
Description of the drawings
Sketch of the accompanying drawing 1 for technic index control method in pyrolysis furnace in the embodiment of the present invention.
In accompanying drawing, 1- spent acid spray guns, 2- main burners, 3- air blowers, 4- pyrolysis furnaces, 5- auxiliary burners, the main self-adjusting valves of 6-, 7- pair self-adjusting valves, 8- temperature thermo-couplers, 9- temperature thermo-couplers, 10- air coefficient tables, 11- effusion meters.
Specific embodiment
The inventive method is described in detail in reference to embodiment.
Embodiment：Following examples are referring to accompanying drawing 1.
The present embodiment is that spent acid sprays into pyrolysis furnace with spray pattern by ultrasonic atomization spray gun, cracks under 900 ~ 1300 DEG C of high temperature by taking the 25kt/a spent acid cracking sulphuric acid plant of certain petro-chemical corporation as an example.Heat is provided with air reaction heat by fuel gas.4 Pintsch process Waste Sulfuric Acid of pyrolysis furnace, as reaction is carried out, when 4 front-end temperature of pyrolysis furnace is less than 900 DEG C, the self-regulated valve group 6 on 2 fuel gas admission line of big main burner is opened, fuel gas supply is improved by the temperature control of the valve of self-regulated valve group 6 and temperature thermo-coupler 8 and realizes self-regulated.Conversely, when temperature is more than 1300 DEG C, turning down the valve of self-regulated valve group 6, fuel gas supply is reduced, form the temperature control system of complete set.To maintain the temperature stabilization in pyrolysis furnace 4.Temperature control is carried out according to the temperature practical situation of 4 afterbody of pyrolysis furnace stove in production process.When stove tail temperature is less than technological requirement value, the self-regulated valve group 7 on 5 fuel gas admission line of auxiliary burner is would automatically turn on the temperature control of temperature thermo-coupler 9, realizes the self regulation of stove tail temperature.
System configuration air blower 3 is supplied gas toward in pyrolysis furnace 4, when coefficient of excess is less than 5%, opens big air stream gauge 11 by flow-control of the effusion meter 11 with air coefficient table 10, improves amount of supplied air；Conversely, when coefficient of excess is more than 20%, turning down mass air flow sensor 11, amount of supplied air is reduced, form the coefficient of excess air control system of complete set.Spray gun atomizing effect is observed by visor simultaneously, and is adjusted in time.So as to be effectively guaranteed the stability contorting of technic index in pyrolysis furnace.Obtain the qualified follow-up acid making system of sulfur dioxide gas feeding and prepare commodity sulphuric acid.
Claims (7)
1. in a kind of Waste Sulfuric Acid cracking concentrated sulphuric acid in pyrolysis furnace index control method, it is characterized in that including pyrolysis furnace temperature control system, coefficient of excess air control system, spent acid and gas mixing uniformity control system.
2. control method according to claim 1, it is characterised in that pyrolysis furnace temperature control system, is that temperature spot is arranged in pyrolysis furnace, chain with fuel gas inlet valve.
3. control method according to claim 1, it is characterised in that coefficient of excess air control system, is the setting coefficient of excess air test point after pyrolysis furnace, chain with the effusion meter of pyrolysis furnace air intlet.
4. control method according to claim 1, it is characterised in that spent acid and gas mixing uniformity control system, are that visor is arranged on pyrolysis furnace, spent acid is entered in pyrolysis furnace by ultrasonic atomization spray gun, is observed atomizing effect by visor and is adjusted.
5. control method according to claim 2, is characterized in that, when temperature is less than 900 DEG C, opening big imported valve, improving fuel gas supply；When temperature is more than 1300 DEG C, imported valve is turned down, reduce fuel gas supply, maintain stablizing for cracking in-furnace temperature.
6. control method according to claim 2, it is characterised in that when coefficient of excess is less than 5%, drive large capacity meter, improve amount of supplied air；When coefficient of excess is more than 20%, effusion meter is turned down, reduce amount of supplied air, cracking reaction stablizes in maintenance pyrolysis furnace.
7. control method according to claim 2, it is characterised in that when observing that atomizing effect is bad, then adjust the fitness of spent acid amount and spray gun, make spent acid uniformly mix with gas.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510630964.9A CN106557101A (en) | 2015-09-29 | 2015-09-29 | In Waste Sulfuric Acid cracking concentrated sulphuric acid in pyrolysis furnace index control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510630964.9A CN106557101A (en) | 2015-09-29 | 2015-09-29 | In Waste Sulfuric Acid cracking concentrated sulphuric acid in pyrolysis furnace index control method |
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| Publication Number | Publication Date |
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| CN106557101A true CN106557101A (en) | 2017-04-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3773917A (en) * | 1971-11-10 | 1973-11-20 | Texaco Inc | Recovery of used sulfuric acid alkylation catalyst |
| CN201647995U (en) * | 2010-02-26 | 2010-11-24 | 中国石油化工集团公司 | Cracking furnace of production device for preparing concentrated sulfuric acid by cracking waste sulfuric acid |
| CN203428910U (en) * | 2013-07-22 | 2014-02-12 | 江苏永纪化工设备有限公司 | Incineration furnace for waste sulfuric acid and hydrogen sulfide joint incineration acid preparation process |
| CN104828783A (en) * | 2015-06-05 | 2015-08-12 | 山东金诚重油化工技术研究院 | Method and device for increasing acidic gas treatment capacity of acidic-gas sulfuric acid making device |
-
2015
- 2015-09-29 CN CN201510630964.9A patent/CN106557101A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3773917A (en) * | 1971-11-10 | 1973-11-20 | Texaco Inc | Recovery of used sulfuric acid alkylation catalyst |
| CN201647995U (en) * | 2010-02-26 | 2010-11-24 | 中国石油化工集团公司 | Cracking furnace of production device for preparing concentrated sulfuric acid by cracking waste sulfuric acid |
| CN203428910U (en) * | 2013-07-22 | 2014-02-12 | 江苏永纪化工设备有限公司 | Incineration furnace for waste sulfuric acid and hydrogen sulfide joint incineration acid preparation process |
| CN104828783A (en) * | 2015-06-05 | 2015-08-12 | 山东金诚重油化工技术研究院 | Method and device for increasing acidic gas treatment capacity of acidic-gas sulfuric acid making device |
Non-Patent Citations (2)
| Title |
|---|
| 包温姬: "浅谈废硫酸高温裂解", 《工程技术》 * |
| 陈新: "可资源化烷基化废酸裂解装置若干问题分析与探讨", 《硫酸工业》 * |
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