CN115872366B - Operation method of production-stopping and operation-stopping pre-conversion system - Google Patents
Operation method of production-stopping and operation-stopping pre-conversion system Download PDFInfo
- Publication number
- CN115872366B CN115872366B CN202210935402.5A CN202210935402A CN115872366B CN 115872366 B CN115872366 B CN 115872366B CN 202210935402 A CN202210935402 A CN 202210935402A CN 115872366 B CN115872366 B CN 115872366B
- Authority
- CN
- China
- Prior art keywords
- conversion
- production
- valve
- conversion system
- fan
- 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.)
- Active
Links
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to an operation method of a pre-conversion system without stopping production and operation, which belongs to the technical field of acid production by smelting flue gas, and comprises the following steps: s1, when the smelting production load is reduced to below 80% of the normal production load, stopping the pre-conversion system; s2, fully opening a pre-conversion reflux valve, fully closing a pre-conversion air inlet valve and an air outlet valve, and reducing the rotating speed of a pre-conversion fan to 20% of the normal air quantity of the fan; s3, when the temperature of each layer of the pre-converter is reduced to below 350 ℃, opening a pre-conversion air inlet valve and an air outlet valve, closing the opening of a pre-conversion reflux valve to 60%, and improving the rotating speed of the pre-conversion fan to 40% of the normal air quantity of the fan; s4, outlet SO to be converted in advance 3 When the content is reduced to below 0.03%, the pre-conversion air inlet valve and the air outlet valve are closed, and the pre-conversion reflux valve is fully opened. The invention realizes a production stop pre-conversion system without stopping production by adjusting each related valve of the pre-conversion, ensures the operation rate of equipment and ensures the production cost.
Description
Technical Field
The invention belongs to the technical field of acid production by smelting flue gas, and particularly relates to an operation method of a pre-conversion system without stopping production and operation.
Background
Current flue gas acid making system is in order to satisfy smelting productivity and promote requirementPart of enterprises are added with a pre-conversion system on the premise of not changing the production capacity of the original acid making system. According to the normal flow, stopping the pre-conversion system to stop production on the whole line, and introducing air to blow off SO (SO) on the pre-conversion system 3 72 hours or more. The operation can affect smelting production and main conversion system heat preservation, reduce the yield of anode copper and sulfuric acid of companies, increase the cost and are not beneficial to overall production cost management and control. Accordingly, there is a need to provide a method of operating a pre-conversion system without shutdown.
The invention aims to realize the shutdown of the pre-conversion system on the premise of not influencing the main conversion and the normal production of the smelting kiln, and avoid the full-line shutdown to blow SO to the pre-conversion system 3 And the energy is wasted. When the pre-conversion system fails or the smoke quantity can only meet the main conversion production, the residual SO of the pre-conversion system is absorbed by continuously absorbing the circulation of the pump by adjusting the opening of the valve of the pre-conversion system and the rotating speed of the pre-conversion fan 3 The corrosion of condensed acid to the system is reduced, and the safety materialization continuous production requirement is met.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides an operation method of the non-stop production and operation pre-conversion system, which realizes the non-stop production and operation pre-conversion system by adjusting the valves related to the pre-conversion system, ensures the operation rate of equipment and ensures the production cost.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the operation method of the non-shutdown pre-conversion system comprises the following steps:
s1, when the smelting production load is reduced to below 80% of the normal production load, or the pre-conversion system is in fault and needs to be shut down for maintenance, the pre-conversion system needs to be shut down;
s2, the pre-conversion reflux valve is fully opened, the pre-conversion air inlet valve and the air outlet valve are fully closed, the rotating speed of the pre-conversion fan is reduced to 20% of the normal air quantity of the fan, and the pre-conversion is in a reflux state. From the energy-saving perspective and the pressure of the pre-conversion system, because the air inlet valve of the pre-conversion system is closed and the air quantity source is cut off, the residual air quantity in the system is less, and the energy consumption can be furthest saved and the pressure stability of the system can be ensured by adjusting the rotating speed of the pre-conversion fan to 20% of the normal air quantity.
S3, when the temperature of each layer of the pre-converter is reduced to below 350 ℃, opening a pre-conversion air inlet valve and an air outlet valve, closing the opening of a pre-conversion reflux valve to 60%, increasing the rotating speed of a pre-conversion fan to 40% of the normal air quantity of the fan, and blowing off SO in a pre-conversion system 3 。
S4, outlet SO to be converted in advance 3 When the content is reduced to below 0.03%, closing the pre-conversion air inlet valve and the air outlet valve, fully opening the pre-conversion reflux valve, and stopping the pre-conversion booster fan and the pre-absorption pump after the reflux state is recovered.
Preferably, a reduction of the smelting production load to below 80% of the normal production load in step S1 means that the production load is only able to meet the primary conversion production.
Preferably, SO is used in step S3 2 SO in the pre-conversion system is blown off to the flue gas 3 。
Preferably, step S3 blows off SO in the pre-conversion system 3 The time of (2) is more than or equal to 6 hours.
The principle of the invention is that when the smelting production load is reduced to below 80% of the normal production load or the pre-conversion system is in fault and needs to be shut down for maintenance, the pre-conversion system needs to be shut down to ensure the normal production of the main conversion. SO in the pre-conversion system is subjected to pre-conversion beating reflux 3 The method comprises the steps of leading most SO in a pre-absorption section according to the trend of a pre-conversion fan, pre-conversion, pre-absorption and pre-conversion fan 3 Absorbing. When the temperature of each layer of the pre-converter is reduced to below 350 ℃, the catalyst layer does not perform a catalytic reaction, the rotation speed of the valve and the fan related to the pre-conversion is adjusted again, the pre-conversion system is connected with the main conversion system, and at the moment, because the catalyst layer of the pre-conversion system can not catalyze, SO in normal production is utilized by main conversion 2 SO that cannot be absorbed by pre-absorption in a pre-conversion system 3 Performing displacement to pre-convert SO in the system 3 The content is reduced to below 0.03%, and the pre-conversion system has a shutdown condition and can avoid the formation of condensed acid corrosion equipment.
The invention has the beneficial effects that:
1. the invention can convert SO in the pre-conversion system by adjusting the rotation speeds of the pre-conversion reflux valve, the air inlet valve, the air outlet valve and the booster fan 3 Blowing off SO 3 The content is blown off to be below 0.03%, so that the pre-conversion system has a shutdown condition, the normal production of main conversion is realized, and only the pre-conversion system is stopped, thereby ensuring the normal operation of the whole production line, not influencing the normal production of the system, ensuring the operation rate of equipment and ensuring the production cost.
2. The invention has good adaptability, no need of manpower input and no need of changing the system, and can realize the shutdown of the pre-conversion system by adjusting the pre-conversion related valve, and the main conversion system is normally produced.
3. SO is blown off by the method 3 The bottom of the pre-converter has no accumulation of condensed acid, so that the corrosion of the condensed acid to the system can be avoided, and the safety and intrinsically continuous production requirement can be met.
Drawings
FIG. 1 is a process flow diagram of the present invention;
in the figure, (1) -pre-inversion air inlet valve, (2) -pre-inversion air outlet valve, (3) -pre-inversion reflux valve.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more apparent, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to facilitate understanding of the skilled person.
Examples
Because the regional limit electricity, the production load can only be maintained at about 80% of the normal production load, and because the production load is small and the limit electricity is required to stop the pre-conversion system for about 20 days, the operation method of the pre-conversion system without stopping production and stopping operation for avoiding influencing the normal production of the main conversion system specifically comprises the following steps:
s1, smelting production load is reduced to below 80% of normal production load, and at the moment, only the main conversion system can meet production requirements.
S2, the pre-conversion reflux valve is fully opened, the pre-conversion air inlet valve and the air outlet valve are fully closed, the rotating speed of the pre-conversion fan is reduced to 20% of the normal air quantity of the fan, the fan type selection problem of each unit is considered, the rotating speed of the fan is 5HZ, and the pre-conversion is in a reflux beating state. From the energy-saving perspective and the pressure of the pre-conversion system, because the air inlet valve of the pre-conversion system is closed and the air quantity source is cut off, the residual air quantity in the system is less, and the energy consumption can be saved to the greatest extent and the pressure stability of the system can be ensured by regulating the rotating speed of the pre-conversion fan to the lowest.
S3, after 8 hours, when the temperature of each layer of the pre-converter is reduced to below 350 ℃, opening a pre-conversion air inlet valve and an air outlet valve, closing the opening of a pre-conversion reflux valve to 60%, improving the rotating speed of a pre-conversion fan to 40% of the normal air quantity of the fan, and considering the fan type selection problem of each unit, wherein the rotating speed of the fan is 10HZ, and adopting main conversion SO (sulfur dioxide) 2 Flue gas blowing pre-conversion system SO 3 。
S4, after 6 hours, measuring the SO at the pre-conversion outlet 3 The content is 0.028%, the pre-conversion air inlet valve and the air outlet valve are closed, the pre-conversion reflux valve is fully opened, at the moment, the pre-conversion system resumes the reflux state, the pre-conversion fan and the pre-absorption pump are stopped, and no condensed acid is accumulated at the bottoms of the pre-converter and the heat exchanger through inspection. After the electricity limiting is released in the region, the pre-conversion system starts to heat up normally, and the production of the production smoke is started, and all indexes are normal.
The invention adjusts the rotation speed of each related valve and fan of the pre-conversion, and the SO in the pre-conversion system is converted back through pre-conversion beating 3 The method comprises the steps of leading most SO in a pre-absorption section according to the trend of a pre-conversion fan, pre-conversion, pre-absorption and pre-conversion fan 3 Absorbing. When the temperature of each layer of the pre-converter is reduced to below 350 ℃, the catalyst layer does not perform a catalytic reaction, the rotation speed of the valve and the fan related to the pre-conversion is adjusted again, the pre-conversion system is connected with the main conversion system, and at the moment, because the catalyst layer of the pre-conversion system can not catalyze, SO in normal production is utilized by main conversion 2 SO that cannot be absorbed by pre-absorption in a pre-conversion system 3 Performing displacement to pre-convert SO in the system 3 The content is reduced to below 0.03%, the pre-conversion system has a shutdown condition, and the pre-conversion system can be shut down at the moment, SO that the normal production of the main conversion system is not influenced, and the full-line shutdown is avoided to blow SO to the pre-conversion system 3 And the energy is wasted. The method has no accumulation of condensed acid at the bottoms of the converter and the heat exchanger, and can avoid forming condensed acid corrosion equipment.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (3)
1. A method of operating a non-shutdown pre-conversion system, characterized by: the operation method of the non-shutdown pre-conversion system comprises the following steps:
s1, when the smelting production load is reduced to below 80% of the normal production load, or the pre-conversion system is in fault and needs to be shut down for maintenance, the pre-conversion system needs to be shut down;
s2, fully opening a pre-conversion reflux valve, fully closing a pre-conversion air inlet valve and an air outlet valve, and reducing the rotating speed of a pre-conversion fan to 20% of the normal air quantity of the fan;
s3, when the temperature of each layer of the pre-converter is reduced to below 350 ℃, opening a pre-conversion air inlet valve and an air outlet valve, closing the opening of a pre-conversion reflux valve to 60%, and improving the rotating speed of a pre-conversion fan to 40% of the normal air quantity of the fan, wherein SO is used 2 SO in the pre-conversion system is blown off to the flue gas 3 ；
S4, outlet SO to be converted in advance 3 When the content is reduced to below 0.03%, closing the pre-conversion air inlet valve and the air outlet valve, fully opening the pre-conversion reflux valve, and stopping the pre-conversion booster fan and the pre-absorption pump after the reflux state is recovered.
2. A method of operating an on-line pre-conversion system according to claim 1, wherein: the fact that the smelting production load falls below 80% of the normal production load in step S1 means that the production load can only meet the primary conversion production.
3. A non-stop production stop according to claim 1A method of operating a pre-inversion system, characterized by: step S3 of blowing off SO in the pre-conversion system 3 The time of (2) is more than or equal to 6 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210935402.5A CN115872366B (en) | 2022-08-05 | 2022-08-05 | Operation method of production-stopping and operation-stopping pre-conversion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210935402.5A CN115872366B (en) | 2022-08-05 | 2022-08-05 | Operation method of production-stopping and operation-stopping pre-conversion system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115872366A CN115872366A (en) | 2023-03-31 |
| CN115872366B true CN115872366B (en) | 2023-09-08 |
Family
ID=85769583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210935402.5A Active CN115872366B (en) | 2022-08-05 | 2022-08-05 | Operation method of production-stopping and operation-stopping pre-conversion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115872366B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB760240A (en) * | 1953-11-02 | 1956-10-31 | Parsons C A & Co Ltd | Improvements in and relating to power control systems for gas turbines |
| CA2055848A1 (en) * | 1991-11-19 | 1993-05-20 | Gordon M. Cameron | Cooled sulphur furnace bypass system |
| CN1356258A (en) * | 2000-12-01 | 2002-07-03 | 中国石油化工股份有限公司巴陵分公司 | Process for regenerating pre-converting catalyst |
| CN103553084A (en) * | 2013-10-24 | 2014-02-05 | 石家庄凤山化工有限公司 | Method and device for treating converted gas in production of sodium nitrate |
| CN204060539U (en) * | 2014-06-16 | 2014-12-31 | 张建国 | Well mouth of oil well does not stop production Quick Connect Kit |
| CN104697172A (en) * | 2013-12-09 | 2015-06-10 | 沈阳铝镁设计研究院有限公司 | Large-scale negative-pressure short-circuit circulation system and method of heat conducting oil |
| CN107010607A (en) * | 2017-04-14 | 2017-08-04 | 双盾环境科技有限公司 | High-concentration sulfur dioxide flue gas binary can adjust pre-inversion Sulphuric acid method |
| CN207811269U (en) * | 2017-12-12 | 2018-09-04 | 中国恩菲工程技术有限公司 | A kind of metallurgical gas sulphuric acid system |
| CN108587692A (en) * | 2018-05-17 | 2018-09-28 | 安徽理工大学 | It is a kind of to realize the pre- field conduct method for becoming furnace catalyst and replacing online of purification |
| CN109954519A (en) * | 2019-03-18 | 2019-07-02 | 山西潞安矿业(集团)有限责任公司 | The not parking level-one for carrying out elevated temperature cure adds hydrogen pre-converter |
| CN209759036U (en) * | 2019-04-22 | 2019-12-10 | 攀枝花市荣昌化工有限公司 | Sulfuric acid conversion heating device |
| CN113636527A (en) * | 2021-08-12 | 2021-11-12 | 楚雄滇中有色金属有限责任公司 | Method for turning on secondary absorption concentrated acid pump without stopping production |
-
2022
- 2022-08-05 CN CN202210935402.5A patent/CN115872366B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB760240A (en) * | 1953-11-02 | 1956-10-31 | Parsons C A & Co Ltd | Improvements in and relating to power control systems for gas turbines |
| CA2055848A1 (en) * | 1991-11-19 | 1993-05-20 | Gordon M. Cameron | Cooled sulphur furnace bypass system |
| CN1356258A (en) * | 2000-12-01 | 2002-07-03 | 中国石油化工股份有限公司巴陵分公司 | Process for regenerating pre-converting catalyst |
| CN103553084A (en) * | 2013-10-24 | 2014-02-05 | 石家庄凤山化工有限公司 | Method and device for treating converted gas in production of sodium nitrate |
| CN104697172A (en) * | 2013-12-09 | 2015-06-10 | 沈阳铝镁设计研究院有限公司 | Large-scale negative-pressure short-circuit circulation system and method of heat conducting oil |
| CN204060539U (en) * | 2014-06-16 | 2014-12-31 | 张建国 | Well mouth of oil well does not stop production Quick Connect Kit |
| CN107010607A (en) * | 2017-04-14 | 2017-08-04 | 双盾环境科技有限公司 | High-concentration sulfur dioxide flue gas binary can adjust pre-inversion Sulphuric acid method |
| CN207811269U (en) * | 2017-12-12 | 2018-09-04 | 中国恩菲工程技术有限公司 | A kind of metallurgical gas sulphuric acid system |
| CN108587692A (en) * | 2018-05-17 | 2018-09-28 | 安徽理工大学 | It is a kind of to realize the pre- field conduct method for becoming furnace catalyst and replacing online of purification |
| CN109954519A (en) * | 2019-03-18 | 2019-07-02 | 山西潞安矿业(集团)有限责任公司 | The not parking level-one for carrying out elevated temperature cure adds hydrogen pre-converter |
| CN209759036U (en) * | 2019-04-22 | 2019-12-10 | 攀枝花市荣昌化工有限公司 | Sulfuric acid conversion heating device |
| CN113636527A (en) * | 2021-08-12 | 2021-11-12 | 楚雄滇中有色金属有限责任公司 | Method for turning on secondary absorption concentrated acid pump without stopping production |
Non-Patent Citations (1)
| Title |
|---|
| 铜冶炼高浓度SO_2烟气制酸转化工艺设计探讨;戚永辉;郎学云;;硫酸工业(第07期) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115872366A (en) | 2023-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114606509B (en) | Thermal management system and method for hydrogen production electrolytic cell array | |
| CN115872366B (en) | Operation method of production-stopping and operation-stopping pre-conversion system | |
| CN103508418B (en) | Go into operation gas heating system and heating means in water vapour process for making hydrogen | |
| CN113636527B (en) | Method for switching on and switching on secondary absorption concentrated acid pump without stopping production | |
| CN111536806A (en) | Water-borne flue gas waste heat utilization system with acid dew point online monitoring function | |
| CN202810977U (en) | Condensed steam back-heating type small-turbine driving rotation equipment system of thermal power plant | |
| CN214764463U (en) | Multi-parameter coupling wet desulphurization intelligent regulation and control system | |
| CN209957709U (en) | Automatic agent unloading system of catalytic cracking regenerator | |
| CN217110501U (en) | Heat dissipation device for titanium sponge production reduction process | |
| CN220824485U (en) | Phenol acetone rectifying production energy-saving system | |
| CN221144719U (en) | Efficient circulating water cooling system of air compressor | |
| CN215890405U (en) | Energy-saving and consumption-reducing control system of air compressor | |
| CN201358171Y (en) | Afterheat recovery system shared by plurality of sulfuric acid devices | |
| CN218203171U (en) | Vacuumizing device of polycrystalline silicon ingot furnace | |
| CN201521944U (en) | Waste-heat boiler off-gas control apparatus for float glass smelting kiln | |
| CN221151861U (en) | Air-water cooling device heat exchange core structure for frequency converter capable of being maintained online | |
| CN218579651U (en) | Device for adjusting inlet air temperature of one-section inlet of sulfuric acid converter | |
| CN114353541B (en) | System and method for improving operation stability of waste heat boiler of heating furnace | |
| CN221016656U (en) | Novel drag reduction device | |
| CN219083708U (en) | Air blowing system of dry section of belt type roasting machine | |
| CN214944463U (en) | Steam turbine backheating drainage system | |
| CN214426446U (en) | Heating furnace flue gas waste heat recovery system | |
| CN220817947U (en) | Powerful frequency conversion swimming pool dehumidification unit | |
| CN220657023U (en) | Desulfurization primary and secondary tower oxidation wind optimizing system | |
| CN219934681U (en) | Energy-saving pipeline structure of kiln tail humidifying tower for cement production |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |