CN113294994A - Desulfurization emission reduction device of preheater - Google Patents
Desulfurization emission reduction device of preheater Download PDFInfo
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- CN113294994A CN113294994A CN202110588116.1A CN202110588116A CN113294994A CN 113294994 A CN113294994 A CN 113294994A CN 202110588116 A CN202110588116 A CN 202110588116A CN 113294994 A CN113294994 A CN 113294994A
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- Prior art keywords
- preheater
- level preheater
- pipeline
- desulfurization
- inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Furnace Details (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention relates to the technical field of desulfurization emission reduction, in particular to a preheater desulfurization emission reduction device, which comprises a decomposing furnace connected with a rotary kiln, and is technically characterized in that: the system also comprises a C5-grade preheater, an intermediate pipeline, a C4-grade preheater, a C3-grade preheater, a C2-grade preheater, a C1-grade preheater, a feeding hole, an SP boiler, a desulfurization pipe and a high-temperature fan. The device has a simple structure, saves the cost, can effectively recover sulfur dioxide gas generated in cement production, and has better effect.
Description
Technical Field
The invention relates to the technical field of desulfurization and emission reduction, in particular to a desulfurization and emission reduction device of a preheater.
Background
In the production and processing of cement, sulfur is brought in by raw meal, the sulfur usually exists in the form of compounds in the raw meal, sulfur dioxide gas is generated when clinker is formed by high-temperature calcination in a rotary kiln, and the emission of sulfur dioxide required by the environmental protection department is lower than 200mg/m3If the normal discharge can not meet the requirements of environmental protection departments, the atmospheric environment can be seriously polluted, and the prior desulfurization method is to mix the purchased desulfurizing agents such as CaO and the like with the raw mealThe sulfur is removed by feeding the raw material into a preheater through a lifter, but the cost of the method is high.
The invention discloses a cement self-desulfurization device and a cement self-desulfurization method, which is invented by the invention with the application number of '201910412782.2', and particularly provides a device and a method for improving the desulfurization efficiency of cement production by adding a flue gas extraction pipeline in the existing cement kiln tail system, but the flue gas extraction pipeline is vertically arranged and has a longer length, and a water spray device is arranged in the pipeline, so that the temperature in the flue gas pipeline is reduced, and the desulfurization effect is poor.
Disclosure of Invention
The invention aims to provide a desulfurization and emission reduction device for a preheater, which is simple in structure, not only saves cost, but also can effectively recover sulfur dioxide gas generated in cement production, and has better effect.
In order to achieve the purpose, the invention adopts the technical scheme that:
preheater desulfurization emission reduction device includes the dore furnace of being connected with the rotary kiln, the entry of the bottom entry of dore furnace through the entry of middle pipe connection rotary kiln, its technical essential is: the top outlet of the decomposing furnace is connected with an inlet of a C5-level preheater through a pipeline, a discharge port of the C5-level preheater is connected with an intermediate pipeline through a pipeline, an air outlet of the C5-level preheater is connected with an inlet of a C4-level preheater through a pipeline, a discharge port of the C4-level preheater is connected with a bottom inlet of the decomposing furnace through a pipeline, an air outlet of the C4-level preheater is connected with an inlet of a C3-level preheater through a pipeline, a discharge port of the C3-level preheater is connected with an inlet of a C4-level preheater through a pipeline, an air outlet of the C3-level preheater is connected with an inlet of a C2-level preheater through a pipeline, an air outlet of the C2-level preheater is connected with an inlet of a C3-level preheater through a pipeline, an air outlet of the C2-level preheater is connected with an inlet of a C1-level preheater through a pipeline, a feed inlet is arranged on a pipeline connected between an air outlet of the C2-level preheater and an inlet of the C1-level preheater, the discharge gate of C1 level preheater has the entry of C2 level preheater through the pipe connection, the air outlet of C1 level preheater has the entry of SP boiler through the pipe connection, the pipeline of arranging between dore furnace and the C5 level preheater passes through the pipeline of arranging between desulfurization union coupling C1 level preheater and the SP boiler, the export of SP boiler has high temperature blower through the pipe connection.
According to the preheater desulfurization emission reduction device, the desulfurization pipe is horizontally arranged and is close to the inlet of the SP boiler, the length of the desulfurization pipe is no more than three meters, the desulfurization pipe is further provided with the plate valve, and the inner surface of the desulfurization pipe is provided with the castable layer.
In the preheater desulfurization emission reduction device, the SP boiler is also provided with a discharge hole.
The invention has the beneficial effects that:
1, sequentially connecting a C1-grade preheater, a C2-grade preheater, a C3-grade preheater, a C4-grade preheater, a decomposing furnace, a C5-grade preheater and a rotary kiln, preheating cement raw materials to 900 ℃ by sequentially passing through the C1-grade preheater, the C2-grade preheater, the C3-grade preheater and the C4-grade preheater, then feeding the cement raw materials into the decomposing furnace, decomposing the cement raw materials in the decomposing furnace to generate hot raw materials with calcium oxide as a main component, and then feeding the hot raw materials into the rotary kiln by the C5-grade preheater to calcine the cement raw materials to generate cement clinker; the rotary kiln, the decomposing furnace, the C5-stage preheater, the C4-stage preheater, the C3-stage preheater, the C2-stage preheater, the C1-stage preheater, the sP boiler and the high-temperature fan are sequentially connected, and the high-temperature fan provides power for hot air, so that the hot air in the rotary kiln sequentially passes through the decomposing furnace, the C5-stage preheater, the C4-stage preheater, the C3-stage preheater, the C2-stage preheater and the C1-stage preheater and enters the SP boiler; by additionally arranging the desulphurization pipe between the top outlet of the decomposing furnace and the inlet of the SP boiler, arranging a plate valve on the desulphurization pipe to control the opening, controlling the flow of hot air, opening the plate valve, the negative pressure at the inlet of the SP boiler is far higher than the outlet of the decomposing furnace, hot air drives uncooled hot raw materials containing calcium oxide into the SP boiler, the calcium oxide has the advantages of high reaction activity, developed particle internal pore structure, large specific surface area and the like, the reaction rate with sulfur dioxide is high, the sulfur dioxide gas is quickly and effectively treated, the clinker calcination quality is improved, the system crusting is reduced, the serious pollution to the atmosphere caused by excessive discharge of the sulfur dioxide gas is avoided, the hot raw material is selected as the desulfurizing agent, the production cost is not increased, the sulfur removal cost is greatly reduced, and the desulfurization pipe is horizontally arranged, the length design is reasonable, the internal reaction of the boiler can not be cooled, and the absorption effect of sulfur dioxide is better.
2. The high-temperature flue gas in the decomposing furnace directly enters the SP boiler, the temperature of the flue gas and the air is raised, the gas production rate of the boiler is increased, the generated energy of the steam turbine generator unit is improved, the emission of sulfur dioxide is reduced, the total production cost is reduced, and the method has good environmental benefit and social benefit and meets the requirement of developing circular economy.
And 3, the SP boiler is also provided with a discharge port, and the calcium oxide material reacted with the sulfur dioxide is discharged from the discharge port of the SP boiler and collected, and can be conveyed to a storage chute and enter a raw material homogenizing warehouse for reuse.
4. The pouring material layer is additionally arranged on the inner surface of the desulfurization pipe, the high-strength anti-explosion pouring material is adopted, the desulfurization pipe has good heat preservation and corrosion resistance, raw material dust flows in the desulfurization pipe, the flow rate of the raw material dust is high in the negative-pressure working environment, the pouring material layer plays a role in protecting the desulfurization pipe, the desulfurization pipe is prevented from being damaged by excessive scouring, and the service life of the desulfurization pipe is prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a desulfurization tube structure.
In the figure: 1, a C1-stage preheater, 2, a C3-stage preheater, 3-plate valves, 4-desulfurization pipes, 5, an SP boiler, 6-high-temperature fans, 7, a C5-stage preheater, 8-intermediate pipelines, 9-rotary kiln, 10-decomposing furnace, 11, a C4-stage preheater, 12, a C2-stage preheater, 13-feeding port and 14-pouring material layer.
Detailed Description
The technical solution of the present invention is further explained by the following specific embodiments with reference to the accompanying drawings.
As shown in fig. 1-2, the preheater desulfurization emission reduction device comprises a decomposing furnace 10 connected with a rotary kiln 9, wherein a bottom end inlet of the decomposing furnace 10 is connected with an inlet of the rotary kiln 9 through an intermediate pipeline 8.
Wherein, the top outlet of decomposing furnace 10 has the entry of C5 level preheater 7 through the pipe connection, the discharge gate of C5 level preheater 7 passes through the pipeline and is connected with middle pipeline 8, the air outlet of C5 level preheater 7 has the entry of C4 level preheater 11 through the pipe connection, the discharge gate of C4 level preheater 11 has the bottom entry of decomposing furnace 10 through the pipe connection, the air outlet of C4 level preheater 11 has the entry of C3 level preheater 2 through the pipe connection, the discharge gate of C3 level preheater 2 has the entry of C4 level preheater 11 through the pipe connection, the air outlet of C3 level preheater 2 has the entry of C2 level preheater 12 through the pipe connection, the discharge gate of C2 level preheater 12 has the entry of C3 level preheater 2 through the pipe connection, the air outlet of C2 level preheater 12 has the entry of C1 level preheater 1 through the pipe connection, the utility model discloses a desulfurization device for coal gasifier, including C2 level preheater 12, C1 level preheater 1, inlet 13 has been arranged on the pipeline of being connected between the air outlet of C2 level preheater 12 and the entry of C1 level preheater 1, the discharge gate of C1 level preheater 1 has the entry of C2 level preheater 12 through the pipe connection, the air outlet of C1 level preheater 1 has the entry of SP boiler 5 through the pipe connection, the pipeline of arranging between C1 level preheater 1 and the SP boiler 5 is connected through desulfurization pipe 4 to the pipeline of arranging between dore furnace 10 and the C5 level preheater 7, the export of SP boiler 5 has high temperature blower 6 through the pipe connection.
In the embodiment, the desulfurization pipe 4 is horizontally arranged and close to the inlet of the SP boiler 5, the length of the desulfurization pipe 4 is no more than three meters, the outer diameter of the desulfurization pipe 4 is 800mm, the desulfurization pipe 4 is also provided with a plate valve 3, and the inner surface of the desulfurization pipe is provided with a castable layer 14. The SP boiler 5 is also provided with a discharge hole.
The working principle is as follows:
when the plate valve 3 is opened, the trend of the materials is as follows: feed port 13 → stage preheater 1 of C1 → stage preheater 12 of C2 → stage preheater 2 of C3 → stage preheater 11 of C4 → decomposing furnace 10 → stage preheater 7 of C5 → rotary kiln 9 and feed port 13 → stage preheater 1 of C1 → stage preheater 12 of C2 → stage preheater 2 of C3 → stage preheater 11 of C4 → decomposing furnace 10 → SP boiler 5;
the hot air trend is as follows: rotary kiln 9 → decomposing furnace 10 → stage preheater 7 of C5 → stage preheater 11 of C4 → stage preheater 2 of C3 → stage preheater 12 of C2 → stage preheater 1 of C1 → SP boiler 5 → high temperature fan 6 and rotary kiln 9 → decomposing furnace 10 → SP boiler 5 → high temperature fan 6; the hot air and hot raw meal directly entering the SP boiler 5 from the decomposing furnace 10 can accelerate the reaction of calcium oxide in the hot raw meal and sulfur dioxide gas, and remove the sulfur dioxide gas generated in the cement clinker production process.
The 5000t/d clinker production line adopting the preheater desulfurization emission reduction device has the desulfurization efficiency and the hourly generated energy shown in the table I under different opening degrees of the plate valve 3.
Watch 1
As can be seen from the table I, as the opening degree of the plate valve 3 is increased, the desulfurization efficiency is increased from 30.74% to 71.86%, and the hourly power generation is increased from 8510kwh to 10600kwh, so that the desulfurization effect of the desulfurization pipes 4 arranged near the inlet of the SP boiler 5 and the corresponding outlet of the decomposing furnace 10 is controllable.
When the opening of the plate valve 3 is 50%, the desulfurization efficiency reaches 71.86%, but the temperature of the inlet of the SP boiler 5 reaches 381 ℃, the hour power generation amount is 10600kwh and exceeds 10% of 9000kwh of the rated power generation amount of the turbo generator unit, so that the safe operation of the turbo generator unit is influenced, the optimal opening of the plate valve 3 is 40%, the desulfurization efficiency is 67.73%, and the hour power generation amount of the turbo generator unit is 9820kwh, so that the sulfur dioxide emission requirement of the environmental protection department is met, and the power generation amount of the turbo generator unit is improved under the condition that the rated power generation amount of the turbo generator unit is not exceeded.
Claims (3)
1. Preheater desulfurization emission reduction device, including the dore furnace of being connected with the rotary kiln, the entry of rotary kiln is connected through the intermediate line to the bottom entry of dore furnace, its characterized in that: the top outlet of the decomposing furnace is connected with an inlet of a C5-level preheater through a pipeline, a discharge port of the C5-level preheater is connected with an intermediate pipeline through a pipeline, an air outlet of the C5-level preheater is connected with an inlet of a C4-level preheater through a pipeline, a discharge port of the C4-level preheater is connected with a bottom inlet of the decomposing furnace through a pipeline, an air outlet of the C4-level preheater is connected with an inlet of a C3-level preheater through a pipeline, a discharge port of the C3-level preheater is connected with an inlet of a C4-level preheater through a pipeline, an air outlet of the C3-level preheater is connected with an inlet of a C2-level preheater through a pipeline, an air outlet of the C2-level preheater is connected with an inlet of a C3-level preheater through a pipeline, an air outlet of the C2-level preheater is connected with an inlet of a C1-level preheater through a pipeline, a feed inlet is arranged on a pipeline connected between an air outlet of the C2-level preheater and an inlet of the C1-level preheater, the discharge gate of C1 level preheater has the entry of C2 level preheater through the pipe connection, the air outlet of C1 level preheater has the entry of SP boiler through the pipe connection, the pipeline of arranging between dore furnace and the C5 level preheater passes through the pipeline of arranging between desulfurization union coupling C1 level preheater and the SP boiler, the export of SP boiler has high temperature blower through the pipe connection.
2. A preheater desulfurization abatement device of claim 1, wherein: the desulfurization pipe is horizontally arranged and close to the inlet of the SP boiler, the length of the desulfurization pipe is no more than three meters, a plate valve is further arranged on the desulfurization pipe, and a pouring material layer is arranged on the inner surface of the desulfurization pipe.
3. A preheater desulfurization abatement device of claim 1, wherein: the SP boiler is also provided with a discharge hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588116.1A CN113294994A (en) | 2021-05-27 | 2021-05-27 | Desulfurization emission reduction device of preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588116.1A CN113294994A (en) | 2021-05-27 | 2021-05-27 | Desulfurization emission reduction device of preheater |
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| Publication Number | Publication Date |
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| CN113294994A true CN113294994A (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110588116.1A Withdrawn CN113294994A (en) | 2021-05-27 | 2021-05-27 | Desulfurization emission reduction device of preheater |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10118448A (en) * | 1996-10-18 | 1998-05-12 | Sumitomo Heavy Ind Ltd | Method and apparatus for desulfurization, denitration and dust collection from flue gas |
| JP2005098673A (en) * | 2003-09-05 | 2005-04-14 | Idemitsu Kosan Co Ltd | Method of removing sulfur in fluid bed device and desulfurizing agent |
| CN210631915U (en) * | 2019-05-24 | 2020-05-29 | 上海蓝霞环保工程有限公司 | Cement kiln desulfurization system |
| CN211328914U (en) * | 2019-09-02 | 2020-08-25 | 重庆德尔信工贸有限公司 | Composite catalytic desulfurization system |
| CN211514068U (en) * | 2019-12-03 | 2020-09-18 | 西南科技大学 | High-efficient desulfurization system of hot raw material of cement kiln flue gas |
| CN112546826A (en) * | 2020-02-28 | 2021-03-26 | 天瑞集团南召水泥有限公司 | Desulfurization device and method for rotary cement kiln system |
-
2021
- 2021-05-27 CN CN202110588116.1A patent/CN113294994A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10118448A (en) * | 1996-10-18 | 1998-05-12 | Sumitomo Heavy Ind Ltd | Method and apparatus for desulfurization, denitration and dust collection from flue gas |
| JP2005098673A (en) * | 2003-09-05 | 2005-04-14 | Idemitsu Kosan Co Ltd | Method of removing sulfur in fluid bed device and desulfurizing agent |
| CN210631915U (en) * | 2019-05-24 | 2020-05-29 | 上海蓝霞环保工程有限公司 | Cement kiln desulfurization system |
| CN211328914U (en) * | 2019-09-02 | 2020-08-25 | 重庆德尔信工贸有限公司 | Composite catalytic desulfurization system |
| CN211514068U (en) * | 2019-12-03 | 2020-09-18 | 西南科技大学 | High-efficient desulfurization system of hot raw material of cement kiln flue gas |
| CN112546826A (en) * | 2020-02-28 | 2021-03-26 | 天瑞集团南召水泥有限公司 | Desulfurization device and method for rotary cement kiln system |
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Application publication date: 20210824 |
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