CN217340631U - Flue gas treatment system for preheating furnace - Google Patents
Flue gas treatment system for preheating furnace Download PDFInfo
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- CN217340631U CN217340631U CN202123362454.8U CN202123362454U CN217340631U CN 217340631 U CN217340631 U CN 217340631U CN 202123362454 U CN202123362454 U CN 202123362454U CN 217340631 U CN217340631 U CN 217340631U
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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
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Abstract
The utility model relates to the field of accessories of preheating furnaces, in particular to a flue gas treatment system for a preheating furnace, which comprises a negative pressure pipeline, a synchronous cooling dust removal device, a low-temperature plasma waste gas purification device and a chimney; the negative pressure pipeline is sequentially communicated with a flue gas outlet of the preheating furnace, the synchronous cooling dust removal device, the low-temperature plasma waste gas purification device and the chimney. The utility model realizes the synchronous cooling and preliminary dust removal of high-temperature flue gas by arranging the synchronous cooling dust removal device in front of the low-temperature plasma waste gas purification device, so that the high-temperature flue gas is converted into low-temperature low-concentration flue gas, thereby avoiding the irreversible damage of the high-temperature flue gas to the low-temperature plasma waste gas purification device and further improving the overall reliability of the flue gas treatment system 1 for the preheating furnace; the chimney can play the roles of drawing fire and smoke, discharging the smoke and improving the combustion condition, thereby further improving the smoke treatment efficiency of the smoke treatment system for the preheating furnace and improving the heating efficiency of the preheating furnace.
Description
Technical Field
The utility model relates to a preheater accessory technical field especially relates to a flue gas processing system for preheater.
Background
The preheating furnace is an energy-saving heating device, which can exchange heat in high-temperature flue gas of the heating furnace by low-quality fuel (mainly low-calorific-value fuel such as blast furnace gas, hot gas, tail gas and the like) or air through a heat exchanger, so as to increase the temperature of the low-quality fuel or air to 900 ℃ generally. Thereby improving the actual combustion temperature of the inferior fuel or the sensible heat of air, achieving the high-temperature calcination or other processes of the inferior fuel, and further replacing the high-quality fuel.
The fuel burning in the preheating furnace can produce a large amount of high temperature flue gas, and the flue gas needs to be handled through filtering purification to satisfy discharge to reach standard requirement, however, because high temperature flue gas temperature is higher, directly carry out filtering purification device and handle, can damage filtering purification device.
SUMMERY OF THE UTILITY MODEL
The fuel burning in the preheating furnace can produce a large amount of high temperature flue gas, and the flue gas needs to be handled through filtering purification to satisfy discharge to reach standard requirement, however, because high temperature flue gas temperature is higher, directly carry out filtering purification device and handle, can damage filtering purification device.
To the above technical problem, the utility model provides a technical scheme does:
the utility model provides a flue gas treatment system for a preheating furnace, which comprises a negative pressure pipeline, a synchronous cooling dust removal device, a low-temperature plasma waste gas purification device and a chimney; the negative pressure pipeline is sequentially communicated with a smoke outlet of the preheating furnace, the synchronous cooling dust removal device, the low-temperature plasma waste gas purification device and the chimney.
Further, the synchronous cooling dust removal device comprises a fixed shell, a movable shell, a water pump and a spraying pipeline; the fixed shell is a hollow shell with an opening at the bottom end; the negative pressure pipeline horizontally penetrates through the center of the fixed shell; the spraying pipeline comprises a water pipe, a first nozzle array and a second nozzle array; the first nozzle array and the second nozzle array are both communicated with the water pump through the water pipe; the water pump provides driving force for conveying water flow to the first nozzle array and the second nozzle array along the water pipe; the first nozzle array is fixed in an annular gap between the fixed shell and the negative pressure pipeline, surrounds the negative pressure pipeline in a surrounding manner, and is arranged in a manner that the spraying direction faces the outer wall of the negative pressure pipeline; the second nozzle array is positioned in the fixed shell and fixed on the inner top surface of the negative pressure pipeline; a sewage discharge channel is arranged at the bottom of the negative pressure pipeline; the trapway is located inside the stationary housing and is directly below the second nozzle array; the movable shell is funnel-shaped; the movable shell is vertically arranged, the large-opening end of the movable shell is rotatably covered outside the opening at the bottom end of the fixed shell, a movable sealing element is arranged in a connecting annular gap between the fixed shell and the movable shell, and a sewage discharge valve is arranged at the small-opening end of the movable shell; a water outlet is formed in the upper side wall of the movable shell; and a water discharge valve is arranged on the water outlet.
Further, the first nozzle array comprises a plurality of first nozzles; and a space is reserved between the adjacent first nozzles.
Further, the first nozzle is an atomizing nozzle.
Further, the second nozzle array comprises a plurality of second nozzles; and a space is reserved between the adjacent second nozzles.
Further, the second nozzle is a solid cone nozzle.
Further, the negative pressure pipeline comprises a negative pressure fan; the negative pressure fan is positioned between the low-temperature plasma waste gas purification device and the chimney.
The utility model has the advantages of or beneficial effect:
the utility model provides a flue gas processing system for preheater on the one hand, through set up the synchronous cooling dust collector in front of low temperature plasma exhaust gas purification device, realize the synchronous cooling and preliminary dust removal to the high temperature flue gas, make the high temperature flue gas change into low temperature low concentration flue gas, thereby avoided the irreversible damage that the high temperature flue gas led to the fact low temperature plasma exhaust gas purification device, and then improved the overall reliability of the flue gas processing system 1 for preheater; on the other hand, the chimney can play the roles of drawing fire and drawing smoke, discharging the smoke and improving the combustion condition, thereby further improving the smoke treatment efficiency of the smoke treatment system for the preheating furnace and improving the heating efficiency of the preheating furnace.
Drawings
The invention and its features, aspects and advantages will become more apparent from the following detailed description of non-limiting embodiments, which is to be read in connection with the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not intended to be drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a schematic diagram of a flue gas treatment system for a preheating furnace provided in embodiment 1;
FIG. 2 is a schematic structural diagram of the synchronous cooling dust collector provided in embodiment 1.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientation or positional relationship is based on that shown in the drawings, merely for convenience in describing the invention and simplifying the description, and does not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
The appearances of the terms first, second, and third, if any, are used for descriptive purposes only and are not intended to be limiting or imply relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solutions in the embodiments of the present invention are described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
The fuel burning in the preheating furnace can produce a large amount of high temperature flue gas, and the flue gas needs to be handled through filtering purification to satisfy discharge to reach standard requirement, however, because high temperature flue gas temperature is higher, directly carry out filtering purification device and handle, can damage filtering purification device.
In view of the above technical problems, embodiment 1 provides a flue gas treatment system 01 for a preheating furnace, as shown in fig. 1-2, including a negative pressure pipeline 1, a synchronous cooling dust removal device 2, a low-temperature plasma exhaust gas purification device 3, and a chimney 4; the negative pressure pipeline 1 is sequentially communicated with a preheating furnace flue gas outlet 001, a synchronous cooling dust removal device 2, a low-temperature plasma waste gas purification device 3 and a chimney 4.
According to the working principle of the flue gas treatment system 01 for the preheating furnace provided by the embodiment 1, high-temperature flue gas discharged from a flue gas outlet 001 of the preheating furnace is sequentially subjected to cooling and dust removing treatment by the synchronous cooling and dust removing device 2 and harmful gas purification treatment by the low-temperature plasma waste gas purification device 3 in the negative pressure pipeline 1, and is finally discharged into the atmosphere through the chimney 4.
On the one hand, the synchronous cooling and dust removal device 2 is arranged in front of the low-temperature plasma waste gas purification device 3, so that the high-temperature flue gas is synchronously cooled and preliminarily removed dust, and the high-temperature flue gas is converted into low-temperature low-concentration flue gas, so that the irreversible damage of the high-temperature flue gas to the low-temperature plasma waste gas purification device 3 is avoided, and the overall reliability of the flue gas treatment system 01 for the preheating furnace is improved; on the other hand, the chimney 4 can play the roles of drawing fire and drawing smoke, discharging the smoke and improving the combustion condition, thereby further improving the smoke treatment efficiency of the smoke treatment system 01 for the preheating furnace and improving the heating efficiency of the preheating furnace.
In order to provide a synchronous cooling and dust removing device capable of achieving the cooling and dust removing effects of high-temperature flue gas synchronously, specifically, as shown in fig. 1-2, the synchronous cooling and dust removing device 2 comprises a fixed shell 20, a movable shell 21, a water pump 22 and a spraying pipeline 23; the fixed shell 20 is a hollow shell with an opening at the bottom end; the negative pressure pipeline 1 horizontally penetrates through the center of the fixed shell 20; the spray line 23 includes a water pipe 230, a first nozzle array 231, and a second nozzle array 232; the first nozzle array 231 and the second nozzle array 232 are both communicated with the water pump 22 through a water pipe 230; the water pump 22 provides driving force for the water flow to be conveyed to the first nozzle array 231 and the second nozzle array 232 along the water pipe 230; the first nozzle array 231 is fixed in an annular gap between the fixed shell 20 and the negative pressure pipeline 1, the first nozzle array 231 surrounds the negative pressure pipeline 1 in a surrounding manner, and the spraying direction of the first nozzle array 231 faces the outer wall of the negative pressure pipeline 1; the second nozzle array 232 is located inside the fixed casing 20, and the second nozzle array 232 is fixed on the inner top surface of the negative pressure pipeline 1; a sewage discharge channel 10 is arranged at the bottom of the negative pressure pipeline 1; the trapway 10 is located inside the stationary housing 20, and the trapway 10 is located directly below the second nozzle array 232; the movable shell 20 is funnel-shaped; the movable shell 21 is vertically arranged, the large-opening end of the movable shell 21 is rotatably covered outside the opening at the bottom end of the fixed shell 20, a movable sealing element is arranged in a connecting annular gap between the fixed shell 20 and the movable shell 21, and a sewage discharge valve 210 is arranged at the small-opening end of the movable shell 21; a water outlet 211 is arranged on the upper side wall of the movable shell 21; the drain port 211 is provided with a drain valve 2110.
The synchronous cooling and dust removing principle of the synchronous cooling and dust removing device 2 is as follows:
high-temperature flue gas flows in the negative pressure pipeline 1 and flows through the fixed shell 20, the water pump 22 extracts cooling water, the cooling water passes through the water pipe 230 and is finally sprayed out by the first nozzle array 231 to spray and cool the outer surface of the negative pressure pipeline 1, and the sprayed cooling water is downwards discharged into the inner cavity of the movable shell 21. Meanwhile, the water pump 22 pumps cooling water, the cooling water passes through the water pipe 230 and is finally sprayed out by the second nozzle array 232 to directly contact and spray-cool the high-temperature flue gas in the inner cavity of the negative pressure pipeline 1, and meanwhile, dust in the high-temperature flue gas and cooling water drops settle together and are discharged downwards into the inner cavity of the movable shell 21 through the sewage discharge channel 10 at the bottom of the negative pressure pipeline 1.
The two cooling water paths are collected in the inner cavity of the movable shell 21.
The movable shell 21 rotates around the central axis thereof, the movable shell 21 is funnel-shaped, a small opening end of the movable shell is arranged downwards, under the rotating action of the movable shell 21, dust and sewage move along with the movable shell, due to the density difference between dust particles and water particles, dust can be gathered at the bottom of the movable shell 21, meanwhile, a water body close to the top is clear, namely, the movable shell 21 rotates, so that the dust and sewage are subjected to solid-liquid separation, the bottom is solid dust and slag, and clear water is arranged above the bottom.
After solid-liquid separation is realized, the drain valve 210 is opened, and solid dust and slag can be discharged.
When the level of the upper clear water is higher than the level of the water outlet 211, the water outlet valve 2110 is opened to discharge a part of the clear water, thereby preventing the water level in the movable housing 21 from being too high.
The second nozzle array 232 utilizes water drops to settle dust in the high-temperature flue gas, and the dust removal efficiency is high.
Through the solid-liquid separation of above-mentioned structure realization dust sewage, can reduce the risk that dust sewage blockked up blow off water pipe to a certain extent, improve the operational reliability that is used for the flue gas processing system 01 of preheater.
Further, as shown in fig. 2, the first nozzle array 231 includes a number of first nozzles; a space is reserved between the adjacent first nozzles.
In order to save water resources and simultaneously further improve the cooling efficiency, further, the first nozzle is an atomizing nozzle. The atomizing nozzle can spray atomized water drops, and because the diameter of the atomized water drops is smaller, on one hand, the water drops formed with the same water amount are more dispersed, which is beneficial to saving water resources; on the other hand, atomized water drops are easy to vaporize, so that more heat is absorbed, and the cooling efficiency is further improved.
Further, as shown in fig. 2, the second nozzle array 232 includes a plurality of second nozzles; and a space is reserved between the adjacent second nozzles.
Further, the second nozzle is a solid cone nozzle. The solid cone nozzle is characterized by being capable of generating solid cone spray shape, the jet flow angle is 30-120 degrees, the spraying area is circular, and the nozzle can generate spray with uniform distribution and medium to large liquid drop size under the flow rate and pressure of a large-range solid cone nozzle. The solid cone nozzle can play an excellent effect in the jet flow application field requiring to cover an area, and meanwhile, the solid cone nozzle also has excellent anti-blocking performance, so that the solid cone nozzle is particularly suitable for the use scene of the sedimentation of high-temperature smoke.
In order to provide sufficient pressure difference to promote the orderly flow of the high-temperature flue gas, further, as shown in fig. 1, the negative pressure pipeline 1 comprises a negative pressure fan 10; the negative pressure fan 10 is positioned between the low temperature plasma exhaust gas purification device 3 and the chimney 4.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structural changes made by the contents of the specification and the drawings, or the direct or indirect application in other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (7)
1. A flue gas treatment system for a preheating furnace is characterized by comprising a negative pressure pipeline, a synchronous cooling dust removal device, a low-temperature plasma waste gas purification device and a chimney;
the negative pressure pipeline is sequentially communicated with a smoke outlet of the preheating furnace, the synchronous cooling dust removal device, the low-temperature plasma waste gas purification device and the chimney.
2. The flue gas treatment system for a preheating furnace according to claim 1, wherein the synchronous cooling dust removal device comprises a fixed shell, a movable shell, a water pump and a spraying pipeline;
the fixed shell is a hollow shell with an opening at the bottom end; the negative pressure pipeline horizontally penetrates through the center of the fixed shell;
the spraying pipeline comprises a water pipe, a first nozzle array and a second nozzle array; the first nozzle array and the second nozzle array are communicated with the water pump through the water pipe; the water pump provides driving force for water flow to be conveyed to the first nozzle array and the second nozzle array along the water pipe;
the first nozzle array is fixed in an annular gap between the fixed shell and the negative pressure pipeline, the first nozzle array surrounds the negative pressure pipeline in a surrounding manner, and the spraying direction of the first nozzle array faces the outer wall of the negative pressure pipeline;
the second nozzle array is positioned in the fixed shell and fixed on the inner top surface of the negative pressure pipeline; a sewage discharge channel is arranged at the bottom of the negative pressure pipeline; the trapway is located inside the stationary housing and is directly below the second nozzle array;
the movable shell is funnel-shaped; the movable shell is vertically arranged, the large-opening end of the movable shell is rotatably covered outside the opening at the bottom end of the fixed shell, a movable sealing element is arranged in a connecting annular gap between the fixed shell and the movable shell, and a sewage discharge valve is arranged at the small-opening end of the movable shell; a water outlet is formed in the upper side wall of the movable shell; and a water discharge valve is arranged on the water outlet.
3. The flue gas treatment system for a preheater of claim 2, wherein said first nozzle array includes a plurality of first nozzles; and a space is reserved between the adjacent first nozzles.
4. The flue gas treatment system for a preheater of claim 3, wherein said first nozzle is an atomizing nozzle.
5. The flue gas treatment system for a preheater of claim 2, wherein said second nozzle array includes a plurality of second nozzles; and a space is reserved between the adjacent second nozzles.
6. The flue gas treatment system for a preheater of claim 5, wherein said second nozzle is a solid cone nozzle.
7. The flue gas treatment system for a preheating furnace of claim 2, wherein the negative pressure line comprises a negative pressure fan; the negative pressure fan is positioned between the low-temperature plasma waste gas purification device and the chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123362454.8U CN217340631U (en) | 2021-12-29 | 2021-12-29 | Flue gas treatment system for preheating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123362454.8U CN217340631U (en) | 2021-12-29 | 2021-12-29 | Flue gas treatment system for preheating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217340631U true CN217340631U (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123362454.8U Active CN217340631U (en) | 2021-12-29 | 2021-12-29 | Flue gas treatment system for preheating furnace |
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| Country | Link |
|---|---|
| CN (1) | CN217340631U (en) |
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2021
- 2021-12-29 CN CN202123362454.8U patent/CN217340631U/en active Active
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