CN113790589A - Process and device for realizing energy-saving and efficient drying of carbide slag - Google Patents
Process and device for realizing energy-saving and efficient drying of carbide slag Download PDFInfo
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- CN113790589A CN113790589A CN202111104283.0A CN202111104283A CN113790589A CN 113790589 A CN113790589 A CN 113790589A CN 202111104283 A CN202111104283 A CN 202111104283A CN 113790589 A CN113790589 A CN 113790589A
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- Prior art keywords
- furnace
- hot
- pipe
- air
- carbide slag
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
- F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
- F26B11/16—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a vertical or steeply-inclined plane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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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)
- Processing Of Solid Wastes (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The utility model provides a realize energy-conserving high-efficient dry technology of carbide slag and device, includes preheater (1), hot-blast main (2), hot-blast furnace (3), stove air intake pipe (3I), stove air outlet pipe (3 II), carbide stove tail gas import pipe (3 III), stove air intake pipe (3 IV), helical fin (3V), hot-blast furnace outlet pipe (4), cecum (5), hot-blast main (6), carbide slag import (7), stoving-breaker (8), dry powder conveyer pipe (9), cyclone (10), dry powder storehouse (11). The invention has the following advantages: the hot blast stove (3) is added in the process, so that the drying efficiency is improved, and the tail gas of the calcium carbide furnace is recycled; the preheater 1 can recycle waste heat generated in chemical production. The upper and lower folding fins or spiral fins 3 (V) are arranged in the gap of the hot blast stove 3, so that the heat exchange area of the gap between the stoves is increased, and the air preheating efficiency is improved.
Description
Technical Field
The invention relates to the technical field of material drying, in particular to a process and a device for realizing energy-saving and efficient drying of carbide slag.
Background
Carbide slag belongs to general industrial solid wastes of class II and has dangerousness, and the existing treatment method mainly comprises landfill, production of building materials (such as cement) and the like. In the process of producing building materials, the carbide slag needs to be dried and crushed, the common method is to introduce the dust-containing tail gas of the rotary kiln into the drying and crushing process, but the heat of the dust-containing tail gas cannot meet the drying requirement of the carbide slag. On the other hand, the tail gas of the calcium carbide furnace contains a large amount of combustible gases including CO and H2、CH4And the combustion of these gases can release a large amount of heat energy and exit the furnace with the resulting high temperature gases. If not utilized, energy loss and waste are caused. Based on the technology, in order to realize the efficient drying of the carbide slag and the resource utilization of the tail gas of the carbide furnace, the invention introduces the high-temperature gas generated after the combustion of the tail gas of the carbide furnace into the links of drying and crushing the carbide slag, and develops the technology and the device for realizing the energy-saving and efficient drying of the carbide slag.
Disclosure of Invention
The invention provides an energy-saving and efficient carbide slag drying process and device, and simultaneously realizes full drying of carbide slag and resource utilization of carbide furnace tail gas.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a realize energy-conserving high-efficient dry technology of carbide slag and device, the device includes pre-heater (1), hot-blast main (2), hot-blast furnace (3), stove air intake pipe (3I), stove air outlet pipe (3 II), carbide stove tail gas import pipe (3 III), stove air intake pipe (3 IV), helical fin (3V), hot-blast furnace outlet pipe (4), cecum (5), hot-blast main (6), carbide slag import (7), stoving-breaker (8), dry powder conveyer pipe (9), cyclone (10), dry powder storehouse (11). The dust-containing gas enters the preheater (1) through a pipeline, and the preheater (1) is connected with an outlet pipe (4) of the hot blast stove and a cecum (5) through a hot blast pipe (2). In the hot blast stove (3), air is connected with a gap between the outer wall of the stove and the inner wall of the stove through an air inlet (3I) between the stoves, spiral fins (3V) are arranged in the gap, the outer wall of the stove is connected with an air outlet pipe (3 II) between the stoves, and the air outlet pipe (3 II) between the stoves is connected with an air inlet (3 IV) in the stove. The tail gas inlet pipe (3 III) and the air inlet (3 IV) in the calcium carbide furnace are positioned at the bottom of the calcium carbide furnace (3). The hot-blast stove (3) is respectively connected with a hot-blast stove outlet pipe (4) and the cecum (5), and the hot-blast stove outlet pipe (4), the cecum (5) and the hot-blast pipe (6) are connected. The hot air pipe (6) and the carbide slag inlet (7) are both connected with a drying-crushing machine (8). The drying-crushing machine (8) is connected with a dry powder conveying pipe (9), the dry powder conveying pipe (9) is connected with a cyclone separator (10), and dry powder separated by the cyclone separator (10) enters a dry powder warehouse (11).
Compared with the existing carbide slag drying process and device, the invention has the following advantages.
1. According to the process and the device for realizing energy-saving and efficient drying of the calcium carbide slag, the hot blast stove (3) is added in the process, and the hot blast stove supplies heat source for the drying-crushing machine by burning the tail gas of the calcium carbide furnace, so that the drying efficiency is improved, and the tail gas of the calcium carbide furnace is recycled.
2. The invention relates to a process and a device for realizing energy-saving and efficient drying of carbide slag, wherein a preheater 1 is formed by combining a preheater and a cyclone separator, so that waste heat generated in chemical production can be recycled, and the aim of separating and preheating dust-containing gas can be fulfilled at the same time.
3. According to the process and the device for realizing energy-saving and efficient drying of the carbide slag, air is preheated in a gap between the inner wall and the outer wall of the hot blast stove (3), and the upper folding fin or the lower folding fin or the spiral fin (3V) is arranged in the gap, so that the heat exchange area of the gap between the stoves is increased, and the air preheating efficiency is improved.
4. According to the process and the device for realizing energy-saving and efficient drying of the carbide slag, the hot blast stove outlet pipe (4) is additionally arranged on the basis of the caecum (5) at the outlet of the original hot blast stove, so that dust in dust-containing gas is prevented from falling into the hot blast stove through the caecum (5).
Drawings
FIG. 1 is a process flow diagram of a process and a device for realizing energy-saving and efficient drying of carbide slag.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "top", "bottom", "outside", "inside", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in figure 1, the invention discloses a process and a device for realizing energy-saving and efficient drying of carbide slag, and the process and the device comprise a preheater (1), a hot air pipe (2), a hot air furnace (3), an inter-furnace air inlet pipe (3I), an inter-furnace air outlet pipe (3 II), a carbide furnace tail gas inlet pipe (3 III), an in-furnace air inlet pipe (3 IV), a spiral fin (3V), an hot air furnace outlet pipe (4), a cecum (5), a hot air pipe (6), a carbide slag inlet (7), a drying-crushing machine (8), a dry powder conveying pipe (9), a cyclone separator (10) and a dry powder warehouse (11).
The process unit is used for introducing dust-containing gas into a preheater (1) through a pipeline, wherein the preheater is composed of a cyclone separator and heat transfer equipment. The preheater (1) is connected with the hot blast stove (3) through the hot blast pipe (2) to supplement the shortage of heat. In the hot blast stove (3), air is connected with a gap between the outer wall of the stove and the inner wall of the stove through an air inlet (3I) between the stoves to preheat normal temperature air, in order to increase the heat exchange area, a spiral fin (3V) is arranged in the gap, the outer wall of the stove is connected with an air outlet pipe (3 II) between the stoves, and the air outlet pipe (3 II) between the stoves is respectively connected with a tail gas inlet (3 III) of the calcium carbide stove and an air inlet (3 IV) in the stove. The hot-blast stove (3) is respectively connected with a hot-blast stove outlet pipe (4) and the cecum (5), and the hot-blast stove outlet pipe (4), the cecum (5) and the hot-blast pipe (6) are connected. The hot air pipe (6) and the carbide slag inlet (7) are connected with a drying-crushing machine (8). The drying crusher (8) is connected with a dry powder conveying pipe (9), the dry powder conveying pipe (9) is connected with a cyclone separator (10), and dry powder separated by the cyclone separator (10) enters a dry powder warehouse (11).
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A process and a device for realizing energy-saving and efficient drying of carbide slag comprise a preheater (1), a hot air pipe (2), a hot air furnace (3), an air inlet (3I) between furnaces, an air outlet pipe (3 II) between furnaces, a tail gas inlet pipe (3 III) of the carbide furnace, an air inlet pipe (3 IV) in the furnace, a spiral fin (3V), an outlet pipe (4) of the hot air furnace, a cecum (5), a hot air pipe (6), an carbide slag inlet (7), a drying-crushing machine (8), a dry powder conveying pipe (9), a cyclone separator (10) and a dry powder warehouse (11), and are characterized in that dust-containing gas enters the preheater (1) through a pipeline, the preheater (1) is connected with the hot air furnace (3) through the hot air pipe (2), in the hot air furnace (3), air is connected with a gap between the outer wall of the furnace and the inner wall of the furnace through the air inlet (3I) between furnaces, the spiral fins (3V) are arranged in the gap, the outer wall of the furnace is connected with an inter-furnace air outlet pipe (3 II), the inter-furnace air outlet pipe (3 II) is respectively connected with a calcium carbide furnace tail gas inlet (3 III) and a furnace air inlet (3 IV), the hot blast furnace (3) is respectively connected with a hot blast furnace outlet pipe (4) and a cecum (5), the hot blast furnace outlet pipe (4), the cecum (5) and a hot blast pipe (6) are connected, the hot blast pipe (6) and the carbide slag inlet (7) are both connected with a drying-crushing machine (8), the drying-crushing machine (8) is connected with a dry powder conveying pipe (9), the dry powder conveying pipe (9) is connected with a cyclone separator (10), and dry powder separated by the cyclone separator (10) enters a dry powder warehouse (11).
2. The process and the device for realizing the energy-saving and high-efficiency drying of the carbide slag as claimed in claim 1 are characterized in that the hot blast stove (3) can be connected in parallel by a single preheater or a plurality of preheaters.
3. The process and the device for realizing the energy-saving and high-efficiency drying of the carbide slag according to claim 1 are characterized in that air is preheated in a gap between the inner wall and the outer wall of the hot blast stove (3), and an upper folding fin or a lower folding fin or a spiral fin (3V) is arranged in the gap.
4. The process and the device for realizing the energy-saving and efficient drying of the carbide slag according to claim 1 are characterized in that the original cecum (5) is changed into an outlet pipe 4 of a hot blast stove with three 90-degree elbows.
5. The process and the device for realizing the energy-saving and efficient drying of the carbide slag according to claim 1 are characterized in that a blast cap used by a tail gas inlet (3 III) of the carbide furnace can be a plane porous blast cap or a blast cap used by a fluidized bed gasification furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111104283.0A CN113790589A (en) | 2021-09-22 | 2021-09-22 | Process and device for realizing energy-saving and efficient drying of carbide slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111104283.0A CN113790589A (en) | 2021-09-22 | 2021-09-22 | Process and device for realizing energy-saving and efficient drying of carbide slag |
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| Publication Number | Publication Date |
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| CN113790589A true CN113790589A (en) | 2021-12-14 |
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| CN202111104283.0A Pending CN113790589A (en) | 2021-09-22 | 2021-09-22 | Process and device for realizing energy-saving and efficient drying of carbide slag |
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| CN108114589A (en) * | 2018-02-07 | 2018-06-05 | 福建龙净脱硫脱硝工程有限公司 | A kind of system and method for calcining flue gas desulfurization and dedusting auxiliary drying carbide slag |
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| CN207850029U (en) * | 2018-02-01 | 2018-09-11 | 广东世纪青山镍业有限公司 | A kind of pretreatment system of laterite |
| CN210346365U (en) * | 2019-06-13 | 2020-04-17 | 扬州一川镍业有限公司 | Rotary kiln high temperature flue gas recycle device |
| CN111589176A (en) * | 2020-05-28 | 2020-08-28 | 中国石油化工股份有限公司 | Semi-circulating FCC catalyst spray drying system |
-
2021
- 2021-09-22 CN CN202111104283.0A patent/CN113790589A/en active Pending
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| TW200944493A (en) * | 2008-03-10 | 2009-11-01 | Taiheiyo Cement Corp | Cement manufacturing method |
| DE102009055942A1 (en) * | 2009-11-26 | 2011-06-01 | Chemisch-Thermische Prozesstechnik Gmbh | Process and apparatus for purifying exhaust gases |
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Application publication date: 20211214 |