CN115046393A - Method for reducing content of nitrogen oxides in charging process of sleeve kiln - Google Patents
Method for reducing content of nitrogen oxides in charging process of sleeve kiln Download PDFInfo
- Publication number
- CN115046393A CN115046393A CN202210693624.0A CN202210693624A CN115046393A CN 115046393 A CN115046393 A CN 115046393A CN 202210693624 A CN202210693624 A CN 202210693624A CN 115046393 A CN115046393 A CN 115046393A
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- China
- Prior art keywords
- kiln
- material cup
- reduced
- sleeve
- sleeve kiln
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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
- F27D3/00—Charging; Discharging; Manipulation of charge
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
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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
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
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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
- F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
- F27D2007/063—Special atmospheres, e.g. high pressure atmospheres
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention belongs to the technical field of lime sleeve kilns, and discloses a method for reducing the content of nitrogen oxides in the feeding process of a sleeve kiln, which is based on controlling the operation time sequence of a middle bin and a material cup in the feeding process of the sleeve kiln; the method comprises the following steps: the feeding trolley of the sleeve kiln is lifted for 64 seconds, and then the intermediate bin gate is opened, so that the waiting time of the intermediate bin gate is reduced, and the redundant air entering the kiln is reduced; the material cup receives the raw materials poured into the feeding trolley and then is closed in place, a bucket of raw materials is kept in the material cup, the material cup is sealed for material storage, and air is reduced to enter the kiln; when the feeding trolley moves upwards again for 35 seconds, opening a material cup; and (4) circularly controlling according to the line number steps until the loading operation is finished. According to the method for reducing the content of the nitrogen oxide in the charging process of the sleeve kiln, the matching time sequence of the intermediate bin and the material cup is controlled in the charging process, so that the content of oxygen entering the sleeve kiln is reduced, and the converted content of the nitrogen oxide is reduced.
Description
Technical Field
The invention relates to the technical field of lime sleeve kilns, in particular to a method for reducing the content of nitrogen oxides in the feeding process of a sleeve kiln.
Background
In cooperation with environmental protection monitoring, the lime sleeve kiln increases the monitoring of the emission of nitrogen oxides and sulfur dioxide on the basis of the monitoring of the dust amount of waste gas. When the sleeve kiln is used for periodic feeding, the data of nitrogen oxides in the feeding process easily exceed the standard, so that production stoppage and stopping and lime imbalance are caused.
Disclosure of Invention
The invention provides a method for reducing the content of nitrogen oxide in the charging process of a sleeve kiln, which solves the technical problem that the data of the nitrogen oxide exceeds the standard in the charging process of a lime sleeve kiln in the prior art.
In order to solve the technical problem, the invention provides a method for reducing the content of nitrogen oxides in the charging process of a sleeve kiln, which is based on controlling the operation time sequence of a middle bin and a material cup in the charging process of the sleeve kiln; the method comprises the following steps:
the feeding trolley of the sleeve kiln is moved upwards for 64 seconds, and then the intermediate bin gate is opened, so that the waiting time of the intermediate bin gate is reduced, and the redundant air is reduced from entering the kiln;
the material cup receives the raw materials poured into the feeding trolley and then is closed in place, a bucket of raw materials is kept in the material cup, the material cup is sealed for material storage, and air is reduced to enter the kiln;
when the feeding trolley moves upwards again for 35 seconds, opening a material cup;
and (5) performing cyclic control according to the steps until the feeding operation is finished.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the method for reducing the content of the nitrogen oxides in the charging process of the sleeve kiln optimizes the opening and closing time of the intermediate bin, and compared with the existing mode, the intermediate bin is opened in a delayed mode, the intermediate bin is opened after a trolley ascends for 19 seconds, the intermediate bin is opened after the trolley ascends for 64 seconds, the waiting time of a door of the intermediate bin is reduced, and redundant air enters the kiln, so that the content of the nitrogen oxides is reduced; meanwhile, the opening time of the material cup is optimized according to the loading condition, the material cup is opened after the material is poured out of the existing trolley for 5 seconds, the material cup is opened after the material is poured out of the existing trolley for 35 seconds, and the material cup is opened after the material cup is moved upwards in the second hopper of the trolley, so that one hopper of raw material is stored in the material cup, the material cup is subjected to material storage and sealing, the air entering the kiln is reduced, the oxygen content is reduced, and the conversion of nitrogen oxide is reduced; meanwhile, when the material cup is closed in place, the middle bin door is not opened, so that the matching waiting time is shortened, and the air inlet amount is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for reducing the content of nitrogen oxides in a charging process of a sleeve kiln, which is provided by the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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 application.
It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The application is described below with reference to specific embodiments in conjunction with the following drawings.
The embodiment of the application solves the technical problem that the data of the nitrogen oxide in the feeding process of the lime sleeve kiln in the prior art exceeds the standard by providing the method for reducing the content of the nitrogen oxide in the feeding process of the sleeve kiln.
For better understanding of the above technical solutions, the above technical solutions will be described in detail with reference to the drawings and specific embodiments of the present application, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.
Referring to fig. 1, the embodiment of the application provides a method for reducing the content of nitrogen oxides in a charging process of a sleeve kiln, and the operation time sequence of a middle bin and a material cup is controlled based on the charging process of the sleeve kiln; the method reduces the oxygen content entering the kiln in the charging process of the sleeve kiln, thereby reducing the probability of the overproof nitrogen oxide after the environmental protection index of the sleeve kiln is converted. The oxygen content in the kiln during the feeding process is reduced by combing the equipment switching condition and the equipment period in the sleeve kiln feeding process and utilizing the starting and stopping sequence and time of the equipment, so that the excessive nitrogen oxide after conversion is avoided.
The method specifically comprises the following steps:
the feeding trolley of the sleeve kiln is moved upwards for 64 seconds, and then the intermediate bin gate is opened, so that the waiting time of the intermediate bin gate is reduced, and the redundant air is reduced from entering the kiln;
the material cup receives the raw materials poured into the feeding trolley and then is closed in place, a bucket of raw materials is kept in the material cup, the material cup is sealed for material storage, and air is reduced to enter the kiln;
when the feeding trolley moves upwards again for 35 seconds, opening a material cup;
and (5) performing cyclic control according to the steps until the feeding operation is finished.
Optimizing according to the current situation of equipment, after the opening time of the middle bin is staggered, waiting for the dumping of the trolley when the middle bin door is opened is reduced to the greatest extent, the middle bin is opened by the trolley ascending for 19 seconds, the middle bin is opened by changing the trolley ascending for 64 seconds, the waiting time of the middle bin door is reduced, redundant air enters the kiln, meanwhile, the opening time of the material cup is optimized by decomposing according to the loading condition, the material cup is opened by the original trolley after dumping the material and then is opened for 5 seconds, the material cup is opened by changing the material cup to the trolley second bin ascending for 35 seconds, and meanwhile, when the material cup is closed in place, the middle bin door is not opened. Therefore, a bucket of raw materials can be stored in the material cup by the quicklime, the material cup is sealed for storing materials, air entering the kiln is reduced, the oxygen content is reduced, and the data fluctuation value is reduced.
Through the period during the feeding period and the carding of the switching equipment steps, the switching time and the switching sequence of the equipment are reasonably set, so that the oxygen content entering the kiln in the feeding process is reduced, and the probability of high conversion value of nitrogen oxides is reduced. According to the switching sequence and the periodic condition of the equipment, a method capable of reducing the oxygen content in the kiln during the feeding period is found, and the method has no special requirements and is simple to operate.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the method for reducing the content of the nitrogen oxides in the charging process of the sleeve kiln optimizes the opening and closing time of the intermediate bin, and compared with the existing mode, the intermediate bin is opened in a delayed mode, the intermediate bin is opened after a trolley ascends for 19 seconds, the intermediate bin is opened after the trolley ascends for 64 seconds, the waiting time of a door of the intermediate bin is reduced, and redundant air enters the kiln, so that the content of the nitrogen oxides is reduced; meanwhile, the opening time of the material cup is optimized according to the loading condition, the material cup is opened after the material is poured out of the existing trolley for 5 seconds, the material cup is opened after the material is poured out of the existing trolley for 35 seconds, and the material cup is opened after the material cup is moved upwards in the second hopper of the trolley, so that one hopper of raw material is stored in the material cup, the material cup is subjected to material storage and sealing, the air entering the kiln is reduced, the oxygen content is reduced, and the conversion of nitrogen oxide is reduced; meanwhile, when the material cup is closed in place, the middle bin door is not opened, so that the matching waiting time is shortened, and the air inlet amount is reduced.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.
In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification can be combined and combined by a person skilled in the art
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (1)
1. A method for reducing the content of nitrogen oxides in the charging process of a sleeve kiln is characterized in that the operation time sequence of a middle bin and a material cup is controlled based on the charging process of the sleeve kiln; the method comprises the following steps:
the feeding trolley of the sleeve kiln is moved upwards for 64 seconds, and then the intermediate bin gate is opened, so that the waiting time of the intermediate bin gate is reduced, and the redundant air is reduced from entering the kiln;
the material cup receives the raw materials poured into the feeding trolley and then is closed in place, a bucket of raw materials is kept in the material cup, the material cup is sealed for material storage, and air is reduced to enter the kiln;
when the feeding trolley moves upwards again for 35 seconds, opening a material cup;
and (5) performing cyclic control according to the steps until the feeding operation is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210693624.0A CN115046393A (en) | 2022-06-18 | 2022-06-18 | Method for reducing content of nitrogen oxides in charging process of sleeve kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210693624.0A CN115046393A (en) | 2022-06-18 | 2022-06-18 | Method for reducing content of nitrogen oxides in charging process of sleeve kiln |
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| CN115046393A true CN115046393A (en) | 2022-09-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490442A (en) * | 2022-09-23 | 2022-12-20 | 北京首钢股份有限公司 | Method for reducing emission of nitric oxide in sleeve lime kiln |
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2022
- 2022-06-18 CN CN202210693624.0A patent/CN115046393A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115490442A (en) * | 2022-09-23 | 2022-12-20 | 北京首钢股份有限公司 | Method for reducing emission of nitric oxide in sleeve lime kiln |
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