CN212457868U - System for controlling oxygen content in flue gas hood of sintering machine - Google Patents
System for controlling oxygen content in flue gas hood of sintering machine Download PDFInfo
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- CN212457868U CN212457868U CN202021309832.9U CN202021309832U CN212457868U CN 212457868 U CN212457868 U CN 212457868U CN 202021309832 U CN202021309832 U CN 202021309832U CN 212457868 U CN212457868 U CN 212457868U
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Abstract
The utility model relates to a system and a method for controlling oxygen content in a flue gas hood of a sintering machine, which comprises a trolley, a flue gas hood arranged above the trolley, a logic controller and a computer software system, wherein a plurality of groups of air inlet adjusting pipes are arranged at the top of the flue gas hood at equal intervals, an air inlet adjusting valve is arranged at the upper end of the air inlet adjusting pipe, an oxygen meter I is arranged below each group of air inlet adjusting pipes in the flue gas hood, and an oxygen meter II is arranged below the space between the two groups of air inlet adjusting pipes in the flue gas hood; the logic controller is electrically connected with the oxygen measuring meter I, the oxygen measuring meter II and the air inlet regulating valve, and the computer software system is electrically connected with the logic controller. The advantages are that: through the main regulation control and the compensation regulation control of the regulating valve and the combination of the multi-point detection and the comprehensive analysis algorithm based on the PLC, the refined intelligent control of the oxygen content in the flue gas hood of the sintering machine is realized, the raw materials are ensured to fully react in the sintering process to obtain high-quality sintering ores, the heat loss of the circulating flue gas is reduced, and the production cost is saved.
Description
Technical Field
The utility model relates to an industrial computer real-time control technical field, concretely relates to oxygen content control system in sintering machine flue gas hood.
Background
The traditional sintering production has the characteristics of large waste gas amount, serious pollution load, various pollutants and the like, and the sintering flue gas circulation technology can well solve the problem. The flue gas circulation is a process of circularly recovering and recycling the flue gas discharged in the sintering process, and the amount of the circulating flue gas accounts for 20-30% of the total discharge amount. The technology not only reduces the total smoke discharge amount of sintering production and heat loss, but also enables the nitrogen oxides and the sulfur oxides to generate secondary chemical reaction in the smoke circulation process, converts part of harmful substances into harmless substances and reduces the discharge of the harmful substances. The flue gas hood of the sintering machine is arranged above the sintering machine trolley to form a closed space for flue gas to flow circularly, and is an important component of flue gas circulation. Under the action of the circulating fan, sintering flue gas enters the flue gas hood from the air inlet pipeline, then passes through sintering raw materials in the trolley to enter the air outlet pipeline, and finally flows back to the air inlet pipeline from part of the air outlet pipeline, so that a flue gas circulating process is completed. In the circulation process, oxygen in the flue gas continuously participates in the sintering reaction, and the environment is a closed space, so that additional air is needed for oxygen supplementation. Maintaining the stability of the oxygen content in the flue gas hood is particularly important: the low oxygen content can cause insufficient sintering reaction and influence the quality of the sintered ore; higher oxygen content reduces the temperature of the circulating flue gas, increasing heat loss and increasing production costs. Therefore, the fine control of the stability of the oxygen content in the flue gas cover is a difficult problem to be solved urgently in sintering production.
Disclosure of Invention
To the above-mentioned problem that exists among the prior art, the utility model aims to provide an oxygen content control system in sintering machine flue gas cover, this system passes through the main regulation control and the compensation regulation control of flue gas cover governing valve, combines multiple spot detection and comprehensive analysis algorithm based on PLC, realizes the intelligent control that becomes more meticulous of oxygen content in sintering machine flue gas cover, thereby this kind of control not only guarantees that sintering raw materials carries out the abundant reaction in sintering process and obtains high-quality sintering deposit, has reduced the heat loss of circulation flue gas moreover and has practiced thrift manufacturing cost.
The utility model aims at realizing through the following technical scheme:
the utility model discloses a sintering machine flue gas cover is interior to contain oxygen volume control system, including the platform truck, set up the flue gas cover above the platform truck, set up air-out pipeline, logic controller and the computer software system below the platform truck, its characterized in that, equidistant multiunit air inlet adjusting pipe that is equipped with in flue gas cover top, be equipped with air inlet adjusting valve in air inlet adjusting pipe upper end, the below of every group air inlet adjusting pipe is equipped with oxygen meter I in the flue gas cover, oxygen meter II set up the below between two sets of air inlet adjusting pipes in the flue gas cover; the logic controller is electrically connected with the oxygen measuring meter I, the oxygen measuring meter II and the air inlet regulating valve, and the computer software system is electrically connected with the logic controller;
the computer software system comprises an oxygen content main adjusting unit, an oxygen content compensation adjusting unit and an adjusting valve opening calculating unit, wherein the input end of the oxygen content main adjusting unit is connected with the output end of the logic controller, the output end of the oxygen content main adjusting unit is connected with the input end of the oxygen content compensation adjusting unit, the output end of the oxygen content compensation adjusting unit is connected with the input end of the adjusting valve opening calculating unit, and the output end of the adjusting valve opening calculating unit is connected with the input end of the logic controller.
The main oxygen content adjusting unit is used for calculating and determining an adjusting variable H of the combined adjusting valvezThe oxygen content compensation adjusting unit is used for calculating and determining parameters required by compensation adjustment; and the regulating valve opening calculating unit calculates and determines the opening value of the regulating valve.
Every two of the air inlet adjusting pipes are a group, 4-6 groups are arranged in total, and the groups are arranged at the top of the flue gas hood at equal intervals.
Compared with the prior art, the utility model has the advantages that:
the utility model discloses a main regulation control and compensation regulation control of flue gas cover governing valve combine multiple spot detection and comprehensive analysis algorithm based on PLC, realize the intelligent control that becomes more meticulous of the interior oxygen content of sintering machine flue gas cover, thereby this kind of control not only guarantees that sintering raw materials carries out the abundant reaction in sintering process and obtains high-quality sintering deposit, has reduced the heat loss of circulation flue gas moreover and has practiced thrift manufacturing cost.
Drawings
FIG. 1 is a schematic view of a control system of the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
fig. 3 is a block diagram of the computer software system of the present invention.
Detailed Description
For a clear, detailed and complete description of the present invention, reference is made to the accompanying drawings and detailed description of the invention.
As shown in fig. 1 and 2, the utility model discloses a sintering machine flue gas cover is interior to contain oxygen content control system, including platform truck 1, set up flue gas cover 2 above platform truck 1, set up the air-out pipeline, logic controller and the computer software system of platform truck below, its characterized in that, be equipped with multiunit air inlet adjusting pipe 3 at the equidistant top of flue gas cover 2, be equipped with air inlet adjusting valve 4 in air inlet adjusting pipe 3 upper end, be equipped with oxygen meter I5 below every group air inlet adjusting pipe in flue gas cover 2, be equipped with oxygen meter II 6 below between two groups air inlet adjusting pipe in flue gas cover; the logic controller is electrically connected with the oxygen measuring meter I, the oxygen measuring meter II and the air inlet regulating valve, and the computer software system is electrically connected with the logic controller;
the system comprises a trolley 1, a flue gas cover 2 arranged above the trolley 1, an air inlet adjusting pipe 3 arranged at the top of the flue gas cover 2, an air inlet adjusting valve 4 arranged at the upper end of the air inlet adjusting pipe 3 and a control system, and is characterized in that the control system is an intelligent control system and comprises an oxygen meter I5, an oxygen meter II 6, a logic controller and a computer software system, wherein the oxygen meter I5 is arranged below each group of air inlet adjusting pipes 3 in the flue gas cover 2, and the oxygen meter II 6 is arranged below a space between two groups of air inlet adjusting pipes 3 in the flue gas cover 2; the logic controller is electrically connected with the oxygen measuring meter I5, the oxygen measuring meter II 6 and the air inlet regulating valve 4, and the computer software system is electrically connected with the logic controller; every two of the air inlet adjusting pipes 3 are in one group, 6 groups are arranged, and all the groups are arranged at the top of the flue gas cover 2 at equal intervals.
As shown in fig. 3, the computer software system includes an oxygen content main adjusting unit, an oxygen content compensation adjusting unit, and an adjusting valve opening calculating unit, wherein an input end of the oxygen content main adjusting unit is connected to an output end of the logic controller, an output end of the oxygen content main adjusting unit is connected to an input end of the oxygen content compensation adjusting unit, an output end of the oxygen content compensation adjusting unit is connected to an input end of the adjusting valve opening calculating unit, and an output end of the adjusting valve opening calculating unit is connected to an input end of the logic controller.
The main oxygen content adjusting unit is used for calculating and determining an adjusting variable H of the combined adjusting valvezThe oxygen content compensation adjusting unit is used for calculating and determining parameters required by compensation adjustment; and the regulating valve opening calculating unit calculates and determines the opening value of the regulating valve.
Sintering raw materials are moved from the head part of the sintering machine to the tail part of the sintering machine by using the trolley 1 to finish the sintering process, the sintering raw materials have different characteristics in different stages of a sintering reaction, and the consumption of oxygen is in different changes in different stages. A reasonable oxygen content control is to control the oxygen content of the flue gas in each reaction stage to be above the level which can meet the requirement that the sintering raw materials in the stage can fully react, and the oxygen content of the nearby area can be respectively adjusted by the air inlet adjusting pipes 3 uniformly distributed on the flue gas hood 2. Because the pressure in the flue gas hood 2 is negative during normal production, and the external air is pumped into the flue gas hood 2 when the air inlet adjusting valve 4 is opened, the larger the opening value of the air inlet adjusting valve 4 is, the higher the oxygen content in the nearby area is, and the smaller the opening value of the air inlet adjusting valve 4 is, the lower the oxygen content in the nearby area is. Through all the adjustment of different apertures of the air inlet regulating valves 4 on the flue gas hood 1, the accurate control of the oxygen content in the whole flue gas hood 2 can be realized.
Claims (3)
1. A system for controlling oxygen content in a flue gas hood of a sintering machine comprises a trolley, a flue gas hood arranged above the trolley, an air outlet pipeline arranged below the trolley, a logic controller and a computer software system, and is characterized in that a plurality of groups of air inlet adjusting pipes are arranged at the top of the flue gas hood at equal intervals, air inlet adjusting valves are arranged at the upper ends of the air inlet adjusting pipes, an oxygen meter I is arranged below each group of air inlet adjusting pipes in the flue gas hood, and an oxygen meter II is arranged below the space between the two groups of air inlet adjusting pipes in the flue gas hood; the logic controller is electrically connected with the oxygen measuring meter I, the oxygen measuring meter II and the air inlet regulating valve, and the computer software system is electrically connected with the logic controller;
the computer software system comprises an oxygen content main adjusting unit, an oxygen content compensation adjusting unit and an adjusting valve opening calculating unit, wherein the input end of the oxygen content main adjusting unit is connected with the output end of the logic controller, the output end of the oxygen content main adjusting unit is connected with the input end of the oxygen content compensation adjusting unit, the output end of the oxygen content compensation adjusting unit is connected with the input end of the adjusting valve opening calculating unit, and the output end of the adjusting valve opening calculating unit is connected with the input end of the logic controller.
2. The system of claim 1, wherein the primary oxygen content adjusting unit is configured to calculate and determine a combined adjusting valve adjusting variable HzThe oxygen content compensation adjusting unit is used for calculating and determining parameters required by compensation adjustment; and the regulating valve opening calculating unit calculates and determines the opening value of the regulating valve.
3. The system for controlling the oxygen content in the flue gas hood of the sintering machine according to claim 1, wherein every two air inlet adjusting pipes are in one group, 4-6 groups are arranged in total, and the groups are arranged at the top of the flue gas hood at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021309832.9U CN212457868U (en) | 2020-07-07 | 2020-07-07 | System for controlling oxygen content in flue gas hood of sintering machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021309832.9U CN212457868U (en) | 2020-07-07 | 2020-07-07 | System for controlling oxygen content in flue gas hood of sintering machine |
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| CN212457868U true CN212457868U (en) | 2021-02-02 |
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| CN202021309832.9U Active CN212457868U (en) | 2020-07-07 | 2020-07-07 | System for controlling oxygen content in flue gas hood of sintering machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765757A (en) * | 2020-07-07 | 2020-10-13 | 中冶北方（大连）工程技术有限公司 | System and method for controlling oxygen content in flue gas hood of sintering machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765757A (en) * | 2020-07-07 | 2020-10-13 | 中冶北方（大连）工程技术有限公司 | System and method for controlling oxygen content in flue gas hood of sintering machine |
| CN111765757B (en) * | 2020-07-07 | 2024-06-25 | 中冶北方（大连）工程技术有限公司 | System and method for controlling oxygen content in flue gas hood of sintering machine |
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