CN214655052U - Online monitoring system for blast furnace drying process - Google Patents
Online monitoring system for blast furnace drying process Download PDFInfo
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- CN214655052U CN214655052U CN202121116360.XU CN202121116360U CN214655052U CN 214655052 U CN214655052 U CN 214655052U CN 202121116360 U CN202121116360 U CN 202121116360U CN 214655052 U CN214655052 U CN 214655052U
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Abstract
The utility model discloses an on-line monitoring system of blast furnace baker process, the air intake of hot-blast furnace passes through cold wind house steward and connects the air-blower, the air outlet of hot-blast furnace passes through the air intake that hot-blast house steward connects the blast furnace, the air outlet of blast furnace is equipped with the online dew point analysis appearance of air-out, be equipped with the online dew point analysis appearance of income wind in the hot-blast house steward, the online dew point analysis appearance of income wind and the online dew point analysis appearance of air-out connect data acquisition processing system through the data line to carry the signal of gathering to data acquisition processing system. The utility model discloses monitoring system can gather the data that online water content detecting system transmitted in real time, combines the relevant parameter of blast furnace baker in-process, judges the baker effect, provides the foundation for operation on next step, has realized the target of on-line monitoring accuracy, real-time, the suitability of blast furnace baker process.
Description
Technical Field
The utility model relates to a blast furnace monitoring technology field.
Background
The blast furnace blow-in is carried out when a newly built or after overhaul blast furnace is put into iron-making production, and is an important blast furnace operation, and the important blast furnace operation is related to whether the blast furnace can successfully reach the rated economic and technical indexes and the service life of a first-generation furnace in a specified time. The blast furnace blowing-in comprises four steps: (1) baking the furnace; (2) charging; (3) igniting; (4) the method is shifted to normal production, and the basic requirements are safety, smoothness, qualified products, no damage to furnace linings and the like.
As the first step of blast furnace blowing, the purpose of the furnace is to dry the moisture in the refractory brickwork of the blast furnace and the brick joint filler in the slow heating process, so as to avoid the cracking and deformation of the brick lining in the violent heating process after production to damage equipment and the refractory brickwork, ensure the integrity of the brickwork and the integrity of the furnace shape and prolong the service life of the blast furnace.
At present, the main blast furnace baking mode adopts a hot blast furnace baking mode, namely air is heated by a hot blast furnace for blast, hot air is sent into the blast furnace from a tuyere and is discharged through a furnace top bleeding valve. The oven was completed when the H2O content in the top gas had dropped to an air H2O content level. The furnace drying time is 5-10 days according to different blast furnace volumes and refractory material types.
The traditional oven effect judgment mode mainly adopts an artificial subjective judgment mode, such as whether liquid water is separated out or not, whether water vapor is white smoke or not in waste gas is observed by naked eyes, and the like, which brings certain uncertainty for the judgment of the oven effect: the service life and the operation safety of the blast furnace are directly influenced due to insufficient furnace drying, a large amount of energy waste is caused due to excessive furnace drying, the furnace opening time of the blast furnace is prolonged, and the enterprise benefit is directly influenced.
The method has great significance for establishing a set of rapid and accurate online monitoring system and a monitoring and judging method for the blast furnace drying process based on the fact that the blast furnace drying process and effect directly influence the economic and technical indexes of the blast furnace and the service life of a first-generation furnace.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that realize a blast furnace baker process quick, accurate on-line monitoring system and monitoring method of judging, guide the blast furnace baker operation, guarantee that the blast furnace blow-in reaches rated economic technology index smoothly in the specified time to can guarantee the life-span of a generation stove labour.
In order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides an online monitoring system of blast furnace baker process, the air intake of hot-blast furnace passes through cold wind house steward and connects the air-blower, the air outlet of hot-blast furnace passes through the air intake that hot-blast house steward connects the blast furnace, the air outlet of blast furnace is equipped with the online dew point analysis appearance of air-out, be equipped with the online dew point analysis appearance of income wind in the hot-blast house steward, the online dew point analysis appearance of income wind and the online dew point analysis appearance of air-out connect data acquisition processing system through the data line to carry the signal of gathering to data acquisition processing system.
The air outlet of the blast furnace is arranged at the upper part of the blast furnace, and the air inlet of the blast furnace is arranged at the lower part of the blast furnace.
The air outlet of the blast furnace is connected with a coal gas downcomer.
Sampling holes are formed in the upper portions of the hot air main pipe and the coal gas down pipe, each sampling hole is connected with a sampling pipe, and probes of the air inlet online dew point analyzer and the air outlet online dew point analyzer are placed in the sampling pipes.
The utility model discloses monitoring system can gather the data that online water content detecting system transmitted in real time, combines the relevant parameter of blast furnace baker in-process, judges the baker effect, provides the foundation for operation on next step, has realized the target of on-line monitoring accuracy, real-time, the suitability of blast furnace baker process.
Drawings
The following brief descriptions of the contents expressed by each figure and the marks in the figures in the specification of the present invention are as follows:
FIG. 1 is a schematic diagram of an on-line monitoring system for a blast furnace baking process;
the labels in the above figures are: 1. a blast furnace; 2. a hot blast stove; 3. a blower; 4. a cold air main pipe; 5. a hot air main pipe; 6. an air inlet online dew point analyzer; 7. sampling points; 8. an air outlet online dew point analyzer; 9. a gas down pipe; 10. and a data acquisition and processing system.
Detailed Description
The following description of the embodiments with reference to the drawings is intended to illustrate the present invention in further detail, such as the shapes and structures of the components, the mutual positions and connections between the components, the functions and working principles of the components, the manufacturing process, and the operation and use methods, etc., so as to help those skilled in the art understand the present invention more completely, accurately and deeply.
The monitoring system is based on the moisture balance theory of the drying process, namely, in the process of drying the blast furnace 1, the moisture brought by hot air is added, the moisture evaporated by the refractory material in the blast furnace 1 is equal to the moisture brought out by waste gas, when the moisture brought by hot air is consistent with the moisture brought out by waste gas, the moisture in the furnace can be considered not to be evaporated any more, the drying process is completed, the moisture brought by hot air and the moisture brought out by waste gas are monitored and compared, the drying effect is judged, online monitoring is carried out on air inlet and air outlet of the blast furnace 1 by adopting an online dew point analysis technology, the drying effect is reflected in real time by combining the drying process of the blast furnace 1, a basis is provided for the next operation, and the measured absolute humidity data is taken as the reference, so that the drying process is accurate and reliable.
An on-line monitoring system for the baking process of a blast furnace 1 is shown in figure 1 and mainly relates to the following components:
1, a blast furnace: the steel plate is used as a furnace shell, a refractory brick lining is built in the shell, in the process of drying the blast furnace 1, the blast furnace is in an empty state, hot air from the hot blast furnace 2 enters from a tuyere at the bottom of the furnace and is discharged from a top diffusing pipe and a gas pipe
And (3) hot blast stove 2: the function is to heat the blast to the required temperature to improve the efficiency and efficiency of the blast furnace 1; in the process of drying the blast furnace 1, the hot blast furnace 2 is used as a heat source for drying moisture in the blast furnace 1 and provides hot air with corresponding temperature and flow according to the requirement of a temperature rise curve in the process of drying the blast furnace;
a blower 3: the hot blast stove 2 uses an air power source, and ambient air is pressurized and then sent into an air main pipe;
a cold air main pipe 4: high-pressure air from the blower 3 is sent into the hot blast stove 2 through the high-pressure air;
the hot air main pipe 5: the high-temperature and high-pressure air heated by the hot blast stove 2 is sent into the blast furnace 1 through the high-temperature and high-pressure air;
air inlet online dew point analyzer 6: the device is arranged near a hot air main pipe 5, the inlet air is collected through a sampling hole of the hot air main pipe 5, and the water content (dew point) of the inlet air is analyzed after dust removal, constant temperature and constant flow treatment;
sample point 7: sampling holes are formed above the hot air main pipe 5 and the coal gas down pipe 9, each sampling hole is connected with a sampling pipe, probes of the air inlet online dew point analyzer 6 and the air outlet online dew point analyzer 8 are placed in the sampling pipes and are arranged on the upper parts of the air pipes through holes, liquid water in the gas is prevented from being discharged through the probes, and a sampling point 7 is formed for measurement;
air-out online dew point analyzer 8: the device is arranged near a gas down pipe 9, the outlet gas is collected through a sampling hole of the gas down pipe 9, and the water content (dew point) of the inlet gas is analyzed after dust removal, constant temperature and constant flow treatment;
gas down pipe 9: the coal gas generated in the production process of the blast furnace 1 is sent and treated by the external coal gas for reuse. The flue gas discharged in the process of baking the blast furnace 1 is discharged to the atmosphere through the flue gas;
the data acquisition and processing system 10: the data acquisition and processing system 10 is mainly used for acquiring data transmitted from the online water content detection system in real time, judging the furnace baking effect by combining related thermal parameters in the furnace baking process of the blast furnace 1, providing a basis for the next operation, and can be provided with a storage, display and judgment unit for storing, displaying, analyzing and judging the acquired data information.
In the working process, ambient air is pressurized by the air blower 3, then is sent into the hot blast stove 2 through the cold air header pipe 4, is heated by the hot blast stove 2, then is sent into the blast furnace 1 from the air supply outlet at the bottom of the blast furnace 1 through the hot air header pipe 5, and is discharged to the atmosphere through the coal gas downcomer 9 at the top of the blast furnace 1. A sampling hole is arranged above the hot air main pipe 5 through an opening and is connected with an air inlet online dew point analyzer 6 through a sampling pipe, the air inlet online dew point analyzer 6 is connected with a data acquisition and processing system 10 through a data line, a sampling hole is arranged above the coal gas downcomer 9 through an opening and is connected with an air outlet online dew point analyzer 8 through a sampling pipe, and the air outlet online dew point analyzer 8 is connected with the data acquisition and processing system 10 through a data line. Therefore, the acquired data is transmitted to the data acquisition and processing system 10, the data acquisition and processing system 10 stores and displays the acquired data, and whether the acquired data is qualified or not can be judged manually or automatically through a set comparison program.
The online water content detection system mainly comprises two sets of online water content analyzers for air inlet and air outlet, and has the functions of monitoring the change conditions of the water content of hot air entering and waste gas discharging of the blast furnace 1 in real time in the process of drying the furnace, wherein the measuring point of the online water content analyzer for air inlet is positioned at a hot air main pipe 5 at the inlet of the hot air furnace 2, the measuring point of the online water content analyzer for air outlet is positioned at a coal gas downcomer 9 at the top of the blast furnace 1, and the online water content detection system for air inlet and air outlet is positioned at a positive pressure section and has strong sampling representativeness; the optical mirror method dew point measurement principle is adopted, and the measurement range is as follows: the temperature is minus 40 ℃ to 90 ℃, the humidity is 0.5 percent to 100 percent RH, and the dew point precision is plus or minus 0.2 ℃; the analyzer is provided with an independent gas treatment system, has the functions of dust removal, constant temperature (about 60 ℃) and constant current (1000ml/min), and ensures the measurement precision; the on-line analysis system adopts a movable mode, which is convenient for rapid cutting and dismantling after the furnace baking is finished and is shared by other blast furnaces 1.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.
Claims (4)
1. The utility model provides an on-line monitoring system of blast furnace baker process, the air intake of hot-blast furnace passes through cold wind house steward and connects the air-blower, the air outlet of hot-blast furnace passes through the air intake of hot-blast house steward connection blast furnace, its characterized in that: the air outlet of the blast furnace is provided with an air outlet online dew point analyzer, an air inlet online dew point analyzer is arranged in the hot air main pipe, the air inlet online dew point analyzer and the air outlet online dew point analyzer are connected with a data acquisition and processing system through a data line, and the acquired signals are transmitted to the data acquisition and processing system.
2. The on-line monitoring system for a blast furnace baking process according to claim 1, wherein: the air outlet of the blast furnace is arranged at the upper part of the blast furnace, and the air inlet of the blast furnace is arranged at the lower part of the blast furnace.
3. The on-line monitoring system for the blast furnace baking process according to claim 1 or 2, wherein: the air outlet of the blast furnace is connected with a coal gas downcomer.
4. The on-line monitoring system for a blast furnace baking process according to claim 3, wherein: sampling holes are formed in the upper portions of the hot air main pipe and the coal gas down pipe, each sampling hole is connected with a sampling pipe, and probes of the air inlet online dew point analyzer and the air outlet online dew point analyzer are placed in the sampling pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121116360.XU CN214655052U (en) | 2021-05-24 | 2021-05-24 | Online monitoring system for blast furnace drying process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121116360.XU CN214655052U (en) | 2021-05-24 | 2021-05-24 | Online monitoring system for blast furnace drying process |
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| Publication Number | Publication Date |
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| CN214655052U true CN214655052U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121116360.XU Active CN214655052U (en) | 2021-05-24 | 2021-05-24 | Online monitoring system for blast furnace drying process |
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| CN (1) | CN214655052U (en) |
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2021
- 2021-05-24 CN CN202121116360.XU patent/CN214655052U/en active Active
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