Gas detection device of coal grinding system for blast furnace

Abstract

The utility model discloses a gas detection device of a coal milling system for a blast furnace. The coal milling system comprises a coal mill and a powder collector, and a discharge port of the coal mill is communicated with an air inlet pipeline of the powder collector; comprising a first metallurgical process analysis system, a second metallurgical process analysis system, a first collection pump, a second collection pump, a first collection probe and a second collection probe, a feeding pipe is arranged on a feeding hole of the coal mill; the side wall of the feeding pipe is communicated with a sampling branch pipe; the first acquisition probe is accommodated in the sampling branch pipe. The device can improve the accuracy of the detection result of the content of CO and O2 in the environment in the coal mill and the powder collector.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of steelmaking production, in particular to a gas detection device for a coal grinding system of a blast furnace. BACKGROUND

[0002] In the existing steelmaking process, a blast furnace is a heat source for ironmaking, and is crucial. The blast furnace uses coal powder as fuel to generate heat. The coal powder is fluidized by a carrier gas and then sent into the blast furnace for incineration to ensure the temperature of the blast furnace. Whether the temperature of the blast furnace is stable is directly related to the quality of the steelmaking product. The temperature of the coal powder when entering the blast furnace and the stability of the gas flow are directly related to the temperature of the blast furnace.

[0003] The internal CO and O2 contents of the coal mill and the powder collector in the coal injection system cannot be detected. When the CO and O2 contents reach a certain concentration, combustion is easy to occur, and even explosion may be caused, resulting in serious safety accidents.

[0004] The detection results of the CO and O2 contents of the existing coal mill and powder collector are low in accuracy, which affects the accuracy of the detection results and increases the production safety hazards.

[0005] The existing gas concentration change cannot be monitored in real time, and historical data cannot be traced back, which affects the monitoring of the gas concentration change.

[0006] The information disclosed in the background section is only intended to increase the understanding of the overall background of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. CONTENT OF THE PRESENT INVENTION

[0007] The application provides a gas detection device for a coal grinding system of a blast furnace, which can improve the accuracy of the detection results of the CO and O2 contents in the internal environment of the coal mill and the powder collector.

[0008] The application provides a gas detection device for a coal grinding system of a blast furnace, which can improve the accuracy of the detection results of the CO and O2 contents in the internal environment of the coal mill and the powder collector.

[0009] The application provides a gas detection device for a coal grinding system of a blast furnace, which can improve the accuracy of the detection results of the CO and O2 contents in the internal environment of the coal mill and the powder collector.

[0010] The application provides a gas detection device for a coal grinding system of a blast furnace, which can improve the accuracy of the detection results of the CO and O2 contents in the internal environment of the coal mill and the powder collector.

[0011] The application provides a gas detection device for a coal grinding system of a blast furnace, which can improve the accuracy of the detection results of the CO and O2 contents in the internal environment of the coal mill and the powder collector.

[0012] The first collecting probe is communicated with a sample inlet pipeline of the first metallurgical process analysis system, and a first collecting pump is arranged on the communication pipeline;

[0013] The second metallurgical process analysis system is communicated with a sample inlet pipeline of the second collecting probe, and a second collecting pump is arranged on the communication pipeline.

[0014] Preferably, the end of the sampling branch pipe communicated with the feed pipe is spaced from the feed inlet of the coal mill by 4-6 m.

[0015] Preferably, the included angle between the sampling branch pipe and the feed pipe is 30-45°.

[0016] Preferably, the extension end of the sampling branch pipe is a closed end.

[0017] Preferably, the device comprises a data storage module and a display, and the first metallurgical process analysis system is electrically connected with the data storage module and the display.

[0018] Preferably, the device comprises a monitoring room, and the data storage module and the display are arranged in the monitoring room.

[0019] Preferably, the device comprises a data storage module and a display, and the second metallurgical process analysis system is electrically connected with the data storage module and the display.

[0020] Preferably, the device comprises a monitoring room, and the data storage module and the display are arranged in the monitoring room.

[0021] The application can produce beneficial effects including:

[0022] 1) The blast furnace coal milling system gas detection device provided by the application realizes real-time monitoring of the concentration change of key gases in the coal mill by arranging an inclined pipe at the feed inlet of the coal mill, arranging a gas sample collecting probe in the inclined pipe, and arranging a gas sample collecting probe on the inner wall of the powder collector, thereby ensuring the accuracy of the detection results and improving the production safety. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 The blast furnace coal milling system gas detection device provided by at least one embodiment of the application is shown in the schematic diagram;

[0024] Fig. 2 The module connection of the blast furnace coal milling system gas detection device provided by at least one embodiment of the application is shown in the schematic diagram.

[0025] LEGEND:

[0026] The first metallurgical process analysis system 1, the second metallurgical process analysis system 2,

[0027] The first collecting pump 11, the second collecting pump 21, the first collecting probe 12, the second collecting probe 22,

[0028] The coal mill 4, the powder collector 5, the induced draft fan 51,

[0029] The sampling branch pipe 41, the feeding pipe 42, the display 212, the data storage module 211. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the detailed description of the embodiments of the present application provided in the drawings below is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] The controller used in the present embodiment is an existing structure, and the control circuit can be realized by simple programming of those skilled in the art, which belongs to the common knowledge in the art. Only the use is described, and no modification is made, so the control mode and circuit connection are not described in detail.

[0033] The technical means not described in detail in the present application and not used to solve the technical problems of the present application are set according to the common knowledge in the art, and various common knowledge setting modes can be realized.

[0034] Referring to Figs. 1-2 The blast furnace coal grinding system gas detection device provided by the present application comprises a first metallurgical process analysis system 1, a second metallurgical process analysis system 2, a first collection pump 11, a second collection pump 21, a first collection probe 12, a second collection probe 22, a coal mill 4, a powder collector 5 and an induced draft fan 51.

[0035] The sampling branch pipe 41 is arranged near the feeding pipe 42 of the coal mill 4; the first collection probe 12 is arranged in the sampling branch pipe 41; and the first collection pump 11 and the first collection probe 12 are in pipeline communication.

[0036] The gas outlet of the first collection pump 11 is in pipeline communication with the sample inlet of the first metallurgical process analysis system 1; and the collected gas sample is analyzed and processed by the first metallurgical process analysis system 1, so that the real-time gas concentration content can be obtained.

[0037] The outlet of the coal mill 4 is connected with the inlet of the powder collector 5, and the outlet of the powder collector 5 is connected with the outlet pipe of the outlet of the coal mill 4. The outlet of the powder collector 5 is connected with the outlet pipe of the outlet of the coal mill 4. The outlet of the powder collector 5 is connected with the outlet pipe of the outlet of the coal mill 4.

[0038] The second collection probe 22 is arranged on the upper side wall of the powder collector 5 and is connected with the second collection pump 21. The outlet of the second collection pump 21 is connected with the inlet of the second metallurgical process analysis system 2. The second collection probe 22 arranged at this position can improve the detection accuracy of the change of the gas content in the powder collector 5.

[0039] In an embodiment, the first metallurgical process analysis system 1 is electrically connected with the data storage module 211, and the obtained results are transmitted to the data storage module 211 for storage, so as to facilitate subsequent data analysis.

[0040] In an embodiment, the display 212 is arranged in the monitoring room. The display 212 is electrically connected with the first metallurgical process analysis system 1, so as to facilitate the real-time monitoring of the multiple detection points in the monitoring room by the operator. The data storage module 211 can also be arranged in the monitoring room according to the need.

[0041] In an embodiment, the end of the sampling branch pipe 41 connected with the feeding pipe 42 is spaced apart from the feeding inlet by 4-6 m. The arrangement can ensure that the gas entering the branch pipe has representative concentration, so as to improve the accuracy of the detection results.

[0042] In an embodiment, the angle between the sampling branch pipe 41 and the feeding pipe 42 is 30-45°. The arrangement can ensure that the gas in the coal mill 4 enters the sampling branch pipe 41 in time and smoothly, so as to ensure the accuracy of the detection results.

[0043] In an embodiment, the end of the sampling branch pipe 41 is closed, so as to avoid the gas leakage affecting the accuracy of the gas detection results.

[0044] In an embodiment, the second metallurgical process analysis system 2 is electrically connected with the data storage module 211, and the obtained results are transmitted to the data storage module 211 for storage, so as to facilitate subsequent data analysis.

[0045] In an embodiment, the display 212 is electrically connected with the second metallurgical process analysis system 2, so as to facilitate the real-time monitoring of the multiple detection points in the monitoring room by the operator. The data storage module 211 can also be arranged in the monitoring room according to the need.

[0046] The gas on-line analyzer used in the application is a metallurgical process analysis system produced by Chongqing Chuan Instrument Co., Ltd., and the model is PS7600-PA200-GXH. The system comprises: a metallurgical process analysis system, a collection pump and a gas collection probe. The coal mill used is an MPS type coal mill produced by Xi'an Thermal Research Institute Co., Ltd. The powder collector used is an SDGZ type anti-explosion high-efficiency coal powder collector produced by Nantong Shendong Filter Manufacturing Co., Ltd.

[0047] The data storage module 211 is a large-capacity enterprise-level 2.5-inch SATA, 2.5-inch U.2 NVMe SSD module produced by Weigu Information.

[0048] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gas detection device for a coal pulverizing system for a furnace, the coal pulverizing system comprising: The coal mill (4) and the powder collector (5) are connected by a pipeline. The first metallurgical process analysis system (1), the second metallurgical process analysis system (2), the first collection pump (11), the second collection pump (21), the first collection probe (12), and the second collection probe (22) are characterized by comprising: A feeding pipe (42) is arranged on the feeding inlet of the coal mill (4); a sampling branch pipe (41) is arranged on the side wall of the feeding pipe (42); and the first collection probe (12) is arranged in the sampling branch pipe (41); The second collection probe (22) is arranged on the upper side wall of the powder collector (5); The first collection probe (12) is connected to the sampling inlet of the first metallurgical process analysis system (1) by a pipeline, and the first collection pump (11) is arranged on the pipeline; The second metallurgical process analysis system (2) is connected to the sampling inlet of the second collection probe (22) by a pipeline, and the second collection pump (21) is arranged on the pipeline.

2. The gas detection device for a coal pulverizing system of a blast furnace according to claim 1, characterized by The end of the sampling branch pipe (41) connected to the feeding pipe (42) is spaced apart from the feeding inlet of the coal mill (4) by 4-6 m.

3. The gas detection device for a coal pulverizing system of a blast furnace according to claim 1, characterized by The angle between the sampling branch pipe (41) and the feeding pipe (42) is 30-45°.

4. The gas detection device for a coal pulverizing system of a blast furnace according to claim 1, characterized by The extended end of the sampling branch pipe (41) is a closed end.

5. The gas detection device for a coal pulverizing system of a blast furnace according to claim 1, wherein The data storage module (211) and the display (212) are included. The first metallurgical process analysis system (1) is electrically connected to the data storage module (211) and the display (212). The monitoring room, the data storage module (211), and the display (212) are included.

6. The gas detection device for a coal pulverizing system of a blast furnace according to claim 5, wherein The data storage module (211) and the display (212) are included. The second metallurgical process analysis system (2) is electrically connected to the data storage module (211) and the display (212).

7. The gas detection device for a coal pulverizing system of a blast furnace according to claim 1, wherein The monitoring room, the data storage module (211), and the display (212) are included. ​ ​ 8. The gas detection device for a coal pulverizing system of a blast furnace according to claim 7, wherein ​ ​

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