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Device and method for receiving pulverized coal by utilizing negative pressure

A pulverized coal and negative pressure technology, which is applied in the field of coal injection in ironmaking blast furnaces, can solve the problems of pulverized coal leakage, large footprint, and high cost, and achieve the effects of improving work efficiency, avoiding pulverized coal leakage, and small footprint

Inactive Publication Date: 2021-01-29
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a device and method for pulverizing coal powder by using negative pressure, which is used to solve the problems existing in the prior art, such as high cost, large floor area, large safety risk, prone to coal powder leakage and stop spraying, and The problem of not being able to pollinate various types of coal powder

Method used

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  • Device and method for receiving pulverized coal by utilizing negative pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, a device for pulverized coal pulverized by negative pressure includes a pneumatic tank car 1, a pulverized coal filter 4, a coal mill 10 and a pulverized coal bag collector 12, and a coal lowering valve 2 is installed on the pneumatic tank car 1. The powder filter 4 is connected with the first powder receiving pipeline 3, and the other end of the first powder receiving pipeline 3 is provided with a quick joint, which is connected with the lower coal valve 2 of the pneumatic tanker 1, and the coal powder filter 4 is also connected with a second powder receiving pipeline. Pipeline 8, the first gate valve 5 and the second gate valve 9 are installed on the second powder receiving pipeline 8, the booster pipeline 6 is connected to the second powder receiving pipeline 8, the booster valve 7 is installed on the booster pipeline 6, and the coal mill 10 It is connected with the pulverized coal bag collector 12 through a powder outlet pipeline 11 , and ...

Embodiment 2

[0043] On the basis of embodiment 1, a kind of method utilizing negative pressure to carry out pulverized coal pulverization comprises the steps:

[0044] Step S1: Pneumatic tanker 1 transports the purchased coal powder to the pulverized operation point;

[0045] Step S2: pressurize the purchased pulverized coal in the pneumatic tanker 1;

[0046] Step S3: Connect the coal lowering valve 2 of the pneumatic tanker 1 to the quick connector of the pulverized pipeline;

[0047] Step S4: After the pressure of the pneumatic tanker 1 reaches the specified value, close the pressurization valve, and open the first gate valve 5, the second gate valve 9 and the booster valve 7 in sequence;

[0048] Step S5: Open the lower coal valve 2, and the purchased coal powder enters the coal powder filter 4 through the first pulverized pipeline 3;

[0049] Step S6: The purchased pulverized coal is filtered by the pulverized coal filter 4 and enters the pulverized coal outlet pipeline 11 through the...

Embodiment 3

[0054] On the basis of the above embodiments, the boosting medium in the boosting pipeline 6 is heated nitrogen, and the temperature of the heated nitrogen is 80-120°C.

[0055] During the transportation of the purchased pulverized coal, the temperature of the pulverized coal gradually drops. When it reaches the second pulverized pipeline 8DN150, the temperature of the pulverized coal is 35°C to 50°C, resulting in the pulverized coal being in a state of low-temperature condensation and poor fluidity. In order to prevent pulverized coal from being pulverized The phenomenon of pulverized coal blocking the pipeline occurs in the pipeline, and the booster medium uses heated nitrogen, which can be heated to 120°C, which can not only preheat the pulverized coal, but also reduce the condensation of pulverized coal, which is conducive to improving the flow of pulverized coal In the vertical section of the second pulverized pipeline 8, pulverized coal can pass through quickly.

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Abstract

The invention provides a device and method for receiving pulverized coal by utilizing negative pressure, and mainly relates to the technical field of coal injection of iron-making blast furnaces. Thedevice comprises a pneumatic tank car, a pulverized coal filter, a coal mill and a pulverized coal cloth bag collector, a coal discharging valve is mounted on the pneumatic tank car, and the pulverized coal filter is connected with a first pulverized coal receiving pipeline; a quick connector is arranged at the other end of the first pulverized coal receiving pipeline and connected with the coal discharging valve of the pneumatic tank car, a second pulverized coal receiving pipeline is further connected to the pulverized coal filter, a first gate valve and a second gate valve are installed onthe second pulverized coal receiving pipeline, a boosting pipeline is connected to the second pulverized coal receiving pipeline, and a boosting valve is installed on the boosting pipeline; and the coal mill is connected with the pulverized coal cloth bag collector through a pulverized coal outlet pipeline, the other end of the second pulverized coal receiving pipeline is connected with the pulverized coal outlet pipeline, and the pulverized coal cloth bag collector is further connected with a main exhaust fan. The device not only has the characteristics of low cost, small occupied area, safety and reliability, but also can achieve the purpose of receiving various types of pulverized coal.

Description

technical field [0001] The invention relates to the technical field of coal injection in ironmaking blast furnaces, in particular to a device and method for pulverizing coal dust by using negative pressure. Background technique [0002] In the iron and steel industry, blast furnace coal injection is a very important component system. In enterprises with many blast furnaces, direct, indirect or a combination of the two modes of injection process is generally adopted, while enterprises with few blast furnaces mainly adopt direct injection process , whether it is an indirect injection process or a direct injection process, the pulverized coal transport between coal injection systems is mainly carried out in the form of pipeline transportation, and the process in the form of pipeline transportation is high in cost and occupies a large area. During the process, safety and environmental protection incidents such as pulverized coal leakage are prone to occur; for enterprises with f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B7/18
CPCC21B7/205
Inventor 陈世太杨斌史建雄祁占林魏俊孔
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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