Pneumatic ash conveying device for dry dedusting of blast furnace

Abstract

The utility model belongs to the technical field of iron and steel smelting, and particularly relates to a blast furnace dry dedusting pneumatic ash conveying device which comprises a plurality of first dedusting box bodies and a plurality of second dedusting box bodies, the first dedusting box bodies are evenly installed on a first nitrogen ash conveying pipeline, and the second dedusting box bodies are evenly installed on a second nitrogen ash conveying pipeline. The first end of the second nitrogen ash conveying pipeline is connected with the first end of the first nitrogen ash conveying pipeline, the first nitrogen ash conveying pipeline is connected with the nitrogen tank, and the second end of the first nitrogen ash conveying pipeline and the second end of the second nitrogen ash conveying pipeline are both connected with the dust collecting bin; the whole operation process of the ash conveying device is in a totally-closed state, so that dust raising and environment pollution are avoided; the labor intensity of workers is reduced; and a foundation is laid for subsequent automatic operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel smelting, and in particular relates to a blast furnace dry dust removal pneumatic ash conveying device. Background Art

[0002] The dust removal method of dry dust removal is relative to wet dust removal. Dry dust removal generally uses bag dust collectors. The semi-clean gas from the gravity dust collector enters the lower box of the dust collector through the branch pipe. The dusty gas reaches the bag for filtration. The fine dust is attached to the outer surface of the filter bag after filtration. The purified gas is collected in the upper box through the filter bag and sent out through the clean gas branch pipe and the main pipe. The dust is raised during the transportation of the dry box dust scraper, and the carbon monoxide exceeds the standard. In order to promote the prevention and control of air pollution, the blast furnace dry box output system is technically transformed.

[0003] Each box of the existing blast furnace dry dust collector is equipped with a pneumatic upper ball valve, an intermediate ash bin, a pneumatic lower ball valve, and a scraper. The scraper is connected to the bucket elevator to transport the ash from the dust collector box to the ash collecting bin, and then transported to the next process by vehicle.

[0004] Dry dust removal ash is prone to dust and environmental pollution during transportation by scraper conveyor. The bucket elevator is prone to blockage, which makes maintenance and repair more troublesome. In addition, carbon monoxide is prone to exceed the standard during ash transportation, which poses a hidden danger to employee safety. Utility Model Content

[0005] The utility model aims to provide a pneumatic ash conveying device for dry dust removal of blast furnace.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a blast furnace dry dust removal pneumatic ash conveying device, comprising a plurality of first dust removal boxes and a plurality of second dust removal boxes, the plurality of first dust removal boxes are evenly installed on the first nitrogen ash conveying pipeline, the plurality of second dust removal boxes are evenly installed on the second nitrogen ash conveying pipeline, the first end of the second nitrogen ash conveying pipeline is connected to the first end of the first nitrogen ash conveying pipeline, the first nitrogen ash conveying pipeline is connected to the nitrogen tank, and the second end of the first nitrogen ash conveying pipeline and the second end of the second nitrogen ash conveying pipeline are both connected to the dust collecting bin.

[0007] Specifically, the bottoms of the first dust removal box and the second dust removal box are both provided with a dust discharge ball valve, a bell valve and a ceramic wear-resistant ball valve.

[0008] Specifically, a relief valve is provided on the top of the dust collecting bin.

[0009] Specifically, a nitrogen ash conveying ball valve is disposed at the first end of the first nitrogen ash conveying pipeline and the first end of the second nitrogen ash conveying pipeline.

[0010] The utility model has the following beneficial effects:

[0011] 1) The entire ash conveying device operation process is in a fully enclosed state, eliminating dust and environmental pollution;

[0012] 2) Reduce the labor intensity of employees;

[0013] 3) Lay a solid foundation for future automated operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] In the figure: 1-nitrogen tank; 2-first dust removal box; 3-ash unloading ball valve; 4-bell valve; 5-ceramic wear-resistant ball valve; 6-first nitrogen ash conveying pipeline; 7-nitrogen ash conveying ball valve; 8-ash collecting bin; 9-release valve; 10-second dust removal box; 11-second nitrogen ash conveying pipeline. DETAILED DESCRIPTION

[0016] The utility model will now be further described in detail with reference to the accompanying drawings.

[0017] like Figure 1 As shown, a blast furnace dry dust removal pneumatic ash conveying device includes a plurality of first dust removal boxes 2 and a plurality of second dust removal boxes 10, wherein the plurality of first dust removal boxes 2 are evenly installed on the first nitrogen ash conveying pipe 6, and the plurality of second dust removal boxes 10 are evenly installed on the second nitrogen ash conveying pipe 11, the first end of the second nitrogen ash conveying pipe 11 is connected to the first end of the first nitrogen ash conveying pipe 6, the first nitrogen ash conveying pipe 6 is connected to the nitrogen tank 1, and the second end of the first nitrogen ash conveying pipe 6 and the second end of the second nitrogen ash conveying pipe 11 are both connected to the dust collecting bin 8.

[0018] The bottom of the first dust removal box 2 and the bottom of the second dust removal box 10 are both provided with a dust discharge ball valve 3, a bell valve 4 and a ceramic wear-resistant ball valve 5, and the top of the dust collecting bin 8 is provided with a release valve 9.

[0019] A nitrogen ash conveying ball valve 7 is provided at the first end of the first nitrogen ash conveying pipeline 6 and the first end of the second nitrogen ash conveying pipeline 11 .

[0020] The method of using the utility model is as follows: first, open the dispersion valve 9, then open the nitrogen ash conveying ball valve 7 to purge the first nitrogen ash conveying pipeline 6 and the second nitrogen ash conveying pipeline 11 for 2 minutes to ensure that the first nitrogen ash conveying pipeline 6 and the second nitrogen ash conveying pipeline 11 are unblocked; then, open the ceramic wear-resistant ball valve 5, the bell valve 4, and the ash discharge ball valve 3 of one of the first dust collector boxes 2 in sequence, start to convey ash, and convey the dust ash to the ash collecting bin 8. After one of the first dust collector boxes 2 is emptied, close the ash discharge ball valve 3, the bell valve 4, and the ceramic wear-resistant ball valve 5 in sequence. After an interval of 2 minutes, empty the remaining first dust removal boxes 2 and the second dust removal boxes 10 one by one according to the above steps. After the ash conveying is completed, close the nitrogen ash conveying ball valve 7, and close the dispersion valve 9 after an interval of 30 seconds.

[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0022] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace dry dust removal pneumatic ash conveying device, characterized in that: It includes a plurality of first dust removal boxes and a plurality of second dust removal boxes, wherein the plurality of first dust removal boxes are evenly installed on the first nitrogen ash conveying pipeline, the plurality of second dust removal boxes are evenly installed on the second nitrogen ash conveying pipeline, the first end of the second nitrogen ash conveying pipeline is connected to the first end of the first nitrogen ash conveying pipeline, the first nitrogen ash conveying pipeline is connected to the nitrogen tank, and the second end of the first nitrogen ash conveying pipeline and the second end of the second nitrogen ash conveying pipeline are both connected to the dust collecting bin.

2. A blast furnace dry dust removal pneumatic ash conveying device according to claim 1, characterized in that: The bottoms of the first dust removal box and the second dust removal box are both provided with a dust discharge ball valve, a bell valve and a ceramic wear-resistant ball valve.

3. A blast furnace dry dust removal pneumatic ash conveying device according to claim 1, characterized in that: A relief valve is arranged on the top of the dust collecting bin.

4. A blast furnace dry dust removal pneumatic ash conveying device according to claim 1, characterized in that: The first end of the first nitrogen ash conveying pipeline and the first end of the second nitrogen ash conveying pipeline are both provided with nitrogen ash conveying ball valves.

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