Method for reducing dry method crude gas main pipeline ash deposition
A technology of raw gas and raw gas, which is applied in the field of blast furnace dry gas dust removal, can solve problems such as increasing the pressure of the supporting structure of the branch pipe of raw gas in the box, increasing the difficulty and workload of maintenance and cleaning, and affecting the ability of the blast furnace to process gas. Guaranteed normal processing capacity, reduced labor and maintenance costs, and avoided blockage
Inactive Publication Date: 2020-11-20
SHANXI TAIGANG STAINLESS STEEL CO LTD
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Problems solved by technology
[0006] 1. In daily production, the box is often blocked by dust accumulation in the pipeline, and it is forced to withdraw from the box
This will seriously affect the ability of the blast furnace to process gas, and even reduce the capacity of the blast furnace due to the reduction of the ability to dry process gas
[0007] 2. Severe dust accumulation in the pipeline will increase the pressure on the supporting structure of the gas branch pipe of the box body, and in severe cases, the gas branch pipe of the box body will collapse
[0008] 3. When the dust accumulation in the pipeline is serious, it will increase the difficulty and workload of maintenance and cleaning, increase labor costs and prolong the maintenance time
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[0018] Blast furnace raw gas belongs to dusty gas. When this dusty gas flows at different speeds in the pipeline, different dust drop phenomena will occur. When the diameter of dust particles in the gas is constant, the greater the gas flow rate, the less obvious the phenomenon of dust drop. On the contrary, the smaller the gas flow rate, the greater the dust drop. When the gas flow rate is constant, the larger the diameter of dust particles in the gas, the more obvious the dust drop. Therefore, it is necessary to reasonably control the number of dry-process tanks and the usage method under different gas volumes according to the actual production situation, so as to control the gas flow rate, so as to achieve the smallest amount of dust drop in the raw gas branch pipes of the tank and not block the tank. The purpose of the waste gas branch pipe.
[0019] Taking the 3# blast furnace of Taiyuan Iron and Steel Co., Ltd. as an example, the reasonable average flow velocity range of t...
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The invention relates to the field of blast furnace dry method gas ash removal and discloses a method for reducing dry method crude gas main pipeline ash deposition. The method comprises the followingsteps that 1, a maximum value Q1 and a minimum value Q2 of a flow range of a crude gas branch pipe of box bodies are determined according to the change of the crude gas main pipeline ash deposition amount obtained by each maintenance of a blast furnace, an average value Q3 of the flow of the crude gas branch pipe of the box bodes is equal to (Q1 + Q2) / 2, a maximum flow Q4 of a crude gas main pipeline is obtained according to experience, the total number of the dry method box bodies is n1, Q4 / Q2 is rounded, and if a remainder of Q4 / Q2 is 0, n1 is equal to [Q4 / Q2], otherwise n1 is equal to [Q4 / Q2]+1; 2, it is determined that the number n2 of the dry method box bodies used is equal to Q5 / Q3 according to an actual flow Q5 of the crude gas main pipeline, wherein n2 is rounded by using a rounding-off method; and 3, a second valve and a corresponding third valve are opened according to the number n2 of the dry method box bodies.
Description
Technical field [0001] The invention relates to the field of blast furnace dry gas dust removal. Background technique [0002] Blast furnace gas is one of the by-products of blast furnace production. Every day blast furnace production produces a large amount of blast furnace gas (calculated by a medium-sized blast furnace with a daily production capacity of 4500t, the daily gas volume is about 6.18 million m³). Because the blast furnace gas moves from bottom to top in the blast furnace, and the blast furnace charge is from It moves from top to bottom, so the blast furnace gas will inevitably contain furnace dust. In order to make the blast furnace gas meet the standard of use, the blast furnace gas must undergo a process of dust removal. Dry dust removal is the most advanced process of modern blast furnace dust removal. [0003] In daily blast furnace production, the blast furnace gas with furnace dust must first be filtered by a gravity dust collector (a coarse dust removal equi...
Claims
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IPC IPC(8): C21B7/22
CPCC21B7/22C21B2100/44
Inventor 冀岗张军路振毅代新文
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD