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Heat exchanger for cold rolling mill sulfuric acid refining on-line

A cold rolling mill acid and heat exchanger technology, applied in the direction of heat exchanger types, direct contact heat exchangers, chemical instruments and methods, etc., can solve problems such as Venturi tube and circulation pipeline blockage, and avoid circulation The effect of pump damage, simple structure and convenient installation

Inactive Publication Date: 2008-07-02
BENXI IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a heat exchanger for the cold rolling mill pickling line that solves the problem of Venturi tube and circulation pipeline blockage by means of filtration

Method used

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  • Heat exchanger for cold rolling mill sulfuric acid refining on-line
  • Heat exchanger for cold rolling mill sulfuric acid refining on-line

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Embodiment Construction

[0011] see figure 1 and figure 2 , these two drawings show the overall structure of the appearance of an embodiment of the heat exchanger used in the pickling line of the cold rolling mill proposed by the present invention. As can be seen from the figure, the heat exchanger comprises two parts, a Venturi device 1 and an acid-resistant filter device 2, wherein a Venturi tube 15 (attached) is arranged in the Venturi device 1 figure 2 Only the structure of the bottom area of ​​the Venturi tube 15 is given in the figure), a high-temperature furnace gas inlet 11 and a waste acid inlet 12 are provided at its upper end, and a high-temperature furnace gas outlet 13 is provided at its lower area, and at the bottom of the Venturi tube 15 A waste acid output pipeline 14 is installed at the bottom. The filter device 2 is installed between the waste acid output pipeline 14 and the bottom of the venturi tube 15 . The filter device 2 includes a filter element 21, which is basically a lo...

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Abstract

The invention discloses a heat interchanger used on a pickling line of a cold calender, and a filtering device of the heat interchanger which is acid resistant is arranged between an output pipeline of acid sludge and the bottom of a venturi pipe. The heat interchanger can effectively resolve the problem that a ferric oxide powder ingot blocks a circular pipeline and avoid the phenomenon of the machine halt of a machine set and the damage of a circular pump which consequently happen; simultaneously as the filtering device is only composed of a filtering core, and an umbrella-shaped element and a supporting part which are respectively arranged in the upper and the lower end of the filtering core, the structure of the invention is comparatively simple and the installation of the invention is very convenient.

Description

Technical field: [0001] The invention relates to a heat exchanger used on a pickling line of a cold rolling mill, in particular to a heat exchanger composed of a Venturi device. Background technique: [0002] In the process of rolling refrigerated steel sheets, cold rolling mills usually need to undergo a pickling stage to remove iron oxide scales on the surface of hot-rolled sheets. In order to regenerate the pickling liquid, one of the steps is to send the pickling liquid into the heat exchanger to heat it through circulation. [0003] In the prior art, the heat exchanger used for warming the pickling solution includes a Venturi device composed of a Venturi tube as the main component. A waste acid output pipeline is installed at the bottom of the Venturi tube. [0004] During heat exchange, the high-temperature furnace gas drawn from the reaction furnace and the circulating waste acid used for rolling steel plates enter the Venturi tube at the same time for heat exchange...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D47/10F28C3/08
Inventor 徐众蒋光炜刘福军王溪刚陶春山
Owner BENXI IRON & STEEL GROUP
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