Method for heating acid washing solution

A heating method and pickling technology, which are used in the pickling process of hot-rolled strips in the cold rolling industry and the field of pickling solution heating, which can solve the problem of increasing the burden on the acid mist purification system, reducing the pickling speed, and corrosion of equipment and workshop steel structures. And other issues
CN102995040AInactive Publication Date: 2013-03-27TIANJIN YIBO STEEL MAKING
5 Cites 24 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN YIBO STEEL MAKING
Publication Date
2013-03-27
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a method for heating acid washing solution. The method comprises: (1) the acid washing solution in an acid washing tank 1 flows back into an acid circulation tank 2, is filtered through a filter 3 and is pumped into a heater 6 by an acid-resistant pump 4 through an inlet 5 of the heater, the heated acid washing solution is pumped into the acid washing tank 1 through an outlet 7 of the heater to form circulation, and the circulation is repeated in the way; (2) heating steam enters through a steam inlet 8 and is discharged through a steam outlet 9, so that the acid washing solution is kept at normal technological temperature all the time; and (3) acid mist which is generated during the acid washing process is concentrated through a mist collector 10 under the action of a mist exhaust fan 12 and enters an acid mist purification system 11 to be purified, and the mist which meets the emission standards is discharged to the atmosphere 13 through the mist exhaust fan 12. By the method, heat exchange is indirectly realized, the acid washing solution cannot be diluted, excessive acid mist is not generated, the acid mist cannot be leaked during the heat exchange process, and the heating process of the acid washing solution and the temperature of the acid washing solution can be automatically controlled through adopting a heat exchanger.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to an auxiliary method for the production process of the cold rolling industry, in particular to a method for heating a pickling solution, which is suitable for the pickling process of hot-rolled strips in the cold rolling industry. Background technique

[0002] At present, before the cold rolling of the hot-rolled carbon structural steel strip, it is necessary to clean the oxide scale on the surface of the hot-rolled strip through a pickling process. In the pickling process, sulfuric acid pickling mainly relies on mechanical stripping to remove scale; hydrochloric acid pickling mainly relies on dissolution to remove scale. In order to speed up the pickling speed, improve the pickling quality, and adapt to modern large-scale production, it is necessary to heat the pickling solution to a certain temperature. The higher the temperature of the pickling solution, the stronger the activity and the shorter the pickling time. The sulfur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More