Stainless steel pickling mixed waste acid liquid pretreatment system and technology
A waste acid solution and pretreatment technology, applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of reducing free acid recovery, increasing operation and maintenance workload, and regenerating unit equipment. Damage and other problems, to reduce cleaning operations and maintenance work, improve automation, and avoid damage to the pump
Inactive Publication Date: 2018-01-16
WISDRI ENG & RES INC LTD
View PDF2 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
If these waste acids enter the mixed acid regeneration unit directly, it will cause damage to the equipment of the regeneration unit, blockage of pipelines, etc., which will greatly affect the stability of the system, increase the workload of operation and maintenance, and reduce the service life of the equipment.
[0003] In order to prevent the sludge from damaging the regeneration system, this part of the acid-containing sludge is usually discharged directly to the wastewater treatment station for neutralization treatment. This method of treatment is not conducive to the recovery of metal oxides, but also reduces waste acid. Recovery of free acid, and at the same time, it is easy to cause nitrogen oxides to exceed the standard in the process of wastewater discharge
Method used
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
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0034] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0035] It should be noted that, in the description of the present invention, the terms "horizontal", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention.
[0036] refer to figure 1 , in this preferred embodiment, a stainless steel mixed acid pickling waste acid ...
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 PUM
Login to view more Abstract
The invention discloses a stainless steel pickling mixed waste acid liquid pretreatment system. The stainless steel pickling mixed waste acid liquid pretreatment system comprises a graphite cooler, amixing tank, a settling tank, a press filter, a pretreated acid collecting tank and a high-pressure rinsing device, wherein the graphite cooler is used for cooling waste acid liquid; the mixing tank is provided with a stirring device, and an inlet of the mixing tank is connected with an outlet of the graphite cooler so as to flocculate the cooled waste acid liquid; an inlet of the settling tank isconnected with an outlet of the mixing tank so as to perform solid-liquid separation on the waste acid liquid; an inlet of the press filter is connected with a sludge outlet of the settling tank so as to filter sludge for further solid-liquid separation; an inlet of the pretreated acid collecting tank is connected with a waste acid liquid outlet of the settling tank and a waste acid liquid outletof the press filter so as to collect the pretreated waste acid liquid; and an inlet of the high-pressure rinsing device is connected with industrial water, and an outlet of the high-pressure rinsingdevice is connected with the inlet of the press filter to rinse a filtered sludge cake so as to reduce the acid content of the sludge cake. The stainless steel pickling mixed waste acid liquid pretreatment system provided by the invention increases the recycling rate of free acid in the waste acid liquid, and facilitates recycling of metal oxide.
Description
technical field [0001] The invention relates to the technical field of waste acid recovery, in particular to a stainless steel mixed acid pickling waste acid liquid pretreatment system and a process thereof. Background technique [0002] Iron and steel enterprises or stainless steel processing enterprises use a mixture of nitric acid and hydrofluoric acid to treat the surface of stainless steel (chromium and chromium-nickel gold), special-purpose alloys (such as nickel-based alloys) or special metals (such as titanium, zirconium) plates and bars. Pickling is carried out to remove the iron oxide scale on the metal surface to meet the requirements of metal material processing. This waste acid solution is usually treated and acid regeneration by spray roasting mixed acid regeneration unit. However, the waste acid solution often contains a large amount of metal oxide sludge, especially the content of metal oxide sludge in the waste acid solution of the hot rolling mill is very ...
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 Application Information
Patent Timeline
Login to view more Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F11/12C02F103/16
Inventor 赵海高俊峰
Owner WISDRI ENG & RES INC LTD
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap