Process for extracting calcium chloride from waste incineration fly ash
A waste incineration fly ash and calcium chloride technology, applied in the direction of alkali metal chloride, calcium/strontium/barium chloride, calcium/strontium/barium halide, etc., can solve the problem of low economic value and high processing cost of calcium carbonate , comprehensive operating costs and other issues, to achieve the effect of reducing operating costs, reducing processing costs, and reducing equipment investment
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0038] Example 1
[0039] 1) Use evaporative condensed water as washing water to carry out countercurrent washing for waste incineration fly ash three times, and then separate the washed aqueous solution into solid-liquid to obtain dechlorinated ash residue and washing water.
[0040] 2), adding a heavy metal removal agent to the washing water, and performing solid-liquid separation again to remove heavy metal precipitation.
[0041] 3), adding hydrochloric acid to adjust the pH value to pH=7, and then sending it to the subsequent evaporation process.
[0042] 4), evaporating concentrated solution, to the calcium chloride concentration of concentrated solution is concentrated to 40% (wt.), sodium chloride and potassium chloride crystallization, adopt the solid mixed salt of filtering solid-liquid separation sodium chloride, potassium chloride and calcium chloride solution. The condensed water obtained when the concentrated liquid is evaporated is returned to step 1 for reuse...
Example Embodiment
[0044] Example 2
[0045] 1) Use evaporative condensed water as washing water to carry out countercurrent washing for waste incineration fly ash three times, and then separate the washed aqueous solution into solid-liquid to obtain dechlorinated ash residue and washing water.
[0046] 2), adding a heavy metal removal agent to the washing water, and performing solid-liquid separation again to remove heavy metal precipitation.
[0047] 3), adding hydrochloric acid to adjust the pH value to pH=8, and then sending it to the subsequent evaporation process.
[0048] 4), evaporate concentrated solution, to the calcium chloride concentration of concentrated solution is concentrated to 38% (wt.), sodium chloride and potassium chloride crystallization, adopt the solid mixed salt of filtering solid-liquid separation sodium chloride, potassium chloride and calcium chloride solution. The condensed water obtained when the concentrated liquid is evaporated is returned to step 1 for reuse a...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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