Recycling method for ammonia, concentration measurement method for mono-ammonium phosphate solution, and concentration control method for mon-oammonium phosphate solution
The invention discloses a recycling method for ammonia, a concentration measurement method for mono-ammonium phosphate solution, and a concentration control method for mono-ammonium phosphate solution. In the recycling method for ammonia, a phosphate acid solution with weight percent concentration f...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a recycling method for ammonia, a concentration measurement method for mono-ammonium phosphate solution, and a concentration control method for mono-ammonium phosphate solution. In the recycling method for ammonia, a phosphate acid solution with weight percent concentration from 1 to 85% is used as chemical reagents so that the ammonia and the chemical reagents can have a batch/continuous reaction to produce a mono-ammonium phosphate solution with weight percent concentration from 1 to 36.8%, thus to obtain a high concentration mono-ammonium phosphate solution. In the concentration measurement method for the mono-ammonium phosphate solution, pH value of the mono-ammonium phosphate solution, or pH value and electric conductivity of the mono-ammonium phosphate solution, can determine whether weight percent concentration of the mono-ammonium phosphate solution does match a preset value or not. The concentration control method for the mono-ammonium phosphate solution includes the steps of: |
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