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Serial number Project name Patent type Issuing unit Issue time: 1 A no-power makerup airsystem in confined space Utility Model Patent CNIPA 2018; 2 A drying device for ammonium phosphate slurry Utility Model Patent CNIPA 2018; 3 An emergency treatment device of ammonia gas discharging through relief valve on liquid ammonia tank Utility Model Patent CNIPA 2016; 4 A cyclone dust collector and its chain sweeper Utility Model Patent CNIPA 2016; 5 A tail gas purification device of exhaust gas from sulphur melting Utility Model Patent CNIPA 2016; 6 A defluorination and neutralization device using phosphorus containing wastewater to produce feed grade calcium hydrophosphate Utility Model Patent CNIPA 2016; 7 Exhaust gas treatment system of yellow phosphorus slag flushing sump Utility Model Patent CNIPA 2016; 8 A portable strong sulphuric acid filtering device Utility Model Patent CNIPA 2016; 9 A heat recovery device for DAP ammonium phosphate production Utility Model Patent CNIPA 2016; 10 Internal scrubbing system in the spray drying tower of ammonium dihydrogen phosphate Utility Model Patent CNIPA 2016; 11 A cooling device for sodium fluosilicate substrate Utility Model Patent CNIPA 2016; 12 A short-web device for yellow phosphorus electric furnace Utility Model Patent CNIPA 2016

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