1、Process features
1.1Continuous and automatic production process
1.2The excess gas process is adopted in the front stage of synthesis to ensure the complete reaction of caustic soda and the finished product purity is more than 98.8%. The latter stage adopts the excess caustic soda process to ensure the complete gas reaction.
1.3
2、Process description
CO gas source: a. produced by coke or coal gas, b. ammonia analytical gas, c. carbide tail gas, d. yellow phosphorus tail gas, e. other gases containing CO.
2.1、After purification and compression, CO is mixed with caustic soda solution.
2.2、Caustic soda, water and centrifugal mother liquor are prepared into caustic soda solution of specified concentration, which is lifted by centrifugal pump and mixed with gas.
2.3、Gas-liquid mixture enters the tubular reactor and reacts at 1.3-2.0Mpa and 150-190 ℃ to form a dilute sodium formate solution of sodium formate.
CO + NaOH = HCOONa
2.4、The dilute sodium formate solution enters the diluent storage tank, is pumped into the sodium formate concentrator, and is concentrated by 2 stages to obtain the concentrated sodium formate suspension containing crystal.
2.5、The suspension is centrifuged by a centrifuge, the mother liquor is reused, and the solids enter the dryer. After drying, the finished sodium formate is obtained.
Process flow chart
3、Quality assurance and consumption index
3.1Sodium formate quality standard
3.2 consumption list
4、Treatment for “3 wastes”
4.1Waste water: no waste water generated in this technology.
4.2Waste gas:waste gas comes from the synthetic tail gas, mainly composed of N2 and a small amount of other non condensable gases, which are discharged after cooling.
4.3Solid waste: no solid waste generated in this technology.
1.1Continuous and automatic production process
1.2The excess gas process is adopted in the front stage of synthesis to ensure the complete reaction of caustic soda and the finished product purity is more than 98.8%. The latter stage adopts the excess caustic soda process to ensure the complete gas reaction.
1.3
2、Process description
CO gas source: a. produced by coke or coal gas, b. ammonia analytical gas, c. carbide tail gas, d. yellow phosphorus tail gas, e. other gases containing CO.
2.1、After purification and compression, CO is mixed with caustic soda solution.
2.2、Caustic soda, water and centrifugal mother liquor are prepared into caustic soda solution of specified concentration, which is lifted by centrifugal pump and mixed with gas.
2.3、Gas-liquid mixture enters the tubular reactor and reacts at 1.3-2.0Mpa and 150-190 ℃ to form a dilute sodium formate solution of sodium formate.
CO + NaOH = HCOONa
2.4、The dilute sodium formate solution enters the diluent storage tank, is pumped into the sodium formate concentrator, and is concentrated by 2 stages to obtain the concentrated sodium formate suspension containing crystal.
2.5、The suspension is centrifuged by a centrifuge, the mother liquor is reused, and the solids enter the dryer. After drying, the finished sodium formate is obtained.
Process flow chart
3、Quality assurance and consumption index
3.1Sodium formate quality standard
| Item | Unit | Index(guarantee) |
| Sodium formate mass percentage | % | ≥98.8 |
| NaOH mass percentage | % | ≤0.1 |
| Na2CO3 mass percentage | % | ≤0.1 |
| moisture | % | ≤0.6 |
| NaCl mass percentage | % | ≤0.05 |
| Na2S mass percentage | % | ≤0.005 |
| No. | Item | Unit | consumption quota | |
| expectation | guarantee | |||
| 1 | CO | Nm3 | 328（reduce moisture） | 328（reduce moisture） |
| 2 | caustic soda(reduce moisture) | t | 0.583 | 0.583 |
| 3 | Power 380V | kwh | 50 | 50 |
| 4 | steam 0.8MPa | t | 1.9 | 1.9 |
| 5 | tap water | t | 1 | 1 |
4.1Waste water: no waste water generated in this technology.
4.2Waste gas:waste gas comes from the synthetic tail gas, mainly composed of N2 and a small amount of other non condensable gases, which are discharged after cooling.
4.3Solid waste: no solid waste generated in this technology.
