| Items | Index | |
| Appearance | White crystalline powder | |
| Sodium Formate % ≥ | 98 | 95 |
| Sodium Chloride (NaCl) % ≤ | 0.20 | 0.20 |
| Organic matter % ≤ | 1.0 | 4.0 |
| Iron (Fe)% ≤ | 0.005 | 0.005 |
| Moisture % ≤ | 1.0 | 2.0 |
Using coke as raw material, the carbon monoxide gas by the process is obtained through the processes of gas generation and dust removal, water washing, decarbonization, and dust removal. After heating and pressurizing, it reacts with sodium hydroxide to form a sodium formate solution, and then evaporates, separates, and dries to form a solid product, sodium formate.
Prepare gas
Lift the coke to the upper part of the gas-making furnace with an electric hoist, and add coke to the furnace from the mouth of the gas-making furnace. Incomplete combustion of coke in the furnace and the air brought in by the fan produce mixed gases such as carbon monoxide, carbonate dioxide, and nitrogen.
Purify
The mixed gas from the gas generator enters the cyclone dust collector, and most of the small solid particles entrained by the mixed gas enter the scrubber. The scrubber uses water as the washing liquid to further remove the solid particles in the mixed gas, and then enters the alkali washing tower, using sodium hydroxide solution as the circulating absorption liquid. Part of the carbon dioxide gas in the mixed gas is removed, and then the moisture entrained in the gas is separated by a hydrocyclone. Then enter the electrostatic precipitator, remove the remaining small solid particles through static electricity, and purify the mixed gas again.
Compression
The purified mixed gas enters the compressor for two-stage compression, and the pressure is raised to 2.0-2.2Mpa. In enter the mixer through the oil-water separator and mixes with the lye from the preheater. Under a certain temperature and pressure, the lye reacts with most of the carbon dioxide gas, and obtains the carbon monoxide gas required for the process.
Desulfurization
In the production of sodium formate, the commonly used desulfurization method is zinc oxide method. Zinc oxide is a contact reaction type desulfurizer with large inner surface and high sulfur capacity, which can be used as a single desulfurizer.
Synthesis
Heat the generated monoxide gas and nitrogen to 140℃-150℃ to enter the synthesis reactor. In the synthesis reactor, carbon monoxide reacts with sodium hydroxide to form sodium formate solution. The mixture of sodium formate solution, nitrogen and trace carbon monoxide gas is decompressed and then enters the hydrocyclone for gas-liquid separation. The sodium formate solution is pumped into the storage tank for use, and the mixed gas is discharged into the atmosphere.
Evaporative separation
The sodium formate solution in the storage tank is pumped to the evaporator, and most of the water is evaporated to form sodium formate solution with a content of 70%-80%. Then it is pumped to the centrifuge, and the centrifuge to get solid sodium formate.
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