[Soda Ash Knowledge] Question of the Day (139) February 28, 2010

Since a portion of the refined brine coming from the brine treatment section enters the filtration ammonia scrubber, another portion enters the ammonia absorption scrubber, and most of it goes into the carbonation off-gas scrubbing tower; after absorbing NH3 and CO2, all of it then flows to the top of the ammonia absorption tower to absorb the upward-flowing ammonia gas. The ammonia gas from ammonia stripping enters the bottom section of the ammonia absorption tower. After NH3 and CO2 are absorbed by the brine, the off-gas exits from the top of the tower and enters the lower section for ammonia absorption and purification. The remaining ammonia in the gas is then absorbed by the brine in the ammonia absorber-purifier. Finally, the off-gas is evacuated via a vacuum pump. The brine after being absorbed by the bacterial cap in the absorption tower enters an external cooler, where it is cooled before flowing back to the ammonia absorber so that the bacterial cap can absorb ammonia gas. A portion of the ammonia brine discharged from the bottom ring of the ammonia absorber is recirculated; it flows by gravity into the recirculating ammonia brine tank, is pumped to a cooler for cooling, and then returned to the bottom ring of the ammonia absorber ； The other portion enters the ammonium brine clarification tank; together with the ammonium brine overflowing from the upper part, it flows by gravity to a cooler, where it is cooled to below 40 degrees Celsius before returning to the ammonium brine storage tank. It is then pumped to the carbonation washing tower. The ammonia-salt cement discharged from the bottom of the tank is sent for ammonia recovery.

A portion of the refined brine coming from the brine section enters the filtration ammonia scrubber, another portion enters the ammonia absorption scrubber, and most of it goes into the carbonation off-gas scrubbing tower. After absorbing NH3 and CO2, it all flows to the top of the ammonia absorption tower to absorb the upward-flowing ammonia gas. The ammonia gas originating from ammonia distillation enters the lower section of the ammonia absorption tower. Once NH3 and CO2 are absorbed by the brine, the off-gas exits from the top of the tower and enters the lower section of the ammonia scrubber, where any remaining ammonia in the gas is absorbed by the brine. Finally, the off-gas is evacuated via a vacuum pump. Meanwhile, the brine that has undergone absorption through the bacterial caps in the absorption tower is cooled in an external cooler before flowing back to the bacterial cap section of the ammonia absorber to absorb more ammonia gas. A portion of the ammonia brine discharged from the bottom ring of the ammonia absorber is used for recirculation; it flows by gravity into the recirculating ammonia brine storage tank. The ammonia brine overflowing from the top also flows by gravity to a cooler, where it is cooled to below 40 degrees Celsius before returning to the storage tank. From there, it is pumped to the carbonation washing tower. Meanwhile, the ammonia brine sludge discharged from the bottom of the tank is sent for ammonia recovery

Answer: Part of the refined brine coming from the brine section enters the filtration ammonia scrubber, while another part goes into the ammonia absorption scrubber. The majority enters the carbonation off-gas scrubbing tower; after absorbing NH3 and CO2, it all reaches the top of the ammonia absorption tower to absorb the ammonia gas rising from below. The ammonia gas from ammonia stripping enters the bottom section of the ammonia absorption tower. After NH3 and CO2 are absorbed by the brine, the off-gas exits from the top of the tower and enters the bottom section of the ammonia purification tower. The remaining ammonia in the gas is then absorbed by the brine in the ammonia absorber/purifier. Finally, the exhaust gas is evacuated by a vacuum pump. The brine, after being absorbed by the bacterial cap in the absorption tower, enters an external cooler where it is cooled, and then flows back to the bacterial cap ring of the nitrogen absorber to absorb ammonia. Part of the ammonia-containing brine discharged from the bottom ring of the ammonia absorber is used for circulation; it flows automatically into the circulating ammonia-brine storage tank, and after being cooled by a pump, it returns to the bottom ring of the ammonia absorber ； Another portion enters the ammoniated brine clarifier; together with the ammoniated water overflowing from the upper part, it flows by gravity to a cooler where it is cooled to below 40°C, then returns to the ammoniated brine storage tank and is pumped to the carbonation washing tower. The ammonia-salt cement discharged from the bottom of the tank is sent for ammonia recovery. The process flow diagram is omitted.

The typical process is as follows: Part of the refined brine coming from the brine section enters the filtration ammonia scrubber, while another portion goes into the ammonia absorption scrubber. The majority enters the carbonation off-gas scrubbing tower; after absorbing NH3 and CO2, it all reaches the top of the ammonia absorption tower to absorb the upward-flowing ammonia gas. The ammonia gas from ammonia stripping enters the bottom section of the ammonia absorption tower. After NH3 and CO2 are absorbed by the brine, the off-gas exits from the top of the tower and enters the lower section for ammonia absorption and purification. The remaining ammonia in the gas is then absorbed by the brine in the ammonia absorber-purifier. Finally, the off-gas is evacuated via a vacuum pump. The brine after being absorbed by the bacterial cap in the absorption tower enters an external cooler, where it is cooled before flowing back to the ammonia absorber so that the bacterial cap can absorb ammonia gas. A portion of the ammonia brine discharged from the bottom ring of the ammonia absorber is recirculated; it flows by gravity into the recirculating ammonia brine tank, is pumped to a cooler for cooling, and then returned to the bottom ring of the ammonia absorber ； The other portion enters the ammonium brine clarification tank; together with the ammonium brine overflowing from the upper part, it flows by gravity to a cooler, where it is cooled to below 40 degrees Celsius before returning to the ammonium brine storage tank. It is then pumped to the carbonation washing tower. The ammonia-salt cement discharged from the bottom of the tank is sent for ammonia recovery.

Part of the refined brine coming from the brine section enters the filtration ammonia scrubber, while another part goes into the ammonia absorption scrubber. The majority enters the carbonation off-gas scrubbing tower; after absorbing NH3 and CO2, it all flows to the top of the ammonia absorption tower to absorb the upward-flowing ammonia gas. The ammonia gas from ammonia stripping enters the bottom section of the ammonia absorption tower. After NH3 and CO2 are absorbed by the brine, the off-gas exits from the top of the tower and enters the bottom section of the ammonia scrubbing tower, where any remaining ammonia in the gas is absorbed by the brine. Finally, the exhaust gas is discharged through a vacuum pump. After being absorbed by the bacterial cap in the absorption tower, the brine flows back to the bacterial cap ring of the ammonia absorber, where it absorbs ammonia gas after being cooled in an external cooler. A portion of the ammonia brine discharged from the bottom ring of the ammonia absorber is used for recirculation; it flows by gravity into the recirculated ammonia brine storage tank, and is then pumped to a cooler for cooling before being returned to the bottom ring of the absorber ； The other portion enters the ammonia-brine clarifier. The ammonia brine overflowing from the top flows by gravity to a cooler, where it is cooled to below 40 degrees Celsius. It then returns to the ammonia-brine storage tank and is pumped to the carbonation washing tower. The ammonia-salt cement discharged from the bottom of the tank is sent for ammonia recovery.

Part of the refined brine coming from the brine section enters the filtration ammonia scrubber, while another part goes into the ammonia absorption scrubber. The majority enters the carbonation off-gas scrubbing tower; after absorbing NH3 and CO2, it all flows to the top of the ammonia absorption tower to absorb the upward-flowing ammonia gas. The ammonia gas from ammonia stripping enters the bottom section of the ammonia absorption tower. After NH3 and CO2 are absorbed by the brine, the off-gas exits from the top of the tower and enters the bottom section of the ammonia scrubbing tower, where any remaining ammonia in the gas is absorbed by the brine. Finally, the exhaust gas is discharged through a vacuum pump. After being absorbed by the bacterial cap in the absorption tower, the brine flows back to the bacterial cap ring of the ammonia absorber, where it absorbs ammonia gas after being cooled in an external cooler. A portion of the ammonia brine discharged from the bottom ring of the ammonia absorber is used for recirculation; it flows by gravity into the recirculated ammonia brine storage tank, and is then pumped to a cooler for cooling before being returned to the bottom ring of the absorber ； The other portion enters the ammonia-brine clarifier. The ammonia brine overflowing from the top flows by gravity to a cooler, where it is cooled to below 40 degrees Celsius. It then returns to the ammonia-brine storage tank and is pumped to the carbonation washing tower. The ammonia-salt cement discharged from the bottom of the tank is sent for ammonia recovery.

Part of the refined brine coming from the brine treatment section passes through the filtration ammonia scrubber, while another part enters the ammonia absorption scrubber. The majority enters the carbonation off-gas scrubber; after absorbing ammonia and carbon dioxide, it all flows to the top of the ammonia absorption tower to absorb the upward-flowing ammonia gas. The ammonia gas from ammonia stripping enters the bottom section of the ammonia absorption tower. After ammonia and carbon dioxide are absorbed by the brine, the off-gas exits from the top of the tower and enters the bottom section of the ammonia scrubbing tower. The remaining ammonia in the gas is then absorbed by the brine in the ammonia absorber. Finally, the exhaust gas is evacuated by a vacuum pump. The brine, after being absorbed by the biofilm in the absorption tower, enters an external cooler for cooling, and then flows back to the biofilm ring of the ammonia absorber to absorb ammonia gas. A portion of the ammonia brine discharged from the bottom ring of the ammonia absorber is recirculated; it flows by gravity into the recirculation ammonia brine storage tank, is pumped to a cooler for cooling, and then returned to the bottom ring of the ammonia absorber ； Another portion enters the ammonia salt water clarification tank; the ammonia salt water that overflows from the upper part flows by gravity to a cooler where it is cooled to below 40°C, then returns to the ammonia salt water storage tank before being pumped to the carbonation cleaning tower. The ammonia-salt cement discharged from the bottom of the tank is sent for ammonia recovery.

Short-answer questions: 1. Taking the purification of brine by the lime-soda process and the primary intercooling outside the tower as examples, briefly describe the process flow of ammonia absorption. Answer: Part of the refined brine coming from the brine section enters the filtration ammonia scrubber, while another part goes into the ammonia absorption scrubber. The majority enters the carbonation off-gas washing tower; after absorbing NH3 and CO2, it all reaches the top of the ammonia absorption tower to absorb the ammonia gas flowing downward. Ammonia gas coming from ammonia stripping enters the bottom section of the ammonia absorption tower. There, NH3 and CO2 are absorbed by brine. The off-gas exits from the top of the tower and enters the bottom section of the ammonia absorption tower. The remaining ammonia in the gas is absorbed by brine in the ammonia absorber. Finally, the exhaust gas is evacuated by a vacuum pump. The brine, after being absorbed by the bacterial cap in the absorption tower, enters an external cooler where it is cooled; it then flows back to the bacterial cap ring of the nitrogen absorber to absorb ammonia gas. A portion of the ammonia brine discharged from the bottom ring of the ammonia absorber is used for recirculation; it flows by gravity into the recirculated ammonia brine storage tank, and after being cooled by a cooler via a pump, it is returned to the bottom ring of the ammonia absorber. The other portion enters the ammonia brine clarification tank; together with the ammonia brine overflowing from the upper part, it flows by gravity to a cooler where it is cooled to below 40°C, then returns to the ammonia brine storage tank and is pumped to the carbonation washing tower. The ammonia-salt cement discharged from the bottom of the tank is sent for ammonia recovery.

Since a portion of the refined brine coming from the brine treatment section enters the filtration ammonia scrubber, another portion enters the ammonia absorption scrubber, and most of it goes into the carbonation off-gas scrubbing tower; after absorbing NH3 and CO2, all of it then flows to the top of the ammonia absorption tower to absorb the upward-flowing ammonia gas. The ammonia gas from ammonia stripping enters the bottom section of the ammonia absorption tower. After NH3 and CO2 are absorbed by the brine, the off-gas exits from the top of the tower and enters the lower section for ammonia absorption and purification. The remaining ammonia in the gas is then absorbed by the brine in the ammonia absorber-purifier. Finally, the off-gas is evacuated via a vacuum pump. The brine after being absorbed by the bacterial cap in the absorption tower enters an external cooler, where it is cooled before flowing back to the ammonia absorber so that the bacterial cap can absorb ammonia gas. A portion of the ammonia brine discharged from the bottom ring of the ammonia absorber is recirculated; it flows by gravity into the recirculating ammonia brine tank, is pumped to a cooler for cooling, and then returned to the bottom ring of the ammonia absorber ； The other portion enters the ammonium brine clarification tank; together with the ammonium brine overflowing from the upper part, it flows by gravity to a cooler, where it is cooled to below 40 degrees Celsius before returning to the ammonium brine storage tank. It is then pumped to the carbonation washing tower. The ammonia-salt cement discharged from the bottom of the tank is sent for ammonia recovery.

Answer: Part of the refined brine coming from the brine section enters the filtration ammonia scrubber, while another part goes into the ammonia absorption scrubber. The majority enters the carbonation off-gas washing tower; after absorbing NH3 and CO2, it all reaches the top of the ammonia absorption tower to absorb the ammonia gas rising from below. The ammonia gas from ammonia stripping enters the bottom section of the ammonia absorption tower. After NH3 and CO2 are absorbed by the brine, the off-gas exits from the top of the tower and enters the bottom section of the ammonia scrubbing tower, where any remaining ammonia in the gas is absorbed by the brine. Finally, the exhaust gas is discharged through a vacuum pump. After being absorbed by the bacterial cap in the absorption tower, the brine flows back to the bacterial cap ring of the ammonia absorber, where it absorbs ammonia gas after being cooled in an external cooler. A portion of the ammonia brine discharged from the bottom ring of the ammonia absorber is used for recirculation; it flows by gravity into the recirculated ammonia brine storage tank, and is then pumped to a cooler for cooling before being returned to the bottom ring of the absorber ； The other portion enters the ammonia-brine clarifier. The ammonia brine overflowing from the top flows by gravity to a cooler, where it is cooled to below 40 degrees Celsius. It then returns to the ammonia-brine storage tank and is pumped to the carbonation washing tower. The ammonia-salt cement discharged from the bottom of the tank is sent for ammonia recovery. 1# 9067jxhuas