CN102502718B - Carbonization crystallization technology in process for producing sodium carbonate through Hou's method - Google Patents
Carbonization crystallization technology in process for producing sodium carbonate through Hou's method Download PDFInfo
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- CN102502718B CN102502718B CN 201110354767 CN201110354767A CN102502718B CN 102502718 B CN102502718 B CN 102502718B CN 201110354767 CN201110354767 CN 201110354767 CN 201110354767 A CN201110354767 A CN 201110354767A CN 102502718 B CN102502718 B CN 102502718B
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Abstract
The invention relates to a carbonization crystallization technology in the process for producing sodium carbonate through a Hou's method. The technology is characterized in that the technology comprises the following steps: sending an ammonia II mother solution to a carbonization cleaning tower, and countercurrent-contacting and reacting with a cleaning gas output by a sodium carbonate preparation tower to precarbonize; injecting a precarbonization solution to a cleaning pump connected to the carbonization cleaning tower to clean the cycle of the carbonization cleaning tower; sending the precarbonization solution taken from the bottom of the carbonization cleaning tower to a primary crystallizer, cooling the precarbonization solution by allowing it to go through a primary cooler, allowing it to go through a collection tank and then return to the primary crystallizer, sending the generated crystal slurry to a primary thickener by the primary crystallizer to thick, and centrifuging; sending the obtained overflow solution to the soda preparation tower, and countercurrent-contacting and reacting with a transformation gas to prepare soda; sending the solution from the soda preparation tower to a secondary crystallizer, crystallizing again, thickening again, and separating again; and sending parts of the overflow solution to the soda preparation tower, and contacting with the transformation gas to carry out cycle soda preparation. The technology of the invention, which adopts above two-time carbonization two-time crystallization external-cooling process, allows the crystallization residence time of the carbonization tower to be prolonged, the carbonization conversion rate to be improved, the working time of the carbonization tower to be prolonged and the production capacity of the carbonization tower to be increased.
Description
Technical field
The present invention relates to the carbonization crystallization processes in a kind of the alkaline process soda ash production technique, particularly a kind of procedure of producing soda under joint alkaline process.
Background technology
Carbonation process is in traditional soda ash production process: send the carbonization cleaning tower with ammonia II mother liquor earlier, react with the purgative gas counter current contact that washing tower (for removing CO2) processed comes out, to reach pre-carbonization and to clean purpose, the cleaning tower tail gas discharged gas scavenging tower that truncates, cleaning tower bottom take out by in and pumping washing tower (for removing CO2) processed and conversion gas react in washing tower (for removing CO2) processed middle and upper part counter current contact, to reach carbonization alkali purpose processed, getting magma taking-up liquid through washing tower (for removing CO2) processed bottom cooling water tank crystallisation by cooling again send heavy alkali whizzer to filter, the filter cake that separates send calcination system by conveyor, and filtrate is removed female I bucket.There is following defective in this carbonization technique: adopt the inner-cooled carbonating tower, make the carbonating tower useful volume diminish, shortened the carburizing reagent residence time, reduced carbonating tower throughput; The carbonization transformation efficiency of existing carbonization technique also is restricted; Certainly will carbonating tower be to enlarge if will improve its throughput, its facility investment expense and equipment installation difficulty so then increased.In addition, partial crystallization is not effectively separated in the cleaning tower taking-up liquid; Carbonating tower causes the cooling tubulation not get effective washing because reaction is all finished in carbonating tower inside with cooling simultaneously, causes carbonating tower to boil the operation of tower in the very short cycle, and environmental protection is had certain influence.
Summary of the invention
Technical problem to be solved by this invention is at the deficiencies in the prior art, provide a kind of technology more rationally, effectively to improve the carbonization transformation efficiency, increase the carbonization output of column, solve the carbonization crystallization processes in the procedure of producing soda under joint alkaline process of environmental issue that carbonating tower boils tower.
Technical problem to be solved by this invention is to realize by following technical scheme.The present invention is the carbonization crystallization processes in a kind of procedure of producing soda under joint alkaline process, is characterized in, its step is as follows:
(1) ammonia II mother liquor is delivered to the carbonization cleaning tower, with the purgative gas counter current contact reaction of washing tower (for removing CO2) output processed, carry out pre-carbonization, get pre-carbodiimide solution; The tail gas that the carbonization cleaning tower is discharged exports the tail gas clean-up tower to; The scavenging pump that is connected with on the carbonization cleaning tower is beaten pre-carbodiimide solution carbonization cleaning tower circulation is cleaned;
(2) the pre-carbodiimide solution that carbonization cleaning tower bottom is taken out is delivered to the primary crystallization device, deliver to water cooler and water coolant heat exchange cooling by first propeller pump then, return the primary crystallization device through aggregate groove, the magma that generates is taken out by primary crystallization device middle part and send stiff device stiff one time, a stiff device bottom is taken out magma and is sent once heavy alkali whizzer to separate, filter cake send calcination system, and filtrate is sent female I bucket; The primary crystallization device, one time stiff device overflowing liquid is delivered to mother vat one time, by in and pumping washing tower (for removing CO2) processed and the conversion circulation of vital energy in the wrong direction flow contact reacts alkali processed;
(3) washing tower (for removing CO2) bottom taking-up liquid processed send the secondary crystal device, liquid be will take out by second propeller pump and recooler and water coolant heat exchange cooling delivered to, cooling is returned the secondary crystal device by second aggregate groove, the magma that generates is taken out by secondary crystal device middle part and send secondary stiff device stiff, secondary stiff device bottom is taken out magma and is sent the heavy alkali whizzer of secondary to separate, filter cake send calcination system, and filtrate is removed female I bucket; The secondary crystal device, secondary stiff device overflowing liquid is delivered to the secondary mother liquid bucket, and part contacts circulation alkali processed by alkali circulation pumping processed washing tower (for removing CO2) processed with conversion circulation of vital energy in the wrong direction stream, and part is pumped to female I bucket by female I.
Compared with prior art, the present invention has the following advantages:
1, the present invention adopts carbonization tower cooled externally, makes the carbonating tower useful volume become big, has prolonged the carburizing reagent residence time, has improved the carburizing reagent transformation efficiency.Existing technology is advanced tower AII(ammonia II) CNH
3About 42 t t, take out CNH
3About 82tt, △ CNH then
3Be 40tt.Adopt technology of the present invention to advance tower AII CNH
3About 35tt, take out CNH
3About 85tt, △ CNH then
3Be 50tt.This shows, adopt technology of the present invention can improve carbonization transformation efficiency 25%, namely the mother liquor equivalent reduces by 25%, has reduced the energy consumption of production system indirectly.
2,, adopt external-cooling type technology of the present invention not have inner cooling tubulation, avoided scabbing of carbonating tower tubulation, thereby caused the phenomenon of boiling tower, stop the tower that boils of carbonating tower, the emission problem of no waste water has solved the problem of environmental protection.
3, adopted this technology after because cooling is not to carry out in carbonating tower inside, so solved the device fabrication problem that carbonating tower maximizes, single tower ability can improve about about 50%.
4, cleaning tower of the present invention is taken out in the liquid partial crystallization separations of further lowering the temperature, and the mother liquor of high-quality both was provided for washing tower (for removing CO2) processed, can obtain the carbonating tower crystallization of high-quality again, divides to the heavy buck of subsequent production and reduces the raising support.
5, cleaning tower of the present invention has been equipped with the clean cycle pump and cleaning tower is carried out pump circulation cleans, effectively dissolving tower wall scabs, prolonged the carbonating tower activity duration, simultaneously, washing tower (for removing CO2) processed has been equipped with alkali recycle pump processed, crystallizer and stiff device overflow clear liquid are beaten to washing tower (for removing CO2) circulation processed alkali processed, reduced the mother liquor equivalent.
Description of drawings
Fig. 1 is process flow diagram of the present invention.
Embodiment
Following with reference to accompanying drawing, further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not constitute the restriction to its right.
Embodiment 1, with reference to Fig. 1, and the carbonization crystallization processes in a kind of procedure of producing soda under joint alkaline process, its step is as follows:
(1) ammonia II mother liquor is delivered to carbonization cleaning tower 1, with the purgative gas counter current contact reaction of washing tower (for removing CO2) 2 outputs processed, carry out pre-carbonization, get pre-carbodiimide solution; The tail gas that carbonization cleaning tower 1 is discharged exports the tail gas clean-up tower to; 3 dozens of pre-carbodiimide solutions of the scavenging pump that is connected with on the carbonization cleaning tower 1 circulate to carbonization cleaning tower 1 and clean;
(2) the pre-carbodiimide solution that carbonization cleaning tower 1 bottom is taken out is delivered to primary crystallization device 4, delivering to a water cooler 6 by first propeller pump 5 then lowers the temperature with the water coolant heat exchange, return primary crystallization device 4 through aggregate groove 7, the magma that generates is taken out by primary crystallization device 4 middle parts and send stiff device 8 stiffs one time, stiff device 8 bottoms are taken out magma and are sent once heavy alkali whizzer 9 to separate, filter cake send calcination system, and filtrate is sent female I bucket; 4, stiff device 8 overflowing liquids of primary crystallization device are delivered to mother vat 10 one time, by in and pump 11 send washing tower (for removing CO2) processed 2 and the conversion circulation of vital energy in the wrong direction to flow contact reacts alkali processed;
(3) washing tower (for removing CO2) 2 bottoms taking-up liquid processed send secondary crystal device 12, liquid be will take out by second propeller pump 13 and recooler 14 and water coolant heat exchange cooling delivered to, cooling is returned secondary crystal device 12 by second aggregate groove 15, the magma that generates is taken out by secondary crystal device 12 middle parts and send secondary stiff device 16 stiffs, secondary stiff device 16 bottoms are taken out magma and are sent the heavy alkali whizzer 17 of secondary to separate, filter cake send calcination system, and filtrate is removed female I bucket; Secondary crystal device 12, secondary stiff device 16 overflowing liquids are delivered to secondary mother liquid bucket 18, and part send washing tower (for removing CO2) 2 processed to contact circulation alkali processed with conversion circulation of vital energy in the wrong direction stream by alkali recycle pump 19 processed, and part is delivered to female I bucket by female I pump 20.
Claims (1)
1. the carbonization crystallization processes in the procedure of producing soda under joint alkaline process is characterized in that its step is as follows:
(1) ammonia II mother liquor is delivered to carbonization cleaning tower (1), with the purgative gas counter current contact reaction of washing tower (for removing CO2) processed (2) output, carry out pre-carbonization, get pre-carbodiimide solution; The tail gas that carbonization cleaning tower (1) is discharged exports the tail gas clean-up tower to; The scavenging pump (3) that is connected with on the carbonization cleaning tower (1) is beaten pre-carbodiimide solution carbonization cleaning tower (1) circulation is cleaned;
(2) the pre-carbodiimide solution that carbonization cleaning tower (1) bottom is taken out is delivered to primary crystallization device (4), deliver to a water cooler (6) and water coolant heat exchange cooling by first propeller pump (5) then, return primary crystallization device (4) through aggregate groove (7), the magma that generates is taken out by primary crystallization device (4) middle part and send a stiff device (8) stiff, a stiff device (8) bottom is taken out magma and is sent once heavy alkali whizzer (9) to separate, filter cake send calcination system, and filtrate is sent female I bucket; Primary crystallization device (4), a stiff device (8) overflowing liquid are delivered to a mother vat (10), by in and pump (11) send washing tower (for removing CO2) processed (2) and the conversion circulation of vital energy in the wrong direction stream contact reacts alkali processed;
(3) washing tower (for removing CO2) processed (2) bottom is taken out liquid and is sent secondary crystal device (12), liquid be will take out by second propeller pump (13) and recooler (14) and water coolant heat exchange cooling delivered to, cooling is returned secondary crystal device (12) by second aggregate groove (15), the magma that generates is taken out by secondary crystal device (12) middle part and send secondary stiff device (16) stiff, secondary stiff device (16) bottom is taken out magma and is sent the heavy alkali whizzer of secondary (17) to separate, filter cake send calcination system, and filtrate is removed female I bucket; Secondary crystal device (12), secondary stiff device (16) overflowing liquid are delivered to secondary mother liquid bucket (18), and part send washing tower (for removing CO2) processed (2) to contact circulation alkali processed with conversion circulation of vital energy in the wrong direction stream by alkali recycle pump processed (19), and part is delivered to female I bucket by female I pump (20).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110354767 CN102502718B (en) | 2011-11-10 | 2011-11-10 | Carbonization crystallization technology in process for producing sodium carbonate through Hou's method |
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| CN 201110354767 CN102502718B (en) | 2011-11-10 | 2011-11-10 | Carbonization crystallization technology in process for producing sodium carbonate through Hou's method |
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| CN102502718B true CN102502718B (en) | 2013-07-17 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698427B (en) * | 2016-02-15 | 2017-12-08 | 赵祥海 | Workshop section's lithium bromide refrigerating cooling and the hot ammonia I mother liquors cleaning device of Outer Cooler and method are crystallized in procedure of producing soda under joint alkaline process |
| CN106276982A (en) * | 2016-10-19 | 2017-01-04 | 中盐昆山有限公司 | Soda and sociation center novel environment friendly circulation technology system and method |
| CN106586960A (en) * | 2016-12-20 | 2017-04-26 | 杨皓 | Process for soda ash production through converted gas pressure swing adsorption and ammonia water combined decarbonization |
| CN108358220B (en) * | 2018-03-07 | 2023-05-23 | 武汉德泽环保科技有限公司 | Method and device for producing baking soda |
| CN109133114A (en) * | 2018-10-26 | 2019-01-04 | 中盐昆山有限公司 | Cold carbonization Tower System and its operating method outside five one group of tower formulas |
| CN112694105B (en) * | 2021-01-13 | 2023-11-17 | 河南中源化学股份有限公司 | High-efficiency carbonization reaction system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059883A (en) * | 1991-10-05 | 1992-04-01 | 化工部制碱工业研究所 | Produce the method and apparatus of sodium bicarbonate |
| US5270023A (en) * | 1992-10-30 | 1993-12-14 | May Frank H | Process for producing sodium carbonate, sodium bicarbonate and associated compounds |
| EP1900688A1 (en) * | 2006-09-14 | 2008-03-19 | SOLVAY (Société Anonyme) | Method for obtaining sodium carbonate crystals |
| CN101992015A (en) * | 2009-08-14 | 2011-03-30 | 钟少军 | Method for sequestering carbon dioxide |
-
2011
- 2011-11-10 CN CN 201110354767 patent/CN102502718B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059883A (en) * | 1991-10-05 | 1992-04-01 | 化工部制碱工业研究所 | Produce the method and apparatus of sodium bicarbonate |
| US5270023A (en) * | 1992-10-30 | 1993-12-14 | May Frank H | Process for producing sodium carbonate, sodium bicarbonate and associated compounds |
| EP1900688A1 (en) * | 2006-09-14 | 2008-03-19 | SOLVAY (Société Anonyme) | Method for obtaining sodium carbonate crystals |
| CN101992015A (en) * | 2009-08-14 | 2011-03-30 | 钟少军 | Method for sequestering carbon dioxide |
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