CN100391844C - Process of producing ammonium nitrate with exhausted gas from synthetic ammonia freezing system - Google Patents
Process of producing ammonium nitrate with exhausted gas from synthetic ammonia freezing system Download PDFInfo
- Publication number
- CN100391844C CN100391844C CNB2006100129450A CN200610012945A CN100391844C CN 100391844 C CN100391844 C CN 100391844C CN B2006100129450 A CNB2006100129450 A CN B2006100129450A CN 200610012945 A CN200610012945 A CN 200610012945A CN 100391844 C CN100391844 C CN 100391844C
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- Prior art keywords
- ammonia
- ice maker
- ammonium nitrate
- gas
- water cooler
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Abstract
The method of recovering the exhausted gas from freezing system in synthetic ammonia production is to feed the exhausted gas to ammonium nitrate neutralizer for reacting with nitric acid to produce ammonium nitrate solution, rather than to feed the exhausted gas to ammonia purifying system for recovering ammonia. The method of the present invention can reduce the exhaust pressure of the freezing system and reduce the electric load of the freezing system.
Description
Technical field
The present invention relates to the production of synthetic ammonia, particularly relate to the recovery method that the refrigeration system generation is dropped a hint in the Ammonia Production.The present invention will drop a hint and be directly used in the production of ammonium nitrate, to replace utilizing clean ammonia system to reclaim the processing method of ammonia originally.
Background technology
The technical process of refrigeration system is in the tradition Ammonia Production: the gas ammonia that liquefied ammonia evaporates in synthetic ammonia workshop section ammonia cooler internal cooling hydrogen nitrogen mixed cycle gas process send freezing workshop section, after the ice maker pressurization, send the ice maker water cooler to cool off again, after the gas ammonia liquefaction, enter the liquefied ammonia storage tank from the bottom of ice maker water cooler, recycle for synthetic ammonia workshop section ammonia cooler.
Since contain a spot of solution gas in the liquefied ammonia, after ammonia cooler evaporation, ice maker compression, the cooling of ice maker water cooler, incondensable gas (H
2, N
2, CH
4) can in the ice maker water cooler, assemble, make the refrigeration system superpressure, so design is the gas phase UNICOM of ice maker water cooler and liquefied ammonia storage tank, with intrasystem noncondensable gas emptying, to keep system's pressure-stabilisation.
Contain a large amount of ammonias in the dropping a hint of refrigeration system, can not directly discharge, can only send into clean ammonia system, gas ammonia is made ammoniacal liquor reclaim, use after sending the desorb of urea workshop section, residual gas then send the Gas-making Furnace burning.
The problem that above technology exists is: the emptying amount of ice maker water cooler is big, especially in summer, the emptying amount is bigger, making clean ammonia system produce ammonia vol increases, and directly influences the line balancing of urea on the one hand, gives urea production, particularly desorb workshop section brings difficulty, on the other hand, the power load of ice maker is increased, energy consumption increases.
For the technical process of some Ammonia Production urea while coproduction ammonium nitrate or bicarbonate of ammonia, all be to use the preceding gas ammonia of ice maker import as unstripped gas.Traditional theory is thought, reduces ice maker import gas ammonia amount, the power load that can save ice maker.Yet actual production process is found, reduces the power load that ice maker import gas ammonia amount does not reduce ice maker effectively, has only the refrigeration system of reduction top hole pressure, is only the effective way of reduction ice maker power load.
Summary of the invention
The purpose of this invention is to provide a kind of method of utilizing exhausted gas from synthetic ammonia freezing system to produce ammonium nitrate, to reduce the refrigeration system top hole pressure effectively, reduce the ice maker power load, simultaneously not with the clean ammonia system of emptying pneumatic transmission, do not produce ammoniacal liquor, reduce urea production desorb workshop section load.
For achieving the above object, the method that the present invention adopts is to send refrigeration system with the gas ammonia that cooling hydrogen nitrogen mixed cycle gas in the ammonia cooler evaporates, after the ice maker pressurization, in the ice maker water cooler, be cooled to liquefied ammonia, send in the liquefied ammonia storage tank, recycle the gas phase UNICOM of ice maker water cooler and liquefied ammonia storage tank for ammonia cooler, dropping a hint of producing directly sent in the ammonium nitrate neutralizer, with nitric acid reaction to produce ammonium nitrate solution.
After adopting processing method of the present invention, can cause the increase of refrigeration system ice maker import load, if the ice maker water cooler is still kept original 1.55～1.6MPa/cm
2Back pressure, not only can increase the power load of refrigeration system, even and dropping a hint of will producing all be sent to the ammonium nitrate neutralizer, can not satisfy the demand of ammonium nitrate production usefulness gas.Therefore, the present invention has adopted the way that reduces the refrigeration system back pressure, and the back pressure of ice maker water cooler is adjusted into 1.1～1.3MPa/cm
2, one side has strengthened the emptying tolerance of refrigeration system, has satisfied the demand of ammonium nitrate production usefulness gas, greatly reduces the power load of ice maker on the one hand.
The present invention is directly used in the production of ammonium nitrate with dropping a hint of refrigeration system generation, to replace utilizing clean ammonia system to reclaim the processing method of ammonia originally, solved because of ice maker water cooler emptying amount big, clean ammonia system produces ammonia vol to be increased, influence the urea production balanced contradiction, also reduce the top hole pressure of refrigeration system effectively, reduced the power load of ice maker.
Description of drawings
Fig. 1 is that the present invention utilizes exhausted gas from synthetic ammonia freezing system to produce the process flow sheet of ammonium nitrate.
Embodiment
Liquefied ammonia from the liquefied ammonia storage tank feeds in the synthetic ammonia workshop section ammonia cooler, after the air cooling but of hydrogen nitrogen mixed cycle, the gas ammonia that evaporates all send refrigeration system, after the ice maker pressurization, in the ice maker water cooler, be cooled to liquefied ammonia, send into the liquefied ammonia storage tank from the bottom, recycle for ammonia cooler, insufficient section is replenished by the big storage tank of liquefied ammonia.
The gas phase UNICOM of ice maker water cooler and liquefied ammonia storage tank is used for the incondensable gas emptying that will accumulate in the ice maker water cooler.Drop a hint and directly send in the ammonium nitrate neutralizer, with nitric acid reaction to produce ammonium nitrate solution, through evaporation, Crystallization Procedure, form ammonium nitrate product, wherein a spot of H
2, N
2And CH
4Deng gas emptying after the nitric acid washing.
With 240,000 t/ synthetic ammonia installations is example, synthetic ammonia gas production rate 100,000 m
3/ h, ammonium nitrate output 3.5t/h, former refrigeration system explained hereafter condition is: ice maker import pressure 0.15MPa/cm
2, ice maker water cooler back pressure 1.55MPa/cm
2, ice maker electric current 100A produces ammoniacal liquor 1m winter
3/ h; Produce ammoniacal liquor 3m summer
3/ h.
Refrigeration system production technique of the present invention is: ice maker import pressure 0.15MPa/cm
2, winter: 10～15 ℃ of ice maker water cooler coolant water temperatures, ice maker water cooler back pressure 1.15MPa/cm
2, open several 2 of ice maker platform, ice maker electric current 70A; Summer: 20～25 ℃ of ice maker water cooler coolant water temperatures, ice maker water cooler back pressure 1.3MPa/cm
2, open several 3 of ice maker platform, ice maker electric current 80A.
Claims (2)
1. utilize exhausted gas from synthetic ammonia freezing system to produce the method for ammonium nitrate, be that the gas ammonia that cooling hydrogen nitrogen mixed cycle gas in the ammonia cooler evaporates is delivered to refrigeration system, after the ice maker pressurization, in the ice maker water cooler, be cooled to liquefied ammonia, send in the liquefied ammonia storage tank and store, recycle for ammonia cooler, the gas phase UNICOM and the emptying of ice maker water cooler and liquefied ammonia storage tank is characterized in that:
Dropping a hint that ice maker water cooler and liquefied ammonia storage tank produce directly sent in the ammonium nitrate neutralizer, with nitric acid reaction to produce ammonium nitrate solution.
2. the method for utilizing exhausted gas from synthetic ammonia freezing system to produce ammonium nitrate according to claim 1, the back pressure that it is characterized in that the ice maker water cooler is 1.1～1.3MPa/cm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100129450A CN100391844C (en) | 2006-07-12 | 2006-07-12 | Process of producing ammonium nitrate with exhausted gas from synthetic ammonia freezing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100129450A CN100391844C (en) | 2006-07-12 | 2006-07-12 | Process of producing ammonium nitrate with exhausted gas from synthetic ammonia freezing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1887707A CN1887707A (en) | 2007-01-03 |
| CN100391844C true CN100391844C (en) | 2008-06-04 |
Family
ID=37576987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100129450A Expired - Fee Related CN100391844C (en) | 2006-07-12 | 2006-07-12 | Process of producing ammonium nitrate with exhausted gas from synthetic ammonia freezing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100391844C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109160523A (en) * | 2018-11-09 | 2019-01-08 | 陕西黑猫焦化股份有限公司 | A kind of gas ammonia prepares the system and method for ammonium hydroxide |
| CN109612202A (en) * | 2018-12-28 | 2019-04-12 | 山东润银生物化工股份有限公司 | A method of synthesis ammonia circulating air condenses and separates liquefied ammonia |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0277901A1 (en) * | 1987-01-21 | 1988-08-10 | Union Explosivos Rio Tinto, S.A. | Process and installation for the production of ammonium nitrate |
| CN1456504A (en) * | 2003-05-09 | 2003-11-19 | 湖北宜化化工股份有限公司 | Wast heat recovering and utilizing method for ammonia synthesis |
-
2006
- 2006-07-12 CN CNB2006100129450A patent/CN100391844C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0277901A1 (en) * | 1987-01-21 | 1988-08-10 | Union Explosivos Rio Tinto, S.A. | Process and installation for the production of ammonium nitrate |
| CN1456504A (en) * | 2003-05-09 | 2003-11-19 | 湖北宜化化工股份有限公司 | Wast heat recovering and utilizing method for ammonia synthesis |
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| Publication number | Publication date |
|---|---|
| CN1887707A (en) | 2007-01-03 |
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Granted publication date: 20080604 |