CN104591222A - Synthetic ammonia device ammonia hydroxide concentrating method - Google Patents
Synthetic ammonia device ammonia hydroxide concentrating method Download PDFInfo
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- CN104591222A CN104591222A CN201510015723.3A CN201510015723A CN104591222A CN 104591222 A CN104591222 A CN 104591222A CN 201510015723 A CN201510015723 A CN 201510015723A CN 104591222 A CN104591222 A CN 104591222A
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- ammonia
- ammoniacal liquor
- concentration
- washing
- normal pressure
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Abstract
The invention discloses a synthetic ammonia device ammonia hydroxide concentrating method which comprises the following steps: 1) conveying a part of the ammonia hydroxide which is generated by a membrane recovery ammonia washing device and has a concentration of 7-9% to a normal-pressure ammonia washing device at a flow of 1.6 T/h, and washing in the normal-pressure ammonia washing device to increase the concentration; 2) conveying the ammonia hydroxide in the normal-pressure ammonia washing device in the step 1) to a low-pressure ammonia washing device and washing the high-concentration ammonia-containing medium to increase the concentration to 17-18%; and 3) mixing the ammonia hydroxide of the low-pressure ammonia washing device in the step 2) with the residual 1.4 t/h ammonia hydroxide of the membrane recovery ammonia washing device and sending the mixture to an ammonia hydroxide storage tank, wherein the concentration of the mixture is 14-15%. According to the synthetic ammonia device ammonia hydroxide concentrating method provided by the invention, the desalted water dosage of the normal-pressure ammonia washing device and the low-pressure ammonia washing device can be decreased. Through step-by-step concentration, the concentration of the ammonia hydroxide can be up to 15% so as to achieve the concentration required by the customers, increase the enterprise income and improve the economic benefit.
Description
Technical field
The present invention relates to synthesis ammonia system ammonia treatment technology, specifically a kind of synthetic ammonia installation ammoniacal liquor concentrating method.
Technical background
At present, in synthesis ammonia system ammonia treatment, be utilize film to reclaim Ammonic washing tower, normal pressure Ammonic washing tower and low pressure Ammonic washing tower three cover to wash ammonia equipment, produce ammoniacal liquor and all directly put into Ammonia vessel, ammonia concn is low, and the de-salted water consumption that normal pressure washes ammonia device and low pressure Ammonic washing tower is large.Because ammonia concn is too low, client does not need lower concentration ammoniacal liquor, also needs to spend to ask someone lower concentration ammoniacal liquor to pull away process, adds enterprise cost.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, a kind of synthetic ammonia installation ammoniacal liquor concentrating method is provided.Employing the method can by ammoniacal liquor concentrate, and reduce the usage quantity of de-salted water, gained ammoniacal liquor can also as production marketing.
Realizing technical scheme of the present invention is: a kind of synthetic ammonia installation ammoniacal liquor concentrating method, comprises the steps,
1) concentration 7% ~ 9% ammoniacal liquor part that Membrane recovery unit MRU produces is sent to normal pressure and washes ammonia device, its flow is 1.6T/h, washes in ammonia device wash at normal pressure, and concentration is increased;
2) normal pressure in step 1) is washed ammoniacal liquor in ammonia device and be sent to low ammonia device washing high density of compressing and washing again containing ammonia solution, make concentration rise to 17% ~ 18%;
3) by step 2) mesolow wash ammonia device ammoniacal liquor and the remaining 1.4t/h of Membrane recovery unit MRU ammoniacal liquor mixing after be sent to Ammonia vessel, its concentration is 14% ~ 15%.
Described step 2), 3) in gas ammonia is washed with de-salted water normal pressure, low compressing and washing in ammonia device.
Described normal pressure washes ammonia device, low ammonia process of washing of compressing and washing in ammonia device is iterative cycles washing in respective device, then discharges when reaching prescribed concentration.
Described Membrane recovery unit MRU is that film reclaims Ammonic washing tower.
It is normal pressure Ammonic washing tower that described normal pressure washes ammonia device.
The described low ammonia device that compresses and washes is low pressure Ammonic washing tower.
The invention has the beneficial effects as follows:
1, decrease normal pressure and wash ammonia device and the low de-salted water consumption compressing and washing ammonia device.
2, ammonia concn is too low before, and client does not need lower concentration ammoniacal liquor, and oneself need spend to ask someone lower concentration ammoniacal liquor to pull away process.Now by step by step concentration, ammonia concn can reach 15%, reaches customer demand concentration, and ammoniacal liquor per ton can buy about 150 yuan, improves economic benefit.
Accompanying drawing explanation
Fig. 1 be prior art wash ammonia schematic diagram;
Fig. 2 of the present inventionly washes ammonia schematic diagram.
Number in the figure: 1-film reclaims Ammonic washing tower, and 2-normal pressure Ammonic washing tower, 3-low pressure Ammonic washing tower, 4-Ammonia vessel, 5-normal pressure washes ammonia.
Embodiment
As shown in Figure 1, a kind of synthetic ammonia installation ammoniacal liquor concentrating method, comprises the steps,
1) film is reclaimed the 8% ammoniacal liquor part that Ammonic washing tower 1 produces and be sent to normal pressure Ammonic washing tower 2, its flow is about 1.6T/h, after washing ammonia-containing gas, concentration is increased in normal pressure Ammonic washing tower 2;
2) ammoniacal liquor in normal pressure Ammonic washing tower 2 in step 1) is sent to low pressure Ammonic washing tower 3 again and washs high density containing ammonia solution, it is 18% that concentration is increased;
3) be sent to Ammonia vessel 4 after step 1) mesolow Ammonic washing tower 3 ammoniacal liquor and film being reclaimed the ammoniacal liquor mixing of the remaining 1.4t/h of Ammonic washing tower 1, its concentration is about 15%.
Above-mentioned steps 2), 3) middle de-salted water washs gas ammonia in normal pressure Ammonic washing tower 2, low pressure Ammonic washing tower 3.
Described synthetic ammonia film reclaims and washes ammonia device is a set of environmental protecting device, mainly processes the gas ammonia contained in ammonia synthesis operation tail gas, and recover hydrogen.The method removing gas ammonia is washed gas ammonia in Ammonic washing tower with de-salted water, and the ammonia concn produced after washing is 7% ~ 9%, is 3t/h, reduces during load shedding with load condition during the full production of washing water flow.
Described normal pressure washes ammonia device for washing in particular cases, and as equipment emptying, safety valve jumping up, Liquid Ammonia Filling Station sell the ammonia-containing gas that ammonia tail gas etc. produces, concentration is lower at ordinary times.Normally use pump self-circulation repeated washing.
Described low compress and wash ammonia device be washing pressure at below 0.6MPa containing ammonia solution, main wash is the gas ammonia of liquefied ammonia letdown tank at ordinary times, and concentration is higher.Usually be also with pump self-circulation washing.
Claims (6)
1. a synthetic ammonia installation ammoniacal liquor concentrating method, is characterized in that: comprise the steps,
1) concentration 7% ~ 9% ammoniacal liquor part of film recovery being washed ammonia device generation is sent to normal pressure and washes ammonia device, and its flow is 1.6T/h, washes in ammonia device wash at normal pressure, and concentration is increased;
2) normal pressure in step 1) is washed ammoniacal liquor in ammonia device and be sent to low ammonia device washing high density of compressing and washing again containing ammonia solution, make concentration rise to 17% ~ 18%;
3) by step 2) mesolow washes after ammonia device ammoniacal liquor and film reclaim the ammoniacal liquor mixing of washing the remaining 1.4t/h of ammonia device and is sent to Ammonia vessel, and its concentration is 14% ~ 15%.
2. synthetic ammonia installation ammoniacal liquor concentrating method according to claim 1, is characterized in that: described step 2), 3) in gas ammonia is washed with de-salted water normal pressure, low compressing and washing in ammonia device.
3. synthetic ammonia installation ammoniacal liquor concentrating method according to claim 1, is characterized in that: described normal pressure washes ammonia device, low ammonia process of washing of compressing and washing in ammonia device is iterative cycles washing in respective device, then discharges when reaching prescribed concentration.
4. synthetic ammonia installation ammoniacal liquor concentrating method according to claim 1, is characterized in that: described film reclaims and washes ammonia device is that film reclaims Ammonic washing tower.
5. synthetic ammonia installation ammoniacal liquor concentrating method according to claim 1, is characterized in that: it is normal pressure Ammonic washing tower that described normal pressure washes ammonia device.
6. synthetic ammonia installation ammoniacal liquor concentrating method according to claim 1, is characterized in that: the described low ammonia device that compresses and washes is low pressure Ammonic washing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510015723.3A CN104591222B (en) | 2015-01-13 | 2015-01-13 | A kind of synthetic ammonia installation ammonia concentrating method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510015723.3A CN104591222B (en) | 2015-01-13 | 2015-01-13 | A kind of synthetic ammonia installation ammonia concentrating method |
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| CN104591222A true CN104591222A (en) | 2015-05-06 |
| CN104591222B CN104591222B (en) | 2016-08-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428820A (en) * | 2008-12-06 | 2009-05-13 | 李大路 | Process for recycling liquid ammonia from coke oven gas |
| CN102153107A (en) * | 2010-11-29 | 2011-08-17 | 山东三和化工有限公司 | Process method for thickening thin ammonia water |
| JP4838826B2 (en) * | 2008-05-27 | 2011-12-14 | オルガノ株式会社 | Fluorine and ammonia recovery device and recovery method |
| CN103936030A (en) * | 2013-07-12 | 2014-07-23 | 贵州兴化化工股份有限公司 | Aqua ammonia refining concentration method |
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2015
- 2015-01-13 CN CN201510015723.3A patent/CN104591222B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4838826B2 (en) * | 2008-05-27 | 2011-12-14 | オルガノ株式会社 | Fluorine and ammonia recovery device and recovery method |
| CN101428820A (en) * | 2008-12-06 | 2009-05-13 | 李大路 | Process for recycling liquid ammonia from coke oven gas |
| CN102153107A (en) * | 2010-11-29 | 2011-08-17 | 山东三和化工有限公司 | Process method for thickening thin ammonia water |
| CN103936030A (en) * | 2013-07-12 | 2014-07-23 | 贵州兴化化工股份有限公司 | Aqua ammonia refining concentration method |
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| CN104591222B (en) | 2016-08-17 |
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