CN103833049A - Device and process for stilling ammonia with negative pressure - Google Patents
Device and process for stilling ammonia with negative pressure Download PDFInfo
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- CN103833049A CN103833049A CN201410115857.8A CN201410115857A CN103833049A CN 103833049 A CN103833049 A CN 103833049A CN 201410115857 A CN201410115857 A CN 201410115857A CN 103833049 A CN103833049 A CN 103833049A
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- ammonia still
- water cooler
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Abstract
The invention discloses a device and process for stilling ammonia with negative pressure, and belongs to the ammonia stilling technology. The device comprises an ammonia stilling tower, a total condenser, an ammonia cooler, a reflux tank, and an ammonia water reflux pump, which are connected in sequence; one path of the outlet end of the ammonia water reflux pump is connected with the ammonia stilling tower and while the other path of the outlet end of the ammonia water flux pump is used for transferring to the outside; the reflux tank, a non-condensable gas cooler and a vacuum injection pump form a circulation loop; and the vacuum injection pump is also connected with a gas pipeline. The process comprises the following steps of: performing ammonia stilling for vacuum circulating ammonia water; cooling the ammonia; transferring the obtained ammonia water into the reflux tank; cooling the non-condensable gas; transferring into the reflux tank to circulate under the effect of the vacuum injection pump; refluxing the first part the ammonia water produced in the reflux tank, transferring the second part of the ammonia water to the outside as a finished product, and circulating the third part of the ammonia water as circulating liquid; and then feeding the un-absorbed tail gas into the gas pipeline. With the adoption of the device and process for stilling ammonia with the negative pressure, the vacuum condition for negative-pressure ammonia stilling can be effectively realized, so that the negative-pressure operation can be carried out; in addition, the quality of ammonia is improved, the operation cost is low, the labor intensity is small, and other characteristics are also brought.
Description
Technical field
The present invention relates to a kind of ammonia still process technology, especially a kind of device and technique of the negative pressure ammonia still process that is widely used in coking, chemical industry.
Background technology
At coking industry, ammonia still process is replaced by negative pressure ammonia still process gradually by normal pressure ammonia still process, and negative pressure ammonia still process distillation heat reduces, obvious energy conservation.According to measuring and calculating, the negative pressure ammonia still process of identical scale is compared with normal pressure ammonia still process, and energy efficient can reach 40%-60%, is extremely conducive to industry energy conservation consumption reduction, reduces costs; Cleaner production, reduces the generation of waste water, and generally, while adopting open steam distillation, a large amount of steam condensates can enter waste water system, increases the weight of the load of biochemical treatment.
Current most negative pressure ammonia evaporation system all adopts high pressure spraying water generates vacuum, also needs some support equipments, ensures the quality of recirculated water.So not only increase facility investment, increased working cost simultaneously.
At present, the solution also not had.
Summary of the invention
Technical assignment of the present invention is device and the technique that a kind of negative pressure ammonia still process is provided for above-mentioned deficiency of the prior art, the device of this kind of negative pressure ammonia still process and technique have not only can realize the needed vacuum condition of negative pressure ammonia still process effectively, realize negative-pressure operation, and can put forward the quality of ammonia vapour, compared with using water as circulation fluid device, simple for process, running cost is low, labour intensity is little, is worth feature universal and that promote.
The technical solution adopted for the present invention to solve the technical problems is:
A device for negative pressure ammonia still process, it comprises ammonia still, complete condenser, ammonia vapour water cooler, backflash, ammoniacal liquor reflux pump, non-condensable gas water cooler and vacuum jet pump; Described ammonia still, complete condenser, ammonia vapour water cooler, backflash are connected successively with ammoniacal liquor reflux pump; The exit end of described ammoniacal liquor reflux pump divides two-way, and a road is connected with ammonia still, and another road is sent outside; Described backflash top is provided with non-condensable gas water cooler, between described backflash, non-condensable gas water cooler and vacuum jet pump, forms a circulation loop, and described vacuum jet pump is also connected with gas line.
A kind of technique of negative pressure ammonia still process, comprise the following steps: vacuum cycle ammoniacal liquor enters and in ammonia still, carries out ammonia still process, after ammonia still process, ammonia still top ammonia vapour enters complete condenser and ammonia vapour water cooler carries out cooling, the ammoniacal liquor of cooling rear formation enters backflash, in backflash, condensing does not enter non-condensable gas water cooler, after non-condensable gas water cooler cooling, under the suction producing at vacuum jet pump, entering backflash circulates, the ammoniacal liquor part forming in backflash is returned stream through ammoniacal liquor reflux pump, beat and reflux to ammonia still top, a part is sent outside as finished product, a part circulates as the circulation fluid of vacuum jet pump, produce vacuum, maintaining backflash pushes up in negative pressure state, unabsorbed tail gas part is overflowed and is entered gas line.
Compared to the prior art the device of a kind of negative pressure ammonia still process of the present invention and technique, have following outstanding beneficial effect: reduced the investment of equipment, reduced working cost; Solve the wastewater problem that circulation fluid produces; Ammoniacal liquor, as circulation fluid, has absorbed the ammonia in non-condensable gas, has improved the concentration of the ammoniacal liquor of ammonia still process production; Tail gas absorbs flushing liquor without second distillation, saves ammonia still process production cost.
Brief description of the drawings
Accompanying drawing 1 is a kind of device and process schematic representation of negative pressure ammonia still process.
Embodiment
Device and technique with reference to Figure of description 1 to a kind of negative pressure ammonia still process of the present invention are described in detail below.
A device for negative pressure ammonia still process, it comprises ammonia still, complete condenser, ammonia vapour water cooler, backflash, ammoniacal liquor reflux pump, non-condensable gas water cooler and vacuum jet pump; Described ammonia still, complete condenser, ammonia vapour water cooler, backflash are connected successively with ammoniacal liquor reflux pump; The exit end of described ammoniacal liquor reflux pump divides two-way, and a road is connected with ammonia still, and another road is sent outside; Described backflash top is provided with non-condensable gas water cooler, between described backflash, non-condensable gas water cooler and vacuum jet pump, forms a circulation loop, and described vacuum jet pump is also connected with gas line.
A kind of technique of negative pressure ammonia still process, comprise the following steps: vacuum cycle ammoniacal liquor enters and in ammonia still, carries out ammonia still process, after ammonia still process, ammonia still top ammonia vapour enters complete condenser and ammonia vapour water cooler carries out cooling, the ammoniacal liquor of cooling rear formation enters backflash, in backflash, condensing does not enter non-condensable gas water cooler, after non-condensable gas water cooler cooling, under the suction producing at vacuum jet pump, entering backflash circulates, the ammoniacal liquor part forming in backflash is returned stream through ammoniacal liquor reflux pump, beat and reflux to ammonia still top, a part is sent outside as finished product, a part circulates as the circulation fluid of vacuum jet pump, produce vacuum, maintaining backflash pushes up in negative pressure state, unabsorbed tail gas part is overflowed and is entered gas line.
The vacuum exhaust of ammonia still is extracted out and is entered non-condensable gas water cooler by tower top complete condenser, ammonia vapour water cooler, backflash, enter vacuum jet pump, part ammonia vapour in non-condensable gas is dissolved in and sprays with in cyclic ammonia water, and residual exhaust is before offgas duct enters desulfurization in negative pressure gas line.Vacuum jet pump adopts mother liquor ammonia circulation formula, does circulation fluid with mother liquor aqueous ammonia to replace water.Vacuum cycle ammoniacal liquor send finished product ammonia vessel after reaching setting concentration containing ammonia, supplements afterwards ammoniacal liquor again.
The present invention is specially adapted to the ammonia still process of coking industry remained ammonia and produces the recovery of strong aqua technique.The core technology of this invention is that the airless injection principle of utilizing mother liquor to produce as circulation fluid realizes the object of ammonia still process low in calories, and then has realized negative pressure ammonia still process, without independent device for recovering tail gas, saves cost of investment and ammonia still process processing cost.This method is applicable to negative pressure ammonia still process recovery process, has good environmental benefit, economic benefit and social benefit.
Except the technical characterictic described in specification sheets, be the known technology of those skilled in the art.
Claims (2)
1. a device for negative pressure ammonia still process, is characterized in that: comprise ammonia still, complete condenser, ammonia vapour water cooler, backflash, ammoniacal liquor reflux pump, non-condensable gas water cooler and vacuum jet pump; Described ammonia still, complete condenser, ammonia vapour water cooler, backflash are connected successively with ammoniacal liquor reflux pump; The exit end of described ammoniacal liquor reflux pump divides two-way, and a road is connected with ammonia still, and another road is sent outside; Described backflash top is provided with non-condensable gas water cooler, between described backflash, non-condensable gas water cooler and vacuum jet pump, forms a circulation loop, and described vacuum jet pump is also connected with gas line.
2. the technique of a negative pressure ammonia still process, it is characterized in that: comprise the following steps: vacuum cycle ammoniacal liquor enters and in ammonia still, carries out ammonia still process, after ammonia still process, ammonia still top ammonia vapour enters complete condenser and ammonia vapour water cooler carries out cooling, the ammoniacal liquor of cooling rear formation enters backflash, in backflash, condensing does not enter non-condensable gas water cooler, after non-condensable gas water cooler cooling, under the suction producing at vacuum jet pump, entering backflash circulates, the ammoniacal liquor part forming in backflash is returned stream through ammoniacal liquor reflux pump, beat and reflux to ammonia still top, a part is sent outside as finished product, a part circulates as the circulation fluid of vacuum jet pump, produce vacuum, maintaining backflash pushes up in negative pressure state, unabsorbed tail gas part is overflowed and is entered gas line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410115857.8A CN103833049A (en) | 2014-03-26 | 2014-03-26 | Device and process for stilling ammonia with negative pressure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410115857.8A CN103833049A (en) | 2014-03-26 | 2014-03-26 | Device and process for stilling ammonia with negative pressure |
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| CN103833049A true CN103833049A (en) | 2014-06-04 |
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| CN201410115857.8A Pending CN103833049A (en) | 2014-03-26 | 2014-03-26 | Device and process for stilling ammonia with negative pressure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104998519A (en) * | 2015-06-29 | 2015-10-28 | 天津市天地创智科技发展有限公司 | Ammonia gas absorption device for tert-butyl alcohol reduced pressure recovery tower and ammonia gas absorption method |
| CN105413406A (en) * | 2015-12-27 | 2016-03-23 | 安徽淮化股份有限公司 | Recycling system of ammonia gas in emptying tail gas and operation method therefor |
| CN105836760A (en) * | 2016-03-17 | 2016-08-10 | 山东钢铁股份有限公司 | Method and system for producing ammonia water from salt extracting waste steam of HPF-process desulfurization liquid with ammonia as alkali source |
| CN106673012A (en) * | 2016-11-11 | 2017-05-17 | 中冶焦耐(大连)工程技术有限公司 | Process and device for producing strong ammonia water through negative pressure operation |
| CN106745062A (en) * | 2017-01-23 | 2017-05-31 | 中冶焦耐(大连)工程技术有限公司 | The technique and device of a kind of negative-pressure operation production concentrated ammonia liquor |
| CN112611253A (en) * | 2020-12-01 | 2021-04-06 | 内蒙古金石镁业有限公司 | Automatic cleaning device for cooler and cleaning control method thereof |
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| CN103159376A (en) * | 2013-02-21 | 2013-06-19 | 张玲 | Negative pressure ammonia steaming process method of using coking circulating ammonia water waste heat to dispose residual ammonia water |
| CN103570090A (en) * | 2013-10-25 | 2014-02-12 | 安阳市恒威石化设备有限责任公司 | Negative-pressure ammonia stilling system in coking plant and negative-pressure ammonia stilling process method |
| CN203768044U (en) * | 2014-03-26 | 2014-08-13 | 济钢集团有限公司 | Negative-pressure ammonia distilling device |
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| CN103159376A (en) * | 2013-02-21 | 2013-06-19 | 张玲 | Negative pressure ammonia steaming process method of using coking circulating ammonia water waste heat to dispose residual ammonia water |
| CN103570090A (en) * | 2013-10-25 | 2014-02-12 | 安阳市恒威石化设备有限责任公司 | Negative-pressure ammonia stilling system in coking plant and negative-pressure ammonia stilling process method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104998519A (en) * | 2015-06-29 | 2015-10-28 | 天津市天地创智科技发展有限公司 | Ammonia gas absorption device for tert-butyl alcohol reduced pressure recovery tower and ammonia gas absorption method |
| CN104998519B (en) * | 2015-06-29 | 2017-04-12 | 天津市天地创智科技发展有限公司 | Ammonia gas absorption device for tert-butyl alcohol reduced pressure recovery tower and ammonia gas absorption method |
| CN105413406A (en) * | 2015-12-27 | 2016-03-23 | 安徽淮化股份有限公司 | Recycling system of ammonia gas in emptying tail gas and operation method therefor |
| CN105413406B (en) * | 2015-12-27 | 2017-10-24 | 安徽淮化股份有限公司 | The recovery system and its operating method of gas ammonia in a kind of emptying end gas |
| CN105836760A (en) * | 2016-03-17 | 2016-08-10 | 山东钢铁股份有限公司 | Method and system for producing ammonia water from salt extracting waste steam of HPF-process desulfurization liquid with ammonia as alkali source |
| CN106673012A (en) * | 2016-11-11 | 2017-05-17 | 中冶焦耐(大连)工程技术有限公司 | Process and device for producing strong ammonia water through negative pressure operation |
| CN106673012B (en) * | 2016-11-11 | 2019-07-26 | 中冶焦耐(大连)工程技术有限公司 | A kind of technique and device of negative-pressure operation production concentrated ammonia liquor |
| CN106745062A (en) * | 2017-01-23 | 2017-05-31 | 中冶焦耐(大连)工程技术有限公司 | The technique and device of a kind of negative-pressure operation production concentrated ammonia liquor |
| CN106745062B (en) * | 2017-01-23 | 2019-11-15 | 中冶焦耐(大连)工程技术有限公司 | A kind of technique and device of negative-pressure operation production concentrated ammonia liquor |
| CN112611253A (en) * | 2020-12-01 | 2021-04-06 | 内蒙古金石镁业有限公司 | Automatic cleaning device for cooler and cleaning control method thereof |
| CN112611253B (en) * | 2020-12-01 | 2022-06-07 | 内蒙古金石镁业有限公司 | Automatic cleaning device for cooler and cleaning control method thereof |
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Application publication date: 20140604 |