CN102765842A - Pressure-reduction, alkali-addition and ammonia-distillation system - Google Patents
Pressure-reduction, alkali-addition and ammonia-distillation system Download PDFInfo
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- CN102765842A CN102765842A CN2012102743419A CN201210274341A CN102765842A CN 102765842 A CN102765842 A CN 102765842A CN 2012102743419 A CN2012102743419 A CN 2012102743419A CN 201210274341 A CN201210274341 A CN 201210274341A CN 102765842 A CN102765842 A CN 102765842A
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Abstract
The invention discloses a pressure-reduction, alkali-addition and ammonia-distillation system. The system comprises a residual ammonia water tank, an ammonia distillation tower, a finished product ammonia water tank and a vacuum pumping system; by the improvements of using a metering pump to simultaneously adding an alkali liquor in an alkali liquor tank into pipes arranged at the front end and the back end of the residual ammonia water tank, and connecting the residual ammonia water tank and the vacuum pumping system with a tail gas recycling device, the use conditions of negative pressure ammonia distillation process are prepared. According to the pressure-reduction, alkali-addition and ammonia-distillation system, only an alkali-addition position needs to be adjusted without changing former ammonia distillation process and devices, the quality of ammonia distillation waste water can satisfy the demand of next process, so that the process is simple and the investment is low; the switch of pressure-reduction ammonia-distillation and normal pressure ammonia-distillation is not affected; the pressure-reduction ammonia-distillation process is improved; and the industrial process of the pressure-reduction ammonia-distillation is promoted. With the simplest process changes and lowest investment, the pressure-reduction, alkali-addition and ammonia-distillation system improves the quality of the ammonia distillation waste water, promotes the research process of the pressure-reduction ammonia-distillation, and is in favor of promoting the popularization and application of the pressure-reduction ammonia-distillation process.
Description
Technical field
The present invention relates to coal tar ammoniacal liquor deamination technical field, specifically a kind of decompression adds the alkali ammonia steaming system.
Background technology
Coal produces a certain amount of ammonia nitrogen, prussiate, sulfide, phenol and all higher remained ammonia of COD concentration in coking.Remained ammonia generally will pass through treatment process such as oil removing, ammonia still process, dephenolize.Ammonia still process in the ammonia nitrogen, also can remove prussiate and sulfide in the remained ammonia in removing remained ammonia, make distilled ammonia wastewater can satisfy the requirement of biological dephenolize influent quality.Ammonia distillation process decomposes solid ammonium-salt and is volatilization ammonia through adding alkali, utilizes ammonia different with the boiling point of water and separate volatilization ammonia again, obtains distilled ammonia wastewater.Ammonia still process can be divided into normal pressure ammonia still process and decompression ammonia still process according to the working pressure difference.Decompression ammonia still process can cut down the consumption of energy, and improves environment, is the research direction of coking industry energy-saving and emission-reduction.Traditional normal pressure ammonia still process generally adds alkali and decomposes the distilled ammonia wastewater that solid ammonium-salt just can be met biological dephenolize water quality requirement before remained ammonia is gone into tower.Decompression ammonia still process novel process adopts traditional normal pressure ammonia still process to add the alkali method owing to reduced working pressure and temperature, and distilled ammonia wastewater can not reach the requirement of biological phenol removal process influent quality.The present invention has studied a kind of decompression ammonia still process and has added the alkali novel method, makes decompression distilled ammonia wastewater water quality satisfy the requirement of biological phenol removal process influent quality.
Summary of the invention
The object of the present invention is to provide a kind of decompression to add the alkali ammonia steaming system,, reach the purpose that improves the ammonia still process working efficiency, reduces cost through original ammonia steaming system is improved.
The present invention solves the technical scheme that its technical problem takes: a kind of decompression adds the alkali ammonia steaming system; Comprise remained ammonia groove, ammonia still, finished product ammonia vessel and pumped vacuum systems; The liquid outlet of said remained ammonia groove is successively through being connected to the import of ammonia still behind first pump, interchanger and the preheater; The air outlet at said ammonia still top is connected to the finished product ammonia vessel through reduction appts. and water cooler in order; Said finished product ammonia vessel connects pumped vacuum systems, and the wastewater outlet of said ammonia still bottom is connected to interchanger through the 3rd pump, it is characterized in that; Also comprise a lye vat and device for recovering tail gas; Alkali lye in the said lye vat adds to through volume pump in the pipeline of remained ammonia groove rear and front end simultaneously, in the pipeline in import of remained ammonia groove and exit, adds alkali lye, and said remained ammonia groove and pumped vacuum systems are connected to device for recovering tail gas simultaneously.
Ammoniacal liquor in the said finished product ammonia vessel is through second pump part trim the top of column, and another part is stored for finished product ammoniacal liquor.
The invention has the beneficial effects as follows:
(I) do not change former ammonia distillation process and equipment, only adjusts adding the alkali position, just can make distilled ammonia wastewater water quality satisfy the next procedure requirement, and technology is simple, invests low;
(II) do not influence the switching of decompression ammonia still process and normal pressure ammonia still process;
(III) adds the controlled and suitable minimizing of alkali number, can reduce production costs;
(IV) utilizes the ammonia still process existing installation to realize the tail gas recycle utilization;
(V) is to the perfect of ammonia distillation process that reduce pressure, and promoted the process of industrialization of decompression ammonia still process.
The present invention has improved decompression distilled ammonia wastewater water quality with the investment of the most easy process variations, minimum, has advanced the flow of research of decompression ammonia still process, helps promoting applying the decompression ammonia distillation process.
Description of drawings
Fig. 1 is a synoptic diagram of the present invention;
Among the figure: 1 remained ammonia groove, 2 first pumps, 3 interchanger, 4 preheaters, 5 ammonia stills, 6 reduction appts.s, 7 water coolers, 8 finished product ammonia vessels, 9 second pumps, 10 pumped vacuum systems, 11 device for recovering tail gas, 12 the 3rd pumps, 13 lye vats, 14 volume pumps.
Embodiment
It is as shown in Figure 1,
A kind of decompression adds the alkali ammonia steaming system, comprises remained ammonia groove 1, ammonia still 5, finished product ammonia vessel 8, pumped vacuum systems 10, lye vat 13 and device for recovering tail gas more than 11 big functional components, through a kind of decompression ammonia steaming system of effectively being combined to form of several big function devices.
Through being connected to the import of ammonia still 5 behind first pump 2, interchanger 3 and the preheater 4, import is positioned at top to the liquid outlet of remained ammonia groove 1 successively.The air outlet at ammonia still 5 tops is connected to finished product ammonia vessel 8 through reduction appts. 6 and water cooler 7 in order, and the finished product ammonia vessel is the storage vessel of finished product ammoniacal liquor.The finished product ammonia vessel is passing through the pipe connection pumped vacuum systems, and the wastewater outlet of ammonia still 5 bottoms is connected to interchanger 3 through second pump 12, makes waste water can carry out the exchange of heat with remained ammonia.
Add the alkali system and comprise lye vat 13 and volume pump 14, the alkali lye in the lye vat adds to through volume pump 14 in the pipeline of remained ammonia groove 1 rear and front end simultaneously, and remained ammonia groove 1 is adorned 11 through pipe connection to tail gas recycle simultaneously with pumped vacuum systems 10 and put.
Ammoniacal liquor in the finished product ammonia vessel 8 is through second pump, 9 a part of trim the top of column, and another part is stored for finished product ammoniacal liquor.
Working process is such, and the remained ammonia that solution-off is come is stored at remained ammonia groove 1, through 2 pressurizations of first pump; And selection reasonably adds the alkali point on the pipeline between the remained ammonia groove and first pump; In alkali lye adding system, alkali is added in the remained ammonia through volume pump 14 by lye vat 13, and the position separation that adds alkali point is on the pipeline of remained ammonia groove rear and front end; Then respectively with wastewater heat exchange device 3, thermal oil preheater heat exchange 4 after, get into ammonia still 5 inside and distill.
The ammonia vapor product that cat head comes out obtains finished product ammoniacal liquor in finished product ammonia vessel 8 behind reduction appts. 6 and water cooler 7, through second pump, 9 a part of trim the top of column, a part is a finished product ammoniacal liquor; For realizing underpressure distillation, vacuum system is that the operation of total system provides negative pressure, and the tail gas recycle use device is handled the back emptying to remaining ammonia, and device for recovering tail gas can be spray column.
Obtain distilled ammonia wastewater at the bottom of the tower, after 12 pressurizations of useless the 3rd pump, advance interchanger and the heat exchange of raw material remained ammonia after, send down operation through cooling off again.
Except that the described technical characterictic of specification sheets, be the known technology of those skilled in the art.
Claims (2)
1. a decompression adds the alkali ammonia steaming system; Comprise remained ammonia groove, ammonia still, finished product ammonia vessel and pumped vacuum systems; The liquid outlet of said remained ammonia groove is successively through being connected to the import of ammonia still behind first pump, interchanger and the preheater; The air outlet at said ammonia still top is connected to the finished product ammonia vessel through reduction appts. and water cooler in order, and said finished product ammonia vessel connects pumped vacuum systems, and the wastewater outlet of said ammonia still bottom is connected to interchanger through the 3rd pump; It is characterized in that; Also comprise a lye vat and device for recovering tail gas, the alkali lye in the said lye vat adds to through volume pump in the pipeline of import of remained ammonia groove and outlet simultaneously, and said remained ammonia groove and pumped vacuum systems are connected to device for recovering tail gas simultaneously.
2. a kind of decompression according to claim 1 adds the alkali ammonia steaming system, it is characterized in that, the ammoniacal liquor in the said finished product ammonia vessel is through second pump part trim the top of column, and another part is stored for finished product ammoniacal liquor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012102743419A CN102765842A (en) | 2012-08-03 | 2012-08-03 | Pressure-reduction, alkali-addition and ammonia-distillation system |
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| CN2012102743419A CN102765842A (en) | 2012-08-03 | 2012-08-03 | Pressure-reduction, alkali-addition and ammonia-distillation system |
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| CN102765842A true CN102765842A (en) | 2012-11-07 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073145A (en) * | 2013-02-01 | 2013-05-01 | 济钢集团有限公司 | System for recovering light oil from residual ammonia water |
| CN103274489A (en) * | 2013-05-21 | 2013-09-04 | 中冶焦耐工程技术有限公司 | Negative-pressure ammonia distillation process and device taking crude gas waste heat as heat source |
| CN103693797A (en) * | 2013-12-31 | 2014-04-02 | 杨立 | Surplus ammonia water treatment process |
| CN104860465A (en) * | 2015-05-22 | 2015-08-26 | 江西明兴环境工程有限公司 | Double-tower catalysis thermal-coupling reflux deamination method and deamination device thereof |
| CN105271305A (en) * | 2015-09-29 | 2016-01-27 | 山东钢铁股份有限公司 | Method for treating ammonia water obtained after ammonia distillation of residual ammonia water |
| 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 |
| CN109336133A (en) * | 2018-11-15 | 2019-02-15 | 山东联盛环保科技有限公司 | A kind of device and technique of negative pressure low temperature recycling high concentration ammonium hydroxide |
| CN111115934A (en) * | 2019-12-20 | 2020-05-08 | 中轻建设(安徽)设计工程有限公司 | Desulfurization ammonia nitrogen wastewater treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20020000332A (en) * | 2000-06-23 | 2002-01-05 | 이구택 | Apparatus for retrieving coal tar pitch of amonia distillation tower |
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2012
- 2012-08-03 CN CN2012102743419A patent/CN102765842A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020000332A (en) * | 2000-06-23 | 2002-01-05 | 이구택 | Apparatus for retrieving coal tar pitch of amonia distillation tower |
Non-Patent Citations (3)
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| 林宪喜等: "尾气治理技术在济钢化工厂的应用", 《山东冶金》 * |
| 焦国辉等: "焦化剩余氨水蒸氨系统的工艺优化", 《广东化工》 * |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073145A (en) * | 2013-02-01 | 2013-05-01 | 济钢集团有限公司 | System for recovering light oil from residual ammonia water |
| CN103274489A (en) * | 2013-05-21 | 2013-09-04 | 中冶焦耐工程技术有限公司 | Negative-pressure ammonia distillation process and device taking crude gas waste heat as heat source |
| CN103693797A (en) * | 2013-12-31 | 2014-04-02 | 杨立 | Surplus ammonia water treatment process |
| CN103693797B (en) * | 2013-12-31 | 2016-02-10 | 杨立 | A kind of remained ammonia treatment process |
| CN104860465A (en) * | 2015-05-22 | 2015-08-26 | 江西明兴环境工程有限公司 | Double-tower catalysis thermal-coupling reflux deamination method and deamination device thereof |
| CN105271305A (en) * | 2015-09-29 | 2016-01-27 | 山东钢铁股份有限公司 | Method for treating ammonia water obtained after ammonia distillation of residual ammonia water |
| 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 |
| CN109336133A (en) * | 2018-11-15 | 2019-02-15 | 山东联盛环保科技有限公司 | A kind of device and technique of negative pressure low temperature recycling high concentration ammonium hydroxide |
| CN111115934A (en) * | 2019-12-20 | 2020-05-08 | 中轻建设(安徽)设计工程有限公司 | Desulfurization ammonia nitrogen wastewater treatment method |
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Application publication date: 20121107 |