CN102311150A - Process for reducing CN<-> content in ammonia evaporation wastewater - Google Patents
Process for reducing CN<-> content in ammonia evaporation wastewater Download PDFInfo
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- CN102311150A CN102311150A CN201110084241A CN201110084241A CN102311150A CN 102311150 A CN102311150 A CN 102311150A CN 201110084241 A CN201110084241 A CN 201110084241A CN 201110084241 A CN201110084241 A CN 201110084241A CN 102311150 A CN102311150 A CN 102311150A
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- ammonia
- tower tray
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- ammonia still
- tower
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Abstract
The invention relates to the technical field of ammonia-containing wastewater deamination in the coking industry, in particular to a process for reducing the CN<-> content in ammonia evaporation wastewater. The process is characterized by comprising the following steps of: adding alkaline liquor to 10th-16th tower trays of an ammonia evaporation tower; reacting the raw material of ammonia with the alkaline liquor; flowing into the next layer of tower tray to distill continuously; and flowing out the ammonia evaporation wastewater from the lower part of the ammonia evaporation tower. A broken tower tray is arranged in the middle of the ammonia evaporation tower and used for preventing evaporated ammonia at the upper part overflowing to the tower tray at the lower part, and an alkaline liquor inlet is located above the side part of the broken tower tray. Compared with the prior art, the invention has the advantages that the process greatly reduces the CN<-> content under the premise of ensuring that the ammonia evaporation wastewater T-NH3 is qualified, and provides favorable guarantees for standardized discharge of the wastewater of a coking plant.
Description
Technical field
The present invention relates to coking industry ammonia-containing water deamination technical field, be specifically related to CN in a kind of reduction distilled ammonia wastewater
-The technology of content.
Background technology
At present, country is to full cyanogen content index request standard, strictness day by day in the coal chemical enterprise waste discharge, and wherein distilled ammonia wastewater is a most important part in the full factory discharge of wastewater.In addition, distilled ammonia wastewater not directly discharges, and before discharging, distilled ammonia wastewater and other sewage at first pass through the biological effluent treatment device.In the conventional design, because CN in the distilled ammonia wastewater
-Content is higher, causes through CN in the waste water behind the biological effluent treatment device that adopts conventional Technologies of Coke Plant Wastewater Treatment
-Content overproof; Simultaneously, owing to contain CN
-Waste water contain certain toxicity, the bacterial growth in the wastewater treatment equipment is impacted, cause normally to make the many index of discharge of wastewater defective.Therefore, CN in the distilled ammonia wastewater
-Content has become restriction coking industry discharge of wastewater principal element up to standard, and it is perfect to need to be resolved hurrily.
Summary of the invention
The purpose of this invention is to provide CN in a kind of reduction distilled ammonia wastewater
-The technology of content, this technology is guaranteeing distilled ammonia wastewater T-NH
3Under the qualified prerequisite, reduced CN significantly
-Content is for the Coking Plant Wastewater emission compliance provides a favorable guarantee.
For realizing above-mentioned purpose, the present invention realizes through following technical scheme:
CN in a kind of reduction distilled ammonia wastewater
-The technology of content, this technology adds alkali lye at ammonia still the 10th to the 16th tower tray place, continues distillation from flowing into next layer tower tray behind raw material ammonia water and the alkaline reaction, and distilled ammonia wastewater is flowed out by the ammonia still bottom.
Described ammonia still middle part is provided with disconnected tower tray, and on the ammonia still tower tray of described disconnected tower tray in order to ammonia still process water overflow to its underpart of blocking its top, alkali liquor inlet is positioned at disconnected tower tray sidepiece top.
Disconnected tower tray top of described ammonia still and bottom tower wall are provided with ammonia still process water pipe, will be imported on the tower tray of disconnected tower tray below by the disconnected tower tray of ammonia still top with the ammonia still process water behind the alkaline reaction to continue distillation; Described disconnected tower tray allows the vapour phase of its below to pass through, and rises to the tower tray of disconnected tower tray top.
Described disconnected tower tray place is provided with gas tube, the gas tube alkali liquor inlet that is higher than suitable for reading, and the gas tube top is provided with guiding device.
Disconnected tower tray top of described ammonia still and bottom Ta Bi are provided with ammonia still process water pipe, will be imported in the ammonia still of disconnected tower tray below by disconnected tower tray top with the ammonia still process water behind the alkaline reaction to continue distillation; Disconnected tower tray top of described ammonia still and bottom tower wall are provided with vapour phase pipe, and the ammonia vapour that generates behind the ammonia distillation is imported in the ammonia still of disconnected tower tray top by the disconnected tower tray of ammonia still below; Said disconnected tower tray blocks vapour phase rising in the ammonia still.
CN in a kind of reduction distilled ammonia wastewater
-The technology of content, said technology comprises ammonia still, reaction tower or tempering tank, the ammonia still middle part is provided with disconnected tower tray; Reaction tower or tempering tank are provided with alkali liquor inlet; Raw material ammonia water is drawn by the disconnected tower tray of ammonia still top and is got into reaction tower or tempering tank; Raw material ammonia water and alkaline reaction in reaction tower or tempering tank; Decompose fixed ammonia, reacted solution flows on the tower tray below the disconnected tower tray of ammonia still and continues distillation, and the ammonia vapour of overflowing in reaction tower or tempering tank top gets into the tower tray of the tower tray top of breaking.
Compared with prior art, the invention has the beneficial effects as follows:
This technology is guaranteeing distilled ammonia wastewater T-NH
3Under the qualified prerequisite, reduced CN significantly
-Content is for the Coking Plant Wastewater emission compliance provides a favorable guarantee.Add the alkali place at ammonia still disconnected tower tray is set, raw material ammonia water and alkali lye fully react the back and continue distillation from flowing into next layer tower tray.Also reaction tower or tempering tank can be set separately.Raw material ammonia water and other waste water, alkali lye that disconnected tower tray is drawn fully react, mix the back from flowing back to one deck tower tray under the ammonia still in reaction tower or tempering tank.Go into the tower position through adjustment alkali lye, realize significantly improving the purpose of distilled ammonia wastewater and even full factory discharge of wastewater index.Except that needs were provided with reaction tower or tempering tank, this technology was compared with conventional design, did not have extra construction investment.
Description of drawings
Fig. 1 is the structure iron of the embodiment of the invention 1;
Fig. 2 is the structure iron of the embodiment of the invention 2;
Fig. 3 is the structure iron of the embodiment of the invention 3;
Fig. 4 is the structure iron of the embodiment of the invention 4.
Embodiment
As shown in Figure 1, CN in a kind of reduction distilled ammonia wastewater
-The technology of content; Reaction tower or tempering tank 2 are set outside ammonia still 1; Be provided with disconnected tower tray 3 (the 12nd tower tray) in the ammonia still 1; Described disconnected tower tray 3 in order to the ammonia still process water overflow of blocking its top to the ammonia still of its underpart, the vapour phase that allows its below through, rise to disconnected tower tray top and discharge by the ammonia still cat head.Reaction tower or tempering tank 2 are provided with alkali liquor inlet; Raw material ammonia water is drawn by disconnected tower tray 3 tops of ammonia still and is got into reaction tower or tempering tank 2; Raw material ammonia water and alkaline reaction in reaction tower or tempering tank 2; Decompose fixed ammonia, continue distillation on the tower tray of disconnected tower tray 3 belows of reacted solution inflow ammonia still, disconnected tower tray 3 tops of overflowing in reaction tower or tempering tank 2 tops of ammonia entering.Distilled ammonia wastewater is flowed out by ammonia still 1 bottom, and ammonia vapour is discharged by ammonia still 1 top.
As shown in Figure 2, CN in a kind of reduction distilled ammonia wastewater
-The technology of content is provided with disconnected tower tray 3 (the 12nd tower tray) in the ammonia still, disconnected tower tray 3 tops of ammonia still and bottom tower wall are provided with ammonia still process water pipe 4, will be imported on the tower tray of disconnected tower tray below by disconnected tower tray 3 tops with the ammonia still process water behind the alkaline reaction to continue distillation; Described disconnected tower tray 3 allows the vapour phase of its below to pass through, and rises to disconnected tower tray top.Disconnected tower tray 3 places are provided with gas tube 6, gas tube 6 alkali liquor inlets that are higher than suitable for reading, and gas tube 6 tops are provided with guiding device 5.The outlet of gas tube 6 is higher than alkali liquor inlet, and purpose is to separate for the alkali lye that makes ammonia vapour and entering ammonia still, and gas tube 6 tops are provided with guiding device 5, and sidepiece is provided with the ammonia vapor outlet, and this structure can make ammonia vapour be more evenly distributed.
As shown in Figure 3, CN in a kind of reduction distilled ammonia wastewater
-The technology of content; Be provided with disconnected tower tray 3 (the 12nd tower tray) in the ammonia still; Disconnected tower tray 3 tops of described ammonia still and bottom tower wall are provided with ammonia still process water pipe 7, will be imported in the ammonia still of disconnected tower tray below by disconnected tower tray 3 tops with the ammonia still process water behind the alkaline reaction to continue distillation; Disconnected tower tray 3 tops of described ammonia still and bottom tower wall are provided with vapour phase pipe 8 and vapour phase pipe 9, and the ammonia vapour that generates behind the ammonia distillation is imported in the ammonia still of disconnected tower tray top by disconnected tower tray 3 belows of ammonia still; Said disconnected tower tray blocks the ammonia still process water overflow on its top to the ammonia still of its underpart, and blocks vapour phase rising in the ammonia still.
As shown in Figure 4, CN in a kind of reduction distilled ammonia wastewater
-The technology of content, this technology adds alkali lye at ammonia still the 10th to the 16th tower tray place, continues distillation from flowing into next layer tower tray behind raw material ammonia water and the alkaline reaction, and distilled ammonia wastewater is flowed out by the ammonia still bottom.
Claims (6)
1. one kind is reduced CN in the distilled ammonia wastewater
-The technology of content is characterized in that, this technology adds alkali lye at ammonia still the 10th to the 16th tower tray place, continues distillation from flowing into next layer tower tray behind raw material ammonia water and the alkaline reaction, and distilled ammonia wastewater is flowed out by the ammonia still bottom.
2. CN in a kind of reduction distilled ammonia wastewater according to claim 1
-The technology of content is characterized in that, described ammonia still middle part is provided with disconnected tower tray, and on the ammonia still tower tray of described disconnected tower tray in order to ammonia still process water overflow to its underpart of blocking its top, alkali liquor inlet is positioned at disconnected tower tray sidepiece top.
3. CN in a kind of reduction distilled ammonia wastewater according to claim 2
-The technology of content is characterized in that, disconnected tower tray top of described ammonia still and bottom tower wall are provided with ammonia still process water pipe, will be imported on the tower tray of disconnected tower tray below by the disconnected tower tray of ammonia still top with the ammonia still process water behind the alkaline reaction to continue distillation; Described disconnected tower tray allows the vapour phase of its below to pass through, and rises to the tower tray of disconnected tower tray top.
4. CN in a kind of reduction distilled ammonia wastewater according to claim 3
-The technology of content is characterized in that, described disconnected tower tray place is provided with gas tube, the gas tube alkali liquor inlet that is higher than suitable for reading, and the gas tube top is provided with guiding device.
5. CN in a kind of reduction distilled ammonia wastewater according to claim 2
-The technology of content is characterized in that, disconnected tower tray top of described ammonia still and bottom Ta Bi are provided with ammonia still process water pipe, will be imported in the ammonia still of disconnected tower tray below by disconnected tower tray top with the ammonia still process water behind the alkaline reaction to continue distillation; Disconnected tower tray top of described ammonia still and bottom tower wall are provided with vapour phase pipe, and the ammonia vapour that generates behind the ammonia distillation is imported in the ammonia still of disconnected tower tray top by the disconnected tower tray of ammonia still below; Said disconnected tower tray blocks vapour phase rising in the ammonia still.
6. one kind is reduced CN in the distilled ammonia wastewater
-The technology of content is characterized in that, said technology comprises ammonia still, reaction tower or tempering tank, and the ammonia still middle part is provided with disconnected tower tray; Reaction tower or tempering tank are provided with alkali liquor inlet; Raw material ammonia water is drawn by the disconnected tower tray of ammonia still top and is got into reaction tower or tempering tank; Raw material ammonia water and alkaline reaction in reaction tower or tempering tank; Decompose fixed ammonia, reacted solution flows on the tower tray below the disconnected tower tray of ammonia still and continues distillation, and the ammonia vapour of overflowing in reaction tower or tempering tank top gets into the tower tray of the tower tray top of breaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110084241A CN102311150A (en) | 2011-04-02 | 2011-04-02 | Process for reducing CN<-> content in ammonia evaporation wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110084241A CN102311150A (en) | 2011-04-02 | 2011-04-02 | Process for reducing CN<-> content in ammonia evaporation wastewater |
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| Publication Number | Publication Date |
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| CN102311150A true CN102311150A (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110084241A Pending CN102311150A (en) | 2011-04-02 | 2011-04-02 | Process for reducing CN<-> content in ammonia evaporation wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435118A (en) * | 2013-09-17 | 2013-12-11 | 天津市创举科技有限公司 | Ammonia-nitrogen wastewater removal process and equipment |
| CN103449551A (en) * | 2013-09-17 | 2013-12-18 | 天津市创举科技有限公司 | Multi-level ammonia-nitrogen wastewater removal process and equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631810A (en) * | 2003-12-22 | 2005-06-29 | 济南钢铁集团总公司 | Process for treating residual ammonia water of coking |
| JP2005205357A (en) * | 2004-01-26 | 2005-08-04 | Ngk Insulators Ltd | Absorption apparatus of ammonia and/or ammonium ion |
| CN1948188A (en) * | 2006-10-27 | 2007-04-18 | 中国科学院成都有机化学有限公司 | Coking waste water zero discharge treatment process |
| CN101475842A (en) * | 2008-12-11 | 2009-07-08 | 中冶焦耐工程技术有限公司 | Ammonia distillation process |
-
2011
- 2011-04-02 CN CN201110084241A patent/CN102311150A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631810A (en) * | 2003-12-22 | 2005-06-29 | 济南钢铁集团总公司 | Process for treating residual ammonia water of coking |
| JP2005205357A (en) * | 2004-01-26 | 2005-08-04 | Ngk Insulators Ltd | Absorption apparatus of ammonia and/or ammonium ion |
| CN1948188A (en) * | 2006-10-27 | 2007-04-18 | 中国科学院成都有机化学有限公司 | Coking waste water zero discharge treatment process |
| CN101475842A (en) * | 2008-12-11 | 2009-07-08 | 中冶焦耐工程技术有限公司 | Ammonia distillation process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435118A (en) * | 2013-09-17 | 2013-12-11 | 天津市创举科技有限公司 | Ammonia-nitrogen wastewater removal process and equipment |
| CN103449551A (en) * | 2013-09-17 | 2013-12-18 | 天津市创举科技有限公司 | Multi-level ammonia-nitrogen wastewater removal process and equipment |
| CN103449551B (en) * | 2013-09-17 | 2015-04-08 | 天津市创举科技有限公司 | Multi-level ammonia-nitrogen wastewater removal process and equipment |
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Application publication date: 20120111 |