CN105776715A - Cyclic utilization method of sodium hydroxide and nitric acid in aluminum powder production - Google Patents
Cyclic utilization method of sodium hydroxide and nitric acid in aluminum powder production Download PDFInfo
- Publication number
- CN105776715A CN105776715A CN201610320063.4A CN201610320063A CN105776715A CN 105776715 A CN105776715 A CN 105776715A CN 201610320063 A CN201610320063 A CN 201610320063A CN 105776715 A CN105776715 A CN 105776715A
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- Prior art keywords
- sodium hydroxide
- nitric acid
- concentration
- utilization method
- ammonia nitrogen
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention relates to a cyclic utilization method of sodium hydroxide and nitric acid in aluminum powder production. The cyclic utilization method comprises the following steps: (1) reducing the concentration of ammonia and nitrogen compounds in wastewater to 500 mg/L through evaporation; (2) further reducing the concentration of ammonia and nitrogen compounds in wastewater to 5 mg/L through a hydrophobic membrane, absorbing ammonia and nitrogen with dilute nitric acid, and returning to step (1) when the concentration of ammonium nitrate is greater than 20 percent; (3) treating a mixed solution of sodium nitrate and a little sodium hydroxide through an electroosmosis system with a bipolar membrane to obtain a sodium hydroxide and nitric acid solution. The cyclic utilization method is high in acid and alkali recovery rate, low in energy consumption, simple in process, easy to control in engineering, convenient to operate and maintain and free of pollution. The whole separation system adopts a closed cycle and basically realizes zero emission and acid and alkali recovery, thereby having a certain environment protection effect.
Description
Technical field
The present invention relates to field of waste water treatment, be specifically related to a kind of sodium hydroxide and the nitric acid circulation utilization method in argentum powder produces.
Background technology
Research and development advanced technology equipment, reduces emission of industrial pollutants energetically, is realize the important content that energy-conserving and environment-protective are built with ecological file.
The waste water produced in noble metal argentum powder production process mainly contains the materials such as soda acid, ammonia nitriding compound and reducing agent hydrazine hydrate.At present the processing method of argentum powder production process waste water mainly there are nature neutralisation and medicament neutralisation, there is also that minority enterprise is unprocessed and the phenomenon directly discharged, to surrounding enviroment with ecological cause bigger harm.It practice, the waste water total amount produced in argentum powder preparation process is also little, if it is possible to distinguish source and character, processes scientifically and rationally and dispose relevant waste liquid, can not only effectively reduce environmental pollution, even can also increase enterprise income.The present invention liquid waste processing by argentum powder production process so that soda acid obtains regeneration, the soda acid response rate is high, and energy consumption is low, it is achieved that sodium hydroxide and nitric acid recycling in argentum powder produces, and adds Business Economic Benefit while protection environment.
Summary of the invention
It is an object of the invention to provide a kind of soda acid response rate high, sodium hydroxide that energy consumption is low and nitric acid circulation utilization method in argentum powder produces.
For realizing the technical scheme that the purpose of the present invention adopts:
A kind of sodium hydroxide and nitric acid circulation utilization method in argentum powder produces, comprise the steps:
(1) argentum powder is produced the waste water containing ammonia nitrogen produced and evaporate ammonia treatment processed: the waste water containing ammonia nitrogen is delivered to neutralizing tank, add NaOH stirring to neutralize, it is then sent to evaporating column, separate through evaporating column, after evaporation overhead vapours sends into evaporation overhead condenser condensation, prepare the concentration ammonia more than 20% and the concentration waste water containing ammonia nitrogen lower than 500mg/L, the concentration ammonia more than 20% is stored for future use；
(2) ammonia nitrogen removal technique: the sodium hydroxide solution of the concentration waste water containing ammonia nitrogen lower than 500mg/L in step (1) is adjusted pH to 10-11, then bag filter is used to process, after filtration treatment, utilize deamination membranous system to be processed by the ammonia nitrogen concentration in waste water less than 5mg/L, and deamination membranous system is processed the concentration that obtains be delivered to evaporating column more than the concentration ammonium nitrate more than 20% and be evaporated processing；
(3) by the concentration waste water containing ammonia nitrogen lower than 5mg/L in step (2) after cartridge filter filters, bipolar membrane electrodialysis device is injected together with pure water, after electric osmose system processes, obtain sodium hydroxide solution, salpeter solution and sodium nitrate solution, after concentrated for sodium nitrate solution, inject bipolar membrane electrodialysis device.
In order to improve the evaporating column treatment effeciency to nitrogen-containing wastewater, described step (1) is delivered to evaporating column after the preheated device heat exchange of the waste water containing ammonia nitrogen in neutralizing tank.
Specifically, in the described waste water containing ammonia nitrogen the content of ammonia nitrogen more than 40000mg/L.
Owing to ammonia is volatile, to prevent ammonia from losing, the evaporation overhead condenser of described step (1) adopts and cools down lower than the water at low temperature of room temperature.This problem can also be solved by adding tail gas condenser on ammonia holding vessel top.
Specifically, in described step (2), concentration of sodium hydroxide solution is 10wt%.
As preferably, in described step (2), the process of deamination membranous system process waste water is: by feed liquid circulating pump, waste water is sent into the inner chamber of hollow-fibre membrane in deamination membrane module, and after every grade of pump supercharging, series connection enters the continuous denitrogenation of next stage membrane module；Meanwhile, the nitric acid that concentration is 1% is sent into the exocoel of hollow-fibre membrane in deamination membrane module by circulating pump, enters next stage membrane module continuous absorption ammonia nitrogen, and be back to ammonium nitrate tank after the intensified pump supercharging of water outlet.Deamination membranous system can be the deamination membranous system that Hefei Yu Wangmo engineering company limited produces.
Specifically, the mode that the deamination membrane module of described step (2) takes single-stage in parallel is arranged, and 10-20 props up film altogether.
Specifically, the concentration of the sodium hydroxide that described step (3) obtains is 10-12%.
Specifically, the concentration of the nitric acid that described step (3) obtains is 10-12%.
As preferably, the sodium nitrate solution of described step (3) concentrates through reverse osmosis membrane separation technique.Reverse osmosis membrane separation technique adopts mesohigh two-stage series connection reverse osmosis process.By reverse osmosis, former water being concentrated 10-15 times and return bipolar membrane electrodialysis device, the pure water that reverse osmosis produces is back to production.
Beneficial effects of the present invention:
(1) a kind of sodium hydroxide of the present invention and nitric acid circulation utilization method in argentum powder produces, whole piece-rate system adopts closed cycle, both solved an emission treatment difficult problem for saline for enterprise, and having produced sodium hydroxide and nitric acid simultaneously, being continuing with thus returning production.
(2) a kind of sodium hydroxide of the present invention and nitric acid circulation utilization method in argentum powder produces, the soda acid response rate is high, energy consumption is low, technique is simple, engineering is easy to control, convenient operating maintenance, pollution-free.
(3) a kind of sodium hydroxide of the present invention and nitric acid circulation utilization method in argentum powder produces, the process ammonia removal efficiency of step (1) is high, deamination rate is more than 97%, and operating cost is low, process the waste water operating cost about 210 yuan containing ammonia nitrogen of above-mentioned 2 tons, ammonia can be back to production, and income is used more than handling.
(4) a kind of sodium hydroxide of the present invention and nitric acid circulation utilization method in argentum powder produces, in step (2), ammonia nitrogen adopts dust technology to absorb, as ammonium nitrate concentration > 20%, start evaporating column forwardly to add and again produce ammonia, the sodium nitrate solution having removed ammonia nitrogen goes Bipolar Membrane technique below, processes above-mentioned 2 tons of ammonia nitrogen operating costs less than 500mg/L and is about 4-5 unit, and income is used more than handling.
(5) a kind of sodium hydroxide of the present invention and nitric acid circulation utilization method in argentum powder produces, in step (3), adopt bipolar membrane electrodialysis device, the mixed liquor of the sodium nitrate in above-mentioned solution and a small amount of sodium hydroxide can resolving into the nitric acid of about 10% and the sodium hydroxide solution of about 10%, conversion ratio is about 90-95%.Processing the sodium nitrate solution of above-mentioned about 2 tons, operating cost about about 40 yuan, operating cost is relatively low.
(6) a kind of sodium hydroxide of the present invention and nitric acid circulation utilization method in argentum powder produces, deamination membrane module takes the mode that single-stage is in parallel, equipment convenient operating maintenance.
Accompanying drawing explanation
Fig. 1 is a kind of sodium hydroxide of the present invention and the flow chart of nitric acid circulation utilization method in argentum powder produces；
Fig. 2 is the ammonia nitrogen removal process chart of the present invention；
Fig. 3 is the reverse osmosis membrane separation process chart of the present invention.
Detailed description of the invention
Illustrate that the present invention is further detailed explanation with detailed description of the invention presently in connection with accompanying drawing.
As it is shown in figure 1, a kind of sodium hydroxide and nitric acid circulation utilization method in argentum powder produces, comprise the steps:
(1) argentum powder is produced the waste water containing ammonia nitrogen produced and evaporate ammonia treatment processed: content is delivered to neutralizing tank more than the 40000mg/L waste water containing ammonia nitrogen, add NaOH stirring to neutralize, it is delivered to evaporating column after preheated device heat exchange, separate through evaporating column, after evaporation overhead vapours sends into evaporation overhead condenser condensation, prepare the concentration ammonia more than 20% and the concentration waste water containing ammonia nitrogen lower than 500mg/L, the concentration ammonia more than 20% is stored for future use, wherein, evaporation overhead condenser adopts and cools down lower than the water at low temperature of room temperature；Owing to ammonia is volatile, use and all adopt water at low temperature cooling, not so need to add tail gas condenser on ammonia holding vessel top, to prevent ammonia from losing；
(2) ammonia nitrogen removal technique: the sodium hydroxide solution that waste water concentration is 10wt% containing ammonia nitrogen lower than 500mg/L of the concentration in step (1) is adjusted pH to 10.5, then bag filter is used to process, after filtration treatment, by feed liquid circulating pump, waste water being sent into the inner chamber of hollow-fibre membrane in the deamination membrane module that the mode taking 20 film single-stages in parallel is arranged, after every grade of pump supercharging, series connection enters the continuous denitrogenation of next stage membrane module；Meanwhile, the nitric acid that concentration is 1% is sent into the exocoel of hollow-fibre membrane in deamination membrane module by circulating pump, enters next stage membrane module continuous absorption ammonia nitrogen, and is back to ammonium nitrate tank, as shown in Figure 2 after the intensified pump supercharging of water outlet；Also to ensure that ammonia nitrogen removal effect, it is necessary to timing carries out waste water and adds alkali adjustment PH and absorb liquid, mends acid；When the ammonia nitrogen concentration of waste water drops to 5mg/L, stopping said process, outwards discharge is to subsequent processing, and the concentration absorbing liquid ammonium nitrate can reach more than 20%, then goes preceding working procedure ammonia still process to make ammonia；Water quality and quantity according to this specific embodiment, is assigned as parallel connection by membranous system, processes water yield 2m3/ d, totally 20 films, about can complete 2m in 3-4 hour3Water deamination；
(3) by the concentration waste water containing ammonia nitrogen lower than 5mg/L in step (2) after cartridge filter filters, bipolar membrane electrodialysis device is injected together with pure water, 10wt% sodium hydroxide solution, 10wt% salpeter solution and sodium nitrate solution is obtained after electric osmose system processes, by sodium nitrate solution through in pressure reverse osmosis and high pressure reverse osmosis two steps ro concentration after inject bipolar membrane electrodialysis device, as shown in Figure 3.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not necessarily departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content in description, it is necessary to determine its technical scope according to right.
Claims (10)
1. sodium hydroxide and a nitric acid circulation utilization method in argentum powder produces, comprise the steps:
(1) argentum powder is produced the waste water containing ammonia nitrogen produced and evaporate ammonia treatment processed: the waste water containing ammonia nitrogen is delivered to neutralizing tank, add NaOH stirring to neutralize, it is then sent to evaporating column, separate through evaporating column, after evaporation overhead vapours sends into evaporation overhead condenser condensation, prepare the concentration ammonia more than 20% and the concentration waste water containing ammonia nitrogen lower than 500mg/L, the concentration ammonia more than 20% is stored for future use；
(2) ammonia nitrogen removal technique: the sodium hydroxide solution of the concentration waste water containing ammonia nitrogen lower than 500mg/L in step (1) is adjusted pH to 10-11, then bag filter is used to process, after filtration treatment, utilize deamination membranous system to be processed by the ammonia nitrogen concentration in waste water less than 5mg/L, and deamination membranous system is processed the concentration that obtains be delivered to evaporating column more than the concentration ammonium nitrate more than 20% and be evaporated processing；
(3) by the concentration waste water containing ammonia nitrogen lower than 5mg/L in step (2) after cartridge filter filters, bipolar membrane electrodialysis device is injected together with pure water, after electric osmose system processes, obtain sodium hydroxide solution, salpeter solution and sodium nitrate solution, after concentrated for sodium nitrate solution, inject bipolar membrane electrodialysis device.
2. a kind of sodium hydroxide as claimed in claim 1 and nitric acid circulation utilization method in argentum powder produces, it is characterised in that: described step (1) is delivered to evaporating column after the preheated device heat exchange of the waste water containing ammonia nitrogen in neutralizing tank.
3. a kind of sodium hydroxide as claimed in claim 1 and nitric acid circulation utilization method in argentum powder produces, it is characterised in that: in the described waste water containing ammonia nitrogen, the content of ammonia nitrogen is more than 40000mg/L.
4. a kind of sodium hydroxide as claimed in claim 1 and nitric acid circulation utilization method in argentum powder produces, it is characterised in that: the evaporation overhead condenser of described step (1) adopts and cools down lower than the water at low temperature of room temperature.
5. a kind of sodium hydroxide as claimed in claim 1 and nitric acid circulation utilization method in argentum powder produces, it is characterised in that: in described step (2), concentration of sodium hydroxide solution is 10wt%.
6. a kind of sodium hydroxide as claimed in claim 1 and nitric acid circulation utilization method in argentum powder produces, it is characterized in that: in described step (2), the process of deamination membranous system process waste water is: by feed liquid circulating pump, waste water is sent into the inner chamber of hollow-fibre membrane in deamination membrane module, and after every grade of pump supercharging, series connection enters the continuous denitrogenation of next stage membrane module；Meanwhile, the nitric acid that concentration is 1% is sent into the exocoel of hollow-fibre membrane in deamination membrane module by circulating pump, enters next stage membrane module continuous absorption ammonia nitrogen, and be back to ammonium nitrate tank after the intensified pump supercharging of water outlet.
7. a kind of sodium hydroxide as claimed in claim 6 and nitric acid circulation utilization method in argentum powder produces, it is characterised in that: the mode that the deamination membrane module of described step (2) takes single-stage in parallel is arranged, and 10-20 props up film altogether.
8. a kind of sodium hydroxide as claimed in claim 1 and nitric acid circulation utilization method in argentum powder produces, it is characterised in that: the concentration of the sodium hydroxide that described step (3) obtains is 10-12%.
9. a kind of sodium hydroxide as claimed in claim 1 and nitric acid circulation utilization method in argentum powder produces, it is characterised in that: the concentration of the nitric acid that described step (3) obtains is 10-12%.
10. a kind of sodium hydroxide as claimed in claim 1 and nitric acid circulation utilization method in argentum powder produces, it is characterised in that: the sodium nitrate solution of described step (3) concentrates through reverse osmosis membrane separation technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610320063.4A CN105776715A (en) | 2016-05-13 | 2016-05-13 | Cyclic utilization method of sodium hydroxide and nitric acid in aluminum powder production |
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| CN201610320063.4A CN105776715A (en) | 2016-05-13 | 2016-05-13 | Cyclic utilization method of sodium hydroxide and nitric acid in aluminum powder production |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107758960A (en) * | 2017-10-18 | 2018-03-06 | 江苏理工学院 | A kind of processing method of ammonia waste water |
| CN107892423A (en) * | 2017-10-18 | 2018-04-10 | 江苏理工学院 | A kind of processing method of ammonium nitrate wastewater |
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| JPH06182325A (en) * | 1992-12-17 | 1994-07-05 | Tohoku Electric Power Co Inc | Removing method for ammonium ion in liquid |
| EP2004340A2 (en) * | 2006-03-22 | 2008-12-24 | Kristaly-99, KFT. | Process for the treatment and purification of dangerous wastes containing ammonium salts, particularly ammonium chloride, derived from pharmaceutical or chemical industries |
| CN102757149A (en) * | 2012-08-06 | 2012-10-31 | 哈尔滨工业大学 | Multi-stage membrane distillation treating method for ammonia nitrogen wastewater |
| CN104211244A (en) * | 2013-06-03 | 2014-12-17 | 洁海瑞泉膜技术（北京）有限公司 | Method for gas membrane-process treatment of ammonia-containing feed liquid or wastewater with renewable absorbent and by-producted strong aqua ammonia |
| CN104591465A (en) * | 2015-01-30 | 2015-05-06 | 深圳市危险废物处理站有限公司 | Method for recycling and processing ammonia-nitrogen-containing wastewater in circuit board etching waste liquor recycling industry |
| TW201612109A (en) * | 2014-09-29 | 2016-04-01 | Ind Tech Res Inst | Recovery apparatus for sewage treatment and sewage treatment system |
-
2016
- 2016-05-13 CN CN201610320063.4A patent/CN105776715A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06182325A (en) * | 1992-12-17 | 1994-07-05 | Tohoku Electric Power Co Inc | Removing method for ammonium ion in liquid |
| EP2004340A2 (en) * | 2006-03-22 | 2008-12-24 | Kristaly-99, KFT. | Process for the treatment and purification of dangerous wastes containing ammonium salts, particularly ammonium chloride, derived from pharmaceutical or chemical industries |
| CN102757149A (en) * | 2012-08-06 | 2012-10-31 | 哈尔滨工业大学 | Multi-stage membrane distillation treating method for ammonia nitrogen wastewater |
| CN104211244A (en) * | 2013-06-03 | 2014-12-17 | 洁海瑞泉膜技术（北京）有限公司 | Method for gas membrane-process treatment of ammonia-containing feed liquid or wastewater with renewable absorbent and by-producted strong aqua ammonia |
| TW201612109A (en) * | 2014-09-29 | 2016-04-01 | Ind Tech Res Inst | Recovery apparatus for sewage treatment and sewage treatment system |
| CN104591465A (en) * | 2015-01-30 | 2015-05-06 | 深圳市危险废物处理站有限公司 | Method for recycling and processing ammonia-nitrogen-containing wastewater in circuit board etching waste liquor recycling industry |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107758960A (en) * | 2017-10-18 | 2018-03-06 | 江苏理工学院 | A kind of processing method of ammonia waste water |
| CN107892423A (en) * | 2017-10-18 | 2018-04-10 | 江苏理工学院 | A kind of processing method of ammonium nitrate wastewater |
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Application publication date: 20160720 |