CN103432974A - Deaminizing and dewatering technology and special device for sodium persulfate (salt) synthetic fluid - Google Patents
Deaminizing and dewatering technology and special device for sodium persulfate (salt) synthetic fluid Download PDFInfo
- Publication number
- CN103432974A CN103432974A CN2013104174722A CN201310417472A CN103432974A CN 103432974 A CN103432974 A CN 103432974A CN 2013104174722 A CN2013104174722 A CN 2013104174722A CN 201310417472 A CN201310417472 A CN 201310417472A CN 103432974 A CN103432974 A CN 103432974A
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- Prior art keywords
- air
- sodium persulfate
- liquid
- ammonia
- special device
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- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 title claims abstract description 32
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 title claims abstract description 32
- 150000003839 salts Chemical class 0.000 title claims abstract description 18
- 239000012530 fluid Substances 0.000 title claims abstract description 4
- 238000005516 engineering process Methods 0.000 title abstract 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 13
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 6
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 4
- 230000018044 dehydration Effects 0.000 claims description 24
- 238000006297 dehydration reaction Methods 0.000 claims description 24
- 230000009615 deamination Effects 0.000 claims description 23
- 238000006481 deamination reaction Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 18
- 238000009826 distribution Methods 0.000 claims description 13
- 239000012452 mother liquor Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 5
- 238000007086 side reaction Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- -1 ammonium ions Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
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- Degasification And Air Bubble Elimination (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the technical field of sodium persulfate (salt) preparation, and particularly discloses a deaminizing and dewatering technology and a special device for sodium persulfate (salt) synthetic fluid. According to main technical schemes, air heated to 80-200 DEG C by an air heater passes through an air distributor arranged in a reaction still, then heat is uniformly and quickly transferred to reaction liquid, so that ammonia and moisture in the reaction liquid are quickly evaporated, separated ammonia gas enters an ammonia recovery tower through a gas pipeline, is circularly absorbed by mother liquid containing dilute sulphuric acid to become ammonium sulfate mother liquid and then the ammonium sulfate mother liquid enters a sodium persulfate electrolysis system. The special device has the characteristics of simple structure and convenience for operation; side reactions can be reduced through deaminizing and dewatering by utilizing the device, so that the high temperature decomposition possibility of a sodium persulfate target product is greatly reduced, the yield of sodium persulfate is increased, and the economic benefit is increased.
Description
Technical Field
The invention belongs to the technical field of sodium persulfate (salt) preparation, and particularly relates to a deamination and dehydration process for a sodium persulfate (salt) synthetic liquid and a special device.
Background
The direct synthesis of sodium persulfate from ammonium persulfate and sodium hydroxide as main raw materials is an effective method recognized worldwide, but when the target product sodium persulfate is generated, a large amount of ammonia gas or/and ammonium ions are generated in both alkaline environment and acidic environment, which leads to the generation of sodium sulfate without value utilization (side reaction is more severe in alkaline environment) in a reaction system. In view of this, timely and effective separation and recovery of ammonia from the reaction solution is one of the key problems to be solved in the synthesis process of sodium persulfate. In addition, the reaction solution is in a severely unsaturated state due to a large amount of water brought into the system by the liquid raw material during synthesis and a certain amount of water is also generated during the reaction, and therefore, dehydration and concentration operations become another important problem of the process.
At present, vacuum evaporation is generally adopted to achieve the purposes of deamination and dehydration simultaneously. However, such evaporation operation not only requires the configuration of efficient vacuum equipment, but also increases equipment investment and operating costs. It is more important to find a suitable temperature and heating method for this operation because too high an evaporation temperature causes a large amount of decomposition of persulfate ions in the synthesis system and accelerates the progress of side reactions. The steam jacket is commonly used in the industry at present for heating, the steam temperature is about 160 ℃, the evaporation temperature of the synthetic liquid is 40-50 ℃, the evaporation temperature can not cause the overtemperature decomposition of the synthetic liquid, but the contact part of the synthetic liquid and the steam jacket can be locally overtemperature, because the synthetic liquid forms a detention layer close to the periphery of the jacket under the pushing of a stirring paddle, the closer to the jacket, the higher the temperature is, the overtemperature decomposition of the sodium persulfate can not be avoided. The other disadvantage of steam jacket heating is that the liquid level in the kettle is gradually reduced along with the deamination and dehydration of the synthetic liquid, the jacket is exposed out of the liquid level, and severe scabbing is caused by splashing of the solution. In addition, the steam cost is high, the cost of steam is more than 200 per ton from the desalting and the deoxidizing of water treatment to the steam generated by heating coal, and the steam is easy to be discharged along with condensed water, so that the operation cost is increased. Steam jacket heating also often causes can spray due to vacuum system failure, which not only wastes a large amount of material, but is also very dangerous.
Disclosure of Invention
The invention aims to provide a special device for deamination and dehydration process of sodium persulfate (salt) synthetic solution, which can effectively avoid side reaction in the synthetic process and has simple process flow.
The second purpose of the invention is to provide the deamination and dehydration process of the sodium persulfate synthetic solution.
The technical scheme for realizing the first purpose provided by the invention is as follows:
the utility model provides a sodium persulfate (salt) synthetic fluid deamination, dehydration isolated plant which characterized in that: the structure of the device comprises a reaction kettle which is provided with a material separating machine and an air distribution mechanism inside, and an air heater with heating and blowing functions, wherein the air heater is introduced into the reaction kettle through a pipeline and communicated with the air distribution mechanism in the reaction kettle, and an exhaust port arranged at the upper end of the reaction kettle is communicated with an absorption mechanism containing dilute sulfuric acid mother liquor through an ammonia pipeline.
Wherein the additional technical characteristics of the special device for deamination and dehydration of the sodium persulfate (salt) synthetic solution further comprise:
the absorption mechanism is a circulating reaction tower provided with a liquid inlet, a liquid outlet, an ammonia gas inlet and an exhaust port;
the air distribution mechanism is a round cake-shaped structure which is arranged at the bottom of the reaction kettle and consists of a panel with air holes uniformly distributed and a bottom plate with an inlet;
the air distribution mechanism is formed by annular pipes which are fixed on the side wall of the bottom of the reaction kettle and are uniformly provided with air holes.
The technical scheme for realizing the second purpose provided by the invention is as follows:
a special device for preparing the deamination and dehydration process of the sodium persulfate (salt) synthetic solution; wherein,
the deamination and dehydration process for the sodium persulfate (salt) synthetic liquid by utilizing the special device comprises the steps of pressurizing air by an air blowing mechanism, then heating the air by an air heater with a heating function, enabling hot air heated to 80-200 ℃ to enter an air distributor of a reaction kettle through a pipeline, uniformly contacting with the reaction liquid after being distributed by the air distributor, and rapidly transmitting heat to the reaction liquid to enable ammonia and moisture in the reaction liquid to be rapidly evaporated; the gas with higher ammonia content in the early stage enters an ammonia recovery tower through a gas pipeline, is circularly absorbed by mother liquor containing dilute sulfuric acid and is changed into ammonium sulfate, then is discharged, and the mother liquor enters an ammonium persulfate electrolysis system; and directly emptying the water vapor and air which do not contain ammonia at the later stage.
Compared with the prior art, the deamination and dehydration process and the special device for the sodium persulfate synthetic liquid have the following advantages: firstly, the process adopts hot air as a deamination and dehydration medium, can uniformly heat reaction liquid in a reaction kettle, has the characteristics of high heating speed and uniform heating, can effectively avoid side reaction, greatly reduces the possibility of high-temperature decomposition of a target sodium persulfate product, increases the yield of sodium persulfate, and improves the economic benefit; secondly, because the air distributor used for uniformly distributing hot air is arranged in the reaction kettle of the special device, conditions are provided for uniformly heating the reaction liquid by the hot air, the device can greatly simplify the process flow, a stirrer, a vacuum and circulating water cooling system and a steam heating jacket and a condensate water recovery system are omitted, thereby saving the investment, being more convenient for operation and reducing the deamination and dehydration operating cost.
Drawings
FIG. 1: the structure schematic diagram of a special device for the deamination and dehydration process for preparing the sodium persulfate (salt) synthetic solution;
FIG. 2: the structure of the air distribution mechanism of the special device is shown schematically;
FIG. 3: the structure of the second air distribution mechanism of the special device is shown schematically.
Detailed Description
The structure of the special device for deamination and dehydration of sodium persulfate (salt) synthetic liquid and the deamination and dehydration process of sodium persulfate (salt) synthetic liquid by using the special device provided by the invention are further described in detail with reference to the accompanying drawings and specific embodiments:
fig. 1 is a schematic structural diagram of a special device for deamination and dehydration of sodium persulfate (salt) synthetic liquid. The structure of the device comprises a reaction kettle 3 which is provided with a material separator 1 and an air distribution mechanism 2 inside, an air blowing mechanism 4 and an air heater 5 with a heating function, wherein the air heater is communicated with the air distribution mechanism in the reaction kettle through a pipeline 6, and an air outlet 7 arranged at the upper end of the reaction kettle is communicated with an absorption mechanism 9 containing dilute sulfuric acid mother liquor through an ammonia pipeline 8.
In the structure constituting the above-described dedicated apparatus,
the absorption mechanism 9 is composed of a circulating reaction tower 15 provided with a liquid inlet, a liquid outlet 10, a liquid outlet 11, an ammonia gas inlet 13 and a vent 14;
the air distribution mechanism can be a round cake-shaped structure which is arranged at the bottom of the reaction kettle and is composed of a panel 17 evenly distributed with air holes 16 and a bottom plate 19 provided with an inlet 18, as shown in fig. 2; or can be formed by a ring-shaped pipe 20 which is fixed on the side wall of the bottom of the reaction kettle and is uniformly provided with air holes 16 as shown in figure 3;
the joint of the exhaust port 7 at the upper end of the reaction kettle and the ammonia gas pipeline 8 is provided with a three-way structure with a valve mechanism.
The process steps of realizing the deamination and dehydration of the sodium persulfate (salt) synthetic solution by using the special device are as follows:
the air is pressurized by the air blower mechanism and then enters the air heater with the heating function for heating, the hot air heated to 80-200 ℃ enters the air distributor of the reaction kettle through the pipeline, is uniformly contacted with the reaction liquid after being distributed by the air holes on the air distributor, and quickly transfers the heat to the reaction liquid, so that the ammonia and the moisture in the reaction liquid are quickly evaporated. And the gas with higher ammonia content enters an ammonia recovery tower through a gas pipeline in the early stage, the gas is circularly absorbed by mother liquor containing dilute sulfuric acid and is changed into ammonium sulfate, then the ammonium sulfate is discharged, and the mother liquor enters an ammonium persulfate electrolysis system. And (4) directly emptying the water vapor and air which do not contain ammonia at the later stage through a three-way valve.
Claims (5)
1. The utility model provides a sodium persulfate (salt) synthetic fluid deamination, dehydration isolated plant which characterized in that: the structure of the device comprises a reaction kettle which is provided with a material separating machine and an air distribution mechanism inside, and an air heater with heating and blowing functions, wherein the air heater is introduced into the reaction kettle through a pipeline and communicated with the air distribution mechanism in the reaction kettle, and an exhaust port arranged at the upper end of the reaction kettle is communicated with an absorption mechanism containing dilute sulfuric acid mother liquor through an ammonia pipeline.
2. The special device for deamination and dehydration of sodium persulfate synthetic liquid as claimed in claim 1, wherein: the absorption mechanism is composed of a circulating reaction tower provided with a liquid inlet, a liquid outlet, an ammonia gas inlet and an exhaust port.
3. The special device for deamination and dehydration of sodium persulfate synthetic liquid as claimed in claim 1, wherein: the air distribution mechanism is a round cake-shaped structure which is arranged at the bottom of the reaction kettle and consists of a panel with air holes uniformly distributed and a bottom plate with an inlet.
4. The special device for deamination and dehydration of sodium persulfate synthetic liquid as claimed in claim 1, wherein: the air distribution mechanism is formed by annular pipes which are fixed on the side wall of the bottom of the reaction kettle and are uniformly provided with air holes.
5. The deamination and dehydration process for the sodium persulfate (salt) synthetic liquid by using the special device as claimed in claim 1 comprises the steps of pressurizing air by an air blower mechanism, heating the air by an air heater with a heating function, feeding hot air heated to 80-200 ℃ into an air distributor of a reaction kettle through a pipeline, uniformly contacting with the reaction liquid after being distributed by the air distributor, and rapidly transmitting heat to the reaction liquid to rapidly evaporate ammonia and moisture in the reaction liquid; the gas with higher ammonia content in the early stage enters an ammonia recovery tower through a gas pipeline, is circularly absorbed by mother liquor containing dilute sulfuric acid and is changed into ammonium sulfate, then is discharged, and the mother liquor enters an ammonium persulfate electrolysis system; and directly emptying the water vapor and air which do not contain ammonia at the later stage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104174722A CN103432974A (en) | 2013-09-14 | 2013-09-14 | Deaminizing and dewatering technology and special device for sodium persulfate (salt) synthetic fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104174722A CN103432974A (en) | 2013-09-14 | 2013-09-14 | Deaminizing and dewatering technology and special device for sodium persulfate (salt) synthetic fluid |
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| CN103432974A true CN103432974A (en) | 2013-12-11 |
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| CN2013104174722A Pending CN103432974A (en) | 2013-09-14 | 2013-09-14 | Deaminizing and dewatering technology and special device for sodium persulfate (salt) synthetic fluid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106687417A (en) * | 2014-09-24 | 2017-05-17 | 技术获胜者有限公司 | Resource reuse-type industrial waste water treatment method and apparatus utilizing oxidizing agent generated by utilizing waste water |
| CN107758624A (en) * | 2017-11-29 | 2018-03-06 | 铜陵华兴精细化工股份有限公司 | A kind of production method for improving sodium peroxydisulfate yield |
| CN112850653A (en) * | 2021-01-29 | 2021-05-28 | 优耐德引发剂合肥有限公司 | Method for increasing yield of sodium persulfate |
| CN112915967A (en) * | 2021-03-22 | 2021-06-08 | 南京科盛环保技术有限公司 | Modified bioactive carbon adsorbent for removing Cr (VI), and preparation method, device and application thereof |
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Patent Citations (9)
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| US4152409A (en) * | 1977-02-04 | 1979-05-01 | Dowa Mining Co., Ltd. | Method for carrying out air oxidation and for adding fine bubbles to a liquid |
| CN1220969A (en) * | 1997-12-24 | 1999-06-30 | 三菱瓦斯化学株式会社 | Process for producing sodium persulfate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106687417A (en) * | 2014-09-24 | 2017-05-17 | 技术获胜者有限公司 | Resource reuse-type industrial waste water treatment method and apparatus utilizing oxidizing agent generated by utilizing waste water |
| CN106687417B (en) * | 2014-09-24 | 2019-12-24 | 技术获胜者有限公司 | Method and apparatus for treating industrial waste water using oxidizing agent produced from waste water |
| CN107758624A (en) * | 2017-11-29 | 2018-03-06 | 铜陵华兴精细化工股份有限公司 | A kind of production method for improving sodium peroxydisulfate yield |
| CN112850653A (en) * | 2021-01-29 | 2021-05-28 | 优耐德引发剂合肥有限公司 | Method for increasing yield of sodium persulfate |
| CN112915967A (en) * | 2021-03-22 | 2021-06-08 | 南京科盛环保技术有限公司 | Modified bioactive carbon adsorbent for removing Cr (VI), and preparation method, device and application thereof |
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Application publication date: 20131211 |