CN110078039A - A kind of low-concentration phosphorus-containing wastewater step produces the method and device of calcium hydrophosphate fodder - Google Patents
A kind of low-concentration phosphorus-containing wastewater step produces the method and device of calcium hydrophosphate fodder Download PDFInfo
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- CN110078039A CN110078039A CN201910483493.1A CN201910483493A CN110078039A CN 110078039 A CN110078039 A CN 110078039A CN 201910483493 A CN201910483493 A CN 201910483493A CN 110078039 A CN110078039 A CN 110078039A
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- order reaction
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
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Abstract
The invention discloses the method and devices that a kind of low-concentration phosphorus-containing wastewater step produces calcium hydrophosphate fodder, include level Four processing step: (1) low-concentration phosphorus-containing wastewater being carried out coagulation, clear liquid enters second order reaction；(2) calcium hydroxide control pH value is added and carries out second order reaction in 5.6-6.2, solid is calcium hydrophosphate fodder product after sedimentation, and supernatant enters back into third-order reaction；(3) pH value is adjusted to 2-4 back end hydrogenation calcium oxide and is reacted, and controlling pH solid after 5.6-6.0, sedimentation is calcium hydrophosphate fodder product, and supernatant enters back into next stage.(4) solid of the calcium hydroxide control pH after 11-13, sedimentation is added and enters raw material of first reactive tank as first order reaction after concentration, clear liquid adjustment pH carries out outlet between 6-9.Phosphrus reagent can be made to improve 5% using method and device of the invention, raw material consumption is reduced.
Description
Technical field
The present invention relates to low-concentration phosphorus-containing wastewater process for producing field, especially low-concentration phosphorus-containing wastewater step produces feed
The method and device of calcium hydrophosphate.
Background technique
Now in the treatment process of current high-density phosphorus, fluorine acid waste water, second level lime acid-base neutralization method is mostly used.And locate
A large amount of sewage slag will be generated after reason waste water, and sewage slag can only be used as phosphate fertilizer using slag dam landfill or after drying at present
Part additive use.
But these methods all can not thoroughly use sewage slag, especially a large amount of phosphorus contained in slag provides
Source not only causes the waste of resource, while may cause the pollution of environment.
Summary of the invention
The purpose of the present invention is to solve the shortcomings of the prior art place optimizes, a kind of low-concentration phosphorus-containing wastewater is provided
Step produces the method and device of calcium hydrophosphate fodder, to improve phosphrus reagent, reduces lime raw material consumption.
Technical solution of the present invention: a kind of method that low-concentration phosphorus-containing wastewater step produces calcium hydrophosphate fodder includes
Level Four processing step: (1) low-concentration phosphorus-containing wastewater is added calcium hydroxide and carries out coagulation, treated, and slag send cinder field, clearly
Liquid enters second order reaction；(2) in the second order reaction stage, calcium hydroxide control pH value appropriate is added in 5.6-6.2, reacts 1-2
Carry out settlement treatment after hour, the solid after sedimentation is then calcium hydrophosphate fodder product, into drying system, supernatant again into
Enter the third stage of reaction；(3) pH value is first adjusted to 2-4 in the third stage of reaction, adds calcium hydroxide and carries out third step
Processing, controlling solid of the pH value after 5.6-6.0, sedimentation is then calcium hydrophosphate fodder product, into drying system, supernatant
Enter back into next stage.(4) calcium hydroxide is added and carries out the processing of the 4th step, controls pH value in 11-13, slurry is settled, settle
Solid afterwards enters the first reactive tank as the raw material of first order reaction after concentration and uses or use as other raw materials, clear liquid
Be adjusted pH value and carry out outlet between 6-9, outer drainage index phosphorus in 0.2mg/l, fluorine in 5mg/l hereinafter, well below
National emission standard.
A kind of low-concentration phosphorus-containing wastewater step produces the device of calcium hydrophosphate fodder, it is sunk by first order reaction slot, first
Slot, second order reaction slot, the second subsider, third-order reaction slot, third subsider, fourth-order reaction slot, the 4th subsider, dry system drop
System and pipeline composition, wherein the entrance of first order reaction slot connects low-concentration phosphorus-containing wastewater pipe, and the outlet conduit of first order reaction slot connects
Connect the entrance of the first subsider, the entrance of the outlet connection second order reaction slot of the first subsider, the outlet conduit of second order reaction slot
Connect the entrance of the second subsider, the entrance of the outlet connection third-order reaction slot of the second subsider, the outlet of third-order reaction slot
Road connects the entrance of third subsider, the entrance of the outlet connection fourth-order reaction slot of third subsider, the outlet of fourth-order reaction slot
Connect the entrance of the 4th subsider；4th subsider has pipeline to be connected to first order reaction slot；First subsider has pipeline company
It is connected to cinder field；Second subsider, third subsider have pipeline to be connected to drying system.
The low-concentration phosphorus-containing wastewater step is produced in the device of calcium hydrophosphate fodder, the first order reaction slot, two
Order reaction slot, third-order reaction slot are designed with pH meter and feed opening on fourth-order reaction slot.
Method of the invention proposes the thinking that phosphorus-containing wastewater step produces calcium hydrophosphate fodder, while in original device
On the basis of carried out corresponding optimization, change at low cost, so that phosphrus reagent is improved 5% or so after implementation, raw material consumption is dropped
It is low.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is structural schematic diagram of the invention；
In figure: 1- first order reaction slot, the first subsider of 2-, 3- second order reaction slot, the second subsider of 4-, 5- third-order reaction slot, 6-
Third subsider, 7- fourth-order reaction slot, the 4th subsider of 8-, 9- cinder field；10- drying system.
Specific embodiment
A kind of method that low-concentration phosphorus-containing wastewater step produces calcium hydrophosphate fodder includes level Four processing step: (1) will
Low-concentration phosphorus-containing wastewater is added calcium hydroxide and carries out coagulation, and treated, and slag send cinder field, and clear liquid enters second order reaction；(2)
In the second order reaction stage, calcium hydroxide control pH value appropriate is added in 5.6-6.2, reaction carried out settlement treatment after 1-2 hours,
Solid after sedimentation is then calcium hydrophosphate fodder product, and into drying system, supernatant enters back into the third stage of reaction；(3)
PH value is first adjusted to 2-4 in the third stage of reaction, calcium hydroxide is added and carries out third step processing, controls pH value in 5.6-
6.0, the solid after sedimentation is then calcium hydrophosphate fodder product, and into drying system, supernatant enters back into next stage.(4)
Calcium hydroxide is added and carries out the processing of the 4th step, controls pH value in 11-13, slurry is settled, the solid after sedimentation is after concentration
Raw material into the first reactive tank as first order reaction uses, and clear liquid is adjusted pH value and carries out outlet, outlet between 6-9
Water index phosphorus is in 0.2mg/l, and fluorine is in 5mg/l hereinafter, well below national emission standard.
A kind of low-concentration phosphorus-containing wastewater step produces the device of calcium hydrophosphate fodder, it is sunk by first order reaction slot 1, first
Slot 2, second order reaction slot 3, the second subsider 4, third-order reaction slot 5, third subsider 6, fourth-order reaction slot 7, the 4th subsider drop
8, drying system 10 and pipeline composition, wherein the entrance of first order reaction slot 1 connects low-concentration phosphorus-containing wastewater pipe, first order reaction slot 1
Outlet conduit connect the entrance of the first subsider 2, the entrance of the outlet connection second order reaction slot 3 of the first subsider 2, second level is anti-
The outlet conduit of slot 3 is answered to connect the entrance of the second subsider 4, the outlet of the second subsider 4 connects the entrance of third-order reaction slot 5,
The entrance of the outlet conduit connection third subsider 6 of third-order reaction slot 5, the outlet connection fourth-order reaction slot 7 of third subsider 6
Entrance, the entrance of the 4th subsider 8 of outlet connection of fourth-order reaction slot 7；4th subsider 8 has pipeline to be connected to first order reaction slot
1；First subsider 2 has pipeline to be connected to cinder field 9；Second subsider 4, third subsider 6 have pipeline to be connected to
Drying system 10.
The low-concentration phosphorus-containing wastewater step is produced in the device of calcium hydrophosphate fodder, the first order reaction slot 1, two
Order reaction slot 3, third-order reaction slot 5 are designed with pH meter and feed opening on fourth-order reaction slot 7.
Claims (3)
1. a kind of method that low-concentration phosphorus-containing wastewater step produces calcium hydrophosphate fodder, it is characterized in that being walked comprising level Four processing
It is rapid: (1) calcium hydroxide to be added in low-concentration phosphorus-containing wastewater and carry out coagulation, treated, and slag send cinder field, and clear liquid enters second level
Reaction；(2) in the second order reaction stage, calcium hydroxide control pH value appropriate is added in 5.6-6.2, reaction carries out after 1-2 hours
Settlement treatment, the solid after sedimentation is then calcium hydrophosphate fodder product, and into drying system, supernatant enters back into third reaction
Stage；(3) pH value is first adjusted to 2-4 in the third stage of reaction, adds calcium hydroxide and carry out third step processing, controls pH
Being worth the solid after 5.6-6.0, sedimentation is then calcium hydrophosphate fodder product, and into drying system, supernatant enters back into next
Stage；(4) calcium hydroxide is added and carries out the processing of the 4th step, controls pH value in 11-13, slurry is settled, the solid warp after sedimentation
It crosses and uses into the first reactive tank as the raw material of first order reaction after concentration or used as other raw materials, clear liquid is adjusted pH
Value carries out outlet between 6-9, and outer drainage index phosphorus is in 0.2mg/l, and fluorine is in 5mg/l or less.
2. a kind of low-concentration phosphorus-containing wastewater step produces the device of calcium hydrophosphate fodder, it is characterized in that it is by first order reaction slot
(1), the first subsider (2), second order reaction slot (3), the second subsider (4), third-order reaction slot (5), third subsider (6), four
Order reaction slot (7), the 4th subsider (8), drying system (10) and pipeline composition, wherein the entrance connection of first order reaction slot (1)
Low-concentration phosphorus-containing wastewater pipe, the entrance of the outlet conduit connection the first subsider (2) of first order reaction slot (1), the first subsider (2)
Outlet connection second order reaction slot (3) entrance, second order reaction slot (3) outlet conduit connection the second subsider (4) entrance,
The outlet conduit connection third of the entrance of outlet connection third-order reaction slot (5) of second subsider (4), third-order reaction slot (5) is heavy
The entrance of slot (6), the entrance of outlet connection fourth-order reaction slot (7) of third subsider (6), the outlet of fourth-order reaction slot (7) drop
Connect the entrance of the 4th subsider (8)；4th subsider (8) has pipeline to be connected to first order reaction slot (1)；First subsider
(2) pipeline is connected to cinder field (9)；Second subsider (4), third subsider (6) have pipeline to be connected to drying system
(10).
3. low-concentration phosphorus-containing wastewater step according to claim 2 produces the device of calcium hydrophosphate fodder, feature exists
In be designed on the first order reaction slot (1), second order reaction slot (3), third-order reaction slot (5), fourth-order reaction slot (7) pH meter and plus
Material mouth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910483493.1A CN110078039B (en) | 2019-06-04 | 2019-06-04 | Method and device for preparing feed-grade calcium hydrophosphate in low-concentration phosphorus-containing wastewater step manner |
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| CN201910483493.1A CN110078039B (en) | 2019-06-04 | 2019-06-04 | Method and device for preparing feed-grade calcium hydrophosphate in low-concentration phosphorus-containing wastewater step manner |
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| CN110078039A true CN110078039A (en) | 2019-08-02 |
| CN110078039B CN110078039B (en) | 2023-09-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115108541A (en) * | 2022-07-14 | 2022-09-27 | 瓮福（集团）有限责任公司 | Method for recycling ultralow-concentration phosphorus-containing wastewater |
| CN115180602A (en) * | 2022-07-05 | 2022-10-14 | 生态环境部南京环境科学研究所 | Preparation method for preparing calcium hydrophosphate from phosphorus-containing wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115180602A (en) * | 2022-07-05 | 2022-10-14 | 生态环境部南京环境科学研究所 | Preparation method for preparing calcium hydrophosphate from phosphorus-containing wastewater |
| CN115108541A (en) * | 2022-07-14 | 2022-09-27 | 瓮福（集团）有限责任公司 | Method for recycling ultralow-concentration phosphorus-containing wastewater |
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| CN110078039B (en) | 2023-09-22 |
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