CN204058132U - A kind of pre-treatment high phosphorus waste water removes the process system of total phosphorus - Google Patents
A kind of pre-treatment high phosphorus waste water removes the process system of total phosphorus Download PDFInfo
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- CN204058132U CN204058132U CN201420526525.4U CN201420526525U CN204058132U CN 204058132 U CN204058132 U CN 204058132U CN 201420526525 U CN201420526525 U CN 201420526525U CN 204058132 U CN204058132 U CN 204058132U
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Abstract
The utility model discloses a kind of pre-treatment high phosphorus waste water and remove the process system of total phosphorus, mainly comprise the sewage storage pond (1) of configuration mutually, regulate settling tank (2), many group chemical reaction ponds and organize high efficiency clarification tank, Buffer Pool (7), coagulation agitated pool (10), solid-liquid separating equipment (11) more, white clay concentrates storage pool (12), yellow mud concentrates storage pool (13), device for dehydrating sladge waste (14), aerating apparatus (15).The utility model adopts the art breading high-concentration phosphorus-containing wastewater that " aeration homogenizing+chemical precipitation+chemical oxidation+coagulation complex-precipitation+solid-liquid separation " is core, phosphorus-containing wastewater gradation after aeration homogenizing, preoxidation adds the chemical agents such as calcium salt, acid, oxygenant, complexing agent, realize repeatedly being oxidized, precipitating, complexing coagulating, and after carrying out repeatedly solid-liquid separation, ensure that about 10mg/L is down to by water outlet total phosphorus, present treatment system is specially adapted to the pre-treatment of high-concentration phosphorus-containing wastewater.
Description
Technical field
The utility model relates to technique for treating industrial wastewater, particularly relates to the process system that a kind of pre-treatment high phosphorus waste water removes total phosphorus.
Background technology
Phosphorus pollutes can cause to human body, marine organisms, soil, water body the harm that multiple degree is different, especially in water body with orthophosphate ions, polymeric phosphate and organo phosphorous compounds form exist phosphorus, total phosphorus concentration is when static water body is more than 86 μ g/L, namely judge that this water body is eutrophication, polluted.The pernicious phenomenons such as phosphorus excessive in water body will cause red tide, algal bloom, and fishes and shrimps are dead.
The chemical agents such as sulfuric acid, nitric acid, phosphoric acid, hypophosphite can be used in a large number in electronics, electroplating industry, printed circuit board industry, Waste Acid From Hua Cheng Foil waste water and some noble metal catalyst production processes, make the hypophosphite in discharged high-concentration phosphorus-containing wastewater, phosphite becomes a difficult point in wastewater processing technology.What enter water body is rich in phosphoric acid salt, the algae excess growth in water body can be impelled when illumination and other envrionment conditionss are suitable for, in algae death subsequently and consequent heterotrophic microorganism Metabolic activity, dissolved oxygen in water body is probably depleted, thus causes Water quality to worsen and water ecological environment structure deteriorate.
At present conventional phosphorus-contained wastewater treating method is chemical precipitation method, namely regulates phosphorus-containing wastewater pH value with lime, and add that metal supplementary set agent etc. is carried out neutralizing, coagulation, flocculation, precipitation.In addition ion exchange method, absorption method, electroosmose process, evaporation concentration method and reverse osmosis method is also had, but the waste water after these method process all cannot reach desirable phosphor-removing effect, the outer row of these phosphorus-containing wastewaters without process up to standard can cause environmental pollution, and causes the wasting of resources.In addition, some industrial phosphorus-containing wastewater treatment difficulty is higher, in waste liquid except ortho phosphorous acid and phosphorous acid need oxidation, still there is a large amount of organic complexing agent, high chemical oxygen demand value (COD) also needs to consume a large amount of oxygenant, therefore added disperse oxidant strength, usually can not meet the oxidation requirements of ortho phosphorous acid and phosphorous acid, so removal effect is not good.Industry generally adopts the method process high phosphorus waste water such as Fenton (Fenton reagent), molysite, aluminate coagulating, but its stability is difficult to control, and discharge water usually also cannot be up to standard.
Therefore, find the process system that a kind of pre-treatment high phosphorus waste water removes total phosphorus, to overcome the deficiency of the coagulation methods such as Fenton (Fenton reagent), molysite, aluminium salt, the removal effect simultaneously improving total phosphorus is significant.
Utility model content
Technical problem to be solved in the utility model is to provide the system that a kind of pre-treatment high phosphorus waste water removes total phosphorus, especially provide a kind of and remove total phosphorus process system based on chemical method multiple spot dosing pre-treating high concentration phosphorus-containing wastewater, overcome that prior art treatment effect is undesirable, the shortcoming of high cost, effectively can eliminate the phosphorus content in waste water, be process the more satisfactory method of high-concentration phosphorus-containing wastewater at present.
The utility model is based on following principle:
Chemical method once can add treatment agent in theory, and the utility model is selected to add the raw material medicaments such as calcium chloride, acid, oxygenant several times, is in order to cost-saving and reinforcement treatment effect.Chemical precipitation dephosphorization is completed by chemical precipitation process, by adding inorganic metal salt medicament in sewage, deliquescent salt in itself and sewage, after phosphoric acid salt, phosphite mixing, form the material of particulate state, non-solubility, what this process related to is so-called phase transition behavior, and reactional equation is such as formula 1.In fact after adding chemical agent, what carry out in sewage is not only precipitating reaction, also carries out chemical flocculation reaction simultaneously.
According to water quality analysis, chemical precipitation is considered to adopt calcium salt to be used as precipitating medicament.Under strongly alkaline conditions, the formation of Arizona bacilli, calcium phosphate is undertaken by reaction formula 1:
3Ca
2++ 2PO3
3-→ Ca
3(PO
3)
2↓ (pH>=8.5) formula 1
3Ca
2++2PO4
3-→Ca
3(PO
4)
2↓
Research shows, independent oxygenant, to total phosphorus not removal effect significantly, can only become orthophosphoric acid salt part hypophosphite, oxidation of phosphite, and the removal effect of independent FeSO4 to phosphorus is also lower, and it is only about 10-20% to removal rate of phosphate in water.But the technique of oxygenant-FeSO4 coupling has the number of mechanisms such as oxidation, absorption and complex-precipitation, show the usefulness of good removal water pollutant, experiment display, KMnO4 and FeSO4 reaction meeting in-situ preparation nascent state iron and manganese oxides, wherein the introducing of Mn oxide to phosphatic removal effect clearly.Chemical equation is reaction formula 2:
3Fe
2++ MnO
4 -+ 5H
2o=3Fe (OH)
3↓+MnO
2+ H
+formula 2
KMnO
4-FeSO
4technique increases, along with oxygenant and FeSO with the increase of molysite throwing amount the removal effect of phosphorus
4the increase of mol ratio, increases gradually to the clearance of phosphorus.
Experiment shows, mineral ion common in water is as Ca
2+existence, on the one hand can improve KMnO
4-FeSO
4the surperficial zeta-potential of the floc particle thing solid phase iron and manganese oxides that technique is formed and the repulsion that reduces between phosphorus and solid phase iron and manganese oxides, be beneficial to the Adsorption of phosphorus; On the other hand, under higher solution ph condition, the transfer having the solid iron oxide compound be beneficial in solution of Ca2+, adds the significant quantity of the solid phase iron and manganese oxides for Phosphate Sorption, affects KMnO by number of mechanisms
4-FeSO
4and Fe
2(SO
4)
3cosedimentation removes phosphor-removing effect.KMnO
4-FeSO
4technique to the removal effect of phosphorus far away higher than one matter each in technique to the clearance of phosphorus, Technical expression goes out good Removal, and there is the advantages such as efficient, economic, convenient, be the Technology of applicable China current polluted water body deeply depollution.
The present invention take calcium salt as precipitation agent, is added by excessive, generates the Arizona bacilli that utility value is higher.Because Arizona bacilli is slightly soluble material, and calcium phosphate is insoluble substance, for reaching the standard of draining TP (total phosphorous)≤10mg/L, with chemical oxidization method, remaining oxidation of phosphite must be become orthophosphoric acid salt, then forming calcium phosphate precipitation with excessive calcium chloride in water and removing.
Technical problem to be solved in the utility model is achieved through the following technical solutions:
Pre-treatment high phosphorus waste water removes the system of total phosphorus, described system comprise configuration mutually sewage storage pond 1, regulate settling tank 2, one or more groups chemical reaction pond, one or more groups settling pond, coagulation agitated pool 10, solid-liquid separating equipment 11, white clay concentrates storage pool 12, yellow mud concentrates storage pool 13, device for dehydrating sladge waste 14, aerating apparatus 15.
Wherein, described chemical reaction pond comprises the first chemical reaction pond 3, second chemical reaction pond 5 and the 3rd chemical reaction pond 8, and described settling pond comprises the first high efficiency clarification tank 4, second high efficiency clarification tank 6 and third high effect settling pond 9;
Described sewage storage pond 1 is connected with adjustment settling tank 2 by upflow tube, and be provided with boring aeration pipe bottom sewage storage pond 1, described boring aeration pipe is connected with aerating apparatus 15;
Described adjustment settling tank 2 is connected with the first chemical reaction pond 3 by one-level sewage pump, and described first chemical reaction pond 3, first high efficiency clarification tank 4, second chemical reaction pond 5, second high efficiency clarification tank 6 is connected successively by upflow tube; Buffer Pool 7 is configured with between the second high efficiency clarification tank 6 and the 3rd chemical reaction pond 8;
Described 3rd chemical reaction pond 8, third high effect settling pond 9, coagulation agitated pool 10, solid-liquid separating equipment 11 are connected successively by upflow tube; Be provided with boring aeration pipe bottom 3rd chemical reaction pond 8, boring aeration pipe is connected with aerating apparatus 15;
Described white clay concentrates storage pool 12 front end and is connected with the first high efficiency clarification tank 4, and described yellow mud concentrates that storage pool 13 front end imitates settling pond 9 respectively with the second high efficiency clarification tank 6, third high, device for dehydrating sladge waste 14, solid-liquid separating equipment 11 are connected;
Described white clay concentrates storage pool 12, yellow mud concentrates storage pool 13 and device for dehydrating sladge waste 14 is connected to adjustment settling tank 2 respectively by clear liquid pipeline.
Preferably, described white clay concentrates storage pool 12, yellow mud concentrates storage pool 13 backend arrangement device for dehydrating sladge waste 14.
In the utility model, described device for dehydrating sladge waste 14 be selected from plate-and-frame filter press, spiral dewater one or more.
In the utility model, described solid-liquid separating equipment 11 is selected from one or more the series combination in air-dissolving air-float equipment, inclined-plate clarifying basin.
According to another preferred embodiment, described first chemical reaction pond 3, second chemical reaction pond 5, the 3rd chemical reaction pond 8, coagulation agitated pool 10 are configured with dosing volume pump respectively mutually.
What distinguish with prior art is, in prior art, the clear liquid of device for dehydrating sladge waste 14 usually turns back to yellow mud by pipeline and concentrates storage pool 13, and in the utility model, containing chemical agents such as excessive calcium salts in water after the supernatant liquor produced due to device for dehydrating sladge waste 14 or solid-liquid separation, therefore no longer the clear liquid of device for dehydrating sladge waste 14 is delivered to yellow mud and concentrate storage pool 13, play saving added amount of chemical, there is the meaning reducing running cost.
On the other hand, respectively white clay is concentrated storage pool 12 by clear liquid pipeline, yellow mud concentrates storage pool 13 and device for dehydrating sladge waste 14 is connected to adjustment settling tank 2, due in the water after white clay concentrates storage pool 12, yellow mud concentrates storage pool 13 and device for dehydrating sladge waste 14 produces supernatant liquor or solid-liquid separation containing chemical agents such as excessive calcium salts, these supernatant liquors or who are transported to and regulate settling tank 2 to be conducive to saving medicament, the medicaments such as unnecessary calcium salt can obtain and make full use of.
In the utility model, mutually configuration is referred to and to be interconnected by water pipe and pump.
Compared with prior art, system of the present utility model has following advantage:
1. total tp removal rate is high, and under identical added amount of chemical condition, gradation divides multi-point to add reagent, can reduce the consumption of precipitin reaction medicament, saves running cost.
2. running cost is low, and processing costs economizes, and has obvious economic and social benefit.
3. adopt system of the present utility model, when the chemical agent such as calcium salt, acid, oxygenant, complexing agent added, effectively can realize repeatedly being oxidized, precipitate, complexing coagulating, and after carrying out repeatedly solid-liquid separation, ensure that water outlet total phosphorus (TP) is down to about 10mg/L by 2000mg/L, clearance is up to 99%, and pretreated waste water directly can enter city planting ductwork and carry out biochemical treatment further.
4. effectively realize the recovery of resource, effectively eliminate the phosphorus content in waste water, greatly reduce the processing load of municipal wastewater.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described further.
Fig. 1 is the utility model process flow sheet
Fig. 2 is the utility model process system structural representation
In figure: 1-sewage storage pond, 2-regulates settling tank, 3-first chemical reaction pond, 4-first high efficiency clarification tank, 5-second chemical reaction pond, 6-second high efficiency clarification tank, 7-Buffer Pool, 8-the 3rd chemical reaction pond, 9-third high effect settling pond, 10-coagulation agitated pool, 11-solid-liquid separating equipment, 12-white clay concentrates storage pool, and 13-yellow mud concentrates storage pool, 14-device for dehydrating sladge waste, 15-aerating apparatus.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail, but not as to restriction of the present utility model.
System as described in Figure 1, comprises sewage storage pond 1, adjustment settling tank 2, first chemical reaction pond 3, first high efficiency clarification tank 4, second chemical reaction pond 5, second high efficiency clarification tank 6, Buffer Pool 7, the 3rd chemical reaction pond 8, third high effect settling pond 9, coagulation agitated pool 10, solid-liquid separating equipment 11, white clay concentrates storage pool 12, yellow mud concentrates storage pool 13, device for dehydrating sladge waste 14, aerating apparatus 15.
Wherein, sewage storage pond 1 is connected with adjustment settling tank 2 by upflow tube, regulates settling tank 2 to be connected with the first chemical reaction pond 3 by one-level sewage pump.First chemical reaction pond 3, first high efficiency clarification tank 4, second chemical reaction pond 5, second high efficiency clarification tank 6 is connected successively by upflow tube.Second high efficiency clarification tank 6 is connected to Buffer Pool 7, and then by upflow tube successively to the 3rd chemical reaction pond 8, third high effect settling pond 9, coagulation agitated pool 10, solid-liquid separating equipment 11.
White clay in this system concentrates storage pool 12 front end and is connected with the first high efficiency clarification tank 4; Yellow mud concentrates that storage pool 13 front end imitates settling pond 9 respectively with the second high efficiency clarification tank 6, third high, device for dehydrating sladge waste 14, solid-liquid separating equipment 11 are connected.White clay concentrates storage pool 12 and yellow mud and concentrates storage pool 13 rear end and configure spiral dewater respectively as device for dehydrating sladge waste 14.
Wherein, be respectively equipped with boring aeration pipe bottom sewage storage pond 1 He bottom the 3rd chemical reaction pond 8, be connected respectively to aerating apparatus 15.
Each group chemical reaction pond and coagulation agitated pool are respectively equipped with dosing volume pump.
This system can complete waste water by following steps and remove total phosphorus, to obtain the waste water reaching the standard directly got rid of:
(1) first time chemical precipitation: high-concentration phosphorus-containing wastewater enters sewage storage pond 1 and enter adjustment settling tank 2 after industrial wind aeration homogenizing, preoxidation; The solid waste regulating settling tank 2 to produce reclaims, and supernatant liquor is promoted to the first chemical reaction pond 3 through one-level lift pump, adds appropriate hydrochloric acid by dosing volume pump, makes wastewater pH control at 8.5-10.0, adds excess chlorination calcium.
Abundant stirring, phosphate radical in waste water, orthophosphite and calcium ion are fully reacted and produces calcium phosphate, Arizona bacilli precipitation, water outlet enters the first effect settling pond 4 and carries out primary chemical precipitation, calcium phosphate, the Arizona bacilli white clay of precipitation enter white clay by run by gravity and concentrate storage pool 12, and the product water of precipitation process enters the second chemical reaction pond 5 for the first time.
(2) second time chemical precipitation: simultaneously add by hydrochloric acid, potassium permanganate, copperas solution in the pending water of described second chemical reaction pond 5.Control flow by volume pump, make wastewater pH control at 3.5-4.5, carry out secondary chemical precipitation, oxidation, complexing coagulating.Reaction water outlet overflow enters the second high efficiency clarification tank 6, and the yellow mud of precipitation pumps into yellow mud and concentrates storage pool 13, and supernatant liquor enters Buffer Pool 7 by run by gravity.
(3) third time chemical precipitation: the sewage of Buffer Pool 7 is promoted to the 3rd chemical reaction pond 8 by two-stage hoisting pump; Before entering described 3rd chemical reaction pond 8, add appropriate potassium permanganate by the dosing volume pump mutually configured.After aeration mixing, carry out oxidizing reaction at the 3rd chemical reaction pond 8; Reacted sewage flows into third high effect settling pond 9 by gravity, and the yellow mud of formation enters yellow mud equally and concentrates storage pool 13, and supernatant liquor enters coagulation agitated pool 10 by run by gravity; In described coagulation agitated pool 10, supernatant liquor mixes with sodium hydroxide, polymerize aluminum chloride, polyacrylamide, enter solid-liquid separating equipment 11 after mixing and carry out solid-liquid separation removal suspended substance, so far, process completes, and last product water can enter city planting ductwork and carry out biochemical treatment further.
(4) mud-water separation: described white clay concentrate storage pool 12 and yellow mud concentrate storage pool 13 concentrated after mud enter device for dehydrating sladge waste 14, dewater, mud can be reached and recycle, save resource.
Specific experiment
In the sewage of Heilungkiang refinery company polyacrylamide device discharge, phosphorus content is high, and its total phosphorus (TP) concentration reaches about 1800mg/L, after being discharged to downstream wastewater treatment plant, impacting serious, cause sewage always to arrange a mouthful phosphorus content severe overweight to it.
For the phosphorus-containing wastewater of polyacrylamide device discharge, Project design processing power: 240m
3/ d (closes 10m
3/ h).Through traditional process system process, select to add excessive calcium chloride precipitation in conjunction with Chlorine Dioxide Oxidation processing method, after process, water quality is as follows: total phosphorus >=50mg/L, below standard, does not reach emission standard.
Thereafter, adopt chemical method gradation to add calcium chloride, potassium permanganate, ferrous sulfate by said system, realize secondary oxidation, precipitation, complexing coagulating, due to KMnO
4-FeSO
4the solid phase iron and manganese oxides that process integration is formed has very strong complex-precipitation and adsorbing acting in conjunction, and process operation is respond well, and water outlet total phosphorus (TP) is down to about 10mg/L by 2000mg/L.
This process operation is adopted to debug each cell processing effectiveness results as follows:
Above-described embodiment, the one of the embodiment just selected by the utility model, and the restriction not to embodiment.For a person skilled in the art, other multi-form variation can also be made on the basis of the above description.The apparent change of amplifying out thus and replacement all should be included in protection domain of the present utility model.
Claims (5)
1. the system of a pre-treatment high phosphorus waste water removal total phosphorus, described system comprises the sewage storage pond (1) of configuration mutually, regulate settling tank (2), one or more groups chemical reaction pond, one or more groups settling pond, coagulation agitated pool (10), airfloat equipment (11), white clay concentrates storage pool (12), yellow mud concentrates storage pool (13), device for dehydrating sladge waste (14), aerating apparatus (15), it is characterized in that described chemical reaction pond comprises the first chemical reaction pond (3), second chemical reaction pond (5) and the 3rd chemical reaction pond (8), described settling pond comprises the first high efficiency clarification tank (4), second high efficiency clarification tank (6) and third high effect settling pond (9),
Described sewage storage pond (1) is connected with adjustment settling tank (2) by upflow tube, and sewage storage pond (1) bottom is provided with boring aeration pipe, and described boring aeration pipe is connected with aerating apparatus (15);
Described adjustment settling tank (2) is connected with the first chemical reaction pond (3) by one-level sewage pump, and described first chemical reaction pond (3), the first high efficiency clarification tank (4), the second chemical reaction pond (5), the second high efficiency clarification tank (6) are connected successively by upflow tube; Buffer Pool (7) is configured with between the second high efficiency clarification tank (6) and the 3rd chemical reaction pond (8);
Described 3rd chemical reaction pond (8), third high effect settling pond (9), coagulation agitated pool (10), solid-liquid separating equipment (11) are connected successively by upflow tube; 3rd chemical reaction pond (8) bottom is provided with boring aeration pipe, and boring aeration pipe is connected with aerating apparatus (15);
Described white clay concentrates storage pool (12) front end and is connected with the first high efficiency clarification tank (4), and described yellow mud concentrates that settling pond (9) is imitated with the second high efficiency clarification tank (6), third high respectively in storage pool (13) front end, solid-liquid separating equipment (11) is connected;
Described white clay concentrates storage pool (12), yellow mud concentrates storage pool (13) and device for dehydrating sladge waste (14) is connected to adjustment settling tank (2) respectively by clear liquid pipeline.
2. pre-treatment high phosphorus waste water according to claim 1 removes the system of total phosphorus, and it is characterized in that described white clay concentrates storage pool (12), yellow mud concentrates storage pool (13) backend arrangement has device for dehydrating sladge waste (14).
3. pre-treatment high phosphorus waste water according to claim 2 removes the system of total phosphorus, it is characterized in that described device for dehydrating sladge waste (14) is selected from plate-and-frame filter press, spiral dewater one or more.
4. pre-treatment high phosphorus waste water according to claim 1 removes the system of total phosphorus, it is characterized in that described solid-liquid separating equipment (11) is selected from one or more the series combination in air-dissolving air-float equipment, inclined-plate clarifying basin.
5. pre-treatment high phosphorus waste water according to claim 1 removes the system of total phosphorus, it is characterized in that described first chemical reaction pond (3), the second chemical reaction pond (5), the 3rd chemical reaction pond (8), coagulation agitated pool (10) are configured with dosing volume pump respectively mutually.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106336059A (en) * | 2016-10-19 | 2017-01-18 | 泰州新安阻燃材料有限公司 | Method for treating wastewater of phosphate fire retardant production process |
| CN110759514A (en) * | 2019-08-16 | 2020-02-07 | 上海世渊环保科技有限公司 | High-concentration phosphorus-containing wastewater treatment method and treatment system for phenolic resin enterprises |
| CN114408890A (en) * | 2022-03-14 | 2022-04-29 | 上海太洋科技有限公司 | Method for preparing optical calcium metaphosphate from phosphorus-containing waste liquid |
-
2014
- 2014-09-12 CN CN201420526525.4U patent/CN204058132U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106336059A (en) * | 2016-10-19 | 2017-01-18 | 泰州新安阻燃材料有限公司 | Method for treating wastewater of phosphate fire retardant production process |
| CN106336059B (en) * | 2016-10-19 | 2019-06-14 | 泰州瑞世特新材料有限公司 | The processing method of organic phosphate flame-retardant agent producing process waste water |
| CN110759514A (en) * | 2019-08-16 | 2020-02-07 | 上海世渊环保科技有限公司 | High-concentration phosphorus-containing wastewater treatment method and treatment system for phenolic resin enterprises |
| CN114408890A (en) * | 2022-03-14 | 2022-04-29 | 上海太洋科技有限公司 | Method for preparing optical calcium metaphosphate from phosphorus-containing waste liquid |
| CN114408890B (en) * | 2022-03-14 | 2023-08-04 | 上海太洋科技有限公司 | Method for preparing optical grade calcium metaphosphate from phosphorus-containing waste liquid |
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