CN106396170B - Aeration-free wastewater air-flotation complexing agent, preparation method and application method and device - Google Patents

Aeration-free wastewater air-flotation complexing agent, preparation method and application method and device Download PDF

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Publication number
CN106396170B
CN106396170B CN201610907261.0A CN201610907261A CN106396170B CN 106396170 B CN106396170 B CN 106396170B CN 201610907261 A CN201610907261 A CN 201610907261A CN 106396170 B CN106396170 B CN 106396170B
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wastewater
coagulant
linking agent
cross
mixer
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CN106396170A (en
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张棋
徐明飞
朱晓明
孙彩霞
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Zhejiang Academy of Agricultural Sciences
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Zhejiang Academy of Agricultural Sciences
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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
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • 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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
    • C02F2103/325—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from processes relating to the production of wine products

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention discloses a non-aeration type wastewater air-flotation complexing agent and a preparation method and an application device thereof, belonging to the technical field of wastewater treatment, wherein the complexing agent comprises 20-50% of a coagulant by mass, which comprises ferric salt, magnesium salt and polyaluminium chloride; 3-5% of cross-linking agent, the application method comprises four processes of preparing materials, adding coagulant, adding cross-linking agent and separating, and the application device comprises a water pump, a first mixer, a buffer, a second mixer, a separation barrel and an adjusting tank which are sequentially communicated: the separation process of the invention cancels an aeration device, the whole wastewater treatment operation cost is lower, the compounding agent formula is advanced, the floating effect of solid suspended particles is good, the solid-liquid separation effect is excellent, the whole device design is simple and reasonable, the application and popularization are facilitated, and the market prospect is wide.

Description

Aeration-free wastewater air-flotation complexing agent, preparation method and application method and device
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a wastewater air-flotation complexing agent without aeration, and a preparation method and an application method and a device thereof.
Background
In the wastewater treatment process, large particles in suspended particles in wastewater are subjected to flocculation precipitation, small particles or substances with smaller mass are mostly subjected to aeration floating after a coagulant is added and then are separated by a scraper, the method is limited by the existing coagulant, continuous aeration is needed in the prior art, the operation cost of the whole treatment process is high, and most of the operation cost comes from the cost generated by an aerator, so that the development of an aeration-free biogas slurry air-flotation complexing agent and a preparation and application method and device are needed.
Disclosure of Invention
The invention aims to provide an aeration-free wastewater air-flotation complexing agent which is free from an aeration device, low in operation cost and convenient to popularize and apply, and a preparation method and an application method and device thereof, aiming at the defect of poor coagulation treatment effect of wastewater.
The invention aims to provide a waste water air-flotation complexing agent without aeration, which comprises 20-50% of a coagulant by mass, wherein the coagulant comprises iron salt, magnesium salt and polyaluminium chloride; 3-5% of cross-linking agent.
The invention is further provided that the cross-linking agent is a water-soluble epoxy cross-linking agent or a cross-linking agent EH or a positively charged water-soluble epoxy cross-linking agent EPTA.
The invention is further configured that the iron salt is ferric sulfate, ferric chloride or ferrous sulfate, and the magnesium salt is magnesium sulfate or magnesium chloride.
The invention is further provided that the coagulant also comprises Mn ions and perchlorate radicals.
The second purpose of the invention is to provide a preparation method of the aeration-free wastewater air-flotation complexing agent, which comprises the pretreatment of a coagulant, wherein the pretreatment comprises the step of adding the coagulant containing ferric salt, magnesium salt and polyaluminium chloride, MnCl2And potassium perchlorate are dissolved in water, heated and stirred, and finally dried at 500 ℃ to form powder.
The third purpose of the invention is to provide an application method of the aeration-free wastewater air-flotation complexing agent, which comprises the following steps in sequence:
firstly, respectively dissolving a coagulant and a cross-linking agent in water for later use;
secondly, adding a coagulant into the wastewater to enable the coagulant and suspended particles in the wastewater to generate oxidation and coagulation reactions, wherein the injection amount of the coagulant is 0.25 percent of the amount of the wastewater;
thirdly, adding a cross-linking agent into the wastewater, wherein the injection amount of the cross-linking agent is 0.1 percent of the amount of the wastewater, so that loose floccules are formed in the wastewater;
and fourthly, after the reaction, the solid floccule can float upwards without aeration, and then the floating solid floccule is subjected to solid-liquid separation.
The fourth purpose of the invention is to provide an applying device of the aeration-free wastewater air-flotation complexing agent, which comprises a water pump, a first mixer, a buffer, a second mixer, a separating barrel and an adjusting tank which are communicated in sequence:
a water pump connected to a source of wastewater;
the first mixer is communicated with a coagulant dosing machine through a pipeline;
the second mixer is connected with the cross-linking agent dosing machine through a pipeline;
the separation barrel is provided with an automatic scraper for scraping floating solid floccules;
the controller is respectively connected with and controls the water pump, the coagulant dosing machine, the cross-linking agent dosing machine, the automatic scraper, the first mixer and the second mixer;
the first mixer and the second mixer are identical in structure and comprise a pipe body and a double-extension-head motor pump, and a first mixing blade and a second mixing blade are arranged in the pipe body in a double-helix mode.
The invention is further provided that a first injection pipe and a second injection pipe are arranged between the mixing blades in a double helix manner;
the double-extension-head motor pump comprises a pump body and a double-extension-head motor, wherein rotating shafts extending out of two ends of the double-extension-head motor are hollow shafts, and pump blades are arranged on the outer sides of the two ends of the double-extension-head motor;
an inner cavity is formed inside the rotating shaft, one end of the inner cavity is communicated with the water outlet pipe of the water pump, and the other end of the inner cavity is communicated with the first injection pipe;
an outer cavity is formed between the rotating shaft and the pump body, the outer cavity is communicated with the coagulant dosing machine or the cross-linking agent dosing machine through the pipeline, and the outer cavity is further communicated with the second injection pipe through a communicating pipe.
The invention is further arranged that a bearing and a rotary sealing element are arranged between the rotating shaft and the pump body;
a rotary sealing joint is arranged between the rotating shaft and the first injection pipe;
the outer side wall of the body of the double-extension-head motor is fixedly connected with the pump body through a positioning pipe, and a power line and a control line which are connected with the controller are arranged in the positioning pipe.
The invention is further set up in that the wastewater is anaerobic fermented: including biogas slurry or brewery wastewater or domestic sewage.
The invention has the beneficial effects that:
1. an aeration device is omitted in the separation process, and the whole wastewater treatment operation cost is low.
2. The complexing agent has advanced formula, good floating effect of solid suspended particles and excellent solid-liquid separation effect.
3. The whole device is simple and reasonable in design, beneficial to application and popularization and wide in market prospect.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a perspective partial sectional view of a double-extension-head motor of the present invention.
Fig. 4 is a schematic perspective view of the inside of the tube body according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited thereto.
Example 1
An aeration-free wastewater air-flotation complexing agent comprises 20-50% of a coagulant by mass, wherein the complexing agent comprises iron salt, magnesium salt and polyaluminium chloride; 3-5% of cross-linking agent.
The cross-linking agent is a water-soluble epoxy cross-linking agent or a cross-linking agent EH or a positively charged water-soluble epoxy cross-linking agent EPTA.
The iron salt is ferric sulfate or ferric chloride or ferrous sulfate, and the magnesium salt is magnesium sulfate or magnesium chloride.
The coagulant also comprises Mn ions and perchlorate radicals.
Example 2
With reference to example 1, a method for preparing an aeration-free wastewater air-flotation complexing agent comprises pretreating a coagulant comprising mixing a coagulant containing iron salt, magnesium salt and polyaluminium chloride, MnCl2And potassium perchlorate are dissolved in water, heated and stirred, and finally dried at 500 ℃ to form powder.
Example 3
Combining the embodiment 1 and the embodiment 2, the application method of the aeration-free wastewater air-floatation complexing agent sequentially comprises the following steps:
firstly, respectively dissolving a coagulant and a cross-linking agent in water for later use;
secondly, adding a coagulant into the wastewater to enable the coagulant and suspended particles in the wastewater to generate oxidation and coagulation reactions, wherein the injection amount of the coagulant is 0.25 percent of the amount of the wastewater;
thirdly, adding a cross-linking agent into the wastewater, wherein the injection amount of the cross-linking agent is 0.1 percent of the amount of the wastewater, so that loose floccules are formed in the wastewater;
and fourthly, after the reaction, the solid floccule can float upwards without aeration, and then the floating solid floccule is subjected to solid-liquid separation.
Example 4
With reference to embodiments 1-3, an application device of aeration-free wastewater air-flotation complexing agent comprises a water pump, a first mixer, a buffer, a second mixer, a separation barrel and an adjusting tank which are sequentially communicated: a water pump connected to a source of wastewater; the first mixer is communicated with a coagulant dosing machine through a pipeline; the second mixer is connected with the cross-linking agent dosing machine through a pipeline; the separation barrel is provided with an automatic scraper for scraping floating solid floccules; the controller is respectively connected with and controls the water pump, the coagulant dosing machine, the cross-linking agent dosing machine, the automatic scraper, the first mixer and the second mixer;
first blender and second blender structure are the same, all include body 1 and two first motor pumps that stretch, are the double helix in the body 1 and are provided with first mixing blade 2 and second mixing blade 3.
A first injection pipe 4 and a second injection pipe 5 are arranged between the mixing blades in a double-helix manner;
the double-extension-head motor pump comprises a pump body 6 and a double-extension-head motor 7, wherein rotating shafts 8 extending out of two ends of the double-extension-head motor 7 are hollow shafts, and pump blades 9 are arranged on the outer sides of two ends of the hollow shafts;
an inner cavity 81 is formed inside the rotating shaft 8, one end of the inner cavity 81 is communicated with a water outlet pipe 82 of the water pump, and the other end of the inner cavity 81 is communicated with the first injection pipe 4;
an outer cavity 61 is formed between the rotating shaft 8 and the pump body 6, the outer cavity 61 is communicated with a coagulant dosing machine 63 or a cross-linking agent dosing machine through a pipeline 62, and the outer cavity 61 is also communicated with the second injection pipe 5 through a communicating pipe 64.
A bearing and a rotary sealing element are arranged between the rotating shaft 8 and the pump body 6;
a rotary sealing joint 83 is arranged between the rotating shaft 8 and the first injection pipe 4;
the outer side wall of the body of the double-extension-head motor 7 is fixedly connected with the pump body 6 through a positioning pipe 71, and a power line and a control line which are connected with a controller are arranged in the positioning pipe 71.
The wastewater is obtained by anaerobic fermentation: including biogas slurry or brewery wastewater or domestic sewage.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the examples, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (4)

1. The aeration-free wastewater treatment method is characterized in that the complexing agent comprises the following components in percentage by mass,
20-50% of a coagulant which comprises iron salt, magnesium salt and polyaluminium chloride;
3-5% of a cross-linking agent; the cross-linking agent is a water-soluble epoxy cross-linking agent or a cross-linking agent EH or a positively charged water-soluble epoxy cross-linking agent EPTA; the iron salt is ferric sulfate, ferric chloride or ferrous sulfate, and the magnesium salt is magnesium sulfate or magnesium chloride; the coagulant also comprises Mn ions and perchlorate radicals; the complexing agent is applied to the wastewater after anaerobic fermentation;
the preparation method of the complexing agent comprises the pretreatment of a coagulant, wherein the pretreatment comprises the steps of dissolving the coagulant containing ferric salt, magnesium salt and polyaluminium chloride, MnCl2 and potassium perchlorate in water, heating and stirring, and finally drying at 500 ℃ to form powder;
the steps of the wastewater treatment method are as follows in sequence:
firstly, respectively dissolving a coagulant and a cross-linking agent in water for later use;
secondly, adding a coagulant into the wastewater to enable the coagulant and suspended particles in the wastewater to generate oxidation and coagulation reactions, wherein the injection amount of the coagulant is 0.25 percent of the amount of the wastewater;
thirdly, adding a cross-linking agent into the wastewater, wherein the injection amount of the cross-linking agent is 0.1 percent of the amount of the wastewater, so that loose floccules are formed in the wastewater;
fourthly, after the reaction, the solid floccule can float upwards without aeration, and then the floating solid floccule is subjected to solid-liquid separation;
the wastewater comprises biogas slurry or winery wastewater or domestic sewage;
the wastewater treatment method uses the following devices: including water pump, first blender, buffer, second blender, separation bucket, the adjustment tank that communicates in proper order:
a water pump connected to a source of wastewater; the controller is respectively connected with and controls the water pump, the coagulant dosing machine, the cross-linking agent dosing machine, the automatic scraper, the first mixer and the second mixer; first blender and second blender structure are the same, all include body (1) and two motor pumps that stretch, be double helix in body (1) and be provided with first hybrid blade (2) and second hybrid blade (3).
2. Need not aeration type effluent treatment plant, its characterized in that, the device is including water pump, first blender, buffer, second blender, separation bucket, the adjustment tank that communicates in proper order:
a water pump connected to a source of wastewater;
the first mixer is communicated with a coagulant dosing machine through a pipeline;
the second mixer is connected with the cross-linking agent dosing machine through a pipeline;
the separation barrel is provided with an automatic scraper for scraping floating solid floccules;
the controller is respectively connected with and controls the water pump, the coagulant dosing machine, the cross-linking agent dosing machine, the automatic scraper, the first mixer and the second mixer;
first blender and second blender structure are the same, all include body (1) and two motor pumps that stretch, be double helix in body (1) and be provided with first hybrid blade (2) and second hybrid blade (3).
3. A non-aeration type wastewater treatment apparatus according to claim 2, wherein a first injection pipe (4) and a second injection pipe (5) are arranged in a double spiral between the mixing blades;
the double-extension-head motor pump comprises a pump body (6) and a double-extension-head motor (7), wherein rotating shafts (8) extending out of two ends of the double-extension-head motor (7) are hollow shafts, and pump blades (9) are arranged on the outer sides of two ends of the double-extension-head motor;
an inner cavity (81) is formed inside the rotating shaft (8), one end of the inner cavity (81) is communicated with the water outlet pipe (82) of the water pump, and the other end of the inner cavity is communicated with the first injection pipe (4);
an outer cavity (61) is formed between the rotating shaft (8) and the pump body (6), the outer cavity (61) is communicated with a coagulant dosing machine (63) or a cross-linking agent dosing machine through a pipeline (62), and the outer cavity (61) is further communicated with the second injection pipe (5) through a communicating pipe (64).
4. A non-aeration type wastewater treatment apparatus according to claim 3, wherein bearings and rotary seals are provided between the rotary shaft (8) and the pump body (6);
a rotary sealing joint (83) is arranged between the rotating shaft (8) and the first injection pipe (4);
the outer side wall of the body of the double-extension-head motor (7) is fixedly connected with the pump body (6) through a positioning pipe (71), and a power line and a control line which are connected with the controller are arranged in the positioning pipe (71).
CN201610907261.0A 2016-10-19 2016-10-19 Aeration-free wastewater air-flotation complexing agent, preparation method and application method and device Active CN106396170B (en)

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CN101306847B (en) * 2008-07-02 2011-03-02 泉州师范学院 Emergency repairing method for natural water body by self-air-float method
CN101786712B (en) * 2010-03-05 2012-07-04 泉州师范学院 Anti-wave emergency restoration process for polluted natural water body
CN101786745B (en) * 2010-03-05 2012-01-11 泉州师范学院 Emergent large and medium-sized natural water body algae pollution remediation technique capable of resisting light stormy waves
CN102464386A (en) * 2011-10-20 2012-05-23 常州亚环环保科技有限公司 Complexing agent for removing vanadium in wastewater and application method thereof
CN103086456A (en) * 2013-03-01 2013-05-08 哈尔滨工业大学 Method for strengthening separation effect of air floatation process by using micro-bubble modification technology

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