CN110655225A - Carbon black water treatment method and carbon black water treatment system - Google Patents

Carbon black water treatment method and carbon black water treatment system Download PDF

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Publication number
CN110655225A
CN110655225A CN201810691928.7A CN201810691928A CN110655225A CN 110655225 A CN110655225 A CN 110655225A CN 201810691928 A CN201810691928 A CN 201810691928A CN 110655225 A CN110655225 A CN 110655225A
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carbon black
black water
treatment
treatment liquid
water treatment
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CN201810691928.7A
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Chinese (zh)
Inventor
刘巍
杨晓明
蒲文晶
王宏伟
苗磊
饶辉凯
庄立波
耿长君
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China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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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
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32

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

Abstract

The invention provides a carbon black water treatment method and a carbon black water treatment system. The carbon black water treatment method comprises the following steps: s1, carrying out coagulation treatment on the carbon black water to obtain a first treatment liquid; s2, carrying out air stripping treatment on the first treatment liquid to obtain a second treatment liquid; and S3, performing activated carbon adsorption treatment on the second treatment liquid to obtain treated carbon black water. By adopting the process, higher suspended matter removal rate and NH can be realized3The removal rate of N is reduced, and COD in the carbon black water is greatly reduced, so that the treated carbon black water can be recycled. Moreover, the process has strong adaptability, the treatment effect is not influenced by the change of water quantity and water quality, and the operation is simple and easy to control; the main parameters to be controlled in the whole process are only temperature, flow and aeration quantity, and the process can be continuously operated for a long time after being set once if no special condition exists, so that the manual operation is greatly reduced. In addition, the process also has the advantages of land occupation saving, low investment and operation cost and the like.

Description

Carbon black water treatment method and carbon black water treatment system
Technical Field
The invention relates to the technical field of water treatment, in particular to a carbon black water treatment method and a carbon black water treatment system.
Background
At present, carbon black water generated by a synthetic ammonia device is generally recycled by filter pressing and then discharged into the environment, and because the carbon black water is not utilized, not only is certain waste caused, but also the environmental risk is increased. Enterprises pay more and more attention to economic benefits, environmental benefits and social benefits generated by recycling of carbon black water, and in the face of higher and higher environmental protection requirements, production drainage is reduced, external drainage is recycled, so that cost is saved, environmental pollution is reduced, and environmental protection pressure is relieved. The full utilization of the carbon black water is a link which needs to be paid attention to energy conservation, water conservation and emission reduction of enterprises.
In the prior art, a carbon black water treatment method is to utilize a novel miniature solid-liquid separation cyclone to carry out preliminary separation of carbon black and water to assist a stripping tower in deamination, and NH treated by the method3The N is reduced from 4000mg/L to 400mg/L, and the Suspended Substance (SS) reaches 20-30 mg/L. The other method is to mix the carbon black water with flocculant for reaction, and then precipitate and filter the mixture, wherein the flocculant is liquid polymeric ferric sulfate aqueous solution. After the treatment by the method, COD is reduced to 50-80 mg/L, and SS reaches 10-20 mg/L.
Disclosure of Invention
The invention mainly aims to provide a carbon black water treatment method and a carbon black water treatment system, so that the carbon black water after treatment can be recycled.
In order to achieve the above object, according to one aspect of the present invention, there is provided a carbon black water treatment method including the steps of: s1, carrying out coagulation treatment on the carbon black water to obtain a first treatment liquid; s2, carrying out air stripping treatment on the first treatment liquid to obtain a second treatment liquid; and S3, performing activated carbon adsorption treatment on the second treatment liquid to obtain treated carbon black water.
Further, in step S1, the carbon black water is coagulated with polyaluminum chloride and polyacrylamide.
Further, the ratio of the concentration of suspended matter in the carbon black water, the amount of polyaluminum chloride added and the amount of polyacrylamide added is 4:7:1 to 3:6: 1.
Furthermore, the concentration of suspended matters in the carbon black water is 8-12 mg/L, the adding amount of the polyaluminium chloride is 16-24 mg/L, and the adding amount of the polyacrylamide is 3-4 mg/L.
Further, step S2 includes the following processes: s21, adjusting the pH value of the first treatment liquid to 11-14; and S22, carrying out aeration treatment on the first treatment liquid.
Further, the pH value of the first treatment liquid is adjusted to 11-14, and the gas-liquid ratio of aeration treatment is 1.
Further, in step S3, the second treatment liquid is introduced into an activated carbon adsorption device, and an activated carbon filter material is disposed in the activated carbon adsorption device.
Further, the filtering speed of the active carbon filter material on the second treatment fluid is 8-12 m/h.
According to another aspect of the present invention, there is provided a carbon black water treatment system comprising: the coagulation device is used for carrying out coagulation treatment on the carbon black water to obtain a first treatment liquid; the air stripping device is communicated with the coagulation device and is used for carrying out air stripping treatment on the first treatment liquid to obtain a second treatment liquid; and the activated carbon adsorption device is communicated with the stripping device and is used for carrying out activated carbon adsorption treatment on the second treatment liquid to obtain treated carbon black water.
Furthermore, the blow-off device is a blow-off tank, and an aeration column is arranged at the bottom of the blow-off tank.
Applying the technique of the inventionThe proposal provides a carbon black water treatment method, which comprises the steps of firstly coagulating carbon black water to effectively remove suspended matters in the carbon black water, and then blowing off the carbon black water to effectively remove NH in the carbon black water3N, finally, performing activated carbon adsorption treatment on the carbon black water, thereby effectively reducing COD (chemical oxygen demand) in the carbon black water, and further realizing higher suspended matter removal rate and NH (NH) by the process3The removal rate of N is reduced, and COD in the carbon black water is greatly reduced, so that the treated carbon black water can be recycled. Moreover, the process has strong adaptability, the treatment effect is not influenced by the change of water quantity and water quality, and the operation is simple and easy to control; the main parameters to be controlled in the whole process are only temperature, flow and aeration quantity, and the process can be continuously operated for a long time after being set once if no special condition exists, so that manual operation is greatly reduced; in addition, the process also has the advantages of land occupation saving, low investment and operation cost and the like.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic flow diagram of a carbon black water treatment method provided by the present invention;
fig. 2 is a schematic view showing a connection structure of the carbon black water treatment system provided by the present invention.
Wherein the figures include the following reference numerals:
10. a coagulation device; 20. a blow-off device; 30. an activated carbon adsorption device.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As described in the background art, the carbon black water produced in the prior art ammonia synthesis plants is usually recovered by pressure filtration and then discharged into the environment, which not only results in a certain waste but also increases the environmental risk since the carbon black water is not utilized. The inventors of the present application studied in view of the above problems and proposed a carbon black water treatment method, as shown in fig. 1, comprising the steps of: s1, carrying out coagulation treatment on the carbon black water to obtain a first treatment liquid; s2, carrying out air stripping treatment on the first treatment liquid to obtain a second treatment liquid; and S3, performing activated carbon adsorption treatment on the second treatment liquid to obtain treated carbon black water.
In the carbon black water treatment method, the carbon black water is firstly coagulated so as to effectively remove suspended matters in the carbon black water, and then the carbon black water is subjected to air stripping so as to effectively remove NH in the carbon black water3N, and finally, performing activated carbon adsorption treatment on the carbon black water, thereby effectively reducing COD (chemical oxygen demand) in the carbon black water, and further being capable of reducing COD in the carbon black water by the processRealize higher suspended matter removal rate and NH3The removal rate of N is reduced, and COD in the carbon black water is greatly reduced, so that the treated carbon black water can be recycled.
Moreover, the process has strong adaptability, the treatment effect is not influenced by the change of water quantity and water quality, and the operation is simple and easy to control; the main parameters to be controlled in the whole process are only temperature, flow and aeration quantity, and the process can be continuously operated for a long time after being set once if no special condition exists, so that manual operation is greatly reduced; in addition, the process also has the advantages of land occupation saving, low investment and operation cost and the like.
An exemplary embodiment of a carbon black water treatment method provided according to the present invention will be described in more detail below. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art.
First, step S1 is executed: and carrying out coagulation treatment on the carbon black water to obtain a first treatment liquid. Specifically, the coagulation treatment described above may be performed using the coagulation apparatus 10, as shown in fig. 2. In order to more effectively remove suspended matters (SS) in the carbon black water, the carbon black water is preferably subjected to coagulation treatment by using polyaluminum chloride and polyacrylamide; more preferably, the ratio of the concentration of suspended matter in the carbon black water, the amount of polyaluminum chloride added and the amount of polyacrylamide added is 4:7:1 to 3:6: 1.
In a preferred embodiment, the concentration of suspended matter in the carbon black water is 8 to 12mg/L, the amount of the polyaluminum chloride added is 16 to 24mg/L, and the amount of the polyacrylamide added is 3 to 4 mg/L. Experiments prove that the suspended matter removal rate can reach 85-100% by adopting the preferred embodiment.
After step S1, step S2 is performed: and carrying out air stripping treatment on the coagulated first treatment liquid to obtain a second treatment liquid. Specifically, the above-mentioned blow-off treatment may be carried out by using a blow-off device 20, such asAs shown in fig. 2. To more effectively remove NH in the carbon black water3N, preferably, the above step S2 includes the following processes: s21, adjusting the pH value of the first treatment liquid to 11-14; and S22, carrying out aeration treatment on the first treatment liquid.
In a preferred embodiment, the pH value of the first treatment liquid is adjusted to 11-14, then the first treatment liquid enters a stripping device, wastewater is aerated in the stripping device, and the gas-liquid ratio of aeration treatment is adjusted to (2000-2500): 1. Experiments have shown that NH can be added to carbon black water using the preferred embodiment described above3the-N removal rate reaches more than 95 percent.
After step S2, step S3 is performed: and carrying out activated carbon adsorption treatment on the second treatment solution subjected to the stripping treatment to obtain treated carbon black water. Specifically, the second treatment liquid may be introduced into an activated carbon adsorption device 30, and an activated carbon filter material is disposed in the activated carbon adsorption device (30), as shown in fig. 2.
In a preferred embodiment, the blown-off second treatment liquid enters an activated carbon adsorption device, and various particles in water are removed completely through the interception effect of a filter material, wherein the filtering speed is 8-12 m/h. Experiments prove that the COD in the carbon black water can be reduced to below 50mg/L by adopting the preferred embodiment.
According to another aspect of the present invention, there is also provided a carbon black water treatment system, as shown in fig. 2, the carbon black water treatment system includes a coagulation device 10, a blow-off device 20 and an activated carbon adsorption device 30, the coagulation device 10 is configured to perform coagulation treatment on carbon black water to obtain a first treatment liquid; the stripping device 20 is communicated with the coagulation device 10 and is used for carrying out stripping treatment on the first treatment liquid to obtain a second treatment liquid; the activated carbon adsorption device 30 is communicated with the stripping device 20 and is used for performing activated carbon adsorption treatment on the second treatment liquid to obtain treated carbon black water.
In the above carbon black water treatment system of the present invention, the coagulation device 10 is included to effectively remove suspended substances in the carbon black water, and the blow-off device 20 is included to effectively remove NH in the carbon black water3N, by including an activated carbon adsorption device 30, therebyEffectively reduce the COD in the carbon black water, and then can realize higher suspended matter removal rate and NH through the carbon black water treatment system3The removal rate of N is reduced, and COD in the carbon black water is greatly reduced, so that the treated carbon black water can be recycled.
Moreover, the carbon black water treatment system has strong adaptability, the treatment effect is not influenced by the change of water quantity and water quality, and the operation is simple and easy to control; the main parameters to be controlled of the whole system are only temperature, flow and aeration quantity, and the system can continuously run for a long time after being set once if no special condition exists, so that manual operation is greatly reduced; in addition, the system also has the advantages of land occupation saving, low investment and operation cost and the like.
In the above carbon black water treatment system of the present invention, the stripping apparatus 20 may be a stripping tank, and an aeration column is disposed at the bottom of the stripping tank.
The carbon black water treatment method provided by the present invention will be further described with reference to examples and comparative examples.
Example 1
The carbon black water treatment method provided by the embodiment comprises the following steps:
adding carbon black water generated by an ammonia synthesis device into a coagulation tank, stirring, adding 20mg/L of polyaluminum chloride and 2mg/L of polyacrylamide while stirring, continuing stirring for 15min, standing for precipitation for 30min, and taking supernatant for analyzing SS. Adjusting the pH value of the supernatant (namely the first treatment solution) after coagulation treatment to 10.8, then entering an air stripping device, carrying out aeration treatment on the wastewater in the air stripping device, wherein the gas-liquid ratio is 1900:1, and sampling and analyzing ammonia nitrogen after treatment. And (3) feeding the blown-off wastewater (namely the second treatment solution) into an activated carbon adsorption device, and taking out water to analyze COD (chemical oxygen demand) at a filtering speed of 7 m/h.
Example 2
The carbon black water treatment method provided by the embodiment is different from the embodiment 1 in that:
the concentration of suspended matters in the carbon black water is 15mg/L, the dosage of the polyaluminium chloride is 30mg/L, and the dosage of the polyacrylamide is 5 mg/L.
Example 3
The carbon black water treatment method provided by the embodiment is different from the embodiment 1 in that:
the concentration of suspended matters in the carbon black water is 12mg/L, the dosage of the polyaluminium chloride is 21mg/L, and the dosage of the polyacrylamide is 3 mg/L.
Example 4
The carbon black water treatment method provided by the embodiment is different from the embodiment 1 in that:
the concentration of suspended matters in the carbon black water is 8mg/L, the dosage of the polyaluminium chloride is 16mg/L, and the dosage of the polyacrylamide is 3 mg/L.
Example 5
The carbon black water treatment method provided by the embodiment is different from the embodiment 1 in that:
the concentration of suspended matters in the carbon black water is 12mg/L, the dosage of the polyaluminium chloride is 24mg/L, and the dosage of the polyacrylamide is 4 mg/L.
Example 6
The carbon black water treatment method provided by the embodiment is different from the carbon black water treatment method provided by the embodiment 5 in that:
the pH value of the first treating solution is adjusted to 11, and the gas-liquid ratio of aeration treatment is 2000: 1.
Example 7
The carbon black water treatment method provided by the embodiment is different from the carbon black water treatment method provided by the embodiment 5 in that:
the pH value of the first treatment liquid is adjusted to 14, and the gas-liquid ratio of aeration treatment is 2500: 1.
Example 8
The carbon black water treatment method provided by the embodiment is different from the carbon black water treatment method provided by the embodiment 7 in that:
the filtering speed of the activated carbon filter material on the second treatment fluid is 8 m/h.
Example 9
The carbon black water treatment method provided by the embodiment is different from the carbon black water treatment method provided by the embodiment 7 in that:
the filtering speed of the activated carbon filter material on the second treatment fluid is 12 m/h.
Example 10
The carbon black water treatment method provided by the embodiment comprises the following steps:
adding carbon black water generated by an ammonia synthesis device into a coagulation tank, stirring, adding 10mg/L of polyaluminum chloride (available on the market) and 20mg/L of polyacrylamide (available on the market) while stirring, continuously stirring for 15min, standing for precipitation for 30min, and taking supernatant for analyzing SS. Adjusting the pH value of the supernatant (namely the first treatment solution) after coagulation treatment to 12, then entering a stripping device, carrying out aeration treatment on the wastewater in the stripping device with the gas-liquid ratio of 2200:1, and sampling and analyzing ammonia nitrogen after treatment. The blown-off wastewater (namely the second treatment solution) enters an activated carbon adsorption device, the filtration speed is 10m/h, and water is taken out for COD analysis.
The carbon black water treated in examples 1 to 10 was tested for various indexes, and the test results are shown in the following table.
As can be seen from the above test results, the carbon black water treatment methods of examples 1 to 10 can achieve high removal rate of suspended substances and NH from wastewater3The N removal rate and the COD in the carbon black water are greatly reduced.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. the carbon black water treatment method can realize higher suspended matter removal rate and NH3The removal rate of N is reduced, and COD in the carbon black water is greatly reduced, so that the treated carbon black water can be recycled;
2. the process has strong adaptability, the treatment effect is not influenced by the change of water quantity and water quality, and the operation is simple and easy to control;
3. the main parameters to be controlled in the whole process are only temperature, flow and aeration quantity, and the process can be continuously operated for a long time after being set once if no special condition exists, so that manual operation is greatly reduced;
4. the process also has the advantages of land occupation saving, low investment and operation cost and the like.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A carbon black water treatment method is characterized by comprising the following steps:
s1, carrying out coagulation treatment on the carbon black water to obtain a first treatment liquid;
s2, performing air stripping treatment on the first treatment liquid to obtain a second treatment liquid;
and S3, performing activated carbon adsorption treatment on the second treatment liquid to obtain the treated carbon black water.
2. The carbon black water treatment method as claimed in claim 1, wherein in the step S1, the carbon black water is coagulated by polyaluminum chloride and polyacrylamide.
3. The method for treating carbon black water according to claim 2, wherein the ratio of the concentration of suspended matter in the carbon black water, the amount of the polyaluminum chloride added and the amount of the polyacrylamide added is 3 to 4:6 to 7: 1.
4. The carbon black water treatment method according to claim 3, wherein the concentration of suspended matters in the carbon black water is 8 to 12mg/L, the amount of the polyaluminum chloride added is 16 to 24mg/L, and the amount of the polyacrylamide added is 3 to 4 mg/L.
5. The carbon black water treatment method according to any one of claims 1 to 4, wherein the step S2 includes the process of:
s21, adjusting the pH value of the first treatment liquid to 11-14;
and S22, carrying out aeration treatment on the first treatment liquid after the pH is adjusted.
6. The carbon black water treatment method according to claim 5, wherein the gas-liquid ratio of the aeration treatment is (2000-2500): 1.
7. The carbon black water treatment method as claimed in claim 1, wherein in step S3, the second treatment liquid is introduced into an activated carbon adsorption device, and an activated carbon filter material is provided in the activated carbon adsorption device.
8. The carbon black water treatment method according to claim 7, wherein the filtration rate of the activated carbon filter material to the second treatment liquid is 8-12 m/h.
9. A carbon black water treatment system, comprising:
the coagulation device (10) is used for carrying out coagulation treatment on the carbon black water to obtain a first treatment liquid;
the stripping device (20) is communicated with the coagulation device (10) and is used for carrying out stripping treatment on the first treatment liquid to obtain a second treatment liquid;
and the activated carbon adsorption device (30) is communicated with the stripping device (20) and is used for carrying out activated carbon adsorption treatment on the second treatment liquid to obtain the treated carbon black water.
10. The carbon black water treatment system according to claim 9, wherein the stripping device (20) is a stripping tank, and an aeration column is arranged at the bottom of the stripping tank.
CN201810691928.7A 2018-06-28 2018-06-28 Carbon black water treatment method and carbon black water treatment system Pending CN110655225A (en)

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CN102951711A (en) * 2011-08-25 2013-03-06 中国石油化工集团公司 Method for treating carbon black water obtained by natural gas partial oxidation preparation of acetylene
CN103496808A (en) * 2013-10-24 2014-01-08 贵州绿色环保设备工程有限责任公司 Carbon black waste water treatment method
CN104176884A (en) * 2014-09-01 2014-12-03 长春黄金研究院 Cyanide-containing wastewater comprehensive treatment method

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