CN112209490A - Improving O content in modified domestic garbage incinerator slag3Method for treating urban black smelly water effect - Google Patents

Improving O content in modified domestic garbage incinerator slag3Method for treating urban black smelly water effect Download PDF

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Publication number
CN112209490A
CN112209490A CN202010727868.7A CN202010727868A CN112209490A CN 112209490 A CN112209490 A CN 112209490A CN 202010727868 A CN202010727868 A CN 202010727868A CN 112209490 A CN112209490 A CN 112209490A
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slag
black
putting
ball
treating
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CN112209490B (en
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张云飞
李衍亮
吴琪
徐剑晖
王汉洪
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Guangdong Blue Dragon Environmental Technology Co ltd
Dongguan University of Technology
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Guangdong Blue Dragon Environmental Technology Co ltd
Dongguan University of Technology
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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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the alkali- or alkaline earth metals or beryllium
    • 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
    • C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation

Abstract

The invention relates to a method for improving O content in modified domestic garbage incinerator slag3A method of treating the effects of urban black smelling water, the method comprising: s1, grinding the ball, slag and K2SO4Putting the mixture into a ball milling tank according to the weight ratio of 15-20: 1: 0.08-0.15, covering a cover, and milling for 10-30 min at the rotation speed of 550 rpm; s2, putting the ball-milled slag into H with the concentration of 0.03-0.1 mmmol/L2O2Stirring the solution by a stirrer for 12 to 36 hours; s3, filtering the slag processed in the step (S2), removing the solution, and drying for 6-8 hours at the temperature of-20 to-10 ℃ by using a freezing drying agent; s4, putting the slag processed in the step (S3) into a reactor, wherein the stacking density of the slag is 0.15-0.45 kg/L, pumping black and odorous water into the reactor, adjusting the pH value to 5.0-6.0, and introducing ozone for a certain time to remove pollutants in the black and odorous water. The method provided by the invention is easy to operateThe method does not need links such as high-temperature sintering and the like, and has low cost and good catalytic effect in treating black and odorous water.

Description

Improving O content in modified domestic garbage incinerator slag3Method for treating urban black smelly water effect
Technical Field
The invention belongs to the field of solid waste recycling, and relates to a method for improving O content in modified household garbage incinerator slag3A method for treating urban black smelly water.
Background
In many cities in China, river pollution is ubiquitous and increasingly prominent, urban sewage is directly discharged into rivers, the pollution is serious when flowing through urban river reach, and seasonal or perennial black and odorous water bodies appear. Black and odorous water becomes a water environment problem to be solved urgently in the current urban river pollution problem in China. In addition, the proportion of incineration disposal of municipal solid waste in China has increased year by year in 2003, and in 2020, the proportion of incineration power generation in municipal solid waste disposal accounts for more than 50%.
However, the waste incineration residue inevitably produces a byproduct, namely, slag, and the waste incineration residue is greatly different from general slag (mainly slag produced in a metallurgical process) except that the waste incineration residue contains SiO2-Al2O3-CaO-Fe2O3Besides, the material also comprises unburned organic matters and slag ash. In addition, the ozone catalytic oxidation treatment of wastewater has good effect and high reaction speed, and has wide prospect in solving black and odorous water. Although the waste incineration slag also contains a plurality of components for catalyzing ozone, the structure of the slag is compact after the waste incineration slag is incinerated at high temperature, and the surface of the slag is greatly coated with SiO4]4-Wrapping, low catalytic activity and need to be modified. Therefore, it is one of the environmental technologies to be urgently developed to find a low-cost and green method for modifying waste incineration slag.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for treating urban black odorous water by catalyzing ozone with modified domestic garbage incinerator slag (hereinafter referred to as slag).
In order to achieve the purpose, the invention adopts the following technical scheme:
improved O content in modified household garbage incinerator slag3The method for treating the effect of urban black smelly water comprises the following steps:
s1, grinding the ball, slag and K2SO4Putting the mixture into a ball milling tank according to the weight ratio of 15-20: 1: 0.08-0.15, covering the ball milling tank with a cover, and milling for 10-30 min at the rotation speed of 550 rpm.
S2, putting the ball-milled slag into H with the concentration of 0.03-0.1 mmmol/L2O2Stirring the aqueous solution by a stirrer for 12 to 36 hours. Wherein (S1) added K2SO4Easily dissolved in water and can react with Ca in the slag2+And Al2O3A gelation reaction (reaction 1) occurs to form a fibrous surface layer on the slag surface and to displace a part of [ SiO ] in the slag4]4-The polymerization degree of the Si-O-Al network polymer in the slag is reduced. In addition, the metal ions in the slag catalyze H2O2The decomposition produces bubbles, and the vitreous body of the slag is further dissociated under the impact of a large number of bubbles.
Al2O3+Ca2++OH-+SO4 2-→CaO·Al2O3·CaSO4·32H2O (reaction 1)
S3, filtering the slag processed in the step (S2), removing the solution, and drying for 6-8 h at the temperature of-20 to-10 ℃ by using a freeze-drying agent.
S4, putting the slag processed in the step (S3) into a reactor, wherein the stacking density of the slag is 0.15-0.45 kg/L, pumping black and odorous water into the reactor, adjusting the pH value to 5.0-6.0, and introducing ozone for a certain time to remove pollutants in the black and odorous water.
The slag produced after refuse incineration has complex components, compact structure and stable chemical property, and the invention firstly uses a ball mill to crush the slag, and K2SO4Uniformly dispersed in slag, dissolved in water, H in solution2O2And SO4 2-Furnace capable of being communicated withCa of slag2+、Al2O3And silicate, which has a series of complex reactions to reduce the polymerization degree of Si-O-Al polymer, destroy network structure, and catalyze O3The activity of (2) is improved.
Compared with the prior art, the method has the beneficial effects that:
1. the method provided by the invention is easy to operate, links such as high-temperature sintering and the like are not needed, and only the ball mill, potassium sulfate and H are used in the whole process2O2And is green and pollution-free.
2. The high-efficiency catalyst for changing ozone in the waste household garbage incinerator slag avoids most of expensive chemical reagents used in ozone catalytic reaction, and has low cost and good catalytic effect for treating black and odorous water.
Drawings
FIG. 1 is a comparison graph of black smelly water treated by ozone catalyzed by the original slag according to the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples and drawings, which are not intended to limit the invention in any manner. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
The invention provides a modified domestic garbage incinerator slag for increasing O3The method for treating the effect of the urban black odorous water comprises the following steps:
s1, grinding the ball, slag and K2SO4Putting the mixture into a ball milling tank according to the weight ratio of 15-20: 1: 0.08-0.15, covering a cover, and milling at the speed of 550rpm for 10-30 min to crush the slag;
s2, putting the ball-milled slag into H with the concentration of 0.03-0.1 mmmol/L2O2Stirring the aqueous solution by a stirrer for 12 to 36 hours. Wherein (S1) added K2SO4Easily dissolved in water and can react with Ca in the slag2+And Al2O3A gelation reaction (reaction 1) occurs to form a fibrous surface layer on the slag surface and to displace a part of [ SiO ] in the slag4]4-The polymerization degree of the Si-O-Al network polymer in the slag is reduced. In addition, the metal ions in the slag catalyze H2O2Decomposing to generate bubbles, and further dissociating the vitreous body of the slag under the impact action of a large amount of bubbles;
Al2O3+Ca2++OH-+SO4 2-→CaO·Al2O3·CaSO4·32H2o (reaction 1)
S3, filtering the slag processed in the step (S2), removing the solution, and drying for 6-8 hours at the temperature of-20 to-10 ℃ by using a freeze-drying agent;
s4, putting the slag processed in the step (S3) into a reactor, wherein the stacking density of the slag is 0.15-0.45 kg/L, pumping black and odorous water into the reactor, adjusting the pH value to 5.0-6.0, and introducing ozone for a certain time to remove pollutants in the black and odorous water.
[ example 1 ]:
improved O content in modified household garbage incinerator slag3The method for treating the effect of urban black smelly water comprises the following steps:
s1, grinding the ball, slag and K2SO4Putting into a ball milling tank according to the weight ratio of 15: 1: 0.1, covering a cover, and milling at the rotation speed of 550rpm for 30min to crush the furnace slag.
S2, putting the ball-milled slag into H with the concentration of 0.1mmmol/L2O2The aqueous solution of (1) was stirred with a stirrer for 12 hours.
S3, filtering the slag treated in S2, removing the solution, and drying with a freeze-drying agent at-10 deg.C for 8 h.
S4, putting the slag processed by the step (S3) into a reactor, wherein the bulk density of the slag is 0.3 kg/L, pumping black smelly water into the reactor, adjusting the pH value to 6.0, and introducing ozone for reacting for 2 hours, wherein the removal effect of pollutants in the black smelly water is shown in the following table:
TABLE 1 Effect of modified domestic garbage incinerator slag on catalytic ozonation of black and odorous water
Figure BDA0002601479360000041
Comparative example 1
The difference from the example 1 is that after the slag is ball-milled for 30min and crushed, the original domestic garbage incinerator slag is directly used (S4) as a catalyst, the wastewater degradation condition is the same as that of the comparative example 1, and the comparison effect is shown in the following figure, so that the method provided by the invention can be greatly improved.
The slag produced after refuse incineration has complex components, compact structure and stable chemical property, and the invention firstly uses a ball mill to crush the slag, and K2SO4Uniformly dispersed in slag, dissolved in water, H in solution2O2And SO4 2-Ca which will react with slag2+、Al2O3And silicate, which has a series of complex reactions to reduce the polymerization degree of Si-O-Al polymer, destroy network structure, and catalyze O3The activity of (2) is improved.
Compared with the prior art, the method has the beneficial effects that:
1. the method provided by the invention is easy to operate, links such as high-temperature sintering and the like are not needed, and only the ball mill, potassium sulfate and H are used in the whole process2O2And is green and pollution-free.
2. The high-efficiency catalyst for changing ozone in the waste household garbage incinerator slag avoids most of expensive chemical reagents used in ozone catalytic reaction, and has low cost and good catalytic effect for treating black and odorous water.
The method provided by the invention is easy to operate, does not need links such as high-temperature sintering and the like, and has low cost and good catalytic effect in treating black and odorous water.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (1)

1. Improved O content in modified household garbage incinerator slag3The method for treating the urban black smelly water effect comprises the following steps:
s1, grinding the ball, slag and K2SO4Putting the mixture into a ball milling tank according to the weight ratio of 15-20: 1: 0.08-0.15, covering a cover, and milling at the speed of 550rpm for 10-30 min to crush the slag;
s2, putting the ball-milled slag into H with the concentration of 0.03-0.1 mmmol/L2O2Stirring the solution by a stirrer for 12 to 36 hours;
s3, filtering the slag processed in the step S2, removing the solution, and drying for 6-8 hours at the temperature of-20 to-10 ℃ by using a freezing drying agent;
s4, putting the slag processed in the step S3 into a reactor, wherein the stacking density of the slag is 0.15-0.45 kg/L, pumping black and odorous water into the reactor, adjusting the pH value to 5.0-6.0, and introducing ozone for a certain time.
CN202010727868.7A 2020-07-24 2020-07-24 Improving O content in modified domestic garbage incinerator slag3Method for treating urban black smelly water effect Active CN112209490B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070256979A1 (en) * 2004-06-15 2007-11-08 Condit Randy G Hydrogen peroxide based water treatment system and method
CN103787488A (en) * 2014-02-10 2014-05-14 同济大学 Method of treating wastewater by catalyzing ozone to oxidize by using pyrite cinder
CN103922787A (en) * 2014-03-18 2014-07-16 北京大学 Method for preparing porous material by using titanium-containing blast furnace slag, and titanium-containing porous material
CN103962149A (en) * 2013-09-06 2014-08-06 张振慧 Method for preparing multiphase ozonation solid catalyst for water treatment by using rare earth molecular sieve waste residues
CN109621944A (en) * 2018-11-28 2019-04-16 上海大学 The method for preparing integral catalyzer using waste sill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070256979A1 (en) * 2004-06-15 2007-11-08 Condit Randy G Hydrogen peroxide based water treatment system and method
CN103962149A (en) * 2013-09-06 2014-08-06 张振慧 Method for preparing multiphase ozonation solid catalyst for water treatment by using rare earth molecular sieve waste residues
CN103787488A (en) * 2014-02-10 2014-05-14 同济大学 Method of treating wastewater by catalyzing ozone to oxidize by using pyrite cinder
CN103922787A (en) * 2014-03-18 2014-07-16 北京大学 Method for preparing porous material by using titanium-containing blast furnace slag, and titanium-containing porous material
CN109621944A (en) * 2018-11-28 2019-04-16 上海大学 The method for preparing integral catalyzer using waste sill

Non-Patent Citations (1)

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Title
薛向欣等: "硫酸盐修饰的含钛高炉渣光催化还原Cr(VI)", 《东北大学学报（自然科学版）》 *

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