CN105110506A - Acid mine drainage/refuse incineration fly ash coupled stabilization treatment method - Google Patents

Acid mine drainage/refuse incineration fly ash coupled stabilization treatment method Download PDF

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Publication number
CN105110506A
CN105110506A CN201510541965.6A CN201510541965A CN105110506A CN 105110506 A CN105110506 A CN 105110506A CN 201510541965 A CN201510541965 A CN 201510541965A CN 105110506 A CN105110506 A CN 105110506A
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China
Prior art keywords
incineration
mine
refuse flyash
clear liquid
stabilization treatment
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Pending
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CN201510541965.6A
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Chinese (zh)
Inventor
孙福成
张佳萍
戚路
赵浙卿
冯一舰
孙璐
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Zhejiang Environmental Science Research and Design Institute
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Zhejiang Environmental Science Research and Design Institute
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Priority to CN201510541965.6A priority Critical patent/CN105110506A/en
Publication of CN105110506A publication Critical patent/CN105110506A/en
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Abstract

The invention discloses an acid mine drainage/refuse incineration fly ash coupled stabilization treatment method which comprises the following steps: (1) under the conditions of normal temperature and pressure, taking acid mine drainage, adding refuse incineration fly ash in the stirring process to regulate the pH value to 3-5, standing, and carrying out precipitation separation to obtain a clear solution and sludge; (2) adding refuse incineration fly ash into the clear solution obtained in the step (1) to regulate the pH value to neutrality, standing, and carrying out precipitation separation to obtain a clear solution and sludge; (3) adding refuse incineration fly ash into the clear solution obtained in the step (2) to regulate the pH value of the clear solution to 10-12, standing, carrying out precipitation separation to obtain a clear solution and sludge, regulating the clear solution to neutrality, and discharging; and (4) mixing the sludge obtained in the steps (1)-(3), adding a heavy metal stabilizer, uniformly mixing and standing. The weak alkalinity of the refuse incineration fly ash is utilized to perform neutralization pretreatment on the acid mine drainage. The pH value is regulated to near neutrality, and advanced treatment is performed to implement stabilization treatment on the acid drainage and fly ash.

Description

A kind of acid wastewater in mine is coupled with incineration of refuse flyash stabilization treatment method
Technical field
The present invention relates to environmental chemistry field, be specifically related to a kind of acid wastewater in mine and be coupled with incineration of refuse flyash stabilization altogether method of disposal.
Background technology
Along with the quickening of urbanization process and improving constantly of people's levels of substance, the generation of domestic refuse is increasing, increases progressively rapidly every year with the rate of increase of 8% ~ 10%.Burning can reduce the volume of rubbish 90%, have that processing speed is fast, floor space is little, minimizing and innoxious efficiency high, can the advantages such as resource utilization recovery be carried out.Incineration of refuse flyash is weakly alkaline (pH ≈ 11), containing plurality of heavy metal and organic pollutant, be the danger wastes that national standard (GB18485-2001) specifies, entering hazardous waste landfill after solidification treatment is the main outlet that flying dust is disposed.But enter landfill yard after flyash curing, cause landfill yard capacity and flying dust increase fast between contradiction day by day show especially, be exaggerated the environment of flying dust problem, health and safety risk.
Such as, publication number is the treatment process that the Chinese invention patent application document of CN103170488A discloses a kind of incineration of refuse flyash solidifying agent and incineration of refuse flyash, and incineration of refuse flyash solidifying agent comprises light-magnesite powder; The treatment process of incineration of refuse flyash comprises: mixed with incineration of refuse flyash solidifying agent and water by pending incineration of refuse flyash, obtain liquid-solid mixture, be then cured by liquid-solid mixture, obtain cured body.
Acid wastewater in mine be recovery process and discarded after, pit and ettle is oxidated and rain drop erosion effect formed.The acid wastewater in mine water yield is comparatively large, pH value lower (pH ≈ 3), containing the vitriol of high density and the heavy metal ion of solubility.China's coal-mine, sulfurous iron ore are distributed more widely, and sulfurous iron ore is modal sulfide mineral in the Sulphide Ores such as Pb, Zn and coal stratum, are also the major causes producing acid wastewater in mine.Along with the development of mining, coal mining industry, the acid wastewater in mine problem of China is also on the rise.
Such as, publication number is a kind of reaction tank and the method that the Chinese invention patent application document of CN102765830A discloses same for treating acidic mine wastewater, comprise pond body, in the body of pond civil engineering structure surface on inlayed basic material layer, by the particulate matter precipitation process of acidic mine waste water and pH regulator process synthesis in a reaction tank, the basic material layer be embedded on civil engineering structure surface is utilized to form a part for civil engineering structure, carry out particulate matter precipitation and pH regulator simultaneously, complete the process of acidic mine waste water.Publication number is the method that the Chinese invention patent application document of CN101704593A discloses the separation of a kind of zinc, iron, manganese in acidic mine waste and reclaims, adopt the absorption of mechanical activation sulfurous iron ore, oxidation precipitation and neutralization precipitation same for treating acidic mine wastewater, make zinc in waste water, iron, manganese obtain being separated and reclaiming.
But the technology that acid wastewater in mine and incineration of refuse flyash carry out stabilization treatment is simultaneously had no report.
Summary of the invention
The invention discloses a kind of acid wastewater in mine to be coupled with incineration of refuse flyash stabilization treatment method, solve innoxious, the stabilization treatment problem of acid wastewater in mine and incineration of refuse flyash two kinds of Hazardous wastess simultaneously.
A kind of acid wastewater in mine is coupled with incineration of refuse flyash stabilization treatment method, comprises the steps:
(1) under normal temperature and pressure, get acid wastewater in mine, add pH value to 3 ~ 5 that incineration of refuse flyash regulates acid wastewater in mine in whipping process, staticly settle separation, obtain clear liquid and mud;
(2) in step (1) gained clear liquid, add incineration of refuse flyash again regulates the pH value of clear liquid to neutral, staticly settles separation, obtains clear liquid and mud;
(3) in step (2) gained clear liquid, add pH value to 10 ~ 12 that incineration of refuse flyash regulates clear liquid again, staticly settle separation, obtain clear liquid and mud, clear liquid is adjusted to neutral rear discharge;
(4) by gained mud mixing in step (1) ~ (3), then add heavy metal stable pharmaceutical, mix rear leaving standstill.
The present invention utilizes the weakly alkaline of incineration of refuse flyash, carries out Pre process to acid wastewater in mine.By pH regulator weakly acidic pH, and by advanced treatment, realize acid waste water and stabilizing fly ash process.
Described acid wastewater in mine is based on the mine wastewater of sulfurous iron ore mineral ore, and heavy metal in waste water element is at least one in Cu, Zn, Cd, Mn and Pb; Described incineration of refuse flyash is fly ash from burning city domestic garbage, and heavy metal element is at least one in Zn, Cd, Cr and Pb.
Preferably, described heavy metal stable pharmaceutical is the mixture of phosphoric acid salt and silicate cement; Further, in mixture, phosphate anion and Heavy Metals in Sludge mol ratio are 2:3, and the mass ratio of silicate cement and mud is 1:2.Further preferably, described phosphoric acid salt is SODIUM PHOSPHATE, MONOBASIC or potassium primary phosphate.
Most preferably, the pH value to 4 of acid wastewater in mine is regulated in step (1); In step (2): add the pH value to 7 that incineration of refuse flyash regulates clear liquid again in step (1) gained clear liquid; In step (3): add the pH value to 11 that incineration of refuse flyash regulates clear liquid again in step (2) gained clear liquid.
The present invention utilizes the weakly alkaline of incineration of refuse flyash, carries out Pre process to acid wastewater in mine.By pH regulator weakly acidic pH, and by advanced treatment, solve innoxious, the stabilization treatment problem of acid wastewater in mine and incineration of refuse flyash two kinds of Hazardous wastess simultaneously.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Figure 2 shows that flying dust add-on and waste water ph variation diagram.
Embodiment
Embodiment 1
The initial pH of acid wastewater in mine is 2.33, and by adding incineration of refuse flyash, pH constantly rises, be rise slowly near 3-4 at pH, until flying dust dosage is greater than more than 15g, pH continues rising, when dosage reaches 24g, pH is 10.4, and progressively tend to be steady afterwards, final pH is about 11.Figure 2 shows that flying dust add-on and waste water ph variation diagram, wherein, pH does not linearly increase along with the increase of flying dust dosage near 3-4, is because of Fe in waste water 3+be precipitated as Fe (OH) 3time, consume OH-in a large number, thus within the specific limits, the pH value in maintenance waste water is without larger change.
Embodiment 2
Reference process flow sheet as shown in Figure 1, under normal temperature normality, get certain based on the acid waste water in the mine of sulfurous iron ore mineral ore, its heavy metal element is mainly Cu, Zn, Cd, Mn, Pb; The initial pH of waste water is 2.33, and limit is stirred and added incineration of refuse flyash, regulates pH first to about 4, staticly settles separation; Add incineration of refuse flyash again and regulate about pH to 7, staticly settle separation; Be adjusted to pH to 11 again, precipitation, standing, separation;
By adding acid for adjusting pH to neutral in waste water after final mud-water separation, measure its heavy metal concentration, the acid wastewater in mine pollutent index after process is as shown in table 1:
Acid wastewater in mine pollutent index (mg/L) after table 1 processes
Note: wastewater discharge standard is " integrated wastewater discharge standard " GB8978-1996
As shown in Table 1, wherein, Cu, Pb, Zn, Cd, Mn, Fe, As concentration all has the decline of certain amplitude, and clearance is respectively 74.5%, 72.1%, 93.7%, 76.1%, 79.3%, 59.8%, 100%.
By all mud mixing produced in technical process, after then adding phosphoric acid salt+cement mixing solidification, the mine flying dust pollutent index after process is as shown in table 2:
TCLP data before and after the process of table 2 flying dust
As seen from the results in Table 2, incineration of refuse flyash is through acid waste water coupling processing, and after phosphoric acid salt+cement mixing solidification, Leaching of Heavy Metals concentration all has reduction in various degree, wherein, the stabilization treatment effect of Cu and Cr is general, leaching concentration reduce respectively 20.1% and 28%, Pb, Zn and Cd reduce 92.1%, 73.4% and 95.2% respectively.(GB5085.3-2007) requirement that incineration of refuse flyash after process can meet " Hazardous wastes judging standard-leaching characteristic identification ", resourcebility utilizes or security landfill.

Claims (8)

1. acid wastewater in mine is coupled with incineration of refuse flyash a stabilization treatment method, it is characterized in that, comprises the steps:
(1) under normal temperature and pressure, get acid wastewater in mine, add pH value to 3 ~ 5 that incineration of refuse flyash regulates acid wastewater in mine in whipping process, staticly settle separation, obtain clear liquid and mud;
(2) in step (1) gained clear liquid, add incineration of refuse flyash again regulates the pH value of clear liquid to neutral, staticly settles separation, obtains clear liquid and mud;
(3) in step (2) gained clear liquid, add pH value to 10 ~ 12 that incineration of refuse flyash regulates clear liquid again, staticly settle separation, obtain clear liquid and mud, clear liquid acid adding is discharged after being adjusted to pH neutrality;
(4) by gained mud mixing in step (1) ~ (3), then add heavy metal stable pharmaceutical, mix rear leaving standstill.
2. acid wastewater in mine is coupled with incineration of refuse flyash stabilization treatment method according to claim 1, it is characterized in that, described acid wastewater in mine is based on the mine wastewater of sulfurous iron ore mineral ore, and heavy metal in waste water element is at least one in Cu, Zn, Cd, Mn and Pb.
3. acid wastewater in mine is coupled with incineration of refuse flyash stabilization treatment method according to claim 1, and it is characterized in that, described incineration of refuse flyash is fly ash from burning city domestic garbage, and heavy metal element is at least one in Zn, Cd, Cr and Pb.
4. acid wastewater in mine is coupled with incineration of refuse flyash stabilization treatment method according to claim 1, and it is characterized in that, described heavy metal stable pharmaceutical is the mixture of phosphoric acid salt and silicate cement.
5. acid wastewater in mine is coupled with incineration of refuse flyash stabilization treatment method according to claim 4, and it is characterized in that, described phosphoric acid salt is SODIUM PHOSPHATE, MONOBASIC or potassium primary phosphate.
6. acid wastewater in mine is coupled with incineration of refuse flyash stabilization treatment method according to claim 1, it is characterized in that, regulates the pH value to 4 of acid wastewater in mine in step (1).
7. acid wastewater in mine is coupled with incineration of refuse flyash stabilization treatment method according to claim 1, it is characterized in that, in step (2): in step (1) gained clear liquid, add the pH value to 7 that incineration of refuse flyash regulates clear liquid again.
8. acid wastewater in mine is coupled with incineration of refuse flyash stabilization treatment method according to claim 1, it is characterized in that, in step (3): in step (2) gained clear liquid, add the pH value to 11 that incineration of refuse flyash regulates clear liquid again.
CN201510541965.6A 2015-08-28 2015-08-28 Acid mine drainage/refuse incineration fly ash coupled stabilization treatment method Pending CN105110506A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105731691A (en) * 2016-03-30 2016-07-06 浙江省环境保护科学设计研究院 Coupled stabilizing treatment method for acid wastewater and incineration ash
CN106882779A (en) * 2017-03-23 2017-06-23 武汉纺织大学 A kind of method that phosphorus is reclaimed from city garbage burning flying ash
WO2018120051A1 (en) * 2016-12-30 2018-07-05 深圳市能源环保有限公司 Waste incineration fly ash stabilizing agent and preparation method therefor
CN109985891A (en) * 2019-03-22 2019-07-09 昆明理工大学 A kind of acidity tailing soil processing method
CN110341049A (en) * 2019-06-13 2019-10-18 无锡市华星东方电力环保科技有限公司 A kind of stabilizing fly ash processing system and technique
CN111018190A (en) * 2019-12-27 2020-04-17 中南大学 Acid mine wastewater treatment method based on engineering barrier multistage time sequence resistance control
CN111101538A (en) * 2020-01-09 2020-05-05 中南大学 Construction method of vertical engineering barrier system for neutralizing acid mine wastewater

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US20100282686A1 (en) * 2007-11-05 2010-11-11 Sharkey Jr William S Method for the treatment of acid mine drainage
CN101972766A (en) * 2010-08-30 2011-02-16 天津渤海环保工程有限公司 Refuse incineration fly ash solidification/stabilization treatment method

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105731691A (en) * 2016-03-30 2016-07-06 浙江省环境保护科学设计研究院 Coupled stabilizing treatment method for acid wastewater and incineration ash
WO2018120051A1 (en) * 2016-12-30 2018-07-05 深圳市能源环保有限公司 Waste incineration fly ash stabilizing agent and preparation method therefor
CN106882779A (en) * 2017-03-23 2017-06-23 武汉纺织大学 A kind of method that phosphorus is reclaimed from city garbage burning flying ash
CN109985891A (en) * 2019-03-22 2019-07-09 昆明理工大学 A kind of acidity tailing soil processing method
CN110341049A (en) * 2019-06-13 2019-10-18 无锡市华星东方电力环保科技有限公司 A kind of stabilizing fly ash processing system and technique
CN111018190A (en) * 2019-12-27 2020-04-17 中南大学 Acid mine wastewater treatment method based on engineering barrier multistage time sequence resistance control
CN111101538A (en) * 2020-01-09 2020-05-05 中南大学 Construction method of vertical engineering barrier system for neutralizing acid mine wastewater
CN111101538B (en) * 2020-01-09 2021-04-06 中南大学 Construction method of vertical engineering barrier system for neutralizing acid mine wastewater

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