CN109316705A

CN109316705A - Compound waste incineration chelating agent and preparation method thereof

Info

Publication number: CN109316705A
Application number: CN201811472033.0A
Authority: CN
Inventors: 陈飞; 赵士化; 周翔; 蒋卫国
Original assignee: Hefei Quan Sheng Environmental Protection & Technology Co Ltd
Current assignee: Hefei Quan Sheng Environmental Protection & Technology Co Ltd
Priority date: 2018-12-04
Filing date: 2018-12-04
Publication date: 2019-02-12

Abstract

The present invention discloses a kind of compound waste incineration chelating agent, including following components: 20~40 parts of sodium dimethyl dithiocarbamate, 10~20 parts of sodium dihydrogen phosphates, and 2~10 parts of EDETATE SODIUM, 4~10 parts of nano-sized carbon, 4~8 parts of surfactant, 60~100 parts of water.So that treated, heavy metal complex leaching concentration is substantially reduced, at low cost.

Description

Compound waste incineration chelating agent and preparation method thereof

Technical field

The present invention relates to field of domestic garbage treatment, and in particular to a kind of compound waste incineration chelating agent and its preparation side Method.

Background technique

Domestic garbage incineration flyash complicated component, the heavy metal containing higher leaching concentration, such as Pb, Cr, Cd, Cu, Hg and Zn etc., is listed in danger wastes, and the heavy metal with high Leaching has serious harm to environment.Heavy metal is in ring Constantly migrate, convert in border, contaminated soil and water environment can not be realized by the catharsis of itself and be eliminated, and cannot be by Microorganism decomposition, and being enriched with by biological chain, therefore flying dust is dealt with improperly and will lead to pollutant Heavy metals therein and arrive In environment, serious harm is caused to human health and natural environment.

Currently, one is use cement solidification technology counterweight in flying dust there are mainly three types of the processing methods of heavy metal component Metal-cured processing, heavy metal are reacted by ion exchange, passivation, absorption, chemisorption, sedimentation with the cement of aquation, finally The more stable compound such as hydroxide or complex compound, but the party are formed on the surface hydrated silicate colloid C-H-S of cement The shortcomings that method has the increase-volume amount of flying dust big, increases the volume of landfill；Second is that melting and solidification method, this method be it is generally acknowledged at present most For safe and stable flying ash stabilizing/curing technology, flying ash is mainly mixed with nature of glass powder and is made by this method Grain molding, melts a period of time, but this method has the shortcomings that energy consumption is high under 1000~1400 DEG C of high temperature；Third is that chemical agent Stabilization method, chemical agent is by the chemical reaction with heavy metal by its ion transit at low-solubility, the macromolecule of low migration Complex compound or inorganic mineral, core are the selection of chelating agent, especially chemical agent to a main pollution huge sum of money Belong to the selectivity of ion, and generate the stability of complex compound, especially to the leachability of acid solution；It currently on the market can be into In the method for row industrialized production, the complex compound that generates with heavy metal can leaching concentration it is high, be unable to satisfy environmentally friendly needs.

Summary of the invention

The present invention provides a kind of compound waste incineration chelating agent and preparation method thereof, so that treated heavy metal complexing Object leaching concentration substantially reduces, at low cost.

To achieve the goals above, the invention adopts the following technical scheme: a kind of compound waste incineration chelating agent, including Following components: 20~40 parts of sodium dimethyl dithiocarbamate, 10~20 parts of sodium dihydrogen phosphates, are received by 2~10 parts of EDETATE SODIUM 4~10 parts of carbon, 4~8 parts of surfactant, 60~100 parts of water of rice.

Preferably, including following components: 30 parts of sodium dimethyl dithiocarbamate, 15 parts of sodium dihydrogen phosphates, EDTA bis- 6 parts of sodium, 7 parts of nano-sized carbon, 6 parts of surfactant, 80 parts of water.

Further, the nano-sized carbon partial size is 60~80nm.

Further, the surfactant is lauryl sodium sulfate.

Further, the water is industrial water.Industrial water low cost, has saved cost, also can reach same Effect.

In order to further realize this programme, the application discloses a kind of preparation method of association complex, including following step It is rapid:

1) by 20~40 parts of sodium dimethyl dithiocarbamate, 10~20 parts of sodium dihydrogen phosphates, EDETATE SODIUM 2 under room temperature ~10 parts of 10~20min of stirring；

2) 4~10 parts of nano-sized carbon, 4~8 parts of 60~100 parts of water, surfactant 4~6min of ultrasonic disperse is added, obtains Association complex.It is easy to operate, it is suitble to small-sized treatment plant to prepare.

Bring of the present invention has the beneficial effect that 1) compound chelating agent, surfactant can be anti-with numerous heavy metal ion It answers, reaction effect more preferably, promotes heavy metal to form heavy metal complex faster；

2) formula material of the invention is easy to get, effect is good, safety and environmental protection, at low cost, not only mitigates bulky refuse treatment plant Burden, while be more suitable for small-sized rubbish treatment plant use；

3) the application joined nano-sized carbon, so that the stability of heavy metal complex greatly increases, hence it is evident that reduce leaching Toxicity realizes the purpose of the low evilization of incineration of refuse flyash；

4) preparation method of chelating agent of the present invention is easy to operate, without putting into high-cost instrument, has saved garbage disposal Cost.

Specific embodiment

The present invention is described in detail combined with specific embodiments below.

Embodiment 1

1) by 20 parts of sodium dimethyl dithiocarbamate, 10 parts of sodium dihydrogen phosphates, 2 parts of EDETATE SODIUM stirrings under room temperature 10min；

2) be added 4 parts of nano-sized carbon (partial size 60nm), 60 parts of industrial water, 4 parts of ultrasonic disperses 4 of lauryl sodium sulfate~ 6min obtains association complex.

Obtained chelating agent is used to handle the flying dust of certain destructor plant, data comparison is shown in Table 1.

Embodiment 2

) under room temperature by 30 parts of sodium dimethyl dithiocarbamate, 15 parts of sodium dihydrogen phosphates, 6 parts of EDETATE SODIUM stirrings 15min；

2) be added 7 parts of nano-sized carbon (partial size 70nm), 80 parts of industrial water, 6 parts of ultrasonic disperses 4 of lauryl sodium sulfate~ 6min obtains association complex.

Embodiment 3

) under room temperature by 40 parts of sodium dimethyl dithiocarbamate, 20 parts of sodium dihydrogen phosphates, 10 parts of EDETATE SODIUM stirrings 20min；

2) be added 10 parts of nano-sized carbon (partial size 80nm), 100 parts of industrial water, 8 parts of ultrasonic disperses 4 of lauryl sodium sulfate~ 6min obtains association complex.

Reference examples 1

) under room temperature by 20~40 parts of sodium dimethyl dithiocarbamate, 2~10 parts of 10~20min of stirring of EDETATE SODIUM；

2) 4~8 parts of 60~100 parts of water, lauryl sodium sulfate 4~6min of ultrasonic disperse is added, obtains association complex.

Table 1

Above-described is only embodiments of the present invention, for those of ordinary skill in the art, is not being departed from Under the premise of the invention is conceived, improvement can also be made, but these are all belonged to the scope of protection of the present invention.

Claims

1. a kind of compound waste incineration chelating agent and preparation method thereof, it is characterised in that: including following components: 20~40 part two Sodium dimethyldithiocar-bamate (SDDC), 10~20 parts of sodium dihydrogen phosphates, 2~10 parts of EDETATE SODIUM, 4~10 parts of nano-sized carbon, surface is living 4~8 parts of agent, 60~100 parts of water of property.

2. compound waste incineration chelating agent according to claim 1, it is characterised in that: including following components: 30 part two Sodium dimethyldithiocar-bamate (SDDC), 15 parts of sodium dihydrogen phosphates, 6 parts of EDETATE SODIUM, 7 parts of nano-sized carbon, 6 parts of surfactant, water 80 Part.

3. compound waste incineration chelating agent according to claim 2, it is characterised in that: the nano-sized carbon partial size is 60 ~80nm.

4. compound waste incineration chelating agent according to claim 3, it is characterised in that: the surfactant is ten Sodium dialkyl sulfate.

5. compound waste incineration chelating agent according to claim 1 to 4, it is characterised in that: the water is industry Use water.

6. a kind of method for preparing association complex described in claim 1, which comprises the following steps:

1) by 20~40 parts of sodium dimethyl dithiocarbamate, 10~20 parts of sodium dihydrogen phosphates, EDETATE SODIUM 2~10 under room temperature 10~20min of part stirring；

2) 4~10 parts of nano-sized carbon, 4~8 parts of 60~100 parts of water, surfactant 4~6min of ultrasonic disperse is added, obtains compound Chelating agent.