CN216728758U

CN216728758U - Waste incineration flying ash washing ball-milling processing system

Info

Publication number: CN216728758U
Application number: CN202121918656.3U
Authority: CN
Inventors: 李青春; 徐莉娟; 李想; 瞿军
Original assignee: Beijing Institute Of Mechanochemistry Co ltd
Current assignee: Beijing Institute Of Mechanochemistry Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-06-14
Anticipated expiration: 2031-08-16

Abstract

The utility model relates to a waste incineration fly ash washing ball-milling treatment system, which comprises: the utility model provides a waste incineration flying dust washing ball-milling processing system which characterized in that includes: a fly ash loading unit for transporting fly ash to the water washing unit; the washing unit is used for mixing the fly ash and water, filtering and drying the mixture to remove soluble chloride in the fly ash; the ball milling unit is used for realizing fly ash degradation and heavy metal solidification; a finished product storage unit for storage of the standard-reaching slag; the fly ash feeding unit, the water washing unit, the ball milling unit and the finished product storage unit are sequentially connected. The waste incineration fly ash washing ball-milling treatment system is used for realizing the degradation of waste incineration fly ash and the solidification of heavy metals, can effectively avoid the defects of high treatment cost, poor long-term stability of heavy metals, occupation of more land resources, generation of heavy metal waste gas, complex process, high energy consumption and the like in the prior art, and has the advantages of low cost, low energy consumption, simple process, good treatment effect, mechanical force, no chemical harm, energy conservation, environmental protection and the like.

Description

Waste incineration fly ash washing ball-milling processing system

Technical Field

The utility model relates to the fields of environmental protection technology and solid waste resource utilization, and further relates to a waste incineration fly ash washing ball milling treatment system.

Background

Chinese generates hundreds of millions of tons of domestic garbage every year and is gradually increased year by year. After the domestic garbage is burnt, a large amount of fly ash can be generated, the main components of the fly ash are molten silicate, chlorinated metal salt and the like, and if the fly ash is not treated properly, the fly ash is easy to pollute water, soil and air and can cause direct or indirect harm to human bodies.

The current treatment method of the fly ash generated by burning the household garbage mainly comprises the following steps: cement solidification-hazardous waste landfill method, fly ash chelation stabilization-sanitary landfill method, fly ash fusion processing method, fly ash sintered light aggregate method and fly ash cement kiln co-disposal method. The curing body in the cement curing-hazardous waste landfill method is high in safe landfill disposal cost, poor in long-term stability of heavy metal and low in strength of the cured body after treatment; the fly ash chelation stabilization-sanitary landfill method has higher requirement, needs more land resources and has high treatment cost; the fly ash melting treatment method can generate volatile heavy metal waste gas under the high temperature condition, and has complex process and large energy consumption; the fly ash lightweight aggregate sintering method has high roasting temperature and high cost; the fly ash is co-processed in the cement kiln, and has the disadvantages of small consumption of the cement kiln, high transportation cost and the need of long-distance transportation of the fly ash to enter the cement kiln.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a waste incineration fly ash washing ball-milling treatment system.

A waste incineration fly ash washing ball-milling processing system includes: the fly ash processing device comprises a fly ash feeding unit, a water washing unit, a ball milling unit and a finished product storage unit which are connected in sequence; the fly ash loading unit is used for transporting fly ash to the water washing unit; the water washing unit is used for mixing the fly ash and water, filtering and drying the mixture to remove soluble chloride in the fly ash; the ball milling unit is used for realizing the degradation of fly ash and the solidification of heavy metal; and the finished product storage unit is used for storing standard slag.

Furthermore, the fly ash loading unit comprises loading equipment, a sealing pipeline and a fly ash bin which are connected in sequence.

Further, the washing unit comprises stirring equipment, a sealed pipeline, a first pump, a sealed pipeline, filtering equipment, a belt and drying equipment which are connected in sequence.

Further, the stirring device has a first inlet and a second inlet; the outlet of the fly ash bin is connected with the first inlet of the stirring device through a sealing pipeline, so that fly ash can enter the stirring device.

Further, the washing unit further comprises a water storage device, a sealed pipeline and a second pump which are connected in sequence.

Further, the outlet of the second pump is connected with the second inlet of the stirring device through a sealed pipeline, so that water enters the stirring device.

Further, the filtering equipment is a plate-and-frame filter press.

Further, the drying device is a rotary dryer or a paddle dryer.

Furthermore, the ball milling unit comprises a feeding bin, a belt and high-performance ball milling equipment which are connected in sequence.

Further, the high-performance ball milling equipment is a stirring ball mill or a planetary ball mill.

Further, the finished product storage unit comprises a finished product storage device.

Has the advantages that: the waste incineration fly ash washing ball-milling treatment system is used for realizing the degradation and heavy metal solidification of the waste incineration fly ash, can effectively avoid the defects of high treatment cost, poor heavy metal long-term stability, occupation of more land resources, generation of heavy metal waste gas, complex process, high energy consumption and the like in the prior art, and has the advantages of low cost, low energy consumption, simple process, good treatment effect, harmless mechanical force chemistry, energy conservation, environmental protection and the like.

Drawings

FIG. 1 is a schematic view of a water-washing ball-milling treatment system for fly ash from waste incineration according to the present invention.

Description of the main elements

Waste incineration fly ash washing ball-milling processing system 1

Fly ash loading unit 10

Feeding equipment 11

Fly ash bin 12

Water washing unit 20

Stirring device 21

Water storage facility 22

Second pump 23

First pump 24

Filter device 25

Drying apparatus 26

First inlet 27

Second inlet 28

Ball milling unit 30

Feed bin 31

High performance ball milling apparatus 32

Finished product storage unit 40

Finished product storage device 41

Sealed conduit 50

Belt 60

Detailed Description

The following description will explain embodiments of the present invention in further detail with reference to fig. 1 of the specification. It should be noted that the components depicted in the referenced drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar terms.

Fig. 1 is a schematic view of a waste incineration fly ash water-washing ball-milling treatment system 1 according to the present invention. A waste incineration fly ash washing ball-milling processing system 1 includes: the device comprises a fly ash feeding unit 10, a water washing unit 20, a ball milling unit 30 and a finished product storage unit 40.

The outlet of the fly ash loading unit 10 is connected with the inlet of the water washing unit 20 through a sealing pipeline 50; the outlet of the water washing unit 20 is connected with the inlet of the ball milling unit 30 through a belt 60; the outlet of the ball milling unit 30 is connected to the inlet of the finished product storage unit 40 by a belt 60.

The fly ash loading unit 10 comprises a loading device 11, a sealing pipeline 50 and a fly ash bin 12 which are connected in sequence.

The water washing unit 20 includes a stirring device 21, a sealed pipeline 50, a first pump 24, a sealed pipeline 50, a filtering device 25, a belt 60 and a drying device 26, which are connected in sequence. The stirring device 21 has a first inlet 27 and a second inlet 28; the outlet of the fly ash silo 12 is connected to the first inlet 27 of the stirring device 21 via a sealed pipe 50 for fly ash to enter the stirring device 21.

The water washing unit 20 further comprises a water storage device 22, a sealed pipeline 50 and a second pump 23 which are connected in sequence, wherein an outlet of the second pump 23 is connected with the second inlet 28 of the stirring device 21 through the sealed pipeline 50, and is used for enabling water to enter the stirring device 21.

Preferably, the filtration apparatus 25 is a plate and frame filter press.

Preferably, the drying apparatus 26 is a rotary dryer or a paddle dryer.

The ball milling unit 30 comprises a feeding bin 31, a belt 50 and a high-performance ball milling device 32 which are connected in sequence.

Preferably, the high performance ball milling apparatus 32 is a stirred ball mill or a planetary ball mill.

The finished product storage unit 40 includes a finished product storage apparatus 41.

Provides a specific implementation process for treating fly ash by a waste incineration fly ash water-washing ball-milling treatment system.

Example 1:

the loading device 11 transports the fly ash (fly ash is gray powder, the diameter is 10-100 μm, and the main components are fused silicate, chlorinated metal salt, etc.) incinerated by the domestic garbage to the fly ash bunker 12 through the sealed pipeline 50, and then transports the fly ash to the stirring device 21 through the sealed pipeline 50. The water (normal temperature tap water) in the water storage device 22 enters the stirring device 21 through the sealed pipeline 50, the second pump 23 and the sealed pipeline 50. In the stirring device 21, the fly ash is mixed with water (water-to-ash ratio is 1.5:1), stirring is carried out for 30min, so as to obtain pasty ash-water mixed slurry, the ash-water mixed slurry enters the first pump 24 through the sealed pipeline 50 and is transported to the filtering device 25 through the sealed pipeline 50, and the filtering device 25 filters out undissolved solids in the ash-water mixture through a filter screen, so as to leave washing slag (the main component is molten silicate) in a semi-dry state. The washing slag is transported to the drying device 26 by the belt 60, and the water in the washing slag is evaporated by the drying action of the drying device, so that powdery drying slag (the main components are molten silicate and the like) is obtained. The dry slag enters the feeding bin 31 through the belt 60 and enters the high-performance ball milling equipment 32 through the sealing pipeline 50, the grinding balls are added into the ball milling equipment 32, and the mass ratio of the dry slag to the grinding balls is 1: 5, setting the rotating speed to 350rpm, and performing ball milling for 1 hour at room temperature in an air atmosphere to obtain ball milling residues. The ball milling slag is transported to a finished product storage device 41 through a belt 60 to obtain standard slag, and the standard slag can be used as a cement raw material or a brick making raw material for subsequent use.

Detecting the components of the fly ash and the standard slag, and finding that the dioxin degradation rate reaches 85.3 percent; leaching heavy metals to reach the standard; the chlorine content of the slag reaching the standard is reduced to 0.65 percent, and the main components are molten silicate and the like. Through the waste incineration fly ash washing ball-milling system, the fly ash degradation and heavy metal solidification are realized.

The above description is only one embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the utility model are to be considered as within the scope of the utility model.

Claims

1. The utility model provides a waste incineration flying dust washing ball-milling processing system which characterized in that includes: a fly ash loading unit for transporting fly ash to the water washing unit; the washing unit is used for mixing the fly ash and water, filtering and drying the mixture to remove soluble chloride in the fly ash; the ball milling unit is used for realizing fly ash degradation and heavy metal solidification; a finished product storage unit for storage of the standard-reaching slag; the fly ash feeding unit, the water washing unit, the ball milling unit and the finished product storage unit are sequentially connected.

2. The waste incineration fly ash washing ball milling treatment system as claimed in claim 1, wherein the washing unit comprises a stirring device, a sealed pipeline, a first pump, a sealed pipeline, a filtering device, a belt and a drying device which are connected in sequence.

3. The waste incineration fly ash water-washing ball-milling treatment system according to claim 2, wherein the stirring device has a first inlet and a second inlet; the outlet of the fly ash bin is connected with the first inlet of the stirring device through a sealing pipeline.

4. The waste incineration fly ash washing ball milling treatment system of claim 3, wherein the washing unit further comprises a water storage device, a sealed pipeline and a second pump which are connected in sequence.

5. The waste incineration fly ash washing ball milling treatment system as claimed in claim 4, wherein the outlet of the second pump is connected with the second inlet of the stirring device through a sealed pipeline.

6. The waste incineration fly ash water-washing ball-milling treatment system of claim 5, wherein the filtering device is a plate-and-frame filter press.

7. The waste incineration fly ash washing ball milling treatment system according to claim 6, wherein the drying device is a rotary dryer or a paddle dryer.

8. The waste incineration fly ash washing ball milling treatment system of claim 7, wherein the ball milling unit comprises a feeding bin, a belt and a high-performance ball milling device which are connected in sequence.

9. The waste incineration fly ash water washing ball milling treatment system of claim 8, wherein the high performance ball milling device is a stirred ball mill or a planetary ball mill.

10. The waste incineration fly ash water-washing ball-milling treatment system of claim 9, wherein the finished product storage unit comprises a finished product storage device.