CN104801530B - Process for landfill of sludge and coal gangue together - Google Patents
Process for landfill of sludge and coal gangue together Download PDFInfo
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- CN104801530B CN104801530B CN201510199340.6A CN201510199340A CN104801530B CN 104801530 B CN104801530 B CN 104801530B CN 201510199340 A CN201510199340 A CN 201510199340A CN 104801530 B CN104801530 B CN 104801530B
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- gangue
- landfill
- dewatered sludge
- sludge
- mud
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Abstract
The invention relates to a process for landfill of sludge and coal gangue together. The process comprises the following steps: (1) performing half-dry pretreatment on dewatered sludge; (2) performing pre-crushing treatment on coal gangue, and screening; (3) performing landfill of the sludge and the coal gangue which are subjected to pretreatment together. During landfill, the sludge and the coal gangue are laid at intervals by adopting a layered laying method, and the sludge in the half-dry state is supported under the distance separation action of the coal gangue, so that time and space for secondary drying of the sludge in a coal gangue field are provided. Aiming at plains and valleys, different sludge landfill processes such as 'stacked on the plains' or 'valley type' can be adopted respectively. According to the process, the landfill of sludge and coal gangue can be taken into consideration comprehensively, and not only is the problem of sludge landfill solved, but also the effective use of the coal gangue field is promoted; through adoption of the process, the environmental quality of a coal-producing area is improved, contribution to promotion of social and economic sustainable development is made, and the implementation operability is high.
Description
Technical field
The invention belongs to field of environment pollution control, be specifically related to a kind of mud-gangue landfill process altogether.
Background technology
Along with the development of sewage treatment industry, mud produced by sewage treatment plant is continuously increased.Mud final
Outlet is the huge difficult problem that sewage treatment plant faces at present.Mud can not properly be disposed, and the harm to environment is huge
Big.Owing to the moisture content of conventional sewage plants mud reaches about 80%, after entering common household refuse landfill sites, can lead
Cause rolls difficulty, thus refuse landfill is not willing to accept Sewage Plant dewatered sludge and enters.
Gangue is the solid waste of discharge during coal-producing area coal mining process and coal washing, be a kind of in coalification course with
A kind of phosphorus content of coal seam association is relatively low, containing sulfide and the black gray expandable rock harder than coal.China the most averagely produces 100,000,000 tons
Coal, discharges spoil about about 14,000,000 tons；From the point of view of coal preparation, 100,000,000 tons of coking coal discharge spoil amounts of every washing are about
20000000 tons, often wash 100,000,000 tons of thermal coals, discharge spoil amount about 15,000,000 tons.Thus, the existing hillock in colliery, the whole nation nearly 1500
Remaining seat, accumulating amount more than 3,000,000,000 tons (accounting for more than the 40% of Chinese industrial solid waste total emission volumn), take up an area 1.3 ten thousand hectares, and
With the speed increase of about 100,000,000 tons every year, form newly-increased occupation of land more than 400 hectare, it has also become China's cumulative stock and occupation of land are most
Industrial waste.And the disposal options of whole nation gangue at present only stores up the mode of disposal, a large amount of stackings of gangue, not only press
Account for soil, more seriously have a strong impact on ecological environment.
Summary of the invention
The technical problem to be solved is to provide a kind of mud-gangue landfill process altogether, it is achieved that dehydration dirt
Fill while mud and gangue, not only can solve the difficulty of dewatered sludge landfill, and can promote that gangue is the most sharp
With.
Technical scheme: a kind of mud-gangue landfill process altogether, comprises the following steps:
Step 1: the semi-oriented process of dewatered sludge, by sewage treatment plant's moisture content be 75～85% dewatered sludge pour into and stir
Mixing in machine, add drying agent in blender, dewatered sludge with the volume ratio of drying agent is, dewatered sludge: drying agent=80:
20, open blender, the rotating speed of blender is adjusted to middling speed, stir 20min, by the dewatered sludge mixture that is stirred from stirring
Machine draws off, naturally dries 30min, obtain the dewatered sludge that moisture content is 65～70%；
Step 2: gangue precrushing processes, by crusher in crushing and sieves gangue, makes gangue become
Granularity is the single-size of 5 ~ 10mm；
Step 3: implement landfill process, first uses the coal gangue particle of step 2 to lay bastard coal ground mass in place, default ground
Plinth layer, then on gangue basal layer, carry out dewatered sludge landfill, then use the method that layering is alternately laid, by step 1
The coal gangue particle interval of dewatered sludge and step 2 is laid, and by dewatered sludge landfill in the wall of gangue, utilizes bastard coal
The spatial separation effect of stone, supports the dewatered sludge of leather hard, makes dewatered sludge obtain secondary in gangue field and dries
The time and space；
According to flat-bottomed land, the difference of land in gully in step 3, the heap-type that can burn sth to the ground Sludge landfill technique and cheuch
Type Sludge landfill technique two kinds；
When filling physical features and being flat-bottomed land, use level land to play heap-type Sludge landfill technique, first utilize step in place surrounding
The gangue of rapid 2 assembles becomes border dike, and the height of border dike is 80～100cm, top width 40～60cm, and grade of side slope is 1:1,
The gangue basal layer that bottom laying depth is 30～50cm in the region that border dike surrounds, fills on gangue basal layer
The dewatered sludge of step 1, laying dewatered sludge thickness is 50～60cm, then uses the method that layering is alternately laid, will dehydration
Mud and gangue interval are laid, by dewatered sludge landfill in gangue wall.The border dike of last layer taking off at next layer
Sewage sludge layer top is built, and the physical dimension of each layer border dike is identical, the height at the top away from lower floor's border dike, the bottom of upper strata border dike
For 20cm.Being provided with the width constructed with gangue in the bottom of upper strata border dike is 30～40cm, and height is the support of 50～60cm
Body.
When filling physical features and being land in gully, use gully type Sludge landfill technique, the most in the venue finishing ditch valley portions
The Trapezoidal cheuch that width is 120～150cm, grade of side slope is 1:1, at ditch valley portions and the uniform laying depth of side slope 30～
The gangue basal layer of 40cm, on gangue basal layer fill step 1 dewatered sludge, lay dewatered sludge thickness be 50～
60cm, then uses the method that layering is alternately laid, and dewatered sludge and gangue is spaced and lays, by dewatered sludge landfill in coal
In spoil wall.
Described drying agent is the mixture of flyash and quick lime, and flyash with the volume ratio of quick lime is, flyash: raw
Calx=15:5.
The gangue thickness of described gangue wall is 20～30cm, and the granularity of gangue is 5～10mm.
The present invention compared with prior art has the advantages that
1, the landfill of the landfill of dewatered sludge with gangue is considered, taken into account the disposal of dewatered sludge and gangue
Problem, not only can solve the difficulty of dewatered sludge landfill, and can promote effective utilization of gangue.
2, by the laying of gangue, border dike is connected as a single entity with bastard coal rock layers, improves the mechanics of gangue construct
Stability.
3, utilize basal layer that gangue assembles, wall, border dike, dewatered sludge is surrounded and is closed in wherein, a side
In the face of dewatered sludge serves stable curing effect, on the other hand make use of the spatial separation effect of gangue, support half-dried
The dewatered sludge of state, makes dewatered sludge have the time and space that secondary dries in barrow.
4, gangue is in stacking process, and the calorific value of himself can cause a certain degree of spontaneous combustion, this Spontaneous firing effect institute
Dewatered sludge can be played the effect of drying by the heat produced, and accelerates the mummification of dewatered sludge.
5, the enforcement of the present invention can improve coal-producing area environmental quality, promotes that Sustainable Socioeconomic Development is contributed share,
And workable, it is simple to implement.
Accompanying drawing explanation
Fig. 1 is the construction technology structure chart of the embodiment of the present invention 1.
Fig. 2 is the cell process structure figure of the embodiment of the present invention 2.
In figure: 1-border dike, 2-gangue wall, 3-supporter, 4-dewatered sludge, 5-gangue basal layer, 6-side slope.
Detailed description of the invention
For making those skilled in the art be more fully understood that the present invention, below in conjunction with Figure of description, the present invention is made further
Explanation.
Embodiment 1
The landfill process test altogether of mud-gangue is carried out in dewatered sludge landfill field, Jincheng City, Shanxi Province.
A kind of dewatered sludge-gangue landfill process altogether, comprises the following steps:
Step 1: the dewatered sludge that Jincheng City sewage treatment plant moisture content is 85% is poured in blender, in blender
Adding drying agent, described drying agent uses the mixture of flyash and quick lime, adds fashionable according to, dewatered sludge: flyash:
The volume ratio of quick lime=80:15:5, opens blender, the rotating speed of blender is adjusted to middling speed, and 60～100r/min, stirring
20min, draws off the dewatered sludge mixture being stirred from blender, naturally dries 30min, make the moisture content of dewatered sludge
It is reduced to 70%.
Step 2: gangue Shanxi Jincheng Anthracite Mining Industry Group Co., Ltd. drawn passes through crusher in crushing
And sieve, make gangue become single-size that granularity is 5 ~ 10mm；
Step 3: select flat-bottomed land as landfill place, use level land to play heap-type Sludge landfill technique, as it is shown in figure 1,
First utilizing the gangue of step 2 to assemble in place surrounding and become border dike 1, the height of border dike 1 is 100cm, top width 60cm, limit
The slope gradient is 1:1, and the gangue basal layer 5 that bottom laying depth is 50cm in the region that border dike 1 surrounds, at bastard coal ground mass
Filling the dewatered sludge 4 of step 1 on plinth layer 5, the thickness of the dewatered sludge 4 of laying is 50cm, then uses layering alternately to lay
Method, dewatered sludge and gangue are spaced and lay, i.e. gangue-dewatered sludge-gangue, dewatered sludge 4 is filled in
In gangue wall 2, the thickness of gangue wall is 30cm, and gangue used is the coal gangue particle of 10cm.Last layer
Border dike 1 the dewatered sludge layer top of next layer build, the physical dimension of each layer border dike 1 is identical, the bottom of upper strata border dike 1 away from
The height at the top of lower floor's border dike 1 is 20cm.In order to improve the stability constructing upper strata border dike on sludge blanket, at upper strata border dike
It is 40cm that the bottom of 1 is provided with the width constructed with gangue, and height is the supporter 3 of 60cm.
Through test, after using this mud-gangue landfill process that the dewatered sludge of moisture content 75 ~ 85% is filled,
Calm, descend without rain meteorological condition, ambient temperature 20 ~ 25 DEG C, after standing 72 hours, the superiors' moisture percentage in sewage sludge can be down to 58 ~
62%, orlop moisture percentage in sewage sludge can be down to 60 ~ 63%.
Embodiment 2
The landfill process test altogether of mud-gangue is carried out in dewatered sludge landfill field, Jincheng City, Shanxi Province.
A kind of dewatered sludge-gangue landfill process altogether, comprises the following steps:
Step 1: the dewatered sludge that Jincheng City sewage treatment plant moisture content is 75% is poured in blender, in blender
Adding drying agent, described drying agent uses the mixture of flyash and quick lime, adds fashionable according to, dewatered sludge: flyash:
The volume ratio of quick lime=80:15:5, opens blender, the rotating speed of blender is adjusted to middling speed, and 60～100r/min, stirring
20min, draws off the dewatered sludge mixture being stirred from blender, naturally dries 30min, make the moisture content of dewatered sludge
It is reduced to 65%.
Step 2: gangue Shanxi Jincheng Anthracite Mining Industry Group Co., Ltd. drawn passes through crusher in crushing
And sieve, make gangue become single-size that granularity is 5 ~ 10mm；
Step 3: select land in gully as landfill place, use gully type Sludge landfill technique, as in figure 2 it is shown, first exist
Repair in place cheuch bottom width be 150cm, grade of side slope be the Trapezoidal cheuch of 1:1, equal with side slope 5 in ditch valley portions
The gangue basal layer 5 of even laying depth 40cm, fills the dewatered sludge 4 of step 1 on gangue basal layer 5, lays dehydration
Mud 4 thickness is 50cm, uses the method that layering is alternately laid, and dewatered sludge 4 and gangue is spaced and lays, is i.e. dehydrated dirt
Mud-gangue-dewatered sludge, fills dewatered sludge 4 in gangue wall 2.The coal of wherein said gangue wall
Spoil thickness is 20cm, and the granularity of gangue is 5mm.
Through test, after using this gully type Sludge landfill technique that the dewatered sludge of moisture content 75 ~ 85% is filled,
Calm, descend without rain meteorological condition, ambient temperature 20 ~ 25 DEG C, after standing 72 hours, the superiors' moisture percentage in sewage sludge can be down to 60 ~
65%, orlop moisture percentage in sewage sludge can be down to 62 ~ 68%.
Blender and disintegrating machine in above-described embodiment are blender, the disintegrating machine sold on market.
The landfill of the landfill of mud with gangue can be considered by the present invention, takes into account the landfill of mud and gangue,
Not only can solve the difficulty of Sludge landfill, and can promote effective utilization of barrow, the enforcement of the present invention can be for improving
Coal-producing area environmental quality, promote Sustainable Socioeconomic Development contribute share, and implement workable.
Above-described embodiment is only used for skilled artisan understands that the present invention, all is made within technical solution of the present invention
Any amendment, improvement or equivalent, should be included within the scope of the present invention.
Claims (5)
1. mud-gangue landfill process altogether, it is characterised in that comprise the following steps:
Step 1: the semi-oriented process of dewatered sludge, by sewage treatment plant's moisture content be 75～85% dewatered sludge pour blender into
In, blender adds drying agent, dewatered sludge with the volume ratio of drying agent is, dewatered sludge: drying agent=80:20 is opened
Open blender, the rotating speed of blender is adjusted to middling speed, stir 20min, by the dewatered sludge mixture that is stirred from blender
Draw off, naturally dry 30min, obtain the dewatered sludge that moisture content is 65～70%；
Step 2: gangue precrushing processes, by crusher in crushing and sieves gangue, makes gangue become granularity
It it is the single-size of 5 ~ 10mm；
Step 3: implement landfill process, first uses the coal gangue particle of step 2 to lay gangue basal layer in place, default ground,
On gangue basal layer, carry out dewatered sludge landfill again, then use the method that layering is alternately laid, the dehydration of step 1 is dirty
The coal gangue particle interval of mud and step 2 is laid, and by dewatered sludge landfill in the wall of gangue, utilizes the sky of gangue
Between buffer action, support the dewatered sludge of leather hard, make dewatered sludge obtain the time that secondary dries in gangue field
With space；
According to flat-bottomed land, the difference of land in gully in step 3, the heap-type that can burn sth to the ground Sludge landfill technique and gully type are dirty
Mud landfill process two kinds；
When filling physical features and being flat-bottomed land, use level land to play heap-type Sludge landfill technique, first utilize step 2 in place surrounding
Gangue assembles becomes border dike, and the height of border dike is 80～100cm, and top width 40～60cm, grade of side slope is 1:1, on limit
The gangue basal layer that bottom laying depth is 30～50cm in the region that dyke becomes, fills step on gangue basal layer
The dewatered sludge of 1, laying dewatered sludge thickness is 50～60cm, then uses the method that layering is alternately laid, by dewatered sludge
And gangue interval is laid, by dewatered sludge landfill in gangue wall；
When filling physical features and being land in gully, use gully type Sludge landfill technique, the most in the venue finishing cheuch bottom width
Be 120～150cm, grade of side slope be the Trapezoidal cheuch of 1:1, at ditch valley portions and the uniform laying depth of side slope 30～40cm
Gangue basal layer, on gangue basal layer fill step 1 dewatered sludge, lay dewatered sludge thickness be 50～
60cm, then uses the method that layering is alternately laid, and dewatered sludge and gangue is spaced and lays, by dewatered sludge landfill in coal
In spoil wall.
Mud-gangue the most according to claim 1 landfill process altogether, is characterized in that described drying agent is flyash and life
The mixture of Calx, flyash with the volume ratio of quick lime is, flyash: quick lime=15:5.
Mud-gangue the most according to claim 1 and 2 landfill process altogether, is characterized in that the bastard coal of gangue wall
Stone thickness is 20～30cm, and the granularity of gangue is 5～10mm.
Mud-gangue the most according to claim 1 landfill process altogether, is characterized in that heap-type Sludge landfill technique is played on level land
The border dike of middle last layer is built on the dewatered sludge layer top of next layer, and the physical dimension of each layer border dike is identical, upper strata border dike
The height at the top away from lower floor's border dike, the bottom is 20cm.
5., according to the landfill process altogether of the mud-gangue described in claim 1,2 or 4, it is characterized in that heap-type dehydration dirt is played on level land
In mud landfill process, bottom at upper strata border dike is provided with the width constructed with gangue is 30～40cm, and height is 50～60cm
Supporter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199340.6A CN104801530B (en) | 2015-04-24 | 2015-04-24 | Process for landfill of sludge and coal gangue together |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199340.6A CN104801530B (en) | 2015-04-24 | 2015-04-24 | Process for landfill of sludge and coal gangue together |
Publications (2)
| Publication Number | Publication Date |
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| CN104801530A CN104801530A (en) | 2015-07-29 |
| CN104801530B true CN104801530B (en) | 2017-01-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620407A (en) * | 2018-05-14 | 2018-10-09 | 镇江新区固废处置股份有限公司 | A kind of burying method for solid waste |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113186944A (en) * | 2021-04-02 | 2021-07-30 | 山西晟境环保科技有限责任公司 | Novel process for standardized disposal of coal gangue |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7897831B2 (en) * | 2007-08-03 | 2011-03-01 | Remedial Construction Services, Lp | Method for solidifying high moisture sludge, solidified sludge therefrom |
| CN201358205Y (en) * | 2009-02-19 | 2009-12-09 | 上海市政工程设计研究总院 | Dehydrated mud burying device |
| CN102319713A (en) * | 2011-06-02 | 2012-01-18 | 福建工程学院 | The burying method that mixes health rubbish |
| CN202201785U (en) * | 2011-09-13 | 2012-04-25 | 北京高能时代环境技术股份有限公司 | Safety landfill site for sludge immobilization |
| CN103613256B (en) * | 2013-11-28 | 2016-01-06 | 上海老港废弃物处置有限公司 | A kind of blended landfill method of dewatered sludge and house refuse |
| CN103880262A (en) * | 2014-03-27 | 2014-06-25 | 常州大学 | Ecological sludge disposal bed |
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2015
- 2015-04-24 CN CN201510199340.6A patent/CN104801530B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620407A (en) * | 2018-05-14 | 2018-10-09 | 镇江新区固废处置股份有限公司 | A kind of burying method for solid waste |
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