CN104801530A - 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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- CN104801530A CN104801530A CN201510199340.6A CN201510199340A CN104801530A CN 104801530 A CN104801530 A CN 104801530A CN 201510199340 A CN201510199340 A CN 201510199340A CN 104801530 A CN104801530 A CN 104801530A
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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, the mud that sewage treatment plant produces constantly increases.The final outlet of mud is the huge difficult problem that sewage treatment plant faces at present.Mud can not properly be disposed, and is huge to the harm of environment.Because the moisture content of conventional sewage plants mud reaches about 80%, after entering common household refuse landfill sites, can cause rolling difficulty, thus refuse landfill Sewage Plant dewatered sludge of not taking like a shot enters.
Gangue is the solid waste discharged in coal-producing area coal mining process and coal washing process, be a kind of lower with a kind of phosphorus content of coal seam association in coalification course, containing sulfide and the black gray expandable rock harder than coal.China often on average produces 100,000,000 tons of coals, discharge spoil about about 1,400 ten thousand tons; From coal preparation, every washing 100,000,000 tons of coking coal discharge spoil amounts about 2,000 ten thousand tons, often wash 100,000,000 tons of thermal coals, discharge spoil amount about 15,000,000 tons.Thus, nearly more than 1500 seats of the whole nation existing hillock in colliery, accumulating amount more than 3,000,000,000 tons (accounting for more than 40% of Chinese industrial solid waste total emission volumn), take up an area 1.3 ten thousand hectares, and with the speed increase of annual about 100,000,000 tons, form newly-increased occupation of land more than 400 hectare, become China's cumulative stock and taken up an area maximum industrial wastes.And the disposal options of the current gangue in the whole nation only stores up the mode of disposal, a large amount of stackings of gangue, not only cover soil, more seriously have a strong impact on ecological environment.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of mud-gangue landfill process altogether, and landfill while achieving dewatered sludge and gangue, not only can solve the difficulty of dewatered sludge landfill, and can promote that gangue effectively utilizes.
Technical scheme of the present invention: a kind of mud-gangue is 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 in mixer, in mixer, add drying agent again, the volume ratio of dewatered sludge and drying agent is, dewatered sludge: drying agent=80:20, open mixer, the rotating speed of mixer is adjusted to middling speed, stirs 20min, the dewatered sludge mixture be stirred is drawn off from mixer, naturally dry 30min, obtain the dewatered sludge that moisture content is 65 ~ 70%;
Step 2: gangue precrushing process, is sieved gangue by crusher in crushing, gangue is become single-size that granularity is 5 ~ 10mm;
Step 3: implement landfill process, in place, default ground, first adopt the coal gangue particle of step 2 to lay gangue basal layer, dewatered sludge landfill is carried out again on gangue basal layer, then the method that layering is alternately laid is adopted, the coal gangue particle interval of the dewatered sludge of step 1 and step 2 is laid, by dewatered sludge landfill in the wall of gangue, utilize the space buffer action of gangue, support the dewatered sludge of leather hard, the time and space making dewatered sludge obtain secondary in gangue field to dry;
According to the difference of flat-bottomed land, land in gully in step 3, the heap-type that can burn sth to the ground Sludge landfill technique and gully type Sludge landfill technique two kinds;
When landfill physical features flat-bottomed land, level land is adopted to play heap-type Sludge landfill technique, first utilize the gangue of step 2 to assemble in place surrounding and become border dike, the height of border dike is 80 ~ 100cm, top width 40 ~ 60cm, grade of side slope is 1:1, bottom laying depth in the region that border dike surrounds is the gangue basal layer of 30 ~ 50cm, the dewatered sludge of landfill step 1 on gangue basal layer, laying dewatered sludge thickness is 50 ~ 60cm, then adopt the method that layering is alternately laid, dewatered sludge and gangue interval are laid, by dewatered sludge landfill in gangue wall.The border dike of last layer is built on the dewatered sludge layer top of lower one deck, and the physical dimension of each layer border dike is identical, and the height at the top of the bottom distance lower floor border dike of upper strata border dike is 20cm.Being provided with the width constructed with gangue in the bottom of upper strata border dike is 30 ~ 40cm, is highly the supporter of 50 ~ 60cm.
When landfill physical features land in gully, adopt gully type Sludge landfill technique, first repair the Trapezoidal cheuch that cheuch bottom width is 120 ~ 150cm, grade of side slope is 1:1 in the venue, at the gangue basal layer of ditch valley portions and the even laying depth 30 ~ 40cm of side slope, the dewatered sludge of landfill step 1 on gangue basal layer, laying dewatered sludge thickness is 50 ~ 60cm, then adopt the method that layering is alternately laid, dewatered sludge and gangue interval are laid, by dewatered sludge landfill in gangue wall.
Described drying agent is the mixture of flyash and quick lime, and the volume ratio of flyash and quick lime is, flyash: quick lime=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 following beneficial effect:
1, the landfill of dewatered sludge and the landfill of gangue are considered, taken into account the handling problems of dewatered sludge and gangue, not only can solve the difficulty of dewatered sludge landfill, and effective utilization of gangue can be promoted.
2, by the laying of gangue, border dike and bastard coal rock layers are connected as a single entity, improve the mechanical stability that gangue constructs body.
3, the basal layer utilizing gangue to assemble, wall, border dike, being surrounded by dewatered sludge is closed in wherein, on the one hand stable curing effect is served to dewatered sludge, make use of the space buffer action of gangue on the other hand, support the dewatered sludge of leather hard, the time and space making dewatered sludge have secondary in barrow to dry.
4, gangue is in stacking process, and the calorific value of himself can cause spontaneous combustion to a certain degree, and the heat that this Spontaneous firing effect produces can play the effect of oven dry to dewatered sludge, accelerate the mummification of dewatered sludge.
5, enforcement of the present invention can improve coal-producing area environmental quality, promotes that Sustainable Socioeconomic Development is contributed share, and workable, is convenient 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 understand the present invention better, below in conjunction with Figure of description, the present invention is further illustrated.
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 being 85% by Jincheng City sewage treatment plant moisture content is poured in mixer, drying agent is added again in mixer, described drying agent adopts the mixture of flyash and quick lime, add fashionable according to, dewatered sludge: flyash: the volume ratio of quick lime=80:15:5, open mixer, the rotating speed of mixer is adjusted to middling speed, 60 ~ 100r/min, stir 20min, the dewatered sludge mixture be stirred is drawn off from mixer, naturally dries 30min, make the moisture content of dewatered sludge be reduced to 70%.
Step 2: Shanxi Jincheng Anthracite Mining Industry Group Co., Ltd. drawn the gangue come to be sieved by crusher in crushing, gangue become single-size that granularity is 5 ~ 10mm;
Step 3: select flat-bottomed land as landfill place, level land is adopted to play heap-type Sludge landfill technique, as shown in Figure 1, first utilize 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, grade of side slope is 1:1, bottom laying depth in the region that border dike 1 surrounds is the gangue basal layer 5 of 50cm, the dewatered sludge 4 of landfill step 1 on gangue basal layer 5, the thickness of the dewatered sludge 4 laid is 50cm, then adopt the method that layering is alternately laid, dewatered sludge and gangue interval are laid, i.e. gangue-dewatered sludge-gangue, by dewatered sludge 4 landfill in gangue wall 2, the thickness of gangue wall is 30cm, gangue used is the coal gangue particle of 10cm.The border dike 1 of last layer is built on the dewatered sludge layer top of lower one deck, and the physical dimension of each layer border dike 1 is identical, and the height at the top of the bottom distance lower floor border dike 1 of upper strata border dike 1 is 20cm.In order to improve the stability of constructing upper strata border dike on sludge blanket, being provided with the width constructed with gangue in the bottom of upper strata border dike 1 is 40cm, is highly the supporter 3 of 60cm.
Through test, after adopting this mud-gangue landfill process to carry out landfill to the dewatered sludge of moisture content 75 ~ 85%, calm, without under rain meteorological condition, environment temperature 20 ~ 25 DEG C, leave standstill after 72 hours, the superiors' moisture percentage in sewage sludge can be down to 58 ~ 62%, and 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 being 75% by Jincheng City sewage treatment plant moisture content is poured in mixer, drying agent is added again in mixer, described drying agent adopts the mixture of flyash and quick lime, add fashionable according to, dewatered sludge: flyash: the volume ratio of quick lime=80:15:5, open mixer, the rotating speed of mixer is adjusted to middling speed, 60 ~ 100r/min, stir 20min, the dewatered sludge mixture be stirred is drawn off from mixer, naturally dries 30min, make the moisture content of dewatered sludge be reduced to 65%.
Step 2: Shanxi Jincheng Anthracite Mining Industry Group Co., Ltd. drawn the gangue come to be sieved by crusher in crushing, gangue become single-size that granularity is 5 ~ 10mm;
Step 3: select land in gully as landfill place, adopt gully type Sludge landfill technique, as shown in Figure 2, first repairing cheuch bottom width is in the venue 150cm, grade of side slope is the Trapezoidal cheuch of 1:1, at the gangue basal layer 5 of the even laying depth 40cm of ditch valley portions and side slope 5, the dewatered sludge 4 of landfill step 1 on gangue basal layer 5, laying dewatered sludge 4 thickness is 50cm, adopt the method that layering is alternately laid, dewatered sludge 4 and gangue interval are laid, i.e. dewatered sludge-gangue-dewatered sludge, by dewatered sludge 4 landfill in gangue wall 2.The gangue thickness of wherein said gangue wall is 20cm, and the granularity of gangue is 5mm.
Through test, after adopting this gully type Sludge landfill technique to carry out landfill to the dewatered sludge of moisture content 75 ~ 85%, calm, without under rain meteorological condition, environment temperature 20 ~ 25 DEG C, leave standstill after 72 hours, the superiors' moisture percentage in sewage sludge can be down to 60 ~ 65%, and orlop moisture percentage in sewage sludge can be down to 62 ~ 68%.
Mixer in above-described embodiment and disintegrating machine are mixer, disintegrating machine that market is sold.
The landfill of the landfill of mud and gangue can consider by the present invention, take into account the landfill of mud and gangue, not only can solve the difficulty of Sludge landfill, and effective utilization of barrow can be promoted, enforcement of the present invention can for improving coal-producing area environmental quality, promote that Sustainable Socioeconomic Development is contributed share, and enforcement is workable.
Above-described embodiment only understands the present invention for those skilled in the art, all any amendment, the improvement done within technical solution of the present invention or equivalent to replace, and all should be included within protection scope of the present invention.
Claims (5)
1. mud-gangue landfill process altogether, is characterized in that comprising 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 in mixer, in mixer, add drying agent again, the volume ratio of dewatered sludge and drying agent is, dewatered sludge: drying agent=80:20, open mixer, the rotating speed of mixer is adjusted to middling speed, stirs 20min, the dewatered sludge mixture be stirred is drawn off from mixer, naturally dry 30min, obtain the dewatered sludge that moisture content is 65 ~ 70%;
Step 2: gangue precrushing process, is sieved gangue by crusher in crushing, gangue is become single-size that granularity is 5 ~ 10mm;
Step 3: implement landfill process, in place, default ground, first adopt the coal gangue particle of step 2 to lay gangue basal layer, dewatered sludge landfill is carried out again on gangue basal layer, then the method that layering is alternately laid is adopted, the coal gangue particle interval of the dewatered sludge of step 1 and step 2 is laid, by dewatered sludge landfill in the wall of gangue, utilize the space buffer action of gangue, support the dewatered sludge of leather hard, the time and space making dewatered sludge obtain secondary in gangue field to dry;
According to the difference of flat-bottomed land, land in gully in step 3, the heap-type that can burn sth to the ground Sludge landfill technique and gully type Sludge landfill technique two kinds;
When landfill physical features flat-bottomed land, level land is adopted to play heap-type Sludge landfill technique, first utilize the gangue of step 2 to assemble in place surrounding and become border dike, the height of border dike is 80 ~ 100cm, top width 40 ~ 60cm, grade of side slope is 1:1, bottom laying depth in the region that border dike surrounds is the gangue basal layer of 30 ~ 50cm, the dewatered sludge of landfill step 1 on gangue basal layer, laying dewatered sludge thickness is 50 ~ 60cm, then adopt the method that layering is alternately laid, dewatered sludge and gangue interval are laid, by dewatered sludge landfill in gangue wall,
When landfill physical features land in gully, adopt gully type Sludge landfill technique, first repair the Trapezoidal cheuch that cheuch bottom width is 120 ~ 150cm, grade of side slope is 1:1 in the venue, at the gangue basal layer of ditch valley portions and the even laying depth 30 ~ 40cm of side slope, the dewatered sludge of landfill step 1 on gangue basal layer, laying dewatered sludge thickness is 50 ~ 60cm, then adopt the method that layering is alternately laid, dewatered sludge and gangue interval are laid, by dewatered sludge landfill in gangue wall.
2. mud-gangue according to claim 1 landfill process altogether, it is characterized in that described drying agent is the mixture of flyash and quick lime, the volume ratio of flyash and quick lime is, flyash: quick lime=15:5.
3. mud-gangue according to claim 1 and 2 landfill process altogether, it is characterized in that the gangue thickness of gangue wall is 20 ~ 30cm, the granularity of gangue is 5 ~ 10mm.
4. mud-gangue according to claim 1 landfill process altogether, it is characterized in that the border dike that last layer in heap-type Sludge landfill technique is played on level land is built on the dewatered sludge layer top of lower one deck, the physical dimension of each layer border dike is identical, and the height at the top of the bottom distance lower floor border dike of upper strata border dike is 20cm.
5. the altogether landfill process of the mud-gangue according to claim 1,2 or 4, it is characterized in that level land plays that to be provided with the width constructed with gangue in the bottom of upper strata border dike in heap-type dewatered sludge landfill technique be 30 ~ 40cm, is highly the supporter of 50 ~ 60cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510199340.6A CN104801530B (en) | 2015-04-24 | 2015-04-24 | Process for landfill of sludge and coal gangue together |
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| CN201510199340.6A CN104801530B (en) | 2015-04-24 | 2015-04-24 | Process for landfill of sludge and coal gangue together |
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| CN104801530B CN104801530B (en) | 2017-01-11 |
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Cited By (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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108620407B (en) * | 2018-05-14 | 2019-12-31 | 镇江新区固废处置股份有限公司 | Landfill method for solid waste |
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| US20090036728A1 (en) * | 2007-08-03 | 2009-02-05 | 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 |
| CN103613256A (en) * | 2013-11-28 | 2014-03-05 | 上海老港废弃物处置有限公司 | Mixed embedding method of dried sludge and household garbage |
| CN103880262A (en) * | 2014-03-27 | 2014-06-25 | 常州大学 | Ecological sludge disposal bed |
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- 2015-04-24 CN CN201510199340.6A patent/CN104801530B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090036728A1 (en) * | 2007-08-03 | 2009-02-05 | 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 |
| CN103613256A (en) * | 2013-11-28 | 2014-03-05 | 上海老港废弃物处置有限公司 | Mixed embedding method of dried sludge and household garbage |
| CN103880262A (en) * | 2014-03-27 | 2014-06-25 | 常州大学 | Ecological sludge disposal bed |
Cited By (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 |
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