CN101564730A - Method for recycling sludge in coal washery and online direct recycling process - Google Patents
Method for recycling sludge in coal washery and online direct recycling process Download PDFInfo
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- CN101564730A CN101564730A CNA2009100519258A CN200910051925A CN101564730A CN 101564730 A CN101564730 A CN 101564730A CN A2009100519258 A CNA2009100519258 A CN A2009100519258A CN 200910051925 A CN200910051925 A CN 200910051925A CN 101564730 A CN101564730 A CN 101564730A
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Abstract
The invention discloses a method for recycling sludge in a coal washery and an online direct recycling process, belonging to the sludge recycling technology. The method comprises the following steps of mixing the materials such as washed coal, gangue, and the like in the sludge to churn up so as to be sufficiently mixed with the sludge, loosening the sludge pie and forming flowable loose blocks; simultaneously using the washed coal to absorb part of sludge water; drying the sludge before mixing or after mixing by stream or smoke so as to reduce the water of the sludge as much as possible. The method and the process have the beneficial effects that the sludge-coal mixed body treated by the process overcomes the difficulty of bonding, plugging, and the like during the warehousing, loading, unloading process of the sludge, can load, unload, store, transport and use the sludge like normal coal, thus leading the waste sludge to change into precious article, reducing the environmental pollution and improving the economic benefits of the coal washery.
Description
Technical field
The present invention relates to the coal slime recovery method, specifically is coal slime recovery method and online direct recovery technology in a kind of coal washery.
Background technology
Coal preparation plant's coal slime line in the coal separation process can produce a large amount of black waters, washes mixed coal, last cash line and produces a large amount of mixed coal, ends washed.Traditional coal slime reclaims technology: and black water → coal slime thickener concentrates → and coal slime filter-press dehydration → coal slime is discharged to the coal slime place outward.The moisture of coal slime is about 20-28% with the difference of filter press effect, the state of coal slime is sticking bulk, pasty state or glue, bring very big difficulty for storage, transportation and the utilization of coal slime, seriously restricted the utilization of coal slime, and serious environment pollution, at present the approach that generally utilizes is roughly: mix with other coal after the airing and join burning, or directly be pumped into boiler combustion by pipeline, or make water-coal-slurry.
Consider the recycling of coal slime and reduce pollution to environment, using more in recent years is with the coal slime oven dry, because the power consumption of this technology is high, efficient is low, and therefore the paces of applying are unhappy.
Summary of the invention
For solving the problems of the technologies described above, the invention provides coal slime recovery method and online direct recovery technology in a kind of coal washery.Solved the moisture height that exists in the coal slime removal process, viscosity is big, problem such as inconvenience is put in storage, loaded and unloaded, use.
The present invention adopts following technical scheme to realize: coal slime recovery method in a kind of coal washery, it is characterized in that black water is concentrated through thickener, thickener underflow is got coal slime after the filter press dehydration, stir by in coal slime, adding materials such as washing mixed coal end spoil then, do loose aggregate with the compound of washing mixed coal or last spoil or washing mixed coal end spoil, make it fully to mix, untie coal slime group, form flowable loose media with coal slime; Utilize simultaneously and wash mixed coal end spoil absorption portion coal slime moisture.
Can also be before blending coal slime dried or blending after mixture is dried to reduce the water content of final mixture.The water content of final mixture is controlled at below 13%.
The online direct recovery technology of coal slime in a kind of coal washery, its technological process is as follows: the coal slime line: black water is concentrated through thickener, and thickener underflow dewaters through filter press, and the coal slime after the dehydration is again through steam or the oven dry of flue gas drying machine; Wash mixed coal, last cash line: utilize disintegrating machine to wash mixed coal, last cash carries out fragmentation, makes it to reach below the granularity of regulation, reduces moisture simultaneously; With the coal slime of coal slime line and wash the mixed coal line wash mixed coal, last cash merges in proportion, uses " coal slime reclaims the continuous crushing mixer " to stir coal slime, wash mixed coal, last cash, forms coal slime-wash mixed coal mixture; The moisture that mixed coal absorbs a part of coal slime is washed in utilization, and makes it to have good mobility and caloric value.
The online direct recovery technology of coal slime in a kind of coal washery, its technological process is as follows: the coal slime line: black water is concentrated through thickener, and thickener underflow dewaters through filter press; Wash mixed coal, last cash line: utilize disintegrating machine to wash mixed coal, last cash carries out fragmentation, makes it to reach below the granularity of regulation, reduces moisture simultaneously; With the coal slime of coal slime line and wash the mixed coal line wash mixed coal, last cash merges in proportion, use " coal slime reclaims the continuous crushing mixer " to stir coal slime, wash mixed coal, last cash, form coal slime-wash mixed coal mixture, the moisture of part coal slime is washed mixed coal and is absorbed, again by steam or the oven dry of flue gas drying machine, the mixture total moisture is controlled at below 13%, and coal stores, loads and unloads, transports, uses routinely.
The invention has the beneficial effects as follows: the coal slime of coming out with said method and explained hereafter-wash mixed coal mixture, overcome the viscosity of coal slime, overall moisture declines to a great extent below 13%, has had laxity and flowability preferably, and coal stores, loads and unloads, transports, uses routinely.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the process chart of an embodiment of the online direct recovery technology of coal slime in the coal washery;
Fig. 2 is the process chart of an embodiment of the online direct recovery technology of coal slime in the coal washery.
The specific embodiment
Embodiment 1
As shown in Figure 1, this online direct recovery technology is that coal slime is dried back blending loose aggregate earlier.
The one, the coal slime line: black water concentrates through thickener, and thickener underflow dewaters through filter press, and through the steam drying machine oven dry, moisture is controlled at below the 15-18% coal slime after the dehydration again; The 2nd, wash mixed coal, last cash line: utilize disintegrating machine to wash mixed coal, last cash carries out fragmentation, make it to reach below the 10mm, the expection moisture below 6%; With the coal slime of coal slime line and wash the mixed coal line wash mixed coal, last cash merges in proportion, use " coal slime reclaims the continuous crushing mixer " to stir coal slime, wash mixed coal, last cash, form coal slime-wash mixed coal mixture, the moisture of part coal slime is washed mixed coal and is absorbed, overall moisture is controlled at below 13%, can directly put in storage, and transport outward by train or automobile as common coal.
The coal slime of producing under above technology-wash the mixed coal mixture has overcome the viscosity of coal slime, and overall moisture drops to greatly below 13%, has had laxity and flowability preferably, and coal stores, loads and unloads, transports, uses routinely.
Embodiment 2
As shown in Figure 2, this online direct recovery technology is that coal slime elder generation blending loose aggregate is dried again.
The one, the coal slime line: black water concentrates through thickener, and thickener underflow dewaters through filter press, moisture control 20-23%, and the coal slime after the dehydration is waited for and being stirred; The 2nd, wash mixed coal, last cash line: utilize disintegrating machine to wash mixed coal, last cash carries out fragmentation, make it to reach below the 10mm, the expection moisture below 6%; With the coal slime of coal slime line and wash the mixed coal line wash mixed coal, last cash merges in proportion, use " coal slime reclaims the continuous crushing mixer " to stir coal slime, wash mixed coal, last cash, form coal slime-wash mixed coal mixture, the moisture of part coal slime is washed mixed coal and is absorbed, again by steam or the oven dry of flue gas drying machine, total moisture is controlled at below 13%, and product can directly put in storage, and transports outward by train or automobile as common coal.
The coal slime of producing under above technology-wash the mixed coal mixture has overcome the viscosity of coal slime, and overall moisture drops to greatly below 13%, has had laxity and flowability preferably, and coal stores, loads and unloads, transports, uses routinely.
Claims (7)
1, coal slime recovery method in a kind of coal washery, it is characterized in that black water is concentrated through thickener, thickener underflow is got coal slime after the filter press dehydration, stir by in coal slime, adding materials such as washing mixed coal end spoil then, do loose aggregate with the compound of washing mixed coal or last spoil or washing mixed coal end spoil, make it fully to mix, untie coal slime group, form flowable loose media with coal slime; Utilize simultaneously and wash mixed coal end spoil absorption portion coal slime moisture.
2, coal slime recovery method in the coal washery according to claim 1, it is characterized in that can also be before blending coal slime dried or blending after mixture is dried to reduce the water content of final mixture.
3, coal slime recovery method in the coal washery according to claim 1 is characterized in that the water content of final mixture is controlled at below 13%.
4, the online direct recovery technology of coal slime in a kind of coal washery, its technological process is as follows: it is characterized in that: the coal slime line: black water is concentrated through thickener, and thickener underflow dewaters through filter press, and the coal slime after the dehydration is again through steam or the oven dry of flue gas drying machine; Wash mixed coal, last cash line: utilize disintegrating machine to wash mixed coal, last cash carries out fragmentation, makes it to reach below the granularity of regulation, reduces moisture simultaneously; With the coal slime of coal slime line and wash the mixed coal line wash mixed coal, last cash merges in proportion, uses " coal slime reclaims the continuous crushing mixer " to stir coal slime, wash mixed coal, last cash, forms coal slime-wash mixed coal mixture; The moisture that mixed coal absorbs a part of coal slime is washed in utilization, and makes it to have good mobility and caloric value.
5, the online direct recovery technology of coal slime in the coal washery according to claim 4 is characterized in that: described good mobility and caloric value are set according to power plant and general civil boiler instructions for use.
6, the online direct recovery technology of coal slime in a kind of coal washery, it is characterized in that: its technological process is as follows: the coal slime line: black water is concentrated through thickener, and thickener underflow dewaters through filter press; Wash mixed coal, last cash line: utilize disintegrating machine to wash mixed coal, last cash carries out fragmentation, makes it to reach below the granularity of regulation, reduces moisture simultaneously; With the coal slime of coal slime line and wash the mixed coal line wash mixed coal, last cash merges in proportion, use " coal slime reclaims the continuous crushing mixer " to stir coal slime, wash mixed coal, last cash, form coal slime-wash mixed coal mixture, the moisture of part coal slime is washed mixed coal and is absorbed, again by steam or the oven dry of flue gas drying machine, the mixture total moisture is controlled at below 13%, and coal stores, loads and unloads, transports, uses routinely.
7, according to the online direct recovery technology of coal slime in claim 4 or the 6 described coal washerys, it is characterized in that: the granularity of washing mixed coal, last cash of mixing is below 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100519258A CN101564730A (en) | 2009-05-25 | 2009-05-25 | Method for recycling sludge in coal washery and online direct recycling process |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100519258A CN101564730A (en) | 2009-05-25 | 2009-05-25 | Method for recycling sludge in coal washery and online direct recycling process |
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| CN101564730A true CN101564730A (en) | 2009-10-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654342A (en) * | 2015-01-28 | 2015-05-27 | 江苏西铭节能环保科技有限公司 | Coal blending combustion anti-blocking device and coal blending combustion method |
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2009
- 2009-05-25 CN CNA2009100519258A patent/CN101564730A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654342A (en) * | 2015-01-28 | 2015-05-27 | 江苏西铭节能环保科技有限公司 | Coal blending combustion anti-blocking device and coal blending combustion method |
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Open date: 20091028 |