CN107652996A - A kind of method washed and dry coal - Google Patents
A kind of method washed and dry coal Download PDFInfo
- Publication number
- CN107652996A CN107652996A CN201710648191.6A CN201710648191A CN107652996A CN 107652996 A CN107652996 A CN 107652996A CN 201710648191 A CN201710648191 A CN 201710648191A CN 107652996 A CN107652996 A CN 107652996A
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- Prior art keywords
- coal
- washing
- clean
- raw
- raw coal
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
Abstract
The present invention relates to a kind of method washed and dry coal, belong to coal cleaning process technical field.The step of present invention is by destructive distillation, washing, drying, by the raw coal of low-quality by processing, obtains high-quality washing cleaned coal.After the present invention uses raw coal destructive distillation, dirt band is set to be separated with Filter Tuber For Clean Coal, again by washing and drying, the content of ashes in Filter Tuber For Clean Coal is substantially reduced, and the content of water in Filter Tuber For Clean Coal is reached 20% or so, and 4 dryers will be used originally, annual about 24000 tons of raw coal of consumption, it is reduced to and uses 1 dryer, it is annual to consume about 6000 tons of raw coal, save 18000 tons of raw coal than original split type oven drying method.
Description
Technical field
The invention belongs to coal cleaning process technical field, specifically, is related to a kind of method washed and dry coal.
Background technology
Clean coal technology is to using in overall process in coal exploitation, it is intended to reduces disposal of pollutants with improving utilization ratio
The general name of the new technologies such as Coal dressing, burning, conversion.Coal occupy strategic position for a long time in China's energy resource structure, is China
The important guarantee of energy security.
Existing mill coat, purchase requirement standard is higher, because the raw coal that ash is higher, coal seam turns into one with dirt band
It body, can not separate, and no matter how wash raw coal, the clean ash content of coal burnt is still especially high, typically all 11% or so, institute
It can only typically select the best raw coal of quality with factory, and the raw coal of quality better, price is high, is not easy to purchase.
The mode of existing processing raw coal is washing, after washing, can cause to contain substantial amounts of moisture in coal again.
In order to reduce the moisture of Filter Tuber For Clean Coal, using traditional split oven drying method, Filter Tuber For Clean Coal is dried.By per born
The Filter Tuber For Clean Coal of 80 tons of production calculates, and 4 dryers consume 50000 cubes of coal gas daily, equivalent to 80 tons of raw coal of consumption, this side
Formula is obviously uneconomical.
This is due to just to burn the Filter Tuber For Clean Coal come during being oven-dried, and can bring one layer of fine coal slurry, this layer of fine coal slurry
One protective effect is served to the moisture of Filter Tuber For Clean Coal, even if consuming 50000 cubes of coal gas, the moisture of Filter Tuber For Clean Coal still exists
Between 23%-24%, desired value 20% is not reached.The Filter Tuber For Clean Coal after washing is resulted in, quantity of heat production, which does not reach, after washing wants
Ask.
And serious environmental pollution can be then brought without using the raw coal of washing, in the situation that environmental protection is increasingly severe
Under, it is the important channel improved China's energy efficiency, reduced environmental pollution to develop clean coal technology.
Therefore, it is necessary to propose a kind of new furnace drying method, the ash content in raw coal can be reduced, and can is by after washing
Clean coal moisture control improves the quality of Filter Tuber For Clean Coal 20% or so.
The content of the invention
The problem of in order to overcome in background technology, the present invention propose a kind of method washed and dry coal, and it is first by original
Coal is sent into low temperature distillation side's stove destructive distillation processing, extracts the fugitive constituent in raw coal, and folder drystone is separated with clean coal spontaneous.Promote
Make the Filter Tuber For Clean Coal after washing process, remove the fine coal slurry of appearance, the moisture content after drying has been reached expectation content value.
To achieve these goals, the present invention is realized according to following technical scheme：
A kind of method washed and dry coal,
It comprises the following steps：
(1) destructive distillation
A. according to 260 tons of the day output of low temperature distillation side's stove, a certain amount of raw coal is purchased；
B. according to the specification of low temperature distillation side's stove, low temperature distillation side's stove single treatment amount is determined, and send by belt conveyor
Enter destructive distillation in low temperature distillation side's stove, control low temperature distillation side's stove internal upper part temperature is maintained at 300-400 degree, and middle portion temperature is maintained at
500-600 degree, retorting time maintain 8h, remove most of fugitive constituent in raw coal, and fugitive constituent is collected, and are used；
The fugitive constituent in raw coal is extracted in the process, and because coal seam can shrink, and press from both sides drystone and be difficult
Shrink, folder drystone is separated with clean coal spontaneous；
C. the raw coal after the destructive distillation in step b is taken out out of low temperature distillation side stove, until raw coal is cooled to room temperature, then
Etc. pending；
(2) is washed
A. by the pending raw coal of the cooling in (1) step c, it is sent into coal washer and is washed by belt conveyor；
B. under the percussion of current, the gap between dirt band and Filter Tuber For Clean Coal is widened, and the density in coal seam is remote
Less than the density of folder drystone, therefore coal seam can be swum on the water surface, and is pressed from both sides drystone and then sunk to coal washing motor spindle；
Coal washer is gone out in coal seam with current, is sent on Elevated belt and dried by belt conveyor, and folder drystone, which is deposited in, to be washed
Coal motor spindle, pulled out with bucket is dragged for；
(3) is dried
The coal dried on (2) water-washing step b Elevated belts is sent into the drying oven that day output is 800 tons and dried, often
12000 cubic metres of its gas consumption (equivalent to 20 tons raw coal).
(4) is detected
Fugitive constituent, moisture detection are carried out to the Filter Tuber For Clean Coal after drying, measures clean pit ash, content 8% with
In lower scope, high-quality clean coal is made in coal of the moisture below 20% in scope, taking-up.
Further, raw coal is after coal washer coal washing processing in step b in described (2) water-washing process, with conveying skin
With being sent on long 100 meters Elevated belt, with dump car discharging, directly drying in one line.
Beneficial effects of the present invention：
1st, the dirt band in raw coal has been washed away, so as to reduce clean pit ash after washing, has made Filter Tuber For Clean Coal after washing
Content of ashes control is the buying of raw coal and is that factory's control cost brings facility 8% or so.
2nd, rapid integrated drying is carried out with dryer, saves 60 tons of raw coal than traditional type oven drying method, and can guarantee that cleaning
Moisture control improves the quantity of heat production after clean coal combustion 20% or so in coal.
3rd, 4 dryers will be used originally, it is annual to consume 24000 tons of raw coal, it is reduced to and is consumed every year using 1 dryer
6000 tons of raw coal, 18000 tons of raw coal is saved than original split type oven drying method.
Embodiment
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, clear, below to the preferred of the present invention
Embodiment is described in detail, to facilitate the technical staff to understand.
Embodiment 1
A kind of method washed and dry coal, it comprises the following steps：
(1) originals coal carbonization
A. to ensure continuous production, according to 260 tons of the day output of low temperature distillation side's stove, buying raw coal amount is at least 3 days
Raw coal storage level；
B. raw coal is sent into low temperature distillation side's stove, and destructive distillation in low temperature distillation side's stove is sent into by belt conveyor, kept low
Warm carbonization kiln internal upper part temperature is maintained at 300 degree of -400 degree, and middle portion temperature is maintained at 500 degree of -600 degree, and retorting time maintains
In 8h, most of fugitive constituent in raw coal is removed, and is collected fugitive constituent by water-cooled purifying system and electrically recovery, is subject to profit
With；
The fugitive constituent in raw coal is extracted in the process, and because coal seam can shrink, and press from both sides drystone and be difficult
Shrink, make folder drystone and Filter Tuber For Clean Coal cracked；
C. by the raw coal after the destructive distillation in step b, scraped using scrapper conveyor out of low temperature distillation side stove, until raw coal cools down
It is then etc. pending to room temperature；
Experiment 1
Using the identical place of production, the raw coal of identical weight, destructive distillation in low temperature distillation side's stove is sent into, makes low temperature distillation side's stove respectively
Upper temp is maintained at 300 degree, 350 degree, 400 degree, 450 degree, middle portion temperature control 500 degree, 550 degree, 600 degree, 650 degree,
700 degree of scope retorting time controls are less than 8 hours, destructive distillation under more than 8 hours two kinds of situations, after destructive distillation out of low temperature distillation side stove
Take out, the experimental facilities being respectively adopted in laboratory is chemically examined, and obtaining experimental result is：
1. in the case where furnace temperature is constant, if retorting time increases, grey branch is suitably more higher, high by 0.2% or so
Influence little.
2. furnace temperature gradually rises, in the case of retorting time is constant, grey branch is more higher, but increase is little, to destructive distillation
As a result influence little.
(2) washing of raw coal
A. by raw coal pending after the cooling in (1) step c, it is sent into coal washer and is washed by belt conveyor, is passed through
Certain air quantity and water coal washing (air quantity and water can be all calculated by existing computational chart), treat that fine coal slurry is washed off；
Under the percussion of current, the gap between dirt band and Filter Tuber For Clean Coal is widened, and the density in coal seam is far small
In the density of folder drystone, therefore coal seam can be swum on the water surface, and is pressed from both sides drystone and then sunk to coal washing motor spindle；
B. coal washer is gone out with current in coal seam, by belt conveyor, is sent into Elevated belt, and material is separated with dump car
Dried, folder drystone is deposited in coal washing motor spindle, is pulled out with bucket is dragged for.
(3) drying of Filter Tuber For Clean Coals
The coal dried on (2) water-washing step b Elevated belts is sent into the drying oven that a day output is 800 tons and dried
It is dry, daily 12000 cubic metres of gas consumption, equivalent to 20 tons raw coal.Elevated belt have discharge it is more, do not account for place, the spy managed well
Point.
(4), the detection of clean ash content of coal
Volatile content detection is carried out to the Filter Tuber For Clean Coal after drying, measures content of ashes scope below 8% of Filter Tuber For Clean Coal,
Moisture water content is less than 20% coal, and high-quality Filter Tuber For Clean Coal is made.
Experiment 1
The raw coal for choosing different geographical carries out grouping experiment, using method in embodiment 1, is tested, and utilizes experiment
The equipment of room is chemically examined, and the content of ashes for testing Filter Tuber For Clean Coal is 8% -9%, and water content detection content is 18% -20%.
Embodiment 2
(1) washing of raw coal
A. to ensure continuous production, according to 260 tons of the day output of dryer, the raw coal that raw coal amount is at least 3 days is purchased
Storage level.
B. raw coal is delivered in coal washer by conveyer belt and washed, be washed to coal seam and separated with drystone, be passed through certain
Air quantity and water coal washing (air quantity and water can be all calculated by existing computational chart), stop washing；
C. the Filter Tuber For Clean Coal after washing is taken out out of coal washer, is delivered on Elevated belt and dried with belt conveyor, to moisture
Evaporation is complete, pending
(2) cleanings coal carbonization
A. the pending Filter Tuber For Clean Coal in the water-washing step c of (1) raw coal is sent into low temperature distillation side's stove by belt conveyor；
B. middle portion temperature 500-600 degree in holding low temperature distillation side's stove, upper temp 300-400 degree, processing time 8h,
The fugitive constituent in coal seam is removed, and is collected fugitive constituent using device, is used；
C. by the Filter Tuber For Clean Coal in step b, taken out with scrapper conveyor out of low temperature distillation side stove, treat that it is cooled to room temperature, wait to locate
Reason；
(3) drying of Filter Tuber For Clean Coals
Due to the presence of fine coal slurry, the coal after above-mentioned destructive distillation is sent into 4 dryers and dried, a drying need to consume raw coal
80 tons, 50000 cubic metres of gas consumption.
(4) detection of ash content
Volatile content detection is carried out to the Filter Tuber For Clean Coal after drying, measures the content of ashes of Filter Tuber For Clean Coal in 11%-12% models
In enclosing, Filter Tuber For Clean Coal is made in the raw coal of 22%-23% scopes in moisture.
Experiment 2
Using the raw coal of same embodiment 1, raw coal is handled using the processing mode of embodiment 2, and utilize the chemical examination of embodiment 1
Equipment, obtain content of ashes 11% -12%, the moisture 22% -24% of Filter Tuber For Clean Coal.
In summary：Embodiment 2 uses 4 drying machine dryings, and what 4 dryers were handled is not washed Filter Tuber For Clean Coal, on
Bread has coal slime, and coal consumption is big, is unfavorable for drying.
The processing of embodiment 1 is the Filter Tuber For Clean Coal for disposing coal slime, and with a drying machine drying, coal consumption is small, is also easier to
Drying.
Test effect：
From the high-quality low ash in Factory, Shenmu, Shanxi area, low-sulfur, low-phosphorous, the bituminous coal of golf calorific value is raw material, by washing, proposition
Spoil in coal, the impurity in coal is reduced, after being handled by destructive distillation, by carbon monoxide highly unwanted to human body in bituminous coal, virtue
Hydrocarbon, PAH, polycyclic aromatic hydrocarbon, benzene, naphthalene material, are reclaimed by advanced production equipment, and extraction turns into former needed for other industrial productions
Material.
Obtained high fixed carbon, high heating value, the novel cleaning clean coal of low-volatile, possesses anthracitic good characteristic, again
Combustion characteristics with bituminous coal.Smokeless Filter Tuber For Clean Coal calorific value is higher by 30% -50% than common coal after tested, nontoxic, nothing during burning
Taste, without black smoke, smoke discharge amount reduces 90%.Smokeless clean igniting coal, it is a moisture≤20%, ash content ＜ 10%, volatilization
Part ＜ 10%, sulphur ＜ 0.39, fixed carbon ＞ 59%, a kind of kilocalories of caloric value ＞ 5500/more than KG coal.After it lights 8 minutes
Other coals can be added, burning time, using vacuum packaging, without any residue, burning-point was on 400 DEG C of left sides at 40 minutes or so
The right side, convenient use and storing and transporting security.
Finally illustrate, described above is the preferred embodiment of the present invention, although by above preferred embodiment,
Through the present invention is described in detail, it is to be understood by those skilled in the art that can be in the form and details to it
It is variously modified, without departing from the scope required by claims of the present invention.
Claims (4)
- A kind of 1. method washed and dry coal, it is characterised in that：Comprise the following steps：(1) destructive distillationA. according to low temperature distillation side's stove day output, a certain amount of raw coal is purchased；B. the raw coal in step a is sent into destructive distillation in low temperature distillation side's stove, removes the fugitive constituent in raw coal, and collect fugitive constituent, It is used；C. the raw coal after the destructive distillation in step b is taken out out of low temperature distillation side stove, cooling is pending；(2) is washedA. by the raw coal after the processing in (1) step c, by carrying out coal washing in Belt Conveying to coal washer；B. the coal after washing process goes out coal washer with current, is sent on Elevated belt and dried by belt conveyor, presss from both sides drystone Coal washing motor spindle is deposited in, is pulled out with bucket is dragged for；(3) is driedFilter Tuber For Clean Coal after (2) step b drying is sent into dryer and dried；(4) is detectedFilter Tuber For Clean Coal after drying, below 8%, coal of the moisture below 20%, taking-up is made detection content of ashes High-quality clean coal.
- A kind of 2. method washed and dry coal according to claim 1, it is characterised in that：Described (1) retorting step b Middle to control low temperature distillation side's stove internal upper part temperature be 300-400 degree, and middle portion temperature is 500-600 degree.
- A kind of 3. method washed and dry coal according to claim 1, it is characterised in that：Described low temperature distillation side's stove Day output be 260 tons.
- A kind of 4. method for washing drying coal according to claim 1, it is characterised in that：In described (2) water-washing process Raw coal is sent on long 100 meters Elevated belt with belt conveyor after coal washer coal washing processing, uses dump car in step b Discharging, it is in one line directly to dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710648191.6A CN107652996A (en) | 2017-08-01 | 2017-08-01 | A kind of method washed and dry coal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710648191.6A CN107652996A (en) | 2017-08-01 | 2017-08-01 | A kind of method washed and dry coal |
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| Publication Number | Publication Date |
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| CN107652996A true CN107652996A (en) | 2018-02-02 |
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| CN201710648191.6A Pending CN107652996A (en) | 2017-08-01 | 2017-08-01 | A kind of method washed and dry coal |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803599A (en) * | 2005-05-31 | 2006-07-19 | 株洲工学院科技开发部 | Process and apparatus for preparing high-purity silicon dioxide by utilizing rice hull |
| CN104528717A (en) * | 2015-02-01 | 2015-04-22 | 庄林生 | Preparation method of briquetted active carbon |
| CN105112079A (en) * | 2015-09-17 | 2015-12-02 | 湖南华银能源技术有限公司 | Coal quality-improving method free of waste water discharge |
-
2017
- 2017-08-01 CN CN201710648191.6A patent/CN107652996A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803599A (en) * | 2005-05-31 | 2006-07-19 | 株洲工学院科技开发部 | Process and apparatus for preparing high-purity silicon dioxide by utilizing rice hull |
| CN104528717A (en) * | 2015-02-01 | 2015-04-22 | 庄林生 | Preparation method of briquetted active carbon |
| CN105112079A (en) * | 2015-09-17 | 2015-12-02 | 湖南华银能源技术有限公司 | Coal quality-improving method free of waste water discharge |
Non-Patent Citations (1)
| Title |
|---|
| 石油工业部供应局: "《石油工业常用材料手册 第三册》", 31 March 1983, 石油工业出版社 * |
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Application publication date: 20180202 |