CN204934007U - Dry separation and spoil utilization system before a kind of raw coal stove - Google Patents
Dry separation and spoil utilization system before a kind of raw coal stove Download PDFInfo
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- CN204934007U CN204934007U CN201520303839.2U CN201520303839U CN204934007U CN 204934007 U CN204934007 U CN 204934007U CN 201520303839 U CN201520303839 U CN 201520303839U CN 204934007 U CN204934007 U CN 204934007U
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Abstract
The utility model provides dry separation and spoil utilization system before a kind of raw coal stove, comprise in the efficient seperator of 50-6mm coal feeding ZM mineral that screening is obtained and carry out sorting, 0-6mm Bed for Fine Coal is sent in fine fraction dry method pulse swirl separator and is carried out sorting, and from the gangue that sorting obtains, isolate boiling coal and iron concentrate, iron concentrate is made to enter oxidizing roasting stove, reduction roaster, magnetic separator successively again, obtain iron ore concentrate and magnetic tailing, magnetic tailing is sent in leaching tanks, collect leachate to reclaim valuable metal.The wholegrain level that the utility model achieves raw coal is selected in, drastically increase raw coal utilization rate and coal-fired quality, and by using dry coal preparation device, reduce capital expenditure and operating cost, improve the caloric value of coal, the utility model also achieves and has high value-added product to the comprehensive utilization of gangue to produce simultaneously, and whole system produces without discarded object, safety and environmental protection.
Description
Technical field
The utility model relates to dry separation and spoil utilization system before a kind of raw coal stove, belongs to clean coal utilization technical field.
Technical background
Thermal power plant's generating set coal fired power generation can give off containing a large amount of SO
2the flue gas of gas, " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) specifies, general regional SO
2concentration of emission must < 100mg/m
3, key area concentration of emission must < 50mg/m
3, west area concentration of emission must < 200mg/m
3.Power plant will meet emission request; necessary desulfurization measure need be adopted to reduce the discharge capacity of sulphur; and compare with desulfurization methods such as desulfurization in rebuilding and expansion of the of the existing enterprises flue gas desulfur device, stove, buying low-sulfur coals; raw coal stokehole desulfuration deliming technology has unique advantage; it can increase the use amount of high-sulfur coal, alleviate high grey high-sulfur flue gas to the corrosion of equipment and wearing and tearing, increase SCR catalyst life-span, reduce recondition expense, reduce non-stop or fault occurrence probability, strengthen power plant purchase coal negotiate a price power, improve fuel availability, reduce environmental pollution.
Raw coal stokehole desulfuration deliming generally adopts coal preparation technology, by carrying out sorting to raw coal, can remove most ash content and sulphur content to improve Coal Quality, also can to the cleaned coal of different quality, specification utilize respectively to improve coal utilization rate, save coal resources.Such as, high-sulfur power raw coal sorting process disclosed in Chinese patent literature CN102489391A, comprise: high-sulfur power raw coal is become 50-6mm block raw coal and 6-0mm power raw coal through crushing and screening, 50-6mm block raw coal enters lump coal dense media shallow slot separation system, go out to wash block cleaned coal and spoil, 6-0mm power raw coal enters the sorting of heavy medium cyclone separation system, go out to wash power cleaned coal and spoil, the spoil that its medium sized coal dense media shallow slot separation system and heavy medium cyclone separation system produce all enters the sorting of autogenous medium cyclone gangue sorting system, go out pyrite concentrate and electric coal.The desulfurization performance of above-mentioned separation system is good, and effects of energy saving and emission reduction is remarkable, but because adopting dense media liquid as the working media of coal separation, causes needing conbined usage to dewater and slurry circulating system, cause capital expenditure and operating cost higher.
The gangue that raw coal produces after sorting is solid waste, a large amount of stackings of gangue, not only cover soil, influence ecological environment, also can pollute surrounding soil and underground water after spoil leaching water, and containing certain combustible in gangue, spontaneous combustion can be there is under appropriate conditions, the pernicious gases such as discharge sulfur dioxide, nitrogen oxide, oxycarbide and flue dust, cause environmental pollution, affect the healthy of resident.Under this background, the exploitation of gangue have become a research direction of this area.Chinese patent literature CN104258804A discloses a kind of method of comprehensive utilization of gangue, first gangue is adopted roasting, pulverizing, sulfuric acid to leach, centrifugation method make alumina-silica component separation, obtain aluminium salt Al
2(SO
4)
3solution and filter residue (SiO
2).Filter residue is added calcium hydroxide (Ca (OH)
2), be 1 according to Ca/Na mol ratio: the ratio of (1.0 ~ 2.0) adds caustic soda (NaOH), and adopt hydro-thermal autoclave method in 160 ~ 180 DEG C of hydro-thermal steam pressure reaction 16 ~ 18h, synthesize the tobermorite sewage disposal sorbing material that crystalline state is good.By the supernatant A l of leaching
2(SO
4)
3solution, the sodium bifluoride NaHF that composite sodium fluoride NaF and hydrofluoric acid HF is formed
2, through abundant stirring reaction 1 ~ 1.5h, synthesized ice crystal, reached comprehensive utilization gangue and prepare the object had compared with high added value material.Although the silica in gangue, aluminium oxide can be prepared into tobermorite sewage sorbing material and ice crystal by above-mentioned process respectively, the valuable metals such as the iron in gangue, rhodium, rhenium, gold, scandium, dysprosium are not effectively recycled.
As can be seen here, gangue is also a kind of available resources, how to strengthen the exploitation of gangue to produce high value-added product, always is the study hotspot of those skilled in the art.At present, China also pays much attention to the problem of complex utilization of gangue, and implemented in 1 day March in 2015 " gangue comprehensive utilization management method (revised edition in 2014) ", therefore, be badly in need of the research strengthening Technology of Comprehensive Utilization of Coal Gangue, promote that gangue fully utilizes the development of industry with this, solve a difficult problem for a series of puzzlement coal, electric power equal energy source enterprise, realize the organic unity of economic benefit, social benefit and environmental benefit.
Utility model content
What the utility model solved on the one hand is that raw coal sorting process of the prior art causes needing conbined usage to dewater and slurry circulating system as working media because adopting dense media liquid, cause capital expenditure and the high problem of operating cost, what solve on the other hand is cannot reclaim iron existing for gangue Application way of the prior art, rhodium, rhenium, gold, scandium, the defect of the valuable metals such as dysprosium, and then provide a kind of easy and simple to handle, with low cost, and recyclable iron, rhodium, rhenium, gold, scandium, dry separation and spoil utilization system before the raw coal stove of the valuable metals such as dysprosium.
The technical scheme that the utility model realizes above-mentioned purpose is:
Dry separation and spoil utilization system before a kind of raw coal stove, comprising:
Raw coal is sent into the first vibratory sieve to sieve, obtain the coal of particle diameter≤50mm and the coal of particle diameter > 50mm, the coal of described particle diameter≤50mm enters in the second vibratory sieve, obtains the coal of 50-6mm particle diameter and the Bed for Fine Coal of 0-6mm particle diameter after screening;
The coal of described 50-6mm particle diameter enters the efficient seperator of ZM mineral and carries out sorting, obtains the first cleaned coal and the first gangue; The Bed for Fine Coal of described 0-6mm particle diameter enters in fine fraction dry method pulse swirl separator, obtains the second cleaned coal and the second gangue through sorting; Described first cleaned coal and described second cleaned coal are sent into stokehold coal bunker;
Described first gangue and described second gangue enter gangue sorting machine and carry out sorting, obtain boiling coal and iron concentrate; Described iron concentrate is transported to sulfuric acid plant to prepare sulfuric acid, or described iron concentrate is sent in oxidizing roasting stove and carries out oxidizing roasting, the oxidizing roasting slag produced enters in reduction roaster and carries out reduction roasting, the reduction roasting slag obtained is sent in magnetic separator, through magnetic separation separating ferrum concentrate and magnetic tailing;
Described magnetic tailing is sent in leaching tanks and carry out valuable metal leaching process, and isolation andpurification is carried out to the valuable metal in leachate.
Before described first gangue and described second gangue are sent into gangue sorting machine, first described first gangue and described second gangue are sent in the first disintegrating machine and carry out break process, the gangue after fragmentation enters in described gangue sorting machine again and carries out sorting.
Described gangue sorting machine is three products heavy medium cyclone, and mine tailing sorting obtained and chats merge, and are described boiling coal.
Described boiling coal enters described stokehold coal bunker.
The sulfur-containing smoke gas that described iron concentrate oxidizing roasting produces is passed into relieving haperacidity unit, in order to prepare sulfuric acid or ammonium sulfate.
Described valuable metal is one or more in rhodium, rhenium, indium, gallium, germanium, gold, rubidium, scandium, dysprosium, terbium, gadolinium, yttrium.
Also comprise: the coal of described particle diameter > 50mm is sent into the second disintegrating machine, and the material after break process enters described first vibratory sieve again and sieves.
Compared with raw coal separation of the prior art and gangue utilization system, before raw coal stove described in the utility model, dry separation and spoil utilization system tool have the following advantages:
(1) dry separation and spoil utilization system before raw coal stove described in the utility model, sieve by raw coal being sent into the first vibratory sieve, obtain the coal of particle diameter≤50mm and the coal of particle diameter > 50mm, the coal of described particle diameter≤50mm enters in the second vibratory sieve, the Bed for Fine Coal of 50-6mm particle diameter and 0-6mm particle diameter is obtained after screening, and the efficient seperator of the coal of 50-6mm particle diameter feeding ZM mineral is carried out sorting, the Bed for Fine Coal of 0-6mm particle diameter is sent in fine fraction dry method pulse swirl separator and carry out sorting; The wholegrain level that can realize raw coal is like this selected in, and drastically increases raw coal utilization rate and coal-fired quality, reduces the emission reduction after power plant's stove, effectively prevent the wasting of resources.
And, the utility model limits and uses the dry coal preparation device such as the efficient seperator of ZM mineral and fine fraction dry method pulse swirl separator, can avoid using water in coal separation process, compared with the wet coal preparation device such as Separator of heavy medium shallow slot, heavy medium cyclone separator conventional in prior art, eliminate numerous and jumbled dehydration and slurry circulating system, make capital expenditure and operating cost all comparatively wet coal preparation factory significantly reduce, and the floor space of whole Recognition Applied in Coal Preparation System also reduces greatly, the place effectively alleviating surface plant is nervous; In addition, dry separation also has the advantage not increasing coal product moisture, is conducive to the caloric value improving coal.
(2) dry separation and spoil utilization system before raw coal stove described in the utility model, sorting is carried out by the first gangue and the second gangue are sent into gangue sorting machine, obtain boiling coal and iron concentrate, iron concentrate is sent in oxidizing roasting stove and carry out oxidizing roasting, the oxidizing roasting slag produced enters in reduction roaster and carries out reduction roasting, again the reduction roasting slag obtained is sent in magnetic separator, through magnetic separation separating ferrum concentrate and magnetic tailing, further, magnetic tailing is sent in leaching tanks and is carried out valuable metal leaching process, and isolation andpurification is carried out to the valuable metal in leachate, so just can realize there is high value-added product as valuable metals such as iron, rhodium, rhenium, gold, scandium, dysprosiums to the comprehensive utilization of gangue to produce.And the leached mud after leaching process also can be used for development architecture material, and make gangue utilization system of the present utility model produce without discarded object, safety and environmental protection, drastically increases the utilization ratio of gangue.
In addition, the sulfur-containing smoke gas that iron concentrate oxidizing roasting produces also is passed into relieving haperacidity unit by the utility model, in order to prepare the product such as sulfuric acid or ammonium sulfate, current Sulphuric acid source and multiple industrial chemicals situation in short supply can be alleviated, effectively improve resource utilization, avoid the wasting of resources and environmental pollution.
Accompanying drawing explanation
Fig. 1 is the structure chart of dry separation and spoil utilization system before raw coal stove described in the utility model;
Wherein, Reference numeral is as follows:
1-first vibratory sieve; 2-second vibratory sieve; The efficient seperator of 3-ZM mineral; 4-fine fraction dry method pulse swirl separator; 5-stokehold coal bunker; 6-gangue sorting machine; 7-oxidizing roasting stove; 8-reduction roaster; 9-magnetic separator; 10-leaching tanks; 11-first disintegrating machine; 12-relieving haperacidity unit; 13-second disintegrating machine; 14-sulfuric acid plant.
Detailed description of the invention
Below in conjunction with specific embodiment, dry separation before raw coal stove provided by the utility model and spoil utilization system are described in detail.
Dry separation and spoil utilization system before raw coal stove described in the present embodiment, comprising:
Raw coal being sent into screen cloth is sieve in first vibratory sieve 1 of 50mm, obtain the coal of particle diameter≤50mm and the coal of particle diameter > 50mm, the coal of described particle diameter≤50mm being entered screen cloth is in second vibratory sieve 2 of 6mm again, the Bed for Fine Coal of 50-6mm particle diameter and 0-6mm particle diameter is obtained after screening, wherein: the coal of described 50-6mm particle diameter enters the efficient seperator 3 of ZM mineral and carries out sorting, obtains the first cleaned coal and the first gangue; The Bed for Fine Coal of described 0-6mm particle diameter enters in fine fraction dry method pulse swirl separator 4, obtains the second cleaned coal and the second gangue through sorting, and described first cleaned coal and described second cleaned coal is sent in stokehold coal bunker 5 and use as high combustion value coal;
Described first gangue and described second gangue enter gangue sorting machine 6 and carry out sorting, obtain boiling coal and iron concentrate, described iron concentrate direct marketing can carry out sulfuric acid preparation to sulfuric acid plant, also can send in oxidizing roasting stove 7 and carry out oxidizing roasting, the oxidizing roasting slag produced enters in reduction roaster 8 and carries out reduction roasting, and the reduction roasting slag obtained is sent in magnetic separator 9, through magnetic separation separating ferrum concentrate and magnetic tailing; Wherein, described iron ore concentrate is used for Footwall drift iron, described magnetic tailing then can be sent into further in leaching tanks 10 and carry out valuable metal leaching process, and isolation andpurification is carried out to multiple valuable metals such as the rhodium in leachate, rhenium, indium, gallium, germanium, gold, rubidium, scandium, dysprosium, terbium, gadolinium, yttriums, and leached mud also can be used for development architecture material.
After the present embodiment passes through that gangue is carried out oxidizing roasting, reduction roasting, magnetic separation successively, recoverable metal iron, again magnetic tailing is carried out leaching process, so just can realize there is high value-added product as valuable metals such as rhodium, rhenium, gold, scandium, dysprosiums to the comprehensive utilization of gangue to produce, and this system produces without discarded object, safety and environmental protection, drastically increases the utilization ratio of gangue.In addition, before raw coal stove described in the present embodiment, dry separation and spoil utilization system can carry out sorting to the Bed for Fine Coal of 0-6mm particle diameter, the wholegrain level achieving raw coal is selected in, drastically increase raw coal utilization rate and coal-fired quality, reduce the emission reduction after power plant's stove, effectively prevent the wasting of resources.And, the present embodiment is by using the dry coal preparation device such as the efficient seperator of ZM mineral and fine fraction dry method pulse swirl separator, avoid using water in coal separation process, make capital expenditure and operating cost all comparatively wet coal preparation factory significantly reduce, the floor space of whole Recognition Applied in Coal Preparation System also reduces greatly, the place effectively alleviating surface plant is nervous, and dry separation also can not increase coal product moisture, is conducive to the caloric value improving coal.
As preferred embodiment, the present embodiment is before sending described first gangue and described second gangue into gangue sorting machine 6, first described first gangue and described second gangue are sent in the first disintegrating machine 11 and carry out break process, gangue through being crushed to appropriate particle size enters in described gangue sorting machine 6 again and carries out sorting, thus contributes to improving the efficiency of separation to gangue.
Further preferably, the gangue sorting machine 6 described in the present embodiment is three products heavy medium cyclone, and mine tailing sorting obtained and chats merge, and are described boiling coal, described boiling coal are sent into described stokehold coal bunker 5 and uses as low calorific value coal.
Same conduct preferred embodiment, the sulfur-containing smoke gas that described iron concentrate oxidizing roasting produces also is passed into relieving haperacidity unit 12 by the present embodiment, in order to prepare sulfuric acid or ammonium sulfate product, thus current Sulphuric acid source and multiple industrial chemicals situation in short supply can be alleviated, effectively improve resource utilization, avoid the wasting of resources and environmental pollution
As selectable variant, the coal of described particle diameter > 50mm is also sent in the second disintegrating machine 13 by the present embodiment, material after break process enters described first vibratory sieve 1 again and sieves, to guarantee the pan feeding particle diameter < 50mm of dry separation, thus be conducive to improving coal separation efficiency.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain that the utility model creates.
Claims (8)
1. dry separation and a spoil utilization system before raw coal stove, is characterized in that, comprise,
Raw coal screening plant, it comprises for being the coal of particle diameter≤50mm and first vibratory sieve (1) of the coal of particle diameter > 50mm and the second vibratory sieve (2) for being the coal of 50-6mm particle diameter and the Bed for Fine Coal of 0-6mm particle diameter by the coal screening of described particle diameter≤50mm by raw coal screening, and described first vibratory sieve (1) is communicated with described second vibratory sieve (2) and arranges;
Raw coal separation device, comprise the efficient seperator of ZM mineral (3) for by the coal separation of described 50-6mm particle diameter being the first cleaned coal and the first gangue and the dry method pulse swirl separator (4) for by the Fine grain content of described 0-6mm particle diameter being the second cleaned coal and the second gangue, the efficient seperator of described ZM mineral (3) and described dry method pulse swirl separator (4) are communicated with described second vibratory sieve (2) respectively and arrange; And
The spoil Integrated Processing Unit arranged is communicated with described raw coal separation device, described spoil Integrated Processing Unit comprise for by described first gangue and described second coal gangues automation selection be boiling coal with the gangue sorting machine (6) of iron concentrate and be communicated with described gangue sorting machine (6) the iron concentrate treating apparatus arranged, described iron concentrate enters described iron concentrate treating apparatus to reclaim sulphur and/or valuable metal.
2. dry separation and spoil utilization system before raw coal stove according to claim 1, it is characterized in that, described iron concentrate treating apparatus comprises the oxidizing roasting stove (7), reduction roaster (8), magnetic separator (9) and the leaching tanks (10) that connect setting successively, and the entrance of described oxidizing roasting stove (7) is connected with described gangue sorting machine (6).
3. dry separation and spoil utilization system before raw coal stove according to claim 2, it is characterized in that, described oxidizing roasting stove (7) is also connected with relieving haperacidity unit (12), makes sulfuric acid or ammonium sulfate with sulfur-containing smoke gas oxidizing roasting produced.
4. dry separation and spoil utilization system before raw coal stove according to claim 1, is characterized in that, described iron concentrate treating apparatus is sulfuric acid plant (14), for described iron concentrate is made sulfuric acid.
5. dry separation and spoil utilization system before the raw coal stove according to any one of claim 1-4, it is characterized in that, described spoil Integrated Processing Unit also comprises the first disintegrating machine (11) before the import being arranged on described gangue sorting machine (6).
6. dry separation and spoil utilization system before raw coal stove according to claim 5, is characterized in that, described gangue sorting machine (6) is three products heavy medium cyclone, is described boiling coal after the mine tailing that its sorting obtains and chats merge.
7. dry separation and spoil utilization system before raw coal stove according to claim 5, it is characterized in that, described raw coal screening plant also comprises the second disintegrating machine (13) for carrying out break process to the coal of described particle diameter > 50mm, and described second disintegrating machine (13) is connected with described first vibratory sieve (1).
8. before the raw coal stove according to claim 6 or 7, dry separation and spoil utilization system, is characterized in that, is also provided with stokehold coal bunker (5), to hold described first cleaned coal, the second cleaned coal and boiling coal.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179676A (en) * | 2016-07-18 | 2016-12-07 | 淮南矿业(集团)有限责任公司 | A kind of dry coal preparation and processing method |
| CN107008565A (en) * | 2017-05-09 | 2017-08-04 | 神华包头能源有限责任公司 | A kind of thermal coal deep screening and dense medium separation technique |
| CN109967202A (en) * | 2017-12-28 | 2019-07-05 | 兖矿科技有限公司 | Coal dry classification upgrading integral system and its processing method |
| CN110172597A (en) * | 2019-06-03 | 2019-08-27 | 贵州现代红腾工业废物利用科技有限公司 | A kind of gangue Sc extraction process |
-
2015
- 2015-05-12 CN CN201520303839.2U patent/CN204934007U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106179676A (en) * | 2016-07-18 | 2016-12-07 | 淮南矿业(集团)有限责任公司 | A kind of dry coal preparation and processing method |
| CN107008565A (en) * | 2017-05-09 | 2017-08-04 | 神华包头能源有限责任公司 | A kind of thermal coal deep screening and dense medium separation technique |
| CN109967202A (en) * | 2017-12-28 | 2019-07-05 | 兖矿科技有限公司 | Coal dry classification upgrading integral system and its processing method |
| CN110172597A (en) * | 2019-06-03 | 2019-08-27 | 贵州现代红腾工业废物利用科技有限公司 | A kind of gangue Sc extraction process |
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