CN205710640U - A kind of pulverized coal forming device - Google Patents
A kind of pulverized coal forming device Download PDFInfo
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- CN205710640U CN205710640U CN201620267979.3U CN201620267979U CN205710640U CN 205710640 U CN205710640 U CN 205710640U CN 201620267979 U CN201620267979 U CN 201620267979U CN 205710640 U CN205710640 U CN 205710640U
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Abstract
The utility model discloses a kind of pulverized coal forming device, including roller briquetting machine, feeding device and vaccum-pumping equipment；Gas in coal dust is aspirated to deaerate by vaccum-pumping equipment by this utility model, improves the pre-compressed effect of coal dust and follow-up shaping strength.
Description
Technical field
This utility model belongs to coal dust machine-shaping field, particularly to a kind of pulverized coal forming device.
Background technology
The energy resource structure of China is many coals few gas of few oil, according to statistics, by the end of the year 2007, the conventional primary energy of China is verified and is remained in mining resources amount (including coal, oil, natural gas and water energy), and coal accounts for 73.2%, and oil accounts for 1.3%, natural gas accounts for 1.3%, and water can account for 24.2%.Within 2007, Chinese coal yield reaches 25.36 hundred million t, and total quantity consumed reaches 25.8 hundred million t, and the proportion at primary energy is respectively 76.4% and 69.5%, and the yield of coal and consumption account for absolutely main force.The energy-consuming present situation of China determine China's current energy source policy adjustment focus on coal is cleaned, efficient uses.As the one of Filter Tuber For Clean Coal production technology, moulded coal produce have simple to operate, technology maturation, with low cost, energy efficiency substantially, the advantage such as discharge amount of exhaust gas minimizing, be worth us to greatly develop.
Pulverized coal forming technology has been widely used in the field of deep of raw coal, such as, in Activated Carbon Production, it is widely used with the method that coal prepares active carbon from coal for raw material, so that to activated carbon there is higher-strength in use, typically requiring and carry out forming processes before coal carries out carbonization-activation, therefore, coal high intensity molding is also the basis preparing high intensity activated carbon.
Conventional pulverized coal forming device has roller briquetting machine, coal dust between two pressure rollers of roller briquetting machine by molded.
For the feed coal that caking property is poor, in molding, remain a need for adding various binding agent to assist pulverized coal forming, not only increase cost, and be easily caused coal charge molding rear section in forming process and still stick on roller.At present, coal dust (coal dust that the particularly no adhesion coal is made) molding research of binder free also increasingly becomes the focus of people's research, although this can be prevented effectively from feed coal to the adhesion on roller, but in order to prepare the more preferably shaped coal such as intensity, be also necessarily required to former is proposed higher requirement simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of pulverized coal forming device, to prepare intensity more preferably shaped coal.
For achieving the above object, the pulverized coal forming device of this utility model offer is by the following technical solutions:
A kind of pulverized coal forming device, including roller briquetting machine and feeding device, described feeding device is arranged at above the pressure roller of described roller briquetting machine, for the coal dust to be formed to the conveying of described roller briquetting machine；Wherein, described pulverized coal forming equipment also includes vaccum-pumping equipment；Described feeding device includes warehouse, the export department being arranged at described warehouse lower end and is arranged at the pressure feeding spiral in described warehouse and export department,
Described warehouse include shell and in the taper filter plate that is lining in described shell, the upper/lower terminal of described filter plate is connected with described body seal respectively, thus between described filter plate and shell, forming filter chamber, described vaccum-pumping equipment is connected to described filter chamber, for removing the gas in described coal dust；
Described pressure feeding spiral includes that rotating shaft and the length direction along described rotating shaft are coiled in the helical blade in described rotating shaft, and the outer of described helical blade is arranged near the inwall of described filter plate and export department.
In this utility model, by filter chamber and vaccum-pumping equipment, the gas in coal dust is aspirated to deaerate, it is preferable that the filtering accuracy of described filter plate is 5～15 μm, more preferably 8～12 μm, such as 10 μm.Described filter plate can use metal gauze sintered plate, and sintered plate is ventilative, but coal dust cannot pass through.It addition, for ensureing degasifying effect, art technology understands, described warehouse operationally needs to be in a certain degree of sealing state, such as keeping charging and the discharging of certain seal degree, discharge method the most of the present utility model is natural has certain sealing effectiveness, can meet requirement；For charging, twin screw batcher and/or Starlike valve can be set on the charging aperture of described warehouse, thus with certain seal degree, coal dust continuous-stable is conveyed in warehouse.
In this utility model, it is lining in warehouse in described taper filter plate, in can being, be lining in whole warehouse sidewall, or the sidewall of only warehouse bottom, i.e. the top of warehouse can be provided with or without filter plate.
In this utility model, making the material in warehouse discharge from export department by the rotation of helical blade, the outer of described helical blade is arranged near the inwall of described filter plate and export department, such as its spacing is not more than 10mm, or no more than 5mm, again or no more than 2mm, such as 0.5mm, 1mm or 1.5mm.
According to pulverized coal forming device of the present utility model, preferably, described pressure feeding spiral also includes scraping lath, described lath of scraping is fixed on the outer of described helical blade, and fit with described filter plate surface, such that it is able to wipe the coal dust being attached to filter plate surface off with the rotation of described helical blade, reduce blocking, improve degasifying effect, and and then improve final molding intensity；Preferably, lath is scraped described in the same plane with described rotating shaft.
According to pulverized coal forming device of the present utility model, preferably, described feeding device also includes distributing trough, described distributing trough is installed to described export department lower end, material for making described export department discharge axially is uniformly distributed along it on described pressure roller, such as, the lower end of described distributing trough could be arranged to rectangle or other similarities, in order to improves the global formation intensity of coal dust；It is further preferred that the lower end of described rotating shaft is tapered, and extend in described distributing trough through described export department.
According to pulverized coal forming device of the present utility model, it is preferable that described filter plate is 12 °～30 ° with the angle of its central shaft, further preferred 15 °～30 °, such as 20 ° or 25 °；The diameter of described rotating shaft is 1:2～1:4, such as 1:3 with the ratio of the internal diameter of described export department.Above-mentioned angle is used to not only contribute to prevent coal dust too fast compression under the effect of helical blade, coordinate with thicker rotating shaft simultaneously, be conducive to improving the degassing face of unit coal dust, the smooth degassing during descending of the final guarantee coal dust, improve the pre-compressed effect of coal dust and follow-up shaping strength；It is highly preferred that the pitch of described helical blade is described shaft diameter 1～2 times；It addition, the pitch of described helical blade can also the most progressively reduce, to regulate the precommpression ratio of coal dust.
According to pulverized coal forming device of the present utility model, it is preferable that the helical blade being positioned at described filter plate is provided with at least 3 spirals, preferably 3～6 spirals, such as 4 or 5；It is positioned at the helical blade of described export department at least provided with 0.5 spiral, preferably 0.5～2.5 spiral, such as 1 or 2.Aforesaid 0.5 spiral refers to that helical blade coils 180 ° in rotating shaft.
Utilizing pulverized coal forming device of the present utility model to carry out pulverized coal forming, the adaptability of feed coal is extensive, can be the mixture of one or more in no adhesion coal, weak caking coal, medium binding coal on the weak side, medium inclined heavy caking coal or heavy caking coal.Described no adhesion coal, weak caking coal, medium binding coal on the weak side, medium inclined heavy caking coal or heavy caking coal are known in the art, i.e., classify by adhesive index, 0～5 is no adhesion coal, 5～20 is weak caking coal, 20～50 is medium binding coal on the weak side, and 50～65 is medium inclined heavy caking coal, is heavy caking coal more than 65.
It will be appreciated by those skilled in the art that the caking index of feed coal is the highest, be more conducive to molding to prepare the moulded coal that intensity is higher, and the caking index of feed coal is the lowest, then to prepare the difficulty of the higher moulded coal of intensity the biggest in molding.Forming process of the present utility model is by being de-gassed coal dust and other adjusts accordingly, feed coal that whether caking index is higher or the relatively low feed coal of caking index is made all can successfully to prepare high intensity moulded coal, it is therefore particularly suitable for the molding (degasifying effect is more preferably) with no adhesion coal or the feed coal based on no adhesion coal, such as, described feed coal all no adhesions coal, or the content of no adhesion coal is more than 50wt% in described feed coal, it is such as 60wt%, 70wt%, 80wt% or 90wt%, remainder can be weak caking coal etc., preferably, the caking index of described no adhesion coal is≤2, for example, 0, 1 or 2.In this utility model, the caking index of described feed coal is preferably no greater than 30, and the most no more than 20, more preferably no more than 10, the most no more than 5, i.e. no adhesion coal.
In this utility model, the material in warehouse is de-gassed process, to reduce between pulverized coal particle and the air of surface adsorption, thus is conducive to improving shaping strength.When negative pressure is excessive, can carry out blowback, with blockage resisting, such as vacuum pump uses DCS to control, when negative pressure is more than 6Kpa, and blowback 1 second.
Compared with prior art, the gas in coal dust is aspirated to deaerate by filter chamber and vaccum-pumping equipment by this utility model, improves pressure feeding spiral to the pre-compressed effect of coal dust and follow-up shaping strength.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of embodiment of the present utility model；
Fig. 2 is the schematic diagram of another embodiment of the present utility model；
Fig. 3 is the schematic top plan view of distributing trough in Fig. 2.
Detailed description of the invention
Below in conjunction with accompanying drawing, pulverized coal forming device of the present utility model is described in detail, but this utility model is not limited to that.
As it is shown in figure 1, in one embodiment, pulverized coal forming device of the present utility model includes roller briquetting machine 1, feeding device and vaccum-pumping equipment 3.Wherein, described feeding device is arranged at above the pressure roller 11 of described roller briquetting machine 1, for carrying coal dust to be formed to described roller briquetting machine 1, in order to molding.Described roller briquetting machine 1 can be commonly used in the art coal roller briquetting machine, such as BEPEX company produce MS150 type type roller briquetting machine, known in the art, repeat no more here.The vacuum machine that described vaccum-pumping equipment 3 is the most commonly used in the art, known in the art, repeat no more here.
Described feeding device includes warehouse 21, is arranged at the export department 22 of described warehouse 21 lower end, and is arranged at the pressure feeding spiral in described warehouse 21 and export department 22.Described warehouse 21 include shell 25 and in be lining in the taper filter plate 26 in described shell 25, the upper/lower terminal of described filter plate 26 is tightly connected with described shell 25 respectively, thus between described filter plate and shell, form filter chamber, described vaccum-pumping equipment 3 is connected to described filter chamber, for removing the gas in described coal dust.Preferably, the filtering accuracy of described filter plate 26 is 5～15 μm, more preferably 8～12 μm, such as 10 μm.Described filter plate 26 is metal gauze sintered plate, and sintered plate is ventilative, but coal dust cannot pass through.
Described pressure feeding spiral includes rotating shaft 23, scrapes lath 28, and is coiled in the helical blade 24 in described rotating shaft 23 along the length direction of described rotating shaft 23.The outer of described helical blade 24 is arranged near the inwall of described filter plate 26 and export department 22, and wherein, the helical blade 24 being positioned at described filter plate 26 is provided with 4 spirals, and the helical blade being positioned at described export department is provided with 1 spiral.Preferably, the angle of described filter plate 26 and its central shaft (i.e. acute angle folded by filter plate and rotating shaft) is 12 °～30 °, further preferred 15 °～30 °, such as 20 ° or 25 °；The diameter of described rotating shaft 23 is 1:2～1:4, such as 1:3 with the ratio of the internal diameter of described export department 22, to better ensure that the coal dust smooth degassing during descending, improves the pre-compressed effect of coal dust and follow-up shaping strength；It is highly preferred that 1～2 times that the pitch of described helical blade 24 is described rotating shaft 23 diameter；It addition, the pitch of described helical blade 24 can also the most progressively reduce, to regulate the precommpression ratio of coal dust.
It is described that to scrape lath 28 elongated, in the same plane with described rotating shaft 23, and be fixed on the outer of described helical blade 24, fit with described filter plate 26 surface, such that it is able to wipe the coal dust being attached to filter plate 26 surface off with the rotation of described helical blade 24, reduce blocking, improve degasifying effect.Certainly, it will be understood by those skilled in the art that in other embodiments, described in scrape in lath 28 can not be generally aligned in the same plane with described rotating shaft 23.
As shown in Figure 2, in a preferred embodiment, described feeding device also includes distributing trough 29, described distributing trough 29 is installed to described export department 22 lower end, wherein, as it is shown on figure 3, described distributing trough 29 upper end is the circular open 4 that the lower end with described export department 22 matches, the lower end of described distributing trough 29 is for approximating rectangular opening 5, thus the material that described export department 22 can be made to discharge axially is uniformly distributed along it on described pressure roller 11.Certainly, it will be understood by those skilled in the art that the lower end of described distributing trough 29 can also is that other analogous shape being conducive to material to be distributed.It addition, the lower end of described rotating shaft 23 is tapered, and extend in described distributing trough 29 through described export department 22.
When pulverized coal forming equipment of the present utility model runs, coal dust to be formed is by the charging continuous, stable of the Starlike valve 27 on warehouse 21 charging aperture.In warehouse 21, pressure feeding spiral rotates under the drive of external motor (not shown), make coal dust during carrying downwards through taper filter plate 26, progressively compressed, simultaneously, by filter chamber and vaccum-pumping equipment 3, the gas in coal dust is aspirated to deaerate, thus be more beneficial for compression.Coal dust through taper filter plate 26 continues downwards in cylindrical export department 22, the shape making the most precompressed coal dust is maintained certain time, after the precommpression effect of stable coal dust, continue under the effect of helical blade 24, be downwardly into distributing trough 29, along the axially preferably distribution of pressure roller 11 under the effect of the tapered distal end of rotating shaft simultaneously 23, after extruded through roller briquetting machine 1.
This utility model is illustrated the most in conjunction with the embodiments.
Wherein, the characterizing method of relevant parameter is described as follows:
Particle mean size-GB/T 19077.1-2008 grain size analysis laser diffractometry
Intensity-be measured according to GB/T7702.3-2008.
Wherein, raw materials used coal character is as follows:
Hami coal, from Poly colliery, Xinjiang, its index is: moisture 5.17wt%, and air-dried basis ash is 1.31wt%, dry ash free basis volatile matter 35.54wt%, and caking index 2 belongs to no adhesion coal；
The long bituminous coal in mining area, Black Hills, from colliery, Fauna From Toksun, Xinjiang Black Hills, its index is: moisture 3.43wt%, air-dried basis ash 3.52wt%, dry ash free basis volatile matter 37.16wt%, and caking index 0 belongs to no adhesion coal.
In following example/comparative example, described former is to roll-in block forming machine, manufacturer: BEPEX company；Model: MS150.
Embodiment 1
(1), being mixed homogeneously by long with mining area, Black Hills for Hami coal bituminous coal 1:1 in mass ratio, and be crushed to the coal dust that mean diameter is 25 μm, be utilized respectively 180 mesh sieves and 360 mesh sieves sieve, wherein, particle diameter is 4.2wt% more than the coal dust content of 80 μm；Particle diameter is 16wt% more than the coal dust content of 40 μm；
(2) coal dust, by (1) obtained, in Starlike valve sends into feeding device as shown in Figure 2, is de-gassed process to the material in warehouse, makes the negative pressure in warehouse be maintained at 2.5kPa～3kPa；
(3), make the temperature of material in described warehouse be maintained at 80 DEG C～85 DEG C, moisture be about 3wt%；
(4), the material in described warehouse is being shaped by spiral forced feeding machine feeding former, during molding, roller top-stitching pressure is being about 11～12t/cm, to obtain Forming press material (moulded coal).
Detection Forming press material intensity, intensity distributions is 88～94.After being averaged according to quality, mean intensity is 92.
Comparative example 1
Difference with above-described embodiment 1 is, without filter plate in warehouse.
Detection briquette strength, intensity distributions is 83～94.After being averaged according to quality, mean intensity is 89.
Claims (10)
1. a pulverized coal forming device, including roller briquetting machine and feeding device, described feeding device is arranged at above the pressure roller of described roller briquetting machine, for the coal dust to be formed to the conveying of described roller briquetting machine；It is characterized in that, described pulverized coal forming equipment also includes vaccum-pumping equipment；Described feeding device includes warehouse, the export department being arranged at described warehouse lower end and is arranged at the pressure feeding spiral in described warehouse and export department,
Described warehouse include shell and in the taper filter plate that is lining in described shell, the upper/lower terminal of described filter plate is connected with described body seal respectively, thus between described filter plate and shell, forming filter chamber, described vaccum-pumping equipment is connected to described filter chamber, for removing the gas in described coal dust；
Described pressure feeding spiral includes that rotating shaft and the length direction along described rotating shaft are coiled in the helical blade in described rotating shaft, and the outer of described helical blade is arranged near the inwall of described filter plate and export department.
Pulverized coal forming device the most according to claim 1, it is characterised in that described pressure feeding spiral also includes scraping lath, described in scrape lath and be fixed on the outer of described helical blade, and fit with described filter plate surface.
Pulverized coal forming device the most according to claim 1 and 2, it is characterised in that described feeding device also includes distributing trough, described distributing trough is installed to described export department lower end, is axially uniformly distributed along it for the material making described export department discharge on described pressure roller.
Pulverized coal forming device the most according to claim 3, it is characterised in that the lower end of described rotating shaft is tapered, and extend in described distributing trough through described export department.
Pulverized coal forming device the most according to claim 4, it is characterised in that described filter plate is 12 °～30 ° with the angle of its central shaft, and the diameter of described rotating shaft is 1:2～1:4 with the ratio of the internal diameter of described export department.
Pulverized coal forming device the most according to claim 5, it is characterised in that the pitch of described helical blade is 1～2 times of described shaft diameter.
Pulverized coal forming device the most according to claim 6, it is characterised in that the helical blade being positioned at described filter plate is provided with 4～8 spirals, the helical blade being positioned at described export department is provided with 0.5～1 spiral.
Pulverized coal forming device the most according to claim 1, it is characterised in that the filtering accuracy of described filter plate is 5～15 μm.
Pulverized coal forming device the most according to claim 2, it is characterised in that described in scrape lath in the same plane with described rotating shaft.
Pulverized coal forming device the most according to claim 6, it is characterised in that the pitch of described helical blade the most progressively reduces.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105861090A (en) * | 2016-03-31 | 2016-08-17 | 神华集团有限责任公司 | Pulverized coal molding apparatus and molding method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105861090A (en) * | 2016-03-31 | 2016-08-17 | 神华集团有限责任公司 | Pulverized coal molding apparatus and molding method |
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