CN112129742A - Coal element detector - Google Patents
Coal element detector Download PDFInfo
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- CN112129742A CN112129742A CN202010945066.3A CN202010945066A CN112129742A CN 112129742 A CN112129742 A CN 112129742A CN 202010945066 A CN202010945066 A CN 202010945066A CN 112129742 A CN112129742 A CN 112129742A
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- 239000003245 coal Substances 0.000 title claims abstract description 50
- 239000000956 alloy Substances 0.000 claims abstract description 55
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 55
- 239000000835 fiber Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- 238000004458 analytical method Methods 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 239000011593 sulfur Substances 0.000 abstract description 3
- 238000002536 laser-induced breakdown spectroscopy Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000013307 optical fiber Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 230000003595 spectral effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 4
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- 238000002360 preparation method Methods 0.000 description 2
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
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- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/718—Laser microanalysis, i.e. with formation of sample plasma
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
The invention discloses a coal element detector which comprises an alloy frame, wherein alloy support columns are arranged at four corners of the lower end of the alloy frame, an alloy bottom plate is arranged at the upper end of the alloy frame, a supporting plate is longitudinally arranged on the right side of the upper end surface of the alloy bottom plate, a first mounting hole is formed in the middle of the supporting plate, a plurality of second mounting holes are formed in the periphery of the middle of the supporting plate, a collecting mirror main body is inserted into the second mounting holes, a collecting mirror group is embedded in the inner cavity of the collecting mirror main body, and a mounting plate is arranged on the left side of the inner cavity of the collecting mirror main body. The composition and proportion of each element contained in the coal are accurately measured by the laser-induced plasma spectroscopy principle, so that the on-line measurement of the ash content, the sulfur content, the calorific value, the volatile content or other coal industrial analysis indexes is realized.
Description
Technical Field
The invention relates to the technical field of analytical chemistry and coal industry, in particular to a coal element detector.
Background
Coal is a solid combustible mineral formed gradually by ancient plants buried underground and undergoing complex biochemical and physicochemical changes. A solid combustible organic rock is prepared from plant remains through biochemical action, burying and geological transformation. Coal is commonly called coal, and besides being used as fuel to obtain heat and kinetic energy, more important is the preparation of metallurgical coke and the preparation of artificial petroleum, namely coal tar which is a liquid product of low-temperature dry distillation of coal. After chemical processing, thousands of chemical products can be produced from coal, so that the coal is also a very important chemical raw material, and the coal is used for modern industries, namely heavy industry and light industry; the coal quality and properties are determined by measuring the ash content and other industrial analysis indexes, and the coal quality and properties play an important role in the energy industry, the metallurgical industry, the chemical industry and the mechanical industry, the light textile industry, the food industry and the transportation industry. The ash content refers to the percentage of the dry weight of coal which is finally left after chemical reaction when the coal is completely combusted. From the definition, the only way to measure the true ash of coal is by burning a dried coal sample in a defined environment, comparing the solid residue to the dry weight of the coal. Therefore, the method of directly measuring ash cannot realize on-line measurement. In the field detection, a fast floating method, an X-ray method and a gamma-ray method can be adopted. However, these measurement methods essentially reverse-predict the ash content of coal by measuring the density or ray absorption properties of coal, and cannot directly provide ash component information, and thus the equipment operation is cumbersome, and the result accuracy is poor.
Disclosure of Invention
The invention aims to provide a coal element detector, which aims to solve the problem that the only method for measuring the real ash content of coal in the background technology is to burn a dried coal sample in a specified environment and compare the dry weight of solid residues and the dry weight of the coal. Therefore, the method of directly measuring ash cannot realize on-line measurement. In the field detection, a fast floating method, an X-ray method and a gamma-ray method can be adopted. However, these measurement methods essentially reverse-predict the ash content of coal by measuring the density or ray absorption properties of coal, and cannot directly provide ash component information, and thus the equipment operation is complicated, and the result accuracy is poor.
In order to achieve the purpose, the invention provides the following technical scheme: a coal element detector comprises an alloy frame, alloy pillars are arranged at four corners of the lower end of the alloy frame, an alloy bottom plate is arranged at the upper end of the alloy frame, a supporting plate is longitudinally arranged on the right side of the upper end face of the alloy bottom plate, a first mounting hole is formed in the middle of the supporting plate, a plurality of second mounting holes are formed in the periphery of the middle of the supporting plate, collecting mirror main bodies are inserted into the second mounting holes, the collecting mirror main bodies are distributed in an annular array mode by taking the center of the first mounting hole as a midpoint, collecting mirror groups are embedded in the inner cavity of the collecting mirror main bodies, the collecting mirror groups arranged in the inner cavity of the collecting mirror main bodies are formed by coupling two lenses, the right focal length of each collecting mirror group is equal to the distance from each collecting mirror group to the focusing positions of the plurality of collecting mirror main bodies, a mounting plate is arranged on the left side of the, the left end of the mounting plate is connected with a multimode optical fiber bundle, the left focal length of the collecting lens group is equal to the distance from the collecting lens group to the left port of the multimode optical fiber bundle, the left side of the multimode optical fiber bundle is provided with an optical fiber jumper, the right side of the multimode optical fiber bundle is provided with a plurality of single-core optical fibers, a lens group sleeve is embedded in the first mounting hole, a first beam expander, a second beam expander and a focusing lens are sequentially mounted in an inner cavity of the lens group sleeve from left to right, the left side of the lens group sleeve is connected with a high-energy laser, the lower end of the high-energy laser is provided with a height adjusting device, the height adjusting device comprises a bottom mounting plate, the lower end of the bottom supporting plate is mounted on the upper end face of the alloy bottom plate, linear bearings are inserted in four corners of the bottom supporting plate, and guide shafts are longitudinally, the lower end of the guide shaft penetrates through the plate wall of the alloy bottom plate, a guide shaft support is mounted at the upper end of an outer shaft rod of the guide shaft, a middle-load type lifting device is mounted in the middle of the upper end face of the bottom mounting plate, limiting columns are connected between adjacent end faces of connecting rods on the front side and the rear side of the middle-load type lifting device in a pin mode, the number of the limiting columns is two, the limiting columns are connected to the left side and the right side of the connecting rod in the middle of the middle-load type lifting device in a pin mode, the middle of the limiting columns on the left side and the right side transversely penetrates through the guide rod, a radial hand wheel is mounted at the left end of the guide rod, a lifting plate is mounted at the upper end of the middle-load type lifting device, the lower end face of.
Preferably, the alloy frame, the alloy pillar and the alloy bottom plate are all of a hard alloy structure, thick supports are installed at the joints of the lower end face of the alloy frame and the alloy pillar, the upper sides of the thick supports are fixed to the lower end face of the alloy frame through bolts, and the lower sides of the thick supports are fixed to the side faces of the alloy pillar through bolts.
Preferably, line segments between focusing positions at the right ends of the collecting mirror main bodies and the middle points of the mirror group sleeves and transverse straight lines where the middle points of the mirror group sleeves are located are all on the same point straight line.
Preferably, the high-energy laser adopts an Nd: Yag laser with pulse energy larger than 10 mJ, the diameter of a light spot is 1-15 mm, and the repetition frequency range is 1-200 Hz.
Preferably, the first beam expander is a concave lens, the second beam expander is a convex lens, and the first beam expander and the second beam expander are combined into a galileo beam expander form.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a coal element detector which is a compound eye type coal element laser on-line analyzer. The composition and proportion of each element contained in the coal are accurately measured by the laser-induced plasma spectroscopy principle, so that the on-line measurement of the ash content, the sulfur content, the calorific value, the volatile content or other coal industrial analysis indexes is realized.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic cross-sectional view of the sleeve of the lens assembly of the present invention;
FIG. 3 is a schematic diagram of a multimode fiber bundle according to the present invention;
FIG. 4 is a schematic side view of the height adjustment device of the present invention;
FIG. 5 is a schematic diagram of a side view of an optical fiber patch cord;
fig. 6 is a side view of the supporting plate.
In the figure: 1-alloy frame, 2-alloy support, 3-alloy bottom plate, 4-support plate, 5-first mounting hole, 6-second mounting hole, 7-collecting mirror main body, 8-collecting mirror group, 9-mounting plate, 10-multimode optical fiber bundle, 101-optical fiber jumper 101, 102-single core optical fiber, 11-mirror group sleeve and 12-first beam expander, 13-a second beam expander, 14-a focusing lens, 15-a high-energy laser, 16-a bottom mounting plate, 17-a linear bearing, 18-a guide shaft, 19-a guide shaft support, 20-a middle-loading type lifting device, 21-a limiting column, 22-a guide rod, 23-a radial hand wheel, 24-a lifting plate, 25-a high-precision spectrometer and 26-a thick bracket.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a coal element detector comprises an alloy frame 1, alloy pillars 2 are arranged at four corners of the lower end of the alloy frame 1, an alloy bottom plate 3 is arranged at the upper end of the alloy frame 1, a supporting plate 4 is longitudinally arranged at the right side of the upper end face of the alloy bottom plate 3, a first mounting hole 5 is arranged in the middle of the supporting plate 4, a plurality of second mounting holes 6 are arranged around the middle of the supporting plate 4, a plurality of n2 collecting lens bodies are typically 4-8, a collecting lens main body 7 is inserted in the second mounting hole 6, the collecting lens main bodies 7 are distributed in an annular array by taking the center of the first mounting hole 5 as the midpoint, a collecting lens group 8 is embedded in the inner cavity of the collecting lens main body 7, the collecting lens group 8 arranged in the inner cavity of the collecting lens main body 7 is formed by coupling two lenses, the right focal length of the collecting lens group 8 is equal to the distance from the collecting lens group 8 to the, a mounting plate 9 is arranged on the left side of the inner cavity of the collecting lens main body 7, a multimode optical fiber bundle 10 is connected to the left end of the mounting plate 9, the focal length of the left side of the collecting lens group 8 is equal to the distance from the collecting lens group 8 to the port on the left side of the multimode optical fiber bundle 10, an optical fiber jumper 101 is arranged on the left side of the multimode optical fiber bundle 10, a plurality of single-core optical fibers 102 are arranged on the right side of the multimode optical fiber bundle 10, a lens group sleeve 11 is embedded in the first mounting hole 5, a first Galileo beam expander lens 12, a second Galileo beam expander lens 13 and a focusing lens 14 are sequentially arranged in the inner cavity of the lens group sleeve 11 from left to right, the first Galileo beam expander lens 12 and the second Galileo beam expander lens 13 are both lens components capable of changing the diameter and the divergence angle of a laser beam, the first Galileo beam expander lens 12 and the second Galileo beam expander lens 13 form a Galileo beam expander, a, the lower end of the high-energy laser 15 is provided with a height adjusting device, the height adjusting device comprises a bottom mounting plate 16, the lower end of the bottom supporting plate 16 is mounted on the upper end surface of the alloy bottom plate 3, four corners of the bottom supporting plate 16 are all inserted with linear bearings 17, guide shafts 18 are all longitudinally inserted in the linear bearings 2, the lower ends of the guide shafts 18 penetrate through the plate wall of the alloy bottom plate 3, the upper ends of outer shaft rods of the guide shafts 18 are provided with guide shaft supports 19, the middle part of the upper end surface of the bottom mounting plate 16 is provided with a middle-load type lifting device 20, limiting columns 21 are pin-connected between the adjacent end surfaces of front and rear side connecting rods of the middle-load type lifting device 20, the number of the limiting columns 21 is two and pin-connected with the left side and the right side of a middle connecting rod of the middle-load type lifting device 20, the middle parts of the left and right side limiting columns 21 transversely penetrate through the guide rod 22, the, the lower end surface of the elevating plate 24 is attached to the upper end of the guide shaft support 19, and the left side of the upper end surface of the elevating plate 24 is attached with the high-precision spectrometer 25, and the high-precision spectrometer 25 is a scientific instrument for decomposing light with complicated components into spectral lines, and is composed of a prism, a diffraction grating, or the like. The light intensity distributions at different wavelengths can be measured using a high precision spectrometer 25. The grabbing of laser-induced plasma light information by the high-precision spectrometer 25 or the displaying and analyzing of a computerized automatic display numerical instrument are used for measuring which elements are contained in the article.
Specifically, the alloy frame 1, the alloy support 2 and the alloy base plate 3 are all made of cemented carbide, thick brackets 26 are mounted at the joints of the lower end surface of the alloy frame 1 and the alloy support 2, the upper sides of the thick brackets 26 are fixed to the lower end surface of the alloy frame 1 by bolts, and the lower sides of the thick brackets 26 are fixed to the side surfaces of the alloy support 2 by bolts.
Specifically, line segments between the focusing positions at the right ends of the plurality of collecting mirror bodies 7 and the middle point of the mirror group sleeve 10 and a horizontal straight line where the middle point of the mirror group sleeve 10 is located are all on the same point straight line.
Specifically, the high-energy laser 15 is an Nd-Yag laser with pulse energy greater than 10 mJ, the spot diameter is 1-15 mm, and the repetition frequency range is 1-200 Hz.
Specifically, the first beam expander 12 is a concave lens, the second beam expander 13 is a convex lens, and the first beam expander 12 and the second beam expander 13 are combined into a galilean beam expander form.
The working principle is as follows: when the invention is used, firstly, the high-energy laser 15 is adjusted to a proper height through the height adjusting device, the first beam expander 12 is a concave lens, the second beam expander 13 is a convex lens, and the first beam expander 12 and the second beam expander 13 are combined into a Galileo beam expander form, firstly, the first beam expander 12 with the focal length of f1 is used for expanding the light spot to a required multiple n1, then, the second beam expander 13 with the focal length of f2 is used, and the focal lengths of the two lenses are selected and expanded according to the following relation:
n1＝-f1/f2
the expanded laser spots are focused through a focusing lens 14f3, the focusing focus is located on the surface of a sample to be detected, plasma is induced on the surface of the sample, the collection mirror group 7 is used for collecting radiation light of the laser-induced plasma on the surface of the sample, the collection mirror group 8 arranged in the inner cavity of the collection mirror main body 7 is composed of two lens coupling modes, the right focal length f4 of the collection mirror group 8 is equal to the distance from the collection mirror group 8 to the focusing positions of the collection mirror main bodies 7, the left focal length f5 of the collection mirror group 8 is equal to the distance from the collection mirror group 8 to the left port of the multimode optical fiber bundle 10, a laser light path is communicated in a mirror group sleeve 11, the laser light path is located in the center of the support plate, the first beam expander 12, the second beam expander 13 and the focusing lens 14 are all located on the laser light path, the collection mirror
θ＝arccos(f3/f4)
The special optical fiber is a linear 1-turn n2 fanout optical fiber bundle, wherein n2 is the number of focusing lenses. N of the multimode optical fiber bundle 10 with one end arranged linearly2 optical fiber jumpers 101, the other end is n2 single-core optical fibers 102, the optical fiber jumpers 101 are made of high-hydroxyl materials, the multimode optical fiber bundle 10 guides the plasma radiation collected by n2 focusing lenses into the high-precision spectrometer 25, the high-precision spectrometer 25 performs light splitting and collection on the plasma radiation to obtain a coal sample surface laser-induced plasma spectrum and obtain spectral line intensities of different atoms on the laser-induced plasma spectrum, important among them are carbon (247.84nm), hydrogen (656.22 nm), oxygen (777.34nm), sulfur (414.26nm), silicon (288.13nm), aluminum (309.27 nm), titanium (334.92nm), iron (393.36nm), magnesium (285.17nm), calcium (422.69 nm), sodium (589.72nm), arsenic (228.81nm), mercury (253.65nm) and the like, and the molar ratio of carbon elements and other elements in the coal sample to be measured can be known by calculating the intensity ratio of the spectral lines of carbon atoms and other atoms. The proportion of each element in the coal can be obtained through the molar ratio of the carbon element to other elements. The following description will be made in detail by taking ash as an example, assuming that the intensity of the carbon atomic spectrum line is ICOxygen atomic spectral line intensity of IOThe intensity of the spectral line of hydrogen atom spectrum is IHThe atomic spectral line intensities of other elements are respectively IiI is the kind of other elements, the first is 1, the second is 2, the total number of elements detected is N, and so on. The mole fractions of the carbon element and the hydrogen element in the sample are:
m is the atomic weight of the element, and the molar fraction is converted into the mass fraction:
in conventional muffle ash measurement methods, almost all of the hydrogen and carbon elements in coal leave the coal sample in a gaseous state, and the remainder is ash, which includes all of the oxygen elements in the raw coal and oxygen elements obtained from the air during muffle firing. Fired in a muffle furnaceIn the process, non-hydrocarbon oxygen elements in coal almost exist in the form of oxidant. Thus, the mass of all oxygen species plus the mass of oxides of all non-hydrocarbon oxygen species in the coal sample corresponds to the weight of ash in the coal. Assuming that the molecular formula of the oxide of the i element is iOa/bThe ash content of the coal is
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a coal elemental detector, includes alloy frame (1), its characterized in that: alloy support columns (2) are arranged at four corners of the lower end of the alloy frame (1), an alloy base plate (3) is installed at the upper end of the alloy frame (1), a supporting plate (4) is longitudinally installed on the right side of the upper end face of the alloy base plate (3), a first mounting hole (5) is formed in the middle of the supporting plate (4), a plurality of second mounting holes (6) are formed in the periphery of the middle of the supporting plate (4), a collecting mirror main body (7) is arranged in an inserting mode in the second mounting hole (6) and is multiple, the collecting mirror main body (7) is distributed in an annular array mode with the center of the first mounting hole (5) as the middle point, a collecting mirror group (8) is embedded in the inner cavity of the collecting mirror main body (7), the collecting mirror group (8) is formed by coupling of two lenses, and the front focal length of the collecting mirror group (8) is equal to the number of the collecting mirror main body (7) The distance of department, the left side of gathering mirror main part (7) inner chamber is provided with mounting panel (9), the left end of mounting panel (9) is connected with multimode fiber bundle (10), the back focal length of gathering mirror group (8) equals gather mirror group (8) to the distance of multimode fiber bundle (10) left side port, the left side of multimode fiber bundle (10) is provided with optic fibre jumper (101), the right side of multimode fiber bundle (10) is provided with a plurality of single core optic fibre (102), the inside of first mounting hole (5) is inlayed and is equipped with mirror group sleeve (11), first beam expander (12), second beam expander (13) and focusing lens (14) are installed in proper order to the inner chamber of mirror group sleeve (11) from left to right, the left side of mirror group sleeve (11) is connected with high energy laser (15), the lower extreme of high energy laser (15) is provided with high adjusting device, the height adjusting device comprises a bottom mounting plate (16), the lower end of the bottom supporting plate (16) is mounted on the upper end face of the alloy bottom plate (3), linear bearings (17) are inserted into four corners of the bottom supporting plate (16), guide shafts (18) are longitudinally inserted into the linear bearings (2), the lower ends of the guide shafts (18) penetrate through the plate wall of the alloy bottom plate (3), guide shaft supports (19) are mounted at the upper ends of outer shaft rods of the guide shafts (18), a middle-load type lifting device (20) is mounted in the middle of the upper end face of the bottom mounting plate (16), limiting columns (21) are connected between adjacent end faces of front and rear side connecting rods of the middle-load type lifting device (20) in a pin mode, the number of the limiting columns (21) is two, the two limiting columns are connected to the left side and the right side of the middle connecting rod of the middle-load type lifting device (20) in a pin mode, and the middle portions of the limiting columns (21) on the, the radial hand wheel (23) is installed at the left end of the guide rod (22), the lifting plate (24) is installed at the upper end of the middle-load lifting device (20), the lower end face of the lifting plate (24) is installed at the upper end of the guide shaft support (19), and the high-precision spectrometer (25) is installed on the left side of the upper end face of the lifting plate (24).
2. The coal element detector according to claim 1, wherein: alloy frame (1), alloy pillar (2) and alloy bottom plate (3) are the carbide structure, just alloy frame's (1) lower terminal surface with thick type support (26) are all installed to the junction of alloy pillar (2), the upside of thick type support (26) is passed through the bolt fastening in alloy frame's (1) lower terminal surface, the downside of thick type support (26) is passed through the bolt fastening in the side of alloy pillar (2).
3. The coal element detector according to claim 1, wherein: the line segments between the focusing positions at the right ends of the collecting mirror main bodies (7) and the middle points of the mirror group sleeves (10) and the transverse straight lines where the middle points of the mirror group sleeves (10) are located are all on the same point straight line.
4. The coal element detector according to claim 1, wherein: the high-energy laser (15) adopts an Nd-Yag laser with pulse energy larger than 10 mJ, the diameter of a light spot is 1-15 mm, and the repetition frequency range is 1-200 Hz.
5. The coal element detector according to claim 1, wherein: first beam expander (12) are concave lens, second beam expander (13) are convex lens, just first beam expander (12) with second beam expander (13) make up into the galilean beam expander form.
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