CN207030972U - The system for preparing calcium carbide - Google Patents

Abstract

The utility model discloses the system for preparing calcium carbide, including：Sorting unit, it has feed coal entrance, low grey coal export and dirty coal outlet；Breaker, it has low culm entrance and the outlet of low culm particle；Palletizing device, it has low culm particle entrance, powdery quick lime entrance and the outlet of mixing pelletizing；First pyrolysis installation, it has mixing pelletizing entrance, the first pyrolysis oil gas vent and the outlet of carbonaceous active pelletizing；Gas-liquid separation device, it has the first pyrolysis oil gas entrance, pyrolysis oil export and pyrolysis gas outlet；Furnace of calcium carbide, it has carbonaceous active pelletizing entrance, calcium carbide outlet and calcium carbide tail gas outlet；Second pyrolysis installation.The sorting deliming of middle low order feed coal, pyrolysis can be combined with calcium carbide smelting technique using the system, significantly improve the thermal efficiency in prepared by calcium carbide, so as to solve the problems such as cost of material is high, powder is seriously polluted, high energy consumption in calcium carbide preparation.

Description

The system for preparing calcium carbide

Technical field

Derived energy chemical field is the utility model is related to, specifically, the utility model is related to the system for preparing calcium carbide.

Background technology

Calcium carbide, mainly for the production of acetylene and ethynylation chemical product, was once described as a kind of important industrial chemicals " mother of organic synthesis industry ".Consider from National energy distribution, " rich coal, oil-poor, few gas " is the typical case of China's energy resource structure Feature, coal are the main energy sources in China, account for the 70% of primary energy, and therefore, calcium carbide production is anticipated for Industrial Economic Development Justice is great.

Traditional calcium carbide production mainly uses electrothermal way, i.e., using lump lime and block coke as raw material, in furnace of calcium carbide Reaction equation CaO+3C=CaC is pressed under hot conditions₂+ CO smelts production calcium carbide.Consider from the requirement to carbon raw, tradition Calcium carbide production technology is primarily present following defect：(1) require the granularity of carbon materials in 5~30mm, fixed carbon content>84%th, Ash content<15%, it disclosure satisfy that only coke, semicoke, petroleum coke and some high-quality anthracites of these requirements, and these raw materials Reserves are extremely limited, expensive；(2) raw material with 15~20% is understood in raw material shattering process because granularity is less than 5mm And go out of use, cause the serious waste of resource；(3) block carbon raw material and lime, mass transfer and biography mainly are used in calcium carbide production The thermal efficiency is low, and reaction rate is relatively low, and furnace heat efficiency is only 50% or so, and power consumption is up to 3250kWh/t calcium carbides or so.It can be seen that The quality of carbon raw directly affects the economic indicators such as yield, quality, electric power unit consumption and the cost of calcium carbide.

In addition, in recent years, with the raising of Coal Mechanical recovery percent, particle diameter of the raw coal in recovery process is less Fine coal content accounts for 40~60%, and the poor low-order coal of hardness even accounts for 70% or so, and this is obviously produced with traditional calcium carbide Requirement of the granularity of technological requirement carbon raw more than 5mm is runed counter to.

Therefore, the existing means for preparing calcium carbide are still further improved.

Utility model content

The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality It is the system that proposition prepares calcium carbide with a new purpose.The sorting of middle low order feed coal can be taken off using the system Ash, pyrolysis is combined with calcium carbide smelting technique, significantly improve calcium carbide preparation in the thermal efficiency, so as to solve calcium carbide prepare in raw material into The problems such as this height, powder are seriously polluted, high energy consumption.

In one side of the present utility model, the utility model proposes a kind of system for preparing calcium carbide.According to this practicality New embodiment, the system include：Sorting unit, the sorting unit have feed coal entrance, low grey coal export and height ash Coal export；Breaker, the breaker have low culm entrance and the outlet of low culm particle, the low culm entrance and institute Low grey coal export is stated to be connected；Palletizing device, the palletizing device have low culm particle entrance, powdery quick lime entrance and mixing Pelletizing exports, and the low culm particle entrance is connected with the low culm particle outlet；First pyrolysis installation, first pyrolysis Device has mixing pelletizing entrance, the first pyrolysis oil gas vent and the outlet of carbonaceous active pelletizing, the mixing pelletizing entrance and institute The outlet of mixing pelletizing is stated to be connected；There is the first pyrolysis oil gas entrance, pyrolysis oil to go out for gas-liquid separation device, the gas-liquid separation device Mouth and pyrolysis gas outlet, the first pyrolysis oil gas entrance are connected with the described first pyrolysis oil gas vent；Furnace of calcium carbide, the calcium carbide Stove have carbonaceous active pelletizing entrance, calcium carbide outlet and calcium carbide tail gas outlet, the carbonaceous active pelletizing entrance with it is described carbon containing Active pelletizing outlet is connected；Second pyrolysis installation, second pyrolysis installation have dirty coal entrance, the second pyrolysis oil gas vent With upgrading coal export, the dirty coal entrance is connected with dirty coal outlet, and second pyrolysis installation also has pyrolysis gas Entrance, the pyrolysis gas entrance are connected with the pyrolysis gas outlet.

Divided according to the system for preparing calcium carbide of the utility model embodiment by sorting unit centering low order feed coal Choosing is handled, and to obtain low culm and dirty coal, and low culm is supplied into breaker and carries out break process, by what is obtained Low culm particle carries out mixed pelletizing with powdery quick lime in palletizing device, obtains mixing pelletizing, and then mixing pelletizing is supplied To the first pyrolysis processing is carried out into the first pyrolysis installation, further to remove the volatile matter in low culm, the first heat is obtained Oil gas and carbonaceous active pelletizing are solved, wherein first is pyrolyzed oil gas after gas-liquid separation device carries out gas-liquid separation processing, Ke Yifen Pyrolysis oil and pyrolysis gas are not obtained, and carbonaceous active pelletizing can supply to furnace of calcium carbide and carry out calcium carbide reaction, to obtain calcium carbide Product.Meanwhile dirty coal can be supplied and the second pyrolysis processing is carried out into the second pyrolysis installation, obtain upgraded coal and the second heat Oil gas is solved, and the gas in dirty coal pyrolytic process in the second pyrolysis installation is used as by the use of the pyrolysis gas that pelletizing is pyrolyzed to obtain is mixed Heat carrier, so as to while using pyrolysis gas sensible heat, additionally it is possible to using pyrolysis gas catalysis dirty coal pyrolysis, to improve dirty coal It is pyrolyzed the quality of obtained upgraded coal.Thus, the system of the present utility model for preparing calcium carbide passes through dividing middle low order feed coal Select deliming, pyrolysis to be combined with calcium carbide smelting technique, realize the sub-prime cascade utilization of middle low order feed coal, by the way that low culm is broken Material carries out mixed pelletizing with powdered lime stone, realizes the complete utilization of small particle coal charge, significantly reduces cost of material, and reduce Environmental pollution caused by powder, so as to solve the problems such as cost of material is high, powder is seriously polluted in calcium carbide preparation.

Optional, the sorting unit further comprises：Upper cavity, the top of the upper cavity have low grey coal export, There is feed coal entrance in the side wall of the upper cavity；Lower chamber, the top of the lower chamber and the bottom phase of the upper cavity Even, the bottom of the lower chamber has dirty coal outlet, and the side wall of the lower chamber is made up of the outer wall and inwall be arrangeding in parallel, The inwall includes connected upper inwall and lower inwall up and down, formed with the first air intake chamber between the outer wall and upper inwall, Opened between the outer wall and lower inwall formed with the second air intake chamber, the first air intake chamber and the second air-inlet cavity interventricular septum, Multiple air outlets are respectively provided with the upper inwall and the lower inwall；First intake stack, first intake stack are arranged on It is connected on the outer wall of the lower chamber and with the first air intake chamber；Second intake stack, second intake stack are set Put on the outer wall of the lower chamber and be connected with the second air intake chamber.

Optional, the upper cavity cross section from top to bottom gradually increases, and the side wall and vertical direction of the upper cavity Angle be 2.5~30 degree；The lower chamber cross section is from top to bottom gradually reduced, and the side wall of the lower chamber and vertical side To angle be 5~30 degree.Here situation is the angle of upper inwall and vertical direction and lower inwall and the angle of vertical direction Consistent situation.

Optional, the aperture of the multiple air outlet is 2~5mm, wherein, positioned at the multiple air-out of the upper inwall The gross area of mouth is the 10~30% of the upper inwall gross area.

Optional, the angle of the upper inwall and vertical direction is 0~15 degree；The angle of the lower inwall and vertical direction For 30~60 degree.Here situation is that the angle of the angle of upper inwall and vertical direction and lower inwall and vertical direction is inconsistent Situation.

It is optional, positioned at the multiple air outlet of the lower inwall the gross area for the lower inwall gross area 20~ 40%.

Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment Become obvious and be readily appreciated that, wherein：

Fig. 1 is the system structure diagram for preparing calcium carbide according to the utility model one embodiment；

Fig. 2 is the sorting unit cross-sectional view according to the utility model one embodiment；

Fig. 3 is the sorting unit cross-sectional view according to the utility model further embodiment；

Fig. 4 is the system structure diagram for preparing calcium carbide according to the utility model further embodiment；

Fig. 5 is the method flow signal that calcium carbide is prepared using the system for preparing calcium carbide of the utility model one embodiment Figure.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model Limitation.

In description of the present utility model, it is to be understood that term " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness Degree ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", etc. instruction Orientation or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of description the utility model and simplification Description, rather than the device or element of instruction or hint meaning must have specific orientation, with specific azimuth configuration and behaviour Make, therefore it is not intended that to limitation of the present utility model.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two It is individual, three etc., unless otherwise specifically defined.

In the utility model, unless otherwise clearly defined and limited, term " connected " should be interpreted broadly, for example, Can be fixedly connected or be detachably connected, or integrally；Can be mechanical connection or electrical connection；Can be with It is to be joined directly together, can also be indirectly connected by intermediary, can is connection or the phase of two elements of two element internals Interaction relation, limited unless otherwise clear and definite.For the ordinary skill in the art, can manage as the case may be Solve concrete meaning of the above-mentioned term in the utility model.

In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.

In one side of the present utility model, the utility model proposes a kind of system for preparing calcium carbide.According to this practicality New embodiment, with reference to figure 1~4, the system includes：Sorting unit 100, breaker 200, the heat of palletizing device 300, first Solve device 400, gas-liquid separation device 500, the pyrolysis installation 700 of furnace of calcium carbide 600 and second.Wherein, sorting unit 100 has raw material Coal entrance 101, low grey coal export 102 and dirty coal outlet 103；Breaker 200 has low culm entrance 201 and low culm broken Material outlet 202, low culm entrance 201 is connected with low grey coal export 102；Palletizing device 300 have low culm particle entrance 301, Powdery quick lime entrance 302 and mixing pelletizing outlet 303, low culm particle entrance 301 is connected with low culm particle outlet 202； There is first pyrolysis installation 400 mixing pelletizing entrance 401, first to be pyrolyzed oil gas vent 402 and carbonaceous active pelletizing outlet 403, Mixing pelletizing entrance 401 is connected with mixing pelletizing outlet 303；Gas-liquid separation device 500 have the first pyrolysis oil gas entrance 501, Oil export 502 and pyrolysis gas outlet 503 are pyrolyzed, the first pyrolysis oil gas entrance 501 is connected with the first pyrolysis oil gas vent 402；Electricity Stone stove 600 has carbonaceous active pelletizing entrance 601, calcium carbide outlet 602 and calcium carbide tail gas outlet 603, carbonaceous active pelletizing entrance 601 are connected with carbonaceous active pelletizing outlet 403；There is second pyrolysis installation 700 the pyrolysis oil gas of dirty coal entrance 701, second to go out Mouth 702 and upgrading coal export 703, dirty coal entrance 701 are connected with dirty coal outlet 103.

It is described in detail below with reference to Fig. 1~4 pair according to the system for preparing calcium carbide of the utility model embodiment：

According to embodiment of the present utility model, sorting unit 100 has feed coal entrance 101, low grey coal export 102 and height Grey coal export 103, sorting unit 100 is suitable to feed coal carrying out sorting process, to obtain low culm and dirty coal.Specifically Ground, due to the ash content (such as the impurity such as volatile matter, inorganic salts and oxide) in middle low order feed coal containing high level, it is difficult to Meet the requirement for preparing calcium carbide, carry out sorting process by using the advance centering low order feed coal of sorting unit, can incite somebody to action Low culm separates with dirty coal, carries out sub-prime cascade utilization, wherein low culm is used to prepare calcium carbide, dirty coal is used to pass through pyrolysis Upgrading prepares upgraded coal.

It should be noted that in system of the present utility model, term " high ash " and " low ash " they are not absolute probability, but The relative amount of ash content in relative concept, in particular to coal charge, in other words, above-mentioned " low culm " have relative to " dirty coal " Relatively low content of ashes, the specific content of ashes in above-mentioned " low culm " and " dirty coal " are not particularly limited.

The principle that low culm and dirty coal sorting are opened is by system of the present utility model, by the air intake for adjusting different air compartments Amount, can open the sorting substances of different densities, the size of air quantity directly influences the height of the material density sub-elected.Coal charge In ash content include the inorganic constituents such as silica, aluminum oxide, magnesia or iron oxide.The density of coal charge reflects the height of ash content Low, then density is different for content of ashes difference in coal charge, and then density is big for ash content height, and the low then density of ash content is small.Therefore, by this practicality The coal charge of different ash contents can be sub-elected dirty coal and low culm by new system.

When being sorted using system of the present utility model to coal charge, because coal charge type is different, outside its ash content into Divide also difference, therefore, for different types of coal charge, density also can be different when content of ashes is identical so that for different type Coal charge, to sub-elect the low culm of identical content of ashes, the intake of its air compartment is different.Therefore, it is possible to sub-elect phase Intake with the air compartment of the coal charge of content of ashes is difficult to define, it is necessary to be adjusted for specific coal charge.

According to a specific embodiment of the present utility model, content of ashes is less than or equal to 12wt% in low culm.

According to embodiment of the present utility model, with reference to figure 2~3, sorting unit 100 further comprises：Upper cavity 110, under Cavity 120, the first intake stack 170 and the second intake stack 180.

According to embodiment of the present utility model, the top of upper cavity 100 has low grey coal export 102, the side of upper cavity 110 There is feed coal entrance 101 on wall；The top of lower chamber 120 is connected with the bottom of upper cavity 110, the bottom tool of lower chamber 120 There is dirty coal to export 103, the side wall of lower chamber 120 is made up of the outer wall 130 and inwall 140 be arrangeding in parallel, and inwall 140 includes upper Connected upper inwall 141 and lower inwall 142 down, formed with the first air intake chamber 150, outer wall between outer wall 130 and upper inwall 141 It is spaced between 130 and lower inwall 142 formed with the second air intake chamber 160, the first air intake chamber 150 and the second air intake chamber 160 Open, multiple air outlet (not shown)s are respectively provided with upper inwall 141 and lower inwall 142；First intake stack 170 is arranged on down It is connected on the outer wall 130 of cavity 120 and with the first air intake chamber 150；Second intake stack 180 is arranged on lower chamber 120 It is connected on outer wall 130 and with the second air intake chamber 160.

According to embodiment of the present utility model, feed coal to be sorted enters lower chamber, air warp by feed coal entrance Flowmeter and first, second intake stack enter in the first air intake chamber and the second air intake chamber of sorting unit, and make second Air velocity in intake stack is more than the air velocity in the first intake stack, thus makes to form phase in lower chamber (separation chamber) To stable ascending air, regulation air mass flow to treat that sorting material is sorted in lower chamber under gravity, high Density granule sink enter dirty coal collecting region, by dirty coal export discharge, and low-density particles moved upwards with air-flow into Enter the low culm collecting region of upper cavity, discharged by low grey coal export, low culm and dirty coal are sorted so as to realize.

According to embodiment of the present utility model, the cross section of upper cavity 110 from top to bottom gradually increases, and upper cavity 110 The angle of side wall and vertical direction can be 2.5~30 degree；The cross section of lower chamber 120 is from top to bottom gradually reduced, and lower chamber 120 side wall and the angle of vertical direction can be 5~30 degree.

According to embodiment of the present utility model, the aperture of multiple air outlets can be 2~5mm, wherein, positioned at upper inwall The gross area of 141 multiple air outlets can be the 10~30% of the upper gross area of inwall 141.

According to one embodiment of the present utility model, with reference to figure 2, in lower chamber 120, upper inwall 141 and vertical direction shape Into angle and lower inwall 142 it is consistent with the angle that vertical direction is formed, i.e. the first air intake chamber 150 and the second air intake chamber 160 form a taper type.

According to embodiment of the present utility model, with reference to figure 3, lower chamber 120 can also use segmentation structure, specifically, According to embodiment of the present utility model, the angle of upper inwall 141 and vertical direction can be 0~15 degree；Lower inwall 142 with it is vertical The angle in direction can be 30~60 degree.Thus, it is possible to inwall is set to form segmental structure, the top of segmental structure with lower inwall (upper inwall) and height small with the angle of vertical direction is big, and bottom (lower inwall) is big with the angle of vertical direction and highly small. The angle of this bottom and vertical direction is big and highly small structure causes the air in the second air-inlet cavity room to enter by air distribution plate Caused horizontal wind speed is small after entering lower chamber, ascending air predominantly straight up, beneficial to the rising that stabilization is formed in bottom Air-flow；And the angle of top and vertical direction is small and highly big structure causes the air in the first air-inlet cavity room to pass through air distribution plate Caused horizontal wind speed opposing lower portions increase after into lower chamber, the wall effect of assorting room can be reduced；Therefore, this segmentation Structure not only improves to form stable ascending air, reduces influenceing for the wall effect that material movement process is subject to again, and then Improve the sharpness of separation of material.

According to a specific embodiment of the present utility model, the height of above-mentioned first air intake chamber in the vertical direction is not small In 1m, the height of above-mentioned second air intake chamber in the vertical direction is not less than 0.1m.

According to embodiment of the present utility model, the gross area positioned at multiple air outlets of lower inwall 142 can be lower inwall The 20~40% of 142 gross areas.Thus, it is possible to make the percent opening on lower inwall larger relative to upper inwall, with reference to the device Grading principle, air form metastable ascending air in lower chamber so that material is mainly real under ascending air effect Now press density separation.To form the ascending air that stable satisfaction sorting requires, the air quantity that lower chamber bottom needs is larger, suitably Increase percent opening can advantageously form stable ascending air, and then improve the sharpness of separation of material.

According to embodiment of the present utility model, there is breaker 200 low culm entrance 201 and low culm particle to export 202, low culm entrance 201 is connected with low grey coal export 102, and breaker 200 is suitable to low culm carrying out break process, so as to Obtain low culm particle.Specifically, by the way that the coal charge of low particle diameter is broken for into low culm particle, follow-up pelletizing can be significantly improved The contact area of low culm and quick lime in forming processes, so as to improve the utilization rate of low culm.

According to embodiment of the present utility model, the Average Particle Diameters of low culm particle directly influence follow-up mixed-forming The molding effect of processing, according to a specific embodiment of the present utility model, low culm can be crushed to average grain diameter for 1.0 Millimeter.Thus, it is possible to the contact area of low culm particle and quick lime in follow-up mixed-forming processing is further improved, so as to enter One step improves the utilization rate of low culm.

According to embodiment of the present utility model, there is palletizing device 300 low culm particle entrance 301, powdery quick lime to enter Mouth 302 and mixing pelletizing outlet 303, low culm particle entrance 301 is connected with low culm particle outlet 202, and palletizing device 300 is fitted In low culm particle and powdery quick lime are carried out into mixed pelletizing, to obtain mixing pelletizing.Inventor has found in an experiment, The too small coal charge of particle diameter is difficult to react in furnace of calcium carbide, and obtains mixing pelletizing by mixed pelletizing, can effectively carry The utilization rate of high small particle coal charge, so as to reduce cost of material.In embodiment of the present utility model, the mixing pelletizing after shaping can Think ellipsoid group, the size of ellipsoid group has an impact to follow-up pyrolysis processing effect, and block is chosen in the utility model embodiment Size is：Length × width × height=(28~38mm) × (20~30mm) × (13~23mm).

According to embodiment of the present utility model, the first pyrolysis installation 400 has mixing pelletizing entrance 401, the first pyrolysis oil Gas outlet 402 and carbonaceous active pelletizing outlet 403, mixing pelletizing entrance 401 are connected with mixing pelletizing outlet 303, the first pyrolysis Device 400 is suitable to mixing pelletizing carrying out the first pyrolysis processing, to obtain carbonaceous active pelletizing and the first pyrolysis oil gas.Invention People has found that the pyrolysis of quick lime centering low order coal charge has catalytic action, before calcium carbide reaction is carried out, in advance to mixing pelletizing The first pyrolysis processing is carried out, the volatile matter in can effectively removing in low order feed coal, is obtained containing light pyrolysis oil and richness First pyrolysis gas mixture of hydrogen pyrolysis gas, so as to improve the carbon content in coal charge, to improve the electricity being subsequently prepared The yield and quality of stone.

According to specific embodiment of the utility model, the first pyrolysis processing can be carried out under 500~1000 degrees Celsius, by This can effectively be pyrolyzed the volatile matter in low order coal charge in removing, improve reaction of the mixing pelletizing in the reaction of follow-up calcium carbide and live Property.

According to a specific embodiment of the present utility model, time that the first pyrolysis processing is carried out can be 20~ 120min, thus, it is possible to further improve the completeness to mixing pelletizing pyrolysis.

According to embodiment of the present utility model, gas-liquid separation device 500 has the first pyrolysis oil gas entrance 501, pyrolysis oil Outlet 502 and pyrolysis gas outlet 503, the first pyrolysis oil gas entrance 501 are connected with the first pyrolysis oil gas vent 402, gas-liquid separation Device 500 is suitable to the first pyrolysis oil gas carrying out gas-liquid separation processing, to obtain pyrolysis oil and pyrolysis gas.Specifically, first Substantial amounts of sensible heat is carried in the first pyrolysis oil gas that pyrolysis processing obtains, the follow-up conduct of hydrogen-rich pyrolysis gas obtained through gas-liquid separation Gas heat carrier is used for the pyrolysis of dirty coal, so as to both take full advantage of the sensible heat of pyrolysis gas, while utilizes the richness in pyrolysis gas Hydrogen component, it is possible to increase the quality of dirty coal pyrolysis product, not only reduce energy consumption, also improve the economic benefit of product.

According to embodiment of the present utility model, there is furnace of calcium carbide 600 carbonaceous active pelletizing entrance 601, calcium carbide to export 602 and Calcium carbide tail gas outlet 603, carbonaceous active pelletizing entrance 601 are connected with carbonaceous active pelletizing outlet 403, and furnace of calcium carbide 600 is suitable to profit Calcium carbide reaction is carried out with carbonaceous active pelletizing, to obtain calcium carbide and calcium carbide tail gas.

According to specific embodiment of the utility model, calcium carbide reaction can be carried out under 1300~2400 degrees Celsius, thus The yield and quality for the calcium carbide product being prepared can be significantly improved.

According to embodiment of the present utility model, there is the second pyrolysis installation 700 dirty coal entrance 701, second to be pyrolyzed oil gas Outlet 702 and upgrading coal export 703, dirty coal entrance 701 are connected with dirty coal outlet 103, and the second pyrolysis installation 700 is suitable to will Dirty coal carries out the second pyrolysis processing under 400~1100 degrees Celsius, to obtain upgraded coal and the second pyrolysis oil gas.Wherein, Upgraded coal may be used as gasified raw material or thermal power generation raw material in other techniques.

According to specific embodiment of the utility model, the second pyrolysis processing can be carried out under 400~1100 degrees Celsius, Completed in 3~20 seconds.Inventor has found, is handled in the range of this temperature and pyrolysis rate, can effectively remove coal charge In volatile matter, obtain upgraded coal and second pyrolysis oil gas.

According to embodiment of the present utility model, with reference to figure 4, the second pyrolysis installation 700 also has pyrolysis gas entrance 704, heat Entrance 704 of venting one's spleen is connected with pyrolysis gas outlet 503, thus, it is possible to carried using mixing in the pyrolysis gas that pelletizing is pyrolyzed to obtain A large amount of sensible heats, the hydrogen-rich pyrolysis gas obtained through gas-liquid separation is subsequently used for the pyrolysis of dirty coal as gas heat carrier, so as to both The sensible heat of pyrolysis gas is taken full advantage of, while the product of dirty coal pyrolysis product can be improved using the hydrogen-rich component in pyrolysis gas Matter, energy consumption is not only reduced, also improve the economic benefit of product.

Divided according to the system for preparing calcium carbide of the utility model embodiment by sorting unit centering low order feed coal Choosing is handled, and to obtain low culm and dirty coal, and low culm is supplied into breaker and carries out break process, by what is obtained Low culm particle carries out mixed pelletizing with powdery quick lime in palletizing device, obtains mixing pelletizing, and then mixing pelletizing is supplied To the first pyrolysis processing is carried out into the first pyrolysis installation, further to remove the volatile matter in low culm, the first heat is obtained Oil gas and carbonaceous active pelletizing are solved, wherein first is pyrolyzed oil gas after gas-liquid separation device carries out gas-liquid separation processing, Ke Yifen Pyrolysis oil and pyrolysis gas are not obtained, and carbonaceous active pelletizing can supply to furnace of calcium carbide and carry out calcium carbide reaction, to obtain calcium carbide Product.In addition, the second pyrolysis installation that the dirty coal that middle low order feed coal sorts to obtain can enter carries out the second pyrolysis processing, To obtain upgraded coal and the second pyrolysis oil gas, and the second pyrolysis processing can utilize and mix the pyrolysis gas that pelletizing is pyrolyzed to obtain Sensible heat, so as to further reducing energy consumption.Thus, the system of the present utility model for preparing calcium carbide is by by middle low order feed coal Sorting deliming, pyrolysis are combined with calcium carbide smelting technique, realize the sub-prime cascade utilization of middle low order feed coal, by by low culm Particle carries out mixed pelletizing with powdered lime stone, realizes the complete utilization of small particle coal charge, significantly reduces cost of material, and subtract Environmental pollution caused by having lacked powder, so as to solve the problems such as cost of material is high, powder is seriously polluted in calcium carbide preparation.

In order to facilitate understanding, below with reference to Fig. 5 to preparing electricity using the system for preparing calcium carbide of the utility model embodiment The method of stone is described in detail.According to embodiment of the present utility model, this method includes：

S100：Sorting process

In the step, feed coal is supplied into sorting unit and carries out sorting process, to obtain low culm and dirty coal. Specifically, due to the ash content (such as the impurity such as volatile matter, inorganic salts and oxide) in middle low order feed coal containing high level, It is difficult to meet to be used for the requirement for preparing calcium carbide, sorting process is carried out by using the advance centering low order feed coal of sorting unit, can So that low culm to be separated with dirty coal, sub-prime cascade utilization is carried out, wherein low culm is used to prepare calcium carbide, dirty coal is used to pass through It is pyrolyzed upgrading and prepares upgraded coal.

In method of the present utility model, the content of ashes of low culm is limited to less than or equal to 12wt%, be because：Coal Ash content in material is mainly the inorganic constituents such as silica, aluminum oxide, magnesia or iron oxide, and content of ashes is too high, then can be serious The performance of furnace of calcium carbide is influenceed, the blast of furnace of calcium carbide can be triggered, produce fatal consequence, it then becomes necessary to control coal in furnace of calcium carbide The ash content of material, applicant's empirical discovery, the content of ashes of coal charge is limited to less than or equal to 12wt%, furnace of calcium carbide can be ensured Performance it is unaffected, in safe range.By separation system of the present utility model can sub-elect content of ashes be less than or Low culm equal to 12wt%, and then ensure the safe and smooth production of follow-up calcium carbide.

According to embodiment of the present utility model, sorting unit further comprises：Upper cavity, lower chamber, the first intake stack With the second intake stack.

According to embodiment of the present utility model, the top of upper cavity has low grey coal export, has in the side wall of upper cavity Dry coal particle entrance；The top of lower chamber is connected with the bottom of upper cavity, and the bottom of lower chamber has dirty coal outlet, under The side wall of cavity is made up of the outer wall and inwall be arrangeding in parallel, and inwall includes connected upper inwall and lower inwall up and down, outer wall and Formed with the first air intake chamber between upper inwall, formed with the second air intake chamber, the first air intake chamber between outer wall and lower inwall Opened with the second air-inlet cavity interventricular septum, multiple air outlets are respectively provided with upper inwall and lower inwall；First intake stack is arranged on cavity of resorption It is connected on the outer wall of body and with the first air intake chamber；Second intake stack be arranged on the outer wall of lower chamber and with the second air intake Chamber is connected.

According to embodiment of the present utility model, drying coal particle to be sorted is by drying under the entrance of coal particle entrance Cavity, air enter the first air intake chamber and the second air intake chamber of sorting unit through flowmeter and first, second intake stack In, and the air velocity in the second intake stack is more than the air velocity in the first intake stack, thus make lower chamber (sorting Room) in form metastable ascending air, regulation air mass flow to treat sorting material under gravity in lower chamber Sorted, high density granular sinks to entering dirty coal collecting region, is exported and discharged by dirty coal, and low-density particles are with air-flow The low culm collecting region of upper cavity is moved into upwards, is discharged by low grey coal export, so as to realize to low culm and dirty coal progress Sorting.

According to embodiment of the present utility model, upper cavity cross section from top to bottom gradually increases, and the side wall of upper cavity with The angle of vertical direction can be 2.5~30 degree；Lower chamber cross section is from top to bottom gradually reduced, and the side wall of lower chamber is with erecting Nogata to angle can be 5~30 degree.

According to embodiment of the present utility model, the aperture of multiple air outlets can be 2~5mm, wherein, positioned at upper inwall The gross area of multiple air outlets can be the 10~30% of the upper inwall gross area.

According to one embodiment of the present utility model, in lower chamber, angle that upper inwall is formed with vertical direction and lower interior Wall is consistent with the angle that vertical direction is formed, i.e. the first air intake chamber and the second air intake chamber form a taper type.

According to embodiment of the present utility model, lower chamber can also use segmentation structure, specifically, new according to this practicality The embodiment of type, the angle of upper inwall and vertical direction can be 0~15 degree；The angle of lower inwall and vertical direction can be 30 ~60 degree.Thus, it is possible to inwall is set to form segmental structure, the top (upper inwall) of segmental structure and vertical direction with lower inwall Angle it is small and height is big, and bottom (lower inwall) is big with the angle of vertical direction and highly small.This bottom and vertical direction Angle is big and highly small structure causes air in the second air-inlet cavity room to enter caused water after lower chamber by air distribution plate Flat wind speed is small, ascending air predominantly straight up, beneficial to the ascending air that stabilization is formed in bottom；And top and vertical side To caused by angle is small and highly big structure make it that air in the first air-inlet cavity room entered after lower chamber by air distribution plate Horizontal wind speed opposing lower portions increase, and can reduce the wall effect of assorting room；Therefore, this segmental structure not only improves to be formed surely Fixed ascending air, reduce influenceing for the wall effect that material movement process is subject to again, and then improve the sharpness of separation of material.

According to a specific embodiment of the present utility model, the height of above-mentioned first air intake chamber in the vertical direction is not small In 1m, the height of above-mentioned second air intake chamber in the vertical direction is not less than 0.1m.

According to embodiment of the present utility model, the gross area positioned at multiple air outlets of lower inwall can be the total face of lower inwall Long-pending 20~40%.Thus, it is possible to make the percent opening on lower inwall larger relative to upper inwall, the sorting with reference to the device is former Reason, air form metastable ascending air in lower chamber so that material is mainly realized by close under ascending air effect Degree sorting.To form the ascending air that stable satisfaction sorting requires, the air quantity that lower chamber bottom needs is larger, and appropriate increase is opened Porosity can advantageously form stable ascending air, and then improve the sharpness of separation of material.

S200：Break process

In the step, low culm is supplied into breaker and carries out break process, to obtain low culm particle.Specifically Ground, by the way that the coal charge of low particle diameter is broken for into low culm particle, can significantly improve in follow-up pelletizing forming processes low culm with The contact area of quick lime, so as to improve the utilization rate of low culm.

According to embodiment of the present utility model, the Average Particle Diameters of low culm particle directly influence follow-up mixed-forming The molding effect of processing, according to a specific embodiment of the present utility model, low culm can be crushed to average grain diameter for 1.0 Millimeter.Thus, it is possible to the contact area of low culm particle and quick lime in follow-up mixed-forming processing is further improved, so as to enter One step improves the utilization rate of low culm.

S300：Mixed pelletizing

In the step, low culm particle and powdery quick lime are supplied into palletizing device and carry out mixed pelletizing, so as to To mixing pelletizing.Inventor has found in an experiment, is difficult to react in furnace of calcium carbide in the too small coal charge of particle diameter, and by mixed Close pelletizing to obtain mixing pelletizing, the utilization rate of small particle coal charge can be effectively improved, so as to reduce cost of material.This practicality is new In the embodiment of type, the mixing pelletizing after shaping can be ellipsoid group, and the size of ellipsoid group has to follow-up pyrolysis processing effect Influence, block size is chosen in the utility model embodiment is：Length × width × height=(28~38mm) × (20~30mm) × (13 ~23mm).

S400：First pyrolysis processing

In the step, mixing pelletizing is supplied the first pyrolysis processing is carried out into the first pyrolysis installation, it is carbon containing to obtain Active pelletizing and the first pyrolysis oil gas.Inventor has found that the pyrolysis of quick lime centering low order coal charge has catalytic action, carried out Before calcium carbide reaction, the first pyrolysis processing, waving in low order feed coal in can effectively removing are carried out to mixing pelletizing in advance Hair point, the first pyrolysis gas mixture containing light pyrolysis oil and hydrogen-rich pyrolysis gas is obtained, so as to which the carbon improved in coal charge contains Amount, to improve the yield and quality for the calcium carbide being subsequently prepared.

According to specific embodiment of the utility model, the first pyrolysis processing can be carried out under 500~1000 degrees Celsius, by This can effectively be pyrolyzed the volatile matter in low order coal charge in removing, improve reaction of the mixing pelletizing in the reaction of follow-up calcium carbide and live Property.

According to a specific embodiment of the present utility model, time that the first pyrolysis processing is carried out can be 20~ 120min, thus, it is possible to further improve the completeness to mixing pelletizing pyrolysis.

S500：Gas-liquid separation is handled

In the step, the first pyrolysis oil gas is supplied into gas-liquid separation device and carries out gas-liquid separation processing, to obtain Pyrolysis oil and pyrolysis gas.Specifically, substantial amounts of sensible heat is carried in the first pyrolysis oil gas that the first pyrolysis processing obtains, through gas-liquid point Subsequently it is used for the pyrolysis of dirty coal as gas heat carrier from obtained hydrogen-rich pyrolysis gas, so as to both take full advantage of pyrolysis gas Sensible heat, while the quality of dirty coal pyrolysis product can be improved using the hydrogen-rich component in pyrolysis gas, energy consumption is not only reduced, also Improve the economic benefit of product.

S600：Calcium carbide reacts

In the step, carbonaceous active pelletizing is supplied into furnace of calcium carbide and carries out calcium carbide reaction, to obtain calcium carbide and calcium carbide Tail gas.

According to specific embodiment of the utility model, calcium carbide reaction can be carried out under 1300~2400 degrees Celsius, thus The yield and quality for the calcium carbide product being prepared can be significantly improved.

S700：Second pyrolysis processing

In the step, dirty coal is supplied the second pyrolysis processing is carried out into the second pyrolysis installation, to obtain upgraded coal With the second pyrolysis oil gas.Wherein, upgraded coal may be used as the gasified raw material or thermal power generation raw material in other techniques.

According to specific embodiment of the utility model, the second pyrolysis processing can be carried out under 400~1100 degrees Celsius, Completed in 3~20 seconds.Inventor has found, is handled in the range of this temperature and pyrolysis rate, can effectively remove coal charge In volatile matter, obtain upgraded coal and second pyrolysis oil gas.

According to embodiment of the present utility model, the pyrolysis gas obtained during can gas-liquid separation be handled is supplied to the second pyrolysis In device, to carry out the second pyrolysis processing using the sensible heat of pyrolysis gas.The hydrogen-rich pyrolysis gas specifically obtained through gas-liquid separation The pyrolysis of dirty coal can be used for as gas heat carrier, so as to both take full advantage of the sensible heat of pyrolysis gas, while utilize pyrolysis Hydrogen-rich component in gas can improve the quality of dirty coal pyrolysis product, not only reduce energy consumption, also improve the economy of product Benefit.

Entered according to the method for preparing calcium carbide of the utility model embodiment by using sorting unit centering low order feed coal Row sorting process, to obtain low culm and dirty coal, and low culm is supplied into breaker and carries out break process, will To low culm particle and powdery quick lime mixed pelletizing is carried out in palletizing device, obtain mixing pelletizing, and then ball will be mixed Group's supply carries out the first pyrolysis processing into the first pyrolysis installation, further to remove the volatile matter in low culm, obtains the One pyrolysis oil gas and carbonaceous active pelletizing, wherein first is pyrolyzed oil gas after gas-liquid separation device carries out gas-liquid separation processing, can To respectively obtain pyrolysis oil and pyrolysis gas, and carbonaceous active pelletizing can supply to furnace of calcium carbide and carry out calcium carbide reaction, to obtain Calcium carbide product.In addition, the second pyrolysis installation that the dirty coal that middle low order feed coal sorts to obtain can enter carries out the second pyrolysis Processing, to obtain upgraded coal and the second pyrolysis oil gas, and the second pyrolysis processing can be pyrolyzed what is obtained using pelletizing is mixed The sensible heat of pyrolysis gas, so as to further reduce energy consumption.Thus, the method for the present utility model for preparing calcium carbide passes through middle low order is former Expect that the sorting deliming of coal, pyrolysis are combined with calcium carbide smelting technique, realize the sub-prime cascade utilization of middle low order feed coal, pass through by Low culm particle and powdered lime stone carry out mixed pelletizing, realize the complete utilization of small particle coal charge, significantly reduce raw material into This, and reduces environmental pollution caused by powder, is asked so as to solve in calcium carbide preparation that cost of material is high, powder is seriously polluted etc. Topic.

The sub-prime of coal charge of the present utility model utilizes system and method, is smelted using by the deliming of coal charge, pyrolysis and calcium carbide Technology couples, and reduces cost of material, reduces environmental pollution, meanwhile, improve the effective rate of utilization and conversion ratio of coal charge.Coal charge passes through It is pyrolyzed again after drop ash processing, calcium carbide metallurgy can improve pyrolysis, the effective treating capacity of calcium carbide smelting unit, raising product Quality, while reduce system energy consumption.

The utility model, by be pyrolyzed, prepare in pelletizing before calcium carbide pyroreaction sorting process is carried out to coal charge can be with Improve the quality for the acetylene that the calcium carbide is prepared.

Below with reference to specific embodiment, the utility model is described, it is necessary to which explanation is, these embodiments are only Descriptive, without limiting the utility model in any way.

Embodiment

Calcium carbide is prepared in following manner：

(1) feed coal is supplied into sorting unit and carries out sorting process, to obtain low culm and dirty coal；

(2) low culm is supplied into breaker and carries out break process, to obtain low culm particle；

(3) low culm particle and powdery quick lime are supplied into palletizing device and carries out mixed pelletizing, to be mixed Pelletizing；

(4) mixing pelletizing is supplied and the first pyrolysis processing is carried out into the first pyrolysis installation, to obtain carbonaceous active ball Group and the first pyrolysis oil gas；

(5) the first pyrolysis oil gas is supplied into gas-liquid separation device and carries out gas-liquid separation processing, to obtain pyrolysis oil And pyrolysis gas；

(6) carbonaceous active pelletizing is supplied into furnace of calcium carbide and carries out calcium carbide reaction, to obtain calcium carbide and calcium carbide tail gas；

(7) dirty coal is supplied and the second pyrolysis processing is carried out into the second pyrolysis installation, to obtain upgraded coal and second It is pyrolyzed oil gas；

(8) pyrolysis gas is supplied into the second pyrolysis installation, to carry out the second pyrolysis processing using the sensible heat of pyrolysis gas.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered Row combines and combination.

Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims (6)

1. A kind of 1. system for preparing calcium carbide, it is characterised in that including：

   Sorting unit, the sorting unit have feed coal entrance, low grey coal export and dirty coal outlet；

   Breaker, the breaker have low culm entrance and low culm particle outlet, the low culm entrance with it is described Low grey coal export is connected；

   Palletizing device, the palletizing device has low culm particle entrance, powdery quick lime entrance and the outlet of mixing pelletizing, described Low culm particle entrance is connected with the low culm particle outlet；

   First pyrolysis installation, first pyrolysis installation have mixing pelletizing entrance, the first pyrolysis oil gas vent and carbonaceous active Pelletizing exports, and the mixing pelletizing entrance is connected with the mixing pelletizing outlet；

   Gas-liquid separation device, the gas-liquid separation device have the first pyrolysis oil gas entrance, pyrolysis oil export and pyrolysis gas outlet, The first pyrolysis oil gas entrance is connected with the described first pyrolysis oil gas vent；

   Furnace of calcium carbide, the furnace of calcium carbide have carbonaceous active pelletizing entrance, calcium carbide outlet and calcium carbide tail gas outlet, the carbonaceous active Pelletizing entrance is connected with carbonaceous active pelletizing outlet；

   Second pyrolysis installation, second pyrolysis installation have dirty coal entrance, the second pyrolysis oil gas vent and upgrading coal export, The dirty coal entrance is connected with dirty coal outlet, and second pyrolysis installation also has pyrolysis gas entrance, the pyrolysis Gas entrance is connected with the pyrolysis gas outlet.
2. 2. the system according to claim 1 for preparing calcium carbide, it is characterised in that the sorting unit further comprises：

   Upper cavity, the top of the upper cavity have low grey coal export, have feed coal entrance in the side wall of the upper cavity；

   Lower chamber, the top of the lower chamber are connected with the bottom of the upper cavity, and the bottom of the lower chamber has dirty coal Outlet, the side wall of the lower chamber are made up of the outer wall and inwall be arrangeding in parallel, and the inwall includes upper inwall connected up and down With lower inwall, formed with the first air intake chamber between the outer wall and upper inwall, formed between the outer wall and lower inwall Two air intake chambers, the first air intake chamber and the second air-inlet cavity interventricular septum are opened, and are had on the upper inwall and the lower inwall There are multiple air outlets；

   First intake stack, first intake stack be arranged on the outer wall of the lower chamber and with the first air intake chamber It is connected；

   Second intake stack, second intake stack be arranged on the outer wall of the lower chamber and with the second air intake chamber It is connected.
3. 3. the system according to claim 2 for preparing calcium carbide, it is characterised in that the upper cavity cross section from top to bottom by It is cumulative big, and the side wall of the upper cavity and the angle of vertical direction are 2.5~30 degree；The lower chamber cross section is from top to bottom It is gradually reduced, and the side wall of the lower chamber and the angle of vertical direction are 5~30 degree.
4. 4. the system according to claim 2 for preparing calcium carbide, it is characterised in that the aperture of the multiple air outlet be 2~ 5mm, wherein, the gross area positioned at the multiple air outlet of the upper inwall is the 10~30% of the upper inwall gross area.
5. 5. the system according to claim 2 for preparing calcium carbide, it is characterised in that the angle of the upper inwall and vertical direction For 0~15 degree；The angle of the lower inwall and vertical direction is 30~60 degree.
6. 6. the system according to claim 2 for preparing calcium carbide, it is characterised in that positioned at the lower inwall it is the multiple go out The gross area in air port is the 20~40% of the lower inwall gross area.