CN206886689U - A kind of system for producing calcium carbide for removing magnesia - Google Patents
A kind of system for producing calcium carbide for removing magnesia Download PDFInfo
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- CN206886689U CN206886689U CN201720620468.XU CN201720620468U CN206886689U CN 206886689 U CN206886689 U CN 206886689U CN 201720620468 U CN201720620468 U CN 201720620468U CN 206886689 U CN206886689 U CN 206886689U
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- calcium carbide
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- calcium
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Abstract
The utility model discloses a kind of system for producing calcium carbide for removing magnesia, and the system includes pyrolysis oven, furnace of calcium carbide, flue and adsorbent equipment；Furnace of calcium carbide includes body of heater, feed pipe and blast pipe；The inner chamber of body of heater includes thermosphere area, and when furnace of calcium carbide works, the temperature in thermosphere area is 1400~1600 DEG C；Blast pipe is located at thermosphere area, and blast pipe passes through the side wall and ft connection of body of heater；The feed pipe of the solid matter outlet connection furnace of calcium carbide of pyrolysis oven, the inlet exhaust gas of the gas outlet connection flue of the blast pipe of furnace of calcium carbide, the smoke inlet of the exhanst gas outlet connection adsorbent equipment of flue.The system of production calcium carbide of the present utility model, is arranged on thermosphere area by the blast pipe of furnace of calcium carbide, avoids the oxidation of magnesium vapor, by the use of the High Temperature Gas after adsorption and oxidation magnesium as the thermal source of pyrolytic reaction, saved production cost, reduced energy consumption.
Description
Technical field
The utility model belongs to technical field of calcium carbide production, more particularly to a kind of system for producing calcium carbide for removing magnesia.
Background technology
Calcium carbide is a kind of important industrial chemicals, and in the production process of calcium carbide, the impurity in raw material is tight to Influence of production
Weight.Impurity in raw material mainly includes magnesia, silica, iron oxide, aluminum oxide etc., when furnace charge generates carbon in electric reaction in furnace
While changing calcium, various impurity are also reacted.
The reaction of various impurity not only consumes electric energy and carbon materials, and influences operation, destroys furnace bottom, particularly magnesia and exists
Melting zone is reduced into rapidly magnesium metal, and melting zone is turned into a strong high temperature reduction area, and magnesium vapor is red-hot from this
When region largely escapes, a portion magnesium reacts immediately with carbon monoxide, and generation magnesia releases heat-flash and forms high temperature, office
Portion's duricrust is destroyed, and the liquid calcium carbide with impurity is corroded furnace bottom.
In calcium carbide production process, when being reacted after the magnesium cooling of generation with oxygen, substantial amounts of heat is released, charge level caking is hindered stove
Gas is discharged, and produces branch current.Local furnace shell is also destroyed, or even is destroyed molten Candle-stub, blocks calcium carbide flow export.Practice card
Bright, content of magnesia often increases by 1% in lime, then power gas forming amount will decline 10~15L/kWh.Also partial oxidation magnesium exists
Melting zone reacts with nitrogen, the magnesium nitride (Mg of generation3N2), make calcium carbide tacky, cause difficulty of coming out of the stove, influence normally to produce.More have very
Person, it might have the generation for material phenomenon of collapsing.
Utility model content
In order to solve the above problems, the utility model proposes it is a kind of can remove magnesia in calcium carbide production process be
System, the blast pipe of furnace of calcium carbide is arranged in the side wall in thermosphere area, effectively avoids the oxidation reaction of magnesium in stove, improves production effect
Rate, while obtain high value-added product.
The utility model provides a kind of system for producing calcium carbide for removing magnesia, including pyrolysis oven, furnace of calcium carbide, flue and suction
Adsorption device；
The pyrolysis oven includes spherical material entrance and solid matter outlet；
The furnace of calcium carbide includes body of heater, feed pipe and blast pipe；The inner chamber of the body of heater includes thermosphere area, the furnace of calcium carbide
During work, the temperature in the thermosphere area is 1400~1600 DEG C；The feed pipe at the top of the body of heater by being deep into the stove
The inner chamber of body；The blast pipe is located at the thermosphere area, and the blast pipe passes through the side wall and ft connection of the body of heater；It is described
Blast pipe includes baffle plate, the inclined air inlet for being fixed on the blast pipe of the baffle plate；
The flue includes inlet exhaust gas and exhanst gas outlet；
The adsorbent equipment includes smoke inlet；
The solid matter outlet of the pyrolysis oven connects the feed pipe of the furnace of calcium carbide, and the blast pipe of the furnace of calcium carbide goes out
Gas port connects the inlet exhaust gas of the flue, the smoke inlet of the exhanst gas outlet connection adsorbent equipment of the flue.
Further, system of the present utility model includes pretreatment unit, and the pretreatment unit includes drying device, roasting
Burn device and palletizing device；
The drying device includes raw coal entrance and pelletizing raw coal exports；
The calciner includes calcium based raw material entrance and pelletizing calcium material exports；
The palletizing device includes pelletizing raw coal entrance, pelletizing calcium material entrance and the outlet of spherical material；
The pelletizing raw coal outlet of the drying device connects the pelletizing raw coal entrance of the palletizing device, the calciner
The outlet of pelletizing calcium material connect the pelletizing calcium material entrance of the palletizing device, described in the spherical material outlet connection of the palletizing device
The spherical material entrance of pyrolysis oven.
As the preferable scheme of the utility model, the adsorbent equipment also includes High Temperature Gas and exported, and the pyrolysis oven includes
High Temperature Gas entrance, the High Temperature Gas outlet of the adsorbent equipment connect the High Temperature Gas entrance of the pyrolysis oven.
As the preferable scheme of the utility model, the baffle plate of the blast pipe and the angle of horizontal direction are 30~60 °.
Preferably, the pyrolysis oven also includes the pyrolysis oil gas vent at the top of the pyrolysis oven.
Another object of the present utility model is to provide a kind of method that calcium carbide is produced using said system, including following step
Suddenly：
A, spherical material is sent into pyrolysis oven, pyrolytic reaction occurs, obtain solid material；
B, the solid material is sent into furnace of calcium carbide, is heated to 2100~2300 DEG C, generate calcium carbide and the tail containing magnesium vapor
Gas；
C, the tail gas containing magnesium vapor is discharged into the furnace of calcium carbide by blast pipe, then cooled down by flue, occurred
Oxidation reaction, generate the flue gas containing magnesia；
D, the flue gas is sent into adsorbent equipment, absorptive collection magnesia, discharges remaining High Temperature Gas, the temperature of High Temperature Gas
Reach 1000-1200 DEG C.
Further, pyrolysis reaction temperature is 500-900 DEG C, preferably 600-800 DEG C.
As preferable scheme, step is included before step A：Raw coal is dried, obtains pelletizing raw coal；By calcium base
Raw material is calcined, and obtains pelletizing calcium material；Pelletizing after the pelletizing raw coal and pelletizing calcium material are mixed, obtains spherical material.
Specifically, the calcium based raw material includes the one or more in lime, lime stone, white lime and carbide slag.
Further, method of the present utility model also includes step：The High Temperature Gas is sent into the pyrolysis oven, as heat
Solve the thermal source of reaction.
Further, the pyrolytic reaction of the step A also generates pyrolysis oil gas, by being pyrolyzed described in oil gas vent collection
It is pyrolyzed oil gas.
Shaping rear profile ball is sent into pyrolysis unit, type ball is warming up to 500~900 DEG C using high temperature calcium carbide stove exhaust as thermal source
Generation pyrolytic reaction, 500~900 DEG C of high-temp solid products of output, while the pyrolysis gas and tar of by-product high added value, pyrolysis gas
Combustion gas or material gas can be used as, tar can be sold as product or deep processing raw material, and high-temp solid product is heat-fed to calcium carbide smelting
Refine unit.
The system for producing calcium carbide of removing magnesia provided by the utility model, blast pipe is arranged on to the thermosphere of furnace of calcium carbide
Area, the temperature range in thermosphere area can ensure that with CO oxidation reaction does not occur for the magnesium vapor in tail gas, avoid charge level caking and
Collapse the generation of material；Baffle plate is provided with the tube wall of the air inlet of blast pipe, partial cavity can be formed in the bed of material, tail gas is pooled to
In cavity, it is easy to discharge after collecting；Using dust-removal cloth-bag adsorption and oxidation magnesium, high added value byproduct can be obtained；It is anti-due to being pyrolyzed
It is 500-900 DEG C to answer temperature, reaches 1000-1200 DEG C from the temperature of the high-temperature gas of adsorbent equipment discharge, therefore the utility model
The remaining High Temperature Gas of adsorption and oxidation magnesium is used for the pyrolysis of spherical material, realizes the recycling of waste gas sensible heat, reduces production cost,
Improve system energy utilization ratio.
Brief description of the drawings
Fig. 1 is the structural representation of the system of the utility model embodiment；
Fig. 2 is the furnace of calcium carbide structure chart of the utility model embodiment；
Fig. 3 is the flow chart of the method for the utility model embodiment.
Embodiment
Below in conjunction with drawings and examples, specific embodiment of the present utility model is described in more details, with
Just the advantages of better understood when scheme and its various aspects of the present utility model.However, specific implementations described below side
Formula and embodiment are for illustrative purposes only, rather than to limitation of the present utility model.
As shown in figure 1, the utility model embodiment provides a kind of system for producing calcium carbide for removing magnesia, including pretreatment
Unit 1, pyrolysis oven 2, furnace of calcium carbide 3, flue 4 and adsorbent equipment 5.The solid material of production calcium carbide is obtained using pyrolysis oven 2, together
When production pyrolysis oil gas.Furnace of calcium carbide 3 discharges the tail gas containing magnesium vapor while producing calcium carbide, and oxygen is obtained after handling tail gas
Change magnesium, remaining High Temperature Gas can provide heat for the pyrolytic reaction of pyrolysis oven.
Pretreatment unit 1 includes drying device 11, calciner 02 and palletizing device 13.Pretreatment unit 1 is pyrolysis oven
Raw material is provided.
Drying device 11 includes raw coal entrance 111 and pelletizing raw coal outlet 112.Drying device 11 is used for former to carbon-based raw material
Coal is dried, and obtains pelletizing raw coal.
Calciner 12 includes calcium based raw material entrance 121 and pelletizing calcium material outlet 122.Calciner 102 can be to calcium base
Material roasting, obtains pelletizing calcium material.
Palletizing device 13 includes pelletizing raw coal entrance 131, pelletizing calcium material entrance 132 and spherical material outlet 133, drying device
Pelletizing raw coal outlet 112 connection palletizing devices pelletizing raw coal entrances 131, calciner pelletizing calcium material outlet 122 connection
The pelletizing calcium material entrance 132 of palletizing device.Pelletizing calcium material caused by pelletizing raw coal caused by drying device 11 and calciner 12,
Palletizing device 13 is sent into, obtains the spherical material needed for pyrolysis oven.
Pyrolysis oven 2 includes spherical material entrance 21, solid matter outlet 22 and pyrolysis oil gas vent 23, the ball of palletizing device 13
The spherical material entrance 21 of shape material outlet connection pyrolysis oven 2.After spherical material enters pyrolysis oven 2, it is heated and pyrolytic reaction occurs, generation is solid
Body material and pyrolysis oil gas.Solid material discharges pyrolysis oven 2 by solid matter outlet 22.Pyrolysis oil gas is gone out by being pyrolyzed oil gas
Mouthfuls 23 are collected, and after handling the pyrolysis oil gas of collection, can obtain the oil gas product of high added value.
As depicted in figs. 1 and 2, furnace of calcium carbide 3 includes body of heater 31, electrode 32, feed pipe 33, blast pipe 34 and calcium carbide outlet
35, the feed pipe 33 of the solid matter outlet connection furnace of calcium carbide 3 of pyrolysis oven 2.Solid material is heated to height in furnace of calcium carbide 3
Temperature, react, generate calcium carbide, by the discharge of calcium carbide outlet 35.
The inside of body of heater 31 is cavity, and when producing calcium carbide, the temperature of the internal cavity of body of heater 31 gradually reduces from bottom to top.Root
According to cavity temperature during production calcium carbide, cavity is from top to bottom divided into bed of material area 311, thermosphere area 312 and reaction zone 313,
The temperature in thermosphere area is 1400~1600 DEG C.In 1400~1600 DEG C of temperature range, it is ensured that the magnesium vapor in tail gas is not
Oxidation reaction occurs with CO.Bed of material area 311 is the preheating zone of material, and material is carried out in the gas that bed of material area 311 and bottom rise
Heat exchange (calcium carbide reaction of formation：3C+CaO=CO+CaC2, the gas is CO).The temperature of reaction zone 313 at 2000 DEG C or so,
Material reacts in this region, generates calcium carbide, while reduction reaction occurs for the magnesia in impurity, generates magnesium vapor.
Electrode 32 is embedded in the top of furnace roof 31, extends in the cavity of body of heater 31, but is not contacted with furnace bottom, is the life of calcium carbide
Production provides energy.
Feed pipe 33 is by being deep into the inner chamber of body of heater 31 at the top of body of heater.Feed pipe 33 is used to material being sent into body of heater.
Feed pipe 33 is arranged in around electrode 32, and the solid material that may be such that into body of heater is distributed in surrounding them, is advantageous to improve
Production efficiency, save the energy.
Blast pipe 34 is located at thermosphere area 312, for extracting the tail gas containing magnesium vapor out.Blast pipe 34 passes through the side wall of body of heater 31
With ft connection.Blast pipe 34 includes baffle plate, on the inclined air inlet tube wall for being fixed on blast pipe 34 of the baffle plate.Baffle plate with
The angle of horizontal plane is 30~60 °, and such design can be easy to tail gas to be pooled to cavity in material bed middle formation cavity area
Region, it is discharged to from blast pipe outside stove.
Flue 4 includes inlet exhaust gas 41 and exhanst gas outlet 42, and the blast pipe 34 of furnace of calcium carbide connects the inlet exhaust gas of flue 4
41.The tail gas containing magnesium vapor that body of heater is discharged by blast pipe 34 enters flue 4, rapid drop in temperature, when containing magnesium vapor
Exhaust temperature when being down to less than 1200 DEG C, react：Mg+CO=MgO+C, generate magnesia.
Adsorbent equipment 5 includes smoke inlet 51, High Temperature Gas outlet 52 and products export 53, the exhanst gas outlet 42 of flue 4 and connected
Connect the smoke inlet 51 of adsorbent equipment 5.Caused magnesia together enters adsorbent equipment 5, absorption dress with other tail gas in flue 4
Putting 5 has adsorption function, adsorbable collection magnesia, discharges remaining gas.The device of the utility model embodiment, not only keeps away
Exempt to aoxidize the influence that magnesium addition produces calcium carbide in carbide raw material, and collected the accessory substance magnesia of high added value, taken
Obtain bigger economic benefit.The magnesia that adsorbent equipment 5 is collected is discharged by products export 53.
High Temperature Gas entrance 24, the high temperature of the connection pyrolysis oven 2 of High Temperature Gas outlet 52 of adsorbent equipment 5 are additionally provided with pyrolysis oven 2
Gas entrance 24.After the absorptive collection magnesia of adsorbent equipment 5, remaining high-temperature tail gas is sent into pyrolysis oven 2, as pyrolytic reaction
Thermal source, realize the recycling of remaining High Temperature Gas, save production cost.
As shown in figure 3, on the other hand, the utility model embodiment provides a kind of side that calcium carbide is produced using said system
Method, comprise the following steps：
1st, low order raw coal in powdery is dried, after powdered calcium based raw material is calcined, be well mixed, pelletizing raw coal and
The mass ratio of pelletizing calcium material is 0.6~1.4:1, preferably 0.8~1:1；Mixture carries out pelletizing, obtains spherical material.
2nd, spherical material is sent into pyrolysis oven, 500~900 DEG C of generation pyrolytic reactions, obtains solid material and pyrolysis oil gas.
3rd, solid material is sent into furnace of calcium carbide, is heated to 2100~2300 DEG C, generate calcium carbide and the tail gas containing magnesium vapor；Will
Calcium carbide stove exhaust outlet is arranged on lower section in the bed of material so that 1400 DEG C of calcium carbide stove exhaust temperature ＞.
4th, the tail gas containing magnesium vapor is discharged into the furnace of calcium carbide by blast pipe, then cooled down by flue, at 1200 DEG C
Oxidation reaction is occurred below, generates the flue gas containing magnesia.
5th, flue gas is sent into adsorbent equipment, absorptive collection magnesia, discharges remaining High Temperature Gas.
6th, remaining about 1000~1200 DEG C of high temperature calcium carbide stove exhaust is sent into pyrolysis unit by pipeline, as pyrolysis-type
Ball thermal source.
Specifically, in the utility model embodiment, the calcium based raw material includes lime, lime stone, white lime and carbide slag
In one or more.
The pyrolysis oil gas obtained in above-mentioned steps 2, can further be finished, obtain the oil gas of high added value into
Product.
Embodiment 1
Middle low order fine coal, using somewhere jet coal, composition such as table 1, in table 1, As-received refers to the state for receiving coal, one
As coal exploit and transportation in can spray a large amount of water, so, the measure of full water is the coal of As-received；Butt refer to by
The coal benchmark that coal obtains after fully drying, does not now have moisture substantially in coal.
The jet coal composition of table 1
| Project | Unit | Numerical value | Remarks |
| Quan Shui | Wt% | 5.33 | As-received |
| Fixed carbon | Wt% | 55.7 | Butt |
| Volatile matter | Wt% | 37.2 | Butt |
| Ash content | Wt% | 7.1 | Butt |
Lime stone is calcined, obtains lime, stone ash composition such as table 2：
The lime composition of table 2
| TFe/% | CaO/% | MgO/% | SiO2/ % | Al2O3/ % | MnO2/ % | SO3/ % | P2O5/ % | Other/% |
| 0.32 | 91.7 | 2.41 | 1.62 | 0.55 | 0.11 | 0.02 | 0.03 | 3.24 |
1st, after jet coal is dried, it is well mixed with lime, the mass ratio of jet coal and lime is 0.93：1, mixed
Material, pelletizing processing is carried out to mixed material, obtains spherical material.
2nd, spherical material is delivered into pyrolysis oven, using the High Temperature Gas of adsorbent equipment discharge as pyrolysis thermal source, spherical material be heated to
700 DEG C or so, the pyrolysis gas and pyrolysis oil of pyrolytic reaction, output solid material and high added value occurs.
3rd, high-temp solid material is delivered in closed calcium carbide furnace, material is heated to 2200 DEG C by the heat release of electrode open arc
Left and right, produce calcium carbide, while the tail gas containing magnesium vapor of the high temperature of output；Tail gas is by being arranged at furnace of calcium carbide side middle and lower part
Blast pipe discharge furnace of calcium carbide outside, blast pipe top sets horizontal downward baffle plate, and baffle plate is 45 ° with horizontal line angle, calcium carbide
The tail gas tapping temperature containing magnesium vapor is 1500 DEG C or so in stove.
4th, after the tail gas containing magnesium vapor is by flue, temperature is down to 1200 DEG C or so, and oxidation reaction, generation oxidation occur for magnesium
Magnesium.
5th, the flue gas containing magnesia enters adsorbent equipment, obtains the high added value magnesium oxide product of by-product content about 60%.
Contain calcium carbide 81.26%, gas forming amount 302L/kg in product calcium carbide.
It should be noted that each embodiment above by reference to described by accompanying drawing is only illustrating the utility model rather than limit
The scope of the utility model processed, it will be understood by those within the art that, do not departing from spirit of the present utility model and model
The modification carried out on the premise of enclosing to the utility model or equivalent substitution, all should cover within the scope of the utility model.
In addition, signified outer unless the context, the word occurred in the singular includes plural form, and vice versa.In addition, except non-specifically
Explanation, then all or part of of any embodiment can combine all or part of of any other embodiment and use.
Claims (5)
1. a kind of system for producing calcium carbide for removing magnesia, it is characterised in that including pyrolysis oven, furnace of calcium carbide, flue and absorption dress
Put；
The pyrolysis oven includes spherical material entrance and solid matter outlet；
The furnace of calcium carbide includes body of heater, feed pipe and blast pipe；The inner chamber of the body of heater includes thermosphere area；The feed pipe is by institute
State the inner chamber that the body of heater is deep at the top of body of heater；The blast pipe is located at the thermosphere area, and the blast pipe is described in
The side wall and ft connection of body of heater；The blast pipe includes baffle plate, the inclined air inlet for being fixed on the blast pipe of the baffle plate
Mouthful；
The flue includes inlet exhaust gas and exhanst gas outlet；
The adsorbent equipment includes smoke inlet；
The solid matter outlet of the pyrolysis oven connects the feed pipe of the furnace of calcium carbide, the gas outlet of the blast pipe of the furnace of calcium carbide
Connect the inlet exhaust gas of the flue, the smoke inlet of the exhanst gas outlet connection adsorbent equipment of the flue.
2. system according to claim 1, it is characterised in that further comprise pretreatment unit, the pretreatment unit
Including drying device, calciner and palletizing device；
The drying device includes raw coal entrance and pelletizing raw coal exports；
The calciner includes calcium based raw material entrance and pelletizing calcium material exports；
The palletizing device includes pelletizing raw coal entrance, pelletizing calcium material entrance and the outlet of spherical material；
The pelletizing raw coal outlet of the drying device connects the pelletizing raw coal entrance of the palletizing device, and the calciner is made
The outlet of ball calcium material connects the pelletizing calcium material entrance of the palletizing device, and the spherical material outlet of the palletizing device connects the pyrolysis
The spherical material entrance of stove.
3. system according to claim 1, it is characterised in that the adsorbent equipment also includes High Temperature Gas and exported, the heat
Solution stove includes High Temperature Gas entrance, and the High Temperature Gas outlet of the adsorbent equipment connects the High Temperature Gas entrance of the pyrolysis oven.
4. system according to claim 1, it is characterised in that the baffle plate of the blast pipe and the angle of horizontal direction are 30
~60 °.
5. system according to claim 1, it is characterised in that the pyrolysis oven also includes at the top of the pyrolysis oven
It is pyrolyzed oil gas vent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720620468.XU CN206886689U (en) | 2017-05-31 | 2017-05-31 | A kind of system for producing calcium carbide for removing magnesia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720620468.XU CN206886689U (en) | 2017-05-31 | 2017-05-31 | A kind of system for producing calcium carbide for removing magnesia |
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| Publication Number | Publication Date |
|---|---|
| CN206886689U true CN206886689U (en) | 2018-01-16 |
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ID=61320902
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720620468.XU Expired - Fee Related CN206886689U (en) | 2017-05-31 | 2017-05-31 | A kind of system for producing calcium carbide for removing magnesia |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107055539A (en) * | 2017-05-31 | 2017-08-18 | 神雾环保技术股份有限公司 | A kind of system for producing calcium carbide and method for removing magnesia |
-
2017
- 2017-05-31 CN CN201720620468.XU patent/CN206886689U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107055539A (en) * | 2017-05-31 | 2017-08-18 | 神雾环保技术股份有限公司 | A kind of system for producing calcium carbide and method for removing magnesia |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180116 Termination date: 20190531 |
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| CF01 | Termination of patent right due to non-payment of annual fee |