CN105948049B - A kind of system and method for production of calcium carbide from its residue - Google Patents
A kind of system and method for production of calcium carbide from its residue Download PDFInfo
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Abstract
The present invention relates to a kind of system and method for production of calcium carbide from its residue.The system includes clean unit, dry supply unit, centrifugal unit, calcining unit and the calcium carbide unit sequentially set, wherein, clean unit includes carbonation unit and press filtration unit, the carbonized solid slurry entrance of press filtration unit is connected with the carbonized solid slurry outlet of carbonation unit, and the carbonized solid outlet of press filtration unit is connected with drying the entrance of supply unit；Outlet of the centrifugation carbonized solid entrance of centrifugal unit with drying supply unit is connected；The calcining carbonized solid entrance for calcining unit is connected with the outlet of centrifugation carbonized solid；Calcium oxide powder outlet of the calcium oxide powder entrance of calcium carbide unit with calcining unit is connected.The method that the present invention produces calcium carbide using said system, by being passed through into carbide slag slurries containing CO2Gas, carbide slag slurries are purified.The present invention can solve the problems, such as that the processing of carbide slag is more difficult, and fundamentally realize the low cost of calcium carbide, the production ways of low stain.
Description
Technical field
The invention mainly relates to a kind of system and method for producing calcium carbide, more particularly to a kind of production of calcium carbide from its residue is
System and method.
Background technology
Carbide slag is residue caused by calcium carbide hydrolysis production acetylene, moisture therein in 60-80%, effectively into
Divide mainly calcium hydroxide, also a small amount of second containing the solid impurities such as magnesia, aluminum oxide, ferrosilicon and dissolving in aqueous
The gases such as alkynes, hydrogen sulfide and hydrogen phosphide.According to statistics, produce in year 200000 tons of PVC factory discharge carbide slag slurries up to 3,600,000 tons/
Year, enormous amount, and waste residue slurry distributes foul odour, and ill effect is generated to surrounding environment.At present, the application of carbide slag
It is concentrated mainly in manufacture of cement, desulfurization technology, the industry such as production of construction material.But because exist in carbide slag more miscellaneous
Matter, and water content is high, therefore the utilization rate of carbide slag is relatively low, the 50% of insufficient carbide slag total amount, thus still have substantial amounts of calcium carbide
Slag exists as discarded object.
At the same time, calcium carbide production process needs substantial amounts of quality block lime stone, need to exploit billions of tons of lime every year
Stone, a certain degree of destruction is caused to ecological environment.Meanwhile calcium carbide production needed for carbon source still based on high-quality bulk coke,
Its is expensive, and the industries such as the steel of same demand coke carbon source, thermoelectricity be present, so that coke carbon source cost is higher.
Therefore, if carbide slag can be reclaimed, by certain technical finesse, it is allowed to meet calcium carbide production technology to raw material
It is required that and mix next life electricity production stone using it with as the coke powder of carbon source, then calcium carbide-carbide slag-calcium carbide can be achieved and recycle,
Demand of the calcium carbide industry to lime stone is not only reduced, also solves the problems, such as that the processing of carbide slag is more difficult, and coke powder compares Jiao
Charcoal is more cheap and easy to get, thus can realize calcium carbide industry low cost, the production ways of low stain.
At some in the prior art, problems with is still suffered from：
The modifying agent of calcium carbide ground-slag uses strong acid and acid salt, and such modifying agent mixes new impurity in carbide slag, made
The mixing for obtaining carbide slag and acid and acid salt is relatively difficult；
The addition of organic binder bond is larger, and cost is higher, relatively difficult with the mixing of material, and practical operation difficulty is very
Greatly, it is virtually impossible to realize industrialization；
Calcination stage is using inert gas as carrier, and tar and pyrolysis gas mix with inert gas caused by pyrolysis, quality compared with
Serious problem of environmental pollution be present in difference, directly discharge.
In the prior art, also have some other carbide slags recovery method, the raw material that carbide slag is produced as calcium carbide,
But simple drying calcining is simply carried out to carbide slag, the impurity in carbide slag is not handled, therefore obtained calcium carbide
Inferior quality.
Therefore, in view of the above-mentioned problems, being necessary to provide a kind of technology using production of calcium carbide from its residue, calcium carbide can be purified
Slag so that the composition of carbide slag fully meets the requirement of calcium carbide production, and and can directly effectively utilizes coke powder, shortens technological process,
Process costs are reduced, reduce calcium carbide energy consumption.
The content of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of system and method for production of calcium carbide from its residue, the system and side
The purpose of method is that solve the problems, such as that carbide slag is more as impurity present in production carbide raw material, while causes technological process contracting
Short, process costs reduce, and calcium carbide energy consumption reduces.
The system of production of calcium carbide from its residue provided by the invention includes：The clean unit that sequentially sets, dry supply unit,
Centrifugal unit, calcining unit and calcium carbide unit, wherein, the clean unit includes carbonation unit and press filtration unit, the carbonization
Unit includes carbide slag entrance, circulation water inlet, CO2Entrance and the outlet of carbonized solid slurry；The press filtration unit includes carbonization
Solid slurry inlet and carbonized solid outlet, the carbonized solid of the carbonized solid slurry entrance and the carbonation unit of the press filtration unit
Slurry outlet is connected, and the carbonized solid outlet of the press filtration unit is connected with the entrance of the dry supply unit；The centrifugation is single
Member includes centrifugation carbonized solid entrance and the outlet of centrifugation carbonized solid, and the centrifugation carbonized solid entrance and the dry conveying are single
The outlet of member is connected；The calcining unit includes calcining carbonized solid entrance and calcium oxide powder outlet, the calcining carbonized solid
Entrance is connected with the centrifugation carbonized solid outlet；The calcium carbide unit includes calcium oxide powder entrance, coke powder entrance, oxygen-containing gas
Entrance, calcium carbide furnace gas outlet and calcium carbide outlet；The calcium oxide powder of the calcium oxide powder entrance and the calcining unit exports phase
Even.
Further, the system may also include pretreatment unit, and the pretreatment unit includes the calcium carbide being sequentially connected
Warehouse and carbide slag helix transporting device among slag crushing device, carbide slag；The outlet of the carbide slag helix transporting device with
The carbide slag entrance of the carbonation unit is connected.
Further, the system may also include acetylene unit, and the acetylene unit includes calcium carbide entrance, water inlet, second
Alkynes exports and carbide slag outlet, and the calcium carbide entrance is connected with the calcium carbide outlet of the calcium carbide unit；The carbide slag outlet
It is connected with the carbide slag entrance of the carbonation unit.
Further, the system may also include calcium carbide slag bath, the entrance of the calcium carbide slag bath and the acetylene unit
Carbide slag outlet is connected, and the outlet of the calcium carbide slag bath is connected with the calcium carbide slag crushing device of the pretreatment unit.
Further, in said system, the calcining unit also includes off-gas recovery mouth, the off-gas recovery mouth with it is described
The dried medium entrance for drying supply unit is connected.
The present invention also provides a kind of method that calcium carbide is produced using said system, comprises the following steps：
Will<1mm carbide slag is placed in the carbonation unit plus water stirring, forms carbide slag slurries；
It is passed through in the carbide slag slurries into described carbonation unit containing CO2Gas, to reduce the carbide slag slurries
In S, P content and separation magnesia, obtain carbonized solid slurry；
The carbonized solid slurry that purification is obtained is delivered in the press filtration unit, is extruded tentatively to remove water, is obtained carbon
Change solid；
The carbonized solid is transported to by the centrifugal unit by the dry supply unit；To described while conveying
Carbonized solid is dried, and obtains drying carbonized solid；
The dry carbonized solid is removed into iron oxides impurities by centrifuging in the centrifugal unit, obtains centrifuging carbon
Change solid；
The centrifugation carbonized solid being centrifugally separating to obtain is sent into the calcining unit and calcined, obtains quick lime
Powder；
The calcium lime powder for calcining gained is put into the calcium carbide unit, coke powder is added in the calcium carbide unit, and
The calcium lime powder is mixed with coke powder, calcium carbide is generated by the hot method of oxygen.
Further, methods described may also include step：
Block carbide slag is crushed to by the calcium carbide slag crushing device<1mm, and broken carbide slag is placed in described
Warehouse among carbide slag, the clean unit is transported to by the carbide slag helix transporting device by the broken carbide slag.
In the above method, the solid content of the carbide slag slurries is 8.0-25wt%.
In the above method, it is passed through in the carbide slag slurries and described contains CO2After gas, the pH of the carbide slag slurries is adjusted to
8-11；It is described to contain CO2CO in gas2Volumetric concentration be 15-27%.
Further, methods described may also include step：
By the calcium carbide of the generation using dry method carbide acetylene production method generation acetylene and carbide slag, and by the calcium carbide
Slag is transported to the carbonation unit or the calcium carbide slag bath.
According to the above-mentioned technical proposal of the present invention, carbide slag has both been purified so that the composition of carbide slag fully meets calcium carbide
The requirement of production, and coke powder is directly efficiently utilized, technological process is shortened, reduces process costs, while reduce electricity
Stone energy consumption.
Brief description of the drawings
Fig. 1 is the structure diagram and process chart of production of calcium carbide from its residue of the present invention；
Fig. 2 is the schematic diagram of the embodiment of system one of production of calcium carbide from its residue of the present invention；And
Fig. 3 is the schematic diagram of another embodiment of system of production of calcium carbide from its residue of the present invention.
Embodiment
Below in conjunction with drawings and examples, the embodiment of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and various aspects.However, specific embodiments described below and implementation
Example is for illustrative purposes only, rather than limitation of the present invention.
It is as shown in Figure 1 the structure diagram and process chart of production of calcium carbide from its residue of the invention, technology of the invention
Scheme is：By carbide slag by (pretreatment is depending on the property of carbide slag, it is not necessary to sets) after pretreatment, one is made
Determine the carbide slag slurries of concentration, be then bubbled into CO from carbide slag slurries bottom2, make calcium phosphide, the calcium sulfide decile in carbide slag
Solve and escaped for gases such as hydrogen phosphide, hydrogen sulfide from carbide slag, so as to reduce the S in carbide slag, P content；Meanwhile in carbide slag
Magnesia can react to produce in the presence of carbonic acid and be dissolved in the sodium acid carbonate of water, into the aqueous solution, and the less carbon of solubility
Sour calcium still exists in solid form, so as to reach the effect of separation magnesia, to the decontamination procedure of this completion carbide slag；After purification
Carbide slag through dry remove portion of water after, be centrifuged, utilize the difference of each oxide density, further remove
Aluminum oxide and iron oxide in carbide slag, obtain active ingredient calcium carbonate；The calcium carbonate for being centrifuged obtaining is in limekiln
Calcining, produce calcium oxide powder；Calcium oxide powder is mixed with coke powder in calcium carbide processing unit, and calcium carbide is prepared by the hot method of oxygen；Calcium carbide energy
Acetylene and carbide slag are further obtained, and carbide slag is recyclable for producing calcium carbide, whole process forms closed cycle, can pole
The earth improves the utilization rate of raw material, reduces solid waste discharge, production cost can be reduced while environmental protection.
Wherein, the hot method of oxygen of the present invention, refer to utilize oxygen-enriched or pure oxygen and part pulverized coal friring liberated heat, make
Remaining fine coal and powdery calcium oxide, which reacts, generates calcium carbide.
Specifically, as shown in Fig. 2 the embodiment of the system of production of calcium carbide from its residue of the present invention is disclosed, in the present embodiment
In, the system of production of calcium carbide from its residue includes pretreatment unit 1, carbonation unit 2, press filtration unit 3, dry supply unit 4, centrifugation
Unit 5, calcining unit 6, calcium carbide unit 7, acetylene unit 8 form, wherein the not necessarily device of pretreatment unit 1, carbonation unit 2
Can generally be under the jurisdiction of clean unit with press filtration unit 3, acetylene unit 8 nor necessary device, visual field requirement and determine
Whether increase in systems.
The pretreatment unit 1 of production of calcium carbide from its residue includes calcium carbide slag crushing device 11, carbide slag centre warehouse 12, calcium carbide
Slag helix transporting device 13；Warehouse 12 and carbide slag helix transporting device 13 among the calcium carbide slag crushing device 11, carbide slag
It is sequentially connected.When carbide slag is larger block, the pretreatment unit 1 can be used.Calcium carbide slag crushing device 11 is used for broken electricity
Rock ballast, carbide slag centre warehouse 12 are used to store the carbide slag after crushing, and carbide slag helix transporting device 13 is used for broken
Carbide slag transports carbonation unit 2 to.
With reference to Fig. 1, carbonation unit 2 is generally tower reactor, including set carbide slag entrance 21 on the reaction vessel,
Circulate water inlet 22, CO2Entrance 23, CO2Outlet 24, overflow box outlet 25 and carbonized solid slurry outlet 26.Here in container
The main component of carbonized solid slurry be calcium carbonate, and mix water miscible magnesium bicarbonate and the oxide of other impurities；
The carbide slag entrance 21 is connected with carbide slag helix transporting device 13.In the unit, certain density carbide slag is first made
Slurry, is then bubbled into CO from carbide slag slurries bottom2, carbide slag is purified.
Press filtration unit 3 is generally leaf filter, including carbonized solid slurry entrance 31, the filtrate (liquid 32 being disposed thereon
And carbonized solid outlet 33；The carbonized solid slurry entrance 31 is connected with carbonized solid slurry outlet 26；The carbonized solid goes out
Mouth 33 is connected with drying the entrance of supply unit 4.The portion of water in carbide slag slurries is tentatively removed in this element.
It is conveyer belt to dry supply unit 4, and the effect for drying supply unit 4 is by the carbonized solid of the gained of press filtration unit 3
Centrifugal unit 5 is transported to, and carbonized solid is dried in course of conveying, dried medium used comes from calcining unit 6
Caused flue gas, and it is opposite with the transmission direction of conveyer belt.I.e. carbonized solid transmits on a moving belt, defeated from calcining unit 6
The flue gas ejiction opening come faces the carbonized solid in transmission belt, and gas flows from top to bottom, and carbonized solid is transported from lower toward tiltedly upper
It is dynamic so that carbonized solid is dried in transmission.
Centrifugal unit 5 is after carbonized solid entrance 51 and centrifugation are centrifuged after centrifuge, including the drying being arranged on device
Centrifugation carbonized solid outlet 52 and impurities outlet 53；The centrifugation carbonized solid entrance 51 is with drying going out for supply unit 4
Mouth is connected.The aluminum oxide and iron oxide in carbide slag are further removed in the unit, obtains active ingredient calcium carbonate.
Calcining unit 6 is limekiln, including calcining carbonized solid entrance 61, the heating medium inlet being arranged on device
62nd, off-gas recovery mouth 63 and calcining rear oxidation calcium powder outlet 64；The calcining carbonized solid entrance 61 and centrifugation carbonized solid
Outlet 52 is connected.The calcium carbonate for being centrifuged obtaining in this element is calcined in limekiln, produces calcium oxide powder.
Calcium carbide unit 7 is closed type calcium carbide furnace, including calcining rear oxidation calcium powder entrance 71, coke powder entrance 72, oxygen-containing gas
Entrance 73, calcium carbide furnace gas outlet 74 and calcium carbide outlet 75；The calcium oxide powder entrance 71 exports with calcining unit calcium oxide powder
64 are connected；Calcium carbide furnace gas outlet 74 is connected with calcining unit heating medium inlet 62.Electricity is prepared by the hot method of oxygen in the unit
Stone.
As shown in Fig. 2 said system may also include calcium carbide slag bath 9.Acetylene unit 8 is acetylene generator, including calcium carbide
Entrance 81, water inlet 82, acetylene outlet 83, overfall 84 and carbide slag outlet 85；The calcium carbide entrance 81 and calcium carbide unit
Calcium carbide outlet 75 be connected；When carbide slag is deposited too long in the calcium carbide slag bath 9, carbide slag can form bulk, need to be through pre- place
Reason unit 1 carries out break process to it, thus carbide slag outlet 85 can successively with calcium carbide slag bath 9 and pretreatment unit 1
Calcium carbide slag crushing device 11 is connected, or, the carbide slag come out through acetylene unit 8 is routed directly to carbonation unit 2 and carried out at purification
Reason, as shown in figure 3, now carbide slag outlet 85 is connected with the carbide slag entrance 21 of carbonation unit 2.
The method of the production of calcium carbide from its residue of the present invention comprises the following steps：
The first step：Carbide slag pre-processes, and the property of step carbide slag used in determines：When the carbide slag resting period compared with
It is long, in caking shape, then it must first pass through calcium carbide slag crushing device 11 and be crushed to<1mm, it is placed in warehouse 12 among carbide slag
It is interior, and carbonation unit 2 is transported to by helix transporting device, add water to stir；When carbide slag is the larger carbide slag slurries of water content,
It is then directly added to water stirring in carbonation unit 2, forms the carbide slag slurries of certain solid content；The obtained carbide slag slurries
Solid content is 8.0-25wt%；
Second step：Purification, is passed through containing CO in carbonation unit 2 into the carbide slag slurries described in step 12Gas, regulation are molten
The pH of liquid is 8-11；It is described to contain CO2Gas is boiler exhaust gas or other flue gases, CO2Volumetric concentration be 15-27%；
3rd step：To dry, the carbide slag slurries that purification is obtained first tentatively are removed water in press filtration unit 3 by extruding,
Water content after extruding in carbide slag is 40-60%；Afterwards, the flue gas pair discharged in dry supply unit 4 using limekiln
Carbide slag is dried, and drying temperature is 150-200 DEG C；
4th step：Centrifuge, according to calcium carbonate and the difference of other impurities density, dried carbide slag is being centrifuged
Unit 5 is separated by centrifugal separating device, further removes the impurity such as iron oxide therein；
5th step：Calcining：The calcium carbonate finally given is calcined to obtain calcium lime powder in calcining unit 6, calcines temperature
Spend for 850-1000 DEG C；Heating medium is calcium carbide furnace gas caused by calcium carbide unit 7 needed for calcining；
6th step：Calcium carbide is generated, the calcium lime powder of gained will be calcined by being heat-fed the calcium carbide of Technical investment calcium carbide unit 7
Stove, and the coke powder with being sent into simultaneously mixes, the hot method generation calcium carbide of oxygen；Furnace of calcium carbide used is air flow bed；Oxygen-containing atmosphere used is sky
Gas, high pure oxygen；Calcium carbide generation temperature is 1750-2000 DEG C；
7th step：Acetylene and carbide slag are generated, in acetylene unit 8 using dry method carbide acetylene technology more ripe at present
Generate acetylene and carbide slag, the carbide slag of generation are whole again as calcium carbide raw materials for production after foregoing purification separation
Individual production circuit forms the mode of production of circulation.This certain step is nor the steps necessary of technical solution of the present invention, this hair
Carbide slag in bright technical scheme can directly be transported by elsewhere.
It should be noted that " wt% " refers both to percentage by weight herein.
From such scheme, method that carbide slag and coke powder provided by the invention prepare calcium carbide by oxidizing process is used
Raw material is carbide slag and coke powder, is industrial residue, cost of material is low；Technical scheme had both solved carbide slag profit
With rate is low, environmental problem caused by random stacking, suitable purification method is utilized again, is greatly reduced present in carbide slag
The impurity such as magnesia, iron oxide, aluminum oxide and calcium sulfide, calcium phosphide so that the composition of carbide slag meets wanting for calcium carbide production
Ask, and the high temperature coke powder that the obtained calcium lime powder of carbide slag purified treatment directly obtains with fast pyrogenation mixes, and passes through oxygen heat
Method prepares calcium carbide, not only eliminates ball making process, shortens technological process, reduces process costs, and can directly utilize high temperature
Heat entrained by coke powder, improves heat utilization efficiency, reduces calcium carbide energy consumption.
Illustrate technical scheme with reference to specific embodiment.
Institute's taking technique condition value is exemplary in following embodiments, and its desirable number range is as indicated above in book
It is shown.
Embodiment 1
The calcium carbide clinker to have lumpd is crushed to by calcium carbide slag crushing device 11<1mm is stored in warehouse 12 among carbide slag,
And be transported to by carbide slag helix transporting device 13 in carbonation unit 2, add water to stir, form solid content about 20wt%'s
Carbide slag slurries；CO is passed through into carbide slag slurries2Volumetric concentration is 25% boiler exhaust gas, and the pH for adjusting carbide slag slurries is 8-11,
It is calcium carbonate by the main component calcium hydroxide carbonization in carbide slag, and oxidation of impurities reactive magnesium turns into water miscible bicarbonate
Magnesium, solid is sent into press filtration unit 3 after preliminary sedimentation after carbonization, its water content is down to less than 40%, is then conveyed through drying
Solid Conveying and Melting is dried to centrifugal unit 5, and in course of conveying using flue gas caused by limekiln after unit 4 will be carbonized,
About 150 DEG C of drying temperature；Dried calcium carbonate mixtures of impurities separates in centrifugal separator, according to calcium carbonate and oxidation
Difference between aluminium, iron oxide, magnesia etc. can remove the oxide impurity in calcium carbonate, calcium carbonate solid after must purifying, and
Enter to calcine the limekiln calcining of unit 6, calcining heat is 950 DEG C, obtains calcium carbide raw materials for production calcium lime powder；It is sent into calcium carbide unit
The calcium lime powder of 7 air flow bed is reacted with the coke powder and oxygen-containing gas added simultaneously, and calcium carbide is produced at 1850 DEG C；The electricity of generation
Stone reacts in the acetylene generator of acetylene unit 8 with water, obtains acetylene and carbide slag, the carbide slag of generation is through foregoing
After purification separation, again as calcium carbide raw materials for production, closed cycle is formed.
Embodiment 2
Caused carbide slag is directly transported in carbonation unit 2 in acetylene unit 8, adds water to stir, and forms solid content about
15wt% carbide slag slurries；CO is passed through into carbide slag slurries2Volumetric concentration is 20% boiler exhaust gas, adjusts carbide slag slurries
PH be 8-11, be calcium carbonate by the main component calcium hydroxide carbonization in carbide slag, and oxidation of impurities reactive magnesium is as water-soluble
The magnesium bicarbonate of property, solid is sent into press filtration unit 3 after preliminary sedimentation after carbonization, its water content is down to 60% or so, then
Solid Conveying and Melting is to centrifugal unit 5 after drying supply unit 4 and will be carbonized, and flue gas caused by limekiln is used in course of conveying
It is dried, about 200 DEG C of drying temperature；Dried calcium carbonate mixtures of impurities separates in centrifugal separator, according to carbonic acid
Difference between calcium and aluminum oxide, iron oxide, magnesia etc. can remove the oxide impurity in calcium carbonate, the carbon after being purified
Sour calcium solid, the limekiln calcining of calcining unit 6 is incorporated to, calcining heat is 850 DEG C, obtains calcium carbide raw materials for production calcium lime powder；
The calcium lime powder for being sent into the air flow bed of calcium carbide unit 7 reacts with the coke powder and oxygen-containing gas added simultaneously, is produced at 2000 DEG C
Calcium carbide；The calcium carbide of generation reacts in acetylene unit 8 with water, obtains acetylene and carbide slag, the carbide slag of generation is through noted earlier
Purification separation after, again as calcium carbide raw materials for production, form closed cycle.
As seen from the above-described embodiment, technical scheme has both purified carbide slag so that the composition of carbide slag is abundant
Meet the requirement of calcium carbide production, and directly efficiently utilize coke powder, shorten technological process, reduce process costs, simultaneously
Reduce calcium carbide energy consumption.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
Among the obvious changes or variations that Shen goes out is still in protection scope of the present invention.
Claims (10)
1. a kind of system of production of calcium carbide from its residue, clean unit that the system includes sequentially setting, dry supply unit, from
Heart unit, calcining unit and calcium carbide unit, wherein,
The clean unit includes carbonation unit and press filtration unit, the carbonation unit include carbide slag entrance, circulation water inlet,
CO2Entrance and the outlet of carbonized solid slurry；The press filtration unit includes carbonized solid slurry entrance and carbonized solid outlet, the pressure
The carbonized solid slurry entrance of filter unit is connected with the carbonized solid slurry outlet of the carbonation unit, and the carbonization of the press filtration unit is consolidated
Body outlet is connected with the entrance of the dry supply unit；
The centrifugal unit include centrifugation carbonized solid entrance and centrifugation carbonized solid outlet, it is described centrifugation carbonized solid entrance with
The outlet of the dry supply unit is connected；
It is described calcining unit include calcining carbonized solid entrance and calcium oxide powder outlet, it is described calcining carbonized solid entrance with it is described
Carbonized solid outlet is centrifuged to be connected；
The calcium carbide unit includes calcium oxide powder entrance, coke powder entrance, oxygen-containing gas entrance, calcium carbide furnace gas outlet and calcium carbide and gone out
Mouthful；The calcium oxide powder entrance is connected with the calcium oxide powder outlet of the calcining unit.
2. system according to claim 1, it is characterised in that the system also includes pretreatment unit, the pretreatment
Unit includes the calcium carbide slag crushing device, carbide slag centre warehouse and carbide slag helix transporting device being sequentially connected；The calcium carbide
The outlet of slag helix transporting device is connected with the carbide slag entrance of the carbonation unit.
3. system according to claim 1, it is characterised in that the system also includes acetylene unit, the acetylene unit
Go out including calcium carbide entrance, water inlet, acetylene outlet and carbide slag outlet, the calcium carbide of the calcium carbide entrance and the calcium carbide unit
Mouth is connected；The carbide slag outlet is connected with the carbide slag entrance of the carbonation unit.
4. system according to claim 2, it is characterised in that the system also includes calcium carbide slag bath and acetylene unit, institute
Stating acetylene unit includes calcium carbide entrance, water inlet, acetylene outlet and carbide slag outlet, the calcium carbide entrance and the calcium carbide list
The calcium carbide outlet of member is connected；The entrance of the calcium carbide slag bath is connected with the carbide slag outlet of the acetylene unit, the carbide slag
The outlet in pond is connected with the calcium carbide slag crushing device of the pretreatment unit.
5. system according to claim 1, it is characterised in that the calcining unit also includes off-gas recovery mouth, the cigarette
Gas recovery port is connected with the dried medium entrance of the dry supply unit.
6. a kind of method using any one of claim 1 to the 5 system production calcium carbide, comprise the following steps：
Will<1mm carbide slag is placed in the carbonation unit plus water stirring, forms carbide slag slurries；
It is passed through in the carbide slag slurries into described carbonation unit containing CO2Gas, so as to reduce the S in the carbide slag slurries,
P content and separation magnesia, obtain carbonized solid slurry；
The carbonized solid slurry that purification is obtained is delivered in the press filtration unit, extrudes tentatively to remove water, it is solid to obtain carbonization
Body；
The carbonized solid is transported to by the centrifugal unit by the dry supply unit；To the carbonization while conveying
Solid is dried, and obtains drying carbonized solid；
The dry carbonized solid is removed into iron oxides impurities by centrifuging in the centrifugal unit, it is solid to obtain centrifugation carbonization
Body；
The centrifugation carbonized solid being centrifugally separating to obtain is sent into the calcining unit and calcined, obtains calcium lime powder；
The calcium lime powder for calcining gained is put into the calcium carbide unit, adds coke powder in the calcium carbide unit, and make institute
State calcium lime powder to mix with coke powder, calcium carbide is generated by the hot method of oxygen.
7. according to the method for claim 6, it is characterised in that methods described also includes step：
Block carbide slag is crushed to by the calcium carbide slag crushing device<1mm, and broken carbide slag is placed in the calcium carbide
Warehouse among slag, the clean unit is transported to by the carbide slag helix transporting device by the broken carbide slag.
8. according to the method for claim 6, it is characterised in that the solid content of the carbide slag slurries is 8.0-25wt%.
9. according to the method for claim 6, it is characterised in that contain CO described in being passed through in the carbide slag slurries2After gas, institute
The pH for stating carbide slag slurries is adjusted to 8-11；It is described to contain CO2CO in gas2Volumetric concentration be 15-27%.
10. according to the method for claim 6, it is characterised in that methods described also includes step：
The calcium carbide of the generation is generated into acetylene and carbide slag using dry method carbide acetylene production method, and the carbide slag is defeated
It is sent to the carbonation unit or the calcium carbide slag bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610282477.2A CN105948049B (en) | 2016-04-29 | 2016-04-29 | A kind of system and method for production of calcium carbide from its residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610282477.2A CN105948049B (en) | 2016-04-29 | 2016-04-29 | A kind of system and method for production of calcium carbide from its residue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105948049A CN105948049A (en) | 2016-09-21 |
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| CN106517203B (en) * | 2016-11-09 | 2018-05-25 | 重庆鸿庆达产业有限公司 | A kind of system for producing calcium carbide |
| CN106542532A (en) * | 2016-11-22 | 2017-03-29 | 北京神雾环境能源科技集团股份有限公司 | The system and method for preparing carbide |
| CN107312559A (en) * | 2017-07-17 | 2017-11-03 | 神雾环保技术股份有限公司 | The system and method that a kind of high temperature pyrolysis gas is recycled |
| CN107720797A (en) * | 2017-11-01 | 2018-02-23 | 神雾环保技术股份有限公司 | The system and method for handling carbide slag |
| CN107935010A (en) * | 2017-12-29 | 2018-04-20 | 神雾环保技术股份有限公司 | The system and method for handling carbide slag |
| CN108083279A (en) * | 2017-12-29 | 2018-05-29 | 神雾环保技术股份有限公司 | The system and method for handling carbide slag |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101830492A (en) * | 2009-06-08 | 2010-09-15 | 王嘉兴 | Material recycling method in calcium carbide industry |
| CN105129800A (en) * | 2015-07-21 | 2015-12-09 | 北京神雾环境能源科技集团股份有限公司 | Process and system of preparing calcium carbide and ethylene through oxygen/coal injection |
| CN204981160U (en) * | 2015-07-21 | 2016-01-20 | 北京神雾环境能源科技集团股份有限公司 | System for oxygen / coal jetting preparation carbide and ethylene |
| CN205740374U (en) * | 2016-04-29 | 2016-11-30 | 神雾环保技术股份有限公司 | A kind of system of production of calcium carbide from its residue |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830492A (en) * | 2009-06-08 | 2010-09-15 | 王嘉兴 | Material recycling method in calcium carbide industry |
| CN105129800A (en) * | 2015-07-21 | 2015-12-09 | 北京神雾环境能源科技集团股份有限公司 | Process and system of preparing calcium carbide and ethylene through oxygen/coal injection |
| CN204981160U (en) * | 2015-07-21 | 2016-01-20 | 北京神雾环境能源科技集团股份有限公司 | System for oxygen / coal jetting preparation carbide and ethylene |
| CN205740374U (en) * | 2016-04-29 | 2016-11-30 | 神雾环保技术股份有限公司 | A kind of system of production of calcium carbide from its residue |
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