CN109574046A - A method of soda ash is produced by raw material of a variety of by-products - Google Patents
A method of soda ash is produced by raw material of a variety of by-products Download PDFInfo
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Abstract
The invention discloses a kind of methods for producing soda ash as raw material using a variety of by-products, comprising: brine section inhales ammonia process, carbonation process, light ash process, ashing process and steams suction process.Method provided by the invention, with potash fertilizer produce in by-product tail salt, from the liquefied ammonia recycled in raw coke oven gas, the CaO of by-product in carbide slag and the calcium carbide production of outlet in Production of PVC, in calcium carbide production by-product CO2With the CO discharged in methanol production2Gas is raw material, produces soda ash, not only solves tail salt, carbide slag and CaO and CO2Problem of environmental pollution caused by discharge also improves tail salt, carbide slag and CaO and CO2Recycling value, reduce the freight of outsourcing ammonia and the danger of a large amount of storage and transportations；The present invention uses a variety of by-products to produce soda ash for raw material, greatly reduces the consumption of salt in soda manufacture, lime stone and coke, realizes the saving and sustainable development of resource, achieved the purpose that waste and old resource cycling and reutilization.
Description
Technical field
The invention belongs to the disposal of three wastes and technical field of comprehensive utilization, are with a variety of by-products more particularly, to one kind
The method of raw material production soda ash.
Background technique
Potash fertilizer in process of production can a large amount of tail salt of by-product, content >=85.5% of NaCl in tail salt, one ton of production
Potash fertilizer about generates 2 tons of tail salt.The method squeezing into designated place and being stored up is mostly used to the processing of tail salt at present, this is not
The recovery utilization rate to tail salt is only greatly reduced, meanwhile, the discharge accumulation of tail salt also causes great pollution to environment.
During acetylene method produces polyvinyl chloride, a large amount of carbide slag can be given off, Ca (OH) is mainly become2.It is raw
One ton of Corvic is produced, about 6 tons of carbide slag of generation (folding 100%Ca (OH)2It calculates).Carbide slag is mainly used for giving birth at present
Cement and flyash manufacturing bricks by mixing or stacking are produced, this greatly reduces the utility value of carbide slag.
Calcium carbide CaC2It needs to use coke and CaO as raw material in production, therefore to be furnished with limekiln in calcium carbide production, use
Quick lime CaO and CO are generated in calcined limestone2Gas.And in calcium carbide production, there are strict requirements, granularity to the granularity of CaO
It is excessive, it will cause that its contact area is small, and reaction speed is low, influence the yield of calcium carbide, undersized, lime is easy weathering, causes
It builds the pressure in furnace, influences calcium carbide production.Therefore, often the calcium carbide that is used for that granularity in the CaO of calcining generation is 10-50mm is produced, and
Then being screened out for granularity < 10mm comes, and abandons.Meanwhile producing the calcium carbide device meeting by-product 28%-35% of 800,000 tons of calcium carbides per year
CO2370,000 tons/year of gas, these CO2Gas, which is discharged into air, can cause many environmental problems.In addition, in refining coke process
In, a large amount of raw coke oven gas, raw coke oven gas rectifiable liquefied ammonia out after gas purification process can be generated.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of using a variety of by-products as the method for raw material production soda ash, with
Achieve the purpose that improve tail salt, carbide slag, the recycling value of calcium oxide and protection environment.
In order to solve the above technical problem, the present invention provides following technical solutions:
A method of soda ash is produced by raw material of a variety of by-products, comprising:
Step S1: brine section, using potash fertilizer produce in by-product tail salt as crude salt needed for soda manufacture, to institute
It states tail salt to be dissolved in water, saturation crude brine is made, then removal of impurities processing is carried out to the saturation crude brine, refined salt is made
Water；
Step S2: ammonia process is inhaled, using the liquefied ammonia recycled from raw coke oven gas as ammonia medium needed for soda manufacture, institute
It states after refined brine absorbs ammonia and generates ammonial brine；
Step S3: carbonation process makes the ammonial brine and CO2Gas carries out carbonation reaction, and it is suspended to generate sodium bicarbonate
Liquid obtains natrii bicarbonas filter cake and containing NH after filtering4The liquid of Cl；
Step S4: light ash process carries out the natrii bicarbonas filter cake to calcine obtained soda ash；
Step S5: ashing process, with the CaO of by-product in the carbide slag of outlet in Production of PVC and/or calcium carbide production
For raw material, milk of lime is prepared；
Step S6: it steams and inhales process, so that the milk of lime is reacted with the liquid containing NH4Cl, heat the ammonia steamed and return
The suction ammonia process is returned to recycle.
Preferably, the removal of impurities processing in step S1 includes: that the ashing process is added into the saturation crude brine
Soda ash obtained in the milk of lime of middle preparation and light ash process, to remove the HCO in the saturation crude brine3 -、Mg2+、Ca2+It is miscellaneous
Matter.
Preferably, the liquefied ammonia recycled from raw coke oven gas is directly pipelined to the suction ammonia process.
According to embodiment of the present invention, wherein further include compression section, using calcium carbide produce in by-product CO2
With the CO discharged in methanol production2Gas is as CO in the carbonation process2The source of gas, to CO2Gas carries out concentration adjusting
After be sent into compressor compresses, compressed CO2Gas is sent to the carbonation process.
Preferably, using Steam Turbine Driven compressor to CO2Gas is compressed, and the lack of gas generated after steam turbine acting are sent
It steams and inhales process recycling.
Preferably, the CO generated in light ash process calcination process2Gas returns to the compression section and recycles.
Preferably, in the calcium carbide production by-product CO2It needs to carry out cleaning dust processing before entering compressor.
Preferably, to CO2Gas is sent into compressor compresses after carrying out concentration adjusting, comprising:
A. the CO come is conveyed to from calcium carbide production and methanol production2Gas carries out obtaining concentration >=40% after flow is mixed
With the CO of >=85% two kinds of various concentrations2Gas；
B. by concentration >=40%CO2The middle section that gas is sent into compressor is compressed, and middle section gas is obtained, by concentration >=85%
CO2The lower section that gas is sent into compressor is compressed, and lower section gas is obtained；
C. by the middle part of middle section pneumatic transmission carbonators into carbonation process, by lower section pneumatic transmission carbon into carbonation process
Change the lower part of tower.
According to embodiment of the present invention, wherein it further include heavy ash process, it will be obtained pure in the light ash process
Alkali is sent to hydration machine, monohydrated sodium carbonate is made, then carry out high-temperature calcination to monohydrated sodium carbonate, heavy soda ash is made.
According to embodiment of the present invention, wherein further include calcium chloride process, by what is generated in the steaming suction process
Evaporated waste ammonia liquid is sent to calcium chloride device after evaporating enrichment, produces calcium chloride.
Compared with the existing technology, a kind of method producing soda ash as raw material using a variety of by-products provided by the invention, with potassium
The tail salt of by-product in fertilizer production, the CaO of by-product is raw material, production in the carbide slag of outlet and calcium carbide production in Production of PVC
Soda ash not only solves problem of environmental pollution caused by tail salt, carbide slag and CaO, also improves tail salt, carbide slag and CaO
Recycle value；The liquefied ammonia recycled from raw coke oven gas, which is directly pipelined to, inhales ammonia process, reduces the fortune of outsourcing ammonia
The danger of defeated expense and a large amount of storage and transportations；Using calcium carbide produce in by-product CO2With the CO discharged in methanol production2Gas is as institute
State CO in carbonation process2The source of gas, reduces CO2The discharge of gas；It is pure that the present invention uses a variety of by-products to produce for raw material
Alkali greatly reduces the consumption of salt in soda manufacture, lime stone and coke, realizes the saving and sustainable development of resource, reaches
The purpose of waste and old resource cycling and reutilization is arrived.
Detailed description of the invention
Fig. 1 is the process flow chart provided by the invention that soda ash is produced by raw material of a variety of by-products.
Fig. 2 is the process flow chart for including compression section, heavy ash process and calcium chloride process.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, and reference label refers to the group in the present invention
Part, technology, realizing under appropriate circumstances so as to advantages and features of the invention can be easier to be understood.Following description is pair
The materialization of the claims in the present invention, and other specific implementations not clearly stated relevant to claim also belong to power
The range that benefit requires.
Ammonia-soda process soda manufacture is a kind of most commonly used soda manufacture method of current soda manufacture industrial application, is with original
Salt and quick lime CaO are primary raw material, ammonia as intermediary, and salt water is inhaled ammonia, carbonization obtains sodium bicarbonate and ammonium chloride is female
Liquid obtains soda ash product using filter calcining.
Fig. 1 shows the process flow chart provided by the invention that soda ash is produced using a variety of by-products as raw material.
As shown in Figure 1, a kind of method for producing soda ash as raw material using a variety of by-products, comprising: brine section inhales ammonia work
The big process of process six is inhaled in sequence, carbonation process, light ash process, ashing process and steaming, is specifically comprised the following steps:
Step S1: brine section, using potash fertilizer produce in by-product tail salt as crude salt needed for soda manufacture, to institute
It states tail salt to be dissolved in water, saturation crude brine is made, then removal of impurities processing is carried out to the saturation crude brine, refined salt is made
Water.
Potash fertilizer production is using carnallite as raw material, using cold crystallization-direct flotation method, reverse flotation-cold junction crystallization and hot melt
Etc. techniques potash fertilizer is made, that is, industrial potassium chloride is produced due to also containing a large amount of sodium chloride in carnallite in potash fertilizer
By-product in the process, largely the tail salt (NaCl >=85.5%) containing NaCl, the present invention use the tail salt to be dissolved in water for raw material,
Saturation crude brine is made.
In the saturation crude brine, main matter NaCl, while also containing HCO3 -、Mg2+、Ca2+Impurity, it is therefore desirable to right
Saturation crude brine carries out removal of impurities processing, refined brine is made.
Step S2: ammonia process is inhaled, using the liquefied ammonia recycled from raw coke oven gas as ammonia medium needed for soda manufacture, institute
It states after refined brine absorbs ammonia and generates ammonial brine.
It is 0.005 ton (one ton of soda ash of production needs external liquefied ammonia amount) according to soda ash device liquefied ammonia unit consumption amount, then producing per year
1000000 tons of soda ash device needs 5000 tons of liquefied ammonia.According to the requirement of production soda ash, by what is come out from coking plant coke oven
99.9% liquefied ammonia recycled in raw coke oven gas is transported in the ammonia absorption tower for inhaling ammonia process, makees the utilization of ammonia communication medium recycling.
The liquefied ammonia recycled from raw coke oven gas is directly pipelined to the suction ammonia work by method provided by the invention
Sequence.Since liquefied ammonia belongs to the significant risk source of chemical industry, according to the requirement of production soda ash, the liquefied ammonia recycled from raw coke oven gas
It is directly pipelined to and inhales in ammonia process, that is, reduce the freight of outsourcing ammonia, and reduce a large amount of storage and transportations in producing region
Danger.
Step S3: carbonation process makes the ammonial brine and CO2Gas carries out carbonation reaction, and it is suspended to generate sodium bicarbonate
Liquid obtains natrii bicarbonas filter cake and containing NH after filtering4The liquid of Cl.
Specifically, the ammonial brine enters in tower from the top of carbonators, and CO in carbonators2Gas is from carbonators
Lower part enter, ammonial brine contacts with the back flow of gas of rising, occurs carbonation reaction (being commonly called as being carbonized), reaction equation are as follows:
NaCl+NH3+CO2+H2O=NaHCO3+NH4NaHCO is precipitated after reaching saturation in Cl3Crystal obtains NaHCO3Suspension uses chlor-alkali
Natrii bicarbonas filter cake is obtained after machine filtering and containing NH4The liquid of Cl.Carbonation reaction is exothermic reaction, therefore is set in the lower part of tower
There is shell and tube cooling water tank, removes reaction heat with recirculated water.
Step S4: light ash process carries out the natrii bicarbonas filter cake to calcine obtained soda ash.
Light grey calcining furnace (heat source is steam) interior heat resolve is sent in the natrii bicarbonas filter cake that carbonation process is obtained by filtration, is forged
Burning temperature is 170-190 DEG C, and soda ash is made, this soda ash is light soda ash, key reaction NaHCO3=Na2CO3+H2O+CO2↑,
Meanwhile there are also be accompanied by secondary response, NH4HCO3=NH3↑+H2O+CO2↑, it is light that the direct cooling packing of the light soda ash of production obtains commodity
Matter soda ash is used for export trade.
Step S5: ashing process, with the CaO of by-product in the carbide slag of outlet in Production of PVC and/or calcium carbide production
For raw material, milk of lime is prepared.
Carbide slag is exactly Ca (OH)2Solution, the carbide slag of outlet from Production of PVC are adjusted according to production technology and are flowed
After amount, it is directly blended into ashing process by pipeline, does not need to be watered ashing.And the CaO of by-product need to be in ashing melting machine in calcium carbide production
It is interior to be reacted with water, that is, it is watered ashing, CaO+H2O=Ca (OH)2, it is prepared into milk of lime.
Step S6: steaming and inhale process, makes the milk of lime and contains NH4The liquid of Cl reacts, and heats the ammonia steamed and returns
The suction ammonia process is returned to recycle.
What is generated in carbonation process contains NH4The liquid of Cl reacts on perforated plate column with milk of lime, NH4Cl+Ca(OH)2
=CaCl2+NH3↑+H2O returns to the ammonia absorption tower recycling for inhaling ammonia process with the ammonia that steam steams.
Method provided by the invention, wherein the removal of impurities processing in step S1 includes: to add into the saturation crude brine
Enter soda ash obtained in the milk of lime and light ash process prepared in the ashing process, to remove in the saturation crude brine
HCO3 -、Mg2+、Ca2+Impurity.
In the present invention, using lime-soda method except the impurity (HCO in desaturation crude brine3 -、Mg2+、Ca2+) refined salt is made
Water, reaction are as follows: Ca (OH)2+2HCO3 -=CaCO3↓+2H2O、Ca(OH)2+MgCl2=Mg (OH)2↓+CaCl2、Ca(OH)2+
MgSO4=Mg (OH)2↓+CaSO4、CaSO4+Na2CO3=CaCO3↓+Na2SO4、CaCl2+Na2CO3=CaCO3↓+NaCl。
Fig. 2 shows the process flow charts for including compression section, heavy ash process and calcium chloride process.
As shown in Fig. 2, method provided by the invention, wherein further include compression section, using calcium carbide produce in by-product
CO2With the CO discharged in methanol production2Gas is as CO in the carbonation process2The source of gas, to CO2Gas carries out concentration
Compressor compresses, compressed CO are sent into after adjusting2Gas is sent to the carbonation process.
The CO of by-product in calcium carbide production2Concentration is 28-35%, the CO discharged in methanol production2Gas concentration is two kinds, high
Concentration C O2Gas >=97% and low concentration CO2Gas 85%~97%, the CO of the high-concentration and low-concentration of by-product2Gas can transport pure
Unstripped gas of the alkali device as production soda ash.But the low concentration CO discharged in methanol production2Contain H in gas2S、CO、H2Deng
Component belongs to toxic inflammable gas, need to be transported to soda ash device, underproof low concentration after in-line analyzer detects qualification
CO2Gas release processing.
Method provided by the invention, using Steam Turbine Driven compressor to CO2Gas is compressed, and is produced after steam turbine acting
Raw lack of gas are sent steaming to inhale process and are recycled.Lack of gas are the steam that secondary can be used, and the lack of gas generated after steam turbine acting send steaming
It inhales process to recycle as steam, meets the requirement of energy-saving and emission-reduction.
Method provided by the invention, wherein the CO generated in light ash process calcination process2Gas returns to the compression section
It recycles.The CO that light ash process calcining furnace generates2Gas concentration >=85% returns to carbonation process after cooling, compression and recycles.
Method provided by the invention, the CO of by-product in calcium carbide production2It needs to carry out cleaning dust before entering compressor
Processing.
The CO of by-product in calcium carbide production2It is the kiln gas sent from limekiln, a large amount of dust is contained in the inside, compresses entering
Before machine, gas washing tower, cyclone separator, electric precipitation and water mist separation dust separation need to be passed through, be less than kiln gas dustiness
20mg/m3After be transported to compression section.And the CO of methanol device by-product2Output is in low-temp methanol equipment, the CO of output2It does not need
Dedusting washing.
Method provided by the invention, to CO2Gas is sent into compressor compresses after carrying out concentration adjusting, comprising:
A. the CO come is conveyed to from calcium carbide production and methanol production2Gas carries out obtaining concentration >=40% after flow is mixed
With the CO of >=85% two kinds of various concentrations2Gas；
B. by concentration >=40%CO2The middle section that gas is sent into compressor is compressed, and middle section gas is obtained, by concentration >=85%
CO2The lower section that gas is sent into compressor is compressed, and lower section gas is obtained；
C. by the middle part of middle section pneumatic transmission carbonators into carbonation process, by lower section pneumatic transmission carbon into carbonation process
Change the lower part of tower.
Middle section gas is the CO of low concentration2Gas, is sent to the middle part of carbonators, and lower section gas is the CO of high concentration2Gas is sent to
The lower part of carbonators.In carbonators, ammonial brine enters in tower from the top of tower, first absorbs the CO of low concentration2Gas generates pre-
Carbodiimide solution, pre- carbodiimide solution again with the CO of high concentration2Gas carries out carbonation reaction, generates sodium bicarbonate suspension.
Method provided by the invention, wherein further include heavy ash process, soda ash obtained in the light ash process is sent to water
Conjunction machine is made monohydrated sodium carbonate, then carries out high-temperature calcination to monohydrated sodium carbonate, and heavy soda ash is made.
Temperature from Qing Hui workshop section is that 170~190 DEG C of high temperature light soda ash is sent to hydration machine, using solid phase hydration process
Monohydrated sodium carbonate crystal is made, reaction equation is as follows: Na2CO3(S)+H2O (l)=Na2CO3·H2O (S), the monohydrated sodium carbonate of generation
It is dried into the grey calcining furnace of weight, resulting product is heavy soda ash.The bulk density and granularity of heavy soda ash all compare lightweight
Soda ash is big.Heavy soda ash is mainly used in the fields such as high-grade float glass, synthetic detergent, glass kinescope, and dosage is year by year
Rise, the production line of heavy soda ash is additionally arranged by customer demand, adjusts light soda ash and heavy soda ash by the demand of market user
Proportion of production.
Method provided by the invention, wherein further include calcium chloride process, by the evaporated waste ammonia liquid for steaming and inhaling and being generated in process
It is sent to calcium chloride device after evaporating enrichment, produces calcium chloride.
If the evaporated waste ammonia liquid generated after production soda ash is not used, the waste of resource and the pollution of environment will cause,
Therefore under the conditions of the present invention is using the distinctive geographical location in salt lake and weather, evaporated waste ammonia liquid is discharged into natural Great Salt lake pond
In, enrichment after solarization is first evaporated, CaCl is worked as2Calcium Chloride Production device is transported to when≤15%, NaCl ≈ 10% again, produces chlorination
Calcium, solvay liquor are turned waste into wealth, and environmental pollution is reduced.
Soda ash is important one of industrial chemicals, is widely used in glass, ceramics, papermaking, chemical industry and metallurgy etc., I
State is the big country for producing soda ash, produces the process relation of soda ash to the cost and quality of production soda ash.The present invention relies on Qinghai bavin
Soda ash is produced up to the byproduct tail salt after potassium chloride is produced in tub ground with salt lake resources, obtains the tail salt of outlet after producing potash fertilizer
To effective use, wherein annual 1500000 tons of tail salt (NaCl >=85.5wt%) of by-product in Salt Lake Potash production system, are produced by soda ash
1,000,000 tons/year of calculating of energy, according to the reaction equation of production soda ash: 2NaCl~Na2CO3, annual soda ash device can utilize tail salt 129
Ten thousand tons, utilization rate is up to 86%；Simultaneously in the PVC Production Process in the magnesium metal integrated industrial garden of salt lake outlet calcium carbide
The high concentration CO discharged in slag, methanol device production2Tail gas and calcium carbide device limekiln the produced CaO and CO of calcined limestone2Based on
Want raw material, the ammonia recycled using coking plant as intermediary, can by garden soda ash device, calcium carbide device, PVC device,
Methanol device, coking plant organically combine, and form the product chain of a variety of byproduct comprehensive utilizations in garden, realize and push away
Sustainable development, development into Caidamu Basin salt lake mineral resources are recycled with the salt chemical engineering of " by-pass " of " the sodium utilization of resources " and are passed through
Ji, achievees the purpose that waste and old salt lake resources cycling and reutilization.
In the present invention, ashing is carried out using the carbide slag that PVC device in garden produces, carbide slag (folding can be reduced every year
100%Ca (OH)2) 3,230,000 tons/year of discharge (producing ten thousand tons/year of PVC50 calculating by acetylene method), while carbide slag contains 40% water,
It is possible thereby to save 2,150,000 tons/year of water consumption of soda ash device ashing.In the present invention, (800,000 are produced per year using calcium carbide device in garden
Ton calcium carbide), it produces the lime having more than needed after calcium carbide and send soda ash device, lime 1500t can be conveyed toward soda ash device daily, wherein to total
The composition of calcium oxide (TCaO) requires >=78% (wt%).
In addition, the high concentration CO discharged in methanol device production2550,000 tons/year of tail gas, calcium carbide device by-product 28-35%'s
CO2370,000 tons/year of gas, it is sent to soda ash device carbonation process after compression is cooling for soda manufacture, it is dirty not only to reduce environment
Dye, while water-saving and electricity-saving, these can be such that production cost substantially reduces.Utilize 99.9% recycled in coking plant raw coke oven gas
Liquefied ammonia, reduces the outsourcing freight of outsourcing ammonia and the danger of a large amount of storage and transportations of within battery limit by 5000 tons of annual consumption of soda ash device liquefied ammonia
Danger forms big industrial chain, realizes the important ring that circular economy in garden, few discharge, fecund go out.
Compared with the existing technology, a kind of method producing soda ash as raw material using a variety of by-products provided by the invention, with potassium
The tail salt of by-product in fertilizer production, the CaO of by-product is raw material, production in the carbide slag of outlet and calcium carbide production in Production of PVC
Soda ash not only solves problem of environmental pollution caused by tail salt, carbide slag and CaO, also improves tail salt, carbide slag and CaO
Recycle value；The liquefied ammonia recycled from raw coke oven gas, which is directly pipelined to, inhales ammonia process, reduces the fortune of outsourcing ammonia
The danger of defeated expense and a large amount of storage and transportations；Using calcium carbide produce in by-product CO2With the CO discharged in methanol production2Gas is as institute
State CO in carbonation process2The source of gas, reduces CO2The discharge of gas；It is pure that the present invention uses a variety of by-products to produce for raw material
Alkali greatly reduces the consumption of salt in soda manufacture, lime stone and coke, realizes the saving and sustainable development of resource, reaches
The purpose of waste and old resource cycling and reutilization is arrived.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and this
Field technical staff can be designed alternative embodiment without departing from the scope of the appended claims.In claim
In, any reference symbol between parentheses should not be configured to limitations on claims.
Claims (10)
1. a kind of method for producing soda ash as raw material using a variety of by-products characterized by comprising
Step S1: brine section, using potash fertilizer produce in by-product tail salt as crude salt needed for soda manufacture, to the tail
Salt is dissolved in water, and saturation crude brine is made, then carry out removal of impurities processing to the saturation crude brine, refined brine is made；
Step S2: ammonia process is inhaled, using the liquefied ammonia recycled from raw coke oven gas as ammonia medium needed for soda manufacture, the essence
Ammonial brine is generated after Saline Absorbent ammonia；
Step S3: carbonation process makes the ammonial brine and CO2Gas carries out carbonation reaction, generates sodium bicarbonate suspension, mistake
Natrii bicarbonas filter cake is obtained after filter and containing NH4The liquid of Cl；
Step S4: light ash process carries out the natrii bicarbonas filter cake to calcine obtained soda ash；
Step S5: ashing process, the CaO with by-product in the carbide slag of outlet in Production of PVC and/or calcium carbide production is original
Material, prepares milk of lime；
Step S6: steaming and inhale process, makes the milk of lime and contains NH4The liquid of Cl reacts, and heats described in the ammonia return steamed
Ammonia process is inhaled to recycle.
2. the method according to claim 1, wherein the removal of impurities processing in step S1 includes: to described full
With soda ash obtained in the milk of lime and light ash process prepared is added in the ashing process in crude brine, to remove the saturation
HCO in crude brine3 -、Mg2+、Ca2+Impurity.
3. the method according to claim 1, wherein it is defeated that the liquefied ammonia recycled from raw coke oven gas is directly passed through pipeline
It is sent to the suction ammonia process.
4. the method according to claim 1, wherein further include compression section, using calcium carbide produce in by-product
CO2With the CO discharged in methanol production2Gas is as CO in the carbonation process2The source of gas, to CO2Gas carries out concentration
Compressor compresses, compressed CO are sent into after adjusting2Gas is sent to the carbonation process.
5. according to the method described in claim 4, it is characterized in that, using Steam Turbine Driven compressor to CO2Gas is pressed
Contracting, the lack of gas generated after steam turbine acting are sent steaming to inhale process and are recycled.
6. according to the method described in claim 4, it is characterized in that, the CO generated in light ash process calcination process2Gas returns to institute
State compression section recycling.
7. according to the method described in claim 4, it is characterized in that, the calcium carbide production in by-product CO2Before entering compressor
It need to carry out cleaning dust processing.
8. according to the method described in claim 4, it is characterized in that, to CO2Gas is sent into compressor pressure after carrying out concentration adjusting
Contracting, comprising:
A. the CO come is conveyed to from calcium carbide production and methanol production2Gas carry out flow mix after obtain concentration >=40% and >=
The CO of 85% two kinds of various concentrations2Gas；
B. by concentration >=40%CO2The middle section that gas is sent into compressor is compressed, and middle section gas is obtained, by concentration >=85%CO2Gas
The lower section that body is sent into compressor is compressed, and lower section gas is obtained；
C. by the middle part of middle section pneumatic transmission carbonators into carbonation process, by lower section pneumatic transmission carbonators into carbonation process
Lower part.
9. will be made in the light ash process the method according to claim 1, wherein further including heavy ash process
Soda ash be sent to hydration machine, be made monohydrated sodium carbonate, then to monohydrated sodium carbonate carry out high-temperature calcination, be made heavy soda ash.
10. the steaming is inhaled in process and is produced the method according to claim 1, wherein further including calcium chloride process
Raw evaporated waste ammonia liquid is sent to calcium chloride device after evaporating enrichment, produces calcium chloride.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112850754B (en) * | 2021-01-26 | 2023-02-07 | 青海盐湖工业股份有限公司 | Soda ash and magnesium alkali co-production system and co-production method |
| CN113753923A (en) * | 2021-10-11 | 2021-12-07 | 浙江志澄环境资源科技有限公司 | Alkali making process for preparing ammonia gas and carbon dioxide by using carbide slag reaction for dual-cycle utilization |
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