CN106629805A - Method and device for producing calcium nitrate liquid - Google Patents
Method and device for producing calcium nitrate liquid Download PDFInfo
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- CN106629805A CN106629805A CN201610903619.2A CN201610903619A CN106629805A CN 106629805 A CN106629805 A CN 106629805A CN 201610903619 A CN201610903619 A CN 201610903619A CN 106629805 A CN106629805 A CN 106629805A
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- calcium nitrate
- nitrate liquid
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- muddy water
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/36—Nitrates
- C01F11/38—Preparation with nitric acid or nitrogen oxides
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Abstract
The invention discloses a method and a device for producing calcium nitrate liquid and relates to the technical field of calcium nitrate liquid production. The method includes the steps of feeding tail gas produced by limestone and a high-concentration nitric acid solution into the bottom of an absorption tower, enabling the tail gas to be in countercurrent contact with lime milk, discharging the tail gas out of the top of the absorption tower, cyclically absorbing the lime milk and discharging the lime milk to a neutralizing tank; enabling overflowed crude calcium nitrate to react with the lime milk prior to that calcium nitrate clear liquid enters a calcium nitrate liquid tank, subjecting thick mud to filter pressing, feeding filtrate into the calcium nitrate liquid tank through a temporary storage tank, washing filter residues by processing condensate water after a filter press is full of the filter residues, enabling mud washing water to enter the temporary storage tank and then a mud washing water tank through a temporary storage pump, and enabling the mud washing water to enter a lime slaker for slaking or enter an acid mixing tank to be mixed with the high-concentration dilute nitric acid; enabling acid in the acid mixing tank to enter the bottom of a reaction tower through an acid pump. The method has the advantages of less pollution discharge, low raw material consumption and low energy consumption.
Description
Technical field
The present invention relates to calcium nitrate liquid production technical field, more particularly to a kind of dust technology and limestone neutralization reaction production
The method and its device of calcium nitrate liquid.
Background technology
In the technique of production calcium nitrate or calcium ammonium nitrate, first have to produce qualified calcium nitrate liquid.Calcium nitrate liquid be by
Dust technology and limestone are in reactive tank after neutralization reaction, then adjust PH to qualified with quick lime in neutralization chamber, then pass through
Pressure filter filter pressing produces clear liquid, as qualified calcium nitrate liquid.
However, existing dust technology reacts with limestone suffering from the drawback that in the technique for producing calcium nitrate liquid：（1）Reaction
Slot structure is simple, and material reaction is insufficient, and reacted tail gas tobacco is big, and tail gas does not process discharge, and contamination is serious,
Supplies consumption simultaneously is big：（2）High concentration nitric acid cannot be used, it is seriously polluted, consume high：（3）Reactive tank thick calcium nitrate out
Liquid quick lime directly adjusts PH, and response speed is slow and quick lime reaction is insufficient, and consumption of quicklime is big；（4）After adjusting PH
Thick calcium nitrate liquid all carries out filter pressing to produce calcium nitrate clear liquid by pressure filter, causes pressure filter operating load big, and works as
Filter pressing is difficult when slightly calcium nitrate liquid concentration is higher, or even is unable to positive normal pressure filter；（5）The filtering residue produced after filter pressing is straight without washing
Outer row is met, environment has not only been polluted but also has been increased consumption, when cleaning mixture to be returned the reuse in calcium nitrate liquid, calcium nitrate liquid can be reduced dense
Degree, follow-up workshop section's high energy consumption.
In order to solve the drawbacks described above of prior art presence, the production method and its dress of a kind of calcium nitrate liquid of present invention research and development
Put.
The content of the invention
It is an object of the invention to provide a kind of method for producing calcium nitrate liquid.
It is a further object to provide the device of production calcium nitrate liquid.
The present invention is achieved by the following technical solutions：
A kind of method for producing calcium nitrate liquid, step is：
（1）By limestone and high concentration salpeter solution in reaction tower counter current contacting, react the tail gas for generating and introduced with air-introduced machine and inhale
Tower bottom is received, lime cream absorbs the sour gas in tail gas, tail gas from absorption tower top down spray and tail gas counter current contacting
Discharge from absorption tower top, lime cream cyclic absorption heel row is to neutralization chamber；
（2）The thick calcium nitrate liquid that reaction tower overflow goes out enters neutralization chamber after coarse filter filtration, and calcium nitrate liquid is anti-with lime cream
Should adjust after PH and be clarified into defecator；
（3）Defecator top calcium nitrate clear liquid out enters calcium nitrate liquid bath, and the thickened drilling fluid of bottom is entered to be washed in mud groove, Jing pressures
After filter filter pressing, filtrate is re-fed into calcium nitrate liquid bath by temporary tank, and the calcium nitrate liquid in calcium nitrate liquid bath passes through calcium nitrate liquid
Pump workshop section backward；
（4）After filter residues of press filter pressure is full, stop into thickened drilling fluid, washing filtering residue is carried out by technique hot condensed water, be washed out
Wash muddy water and enter temporary tank, washing is stopped after filtering residue wash clean；Muddy water of washing in temporary tank washes muddy water by temporary pump entrance
Groove, the muddy water of washing washed in muddy water groove respectively enters ashing melting machine ashing or into the dilute nitre with acid tank with high concentration by washing muddy water pump
Sour complex acid；Reaction tower bottom is entered by sour pump with the acid prepared in acid tank and is neutralized reaction with the limestone in reaction tower.
Further, the device of said method is completed, including the absorption tower, reaction tower, neutralization chamber, the clarification that are sequentially connected
Groove, wash mud groove, pressure filter, temporary tank, wash muddy water groove, with acid tank, calcium nitrate liquid bath；Wherein absorption tower is by absorption pump and neutralization
Groove connects, and is connected with reaction tower by blower fan, and is connected with liming still and ashing melting machine in turn；Reaction tower is connected by coarse filter
Neutralization chamber；Neutralization chamber connects defecator by neutralization pump, and is connected with liming still and ashing melting machine in turn；Defecator also with nitric acid
Calcium liquid bath connects；Wash mud groove to be connected with pressure filter by filter pressing pump；Temporary tank is connected respectively by temporary pump washes muddy water groove and nitre
Sour calcium liquid bath；Wash muddy water groove and connected respectively with acid tank and ashing melting machine by washing muddy water pump；Calcium nitrate liquid bath is connected with calcium nitrate liquid
Pump.
Further, described reaction tower is also associated with elevator.
Limestone of the present invention is all recovered to suction with dust technology in the tail gas air-introduced machine that reaction tower counter current contacting is reflected
Tower is received, top behind absorption tower is passed into from bottom and is discharged；Absorption pump gets to absorption the lime cream circulation from liming still
Top of tower is sprayed and tail gas counter current contacting downwards, the sour gas in tail gas is absorbed, in absorption tower after lime cream cyclic absorption
Neutralization chamber, i.e. reaction tower tail gas out is drained into after blower fan is all reclaimed into absorption tower, is not to be absorbed with water but sharp
Carried out absorbing sour gas therein with lime cream, good absorbing effect, exhaust emissions is more cleaned；The thick nitre that reaction tower overflow goes out
Sour calcium liquid enters neutralization chamber after coarse filter filtration, and quick lime enters Calx with the lime cream that muddy water produces in ashing melting machine is washed
The lime cream of newborn groove, the lime cream on the calcium nitrate liquid absorption tower in neutralization chamber and liming still adjusts PH to after qualified, enters
Defecator is clarified；Defecator top calcium nitrate clear liquid out enters calcium nitrate liquid bath；The thickened drilling fluid row of defecator bottom
Enter and wash in mud groove, pressure filter is entered by filter pressing pump, the clear liquid being press-filtered out enters temporary tank by temporary pump also into calcium nitrate
Liquid bath, that is, the thick calcium nitrate liquid of muddiness for regulating PH is not all of producing calcium nitrate clear liquid using pressure filter filter pressing, but advanced
Entering defecator carries out clarification concentration, and the clear liquid on top is calcium nitrate liquid finished product, pressure filter only filter pressing defecator bottom it is dense
Thicker mud after contracting, this technique alleviates the load of pressure filter and accelerates speed of filter pressing has saved energy consumption；Nitric acid
Calcium nitrate liquid in calcium liquid bath is sent to rear workshop section by calcium nitrate liquid pump；After filter residues of press filter pressure is full, stop, into mud, being changed to work
Skill hot condensed water carries out washing filtering residue, and the muddy water of washing being washed out enters temporary tank, and washing is stopped after filtering residue wash clean, this
Bright use process condensate water carries out first washing filtering residue, it is ensured that filtering residue is totally discharged, not only reclaimed calcium nitrate liquid in filtering residue but also
Reduce pollution of the filtering residue to environment；Muddy water is washed by temporary pump into muddy water groove is washed, wash washing in muddy water groove in temporary tank
Muddy water respectively enters ashing melting machine ashing or into the dust technology complex acid with acid tank with high concentration by washing muddy water pump, improves nitric acid
The concentration of calcium liquid, reduces production cost effect fairly obvious to rear workshop section's energy saving consumption；Pass through with the acid prepared in acid tank
Sour pump enters reaction tower bottom and is neutralized reaction with the limestone in reaction tower.
Compared with prior art, the present invention has advantages below：
（1）Tail gas tobacco problem that can be after elimination reaction；
（2）Reacted using the dust technology of high concentration, the concentration of calcium nitrate liquid can be improved, reduced rear workshop section's energy and disappear
Consumption；
（3）Adjust PH and directly do not use using quick lime lime cream, the consumption of reduction quick lime；
（4）Adjust the thick calcium nitrate liquid after PH first to be clarified, clear liquor can be rear work directly as calcium nitrate liquid without filter pressing
Section is used, and is clarified the thickened drilling fluid for producing and is just used pressure filter filter pressing, and the load of pressure filter is mitigated significantly；
（5）Pressure filter produce filtering residue can washes clean, reduce disposal of pollutants, saved consumption of raw materials；
（6）The muddy water of washing of the low concentration that washing filtering residue is produced is comprehensively utilized, and in not directly entering calcium nitrate liquid, reduces rear workshop section
Energy resource consumption.
This invention removes reacted tail gas tobacco problem, reduces disposal of pollutants, consumption of raw materials amount is low, and energy consumption is low.
Description of the drawings
Fig. 1 is the structural representation of the device of present invention production calcium nitrate liquid；
In figure：1- absorption pumps, 2- absorption towers, 3- blower fans, 4- elevators, 5- reaction towers, 6- coarse filters, 7- liming stills, 8- are sour
In pump, 9- neutralization chambers, 10- and pump, 11- defecators, 12- to wash mud groove, 13- filter pressing pumps, 14- pressure filter, 15- temporary tanks, 16- temporary
Deposit pump, 17- and wash muddy water groove, 18- and wash muddy water pump, 19- with acid tank, 20- calcium nitrate liquid baths, 21- calcium nitrate liquid pumps, 22- ashing melting machines.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The device of production calcium nitrate liquid as shown in Figure 1, including the absorption tower 2, reaction tower 5, neutralization chamber 9 being sequentially connected,
Defecator 11, wash mud groove 12, pressure filter 14, temporary tank 15, wash muddy water groove 17, with acid tank 19, calcium nitrate liquid bath 20；Wherein absorb
Tower 2 is connected by absorption pump 1 with neutralization chamber 9, is connected with reaction tower 5 by blower fan 3, and is connected with liming still 7 in turn and is changed
Grey machine 22；Reaction tower 5 connects neutralization chamber 9 by coarse filter 6, and is connected with elevator 4；Neutralization chamber 9 is connected by neutralization pump 10
Defecator 11, and it is connected with liming still 7 and ashing melting machine 22 in turn；Defecator 11 is also connected with calcium nitrate liquid bath 20；Wash mud groove
12 are connected by filter pressing pump 13 with pressure filter 14；Temporary tank 15 is connected respectively by temporary pump 16 washes muddy water groove 17 and calcium nitrate liquid
Groove 20；Wash muddy water groove 17 and connected respectively with acid tank 19 and ashing melting machine 22 by washing muddy water pump 18；Calcium nitrate liquid bath 20 is connected with nitre
Sour calcium liquid pump 21.
Operationally, step is said apparatus：
（1）Limestone is sent into into the top of reaction tower 5 by elevator 4, dust technology is sent into into the bottom of reaction tower 5, limestone with it is dilute
Nitric acid reacts the tail gas for generating and introduces the bottom of absorption tower 2 with air-introduced machine 3 in reaction tower counter current contacting, and it is thick that the overflow of reaction tower 5 goes out
Calcium nitrate liquid enters neutralization chamber 9 after the filtration of coarse filter 6；
（2）Lime cream absorbs the sour gas in tail gas, tail gas from the top down of absorption tower 2 spray and tail gas counter current contacting
Discharge from absorption tower top, neutralization chamber 9 is drained into by absorption pump 1 after lime cream cyclic absorption；
（3）Calcium nitrate liquid adjusts PH with lime cream reaction in neutralization chamber 9, is clarified into defecator by neutralizing pump, on
Portion's calcium nitrate clear liquid out enters calcium nitrate liquid bath 20, and the thickened drilling fluid of bottom is entered to be washed in mud groove 12, the filter pressing of Jing pressure filter 14
Afterwards, filtrate is re-fed into calcium nitrate liquid bath 20 by temporary tank 15, and the calcium nitrate liquid in calcium nitrate liquid bath 20 passes through calcium nitrate liquid pump
21 are sent to rear workshop section；
（4）After the filtering residue of pressure filter 14 pressure is full, stop into thickened drilling fluid, washing filtering residue is carried out by technique hot condensed water, be washed out
Wash muddy water into temporary tank 15, washing is stopped after filtering residue wash clean, the muddy water of washing in temporary tank 15 is entered by temporary pump 16
Enter to wash muddy water groove 17, that what is washed in muddy water groove 17 washes muddy water by washing muddy water pump 18 and respectively enteing the ashing of ashing melting machine 22 or enter complex acid
Groove 19 and the dust technology complex acid of high concentration, the bottom of reaction tower 5 and reaction tower 5 are entered with the acid prepared in acid tank 19 by sour pump 8
In limestone be neutralized reaction.
Claims (3)
1. a kind of method for producing calcium nitrate liquid, it is characterised in that step is：
（1）By limestone and high concentration salpeter solution in reaction tower counter current contacting, react the tail gas for generating and introduced with air-introduced machine and inhale
Tower bottom is received, lime cream absorbs the sour gas in tail gas, tail gas from absorption tower top down spray and tail gas counter current contacting
Discharge from absorption tower top, lime cream cyclic absorption heel row is to neutralization chamber；
（2）The thick calcium nitrate liquid that reaction tower overflow goes out enters neutralization chamber after coarse filter filtration, and calcium nitrate liquid is anti-with lime cream
Should adjust after PH and be clarified into defecator；
（3）Defecator top calcium nitrate clear liquid out enters calcium nitrate liquid bath, and the thickened drilling fluid of bottom is entered to be washed in mud groove, Jing pressures
After filter filter pressing, filtrate is re-fed into calcium nitrate liquid bath by temporary tank, and the calcium nitrate liquid in calcium nitrate liquid bath passes through calcium nitrate liquid
Pump workshop section backward；
（4）After filter residues of press filter pressure is full, stop into thickened drilling fluid, washing filtering residue is carried out by technique hot condensed water, be washed out
Wash muddy water and enter temporary tank, washing is stopped after filtering residue wash clean；Muddy water of washing in temporary tank washes muddy water by temporary pump entrance
Groove, the muddy water of washing washed in muddy water groove respectively enters ashing melting machine ashing or into the dilute nitre with acid tank with high concentration by washing muddy water pump
Sour complex acid；Reaction tower bottom is entered by sour pump with the acid prepared in acid tank and is neutralized reaction with the limestone in reaction tower.
2. the device of claim 1 methods described is completed, it is characterised in that including the absorption tower, reaction tower, the neutralization that are sequentially connected
Groove, defecator, wash mud groove, pressure filter, temporary tank, wash muddy water groove, with acid tank, calcium nitrate liquid bath；Wherein absorption tower is by absorbing
Pump is connected with neutralization chamber, is connected with reaction tower by blower fan, and is connected with liming still and ashing melting machine in turn；Reaction tower is by thick
Filter connects neutralization chamber；Neutralization chamber connects defecator by neutralization pump, and is connected with liming still and ashing melting machine in turn；Defecator
Also it is connected with calcium nitrate liquid bath；Wash mud groove to be connected with pressure filter by filter pressing pump；Temporary tank is connected respectively by temporary pump washes mud
Tank and calcium nitrate liquid bath；Wash muddy water groove and connected respectively with acid tank and ashing melting machine by washing muddy water pump；Calcium nitrate liquid bath is connected with
Calcium nitrate liquid pump.
3. device according to claim 2, it is characterised in that described reaction tower is also associated with elevator.
Priority Applications (1)
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|---|---|---|---|
| CN201610903619.2A CN106629805B (en) | 2016-10-17 | 2016-10-17 | A kind of method and its device for producing calcium nitrate liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610903619.2A CN106629805B (en) | 2016-10-17 | 2016-10-17 | A kind of method and its device for producing calcium nitrate liquid |
Publications (2)
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| CN106629805A true CN106629805A (en) | 2017-05-10 |
| CN106629805B CN106629805B (en) | 2017-11-21 |
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| CN105347703A (en) * | 2015-12-03 | 2016-02-24 | 龙岩紫云化学科技有限公司 | Calcium magnesium carbonate salt mine decomposition method |
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| Publication number | Publication date |
|---|---|
| CN106629805B (en) | 2017-11-21 |
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