CN106629805B - A kind of method and its device for producing calcium nitrate liquid - Google Patents
A kind of method and its device for producing calcium nitrate liquid Download PDFInfo
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- CN106629805B CN106629805B CN201610903619.2A CN201610903619A CN106629805B CN 106629805 B CN106629805 B CN 106629805B CN 201610903619 A CN201610903619 A CN 201610903619A CN 106629805 B CN106629805 B CN 106629805B
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- calcium nitrate
- nitrate liquid
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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 kind of method and its device for producing calcium nitrate liquid, it is related to calcium nitrate liquid production technical field.A kind of method for producing calcium nitrate liquid, step are：The tail gas of lime stone and high concentration salpeter solution generation is introduced into absorb the bottom of the tower, with milk of lime counter current contacting, tail gas is discharged at the top of absorption tower, milk of lime cyclic absorption heel row to neutralization chamber；The thick calcium nitrate liquid that overflow goes out reacts with milk of lime, calcium nitrate clear liquid enters calcium nitrate liquid bath, thickened drilling fluid press filtration, filtrate is re-fed into calcium nitrate liquid bath by temporary tank, after filter residues of press filter pressure is full, technique hot condensed water washing filter residue, washes muddy water and enter temporary tank, muddy water groove is washed by temporary pump entrance, the dust technology complex acid of ashing melting machine ashing or entrance with acid tank and high concentration is respectively enterd by washing muddy water pump；Reaction tower bottom is entered by sour pump with the acid prepared in acid tank.The present invention reduces disposal of pollutants, consumption of raw materials amount is low, and energy consumption is low.
Description
Technical field
The present invention relates to calcium nitrate liquid production technical field, more particularly to a kind of dust technology produces with lime stone neutralization reaction
The method and its device of calcium nitrate liquid.
Background technology
In the technique for producing calcium nitrate or calcium ammonium nitrate, first have to produce qualified calcium nitrate liquid.Calcium nitrate liquid be by
Dust technology and lime stone adjust PH to qualified in reactive tank after neutralization reaction, then in neutralization chamber with quick lime, then pass through
Filter press press filtration produces clear liquid, as qualified calcium nitrate liquid.
Had the following disadvantages however, existing dust technology reacts with lime stone in the technique of production 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 handle discharge, and contamination is serious,
Supplies consumption simultaneously is big：（2）High concentration nitric acid can not be used, seriously polluted, consumption is high：（3）The thick calcium nitrate that reactive tank comes out
Liquid directly adjusts PH with quick lime, and reaction 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 press filtration to produce calcium nitrate clear liquid by filter press, causes filter press operating load big, and work as
Press filtration is difficult when slightly calcium nitrate liquid concentration is higher, or even is unable to positive normal pressure filter；（5）Caused filter residue is straight without washing after press filtration
Outer row is met, environment has not only been polluted but also has increased consumption, when reuse during cleaning solution is returned into calcium nitrate liquid, it is dense that calcium nitrate liquid can be reduced
Degree, follow-up workshop section's high energy consumption.
In order to solve drawbacks described above existing for prior art, the present invention researches and develops a kind of production method and its dress of calcium nitrate liquid
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 are：
（1）By lime stone and high concentration salpeter solution in reaction tower counter current contacting, the tail gas air inducing power traction of generation is reacted
Entering absorb the bottom of the tower, milk of lime is sprayed from absorption tower top down and tail gas counter current contacting, and the sour gas in tail gas is absorbed,
Tail gas is discharged at the top of absorption tower, milk of lime cyclic absorption heel row to neutralization chamber；
（2）The thick calcium nitrate liquid that reaction tower overflow goes out enters neutralization chamber, calcium nitrate liquid and lime after coarse filter filters
Clarified after breast reaction regulation PH into defecator；
（3）The calcium nitrate clear liquid that defecator top comes out enters calcium nitrate liquid bath, and the thickened drilling fluid of bottom, which is discharged into, to be washed in mud groove,
After filter press press filtration, filtrate is re-fed into calcium nitrate liquid bath by temporary tank, and the calcium nitrate liquid in calcium nitrate liquid bath passes through nitric acid
Calcium liquid pump is sent to rear workshop section；
（4）After filter residues of press filter pressure is full, stops into thickened drilling fluid, washing filter residue is carried out by technique hot condensed water, washed out
The muddy water of washing come enters temporary tank, stops washing after filter residue wash clean；Muddy water of washing in temporary tank is washed by temporary pump entrance
Muddy water groove, the muddy water of washing washed in muddy water groove respectively enter ashing melting machine ashing by washing muddy water pump or entered with acid tank and high concentration
Dust technology complex acid；Enter reaction tower bottom by sour pump with the acid prepared in acid tank with the lime stone in reaction tower neutralize instead
Should.
Further, complete the device of the above method, including be sequentially connected absorption tower, reaction tower, neutralization chamber, clarification
Groove, wash mud groove, filter press, temporary tank, wash muddy water groove, with acid tank, calcium nitrate liquid bath；Wherein absorption tower passes through absorption pump and neutralization
Groove connects, and is connected by blower fan with reaction tower, and be connected with liming still and ashing melting machine in turn；Reaction tower is connected by coarse filter
Neutralization chamber；Neutralization chamber connects defecator by neutralizing pump, and is connected with liming still and ashing melting machine in turn；Defecator also with nitric acid
Calcium liquid bath connects；Mud groove is washed to be connected with filter press by filter pressing pump；Temporary tank is connected and washes muddy water groove and nitre respectively by temporary pump
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.
Lime stone of the present invention is all recovered to suction with air-introduced machine with dust technology in the tail gas that reaction tower counter current contacting reflects
Tower is received, top is discharged after passing into absorption tower from bottom；Milk of lime circulation from liming still is got to absorption by absorption pump
Top of tower sprays downwards and tail gas counter current contacting, the sour gas in tail gas is absorbed, in absorption tower after milk of lime cyclic absorption
Drain into neutralization chamber, i.e., the tail gas that reaction tower comes out is not to be absorbed with water but sharp by blower fan after all recovery enters absorption tower
Carried out absorbing sour gas therein, good absorbing effect with milk of lime, exhaust emissions more cleans；The thick nitre that reaction tower overflow goes out
Sour calcium liquid enters neutralization chamber after coarse filter filters, and quick lime enters lime with washing the milk of lime that muddy water produces in ashing melting machine
Newborn groove, the milk of lime on the calcium nitrate liquid absorption tower in neutralization chamber and the milk of lime of liming still adjust PH to after qualified, enter
Defecator is clarified；The calcium nitrate clear liquid that defecator top comes out enters calcium nitrate liquid bath；The thickened drilling fluid row of defecator bottom
Enter to wash in mud groove, filter press is entered by filter pressing pump, the clear liquid being press-filtered out enters temporary tank and also enters calcium nitrate by temporary pump
Liquid bath, that is, the thick calcium nitrate liquid of muddiness for regulating PH are not all of producing calcium nitrate clear liquid using filter press press filtration, but advanced
Enter defecator and carry out clarification concentration, the clear liquid on top is calcium nitrate liquid finished product, filter press only press filtration defecator bottom it is dense
Thicker mud after contracting, the load that this technique alleviates filter press accelerate speed of filter pressing and have 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 filter residue, and the muddy water of washing being washed out enters temporary tank, stops washing, this hair after filter residue wash clean
It is bright to carry out washing filter residue first using process condensate water, ensure that filter residue totally discharges, not only reclaimed calcium nitrate liquid in filter residue but also
Reduce pollution of the filter residue to environment；Muddy water is washed by temporary pump into muddy water groove is washed in temporary tank, washes washing in muddy water groove
Muddy water respectively enters ashing melting machine ashing or into the dust technology complex acid with acid tank and high concentration by washing muddy water pump, improves nitric acid
The concentration of calcium liquid, it is fairly obvious that energy resource consumption reduction production cost effect is saved rear workshop section；Pass through with the acid prepared in acid tank
Sour pump enters reaction tower bottom and carries out neutralization reaction with the lime stone 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, reduce rear workshop section's energy
Consumption；
（3）PH is adjusted directly using quick lime and with milk of lime, reduces the consumption of quick lime；
（4）Thick calcium nitrate liquid after regulation PH is first clarified, and clarified solution, which does not have to press filtration, to be directly as calcium nitrate liquid
Workshop section uses afterwards, and thickened drilling fluid caused by clarification just uses filter press press filtration, mitigates the load of filter press significantly；
（5）Filter residue caused by filter press can washes clean, reduce disposal of pollutants, saved consumption of raw materials；
（6）Low concentration caused by washing filter residue washes muddy water comprehensive utilization, not directly enters in calcium nitrate liquid, after reducing
The energy resource consumption of workshop section.
This invention removes reacted tail gas tobacco problem, reduces disposal of pollutants, consumption of raw materials amount is low, and energy consumption is low.
Brief 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,
In 8- acid pump, 9- neutralization chambers, 10- and pump, 11- defecators, 12- wash mud groove, 13- filter pressing pumps, 14- filter presses, 15- temporary tanks,
16- keeps in pump, 17- washes muddy water groove, 18- washes muddy water pump, 19- is with acid tank, 20- calcium nitrate liquid bath, 21- calcium nitrate liquid pump, 22-ization
Grey machine.
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 be sequentially connected absorption tower 2, reaction tower 5, neutralization chamber 9,
Defecator 11, wash mud groove 12, filter press 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 by blower fan 3 with reaction tower 5, 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 neutralizing 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 filter press 14；Temporary tank 15 is connected and washes muddy water groove 17 and calcium nitrate liquid respectively by temporary pump 16
Groove 20；Wash muddy water groove 17 and match somebody with somebody acid tank 19 and ashing melting machine 22 by washing muddy water pump 18 and connecting respectively；Calcium nitrate liquid bath 20 is connected with nitre
Sour calcium liquid pump 21.
Operationally, step is said apparatus：
（1）Lime stone is sent into the top of reaction tower 5 by elevator 4, dust technology is sent into the bottom of reaction tower 5, lime stone
The bottom of absorption tower 2 is introduced with air-introduced machine 3 in reaction tower counter current contacting, the tail gas for reacting generation with dust technology, the overflow of reaction tower 5 goes out
Thick calcium nitrate liquid by coarse filter 6 filtering after enter neutralization chamber 9；
（2）Milk of lime is sprayed from the top down of absorption tower 2 and tail gas counter current contacting, and the sour gas in tail gas is absorbed,
Tail gas is discharged at the top of absorption tower, and neutralization chamber 9 is drained into by absorption pump 1 after milk of lime cyclic absorption；
（3）Calcium nitrate liquid and milk of lime reaction regulation PH, clear into defecator progress by neutralizing pump in neutralization chamber 9
Clearly, the calcium nitrate clear liquid that top comes out enters calcium nitrate liquid bath 20, and the thickened drilling fluid of bottom, which is discharged into, to be washed in mud groove 12, through filter press 14
After press filtration, 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 is sent to rear workshop section；
（4）After the filter residue of filter press 14 pressure is full, stops into thickened drilling fluid, washing filter residue is carried out by technique hot condensed water, wash
Muddy water of washing out enters temporary tank 15, stops washing after filter residue wash clean, and the muddy water of washing in temporary tank 15 passes through temporary pump
16 into muddy water groove 17 is washed, and the muddy water of washing washed in muddy water groove 17 respectively enters the ashing of ashing melting machine 22 or entrance by washing muddy water pump 18
Dust technology complex acid with acid tank 19 Yu high concentration, the bottom of reaction tower 5 and reaction are entered by sour pump 8 with the acid prepared in acid tank 19
Lime stone in tower 5 carries out neutralization reaction.
Claims (3)
- A kind of 1. method for producing calcium nitrate liquid, it is characterised in that step is：（1）Lime stone and high concentration salpeter solution are introduced into suction in reaction tower counter current contacting, the tail gas for reacting generation with air-introduced machine Tower bottom is received, milk of lime absorbs the sour gas in tail gas, tail gas from absorption tower top down spray and tail gas counter current contacting Discharged at the top of from absorption tower, milk of lime cyclic absorption heel row to neutralization chamber；（2）The thick calcium nitrate liquid that reaction tower overflow goes out enters neutralization chamber after coarse filter filters, and calcium nitrate liquid and milk of lime are anti- Clarified after pH should be adjusted into defecator；（3）The calcium nitrate clear liquid that defecator top comes out enters calcium nitrate liquid bath, and the thickened drilling fluid of bottom, which is discharged into, to be washed in mud groove, through pressure After filter press filtration, 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, stops into thickened drilling fluid, washing filter residue is carried out by technique hot condensed water, is washed out Wash muddy water and enter temporary tank, stop washing after filter 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 enter the dilute nitre of ashing melting machine ashing or entrance with acid tank and 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 carries out neutralization reaction with the lime stone in reaction tower.
- 2. complete claim 1 methods described device, it is characterised in that including be sequentially connected absorption tower, reaction tower, neutralization Groove, defecator, wash mud groove, filter press, temporary tank, wash muddy water groove, with acid tank, calcium nitrate liquid bath；Wherein absorption tower passes through absorption Pump is connected with neutralization chamber, is connected by blower fan with reaction tower, and be connected with liming still and ashing melting machine in turn；Reaction tower passes through thick Filter connects neutralization chamber；Neutralization chamber connects defecator by neutralizing pump, and is connected with liming still and ashing melting machine in turn；Defecator Also it is connected with calcium nitrate liquid bath；Mud groove is washed to be connected with filter press by filter pressing pump；Temporary tank is connected and washes mud respectively by temporary pump 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.
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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 |
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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 |
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| CN106629805B true CN106629805B (en) | 2017-11-21 |
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