CN103908797B - The feed system of crystallizer and feed process - Google Patents
The feed system of crystallizer and feed process Download PDFInfo
- Publication number
- CN103908797B CN103908797B CN201410143016.8A CN201410143016A CN103908797B CN 103908797 B CN103908797 B CN 103908797B CN 201410143016 A CN201410143016 A CN 201410143016A CN 103908797 B CN103908797 B CN 103908797B
- Authority
- CN
- China
- Prior art keywords
- mother liquor
- storage tank
- feed
- charging aperture
- crystallizer
- Prior art date
Links
- 238000000034 methods Methods 0.000 title claims abstract description 34
- 238000003860 storage Methods 0.000 claims abstract description 101
- 239000010413 mother solutions Substances 0.000 claims abstract description 69
- 238000004064 recycling Methods 0.000 claims abstract description 69
- 238000002425 crystallisation Methods 0.000 claims abstract description 48
- 238000007599 discharging Methods 0.000 claims abstract description 48
- BFNBIHQBYMNNAN-UHFFFAOYSA-N Ammonium sulfate Chemical compound 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N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 19
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 19
- 239000007788 liquids Substances 0.000 claims description 12
- 230000001702 transmitter Effects 0.000 claims description 11
- 238000007667 floating Methods 0.000 claims description 6
- 238000004062 sedimentation Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 2
- 239000011901 water Substances 0.000 description 7
- 241001081830 Degeneriaceae Species 0.000 description 5
- 238000005554 pickling Methods 0.000 description 4
- 230000000903 blocking Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000000243 solutions Substances 0.000 description 3
- 239000002253 acids Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000007789 gases Substances 0.000 description 2
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- IYJYQHRNMMNLRH-UHFFFAOYSA-N Sodium aluminate Chemical compound 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[Na+].O=[Al-]=O IYJYQHRNMMNLRH-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound 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OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000003750 conditioning Effects 0.000 description 1
- 238000005516 engineering processes Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 230000002269 spontaneous Effects 0.000 description 1
- 239000011977 sulfuric acid Substances 0.000 description 1
Abstract
Description
Technical field
The invention belongs to crystallizer apparatus field, specifically, the present invention relates to a kind of feed system of crystallizer and use this feed system for the method for crystallizer charging.
Background technology
The equipment that acid wash produces ammonium sulfate process comprises absorptive unit and crystallizer.Absorptive unit by sulfuric acid solution by the NH in coke-stove gas 3absorb to produce ammonium sulfate liquor, when the proportion of ammonium sulfate liquor reaches 1.240g/cm 3~ 1.243g/cm 3after, by pipeline by ammonium sulfate liquor from absorptive unit be delivered to DTB crystallizer control effectively ground evaporative crystallization.
Absorptive unit in the equipment of acid wash production ammonium sulfate process of the prior art is using pickling tower as main equipment.The NH in coke-stove gas is absorbed at pickling tower 3process in, the mist eliminator being positioned at pickling top of tower and the flowing full pipe being positioned at pickling tower upper-lower section may block.In this case, the demineralized water by 70 DEG C is needed not to be shorter than the cleaning of 0.5h with dredge blockage part to blocking portion.Demineralized water is carrying out the content that can increase water in ammonium sulfate liquor in cleaning process to blocking portion, the proportion of ammonium sulfate liquor is reduced, the follow-up quantity of steam entering crystallizer and carry out needed for evaporative crystallization increasing ammonium sulfate liquor, thus have impact on the stability of crystallizer operation.In addition, the proportion instability entering the ammonium sulfate liquor of crystallizer also can affect granularity and the quality of the ammonium sulfate product after ammonium sulfate liquor evaporative crystallization.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of feed system of crystallizer is provided and uses this feed system for the feed process of crystallizer charging.
According to an aspect of the present invention, provide a kind of feed system of crystallizer, described device comprises Recycling Mother Solution groove, mother liquor storage tank, crystallizer feed pump, crystallization tank supply pump and many pipelines, and wherein, Recycling Mother Solution groove comprises charging aperture and the discharging opening lower than charging aperture along short transverse; Mother liquor storage tank comprises charging aperture and the discharging opening lower than charging aperture along short transverse; The charging aperture of Recycling Mother Solution groove receives the mother liquor needing evaporative crystallization, the discharging opening of Recycling Mother Solution groove is connected by the first pipeline with the charging aperture of crystallization tank supply pump, the discharging opening of crystallization tank supply pump is connected by second pipe with the charging aperture of mother liquor storage tank, the discharging opening of mother liquor storage tank is connected by the 3rd pipeline with the charging aperture of crystallizer feed pump, and the discharging opening of crystallizer feed pump is connected by the 4th pipeline with the charging aperture of crystallizer.
According to feed system of the present invention, mother liquor storage tank can also comprise lower than charging aperture and higher than discharging opening overfall along short transverse, overfall can be connected by the 5th pipeline with the charging aperture of Recycling Mother Solution groove, and wherein, the charging aperture of Recycling Mother Solution groove can be set to three-port structure.
According to feed system of the present invention, control valve and flowmeter can be provided with on the 4th pipeline.
According to feed system of the present invention, floating ball lever meter can be provided with in mother liquor storage tank.
According to feed system of the present invention, pressure difference transmitter can be provided with in mother liquor storage tank.
According to a further aspect in the invention, provide a kind of feed process for crystallizer charging using above-mentioned feed system, described feed process comprises the following steps that order performs: the mother liquor of crystallization to be evaporated natural subsidence in the charging aperture inflow Recycling Mother Solution groove of Recycling Mother Solution groove and in Recycling Mother Solution groove is separated; Extracted the mother liquor of sedimentation Recycling Mother Solution groove by crystallization tank supply pump from the discharging opening of Recycling Mother Solution groove, and pump to mother liquor storage tank via the charging aperture of mother liquor storage tank by mother liquor, mother liquor again carries out sedimentation separation in mother liquor storage tank; Extract the mother liquor of sedimentation mother liquor storage tank by the discharging opening of crystallizer feed pump from mother liquor storage tank and the charging aperture of mother liquor via crystallizer is pumped in crystallizer.
According to feed process of the present invention, mother liquor can be ammonium sulfate liquor.
According to feed process of the present invention, can by being arranged on the flow of the control valve on the 4th pipeline and the mother liquor in flowmeter control the 4th pipeline.
According to feed process of the present invention, can by being arranged on the liquid level of the mother liquor in the floating ball lever meter monitoring mother liquor storage tank in mother liquor storage tank.
According to feed process of the present invention, can by being arranged on the liquid level pressure reduction in the pressure difference transmitter monitoring mother liquor storage tank in mother liquor storage tank, and the signal of liquid level pressure reduction in the mother liquor storage tank of the control valve be arranged on the 4th pipeline and pressure difference transmitter being monitored carries out interlocked control, with by the level stability of mother liquor storage tank in precalculated position.
According to the feed process that feed system and this feed system of use of crystallizer of the present invention are crystallizer charging, the stability needing the proportion of the ammonium sulfate liquor of evaporative crystallization being delivered to crystallizer can be significantly improved, reduce ammonium sulfate liquor follow-up and enter the quantity of steam that crystallizer carries out needed for evaporative crystallization, improve the stability of crystallizer operation and improve granularity and the quality of the ammonium sulfate product in crystallizer after evaporative crystallization.
Accompanying drawing explanation
The following description of the exemplary embodiment of carrying out in conjunction with the drawings, these and/or other aspect of the present invention and advantage will become clear and be easier to understand, wherein:
Fig. 1 shows the structural representation of the feed system of the crystallizer according to exemplary embodiment of the present invention.
Description of reference numerals:
1 Recycling Mother Solution groove
The charging aperture of 11 Recycling Mother Solution grooves
The discharging opening of 12 Recycling Mother Solution grooves
2 mother liquor storage tanks
The charging aperture of 21 mother liquor storage tanks
The discharging opening of 22 mother liquor storage tanks
The overfall of 23 mother liquor storage tanks
3 crystallizers
The charging aperture of 31 crystallizers
4 crystallization tank supply pumps
5 crystallizer feed pumps
6 control valves
7 flowmeters
81 first pipelines
82 second pipes
83 the 3rd pipelines
84 the 4th pipelines
85 the 5th pipelines
Detailed description of the invention
Below with reference to accompanying drawings and describe the feed system of crystallizer of the present invention in detail in conjunction with exemplary embodiment and use this device for the feed process of crystallizer charging.
Shown in Fig. 1 is the structural representation of the feed system of crystallizer according to exemplary embodiment of the present invention.Describe the feed system of crystallizer of the present invention in detail below with reference to Fig. 1 and use this device for the feed process of crystallizer charging.
With reference to Fig. 1, comprise Recycling Mother Solution groove 1, mother liquor storage tank 2, crystallization tank supply pump 4, crystallizer feed pump 5 and many pipelines according to the feed system of the crystallizer of exemplary embodiment of the present invention.
Recycling Mother Solution groove 1 comprises charging aperture 11 and discharging opening 12 along short transverse, and charging aperture 11 is arranged at the top of Recycling Mother Solution groove 1, and discharging opening 12 is arranged at the bottom of Recycling Mother Solution groove 1.The mother liquor of evaporative crystallization is needed to flow into Recycling Mother Solution groove 1 by the charging aperture 11 of Recycling Mother Solution groove and in holding process in Recycling Mother Solution groove 1, natural subsidence is separated.In this case, the mother liquor that proportion is relatively high is deposited on the bottom of Recycling Mother Solution groove 1.Crystallization tank supply pump 4 is arranged at the side of Recycling Mother Solution groove 1, the charging aperture of crystallization tank supply pump 4 is connected with the discharging opening 12 of Recycling Mother Solution groove 1 by the first pipeline 81, and the discharging opening of crystallization tank supply pump 4 is connected with the charging aperture 21 of mother liquor storage tank 2 by second pipe 82.Under this connected mode, the mother liquor be deposited on bottom Recycling Mother Solution groove 1 is pumped to mother liquor storage tank 2 by the first pipeline 81 and second pipe 82 by crystallization tank supply pump 4, the proportion of the mother liquor be stored in bottom mother liquor storage tank 2 can be improved like this, reduce the quantity of steam of the mother liquid evaporation crystallization process in crystallizer 3 and improve the stability of crystallizer 3 operation.According to one exemplary embodiment of the present invention, the charging aperture 11 of Recycling Mother Solution groove 1 is arranged at the top of Recycling Mother Solution groove 1, the use volume of Recycling Mother Solution groove 1 can be increased like this, but the present invention is not limited to this, that is, the charging aperture 11 of Recycling Mother Solution groove 1 can be arranged at the position of the discharging opening 12 higher than Recycling Mother Solution groove 1 of arbitrary short transverse of Recycling Mother Solution groove 1.According to another exemplary embodiment of the present invention, the discharging opening of Recycling Mother Solution groove 1 is arranged at the bottom of Recycling Mother Solution groove 1, mother liquor relatively heavier for the proportion being deposited on the bottom of Recycling Mother Solution groove 1 can be pumped to mother liquor storage tank 2 like this, to improve the proportion of mother liquor bottom mother liquor storage tank 2, but the present invention is not limited to this, that is, the discharging opening 12 of Recycling Mother Solution groove 1 can be arranged at the position of the charging aperture 11 lower than Recycling Mother Solution groove 1 of arbitrary short transverse of Recycling Mother Solution groove 1.
Mother liquor storage tank 2 comprises charging aperture 21 and discharging opening 22 along short transverse, and charging aperture 21 is positioned at the top of mother liquor storage tank 1, and is connected by second pipe 82 with crystallization tank supply pump 4, and discharging opening 22 is positioned at the bottom of mother liquor storage tank 2.By crystallization tank supply pump 4 to pump in mother liquor to mother liquor storage tank 2 holding process in mother liquor storage tank 2 naturally all with and natural subsidence be separated, in this case, the mother liquor that proportion is relatively high can be deposited on the bottom of mother liquor accumulator tank 2.Crystallizer feed pump 5 is arranged at the side of mother liquor storage tank 2, and the charging aperture of crystallizer feed pump 5 is connected with the discharging opening 22 of mother liquor storage tank 2 by the 3rd pipeline 83, and the discharging opening of crystallizer feed pump 5 is connected with the charging aperture 31 of crystallizer 3 by the 4th pipeline 84.Under this connected mode, the mother liquor be deposited on bottom mother liquor storage tank 2 is pumped in crystallizer 3 by the 3rd pipeline 83 and the 4th pipeline 84 by crystallizer feed pump 5, the proportion pumped to the mother liquor in crystallizer 2 can be improved like this, the quantity of steam that the evaporation and crystal process of the mother liquor in crystallizer 2 is needed reduces, thus improves the stability of crystallizer 2 operation.In addition, pump, to the mother liquor in crystallizer 3, there is the uniformity that metastable proportion can also improve the granularity of the crystal that mother liquor is separated out in evaporation and crystal process, improve the quality of crystalline product.According to one exemplary embodiment of the present invention, the charging aperture 21 being arranged at the top of mother liquor storage tank 2 can increase the use volume of mother liquor storage tank 2, to improve the mother liquid disposal amount of mother liquor storage tank 2, but the present invention is not limited to this, that is, the charging aperture 21 of mother liquor storage tank 2 can be arranged at the position of the discharging opening 21 higher than mother liquor storage tank 2 of arbitrary short transverse of mother liquor storage tank 2.
According to exemplary embodiment of the present invention, preferably, the discharging opening of Recycling Mother Solution groove 1 can be connected to the charging aperture 21 of mother liquor storage tank 2 with more than one crystallization tank supply pump 4 by pipeline, the discharging opening 22 of mother liquor storage tank 2 can be connected to the charging aperture 31 of crystallizer 3 with more than one crystallizer feed pump 5 by pipeline, can overhaul device when crystallization tank supply pump 4 and/or crystallizer feed pump 5 break down and/or blocking occurs connecting pipe and not affect carrying out smoothly of production like this.According to one exemplary embodiment of the present invention, the discharging opening with the Recycling Mother Solution groove 1 of three-port structure can be connected to the charging aperture of two crystallization tank supply pumps 4 by two pipelines, and is connected with the charging aperture 21 with three-port structure of mother liquor storage tank 2 by the discharging opening of crystallization tank supply pump 4 by two pipelines; The discharging opening 22 with the mother liquor storage tank 2 of three-port structure can be connected to the charging aperture of two crystallizer feed pumps 5 by two pipelines, and is connected by the charging aperture of the discharging opening of crystallizer feed pump 5 with the crystallizer 3 with three-port structure by two pipelines.But the present invention is not limited to this, that is, Recycling Mother Solution groove 1, mother liquor storage tank 2 or crystallizer 3 can arrange more than one charging aperture and/or discharging opening.
According to exemplary embodiment of the present invention, between the charging aperture 21 of the short transverse of mother liquor storage tank 2 and discharging opening 22, overfall 23 can be set, and the charging aperture 11 of Recycling Mother Solution groove 1 can be connected to by the 5th pipeline 85, the level stability of mother liquor storage tank 2 and the water balance of whole system can be controlled like this.Under these circumstances, the charging aperture 11 of Recycling Mother Solution groove 1 can arrange three-port structure, needs the mother liquor of evaporative crystallization and the overflow of mother liquor storage tank 2 so that receive simultaneously.But the present invention is not limited to this, that is, Recycling Mother Solution groove 1 can arrange two charging apertures 11 to receive the overflow for the mother liquor and mother liquor storage tank 2 needing evaporative crystallization respectively.
According to exemplary embodiment of the present invention, temperature in Recycling Mother Solution groove 1 can control at 45 DEG C ~ 55 DEG C, the temperature of mother liquor storage tank 2 can control at 40 DEG C ~ 50 DEG C, can avoid the generation of the phenomenon of the mother liquor generation spontaneous nucleation in the too low Recycling Mother Solution groove 1 that causes of temperature and mother liquor storage tank 2 like this.
According to exemplary embodiment of the present invention, preferably, floating ball lever meter can be provided with in mother liquor storage tank 2, can the mother liquor in mother liquor storage tank 2 be monitored in real time like this, with the water balance of the level stability and whole system that control mother liquor storage tank 2.
According to exemplary embodiment of the present invention, preferably, pressure difference transmitter can be provided with in mother liquor storage tank 2, can monitor in real time the liquid level pressure reduction of mother liquor storage tank 2 like this.
According to exemplary embodiment of the present invention, preferably, control valve 6 and flowmeter 7 can be provided with on the 4th pipeline 84, in order to monitor and to regulate the flow of the mother liquor in the 4th pipeline 84.
According to one exemplary embodiment of the present invention, preferably, pressure difference transmitter can be set in mother liquor storage tank 2, control valve 6 and flowmeter 7 are set simultaneously on the 4th pipeline 84, and the pilot signal of the conditioning signal of the signal of pressure difference transmitter, control valve 6 and flowmeter 7 is introduced DCS system, the automatic adjustment of the flow of mother liquor and the liquid level of mother liquor storage tank 2 in the 4th pipeline 84 is then realized by control valve 6.
According to exemplary embodiment of the present invention, according to the disposal ability of crystallizer 3, the feed system of the crystallizer 3 of more than one DTB crystallization processes of the present invention can be set, to improve the treating capacity of crystallizer 3, that also can avoid breaking down that the process influence that carries out overhauling produces due to arbitrary feed system carrying out simultaneously smoothly.
According to exemplary embodiment of the present invention, more than one Recycling Mother Solution groove 1 and more than one mother liquor storage tank 2 can be set between the first pipeline 81 and the 4th pipeline 84, and can be interconnected in the mode of connecting with crystallization tank supply pump 4 by other pipeline, can extend like this mother liquor at Recycling Mother Solution groove 1 and/or mother liquor the natural subsidence disengaging time in mother liquor storage tank 2, improve the stability being delivered to the proportion of the mother liquor of crystallizer 3, improve the uniformity of the granularity of the stability of crystallizer 3 operation and the crystal of precipitation further.
Below, with reference to the accompanying drawings and describe in conjunction with exemplary embodiment of the present invention the feed process that uses said apparatus to be crystallizer charging in detail.
First, make to need the mother liquor of crystallizer 3 evaporative crystallization to flow in Recycling Mother Solution groove 1 from the charging aperture 11 of Recycling Mother Solution groove 1, now, the mother liquor in Recycling Mother Solution groove 1 can produce the phenomenon of AUTOMATIC ZONING due to difference of specific gravity.
Secondly, extract mother liquor by crystallization tank supply pump 4 and the first pipeline 81 from the discharging opening 12 be positioned at bottom Recycling Mother Solution groove 1, and by second pipe 82, mother liquor is delivered to mother liquor storage tank 2.Now, the mother liquor be delivered in mother liquor storage tank 2 is the lower floor's mother liquor in Recycling Mother Solution groove 1, and in mother liquor storage tank 2, again can produce layering according to the difference of proportion.
Finally, mother liquor is extracted from the discharging opening 22 be positioned at bottom mother liquor storage tank 2 by crystallizer feed pump 5 and the 3rd pipeline 83, and by the 4th pipeline 84 mother liquor is delivered in crystallizer 3 and carries out evaporative crystallization, now, the mother liquor be delivered in crystallizer 3 is the lower floor's mother liquor in mother liquor storage tank 2.
According to exemplary embodiment of the present invention, when mother liquor in mother liquor storage tank 2 is higher than overfall 23, by the 5th pipeline 85, the overflow portion in mother liquor storage tank 2 can be delivered to Recycling Mother Solution groove 1, so that control the level stability of mother liquor storage tank 2 and the water balance of whole system.
According to exemplary embodiment of the present invention, mother liquor can be ammonium sulfate liquor, but the present invention is not limited to this, and that is, mother liquor can such as, for needing other solution of evaporative crystallization process, sodium aluminate solution.
According to exemplary embodiment of the present invention, can monitor by the control valve 6 of setting on the 4th pipeline 84 and flowmeter 7 and regulate the flow of the mother liquor in the 4th pipeline 84.
According to exemplary embodiment of the present invention, the mother liquor in mother liquor storage tank 2 can be monitored in real time, with the water balance of the level stability and whole system that control mother liquor storage tank 2 by the floating ball lever meter arranged in mother liquor storage tank 2.
According to exemplary embodiment of the present invention, pressure difference transmitter can be provided with in mother liquor storage tank 2, can monitor in real time the liquid level pressure reduction of mother liquor storage tank 2 like this, and the liquid level signal that the control valve 6 on the 4th pipeline 84 and pressure difference transmitter are monitored can be carried out interlocked control, with by the level stability of mother liquor storage tank 2 in precalculated position.
According to the feed system of crystallizer of the present invention and use this device for the feed process of crystallizer charging, repeatedly layered shaping can be carried out by needing the mother liquor of evaporative crystallization by simple equipment operating, to ensure that the mother liquor being delivered to crystallizer has higher proportion and the stability of proportion, the follow-up quantity of steam entering crystallizer and carry out needed for evaporative crystallization reducing mother liquor, improves the stability of crystallizer operation and improves granularity and the quality of the ammonium sulfate product in crystallizer after evaporative crystallization.
Although describe the present invention with reference to specific embodiments and the drawings, will be appreciated that and the invention is not restricted to above embodiment.
Claims (10)
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| CN203529949U (en) * | 2013-10-22 | 2014-04-09 | 武汉科技大学 | Device for dilution crystallization of coked rough ammonium sulfate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008007154B4 (en) * | 2008-02-01 | 2014-03-20 | Gea Messo Gmbh | Process for the preparation of a coarse ammonium sulfate product by crystallization |
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| JPH03205314A (en) * | 1989-12-29 | 1991-09-06 | Nkk Corp | Method for controlling grain diameter of ammonium sulfate |
| CN1255457A (en) * | 1998-11-30 | 2000-06-07 | 上海梅山(集团)有限公司 | Process for purifying and reclaiming regenerated acid in coking plant |
| CN1431923A (en) * | 2000-05-29 | 2003-07-23 | 巴斯福股份公司 | Device for producing crystals |
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