CN106861225A - The continuous evaporating crystallizer and vapo(u)rization system of a kind of lightweight solid - Google Patents

The continuous evaporating crystallizer and vapo(u)rization system of a kind of lightweight solid Download PDF

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Publication number
CN106861225A
CN106861225A CN201710116274.0A CN201710116274A CN106861225A CN 106861225 A CN106861225 A CN 106861225A CN 201710116274 A CN201710116274 A CN 201710116274A CN 106861225 A CN106861225 A CN 106861225A
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China
Prior art keywords
cylinder
tank body
continuous evaporating
evaporating crystallizer
flare
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CN201710116274.0A
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CN106861225B (en
Inventor
阎建民
肖文德
罗漫
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D9/00Crystallisation
    • B01D9/0018Evaporation of components of the mixture to be separated
    • B01D9/0031Evaporation of components of the mixture to be separated by heating

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The present invention relates to the continuous evaporating crystallizer and vapo(u)rization system of a kind of lightweight solid, continuous evaporating crystallizer of the invention includes tank body, charging aperture, venthole, liquid outlet and magma extraction pipe, described charging aperture is arranged on the middle part of tank body, described venthole is arranged on the upper end of tank body, described liquid outlet is arranged on the lower end of tank body, middle part is provided with flare in described tank body, described flare big opening is down, small opening up, one end that described magma extraction pipe is located in tank body is connected with the small opening of flare.Compared with prior art, the continuous evaporating crystallizer that the present invention is provided produces magma from superjacent, and continuous evaporating crystallizer of the invention is applied to serialization stabilization industrial evaporation crystallization of the calcium propionate isodensity less than the lightweight solid of liquid.The continuous evaporating crystallizer that the present invention is provided is able to ensure that solution heating is separated with two processes of moisture evaporation in locus.

Description

The continuous evaporating crystallizer and vapo(u)rization system of a kind of lightweight solid
Technical field
It is continuous less than the lightweight solid of liquid more particularly, to a kind of density the present invention relates to a kind of evaporated crystallization device Crystallizing evaporator and vapo(u)rization system.
Background technology
Crystallization process is an important operation unit in chemical process, is an important ring for completing chemical products production Section, also applies quite varied in other industrial departments.The density of solid product is typically larger than solution density, therefore industry at present Upper general continuous crystallisation device such as Oslo crystallizers, DTB crystallizers are all to produce magma from the bottom of crystallisation vessel, then are passed through Filter and/or drying process obtain solid product (Ye Tielin,《Chemical crystallization Principle of Process and application》, Chemical Industry Press, 2006)。
Calcium propionate is a kind of important food additives, in the food industry using quite extensive.Propionic acid and calcium carbonate or Calcium hydroxide mutually carries out reaction and can obtain the aqueous solution of calcium propionate in water, because the density of calcium propionate is less than solution density, because This, typically takes the partition heating process of interval to evaporate most of moisture after reaction production calcium propionate and obtains concentrating magma (US P4700000,1987;The Guangdong such as Jia Zhenyu chemical industry the 2nd phase page 93 in 1999), it is impossible to realize large-scale continuous stabilization Production.Propionic acid calcium solution is passed through falling film evaporation device concentration (packaging with mechanical 3rd phase page 97 in 2015) by Chen Guangyu etc. can be with The serialization of implementation process, but solution heating with moisture evaporation simultaneously carry out, will cause solid calcium propionate on heating surface largely Deposition.
The content of the invention
The purpose of the present invention is exactly to provide a kind of company of lightweight solid for the defect for overcoming above-mentioned prior art to exist Continuous crystallizing evaporator and vapo(u)rization system, the continuous evaporating crystallizer that the present invention is provided produce magma from superjacent, of the invention Continuous evaporating crystallizer is applied to serialization stabilization industrial evaporation crystallization of the calcium propionate isodensity less than the lightweight solid of liquid.This The continuous evaporating crystallizer for providing is provided and is able to ensure that solution heating is separated with two processes of moisture evaporation in locus.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of continuous evaporating crystallizer of lightweight solid, including tank body, the charging aperture being arranged on tank body, venthole, go out Liquid mouthful, magma extraction pipe, and the demister in tank body is arranged on, described charging aperture is arranged on the middle part of tank body, and described goes out Steam ports is arranged on the upper end of tank body, and described liquid outlet is arranged on the lower end of tank body, and middle part is provided with loudspeaker in described tank body Shape enlarging, described flare big opening is down, small opening up, and described magma extraction pipe is located at the one end in tank body It is connected with the small opening of flare.Described flare space above is gas-liquid separation zone, and described is tubaeform Space below enlarging is liquid-solid separating region.
Described flare includes two parts connected up and down, and top is divided into the baffle plate of circular cone or polygonal pyramid shape, Bottom is divided into cylinder or multiaspect cylinder, and the baffle plate upper end of circular cone or polygonal pyramid shape is the vertex of a cone, and lower end is cone bottom, and the vertex of a cone is formed The small opening of flare, cylinder or multiaspect cylinder are connected on one with the cone back welding of circular cone or the baffle plate of polygonal pyramid shape, The lower ending opening of cylinder or multiaspect cylinder forms the big opening of flare.
Preferably, the cone-apex angle of the vertex of a cone that the baffle plate upper end of circular cone or polygonal pyramid shape is formed is 100-160 °.
Preferably, the height of cylinder or multiaspect cylinder is 200-1000mm..
Preferably, 3-15 times of a diameter of small opening diameter of the big opening of described flare, wherein tubaeform The small opening of enlarging is equal with the internal diameter of magma extraction pipe.
The position of described charging aperture is higher than cylinder or the upper end of multiaspect cylinder.
Described flare is fixed on tank interior by fixed thick stick.
Described tank body includes a cylinder and is connected to the end socket of cylinder upper and lower ends, and described venthole is opened in upper end On end socket, described liquid outlet is opened on the end socket of lower end, and described charging aperture is set along the side wall tangential direction of cylinder, described Demister be arranged on the top of cylinder or in the end socket of cylinder upper end.Preferably, described cylinder is cylindrical tube, cylinder The end socket at body two ends uses semielliptical shape structure or pyramidal structure.
Based on the vapo(u)rization system of continuous evaporating crystallizer of the present invention, including heater, continuous evaporating crystallizer, mistake Filter and blender, set feed conduit and heat exchange pipeline, the external recuperated cycle water of heat exchanger channels, mother tube in described heater The outlet in road is connected with the charging aperture of continuous evaporating crystallizer, and the entrance of filter is managed with the magma extraction of continuous evaporating crystallizer Connection, the mother liquor outlet of filter, the liquid outlet of continuous evaporating crystallizer are connected with blender, outlet and the heating of blender The entrance connection of feed conduit in device;
As common crystallizing evaporator, continuous evaporating crystallizer of the invention is used cooperatively with external heater, Solution after heated device heating enters continuous evaporating crystallizer from charging aperture, and part steam turns to steam and removes folder through demister Discharged from venthole after the mist of band, the circular passage of liquid and crystal between tank body and flare flows downward, residual The gas-liquid separation zone for staying bubble to rise and enter on flare;Liquid-solid separating region under flare, density Small solid is slow to float and enters magma extraction pipe through flare, so that in inflow filter in the form of magma, magma is passed through Filter filtering after, crystalline solids collect, magma filtering after mother liquor flow into blender, with the solution flowed out from liquid outlet and plus The raw material for entering mixes the entrance that Posterior circle enters feed conduit in heater in blender.
Compared with prior art, the continuous evaporating crystallizer that the present invention is provided produces magma from superjacent, of the invention Continuous evaporating crystallizer is applied to serialization stabilization industrial evaporation crystallization of the calcium propionate isodensity less than the lightweight solid of liquid.This The continuous evaporating crystallizer for providing is provided and is able to ensure that solution heating is separated with two processes of moisture evaporation in locus.Together When, structure type of the present invention is simple, produces trumpet flared structure, and it is small that magma flows up process Midst density along flare There is the concentration that inverse sedimentation is favorably improved magma in the solid particle of liquid.
Additionally, structure type of the present invention is not suitable for crystallizer in negative-pressure operation, due to extraction trumpet flared structure, in loudspeaker Further reduced to upper flowing pressure in shape enlarging, siphon extraction is difficult, mechanical pump extraction magma is then easy to cavitation.
Brief description of the drawings
Fig. 1 is continuous evaporating crystallizer structural representation of the invention;
Fig. 2 is the structural representation of the vapo(u)rization system based on continuous evaporating crystallizer of the present invention.
Label in figure, 1 charging aperture, 2 ventholes, 3 end sockets, 4 demisters, 5 cylinders, 6 fix thick stick, 7 flares, 8 crystalline substances Slurry extraction pipe, 9 liquid outlets, 11 heaters, 12 continuous evaporating crystallizers, 13 filters, 14 blenders.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
A kind of continuous evaporating crystallizer of lightweight solid, as shown in figure 1, including tank body, the charging aperture being arranged on tank body 1st, venthole 2, liquid outlet 9, magma extraction pipe 8, and the demister 4 in tank body is arranged on, charging aperture 1 is arranged in tank body Portion, venthole 2 is arranged on the upper end of tank body 1, and liquid outlet 9 is arranged on middle part in the lower end of tank body 1, tank body and is provided with tubaeform expansion Mouth 7, the big opening of flare 7 is down, small opening up, and magma extraction pipe 8 is located at one end and flare 7 in tank body Small opening be connected.The space above of flare 7 is gas-liquid separation zone, and the space below flare 7 is divided admittedly for liquid From area.
Wherein, tank body includes a cylinder 5 and is connected to the end socket 3 of the upper and lower ends of cylinder 5, and venthole 2 is opened in end seal On first 3, liquid outlet 9 is opened on lower end end socket 3, and charging aperture 1 is set along the side wall tangential direction of cylinder 5, and demister 4 is arranged on The top of cylinder 5 or in the end socket 3 of the upper end of cylinder 5.Cylinder 5 is cylindrical tube, and the end socket 3 at the two ends of cylinder 5 is ellipse using half Spherical structure or pyramidal structure.
Flare 7 includes two parts connected up and down, and top is divided into the baffle plate of circular cone or polygonal pyramid shape, lower part For cylinder or multiaspect cylinder, the baffle plate upper end of circular cone or polygonal pyramid shape is the vertex of a cone, and lower end is cone bottom, and the vertex of a cone forms tubaeform The small opening of enlarging 7, cylinder or multiaspect cylinder are connected on one, cylinder with the cone back welding of circular cone or the baffle plate of polygonal pyramid shape Or the lower ending opening of multiaspect cylinder forms the big opening of flare 7.What the baffle plate upper end of circular cone or polygonal pyramid shape was formed For 100-160 ° preferably, the height of cylinder or multiaspect cylinder is 200-1000mm to the cone-apex angle of the vertex of a cone.Flare 7 The small opening of 3-15 times of a diameter of small opening diameter of big opening, wherein flare 7 produces the internal diameter phase of pipe 8 with magma Deng.The position of charging aperture 1 is higher than cylinder or the upper end of multiaspect cylinder.Flare 7 passes through fixed thick stick 6 and is fixed in tank body Portion.
Based on the vapo(u)rization system of continuous evaporating crystallizer of the present invention, as shown in Fig. 2 H-IN and H-OUT represents heating in Fig. 2 The entrance of heat exchange pipeline and outlet in device 11, SOLID represent magma gained crystalline solids after the filtering of filter 13, and M represents brilliant Slurry is mother liquid obtained after being filtered through filter 13, and FEED represents the raw material for adding blender 14.The vapo(u)rization system include heater 11, Feed conduit and heat exchange pipeline are set in continuous evaporating crystallizer 12, filter 13 and blender 14, heater 11, outside heat exchanger channels Recuperated cycle water is connect, the outlet of feed conduit is connected with the charging aperture 1 of continuous evaporating crystallizer 12, the entrance of filter 13 and company The magma extraction pipe 8 of continuous crystallizing evaporator 12 is connected, the mother liquor outlet of filter 13, the liquid outlet 9 of continuous evaporating crystallizer 12 It is connected with blender 14, the outlet of blender 14 is connected with the entrance of feed conduit in heater 11.
As common crystallizing evaporator, continuous evaporating crystallizer of the invention is used cooperatively with external heater, Solution after heated device 11 is heated enters continuous evaporating crystallizer 12 from charging aperture 1, and part steam turns to steam through demister 4 Remove entrainment mist after discharged from venthole 2, the circular passage of liquid and crystal between cylinder 5 and flare 7 to Lower flowing, the gas-liquid separation zone that residual bubble rises and enters on flare 7;Liquid under flare 7 is consolidated Disengagement zone, the small solid of density slowly floats and enters magma through flare 7 and produces pipe 8, is flowed into the form of magma In filter 13, magma through filter 13 filter after, crystalline solids collect, magma filtering after mother liquor flow into blender 14, with from The solution of the outflow of liquid outlet 9 and the raw material that adds the mixing Posterior circle in the blender 14 enter into feed conduit in heater 11 Mouthful.
Using the crystallizing evaporator of the present embodiment, and the continuous of propionic acid calcium solution is carried out using the vapo(u)rization system shown in Fig. 2 Evaporative crystallization, processes 15 cubic metre of 20% propionic acid calcium solution of (mass fraction) per hour, and top operational pressure 1.0bar is (often Pressure), 3 meters of barrel diameter is high 8 meters, and top is hemispherical head, and bottom is the end socket of pyramidal structure, charging aperture, liquid outlet and goes out 0.4 meter of steam ports diameter, magma 0.3 meter of pipe diameter of extraction, diametrically 2.5 meters, loudspeaker outside the flare of magma extraction pipe connection 2.5 meters of lower cylinder diameter, 0.4 meter of the height of shape enlarging, top uses cone shape, 140 degree of cone-apex angle, charging aperture tying The centre position of brilliant device cylinder, charging aperture lower edge is higher by the cylinder of flare along 0.1 meter, going out outside magma extraction pipe Mouth position is remained basically stable with crystallizer cylinder lower edge, and extraction magma enters filter centrifugal.
The above-mentioned description to embodiment is to be understood that and use invention for ease of those skilled in the art. Person skilled in the art obviously can easily make various modifications to these embodiments, and described herein general Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to above-described embodiment, ability Field technique personnel announcement of the invention, does not depart from improvement that scope made and modification all should be of the invention Within protection domain.

Claims (9)

1. a kind of continuous evaporating crystallizer of lightweight solid, including tank body, charging aperture (1), the venthole being arranged on tank body (2), liquid outlet (9), magma extraction pipe (8), and it is arranged on the demister (4) in tank body, it is characterised in that described charging aperture (1) middle part of tank body is arranged on, described venthole (2) is arranged on the upper end of tank body (1), and described liquid outlet (9) is arranged on The lower end of tank body (1), middle part is provided with flare (7), described flare (7) big opening court in described tank body Under, small opening up, described magma extraction is managed the one end of (8) in tank body and is connected with the small opening of flare (7).
2. the continuous evaporating crystallizer of a kind of lightweight solid according to claim 1, it is characterised in that described is tubaeform Enlarging (7) includes two parts connected up and down, and top is divided into the baffle plate of circular cone or polygonal pyramid shape, and bottom is divided into cylinder or many The baffle plate upper end of face cylinder, circular cone or polygonal pyramid shape is the vertex of a cone, and lower end is cone bottom, and the vertex of a cone forms the small of flare (7) Opening, cylinder or multiaspect cylinder are connected on one, cylinder or multiaspect cylinder with the cone back welding of circular cone or the baffle plate of polygonal pyramid shape The lower ending opening of body forms the big opening of flare (7).
3. the continuous evaporating crystallizer of a kind of lightweight solid according to claim 2, it is characterised in that circular cone or polygonal pyramid The cone-apex angle of the vertex of a cone that the baffle plate upper end of shape is formed is 100-160 °.
4. the continuous evaporating crystallizer of a kind of lightweight solid according to claim 2, it is characterised in that cylinder or multiaspect The height of cylinder is 200-1000mm.
5. the continuous evaporating crystallizer of a kind of lightweight solid according to claim 2, it is characterised in that described is tubaeform 3-15 times of a diameter of small opening diameter of the big opening of enlarging (7).
6. a kind of continuous evaporating crystallizer of lightweight solid according to claim 2, it is characterised in that described charging aperture (1) position is higher than cylinder or the upper end of multiaspect cylinder.
7. the continuous evaporating crystallizer of a kind of lightweight solid according to claim 2, it is characterised in that described is tubaeform Enlarging (7) is fixed on tank interior by fixed thick stick (6).
8. a kind of continuous evaporating crystallizer of lightweight solid according to claim 1, it is characterised in that described tank body bag Include a cylinder (5) and be connected to the end socket (3) of cylinder (5) upper and lower ends, described venthole (2) is opened in upper end end socket (3) On, described liquid outlet (9) is opened on lower end end socket (3), described charging aperture (1) along cylinder (5) side wall tangential direction Set, described demister (4) is arranged on the top of cylinder (5) or in the end socket (3) of cylinder (5) upper end.
9. a kind of vapo(u)rization system of the continuous evaporating crystallizer based on described in claim 1, it is characterised in that including heater (11) set in, continuous evaporating crystallizer (12), filter (13) and blender (14), described heater (11) feed conduit with Heat exchange pipeline, the external recuperated cycle water of heat exchanger channels, the outlet of feed conduit and the charging aperture (1) of continuous evaporating crystallizer (12) Connection, the entrance of filter (13) is connected with magma extraction pipe (8) of continuous evaporating crystallizer (12), the mother liquor of filter (13) Outlet, the liquid outlet (9) of continuous evaporating crystallizer (12) are connected with blender (14), the outlet of blender (14) and heater (11) the entrance connection of interior feed conduit;
Solution after heated device (11) heating enters continuous evaporating crystallizer (12) from charging aperture (1), and part steam turns to steaming Vapour is discharged after the mist of demister (4) removing entrainment from venthole (2), and liquid and crystal are along tank body and flare (7) Between circular passage flow downward, the residual bubble gas-liquid separation zone that rises and enter on flare (7);In loudspeaker Liquid-solid separating region under shape enlarging (7), the small solid of density slowly floats and enters magma through flare (7) and produces pipe (8), in the form of magma in inflow filter (13), after magma is filtered through filter (13), crystalline solids are collected, magma filtering Mother liquor afterwards flows into blender (14), mixes in blender (14) with the solution flowed out from liquid outlet (9) and the raw material of addition Posterior circle enters the entrance of heater (11) interior feed conduit.
CN201710116274.0A 2017-03-01 2017-03-01 A kind of continuous evaporating crystallizer and vapo(u)rization system of lightweight solid Expired - Fee Related CN106861225B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107261544A (en) * 2017-08-10 2017-10-20 合肥宁垣工程技术有限责任公司 A kind of high-efficiency mould
CN107376401A (en) * 2017-08-31 2017-11-24 北京金隅琉水环保科技有限公司 A kind of lengthening formula crystallization cylinder and crystal system
CN107601747A (en) * 2017-11-07 2018-01-19 哈尔滨工程大学 A kind of crystallizing evaporator of oil removing containing salt oil-containing wastewater
CN110732155A (en) * 2019-11-14 2020-01-31 江苏润普食品科技股份有限公司 continuous evaporation crystallization process and device for calcium propionate with controllable particle size

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US6887452B1 (en) * 2000-10-31 2005-05-03 United States Filter Corporation System and method for precipitating salts
CN102284189A (en) * 2010-06-18 2011-12-21 大连化工研究设计院 Novel slurry circular-type crystallizer and application thereof
CN102294135A (en) * 2011-07-21 2011-12-28 无锡荣丰生物工程有限公司 Crystal-magma separator device
CN204543621U (en) * 2015-04-26 2015-08-12 宁波大学 A kind of safe evaporation crystallization equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6887452B1 (en) * 2000-10-31 2005-05-03 United States Filter Corporation System and method for precipitating salts
CN102284189A (en) * 2010-06-18 2011-12-21 大连化工研究设计院 Novel slurry circular-type crystallizer and application thereof
CN102294135A (en) * 2011-07-21 2011-12-28 无锡荣丰生物工程有限公司 Crystal-magma separator device
CN204543621U (en) * 2015-04-26 2015-08-12 宁波大学 A kind of safe evaporation crystallization equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107261544A (en) * 2017-08-10 2017-10-20 合肥宁垣工程技术有限责任公司 A kind of high-efficiency mould
CN107376401A (en) * 2017-08-31 2017-11-24 北京金隅琉水环保科技有限公司 A kind of lengthening formula crystallization cylinder and crystal system
CN107601747A (en) * 2017-11-07 2018-01-19 哈尔滨工程大学 A kind of crystallizing evaporator of oil removing containing salt oil-containing wastewater
CN107601747B (en) * 2017-11-07 2019-12-06 青岛哈工资源环境技术有限公司 oil-removing evaporative crystallizer for salt-containing oily wastewater
CN110732155A (en) * 2019-11-14 2020-01-31 江苏润普食品科技股份有限公司 continuous evaporation crystallization process and device for calcium propionate with controllable particle size
CN110732155B (en) * 2019-11-14 2022-03-29 江苏润普食品科技股份有限公司 Particle size controllable calcium propionate continuous evaporation crystallization process and device

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