CN105833555A - Plate heat exchanger concentration system and concentration process thereof - Google Patents

Plate heat exchanger concentration system and concentration process thereof Download PDF

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Publication number
CN105833555A
CN105833555A CN201610305824.9A CN201610305824A CN105833555A CN 105833555 A CN105833555 A CN 105833555A CN 201610305824 A CN201610305824 A CN 201610305824A CN 105833555 A CN105833555 A CN 105833555A
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CN
China
Prior art keywords
heat exchanger
steam
plate type
forced circulation
separator
Prior art date
Application number
CN201610305824.9A
Other languages
Chinese (zh)
Inventor
郭亮
周齐
张小江
鲍燕娟
牛柯
Original Assignee
深圳市瑞升华科技股份有限公司
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Application filed by 深圳市瑞升华科技股份有限公司 filed Critical 深圳市瑞升华科技股份有限公司
Priority to CN201610305824.9A priority Critical patent/CN105833555A/en
Publication of CN105833555A publication Critical patent/CN105833555A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/26Multiple-effect evaporating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/30Accessories for evaporators ; Constructional details thereof

Abstract

The invention provides a plate heat exchanger concentration system. The plate heat exchanger concentration system is characterized by comprising a stock tank, a distilled water plate heat exchanger, a steam plate heat exchanger, a plate type forced circulation heat exchanger, a separator, an MVR compressor system, a distilled water tank and a control system. The distilled water plate heat exchanger is provided with a first feed port, a first discharge port, a water inlet and a first water outlet. The steam plate heat exchanger is provided with a second feed port, a second discharge port, a steam inlet and a second water outlet. The plate type forced circulation heat exchanger comprises a forced circulation pump, a third feed port, a third discharge port, a circulation steam inlet and a third water outlet. A circulation steam outlet and a discharge port are formed in the upper end and the lower end of the separator respectively, and a fourth feed port is formed in one side of the separator. The plate heat exchanger concentration system is simple in structure, small in occupied area, flexible in operation, low in energy consumption, high in heat transfer efficiency, low in operating cost and environmentally friendly, heat energy can be used at multiple stages, and energy is saved.

Description

Plate type heat exchanger concentration systems and concentration technology thereof

Technical field

The present invention relates to concentration technology apparatus field, espespecially a kind of plate type heat exchanger concentration systems and concentration technology thereof.

Background technology

At existing evaporative crystallization, evaporation concentration device, three kinds of main technology are had to realize at present.

1. effect technique more than (MEE): in multi-effect evaporating device, initial steam heating the first effect the steam produced does not enters cold Condenser, but as second effect add thermal medium be able to again with.So initial steam can be consumed and effectively reduce about 50%. Reuse this principle, initial steam consumption can be reduced further.The maximum heating temperature of the first effect and the minimum boiling of last effect Point temperature defines total temperature difference, is distributed in each effect.As a result, often the effect temperature difference increases with effect number and reduces.So for reaching to specify Evaporation rate must increase heating surface (area) (HS.Preresearch estimates shows, for the effective heating surface (area) (HS of institute with the effect proportional increase of number, So, while steam saving gradually decreases, investment cost dramatically increases.

2. during the recompression of thermodynamic steam recompression (TVR): thermodynamic steam, according to heat pump principle, from boiling-house Steam is compressed to the elevated pressures of heating chamber;I.e. energy is added on steam.Due to corresponding with heating chamber pressure saturated Vapor (steam) temperature is higher so that steam can be used further to heating.Steam jet ejector is used for this.They are former according to ejector pump Reason operates, and does not has movable part, designs simple and effective, and can ensure that the highest functional reliability.Use a thermodynamic steam Compressor has identical saving steam/energy-saving effect with increasing 1st effective evaporator.The operation of thermodynamic steam compressor needs one The initial steam of determined number, the most so-called power steam.These power steams must be communicated to next effect, or is sent to condensation Device is as residue vapor.The energy equivalence that the dump energy being included in residue vapor is about provided with power steam.

3. mechanical vapor recompression technology (MVR): during function of mechanical steam recompression, will evaporation by mechanically operated compressor The both vapor compression that device steams is to elevated pressures.Therefore the machine that recompresses also serves as heat pump and carrys out work, increases energy to steam.With with following The compressing hot pump of ring process fluid (i.e. closed system, kind of refrigeration cycle) is contrary, because vapor recompression machine is as open systems Carry out work, therefore special compressing hot pump can be regarded as.Both vapor compression and subsequently add vapours condensation after, condensed fluid from Open cycle.Add vapours (side of heat) to be separated by the heat exchange surface of vaporizer with indirect steam (cold side).Open Formula compressing hot pump shows with the contrast of closed compressing hot pump: the evaporator surface in open systems substantially instead of closing The function of process fluid expansion valve in system.By using relatively little of energy, i.e. compressor leaf in the case of compressing hot pump The mechanical energy of wheel, energy is added into technique and adds in thermal medium and enter circulation continuously.In the case, it is not necessary to primary steam is made For adding thermal medium.

Three of the above evaporating and concentrating process is respectively arranged with advantage, but there is also deficiency: all use shell-and-tube heat exchanger (to include fall Film evaporator, climbing film evaporator, vertical array tubular forced heat-exchanging device, horizontal tubulation forced heat-exchanging device etc.) carry out heat exchange evaporation, take Area is big, uses the limitation of Existential Space, is not easy to maintenance;Shell-and-tube heat exchanger heat conductive efficiency is low so that cold and hot thing Heat transfer temperature difference between material is relatively big, reduces the concentration quality of finished product;Need to use substantial amounts of steam to carry out heat exchange, add fortune Row cost.

Summary of the invention

For solving the problems referred to above, the present invention provides a kind of simple in construction, and area occupied is few, flexible operation, and power consumption is few, heat transfer Efficiency is high, heat energy can be carried out Multi-class propagation, and operating cost is low, the plate type heat exchanger concentration systems of energy-conserving and environment-protective and concentration work thereof Skill.

For achieving the above object, the technical solution used in the present invention is:

A kind of plate type heat exchanger concentration systems, including: head tank;Distilled water plate type heat exchanger, is provided with the first charging aperture, first goes out Material mouth, water inlet, the first outlet;Steam-plate type heat exchanger, be provided with the second charging aperture, the second discharging opening, steam inlet, Two outlets;Board-like forced circulation heat exchanger, enters including forced circulation pump, the 3rd charging aperture, the 3rd discharging opening, cyclic steam Mouth, the 3rd outlet;Separator, separator top and bottom are respectively equipped with, cyclic steam exports, discharge gate, the one of separator Side is provided with the 4th charging aperture;MVR compressor assembly;Distillation water pot;Control system;Wherein said head tank is by feed pump and the One import connects, and described first discharging opening and the second charging aperture connect, and described second discharging opening and the 3rd charging aperture connect, described 3rd discharging opening and the 4th charging aperture connect, and distillation water pot is connected with water inlet by water pump, described second outlet, the 3rd go out The mouth of a river respectively with distillation water pot is connected, described cyclic steam outlet connect MVR compressor assembly and pass through MVR compressor assembly and Cyclic steam import connects, and described discharge gate connects forced circulation pump, and is connected by forced circulation pump and the 3rd charging aperture, institute State the external feeder of steam inlet, described control system respectively with feed pump, water pump, MVR compressor assembly, forced circulation Pump, feeder connect.

The concentration technology of a kind of plate type heat exchanger concentration systems, comprises the following steps:

Raw material preheating: by feed pump, material liquid being entered distilled water plate type heat exchanger, water pump will distill in distillation water pot simultaneously Water enters distilled water plate type heat exchanger and carries out heat exchange with raw material;Material liquid enters back into steam-plate type heat exchanger subsequently, supplies simultaneously Fresh steam is entered steam-plate type heat exchanger and carries out heat exchange with material liquid by device, subsequently enters board-like forced circulation heat exchanger;

Material liquid concentrates: the material liquid after heat exchange enters board-like forced circulation heat exchanger and carries out heat exchange concentration, subsequently enters separation Device, material liquid discharged by discharge gate in separator lower end, by forced circulation pump force to be again introduced into material liquid board-like by force Circulation heat exchanger processed carries out heat exchange concentration;

Gas-liquid separation: the raw material after heat exchange concentrates enters separator, the cyclic steam outlet from separator upper end of the steam of generation Entering MVR compressor assembly and carry out pressurization intensification, the indirect steam board-like forced circulation heat exchanger of entrance being warmed boosting is carried out Heat exchange, concentrated solution up to standard is discharged at the discharge gate of separator bottom;

Distilled water utilizes: the distilled water produced after steam-plate type heat exchanger and board-like forced circulation heat exchanger heat exchange enters distillation Water pot, as the heat transferring medium of distilled water plate type heat exchanger.

In the present invention, head tank is used for placing material liquid to be concentrated;Heat exchanger is used for material liquid pre-heating temperature elevation to reaching The temperature of evaporation;Forced heat-exchanging device is for carrying out forcing heat by the steam being warmed pressurization in the material liquid after preheating and separator Exchange concentrates;Separator is for carrying out concentrating and separating by the material liquid crossed through board-like forced circulation heat exchanger, and will not reach The steam produced to qualified material liquid and material liquid is back to board-like forced circulation heat exchanger heat exchange again;MVR compressor assembly For the gas on material liquid top in separator is carried out heat temperature raising;Distillation water pot is used for collecting plate type heat exchanger and board-like After forced circulation heat exchanger heat exchange produce water and by collect water be used as heat transferring medium;Control system be used for controlling material liquid with And the flow of heat transferring medium.

The beneficial effects of the present invention is:

1. present invention employs plate-type evaporator as forced heat-exchanging equipment, compare with traditional tubular evaparator, have following Feature (1) heat transfer efficiency is high, and K value is generally 3500-5800kW/(m2K), higher 2-4 times than shell-and-tube evaporator, thus on an equal basis Needed under the conditions of, heat-transfer area is little;(2) compact conformation, volume is little, overcomes the occasion of limited space;(3) light weight, heat transfer plate is thin, Consumption amount of metal is few, and every square metre of heating surface (area) (HS about consumes metal 10kg and is only the 1/3-1/4 of tube still heater;(4) heating The material time of staying in the heater is short, and inner dead space is few, and sanitary condition is good, it is adaptable to the heating of heat sensitive material;(5) operation Flexibly, equipment surplus is big, the quantity of plate can be increased or decreased as required to change its heating surface (area) (HS, or change work bar Part, specification of equipment amplitude is the biggest;(6) thermal source of lower temperature can be used, reclaim the heat in low-temperature heat source, between cold and hot material Heat transfer temperature difference may decrease to 4-5 DEG C.

2. present invention employs MVR(mechanical steam recompression) technology, use less fresh steam to heat, heat energy is entered Row Multi-class propagation, decreases the dependence to boiler plant, decreases pollutant, more energy-conserving and environment-protective.

3. present invention process flow process is simple, it is easy to accomplish, by PLC control system, material liquid flow, heat transferring medium are entered Row controls, and automaticity is high, and operating cost is low, meets sustainable development requirement, can be widely applied to actual industrial production mistake Cheng Zhong.

Accompanying drawing explanation

Fig. 1 is the system connection diagram of the present invention.

Drawing reference numeral illustrates: 1-head tank;11-feed pump;2-distilled water plate type heat exchanger;21-the first charging aperture;22- First discharging opening;23-water inlet;24-the first outlet;3-steam-plate type heat exchanger;31-the second charging aperture;32-the second discharging Mouthful;33-steam inlet;34-the second outlet;4-board-like forced circulation heat exchanger;41-forced circulation pump;42-the 3rd feeds Mouthful;43-the 3rd discharging opening;44-cyclic steam import;45-the 3rd outlet;5-separator;51-cyclic steam exports;52-arranges Material mouth;53-the 4th charging aperture;6-centrifugal compressor;7-distills water pot;71-water pump.

Detailed description of the invention

Referring to shown in Fig. 1, the present invention is about a kind of plate type heat exchanger concentration systems, including head tank 1;Distilled water plate Formula heat exchanger 2, is provided with first charging aperture the 21, first discharging opening 22, water inlet the 23, first outlet 24;Steam-plate type heat exchanger 3, it is provided with second charging aperture the 31, second discharging opening 32, steam inlet the 33, second outlet 34;Board-like forced circulation heat exchanger 4, Including forced circulation pump the 41, the 3rd charging aperture the 42, the 3rd discharging opening 43, cyclic steam import the 44, the 3rd outlet 45;Separator 5, separator 5 top and bottom are respectively equipped with cyclic steam outlet 51, discharge gate 52, and the side of separator 5 is provided with the 4th charging Mouth 53;MVR compressor assembly;Distillation water pot 7;Control system;Wherein said head tank 1 is by feed pump 11 and the first import 21 Connecting, described first discharging opening 22 is connected with the second charging aperture 31, and described second discharging opening 32 is connected with the 3rd charging aperture 42, institute Stating the 3rd discharging opening 43 to be connected with the 4th charging aperture 53, distillation water pot 7 is connected with water inlet 23 by water pump 71, and described second goes out The mouth of a river the 34, the 3rd outlet 45 is connected with distillation water pot 7 respectively, and described cyclic steam outlet 51 connection MVR compressor assembly is also Being connected with cyclic steam import 44 by MVR compressor assembly, described discharge gate 52 connects forced circulation pump 41, and by forcing Circulating pump 41 is connected with the 3rd charging aperture 42, the described external feeder of steam inlet 33, described control system respectively with charging Pump 11, water pump 71, MVR compressor assembly, forced circulation pump 41, feeder connect.

In the present embodiment, MVR compressor assembly includes at least two centrifugal compressors being serially connected 6, wherein separator 5 The cyclic steam outlet 51 of upper end is connected with First centrifugal compressor 6, last centrifugal compressor 6 and board-like forced circulation The cyclic steam import 44 of heat exchanger 4 connects.

Use such scheme, by arranging at least two centrifugal compressors being serially connected 6, it is ensured that to separator 5 Central Plains The steam that feed liquid produces carries out the intensification of abundance, improves the effect that heat exchange concentrates, and in the present embodiment, centrifugal compressor 6 is two.

In the present embodiment, control system is PLC control system.

In the present embodiment, the bottom of separator 5 is provided with densimeter and shows close and observe visor.

Use such scheme, by density of setting meter bottom separator 5 show close and observation visor, can Real Time Observation former Feed liquid whether qualified discharge.

In the present embodiment, the discharge gate 52 of separator 5 lower end connects circulation pipe and drainage conduit, wherein drainage conduit and pressure Circulating pump 41 connects.

Use such scheme, up to standard after concentrated solution discharge from drainage conduit, do not have after entrance circulation pipe up to standard by strong Circulating pump 41 processed enters board-like forced circulation heat exchanger 4 to be continued heat exchange and is concentrated into up to standard.

The work process of the present invention is as follows:

Raw material preheating: by feed pump 11, material liquid being entered distilled water plate type heat exchanger 2, water pump 71 will distillation water pot 7 simultaneously Middle distilled water enters distilled water plate type heat exchanger 2 and carries out heat exchange with raw material;Material liquid enters back into steam-plate type heat exchanger subsequently 3, fresh steam is entered steam-plate type heat exchanger 3 by feeder and material liquid carries out heat exchange simultaneously, subsequently enters board-like pressure Circulation heat exchanger 4;

Material liquid concentrates: the material liquid after heat exchange enters board-like forced circulation heat exchanger 4 and carries out heat exchange concentration, subsequently enters separation Device 5, material liquid is discharged by discharge gate 52 in separator 5 lower end, is again introduced into by material liquid by forced circulation pump strong 41 systems Board-like forced circulation heat exchanger 4 carries out heat exchange concentration;

Gas-liquid separation: the raw material after heat exchange concentrates enters separator 5, and the steam of the generation cyclic steam from separator 5 upper end goes out Mouth 51 enters MVR compressor assemblies and carries out pressurization intensification, and the indirect steam being warmed boosting enters board-like forced circulation heat exchanger 4 Carrying out heat exchange, concentrated solution up to standard discharge gate 52 bottom separator 5 is discharged;

Distilled water utilizes: the distilled water produced after steam-plate type heat exchanger 3 and the heat exchange of board-like forced circulation heat exchanger 4 enters and steams Distilled water tank 7, as the heat transferring medium of distilled water plate type heat exchanger 2.

Embodiment of above is only to be described the preferred embodiment of the present invention, not enters the scope of the present invention Row limits, on the premise of designing spirit without departing from the present invention, and this area ordinary skill technical staff technical side to the present invention Various deformation that case is made and improvement, all should fall in the protection domain that claims of the present invention determines.

Claims (7)

1. a plate type heat exchanger concentration systems, it is characterised in that include
Head tank;
Distilled water plate type heat exchanger, is provided with the first charging aperture, the first discharging opening, water inlet, the first outlet;
Steam-plate type heat exchanger, is provided with the second charging aperture, the second discharging opening, steam inlet, the second outlet;
Board-like forced circulation heat exchanger, including forced circulation pump, the 3rd charging aperture, the 3rd discharging opening, cyclic steam import, the 3rd Outlet;
Separator, separator top and bottom are respectively equipped with, cyclic steam exports, discharge gate, and the side of separator is provided with the 4th Charging aperture;MVR compressor assembly;Distillation water pot;Control system;
Wherein said head tank is connected by feed pump and the first import, and described first discharging opening and the second charging aperture connect, institute Stating the second discharging opening and the 3rd charging aperture connects, described 3rd discharging opening and the 4th charging aperture connect, and distillation water pot passes through water pump Being connected with water inlet, described second outlet, the 3rd outlet are connected with distillation water pot respectively, and the outlet of described cyclic steam connects MVR compressor assembly is also connected with cyclic steam import by MVR compressor assembly, and described discharge gate connects forced circulation pump, And by the connection of forced circulation pump and the 3rd charging aperture, the external feeder of described steam inlet, described control system respectively with Feed pump, water pump, MVR compressor assembly, forced circulation pump, feeder connect.
Plate type heat exchanger concentration systems the most according to claim 1, it is characterised in that described MVR compressor assembly includes At least two centrifugal compressors being serially connected, wherein the cyclic steam outlet of separator upper end is with First centrifugal compressor even Connecing, last centrifugal compressor is connected with the cyclic steam import of board-like forced circulation heat exchanger.
Plate type heat exchanger concentration systems the most according to claim 1, it is characterised in that described control system is PLC control System.
Plate type heat exchanger concentration systems the most according to claim 1, it is characterised in that the bottom of described separator is provided with Densimeter shows close and observes visor.
Plate type heat exchanger concentration systems the most according to claim 1, it is characterised in that the discharge gate of described separator lower end Connecting and have circulation pipe and drainage conduit, wherein drainage conduit is connected with forced circulation pump.
6. the concentration technology of a plate type heat exchanger concentration systems according to claim 1, it is characterised in that include following Step:
Raw material preheating: by feed pump, material liquid being entered distilled water plate type heat exchanger, water pump will distill in distillation water pot simultaneously Water enters distilled water plate type heat exchanger and carries out heat exchange with raw material;Material liquid enters back into steam-plate type heat exchanger subsequently, supplies simultaneously Fresh steam is entered steam-plate type heat exchanger and carries out heat exchange with material liquid by device, subsequently enters board-like forced circulation heat exchanger;
Material liquid concentrates: the material liquid after heat exchange enters board-like forced circulation heat exchanger and carries out heat exchange concentration, subsequently enters separation Device, material liquid discharged by discharge gate in separator lower end, by forced circulation pump force to be again introduced into material liquid board-like by force Circulation heat exchanger processed carries out heat exchange concentration;
Gas-liquid separation: the raw material after heat exchange concentrates enters separator, the cyclic steam outlet from separator upper end of the steam of generation Entering MVR compressor assembly and carry out pressurization intensification, the indirect steam board-like forced circulation heat exchanger of entrance being warmed boosting is carried out Heat exchange, concentrated solution up to standard is discharged at the discharge gate of separator bottom;
Distilled water utilizes: the distilled water produced after steam-plate type heat exchanger and board-like forced circulation heat exchanger heat exchange enters distillation Water pot, as the heat transferring medium of distilled water plate type heat exchanger.
The concentration technology of plate type heat exchanger concentration systems the most according to claim 6, it is characterised in that described feed pump, Water pump, MVR compressor assembly, forced circulation pump, feeder control work by control system.
CN201610305824.9A 2016-05-10 2016-05-10 Plate heat exchanger concentration system and concentration process thereof CN105833555A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109556330A (en) * 2019-01-31 2019-04-02 北京金茂绿建科技有限公司 A kind of efficient heat source tower antifreezing agent concentrating regenerative system and method

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CN105251233A (en) * 2015-11-26 2016-01-20 上海中腾环保科技有限公司 Falling film and MVR forced circulating evaporative crystallization system
CN105329961A (en) * 2015-10-29 2016-02-17 深圳市瑞升华科技股份有限公司 Waste water treatment system for recycling DMF at low cost
CN205598682U (en) * 2016-05-10 2016-09-28 深圳市瑞升华科技股份有限公司 Concentrated system of plate heat exchanger

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WO2005056152A1 (en) * 2003-12-11 2005-06-23 Gea Wiegand Gmbh Evaporation system
CN202226659U (en) * 2011-08-26 2012-05-23 深圳市瑞升华科技有限公司 Equipment evaporating sodium persulfate with low temperature
CN204034293U (en) * 2014-07-04 2014-12-24 南京高捷轻工设备有限公司 Lactic acid enrichment facility
CN104436724A (en) * 2014-11-05 2015-03-25 广州市心德实业有限公司 Traditional Chinese medicine leaching liquid MVR concentration process
CN104707349A (en) * 2015-02-05 2015-06-17 中国科学院理化技术研究所 Plate evaporator type MVC heat pump evaporation system
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109556330A (en) * 2019-01-31 2019-04-02 北京金茂绿建科技有限公司 A kind of efficient heat source tower antifreezing agent concentrating regenerative system and method

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Application publication date: 20160810