CN107754357A - Twin-stage MVR evaporative crystallization techniques and equipment - Google Patents

Twin-stage MVR evaporative crystallization techniques and equipment Download PDF

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Publication number
CN107754357A
CN107754357A CN201711211405.XA CN201711211405A CN107754357A CN 107754357 A CN107754357 A CN 107754357A CN 201711211405 A CN201711211405 A CN 201711211405A CN 107754357 A CN107754357 A CN 107754357A
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CN
China
Prior art keywords
level
liquid
stage
compressor
twin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201711211405.XA
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Chinese (zh)
Inventor
郭金光
雷春栋
张东庆
郑志
辛玲玲
肖作琛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Bozhong Vacuum Equipment Co Ltd
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Shandong Bozhong Vacuum Equipment Co Ltd
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Priority to CN201711211405.XA priority Critical patent/CN107754357A/en
Publication of CN107754357A publication Critical patent/CN107754357A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/0094—Evaporating with forced circulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/0082—Regulation; Control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/04—Evaporators with horizontal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/26—Multiple-effect evaporating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/28—Evaporating with vapour compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/28—Evaporating with vapour compression
    • B01D1/2884—Multiple effect compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/28—Evaporating with vapour compression
    • B01D1/289—Compressor features (e.g. constructions, details, cooling, lubrication, driving systems)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/30—Accessories for evaporators ; Constructional details thereof
    • B01D1/305—Demister (vapour-liquid separation)
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C315/00—Preparation of sulfones; Preparation of sulfoxides
    • C07C315/06—Separation; Purification; Stabilisation; Use of additives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination

Abstract

Present invention is mainly applied to Chemical Engineering and Technology field, more particularly to a kind of twin-stage MVR evaporative crystallization techniques and equipment, technique is that material liquid is inputted into the heating of one-level evaporator, feed liquid input one-level separation chamber after heating carries out vapor-liquid separation, gained liquid phase inputs secondary evaporimeter heating together with the liquid phase after the circulation feed liquid of the second-order separation room, desalination, feed liquid input the second-order separation room after heating carries out vapor-liquid separation, the input desalter desalination of gained liquid phase；Vapour phase is after split-compressor compresses obtained by the second-order separation room, stage compressor is inputted with together with vapour phase obtained by one-level separation chamber, after stage compressor compresses, one-level evaporator and secondary evaporimeter is inputted respectively as thermal source to heat to feed liquid, lime set is condensed into after heating, input lime set storage tank collects discharge.By the implementation of the process and equipment, equipment investment can be substantially reduced, reduces process energy consumption, simplifies technological operation and control.

Description

Twin-stage MVR evaporative crystallization techniques and equipment
Technical field
The present invention relates to a kind of twin-stage MVR evaporative crystallization techniques and equipment, Chemical Engineering and Technology field is mainly used in.
Background technology
In the production and application process of dimethyl sulfoxide (DMSO), the desalination and recovery of dimethyl sulfoxide (DMSO) are essential technique Demand.The desalinating process of dimethyl sulfoxide (DMSO) is typically realized using the method for evaporation.In process of production, evaporation needs external steam Heat is provided, the dimethyl sulfoxide (DMSO) evaporated also needs to carry out condensation recovery, because dimethyl sulfoxide (DMSO) is in the temperature more than 140 DEG C It is lower easily to decompose, it could even be possible to causing work safety accident.In order to improve the product quality of dimethyl sulfoxide (DMSO), ensure production peace Entirely, the temperature in production process should be less than 100 DEG C.Under above manufacturing technique requirent, existing production technology equipment investment is big, work Skill high energy consumption, technological operation and control are complicated.
The content of the invention
The technical problem to be solved in the present invention is：A kind of twin-stage MVR evaporative crystallization techniques and equipment are provided, meeting diformazan In the case of the desalination quality of production and technological requirement of the materials such as base sulfoxide, it is possible to reduce equipment investment, reduce process energy consumption, letter Change operational control, improve production efficiency and reliability.
Twin-stage MVR evaporative crystallization techniques of the present invention, material liquid is inputted into one-level evaporator, feed liquid is evaporated in one-level Heated in device, one-level separation chamber is inputted after heating and carries out vapor-liquid separation, gained liquid phase is together with the circulation feed liquid of the second-order separation room Input secondary evaporimeter continues to heat, and the second-order separation room is inputted after heating and carries out vapor-liquid separation, liquid phase obtained by the second-order separation room is defeated Enter desalter desalination, the liquid phase after desalination inputs secondary evaporimeter and continues heating evaporation again, vapour phase warp obtained by the second-order separation room After split-compressor compression, stage compressor is inputted together with vapour phase obtained by one-level separation chamber, after stage compressor compresses, is made Input one-level evaporator and secondary evaporimeter respectively for thermal source to heat to feed liquid, lime set is condensed into after heating, input lime set storage tank Collect discharge.
Described one-level evaporator is identical with the evaporating temperature of secondary evaporimeter.
The pressure of described one-level separation chamber is higher than the pressure of the second-order separation room.
Described one-level evaporator, one-level separation chamber, stage compressor, secondary evaporimeter, the second-order separation room, two-stage compression The operating pressure of machine and lime set storage tank is vacuum state.
Twin-stage MVR evaporation crystallization equipments of the present invention, including one-level evaporator and secondary evaporimeter, one-level evaporator Entrance is communicated in raw material feeding pipe, and outlet is in one-level separation chamber；Secondary evaporimeter entrance and exit and the second-order separation room Between form circulation line, the second-order separation room is communicated in desalter, the liquid phase and desalter of one-level separation chamber by liquid phase Liquid phase after desalination is respectively communicated with the arrival end of the secondary evaporimeter in circulation line；One-level separation chamber is communicated in one by vapour phase Level suction port of compressor, the second-order separation room are communicated in split-compressor entrance by vapour phase, and split-compressor outlet is in one-level Suction port of compressor；One-level evaporator and secondary evaporimeter heating side entrance are respectively communicated with to go out in stage compressor outlet, heated side Mouth is respectively communicated with lime set storage tank.
Described one-level evaporator is falling film evaporator.
Described secondary evaporimeter is forced circulation evaporator with horizontal tubes.
Described stage compressor and the species of split-compressor include lobed rotor compressor and centrifugal compressor.
The beneficial effects of the invention are as follows：
This method is carrying out the desalination and recovery of the heat sensitive materials such as dimethyl sulfoxide (DMSO) using twin-stage MVR evaporative crystallization techniques During, feed liquid raises, dimethyl sulphoxide solution evaporating temperature after the concentration of one-level evaporator evaporation with the concentration of salt Increase, by the setting of split-compressor, the pressure of the second-order separation room is less than one-level separation chamber, it is possible to achieve two level is steamed Hair device meets manufacturing technique requirent in the case where not improving evaporating temperature.In operational process of craft, one-level evaporator and two The heat source of level evaporator is that the steam evaporated by itself provides after compressor compresses, it is not necessary to which external steam carries For greatly reducing the consumption of external steam；The steam (i.e. dimethyl sulfoxide (DMSO)) evaporated to evaporator while heating, certainly Body is condensed into lime set, eliminates process equipment and the technique consumption of steam condensation；Compared with traditional evaporation technology, this method and Device structure is simple, and control point is few, greatly reduces equipment investment, simplifies technological operation and control.
By the implementation of this method and equipment, ensureing wanting for the desalination production technology of the heat sensitive materials such as dimethyl sulfoxide (DMSO) Ask down, equipment investment can be substantially reduced, reduce process energy consumption, simplify technological operation and control.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure：1st, one-level evaporator；2nd, stage compressor；3rd, split-compressor；4th, the second-order separation room；5th, dual evaporation Device；6th, one-level separation chamber；7th, lime set storage tank；8th, desalter.
Embodiment
The present invention is described further below in conjunction with the accompanying drawings：
As shown in figure 1, twin-stage MVR evaporative crystallization techniques of the present invention, one-level evaporator 1, material are inputted by material liquid Liquid is heated in one-level evaporator 1, and one-level separation chamber 6 is inputted after heating and carries out vapor-liquid separation, gained liquid phase and the second-order separation room 4 Circulation feed liquid input secondary evaporimeter 5 together and continue to heat, the second-order separation room 4 is inputted after heating and carries out vapor-liquid separation, two level The input desalination of desalter 8 of separation chamber 4 gained liquid phase, the liquid phase after desalination input secondary evaporimeter 5 and continue heating evaporation again, and two The level gained vapour phase of separation chamber 4 inputs stage compressor after the compression of split-compressor 3 together with the gained vapour phase of one-level separation chamber 6 2, after the compression of stage compressor 2, input one-level evaporator 1 and secondary evaporimeter 5 respectively as thermal source and heated to feed liquid, heating After be condensed into lime set, input lime set storage tank 7 collects discharge.One-level evaporator 1 is identical with the evaporating temperature of secondary evaporimeter 5.One The pressure of level separation chamber 6 is higher than the pressure of the second-order separation room 4.One-level evaporator 1, one-level separation chamber 6, stage compressor 2, two level Evaporator 5, the second-order separation room 4, the operating pressure of split-compressor 3 and lime set storage tank 7 are vacuum state.
Twin-stage MVR evaporation crystallization equipments of the present invention, including one-level evaporator 1 and secondary evaporimeter 5, one-level evaporation The entrance of device 1 is communicated in raw material feeding pipe, and outlet is in one-level separation chamber 6；The entrance and exit of secondary evaporimeter 5 and two fractions From circulation line is formed between room 4, the second-order separation room 4 is communicated in desalter 8 by liquid phase, after one-level separation chamber 6 separates Liquid phase after liquid phase and desalination is respectively communicated with the arrival end of the secondary evaporimeter 5 in circulation line；One-level separation chamber 6 passes through vapour phase The entrance of stage compressor 2 is communicated in, the second-order separation room 4 is communicated in the entrance of split-compressor 3 by vapour phase, and split-compressor 3 goes out Mouth is communicated in the entrance of stage compressor 2；One-level evaporator 1 and secondary evaporimeter 5 heat side entrance and are respectively communicated with one stage of compression Machine 2 is exported, and heating side outlet is respectively communicated with lime set storage tank 7.One-level evaporator 1 is falling film evaporator.Secondary evaporimeter 5 is strong Cyclical level column tube evaporimeter processed.The species of stage compressor 2 and split-compressor 3 includes lobed rotor compressor and centrifugal compressed Machine.
Embodiment：
In material liquid, dimethyl sulfoxide (DMSO) content 32%wt, 15%wt containing sodium nitrate, desalting processing is carried out, and reclaim Recycle dimethyl sulfoxide (DMSO) therein.Material liquid is inputted into one-level evaporator 1 (treating capacity 1500kg/h) by raw material pipeline, it is former 57 DEG C of feed temperature, the operating parameter of one-level separation chamber 6 are：Evaporating pressure 7kPa, 98 DEG C of evaporating temperature；The behaviour of the second-order separation room 4 It is as parameter：Evaporating pressure 3kPa, 98 DEG C of evaporating temperature.In the present embodiment, what lime set storage tank 7 was collected is to need back after desalination The dimethyl sulfoxide (DMSO) product of receipts.

Claims (8)

  1. A kind of 1. twin-stage MVR evaporative crystallization techniques, it is characterised in that：By material liquid input one-level evaporator (1), feed liquid is in one-level Heated in evaporator (1), one-level separation chamber (6) are inputted after heating and carry out vapor-liquid separation, gained liquid phase and the second-order separation room (4) Circulation feed liquid inputs secondary evaporimeter (5) and continues to heat together, input the second-order separation room (4) progress vapor-liquid separation after heating, and two Liquid phase input desalter (8) desalination obtained by level separation chamber (4), the liquid phase after desalination input secondary evaporimeter (5) and continue to add again Heat, vapour phase obtained by the second-order separation room (4) input after split-compressor (3) compression together with vapour phase obtained by one-level separation chamber (6) Stage compressor (2), after stage compressor (2) compression, input one-level evaporator (1) and secondary evaporimeter respectively as thermal source (5) heated to feed liquid, lime set is condensed into after heating, input lime set storage tank (7) is collected.
  2. 2. twin-stage MVR evaporative crystallization techniques according to claim 1, it is characterised in that：One-level evaporator (1) and two level are steamed The evaporating temperature for sending out device (5) is identical.
  3. 3. twin-stage MVR evaporative crystallization techniques according to claim 1, it is characterised in that：The pressure of one-level separation chamber (6) is high Pressure in the second-order separation room.
  4. 4. twin-stage MVR evaporative crystallization techniques according to claim 1, it is characterised in that：One-level evaporator (1), a fraction From room (6), stage compressor (2), secondary evaporimeter (5), the second-order separation room (4), split-compressor (3) and lime set storage tank (7) Operating pressure be vacuum state.
  5. A kind of 5. twin-stage MVR evaporation crystallization equipments, it is characterised in that：Including one-level evaporator (1) and secondary evaporimeter (5), one Level evaporator (1) entrance is communicated in raw material feeding pipe, and outlet is in one-level separation chamber (6)；Secondary evaporimeter (5) entrance and Circulation line is formed between outlet and the second-order separation room (4), the second-order separation room (4) are communicated in desalter (8) by liquid phase, and one Liquid phase after the liquid phase of level separation chamber (6) and desalter (8) desalination is respectively communicated with the secondary evaporimeter (5) in circulation line Arrival end；Vapour phase after one-level separation chamber (6) separation is communicated in stage compressor (2) entrance, after the second-order separation room (4) separation Vapour phase is communicated in split-compressor (3) entrance, and split-compressor (3) outlet is in stage compressor (2) entrance；One-level is evaporated Device (1) and secondary evaporimeter (5) heating side entrance are respectively communicated with and exported in stage compressor (2), and heating side outlet is respectively communicated with In lime set storage tank (7).
  6. 6. twin-stage MVR evaporation crystallization equipments according to claim 5, it is characterised in that：One-level evaporator (1) steams for falling liquid film Send out device.
  7. 7. twin-stage MVR evaporation crystallization equipments according to claim 5, it is characterised in that：Secondary evaporimeter (5) follows for pressure Ring evaporator with horizontal tubes.
  8. 8. twin-stage MVR evaporation crystallization equipments according to claim 5, it is characterised in that：Stage compressor (2) and two level pressure The species of contracting machine (3) includes lobed rotor compressor and centrifugal compressor.
CN201711211405.XA 2017-11-28 2017-11-28 Twin-stage MVR evaporative crystallization techniques and equipment Withdrawn CN107754357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711211405.XA CN107754357A (en) 2017-11-28 2017-11-28 Twin-stage MVR evaporative crystallization techniques and equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711211405.XA CN107754357A (en) 2017-11-28 2017-11-28 Twin-stage MVR evaporative crystallization techniques and equipment

Publications (1)

Publication Number Publication Date
CN107754357A true CN107754357A (en) 2018-03-06

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711211405.XA Withdrawn CN107754357A (en) 2017-11-28 2017-11-28 Twin-stage MVR evaporative crystallization techniques and equipment

Country Status (1)

Country Link
CN (1) CN107754357A (en)

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Application publication date: 20180306