CN110180197A - A kind of multiple-effect Black Liquor Concentration system based on MVR - Google Patents
A kind of multiple-effect Black Liquor Concentration system based on MVR Download PDFInfo
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- CN110180197A CN110180197A CN201910330133.8A CN201910330133A CN110180197A CN 110180197 A CN110180197 A CN 110180197A CN 201910330133 A CN201910330133 A CN 201910330133A CN 110180197 A CN110180197 A CN 110180197A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/26—Multiple-effect evaporating
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- 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
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Abstract
The multiple-effect Black Liquor Concentration system based on MVR that the present invention provides a kind of, it is characterised in that: including thin liquid tank, multi-effect evaporator, MVR vapour compression machine, dope tank and external steam external steam gas pipeline；The thin liquid of the thin liquid tank is concentrated the multi-effect evaporator, and the MVR vapour compression machine will generate low-grade steam and be promoted to high-grade steam source through mechanical work in the concentration process provides part of heat energy for the multi-effect evaporator；The dope tank is used to store the black liquor after concentration, and the multi-effect evaporator adjusts back the black liquor in the dope tank to adjust the solid content of black liquor in itself body；Present invention energy consumption is low, can greatly improve energy-saving effect, improves lignin quality.
Description
Technical field
The present invention relates to lignin extraction technical field, especially a kind of multiple-effect Black Liquor Concentration system based on MVR.
Background technique
Lignin be in a kind of unbodied, molecular structure being widely present in plant containing oxo phenylpropanol or its
The armaticity high polymer of derivant structure unit can be used for reinforcing agent, miberal powder binder, be used as cement water reducing agent, scale preventative
With corrosion inhibiter, coal water slurry dispersing agent etc..
Traditional concentration technology mostly uses multiple-effect evaporation to be concentrated；Multiple-effect evaporation concentration be by multistage evaporation tank to material into
Row heating is concentrated, in traditional multistage evaporation tank concentration technology, when the generation of overfoaming phenomenon, foamover Matter Transfer to next stage
Tank body, the overfoaming phenomenon do not constitute influence on multistage evaporation；But there is following problems: 1, energy for traditional multistage evaporation
Amount consumption is high, provides heat source since every grade of evaporator requires steam, it is therefore desirable to quantity of steam it is very big, cause concentrated product cost
It greatly improves；2, multistage evaporation there are problems that it is solidifying dirt, either tubular type evaporation or plate evaporation, all can fouling, cause to steam
Sending out efficiency reduces, and only needs triple effect evaporation originally, with the increase for using the time, quadruple effect or five effects is needed to can be only achieved three
The effect of effect；3, at high cost, multiple-effect evaporation, one evaporation tank body of every increase, the tank body cost of early period and subsequent maintenance expense
With can all be multiplied；4, the tail gas generated in concentration process is more, pollutes environment.Therefore, how to accomplish energy conservation, save the cost,
It has been the project that this field is studied jointly, MVR is mechanical steam recompression technology (mechanical vapor
Recompression abbreviation) is the secondary steam and its energy generated using vapo(u)rization system itself, by low-grade steam
Mechanical work through compressor is promoted to high-grade steam source.It so recycles to vapo(u)rization system and thermal energy is provided, to reduce
One power-saving technology of the demand to outside resources.Most be afraid of to contain impurity in steam during use in the compressor of MVR,
Especially material foams, and can damage MVR equipment；Therefore, existing MVR evaporation technology can not be applied to Black Liquor Concentration field, such as
MVR is applied to evaporation process there are in the concentration technology of foamed phenomenon by what, is a problem to be solved, especially bamboo boiling
The black liquor of generation can generate a large amount of foams in evaporating concentration process, although foam inhibitor, not only foam inhibitor cost can be used
Height, inhibitory effect is poor, is unable to reach MVR system requirements, and will cause the lignin modification of successive refinements, reduces lignin
Quality.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of multiple-effect Black Liquor Concentration system based on MVR.
Present invention employs following methods to realize: a kind of multiple-effect Black Liquor Concentration system based on MVR, it is characterised in that:
Including thin liquid tank, multi-effect evaporator, MVR vapour compression machine, dope tank and external steam external steam gas pipeline；The multiple-effect
The thin liquid of the thin liquid tank is concentrated evaporator, and the MVR vapour compression machine will generate low-grade in the concentration process
Steam be promoted to high-grade steam source through mechanical work and provide part of heat energy for the multi-effect evaporator；The dope tank
For storing the black liquor after being concentrated, the multi-effect evaporator adjusts back the black liquor in the dope tank to adjust black liquor in itself body
Solid content.
Further, which includes infusion circulation, reinforcement circulation and tonifying Qi circulation；The multi-effect evaporator includes M1
Evaporation element, M2 evaporation element and M3 evaporation element, the infusion circulation include: the liquid outlet of the thin liquid tank through pipeline and
The inlet of one pump housing connects, and the liquid outlet of first pump housing is connect through pipeline with the inlet of the M2 evaporation element；Described
The liquid outlet of one pump housing is connected through the water outlet of pipeline and water pump, and the water inlet of the water pump is connect through pipeline with external water source；
The liquid outlet of the M2 evaporation element is connected through pipeline with the import of second pump housing, the outlet of second pump housing through pipeline with
The inlet of the M1 evaporation element connects, and is delivered to M1 evaporation element in favor of that will process rear black liquor in M2 evaporation element；
The liquid outlet of the M1 evaporation element is connected through pipeline with the import of the third pump housing, the outlet of the third pump housing through pipeline with
The inlet of the M3 evaporation element connects, and is delivered to M3 evaporation element in favor of that will process rear black liquor in M1 evaporation element；
The liquid outlet of the M3 evaporation element is connect through pipeline with the import of the 4th pump housing, and the outlet of the 4th pump housing is through pipeline and
The imports of five pump housings connects, and the outlet of the 5th pump housing is connect through pipeline with the inlet of dope tank, in favor of by solid content
Highly concentrated black liquor is exported into the dope tank for containing black liquor；
The reinforcement circulation includes: covering pump, and the import of the covering pump is connect through pipeline with the dope tank liquid outlet, described
The outlet of covering pump is connect through pipeline with the import of the M2 evaporation element, and the outlet of the covering pump is through pipeline and the third
The import of the pump housing connects, and the covering pump discharge is connect through pipeline with the import of second pump housing, in favor of will be in dope tank
The black liquor of high solids covers into multiple-effect vaporization chamber the black liquor solid content for increasing multiple-effect evaporation unit；
The tonifying Qi circulation includes: that defeated heat pump is provided on the external steam gas pipeline, the air intake warp of the defeated heat pump
External steam gas pipeline is connect with external steam source, the venthole of the defeated heat pump through external steam gas pipeline with it is described
The filling mouth of MVR vapour compression machine connects；The outlet of the MVR vapour compression machine will it is compressed after high-grade steam through pipeline with
The air intake of M1 evaporation element connects, and high-grade steam is through pipeline and M3 after the outlet of the MVR vapour compression machine will be compressed
The air intake of steam unit connects；The venthole of the M1 evaporation element connects through the air intake of pipeline and the M2 evaporation element
It connects, the venthole of the venthole of the M2 evaporation element and the M3 evaporation element is through pipeline and the MVR vapour compression machine
Air intake connection, in favor of M1 evaporation element, M2 evaporation element and M3 evaporation element by the low-grade steam after evaporation return
It is converted into high-grade steam in receipts to the MVR vapour compression machine, so that the supplement and recycling by completing steam recycle to increase
Add the black liquor solid content of the M1 vaporium, M2 vaporium and M3 vaporium.
Further, the M1 evaporation element includes M1 vaporization chamber and M1 circulating pump, the liquid outlet warp of the M1 vaporization chamber
Pipeline is connect with the import of the M1 circulating pump, and the outlet of the M1 circulating pump connects through the inlet of pipeline and the M1 vaporization chamber
It connects, reprocessing is carried out after processing black liquor in favor of M1 vaporization chamber and increases black liquor solid content；The M2 evaporation element includes
The liquid outlet of M2 vaporization chamber and M2 circulating pump, the M2 vaporization chamber is connect through pipeline with the import of the M2 circulating pump, the M2
The outlet of circulating pump is connect through pipeline with the inlet of the M2 vaporization chamber, is carried out after processing black liquor in favor of M2 vaporization chamber
Reprocessing increases black liquor solid content；The M3 evaporation element includes M3 heater and M3 vaporization chamber, and the M3 vaporization chamber goes out
Liquid mouth is connect through pipeline with the inlet of M3 heater, and the liquid outlet of the M3 heater connects through the import of pipeline and the 4th pump housing
It connects.
It further, further include condensation process, the condensation process includes the first condensate water pot and the second condensate water pot, institute
State M1 vaporization chamber discharge outlet, M2 vaporization chamber discharge outlet and M3 heater discharge outlet by the condensed water after evaporation through pipeline with it is described
The water inlet of first condensate water pot connects, and the water outlet of first condensate water pot is connect through pipeline with the import of the 6th pump housing,
The outlet of 6th pump housing is connect through pipeline with the import of second condensate water pot, described in favor of condensed water to be expelled to
Storage in second condensate water pot.
Further, there is heat exchanger between first pump housing and the 6th pump housing, so that water condensate storage process is
Black liquor in infusion circulation provides energy, so that black liquor is able to carry out pre-add heat effect；The M1 vaporization chamber, M2 vaporization chamber and M3
Incoagulable gas in heater is discharged by escape pipe.
Further, first pump housing, the 5th pump housing and the 6th pump housing are provided with stand-by pump in its bypass.
Further, it during the reinforcement when the solid content of black liquor in M2 vaporization chamber is low, opens covering pump and M2 is followed
The black liquor of high solids in dope tank, is covered into M2 vaporization chamber the solid content for increasing black liquor in M2 vaporization chamber by ring pump；Work as M1
When the solid content of black liquor is low in vaporization chamber, open covering pump and second pump housing, by the black liquor of high solids in dope tank cover to
Increase the solid content of black liquor in M1 vaporization chamber in M1 vaporization chamber；When the solid content of black liquor in M3 vaporization chamber is low, covering pump is opened
With the third pump housing, the black liquor of high solids in dope tank is covered into M3 vaporization chamber to increase and is consolidated containing for black liquor in M3 vaporization chamber
Amount.
Further, the initial black liquor solid content range in the thin liquid tank is 13%-14%, is evaporated through the M2 vaporization chamber
Black liquor solid content range is promoted to 24%-28% after processing, and black liquor solid content range is promoted to after the M1 vaporization chamber evaporation process
35%-38%, black liquor solid content range is promoted to 43%-46% after the M3 vaporization chamber evaporation process.
The beneficial effects of the present invention are: energy consumption is low, is preheated by heat exchanger to the black liquor that need to be handled,
Low-grade steam is converted by high-grade steam by MVR vapour compression machine again, while reducing quantity of steam, accelerates concentrated product
It generates；The insufficient black liquor of solid content is subjected to circulating and evaporating, solidifying dirty problem is reduced, greatly increases the efficiency of evaporation；It is at low cost, row
Tail gas is few out, reduces environmental pollution, and increases energy-saving effect, increases the solid content of black liquor by constantly covering, greatly reduce
The generation of foam, improves the quality of lignin in evaporation process.
Detailed description of the invention
Fig. 1 is first state system flow chart of the invention.
Fig. 2 is the corresponding data table for preventing black liquor from foaming.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Refering to Figure 1, the present invention provides an embodiments: a kind of multiple-effect Black Liquor Concentration system based on MVR, including
Thin liquid tank 1, multi-effect evaporator, MVR vapour compression machine 2, dope tank 3 and external steam external steam gas pipeline 4；The multiple-effect
The thin liquid of the thin liquid tank 1 is concentrated evaporator, and the MVR vapour compression machine 2 will generate low product in the concentration process
The steam of position is promoted to high-grade steam source through mechanical work and provides part of heat energy for the multi-effect evaporator；The dope
Tank 3 is used to store the black liquor after concentration, and the multi-effect evaporator adjusts back the black liquor in the dope tank 3 to adjust in itself body
The solid content of black liquor.
The system includes infusion circulation, reinforcement circulation and tonifying Qi circulation；The multi-effect evaporator includes M1 evaporation element
5, M2 evaporation element 6 and M3 evaporation element 7, the infusion circulation include: that the liquid outlet of the thin liquid tank 1 is pumped through pipeline and first
The inlet of body 8 connects, and the liquid outlet of first pump housing 8 is connect through pipeline with the inlet of the M2 evaporation element 6；Described first
The liquid outlet of the pump housing 8 is connect through pipeline with the water outlet of water pump 81, and the water inlet of the water pump 81 connects through pipeline and external water source
It connects；The liquid outlet of the M2 evaporation element 6 is connected through pipeline with the import of second pump housing 82, the outlet of second pump housing 82
It is connect through pipeline with the inlet of the M1 evaporation element 5, is delivered to M1 in favor of rear black liquor will be processed in M2 evaporation element 6
Evaporation element 5；The liquid outlet of the M1 evaporation element 5 is connected through pipeline with the import of the third pump housing 83, the third pump housing
83 outlet is connect through pipeline with the inlet of the M3 evaporation element 7, in favor of that will process rear black liquor in M1 evaporation element 5
It is delivered to M3 evaporation element 7；The liquid outlet of the M3 evaporation element 7 is connect through pipeline with the import of the 4th pump housing 84, and described
The outlet of four pump housings 84 is connect through pipeline with the import of the 5th pump housing 85, and the outlet of the 5th pump housing 85 is through pipeline and dope tank
3 inlet connection, in favor of exporting the highly concentrated black liquor of solid content into the dope tank 3 for containing black liquor；So that thin liquid tank 1
Black liquor and water progress Black Liquor Concentration reinforcement in M2 evaporation element 6 is delivered to through first pump housing 8 and water pump 81 with external water source to contain
Gu amount is handled, after M2 evaporation element 6 is processed, then it is delivered in M1 evaporation element 5 and is handled by M2 evaporation element 6, M1 evaporation is single
M3 evaporation element 7 is delivered to after member 5 is processed to be handled, and the high black liquor of solid content after concentration is finally subjected to storage use.
Wherein M2 evaporation element 6 is 1st effective evaporator, and M1 evaporation element 5 is 2nd effect evaporator, and M3 evaporation element 7 is half effect evaporator.
Thin liquid tank 1 can be multiple in the present invention, in favor of can constantly carry out black liquor supply.
The reinforcement circulation includes: covering pump 9, and the import of the covering pump 9 connects through pipeline and 3 liquid outlet of dope tank
It connects, the outlet of the covering pump 9 is connect through pipeline with the import of the M2 evaporation element 6, and the outlet of the covering pump 9 is through pipeline
It being connect with the import of the third pump housing 83,9 outlet of covering pump is connect through pipeline with the import of second pump housing 82, with
Contain admittedly conducive to the black liquor of high solids in dope tank 3 to be covered into multiple-effect vaporization chamber to the black liquor for increasing multiple-effect evaporation unit
Amount；So that can carry out when black liquid consistency deficiency in M1 evaporation element 5, M2 evaporation element 6 and M3 evaporation element 7 by concentration
High black liquor is covered, increase solid content is carried out, so that reducing foaming in evaporation process, circulate operation is constantly increased
Blacken liquid solid content.
The tonifying Qi circulation includes: that defeated heat pump 41 is provided on the external steam gas pipeline 4, the defeated heat pump 41
Air intake is connect through external steam gas pipeline 4 with external steam source, and the venthole of the defeated heat pump 41 is through the defeated vapour of external steam
Pipeline 4 is connect with the filling mouth 21 of the MVR vapour compression machine 2；After the outlet 22 of the MVR vapour compression machine 2 will be compressed
High-grade steam is connect through pipeline with the air intake of M1 evaporation element 5, and the outlet 22 of the MVR vapour compression machine 2 will be compressed
High-grade steam is connect through pipeline with the air intake of M3 steam unit 7 afterwards；The venthole of the M1 evaporation element 5 is through pipeline and institute
The air intake connection of M2 evaporation element 6 is stated, the venthole of the M2 evaporation element 6 and the venthole of the M3 evaporation element 7 are equal
It is connect through pipeline with the air intake 23 of the MVR vapour compression machine 2, in favor of M1 evaporation element 5, M2 evaporation element 6 and M3 steaming
Bill member 7 will be converted into high-grade steam in the low-grade Steam Recovery after evaporation to the MVR vapour compression machine 2, so that
It is recycled by the supplement and recycling of completing steam and is contained to increase the black liquor of the M1 vaporium 5, M2 vaporium 6 and M3 vaporium 7
Gu amount.So that the low-grade steam of external complement is converted into high-grade steam by MVR vapour compression machine 2, accelerate the concentration of black liquor,
Reinforce black liquor solid content with this.
The M1 evaporation element 5 includes M1 vaporization chamber 51 and M1 circulating pump 52, and the liquid outlet 53 of the M1 vaporization chamber 51 passes through
Pipeline is connect with the import of the M1 circulating pump 52, the outlet of the M1 circulating pump 52 through pipeline and the M1 vaporization chamber 51 into
Liquid mouth 54 connects, and reprocessing is carried out after processing black liquor in favor of M1 vaporization chamber 51 and increases black liquor solid content；The M2 steams
Bill member 6 includes M2 vaporization chamber 61 and M2 circulating pump 62, and the liquid outlet 63 of the M2 vaporization chamber 61 is recycled through pipeline and the M2
The import connection of pump 62, the outlet of the M2 circulating pump 62 is connect through pipeline with the inlet 64 of the M2 vaporization chamber 61, with benefit
Reprocessing, which is carried out, after M2 vaporization chamber 61 is processed by black liquor increases black liquor solid content；The M3 evaporation element 7 adds including M3
The liquid outlet 73 of hot device 71 and M3 vaporization chamber 72, the M3 vaporization chamber 72 is connect through pipeline with the inlet 74 of M3 heater 71,
The liquid outlet 75 of the M3 heater 71 is connect through pipeline with the import of the 4th pump housing 84.
The preferable model HY-25 of evaporator in the present invention, but it is not limited only to this.
It further include condensation process, the condensation process includes the first condensate water pot 10 and the second condensate water pot 11, the M1
51 discharge outlet 55 of vaporization chamber, 61 discharge outlet 65 of M2 vaporization chamber and 71 discharge outlet 76 of M3 heater are by the condensed water after evaporation through pipe
Road is connect with the water inlet of first condensate water pot 10, and the water outlet of first condensate water pot 1 is through pipeline and the 6th pump housing
12 import connection, the outlet of the 6th pump housing 12 are connect through pipeline with the import of second condensate water pot 11, in favor of
Condensed water is expelled in second condensate water pot 11 and is stored.
There is heat exchanger 13 between first pump housing 8 and the 6th pump housing 12, so that water condensate storage process is infusion
Black liquor in circulation provides energy, so that black liquor is able to carry out pre-add heat effect；The M1 vaporization chamber 51, M2 vaporization chamber 61 and M3
Incoagulable gas in heater 71 passes through escape pipe 14 and is discharged.So that passing through heat before black liquor enters M2 vaporization chamber 61
Interchanger is preheated, so that black liquor can be evaporated concentration reinforcing after entering multistage evaporation room faster.
First pump housing 8, the 5th pump housing 85 and the 6th pump housing 12 are provided with stand-by pump 15 in its bypass.So that
When first pump housing 8, the 5th pump housing 85 and the 6th pump housing 12 damage, it stand-by pump 15 can be used to be operated, continue to complete circulation industrial
Make.
During the reinforcement when the solid content of black liquor in M2 vaporization chamber 61 is low, covering pump 9 and M2 circulating pump 62 is opened,
The black liquor of high solids in dope tank is covered into M2 vaporization chamber 61 to the solid content for increasing black liquor in M2 vaporization chamber 61；When M1 steams
When the solid content of black liquor is low in hair room 51, covering pump 9 and second pump housing 82 are opened, the black liquor of high solids in dope tank 3 is returned
Mend the solid content for increasing black liquor in M1 vaporization chamber 51 into M1 vaporization chamber 51；When the solid content of black liquor in M3 vaporization chamber 72 is low,
Covering pump 9 and the third pump housing 83 are opened, the black liquor of high solids in dope tank 3 is covered into M3 vaporization chamber 72 and increases M3 evaporation
The solid content of black liquor in room 72.
It please refers to shown in Fig. 2, the initial black liquor solid content range in the thin liquid tank 1 is 13%-14%, is evaporated through the M2
Black liquor solid content range is promoted to 24%-28%, black liquor solid content after 51 evaporation process of M1 vaporization chamber after 61 evaporation process of room
Range is promoted to 35%-38%, and black liquor solid content range is promoted to 43%-46% after 72 evaporation process of M3 vaporization chamber.
When the initial black liquor solid content range in thin liquid tank 1 is 15%-16% in the present invention, through the M2 vaporization chamber 61 evaporation
Black liquor solid content range is promoted to 26%-30% after processing, and black liquor solid content range is promoted after 51 evaporation process of M1 vaporization chamber
To 35%-39%, black liquor solid content range is promoted to 45%-48% after 72 evaporation process of M3 vaporization chamber.
Controlled valve 20 is provided in the present invention on each pipeline, in favor of the connection and closure of pipeline.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (8)
1. a kind of multiple-effect Black Liquor Concentration system based on MVR, it is characterised in that: including thin liquid tank, multi-effect evaporator, MVR steam
Compressor, dope tank and external steam external steam gas pipeline；The multi-effect evaporator carries out the thin liquid of the thin liquid tank
Concentration, the MVR vapour compression machine will generate low-grade steam and be promoted to high-grade through mechanical work in the concentration process
Steam source provide part of heat energy for the multi-effect evaporator；The dope tank is used to store the black liquor after concentration, described more
Effect evaporator adjusts back the black liquor in the dope tank to adjust the solid content of black liquor in itself body.
2. a kind of multiple-effect Black Liquor Concentration system based on MVR according to claim 1, it is characterised in that: the system includes
Infusion circulation, reinforcement circulation and tonifying Qi circulation；The multi-effect evaporator includes M1 evaporation element, M2 evaporation element and M3 evaporation
Unit, the infusion circulation include: that the liquid outlet of the thin liquid tank is connect through pipeline with the inlet of first pump housing, first pump housing
Liquid outlet connect through pipeline with the inlet of the M2 evaporation element；The liquid outlet of first pump housing is through pipeline and water pump
Water outlet connection, the water inlet of the water pump are connect through pipeline with external water source；The liquid outlet of the M2 evaporation element is through pipeline
It is connected with the import of second pump housing, the outlet of second pump housing is connect through pipeline with the inlet of the M1 evaporation element,
M1 evaporation element is delivered in favor of rear black liquor will be processed in M2 evaporation element；The liquid outlet of the M1 evaporation element is through pipeline
It is connected with the import of the third pump housing, the outlet of the third pump housing is connect through pipeline with the inlet of the M3 evaporation element,
M3 evaporation element is delivered in favor of rear black liquor will be processed in M1 evaporation element；The liquid outlet of the M3 evaporation element is through pipeline
It is connect with the import of the 4th pump housing, the outlet of the 4th pump housing is connect through pipeline with the import of the 5th pump housing, the 5th pump
The outlet of body is connect through pipeline with the inlet of dope tank, in favor of exporting the highly concentrated black liquor of solid content to splendid attire black liquor
In dope tank；
The reinforcement circulation includes: covering pump, and the import of the covering pump is connect through pipeline with the dope tank liquid outlet, described
The outlet of covering pump is connect through pipeline with the import of the M2 evaporation element, and the outlet of the covering pump is through pipeline and the third
The import of the pump housing connects, and the covering pump discharge is connect through pipeline with the import of second pump housing, in favor of will be in dope tank
The black liquor of high solids covers into multiple-effect vaporization chamber the black liquor solid content for increasing multiple-effect evaporation unit；
The tonifying Qi circulation includes: that defeated heat pump is provided on the external steam gas pipeline, the air intake warp of the defeated heat pump
External steam gas pipeline is connect with external steam source, the venthole of the defeated heat pump through external steam gas pipeline with it is described
The filling mouth of MVR vapour compression machine connects；The outlet of the MVR vapour compression machine will it is compressed after high-grade steam through pipeline with
The air intake of M1 evaporation element connects, and high-grade steam is through pipeline and M3 after the outlet of the MVR vapour compression machine will be compressed
The air intake of steam unit connects；The venthole of the M1 evaporation element connects through the air intake of pipeline and the M2 evaporation element
It connects, the venthole of the venthole of the M2 evaporation element and the M3 evaporation element is through pipeline and the MVR vapour compression machine
Air intake connection, in favor of M1 evaporation element, M2 evaporation element and M3 evaporation element by the low-grade steam after evaporation return
It is converted into high-grade steam in receipts to the MVR vapour compression machine, so that the supplement and recycling by completing steam recycle to increase
Add the black liquor solid content of the M1 vaporium, M2 vaporium and M3 vaporium.
3. a kind of multiple-effect Black Liquor Concentration system based on MVR according to claim 2, it is characterised in that: the M1 evaporation
Unit includes M1 vaporization chamber and M1 circulating pump, and the liquid outlet of the M1 vaporization chamber connects through the import of pipeline and the M1 circulating pump
It connects, the outlet of the M1 circulating pump is connect through pipeline with the inlet of the M1 vaporization chamber, so that M1 vaporization chamber will be at black liquor
Reason carries out reprocessing later and increases black liquor solid content；The M2 evaporation element includes M2 vaporization chamber and M2 circulating pump, the M2
The liquid outlet of vaporization chamber is connect through pipeline with the import of the M2 circulating pump, and the outlet of the M2 circulating pump is through pipeline and the M2
The inlet of vaporization chamber connects, and reprocessing is carried out after processing black liquor in favor of M2 vaporization chamber and increases black liquor solid content；Institute
Stating M3 evaporation element includes M3 heater and M3 vaporization chamber, feed liquor of the liquid outlet of the M3 vaporization chamber through pipeline Yu M3 heater
Mouth connection, the liquid outlet of the M3 heater are connect through pipeline with the import of the 4th pump housing.
4. a kind of multiple-effect Black Liquor Concentration system based on MVR according to claim 3, it is characterised in that: further include condensation
Process, the condensation process include the first condensate water pot and the second condensate water pot, the M1 vaporization chamber discharge outlet, M2 vaporization chamber row
Condensed water after evaporation is connect through pipeline with the water inlet of first condensate water pot by the mouth of a river and M3 heater discharge outlet, institute
The water outlet for stating the first condensate water pot is connect through pipeline with the import of the 6th pump housing, and the outlet of the 6th pump housing is through pipeline and institute
The import connection for stating the second condensate water pot, stores in favor of condensed water to be expelled in second condensate water pot.
5. a kind of multiple-effect Black Liquor Concentration system based on MVR according to claim 4, it is characterised in that: first pump
There is heat exchanger between body and the 6th pump housing, so that water condensate storage process provides energy for the black liquor in infusion circulation, makes
It obtains black liquor and is able to carry out pre-add heat effect；Incoagulable gas in the M1 vaporization chamber, M2 vaporization chamber and M3 heater passes through
Escape pipe discharge.
6. a kind of multiple-effect Black Liquor Concentration system based on MVR according to claim 4, it is characterised in that: first pump
Body, the 5th pump housing and the 6th pump housing are provided with stand-by pump in its bypass.
7. a kind of multiple-effect Black Liquor Concentration system based on MVR according to claim 3, it is characterised in that: the reinforcement mistake
In journey when the solid content of black liquor in M2 vaporization chamber is low, open covering pump and M2 circulating pump, by dope tank high solids it is black
Liquid covers into M2 vaporization chamber the solid content for increasing black liquor in M2 vaporization chamber；When the solid content of black liquor in M1 vaporization chamber is low, open
Covering pump and second pump housing are opened, the black liquor of high solids in dope tank is covered into M1 vaporization chamber and increases black liquor in M1 vaporization chamber
Solid content；When the solid content of black liquor in M3 vaporization chamber is low, covering pump and the third pump housing are opened, by high solids in dope tank
Black liquor cover into M3 vaporization chamber increase M3 vaporization chamber in black liquor solid content.
8. a kind of multiple-effect Black Liquor Concentration system based on MVR according to claim 3, it is characterised in that: the thin liquid tank
Interior initial black liquor solid content range is 13%-14%, and black liquor solid content range is promoted to after the M2 vaporization chamber evaporation process
24%-28%, black liquor solid content range is promoted to 35%-38%, the M3 vaporization chamber evaporated after the M1 vaporization chamber evaporation process
Black liquor solid content range is promoted to 43%-46% after reason.
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| CN201910330133.8A CN110180197A (en) | 2019-04-23 | 2019-04-23 | A kind of multiple-effect Black Liquor Concentration system based on MVR |
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| CN201910330133.8A CN110180197A (en) | 2019-04-23 | 2019-04-23 | A kind of multiple-effect Black Liquor Concentration system based on MVR |
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| CN201910330133.8A Pending CN110180197A (en) | 2019-04-23 | 2019-04-23 | A kind of multiple-effect Black Liquor Concentration system based on MVR |
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| CN (1) | CN110180197A (en) |
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| CN108217789A (en) * | 2018-01-12 | 2018-06-29 | 无锡宝南机器制造有限公司 | A kind of MVR plate type rising and falling film evaporators black liquor processing system |
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Application publication date: 20190830 |