CN109529401A - Trimethylolethane trimethacrylate imitates evaporating, concentrating and crystallizing system and its application - Google Patents
Trimethylolethane trimethacrylate imitates evaporating, concentrating and crystallizing system and its application Download PDFInfo
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- CN109529401A CN109529401A CN201910081595.0A CN201910081595A CN109529401A CN 109529401 A CN109529401 A CN 109529401A CN 201910081595 A CN201910081595 A CN 201910081595A CN 109529401 A CN109529401 A CN 109529401A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0018—Evaporation of components of the mixture to be separated
- B01D9/0031—Evaporation of components of the mixture to be separated by heating
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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
- B01D9/00—Crystallisation
- B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/78—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by condensation or crystallisation
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Abstract
The present invention relates to a kind of trimethylolethane trimethacrylate effect evaporating, concentrating and crystallizing system and its applications, belong to condensing crystallizing technical field.Wherein 1st effective evaporator forms circulation path by pipeline and an effect crystallizer, an effect circulating pump, 2nd effect evaporator forms circulation path by pipeline and two effect crystallizers, two effect circulating pumps, and triple effect evaporator is by pipeline and triple effect crystallizer, triple effect cycle pump group at circulation path；Heat exchanger feed inlet is connected with feed pipe, and discharge port is connected with triple effect evaporator feed inlet by pipeline.The present invention is designed and is researched and developed by the production technology and feature for being directed to trimethylolethane, develop a set of method trimethylolethane trimethacrylate effect evaporating, concentrating and crystallizing system and carry out trimethylolethane condensing crystallizing using the system, the invention substantially reduces the purifying technique route of trimethylolethane by dexterously effectively combining evaporation concentration technique, multiple-effect evaporation technology, evaporative crystallization technique.
Description
Technical field
The present invention relates to a kind of trimethylolethane trimethacrylate effect evaporating, concentrating and crystallizing system and its applications, belong to condensing crystallizing skill
Art field.
Background technique
Trimethylolethane (abbreviation TME) be it is a kind of it is tasteless, flow freely, white crystalline solid, be a kind of important anti-
Answering property polyol intermediate and fine chemical product, mainly for the production of the resin of specific function, the covering of titanium dioxide.Closely
Nian Lai is also received significant attention as phase change heat-storing material, and trimethylolethane can provide excellent stability, is improved anti-
Heat, light, hydrolysis and oxidation susceptibility, and there is outstanding weatherability, glossiness and chemical resistance, application field has been extended to
Medical treatment, health care, automobile, military etc..
As demand of the market to the product is continuously increased, to purity, granularity of product etc., more stringent requirements are proposed.
Trimethylolethane using crystallization separating-purifying is carried out to it, existing trimethylolethane purifying technique is cumbersome, yield compared with
Low, product quality is poor, and production cost is higher, seriously constrains the application development of trimethylolethane.
Summary of the invention
It is an object of the invention to overcome drawbacks described above and deficiency, a kind of trimethylolethane trimethacrylate effect evaporation and concentration knot is provided
Crystallographic system system and its application, can be applied in the production technology of trimethylolethane, realize condensing crystallizing continuous production, improve
Product yield and product quality.
Technical solution of the present invention, trimethylolethane trimethacrylate imitate evaporating, concentrating and crystallizing system, including 1st effective evaporator, two effects
Evaporator, triple effect evaporator, an effect crystallizer, two effect crystallizers, triple effect crystallizer, first-class heat exchanger, secondary heat exchanger, an effect
Circulating pump, one effect discharging pump, two effect circulating pumps, two effect discharging pumps, triple effect cycle pump, triple effect discharging pump, condenser, vacuum pump,
Level-one condensate water pot, B-grade condensation water pot, three-level condensate water pot, level-one condensate pump, B-grade condensation water pump, three-level condensate pump
And heat exchanger；
The 1st effective evaporator forms circulation path by pipeline and an effect crystallizer, an effect circulating pump, and 2nd effect evaporator passes through
Pipeline and two effect crystallizers, two effect circulating pumps form circulation path, and triple effect evaporator is followed by pipeline and triple effect crystallizer, triple effect
Ring pump group is at circulation path；The one effect crystallizer forms circulation path by pipeline and an effect discharging pump, and two effect crystallizers are logical
Piping and two effect discharging pumps form circulation path, and triple effect crystallizer forms circulation path by pipeline and triple effect discharging pump；
The one effect discharging pump discharge port is connected with an effect discharge pipe and triple effect evaporator feed inlet by pipeline respectively, and two
Effect discharging pump discharge port is connected with first-class heat exchanger feed inlet by pipeline, first-class heat exchanger discharge port and 1st effective evaporator into
Material mouth is connected by pipeline, and triple effect discharging pump discharge port is connected with secondary heat exchanger feed inlet by pipeline, secondary heat exchange
Device discharge port is connected with 2nd effect evaporator feed inlet by pipeline；Heat exchanger feed inlet is connected with feed pipe, heat exchanger
Discharge port is connected with triple effect evaporator feed inlet by pipeline；
The 1st effective evaporator, 2nd effect evaporator and triple effect evaporator are respectively equipped with vacuum valve and condenser at two and pass through pipeline phase
Connection, first-class heat exchanger and secondary heat exchanger are respectively equipped with vacuum valve at one and are connected with condenser by pipeline, and condenser is set
There is vacuum valve at two to be connected with vacuum pump by pipeline, condenser be equipped with circulating water intake, circulating water outlet, respectively with circulation
Water water inlet is connected with recirculated water water return pipeline；
The 1st effective evaporator, first-class heat exchanger condensation-water drain be connected with 2nd effect evaporator by pipeline, two effect evaporation
Device condensation-water drain is connected with level-one condensate water pot by pipeline, the outlet of level-one condensate water pot upper steam and triple effect evaporator
Steam inlet is connected by pipeline, and level-one condensate water pot condensation-water drain is connected with level-one condensate pump by pipeline, and two
The condensation-water drain of grade heat exchanger is connected with triple effect evaporator by pipeline, triple effect evaporator condensation-water drain and B-grade condensation
Water pot is connected by pipeline, and the outlet of B-grade condensation water pot upper steam is connected with condenser by pipeline, B-grade condensation water
Tank condensation-water drain is connected with B-grade condensation water pump by pipeline, and condenser condensation-water drain and three-level condensate water pot pass through pipe
Road is connected, and three-level condensate water pot condensation-water drain is connected with three-level condensate pump by pipeline；Condensate pump is exported and is changed
Hot device is connected by pipeline.
Further, the 1st effective evaporator steam inlet is connected with jet chimney, an effect crystallizer steam (vapor) outlet point
Be not connected with 2nd effect evaporator and first-class heat exchanger steam inlet by pipeline, two effect crystallizer steam (vapor) outlets respectively with triple effect
Evaporator is connected with secondary heat exchanger steam inlet by pipeline, and triple effect crystallizer steam (vapor) outlet passes through pipeline phase with condenser
Connection.
Further, the effect crystallizer, two effect crystallizers and triple effect crystallizer equipment internal upper part are equipped with cleaning and set
It is standby, it is connected respectively with flushing water pipeline.
Further, the trimethylolethane trimethacrylate imitates evaporating, concentrating and crystallizing systematic difference, it is characterized in that: being applied
In trimethylolethane condensing crystallizing.
The trimethylolethane trimethacrylate imitates evaporating, concentrating and crystallizing systematic difference, the specific steps are as follows:
(1) it vacuumizes: opening condenser circulating water intake and circulating water outlet valve, recirculated water is passed through in condenser, open
Vacuum pump is vacuumized, open 1st effective evaporator, 2nd effect evaporator, triple effect evaporator, first-class heat exchanger, secondary heat exchanger,
Each vacuum valve of condenser, makes system pressure reach target value；
(2) it feeds: being fed by heat exchanger into triple effect evaporator by feed pipe, starting triple effect cycle pump, triple effect discharging
Pump is recycled, and feed liquid is delivered to secondary heat exchanger by triple effect discharging pump, then reaches 2nd effect evaporator, and two effect of starting is followed
Ring pump, two effect discharging pumps are recycled, and feed liquid is delivered to first-class heat exchanger by two effect discharging pumps, then reaches an effect evaporation
Device, one effect circulating pump of starting, an effect discharging pump are recycled, open 1st effective evaporator feed liquid and return triple effect evaporator pipeline valve,
Recycle material in system；
(3) lead to steam: being passed through raw steam into 1st effective evaporator from jet chimney, on feed liquid temperature starts in 1st effective evaporator
It rises, feed liquid starts to evaporate when reaching certain temperature, and the temperature and vacuum pressure for controlling 1st effective evaporator are in target value；One effect crystallization
The secondary steam that evaporation generates in device enters first-class heat exchanger and 2nd effect evaporator by pipeline, respectively to the feed liquid for entering an effect
Preheating and the feed liquid heating recycled in two effects, the temperature and vacuum pressure for controlling 2nd effect evaporator are in target value；Two effect crystallizations
The secondary steam that evaporation generates in device enters secondary heat exchanger and triple effect evaporator by pipeline, respectively to the feed liquid for entering two effects
Preheating and the feed liquid recycled in triple effect heating, the temperature and vacuum pressure for controlling triple effect evaporator are in target value；Triple effect crystallization
The steam tail gas of device enters condenser；
(4) arrange condensed water: the steam condensate (SC) that 1st effective evaporator generates drains into 2nd effect evaporator, the steam in 2nd effect evaporator
Condensed water drains into level-one condensate water pot, and the steam containing incoagulable gas enters triple effect evaporator in level-one condensate water pot, and level-one is cold
Condensed water is discharged through level-one condensate pump in condensate tank, and the steam condensate (SC) that triple effect evaporator generates drains into B-grade condensation water pot,
Steam in B-grade condensation water pot containing incoagulable gas enters condenser, and condensed water is through B-grade condensation water pump in B-grade condensation water pot
It is discharged, the steam condensate (SC) in condenser drains into three-level condensate water pot, is then discharged through three-level condensate pump, three-level condensate pump
The condensed water of discharge is preheated by heat exchanger to material；
(5) it discharges: when magma concentration reaches target value in an effect crystallizer, by an effect discharging pump discharge pipe, by magma
It is sent to subsequent processing.
Further, in system operation, the control of the material temperature of 1st effective evaporator at 83 ~ 85 DEG C, gauge pressure control-
0.047~-0.043MPa；At 68 ~ 70 DEG C, gauge pressure is controlled in -0.072 ~ -0.069MPa the control of 2nd effect evaporator material temperature；Triple effect steams
The control of device material temperature is sent out at 53 ~ 55 DEG C, gauge pressure is controlled in -0.086 ~ -0.085MPa；Raw steam is saturated vapor, and steam pressure is
0.4~0.6MPa；The recirculated water inflow temperature being passed through in condenser is 32 DEG C, and leaving water temperature is 40 DEG C.
Further, magma solid content is controlled in 200 ~ 800 g/L when an effect crystallizer discharging.
Further, system is equipped with automatic flushing device, may be implemented to clean automatically in system-down.
Beneficial effects of the present invention: the present invention by for trimethylolethane production technology and feature be designed and
It researches and develops, develop a set of trimethylolethane trimethacrylate effect evaporating, concentrating and crystallizing system and carries out trimethylolethane using the system and is dense
The method of sheepshank crystalline substance, the invention is by dexterously effectively tying evaporation concentration technique, multiple-effect evaporation technology, evaporative crystallization technique
It closes, substantially reduces the purifying technique route of trimethylolethane.The production of trimethylolethane is carried out using the system, is extracted
Purifying process is simply easily controllable, product yield high quality is good, low energy consumption for steam, production cost is low, has unrivaled excellent
Gesture.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Description of symbols: 1,1st effective evaporator；2,2nd effect evaporator；3, triple effect evaporator；4, an effect crystallizer；5, two
Imitate crystallizer；6, triple effect crystallizer；7, first-class heat exchanger；8, secondary heat exchanger；9, an effect circulating pump；10, an effect discharging pump；
11, two effect circulating pump；12, two effect discharging pump；13, triple effect cycle pumps；14, triple effect discharging pump；15, condenser；16, vacuum pump；
17, level-one condensate water pot；18, B-grade condensation water pot；19, three-level condensate water pot；20, level-one condensate pump；21, B-grade condensation water
Pump；22, three-level condensate pump；23, heat exchanger.
Specific embodiment
The invention will be further described with reference to the accompanying drawing.
Embodiment 1
As shown in Figure 1, a kind of trimethylolethane trimethacrylate imitates evaporating, concentrating and crystallizing system, including 1st effective evaporator 1,2nd effect evaporator
2, triple effect evaporator 3, one imitates crystallizer 4, two and imitates crystallizer 5, triple effect crystallizer 6, first-class heat exchanger 7, secondary heat exchanger 8, one
Imitate the effect effect effect of circulating pump 11, two of discharging pump 10, two of circulating pump 9, one discharging pump 12, triple effect cycle pumps 13, triple effect discharging pump 14, cold
Condenser 15, vacuum pump 16, level-one condensate water pot 17, B-grade condensation water pot 18, three-level condensate water pot 19, level-one condensate pump 20,
B-grade condensation water pump 21, three-level condensate pump 22, heat exchanger 23；
The 1st effective evaporator 1 imitates circulating pump 9 and forms circulation path, 2nd effect evaporator 2 by pipeline and an effect crystallizer 4, one
Circulating pump 11 is imitated by pipeline and two effect crystallizers 5, two and forms circulation path, and triple effect evaporator 3 is crystallized by pipeline and triple effect
Device 6, triple effect cycle pump 13 composition circulation paths, one effect crystallizer 4 by pipeline with one effect discharging pump 10 composition circulation path, two
It imitates crystallizer 5 and circulation path is formed by pipeline and two effect discharging pumps 12, triple effect crystallizer 6 passes through pipeline and triple effect discharging pump 14
Form circulation path；
One effect, 10 discharge port of discharging pump is connected with an effect discharge pipe and 3 feed inlet of triple effect evaporator by pipeline respectively
Logical, two effect 12 discharge ports of discharging pump are connected with 7 feed inlet of first-class heat exchanger by pipeline, 7 discharge port of first-class heat exchanger and one
Effect 1 feed inlet of evaporator is connected by pipeline, and 14 discharge port of triple effect discharging pump passes through pipeline phase with 8 feed inlet of secondary heat exchanger
Connection, 8 discharge port of secondary heat exchanger are connected with 2 feed inlet of 2nd effect evaporator by pipeline, 23 discharge port of heat exchanger and triple effect
3 feed inlet of evaporator is connected by pipeline, and 23 feed inlet of heat exchanger is connected with feed pipe, and condensate pump 22 is exported and changed
Hot device 23 is connected by pipeline；
1 steam inlet of 1st effective evaporator is connected with jet chimney, and effect 4 steam (vapor) outlet of crystallizer is evaporated with two effects respectively
Device 2 is connected with 7 steam inlet of first-class heat exchanger by pipeline, two effect 5 steam (vapor) outlets of crystallizer respectively with triple effect evaporator 3 and
8 steam inlet of secondary heat exchanger is connected by pipeline, and 6 steam (vapor) outlet of triple effect crystallizer is connected with condenser 15 by pipeline
It is logical；
The 1st effective evaporator 1,2nd effect evaporator 2, triple effect evaporator 3 are respectively equipped with vacuum valve and condenser 15 at two and pass through pipe
Road is connected, and first-class heat exchanger 7 and secondary heat exchanger 8 are respectively equipped with vacuum valve at one and are connected with condenser 15 by pipeline,
Condenser 15 is equipped with vacuum valve at two and is connected with vacuum pump 16 by pipeline, and condenser 15 is equipped with circulating water intake, recirculated water
Outlet is connected with recirculated water water inlet and recirculated water water return pipeline respectively；
The 1st effective evaporator 1, first-class heat exchanger 7 condensation-water drain be connected with 2nd effect evaporator 2 by pipeline, two effect steam
Hair 2 condensation-water drain of device is connected with level-one condensate water pot 17 by pipeline, 17 upper steam of level-one condensate water pot outlet and three
Effect 3 steam inlet of evaporator is connected by pipeline, and 17 condensation-water drain of level-one condensate water pot passes through with level-one condensate pump 20
Pipeline is connected, and the condensation-water drain of secondary heat exchanger 8 is connected with triple effect evaporator 3 by pipeline, and triple effect evaporator 3 condenses
Water out is connected with B-grade condensation water pot 18 by pipeline, and the outlet of 18 upper steam of B-grade condensation water pot passes through with condenser 15
Pipeline is connected, and 18 condensation-water drain of B-grade condensation water pot is connected with B-grade condensation water pump 21 by pipeline, and condenser 15 is cold
Condensate outlet is connected with three-level condensate water pot 19 by pipeline, 19 condensation-water drain of three-level condensate water pot and three-level condensate pump
22 are connected by pipeline.
The one effect crystallizer 4, two, which imitates crystallizer 5,6 equipment internal upper part of triple effect crystallizer, cleaning equipment, respectively with punching
Wash water pipeline is connected.
When the invention works: material is entered in triple effect evaporator 3 by feed pipe by heat exchanger 23, in triple effect evaporation
Circulation in device 3, triple effect crystallizer 6, the material in triple effect crystallizer 6 carry out Matter Transfer, material by triple effect discharging pump 14
Discharge pipe is exported by triple effect discharging pump 14 to be delivered to secondary heat exchanger 8 and exchange heat, subsequently into 2nd effect evaporator 2,
2nd effect evaporator 2, two imitates circulation in crystallizer 5, and the material in two effect crystallizers 5 carries out material by two effect discharging pumps 12 and follows
Ring, material are delivered to first-class heat exchanger 7 by two effect discharging pumps 12 outlet discharge pipes and exchange heat, evaporate subsequently into an effect
Device 1 is imitated in crystallizer 4 in 1st effective evaporator 1, one and is recycled, and the material in an effect crystallizer 4 is carried out by an effect discharging pump 10
Matter Transfer, material are recycled in the entire system by effect 10 outlet return pipeline of discharging pump a to triple effect evaporator 3, when
Material one effect crystallizer 4 in magma concentration reach target value when, by one effect 10 discharge pipe of discharging pump, magma is sent to down
One process.
Steam is passed through in 1st effective evaporator 1 from jet chimney and gives material heating, and then tail gas enters 2nd effect evaporator 2, and one
The secondary steam that evaporation generates in effect crystallizer 4 enters first-class heat exchanger 7 and 2nd effect evaporator 2, first-class heat exchanger 7 by pipeline
Interior steam tail gas enters 2nd effect evaporator 2 by pipeline, and the steam condensate (SC) that 2nd effect evaporator 2 generates enters level-one condensed water
Tank 17, the steam containing incoagulable gas enters in triple effect evaporator 3 in level-one condensate water pot 17, and condensed water passes through level-one condensed water
20 discharge of pump, the secondary steam that the two interior evaporations of effect crystallizers 5 generate enter secondary heat exchanger 8 and triple effect evaporator 3 by pipeline,
Steam tail gas in secondary heat exchanger 8 enters triple effect evaporator 3 by pipeline, the steam condensate (SC) that triple effect evaporator 3 generates into
Enter B-grade condensation water pot 18, is discharged by B-grade condensation water pump 21, steam tail gas in triple effect crystallizer 6 and B-grade condensation water pot 18
Into condenser 15, it is discharged into three-level condensate water pot 19 after circulating water, is discharged by three-level condensate pump 22, three-level condensation
The steam condensate (SC) that water pump 22 is discharged is preheated by heat exchanger 23 to material.
Embodiment 2
The method that the trimethylolethane trimethacrylate effect evaporating, concentrating and crystallizing system carries out trimethylolethane condensing crystallizing, step is such as
Under:
(1) it vacuumizes: opening 15 circulating water intake of condenser and circulating water outlet valve, recirculated water is passed through in condenser 15,
It opens vacuum pump 16 to be vacuumized, opens 1st effective evaporator 1,2nd effect evaporator 2, triple effect evaporator 3, first-class heat exchanger 7, two
Grade heat exchanger 8, each vacuum valve of condenser 15, make system pressure reach target value；
(2) it feeds: being fed by heat exchanger 23 into triple effect evaporator 3 by feed pipe, starting triple effect cycle pumps 13, triple effect
Discharging pump 14 is recycled, and feed liquid is delivered to secondary heat exchanger 8 by triple effect discharging pump 14, then reaches 2nd effect evaporator 2,
Two effect circulating pump 11, two of starting is imitated discharging pump 12 and is recycled, and feed liquid is delivered to first-class heat exchanger by two effect discharging pumps 12
7,1st effective evaporator 1 is then reached, one effect circulating pump 9, one of starting is imitated discharging pump 10 and recycled, and 1 material of 1st effective evaporator is opened
Liquid returns 3 pipeline valve of triple effect evaporator, recycles material in system；
(3) lead to steam: being passed through raw steam into 1st effective evaporator 1 from jet chimney, on feed liquid temperature starts in 1st effective evaporator 1
It rises, feed liquid starts to evaporate when reaching certain temperature, and the temperature and vacuum pressure for controlling 1st effective evaporator 1 are in target value；One effect knot
The secondary steam that evaporation generates in brilliant device 4 enters first-class heat exchanger 7 and 2nd effect evaporator 2 by pipeline, gives enter an effect respectively
Feed liquid preheating and two effect in recycle feed liquid heating, control 2nd effect evaporator 2 temperature and vacuum pressure in target value；Two
The secondary steam that evaporation generates in effect crystallizer 5 enters secondary heat exchanger 8 and triple effect evaporator 3 by pipeline, gives enter respectively
The feed liquid preheating of two effects and the feed liquid heating recycled in triple effect, the temperature for controlling triple effect evaporator 3 and vacuum pressure are in target
Value；The steam tail gas of triple effect crystallizer 6 enters condenser 15；
(4) arrange condensed water: the steam condensate (SC) that 1st effective evaporator 1 generates drains into 2nd effect evaporator 2, in 2nd effect evaporator 2
Steam condensate (SC) drains into level-one condensate water pot 17, and the steam containing incoagulable gas enters triple effect evaporator in level-one condensate water pot 17
3, condensed water is discharged through level-one condensate pump 20 in level-one condensate water pot 17, and the steam condensate (SC) that triple effect evaporator 3 generates drains into
B-grade condensation water pot 18, the steam containing incoagulable gas enters condenser 15, B-grade condensation water pot 18 in B-grade condensation water pot 18
Middle condensed water is discharged through B-grade condensation water pump 21, and the steam condensate (SC) in condenser 15 drains into three-level condensate water pot 19, then passes through
Three-level condensate pump 22 is discharged, and the condensed water that three-level condensate pump 22 is discharged is preheated by heat exchanger 23 to material；
(5) it discharges:, will be brilliant by effect 10 discharge pipe of discharging pump when magma concentration reaches target value in an effect crystallizer 4
Slurry is sent to subsequent processing.
In system operation, the control of the material temperature of 1st effective evaporator 1 at 83 ~ 85 DEG C, gauge pressure control -0.047 ~ -
0.043MPa；At 68 ~ 70 DEG C, gauge pressure is controlled in -0.072 ~ -0.069MPa the control of 2 material temperature of 2nd effect evaporator；Triple effect evaporator 3
At 53 ~ 55 DEG C, gauge pressure is controlled in -0.086 ~ -0.085MPa for material temperature control；Raw steam is saturated vapor, steam pressure is 0.4 ~
0.6MPa；The recirculated water inflow temperature being passed through in condenser 15 is 32 DEG C, and leaving water temperature is 40 DEG C.When one effect crystallizer 4 discharges
Magma solid content is controlled in 200 ~ 800 g/L.
The present invention is designed and is researched and developed by the production technology and feature for being directed to trimethylolethane, develops a set of three
Hydroxymethyl ethane three-effect evaporation and condensation crystal system and the method for carrying out trimethylolethane condensing crystallizing using the system, the hair
It is bright by the way that evaporation concentration technique, multiple-effect evaporation technology, evaporative crystallization technique are dexterously effectively combined, substantially reduce three hydroxyl first
The purifying technique route of base ethane.The production of trimethylolethane is carried out using the system, extraction and purification process is simply easy to control
System, product yield high quality is good, low energy consumption for steam, production cost is low, has unrivaled advantage.
Claims (8)
1. trimethylolethane trimethacrylate imitates evaporating, concentrating and crystallizing system, it is characterized in that: including 1st effective evaporator (1), 2nd effect evaporator
(2), triple effect evaporator (3), effect crystallizer (4), two effect crystallizer (5), triple effect crystallizer (6), first-class heat exchanger (7), two
Grade heat exchanger (8), effect circulating pump (9), effect discharging pump (10), two effects circulating pump (11), two effects discharging pump (12), triple effect follow
Ring pumps (13), triple effect discharging pump (14), condenser (15), vacuum pump (16), level-one condensate water pot (17), B-grade condensation water pot
(18), it three-level condensate water pot (19), level-one condensate pump (20), B-grade condensation water pump (21), three-level condensate pump (22) and changes
Hot device (23)；
The 1st effective evaporator (1) forms circulation path by pipeline and effect crystallizer (4), effect circulating pump (9), and two effects are steamed
It sends out device (2) and circulation path is formed by pipeline and two effects crystallizer (5), two effects circulating pump (11), triple effect evaporator (3) passes through pipe
Road and triple effect crystallizer (6), triple effect cycle pump (13) form circulation path；One effect crystallizer (4) passes through pipeline and an effect
Discharging pump (10) forms circulation path, and two effects crystallizer (5) form circulation path, triple effect by pipeline and two effects discharging pump (12)
Crystallizer (6) forms circulation path by pipeline and triple effect discharging pump (14)；
Described effect discharging pump (10) discharge port passes through pipeline phase with an effect discharge pipe and triple effect evaporator (3) feed inlet respectively
Connection, two effect discharging pump (12) discharge ports are connected with first-class heat exchanger (7) feed inlet by pipeline, and first-class heat exchanger (7) goes out
Material mouth is connected with 1st effective evaporator (1) feed inlet by pipeline, triple effect discharging pump (14) discharge port and secondary heat exchanger (8) into
Material mouth is connected by pipeline, and secondary heat exchanger (8) discharge port is connected with 2nd effect evaporator (2) feed inlet by pipeline；It changes
Hot device (23) feed inlet is connected with feed pipe, and heat exchanger (23) discharge port and triple effect evaporator (3) feed inlet pass through pipeline
It is connected；
The 1st effective evaporator (1), 2nd effect evaporator (2) and triple effect evaporator (3) are respectively equipped with vacuum valve and condenser at two
(15) it is connected by pipeline, first-class heat exchanger (7) and secondary heat exchanger (8) are respectively equipped with vacuum valve and condenser (15) at one
It is connected by pipeline, condenser (15) is equipped with vacuum valve at two and is connected with vacuum pump (16) by pipeline, condenser (15)
Equipped with circulating water intake, circulating water outlet, it is connected respectively with recirculated water water inlet and recirculated water water return pipeline；
The 1st effective evaporator (1), first-class heat exchanger (7) condensation-water drain be connected with 2nd effect evaporator (2) by pipeline,
2nd effect evaporator (2) condensation-water drain is connected with level-one condensate water pot (17) by pipeline, level-one condensate water pot (17) top
Steam (vapor) outlet is connected with triple effect evaporator (3) steam inlet by pipeline, level-one condensate water pot (17) condensation-water drain and one
Grade condensate pump (20) is connected by pipeline, and the condensation-water drain of secondary heat exchanger (8) and triple effect evaporator (3) pass through pipeline
It is connected, triple effect evaporator (3) condensation-water drain is connected with B-grade condensation water pot (18) by pipeline, B-grade condensation water pot
(18) upper steam outlet is connected with condenser (15) by pipeline, and B-grade condensation water pot (18) condensation-water drain and second level are cold
Condensate pump (21) is connected by pipeline, and condenser (15) condensation-water drain is connected with three-level condensate water pot (19) by pipeline
Logical, three-level condensate water pot (19) condensation-water drain is connected with three-level condensate pump (22) by pipeline；Condensate pump (22) goes out
Mouth is connected with heat exchanger (23) by pipeline.
2. trimethylolethane trimethacrylate as described in claim 1 imitates evaporating, concentrating and crystallizing system, it is characterized in that: the 1st effective evaporator
(1) steam inlet is connected with jet chimney, and effect crystallizer (4) steam (vapor) outlet is changed with 2nd effect evaporator (2) and level-one respectively
Hot device (7) steam inlet is connected by pipeline, two effect crystallizer (5) steam (vapor) outlets respectively with triple effect evaporator (3) and second level
Heat exchanger (8) steam inlet is connected by pipeline, and triple effect crystallizer (6) steam (vapor) outlet is connected with condenser (15) by pipeline
It is logical.
3. trimethylolethane trimethacrylate as described in claim 1 imitates evaporating, concentrating and crystallizing system, it is characterized in that: the effect crystallizer
(4), two effect crystallizer (5) and triple effect crystallizer (6) equipment internal upper parts are equipped with cleaning equipment, are connected respectively with flushing water pipeline
It is logical.
4. trimethylolethane trimethacrylate described in claim 1 imitates evaporating, concentrating and crystallizing systematic difference, it is characterized in that: being applied to
Trimethylolethane condensing crystallizing.
5. trimethylolethane trimethacrylate as claimed in claim 4 imitates evaporating, concentrating and crystallizing systematic difference, it is characterized in that specific steps
It is as follows:
(1) it vacuumizes: opening condenser (15) circulating water intake and circulating water outlet valve, recirculated water is passed through condenser (15)
In, it opens vacuum pump (16) and is vacuumized, open 1st effective evaporator (1), 2nd effect evaporator (2), triple effect evaporator (3), one
Grade heat exchanger (7), secondary heat exchanger (8), condenser (15) each vacuum valve, make system pressure reach target value；
(2) it feeds: by feed pipe charging into triple effect evaporator (3) by heat exchanger (23), starting triple effect cycle pump
(13), triple effect discharging pump (14) is recycled, and feed liquid is delivered to secondary heat exchanger (8) by triple effect discharging pump (14), then
It reaches 2nd effect evaporator (2), two effect circulating pump (11) of starting, two effects discharging pump (12) are recycled, and feed liquid is imitated out by two
Material pump (12) is delivered to first-class heat exchanger (7), then reaches 1st effective evaporator (1), one effect circulating pump (9) of starting, an effect discharging
Pump (10) is recycled, and is opened 1st effective evaporator (1) feed liquid and is returned triple effect evaporator (3) pipeline valve, follows material in system
Ring；
(3) lead to steam: being passed through raw steam into 1st effective evaporator (1) from jet chimney, 1st effective evaporator (1) interior feed liquid temperature is opened
Begin to rise, feed liquid starts to evaporate when reaching certain temperature, and the temperature and vacuum pressure for controlling 1st effective evaporator (1) are in target value；
The secondary steam that evaporation generates in one effect crystallizer (4) enters first-class heat exchanger (7) and 2nd effect evaporator (2) by pipeline, point
The feed liquid heating that the feed liquid preheating of an effect Gei not entered and recycled in two effects, controls the temperature and vacuum of 2nd effect evaporator (2)
Pressure is in target value；The secondary steam that evaporation generates in two effects crystallizer (5) enters secondary heat exchanger (8) and triple effect by pipeline
Evaporator (3) controls triple effect evaporator (3) respectively to the feed liquid heating for entering the feed liquid preheating of two effects and recycling in triple effect
Temperature and vacuum pressure in target value；The steam tail gas of triple effect crystallizer (6) enters condenser (15)；
(4) arrange condensed water: the steam condensate (SC) that 1st effective evaporator (1) generates drains into 2nd effect evaporator (2), 2nd effect evaporator
(2) steam condensate (SC) in drains into level-one condensate water pot (17), in level-one condensate water pot (17) steam containing incoagulable gas into
Enter triple effect evaporator (3), condensed water is discharged through level-one condensate pump (20) in level-one condensate water pot (17), triple effect evaporator (3)
The steam condensate (SC) of generation drains into B-grade condensation water pot (18), and the steam in B-grade condensation water pot (18) containing incoagulable gas enters
Condenser (15), condensed water is discharged through B-grade condensation water pump (21) in B-grade condensation water pot (18), the steam in condenser (15)
Condensed water drains into three-level condensate water pot (19), is then discharged through three-level condensate pump (22), three-level condensate pump (22) discharge
Condensed water is preheated by heat exchanger (23) to material；
(5) it discharges: when effect crystallizer (4) interior magma concentration reaches target value, imitating discharging pump (10) discharge pipe by one,
Magma is sent to subsequent processing.
6. trimethylolethane trimethacrylate as claimed in claim 5 imitates evaporating, concentrating and crystallizing systematic difference, it is characterized in that: being transported in system
During row, at 83 ~ 85 DEG C, gauge pressure is controlled in -0.047 ~ -0.043MPa for the material temperature control of 1st effective evaporator (1)；Two effect evaporations
At 68 ~ 70 DEG C, gauge pressure is controlled in -0.072 ~ -0.069MPa the control of device (2) material temperature；The control of triple effect evaporator (3) material temperature 53 ~
55 DEG C, gauge pressure is controlled in -0.086 ~ -0.085MPa；Raw steam is saturated vapor, and steam pressure is 0.4 ~ 0.6MPa；It is passed through cold
Recirculated water inflow temperature in condenser (15) is 32 DEG C, and leaving water temperature is 40 DEG C.
7. trimethylolethane trimethacrylate as claimed in claim 5 imitates evaporating, concentrating and crystallizing systematic difference, it is characterized in that: an effect crystallization
The control of magma solid content is in 200 ~ 800 g/L when device (4) discharges.
8. trimethylolethane trimethacrylate as claimed in claim 3 imitates evaporating, concentrating and crystallizing systematic difference, it is characterized in that: system is equipped with
Automatic flushing device may be implemented to clean automatically in system-down.
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| CN201910081595.0A CN109529401A (en) | 2019-01-28 | 2019-01-28 | Trimethylolethane trimethacrylate imitates evaporating, concentrating and crystallizing system and its application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113577800A (en) * | 2021-07-26 | 2021-11-02 | 浙江天联机械有限公司 | Heat pump filtering evaporation system |
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| CN204973107U (en) * | 2015-07-06 | 2016-01-20 | 江苏德邦工程有限公司 | Industrial waste water's evaporation processing apparatus |
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| CN209714348U (en) * | 2019-01-28 | 2019-12-03 | 无锡荣丰生物工程有限公司 | Trimethylolethane trimethacrylate imitates evaporating, concentrating and crystallizing system |
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| CN104261429A (en) * | 2014-10-10 | 2015-01-07 | 山东诺贝丰化学有限公司 | Continuous triple-effect falling-film concentration and vacuum crystallization system and method in potassium nitrate production through double-decomposition method |
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| CN113577800A (en) * | 2021-07-26 | 2021-11-02 | 浙江天联机械有限公司 | Heat pump filtering evaporation system |
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