CN209438076U - A kind of system of new caprolactam water solution evaporation production caprolactam - Google Patents
A kind of system of new caprolactam water solution evaporation production caprolactam Download PDFInfo
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- CN209438076U CN209438076U CN201822111942.3U CN201822111942U CN209438076U CN 209438076 U CN209438076 U CN 209438076U CN 201822111942 U CN201822111942 U CN 201822111942U CN 209438076 U CN209438076 U CN 209438076U
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Abstract
The utility model discloses a kind of systems of new caprolactam water solution evaporation production caprolactam, and system includes prevapourising unit and quadruple effect fair current evaporation element and heating flash evaporation unit；Prevapourising unit includes own water preevaporator, prevapourising gas phase condenser；Quadruple effect fair current evaporation element includes the effect feed pump for passing sequentially through pipeline connection, an effect evaporation feed heater, an effect reboiler, an effect destilling tower, two effect reboilers and two effect destilling towers etc.；Heating flash evaporation unit includes heating evaporation device etc.；Steam consumption can be substantially reduced using the system of the new caprolactam water solution evaporation production caprolactam of the utility model, it produces one ton of caprolactam and only needs 0.60 ton of steam or so, and multiple-effect evaporation technique in the prior art, it produces one ton of caprolactam and then needs 1.05 tons of steam or so, reduce by 0.45 ton of steam consumption or so, can be saved by producing one ton of caprolactam by 50 tons of recirculated water or so, reduce by 75 yuan/ton of production cost.
Description
Technical field
The utility model relates to caprolactam production technical field, specifically a kind of new caprolactam water solution evaporation
The system for producing caprolactam.
Background technique
Currently, include that rearrangement reaction, organic matter extraction and water are stripped process in preparing process of caprolactam both domestic and external,
Water content is up to 70% or more in the caprolactam water solution of formation, therefore how energy-efficient water removal is caprolactam production
In steps necessary；The dehydration of existing caprolactam water solution mainly uses multiple-effect distillation and membrane separation process, wherein multiple-effect
The evaporation process of each effect is required to a large amount of steam in the way of distillation, and external steam consumption is huge, and the steam evaporated is also
A large amount of recirculated cooling water is needed to be condensed, energy waste is serious；Membrane separation process can save mass energy, but this method is divided
Amount in the water separated out containing caprolactam is higher, cannot recycle again, causes the waste and water pollution of caprolactam, and
And the organic film needed is easily swollen, industrialization is difficult.
At present the heat of 60~95 DEG C of the low-grade hot water from rearrangement reaction liquid cooler in caprolactam production by
It is not high in its temperature, and temperature range amplitude of variation is big, and this residual heat of reaction is difficult to recycle, and the industry passes through at present
Recirculated cooling water is cooling, removes this part reaction heat, therefore causes waste of both heat and recirculated water, how to handle or
Person is urgent problem to be solved in caprolactam production using the hot water of rearrangement reaction liquid cooler.Existing caprolactam dress simultaneously
The own water multiple-effect evaporation unit set is triple effect evaporation technique, and consuming quantity of steam is more, and the multiple-effect that existing apparatus how is transformed is steamed
Hair technique, to reduce steam consumption, and the problem to be solved faced at present.
Utility model content
To solve the above problems, the purpose of the utility model is to provide a kind of new caprolactam water solution evaporations to produce oneself
The system of lactams.
The utility model to achieve the above object, is achieved through the following technical solutions:
A kind of system of new caprolactam water solution evaporation production caprolactam, including prevapourising unit, quadruple effect fair current
Evaporation element and heating flash evaporation unit；Wherein prevapourising unit includes own water preevaporator, prevapourising gas phase condenser；Quadruple effect is suitable
Flow evaporator unit includes the effect feed pump for passing sequentially through pipeline connection, an effect evaporation feed heater, an effect reboiler, an effect
Destilling tower, two effect reboilers, two effect destilling towers, triple effect reboiler, triple effect destilling tower, quadruple effect reboiler, quadruple effect destilling tower, quadruple effect
Evaporate gas phase condenser and four-effect evaporation fixed gas vacuum pump；Heating flash evaporation unit include heating evaporation device, flash separator and
Three-level vapor injection vacuum pumping system；
The hot water outlet of rearrangement reaction liquid cooler is connected with the housing inlet port of own water preevaporator, own water preevaporator
Top gas outlet is connect with prevapourising gas phase condenser, and the gas vent of prevapourising gas phase condenser connects four-effect evaporation gas phase
The liquid-phase outlet of the gas access of condenser, prevapourising gas phase condenser is connect with process condensate liquid bath；
The bottom tube body outlet of own water preevaporator is entered by the tube body of an effect feed pump and an effect evaporation feed heater
Mouth is connected, and the tube body entrance that reboiler is imitated with one in the tube body outlet of an effect evaporation feed heater is connected, and an effect reboiler passes through
Pipeline introduces extraneous steam, and the tube body outlet of an effect reboiler is connect with an effect destilling tower, and an effect destilling tower overhead vapor passes through
Pipeline is connected to two effect reboilers, and an effect destilling tower bottoms material outlet is connect with the material inlet of two effect reboilers；Two effects are again
The condensate outlet for boiling device is connect with the housing inlet port of an effect evaporation feed heater, and the shell of an effect evaporation feed heater goes out
Mouth is connect with process condensate liquid bath；
The gas liquid outlet of two effect reboilers is connect by pipeline with two effect destilling tower material inlets, the bottom of two effect destilling towers
Material outlet is connect with triple effect reboiler material inlet, and two effect destilling tower overhead vapors connect the shell of triple effect reboiler by pipeline
The housing outlets of body entrance, triple effect reboiler condense liquid bath by pipeline connection technology；The gas liquid outlet of triple effect reboiler passes through
Pipeline is connect with triple effect destilling tower material inlet, and bottoms material outlet and the quadruple effect reboiler material inlet of triple effect destilling tower connect
It connects, triple effect destilling tower overhead vapor connects the housing inlet port of quadruple effect reboiler by pipeline, and the housing outlets of quadruple effect reboiler are logical
Piping Joining Technology condenses liquid bath；The gaseous phase outlet of quadruple effect destilling tower connects four-effect evaporation gas phase condenser, four-effect evaporation gas
The gas vent of phase condenser is connect with four-effect evaporation fixed gas vacuum pump, the liquid-phase outlet and work of four-effect evaporation gas phase condenser
Skill condenses liquid bath connection, and the bottoms material outlet of quadruple effect destilling tower passes through four-effect evaporation discharge pump and heating evaporation device material inlet
Connection, the material outlet of heating evaporation device connect with flash separator, the gaseous phase outlet of heating evaporation device and quadruple effect destilling tower
The overhead vapor of centre inlet connection, flash separator is connect by three-level vapor injection vacuum pumping system with quadruple effect destilling tower,
The outlet at bottom of flash separator is connect with caprolactam surge tank.
Preferred system, the hot water outlet of rearrangement reaction liquid cooler also passes through pipeline and the shell of own water preevaporator goes out
Mouth is connected, and the pipeline connects hot water cooler, and hot water cooler is connect by heat-exchanger pump with rearrangement reaction cooler.
Preferred system, own water preevaporator top gas outlet by pipeline also with four-effect evaporation gas phase condenser
Gas access connection.
Preferred system, the own water preevaporator include gas-liquid separator and reboiler, gas-liquid separator and are boiled again
It is connected by the first connecting pipe with the second connecting pipe between device, the gas-liquid separator top position offers gas and goes out
Mouthful, for gas-liquid separation washing after steam flow into prevapourising gas phase condenser, the side of gas-liquid separator open up own water into
Mouthful, for receiving own water, liquidometer is installed on the downside of the own water inlet, the upper end of the liquidometer passes through on liquidometer
Nozzle is communicated with gas-liquid separator, and the lower end of liquidometer is communicated by liquidometer lower nozzle with gas-liquid separator, the liquidometer
Can real-time display go out the separator liquid level in gas-liquid separator, the side of the gas-liquid separator bottom position opens up the first own water
It exports, Liquid level adjusting valve, the flow of the own water outflow gas-liquid separator of controllable adjustable, gas-liquid separation is installed after the first own water out
Own water in device flows into an effect evaporation feed pump via the first own water out, is equipped at the gas-liquid separator bottom centre position
Second own water out, the second own water out are communicated with the first connecting pipe, inside the gas-liquid separator from top to bottom according to
Secondary to be equipped with wire mesh demister, own water distributor and packing section, wire mesh demister is used for except the mist carried secretly in devaporation, own water
Distributor is connected with own water inlet, and packing section is located at the lower part of own water distributor, pacifies in the gas-liquid separator lower inside
Anti-swirl baffle is filled, the anti-swirl baffle is located above the second own water out；
The other end of first connecting pipe connects the own water inlet of reboiler, and the own water inlet of reboiler is located at reboiler
At lower head, the reboiler includes several efficient heat-exchanging pipes of reboiler shell and internal setting, the reboiler shell
Top is upper cover, and the bottom end of reboiler shell is lower head, installs two tube sheets, two pipes up and down inside the reboiler
Reboiler is divided into three chambers by plate, and upper and lower two chambers are connected by efficient heat-exchanging pipe, intermediate cavity for efficient heat-exchanging pipe with
The heat exchange of hot water is equipped with hot water inlet in the side of reboiler upper part of the housing, and the lower part of the reboiler shell other side is equipped with heat
Water out, the hot water come from rearrangement reaction liquid cooler, enter inside reboiler from hot water inlet, change with efficient heat-exchanging pipe
Enter hot water cooler through hot water outlet again after heat, exhaust outlet, the row are offered at the position of reboiler upper part of the housing
Port prevents the heat-transfer effect for influencing reboiler, in reboiler lower part of the housing for discharging the intracorporal inert gas of reboiler shell
It is offered at position and leads leaching mouth, for discharging the hydrops in reboiler when parking, be equipped with again at the upper cover of the reboiler
Device gas liquid outlet is boiled, gas-liquid separator is equipped with corresponding gas-liquid import, the reboiler gas liquid outlet and gas-liquid import
Between connect the second connecting pipe；
When the operation of own water preevaporator, the own water for entering own water evaporation process is flowed into gas-liquid separation by own water inlet
In device, separated gas is passed through after wire mesh demister removes the mist of deentrainment by gas vent pre- in gas-liquid separator
It evaporates in gas phase condenser, the own water in gas-liquid separator passes through the second own water out and the first connecting pipe after packing section
It enters in reboiler, the hot water of the efficient heat-exchanging pipe in the reboiler and the discharge of rearrangement reaction liquid cooler carries out hot friendship
It after changing, then is flowed back in gas-liquid separator by the second connecting pipe, in circulation certain time, after temperature, liquid level reach requirement, evaporation
Qualified own water is continuously sent into an effect evaporation feed pump, the liquid level by Liquid level adjusting valve control by the first own water out
The aperture of regulating valve, keep the separator liquid level in gas-liquid separator be in liquidometer upper orifice and liquidometer lower nozzle position it
Between.
The utility model has the advantage that compared with prior art
Own water preevaporator is used in the system of the new caprolactam water solution evaporation production caprolactam of the utility model
With quadruple effect fair current evaporation element, own water preevaporator using the low hot water of 60~95 DEG C in rearrangement reaction liquid cooler of grade into
The prevapourising of the own water of row realizes recycling present apparatus work to the greatest extent by the effective use to this part tow taste heat
Skill waste heat, while reducing the dosage of recirculated cooling water；In addition to an effect reboiler need to use external steaming in quadruple effect fair current evaporation element
Vapour as heat source outside, two effect reboilers, triple effect reboiler and quadruple effect reboiler use one imitate destilling tower overhead vapor as
The usage amount of external steam and cooling water has also been greatly reduced in heat source, the three-effect downstream evaporation process that compares, and has huge
Economic benefit and environmental benefit.
Steaming can be substantially reduced using the system of the new caprolactam water solution evaporation production caprolactam of the utility model
Vapour consumption, produces one ton of caprolactam and only needs 0.60 ton of steam or so, and multiple-effect evaporation technique in the prior art, production one
Ton caprolactam then needs 1.05 tons of steam or so, reduces by 0.45 ton of steam consumption or so, and producing one ton of caprolactam can
50 tons of recirculated water or so are saved, reduces by 75 yuan/ton of production cost.Producing 200000 tons of caprolactam devices per year every year can save and can expend
With 15,000,000 yuan or more.
Detailed description of the invention
Fig. 1 is the equipment connection schematic diagram of new caprolactam water solution evaporation production caprolactam production system；
Fig. 2 is the structural schematic diagram of own water preevaporator；
Appended drawing reference: 1 gas-liquid separator, 2 reboiler, 3 first 4 second connecting pipe of connecting pipe, 5 gas vent 6
Own 12 liquid of water out of 8 liquidometer upper orifice of own 7 liquidometer of water inlet, 9 liquidometer lower nozzle, 10 separator liquid level 11 first
Position 13 second own 16 packing section of water distributor, 17 anti-swirl baffle 18 of own 14 wire mesh demister of water out 15 of regulating valve is again
Boil 23 tube sheet of own 19 lower head of water inlet of device 20 reboiler shell, 21 efficient heat-exchanging pipe, 22 upper cover, 24 hot water inlet 25
26 exhaust outlet 27 of hot water outlet leads leaching 28 reboiler gas liquid outlet of mouth, 29 gas-liquid import.
Specific embodiment
Own water in the utility model refers to the aqueous solution of caprolactam.
One effect destilling tower, two effect destilling towers, triple effect destilling tower and quadruple effect destilling tower are plate-type wash, feed liquor position
For the inlet of each effect reboiler；Own water preevaporator is filler knockout tower, and in the top feed liquor of packing section.
Four-effect evaporation fixed gas vacuum pump is conventional vacuum pump.
Flash separator is original non-standard equipment of existing apparatus, and with second level and pressure above vessel fabrication qualification
Enterprise can manufacture；Principle is after own water enters flash separator, and with the reduction of pressure, moisture is flashed from caprolactam
Out, and simultaneously the separation of vapor and caprolactam is carried out in the equipment；The equipment is also possible to 201220358300.3 1
Structure disclosed in kind flash separator, is existing equipment.
Three-level vapor injection vacuum pumping system is modular system, and the enterprise for having vacuum ejector manufacture qualification can make
It makes；The equipment is also possible to structure disclosed in 201720013834.5 three-level vapor injection vacuum pumping systems, is existing equipment.
Heating evaporation device is original non-standard equipment of existing apparatus, and with second level and pressure above vessel fabrication qualification
Enterprise can manufacture；Principle is that own water is evaporated in the equipment after steam heats, and then vapor is again and in oneself
Amide separation.The equipment can be structure disclosed in 201320072075.1 Novel heating evaporators, be existing equipment.
The pressure of an effect reboiler is identical as an effect pressure for destilling tower in the application, pressure and two effects of two effect reboilers
The pressure of destilling tower is identical, and the pressure of triple effect reboiler is identical as the pressure of triple effect destilling tower, the pressure of quadruple effect reboiler and four
The pressure for imitating destilling tower is identical.
Below in conjunction with specific embodiment, the utility model will be further described.
Embodiment 1
A kind of system of new caprolactam water solution evaporation production caprolactam, as shown in Figure 1, including prevapourising list
Member, quadruple effect fair current evaporation element and heating flash evaporation unit；Wherein prevapourising unit includes that own water preevaporator, prevapourising gas phase are cold
Condenser；Quadruple effect fair current evaporation element includes the effect feed pump for passing sequentially through pipeline connection, an effect evaporation feed heater, an effect
Reboiler, an effect destilling tower, two effect reboilers, two effect destilling towers, triple effect reboiler, triple effect destilling tower, quadruple effect reboiler, quadruple effect
Destilling tower, four-effect evaporation gas phase condenser and four-effect evaporation fixed gas vacuum pump；Heating flash evaporation unit includes heating evaporation device, dodges
Steam separator and three-level vapor injection vacuum pumping system；
The hot water outlet of rearrangement reaction liquid cooler is connected with the housing inlet port of own water preevaporator, own water preevaporator
Top gas outlet is connect with prevapourising gas phase condenser, and the gas vent of prevapourising gas phase condenser connects four-effect evaporation gas phase
The liquid-phase outlet of the gas access of condenser, prevapourising gas phase condenser is connect with process condensate liquid bath；
The bottom tube body outlet of own water preevaporator is entered by the tube body of an effect feed pump and an effect evaporation feed heater
Mouth is connected, and the tube body entrance that reboiler is imitated with one in the tube body outlet of an effect evaporation feed heater is connected, and an effect reboiler passes through
Pipeline introduces extraneous steam, and the tube body outlet of an effect reboiler is connect with an effect destilling tower, and an effect destilling tower overhead vapor passes through
Pipeline is connected to two effect reboilers, and an effect destilling tower bottoms material outlet is connect with the material inlet of two effect reboilers；Two effects are again
The condensate outlet for boiling device is connect with the housing inlet port of an effect evaporation feed heater, and the shell of an effect evaporation feed heater goes out
Mouth is connect with process condensate liquid bath；
The gas liquid outlet of two effect reboilers is connect by pipeline with two effect destilling tower material inlets, the bottom of two effect destilling towers
Material outlet is connect with triple effect reboiler material inlet, and two effect destilling tower overhead vapors connect the shell of triple effect reboiler by pipeline
The housing outlets of body entrance, triple effect reboiler condense liquid bath by pipeline connection technology；The gas liquid outlet of triple effect reboiler passes through
Pipeline is connect with triple effect destilling tower material inlet, and bottoms material outlet and the quadruple effect reboiler material inlet of triple effect destilling tower connect
It connects, triple effect destilling tower overhead vapor connects the housing inlet port of quadruple effect reboiler by pipeline, and the housing outlets of quadruple effect reboiler are logical
Piping Joining Technology condenses liquid bath；The gaseous phase outlet of quadruple effect destilling tower connects four-effect evaporation gas phase condenser, four-effect evaporation gas
The gas vent of phase condenser is connect with four-effect evaporation fixed gas vacuum pump, the liquid-phase outlet and work of four-effect evaporation gas phase condenser
Skill condenses liquid bath connection, and the bottoms material outlet of quadruple effect destilling tower passes through four-effect evaporation discharge pump and heating evaporation device material inlet
Connection, the material outlet of heating evaporation device are connect with flash separator, gaseous phase outlet and the quadruple effect destilling tower of heating evaporation device
The overhead vapor of centre inlet connection, flash separator is connect by three-level vapor injection vacuum pumping system with quadruple effect destilling tower,
The outlet at bottom of flash separator is connect with caprolactam surge tank.
Embodiment 2
A kind of system of new caprolactam water solution evaporation production caprolactam, the equipment of quadruple effect fair current evaporation element with
Embodiment 1 is identical, the difference is that, the hot water outlet of rearrangement reaction liquid cooler also passes through pipeline and own water preevaporator
Housing outlets are connected, and the pipeline connects hot water cooler, and hot water cooler is connected by heat-exchanger pump and rearrangement reaction cooler
It connects；This design can according to the adjusting of own water preevaporator heat carried out into own water preevaporator hot water amount, or
Person will can directly pass through when the failure of own water preevaporator is overhauled from the whole hot water for resetting reaction solution cooler
Overheat water cooler returns to rearrangement reaction liquid cooler after carrying out cooling, ensures hot water normal circulation.
Embodiment 3
A kind of system of new caprolactam water solution evaporation production caprolactam, the equipment of quadruple effect fair current evaporation element with
Embodiment 1 or embodiment 2 are identical, the difference is that, the outlet of the top gas of own water preevaporator by pipeline also and quadruple effect
Evaporate the gas access connection of gas phase condenser；When system operates normally, own water preevaporator top gas phase steams for this design
Vapour is condensed by prevapourising gas phase condenser, but when prevapourising gas phase condenser breaks down and overhauled,
Own water preevaporator top gas phase steam is directly entered four-effect evaporation gas phase condenser and is condensed, and ensure that this system just
Often operation.
Embodiment 4
As shown in Fig. 2, a kind of own water preevaporator includes gas-liquid separator 1 and reboiler 2, gas-liquid separator 1 and boil again
It is connected by the first connecting pipe 3 with the second connecting pipe 4 between device 2,1 top position of gas-liquid separator offers gas
Body outlet 5 flows into prevapourising gas phase condenser for the steam after gas-liquid separation washing, and the side of gas-liquid separator 1 opens up
Own water inlet 6 is equipped with liquidometer 7 in the downside of the own water inlet 6, the upper end of the liquidometer 7 is logical for receiving own water
It crosses liquidometer upper orifice 8 to communicate with gas-liquid separator 1, the lower end of liquidometer 7 passes through liquidometer lower nozzle 9 and gas-liquid separator 1
Communicate, the liquidometer 7 can real-time display go out the separator liquid level 10 in gas-liquid separator 1, the 1 bottom position of gas-liquid separator
The side set opens up the first own water out 11, installs Liquid level adjusting valve 12, the own water flow of controllable adjustable after the first own water out 11
The flow of gas-liquid separator 1 out, the own water in gas-liquid separator 1 flow into an effect evaporation feed pump via the first own water out 11,
The second own water out 13 is equipped at 1 bottom centre position of gas-liquid separator, the second own water out 13 is connect with first
Pipeline 3 communicates, and wire mesh demister 14, own water distributor 15 are from top to bottom sequentially installed with inside the gas-liquid separator 1 and is filled out
Expect section 16, wire mesh demister 14 is used for except the mist carried secretly in devaporation, and own water distributor 15 is connected with own water inlet 6, fills out
Material section 16 is located at the lower part of own water distributor 15, installs anti-swirl baffle 17 in 1 lower inside of gas-liquid separator, described anti-
It is vortexed baffle 17 and is located at the second own 13 top of water out；
The other end of first connecting pipe 3 connects the own water inlet 18 of reboiler, and the own water inlet 18 of reboiler is located at again
At the lower head 19 for boiling device 2, the reboiler 2 includes several efficient heat-exchanging pipes 21 of reboiler shell 20 and internal setting, institute
The top for stating reboiler shell 20 is upper cover 22, and the bottom end of reboiler shell 20 is lower head 19, inside the reboiler 2
Two tube sheets 23 of installation up and down, two tube sheets 23 divide reboiler 2 for three chambers, and upper and lower two chambers are connected by efficient heat-exchanging pipe 21
It connects, intermediate cavity is used for the heat exchange of efficient heat-exchanging pipe 21 and hot water, is equipped with hot water in the side on 20 top of reboiler shell
Import 24, the lower part of 20 other side of reboiler shell are equipped with hot water outlet 25, and the hot water comes from rearrangement reaction liquid cooler, from
Hot water inlet 24 enters inside reboiler 2, cold into hot water through hot water outlet 25 again after exchanging heat with efficient heat-exchanging pipe 21
But device offers exhaust outlet 26 at 20 upper position of reboiler shell, and the exhaust outlet 26 is for discharging reboiler shell 20
Interior inert gas prevents the heat-transfer effect for influencing reboiler, offers in 20 lower position of reboiler shell and leads leaching mouth 27,
For discharging the hydrops in reboiler 2 when parking, reboiler gas liquid outlet 28 is equipped at the upper cover 22 of the reboiler 2,
Gas-liquid separator 1 is equipped with corresponding gas-liquid import 29, connects between the reboiler gas liquid outlet 28 and gas-liquid import 29
Connect the second connecting pipe 4；
When the operation of own water preevaporator, the own water for entering own water evaporation process is flowed into gas-liquid point by own water inlet 6
From in device 1, separated gas is after wire mesh demister 14 removes the mist of deentrainment by gas vent in gas-liquid separator 1
5 are passed through in prevapourising gas phase condenser, and the own water in gas-liquid separator 1 passes through the second own 13 He of water out after packing section 16
First connecting pipe 3 enters in reboiler 2, the efficient heat-exchanging pipe 21 in the reboiler 2 and rearrangement reaction liquid cooler
It after the hot water of discharge carries out heat exchange, then is flowed back in gas-liquid separator 1 by the second connecting pipe 4, in circulation certain time, temperature
After degree, liquid level reach requirement, qualified own water is evaporated by the first own water out 11, is continuously sent by the control of Liquid level adjusting valve 12
Enter effect evaporation feed pump, the aperture of the Liquid level adjusting valve 12 keeps the separator liquid level 10 in gas-liquid separator 1 to be in liquid
Between position meter upper orifice 8 and 9 position of liquidometer lower nozzle.
Claims (4)
1. a kind of system of new caprolactam water solution evaporation production caprolactam, it is characterised in that: including prevapourising unit,
Quadruple effect fair current evaporation element and heating flash evaporation unit；Wherein prevapourising unit includes own water preevaporator, prevapourising vapor condensation
Device；Quadruple effect fair current evaporation element includes passing sequentially through the one of pipeline connection to imitate feed pump, an effect evaporation feed heater, an effect again
Device, an effect destilling tower, two effect reboilers, two effect destilling towers, triple effect reboiler, triple effect destilling tower, quadruple effect reboiler, quadruple effect is boiled to steam
Evaporate tower, four-effect evaporation gas phase condenser and four-effect evaporation fixed gas vacuum pump；Heating flash evaporation unit includes heating evaporation device, flash distillation
Separator and three-level vapor injection vacuum pumping system；
The hot water outlet of rearrangement reaction liquid cooler is connected with the housing inlet port of own water preevaporator, the top of own water preevaporator
Gas vent is connect with prevapourising gas phase condenser, and the gas vent of prevapourising gas phase condenser connects four-effect evaporation vapor condensation
The liquid-phase outlet of the gas access of device, prevapourising gas phase condenser is connect with process condensate liquid bath；
The tube body entrance phase that the bottom tube body outlet of own water preevaporator passes through an effect feed pump and an effect evaporation feed heater
Even, the tube body outlet of an effect evaporation feed heater is connected with the tube body entrance of an effect reboiler, and an effect reboiler passes through pipeline
Extraneous steam is introduced, the tube body outlet of an effect reboiler is connect with an effect destilling tower, and an effect destilling tower overhead vapor passes through pipeline
Two effect reboilers are connected to, an effect destilling tower bottoms material outlet is connect with the material inlet of two effect reboilers；Two effect reboilers
Condensate outlet with one effect evaporation feed heater housing inlet port connect, one effect evaporation feed heater housing outlets and
The connection of process condensate liquid bath；
The gas liquid outlet of two effect reboilers is connect by pipeline with two effect destilling tower material inlets, the bottoms material of two effect destilling towers
Outlet is connect with triple effect reboiler material inlet, and two effect destilling tower overhead vapors are entered by the shell that pipeline connects triple effect reboiler
Mouthful, the housing outlets of triple effect reboiler condense liquid bath by pipeline connection technology；The gas liquid outlet of triple effect reboiler passes through pipeline
It being connect with triple effect destilling tower material inlet, the bottoms material outlet of triple effect destilling tower is connect with quadruple effect reboiler material inlet, and three
The housing inlet port that destilling tower overhead vapor connects quadruple effect reboiler by pipeline is imitated, the housing outlets of quadruple effect reboiler pass through pipeline
Joining Technology condenses liquid bath；The gaseous phase outlet of quadruple effect destilling tower connects four-effect evaporation gas phase condenser, four-effect evaporation vapor condensation
The gas vent of device is connect with four-effect evaporation fixed gas vacuum pump, the liquid-phase outlet and process condensate of four-effect evaporation gas phase condenser
The bottoms material outlet of liquid bath connection, quadruple effect destilling tower is connect by four-effect evaporation discharge pump with heating evaporation device material inlet,
The material outlet of heating evaporation device is connect with flash separator, the middle part of the gaseous phase outlet of heating evaporation device and quadruple effect destilling tower into
The overhead vapor of mouth connection, flash separator is connect by three-level vapor injection vacuum pumping system with quadruple effect destilling tower, flash distillation point
Outlet at bottom from device is connect with caprolactam surge tank.
2. the system of the new caprolactam water solution evaporation production caprolactam of one kind according to claim 1, feature
Be: the hot water outlet of rearrangement reaction liquid cooler also passes through pipeline and is connected with the housing outlets of own water preevaporator, and should
Pipeline connects hot water cooler, and hot water cooler is connect by heat-exchanger pump with rearrangement reaction cooler.
3. the system of the new caprolactam water solution evaporation production caprolactam of one kind according to claim 1, feature
Be: the top gas outlet of own water preevaporator is also connected with the gas access of four-effect evaporation gas phase condenser by pipeline.
4. the system of the new caprolactam water solution evaporation production caprolactam of one kind according to claim 1, feature
Be: the own water preevaporator includes gas-liquid separator (1) and reboiler (2), gas-liquid separator (1) and reboiler (2)
Between be connected with the second connecting pipe (4) by the first connecting pipe (3), gas-liquid separator (1) top position opens up
There are gas vent (5), flows into prevapourising gas phase condenser for the steam after gas-liquid separation washing, gas-liquid separator (1)
Side opens up own water inlet (6), for receiving own water, is equipped with liquidometer (7) on the downside of the own water inlet (6), described
The upper end of liquidometer (7) is communicated by liquidometer upper orifice (8) with gas-liquid separator (1), and the lower end of liquidometer (7) passes through liquid level
Meter lower nozzle (9) communicated with gas-liquid separator (1), the liquidometer (7) can real-time display go out the separation in gas-liquid separator (1)
Device liquid level (10), the side of gas-liquid separator (1) bottom position open up the first own water out (11), the first own water out
(11) Liquid level adjusting valve (12) are installed afterwards, the flow of own water outflow gas-liquid separator (1) of controllable adjustable, gas-liquid separator (1)
Interior own water flows into an effect evaporation feed pump, gas-liquid separator (1) bottom centre position via the first own water out (11)
Place is equipped with the second own water out (13), and the second own water out (13) communicates with the first connecting pipe (3), the gas-liquid separation
Wire mesh demister (14), own water distributor (15) and packing section (16), silk screen foam removal are from top to bottom sequentially installed with inside device (1)
Device (14) is used for except the mist carried secretly in devaporation, and own water distributor (15) is connected with own water inlet (6), packing section (16) position
In the lower part of own water distributor (15), anti-swirl baffle (17) are installed in the gas-liquid separator (1) lower inside, the anti-whirlpool
Baffle (17) are flowed to be located above the second own water out (13)；
The other end of first connecting pipe (3) connects the own water inlet of reboiler (18), and the own water inlet of reboiler (18) is located at
At the lower head (19) of reboiler (2), the reboiler (2) includes that reboiler shell (20) and internal the several of setting efficiently change
Heat pipe (21), the top of the reboiler shell (20) are upper cover (22), and the bottom end of reboiler shell (20) is lower head
(19), reboiler (2) is divided into three in the reboiler (2) internal two tube sheets (23) of installation, two tube sheets (23) up and down
Chamber, upper and lower two chambers are connected by efficient heat-exchanging pipe (21), and heat of the intermediate cavity for efficient heat-exchanging pipe (21) and hot water is handed over
It changes, is equipped with hot water inlet (24) in the side on reboiler shell (20) top, the lower part of reboiler shell (20) other side is equipped with
Hot water outlet (25), the hot water come from rearrangement reaction liquid cooler, enter reboiler (2) inside from hot water inlet (24),
Enter hot water cooler through hot water outlet (25) again with after efficient heat-exchanging pipe (21) heat exchange, on reboiler shell (20) top
It is offered at position exhaust outlet (26), the exhaust outlet (26) is used to discharge the inert gas in reboiler shell (20), prevents
The heat-transfer effect for influencing reboiler offers in reboiler shell (20) lower position and leads leaching mouth (27), for arranging when parking
The hydrops in reboiler (2) is put, is equipped with reboiler gas liquid outlet (28) at the upper cover (22) of the reboiler (2), gas-liquid
Separator (1) is equipped with corresponding gas-liquid import (29), the reboiler gas liquid outlet (28) and gas-liquid import (29) it
Between connect the second connecting pipe (4)；
When the operation of own water preevaporator, the own water for entering own water evaporation process is flowed into gas-liquid separation by own water inlet (6)
In device (1), separated gas is after wire mesh demister (14) remove the mist of deentrainment by gas in gas-liquid separator (1)
Outlet (5) be passed through in prevapourising gas phase condenser, the own water in gas-liquid separator (1) by packing section (16) after pass through second oneself
Water out (13) and the first connecting pipe (3) enter in reboiler (2), the efficient heat-exchanging pipe in the reboiler (2)
(21) after carrying out heat exchange with the hot water of rearrangement reaction liquid cooler discharge, then gas-liquid separation flowed back to by the second connecting pipe (4)
In device (1), in circulation certain time, after temperature, liquid level reach requirement, evaporates qualified own water and pass through the first own water out
(11), an effect evaporation feed pump is continuously sent by Liquid level adjusting valve (12) control, the aperture of the Liquid level adjusting valve (12) is protected
Hold the separator liquid level (10) in gas-liquid separator (1) be in liquidometer upper orifice (8) and liquidometer lower nozzle (9) position it
Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822111942.3U CN209438076U (en) | 2018-12-17 | 2018-12-17 | A kind of system of new caprolactam water solution evaporation production caprolactam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822111942.3U CN209438076U (en) | 2018-12-17 | 2018-12-17 | A kind of system of new caprolactam water solution evaporation production caprolactam |
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| Publication Number | Publication Date |
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| CN209438076U true CN209438076U (en) | 2019-09-27 |
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| CN201822111942.3U Active CN209438076U (en) | 2018-12-17 | 2018-12-17 | A kind of system of new caprolactam water solution evaporation production caprolactam |
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| Country | Link |
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| CN (1) | CN209438076U (en) |
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2018
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