CN205613066U - A MVR vapor recompression equipment that is used for 6 polymerization monomers of nylon to retrieve - Google Patents
A MVR vapor recompression equipment that is used for 6 polymerization monomers of nylon to retrieve Download PDFInfo
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- CN205613066U CN205613066U CN201620308496.3U CN201620308496U CN205613066U CN 205613066 U CN205613066 U CN 205613066U CN 201620308496 U CN201620308496 U CN 201620308496U CN 205613066 U CN205613066 U CN 205613066U
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Abstract
The utility model provides a MVR vapor recompression equipment that is used for 6 polymerization monomers of nylon to retrieve, including primary heater, secondary heater, third heater, with the first separator of primary heater complex, with secondary heater complex second separator, with third heater complex third separator, pre -heater to and the pipeline and the pump of each device of connection, still include a mechanical vapor recompression ware, this equipment energy consumption is low, the running cost is low, the environmental protection reduces discharging, it is convenient to maintain.
Description
Technical field
This utility model relates to a kind of evaporation separation equipment.
Background technology
Nylon 6 (PA6) is mainly produced by the polymerization of caprolactam, in the production technology of domestic and international PA6 polymerization, all contains, in most production technologies, the step for of extracting with water, and extract is for containing about 10% caprolactam monomer and oligomer.
At present, MONOMER RECOVERY traditional in industry mostly uses triple effect evaporation technique to realize, the extraction water and the oligomer that i.e. contain about 10% monomer enter continuous heater through filter, major part water is got rid of at one three grades triple effect recirculation heaters, every one-level falls the moisture of about 1/4th through evaporative removal, first order evaporation is used for heating second level heater by middle pressure evaporation heating, evaporant out, has two grades of evaporants to be out used to heat the third level successively.Clean gas scrubbing tower from afterbody steam out, to save caprolactam loss, steam condensate is then sent in fresh water (FW) basin reuse to extraction workshop section, and concentrated extract (70～80%) enters in the concentrated solution basin heated.In whole triple effect evaporation system, all of thermal source is provided by middle pressure evaporation, and according to statistics, MONOMER RECOVERY often evaporates 1 ton of water, and the consumption of its steam is about 0.5 ton.Producing with substantial amounts of steam condensate (SC), the process of this partial condensation water brings inevitably impact necessarily to the economic benefit of enterprise simultaneously.
In multi-effect evaporating device, initial steam heating the first effect the steam produced does not enters condenser, but as the second effect add thermal medium be able to again with.So initial steam can be consumed and effectively reduce about 50%.Reuse this principle, initial steam consumption can be reduced further.The maximum heating temperature of the first effect defines total temperature difference with the minimum boiling point temperature of last effect, is distributed in each effect.As a result, often the effect temperature difference increases with effect number and reduces.So the evaporation rate for reaching to specify must increase heating surface (area) (HS.Preresearch estimates shows, for the effective heating surface (area) (HS of institute with the effect proportional increase of number, while so steam saving gradually decreases, investment cost dramatically increases.
For must, prior art has the disadvantages that energy consumption is high, cost of labor is high；Bulky, maintenance cost is high；Consumption quantity of steam is big, seriously polluted；Destructible product structure, easy fouling, perishable.
Utility model content
The purpose of this utility model is to provide for that a kind of energy consumption is low, operating cost is low, environmental emission reduction, nylon 6/poly easy to maintenance close the MVR vapor recompression equipment of MONOMER RECOVERY.
The MVR vapor recompression equipment closing MONOMER RECOVERY for nylon 6/poly that this utility model is provided, its technical scheme is:
Including primary heater, secondary heater, the 3rd heater, the second separator that the first separator coordinated with primary heater coordinates with secondary heater and the 3rd separator that the 3rd heater coordinates, preheater, and connect pipeline and the pump of each device, it is characterized in that, also include a function of mechanical steam recompression device；
Further, described primary heater material inlet is connected with the material outlet of preheater, primary heater material outlet is connected to the first separator, and the material outlet of the first separator connects the material inlet of primary heater material inlet and secondary heater respectively；The material outlet of secondary heater material inlet and the first separator is connected, and secondary heater material outlet is connected to the second separator, and the material outlet of the second separator connects secondary heater material inlet and the material inlet of the 3rd heater respectively；The material outlet of the 3rd heating implements material entrance and the second separator is connected, and the 3rd heating implements material outlet is connected to the 3rd separator, and the material outlet of the 3rd separator connects the 3rd heating implements material entrance and concentrated solution collection system respectively；
The steam (vapor) outlet of described first separator and the 3rd separator is connected to the steam inlet of function of mechanical steam recompression device, the steam (vapor) outlet of function of mechanical steam recompression device is connected to secondary heater and the steam inlet of the 3rd heater, and the steam inlet of primary heater is connected to the steam (vapor) outlet of the second separator；The steam (vapor) outlet of primary heater secondary heater and the 3rd heater is connected to the thermal source inlet of preheater.
Further, described function of mechanical steam recompression device is frequency-changeable compressor.
The technical solution of the utility model has a following notable beneficial effect:
1. compression ratio is high, and the thermal efficiency is high, saves the energy, and specific energy consumption is low, and the energy consumption of one clear water of evaporation is about 1/6 to the 1/5 of conventional heater, and operating cost is substantially reduced.
2. low operating cost: owing to energy consumption is low, corresponding whole heater operating cost is greatly reduced, only 1st/to two/3rds of conventional heater.
3. compressor uses VFC, in actual use, can automatically wake up with a start VFC for on-the-spot situation.
4. being again the condenser of indirect steam simultaneously due to heater, so not only need not other condenser, and without recirculated cooling water, saving the expense of public work.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model equipment.
Detailed description of the invention
In embodiment as shown in Figure 1:
The MVR vapor recompression equipment of MONOMER RECOVERY is closed for nylon 6/poly, including primary heater 1, secondary heater the 2, the 3rd heater 3, the 3rd separator 6 that the second separator 5 that the first separator 4 coordinated with primary heater 1 coordinates with secondary heater 2 coordinates with the 3rd heater 3, preheater 7, and connect pipeline and the pump of each device, also include a function of mechanical steam recompression device 8 and connect the pipeline of each device and the pump of power is provided；After material 10 is preheated by preheater 7, enter primary heater 1 to heat, subsequently into the first separator 4, steam enters function of mechanical steam recompression device 8, liquid phase part passes back into primary heater, it is partially into secondary heater 2 and continues heating, subsequently into the second separator 5, in second separator 5, steam heats primary heater 1 as thermal source, liquid phase part passes back into secondary heater 2, it is partially into the 3rd heater 3 and continues heating, subsequently into the 3rd separator 6, steam in 3rd separator 6 enters function of mechanical steam recompression device 8, liquid phase part passes back into the 3rd heater 3, portion collection, obtain concentrated solution 11；Steam after function of mechanical steam recompression device 8 pressurized, heated is as thermal source heating secondary heater 2 and the 3rd heater 3；After primary heater 1, secondary heater 2 and the 3rd heater 3 are heated by vapours, being condensed into water, material is preheated in preheater 7 by condensed water 9 as thermal source.
Above-described embodiment only for technology of the present utility model design and feature are described, its object is to allow person skilled in the art will appreciate that content of the present utility model and to implement according to this, can not limit protection domain of the present utility model with this.All equivalence changes made according to this utility model spirit or modification, all should contain within protection domain of the present utility model.
Claims (3)
1. the MVR vapor recompression equipment of MONOMER RECOVERY is closed for nylon 6/poly, including primary heater (1), secondary heater (2), the 3rd heater (3), the 3rd separator (6) that the second separator (5) that the first separator (4) coordinated with primary heater (1) coordinates with secondary heater (2) coordinates with the 3rd heater (3), preheater (7), and connect pipeline and the pump of each device, it is characterized in that, also include a function of mechanical steam recompression device (8).
The MVR vapor recompression equipment closing MONOMER RECOVERY for nylon 6/poly the most according to claim 1, it is characterised in that:
Described primary heater (1) material inlet is connected with the material outlet of preheater (7), primary heater (1) material outlet is connected to the first separator (4), and the material outlet of the first separator (4) connects primary heater (1) material inlet and the material inlet of secondary heater (2) respectively；The material outlet of secondary heater (2) material inlet and the first separator (4) is connected, secondary heater (2) material outlet is connected to the second separator (5), and the material outlet of the second separator (5) connects secondary heater (2) material inlet and the material inlet of the 3rd heater (3) respectively；The material outlet of the 3rd heater (3) material inlet and the second separator (5) is connected, 3rd heater (3) material outlet is connected to the 3rd separator (6), and the material outlet of the 3rd separator (6) connects the 3rd heater (3) material inlet and concentrated solution collection system respectively；
The steam (vapor) outlet of described first separator (4) and the 3rd separator (6) is connected to the steam inlet of function of mechanical steam recompression device (8), the steam (vapor) outlet of function of mechanical steam recompression device (8) is connected to secondary heater (2) and the steam inlet of the 3rd heater (3), and the steam inlet of primary heater (1) is connected to the steam (vapor) outlet of the second separator (5)；The steam (vapor) outlet of primary heater (1) secondary heater (2) and the 3rd heater (3) is connected to the thermal source inlet of preheater (7).
The MVR vapor recompression equipment closing MONOMER RECOVERY for nylon 6/poly the most according to claim 1, it is characterised in that: described function of mechanical steam recompression device (8) is frequency-changeable compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620308496.3U CN205613066U (en) | 2016-04-13 | 2016-04-13 | A MVR vapor recompression equipment that is used for 6 polymerization monomers of nylon to retrieve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620308496.3U CN205613066U (en) | 2016-04-13 | 2016-04-13 | A MVR vapor recompression equipment that is used for 6 polymerization monomers of nylon to retrieve |
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| Publication Number | Publication Date |
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| CN205613066U true CN205613066U (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620308496.3U Active CN205613066U (en) | 2016-04-13 | 2016-04-13 | A MVR vapor recompression equipment that is used for 6 polymerization monomers of nylon to retrieve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107050902A (en) * | 2017-02-23 | 2017-08-18 | 上海轻叶能源股份有限公司 | The energy-saving steam system and remodeling method of multiple-effect falling film evaporator |
-
2016
- 2016-04-13 CN CN201620308496.3U patent/CN205613066U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107050902A (en) * | 2017-02-23 | 2017-08-18 | 上海轻叶能源股份有限公司 | The energy-saving steam system and remodeling method of multiple-effect falling film evaporator |
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