CN203989928U - Single pump double tower vacuum drawn system - Google Patents
Single pump double tower vacuum drawn system Download PDFInfo
- Publication number
- CN203989928U CN203989928U CN201420396871.5U CN201420396871U CN203989928U CN 203989928 U CN203989928 U CN 203989928U CN 201420396871 U CN201420396871 U CN 201420396871U CN 203989928 U CN203989928 U CN 203989928U
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- CN
- China
- Prior art keywords
- vacuum
- catcher
- gas outlet
- air intake
- rectifying column
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- Expired - Fee Related
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The single pump double tower of one of the present utility model vacuum drawn system, comprise dehydrating tower, rectifying column, the first vacuum catcher and the second vacuum catcher, the delivery port of described dehydrating tower is connected with the water inlet pipeline of rectifying column, the gas outlet of described dehydrating tower is connected with the air intake of the first vacuum catcher by pipeline, the gas outlet of described rectifying column is connected with the air intake of the second vacuum catcher by pipeline, wherein, also comprise vavuum pump, the first described vacuum catcher and the gas outlet of the second vacuum catcher are connected respectively the air intake of vavuum pump.The single pump double tower of one of the present utility model vacuum drawn system has that cost is low, utilization rate of equipment and installations is high, resource is distributed rational feature.
Description
Technical field
The utility model relates to a kind of vacuum drawn system, more particularly, relates in particular to a kind of single pump double tower vacuum drawn system.
Background technology
The production process of ortho-aminotoluene mainly comprises reduction operation, refining step and these three operations of recovery process now.Wherein refining step is that the crude product ortho-aminotoluene that reduction is produced when operation flows into dehydrating tower, in dehydrating tower, carrying out vacuum distillation steams moisture from tower top, still liquid flows into rectifying column and carries out vacuum distillation, the ortho-aminotoluene steam that rectifying column tower top is steamed enters return tank after condensation, utilizes reflux pump that finished product is squeezed into finished pot.
As described in Figure 1, in traditional vacuum drawn system, comprise dehydrating tower 10, rectifying column 20, the first vacuum catcher 30, the second vacuum catcher 40, single-motor water ring vacuum pump 60 and Roots-Water-ring vacuum pump assembly 50, the delivery port of dehydrating tower 10 is connected with the water inlet pipeline of rectifying column 20, utilize dehydrating tower 10 to be connected and to vacuumize with single-motor water ring vacuum pump 60 through the first vacuum catcher 30 by pipeline, utilize rectifying column 20 to be connected and to vacuumize with water ring-Roots Vacuum Pump Units 50 through the second vacuum catcher 40 by pipeline.The in the situation that of normal production, the technology controlling and process scope of the top vacuum degree of dehydrating tower 10 top vacuum degree and rectifying column 20 is respectively-75～-95KPa ,-85～-95KPa.Connect Roots-Water-ring vacuum pump assembly 50 of rectifying column often the vacuum of rectifying column 20 interior vacuum systems to be extracted into-more than 99.5KPa, exceeded greatly technology controlling and process area requirement; And the evaporation capacity of dehydrating tower 10 is very little, not very high to the requirement of vacuum, use the round-the-clock continual running of single-motor water ring vacuum pump 60 to cause the waste in process conditions.Therefore, this double pump double tower vacuum drawn pattern has been not suitable for the requirement of production energy-saving, needs improvement of production process that resource is distributed more reasonable.
Utility model content
The purpose of this utility model is to provide a kind of single pump double tower vacuum drawn system, and this kind of vacuum drawn system has that cost is low, utilization rate of equipment and installations is high, resource is distributed rational feature.
The technical solution adopted in the utility model is as follows:
A kind of single pump double tower vacuum drawn system, comprise dehydrating tower, rectifying column, the first vacuum catcher and the second vacuum catcher, the delivery port of described dehydrating tower is connected with the water inlet pipeline of rectifying column, the gas outlet of described dehydrating tower is connected with the air intake of the first vacuum catcher by pipeline, the gas outlet of described rectifying column is connected with the air intake of the second vacuum catcher by pipeline, wherein, also comprise vavuum pump, the first described vacuum catcher and the gas outlet of the second vacuum catcher are connected respectively the air intake of vavuum pump.
Further, between the first described gas outlet of vacuum catcher and the air intake of vavuum pump, be provided with first controlled valve, between the second described gas outlet of vacuum catcher and the air intake of vavuum pump, be provided with a second switch valve.
Further, between the air intake of the gas outlet of described dehydrating tower and the first vacuum catcher, be provided with dehydration condenser, between the air intake of the gas outlet of described rectifying column and the second vacuum catcher, be provided with rectifying condenser.
Compared with prior art, the beneficial effect the utlity model has is:
The utility model is by connecting gas outlet and the gas outlet of the second vacuum catcher that is connected rectifying column of the first vacuum catcher that connects dehydrating tower respectively the air intake of vavuum pump, the first vacuum catcher is connected to vavuum pump with the second vacuum catcher with parallel way, realize a vavuum pump vacuumizes dehydrating tower and rectifying column simultaneously, save the cost of the round-the-clock uninterrupted operation of a vavuum pump needed electric weight and maintenance, the cost of vacuum drawn system is lower, utilization rate of equipment and installations is higher, and it is more reasonable that such resource is distributed.
Brief description of the drawings
Fig. 1 is the structural representation of traditional double tower vacuum drawn system;
Fig. 2 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the technical solution of the utility model is described in further detail, but does not form any restriction of the present utility model.
Consult described in Fig. 2, the single pump double tower of one of the present utility model vacuum drawn system, comprise dehydrating tower 1, rectifying column 2, the first vacuum catcher 3 and the second vacuum catcher 4, the delivery port of described dehydrating tower 1 is connected with the water inlet pipeline of rectifying column 2, the gas outlet of described dehydrating tower 1 is connected with the air intake of the first vacuum catcher 3 by pipeline, the gas outlet of described rectifying column 2 is connected with the air intake of the second vacuum catcher 4 by pipeline, the crude product ortho-aminotoluene of producing from a upper operation enters dehydrating tower 1, in dehydrating tower 1, carrying out vacuum distillation steams moisture from the gas outlet of dehydrating tower 1, enter the first vacuum catcher 3, still liquid enters rectifying column 2, carry out vacuum distillation, the ortho-aminotoluene steam that rectifying column 2 gas outlets are flowed out enters return tank after condensation, finished product is squeezed into finished pot with reflux pump, rectifying column 2 gas outlets also connect the air intake of the second vacuum catcher 4, gas in rectifying column 2 enters in the second vacuum catcher 4.Wherein, also comprise vavuum pump 5, the first described vacuum catcher 3 and the gas outlet of the second vacuum catcher 4 are connected respectively the air intake of vavuum pump 5, and vavuum pump 5 vacuumizes the first vacuum catcher 3 and the second vacuum catcher 4 simultaneously.The single pump double tower of one of the present utility model vacuum drawn system, through production inspection, after vavuum pump 5 vacuumizes the first vacuum catcher 3 and the second vacuum catcher 4, the pressure of the pressure of dehydrating tower 1 tower top and rectifying column 2 tower tops meets " ortho-aminotoluene mill sheet " refining step and specifies the technology controlling and process area requirement of dehydrating tower top vacuum.Like this, the single-motor water ring vacuum pump that tradition vacuumizes for dehydrating tower 1 does not just re-use, save the cost of a vavuum pump needed electric weight of round-the-clock continual operation and maintenance, the cost of vacuum drawn system is lower, and higher for the utilization rate of the vavuum pump 5 of working, it is more reasonable that resource is distributed.
Between the gas outlet of the first described vacuum catcher 3 and the air intake of vavuum pump 5, be provided with first controlled valve 6, between the gas outlet of the second described vacuum catcher 4 and the air intake of vavuum pump 5, be provided with a second switch valve 7, by regulating the first controlled valve 6 can control the air mass flow that flows into the first vacuum catcher 3, by regulating the valve in second switch valve 7 can control the air mass flow that flows into the second vacuum catcher 4.
Between the gas outlet of described dehydrating tower 1 and the air intake of the first vacuum catcher 3, be provided with dehydration condenser 8, between the gas outlet of described rectifying column 2 and the air intake of the second vacuum catcher 4, be provided with rectifying condenser 9, containing ortho-aminotoluene still less, vacuumizing effect is better for the gas so further flowing out in the gas outlet of the gas outlet of cooled dehydrated tower 1 and rectifying column 2.
Described vavuum pump 5 is water ring-Roots Vacuum Pump Units, the effect vacuumizing is best, and the pressure of the pressure of dehydrating tower 1 tower top and rectifying column 2 tower tops meets " ortho-aminotoluene mill sheet " refining step and specify the technology controlling and process area requirement of dehydrating tower top vacuum.
The foregoing is only embodiment of the present utility model, all any amendments of doing within the scope of spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. a single pump double tower vacuum drawn system, comprise dehydrating tower (1), rectifying column (2), the first vacuum catcher (3) and the second vacuum catcher (4), the delivery port of described dehydrating tower (1) is connected with the water inlet pipeline of rectifying column (2), the gas outlet of described dehydrating tower (1) is connected with the air intake of the first vacuum catcher (3) by pipeline, the gas outlet of described rectifying column (2) is connected with the air intake of the second vacuum catcher (4) by pipeline, it is characterized in that, also comprise vavuum pump (5), the first described vacuum catcher (3) and the gas outlet of the second vacuum catcher (4) are connected respectively the air intake of vavuum pump (5).
2. single pump double tower vacuum drawn system according to claim 1, it is characterized in that, between the gas outlet of the first described vacuum catcher (3) and the air intake of vavuum pump (5), be provided with first controlled valve (6), between the gas outlet of the second described vacuum catcher (4) and the air intake of vavuum pump (5), be provided with a second switch valve (7).
3. single pump double tower vacuum drawn system according to claim 1, it is characterized in that, between the gas outlet of described dehydrating tower (1) and the air intake of the first vacuum catcher (3), be provided with dehydration condenser (8), between the gas outlet of described rectifying column (2) and the air intake of the second vacuum catcher (4), be provided with rectifying condenser (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420396871.5U CN203989928U (en) | 2014-07-18 | 2014-07-18 | Single pump double tower vacuum drawn system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420396871.5U CN203989928U (en) | 2014-07-18 | 2014-07-18 | Single pump double tower vacuum drawn system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203989928U true CN203989928U (en) | 2014-12-10 |
Family
ID=52030004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420396871.5U Expired - Fee Related CN203989928U (en) | 2014-07-18 | 2014-07-18 | Single pump double tower vacuum drawn system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203989928U (en) |
-
2014
- 2014-07-18 CN CN201420396871.5U patent/CN203989928U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20160718 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |