CN211753050U - Caprolactam salt desorption system - Google Patents
Caprolactam salt desorption system Download PDFInfo
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- CN211753050U CN211753050U CN202020122308.4U CN202020122308U CN211753050U CN 211753050 U CN211753050 U CN 211753050U CN 202020122308 U CN202020122308 U CN 202020122308U CN 211753050 U CN211753050 U CN 211753050U
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Abstract
A caprolactam salt removal system comprises a filter, wherein the filter is provided with a feeding pipe and a discharging pipe, the feeding pipe is provided with a feeding valve, the discharging pipe is provided with a discharging valve, the output end of the feeding valve is respectively connected with the output ends of a first valve and a second valve through pipelines, the input end of the first valve is communicated with a water source, and the input end of the second valve is communicated with an inert gas source; the bleeder valve is ejection of compact three-way valve, and one of them output of ejection of compact three-way valve passes through pipeline and product dashpot entry intercommunication, and another output of ejection of compact three-way valve passes through pipeline and salt solution groove entry intercommunication. The system can effectively filter, extract and store caprolactam salt, and can avoid influence on process time due to system shutdown.
Description
Technical Field
The utility model belongs to caprolactam salt filtration technology field, in particular to caprolactam salt desorption system.
Background
In the process of preparing caprolactam salt, a filtering device (also called a removing device) is needed to extract caprolactam melt. The existing removing equipment generally adopts a filter for filtering, the filtering structure in the filter is quartz sand filtering, membrane filtering and the like, but when caprolactam is extracted by the existing filter, the efficiency is not high. Because the caprolactam melt has weak fluidity and high solidification point, even if the pipeline for conveying the caprolactam melt is heated by the heat-tracing pipeline, the filtering effect is not good. Therefore, a caprolactam salt removal system is needed to improve the caprolactam salt removal efficiency.
Disclosure of Invention
In view of the technical problem that the background art exists, the utility model provides a caprolactam salt desorption system, this system can filter effectively to caprolactam salt and draw and store, can avoid the system to park in addition and influenced process time.
In order to solve the technical problem, the utility model discloses following technical scheme has been taken and has been realized:
a caprolactam salt removal system comprises a filter, wherein the filter is provided with a feeding pipe and a discharging pipe, the feeding pipe is provided with a feeding valve, the discharging pipe is provided with a discharging valve, the output end of the feeding valve is respectively connected with the output ends of a first valve and a second valve through pipelines, the input end of the first valve is communicated with a water source, and the input end of the second valve is communicated with an inert gas source; the bleeder valve is ejection of compact three-way valve, and one of them output of ejection of compact three-way valve passes through pipeline and product dashpot entry intercommunication, and another output of ejection of compact three-way valve passes through pipeline and salt solution groove entry intercommunication.
In a preferred scheme, the outer wall of the filter is of a sandwich structure, a cavity formed by the sandwich is a heating cavity, the upper part of the heating cavity is provided with a heat source inlet, and the bottom of the heating cavity is provided with a heat source outlet; the heat source inlet is communicated with a heat source through a pipeline, and the heat source outlet is communicated with a heat source recovery end through a pipeline.
In a preferred scheme, the heat source provides steam for the heating cavity; the heat source recovery end is a cooling tower.
In a preferred scheme, the output end of the feeding valve is connected with the output ends of the first valve and the second valve through a three-way valve for water-gas switching.
In the preferred scheme, the top of the product buffer tank is provided with a breather valve, and the top of the brine tank is provided with an emptying elbow.
In a preferred scheme, the filter is a bag filter, pressure sampling points are respectively arranged at the top and the lower part of the filter, and differential pressure is measured at the two pressure sampling points through a differential pressure transmitter.
In a preferred embodiment, the number of the filters is two.
This patent can reach following beneficial effect:
when adopting one set of filtering and removing system, before carrying out desorption (filtration) to caprolactam salt, throw in the mixture that needs the desorption to the filter earlier, then open the inert gas source, exert pressure to the filter top, the mixture is under the extrusion of pressure, and the caprolactam melt is filtered fast, and ejection of compact three-way valve communicates discharging pipe and product dashpot this moment, and the caprolactam melt is arranged to the product dashpot and is stored. After the filtering process is finished, adding hot water or cold water into the filter to dissolve the filtered impurities (ammonium sulfate and caprolactam polymer); the discharging three-way valve is used for communicating the discharging pipe with the saline water tank, and the dissolved solution is discharged to the saline water tank for storage. This system can filter effectively to caprolactam salt and draw and store, and the heat source can avoid the caprolactam melt to solidify, has influenced the filter effect, and on the other hand when discharge impurity also does benefit to impurity (thiamine and caprolactam polymer) and dissolves with water, has improved the desorption efficiency of this system.
The utility model discloses preferably adopt two sets of filtration desorption systems, when differential pressure transmitter differential pressure value is too big, then switch the B system with the A system, during the operation of B system, change the filter cloth of the filter in the A system. The system avoids the influence of system shutdown on the process time, and further improves the removal efficiency of the system.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic structural diagram of the system of the present invention in embodiment 1;
FIG. 2 is a schematic diagram of the filter of the present invention;
FIG. 3 is a schematic structural diagram of the system of the present invention in embodiment 2;
fig. 4 is a schematic view of the system structure of the present invention in embodiment 3.
In the figure: the system comprises a filter 1, a feeding pipe 101, a discharging pipe 102, a heat source inlet 103, a heat source outlet 104, a feeding valve 21, a discharging three-way valve 22, a first valve 31, a second valve 32, a water source 41, an inert gas source 42, a heat source 43, a heat source recovery end 44, a feeding end 45, a product buffer tank 5, a breather valve 51, a brine tank 6, an emptying elbow 61, a three-way valve 7 for water-gas switching and a differential pressure transmitter 8.
Detailed Description
The preferable scheme is as shown in figure 1, the caprolactam salt removing system comprises a filter 1, wherein the filter 1 is provided with a feeding pipe 101 and a discharging pipe 102, the feeding pipe 101 is provided with a feeding valve 21, and the discharging pipe 102 is provided with a discharging valve; the feeding pipe 101 is used for being communicated with the feeding end 45, the feeding end 45 is used for introducing a mixture containing caprolactam salt, the mixture comprises caprolactam melt with a certain concentration and ammonium sulfate and caprolactam polymers, and heat tracing pipelines are additionally arranged on the feeding pipe 101 and the discharging pipe 102 in the technical scheme; the output end of the feed valve 21 is respectively connected with the output ends of a first valve 31 and a second valve 32 through pipelines, the input end of the first valve 31 is used for being communicated with a water source 41, and the input end of the second valve 32 is used for being communicated with an inert gas source 42; the bleeder valve is ejection of compact three-way valve 22, and one of them output of ejection of compact three-way valve 22 passes through the pipeline and communicates with 5 entry openings in product dashpot, and another output of ejection of compact three-way valve 22 passes through the pipeline and communicates with 6 entry openings in salt solution groove. The inert gas source 42 is a nitrogen source, and the water source 41 can be communicated with hot water or cold water.
Before caprolactam salt is got rid of (filtered), throw in the mixture that needs the desorption to filter 1 earlier, then open inert gas source 42, exert pressure to filter 1 top, the mixture is under the extrusion of pressure, and the caprolactam melt filters fast, and ejection of compact three-way valve 22 communicates discharging pipe 102 and product buffer tank 5 this moment, and the caprolactam melt is arranged to product buffer tank 5 and is stored. After the filtering process is finished, adding hot water or cold water into the filter 1 to dissolve the filtered impurities (ammonium sulfate and caprolactam polymer); the discharging three-way valve 22 communicates the discharging pipe 102 with the brine tank 6, and the dissolved solution is discharged to the brine tank 6 for storage.
Furthermore, the outer wall of the filter 1 is of a sandwich structure, a cavity formed by the sandwich is a heating cavity, the upper part of the heating cavity is provided with a heat source inlet 103, and the bottom of the heating cavity is provided with a heat source outlet 104; the heat source inlet 103 communicates with the heat source 43 through a pipe, and the heat source outlet 104 communicates with the heat source recovery port 44 through a pipe. A heat source 43 provides steam to the heating chamber; the heat recovery end 44 is a cooling tower.
As shown in FIG. 2, a breather valve 51 is provided at the top of the product buffer tank 5, and an emptying elbow 61 is provided at the top of the brine tank 6. The breather valve 51 can avoid the pressure build-up of the product buffer tank 5, and the evacuation elbow 61 also avoids the pressure build-up of the interior of the brine tank 6.
Further, as shown in fig. 2, the filter 1 is a bag filter, and an annular mounting plate is arranged on the inner wall of the filter 1 and used for mounting a filter bag; the top and the lower part of the filter 1 are respectively provided with a pressure sampling point, and the two pressure sampling points measure differential pressure through a differential pressure transmitter 8. When the pressure of the differential pressure transmitter 8 is too large, the filter bag of the filter 1 is proved to be seriously blocked and needs to be replaced in time.
In a preferred embodiment, as shown in fig. 3, the output of the feed valve 21 is connected to the outputs of the first valve 31 and the second valve 32 by a three-way valve 7 for water gas switching. The three-way valve is used for water-gas switching, and mainly reduces the action switching pressure of the first valve 31 and the second valve 32, so that the mechanical jamming phenomenon of the first valve 31 and the second valve 32 is prevented.
A preferred embodiment is shown in fig. 4, where the number of filters 1 is two. The filter 1, the feeding pipe 101, the discharging pipe 102, the heat source inlet 103, the heat source outlet 104, the feeding valve 21, the discharging three-way valve 22, the first valve 31, the second valve 32, the water source 41, the inert gas source 42, the heat source 43, the heat source recovery end 44, the feeding end 45, the product buffer tank 5, the breather valve 51, the brine tank 6, the emptying elbow 61, the three-way valve 7 for water-gas switching and the differential pressure transmitter 8 form a set of filtering and removing system. A hand valve is arranged in front of the heat source inlet 103, an inlet adjusting valve is arranged at the inlet of the brine tank 6, output pipelines are arranged at the bottoms of the brine tank 6 and the product buffer tank 5, and the hand valve and an output pump are arranged on the output pipelines.
The working principle of the whole device is as follows:
the utility model discloses preferably adopt two sets of filtration desorption systems, show with A system and B system respectively, adopt the A system to carry out desorption (filtration) to caprolactam salt earlier, the feed valve 21 of B system this moment, first valve 31 and second valve 32 to and the hand valve before heat source entry 103 is the closed condition. The mixture to be removed is put into the filter 1, the inert gas source 42 is opened, pressure is applied to the top of the filter 1, the caprolactam melt is rapidly filtered under the extrusion action of the pressure, the discharge three-way valve 22 communicates the discharge pipe 102 with the product buffer tank 5, and the caprolactam melt is discharged to the product buffer tank 5 for storage. After the filtering process is finished, adding hot water or cold water into the filter 1 to dissolve the filtered impurities (ammonium sulfate and caprolactam polymer); the discharging three-way valve 22 communicates the discharging pipe 102 with the brine tank 6, and the dissolved solution is discharged to the brine tank 6 for storage. After the impurities are cleaned, the inert gas source 42 is switched on to purge the filter 1.
The differential pressure value of the differential pressure transmitter 8 is preferably selected to measure the differential pressure value in the purging process, and when the differential pressure value of the differential pressure transmitter 8 is too large, the system A is switched to the system B, namely the feed valve 21, the first valve 31 and the second valve 32 of the system A, and the hand valve in front of the heat source inlet 103 are in a closed state. The feed valve 21, the first valve 31 and the second valve 32 of the system B, and the hand valve before the heat source inlet 103 are in the open state. The other operations are the same as the a system. During the operation of the system B, the filter cloth of the filter 1 in the system A is replaced.
Claims (7)
1. The utility model provides a caprolactam salt desorption system, includes filter (1), and filter (1) is equipped with feeding pipe (101) and discharging pipe (102), is equipped with feed valve (21) on feeding pipe (101), is equipped with the bleeder valve on discharging pipe (102), its characterized in that: the output end of the feed valve (21) is respectively connected with the output ends of a first valve (31) and a second valve (32) through pipelines, the input end of the first valve (31) is used for being communicated with a water source (41), and the input end of the second valve (32) is used for being communicated with an inert gas source (42); the bleeder valve is ejection of compact three-way valve (22), and one of them output of ejection of compact three-way valve (22) passes through pipeline and product dashpot (5) entry intercommunication, and another output of ejection of compact three-way valve (22) passes through pipeline and salt solution groove (6) entry intercommunication.
2. The caprolactam salt removal system of claim 1, wherein: the outer wall of the filter (1) is of a sandwich structure, a cavity formed by the sandwich is a heating cavity, the upper part of the heating cavity is provided with a heat source inlet (103), and the bottom of the heating cavity is provided with a heat source outlet (104); the heat source inlet (103) is communicated with the heat source (43) through a pipeline, and the heat source outlet (104) is communicated with the heat source recovery end (44) through a pipeline.
3. The caprolactam salt removal system of claim 2, wherein: a heat source (43) provides steam to the heating chamber; the heat source recovery end (44) is a cooling tower.
4. The caprolactam salt removal system of claim 1, wherein: the output end of the feeding valve (21) is connected with the output ends of the first valve (31) and the second valve (32) through a three-way valve (7) for water and gas switching.
5. The caprolactam salt removal system of claim 1, wherein: the top of the product buffer tank (5) is provided with a breather valve (51), and the top of the brine tank (6) is provided with an emptying elbow (61).
6. The caprolactam salt removal system of claim 1, wherein: the filter (1) is a bag filter, the top and the lower part of the filter (1) are respectively provided with a pressure sampling point, and the two pressure sampling points measure differential pressure through a differential pressure transmitter (8).
7. The caprolactam salt removal system of claim 1, wherein: the number of the filters (1) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020122308.4U CN211753050U (en) | 2020-01-19 | 2020-01-19 | Caprolactam salt desorption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020122308.4U CN211753050U (en) | 2020-01-19 | 2020-01-19 | Caprolactam salt desorption system |
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| Publication Number | Publication Date |
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| CN211753050U true CN211753050U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020122308.4U Active CN211753050U (en) | 2020-01-19 | 2020-01-19 | Caprolactam salt desorption system |
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| CN (1) | CN211753050U (en) |
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- 2020-01-19 CN CN202020122308.4U patent/CN211753050U/en active Active
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