CN212758417U - Improve dosing system of NMP synthesis reaction yield - Google Patents
Improve dosing system of NMP synthesis reaction yield Download PDFInfo
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- CN212758417U CN212758417U CN202021014043.2U CN202021014043U CN212758417U CN 212758417 U CN212758417 U CN 212758417U CN 202021014043 U CN202021014043 U CN 202021014043U CN 212758417 U CN212758417 U CN 212758417U
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Abstract
The utility model discloses an improve feed proportioning system of NMP synthetic reaction yield, including first head tank, second head tank, delivery pump, mass flow meter, three-way pipe, pans and reactor, delivery pump and mass flow meter all are equipped with two, are connected and are connected with the three-way pipe through pipeline and first head tank and second head tank respectively, are equipped with feed inlet, bin outlet and pressure release mouth on the pans, and the three-way pipe is connected with the pans feed inlet, and the pans bin outlet passes through the pipeline and is connected with the retort. After the structure is adopted, materials in NMP synthesis can be uniformly mixed, the yield is fully improved in the synthesis reaction, the accuracy and the stability of material proportioning are improved, the consumption of the reaction is reduced, and the safety and the yield in the reaction process are ensured.
Description
Technical Field
The utility model relates to a improve feed proportioning system of NMP synthesis reaction yield.
Background
NMP (N-methyl pyrrolidone) is formed by mixing monomethylamine and gamma-butyrolactone according to a certain proportion, conveying and boosting the mixture by a metering pump, and synthesizing the mixture by a reactor with a certain temperature and pressure, wherein the monomethylamine proportion is excessive when raw materials are proportioned in order to ensure the sufficient reaction of the gamma-butyrolactone in the NMP synthesis process, the molar ratio of the monomethylamine to the gamma-butyrolactone is 1.2:1 in the actual production process, while the traditional production mode adopts the stroke of the metering pump to control the material proportion and the feeding amount, because the domestic metering pump has a large metering error, the proportion is inaccurate, the feed fluctuation of the monomethylamine and lactone is large, the gamma-butyrolactone content in a crude product after the synthesis reaction is high, so that an NMP product is unqualified, or the monomethylamine recovery difficulty is increased due to the serious overdose monomethylamine, improves the consumption of the monomethylamine raw material and the environment-friendly treatment load.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem of low NMP yield in the prior art
The utility model adopts the technical proposal that: the utility model provides an improve dosing system of NMP synthetic reaction yield, including first head tank, the second head tank, the delivery pump, mass flow meter, the three-way pipe, intermediate tank and reactor, delivery pump and mass flow meter all are equipped with two, be connected through pipeline and first head tank and second head tank respectively and be connected with the three-way pipe through the pipeline, be equipped with the feed inlet on the intermediate tank, bin outlet and pressure release mouth, the three-way pipe is connected with the intermediate tank feed inlet, the intermediate tank bin outlet passes through the pipeline and is connected with the retort through the measuring pump.
As a further improvement of the utility model, it still includes nitrogen gas holding vessel, first solenoid valve and second solenoid valve, the interface of three-way pipe divide into the first interface of being connected with the pans, face the second interface of first interface and be close to the third interface of pans for the second interface, one of them delivery pump and mass flowmeter pass through the third interface connection of pipeline and three-way pipe, another delivery pump and mass flowmeter pass through the second interface connection of pipeline and three-way pipe, the pans on be equipped with level gauge and air inlet, first solenoid valve sets up on the pipeline with the second interface connection of three-way pipe, the second solenoid valve sets up on the pipeline that the tundish discharge gate is connected with the retort, level gauge and second solenoid valve signal connection, the nitrogen gas holding vessel pass through the pipeline and be connected with the pans air inlet.
The utility model discloses beneficial effect: after the structure is adopted, the raw materials can be uniformly mixed and fully reacted, the accuracy of material proportioning is improved, the consumption of reaction is reduced, the yield of synthesis reaction is improved, and the safety risk and the processing load of environment-friendly equipment are reduced.
Drawings
Fig. 1 is a schematic view of the present invention.
Fig. 2 is a schematic diagram of the intermediate tank piping connection.
Shown in the figure: first head tank 1, second head tank 2, delivery pump 3, mass flow meter 4, three-way pipe 5, intermediate tank 6, retort 7, feed inlet 8, bin outlet 9, pressure release port 10, nitrogen gas holding vessel 11, first solenoid valve 12, second solenoid valve 13, air inlet 14, pressure relief system 15.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example 1: the utility model provides an improve dosing system of NMP synthetic reaction yield, including first head tank 1, second head tank 2, delivery pump 3, mass flow meter 4, three-way pipe 5, intermediate tank 6 and reactor 7, delivery pump and mass flow meter all are equipped with two, be connected through pipeline and first head tank and second head tank respectively and be connected through pipeline and three-way pipe, be equipped with feed inlet 8 on the intermediate tank, bin outlet 9 and pressure release mouth 10, the three-way pipe is connected with the intermediate tank feed inlet, the intermediate tank bin outlet passes through the pipeline and is connected with the retort.
After the embodiment is adopted, one of the first raw material tank and the second raw material tank is used for storing monomethylamine, the other one of the first raw material tank and the second raw material tank is used for storing gamma-butyrolactone, the mass flow meter is used for metering flow and ensuring the proportion of reaction, and the conveying pump is used for conveying raw materials from the raw material tanks to the intermediate tank. The materials are mixed in the intermediate tank and then are conveyed to the reaction tank. The pressure relief port is provided with a pressure relief valve and connected with the pressure relief system 15, and the pressure relief port is used for discharging the pressure in the intermediate tank and ensuring the safety of the batching system.
Example 2 differs from example 1 in that: the three-way pipe is characterized by further comprising a nitrogen storage tank 11, a first electromagnetic valve 12 and a second electromagnetic valve 13, the connector of the three-way pipe is divided into a first connector connected with the intermediate tank, a second connector facing the first connector and a third connector close to the intermediate tank relative to the second connector, one of the delivery pumps and the mass flow meters is connected with the third connector of the three-way pipe through a pipeline, the other delivery pump and the mass flow meter are connected with the second connector of the three-way pipe through a pipeline, the intermediate tank is provided with a liquid level meter and an air inlet 14, the first electromagnetic valve is arranged on the pipeline connected with the second connector of the three-way pipe, the second electromagnetic valve is arranged on the pipeline connected with a discharge port of the intermediate tank and a reaction tank, the liquid level meter is in signal connection with the second electromagnetic valve, and the nitrogen storage tank is connected with the air inlet of the intermediate.
After the embodiment is adopted, for example, the first raw material tank is used for storing monomethylamine, the second raw material tank is used for storing gamma-butyrolactone, the delivery pump and the mass flow meter which are connected with the third interface of the three-way pipe are connected with the first raw material tank through pipelines (namely connected with the raw material tank for storing monomethylamine), the delivery pump and the mass flow meter which are connected with the second interface of the three-way pipe are connected with the second raw material tank through pipelines (namely connected with the raw material tank for storing gamma-butyrolactone), when the delivery pump is used, the first raw material tank and the second raw material tank can feed materials simultaneously by starting the delivery pump, and the third interface is close to the intermediate tank relative to the second interface, so that the monomethylamine can be added into the intermediate tank firstly, and then the gamma-butyrolactone is added, and the. The nitrogen storage tank is filled with protective gas. The first solenoid valve, used as a double safety valve for controlling the timing of the addition of gamma-butyrolactone, was used in conjunction with example 2 to ensure that monomethylamine could be added first to the tundish. The liquid level meter is used for detecting the liquid level height of the intermediate tank, and when the liquid level of the intermediate tank is low, the liquid level meter gives an alarm, closes the second electromagnetic valve and stops the operation of the delivery pump.
Claims (2)
1. The utility model provides an improve feed proportioning system of NMP synthesis reaction yield which characterized in that: including first head tank, second head tank, delivery pump, mass flow meter, three-way pipe, pans and reactor, delivery pump and mass flow meter all are equipped with two, are connected through pipeline and first head tank and second head tank respectively and are connected through pipeline and three-way pipe, are equipped with feed inlet, bin outlet and pressure release mouth on the pans, and the three-way pipe is connected with the pans feed inlet, and the pans bin outlet passes through the pipeline and is connected with the retort through the measuring pump.
2. The batching system for increasing the reaction yield of the synthesis of NMP according to claim 1, wherein: the three-way pipe is divided into a first interface connected with the intermediate tank, a second interface facing the first interface and a third interface close to the intermediate tank relative to the second interface, one of the delivery pumps and the mass flow meter is connected with the third interface of the three-way pipe through a pipeline, the other delivery pump and the mass flow meter are connected with the second interface of the three-way pipe through a pipeline, the intermediate tank is provided with a liquid level meter and an air inlet, the first electromagnetic valve is arranged on the pipeline connected with the second interface of the three-way pipe, the second electromagnetic valve is arranged on the pipeline connected with the reaction tank at a discharge port of the intermediate tank, the liquid level meter is in signal connection with the second electromagnetic valve, and the nitrogen storage tank is connected with the air inlet of the intermediate tank through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021014043.2U CN212758417U (en) | 2020-06-05 | 2020-06-05 | Improve dosing system of NMP synthesis reaction yield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021014043.2U CN212758417U (en) | 2020-06-05 | 2020-06-05 | Improve dosing system of NMP synthesis reaction yield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212758417U true CN212758417U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021014043.2U Active CN212758417U (en) | 2020-06-05 | 2020-06-05 | Improve dosing system of NMP synthesis reaction yield |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212758417U (en) |
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2020
- 2020-06-05 CN CN202021014043.2U patent/CN212758417U/en active Active
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