Methyl pyrrolidone production batching device

Abstract

The utility model discloses a methyl pyrrolidone production batching device, which comprises a feed tank I, a feed tank II and a mixing tank, discharge ports at the bottoms of the feed tank I and the feed tank II are respectively connected with the side wall of the upper end of the mixing tank through a communicating pipe, and a feed port of the mixing tank connected with the communicating pipe is provided with a feed nozzle. A feeding hole is formed in the feeding nozzle; a discharging hole in the bottom of the mixing tank is connected with a feeding hole of the high-pressure reaction kettle; the feeding tank I is connected with a gamma-butyrolactone raw material storage tank through a feeding pipe and a feeding pump I; the feeding tank II is connected with a methylamine solution raw material storage tank through a feeding pipe and a feeding pump II; according to the utility model, two raw materials, namely gamma-butyrolactone and a methylamine solution, are quantitatively added through different containers, then are pressed into the mixing tank to be mixed by matching with the air pump, and then are pressed into the high-pressure reaction kettle to react, so that the raw materials can be pretreated and the reaction speed can be accelerated while accurate batching and reduction of joints of the high-pressure reaction kettle are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to methyl pyrrolidone production device technical field, especially in kind of methyl pyrrolidone production batching device. BACKGROUND

[0002] N-methyl pyrrolidone is an organic matter, chemical formula is C5H9NO, is colorless to light yellow transparent liquid, slightly ammonia smell, with water is mixed with any proportion, dissolves in ether, acetone and ester, halogenated hydrocarbon, aromatic hydrocarbon etc. all kinds of organic solvents, almost with all solvents complete mixture. N-methyl pyrrolidone is excellent solvent, selective strong and stable polar solvent, high-precision electronic, circuit board, lithium battery etc., cleaning agent: deoiling, degreasing, dewaxing, polishing, antirust, paint stripping etc. high-grade paint, ink, pigment has low toxicity, high boiling point, strong dissolving power, not flammable, biodegradable, recyclable, use safety and be suitable for a variety of formula purposes and the like advantages.

[0003] N-methyl pyrrolidone production usually adopts gamma-butyrolactone method, adopts gamma-butyrolactone and methylamine solution as raw material, both adopt certain proportion and add to high-pressure reaction kettle and carry out reaction, reaction process, need control reaction temperature to be above 200 DEG C, pressure reaches several megapascal, because the airtightness requirement of high-pressure reaction kettle is higher, so the feeding opening design and number of high-pressure reaction kettle have certain requirements, the number of feeding opening is too much, and the airtightness is greatly influenced, the utility model provides a kind of methyl pyrrolidone production batching device for the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of methyl pyrrolidone production batching device.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A kind of methyl pyrrolidone production batching device, including feed tank one, feed tank two and mixing tank, the outlet of the bottom of feed tank one and feed tank two is respectively connected with the upper end side wall of mixing tank by a communicating pipe, and the feed inlet of mixing tank and communicating pipe connection is equipped with feed nozzle, the feed nozzle is equipped with feed hole, the outlet of the bottom of feed tank one and feed tank two is installed with lower valve one, the lower outlet of the bottom of mixing tank is connected with the feed inlet of high-pressure reaction kettle, and lower valve two is installed on the lower outlet;Feed tank one is connected with gamma-butyrolactone raw material storage tank by feed pipe and feed pump one, feed tank two is connected with methylamine solution raw material storage tank by feed pipe and feed pump two, the top of feed tank one and feed tank two is respectively connected with the two interfaces of three-way joint by a gas inlet branch pipe, the other joint of three-way joint is connected with gas inlet pipe, and gas pump is installed on the gas inlet pipe;The sidewall of feed tank one and feed tank two is equipped with observation window made of transparent material.

[0007] Further, the feeding holes on the feeding nozzle are multiple, and the multiple feeding holes are uniformly distributed.

[0008] Further, the observation window is provided with scale lines for marking the liquid volume in the cavity, and the amount of the liquid raw material in the feeding tank can be observed through the observation window and the scale lines, thereby facilitating the proportioning of the two raw materials.

[0009] Further, the air inlet pipe is provided with a pressure relief valve, and the pressure in the feeding tank is adjusted through the pressure relief valve, so that the feeding tank can maintain stable high pressure.

[0010] Further, each air inlet branch pipe is provided with an air inlet valve, and the air inlet valve can be used to individually control the pressure in the feeding tank one and the feeding tank two or make the feeding tank one and the feeding tank two form a communicating vessel.

[0011] In summary, the utility model has the following beneficial effects: the utility model realizes precise proportioning, reduces the number of interfaces of the high-pressure reaction kettle, and can pretreat the raw materials and accelerate the reaction speed. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the overall structure schematic view of the utility model;

[0013] Figure 2 is the structure schematic view of the mixing tank of the utility model.

[0014] In the drawing, 1 is feeding tank one, 2 is feeding tank two, 3 is a mixing tank, 4 is a communicating pipe, 5 is feeding pump one, 6 is feeding pump two, 7 is a feeding pipe, 8 is a gas pump, 9 is an air inlet pipe, 10 is a three-way joint, 11 is a pressure relief valve, 12 is an air inlet branch pipe, 13 is an air inlet valve, 14 is an observation window, 15 is a first discharging valve, 16 is a feeding nozzle, 17 is a discharging port, 18 is a second discharging valve, and 19 is a feeding hole. DETAILED DESCRIPTION

[0015] The utility model will be further described in detail in combination with the drawings, and the technical scheme in the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0016] AsFigure 1 and Figure 2 As shown in the figure, a methylpyrrolidone production batching device comprises a first feed tank 1, a second feed tank 2 and a mixing tank 3, the discharge outlets at the bottoms of the first feed tank 1 and the second feed tank 2 are connected to the upper end sidewall of the mixing tank 3 through a communication pipe 4 respectively, and the feed inlet of the mixing tank 3 connected to the communication pipe 4 is provided with a feed nozzle 16, the feed nozzle 16 is provided with a feed hole 19, the discharge outlets at the bottoms of the first feed tank 1 and the second feed tank 2 are installed with a first discharge valve 15, the discharge outlet 17 at the bottom of the mixing tank 3 is connected to the feed inlet of a high-pressure reaction kettle, and the discharge outlet 17 is installed with a second discharge valve 18; the first feed tank 1 is connected to a γ-butyrolactone raw material storage tank through a feed pipe 7 and a first feed pump 5, the second feed tank 2 is connected to a methylamine solution raw material storage tank through a feed pipe 7 and a second feed pump 6, the tops of the first feed tank 1 and the second feed tank 2 are connected to two interfaces of a three-way joint 10 through a gas branch pipe 12 respectively, the other interface of the three-way joint 10 is connected to a gas pipe 9, and the gas pipe 9 is installed with a gas pump 8; the sidewalls of the first feed tank 1 and the second feed tank 2 are both provided with an observation window 14 made of transparent material.

[0017] Further, as shown in the figure, the feed hole 19 on the feed nozzle 16 is a plurality of feed holes 19, the plurality of feed holes 19 are uniformly distributed, and the plurality of feed holes 19 are arranged, under the action of the gas pressure in the feed tank, two kinds of raw material solutions are sprayed out and contact and mix with each other in the mixing tank 3. Figure 2

[0018] Further, the observation window 14 is provided with a scale line for marking the liquid volume in the cavity, the amount of the liquid raw material in the feed tank can be observed through the observation window 14 and the scale line, and the proportioning of the two kinds of raw materials is facilitated.

[0019] Further, the gas pipe 9 is installed with a pressure relief valve 11, the pressure in the feed tank is adjusted through the pressure relief valve 11, and the high pressure in the feed tank is kept stable.

[0020] Further, one gas valve 13 is installed on each gas branch pipe 12, the gas valve 13 is arranged, the pressure in the first feed tank 1 and the second feed tank 2 can be controlled individually, and the first feed tank 1 and the second feed tank 2 can form a communicating vessel.

[0021] ​Working principle: through the feed pump one 5 γ-butyrolactone is pumped into the feed tank one 1, through the feed pump two 6 raw material methylamine solution is pumped into the feed tank two 2, and through the observation window 14 and the scale line above to determine the amount of feeding, after feeding is completed, close the feed pump, then open the air inlet valve 13 and the pressure relief valve 11, start the air pump 8, the air pump 8 makes the pressure in the feed tank one 1 and the feed tank two 2 increase to a certain value, then open the discharge valve one 15, the raw materials in the two feed tanks enter the mixing tank 3 in the opposite spray state through the feed nozzle 16, when all the materials are added into the mixing tank 3, the pressure in the mixing tank 3 also increases (communicate with the feed tank), at this time, open the discharge valve two 18 on the discharge port 17, the mixed raw materials are pressed into the high-pressure reaction kettle by high-pressure gas, after discharging is completed, close the discharge valve two 18, at this time, the high-pressure reaction kettle is a closed reaction device, and subsequent reactions are carried out, and the batching device carries out a new round of batching.

[0022] The embodiment is only an explanation of the utility model, and is not a limitation of the utility model, and those skilled in the art can make modifications without creative contribution according to the needs after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A methylpyrrolidone production dosing device, characterized by: The application relates to a feeding device for a high-pressure reactor, which comprises a first feeding tank (1), a second feeding tank (2) and a mixing tank (3), the bottom discharge outlets of the first feeding tank (1) and the second feeding tank (2) are connected with the upper end side wall of the mixing tank (3) through a communication pipe (4), the feeding inlet of the mixing tank (3) connected with the communication pipe (4) is provided with a feeding nozzle (16), the feeding nozzle (16) is provided with feeding holes (19), the bottom discharge outlets of the first feeding tank (1) and the second feeding tank (2) are provided with a first discharging valve (15), the bottom discharging outlet (17) of the mixing tank (3) is connected with the feeding inlet of a high-pressure reactor, the discharging outlet (17) is provided with a second discharging valve (18), the first feeding tank (1) is connected with a gamma-butyrolactone raw material storage tank through a feeding pipe (7) and a first feeding pump (5), the second feeding tank (2) is connected with a methylamine solution raw material storage tank through a feeding pipe (7) and a second feeding pump (6), the top of the first feeding tank (1) and the second feeding tank (2) is respectively connected with two interfaces of a three-way joint (10) through a gas branch pipe (12), the other interface of the three-way joint (10) is connected with a gas pipe (9), the gas pipe (9) is provided with a gas pump (8), and the side wall of the first feeding tank (1) and the second feeding tank (2) is provided with an observation window (14) made of transparent material.

2. A methylpyrrolidone production dosing device according to claim 1, characterized in that: The feeding nozzle (16) is provided with a plurality of feeding holes (19), and the feeding holes (19) are uniformly distributed.

3. A methylpyrrolidone production dosing device according to claim 1, characterized in that: The observation window (14) is provided with scale lines for marking the liquid volume in the cavity.

4. A methylpyrrolidone production dosing device according to claim 1, characterized in that: The gas pipe (9) is provided with a pressure relief valve (11).

5. A methylpyrrolidone production dosing device according to claim 1, characterized in that: Each gas branch pipe (12) is provided with a gas valve (13).

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