CN214792107U - Cooling device for ensuring concentration of monomethylamine aqueous solution - Google Patents
Cooling device for ensuring concentration of monomethylamine aqueous solution Download PDFInfo
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- CN214792107U CN214792107U CN202120973402.5U CN202120973402U CN214792107U CN 214792107 U CN214792107 U CN 214792107U CN 202120973402 U CN202120973402 U CN 202120973402U CN 214792107 U CN214792107 U CN 214792107U
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- monomethylamine
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Abstract
The utility model discloses a guarantee cooling device of monomethylamine aqueous solution concentration, including monomethylamine knockout tower and monomethylamine absorption tower, condenser and cooler have connected gradually through the overflow pipe between monomethylamine knockout tower and the monomethylamine absorption tower, the condenser is provided with comdenstion water import and comdenstion water export, the condenser adopts normal atmospheric temperature water to condense, the cooler is provided with cooling water import and cooling water export, the cooler adopts salt cold water to cool off. The utility model is provided with the condenser and the cooler to carry out double cooling on the mixed gas of the monomethylamine and the water vapor, and the temperature of the monomethylamine aqueous solution can be reduced to about 20 ℃ after cooling, thereby greatly improving the concentration of the monomethylamine aqueous solution absorbed by the monomethylamine absorption tower and being capable of being improved to more than 40 percent, and avoiding the environmental pollution caused by incomplete absorption of the subsequent monomethylamine; the material consumption of the reaction system is reduced, and the cost is saved.
Description
Technical Field
The utility model relates to a chemistry field, specific cooling device who guarantees monomethylamine aqueous solution concentration that says so.
Background
The production process of synthesizing N-methyl pyrrolidone with aqueous solution of monomethylamine and gamma-butyrolactone without catalyst includes the reaction of gamma-butyrolactone completely and excessive monomethylamine as reaction material. In order to reduce material consumption and avoid environmental pollution, excessive monomethylamine needs to be absorbed by water for recycling. Limited by the design of a methylamine absorption tower, the concentration of the absorbed monomethylamine aqueous solution can only reach about 30 percent and is difficult to reach 40 percent. The inventors have devised the present cooling device for this purpose.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects existing in the prior art and provide a cooling device for ensuring the concentration of monomethylamine aqueous solution.
For solving the technical problem, the utility model discloses a guarantee cooling device of monomethylamine aqueous solution concentration, including monomethylamine knockout tower and monomethylamine absorption tower, condenser and cooler have connected gradually through the overflow pipe between monomethylamine knockout tower and the monomethylamine absorption tower, the condenser is provided with comdenstion water import and comdenstion water export, the condenser adopts normal atmospheric temperature water to condense, the cooler is provided with cooling water import and cooling water export, the cooler adopts salt cold water to cool off.
Furthermore, the top of the monomethylamine separation tower is connected with an inlet of a condenser through an overflow pipe, a first outlet of the condenser is connected with an inlet of a cooler through an overflow pipe, and an outlet of the cooler is connected with the monomethylamine absorption tower through an overflow pipe.
Further, a second outlet of the condenser is arranged at the lower end of the condenser, the second outlet of the condenser is connected with a water suction pump through an overflow pipe, and the water suction pump is connected with a methylamine separation tower through the overflow pipe.
Further, the temperature of the mixed gas of the monomethylamine and the water vapor is about 50 ℃ after the mixed gas is condensed by a condenser.
Further, the temperature of the mixed gas of the monomethylamine and the water vapor is about 20 ℃ after the mixed gas is cooled by a cooler.
To sum up, the utility model discloses following beneficial effect has:
the utility model is provided with the condenser and the cooler to carry out double cooling on the mixed gas of the monomethylamine and the water vapor, and the temperature of the monomethylamine aqueous solution can be reduced to about 20 ℃ after cooling, thereby greatly improving the concentration of the monomethylamine aqueous solution absorbed by the monomethylamine absorption tower and being capable of being improved to more than 40 percent, and avoiding the environmental pollution caused by incomplete absorption of the subsequent monomethylamine; the material consumption of the reaction system is reduced, and the cost is saved.
Drawings
The invention will be described in further detail with reference to the following drawings and embodiments:
fig. 1 is a schematic structural diagram of a cooling device for ensuring the concentration of monomethylamine aqueous solution according to the present invention;
FIG. 2 is a schematic diagram of bubble point temperature corresponding to concentration of aqueous monomethylamine solution at normal pressure.
In the figure: 1-methylamine separation tower, 2 condenser, 201 condensed water inlet, 202 condensed water outlet, 203 condenser inlet, 204 condenser first outlet, 205 condenser second outlet, 3 water suction pump, 4 cooler, 401 cooling water inlet, 402 cooling water outlet, 403 cooler inlet, 404 cooler outlet, 5-methylamine absorption tower and 6 overflow pipe.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The invention will be further described with reference to the accompanying drawings:
referring to the attached figure 1, a cooling device for ensuring the concentration of a monomethylamine aqueous solution comprises a monomethylamine separation tower 1 and a monomethylamine absorption tower 5, wherein a condenser 2 and a cooler 4 are sequentially connected between the monomethylamine separation tower 1 and the monomethylamine absorption tower 5 through an overflow pipe 6, the top of the monomethylamine separation tower 1 is connected with a condenser inlet 203 through the overflow pipe 6, a first outlet 204 of the condenser is connected with a cooler inlet 403 through the overflow pipe 6, and a cooler outlet 404 is connected with the monomethylamine absorption tower 5 through the overflow pipe 6; condensed water condensed by the condenser 2 is discharged into the monomethylamine separation tower 1 through the condenser second outlet 205 and the overflow pipe 6 by the water suction pump 3, the condenser 2 is provided with a condensed water inlet 201 and a condensed water outlet 202, the condenser 2 is condensed by normal-temperature water, the cooler 4 is provided with a cooling water inlet 401 and a cooling water outlet 402, the cooler 4 is cooled by salt cold water, in the embodiment, through a test, when the water inlet temperature of the condensed water inlet 201 is 30 ℃, the water outlet temperature of the condensed water outlet 202 is about 40 ℃, and the temperature of condensed monomethylamine aqueous solution is about 50 ℃; when the cooling water inlet 401 inlet water temperature was 10 ℃, the cooling water outlet 402 outlet water temperature was about 15 ℃, and the aqueous solution temperature of monomethylamine after the cooling was about 20 ℃, according to the bubble point temperature schematic diagram that aqueous solution concentration of monomethylamine corresponds under the ordinary pressure of fig. 2, when aqueous solution temperature of monomethylamine was 24.8 ℃, the absorptive aqueous solution concentration of monomethylamine absorption tower was 40%, consequently the utility model discloses a when aqueous solution temperature of monomethylamine after the cooling device cooling was about 20 ℃, the absorptive aqueous solution concentration of monomethylamine absorption tower exceeded 40%. The utility model avoids the environmental pollution caused by incomplete absorption of the subsequent methylamine; the material consumption of the reaction system is reduced, and the cost is saved.
To sum up, the present invention is not limited to the above-mentioned specific embodiments. Those skilled in the art may make numerous changes and modifications without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be subject to the claims of the present invention.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Claims (5)
1. The utility model provides a guarantee cooling device of monomethylamine aqueous solution concentration, includes monomethylamine knockout tower (1) and monomethylamine absorption tower (5), its characterized in that, connect gradually condenser (2) and cooler (4) through overflow pipe (6) between monomethylamine knockout tower (1) and monomethylamine absorption tower (5), condenser (2) are provided with comdenstion water import (201) and comdenstion water export (202), condenser (2) adopt normal atmospheric temperature water to condense, cooler (4) are provided with cooling water import (401) and cooling water export (402), cooler (4) adopt salt cold water to cool off.
2. A cooling apparatus for ensuring the concentration of an aqueous solution of monomethylamine according to claim 1, wherein the top of the monomethylamine separation column (1) is connected to the condenser inlet (203) via an overflow pipe (6), the condenser first outlet (204) is connected to the cooler inlet (403) via the overflow pipe (6), and the cooler outlet (404) is connected to the monomethylamine absorption column (5) via the overflow pipe (6).
3. A cooling apparatus for ensuring the concentration of a monomethylamine aqueous solution according to claim 2, wherein the condenser (2) is provided at a lower end thereof with a second condenser outlet (205), the second condenser outlet (205) is connected to the water suction pump (3) through an overflow pipe (6), and the water suction pump (3) is connected to the monomethylamine separation column (1) through the overflow pipe (6).
4. A cooling apparatus for ensuring the concentration of monomethylamine in an aqueous solution according to claim 3, wherein the temperature of the gas mixture of monomethylamine and water vapor after condensation in the condenser (2) is about 50 ℃.
5. A cooling apparatus for ensuring the concentration of monomethylamine in an aqueous solution according to claim 1, wherein the temperature of the gas mixture of monomethylamine and water vapor after cooling in the cooler (4) is about 20 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120973402.5U CN214792107U (en) | 2021-05-08 | 2021-05-08 | Cooling device for ensuring concentration of monomethylamine aqueous solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120973402.5U CN214792107U (en) | 2021-05-08 | 2021-05-08 | Cooling device for ensuring concentration of monomethylamine aqueous solution |
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| Publication Number | Publication Date |
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| CN214792107U true CN214792107U (en) | 2021-11-19 |
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| CN202120973402.5U Active CN214792107U (en) | 2021-05-08 | 2021-05-08 | Cooling device for ensuring concentration of monomethylamine aqueous solution |
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2021
- 2021-05-08 CN CN202120973402.5U patent/CN214792107U/en active Active
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