CN212741192U - Device for extracting methyl nitrite in methanol solution - Google Patents
Device for extracting methyl nitrite in methanol solution Download PDFInfo
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- CN212741192U CN212741192U CN202021446388.5U CN202021446388U CN212741192U CN 212741192 U CN212741192 U CN 212741192U CN 202021446388 U CN202021446388 U CN 202021446388U CN 212741192 U CN212741192 U CN 212741192U
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Abstract
The device for extracting the methyl nitrite in the methanol solution is a chemical technology for preparing ethylene glycol from coal, and has the structural relationship that the upper end of a stripping tower is connected with a liquid-phase feeding stop valve; the pipeline terminal at the lower end of the gas stripping tower is connected with a methanol storage tank in the middle tank area, and the pipeline is respectively connected with a liquid phase discharge regulating valve, a liquid phase discharge stop valve, a liquid phase discharge two-position valve and a flowmeter; the high-purity carbon monoxide CO pipeline is connected to the stripping tower, and a carbon monoxide CO inlet regulating valve and a carbon monoxide CO inlet stop valve are connected to the high-purity carbon monoxide CO pipeline; the gas stripping tower is connected with the gas-liquid separation buffer tank through a pipeline, and a gas phase outlet regulating valve of a heat exchanger is connected to the pipeline; the gas-liquid separation buffer tank is respectively connected with the compressor inlet buffer tank and the liquid discharge tank, and a liquid phase discharge valve is connected on a pipeline between the gas-liquid separation buffer tank and the liquid discharge tank; a gas-liquid separator is arranged between the inlet buffer tank and the liquid discharge tank of the compressor.
Description
Technical Field
The utility model relates to a coal system ethylene glycol chemical industry technique especially draws device of methyl nitrite in methyl alcohol solution.
Background
At present, the known main method for extracting methyl nitrite from a methanol solution is a synthesis gas stripping method, and the method has the defects that the synthesis gas contains nitrogen oxide, and the content of CO is low, so that the methyl nitrite dissolved in the methanol solution cannot be completely resolved, the stripping effect is poor, the recovered nitrogen element is less, the raw material consumption is high, the content of nitrate in production wastewater is high, and the difficulty in sewage treatment is increased.
Disclosure of Invention
The utility model aims at providing a preparation is simpler draws device of methyl nitrite in methyl alcohol solution, and the operation is carried out dissolved inferior ester gas in the tower cauldron liquid of nitric acid reduction tower through the air stripping technology and is come out, fully retrieves nitrogen element, reduces the content of nitrate radical in raw and other materials consumption and the production waste water. The utility model comprises a liquid phase feeding stop valve, a gas stripping tower, a carbon monoxide gas inlet regulating valve, a gas-liquid separator, a gas-liquid separation buffer tank, a liquid phase discharging regulating valve, a heat exchanger gas phase outlet regulating valve, a liquid phase discharging valve, a compressor inlet buffer tank, a liquid discharging tank, a liquid phase discharging stop valve, a liquid phase discharging two-position valve, a flowmeter, a methanol storage tank in a middle tank area, a high purity carbon monoxide pipeline and a carbon monoxide gas inlet stop valve, wherein the upper end of the gas stripping tower is connected with the liquid phase feeding stop valve; the pipeline terminal of the lower end of the gas stripping tower is connected with a methanol storage tank in a middle tank area, and a liquid phase discharging regulating valve, a liquid phase discharging stop valve, a liquid phase discharging two-position valve and a flowmeter are respectively connected to the pipeline of the gas stripping tower.
The high-purity carbon monoxide tube line is connected to the stripping tower, and a carbon monoxide inlet regulating valve and a carbon monoxide inlet stop valve are connected to the high-purity carbon monoxide tube line.
The gas stripping tower is connected with the gas-liquid separation buffer tank through a pipeline, and a gas phase outlet regulating valve of a heat exchanger is connected to the pipeline; the gas-liquid separation buffer tank is respectively connected with the compressor inlet buffer tank and the liquid discharge tank, and a liquid phase discharge valve is connected on a pipeline between the gas-liquid separation buffer tank and the liquid discharge tank; a gas-liquid separator is arranged between the inlet buffer tank and the liquid discharge tank of the compressor.
The utility model discloses an application method: the first step is a liquid phase from P108A/B/C/D, wherein the methanol content is 60%, the nitric acid content is 0.15%, and the liquid phase enters a stripping tower from the top under the condition of the temperature of 60 ℃; after the liquid phase enters a stripping tower, spraying the liquid phase on a tower plate through a methanol distributor; step three, liquid phase and high-purity carbon monoxide gas with the purity of 98% entering from the lower part are in countercurrent contact, the gas extraction flow of the high-purity carbon monoxide is controlled in 1500Nm year, and in the gas-liquid contact process, the dissolved vinylene in the liquid phase can be released from the solution through a gas-liquid phase equilibrium driving force and is taken away by the gas phase; fourthly, the gas phase flows out of the tower top, the temperature of the tower top is controlled to be 50-55 ℃, the gas phase is mixed with the gas phase at the gas phase outlet of the heat exchanger, enters a gas-liquid separation buffer tank for gas-liquid separation, and finally returns to the inlet buffer tank of the compressor; and fifthly, the liquid phase in the tower kettle of the stripping tower is pressurized and conveyed to a methanol storage tank in the intermediate tank area by utilizing the self pressure of the tower, and the self pressure of the tower is 0.15 MPa.
The utility model discloses a meaning: through the operation of a gas stripping process, the gas of the methylene chloride dissolved in the tower bottom liquid of the nitric acid reduction tower is stripped, the nitrogen element is fully recovered, and the consumption of raw materials and the content of nitrate radical in the production wastewater are reduced.
Drawings
FIG. 1 is a schematic diagram of a stripper column configuration. In the figure, the device comprises a liquid phase feeding stop valve 2, a gas stripping tower 3, a carbon monoxide gas inlet regulating valve 4, a gas-liquid separator 5, a gas-liquid separation buffer tank 6, a liquid phase discharging regulating valve 7, a heat exchanger gas phase outlet regulating valve 8, a liquid phase discharging valve 9, a compressor inlet buffer tank 10, a liquid discharging tank 11, a liquid phase discharging stop valve 12, a liquid phase discharging two-position valve 13, a flowmeter 14, a methanol storage tank 15 of a middle tank area, a high-purity carbon monoxide pipeline 16 and a carbon monoxide gas inlet stop valve.
Detailed Description
The utility model discloses a liquid phase feeding stop valve 1, gas stripping tower 2, carbon monoxide admit air governing valve 3, vapour and liquid separator 4, gas-liquid separation buffer tank 5, liquid phase ejection of compact governing valve 6, heat exchanger gas phase export governing valve 7, liquid phase blow-off valve 8, compressor entry buffer tank 9, flowing back jar 10, liquid phase ejection of compact stop valve 11, liquid phase ejection of compact two-position valve 12, flowmeter 13, intermediate tank district methyl alcohol storage tank 14, high purity carbon monoxide pipeline 15, carbon monoxide admit air stop valve 16, the upper end of gas stripping tower 2 is connected with liquid phase feeding stop valve 1; the pipeline terminal of the lower end of the gas stripping tower 2 is connected with a methanol storage tank 14 in the middle tank area, and a liquid phase discharging regulating valve 6, a liquid phase discharging stop valve 11, a liquid phase discharging two-position valve 12 and a flowmeter 13 are respectively connected to the pipeline.
The high-purity carbon monoxide pipeline 15 is connected to the stripping tower 2, and the high-purity carbon monoxide pipeline 15 is connected to the carbon monoxide inlet adjusting valve 3 and the carbon monoxide inlet stop valve 16.
The gas stripping tower 2 is connected with a gas-liquid separation buffer tank 5 through a pipeline, and a gas phase outlet regulating valve 7 of a heat exchanger is connected to the pipeline; the gas-liquid separation buffer tank 5 is respectively connected with the compressor inlet buffer tank 9 and the liquid discharge tank 10, and a liquid phase discharge valve 8 is connected on a pipeline between the gas-liquid separation buffer tank 5 and the liquid discharge tank 10; a gas-liquid separator 4 is arranged between a compressor inlet buffer tank 9 and a liquid discharge tank 10.
The application method of the invention comprises the following steps: the first step is a liquid phase from P108A/B/C/D, wherein methanol content is 60%, nitric acid is 0.15%, and enters a stripping tower 2 from the top under the condition of temperature 60 ℃; after the liquid phase enters a stripping tower 2, the liquid phase is sprayed on a tower plate through a methanol distributor; step three, liquid phase and high-purity carbon monoxide gas with the purity of 98% entering from the lower part are in countercurrent contact, the gas extraction flow of the high-purity carbon monoxide is controlled in 1500Nm year, and in the gas-liquid contact process, the dissolved vinylene in the liquid phase can be released from the solution through a gas-liquid phase equilibrium driving force and is taken away by the gas phase; fourthly, the gas phase flows out of the tower top, the temperature of the tower top is controlled to be 50-55 ℃, the gas phase is mixed with the gas phase at the gas phase outlet of the heat exchanger, enters a gas-liquid separation buffer tank 5 for gas-liquid separation, and finally returns to a compressor inlet buffer tank 9; and fifthly, the liquid phase in the tower kettle of the stripper 2 is pressurized and conveyed to a methanol storage tank 14 in the intermediate tank area by utilizing the pressure of the tower, and the pressure of the tower is 0.15 MPa.
Claims (3)
1. Draw device of methyl nitrite in methyl alcohol solution, it includes liquid phase feeding stop valve (1), gas stripping tower (2), carbon monoxide governing valve (3) that admits air, vapour and liquid separator (4), gas-liquid separation buffer tank (5), liquid phase ejection of compact governing valve (6), heat exchanger gas outlet governing valve (7), liquid phase relief valve (8), compressor entry buffer tank (9), leakage fluid dram (10), liquid phase ejection of compact stop valve (11), two valves of liquid phase ejection of compact (12), flowmeter (13), intermediate tank district methyl alcohol storage tank (14), high-purity carbon monoxide pipeline (15), carbon monoxide stop valve (16) that admits air, characterized by: the upper end of the gas stripping tower (2) is connected with a liquid-phase feeding stop valve (1); the pipeline terminal of the lower end of the gas stripping tower (2) is connected with a methanol storage tank (14) of the intermediate tank area, and a liquid phase discharging regulating valve (6), a liquid phase discharging stop valve (11), a liquid phase discharging two-position valve (12) and a flowmeter (13) are respectively connected to the pipeline of the gas stripping tower.
2. The apparatus for extracting methyl nitrite from methanol solution as claimed in claim 1, wherein: the high-purity carbon monoxide pipeline (15) is connected to the stripping tower (2), and the high-purity carbon monoxide pipeline (15) is connected with a carbon monoxide inlet adjusting valve (3) and a carbon monoxide inlet stop valve (16).
3. The apparatus for extracting methyl nitrite from methanol solution as claimed in claim 1, wherein: the gas stripping tower (2) is connected with the gas-liquid separation buffer tank (5) through a pipeline, and a gas phase outlet regulating valve (7) of a heat exchanger is connected to the pipeline; the gas-liquid separation buffer tank (5) is respectively connected with the compressor inlet buffer tank (9) and the liquid discharge tank (10), and a liquid phase discharge valve (8) is connected on a pipeline between the gas-liquid separation buffer tank (5) and the liquid discharge tank (10); a gas-liquid separator (4) is arranged between a compressor inlet buffer tank (9) and a liquid discharge tank (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021446388.5U CN212741192U (en) | 2020-07-21 | 2020-07-21 | Device for extracting methyl nitrite in methanol solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021446388.5U CN212741192U (en) | 2020-07-21 | 2020-07-21 | Device for extracting methyl nitrite in methanol solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212741192U true CN212741192U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021446388.5U Active CN212741192U (en) | 2020-07-21 | 2020-07-21 | Device for extracting methyl nitrite in methanol solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212741192U (en) |
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2020
- 2020-07-21 CN CN202021446388.5U patent/CN212741192U/en active Active
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