CN218248577U - Multistage efficient condensation process system for methanol rectification - Google Patents
Multistage efficient condensation process system for methanol rectification Download PDFInfo
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- CN218248577U CN218248577U CN202220780974.6U CN202220780974U CN218248577U CN 218248577 U CN218248577 U CN 218248577U CN 202220780974 U CN202220780974 U CN 202220780974U CN 218248577 U CN218248577 U CN 218248577U
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Abstract
The utility model discloses a multistage high-efficiency condensation process system for methanol rectification, which is characterized by comprising an atmospheric tower (1), wherein the top of the atmospheric tower (1) is connected with a water cooler (2) and a plurality of sets of air coolers (3) which are connected in parallel through pipelines for condensation combination; the two water coolers (2) are connected in parallel; the water cooler (2) is connected with the air cooler (3) in parallel. The utility model discloses can effectively reduce the recirculated cooling water quantity, slow down water cooler (2) scale deposit, rationally improve heat exchange efficiency, ensure the long period operation of system, have good social.
Description
Technical Field
The utility model discloses specifically carry out a lot of fractional condensation, cooling and then obtain the technology of product methyl alcohol to the methyl alcohol steam that produces in the coal chemical industry methyl alcohol rectifying process, belong to coal chemical industry technical field.
Background
At present, in the coal chemical industry production, the main processes of the rectification process of the crude methanol comprise double-tower rectification, three-tower rectification and four-tower rectification, and for a large-scale methanol device, the utilization rate of the four-tower rectification process is higher.
The four-tower rectification is that a methanol recovery tower is added on the basis of the three-tower rectification. The main process flow is as follows: crude methanol from a synthesis process enters a pre-rectifying tower after the pH value is preheated and adjusted, light components (mainly non-condensable gas, dimethyl ether and the like) are removed, and the methanol at the bottom of the tower enters a pressurized rectifying tower after being pressurized by a pump; methanol steam on the top of the pressurizing tower enters a tower kettle of the atmospheric tower, a heat source is provided for the bottom of the atmospheric tower by utilizing the temperature difference between the top of the pressurizing rectifying tower, the top of the atmospheric rectifying tower and the bottom of the atmospheric rectifying tower, and gas phase on the top of the pressurizing tower is condensed. One part of the condensed refined methanol is used as product methanol, and the other part of the condensed refined methanol enters a reflux tank and is used as reflux liquid of the pressurizing tower; methanol, high-boiling components, water and the like at the bottom of the pressurizing tower enter the normal pressure tower, and a refined methanol product is distilled from the top of the normal pressure tower. Generally, methanol vapor at the top of the atmospheric tower is primarily converted into liquid methanol to enter a feed tank of a recovery tower through heat exchange and cooling with circulating water, the condensed liquid methanol is pressurized by a pump and then enters a water cooler for secondary cooling, and then the condensed liquid methanol is output as product methanol.
The normal pressure tower is taken as a main methanol extraction tower, the amount of methanol steam generated at the top of the tower is large, and the requirements on a condenser at the top of the tower and a product cooler are high. The utility model discloses combine the technological characteristics of rectification process, carefully compare, assay each item operational data, through taking hierarchical, many times high-efficient condensation technology, alleviate methanol condensation difficulty scheduling problem in the methanol rectification effectively.
In the conventional process flow, the top of the atmospheric tower and the product extraction are respectively provided with a water cooler, the atmospheric tower is taken as a main methanol extraction tower, the amount of methanol steam generated at the top of the tower is large, the demand for cooling water is large, and meanwhile, the water cooler is easy to scale after long-term operation, so that the heat exchange efficiency is influenced, and the long-term operation of a system is not facilitated.
In comprehensive consideration, a methanol rectification and condensation system needs to be further integrated and improved, and the heat exchange efficiency is improved by combining multiple condensation modes.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a multistage high-efficient condensation process system of methyl alcohol rectification is provided, has overcome the above-mentioned shortcoming of prior art, has the characteristics that improve heat exchange efficiency.
The utility model discloses the technical problem that solve is realized through following technical scheme:
a multistage high-efficiency condensation process system for methanol rectification comprises an atmospheric tower, wherein the top of the atmospheric tower is connected with a condensation combination of a water cooler and a plurality of sets of air coolers in parallel through pipelines; the two water coolers are connected in parallel; and the water cooler is connected with the air cooler in parallel.
Valves are arranged on the water cooler, the inlet pipeline and the outlet pipeline of the air cooler;
and a pressure pump is arranged on the connecting pipeline of the recovery tower feed chute and the two water coolers connected in parallel.
The utility model discloses a comparing, the analysis, considering to adopt the mode that multiple different grade type condenser combined together as methyl alcohol rectification top of the tower condenser, can reducing methyl alcohol rectification like this to the dependence of recirculated cooling water, can be simultaneously according to the factor change circumstances such as environment, temperature, the operation load of each condenser of proper adjustment and distribution improves the utilization ratio of cold volume effectively. In addition, the existing mode that one cooler is replaced by a mode that a plurality of coolers are connected in parallel is adopted, so that a plurality of coolers can be alternately or simultaneously used for heat exchange and cooling of the product methanol according to production needs, and on one hand, scaling of a water cooler can be relieved, and heat exchange efficiency is improved; on the other hand, the scale-formed water cooler can be cleaned on line under the condition that the system operation is not influenced, and the long-period operation of the system is ensured.
The utility model discloses an above-mentioned technical scheme has following beneficial effect:
the utility model discloses can effectively reduce the recirculated cooling water quantity, slow down the water cooler scale deposit, rationally improve heat exchange efficiency, ensure the long period of system operation, have good social.
Drawings
FIG. 1 is a schematic view of the structure of the process system of the present invention
Numbering in the figures: 1-atmospheric tower, 2-water cooler, 3-air cooler, 4-valve, 5-pressurizing tower pump, 6-water cooler, 6-recovery tower feed tank
Detailed Description
The multistage efficient condensation process system for methanol rectification shown in the figure 1 is characterized by comprising an atmospheric tower 1, wherein the top of the atmospheric tower 1 is connected with a condensation combination of a water cooler 2 and a plurality of sets of air coolers 3 in parallel through pipelines; the two water coolers 2 are connected in parallel; the water cooler 2 is connected with an air cooler 3 in parallel.
and a pressurizing tower pump 5 is arranged on a connecting pipeline of the atmospheric tower and the two water coolers 3 connected in parallel.
And a booster pump 5 is arranged on a connecting pipeline of the recovery tower feeding tank 6 and the two water coolers 2 connected in parallel.
In methyl alcohol rectification system, the utility model discloses 1 tops of the tower of atmospheric tower adopts many, condenses top of the tower methyl alcohol steam like 20 parallelly connected modes of air cooler 3 and a water cooler 2, the import and export pipeline of air cooler and water cooler all sets up valve 4, is convenient for right the load of air cooler and water cooler is adjusted. And part of the liquid methanol condensed at the top of the atmospheric tower firstly enters a feed tank of a recovery tower, is pressurized by a pressure pump 5 and then enters two water coolers 2 connected in parallel for further cooling to below 40 ℃, and is taken as a product methanol to be sent out.
Claims (3)
1. A methanol rectification multistage efficient condensation process system is characterized by comprising an atmospheric tower (1), wherein the top of the atmospheric tower (1) is connected with a water cooler (2) and a plurality of sets of air coolers (3) which are connected in parallel through pipelines for condensation combination; the two water coolers (2) are connected in parallel; a water cooler (2) is connected with an air cooler (3) in parallel.
2. The methanol rectification multistage high-efficiency condensation process system as claimed in claim 1, wherein valves (4) are arranged on inlet pipelines and outlet pipelines of the water cooler (2) and the air cooler (3).
3. The multistage high-efficiency condensation process system for methanol rectification as claimed in claim 1 or 2, characterized in that a pressure pump (5) is arranged on a connecting pipeline between a feed tank (6) of the recovery tower and the two water coolers (2) connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220780974.6U CN218248577U (en) | 2022-04-01 | 2022-04-01 | Multistage efficient condensation process system for methanol rectification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220780974.6U CN218248577U (en) | 2022-04-01 | 2022-04-01 | Multistage efficient condensation process system for methanol rectification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218248577U true CN218248577U (en) | 2023-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220780974.6U Active CN218248577U (en) | 2022-04-01 | 2022-04-01 | Multistage efficient condensation process system for methanol rectification |
Country Status (1)
| Country | Link |
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| CN (1) | CN218248577U (en) |
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2022
- 2022-04-01 CN CN202220780974.6U patent/CN218248577U/en active Active
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