A methanol integrated production system

Abstract

The utility model relates to chemical production technology, show a kind of methanol linkage production system, including methanol column, butyl alcohol column, light component column and controller, the waste methanol outlet of butyl alcohol column is equipped with waste methanol reflux pipeline, one end of waste methanol reflux pipeline is connected with methanol column, the top of butyl alcohol column and light component column is all connected with gas phase heat source output pipeline, gas phase heat source output pipeline is connected with methanol column, heat exchanger is provided on gas phase heat source output pipeline, flowmeter is equipped on the gas phase heat source output pipeline near methanol column, the top of methanol column is provided with condenser, methanol column is connected with condenser by gas phase methanol pipeline, flowmeter is equipped on gas phase methanol pipeline, condenser outlet is connected with methanol product collection tank by pipeline, by introducing waste methanol reflux into methanol column and using the gas phase heat source of other column in system to rectify, make methanol purity promote to >=90%, avoid secondary rectification, improve product quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and more specifically, to a methanol integrated production system. Background Technology

[0002] In the production process of butanol aqueous solution feedstock, traditional treatment methods result in low purity of methanol and light component products produced by waste methanol reflux, poor distillation efficiency, and insufficient utilization of heat source, requiring secondary processing and purification. At the same time, the steam energy consumption is high, which increases production costs. Utility Model Content

[0003] This application provides a methanol integrated production system that solves the problems of low purity of methanol and light component products produced by the recycling of waste methanol in traditional treatment methods, poor distillation efficiency and insufficient utilization of heat source, requiring secondary processing and purification, and high steam energy consumption, which increases production costs.

[0004] This application provides a methanol integrated production system, including a methanol tower, a butanol tower, a light component tower, and a controller. The butanol tower has a waste methanol reflux pipe installed at its waste methanol outlet, one end of which is connected to the methanol tower. Both the butanol tower and the light component tower have gas phase heat source output pipes connected to their tops. These gas phase heat source output pipes are connected to the methanol tower, and a heat exchanger is installed on the gas phase heat source output pipe. A flow meter is installed on the gas phase heat source output pipe near the methanol tower. A condenser is installed at the top of the methanol tower, and the methanol tower and the condenser are connected via a gas phase methanol outlet pipe. The flow meter is also installed on the gas phase methanol outlet pipe. The liquid outlet of the condenser is connected to a methanol product collection tank via a pipe.

[0005] Preferably, a filter is installed on the waste methanol return pipeline, and a flow meter is installed on the waste methanol return pipeline near the waste methanol outlet.

[0006] Preferably, the methanol tower is provided with a waste liquid discharge pipe at the bottom of the tower, and the waste liquid discharge pipe is connected to a waste liquid treatment tank.

[0007] Preferably, the heat exchanger is a shell-and-tube heat exchanger, and the tube-side outlet of the heat exchanger is connected to a vapor-phase condensate pipe, one end of which is connected to a condensate collection tank.

[0008] Preferably, temperature sensors and pressure sensors are installed on the bodies of the methanol tower, butanol tower, and light component tower.

[0009] Preferably, the safety interlock device of the controller is equipped with an alarm.

[0010] Preferably, the controller is electrically connected to the heat exchanger, the temperature sensor, the pressure sensor, and the flow meter.

[0011] As can be seen from the above technical solution, this application provides a methanol integrated production system. In use, waste methanol is refluxed into the methanol tower through the waste methanol reflux pipeline. At the same time, the gas phase heat source discharged from the top of the butanol tower and the light component tower is transported to the heat exchanger through the gas phase heat source output pipeline. In the heat exchanger, the gas phase heat source exchanges heat with the waste methanol reflux in the methanol tower, causing the methanol component in the waste methanol to vaporize and rise. The vaporized methanol is then distilled in the methanol tower, and separation is achieved by utilizing the difference in boiling points between methanol and other light components. The gas phase methanol generated at the top of the methanol tower is condensed by the condenser and converted into liquid high-purity methanol, which is collected in the methanol product collection tank. The waste liquid at the bottom of the methanol tower is discharged through the waste liquid discharge pipeline and collected in the waste liquid treatment tank. The controller in the entire system monitors and controls the pressure, temperature, etc. of each tower in real time to ensure the distillation effect and the stable operation of the system.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model improves the methanol purity from the lower level of the original process to ≥90% by introducing waste methanol back into the methanol tower and using the gas phase heat source of other towers in the system for distillation, thus meeting the requirements for direct use, avoiding secondary distillation, and improving product quality and production efficiency.

[0013] 2. This utility model utilizes the waste heat within the system to replace traditional steam heating, which can reduce steam energy consumption by 30%-50%, lower energy costs, and improve the economic benefits of enterprises. In the context of continuously rising energy prices, it has a significant cost advantage.

[0014] 3. This utility model eliminates the independent methanol purification unit, shortens the production process, reduces equipment investment and maintenance costs, improves system integration, reduces the risk of failure during production, reduces equipment footprint, and improves the enterprise's production flexibility and adaptability.

[0015] 4. This utility model reduces energy consumption and carbon emissions simultaneously, which meets the requirements of green chemical development. It also reduces wastewater and waste gas generated from secondary processing, thereby reducing environmental pollution and helping enterprises meet environmental regulations.

[0016] In summary, a methanol integrated production system improves methanol purity from the lower level of the original process to ≥90% by introducing waste methanol back into the methanol tower and using the gas phase heat source of other towers in the system for distillation. This meets the requirements for direct use, avoids secondary distillation, improves product quality and production efficiency, eliminates the need for a separate methanol purification unit, shortens the production process, reduces equipment investment and maintenance costs, improves system integration, reduces the risk of failure during production, reduces equipment footprint, and enhances the enterprise's production flexibility and adaptability. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of a methanol-linked production system provided by this utility model.

[0019] The reference numerals in the detailed embodiments are as follows: 1. Methanol tower; 2. Butanol tower; 3. Light component tower; 4. Waste methanol reflux pipeline; 5. Gas phase heat source output pipeline; 6. Heat exchanger; 7. Condenser; 8. Filter; 9. Waste methanol outlet; 10. Temperature sensor; 11. Pressure sensor; 12. Flow meter; 13. Gas phase methanol outlet pipeline; 14. Methanol product collection tank; 15. Waste liquid treatment tank; 16. Waste liquid discharge pipeline; 17. Controller; 18. Safety interlock device; 19. Alarm; 20. Gas phase condensate pipeline; 21. Condensate collection tank. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0021] See Figure 1This application discloses a methanol integrated production system. To address the problems of low purity, poor distillation efficiency, and insufficient heat source utilization resulting from the recirculation of waste methanol in traditional processing methods, which necessitate secondary processing and purification, while also consuming high amounts of steam and increasing production costs, this application proposes a methanol integrated production system. By recirculating waste methanol into a methanol tower and utilizing the vapor-phase heat source from other towers within the system for distillation, the methanol purity is increased from the low level of the original process to ≥90%, meeting direct use requirements. This avoids secondary distillation, improves product quality and production efficiency, eliminates the need for a separate methanol purification unit, shortens the production process, reduces equipment investment and maintenance costs, improves system integration, reduces the risk of failure during production, reduces equipment footprint, and enhances the enterprise's production flexibility and adaptability.

[0022] Specifically, a methanol integrated production system includes a methanol tower 1, a butanol tower 2, a light component tower 3, and a controller 17. Temperature sensors 10 and pressure sensors 11 are installed on the tower bodies of methanol tower 1, butanol tower 2, and light component tower 3. An alarm 19 is installed in the safety interlock device 18 of the controller 17. This system is equipped with a safety interlock device 18, which automatically triggers an alarm and adjusts relevant parameters when the temperature or pressure exceeds the set range to ensure safe operation. A waste methanol reflux pipe 4 is installed at the waste methanol outlet 9 of the butanol tower 2. A filter 8 is installed on the waste methanol reflux pipe 4, which effectively filters impurities to prevent affecting the distillation efficiency in the methanol tower 1. A flow meter 12 is installed on the waste methanol reflux pipe 4 near the waste methanol outlet 9. One end of the waste methanol reflux pipe 4 is connected to the methanol tower 1, and waste methanol refluxes into the methanol tower 1 through the waste methanol reflux pipe 4. A gas phase heat source output pipe 5 is connected to the top of both the butanol tower 2 and the light component tower 3. Pipeline 5 is connected to methanol tower 1. A heat exchanger 6 is installed on pipeline 5. The gas phase heat source discharged from the top of butanol tower 2 and light component tower 3 is transported to heat exchanger 6 through pipeline 5. In heat exchanger 6, the gas phase heat source exchanges heat with the waste methanol reflux in methanol tower 1, causing the methanol component in the waste methanol to vaporize and rise. The vaporized methanol is then distilled in methanol tower 1, utilizing the boiling point difference between methanol and other light components to achieve separation. Heat exchanger 6 is a shell-and-tube heat exchanger. The shell side flows, and the waste methanol flows back in the tube side. The heating temperature is precisely controlled by adjusting the heat exchange area of ​​heat exchanger 6 and the flow rate of gas phase heat source. The tube side outlet of heat exchanger 6 is connected to a gas phase condensate pipe 20. One end of the gas phase condensate pipe 20 is connected to a condensate collection tank 21. The flow meter 12 is installed on the gas phase heat source output pipe 5 near methanol tower 1. By optimizing the arrangement of heat exchanger 6 and the flow rate of gas phase heat source, the system achieves efficient heat exchange and stable operation, while reducing energy consumption and production costs. A condenser 7 is installed at the top of methanol tower 1. Methanol tower 1 and condenser 7 are connected via a vapor phase methanol pipeline 13, which is equipped with a flow meter 12. The liquid outlet of condenser 7 is connected to a methanol product collection tank 14 via a pipeline. The vapor phase methanol generated at the top of methanol tower 1 is condensed by condenser 7 and converted into high-purity liquid methanol, which is collected in the methanol product collection tank 14. A waste liquid discharge pipeline 16 is installed at the bottom of methanol tower 1, which is connected to a waste liquid treatment tank 15. The waste liquid at the bottom of methanol tower 1 is discharged through the waste liquid discharge pipeline 16 and collected in the waste liquid treatment tank 15. A controller 17 is electrically connected to heat exchanger 6, temperature sensor 10, pressure sensor 11, and flow meter 12. In the entire system, the controller 17 monitors the pressure, temperature, flow rate, etc. of each tower. Real-time monitoring and control are implemented, and valve adjustments are made to ensure that the heat load of methanol tower 1 is matched. For example, the gas phase temperature needs to be higher than the boiling point of the material in methanol tower 1 to provide sufficient heat for the methanol components to vaporize. At the same time, excess heat should be avoided to prevent energy waste, thus ensuring the distillation effect and stable operation of the system. The waste heat in the system is used to replace traditional steam heating, which can reduce steam energy consumption by 30%-50%, reduce energy costs, eliminate the independent methanol purification unit, shorten the production process, reduce equipment investment and maintenance costs, improve system integration, and realize cross-tower synergy of gas phase heat sources. The gas phase heat source discharged from the top of other towers has a high temperature and contains uncondensed heat energy. It is introduced into methanol tower 1 as heat exchange energy, which improves the comprehensive utilization efficiency of energy and reduces energy waste.

[0023] As can be seen from the above technical solution, in the operation of a methanol-linked production system, waste methanol reflux flows into methanol tower 1 through waste methanol reflux pipe 4. Simultaneously, the vapor-phase heat source discharged from the top of butanol tower 2 and light component tower 3 is transported to heat exchanger 6 through vapor-phase heat source output pipe 5. In heat exchanger 6, the vapor-phase heat source exchanges heat with the waste methanol reflux in methanol tower 1, causing the methanol component in the waste methanol to vaporize and rise. The vaporized methanol undergoes distillation in methanol tower 1, utilizing the boiling point difference between methanol and other light components to achieve separation. The vapor-phase methanol generated at the top of methanol tower 1 is condensed by condenser 7 and converted into high-purity liquid methanol, which is collected in methanol product collection tank 14. The methanol product at the bottom of methanol tower 1... Waste liquid is discharged through waste liquid discharge pipe 16 and collected in waste liquid treatment tank 15; the controller 17 of the whole system monitors and controls the pressure, temperature and other parameters of each tower in real time to ensure the distillation effect and the stable operation of the system. The heat exchanger 6 adopts a shell and tube structure, with the gas phase heat source flowing in the shell side and the waste methanol reflux flowing in the tube side. The heating temperature is precisely controlled by adjusting the heat exchange area and gas phase heat source flow rate of the heat exchanger 6; the filter 8 equipped on the waste methanol reflux pipe 4 can effectively filter impurities to prevent affecting the distillation efficiency in methanol tower 1; the system is also equipped with a safety interlock device 18, which automatically triggers an alarm and adjusts relevant parameters when the temperature or pressure exceeds the set range to ensure safe operation.

[0024] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the applications disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and incorporate common knowledge or customary techniques in the art disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0025] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. A methanol integrated production system, characterized in that: The system includes a methanol tower (1), a butanol tower (2), a light component tower (3), and a controller (17). The waste methanol outlet (9) of the butanol tower (2) is equipped with a waste methanol reflux pipe (4). One end of the waste methanol reflux pipe (4) is connected to the methanol tower (1). The tops of the butanol tower (2) and the light component tower (3) are both connected to a gas phase heat source output pipe (5). The gas phase heat source output pipe (5) is connected to the methanol tower (1). A heat exchanger (6) is installed on the gas phase heat source output pipe (5). A flow meter (12) is installed on the gas phase heat source output pipe (5) near the methanol tower (1). A condenser (7) is installed at the top of the methanol tower (1). The methanol tower (1) and the condenser (7) are connected through a gas phase methanol outlet pipe (13). A flow meter (12) is installed on the gas phase methanol outlet pipe (13). The liquid outlet of the condenser (7) is connected to a methanol product collection tank (14) through a pipe.

2. The methanol integrated production system according to claim 1, characterized in that: A filter (8) is installed on the waste methanol return pipe (4), and a flow meter (12) is installed on the waste methanol return pipe (4) near the waste methanol outlet (9).

3. The integrated methanol production system of claim 1, wherein: The methanol tower (1) is equipped with a waste liquid discharge pipe (16) at the bottom of the tower, and the waste liquid discharge pipe (16) is connected to a waste liquid treatment tank (15).

4. The integrated methanol production system of claim 1, wherein: The heat exchanger (6) is a shell and tube heat exchanger. The tube side outlet of the heat exchanger (6) is connected to a vapor phase condensate pipe (20), and one end of the vapor phase condensate pipe (20) is connected to a condensate collection tank (21).

5. The integrated methanol production system of claim 1, wherein: Temperature sensors (10) and pressure sensors (11) are installed on the bodies of the methanol tower (1), butanol tower (2) and light component tower (3).

6. The integrated methanol production system of claim 5, wherein: The controller (17) is equipped with an alarm (19) in its safety interlock device (18).

7. The integrated methanol production system of claim 6, wherein: The controller (17) is electrically connected to the heat exchanger (6), the temperature sensor (10), the pressure sensor (11), and the flow meter (12).

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