Low-temperature methanol washing regeneration reheating device
By connecting the low-temperature methanol-bearing pipeline with a higher temperature, the rapid reheating and heating of low-temperature methanol is achieved, which solves the problem of insufficient return rate of low-temperature methanol, reduces energy consumption and operation complexity, and improves the operating efficiency of the system.
Patent Information
- Application Number
- CN202422244939.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-13
AI Technical Summary
After the low-temperature methanol washing device system is stopped, the low-temperature methanol return rate is insufficient, resulting in long reheating time, high energy consumption, excessive emissions, and inability to operate normally.
A low-temperature methanol washing regeneration reheating device is designed. By connecting to a methanol-leaving pipeline with a higher temperature, the mixture of methanol-leaving and low-temperature methanol is used to reduce the operation steps, increase the reheating speed, and reduce production energy consumption.
It realizes rapid reheating and heating of low-temperature methanol, reduces operational complexity and energy consumption, and improves the operating efficiency and safety of the system.
Smart Images
Figure CN223027069U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of low-temperature methanol utilization treatment, and particularly relates to a regeneration reheating device for low-temperature methanol washing. Background Art
[0002] After the low-temperature methanol washing device system stops operating, it is necessary to regenerate the low-temperature methanol in the system to be qualified and the temperature to return to normal before it can be discharged to other storage tanks. However, in actual operation, the temperature return rate of the low-temperature methanol in the system fails to meet the requirements. When the system stops and reheats, it is necessary to discharge the low-temperature methanol in the underground tank, and then send it to the hot zone for regeneration after being pressurized by a pump. This operation has a small discharge volume, a long reheating time, high energy consumption, and an excessive discharge volume resulting in too low a temperature, causing the underground tank pump interlock to fail to operate. Content of the Utility Model
[0003] The utility model provides a regeneration reheating device for low-temperature methanol washing. By connecting to a lean methanol pipeline with a higher temperature, when the system is reheated normally, the operation is reduced, the liquid discharge and reheating speed are increased, and the production energy consumption is reduced.
[0004] The specific scheme is as follows:
[0005] A regeneration reheating device for low-temperature methanol washing includes a low-temperature methanol washing device, which is connected to a flash tank through a regulating valve A pipeline. The flash tank is connected to a gas-phase storage tank and a liquid-phase storage tank; a lean methanol pipeline is also connected between the regulating valve A and the flash tank; the lean methanol pipeline includes a lean methanol storage tank, which passes through a heat exchanger via a pressure pump, and then passes through a pressure reducing valve and a gate valve, and is connected to the pipeline between the regulating valve A and the flash tank; the heat exchanger is connected to a circulating water pipeline.
[0006] A regulating valve B is arranged between the flash tank and the liquid-phase storage tank.
[0007] Gate valves are arranged on both sides of the regulating valve A and the regulating valve B, and gate valves are also arranged in parallel. When the regulating valve is damaged, by closing the gate valves on both sides and opening the parallel gate valves, the regulating valve can be repaired without shutting down the machine.
[0008] The pressure reducing valve is connected to the lean methanol treatment system through a gate valve. When the regeneration reheating of the low-temperature methanol washing is not required, the lean methanol pipeline can operate normally.
[0009] In the utility model, lean methanol passes through a pressure pump from the lean methanol storage tank, and after passing through a heat exchanger, the temperature is 40°C. After being decompressed by a pressure reducing valve, it is mixed and reheated with the low-temperature methanol (temperature -30°C) discharged from the low-temperature methanol washing device, and then enters the flash tank for flashing. The flashed gas phase enters the gas-phase storage tank for the flare combustion tower, and the liquid phase enters the liquid-phase storage tank through the regulating valve B for further post-treatment system. The utility model realizes reducing the operation, increasing the liquid discharge and reheating speed, and reducing the production energy consumption by connecting to a lean methanol pipeline with a higher temperature when the system is reheated normally. Description of the Drawings
[0010] Figure 1 . Schematic structural diagram of the present utility model. Detailed Description of the Preferred Embodiments
[0011] As Figure 1 shown, a regenerative reheating device for cold methanol washing includes a cold methanol washing device 1, which is connected to a flash tank 3 through a regulating valve A 2 via a pipeline. The flash tank 3 is connected to a gas-phase storage tank 4 and a liquid-phase storage tank 5; a lean methanol pipeline is also connected between the regulating valve A 2 and the flash tank 3; the lean methanol pipeline includes a lean methanol storage tank 6, which passes through a pressure pump 7, a heat exchanger 8, a pressure reducing valve 9, and a gate valve 10, and is connected between the regulating valve A 2 and the flash tank 3; the heat exchanger 8 is connected to a circulating water pipeline 11.
[0012] A regulating valve B 12 is provided between the flash tank 3 and the liquid-phase storage tank 5.
[0013] Gate valves 10 are provided on both sides of the regulating valve A 2 and the regulating valve B 12, and gate valves 10 are also provided in a parallel connection manner, so that when the regulating valve is damaged, the regulating valve can be repaired without shutting down the machine by closing the gate valves on both sides and opening the parallel-connected gate valves.
[0014] The pressure reducing valve 9 is connected to a lean methanol treatment system 13 through a gate valve 10, and when regenerative reheating of cold methanol washing is not required, the lean methanol pipeline can operate normally.
[0015] In the present utility model, after the lean methanol passes through the pressure pump 7 and the heat exchanger 8 from the lean methanol storage tank 6, the temperature is 40 °C. After being decompressed by the pressure reducing valve 9, it is mixed and reheated with the cold methanol (temperature -30 °C) discharged from the cold methanol washing device 1 to enter the flash tank 3 for flashing. The flashed gas phase enters the gas-phase storage tank 4 for the flare combustion tower, and the liquid phase enters the liquid-phase storage tank 5 through the regulating valve B 12 for further post-treatment system. The present utility model realizes normal reheating of the system by connecting a lean methanol pipeline with a higher temperature, reduces operation during normal reheating of the system, improves the speed of liquid discharge and reheating, and reduces production energy consumption.
[0016] The above are only some preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims
1. A low-temperature methanol washing regeneration and reheating device, characterized in that: It includes a low-temperature methanol washing device, and is connected to a flash tank through a regulating valve A pipeline, and the flash tank is connected to a gas phase storage tank and a liquid phase storage tank; a lean methanol pipeline is also connected between the regulating valve A and the flash tank; the lean methanol pipeline includes a lean methanol storage tank, which is connected between the regulating valve A and the flash tank through a pressure pump, a heat exchanger, a pressure reducing valve, and a gate valve; the heat exchanger is connected to a circulating water pipeline.
2. The low-temperature methanol washing regeneration and reheating device according to claim 1 is characterized in that: A regulating valve B is installed between the flash tank and the liquid phase storage tank.
3. The low-temperature methanol washing regeneration and reheating device according to claim 2 is characterized in that: Gate valves are arranged on both sides of the regulating valve A and the regulating valve B, and gate valves are arranged on both sides in parallel.
4. The low-temperature methanol washing regeneration and reheating device according to claim 1, characterized in that: The pressure reducing valve is connected to the lean methanol processing system via a gate valve.