Vacuum system for condensing and recycling methanol material in chemical place

Abstract

The utility model relates to a vacuum system for condensing and recycling methanol materials in a chemical place, which comprises a front-end condenser, a front-end vacuum tank, a dry vacuum pump, a rear-end condenser, a rear-end recycling tank and a reflux catcher, the front-end condenser is connected with an inlet pipeline for condensing and recycling the methanol materials, the front-end vacuum tank is connected with the front-end condenser, and the dry vacuum pump is connected with the rear-end recycling tank. The rear part of the front-end vacuum tank is connected with a dry vacuum pump, the rear part of the dry vacuum pump is connected with a rear-end condenser, the rear part of the rear-end condenser is connected with a rear-end recovery tank into which condensed materials flow, and the rear part of the rear-end recovery tank is connected with a reflux catcher for preventing secondary volatilization of methanol in the rear-end recovery tank. The device is compact in structure, small in occupied area, good in stability and convenient to install and overhaul; in the vacuum suction work, the methanol material is condensed and recycled for multiple times. Secondary recycling of methanol can be achieved, the production cost is reduced, the tail gas treatment amount is reduced through condensation recycling, and the waste gas treatment pressure is effectively reduced.

Description

Technical Field

[0001] The utility model relates to a material condensation recovery system, in particular to a methanol material condensation recovery vacuum system in a chemical industry site, which conducts multiple condensations and recoveries on methanol materials. Through condensation recovery, the tail gas treatment volume is reduced, and the waste gas treatment pressure is effectively reduced. Background Technique

[0002] In the production of chemical products by chemical enterprises, methanol, as a commonly used product additive, is often used in the processing and manufacturing of chemical products. During the product production process, due to the technological requirements of the product itself, it is necessary to remove the methanol solvent inside. Previously, other types of vacuum pumps or single-vacuum pump equipment were mostly used. Although they could meet the production requirements, they caused problems such as a large amount of wastewater and waste gas.

[0003] Now, the country emphasizes energy conservation, consumption reduction and sustainable development. Selecting a safe, reliable, economical and efficient vacuum pump is a very important matter. The selection of a dry vacuum pump with front-stage condensation and rear-stage condensation realizes the high recovery of solvents, realizes the secondary recovery and utilization of solvents, and reduces the tail gas treatment pressure. Content of the Utility Model

[0004] Aiming at the above problems, the main purpose of the utility model is to provide a methanol material condensation recovery vacuum system in a chemical industry site, which conducts multiple condensations and recoveries on methanol materials. Through condensation recovery, the tail gas treatment volume is reduced, and the waste gas treatment pressure is effectively reduced.

[0005] The utility model solves the above technical problems through the following scheme: a methanol material condensation recovery vacuum system in a chemical industry site, the methanol material condensation recovery vacuum system in the chemical industry site includes: a front condenser, a front vacuum tank, a dry vacuum pump, a rear condenser, a rear recovery tank, and a reflux catcher.

[0006] The front condenser is connected to the inlet pipeline of the methanol material that needs to be condensed and recovered. The front condenser is connected to a front vacuum tank. Behind the front vacuum tank is connected a dry vacuum pump. Behind the dry vacuum pump is connected a rear condenser. Behind the rear condenser is connected a rear recovery tank into which the condensed material flows. Behind the rear recovery tank is connected a reflux catcher to prevent the secondary volatilization of methanol in the rear recovery tank; at the top of the reflux catcher is provided a treatment pipe for the gas to go to post-treatment.

[0007] In a specific embodiment of the utility model, an inlet filter screen and a pressure transmitter are arranged on the inlet pipeline.

[0008] In a specific embodiment of the utility model, a first liquid level transmitter for real-time monitoring of the liquid level change in the tank body is configured on the front vacuum tank, and a second liquid level transmitter for real-time monitoring of the liquid level change in the tank is configured on the rear recovery tank.

[0009] In a specific embodiment of the present utility model, both the first liquid level transmitter and the second liquid level transmitter are magnetic flap liquid level transmitters.

[0010] In a specific embodiment of the present utility model, the dry vacuum pump is a dry screw vacuum pump.

[0011] In a specific embodiment of the present utility model, the working water pipeline of the dry vacuum pump is equipped with a manual valve.

[0012] In a specific embodiment of the present utility model, a temperature switch, a flow switch, and a frequency converter are configured on the dry vacuum pump.

[0013] In a specific embodiment of the present utility model, a condenser and a pneumatic ball valve are configured on the rear-end recovery tank.

[0014] In a specific embodiment of the present utility model, a metal compensator is provided on the pipeline between the front-end vacuum tank and the dry vacuum pump.

[0015] In a specific embodiment of the present utility model, a metal compensator is provided on the pipeline between the rear-end condenser and the rear-end recovery tank.

[0016] The positive and progressive effects of the present utility model are as follows: Compared with common similar technologies, the methanol material condensation recovery vacuum system provided by the present utility model has the following three main advantages: The structure of the present utility model is compact, with a small floor area, good stability, and is convenient for installation and maintenance; during the vacuum pumping operation, the methanol material is condensed and recovered multiple times. The secondary recovery and utilization of methanol can be realized, the production cost can be reduced, and through condensation recovery, the tail gas treatment volume is reduced, effectively reducing the waste gas treatment pressure. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model (physical diagram).

[0018] Figure 2 It is a schematic diagram of the overall structure of the present utility model (connection relationship diagram between components).

[0019] The following are the names corresponding to the reference numerals in the present utility model:

[0020] Figure 1-2 Among them: front-end condenser 1, front-end vacuum tank 2, dry vacuum pump 3, rear-end condenser 4, rear-end recovery tank 5, reflux catcher 6, inlet pipeline 7, inlet filter 8, first liquid level transmitter 9, second liquid level transmitter 10, metal compensator 11, treatment pipe 12, pressure transmitter 13. Detailed Embodiment

[0021] The following provides a preferred embodiment of the present utility model in conjunction with the accompanying drawings to elaborate in detail on the technical solution of the present utility model.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present utility model (physical diagram), Figure 2 It is a schematic diagram of the overall structure of the present utility model (connection relationship diagram between components), as Figure 1-2 shown: A methanol material condensation recovery vacuum system for a chemical plant proposed by the present utility model. This methanol material condensation recovery vacuum system for a chemical plant includes: a front condenser 1, a front vacuum tank 2, a dry vacuum pump 3, a rear condenser 4, a rear recovery tank 5, and a reflux catcher 6. The front condenser 1 is connected to the inlet pipeline of the methanol material that needs to be condensed and recovered. The front condenser 1 is connected to a front vacuum tank 2. Behind the front vacuum tank 2 is connected a dry vacuum pump 3. Behind the dry vacuum pump 3 is connected a rear condenser 4. Behind the rear condenser 4 is connected a rear recovery tank 5 into which the condensed material flows. Behind the rear recovery tank 5 is connected a reflux catcher 6 to prevent the secondary volatilization of methanol in the rear recovery tank; at the top of the reflux catcher 6 is provided a treatment pipe 12 for the gas to go to post-treatment.

[0023] An inlet filter screen 8 and a pressure transmitter 13 are provided on the inlet pipeline 7 of the present utility model.

[0024] A first liquid level transmitter 9 for real-time monitoring of the liquid level change in the tank body is configured on the front vacuum tank 2 of the present utility model, and a second liquid level transmitter 10 for real-time monitoring of the liquid level change in the tank is configured on the rear recovery tank 5. In the specific implementation process, both the first liquid level transmitter 9 and the second liquid level transmitter 10 are magnetic flap liquid level transmitters.

[0025] The dry vacuum pump 3 of the present utility model can be a dry screw vacuum pump. The working water pipeline of the dry vacuum pump 3 is equipped with a manual valve, and a temperature switch, a flow switch, and a frequency converter are configured on the dry vacuum pump 3. A metal compensator 11 is provided on the pipeline between the front vacuum tank 2 and the dry vacuum pump 3. A metal compensator 11 is provided on the pipeline between the rear condenser 4 and the rear recovery tank 5, and a condenser and a pneumatic ball valve are configured on the rear recovery tank 5.

[0026] In the present utility model, the front condenser 1 of the vacuum tank is connected to the inlet pipeline, and a liquid level transmitter is configured on the vacuum tank 2 to real-time monitor the liquid level change in the tank body. After the methanol is pre-condensed, part of the non-condensable gas is discharged to the rear condenser 4 through the vacuum pump 3, and the condensed material flows into the recovery tank 5. A liquid level transmitter is configured on the recovery tank to real-time monitor the liquid level change in the tank. A reflux catcher 6 is configured at the outlet of the recovery tank to prevent the secondary volatilization of methanol in the recovery tank.

[0027] This utility model can effectively recover methanol materials to a high degree, realizing the secondary utilization or centralized treatment of products. The recovery process flow can be adjusted at any time according to user requirements.

[0028] This utility model is connected to the customer system. In the process section, according to requirements and actual situations, the pre-designed vacuum system parameters are selected in the control cabinet. If the basic material parameters do not exist, the customer can also design the operating parameters by themselves. During the operation of the equipment, the materials enter the front condenser for preliminary cooling of the materials, and part of the condensable gases are condensed and recovered. The condensate enters the pre-positioned buffer tank for material recovery; the non-condensable materials are sucked by the vacuum pump and discharged through the vacuum pump. A condenser is configured at the outlet of the vacuum pump to condense the materials again, and the condensate is centrally treated through the rear recovery tank. A condenser is also configured at the top of the rear recovery tank to condense the volatile materials. The vacuum system uses an electric control system for automatic operation control.

[0029] This utility model has a compact structure, small floor area, good stability, and is convenient for installation and maintenance; during the vacuum suction work, the methanol materials are condensed and recovered multiple times. It can realize the secondary recovery and utilization of methanol, reduce production costs, and through the condensation recovery, the amount of tail gas treatment is reduced, effectively reducing the waste gas treatment pressure.

[0030] The above has shown and described the basic principles, main features and advantages of this utility model. Those skilled in the art of this industry should understand that this utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of this utility model. Without departing from the spirit and scope of this utility model, this utility model will have various changes and improvements, and these changes and improvements all fall within the scope of this utility model claimed. The scope of protection claimed by this utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum system for condensing and recovering methanol materials in a chemical industry, characterized by: The methanol material condensation recovery vacuum system of the chemical site comprises: a front-end condenser, a front-end vacuum tank, a dry vacuum pump, a rear-end condenser, a rear-end recovery tank, and a reflux catcher. The front-end condenser is connected to the inlet pipeline of the methanol material that needs to be condensed and recovered, the front-end condenser is connected to the front-end vacuum tank, the front-end vacuum tank is connected to a dry vacuum pump, the dry vacuum pump is connected to the rear-end condenser, the rear-end condenser is connected to a rear-end recovery tank into which the condensed material flows, and the rear-end recovery tank is connected to a reflux catcher to prevent the methanol in the rear-end recovery tank from secondary volatilization; a gas post-processing treatment pipe is arranged at the top of the reflux catcher.

2. The chemical site methanol material condensation recovery vacuum system according to claim 1, characterized in that: An inlet filter and a pressure transmitter are provided on the inlet pipe.

3. The chemical site methanol material condensation recovery vacuum system according to claim 1, characterized in that: The front-end vacuum tank is equipped with a first liquid level transmitter for real-time monitoring of changes in the liquid level in the tank, and the rear-end recovery tank is equipped with a second liquid level transmitter for real-time monitoring of changes in the liquid level in the tank.

4. The chemical site methanol material condensation recovery vacuum system according to claim 3, characterized in that: The first liquid level transmitter and the second liquid level transmitter are both magnetic flap liquid level transmitters.

5. The chemical site methanol material condensation recovery vacuum system according to claim 1, characterized in that: The dry vacuum pump is a dry screw vacuum pump.

6. The methanol material condensation recovery vacuum system for chemical sites according to claim 1 or 5, characterized in that: The working water pipeline of the dry vacuum pump is equipped with a manual valve.

7. The chemical site methanol material condensation recovery vacuum system according to claim 1, characterized in that: The dry vacuum pump is equipped with a temperature switch, a flow switch and a frequency converter.

8. The chemical site methanol material condensation recovery vacuum system according to claim 1, characterized in that: The rear recovery tank is equipped with a condenser and a pneumatic ball valve.

9. The chemical site methanol material condensation recovery vacuum system according to claim 1, characterized in that: A metal compensator is provided on the pipeline between the front vacuum tank and the dry vacuum pump.

10. The chemical site methanol material condensation recovery vacuum system according to claim 1, characterized in that: A metal compensator is provided on the pipeline between the rear condenser and the rear recovery tank.

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