CN219251688U

CN219251688U - Recovery and separation device for heavy alcohol in EOEG device

Info

Publication number: CN219251688U
Application number: CN202223526225.XU
Authority: CN
Inventors: 刘玉花; 张志恒; 张倩瑜; 李燕
Original assignee: Tianjin Huizhu Hengsheng Technology Co ltd
Current assignee: Tianjin Huizhu Hengsheng Technology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-06-27
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a recovery and separation device for heavy alcohol in an EOEG device, which comprises a dehydration tower, a desalting tower, a centrifuge, a dryer, an MEG tower, a DEG tower and a TEG tower, wherein the dehydration tower is connected with raw material heavy alcohol, the tower top of the dehydration tower is connected with a dehydration tower condenser and a dehydration tower reflux tank through pipelines, and the tower bottom of the dehydration tower is connected with a dehydration tower reboiler and the desalting tower through pipelines; the top of the desalting tower is connected with a desalting tower condenser and a desalting tower buffer tank through pipelines, the desalting tower buffer tank is connected with the MEG tower through pipelines, the tower bottom of the desalting tower is connected with a desalting tower reboiler and a centrifuge through pipelines, and the centrifuge is connected with a dryer through pipelines. According to the utility model, MEG, DEG, TEG and salt in the dangerous waste heavy alcohol can be respectively recovered, qualified waste water is discharged, waste materials are changed into valuable materials, the utilization rate of resources is improved, and the economic benefit of the device is improved.

Description

Recovery and separation device for heavy alcohol in EOEG device

Technical Field

The utility model relates to the technical field of chemical industry, in particular to a recovery and separation device for heavy alcohol in an EOEG device.

Background

In each large EOEG production device adopting SHELL process package, partial heavy alcohol is produced, and the heavy alcohol contains water, glycol, diethylene glycol, triethylene glycol and NAHCO ₃ Salts and heavy components. At present, heavy alcohol is treated outside the commission as dangerous waste by all enterprises. Heavy alcohol is used as dangerous waste, which is treated outside the cost and waste of resources.

Aiming at the problem, more researches are carried out by students at home and abroad in recent years:

patent CN103382069a proposes a method for treating waste liquid of an ethylene glycol recovery device, in which a distillation still is used to perform reduced pressure distillation on heavy alcohol, and alcohol and waste salt are recovered, but the mixed alcohol is not separated.

In the method for preparing cutting fluid by using the heavy alcohol recovery liquid, patent CN106433857A proposes that the silicon mud is diluted and filter-pressed to obtain primary separation liquid; adding a heavy alcohol recovery solution into the primary separation solution, and performing filter pressing to obtain a mixed solution; the mixed solution is subjected to pressure filtration, impurity removal, decoloration, conductivity removal and evaporation to remove water, so that the finished product of the crystal silicon cutting solution is obtained.

Patent CN216223001U, a recovery device for recovering ethylene glycol in heavy alcohol, proposes that the recovery of ethylene glycol in heavy alcohol can be achieved by optimizing the existing device, and the yield of heavy alcohol is reduced.

In the patent CN216536958U, the heavy alcohol recovery device is provided with a bypass connected in series by adopting the quenching liquid absorption pipelines of the two sets of devices, and the heavy alcohol is further recovered and utilized by arranging the heavy alcohol recovery pipeline of the flash tower, so that the emission of the heavy alcohol is reduced.

The above patent reduces the amount of heavy alcohol produced by optimizing the pipeline of the existing apparatus, reduces the discharge of heavy alcohol, but does not thoroughly treat the heavy alcohol produced. Therefore, a recovery and separation device for heavy alcohol in an EOEG plant is proposed to solve the above problems.

Disclosure of Invention

The utility model aims to provide a heavy alcohol recovery and separation device in an EOEG device, which comprises a dehydration tower, a desalting tower, a centrifuge, a dryer, a MEG tower, a DEG tower and a TEG tower, wherein the dehydration tower is connected with raw heavy alcohol, the tower top of the dehydration tower is connected with a dehydration tower condenser and a dehydration tower reflux tank through pipelines, and the tower bottom of the dehydration tower is connected with a dehydration tower reboiler and the desalting tower through pipelines; the tower top of the desalting tower is connected with a desalting tower condenser and a desalting tower buffer tank through pipelines, the desalting tower buffer tank is connected with the MEG tower through pipelines, the tower bottom of the desalting tower is connected with a desalting tower reboiler and a centrifuge through pipelines, and the centrifuge is connected with a dryer through pipelines; the tower top of the MEG tower is connected with a MEG tower condenser and a MEG tower reflux tank through pipelines, and the tower bottom of the MEG tower is connected with a MEG tower reboiler and a DEG tower through pipelines; the tower top of the DEG tower is connected with the DEG tower condenser and the DEG tower reflux tank through pipelines, and the tower bottom of the DEG tower is connected with the DEG tower reboiler and the TEG tower through pipelines; the tower top of the TEG tower is connected with a TEG tower condenser and a TEG tower reflux tank through pipelines, and the tower bottom of the TEG tower is connected with a TEG tower reboiler through pipelines.

Further, the dehydration tower is a vacuum operation tower, and wastewater extracted from the tower top can be discharged or returned to the system for reuse.

Further, the raw heavy alcohol is an alcohol containing water, MEG, DEG, TEG and salt in heavy alcohol or source generated in the EOEG device.

Further, the desalination tower is tower equipment with a tower kettle structure.

Further, the desalination tower is a vacuum operation tower, and the desalination tower reboiler can be combined into an evaporator, and the evaporator is a wiped film evaporator or a falling film evaporator.

Further, the centrifuge and the dryer may be used simultaneously or only one of them may be used.

Furthermore, the MEG tower, the DEG tower and the TEG tower can adopt newly-built equipment, and can also adopt the original MEG tower, DEG tower and TEG tower of the old EOEG device.

Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, MEG, DEG, TEG and salt in the dangerous waste heavy alcohol can be respectively recovered, qualified waste water is discharged, waste materials are changed into valuable materials, the utilization rate of resources is improved, and the economic benefit of the device is improved.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Reference numerals and names in the drawings are as follows:

1-a dehydration tower; 2-a dehydration column condenser; 3-a dehydration tower reflux tank; 4-a dehydration tower reboiler; 5-a desalting tower; 6-a desalination tower condenser; 7-a buffer tank of the desalting tower; 8-a desalination tower reboiler; 9-a centrifuge; 10-a dryer; 11-MEG column; a 12-MEG column condenser; 13-MEG tower reflux drum; a 14-MEG column reboiler; 15-DEG tower; a 16-DEG column condenser; 17-DEG tower reflux drum; 18-DEG column reboiler; a 19-TEG column; a 20-TEG column condenser; a 21-TEG tower reflux drum; 22-TEG column reboiler.

Detailed Description

As shown in figure 1, the recovery and separation device for heavy alcohol in an EOEG device provided by the utility model comprises a dehydration tower 1, a desalting tower 5, a centrifugal machine 9, a dryer 10, an MEG tower 11, a DEG tower 15 and a TEG tower 19, and is characterized in that: the dehydration tower 1 is connected with raw material heavy alcohol, the tower top of the dehydration tower 1 is connected with a dehydration tower condenser 2 and a dehydration tower reflux tank 3 through pipelines, and the tower bottom of the dehydration tower 1 is connected with a dehydration tower reboiler 4 and a desalination tower 5 through pipelines; the top of the desalination tower 5 is connected with a desalination tower condenser 6 and a desalination tower buffer tank 7 through pipelines, the desalination tower buffer tank 7 is connected with an MEG tower 11 through pipelines, the tower bottom of the desalination tower 5 is connected with a desalination tower reboiler 8 and a centrifuge 9 through pipelines, and the centrifuge 9 is connected with a dryer 10 through pipelines; the tower top of the MEG tower 11 is connected with a MEG tower condenser 12 and a MEG tower reflux tank 13 through pipelines, and the tower bottom of the MEG tower 11 is connected with a MEG tower reboiler 14 and a DEG tower 15 through pipelines; the tower top of the DEG tower 15 is connected with a DEG tower condenser 16 and a DEG tower reflux tank 17 through pipelines, and the tower bottom of the DEG tower 15 is connected with a DEG tower reboiler 18 and a TEG tower 19 through pipelines; the tower top of the TEG tower 19 is connected with a TEG tower condenser 20 and a TEG tower reflux tank 21 through pipelines, and the tower bottom of the TEG tower 19 is connected with a TEG tower reboiler 22 through pipelines.

Specifically, the raw material heavy alcohol is heavy alcohol generated in an EOEG device or alcohol containing water, MEG, DEG, TEG and salt in a source.

Specifically, the desalination tower 5 is a tower type device with a tower kettle structure, and the desalination tower 5 and the desalination tower reboiler 8 can be combined into an evaporator, and the evaporator is a wiped film evaporator or a falling film evaporator.

Specifically, the dehydration tower 1 is a vacuum operation tower, and wastewater extracted from the tower top can be discharged or returned to the system for reuse.

Specifically, the centrifuge 9 and the dryer 10 may be used simultaneously, or only one of them may be used.

Specifically, MEG column 11, DEG column 15, and TEG column 19 may be newly built or old EOEG units may be utilized as original MEG column 11, DEG column 15, and TEG column 19.

Working principle:

after heavy alcohol of raw materials enters the dehydration tower 1, qualified wastewater is extracted through a dehydration tower condenser 2 and a dehydration tower reflux tank 3 at the top of the tower, the rest raw materials are sent into a desalting tower 5, solid salt is extracted from the dryer 10 and sold, the rest components are sent into an MEG tower 11, MEG products are extracted through an MEG tower condenser 12 and an MEG tower reflux tank 13 at the top of the MEG tower 11, then sent into a DEG tower 15, the DEG products are extracted through a DEG tower condenser 16 and a DEG tower reflux tank 17 at the top of the DEG tower 15, the rest components are sent into a TEG tower 19, the TEG products are extracted through a TEG tower condenser 20 and a TEG tower reflux tank 21 at the top of the TEG tower 19, and finally, small amounts of heavy components are extracted through a tower kettle of the TEG tower 19, MEG, DEG, TEG and salt in the dangerous waste heavy alcohol are respectively recovered, qualified wastewater is discharged, waste is changed into valuable, and the economic benefit of the device is improved.

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Claims

The utility model provides a recovery separator of heavy alcohol in EOEG device, includes dehydration tower (1), desalination tower (5), centrifuge (9), desicator (10), MEG tower (11), DEG tower (15) and TEG tower (19), its characterized in that: the dehydration tower (1) is connected with raw material heavy alcohol, the top of the dehydration tower (1) is connected with a dehydration tower condenser (2) and a dehydration tower reflux tank (3) through pipelines, and the tower bottom of the dehydration tower (1) is connected with a dehydration tower reboiler (4) and a desalination tower (5) through pipelines; the top of the desalting tower (5) is connected with a desalting tower condenser (6) and a desalting tower buffer tank (7) through pipelines, the desalting tower buffer tank (7) is connected with an MEG tower (11) through pipelines, the tower bottom of the desalting tower (5) is connected with a desalting tower reboiler (8) and a centrifuge (9) through pipelines, and the centrifuge (9) is connected with a dryer (10) through pipelines; the tower top of the MEG tower (11) is connected with a MEG tower condenser (12) and a MEG tower reflux tank (13) through pipelines, and the tower bottom of the MEG tower (11) is connected with a MEG tower reboiler (14) and a DEG tower (15) through pipelines; the tower top of the DEG tower (15) is connected with a DEG tower condenser (16) and a DEG tower reflux tank (17) through pipelines, and the tower bottom of the DEG tower (15) is connected with a DEG tower reboiler (18) and a TEG tower (19) through pipelines; the tower top of the TEG tower (19) is connected with a TEG tower condenser (20) and a TEG tower reflux tank (21) through pipelines, and the tower bottom of the TEG tower (19) is connected with a TEG tower reboiler (22) through pipelines.
2. The recovery separation device of heavy alcohols in an EOEG plant of claim 1, wherein: the raw material heavy alcohol is heavy alcohol generated in an EOEG device or alcohol containing water, MEG, DEG, TEG and salt in a source.
3. The recovery separation device of heavy alcohols in an EOEG plant of claim 1, wherein: the desalting tower (5) is tower equipment with a tower kettle structure.
4. The recovery separation device of heavy alcohols in an EOEG plant of claim 1, wherein: the desalination column (5) and the desalination column reboiler (8) can be combined into an evaporator, which is a wiped or falling film evaporator.