CN106811224B

CN106811224B - Oil product separation equipment and process suitable for tar light oil and wide fraction

Info

Publication number: CN106811224B
Application number: CN201710049625.0A
Authority: CN
Inventors: 李昊阳; 单春华; 姜秋; 贾骞
Original assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Current assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Priority date: 2017-01-23
Filing date: 2017-01-23
Publication date: 2022-06-14
Anticipated expiration: 2037-01-23
Also published as: CN106811224A

Abstract

An oil product separation device and a process suitable for tar light oil and wide fraction, which comprises a tower body, a rectifying tower, a funnel, an inner insertion pipe, an oil phase outlet, a water phase outlet, a feed inlet and a reflux opening, wherein the funnel is arranged in the tower body and divides the tower body into an upper part and a lower part, the upper part is the rectifying tower, and the lower part is an oil-water separation zone; the inner insert pipe is arranged in the oil-water separation zone, the lower end of the inner insert pipe extends to the bottom of the kettle type tower of the oil-water separation zone, and the upper end of the inner insert pipe is connected with an oil phase outlet arranged on the tower body at the upper part of the oil-water separation zone; the water phase outlet is arranged on the tower body below the funnel, and the water phase outlet is higher than the oil phase outlet; the feeding hole is arranged on the tower body above the funnel; the reflux opening is arranged at the top of the rectifying tower. The equipment can complete the oil-water separation task while separating light oil and wide fraction in tar fraction, effectively reduce the diameter of the tower and reduce the load of a condensing cooler at the top of the tower. Oil-water separation and oil product separation are completed through a single device; the occupied land is saved; the operation is simple.

Description

Oil product separation equipment and process suitable for tar light oil and wide fraction

Technical Field

The invention relates to the field of coal tar processing, in particular to oil product separation equipment and process suitable for tar light oil and wide distillate.

Background

The tar is a liquid product generated in the process of dry distillation and gasification of coal, is a black brown viscous liquid with pungent smell, and is a raw material for producing a series of aromatic hydrocarbons, industrial oil and electrode pitch. Tar is a complex mixture of many organic substances with high aromaticity. Tar distillation is a conventional process for the fractionation of tar fractions under commercial conditions. Usually consists of a complete set of chemical unit operations such as heating, evaporation, fractionation, condensation cooling, etc. Various technically reliable distillation process routes are available for different production enterprises for providing products and public and auxiliary media, and products such as tar light oil, phenol oil, naphthalene oil, wash oil, anthracene oil, asphalt and the like are usually obtained.

In the process route selection of tar distillation, heavy components are removed after the tar raw material is distilled, and lighter components enter the next working section in a gas phase mode, which is a common process flow. In the process of separating and purifying the gas phase fraction, because the gas phase temperature entering the tower is higher, a large amount of reflux liquid is needed to carry out reflux temperature reduction on the tower top, the condensation cooling burden of the system is heavier, the gas quantity is larger, and the diameter of the tower is thicker.

Disclosure of Invention

The invention provides oil product separation equipment and a process suitable for tar light fraction, the equipment can complete oil-water separation task while separating light oil and wide fraction in tar fraction, and provides enough ammonia water for rapidly condensing the wide fraction before entering a cooling tower, thereby effectively reducing the diameter of the tower and reducing the load of a condensation cooler at the top of the tower.

In order to achieve the purpose, the invention adopts the following technical scheme:

an oil product separation device suitable for tar light oil and wide fraction comprises a tower body, a rectifying tower, a funnel, an inner insertion pipe, an oil phase outlet, a water phase outlet, a feeding port and a backflow port, wherein the funnel is arranged inside the tower body and divides the tower body into an upper part and a lower part, the upper part is the rectifying tower, and the lower part is an oil-water separation zone; the inner insert pipe is arranged in the oil-water separation zone, the lower end of the inner insert pipe extends to the bottom of a kettle type tower of the oil-water separation zone, and the upper end of the inner insert pipe is connected with an oil phase outlet arranged on a tower body at the upper part of the oil-water separation zone; the water phase outlet is arranged on the tower body below the funnel, and the water phase outlet is higher than the oil phase outlet; the feed inlet is arranged on the tower body above the funnel; the reflux opening is arranged at the top of the rectifying tower.

A process for separating tar light oil and wide fraction by using oil product separation equipment suitable for tar light oil and wide fraction, wherein quenched tar light fraction and water enter a tower body from a feed inlet; the liquid phase entering the tower body directly enters an oil-water separation zone at the lower part through a funnel; the water phase after oil-water separation flows out automatically from the water phase outlet and is used as condensate for rapid condensation; the oil phase sucked from the bottom of the kettle is discharged from an oil phase outlet through an inner insertion pipe;

light components and a small amount of water escape from the top of the rectifying tower, and the purity of the light components is further improved if needed.

Compared with the prior art, the invention has the beneficial effects that:

the equipment can separate oil from water while separating light oil from wide fraction in tar fraction, and provide enough ammonia water for fast condensation of wide fraction before entering into cooling tower, so as to reduce tower diameter and load of condensing cooler on tower top.

The invention completes oil-water separation and oil product separation by single equipment; the occupied land is saved; the operation is simple.

Drawings

FIG. 1 is a schematic view showing the structure of an oil separation apparatus for tar light oil and wide distillate according to the present invention.

In the figure: 1-tower body, 2-water phase outlet, 3-funnel, 4-feed inlet, 5-oil phase outlet, 6-reflux inlet, 7-oil moisture, separation zone, 8-rectifying tower and 9-inner insert tube.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1, an oil separation apparatus suitable for tar light oil and wide distillate comprises a tower body 1, a rectifying tower 8, a funnel 3, an inner insertion pipe 9, an oil phase outlet 5, a water phase outlet 2, a feed inlet 4, and a reflux port 6, wherein the funnel 3 is arranged inside the tower body 1, and divides the tower body 1 into an upper part and a lower part, the upper part is the rectifying tower 8, and the lower part is an oil-water separation zone 7; the inner insert pipe 9 is arranged in the oil-water separation zone 7, the lower end of the inner insert pipe extends to the bottom of the kettle-type tower of the oil-water separation zone 7, and the upper end of the inner insert pipe is connected with the oil phase outlet 5 arranged on the tower body at the upper part of the oil-water separation zone 7; the water phase outlet 2 is arranged on the tower body below the funnel 3, and the water phase outlet 2 is higher than the oil phase outlet 5; the feed inlet 4 is arranged on the tower body above the funnel 3; the reflux port 6 is provided at the top of the rectifying column 8.

The periphery of the upper part of the funnel 3 is hermetically connected with the tower body 1, and the liquid phase directly enters the bottom of the kettle-type tower through the funnel 3. The lower end of the inner insert pipe 9 extends to the bottom layer of the oil phase.

A process for separating tar light oil and wide fractions by using an oil product separation device suitable for the tar light oil and the wide fractions:

1) the quenched tar light fraction and water enter the tower body 1 from the feed inlet 4;

2) the liquid phase entering the tower body 1 directly enters an oil-water separation zone 7 at the lower part through a funnel 3;

3) the water phase after oil-water separation flows out automatically from the water phase outlet 2 as condensate for rapid condensation;

4) the oil phase sucked from the bottom of the kettle is discharged from the oil phase outlet 5 through the inner insertion pipe 9;

5) the light component and a small amount of water escape from the top of the rectifying tower 8, and if the purity of the light component needs to be further improved, the condensed and cooled light component can be used as reflux to return to the tower body 1 from the reflux port 6;

6) when part of light components return to the tower body 1 as reflux, the rest heavy components enter the lower oil-water separation zone 7 through the funnel 3 after being in countercurrent contact with the gas phase.

Claims

1. An oil product separation device suitable for tar light oil and wide distillate is characterized by comprising a tower body, a rectifying tower, a funnel, an inner insertion pipe, an oil phase outlet, a water phase outlet, a feed inlet and a reflux opening, wherein the funnel is arranged inside the tower body and divides the tower body into an upper part and a lower part, the upper part is the rectifying tower, and the lower part is an oil-water separation zone; the inner insert pipe is arranged in the oil-water separation zone, the lower end of the inner insert pipe extends to the bottom of a kettle type tower of the oil-water separation zone, and the upper end of the inner insert pipe is connected with an oil phase outlet arranged on a tower body at the upper part of the oil-water separation zone; the water phase outlet is arranged on the tower body below the funnel, and the water phase outlet is higher than the oil phase outlet; the feed inlet is arranged on the tower body above the funnel; the reflux port is arranged at the top of the rectifying tower;

the process is suitable for the oil product separation equipment of tar light oil and wide fraction to separate the tar light oil and the wide fraction, and the quenched tar light fraction and water enter a tower body from a feed inlet; the liquid phase entering the tower body directly enters an oil-water separation zone at the lower part through a funnel; the water phase after oil-water separation flows out automatically from the water phase outlet and is used as condensate for rapid condensation; the oil phase sucked from the bottom of the kettle is discharged from an oil phase outlet through an inner insertion pipe; light components and a small amount of water escape from the top of the rectifying tower.