CN214735565U - Catalytic slurry oil processing system - Google Patents

Abstract

The utility model discloses a catalysis slurry oil system of processing, processing system includes raw materials buffer tank, decompression charge pump, raw materials heat exchanger, decompression stove, decompression tower, decompression tail oil pump, tail oil heat exchanger at the bottom of the tower, tail oil air cooler at the bottom of the tower, side second line pump, side second line heat exchanger, side second line air cooler, a line of pump of side, a line of air cooler of side, vacuum pumping system, top of the tower sewage pump, top of the tower oil pump etc. wherein the decompression tower is core main part equipment. The utility model discloses a solid content in the device can effective desorption catalysis slurry oil, and whole device can long-term operation simultaneously.

Description

Catalytic slurry oil processing system

Technical Field

The utility model relates to a catalysis slurry oil system of processing.

Background

The catalytic oil slurry is used as a byproduct in the catalytic cracking process, contains a large amount of polycyclic aromatic hydrocarbons, has high utilization value under certain specific conditions due to the composition characteristics, is developed and utilized, improves the additional value, and can bring good economic benefit to enterprises. However, a certain amount of solid particles are carried in the catalytic slurry oil, the solid particles are difficult to remove by conventional means, the solid has great abrasion to equipment, and meanwhile, the quality of downstream products is greatly influenced, so that the development and utilization of the catalytic slurry oil are limited to a great extent.

At present, the solid in the oil slurry is removed by methods such as filtration, extraction and the like, so that the oil slurry is further processed and utilized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a catalysis slurry oil system of processing can effectively get rid of the solid in the catalysis slurry oil to can long period operation.

The purpose of the utility model is realized through the following technical scheme:

a catalytic slurry oil processing system is characterized in that the structure thereof comprises: the system comprises a raw material buffer tank, a reduced-pressure feeding pump, a raw material heat exchanger, a reduced-pressure furnace, a reduced-pressure tower, a reduced-pressure tail oil pump, a tower bottom tail oil heat exchanger, a tower bottom tail oil air cooler, a side second-line pump, a side second-line heat exchanger, a side second-line air cooler, a side first-line pump, a side first-line air cooler, a vacuum pumping system, a tower top sewage pump and a tower top oil pump;

the pressure reducing tower is provided with a tower bottom tail oil return port, a steam inlet, a material inlet, a side second-line cold/hot return port and a side first-line cold/hot return port from bottom to top;

the pressure reducing tower is provided with a tower bottom mining outlet, a side second-line mining outlet, a side first-line mining outlet and a tower top gas phase outlet from bottom to top;

raw oil enters a raw material buffer tank, is subjected to pressure increase by a pressure reduction feed pump, and then enters a pressure reduction tower through a raw material heat exchanger and a pressure reduction furnace through a material inlet;

steam enters the decompression tower through a steam inlet;

the tower bottom extraction outlet is sequentially connected with a pressure reduction tail oil pump, a tower bottom tail oil heat exchanger and a tower bottom tail oil air cooler to discharge pressure reduction tail oil;

the bottom of the pressure reducing tower is provided with a stirring line, a pipeline between the pressure reducing tail oil pump and the tower bottom tail oil heat exchanger is also provided with two branch lines, one branch line is connected with the stirring line through a tower bottom tail oil return port, high pressure reducing tail oil is introduced, and the tower bottom is blown and stirred to avoid the deposition of solid at the tower bottom; the other is connected to the side two-wire heat return port;

a side second-line extraction outlet in the middle of the decompression tower is sequentially connected with a side second-line pump, a side second-line heat exchanger and a side second-line air cooler to discharge refined oil slurry, wherein a pipeline between the side second-line pump and the side second-line heat exchanger is also provided with a branch line connected with a side second-line hot return outlet, and a pipeline between the side second-line heat exchanger and the side second-line air cooler is also provided with a branch line connected with a side second-line cold return outlet;

a side first-line extraction outlet at the upper part of the decompression tower is sequentially connected with a side first-line pump and a side first-line air cooler to discharge diesel oil fraction, wherein a pipeline between the side first-line pump and the side first-line air cooler is also provided with a branch line connected with a side first-line heat return port; the pipeline of the outlet of the side line air cooler is also provided with a branch line connected with a side line cold return port;

and a gas phase outlet at the top of the decompression tower is sequentially connected with a vacuum pumping system, a tower top sewage pump and a tower top oil pump to discharge sewage and tower top oil.

Preferably, the decompression tower is provided with a tower tray section, a flash evaporation section, a herringbone baffle plate and 4 filler sections from bottom to top, and the tower tray section adopts an anti-blocking tower tray; the flash evaporation section is provided with a feeding distributor for separating gas from liquid and redistributing the material; the functions of the 4 filling sections are washing, side two-line middle section reflux, refining and side one-line middle section reflux from bottom to top in sequence, and each filling section is provided with a liquid distributor, a filling material and a liquid collector;

the tail oil return port at the bottom of the tower, steam inlet are located the gas phase space below the tower tray and above the liquid phase space of the tower kettle, the extraction port at the bottom of the tower is located at the bottom of the tower, the material inlet is located the flash evaporation section, the side second-line hot return port is located above the washing filler section, the side second-line cold return port returns to the side second-line middle-section reflux filler section, the side second-line extraction port is located below the side second-line middle-section reflux filler section, the side first-line hot return port is located above the refined filler section, the side first-line cold return port is located above the side first-line middle-section reflux filler section, and the side first-line extraction port is located below the side first-line middle-section reflux filler section.

The utility model discloses beneficial effect as follows:

the utility model discloses a solid content in the device can effective desorption catalysis slurry oil, and whole device can long-term operation simultaneously. The vacuum degree and the temperature are controlled in the process production, so that the coking of the vacuum tower can be slowed down, and the corrosion of solid particles to equipment is reduced; a processing system reduces the solid content in a gas phase by adding a stirring line, a feeding flash distributor, a herringbone baffle and other measures on a pressure reduction tower.

Drawings

Fig. 1 is a schematic structural diagram of the catalytic slurry oil processing system of the present invention. The system comprises a raw material buffer tank 1, a reduced pressure feed pump 2, a raw material heat exchanger 3, a reduced pressure furnace 4, a reduced pressure tower 5, a reduced pressure tail oil pump 6, a tower bottom tail oil heat exchanger 7, a tower bottom tail oil air cooler 8, a side second-line pump 9, a side second-line heat exchanger 10, a side second-line air cooler 11, a side first-line pump 12, a side first-line air cooler 13, a vacuum pumping system 14, a tower top sewage pump 15 and a tower top oil pump 16.

Detailed Description

Example 1

This catalysis slurry oil system of processing, its structure includes: the system comprises a raw material buffer tank 1, a reduced pressure feed pump 2, a first heat exchanger 3, a reduced pressure furnace 4, a reduced pressure tower 5, a reduced pressure tail oil pump 6, a tower bottom tail oil heat exchanger 7, a tower bottom tail oil air cooler 8, a side second-line pump 9, a side second-line heat exchanger 10, a side second-line air cooler 11, a side first-line pump 12, a side first-line air cooler 13, a vacuum pumping system 14, a tower top sewage pump 15 and a tower top oil pump 16, wherein the raw material buffer tank 1, the reduced pressure feed pump 2, the first heat exchanger 3 and the reduced pressure furnace 4 are sequentially connected, the reduced pressure furnace is connected to a material inlet at the bottom of the reduced pressure tower 5, the top of the reduced pressure tower is connected with the vacuum pumping system 6, the top of the reduced pressure tower discharges sulfur-containing sewage through the first vacuum pump 15, the top of the reduced pressure tower discharges reduced pressure oil through the second vacuum pump 16, and a steam inlet is further arranged at the bottom of the reduced pressure tower;

the vacuum tower 5 is provided with a tower bottom tail oil return port 51, a steam inlet 52, a material inlet 53, a side second-line hot return port 54, a side second-line cold return port 55, a side first-line hot return port 56 and a side first-line cold return port 57 from bottom to top;

the pressure reducing tower 5 is provided with a bottom mining outlet 58, a side second-line mining outlet 59, a side first-line mining outlet 60 and a top gas phase outlet 61 from bottom to top;

raw oil enters a raw material buffer tank 1, is subjected to pressure increase by a pressure reduction feed pump 2, and then enters a pressure reduction tower 5 through a raw material heat exchanger 3 and a pressure reduction furnace 4 through a material inlet 53;

steam enters the vacuum tower through steam inlet 52;

the bottom extraction outlet is sequentially connected with a pressure reduction tail oil pump 6, a bottom tail oil heat exchanger 7 and a bottom tail oil air cooler 8 to discharge pressure reduction tail oil;

the bottom of the pressure reducing tower is provided with a stirring line 17, a pipeline between the pressure reducing tail oil pump and the tower bottom tail oil heat exchanger is also provided with two branch lines, one branch line is connected with the stirring line 17 through a tower bottom tail oil return port 51, high-pressure reducing tail oil is introduced, the tower bottom is blown and stirred, and the deposition of solid at the tower bottom is avoided; the other is connected to a side line return port 54;

a side second-line extraction outlet 59 in the middle of the decompression tower is sequentially connected with a side second-line pump 9, a side second-line heat exchanger 10 and a side second-line air cooler 11 to discharge refined slurry oil, wherein a branch line is arranged on a pipeline between the side second-line pump and the side second-line heat exchanger and is connected with a side second-line heat return port 54; and a branch line is arranged on a pipeline between the side two-line heat exchanger and the side two-line air cooler and is connected with a side two-line cold return port 55.

A side first-line extraction outlet 60 in the middle of the decompression tower is sequentially connected with a side first-line pump 12 and a side first-line air cooler 13 to discharge diesel oil fraction, wherein a branch line arranged between the side first-line pump and the side first-line air cooler is also connected with a side first-line heat return port 56; the pipeline of the outlet of the side line air cooler is also provided with a branch line connected with the side line cold return port 57.

And a gas phase outlet at the top of the decompression tower is sequentially connected with a vacuum pumping system 14, a tower top sewage pump 15 and a tower top oil pump 16 to discharge sewage and tower top oil.

Wherein the pressure reducing tower is provided with a tower tray section, a flash evaporation section, a herringbone baffle plate and 4 filler sections from bottom to top, and the tower tray section adopts an anti-blocking tower tray; a feeding distributor is arranged in the flash evaporation section to separate and redistribute gas and liquid of the materials; the functions of the 4 filling sections are washing, side two-line middle section reflux, refining and side one-line middle section reflux from bottom to top in sequence, and each filling section is provided with a liquid distributor, a filling material and a liquid collector;

the tail oil return port at the bottom of the tower, steam inlet are located the gas phase space of tower tray below and tower cauldron liquid phase space top, the outlet is adopted at the bottom of the tower to be located the bottom of the tower, material entry is located the flash distillation section, side second line hot return port is located washing filler section top, side second line cold return port returns side second line middle section backward flow filler section top, the side second line is adopted the outlet and is located side second line middle section backward flow filler section below, a line of hot return port of side is located refined filler section top, a line of cold return port of side is located a line of middle section backward flow filler section top, a line of side is adopted the outlet and is located refined filler section below.

When in use, the catalytic slurry oil (solid content 4.5g/L) and vacuum residue are mixed according to the weight ratio of 1: 0.7, adding the mixture into a raw material buffer tank, adding the mixture to 345 ℃ to 4kPa (A) through a first heat exchanger and a decompression furnace, feeding the mixture into a decompression tower, connecting the top of the decompression tower with a vacuum pumping system 6, controlling the operating pressure of the top of the decompression tower to be 1.5kPa (A) (the initial start-up stage, the load of the device is low, about 60 percent of the normal design load, the vacuum pumping effect is higher than the design value), and controlling the temperature of the top of the tower to be 70 ℃;

a side first-line extraction outlet at the upper part of the decompression tower is sequentially connected with a side first-line pump and a side first-line air cooler to discharge diesel components (distillation range is less than 350 ℃), and the extraction amount accounts for 22% of the catalytic slurry oil;

a side second-line extraction outlet in the middle of the decompression tower is sequentially connected with a side second-line pump, a side second-line heat exchanger and a side second-line air cooler to discharge refined oil slurry, the extraction amount of the refined oil slurry (with the distillation range of 350-450 ℃) accounts for about 45% of the catalytic oil slurry, and the solid content is 0.042 g/L;

and a bottom extraction outlet of the pressure reduction tower is sequentially connected with a pressure reduction tail oil pump, a tower bottom tail oil heat exchanger and a tower bottom tail oil air cooler to discharge pressure reduction tail oil.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims (2)

1. A catalytic slurry oil processing system is characterized in that the structure thereof comprises: the system comprises a raw material buffer tank, a reduced-pressure feeding pump, a raw material heat exchanger, a reduced-pressure furnace, a reduced-pressure tower, a reduced-pressure tail oil pump, a tower bottom tail oil heat exchanger, a tower bottom tail oil air cooler, a side second-line pump, a side second-line heat exchanger, a side second-line air cooler, a side first-line pump, a side first-line air cooler, a vacuum pumping system, a tower top sewage pump and a tower top oil pump;

the pressure reducing tower is provided with a tower bottom tail oil return port, a steam inlet, a material inlet, a side second-line cold/hot return port and a side first-line cold/hot return port from bottom to top;

the pressure reducing tower is provided with a tower bottom mining outlet, a side second-line mining outlet, a side first-line mining outlet and a tower top gas phase outlet from bottom to top;

raw oil enters a raw material buffer tank, is subjected to pressure increase by a pressure reduction feed pump, and then enters a pressure reduction tower through a raw material heat exchanger and a pressure reduction furnace through a material inlet;

steam enters the decompression tower through a steam inlet;

the tower bottom extraction outlet is sequentially connected with a pressure reduction tail oil pump, a tower bottom tail oil heat exchanger and a tower bottom tail oil air cooler to discharge pressure reduction tail oil;

the bottom of the pressure reducing tower is provided with a stirring line, a pipeline between the pressure reducing tail oil pump and the tower bottom tail oil heat exchanger is also provided with two branch lines, one branch line is connected with the stirring line through a bottom tail oil return port, high pressure reducing tail oil is introduced, and the tower bottom is blown and stirred to avoid the deposition of solid at the tower bottom; the other is connected to the side two-wire return port;

a side second-line extraction outlet in the middle of the decompression tower is sequentially connected with a side second-line pump, a side second-line heat exchanger and a side second-line air cooler to discharge refined oil slurry, wherein a pipeline between the side second-line pump and the side second-line heat exchanger is also provided with a branch line connected with a side second-line hot return outlet, and a pipeline between the side second-line heat exchanger and the side second-line air cooler is also provided with a branch line connected with a side second-line cold return outlet;

a side first-line extraction outlet at the upper part of the decompression tower is sequentially connected with a side first-line pump and a side first-line air cooler to discharge diesel oil fraction, wherein a pipeline between the side first-line pump and the side first-line air cooler is also provided with a branch line connected with a side first-line heat return port; the pipeline of the outlet of the side line air cooler is also provided with a branch line connected with a side line cold return port;

and a gas phase outlet at the top of the decompression tower is sequentially connected with a vacuum pumping system, a tower top sewage pump and a tower top oil pump to discharge sewage and tower top oil.

2. The catalytic slurry processing system of claim 1, wherein: the pressure reducing tower is provided with a tower tray section, a flash evaporation section, a herringbone baffle plate and 4 filler sections from bottom to top, and the tower tray section adopts an anti-blocking tower tray; the flash evaporation section is provided with a feeding distributor for separating gas from liquid and redistributing the material; the functions of the 4 filling sections are washing, side two-line middle section reflux, refining and side one-line middle section reflux from bottom to top in sequence, and each filling section is provided with a liquid distributor, a filling material and a liquid collector;

the tail oil return port at the bottom of the tower, steam inlet are located the gas phase space below the tower tray and above the liquid phase space of the tower kettle, the extraction port at the bottom of the tower is located at the bottom of the tower, the material inlet is located the flash evaporation section, the side second-line hot return port is located above the washing filler section, the side second-line cold return port returns to the side second-line middle-section reflux filler section, the side second-line extraction port is located below the side second-line middle-section reflux filler section, the side first-line hot return port is located above the refined filler section, the side first-line cold return port is located above the side first-line middle-section reflux filler section, and the side first-line extraction port is located below the side first-line middle-section reflux filler section.

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