CN203382686U

CN203382686U - MTP (Methanol To Propylene) and catalytic cracking combination unit

Info

Publication number: CN203382686U
Application number: CN201320414373.4U
Authority: CN
Inventors: 牟庆平; 刘振学; 郭振莲; 侯晓锋
Original assignee: Chambroad Chemical Industry Research Institute Co Ltd
Current assignee: Shandong Chambroad Petrochemicals Co Ltd
Priority date: 2013-07-12
Filing date: 2013-07-12
Publication date: 2014-01-08
Anticipated expiration: 2023-07-12

Abstract

The utility model discloses a MTP (Methanol To Propylene) and catalytic cracking combination unit, and belongs to the technical field of petrochemical product refinement. The MTP and catalytic cracking combination unit comprises a catalytic cracking device and a MTP reaction system, wherein the MTP reaction system comprises a MTP reactor; the catalytic cracking device comprises a catalytic cracking reaction-regeneration system, a catalytic cracking fractionating system and a catalytic cracking absorption-stability system which are sequentially connected to one another through pipelines. The MTP and catalytic cracking combination unit is characterized in that a discharging pipeline of the MTP reactor is connected to an oil-gas separating tank of the catalytic cracking fractionating system, an MTP raw material heat exchanger and an MTP discharging condenser are sequentially arranged on a discharging pipeline of the MTP reactor along a discharging direction, and a high-pressure water pump is connected to the discharging pipeline behind the MTP discharging condenser. The MTP and catalytic cracking combination unit has the advantages that the follow-up treatment is carried out together with the catalytic cracking, fractionation and discharging by connecting the MTP reaction system with the fractionating system of the catalytic cracking device, a separation system of the MTP device can be omitted, and the investment of the MTP device is saved.

Description

A kind of MTP and catalytic cracking combined device

Technical field

The utility model relates to a kind of MTP and catalytic cracking combined device.

Background technology

Catalytic cracking unit is an important refinery device in petrochemical complex, and it mainly comprises reaction-regeneration system, fractionating system, absorption-stable system.A kind of device that preparing propylene from methanol MTP device is the Coal Chemical Industry downstream, it mainly comprises reactive system, separation system, the same with the most of devices of Coal Chemical Industry, the MTP plant investment is huge.

The separation system of MTP device is comparatively similar to the fractionation stabilization system of catalytic cracking unit, the separation column of MTP device reaction discharging simultaneously and catalytic cracking unit ejects material and forms close, the fractionation of catalytic cracking unit and absorption-stable system have 20% design margin simultaneously, for the part refinery, utilize existing catalytic cracking unit coupling MTP device can omit the separation system of MTP device, reduce cost of investment.

Summary of the invention

For the above-mentioned defect existed in prior art, the utility model provides a kind of MTP and catalytic cracking combined device that can greatly reduce refinery's cost of investment.

The technical scheme that the utility model adopts is: a kind of MTP and catalytic cracking combined device, comprise catalytic cracking unit, the MTP reactive system, the MTP reactive system comprises the MTP reactor, catalytic cracking unit comprises the catalytic cracking reaction-regeneration system rapidly be connected successively by pipeline, the catalytic cracking fractionating system, catalytic cracking absorption-stable system, its special character is, the discharging pipeline of MTP reactor is connected with the catch pot of catalytic cracking fractionating system, be provided with successively MTP raw material interchanger along the discharging direction on the discharging pipeline of described MTP reactor, MTP discharging condenser, be connected with high-pressure hydraulic pump on described discharging pipeline after MTP discharging condenser.

Technological process of the present utility model is: after MTP reactive system reaction, flow out material through MTP raw material interchanger and the heat exchange of MTP discharging condenser cooling after, utilize high-pressure hydraulic pump to carry out the water filling supercharging, improve in the catch pot that reaction effluent after pressure enters the catalytic cracking fractionating system and carry out oil, gas, water three phase separation together with catalytic cracking fractionation discharging, the gas phase after separation and oil phase enter catalytic cracking absorption-stable system and carry out subsequent disposal.

In order to prevent that material from flowing backwards, and is provided with check valve on the discharging pipeline of described MTP reactor between high-pressure hydraulic pump and MTP discharging condenser.

The beneficial effects of the utility model are: the utility model is by being connected the MTP reactive system with the fractionating system of catalytic cracking unit, carry out subsequent disposal together with catalytic cracking fractionation discharging, can omit the separation system of MTP device, save the facility investment of MTP device, realized the combination of petrochemical complex and Coal Chemical Industry.Two complete equipments can move simultaneously, but also isolated operation has increased the handiness of operation, can adjust the P/E ratio of refined products by adjusting the MTP product proportion, optimize product structure, and improve product and distribute, and improve the market adaptability of device.

The accompanying drawing explanation

Fig. 1 is MTP and the catalytic cracking combined device principle flow chart in the concrete mode of the utility model;

In figure, 1, FCC raw material fresh feed pump, 2, process furnace, 3, catalytic cracking riser reactor, 4, settling vessel, 5, catalyst regenerator, 6, main air blower, 7, catalytic cracking fractionating tower, 8, reflux pump, 9, reboiler, 10, the fractionation overhead condenser, 11, catch pot, 12, compressor, 13, condenser, 14, the condensation gas tank, 15, the absorption tower fresh feed pump, 16, the catalytic cracking absorption tower, 17, the catalytic cracking desorption tower, 18, the catalytic cracking reabsorber, 19, Fcc Stabilizer, 20, the methanol feeding pump, 21, the dme fresh feed pump, 22, MTP raw material mixing tank, 23, MTP raw material interchanger, 24, MTP discharging condenser, 25, check valve, 26, high-pressure hydraulic pump, 27, the MTP feed exchanger, 28, the MTP reactor, A is catalytic cracking reaction-regeneration system rapidly, B is the catalytic cracking fractionating system, C is catalytic cracking absorption-stable system, D is the MTP reactive system.

Embodiment

Below by embodiment, also by reference to the accompanying drawings the utility model is further described:

As shown in drawings, a kind of MTP and catalytic cracking combined device, comprise the MTP reactive system of catalytic cracking unit and preparing propylene from methanol MTP technique.Catalytic cracking unit adopts prior art, and catalytic cracking unit comprises catalytic cracking reaction-regeneration system rapidly, catalytic cracking fractionating system, the catalytic cracking absorption-stable system set gradually.Catalytic cracking reaction-regeneration system rapidly mainly comprises process furnace 2, catalytic cracking riser reactor 3, settling vessel 4, catalyst regenerator 5, the catalytic cracking fractionating system mainly comprises catalytic cracking fractionating tower 7, is positioned at the catch pot 11 of catalytic cracking fractionating tower 7 tower tops, catalytic cracking absorption-stable system mainly comprises catalytic cracking absorption tower 16, catalytic cracking desorption tower 17, catalytic cracking reabsorber 18, Fcc Stabilizer 19.The discharging pipeline of catalytic cracking subsider 4 is connected with catalytic cracking fractionating tower 7, at the bottom of the tower of catalytic cracking fractionating tower 7, the discharging pipeline is established reflux pump 8 and reboiler 9, the tower top discharging pipeline of catalytic cracking fractionating tower 7 is connected with catch pot 11, the oil phase discharging pipeline of catch pot 11 is connected with catalytic cracking absorption tower 16 by absorption tower fresh feed pump 15, the gas phase discharging pipeline of catch pot 11 passes through compressor 12 successively, condenser 13 is connected with condensation gas tank 14, condensation gas tank 14 is connected with catalytic cracking desorption tower 17 with catalytic cracking absorption tower 16 by pipeline, the tower top discharging pipeline on catalytic cracking absorption tower 16 is connected with catalytic cracking reabsorber 18, catalytic cracking desorption tower 17 is connected with Fcc Stabilizer 19 by pipeline.

The MTP reactive system mainly comprises MTP raw material mixing tank 22, MTP reactor 28, MTP raw material interchanger 23, MTP discharging condenser 24, high-pressure hydraulic pump 26.The discharging pipeline of MTP reactor 28 is connected with the catch pot 11 of catalytic cracking fractionating system, set gradually MTP raw material interchanger 23, MTP discharging condenser 24, check valve 25 on this discharging pipeline, high-pressure hydraulic pump 26 is connected on the described discharging pipeline after check valve 25.

Technological process of the present utility model is:

Catalytic cracking production technique in the utility model adopts existing typical catalytic cracking process.The FCC raw material is squeezed in catalytic cracking riser reactor 3 and is reacted through FCC raw material fresh feed pump 1, reacting rear material through settling vessel 4 by after catalyst sedimentation, reaction oil gas enters in catalytic cracking fractionating tower 7 and carries out fractionation, at the bottom of the separation column tower, liquid phase part is extracted out and the cooling Hou Fen of raw material heat exchange tri-tunnels: separation column is returned on a road, one tunnel enters catalytic cracking riser reactor 3 freshenings, another road is sent outside, catalytic diesel oil is from separation column 7 middle part lateral line withdrawal functions, and top gaseous phase enters in overhead oil gas separating tank 11 after fractionation overhead condenser 10 is cooling.MTP reaction process in the utility model adopts existing typical MTP reaction process process.The MTP reaction raw materials is through MTP raw material mixing tank 22 bufferings, the raw material flowed out from MTP raw material mixing tank 22 enters in MTP reactor 28 and is reacted after heat exchange heats up, after MTP reactor 28 reaction, flow out material through MTP raw material interchanger 23 and 24 heat exchange of MTP discharging condenser cooling after, utilize high-pressure hydraulic pump 26 to carry out the water filling supercharging, material after supercharging is directly delivered in the catch pot 11 of catalytic cracking fractionating system, carry out oil with together with the discharging of catalytic cracking fractionating tower top, gas, the water three phase separation, remove sour water, after in catch pot 11, the compressed machine 12 of isolated gas phase compresses, condenser 13 is cooling enters after condensation gas tank 14 16 bottoms, catalytic cracking absorption tower that enter catalytic cracking absorption-stable system, in catch pot 11, isolated oil phase enters 16 tops, catalytic cracking absorption tower of catalytic cracking absorption-stable system through absorption tower fresh feed pump 15.Material after catalytic

cracking absorption tower

16 and 17 processing of catalytic cracking desorption tower enters respectively catalytic cracking reabsorber 18 and Fcc Stabilizer 19 is processed, and finally makes the products such as gasoline, diesel oil.

Other parts in the utility model adopt known technology, do not repeat them here.

Claims

1. a MTP and catalytic cracking combined device, comprise catalytic cracking unit, the MTP reactive system, the MTP reactive system comprises MTP reactor (28), catalytic cracking unit comprises the catalytic cracking reaction-regeneration system rapidly be connected successively by pipeline, the catalytic cracking fractionating system, catalytic cracking absorption-stable system, it is characterized in that: the discharging pipeline of MTP reactor (28) is connected with the catch pot (11) of catalytic cracking fractionating system, be provided with successively MTP raw material interchanger (23) along the discharging direction on the discharging pipeline of described MTP reactor, MTP discharging condenser (24), be connected with high-pressure hydraulic pump (26) on described discharging pipeline after MTP discharging condenser (24).

2. MTP according to claim 1 and catalytic cracking combined device, is characterized in that: on the discharging pipeline of described MTP reactor, between high-pressure hydraulic pump (26) and MTP discharging condenser (24), be provided with check valve (25).