CN218793882U

CN218793882U - Propylene rectifying tower reboiler

Info

Publication number: CN218793882U
Application number: CN202320085527.3U
Authority: CN
Inventors: 刘康三; 郭南京; 于晴晴; 范红岩; 刘真真
Original assignee: Zhonghai Dongying Petrochemical Co Ltd
Current assignee: Zhonghai Dongying Petrochemical Co Ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-04-07
Anticipated expiration: 2033-01-30

Abstract

The utility model relates to a propylene rectifier unit field, concretely relates to propylene rectifying column reboiler, including heat transfer case, flue gas pipe, communicating pipe and spark plug, the heat transfer case is horizontally three-layer heat conduction box structure and including outer well interior nested tobacco pipe heat transfer chamber, propylene heat transfer chamber and the burning chamber in proper order, the flue gas pipe set up in tobacco pipe heat transfer intracavity and by the oily nothing of heat transfer, communicating pipe be cruciform structure and set up in the rear portion of heat transfer case, the outer end of communicating pipe with flue gas pipe intercommunication and center with burning chamber intercommunication, the inside in burning chamber is provided with the spark plug, propylene entry and propylene export with propylene heat transfer chamber intercommunication, this device can realize inside and outside dual heating through the structure of the three-layer that sets up the heat transfer case, has realized outside heat preservation on the one hand, has reduced thermal scattering and disappearing, has improved the efficiency of heat transfer, and on the other hand realizes the heating from inside and outside two directions, has guaranteed the heating effect of propylene.

Description

Reboiler of propylene rectifying tower

Technical Field

The utility model relates to a propylene rectifier unit field, concretely relates to propylene rectifying column reboiler.

Background

The reboiler is a device that heats up liquid industrial chemicals to make the raw materials take place gas-liquid separation because of the intensification, the backward flow is gone into the rectifying column and is rectified, and common reboiler has kettle reboiler, built-in reboiler and horizontal thermosiphon reboiler, but the reboiler of these modes receives the restriction of liquid boiling point to be difficult to rise to the temperature more than 300, so need design a reboiler that uses waste gas burning heating industrial chemicals.

The application number 202222115047.5 discloses a reboiler of a high-efficiency propylene rectifying tower, which comprises a heat conduction box, a combustion chamber and a serpentine heat conduction pipe, wherein the combustion chamber is fixedly arranged on the heat conduction box, and the serpentine heat conduction pipe is fixedly arranged in the heat conduction box; wherein, the heat conduction case includes the box, fixed mounting has the cylindricality heat pipe in the box, the one end of cylindricality heat pipe stretches out box and fixed mounting has the mouth that connects heat, the one side fixed mounting who connects the mouth dorsad on the box has fixed case, and the device is through setting up the combustion chamber with heat transfer for the heat pipe, utilizes the waste heat of flue gas to heat the heat pipe simultaneously, can realize dual utilization, and this kind of heat conduction mode heating position is comparatively limited, and is lower to the heating efficiency of heat pipe, and secondary heat conduction efficiency through the flue gas is also not high, has a large amount of heat extravagant.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a propylene rectifying column reboiler to the heat exchange efficiency low that prior art exists, can't carry out the defect of fully heating to propylene.

The technical scheme of the utility model is that:

the utility model provides a propylene rectifying column reboiler, includes heat transfer case, flue gas pipe, communicating pipe and spark plug, the heat transfer case is horizontally three-layer heat conduction box structure and including outer in nested tobacco pipe heat transfer chamber, propylene heat transfer chamber and burning chamber in proper order, the flue gas pipe set up in tobacco pipe heat transfer intracavity and by the oily disappearance of heat transfer, communicating pipe be cruciform structure and set up in the rear portion of heat transfer case, the outer end of communicating pipe with flue gas pipe intercommunication and center with burning chamber intercommunication, the inside in burning chamber is provided with the spark plug, propylene entry and propylene export with propylene heat transfer chamber intercommunication.

Preferably, a plurality of partition plates which are axially and circumferentially arranged are arranged in the propylene heat exchange cavity, the front ends of the partition plates are connected with the inner wall of the front end of the heat exchange box, and an overflowing gap is reserved between the rear ends of the partition plates and the inner wall of the rear end of the heat exchange box.

Preferably, a fin plate parallel to the partition plate is further arranged in the propylene heat exchange cavity.

Preferably, the propylene inlet and the propylene outlet are arranged at intervals and connected with the front part of the heat exchange box in a circumferential arrangement mode, and both the propylene inlet and the propylene outlet are communicated with the propylene heat exchange cavity.

Preferably, the rear part of the heat exchange box is provided with a rear cover, the rear cover is detachably connected with the heat exchange box, and a sealing ring is filled at the joint of the rear cover and the heat exchange box.

Preferably, the outer side inner wall of the smoke tube heat exchange cavity is coated with a heat insulation layer, and the inner wall of the propylene heat exchange cavity is coated with a heat conduction ceramic coating.

Compared with the prior art, the utility model, have following advantage:

this device can realize inside and outside dual heating through the structure of the three-layer that sets up the heat transfer case, has realized outside heat preservation on the one hand, has reduced thermal scattering and disappearing, has improved the efficiency of heat transfer, and on the other hand realizes the heating from inside and outside two directions, has guaranteed the heating effect of propylene.

Drawings

FIG. 1 is a schematic structural diagram of the present invention and a flow diagram of propylene and combustion gas;

FIG. 2 is a schematic structural view of the present invention;

in the figure: 1-heat exchange box, 11-smoke tube heat exchange cavity, 12-propylene heat exchange cavity, 13-combustion cavity, 14-separation plate, 15-fin plate, 16-fuel gas inlet, 17-propylene outlet, 18-propylene inlet and 19-fuel gas outlet;

2-a flue gas pipe, 3-a communicating pipe, 4-a spark plug and 5-a rear cover;

a-propene, b-combustion gas.

Detailed Description

In the following description, numerous implementation details are set forth in order to provide a more thorough understanding of the present invention. It should be understood, however, that these implementation details should not be used to limit the invention. That is, in some embodiments of the invention, details of these implementations are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Examples

Referring to fig. 1 and 2, compared with a comparison document, the propylene rectifying tower reboiler adopts a more direct heating mode and a three-layer structure, so that propylene can be heated by an inner layer and an outer layer, the heating efficiency is improved, and the energy waste is reduced. The concrete structure includes heat transfer case 1, flue gas pipe 2, communicating pipe 3 and spark plug 4, heat transfer case 1 is horizontal three-layer heat conduction box structure and including outer well interior nested tobacco pipe heat transfer chamber 11 in proper order, propylene heat transfer chamber 12 and burning chamber 13, flue gas pipe 2 sets up in tobacco pipe heat transfer chamber 11 and by the immersion of heat transfer oil, communicating pipe 3 is the cruciform structure and sets up in heat transfer case 1's rear portion, the outer end and the flue gas pipe 2 intercommunication and the center of communicating pipe 3 and burning chamber 13 intercommunication, the inside of burning chamber 13 is provided with spark plug 4, propylene entry 18 and propylene export 17 and propylene heat transfer chamber 12 intercommunication.

The working principle is as follows:

1. working gas is charged into the combustion chamber 13 and then ignited by the spark plug 4, and the combustion gas generates heat to heat the propylene heat exchange chamber 12.

2. The burning gas enters the smoke tube heat exchange cavity 11 through the communicating tube 3 under the action of expansion and the push of subsequent gas, and the propylene heat exchange cavity 12 is heated from the outside, so that the propylene heat exchange cavity 12 is heated inside and outside, and the energy is fully utilized.

3. When the temperature reaches a proper temperature, the combustion of the combustion chamber 13 is controlled, propylene is introduced into the propylene heat exchange chamber 12, the propylene is fully heated in the flowing process of the propylene heat exchange chamber 12, and then the propylene flows back into the rectifying tower from the propylene outlet 17.

This device can realize inside and outside dual heating through the structure of the three-layer that sets up heat exchange box 1, has realized outside heat preservation on the one hand, has reduced thermal scattering and disappearing, has improved the efficiency of heat transfer, and on the other hand realizes the heating from inside and outside two directions, has guaranteed the heating effect of propylene.

Examples

Referring to fig. 1 and 2, the same as the first embodiment, except that a plurality of partition plates 14 are disposed axially and circumferentially in the propylene heat exchange chamber 12, the front ends of the partition plates 14 are connected to the inner wall of the front end of the heat exchange box 1, and the rear ends of the partition plates and the inner wall of the rear end of the heat exchange box 1 are provided with an overflow gap. The partition plate 14 is provided to form a reciprocating flow passage, thereby improving the heat exchange efficiency of propylene.

The propylene heat exchange cavity 12 is also internally provided with a fin plate 15 parallel to the partition plate 14, and the fin plate 15 is also arranged to ensure the heat exchange efficiency of propylene.

The propylene inlet 18 and the propylene outlet 17 are arranged at intervals and are connected with the front part of the heat exchange box 1 in a circumferential arrangement mode, and the propylene inlet 18 and the propylene outlet 17 are both communicated with the propylene heat exchange cavity 12.

Examples

Referring to fig. 1 and 2, the second embodiment is substantially the same, except that a rear cover 5 is disposed at the rear of the heat exchange box 1, the rear cover 5 is detachably connected to the heat exchange box 1, and a sealing ring is filled at the joint of the rear cover 5 and the heat exchange box 1. The rear cover 5 is arranged for convenient disassembly, so that an operator can conveniently clean the inner coking and the like.

The front part of the heat exchange box 1 is provided with a fuel gas inlet 16 and a fuel gas outlet 19, the fuel gas inlet 16 is positioned at the center of the heat exchange box 1, and the fuel gas outlet 19 is arranged at the outer side of the heat exchange box 1.

The outer side inner wall of the smoke tube heat exchange cavity 11 is coated with a heat insulation layer, so that heat loss is avoided, the inner wall of the propylene heat exchange cavity 12 is coated with a heat conduction ceramic coating, the problem of propylene coking can be avoided due to the arrangement of the ceramic coating, and the difficulty of maintenance is reduced.

The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge range of those skilled in the art without departing from the spirit of the present invention, and the changed contents still belong to the protection scope of the present invention.

Claims

1. The utility model provides a propylene rectifying column reboiler, includes heat transfer case, flue gas pipe, communicating pipe and spark plug, its characterized in that, the heat transfer case is horizontally three-layer heat conduction box structure and including outer in nested tobacco pipe heat transfer chamber, propylene heat transfer chamber and burning chamber in proper order, the flue gas pipe set up in tobacco pipe heat transfer intracavity and by the oily nothing of heat transfer, communicating pipe be cruciform structure and set up in the rear portion of heat transfer case, the outer end of communicating pipe with flue gas pipe intercommunication and center with burning chamber intercommunication, the inside of burning chamber is provided with the spark plug, propylene entry and propylene export with propylene heat transfer chamber intercommunication.

2. The propylene rectification column reboiler of claim 1, characterized in that: and a plurality of partition plates which are axially and circumferentially arranged are arranged in the propylene heat exchange cavity, the front ends of the partition plates are connected with the inner wall of the front end of the heat exchange box, and an overflowing gap is reserved between the rear ends of the partition plates and the inner wall of the rear end of the heat exchange box.

3. The propylene rectification column reboiler of claim 2, characterized in that: and a fin plate parallel to the partition plate is also arranged in the propylene heat exchange cavity.

4. The propylene rectification column reboiler of claim 3, characterized in that: the propylene inlet and the propylene outlet are arranged at intervals and are connected with the front part of the heat exchange box in a circumferential arrangement mode, and the propylene inlet and the propylene outlet are communicated with the propylene heat exchange cavity.

5. The propylene rectification column reboiler of claim 4, characterized in that: the rear part of the heat exchange box is provided with a rear cover which is detachably connected with the heat exchange box, and a sealing ring is filled at the joint of the rear cover and the heat exchange box.

6. The propylene rectification column reboiler of claim 5, characterized in that: the outer side inner wall of tobacco pipe heat transfer chamber scribbles the insulating layer, and the inner wall in propylene heat transfer chamber scribbles heat conduction ceramic coating.