CN216149068U

CN216149068U - Energy-saving device for producing butanol and octanol

Info

Publication number: CN216149068U
Application number: CN202122219500.2U
Authority: CN
Inventors: 郑铁江; 蒋国强; 卢克; 姜伟伟; 王金芳; 肖春生
Original assignee: Jiangsu Baichuan Gaoke New Material Co ltd; Ningxia Baichuan Technology Co ltd
Current assignee: Jiangsu Baichuan Gaoke New Material Co ltd; Ningxia Baichuan Technology Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-04-01
Anticipated expiration: 2031-09-14

Abstract

The utility model relates to the technical field of energy-saving production, in particular to an energy-saving device for producing butanol and octanol, which comprises an isobutylaldehyde tower, a de-heavy tower, a heat integration reboiler and a reflux tank, wherein a lower pipe box of the heat integration reboiler is connected with the bottom of a tower kettle of the isobutylaldehyde tower through a guide pipe; the upper pipe orifice of the shell pass of the heat integration reboiler is connected with the top of the heavy component removal tower through a pipeline, and the lower pipe orifice of the shell pass of the heat integration reboiler is connected with the reflux tank through a pipeline. The utility model fully collects the heat contained in the top gas of the heavy component removal tower into the heat integration reboiler, greatly reduces the steam consumption of the isobutylaldehyde tower and saves the cooling water consumption of the heavy component removal tower.

Description

Energy-saving device for producing butanol and octanol

Technical Field

The utility model relates to the technical field of energy-saving production, in particular to an energy-saving device for producing butanol and octanol.

Background

At present, n-butyraldehyde and isobutyraldehyde produced by a domestic butanol-octanol device are completely separated and are provided with an isomer tower, an isomer tower kettle is provided with a reboiler, steam is used as a heat source in the tower kettle, and the steam required for separating the n-butyraldehyde and the isobutyraldehyde is provided by the reboiler;

in the hydrogenation working section of the butanol-octanol device, n-butyraldehyde is hydrogenated to generate crude butanol, and two rectifying towers, namely a light removal tower and a heavy removal tower, are arranged to complete the separation work of high-purity n-butanol. The tower kettle of the heavy component removal tower is provided with a reboiler, the tower top is provided with a condenser, the temperature of the gas phase at the tower top is 135-; the original design systems are independent, and the heat of materials is not utilized, so that more equipment, high energy consumption and high investment cost are caused;

in conclusion, the existing butanol and octanol production technology has high steam consumption, high circulating cooling water consumption, high comprehensive energy consumption and high investment cost due to lack of linkage among systems; therefore, a new butanol and octanol technology is urgently needed in the industry, the consumption of steam and circulating water is greatly reduced, energy is saved, consumption is reduced, and the additional value of products is further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defect of excessive consumption of circulating water in the prior art, and provides an energy-saving device for producing butanol and octanol.

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

designing an energy-saving device for producing butanol and octanol, comprising an isobutylaldehyde tower, a heavy component removal tower, a heat integration reboiler and a reflux tank, wherein a lower pipe box of the heat integration reboiler is connected with the bottom of a tower kettle of the isobutylaldehyde tower through a guide pipe, and an upper pipe box of the heat integration reboiler is connected with the middle upper part of the tower kettle of the isobutylaldehyde tower through a pipeline; the upper pipe orifice of the shell pass of the heat integration reboiler is connected with the top of the heavy component removal tower through a pipeline, and the lower pipe orifice of the shell pass of the heat integration reboiler is connected with the reflux tank through a pipeline.

Preferably, the bottom of the column kettle of the isobutylaldehyde column is connected with a isobutylaldehyde column reboiler through a conduit, a lower pipe orifice of a shell pass of the isobutylaldehyde column reboiler is communicated with the bottom of the isobutylaldehyde column, and an upper pipe orifice of the shell pass of the isobutylaldehyde column reboiler is connected with the middle-upper part of the column kettle of the isobutylaldehyde column through a pipeline.

Preferably, the bottom of the tower kettle of the heavy component removal tower is connected with a heavy component removal tower reboiler through a conduit, a shell pass lower pipe orifice of the heavy component removal tower reboiler is communicated with the bottom of the heavy component removal tower, and a shell pass upper pipe orifice of the heavy component removal tower reboiler is connected with the upper part of the heavy component removal tower through a pipeline.

Preferably, the heat integration reboiler comprises a shell, a plurality of heat exchange tubes are fixedly mounted inside the shell, tube pass leading-out tubes and tube pass leading-in tubes are respectively fixedly mounted at two ends of the shell, and outlet ends and inlet ends of the plurality of heat exchange tubes are respectively communicated with the tube pass leading-out tubes and the tube pass leading-in tubes.

Preferably, a plurality of baffle plates are fixedly installed on the inner side of the shell, the baffle plates are distributed along the axial direction of the heat exchange tube in a staggered and equidistant mode, the baffle plates form an S-shaped channel, a shell pass leading-in tube is fixedly installed at one end of the top of the shell, and a shell pass leading-out tube is fixedly installed at the other end of the bottom of the shell.

The energy-saving device for producing the butanol and the octanol provided by the utility model has the beneficial effects that: the heat contained in the top gas of the heavy-ends removal tower in the production process of butanol and octanol is fully collected into the heat integration reboiler, so that the steam dosage of the isobutylaldehyde tower is greatly reduced, and the cooling water dosage of the heavy-ends removal tower is saved.

Drawings

FIG. 1 is a schematic structural diagram I of an energy-saving device for producing butanol and octanol, provided by the utility model;

FIG. 2 is a schematic structural diagram II of an energy-saving device for producing butanol and octanol, which is provided by the utility model;

fig. 3 is a schematic structural diagram of a heat integration reboiler of an energy-saving device for producing butanol and octanol, which is provided by the utility model.

In the figure: the system comprises an isobutyraldehyde tower 1, a heavy component removal tower 2, an isobutyraldehyde tower reboiler 3, a heat integration reboiler 4, a shell 41, a heat exchange tube 42, a tube side outlet tube 43, a tube side inlet tube 44, a shell side inlet tube 45, a shell side outlet tube 46, a baffle plate 47, a heavy component removal tower reboiler 5 and a reflux tank 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1:

referring to fig. 1-2, an energy-saving device for producing butanol and octanol comprises an isobutyraldehyde tower 1, a de-heavy tower 2, a heat integration reboiler 4 and a reflux tank 6, wherein a lower pipe box of the heat integration reboiler 4 is connected with the bottom of a tower kettle of the isobutyraldehyde tower 1 through a guide pipe, and an upper pipe box of the heat integration reboiler 4 is connected with the middle upper part of the tower kettle of the isobutyraldehyde tower 1 through a pipeline; the upper pipe orifice of the shell pass of the heat integration reboiler 4 is connected with the top of the heavy component removal tower 2 through a pipeline, and the lower pipe orifice of the shell pass of the heat integration reboiler 4 is connected with the reflux tank 6 through a pipeline; the gas phase in the heat integration reboiler 4 can exchange heat with butyraldehyde in the tube pass of the heat integration reboiler 4;

the bottom of the tower kettle of the isobutylaldehyde tower 1 is connected with a isobutylaldehyde tower reboiler 3 through a conduit, a lower tube opening of a shell pass of the isobutylaldehyde tower reboiler 3 is communicated with the bottom of the isobutylaldehyde tower 1, and an upper tube opening of the shell pass of the isobutylaldehyde tower reboiler 3 is connected with the middle upper part of the tower kettle of the isobutylaldehyde tower 1 through a pipeline; the bottom of the tower kettle of the heavy component removal tower 2 is connected with a heavy component removal tower reboiler 5 through a guide pipe, the lower tube opening of the shell pass of the heavy component removal tower reboiler 5 is communicated with the bottom of the heavy component removal tower 2, and the upper tube opening of the shell pass of the heavy component removal tower reboiler 5 is connected with the upper part of the heavy component removal tower 2 through a pipeline.

The process flow comprises the following steps: the butyraldehyde at the bottom of the tower kettle in the isobutyraldehyde tower 1 is circulated to the middle upper part of the tower kettle of the isobutyraldehyde tower 1 through a heat exchange pipe of a heat integration reboiler 4 due to a thermal siphon principle, the butyraldehyde in a pipe pass is heated to 100 ℃ from 90 ℃, the butyraldehyde after heat exchange returns to the isobutyraldehyde tower 1, the butyraldehyde in a pipe pass of an overheating integration reboiler 4 is heated to 100 ℃ from 90 ℃, and the butyraldehyde after heat exchange returns to the isobutyraldehyde tower 1; the tower top gas of the heavy component removal tower 2 is conveyed to the shell pass of the heat integration reboiler 4 through a pipeline, the 140 ℃ gas phase of the shell pass of the heat integration reboiler 4 fully exchanges heat with 90 ℃ butyraldehyde of the tube pass of the heat integration reboiler 4, and the shell pass gas phase is condensed to 120 ℃ from 140 ℃ and becomes a liquid phase; in the whole production process of butanol and octanol, heat contained in the top gas of the heavy component removal tower 2 is fully collected into the heat integration reboiler 4, so that the steam consumption of the isobutylaldehyde tower 1 is greatly reduced, and the cooling water consumption of the heavy component removal tower 2 is saved.

Example 2:

referring to fig. 1 to 3, as another preferred embodiment of the present invention, the difference from embodiment 1 is that the heat integration reboiler 4 includes a shell 41, a plurality of heat exchange tubes 42 are fixedly installed inside the shell 41, a tube pass outlet tube 43 and a tube pass inlet tube 44 are respectively fixedly installed at two ends of the shell 41, outlet ends and inlet ends of the plurality of heat exchange tubes 42 are respectively communicated with the tube pass outlet tube 43 and the tube pass inlet tube 44, a plurality of baffle plates 47 are fixedly installed inside the shell 41, the plurality of baffle plates 47 are equidistantly distributed along an axial direction of the heat exchange tubes 42 in a staggered manner, the plurality of baffle plates 47 form an S-shaped channel, a shell pass inlet tube 45 is fixedly installed at one end of the top of the shell 41, and a shell pass outlet tube 46 is fixedly installed at the other end of the bottom of the shell 41.

Inside introducing heat exchange tube 42 with butyraldehyde through the pipe through isobutyl aldehyde tower 1 tower bottom, inside removing heavy tower 2 top through the pipeline with leading-in shell pass inlet tube 45 of high-temperature gas, through the S type passageway that baffling board 47 formed, make high-temperature gas flow path lengthen like this, this just makes the abundant heat transfer of high-temperature gas butyraldehyde to promote heat exchange efficiency greatly.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. An energy-saving device for producing butanol and octanol is characterized by comprising an isobutylaldehyde tower (1), a de-heavy tower (2), a heat integration reboiler (4) and a reflux tank (6), wherein a lower pipe box of the heat integration reboiler (4) is connected with the bottom of a tower kettle of the isobutylaldehyde tower (1) through a guide pipe, and an upper pipe box of the heat integration reboiler (4) is connected with the middle-upper part of the tower kettle of the isobutylaldehyde tower (1) through a pipeline; the upper pipe orifice of the shell pass of the heat integration reboiler (4) is connected with the top of the heavy component removal tower (2) through a pipeline, and the lower pipe orifice of the shell pass of the heat integration reboiler (4) is connected with the reflux tank (6) through a pipeline.

2. The energy-saving device for producing butanol and octanol according to claim 1, wherein the bottom of the column bottom of the isobutyraldehyde column (1) is connected with an isobutyraldehyde column reboiler (3) through a conduit, the lower orifice of the shell pass of the isobutyraldehyde column reboiler (3) is communicated with the bottom of the isobutyraldehyde column (1), and the upper orifice of the shell pass of the isobutyraldehyde column reboiler (3) is connected with the middle-upper part of the column bottom of the isobutyraldehyde column (1) through a pipeline.

3. The energy-saving device for producing butanol and octanol according to claim 1, wherein the bottom of the tower kettle of the de-heavy tower (2) is connected with a de-heavy tower reboiler (5) through a conduit, the lower tube orifice of the shell side of the de-heavy tower reboiler (5) is communicated with the bottom of the de-heavy tower (2), and the upper tube orifice of the shell side of the de-heavy tower reboiler (5) is connected with the upper part of the de-heavy tower (2) through a pipeline.

4. The energy-saving device for producing butanol and octanol according to claim 1, wherein the heat integration reboiler (4) comprises a shell (41), a plurality of heat exchange tubes (42) are fixedly installed inside the shell (41), a tube pass outlet tube (43) and a tube pass inlet tube (44) are respectively and fixedly installed at two ends of the shell (41), and outlet ends and inlet ends of the plurality of heat exchange tubes (42) are respectively communicated with the tube pass outlet tube (43) and the tube pass inlet tube (44).

5. The energy-saving device for producing butanol and octanol according to claim 4, wherein a plurality of baffle plates (47) are fixedly installed on the inner side of the shell (41), a plurality of baffle plates (47) are distributed along the axial direction of the heat exchange tube (42) in a staggered and equidistant manner, a plurality of baffle plates (47) form an S-shaped channel, a shell pass lead-in tube (45) is fixedly installed at one end of the top of the shell (41), and a shell pass lead-out tube (46) is fixedly installed at the other end of the bottom of the shell (41).