CN214654674U - Adsorption tower start-up heating system - Google Patents
Adsorption tower start-up heating system Download PDFInfo
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- CN214654674U CN214654674U CN202023203558.XU CN202023203558U CN214654674U CN 214654674 U CN214654674 U CN 214654674U CN 202023203558 U CN202023203558 U CN 202023203558U CN 214654674 U CN214654674 U CN 214654674U
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Abstract
The utility model relates to a petrochemical technical field specifically is an adsorption tower intensification system of working in operation, including the adsorption tower, top of the tower desorbent inlet line is connected at the adsorption tower top of the tower, bottom of the tower desorbent discharge line is connected at the bottom of the adsorption tower, and circulating line is connected at the bottom of the adsorption tower, and the bottom of the tower material is circulating pump backward flow to the adsorption tower top of the tower at the bottom of the adsorption tower on the circulating line, and bottom of the tower thermal desorption agent inlet line is connected to bottom of the adsorption tower circulating pump entry, and the circulating line at the adsorption tower top of the tower connects top of the tower thermal desorption agent discharge line. The device can flexibly switch between top-in bottom-out of the thermal desorbent and bottom-in top-out of the thermal desorbent according to the temperature difference in the adsorption tower, thereby avoiding the phenomenon that the temperature difference in the adsorption tower is too large and can only stop continuously rising, and further reducing the risk of damaging the adsorbent.
Description
Technical Field
The utility model relates to a petrochemical technical field specifically is an adsorption tower intensification system of starting to work.
Background
When the adsorption tower of the adsorption unit of the aromatic hydrocarbon factory is started, the adsorption tower is in a state of normal temperature of 30 ℃, a circulating pump needs to be started when the temperature is raised to 80 ℃, and the adsorption tower is started sequentially when the temperature is raised to 150 ℃. In the process, a thermal desorbent is generally used for heating the adsorption tower, but in the process of heating to 80 ℃ at 30 ℃, the temperature difference inside the adsorption tower is strictly controlled to be less than 15 ℃, the temperature difference between the thermal desorbent and the adsorption tower is less than 25 ℃ and the heating rate is 10 ℃/h due to low temperature and low flow rate, so that the adsorbent is prevented from being damaged. However, under the influence of various factors, the temperature difference in the adsorption tower exceeds 15 ℃, the temperature can only be stopped to be continuously raised, the temperature is raised again after the temperature in the adsorption tower is balanced, the construction period is seriously influenced, and meanwhile, the risk of damaging the adsorbent due to large temperature difference exists.
SUMMERY OF THE UTILITY MODEL
In view of prior art's defect, the utility model provides an adsorption tower intensification system of starting work, it can advance to go out and advance to switch between ejecting at the bottom of thermal desorption agent top according to the difference in temperature in the adsorption tower at the bottom of thermal desorption agent advances to avoid the difference in temperature too big in the adsorption tower, can only stop the phenomenon that continues intensification, further reduce and damage the adsorbent risk.
In order to reach above-mentioned purpose, the utility model provides a technical scheme is an adsorption tower intensification system of starting to work, it includes the adsorption tower, adsorption tower top of the tower connects top of the tower desorbent inlet line, bottom of the adsorption tower bottom of the tower desorbent outlet line, connect circulating line at the bottom of the adsorption tower bottom of the tower, the material flows back to the adsorption tower top of the tower at the bottom of the tower circulating pump on the circulating line, bottom of the tower thermal desorption agent inlet line is connected to bottom of the adsorption tower circulating pump entry, the circulating line connection top of the tower thermal desorption agent outlet line at the top of the adsorption tower.
Furthermore, two or more temperature sensors are arranged from the top to the bottom of the adsorption tower.
Furthermore, a first valve and a second valve are arranged on a pipe section between the bottom of the adsorption tower and a feeding pipeline of the thermal desorbent at the bottom of the tower on the circulating pipeline; and a third valve is arranged on a pipe section from the outlet of the circulating pump at the bottom of the adsorption tower to the top of the adsorption tower on the circulating pipeline.
Furthermore, a fourth valve and a fifth valve are arranged on the feeding pipeline of the tower bottom thermal desorption agent.
Furthermore, the fourth valve is a gate valve, and the fifth valve is a plunger valve.
Furthermore, a top desorbent feed pipeline valve is arranged on the top desorbent feed pipeline, and a bottom desorbent discharge pipeline valve is arranged on the bottom desorbent discharge pipeline.
Furthermore, a valve of a tower top thermal desorbent discharge pipeline is arranged on the tower top thermal desorbent discharge pipeline.
Furthermore, the two adsorption towers comprise a first adsorption tower and a second adsorption tower, a first circulation pipeline connected to the bottom of the first adsorption tower is connected to the top of the second adsorption tower, and a second circulation pipeline connected to the bottom of the second adsorption tower is connected to the top of the first adsorption tower; and a cross line is arranged between the first circulating pipeline and the second circulating pipeline, the cross line is connected to an inlet of a cross line circulating pump, and an outlet of the cross line circulating pump is respectively connected to the downstream of the adsorption tower bottom circulating pump of the first circulating pipeline and the downstream of the adsorption tower bottom circulating pump of the second circulating pipeline.
On the other hand, the utility model provides an arene cold adsorption tower start-up intensification method, as follows:
the thermal desorption agent enters the adsorption tower from the top of the adsorption tower, and is discharged from the bottom of the adsorption tower through the adsorption tower, so that the temperature rise is completed by the top entering and the bottom exiting; when the temperature difference in the adsorption tower reaches 15 ℃ in the temperature rise process of the adsorption tower, closing a top-in bottom-out temperature rise process; the thermal desorption agent enters the adsorption tower from a tower bottom thermal desorption agent feeding pipeline, is discharged from a tower top thermal desorption agent discharging pipeline through the adsorption tower, finishes bottom feeding and ejection heating, has small flow, is limited according to the liquid filling flow of the adsorption tower, and is not higher than 166m3H; and after the temperature in the adsorption tower is balanced, the top-in bottom-out flow is recovered, and the bottom-in top-out flow is closed.
Furthermore, the utility model provides an adopt above-mentioned arene cold adsorption tower to start operating intensification system's operation method, its concrete step is:
step 1: opening a valve of the top desorbent feed line on the top desorbent feed line, opening the columnA bottom desorbent discharge pipeline valve is arranged on the bottom desorbent discharge pipeline and is pushed into the top and discharged from the bottom; flow Desorption agent flow 400m3H, extract 200m3H, the pressure of the raffinate is controlled to be 0.9MPa, and the flow is about 200m3/h；
Step 2: when the temperature difference in the adsorption tower reaches 15 ℃ in the temperature rise process of the adsorption tower, firstly reducing the flow: flow Desorption agent flow 200m3H, 100m of extract3H, the pressure of the raffinate is controlled to be 0.9MPa, and the flow is about 100m3/h；
And step 3: opening a first valve and a second valve arranged on a pipe section between the bottom of the adsorption tower and a tower bottom thermal desorption agent feeding pipeline on the circulating pipeline, opening a fourth valve arranged on the tower bottom thermal desorption agent feeding pipeline, then adjusting the flow rate through a fifth valve, opening a tower top thermal desorption agent discharging pipeline valve on a tower top thermal desorption agent discharging pipeline after the pressure of the adsorption tower rises, then closing the tower top desorption agent feeding pipeline valve on the tower top desorption agent feeding pipeline, and closing the tower bottom desorption agent discharging pipeline valve arranged on the tower bottom desorption agent discharging pipeline to realize low-flow bottom-in and bottom-out temperature rise;
and 4, step 4: and finally, after the temperature in the tower is observed to be balanced, the top-in bottom-out flow in the step 1 is recovered, and the bottom-in top-out flow is closed.
The utility model has the advantages that: the device can flexibly switch between top-in bottom-out of the thermal desorbent and bottom-in top-out of the thermal desorbent according to the temperature difference in the adsorption tower, thereby avoiding the phenomenon that the temperature difference in the adsorption tower is too large and can only stop continuously rising, and further reducing the risk of damaging the adsorbent.
Drawings
FIG. 1 is a process flow diagram of the present invention;
in the figure: 1. the tower comprises an adsorption tower, 2, a tower top desorbent feeding pipeline, 2.1, a tower top desorbent feeding pipeline valve, 3, a tower bottom desorbent discharging pipeline, 3.1, a tower bottom desorbent discharging pipeline valve, 4, a circulation pipeline, 4.1, a first valve, 4.2, a second valve, 4.3, a third valve, 5, a tower bottom thermal desorbent feeding pipeline, 5.1, a fourth valve, 5.2, a fifth valve, 6, a thermal desorbent discharging pipeline, 6.1, a tower top thermal desorbent discharging pipeline valve, 7, a temperature sensor, 8, an adsorption tower bottom circulating pump, 9, a cross-line, 10 and a cross-line circulating pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides an adsorption tower heats up system of starting to work, it includes adsorption tower 1, 1 top of the tower of adsorption tower connects top of the tower desorbent charge-in line 2, 1 bottom of the tower bottom of adsorption tower connects bottom of the tower desorbent discharging line 3, 1 bottom of the tower connect circulation pipeline 4 of adsorption tower, the material flows back to 1 top of the tower of adsorption tower through adsorption tower bottom circulating pump 8 on circulation pipeline 4 at the bottom of the tower, thermal desorption agent charge-in line 5 is connected to 8 entrances at the bottom of the adsorption tower, the circulation pipeline 4 connection top of the tower thermal desorption agent discharging line 6 at 1 top of the tower of adsorption tower.
Furthermore, two or more temperature sensors 7 are arranged from the top to the bottom of the adsorption tower 1.
Further, a first valve 4.1 and a second valve 4.2 are arranged on a pipe section between the bottom of the adsorption tower 1 and a feeding pipeline 5 of the thermal desorbent at the bottom of the tower on the circulating pipeline 4; and a third valve 4.3 is arranged on a pipe section from the outlet of the circulating pump 8 at the bottom of the adsorption tower to the top of the adsorption tower on the circulating pipeline 4.
Further, a fourth valve 5.1 and a fifth valve 5.2 are arranged on the tower bottom thermal desorption agent feeding pipeline 5.
Further, the fourth valve 5.1 is a gate valve, and the fifth valve 5.2 is a plunger valve.
Further, an overhead desorbent feed line valve 2.1 is arranged on the overhead desorbent feed line 2, and a bottom desorbent discharge line valve 3.1 is arranged on the bottom desorbent discharge line 3.
Further, a tower top thermal desorption agent discharge pipeline valve 6.1 is arranged on the tower top thermal desorption agent discharge pipeline 6.
Furthermore, the adsorption towers 1 are provided with two adsorption towers, and each adsorption tower comprises a first adsorption tower and a second adsorption tower, a first circulation pipeline connected to the bottom of each first adsorption tower is connected to the top of each second adsorption tower, and a second circulation pipeline connected to the bottom of each second adsorption tower is connected to the top of each first adsorption tower; an overline 9 is arranged between the first circulation pipeline and the second circulation pipeline, the overline 9 is connected to an inlet of an overline circulating pump 10, and an outlet of the overline circulating pump 10 is respectively connected to the downstream of an adsorption tower bottom circulating pump of the first circulation pipeline and the downstream of an adsorption tower bottom circulating pump of the second circulation pipeline.
On the other hand, the utility model provides an arene cold adsorption tower start-up intensification method, as follows:
the thermal desorption agent enters the adsorption tower 1 from the top of the adsorption tower 1, and is discharged from the bottom of the adsorption tower 1 through the adsorption tower 1, so that the temperature rise is completed by top-in-bottom-out; when the temperature difference in the adsorption tower 1 reaches 15 ℃ in the temperature rising process, closing the top-in bottom-out temperature rising process; the thermal desorbent enters the adsorption tower from a tower bottom thermal desorbent feeding pipeline 5, and is discharged from a tower top thermal desorbent discharging pipeline 6 through the adsorption tower, so that bottom feeding, ejection and temperature rise are completed; and after the temperature in the adsorption tower is balanced, the top-in bottom-out flow is recovered, and the bottom-in top-out flow is closed.
Furthermore, the utility model provides an adopt above-mentioned arene cold adsorption tower to start operating intensification system's operation method, its concrete step is:
step 1: opening a top desorbent feed line valve on a top desorbent feed line 2, opening a bottom desorbent discharge line valve 3.1 (bottom raffinate is opened and extract is opened) arranged on a bottom desorbent discharge line 3, wherein materials in extract and raffinate lines are mixed materials of desorbent and C8A, and top feeding and bottom discharging; flow Desorption agent flow 400m3H, extract 200m3H, the pressure of the raffinate is controlled to be 0.9MPa, and the flow is about 200m3/h；
Step 2: when the temperature difference in the adsorption tower reaches 15 ℃ in the temperature rise process of the adsorption tower (the temperature difference between the temperature sensor at the top of the first adsorption tower and the temperature sensor at the bottom of the adsorption tower; the temperature at the top of the second adsorption towerTemperature difference between the temperature sensor and the bottom of the adsorption tower), then the flow is firstly reduced: flow Desorption agent flow 200m3H, 100m of extract3H, the pressure of the raffinate is controlled to be 0.9MPa, and the flow is about 100m3/h；
And step 3: opening a first valve 4.1 and a second valve 4.2 arranged on a pipe section between the bottom of the adsorption tower and a bottom thermal desorbent feeding pipeline on the circulating pipeline, opening a fourth valve 5.1 arranged on the bottom thermal desorbent feeding pipeline 5, then adjusting the flow rate through a fifth valve 5.2, opening a top thermal desorbent discharging pipeline valve 6.1 on a top thermal desorbent discharging pipeline 6 after the pressure of the adsorption tower 1 rises, then closing the top desorbent feeding pipeline valve 2.1 on the top thermal desorbent feeding pipeline 2, closing a bottom desorbent discharging pipeline valve 3.1 arranged on a bottom desorbent discharging pipeline 3, and realizing the bottom feeding and ejecting temperature rise under the low flow;
and 4, step 4: and finally, after the temperature in the tower is observed to be balanced, the top-in bottom-out flow in the step 1 is recovered, and the bottom-in top-out flow is closed.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an adsorption tower intensification system of starting to operate which characterized in that: the tower bottom thermal desorption device comprises an adsorption tower, wherein a top desorption agent feed pipeline is connected to the top of the adsorption tower, a bottom desorption agent discharge pipeline is connected to the bottom of the adsorption tower, a bottom circulation pipeline is connected to the bottom of the adsorption tower, a tower bottom material flows back to the top of the adsorption tower through a bottom circulation pump of the adsorption tower on the circulation pipeline, a bottom thermal desorption agent feed pipeline is connected to an inlet of a bottom circulation pump of the adsorption tower, and a circulation pipeline at the top of the adsorption tower is connected with a top thermal desorption agent discharge pipeline.
2. The system for raising temperature of the adsorption tower during the start-up of the adsorption tower according to claim 1, wherein: two or more temperature sensors are arranged from the top to the bottom of the adsorption tower.
3. The system for raising temperature of the adsorption tower during the start-up of the adsorption tower according to claim 1, wherein: a first valve and a second valve are arranged on a pipe section between the bottom of the adsorption tower and a feeding pipeline of the thermal desorbent at the bottom of the tower on the circulating pipeline; and a third valve is arranged on a pipe section from the outlet of the circulating pump at the bottom of the adsorption tower to the top of the adsorption tower on the circulating pipeline.
4. The system for raising temperature of the adsorption tower during the start-up of the adsorption tower according to claim 1, wherein: and a fourth valve and a fifth valve are arranged on the tower bottom thermal desorption agent feed pipeline.
5. The system for raising temperature of the adsorption tower during the start-up of the adsorption tower according to claim 4, wherein: the fourth valve is a gate valve, and the fifth valve is a plunger valve.
6. The system for raising temperature of the adsorption tower during the start-up of the adsorption tower according to claim 1, wherein: and a valve of the tower top thermal desorption agent discharge pipeline is arranged on the tower top thermal desorption agent discharge pipeline.
7. The system for raising temperature of the adsorption tower during the start-up of the adsorption tower according to claim 1, wherein: the adsorption tower comprises two adsorption towers and a second adsorption tower, wherein a first circulation pipeline connected to the bottom of the first adsorption tower is connected to the top of the second adsorption tower, and a second circulation pipeline connected to the bottom of the second adsorption tower is connected to the top of the first adsorption tower; and a cross line is arranged between the first circulating pipeline and the second circulating pipeline, the cross line is connected to an inlet of a cross line circulating pump, and an outlet of the cross line circulating pump is respectively connected to the downstream of the adsorption tower bottom circulating pump of the first circulating pipeline and the downstream of the adsorption tower bottom circulating pump of the second circulating pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023203558.XU CN214654674U (en) | 2020-12-28 | 2020-12-28 | Adsorption tower start-up heating system |
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| CN202023203558.XU CN214654674U (en) | 2020-12-28 | 2020-12-28 | Adsorption tower start-up heating system |
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| CN214654674U true CN214654674U (en) | 2021-11-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112521971A (en) * | 2020-12-28 | 2021-03-19 | 大连福佳·大化石油化工有限公司 | Adsorption tower start-up heating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112521971A (en) * | 2020-12-28 | 2021-03-19 | 大连福佳·大化石油化工有限公司 | Adsorption tower start-up heating system |
| CN112521971B (en) * | 2020-12-28 | 2024-02-20 | 大连福佳·大化石油化工有限公司 | Adsorption tower start-up heating system |
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