CN-224230781-U - Heat exchange system of reaction unit in coal tar hydrogenation process

CN224230781UCN 224230781 UCN224230781 UCN 224230781UCN-224230781-U

Abstract

The utility model belongs to the technical field of coal tar hydrogenation processes, and relates to a heat exchange system of a reaction unit in a coal tar hydrogenation process, which comprises a heat exchanger, a first feeding pipeline, a second discharging pipeline, a first bypass pipeline and an adjusting component; the utility model relates to a heat exchanger, which comprises a shell side, a first feeding pipeline, a second feeding pipeline, a first bypass pipeline, a regulating component and a heat exchanger, wherein the first feeding pipeline is communicated with the shell side, the second feeding pipeline is communicated with the tube side, the inlet end of a second discharging pipeline is communicated with the outlet end of the tube side, the first bypass pipeline is communicated with the second feeding pipeline, the regulating component is arranged on the second feeding pipeline, when the temperature of a reaction product is higher than that of the reaction feeding, the reaction feeding is preheated through the reaction product in the shell side, when the temperature of the reaction product is lower than that of the reaction feeding, the reaction feeding is prevented from being reversely absorbed in the heat exchanger, and further, more energy consumption is prevented from being consumed for heating the reaction feeding.

Inventors

Bai Ruihu
BAI YUNGANG
GAO PENGFEI
GAO ZHENGANG
HE QIANG
ZHU KAI
WANG SHENGLONG
LI BIN

Assignees

神木富油能源科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (10)

1. The utility model provides a heat transfer system of reaction unit in coal tar hydrogenation, which is characterized in that includes: A heat exchanger (1) having a tube side and a shell side; A first feed line (2), an outlet end of the first feed line (2) being in communication with an inlet end of the shell side; A second feed line (3), the outlet end of the second feed line (3) being in communication with the inlet end of the tube side; The inlet end of the second discharging pipeline (4) is communicated with the outlet end of the tube side; A first bypass line (5), an inlet end of the first bypass line (5) being in communication with the second feed line (3), an outlet end of the first bypass line (5) being in communication with the second discharge line (4); and an adjusting assembly mounted on the second feed line (3), the adjusting assembly being used for adjusting the state of communication between the heat exchanger (1) and the first bypass line (5) and the second feed line (3).
2. The heat exchange system of a reaction unit in a coal tar hydrogenation process according to claim 1, further comprising: And the inlet end of the second bypass pipeline (6) is communicated with the second feeding pipeline (3), and the outlet end of the second bypass pipeline (6) is communicated with the second discharging pipeline (4).
3. The heat exchange system of a reaction unit in a coal tar hydrogenation process according to claim 2, characterized in that the first bypass line (5) is located between the second bypass line (6) and the heat exchanger (1).
4. The heat exchange system of a reaction unit in a coal tar hydrogenation process according to claim 2, characterized in that the flow rate of the second bypass line (6) is larger than the flow rate of the first bypass line (5).
5. The heat exchange system of a reaction unit in a coal tar hydrogenation process according to any one of claims 2-4, wherein the regulating assembly comprises a first regulating valve (7): The first regulating valve (7) is mounted on the second feed line (3), and the first regulating valve (7) is located between the heat exchanger (1) and the first bypass line (5).
6. The heat exchange system of a reaction unit in a coal tar hydrogenation process according to claim 5, wherein the conditioning assembly further comprises: -a second regulating valve (8), said second regulating valve (8) being mounted on said first bypass line (5).
7. The heat exchange system of a reaction unit in a coal tar hydrogenation process according to claim 6, wherein the conditioning assembly further comprises: -a third regulating valve (9), said third regulating valve (9) being mounted on said second bypass line (6).
8. The heat exchange system of a reaction unit in a coal tar hydrogenation process according to claim 6, further comprising: an adjusting pipeline (10), wherein one end of the adjusting pipeline (10) is communicated with the first bypass pipeline (5), and the other end of the adjusting pipeline (10) is communicated with the second discharging pipeline (4); -a thermometer (11), said thermometer (11) being mounted on said regulating line (10) or said first bypass line (5) or said second bypass line (6) or said second discharge line (4).
9. The heat exchange system of a reaction unit in a coal tar hydrogenation process according to claim 8, further comprising: -a pressure gauge (12), said pressure gauge (12) being mounted on said regulating line (10) or said first bypass line (5) or said second bypass line (6) or said second discharge line (4).
10. The heat exchange system of a reaction unit in a coal tar hydrogenation process according to claim 9, further comprising: The temperature indication controller (13), temperature indication controller (13) install in adjusting pipeline (10) or first bypass pipeline (5) or second bypass pipeline (6) or second ejection of compact pipeline (4), just temperature indication controller (13) with second governing valve (8), thermometer (11) and manometer (12) all are electric connection.

Description

Heat exchange system of reaction unit in coal tar hydrogenation process Technical Field The utility model relates to the technical field of coal tar hydrogenation processes, in particular to a heat exchange system of a reaction unit in a coal tar hydrogenation process. Background The heat exchange network of the reaction unit of the coal tar hydrogenation device is a core system for realizing energy recovery and reducing energy consumption. In a coal tar hydrogenation device, a shell-and-tube heat exchanger is used for transferring heat of reaction products (generally high-temperature waste gas from a coal tar hydrogenation process) to low-temperature reaction feeding materials, so that the preheating of the low-temperature reaction feeding materials is realized in an energy-saving and consumption-reducing mode. Specifically, the reaction product is located in the shell side of the shell-and-tube heat exchanger, and the low-temperature reaction feed is located in the tube side of the shell-and-tube heat exchanger, so that the temperature of the reaction feed at the outlet of the tube side reaches the required temperature by utilizing heat exchange between the reaction product and the low-temperature reaction feed. When the reaction unit of the coal tar hydrogenation device normally operates, the temperature of a reaction product is higher than the temperature of low-temperature reaction feeding, and the preheating of the low-temperature reaction feeding can be realized through a shell-and-tube heat exchanger, so that the energy consumption required by the preheating of the low-temperature reaction feeding is saved. However, in actual operation, it is found that, due to the deactivation of the catalyst or improper operation, the temperature of the reaction product is lower than the temperature of the reaction feed, and at this time, the reaction feed is preheated by the reaction product, so that reverse heat exchange occurs between the reaction product and the reaction feed in the heat exchanger, that is, the reaction feed in the tube side is "reversely absorbed" by the reaction product in the shell side, so that the temperature of the reaction feed at the outlet of the tube side is lower, and the reverse heat exchange forces the reaction feed to consume more energy to heat the reaction feed later, thereby causing energy waste. Disclosure of utility model In order to solve the technical problem that in the background technology, reaction feed in a tube side is absorbed in a reverse direction by reaction products in a shell side, so that the temperature of the reaction feed at an outlet of the tube side is lower than a required value, and the reaction feed subsequently needs to consume fuel additionally to maintain the process temperature, the utility model provides a heat exchange system of a reaction unit in a coal tar hydrogenation process. When the temperature of a reaction product is higher than the temperature of reaction feeding, the heat exchange system of the reaction unit in the coal tar hydrogenation process adjusts the second feeding pipeline to be in a communication state with the heat exchanger and the second feeding pipeline to be in a non-communication state with the first bypass pipeline through the adjusting component, and the reaction product in the shell side preheats the reaction feeding; when the temperature of the reaction product is lower than the temperature of the reaction feed, the second feed pipeline is regulated to be in a non-communication state with the heat exchanger through the regulating component, and the second feed pipeline is in a communication state with the first bypass pipeline, so that the condition that the reaction feed is absorbed in a reverse direction when entering the heat exchanger is avoided, the subsequent heating of the reaction feed by consuming more energy is avoided, and further the energy waste is avoided. In order to solve the technical problems, the utility model provides the following technical scheme: A heat exchange system of a reaction unit in a coal tar hydrogenation process comprises a heat exchanger, a first feeding pipeline, a second discharging pipeline, a first bypass pipeline and an adjusting assembly, wherein the heat exchanger is provided with a tube side and a shell side, the outlet end of the first feeding pipeline is communicated with the inlet end of the shell side, the outlet end of the second feeding pipeline is communicated with the inlet end of the tube side, the inlet end of the second discharging pipeline is communicated with the outlet end of the tube side, the inlet end of the first bypass pipeline is communicated with the second feeding pipeline, the outlet end of the first bypass pipeline is communicated with the second discharging pipeline, and the adjusting assembly is mounted on the second feeding pipeline and is used for adjusting the communication state between the heat exchanger and the first bypass pipeline and the se