Mixed gas heating system

Abstract

The utility model discloses a mixed gas heating system. The mixed gas heating system comprises a mixed gas input end, a foreground converter and a preheater, the preheater is arranged between the mixed gas input end and the foreground converter in parallel; a heater is further arranged between the mixed gas input end and the foreground converter, and the heater is connected with the preheater in series. The mixed gas is heated through the series heater, so that the working stability and reliability of the foreground converter can be effectively improved, the risk of pipeline corrosion damage is reduced, and the operation reliability of the mixed gas heating system is improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical industry technology, specifically to a mixed gas heating system. Background Technology

[0002] Current mixed gas heating systems cool the acetylene and hydrogen chloride mixture in a cooler, dehydrate it in a demister, and preheat it in a preheater before it enters a converter for the synthesis reaction. Generally, 97°C hot water is circulated in the converter, and the mixture is heated by the preheater so that the mixture can reach between 80°C and 85°C at the preheater output. During the conversion process, the mixture passes through multiple converters in sequence, and the gas temperature gradually decreases. This causes some converters to operate at insufficient temperatures, resulting in saturated water vapor precipitating moisture and forming an acidic liquid, which corrodes the pipeline and affects the reliability of the mixed gas heating system. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a mixed gas heating system that heats the mixed gas by connecting heaters in series, which can effectively improve the stability and reliability of the front-end converter, reduce the risk of pipeline corrosion and damage, and improve the operational reliability of the mixed gas heating system.

[0004] This utility model provides a mixed gas heating system, which includes: a mixed gas input end, a front-end converter, and a preheater;

[0005] The preheater is connected in parallel between the mixed gas inlet and the front converter.

[0006] A heater is also provided between the mixed gas input terminal and the front-end converter, and the heater is connected in series with the preheater.

[0007] Furthermore, the mixed gas heating system is also provided with a steam input terminal, which is connected to the heater.

[0008] Furthermore, a control valve is provided at the steam input end.

[0009] Furthermore, a temperature sensor is installed at the output position of the preheater, and the temperature sensor is signal-connected to the control valve;

[0010] There are two or more preheaters.

[0011] Furthermore, a selection pipe is provided between the mixed gas input terminal and the front-end converter;

[0012] The selection pipeline is equipped with a first linkage valve, and the heater is connected in parallel with the selection pipeline.

[0013] Furthermore, the input end of the heater is provided with a second linkage valve, which is linked and controlled with the first linkage valve.

[0014] Furthermore, when the first linkage valve is turned on, the second linkage valve is turned off;

[0015] When the first linkage valve is closed, the second linkage valve is opened.

[0016] Furthermore, a third valve is provided at the output end of the heater, and the third valve is configured as a one-way valve.

[0017] Furthermore, the steam temperature output from the steam input terminal is 140–160°C.

[0018] Furthermore, the heater is made of carbon steel.

[0019] This invention provides a mixed gas heating system. By connecting a heater in series between the mixed gas and the front-end converter, and adjusting the pipeline connection between the heater and the mixed gas heating system with a linkage valve, the heater can increase the heating temperature of the mixed gas, reduce the risk of moisture precipitation inside the front-end converter, thereby reducing the occurrence of acidic liquid corrosion of the pipeline and improving the operational reliability and stability of the mixed gas heating system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the mixed gas heating system according to an embodiment of the present invention;

[0021] Figure 2 This is an example of the embodiments of this utility model. Figure 1 An enlarged schematic diagram of the structure at point A.

[0022] In the diagram: 1 is the mixed gas input end, 2 is the steam input end, 3 is the preheater, 4 is the heater, 5 is the front converter, 6 is the second linkage valve, 7 is the first linkage valve, and 8 is the third valve. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to Figure 1-2 This utility model provides a mixed gas heating system, which includes a mixed gas input terminal 1, a front-end converter 5, and a preheater 3. The mixed gas of acetylene and hydrogen chloride is cooled by a cooler and dehydrated by a demister before being input into the mixed gas heating system from the mixed gas input terminal 1. The mixed gas is heated based on the mixed gas heating system.

[0025] Lowering the gas temperature using a cooler helps reduce gas volume and prevents unnecessary chemical reactions, while removing moisture from the gas using a demister ensures smooth subsequent processing and product quality.

[0026] Specifically, the preheater 3 is connected in parallel between the mixed gas input terminal 1 and the front-end converter 5. By preheating the mixed gas through the preheater 3, the preheating efficiency of the mixed gas heating system can be improved, so that the mixed gas can be maintained at a suitable preheating temperature to meet the subsequent heating requirements.

[0027] Specifically, a heater 4 is also provided between the mixed gas input terminal 1 and the front-end converter 5. The heater 4 is connected in series with the preheater 3, so that after the mixed gas passes through the preheater 3, the mixed gas can be further heated by the heater 4 to increase the temperature of the mixed gas entering the front-end converter 5, thereby ensuring the working reliability of the front-end converter 5.

[0028] Furthermore, the mixed gas heating system is also provided with a steam input terminal 2, which is connected to the heater 4. The steam input terminal 2 is used to input working steam into the heater 4, so that the heater 4 can meet the heating operation of the mixed gas.

[0029] Furthermore, the steam temperature input from the steam input terminal 2 to the heater 4 is configured to be 160–180°C, and the steam pressure at the steam input terminal 2 is 0.6 PMa, ensuring that the steam input from the steam input terminal 2 to the heater 4 meets the heating requirements of the heater 4 for the mixed gas. Based on the secondary heating of the mixed gas by the heater 4, the initial temperature of the mixed gas entering the front-end converter 5 can be stabilized between 110°C and 120°C, thereby ensuring that the mixed gas has a sufficient reaction temperature within the front-end converter 5.

[0030] Furthermore, the steam input terminal 2 is equipped with a control valve, which is used to control the steam supply to the heater 4. A temperature sensor is installed at the output position of the preheater 3, and the temperature sensor is signal-connected to the control valve. Based on the temperature sensor at the output position of the preheater 3, the mixed gas heating system can obtain the gas temperature of the mixed gas in real time. This allows the steam input terminal 2 to adjust the steam supply rate and steam supply amount to the heater 4 according to the preheating temperature of the mixed gas, thereby adjusting the operating frequency of the heater 4 to meet the temperature control requirements for secondary heating of the mixed gas.

[0031] Furthermore, when the temperature of the mixed gas measured at the output position of the preheater 3 meets the conversion requirements of the front-end converter 5, the control valve is adjusted to the closed state, so that the steam input end 2 can stop the steam supply to the heater 4, and the heater 4 is in an idle state.

[0032] Furthermore, the heater 4 is made of carbon steel, which allows the heater 4 to meet the requirements of steam input and achieve secondary heating of the mixed gas.

[0033] Specifically, a selection pipe is provided between the mixed gas input terminal 1 and the front-end converter 5. The selection pipe is equipped with a first linkage valve 7. The heater 4 is connected in parallel with the selection pipe. The selection pipe is used to adjust the connection relationship between the heater 4 and the internal pipeline structure of the mixed gas heating system. When the selection pipe is open, the heater 4 can be in a short-circuited state, so that the mixed gas can directly enter the front-end converter 5 through the selection pipe. The first linkage valve 7 is used to adjust the open and closed state of the selection pipe.

[0034] Furthermore, the first linkage valve 7 can be configured as an electronic valve, and the electronic valve is connected to the temperature sensor signal so that the first linkage valve 7 can adjust the conduction state of the selection pipeline according to the preheating temperature of the mixed gas.

[0035] Specifically, the input end of the heater 4 is provided with a second linkage valve 6, which is linked with the first linkage valve 7 for control. Based on the linkage control between the first linkage valve 7 and the second linkage valve 6, the accuracy of gas pipeline control of the mixed gas heating system can be improved.

[0036] Furthermore, when the first linkage valve 7 is open, the second linkage valve 6 is closed, and when the first linkage valve 7 is closed, the second linkage valve 6 is open. Through the linkage opening and closing control between the first linkage valve 7 and the second linkage valve 6, the mixed gas can be preheated by the preheater 3 and then sent to the heater 4 for secondary heating before entering the front-end converter 5, or the mixed gas can directly enter the front-end converter 5. The two conveying paths are independent of each other to avoid the situation of mixed gas conveying disorder.

[0037] Furthermore, a third valve 8 is provided at the output end of the heater 4. The third valve 8 is configured as a one-way valve. Based on the one-way valve, the delivery direction of the pipeline where the output end of the heater 4 is located can be restricted, so as to prevent the mixed gas from being delivered in reverse from the pipeline where the output end of the heater 4 is located to the heater 4 after passing through the selected pipeline, thereby improving the operational reliability and stability of the mixed gas heating system.

[0038] This utility model provides a mixed gas heating system. By connecting a heater 4 in series between the mixed gas and the front-end converter 5, and adjusting the pipeline connection between the heater 4 and the mixed gas heating system with a linkage valve, the heater 4 can increase the heating temperature of the mixed gas, reduce the risk of moisture precipitation inside the front-end converter 5, thereby reducing the occurrence of acidic liquid corrosion of the pipeline and improving the operational reliability and stability of the mixed gas heating system.

[0039] Furthermore, the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A mixed gas heating system characterized by, The mixed gas heating system comprises a mixed gas input end, a front-stage converter and a preheater; The preheater is arranged in parallel between the mixed gas input end and the front-stage converter; A heater is further arranged between the mixed gas input end and the front-stage converter, and the heater is connected in series with the preheater.

2. The mixed gas heating system of claim 1, wherein The mixed gas heating system is further provided with a steam input end, and the steam input end is connected with the heater.

3. The mixed gas heating system of claim 2, wherein, The steam input end is provided with a control valve.

4. The mixed gas heating system of claim 3, wherein A temperature sensor is arranged at an output position of the preheater, and the temperature sensor is signal-connected with the control valve. The preheater is two or more.

5. The hybrid gas heating system of claim 1, wherein, A selection pipe is arranged between the mixed gas input end and the front-stage converter. The selection pipe is provided with a first linkage valve, and the heater is connected in parallel with the selection pipe.

6. The mixed gas heating system of claim 5, wherein, An input end of the heater is provided with a second linkage valve, and the second linkage valve is linkage-controlled with the first linkage valve.

7. The mixed gas heating system of claim 6, wherein When the first linkage valve is open, the second linkage valve is closed. When the first linkage valve is closed, the second linkage valve is open.

8. The mixed gas heating system of claim 6, wherein, An output end of the heater is provided with a third valve, and the third valve is configured as a one-way valve.

9. The hybrid gas heating system of claim 2, wherein, The steam temperature output by the steam input end is 160-180℃.

10. The hybrid gas heating system of claim 1, wherein, The material of the heater is carbon steel.

Images