Sealing gas conveying system for sealing recycle hydrogen compressor

Abstract

The utility model belongs to the technical field of coal tar hydrogenation process, and relates to a sealing gas conveying system for sealing a circulating hydrogen compressor, which comprises a conveying pipeline and heating equipment, the conveying pipeline is connected with the outlet end of the compressor and used for conveying sealing gas. The heating device is arranged on the conveying pipeline and used for heating the sealing gas. According to the utility model, the process gas at the outlet end of the compressor is heated through the additionally arranged heating equipment, so that the process gas can be conveniently heated to the required temperature to serve as sealing gas, the load of the compressor does not need to be increased, unnecessary energy consumption of the compressor is avoided, and in addition, in the actual operation process, the energy consumption is reduced. The load of the compressor can be reduced according to actual process requirements, so that the process gas temperature at the outlet end of the compressor is reduced, and energy conservation and consumption reduction of the compressor are realized.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for circulating hydrogen compressors, and specifically to a sealing gas delivery system for sealing circulating hydrogen compressors. Background Technology

[0002] The circulating hydrogen compressor is a key power unit in a coal tar hydrogenation plant, and its reliability directly affects the normal operation of the plant. The circulating hydrogen compressor uses a dry gas seal to effectively isolate liquid and gaseous media, preventing leakage.

[0003] The sealing gas used in the dry gas sealing system of the recirculating hydrogen compressor is the process gas exiting the compressor. Therefore, the inlet temperature of the sealing gas is the same as the outlet temperature of the recirculating hydrogen compressor. In the dry gas sealing system of the recirculating hydrogen compressor, a higher inlet temperature of the sealing gas helps to form a stable sealing environment and improve the sealing effect. However, in order to ensure that the inlet temperature of the sealing gas remains stable at a higher value, the load on the recirculating hydrogen compressor needs to be increased to ensure that the outlet temperature of the process gas from the recirculating hydrogen compressor also remains stable at a higher value, resulting in increased energy consumption of the recirculating hydrogen compressor. Utility Model Content

[0004] To address the technical problem in the background art that increasing the load on the circulating hydrogen compressor is necessary to ensure a stable high inlet temperature for the sealing gas, thus leading to increased energy consumption of the circulating hydrogen compressor, this utility model provides a sealing gas delivery system for the sealing of a circulating hydrogen compressor.

[0005] This utility model relates to a sealing gas delivery system for a circulating hydrogen compressor. By adding a heating device, the process gas at the compressor outlet is heated to the required temperature to be used as sealing gas without increasing the compressor load, thus avoiding unnecessary energy consumption. In addition, during actual operation, the compressor load can be reduced according to actual process requirements, thereby lowering the temperature of the process gas at the compressor outlet and achieving energy saving and consumption reduction of the compressor.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A sealing gas delivery system for a circulating hydrogen compressor includes: a delivery pipeline and a heating device; the delivery pipeline is connected to the compressor outlet end and is used to deliver the sealing gas; the heating device is disposed on the delivery pipeline and is used to heat the sealing gas; wherein the sealing gas is process gas drawn from the compressor outlet end.

[0008] Optionally, the sealing gas delivery system for the circulating hydrogen compressor further includes: an inlet pipeline and an outlet pipeline; one end of the inlet pipeline is connected to the delivery pipeline, and the other end of the inlet pipeline is connected to the inlet end of the heating equipment; one end of the outlet pipeline is connected to the outlet end of the heating equipment, and the other end of the outlet pipeline is connected to the delivery pipeline.

[0009] Optionally, the sealing gas delivery system for the circulating hydrogen compressor further includes at least one normally open valve, wherein at least one of the normally open valves is disposed on the inlet pipeline.

[0010] Optionally, the sealing gas delivery system for the circulating hydrogen compressor further includes: at least one normally open valve, wherein at least one of the normally open valves is disposed on the outlet pipeline.

[0011] Optionally, the sealing gas delivery system for the circulating hydrogen compressor further includes: at least one normally closed valve, wherein at least one normally closed valve is disposed on the delivery pipeline, and at least one normally closed valve is located between the inlet end of the inlet pipeline and the outlet end of the outlet pipeline.

[0012] Optionally, the sealing gas delivery system for the circulating hydrogen compressor further includes: a condensate drain line, which is located at the bottom of the heating device and is connected to the inner cavity of the heating device.

[0013] Optionally, the sealing gas delivery system for the circulating hydrogen compressor seal further includes: at least one condensate drain valve, wherein at least one of the condensate drain valves is disposed on the condensate drain line.

[0014] Optionally, the sealing gas delivery system for the circulating hydrogen compressor further includes a temperature regulating component, which includes a temperature detection element electrically connected to the heating equipment. The temperature detection element is used to detect the actual temperature of the process gas in the heating equipment and output a signal.

[0015] Optionally, the temperature regulation component further includes a temperature transmitter electrically connected to the temperature sensing element, the temperature transmitter being used to convert the signal output by the temperature sensing element into an electrical signal and output it.

[0016] Optionally, the temperature regulation component further includes a controller, which is electrically connected to the heating device, the temperature sensing element, and the temperature transmitter.

[0017] In summary, this utility model has the following beneficial technical effects:

[0018] This utility model relates to a sealing gas delivery system for a circulating hydrogen compressor. By adding a heating device, the process gas at the compressor outlet is heated to the required temperature to be used as sealing gas without increasing the compressor load, thus avoiding unnecessary energy consumption. In addition, during actual operation, the compressor load can be reduced according to actual process requirements, thereby lowering the temperature of the process gas at the compressor outlet and achieving energy saving and consumption reduction of the compressor. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the sealing gas delivery system for the circulating hydrogen compressor of this utility model.

[0020] Explanation of reference numerals in the attached diagram: 1. Conveying pipeline; 2. Heating equipment; 3. Inlet pipeline; 4. Outlet pipeline; 5. Normally open valve; 6. Normally closed valve; 7. Drainage pipeline; 8. Drainage valve; 9. Temperature sensing element; 10. Temperature transmitter; 11. Controller. Detailed Implementation

[0021] The technical solution of this utility model will be further explained and described below with reference to the accompanying drawings and embodiments, but this utility model is not limited to the embodiments described below.

[0022] Reference Figure 1 This utility model provides a sealing gas delivery system for a circulating hydrogen compressor, comprising: a delivery pipeline 1 and a heating device 2; the delivery pipeline 1 is connected to the compressor outlet end and is used to deliver sealing gas; the heating device 2 is installed on the delivery pipeline 1 and is used to heat the sealing gas. The sealing gas is process gas drawn from the compressor outlet end.

[0023] Specifically, the heating device 2 can be an electric heater, a gas heater, a steam heater, an infrared heater, etc., all of which fall within the protection scope of this utility model.

[0024] In this embodiment, the process gas at the outlet of the circulating hydrogen compressor directly enters the delivery pipeline 1. When the process gas reaches the heating device 2, the heating device 2 heats the process gas to the required temperature. The heated process gas then enters the circulating hydrogen compressor sealing system as the required sealing gas. This configuration, by adding the heating device 2 to heat the process gas at the compressor outlet, facilitates heating the process gas to the required temperature for use as a sealing gas without increasing the compressor load, thus avoiding unnecessary energy consumption. Furthermore, during actual operation, the compressor load can be reduced according to actual process requirements, lowering the process gas temperature at the compressor outlet and achieving energy saving and consumption reduction. Specifically, in this embodiment, the compressor load is adjusted to stabilize the process gas temperature at the compressor outlet at 68°C. Subsequently, the heating device 2 heats the process gas at the compressor outlet to the range of 76°C to 78°C. The heated process gas at the compressor outlet then serves as the sealing gas to seal the circulating hydrogen compressor.

[0025] The sealing gas delivery system for the circulating hydrogen compressor seal may further include: an inlet pipeline 3 and an outlet pipeline 4. One end of the inlet pipeline 3 is connected to the delivery pipeline 1, and the other end of the inlet pipeline 3 is connected to the inlet end of the heating device 2; one end of the outlet pipeline 4 is connected to the outlet end of the heating device 2, and the other end of the outlet pipeline 4 is connected to the delivery pipeline 1. That is, part of the process gas in the delivery pipeline 1 is led to the heating device 2 through the inlet pipeline 3. After being heated by the heating device 2, the process gas is led back to the delivery pipeline 1 through the outlet pipeline 4. The heated process gas mixes with the unheated process gas in the delivery pipeline 1. The temperature of the mixed process gas reaches the required temperature, so that it can be used as the sealing gas to enter the circulating hydrogen compressor sealing system. This arrangement avoids direct contact between the heating device 2 and the delivery pipeline 1, thereby avoiding the delivery pipeline 1 from being subjected to high temperatures and pressures and improving the service life of the delivery pipeline 1.

[0026] Reference Figure 1 In some embodiments, the sealing gas delivery system for the circulating hydrogen compressor may further include at least one normally open valve 5, which is disposed on the inlet pipeline 3. The number of normally open valves 5 can be one, two, three, or four, all of which fall within the protection scope of this utility model. This arrangement allows a portion of the process gas drawn from the compressor outlet to directly enter the inlet pipeline 3, improving the process gas delivery efficiency. Furthermore, the flow rate of the process gas in the inlet pipeline 3 can be adjusted by regulating the opening degree of the normally open valve 5 to adapt to different operating conditions.

[0027] Reference Figure 1In some embodiments, the sealing gas delivery system for the circulating hydrogen compressor may further include at least one normally open valve 5, which is disposed on the outlet pipeline 4. The number of normally open valves 5 may be one, two, three, or four, all of which fall within the protection scope of this utility model. This arrangement allows the process gas drawn from the outlet end of the self-heating device 2 to directly enter the outlet pipeline 4, improving the process gas delivery efficiency. In addition, the flow rate of the process gas in the outlet pipeline 4 can be adjusted by regulating the opening degree of the normally open valve 5 to adapt to different operating conditions.

[0028] Reference Figure 1 In some embodiments, the sealing gas delivery system for the circulating hydrogen compressor may further include: at least one normally closed valve 6, which is disposed on the delivery pipeline 1 and located between the inlet end of the inlet pipeline 3 and the outlet end of the outlet pipeline 4. The number of normally closed valves 6 can be one, two, three, or four, all of which fall within the protection scope of this utility model. This arrangement ensures that all process gas drawn from the compressor outlet enters the inlet pipeline 3 and is then delivered to the heating equipment 2 for heating, thereby greatly improving the heating efficiency of the process gas.

[0029] Reference Figure 1 In some embodiments, the sealing gas delivery system for the circulating hydrogen compressor may further include a condensate drain line 7, which is located at the bottom of the heating device 2 and communicates with the inner cavity of the heating device 2. That is, during the heating process, the sealing gas generates condensate due to temperature changes, and the condensate is discharged through the condensate drain line 7. This arrangement prevents condensate from accumulating inside the heating device 2, thereby avoiding the condensate affecting the heating efficiency and cleanliness of the sealing gas.

[0030] The sealing gas delivery system for the circulating hydrogen compressor may further include: at least one condensate drain valve 8, which is disposed on the condensate drain line 7. The number of condensate drain valves 8 can be one, two, three, or four, all of which fall within the protection scope of this utility model. This arrangement facilitates flexible adjustment of condensate discharge and the condensate discharge volume according to actual needs.

[0031] Reference Figure 1 In some embodiments, the sealing gas delivery system for the circulating hydrogen compressor may further include a temperature regulating component. This component includes a temperature sensing element 9, which is electrically connected to the heating device 2. The temperature sensing element 9 is used to detect the actual temperature of the process gas in the heating device 2 and output a signal. The temperature sensing element 9 can be a thermocouple temperature sensor or a resistance temperature sensor, both of which fall within the protection scope of this invention. This configuration facilitates obtaining the precise temperature of the process gas in the heating device 2, thereby facilitating the precise heating of the process gas to the required sealing gas temperature and improving the sealing effect of the circulating hydrogen compressor.

[0032] The temperature control assembly may further include a temperature transmitter 10, which is electrically connected to the temperature sensing element 9. The temperature transmitter 10 converts the signal output from the temperature sensing element 9 into an electrical signal and outputs it. That is, the temperature transmitter 10 converts the signal output from the temperature sensing element 9 into an electrical signal and outputs it. The temperature transmitter 10 can be directly connected to a display to monitor the process gas temperature. This configuration facilitates the conversion and linearization of the signal output from the temperature sensing element 9, improving signal stability and accuracy.

[0033] The temperature control assembly may further include a controller 11, which is electrically connected to the heating device 2, the temperature sensor 9, and the temperature transmitter 10. Specifically, the electrical signal output by the temperature transmitter 10 is transmitted to the controller 11. The controller 11 sets a temperature threshold, compares the set threshold with the actual temperature, calculates the deviation, and outputs a control signal to the heating device 2 to adjust the heating power or heating time of the heating device 2 to heat the process gas to the set temperature threshold. This configuration facilitates automatic and precise heating of the process gas, improving its heating efficiency and accuracy.

[0034] The working principle of the sealing gas delivery system for the circulating hydrogen compressor is as follows: all the process gas at the compressor outlet is led to the inlet pipeline 3 through the delivery pipeline 1, and then delivered to the heating device 2 for heating. In the heating device 2, the process gas is heated to the required sealing gas temperature, so that the heated process gas enters the outlet pipeline 4 as the required sealing gas. The process gas in the outlet pipeline 4 goes to the delivery pipeline 1, and then is delivered to the circulating hydrogen compressor sealing system, which can seal the circulating hydrogen compressor.

[0035] The preferred embodiments of this utility model are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A sealing gas delivery system for a circulating hydrogen compressor, characterized in that, include: A delivery pipeline (1) is connected to the outlet end of the compressor, and the delivery pipeline (1) is used to deliver sealing gas; A heating device (2) is installed on the conveying pipeline (1) and is used to heat the sealing gas; The sealing gas is the process gas drawn from the outlet end of the compressor.

2. The sealing gas delivery system for a circulating hydrogen compressor according to claim 1, characterized in that, The sealing gas delivery system for the circulating hydrogen compressor also includes: The air inlet pipeline (3) is connected at one end to the conveying pipeline (1) and at the other end to the inlet end of the heating device (2); The air outlet pipeline (4) is connected at one end to the outlet end of the heating device (2) and at the other end to the conveying pipeline (1).

3. The sealing gas delivery system for a circulating hydrogen compressor according to claim 2, characterized in that, The sealing gas delivery system for the circulating hydrogen compressor also includes: At least one normally open valve (5) is provided on the intake line (3).

4. The sealing gas delivery system for a circulating hydrogen compressor according to claim 2, characterized in that, The sealing gas delivery system for the circulating hydrogen compressor also includes: At least one normally open valve (5) is provided on the gas outlet line (4).

5. The sealing gas delivery system for a circulating hydrogen compressor according to claim 2, characterized in that, The sealing gas delivery system for the circulating hydrogen compressor also includes: At least one normally closed valve (6) is provided on the delivery line (1), and at least one normally closed valve (6) is located between the inlet end of the air inlet line (3) and the outlet end of the air outlet line (4).

6. The sealing gas delivery system for a circulating hydrogen compressor according to any one of claims 1 to 5, characterized in that, The sealing gas delivery system for the circulating hydrogen compressor also includes: A condensate drain line (7) is installed at the bottom of the heating device (2) and the condensate drain line (7) is connected to the inner cavity of the heating device (2).

7. The sealing gas delivery system for a circulating hydrogen compressor according to claim 6, characterized in that, The sealing gas delivery system for the circulating hydrogen compressor also includes: At least one condensate drain valve (8) is provided on the condensate drain line (7).

8. The sealing gas delivery system for a circulating hydrogen compressor according to any one of claims 1 to 5 or claim 7, characterized in that, The sealing gas delivery system for the circulating hydrogen compressor also includes a temperature control component, which comprises: Temperature detection element (9) is electrically connected to the heating device (2). The temperature detection element (9) is used to detect the actual temperature of the process gas in the heating device (2) and output a signal.

9. The sealing gas delivery system for a circulating hydrogen compressor according to claim 8, characterized in that, The temperature regulation component further includes: A temperature transmitter (10) is electrically connected to the temperature sensing element (9). The temperature transmitter (10) is used to convert the signal output by the temperature sensing element (9) into an electrical signal and output it.

10. The sealing gas delivery system for a circulating hydrogen compressor according to claim 9, characterized in that, The temperature regulation component further includes: The controller (11) is electrically connected to the heating device (2), the temperature detection element (9), and the temperature transmitter (10).

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