Energy saving device for coke oven gas compressor system

Abstract

This utility model discloses an energy-saving device for a coke oven gas compressor system. The beneficial effects are as follows: Through data analysis, this utility model adds a first outlet valve, a second outlet valve, and an outlet drain valve to the pipeline opening after the second-stage separator of the coke oven gas compressor, where the second-stage exhaust pressure is 0.35-0.4 MPa. Each of these valves allows approximately 1000 Nm³ / h of coke oven gas to be discharged. Furthermore, an activated carbon filter is added, equipped with inlet valves for the fuel gas desulfurization tank, outlet valves for the fuel gas desulfurization tank, and a branch line valve for the fuel gas desulfurization tank. This facilitates the disconnection of the activated carbon filter from the fuel gas pipeline system for maintenance. The activated carbon filter primarily removes impurities such as hydrogen sulfide, oil, and naphthalene from the coke oven gas. After being controlled by a shut-off valve, the gas is sent to a purified fuel gas buffer tank for use as fuel gas, effectively reducing the workload of the coke oven gas compressor and lowering energy consumption.

Description

Technical Field

[0001] This utility model relates to the technical field of energy-saving devices for methanol production systems from coke oven gas, specifically to energy-saving devices for coke oven gas compressor systems. Background Technology

[0002] Currently, the development model of a green, low-carbon, and circular economy is emerging globally, with countries and economies worldwide cultivating and developing energy-saving industries as strategic emerging industries. Coke oven gas compressor equipment is a crucial core piece of equipment in the coke oven gas-to-methanol production process, and also a major energy consumer. Therefore, researching energy-saving technologies for coke oven gas compressor systems is imperative.

[0003] Significant progress has been made in energy-saving technologies for coke oven gas compressor systems both domestically and internationally. This progress is achieved through improvements in impeller technology, upgrades to reflux flow control, optimization of pipeline layout, and variable frequency speed control technology. Internationally, efforts have been made in areas such as high-efficiency impeller design, application of intelligent control systems, and integrated and modular design to further enhance energy-saving effects and equipment performance.

[0004] Current research on energy-saving technologies for coke oven gas to methanol systems and coke oven gas compressors mainly focuses on energy-saving equipment, energy-saving benefit evaluation, energy-saving laws and regulations, and related economic incentives. Research on new energy-saving process technologies is relatively weak. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The technical problem to be solved by this utility model is to provide an energy-saving device for a coke oven gas compressor system that optimizes the process route by analyzing the fuel gas composition and pressure demand data of the methanol purification process, adapts to the secondary outlet of the coke oven gas compressor, and reduces the energy consumption of the compressor, in light of the current state of the technology.

[0007] (II) Technical Solution

[0008] This utility model is achieved through the following technical solution: This utility model proposes an energy-saving device for a coke oven gas compressor system, including a two-stage outlet pipeline of the coke oven gas compressor. A first outlet valve is installed on one side of the second-stage outlet pipeline, and a second outlet valve is installed on the same side. An outlet drain valve is installed between the first and second outlet valves. A pipeline drain valve is installed on the side of the second outlet valve opposite to the first outlet valve. A power plant coke oven gas external transmission valve is located on one side of the pipeline drain valve. A check valve is connected to the outlet of the power plant coke oven gas external transmission valve, and a second outlet valve is connected to the outlet of the check valve. One side of the two valves is connected to the inlet valve of the fuel gas desulfurization tank. The outlet of the inlet valve of the fuel gas desulfurization tank is connected to an activated carbon filter tank. The outlet of the activated carbon filter tank is connected to the outlet valve of the fuel gas desulfurization tank. A fuel gas desulfurization tank bypass valve is also connected in parallel on the second-stage outlet pipeline of the coke oven gas compressor, located at the activated carbon filter tank. A shut-off valve is installed on one side of the bypass valve of the fuel gas desulfurization tank. A shut-off valve is installed on one side of the shut-off valve. A shut-off valve bypass line is installed in parallel on one side of the shut-off valve, the shut-off valve, and the shut-off valve. The outlets of the shut-off valve bypass line and the shut-off valve bypass line are all connected to an inlet valve of the fuel gas buffer tank. The outlet of the inlet valve of the fuel gas buffer tank is connected to the fuel gas buffer tank.

[0009] Furthermore, the outlet of the second-stage outlet pipeline of the coke oven gas compressor is connected to the inlet of the first valve of the second-stage outlet, and the first valve of the second-stage outlet and the second valve of the second-stage outlet are connected in series.

[0010] Furthermore, the outlet drain valve is connected to the second-stage outlet pipeline of the coke oven gas compressor between the first outlet valve and the second outlet valve of the second stage.

[0011] Furthermore, the pipeline drain valve is connected to the second-stage outlet pipeline of the coke oven gas compressor at the outlet of the second valve of the second stage outlet.

[0012] Furthermore, the first valve for the external coke oven gas supply from the power plant, the check valve, and the second valve for the external coke oven gas supply from the power plant are connected in series.

[0013] Furthermore, the air inlet of the activated carbon filter canister is connected to the second-stage outlet pipeline of the coke oven gas compressor through the inlet valve of the fuel gas desulfurization tank, and the air outlet of the activated carbon filter canister is connected to the second-stage outlet pipeline of the coke oven gas compressor through the outlet valve of the fuel gas desulfurization tank.

[0014] Furthermore, the shut-off valve, the valve before the shut-off valve, and the valve after the shut-off valve together constitute a shut-off assembly.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] This invention, through data analysis, adds a first outlet valve, a second outlet valve, and an outlet drain valve to the second-stage separator of the coke oven gas compressor. Each of these valves, along with the outlet drain valve, allows approximately 1000 Nm³ / h of coke oven gas to be discharged. Additionally, an activated carbon filter is added, equipped with inlet valves for the fuel gas desulfurization tank, outlet valves for the fuel gas desulfurization tank, and a branch line valve for the fuel gas desulfurization tank. This facilitates maintenance of the activated carbon filter by disconnecting it from the fuel gas pipeline system. The activated carbon filter primarily removes impurities such as hydrogen sulfide, oil, and naphthalene from the coke oven gas. The gas is then controlled by a shut-off valve and sent to a purified fuel gas buffer tank for use as fuel gas. This effectively reduces the workload of the coke oven gas compressor and lowers energy consumption. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the energy-saving device of the coke oven gas compressor system described in this utility model.

[0019] The annotations in the attached figures are explained as follows:

[0020] 1. Second-stage outlet pipeline of coke oven gas compressor; 2. First valve at the outlet of the second stage; 3. Second valve at the outlet of the second stage; 4. Outlet drain valve; 5. Pipeline drain valve; 6. First valve for coke oven gas transmission from the power plant; 7. Check valve; 8. Second valve for coke oven gas transmission from the power plant; 9. Inlet valve of fuel gas desulfurization tank; 10. Sub-line valve of fuel gas desulfurization tank; 11. Outlet valve of fuel gas desulfurization tank; 12. Valve before shut-off valve; 13. Shut-off valve; 14. Valve after shut-off valve; 15. Sub-line of shut-off valve; 16. Inlet valve of fuel gas buffer tank; 17. Activated carbon filter tank; 18. Fuel gas buffer tank. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] like Figure 1As shown, the energy-saving device for the coke oven gas compressor system in this embodiment includes a second-stage outlet pipeline 1 of the coke oven gas compressor. A first outlet valve 2 is installed on one side of the second-stage outlet pipeline 1, and a second outlet valve 3 is installed on the other side of the first outlet valve 2. An outlet drain valve 4 is installed between the first outlet valve 2 and the second outlet valve 3. A pipeline drain valve 5 is installed on the side of the second outlet valve 3 opposite to the first outlet valve 2. A power plant coke oven gas external transmission valve 6 is installed on one side of the pipeline drain valve 5. A check valve 7 is connected to the outlet of the first valve 6 for sending coke oven gas from the power plant. The check valve 7 effectively prevents the backflow of coke oven gas. A second valve 8 for sending coke oven gas from the power plant is connected to the outlet of the check valve 7. A fuel gas desulfurization tank inlet valve 9 is connected to one side of the second valve 8. An activated carbon filter tank 17 is connected to the outlet of the inlet valve 9. The inlet valve 9 controls the opening and closing of the inlet pipe of the activated carbon filter tank 17. An outlet valve 1 of the fuel gas desulfurization tank is connected to the outlet of the activated carbon filter tank 17. 1. The outlet valve 11 of the fuel gas desulfurization tank controls the opening and closing of the outlet pipeline of the activated carbon filter tank 17. A fuel gas desulfurization tank bypass valve 10 is also connected in parallel on the second-stage outlet pipeline 1 of the coke oven gas compressor, located at the activated carbon filter tank 17. A shut-off valve 12 is installed on one side of the fuel gas desulfurization tank bypass valve 10, and a shut-off valve 13 is installed on one side of the shut-off valve 12. A shut-off valve 14 is connected to the outlet of the shut-off valve 13. A shut-off valve bypass line 15 is connected in parallel on one side of the shut-off valve bypass line 15 and the shut-off valve 14. The outlet of the rear valve 14 is connected to a fuel gas buffer tank inlet valve 16. The outlet of the fuel gas buffer tank inlet valve 16 is connected to the fuel gas buffer tank 18. The fuel gas buffer tank inlet valve 16 controls the opening and closing of the inlet pipeline of the fuel gas buffer tank 18. Through data analysis, the pipeline opening after the second-stage separator with relatively low pressure in the coke oven gas compressor is used as the fuel gas output section. An activated carbon filter tank 17 is added to remove impurities such as hydrogen sulfide, oil and naphthalene from the coke oven gas and send it to the purified fuel gas buffer tank 18. This can effectively reduce the working load of the coke oven gas compressor and reduce energy consumption.

[0023] like Figure 1As shown, in this embodiment, the outlet of the second-stage outlet pipeline 1 of the coke oven gas compressor is connected to the inlet of the first valve 2 of the second-stage outlet. The first valve 2 and the second valve 3 of the second-stage outlet are connected in series. The outlet drain valve 4 is connected to the second-stage outlet pipeline 1 of the coke oven gas compressor between the first valve 2 and the second valve 3 of the second-stage outlet. The pipeline drain valve 5 is connected to the second-stage outlet pipeline 1 of the coke oven gas compressor at the outlet of the second valve 3 of the second-stage outlet. The first valve 6, the check valve 7, and the second valve 8 of the power plant coke oven gas export are connected in series. The first valve 6, the check valve 7, and the second valve 8 of the power plant coke oven gas export can ensure the convenient delivery of coke oven gas to the second-stage outlet pipeline 1 of the coke oven gas compressor.

[0024] like Figure 1 As shown, in this embodiment, the inlet of the activated carbon filter tank 17 is connected to the outlet pipeline 1 of the second stage of the coke oven gas compressor through the inlet valve 9 of the fuel gas desulfurization tank, and the outlet of the activated carbon filter tank 17 is connected to the outlet pipeline 1 of the second stage of the coke oven gas compressor through the outlet valve 11 of the fuel gas desulfurization tank. The shut-off valve 13, the valve before the shut-off valve 12, and the valve after the shut-off valve 14 together constitute a shut-off assembly. The main function of the activated carbon filter tank 17 is to remove impurities such as hydrogen sulfide, oil, and naphthalene from the coke oven gas. After being controlled by the shut-off assembly, the gas is sent to the purified fuel gas buffer tank 18 for use as fuel gas.

[0025] The specific implementation process of this embodiment is as follows: First, the fuel gas composition and pressure data of the methanol purification process are analyzed. Then, at the opening of the pipeline after the second-stage separator of the coke oven gas compressor (opening pipeline diameter DN150), with the second-stage exhaust pressure at 0.35-0.4MPa, the first outlet valve 2, the second outlet valve 3, and the outlet drain valve 4 are added. Approximately 1000 Nm³ / h is drawn from each of these valves. The coke oven gas on the right is supplied with an activated carbon filter tank 17. The activated carbon filter tank 17 is equipped with an inlet valve 9 for the fuel gas desulfurization tank, an outlet valve 11 for the fuel gas desulfurization tank, and a secondary line valve 10 for the fuel gas desulfurization tank. This facilitates the disconnection of the activated carbon filter tank 17 from the fuel gas pipeline system for maintenance. The main function of the activated carbon filter tank 17 is to remove impurities such as hydrogen sulfide, oil, and naphthalene from the coke oven gas. The gas is then controlled by a shut-off valve 13 and sent to a purified fuel gas buffer tank 18 for use as fuel gas. This effectively reduces the workload of the coke oven gas compressor and lowers energy consumption.

[0026] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy-saving device for a coke oven gas compressor system, characterized in that: The system includes a coke oven gas compressor second-stage outlet pipeline (1), a second-stage outlet first valve (2) installed on one side of the coke oven gas compressor second-stage outlet pipeline (1), a second-stage outlet second valve (3) installed on one side of the second-stage outlet first valve (2), an outlet drain valve (4) installed between the second-stage outlet first valve (2) and the second-stage outlet second valve (3), a pipeline drain valve (5) installed on the side of the second-stage outlet second valve (3) facing away from the second-stage outlet first valve (2), a power plant coke oven gas external transmission valve (6) installed on one side of the pipeline drain valve (5), a check valve (7) connected to the outlet of the power plant coke oven gas external transmission valve (6), a power plant coke oven gas external transmission second valve (8) connected to the outlet of the check valve (7), a fuel gas desulfurization tank inlet valve (9) connected to one side of the power plant coke oven gas external transmission second valve (8), and a fuel gas desulfurization tank inlet valve (9). 9) The outlet of the gas compressor is connected to an activated carbon filter tank (17). The outlet of the activated carbon filter tank (17) is connected to a fuel gas desulfurization tank outlet valve (11). A fuel gas desulfurization tank branch line valve (10) is also connected in parallel on the second-stage outlet pipeline (1) of the coke oven gas compressor at the activated carbon filter tank (17). A shut-off valve (12) is provided on one side of the fuel gas desulfurization tank branch line valve (10). A shut-off valve (13) is provided on one side of the shut-off valve (12). The shut-off valve (13) is connected to a shut-off valve rear valve (14) at its outlet. A shut-off valve sub-line (15) is connected in parallel on one side of the shut-off valve front valve (12), the shut-off valve (13), and the shut-off valve rear valve (14). The shut-off valve sub-line (15) and the shut-off valve rear valve (14) are connected together to a fuel gas buffer tank inlet valve (16). The fuel gas buffer tank inlet valve (16) is connected to a fuel gas buffer tank (18) at its outlet.

2. The energy-saving device for the coke oven gas compressor system according to claim 1, characterized in that: The outlet of the second-stage outlet pipeline (1) of the coke oven gas compressor is connected to the inlet of the first valve (2) of the second-stage outlet, and the first valve (2) of the second-stage outlet is connected in series with the second valve (3) of the second-stage outlet.

3. The energy-saving device for the coke oven gas compressor system according to claim 1, characterized in that: The outlet drain valve (4) is connected to the coke oven gas compressor second-stage outlet pipeline (1) between the first valve (2) and the second valve (3) of the second-stage outlet.

4. The energy-saving device for the coke oven gas compressor system according to claim 3, characterized in that: The pipeline drain valve (5) is connected to the coke oven gas compressor second-stage outlet pipeline (1) at the outlet of the second valve (3) of the second-stage outlet.

5. The energy-saving device for the coke oven gas compressor system according to claim 1, characterized in that: The power plant coke oven gas external transmission valve (6), the check valve (7), and the power plant coke oven gas external transmission valve (8) are connected in series.

6. The energy-saving device for the coke oven gas compressor system according to claim 1, characterized in that: The inlet of the activated carbon filter tank (17) is connected to the second-stage outlet pipeline (1) of the coke oven gas compressor through the inlet valve (9) of the fuel gas desulfurization tank, and the outlet of the activated carbon filter tank (17) is connected to the second-stage outlet pipeline (1) of the coke oven gas compressor through the outlet valve (11) of the fuel gas desulfurization tank.

7. The energy-saving device for the coke oven gas compressor system according to claim 1, characterized in that: The shut-off valve (13), the shut-off valve before valve (12), and the shut-off valve after valve (14) together constitute a shut-off assembly.

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