An oxygen-enriched gas system

Abstract

An oxygen-enriched gas system, comprising a low-pressure oxygen inlet manifold, the low-pressure oxygen inlet manifold being connected with a plurality of single-system inlet pipes, the single-system inlet pipes being connected with a mixer, the mixer being further connected with a single-system fan; a total cut-off valve, a total pipe pressure gauge and a total pipe temperature gauge are arranged on the low-pressure oxygen inlet manifold; a single-system cut-off valve, a Venturi flowmeter and a single-system regulating valve are arranged on the single-system inlet pipe. The oxygen-enriched gas system is provided, the total cut-off valve, the total pipe pressure gauge and the total pipe temperature gauge are arranged on the low-pressure oxygen inlet manifold, the single-system cut-off valve, the Venturi flowmeter and the single-system regulating valve and other components are arranged on the single-system inlet pipe, and the intelligent linkage is realized by cooperating with a main controller, the flow and the pressure can be accurately regulated and controlled, the oxygen temperature and the oxygen concentration are monitored in real time, and the interlocking protection is realized when the abnormality occurs.

Description

Technical Field

[0001] This utility model relates to the field of oxygen enrichment production technology, and in particular to an oxygen enrichment gasification system. Background Technology

[0002] The fixed-bed oxygen-enriched intermittent gasification process is based on the traditional fixed-bed intermittent gasification process. High concentrations of oxygen are added to the air main entering the gasifier to increase the blowing efficiency by increasing the oxygen concentration in the incoming air. However, it suffers from problems such as low control precision, high energy consumption, and slow response. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an oxygen-enriched gas production system that improves the stability and efficiency of the oxygen production system.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an oxygen-enriched gas production system, including a low-pressure oxygen inlet main pipe, which is connected to multiple single-system inlet pipes, and the single-system inlet pipes are connected to a mixer, which is also connected to a single-system fan; a main shut-off valve, a main pipe pressure gauge, and a main pipe thermometer are provided on the low-pressure oxygen inlet main pipe; a single-system shut-off valve, a Venturi flow meter, and a single-system regulating valve are provided on the single-system inlet pipes.

[0005] Preferably, it also includes a main controller, a main shut-off valve, a main pipe pressure gauge and a main pipe thermometer electrically connected to the main controller, and a single system shut-off valve, a venturi flow meter and a single system regulating valve on each single system intake pipe electrically connected to the main controller.

[0006] Preferably, the single-system air intake pipe is also equipped with a thermocouple thermometer, which is electrically connected to the main controller.

[0007] Preferably, the output of the mixer is connected to an oxygen analyzer, and the oxygen analyzer is electrically connected to the main controller.

[0008] Preferably, the main controller receives the gasifier blower valve switch signal and then controls the single-system shut-off valve to operate.

[0009] Preferably, the single-system air intake pipe is also equipped with a single-system manual valve.

[0010] Preferably, the single-system intake pipe is also equipped with a throttling shut-off vent valve.

[0011] Preferably, the output end of the mixer is also provided with a pressure safety valve.

[0012] This invention provides an oxygen-enriched gas production system. By installing a main shut-off valve, a main pipe pressure gauge, and a main pipe thermometer on the low-pressure oxygen inlet main pipe, and a single-system shut-off valve, a Venturi flow meter, and a single-system regulating valve on the individual system inlet pipes, and coordinating with a main controller to achieve intelligent linkage, the system can accurately control flow and pressure, monitor oxygen temperature and concentration in real time, and provide interlock protection in case of abnormalities. A mixer uniformly mixes pure oxygen and air, a pressure safety valve prevents system overpressure, and a single-system manual valve and a throttling shut-off vent valve enhance operational flexibility. This improves control accuracy and system stability, enhances safety, reduces energy consumption, and optimizes process efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a structural block diagram of the control system of this utility model. Detailed Implementation

[0016] like Figure 1-2 As shown, an oxygen-enriched gas production system includes a low-pressure oxygen inlet main pipe 1, which is connected to multiple single-system inlet pipes 2. Each single-system inlet pipe 2 is connected to a mixer 3, and the mixer 3 is also connected to a single-system fan 4. A main shut-off valve 5, a main pipe pressure gauge 6, and a main pipe thermometer 7 are provided on the low-pressure oxygen inlet main pipe 1. A single-system shut-off valve 8, a Venturi flow meter 9, and a single-system regulating valve 10 are provided on each single-system inlet pipe 2.

[0017] Preferably, it also includes a main controller, a main shut-off valve 5, a main pipe pressure gauge 6 and a main pipe thermometer 7 electrically connected to the main controller, and a single system shut-off valve 8, a venturi flow meter 9 and a single system regulating valve 10 on each single system air inlet pipe 2 electrically connected to the main controller.

[0018] The 0.6MPa low-pressure pure oxygen from the air separation system enters each individual system after passing through the main shut-off valve. This valve only has open and close functions and no regulating function. The valve in each individual system is fully closed only when all gasification systems are shut down. As long as any system is still operating, the valve will not close to prevent fluctuations in other systems. The individual system shut-off valve automatically closes in the event of a single system failure, and its operation is synchronized with the blast valves of each gasifier. The valve has a delay in both opening and closing: the delayed closing prevents damage from excessively frequent valve operations; the delayed opening is used to regulate the oxygen consumption of each furnace and prevent furnace condition fluctuations. Individual system flow meters monitor the pure oxygen flow rate in real time, and the individual system regulating valves automatically adjust according to the set flow rate value without manual intervention. The mixer automatically and evenly mixes the pure oxygen with the air in the main air pipe to avoid localized over-oxygenation. Venturi flow meters are used to detect the oxygen consumption of each individual system, and the standard quantity is calculated based on the main pipe pressure and temperature. The single-system regulating valve is air-to-open and intelligently adjusts the oxygen flow rate based on data collected by the Venturi flow meter, without the need for manual intervention.

[0019] Preferably, the single-system air intake pipe 2 is also equipped with a thermocouple thermometer 11, which is electrically connected to the main controller. This thermocouple thermometer 11 detects the oxygen temperature to prevent overheating and combustion; it also quickly interlocks the oxygen supply when the temperature is high.

[0020] Preferably, the output of the mixer 3 is connected to the oxygen analyzer 12, and the oxygen analyzer 12 is electrically connected to the main controller. The oxygen analyzer analyzes the oxygen concentration in the oxygen-enriched environment in real time, and through interlocking intelligent adjustment of the oxygen intake, it stabilizes the oxygen concentration and controls it at 26%-28%.

[0021] Preferably, the main controller receives the gasifier blower valve switch signal and then controls the single-system shut-off valve 8 to operate.

[0022] Preferably, the single-system air intake pipe 2 is also equipped with a single-system manual valve 13. The manual valve is mainly used to shut off the single-system pure oxygen after the single system is shut down, to prevent the regulating valve from not closing tightly, allowing pure oxygen to enter the system and cause an accident.

[0023] Preferably, the single-system air inlet pipe 2 is also equipped with a throttling and shut-off vent valve 14. When the single system needs to be shut down for maintenance, the residual oxygen in the pipe can be vented through this valve to reduce the pressure in the system, ensure maintenance safety, and facilitate the removal of impurities or residual gas in the pipeline.

[0024] Preferably, the output end of the mixer 3 is also equipped with a pressure relief valve 15. When the pressure in the system exceeds a set threshold, the pressure relief valve 15 automatically opens to release pressure, preventing damage to pipelines and equipment or causing safety accidents due to excessive pressure, and ensuring the safety of system hardware.

[0025] In operation, the 0.6MPa low-pressure pure oxygen output from the air separation system enters the system through the low-pressure oxygen inlet manifold 1. The main shut-off valve 5 on the manifold remains open during normal operation and closes only when all gas production systems are shut down to avoid affecting the operation of other systems. Oxygen from the single-system inlet manifold 2 enters the mixer 3 and automatically mixes with the air delivered by the single-system fan 4 to form oxygen-enriched air. The mixer ensures uniform gas mixing and avoids localized over-oxygenation. The Venturi flow meter 9 on the single-system inlet manifold monitors the oxygen flow rate in real time, and the single-system regulating valve 10 automatically adjusts according to the flow rate value set by the main controller (air-to-air type, no manual intervention required). The manifold pressure gauge 6 and manifold thermometer 7, in conjunction with the Venturi flow meter, calculate the standard oxygen consumption and optimize system parameters. Thermocouple thermometer 11 monitors the oxygen temperature in the single-system inlet manifold. If the temperature exceeds the limit, the main controller is activated to cut off the oxygen supply to prevent combustion risks. The oxygen analyzer 12 at the mixer output detects the oxygen enrichment concentration in real time and feeds it back to the main controller. Through interlocking regulation, the oxygen concentration is stabilized at 26%-28%. The main controller receives the gasifier blower valve switch signal and automatically controls the single-system shut-off valve 8 to close. The valve closes with a delay to reduce damage caused by frequent operation. When the system is shut down, the single-system shut-off valve 8 is closed first, then the oxygen is cut off through the single-system manual valve 13, and the pipeline pressure is released using the throttling shut-off vent valve 14 to ensure maintenance safety.

[0026] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. An oxygen-enriched gas production system, comprising a low-pressure oxygen inlet main (1), the low-pressure oxygen inlet main (1) being connected to a plurality of single-system inlet pipes (2), the single-system inlet pipes (2) being connected to a mixer (3), and the mixer (3) being further connected to a single-system fan (4); characterized in that, A main shut-off valve (5), a main pipe pressure gauge (6), and a main pipe thermometer (7) are provided on the low-pressure oxygen inlet main pipe (1); a single system shut-off valve (8), a Venturi flow meter (9), and a single system regulating valve (10) are provided on the single system inlet pipe (2).

2. The oxygen-enriched gasification system according to claim 1, characterized in that: It also includes a main controller, a main shut-off valve (5), a main pipe pressure gauge (6) and a main pipe thermometer (7) electrically connected to the main controller, and a single system shut-off valve (8), a venturi flow meter (9) and a single system regulating valve (10) on each single system air inlet pipe (2) electrically connected to the main controller.

3. The oxygen-enriched gasification system according to claim 2, characterized in that: The single-system air intake pipe (2) is also equipped with a thermocouple thermometer (11), which is electrically connected to the main controller.

4. The oxygen-enriched gasification system according to claim 2, characterized in that: The output of the mixer (3) is connected to the aerobic analyzer (12), and the oxygen analyzer (12) is electrically connected to the main controller.

5. The oxygen-enriched gasification system according to claim 2, characterized in that: The main controller receives the gasifier blow valve switch signal and then controls the single system shut-off valve (8) to operate.

6. The oxygen-enriched gasification system according to claim 1, characterized in that: The single-system air intake pipe (2) is also equipped with a single-system manual valve (13).

7. The oxygen-enriched gasification system according to claim 1, characterized in that: The single-system air intake pipe (2) is also equipped with a throttling shut-off vent valve (14).

8. The oxygen-enriched gasification system according to claim 4, characterized in that: The output end of the mixer (3) is also equipped with a pressure safety valve (15).

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