Burner instability protection system

Abstract

The utility model discloses a burner instability protection system which comprises a burner cooling water buffer tank, the upper end of the burner cooling water buffer tank is fixedly connected with a pressurizing pipeline, and a pressurizing stop valve, a pressurizing regulating valve, a pressure relief stop valve and a pressure relief regulating valve are sequentially arranged on the pressurizing pipeline from left to right. The pressurizing stop valve and the pressurizing regulating valve are both located on the left side of the burner cooling water buffer tank, the pressure relief stop valve and the pressure relief regulating valve are located on the right side of the burner cooling water buffer tank, and a pressurizing regulating valve subline which is installed on the pressurizing pipeline and connected with the pressurizing regulating valve in parallel is further arranged on one side of the pressurizing regulating valve. One side of the pressure relief regulating valve is further provided with a pressure relief regulating valve subline which is installed on the pressurizing pipeline and connected with the pressurizing pipeline in parallel. Compared with the prior art, the device has the advantages that the problem of safety production accidents caused by failure and instability of the pressure relief regulating valve of the cooling water buffer tank of the burner is solved; design is simple, operation is convenient, and interlocking protection is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of burner cooling, in particular to a burner instability protection system. Background Art

[0002] According to the requirements of coal chemical industry and power generation process, the aerospace furnace device adopts the technology of top-mounted single burner, dry feeding and wet dust removal. The burner is made of special high-temperature resistant materials, and a cooling water jacket is set to pass cooling water to cool the burner, thereby extending the service life of the burner. The service life of the burner can generally reach about 500 days. The burner cooling water system is equipped with a cooling water buffer tank. The buffer tank and the gasifier control a certain pressure difference, generally 0.3MPa. The pressure of the burner cooling water buffer tank is always greater than the gasifier pressure to avoid high-temperature synthesis gas pouring into the burner or excessive pressure difference between the inside and outside of the burner to damage the burner or malignant safety events. The pressure difference control between the burner cooling water buffer tank and the gasifier is achieved through the pressure charging and pressure relief pipelines and valve adjustment control set on the top. A regulating valve and a cut-off valve are set on the pressure charging pipeline, and only one regulating valve is set on the pressure relief pipeline. During the actual operation and control process, once the pressure charging regulating valve fails and cannot be adjusted or the valve is fully open, the pressure in the burner cooling water buffer tank will rise sharply. When the pressure difference between the burner cooling water buffer tank and the gasifier reaches a set high-limit interlock value, it will trigger the closing of the shut-off valve on the charging pipeline to protect the burner safely. However, only one regulating valve is set on the pressure relief pipeline. Once the pressure relief regulating valve fails and fully opens to release a large amount of pressure, the pressurized nitrogen cannot meet the sufficient nitrogen to maintain the pressure, resulting in instability of the burner system and imbalance of the internal and external pressure difference causing damage to the burner. There is a safety risk of high-temperature synthesis gas leaking through the damaged burner. For this reason, the utility model proposes a burner instability protection system. Utility Model Content

[0003] The utility model aims to provide a burner instability protection system to solve the problem that when a pressure relief regulating valve fails and fully opens to release a large amount of pressure, the pressurized nitrogen cannot meet the sufficient nitrogen to maintain the pressure, thereby causing the burner system to become unstable, the imbalance of the internal and external pressure difference causes the burner to be damaged, and there is a safety risk of high-temperature synthesis gas leaking through the damaged burner.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a burner instability protection system, comprising a burner cooling water buffer tank, a charging pipeline is fixedly connected to the upper end of the burner cooling water buffer tank, and a charging pipeline is sequentially arranged from left to right with a charging cut-off valve, a charging pressure regulating valve, a pressure relief cut-off valve, and a pressure relief regulating valve, and the charging cut-off valve and the charging pressure regulating valve are both located on the left side of the burner cooling water buffer tank, and the pressure relief cut-off valve and the pressure relief regulating valve are located on the right side of the burner cooling water buffer tank, and one side of the charging pressure regulating valve is also provided with a charging pressure regulating valve secondary line installed on the charging pipeline and connected in parallel with the charging pressure regulating valve, and one side of the pressure relief regulating valve is also provided with a pressure relief regulating valve secondary line installed on the charging pipeline and connected in parallel with the pressure relief regulating valve, and a pressure relief pipeline is connected to one end of the charging pipeline close to the pressure relief regulating valve.

[0005] As a preferred technical solution of the utility model, a front hand valve and a rear hand valve of the charging pressure regulating valve are provided at both ends of the charging pressure regulating valve, located between the two connection points of the charging pressure regulating valve auxiliary line and the charging pipeline.

[0006] As a preferred technical solution of the utility model, a charging pressure regulating valve auxiliary line valve is installed on the charging pressure regulating valve auxiliary line.

[0007] As a preferred technical solution of the utility model, a front hand valve and a rear hand valve of the pressure relief regulating valve are provided at both ends of the pressure relief regulating valve, located between the two connection points of the pressure relief regulating valve auxiliary line and the charging line.

[0008] As a preferred technical solution of the utility model, a front hand valve and a rear hand valve of the pressure relief regulating valve are provided at both ends of the pressure relief regulating valve, located between the two connection points of the pressure relief regulating valve auxiliary line and the charging line.

[0009] As a preferred technical solution of the utility model, a pressure relief regulating valve secondary line valve is installed on the pressure relief regulating valve secondary line.

[0010] Compared with the prior art, the beneficial effects of the utility model are: a burner instability protection system of the utility model, under normal circumstances, is to balance the pressure difference between the burner cooling water buffer tank and the gasifier, and is adjusted and controlled by a pressure relief regulating valve. When the regulating valve fails and is fully open or is opened under other abnormal circumstances, the pressure difference between the burner cooling water buffer tank and the gasifier is sharply reduced, and there is a safety risk of damaging the burner. In order to ensure the safety of the burner of the gasifier, a pressure relief cut-off valve is arranged on the pressure relief pipeline. When the pressure difference between the burner cooling water buffer tank and the gasifier is lower than a certain value, the pressure relief cut-off valve is interlocked and closed, thereby playing a role in protecting the burner safety when the pressure relief pipeline of the burner cooling water buffer tank is in an unstable state.

[0011] The utility model eliminates the problem of incidents affecting production safety caused by failure and instability of the pressure relief regulating valve of the burner cooling water buffer tank; the design is simple and the operation is convenient; the interlocking protection is safe and reliable.

[0012] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] In the figure: 1. burner cooling water buffer tank, 2. charging pipeline, 3. charging cut-off valve, 4. charging regulating valve, 5. front manual valve of charging regulating valve, 6. rear manual valve of charging regulating valve, 7. charging regulating valve auxiliary line, 8. charging regulating valve auxiliary line valve, 9. pressure relief pipeline, 10. pressure relief cut-off valve, 11. pressure relief regulating valve, 12. front manual valve of pressure relief regulating valve, 13. rear manual valve of pressure relief regulating valve, 14. pressure relief regulating valve auxiliary line, 15. pressure relief regulating valve auxiliary line valve. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] See also Figure 1In the present embodiment, a burner instability protection system is provided, including a burner cooling water buffer tank 1, a charging pipeline 2 is fixedly connected to the upper end of the burner cooling water buffer tank 1, and a charging cut-off valve 3, a charging pressure regulating valve 4, a pressure relief cut-off valve 10, and a pressure relief regulating valve 11 are arranged on the charging pipeline 2 from left to right, and the charging cut-off valve 3 and the charging pressure regulating valve 4 are both located on the left side of the burner cooling water buffer tank 1, and the pressure relief cut-off valve 10 and the pressure relief regulating valve 11 are located on the right side of the burner cooling water buffer tank 1, and a charging pressure regulating valve secondary line 7 installed on the charging pipeline 2 and connected in parallel with the charging pressure regulating valve 4 is also provided on one side of the charging pressure regulating valve 4, and a pressure relief regulating valve secondary line 14 installed on the charging pipeline 2 and connected in parallel with the pressure relief regulating valve 4 is also provided on one side of the pressure relief regulating valve 11, and a pressure relief pipeline 9 is connected to one end of the charging pipeline 2 close to the pressure relief regulating valve 11.

[0019] The two ends of the charging pressure regulating valve 4 are located between the two connection points of the charging pressure regulating valve auxiliary line 7 and the charging pressure pipeline 2, and a charging pressure regulating valve front hand valve 5 and a charging pressure regulating valve rear hand valve 6 are provided.

[0020] A charging pressure regulating valve auxiliary line valve 8 is installed on the charging pressure regulating valve auxiliary line 7 .

[0021] The two ends of the pressure relief regulating valve 11 are located between the two connection points of the pressure relief regulating valve auxiliary line 14 and the charging pipeline 2, and a pressure relief regulating valve front hand valve 12 and a pressure relief regulating valve rear hand valve 13 are provided.

[0022] A pressure relief regulating valve auxiliary line valve 15 is installed on the pressure relief regulating valve auxiliary line 14 .

[0023] Among them, the pressure relief and cut-off adopts double-sided sealing ball valves, and the interlock closing value setting of the pressure relief cut-off valve 10 should take into account the situation of burner leakage; the pressure relief venting pipeline outlet 9 is vented in a safe position; the pressure relief cut-off valve 10 is arranged in front of the pressure charging regulating valve 4, which is conducive to eliminating the influence of the pressure difference before and after the valve, and is convenient for the switch of the cut-off valve. It is advisable to arrange the pressure relief cut-off valve 10 on the horizontal pipeline of the pressure relief pipeline 9; the closing of the pressure relief cut-off valve 10 must be interlocked with the pressure difference between the burner cooling water buffer tank 1 and the gasifier, and the pressure difference must be reliably put into use.

[0024] Under normal circumstances, in order to balance the pressure difference between the burner cooling water buffer tank and the gasifier, the pressure relief regulating valve is used for regulation and control. When the regulating valve is fully open due to failure or other abnormal circumstances, the pressure difference between the burner cooling water buffer tank and the gasifier will drop sharply, which may cause safety risks of damaging the burner. To ensure the safety of the gasifier burner, a pressure relief cut-off valve is installed on the pressure relief pipeline. When the pressure difference between the burner cooling water buffer tank and the gasifier is lower than a certain value, the pressure relief cut-off valve is interlocked and closed, thereby protecting the burner safety when the pressure relief pipeline of the burner cooling water buffer tank is unstable.

[0025] When in use, open the front and rear manual valves of the charging regulating valve, and close the bypass valve; open the front and rear manual valves of the pressure relief regulating valve, and close the bypass valve. Open the charging cut-off valve, and adjust the opening of the charging regulating valve to control the pressure difference between the burner cooling water buffer tank and the gasifier at 0.3MPa for automatic control, and keep the pressure relief cut-off valve normally open. When the pressure difference between the burner cooling water buffer tank and the gasifier is lower than 0.3MPa, open the charging regulating valve to replenish the pressure. When the pressure difference between the burner cooling water buffer tank and the gasifier is higher than 0.3MPa, open the pressure relief regulating valve to release the pressure. Once the pressure difference between the burner cooling water buffer tank and the gasifier is lower than 0.01MPa, the pressure relief cut-off valve is interlocked and closed to avoid damage to the burner due to instability of the pressure difference between the inside and outside of the burner, and at the same time avoid safety incidents caused by synthetic gas backflow due to burner damage, thereby ensuring the safe operation of the device.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A burner instability protection system, characterized in that: The invention comprises a burner cooling water buffer tank (1), wherein the upper end of the burner cooling water buffer tank (1) is fixedly connected to a pressure charging pipeline (2), and the pressure charging pipeline (2) is sequentially arranged from left to right with a pressure charging cut-off valve (3), a pressure charging regulating valve (4), a pressure relief cut-off valve (10), and a pressure relief regulating valve (11), and the pressure charging cut-off valve (3) and the pressure charging regulating valve (4) are both located on the left side of the burner cooling water buffer tank (1), and the pressure relief cut-off valve (10) and the pressure relief regulating valve (11) are arranged on the pressure charging pipeline (2) in sequence from left to right. The valve (11) is located on the right side of the burner cooling water buffer tank (1); one side of the charging pressure regulating valve (4) is also provided with a charging pressure regulating valve auxiliary line (7) installed on the charging pressure pipeline (2) and connected in parallel with the charging pressure regulating valve (4); one side of the pressure relief regulating valve (11) is also provided with a pressure relief regulating valve auxiliary line (14) installed on the charging pressure pipeline (2) and connected in parallel with the charging pressure pipeline (2); and one end of the charging pressure pipeline (2) close to the pressure relief regulating valve (11) is connected to a pressure relief pipeline (9).

2. A burner instability protection system according to claim 1, characterized in that: The two ends of the charging pressure regulating valve (4) are located between the two connection points of the charging pressure regulating valve auxiliary line (7) and the charging pressure pipeline (2), and a charging pressure regulating valve front hand valve (5) and a charging pressure regulating valve rear hand valve (6) are provided.

3. A burner instability protection system according to claim 2, characterized in that: A charging pressure regulating valve auxiliary line valve (8) is installed on the charging pressure regulating valve auxiliary line (7).

4. A burner instability protection system according to claim 1, characterized in that: The two ends of the pressure relief regulating valve (11) are located between the two connection points of the pressure relief regulating valve auxiliary line (14) and the charging pipeline (2), and a pressure relief regulating valve front hand valve (12) and a pressure relief regulating valve rear hand valve (13) are provided.

5. A burner instability protection system according to claim 4, characterized in that: A pressure relief regulating valve secondary line valve (15) is installed on the pressure relief regulating valve secondary line (14).

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