Rapid online leak detection device for gasifier burner

Abstract

The utility model discloses a quick online leak detection device for a gasification furnace burner, which comprises a gasification furnace, a cooling water supply pipeline is connected with a cooling water inlet of the gasification furnace, a cooling water outlet of the gasification furnace is connected with a cooling water return buffer tank through a cooling water buffer pipeline, and a combustible gas detector is arranged at the top of the cooling water return buffer tank. A low-pressure nitrogen pipeline is inserted into the bottom, and a water return pipeline is further arranged at the bottom. The device has the beneficial effects that the device can be used for monitoring the operation condition of the burner on line as soon as possible and quickly, the DCS control system can quickly give an alarm once the burner is damaged and leaked, and an operator can quickly take emergency treatment measures to ensure the safe operation of the gasifier; the device is wide in application range, and can be used for all coal gasification processes such as a single-nozzle gasification furnace, a multi-nozzle gasification furnace, a coal water slurry gasification furnace, a dry pulverized coal gasification furnace and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of coal gasification, in particular to a device for rapid online leakage detection of a burner of a gasifier. Background Art

[0002] The coal gasification process is a thermochemical processing process of coal. It is a process that uses coal, oxygen and other raw materials to convert coal into combustible gases such as carbon monoxide, hydrogen, and methane through chemical reactions under high temperature and high pressure. At present, the coal gasification technologies supported and actively promoted by the country include GE gasification, four-nozzle gasification, HT-L, SHELL, GSP and other coal gasification processes, which have high gasification pressure, large single-furnace gasification capacity, wide applicability of raw coal, high effective gas composition, high carbon conversion rate, high raw material utilization rate, less residual carbon in slag, less pollutants, and can meet increasingly high environmental protection requirements. It is a clean production process.

[0003] The equipment for gasifying coal is called a gasifier. The burner is the core component of the gasifier. According to the different coal gasification processes adopted, the gasifier is equipped with a single burner or multiple burners. The burner is used in a high temperature and high pressure environment. The burner head is easily damaged by high temperature radiation and ablation. In the gasification process, in order to extend the service life of the process burner, there is a burner cooling water system specifically for cooling the burner head. A cooling water coil or jacket is set at the burner head. The desalted water from the pipe network system is first sent to the desalted water storage tank of the gasification device. After being pressurized by a water pump, the desalted water is sent to the desalted water heat exchanger, and then the cooled desalted water enters the cooling coil or jacket of the corresponding process burner. The desalted water out of the burner cooling coil enters the burner cooling water tank, and then is recycled after pressurization and cooling. At present, the operation and leakage of the burner are mainly monitored through process indicators such as the burner cooling water pressure, the inlet and outlet pressure difference, and the flow rate. It is difficult to monitor the initial leakage of the burner. Summary of the invention

[0004] In view of the above-mentioned problems in the prior art, the utility model provides a device for rapid online leak detection of a gasifier burner, and its technical solution is: it includes a gasifier, a cooling water supply pipe is connected to the cooling water inlet of the gasifier, the cooling water outlet of the gasifier is connected to the cooling return water buffer tank through a cooling water buffer pipe, a combustible gas detector is arranged on the top of the cooling return water buffer tank, a low-pressure nitrogen pipe is inserted into the bottom, and a return water pipe is also arranged at the bottom.

[0005] As a preferred solution, the gasifier and the cooling water return buffer tank are in the same plane.

[0006] As a preferred solution, a liquid level gauge is provided on the side wall of the cooling return water buffer tank.

[0007] As a preferred solution, a vent pipe is provided on the top of the cooling return water buffer tank.

[0008] As a preferred solution, the height of the vent pipe is more than 2.5 meters, and the tail portion is an n-type structure.

[0009] As a preferred solution, a flow meter is provided on the low-pressure nitrogen pipeline.

[0010] As a preferred solution, the combustible gas detector transmits data to a DCS control system.

[0011] As a preferred solution, the return water pipe is an n-type structure.

[0012] As a preferred solution, a plurality of nitrogen nozzles are provided on the low-pressure nitrogen pipeline.

[0013] Beneficial effects of the utility model:

[0014] The device can monitor the burner operation status early, quickly and online. Once the burner is damaged or leaks, the DCS control system can quickly alarm, and the operator can quickly take emergency measures to ensure the safe operation of the gasifier. The device has a wide range of applications and can be used in all coal gasification processes such as single-nozzle gasifiers, multi-nozzle gasifiers, water-coal slurry gasifiers, and dry coal powder gasifiers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] In the figure: 1. Cooling return water buffer tank; 101. Cooling water buffer pipeline; 2. Combustible gas detector; 3. Liquid level meter; 4. Flow meter; 5. Vent pipe; 6. Low-pressure nitrogen pipeline; 7. Return water pipeline; 8. Cooling water supply pipeline; 9. Gasifier; 10. DCS control system. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below based on the accompanying drawings and specific embodiments.

[0018] Example

[0019] like Figure 1 The device shown is a device for rapid online leak detection of a gasifier burner, comprising a gasifier 9, a cooling water supply pipe 8 connected to the cooling water inlet of the gasifier 9, and a cooling water outlet of the gasifier 9 connected to a cooling return water buffer tank 1 through a cooling water buffer pipe 101. A combustible gas detector 2 is arranged on the top of the cooling return water buffer tank 1, a low-pressure nitrogen pipe 6 is inserted into the bottom, and a return water pipe 7 is also arranged at the bottom. The gas monitor 2 can detect one or more of hydrogen, carbon monoxide, and methane.

[0020] Furthermore, the gasifier 9 and the cooling water return buffer tank 1 are in the same plane, which is convenient for installation.

[0021] Furthermore, a liquid level meter 3 is provided on the side wall of the cooling water return buffer tank 1 to monitor the liquid level of the cooling water return buffer tank.

[0022] Furthermore, a vent pipe 5 is provided at the top of the cooling return water buffer tank 1 to safely vent the analyzed gas through a high point.

[0023] Furthermore, the height of the vent pipe 5 is more than 2.5 meters, and the tail portion is an n-type structure, so that venting is performed at a safe height.

[0024] Furthermore, a flow meter 4 is provided on the low-pressure nitrogen pipeline 6 to measure the flow rate of nitrogen entering the buffer tank.

[0025] Furthermore, the combustible gas detector 2 transmits data to the DCS control system 10. If combustible gas is detected in the gas, an alarm signal is immediately transmitted to the DCS system to promptly remind the operator to take corresponding emergency measures.

[0026] Furthermore, the return water pipe 7 is an n-type structure, which prevents gas from entering and ensures that the cooling return water buffer tank always maintains a certain liquid level.

[0027] The low-pressure nitrogen pipeline 6 is provided with a plurality of nitrogen nozzles, which can evenly disperse the nitrogen to achieve a better gas lift effect.

[0028] The above device is used in the following operation process: the cooling water buffer pipe 101 passes the cooling water in the gasifier 9 into the cooling return water buffer tank 1, and the low-pressure nitrogen pipe 6 continuously passes a small flow of low-pressure nitrogen (about 10Nm 3 / h) as the analysis gas for combustible gas, low-pressure nitrogen flows from bottom to top in the cooling water in the form of bubbles to analyze the combustible gas that may be entrained in the cooling water, and then passes through the combustible gas detector 2 for detection. If combustible gas is present, an alarm signal is transmitted to the DCS control system 10 to remind the operator to take emergency management measures, and the gas is safely vented through the vent pipe 5.

Claims

1. A device for rapid online leak detection of a gasifier burner, comprising a gasifier (9), characterized in that: The cooling water supply pipe (8) is connected to the cooling water inlet of the gasifier (9), and the cooling water outlet of the gasifier (9) is connected to the cooling return water buffer tank (1) through the cooling water buffer pipe (101). A combustible gas detector (2) is provided at the top of the cooling return water buffer tank (1), a low-pressure nitrogen pipe (6) is inserted into the bottom, and a return water pipe (7) is also provided at the bottom.

2. The device for rapid online leak detection of a gasifier burner according to claim 1, characterized in that: The gasifier (9) and the cooling return water buffer tank (1) are located on the same plane.

3. The device for rapid online leak detection of a gasifier burner according to claim 1, characterized in that: A liquid level gauge (3) is provided on the side wall of the cooling return water buffer tank (1).

4. The device for rapid online leak detection of a gasifier burner according to claim 1, characterized in that: A vent pipe (5) is provided at the top of the cooling return water buffer tank (1).

5. The device for rapid online leak detection of a gasifier burner according to claim 4, characterized in that: The vent pipe (5) has a height of more than 2.5 meters, and a tail portion thereof has an n-shaped structure.

6. The device for rapid online leak detection of a gasifier burner according to claim 1, characterized in that: The low-pressure nitrogen pipeline (6) is provided with a flow meter (4).

7. The device for rapid online leak detection of a gasifier burner according to claim 1, characterized in that: The combustible gas detector (2) transmits data to the DCS control system (10).

8. The device for rapid online leak detection of a gasifier burner according to claim 1, characterized in that: The water return pipe (7) is an n-type structure.

9. The device for rapid online leak detection of a gasifier burner according to claim 1, characterized in that: The low-pressure nitrogen pipeline (6) is provided with a plurality of nitrogen nozzles.

Images