Leakage detection device for tuyere small sleeve of blast furnace

Abstract

The utility model discloses a blast-furnace tuyere small sleeve leakage detection device, which comprises a plurality of water return grooves fixedly arranged on a blast-furnace tuyere platform; a first joint of the tee joint is connected with a small sleeve water outlet pipeline, a second joint is connected with a small sleeve water return ball valve, and the small sleeve water return ball valve is connected with a furnace bottom medium-pressure water return main pipe; one end of the water tank is provided with a water inlet pipe, the other end of the water tank is provided with a water outlet pipe, the water inlet pipe is used for connecting a third connector of the tee joint, and the water outlet pipe is used for connecting a recovery tank; and the detection device is used for detecting whether gas discharged from the gas detection port contains carbon monoxide. The water inlet pipe is connected with the third connector of the tee joint, the water outlet pipe is connected with the water inlet in the water return groove, the water return ball valve is closed, the carbon monoxide detector is connected into the gas detection opening, then the small sleeve water inlet ball valve is slowly controlled, and therefore leakage detection can be rapidly conducted on the tuyere small sleeve on line, and whether the tuyere small sleeve is damaged or not can be accurately judged.

Description

Technical Field

[0001] This utility model relates to a technology for detecting whether the tuyere sleeve on the blast furnace tuyere platform is leaking, specifically to a leak detection device for the blast furnace tuyere sleeve. Background Technology

[0002] Several tuyere blowers are installed around the tuyere of the blast furnace. Each tuyere blower corresponds to a tuyere sleeve. The tuyere sleeve is cooled by a sealed circulation cooling method. The tuyere sleeve has cooling water holes. One end of the cooling water hole is connected to the water inlet pipe, and the other end is connected to the water return pipe. The water return pipe is connected to the water return ball valve of the sleeve, and the water return ball valve of the sleeve is connected to the medium-pressure water return main pipe at the bottom of the furnace.

[0003] During normal production, the small tuyeres are subjected to scouring by the coal gun and contact with high-temperature molten slag and iron, which may cause water leakage to varying degrees. If the small tuyeres are damaged and leaking, they need to be checked and confirmed in time to facilitate water control or shutdown and replacement. If not handled in time, it may cause fluctuations in furnace conditions or furnace cooling accidents.

[0004] Therefore, it is necessary to be able to quickly detect whether the small air vent sleeve is damaged or leaking. Summary of the Invention

[0005] This utility model provides a leak detection device for blast furnace tuyere sleeves. In use, the inlet pipe is connected to the third connector of the tee, the outlet pipe is connected to the inlet on the return water tank, the return water ball valve is closed, the carbon monoxide detector is connected to the gas detection port, and then the inlet ball valve of the sleeve is slowly controlled. This allows for rapid online leak detection of the tuyere sleeve and accurate determination of whether the tuyere sleeve is damaged.

[0006] The technical solution disclosed in this utility model is as follows: A leak detection device for a blast furnace tuyeres sleeve, comprising:

[0007] The return water tanks are several in number and are fixedly installed on the blast furnace tuyere platform, and are evenly distributed along the circumference of the blast furnace tuyere on the blast furnace tuyere platform.

[0008] The tee has three joints: the first joint connects to the outlet pipe of the small sleeve, the second joint connects to the return ball valve of the small sleeve, the return ball valve of the small sleeve connects to the medium pressure return main pipe at the bottom of the furnace, and the third joint is equipped with a valve.

[0009] The portable water tank has an inlet pipe installed at one end and an outlet pipe installed at the other end. There is a gap between the height of the outlet pipe and the top of the water tank. The inlet pipe is used to connect to the valve on the third connector, and the outlet pipe is used to connect to the recycling tank. An air vent valve is installed on the top of the water tank, and the air outlet of the air vent valve is connected to the gas detection port.

[0010] A detection device used to detect whether the gas discharged from the gas detection port contains carbon monoxide.

[0011] Based on the above scheme, as a preferred option, a drain pipe is installed at the bottom of the return water tank, and the drain pipe is connected to the medium-pressure return water main at the bottom of the furnace.

[0012] Based on the above scheme, as a preferred option, the detection device is a gas alarm / carbon monoxide detector.

[0013] Based on the above scheme, as a preferred option, a barometer for detecting the gas pressure inside the water tank is installed on the water tank.

[0014] Based on the above scheme, as a preferred option, the height of the water outlet pipe should not exceed half the height of the water tank.

[0015] Based on the above solution, as a preferred option, wheels are installed at the bottom of the water tank.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When in use, connect the inlet pipe to the third connector of the tee, connect the outlet pipe to the inlet on the return water tank, close the return water ball valve, connect the carbon monoxide detector to the gas detection port, and then slowly control the inlet ball valve of the small sleeve. This allows for quick online leak detection of the small sleeve of the air vent and accurate determination of whether the small sleeve of the air vent is damaged.

[0018] Each small vent sleeve was inspected one by one, which improved the accuracy of vent leak detection;

[0019] Effectively reduced the workload of leak detection;

[0020] This lays the foundation for the stable and smooth operation of the blast furnace. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the application of this utility model on a small air vent cover;

[0022] Figure 2 This is a schematic diagram of the tuyere sleeve and return water trough on the blast furnace tuyere platform; Detailed Implementation

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0024] like Figure 1-2 As shown, a leak detection device for a blast furnace tuyere sleeve 17 includes:

[0025] There are several return water tanks 1, which are fixedly installed on the blast furnace tuyere platform 18 and evenly distributed around the blast furnace tuyere 19 on the blast furnace tuyere platform, such as 6 or 4. The number depends on the length of the connecting water pipe between the tank and the water tank and the tee. A return water pipe 2 is installed at the bottom of the return water tank and is connected to the medium pressure return water main pipe at the bottom of the furnace.

[0026] The tee is connected to the following: the first connector 4 connects to the small sleeve outlet pipe 5; the second connector 6 connects to the small sleeve return water ball valve 7; the small sleeve return water ball valve connects to the furnace bottom medium pressure return water main pipe 8; and a valve is installed on the third connector 12.

[0027] The movable water tank 9 has an inlet pipe 10 installed at one end and an outlet pipe 11 installed at the other end. There is a gap between the height of the outlet pipe and the top of the water tank. The inlet pipe is used to connect to the valve 20 on the third connector, and the outlet pipe is used to connect to the recycling tank. An air vent valve 13 is installed on the top of the water tank, and the air outlet of the air vent valve is connected to the gas detection port 14.

[0028] The detection device is used to detect whether the gas discharged from the gas detection port contains carbon monoxide. The detection device is a gas alarm / carbon monoxide detector, which can be installed at the gas detection port.

[0029] When in use, connect the inlet pipe to the third connector of the tee, and the outlet pipe to the inlet 15 on the return water tank. Open the valve on the third connector. After the return water enters the return water tank, close the small sleeve return water ball valve. Connect the carbon monoxide detector to the gas detection port, and then slowly control the small sleeve inlet water ball valve (to divert the flow to reduce the flow rate; if the water tank is large enough, the small sleeve return water ball valve can also be closed directly to allow the gas to separate in the water). When the water speed and flow rate decrease, the gas will separate from the water in the water tank. If the carbon monoxide detector detects an alarm, it is determined that the small sleeve of this vent is damaged.

[0030] A barometer is installed on the water tank to detect the gas pressure inside. When the gas pressure inside the tank is low, it is not necessary to open the vent valve for testing. Alternatively, the barometer can be omitted, but the timing of opening the vent valve will need to be determined based on experience.

[0031] The height of the water outlet pipe should not exceed half the height of the water tank.

[0032] The bottom of the water tank is equipped with 16 wheels for easy movement. One water tank can be used for testing multiple air vents, saving costs.

[0033] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A leakage detection device for a small bushing of a blast furnace, characterized in that, include: The return water tanks are several in number and are fixedly installed on the blast furnace tuyere platform, and are evenly distributed along the circumference of the blast furnace tuyere on the blast furnace tuyere platform. The tee has three joints: the first joint connects to the outlet pipe of the small sleeve, the second joint connects to the return ball valve of the small sleeve, the return ball valve of the small sleeve connects to the medium pressure return main pipe at the bottom of the furnace, and the third joint is equipped with a valve. The portable water tank has an inlet pipe installed at one end and an outlet pipe installed at the other end. There is a gap between the height of the outlet pipe and the top of the water tank. The inlet pipe is used to connect to the valve on the third connector, and the outlet pipe is used to connect to the recycling tank. An air vent valve is installed on the top of the water tank, and the air outlet of the air vent valve is connected to the gas detection port. A detection device used to detect whether the gas discharged from the gas detection port contains carbon monoxide.

2. The leakage detection device for the small bushing of the blast furnace tuyere according to claim 1, characterized in that, A drain pipe is installed at the bottom of the return water tank, and the drain pipe is connected to the medium-pressure return water main at the bottom of the furnace.

3. The leakage detection device for the small bushing of the blast furnace tuyere according to claim 1, characterized in that, The detection device is a gas alarm / carbon monoxide detector.

4. The leakage detection device for the small bushing of the blast furnace tuyere according to claim 1, characterized in that, A barometer is installed on the water tank to detect the gas pressure inside the tank.

5. The leakage detection device for the small bushing of the blast furnace tuyere according to claim 1, characterized in that, The height of the water outlet pipe should not exceed half the height of the water tank.

6. The leakage detection device for the small bushing of the blast furnace tuyere according to claim 1, characterized in that, The bottom of the water tank is equipped with wheels.

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