Ash removal device for coil pipe of molten salt furnace

Abstract

The utility model discloses a molten salt furnace coil pipe ash removal device which comprises a compressed air inlet pipe, an acetylene gas inlet pipe, a mixer, a flame arrester, an ignition tank, a pulse generator and a coil pipe flue, the output end of the compressed air inlet pipe and the output end of the acetylene gas inlet pipe are fixedly connected and communicated with the input end of the mixer, and the flame arrester is installed in the output end of the mixer. The two barometers are used for monitoring the air pressure in the pipeline in real time, when the situation that sealing is not firm and air leakage occurs, entering of pulse air can be automatically stopped through the sensor, the air pressure in the smoke coiling pipeline is larger than the air pressure at the connector, the top plate abuts against the pressing switch, and the electric valve at the input end of the smoke coiling pipeline is closed; therefore, the plugging block is used for plugging the gas cavity, automatic pulse stopping is achieved, smoke leakage is avoided, maintenance personnel can conveniently conduct maintenance and achieve real-time monitoring, meanwhile, connection is simple and convenient, and the maintenance efficiency can be effectively improved.

Description

Technical Field:

[0001] The utility model relates to the field of molten salt furnaces, and particularly relates to a dust cleaning device for molten salt furnace coils. Background Art:

[0002] A molten salt furnace is a chain grate furnace using a molten mixture of potassium nitrate, sodium nitrite, and sodium nitrate as a heat transfer medium. It uses a molten salt circulation pump to force liquid-phase circulation. After the heat energy is transported to the heat-using equipment, it then returns to be reheated, which is a direct-flow special industrial furnace. Molten salt can obtain an ultra-high working temperature of 350°C to 580°C under a relatively low operating pressure. It can be widely used in chemical unit operations such as solid caustic soda evaporation and concentration, melamine production, aluminum hydroxide digestion, and high-temperature regeneration of waste liquid and waste oil.

[0003] The coil is divided into an inner coil and an outer coil, both of which are spirally arranged upward along the wall of the molten salt furnace. The openings of the inner and outer coils are both arranged at the bottom of the molten salt furnace.

[0004] Excessive ash accumulation in the molten salt furnace coils is likely to cause blockage, resulting in insufficient negative pressure in the molten salt furnace during the planned maintenance period, causing unplanned shutdowns and affecting normal production. At the same time, during the startup and shutdown processes, the flue gas of the molten salt furnace is in a stage with weak control, which is likely to cause the flue gas index to exceed the standard.

[0005] Therefore, a dust cleaning device for molten salt furnace coils is needed to remove the dust in the coils. Summary of the Utility Model:

[0006] The purpose of the utility model is to provide a dust cleaning device for molten salt furnace coils.

[0007] The utility model is implemented by the following technical solutions:

[0008] A dust cleaning device for a molten salt furnace coil includes a compressed air inlet pipe, an acetylene gas inlet pipe, a mixer, a flame arrester, an ignition tank, a pulse generator, and a coil flue. The output ends of the compressed air inlet pipe and the acetylene gas inlet pipe are fixedly connected and communicated with the input end of the mixer. A flame arrester is installed inside the output end of the mixer. The output end of the mixer is fixedly connected and communicated with the input end of the ignition tank. The output end of the ignition tank is fixedly connected and communicated with the input end of the pulse generator. The output end of the pulse generator is fixedly connected and communicated with the input end of the coil flue. A connector is fixedly installed at the output end of the pulse generator. Two air cavities are arranged inside the connector. Two extension pipes which are slidably connected are inserted into one side of the connector. One end of each extension pipe is fixedly connected with a plugging block through a connecting rod. Each plugging block is arranged in the corresponding air cavity. Two dovetail grooves are arranged on the outer wall of each extension pipe. A dovetail block is slidably connected in each dovetail groove. A moving ring is fixedly connected between the corresponding two dovetail blocks. The moving ring is sleeved on the corresponding extension pipe and is slidably connected with it. A locking ring is fixedly connected to one side of each moving ring. A plurality of bolts are screwed on the locking ring. Each locking ring is sleeved on the pipe wall of the input end of the corresponding coil flue. A sealing ring is fixedly installed on the inner wall of each extension pipe.

[0009] Preferably, pressure gauges are fixedly installed on both the moving ring and the extension pipe.

[0010] Preferably, a top plate is fixedly installed on the side wall of the extension pipe, and two push switches are fixedly installed on the side wall of the connector. Each push switch is arranged opposite to the corresponding top plate.

[0011] Advantages of the present utility model: The air pressure inside the pipeline is monitored in real time by two pressure gauges. When the sealing is not firm and air leakage occurs, the entry of pulse gas is automatically closed by the sensor first, so that the air pressure inside the coil flue is greater than the air pressure at the connector, causing the top plate to press against the push switch, and the electric valve at the input end of the coil flue is closed. Thus, the air cavity is blocked by the plugging block, realizing automatic stopping of the pulse, avoiding smoke leakage, enabling maintenance personnel to perform maintenance conveniently, realizing real-time monitoring, and at the same time, the connection is simple and convenient, which can effectively improve the maintenance efficiency. Description of the drawings:

[0012] Figure 1 is a schematic diagram of the structure of the present utility model;

[0013] Figure 2 is a schematic system flow diagram of the structure of the present utility model.

[0014] In the figure: compressed air 1, acetylene gas 2, mixer 3, flame arrester 4, ignition tank 5, pulse generator 6, coil flue 7, connector 8, air chamber 9, plugging block 10, extension pipe 11, top plate 12, push switch 13, sealing ring 14, dovetail groove 15, dovetail block 16, moving ring 17, locking ring 18. Specific implementation manner:

[0015] As Figures 1 to 2 shown, a soot cleaning device for a molten salt furnace coil includes a compressed air inlet pipe 1, an acetylene gas inlet pipe 2, a mixer 3, a flame arrester 4, an ignition tank 5, a pulse generator 6 and a coil flue 7. The output ends of the compressed air inlet pipe 1 and the acetylene gas inlet pipe 2 are fixedly connected and communicated with the input end of the mixer 3. A flame arrester 4 is installed inside the output end of the mixer 3. The output end of the mixer 3 is fixedly connected and communicated with the input end of the ignition tank 5. The output end of the ignition tank 5 is fixedly connected and communicated with the input end of the pulse generator 6. The output end of the pulse generator 6 is fixedly connected and communicated with the input end of the coil flue 7. A connector 8 is fixedly installed at the output end of the pulse generator 6. Two air chambers 9 are arranged inside the connector 8. Two slidably connected extension pipes 11 are inserted into one side of the connector 8. One end of each extension pipe 11 is fixedly connected with a plugging block 10 through a connecting rod. Each plugging block 10 is arranged inside the corresponding air chamber 9. Two dovetail grooves 15 are arranged on the outer wall of each extension pipe 11. A dovetail block 16 is slidably connected inside each dovetail groove 15. A moving ring 17 is fixedly connected between the corresponding two dovetail blocks 16. The moving ring 17 is sleeved on the corresponding extension pipe 11 and is slidably connected with it. A locking ring 18 is fixedly connected to one side of each moving ring 17. A plurality of bolts are screwed on the locking ring 18. Each locking ring 18 is sleeved on the pipe wall of the input end of the corresponding coil flue 7. A sealing ring 14 is fixedly installed on the inner wall of each extension pipe 11. An acetylene gas cylinder is added beside the molten salt furnace, so that the acetylene gas enters the mixer 3 along the acetylene gas inlet pipe 2. The compressed air transported by the utility engineering enters the mixer 3 through the compressed air inlet pipe 1. After the two are mixed, the mixed gas is evenly sent to five ignition tanks 5 through the distributor via the mixed gas pipeline for ignition, and then enters the pulse generator 6. The kinetic energy generated by high-speed combustion stimulates the instantaneous pulse ejected from the soot blowing pipe. When the pulse acts on the ash surface on the inner surface of the coil flue 7, its sound energy and kinetic energy will impact and accelerate the disturbance of the ash particles, so that they are separated from the bonding surface and thus fall off, realizing the dust cleaning work inside the coil flue 7. And an extendable extension pipe 11 is provided. During the installation process, the extension pipe 11 is directly pulled and sleeved on the matching coil flue 7, and then locked by the locking ring 18. At the same time, a sealing ring 14 is added, which further increases the sealing area. Since the inside of the pipeline is at high temperature, the sealing ring 14 is a mechanical seal, which is simple and convenient to operate and has a good sealing effect.

[0016] A pressure gauge is fixedly installed on both the movable ring 17 and the extension pipe 11. The two pressure gauges are responsible for monitoring the air pressure in the corresponding pipelines. When the air pressure in the movable ring 17 drops, it indicates a leak point. At this time, it is transmitted to the pulse generator 6 through the signal sensor, thereby cutting off the gas transmission. As the gas transmission is cut off at the pulse generator 6, the air pressure on the left side will be significantly lower than that on the right side, which will cause the extension pipe 11 to move to the left. Thus, the sealing block 10 connected to the extension pipe 11 is used to seal the air cavity 9 to prevent gas leakage.

[0017] A top plate 12 is fixedly installed on the side wall of the extension pipe 11, and two push switches 13 are fixedly installed on the side wall of the connector 8. Each push switch 13 is arranged opposite to the corresponding top plate 12. When the top plate 12 moves with the extension pipe 11, it will contact the push switch, thereby closing the electric valve at the input end of the cigarette tray pipe 7 to prevent the flue gas at the cigarette tray pipe 7 from leaking out and causing pollution. Thus, maintenance personnel can perform maintenance in a timely and convenient manner without frequently running to turn off the switches of each device, achieving the effects of automatic detection and automatic stop.

[0018] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dust cleaning device for a molten salt furnace coil tube, characterized in that: It includes a compressed air inlet pipe, an acetylene gas inlet pipe, a mixer, a flame arrester, an ignition tank, a pulse generator and a coil flue. The output ends of the compressed air inlet pipe and the acetylene gas inlet pipe are fixedly connected and communicated with the input end of the mixer. A flame arrester is installed inside the output end of the mixer. The output end of the mixer is fixedly connected and communicated with the input end of the ignition tank. The output end of the ignition tank is fixedly connected and communicated with the input end of the pulse generator. The output end of the pulse generator is fixedly connected and communicated with the input end of the coil flue. A connector is fixedly installed at the output end of the pulse generator. Two air cavities are provided inside the connector. Two slidably connected extension pipes are inserted into one side of the connector. One end of each extension pipe is fixedly connected with a blocking block through a connecting rod. Each blocking block is arranged in the corresponding air cavity. Two dovetail grooves are provided on the outer wall of each extension pipe. A dovetail block is slidably connected in each dovetail groove. A moving ring is fixedly connected between the corresponding two dovetail blocks. The moving ring is sleeved on the corresponding extension pipe and is slidably connected with it. One side of each moving ring is fixedly connected with a locking ring. A plurality of bolts are screwed on the locking ring. Each locking ring is sleeved on the pipe wall of the input end of the corresponding coil flue. A sealing ring is fixedly installed on the inner wall of each extension pipe.

2. The ash cleaning device for the molten salt furnace coil according to claim 1, wherein: A pressure gauge is fixedly installed on both the moving ring and the extension pipe.

3. The soot cleaning device for the molten salt furnace coil according to claim 1, characterized in that: A top plate is fixedly installed on the side wall of the extension pipe, and two push switches are fixedly installed on the side wall of the connector. Each push switch is arranged opposite to the corresponding top plate.

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