Torch molecule sealer

Abstract

The utility model discloses a torch molecule sealer applied to the field of chemical engineering. A heating ring pipe, an upper baffle plate and a lower baffle plate are additionally arranged. The upper baffle plate inclining outwards is fixed at the top end of the air inlet pipe; and the inner and outer rib plates for fixing the cover body are arranged among the cover body, the upper baffle plate and the cylinder body. The lower baffle plate is fixed to the outer wall of the air inlet pipe, inclines outwards and is located below the inner ring channel, and the lower baffle plate and a bottom plate of the cylinder body form a storage bin. And the heating ring pipe is arranged in the storage bin or below the bottom plate of the cylinder body. The storage bin is used for storing sundries, the heating ring pipe is used for avoiding freezing, the corrosion-resistant service life of the inner rib plate and the outer rib plate is longer than that of the cover body, and braising accidents are eradicated. The molecular sealing effect is enhanced through the lower baffle plate, and the tempering and flash explosion probability is greatly reduced through the lower baffle plate and the upper baffle plate.

Description

Technical Field

[0001] This utility model is applied in the chemical industry and relates to the safe emission of flare gas, specifically a flare molecular sealer. Background Technology

[0002] In the chemical industry, flare gas emission combustion requires a stable and safe system, and molecular sealing is an indispensable device. It uses a gas with a density less than air for sealing, and its working principle is shown in the attached figure. Figure 1 As shown, the steam nozzle is connected to the steam pipe 7 and installed at the center of the flare gas inlet pipe. The inlet pipe 1, the shroud 2, and the cylinder 3 form an outer ring channel 5 and an inner ring channel 6 with a U-shaped cross-section. The mixture of flare gas and steam passes through the outer ring channel 5 and the inner ring channel 6 and is then discharged from the outlet pipe 4 for combustion. The solid arrows in the figure indicate the flow direction of the flare gas, and the dashed arrows indicate the flow direction of the air. Because the air density is greater than the density of the mixture, the air flows slowly down the inner wall of the cylinder in the outer ring channel 5, reaching the bending area at the bottom of the cylinder. The inner ring channel 6 is filled with a mixture that is less dense than air, so the air cannot enter the inlet pipe through the inner ring channel. After mixing with the mixture in the bending area, it flows out with the mixture. The inner ring channel forms a molecular seal, preventing the flare gas from backfired. The molecular seal of this type of flare has the following defects: ① Since the molecular seal is outdoors, especially in winter, ice will form in the bending area at the bottom of the cylinder, along with oxide scale, mud and other debris, which will affect the flow of the mixed gas. In severe cases, it will cause blockage of the gas channel, increase the pressure in the inlet pipe and cause a pressure stagnation accident; ② The support components of the cover are usually designed with welding performance in mind, and their corrosion resistance is very weak. The flare gas usually contains corrosive gases. When the support components corrode and can no longer support the cover, the cover will fall and block the inlet of the inlet pipe, which will also cause a pressure stagnation accident; ③ The molecular seal is only present in the inner ring channel area. The molecular seal area is small. When the flare gas pressure is unstable or there is insufficient water vapor, backfire and flash explosion will also occur.

[0003] CN209726180U describes a flare molecular sealer, where the top of the bell jar is configured as a top cover consisting of an arc-shaped shell and a boss, with grooves on the surface of the top cover. If the bell jar is corroded and detached, the lower end face of the top cover rests on the upper end face of the flare inlet pipe, allowing flare gas to still flow into the bell jar through the gaps between the grooves and then exit through the flare gas outlet hole along the outer cylinder, thus solving the aforementioned defect ②. CN204084408U describes a flare molecular sealer that, by setting up slag discharge pipes, sediment discharge pipes, and condensate discharge pipes, and opening a ball valve connected to the outside, clears blockages such as rust and sludge. Condensate inside the molecular sealer is discharged through the condensate discharge pipe, solving the problem of debris blockage in defect ①. Its drawback is that it requires multiple slag discharge pipes and valves arranged circumferentially; if the molecular sealer is located at a high position, valve operation is inconvenient. CN213395364U describes a flare discharge system seal, in which a heating coil is wound around the lower part of the cylinder to prevent snow and other debris falling from the flare cylinder in winter from freezing and blocking the flare gas flow channel, thus solving the freezing problem mentioned in defect ①. CN202203956U describes a flare gas baffle-type seal, which also has a heating coil wound around the lower part of the cylinder to prevent gas condensation and liquid carryover, thus preventing a threat to operational safety. CN210861091U describes an elevated flare molecular seal, in which a steam heating device is installed at the lower end of the molecular seal, preventing condensate inside the molecular seal from freezing and causing blockage. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a flare molecular sealer, which is equipped with a storage chamber and a heating ring to prevent debris and freezing from affecting the flare gas passage, and uses upper and lower baffles to change the airflow direction and reduce the probability of backfire.

[0005] The technical solution adopted by this utility model is as follows: This utility model includes an air inlet pipe, a cover, a cylinder, a heating ring pipe, a lower baffle plate, and an upper baffle plate. The upper baffle plate is fixed to the outer top of the air inlet pipe, tilted outwards, and corresponds to the spherical surface of the cover. An inner rib plate is fixedly connected between the upper baffle plate and the cover, and an outer rib plate is fixedly connected between the cover and the cylinder. The lower baffle plate is fixed to the outer wall of the air inlet pipe, tilted outwards, and located below the inner ring channel. The lower baffle plate is located inside the cylinder and forms a storage chamber with the bottom plate of the cylinder. The heating ring pipe is disposed inside the storage chamber or below the bottom plate of the cylinder.

[0006] Furthermore, to increase corrosion resistance and lifespan, the fixed connection is a cold connection, and the thickness of the upper and lower baffles is not less than the thickness of the cover.

[0007] Furthermore, the heating ring pipe inside the storage chamber is a steam ring pipe with one inlet and one outlet.

[0008] Furthermore, the heating ring pipe below the bottom plate of the cylinder is a gas ring pipe. A valve is installed on the connecting pipe between the gas ring pipe and the air inlet pipe, burners are evenly arranged on the gas ring pipe, and an igniter is installed next to the burners.

[0009] Furthermore, the storage compartment has the capacity to store debris that falls during the equipment maintenance cycle or is equivalent to the service life of the enclosure.

[0010] The beneficial effects of this invention are as follows: It utilizes a storage compartment to store miscellaneous items, employs a heating ring to prevent freezing, and the corrosion resistance of the inner and outer reinforcing plates exceeds that of the enclosure, thus eliminating the risk of pressure buildup. The lower baffle plate enhances the molecular sealing effect, and together with the upper baffle, significantly reduces the probability of tempering and flash explosion. Attached Figure Description

[0011] Figure 1 Schematic diagram of the torch molecular sealing principle;

[0012] Figure 2 This is a schematic diagram of the structure of Example 1;

[0013] Figure 3 This is a schematic diagram of a steam loop pipe.

[0014] Figure 4 This is a schematic diagram of the heating ring tube in Example 2;

[0015] Among them: 1-inlet pipe, 2-cover, 3-cylinder, 4-outlet pipe, 5-outer ring channel, 6-inner ring channel, 7-steam pipe;

[0016] 11-Steam ring pipe, 12-Storage bin, 13-Lower baffle, 14-Upper baffle, 15-Inner stiffener, 16-Outer stiffener;

[0017] 21-Igniter, 22-Gas ring tube, 23-Valve, 24-Burn. Detailed Implementation

[0018] For the sake of brevity, the accompanying drawings illustrate the working principle of this utility model. The drawings mainly show the structure of this utility model. Components not shown in the drawings or whose structures are not detailed, such as igniters, steam nozzles, and reinforcing ribs, are all existing technologies. Example

[0019] The torch molecular sealer in this embodiment is as shown in the attached diagram. Figure 2 As shown, in addition to the air inlet pipe 1, cover 2, cylinder 3, air outlet pipe 4, and steam pipe 7, it also includes a steam ring pipe 11, a lower baffle plate 13, an upper baffle plate 14, an inner stiffener plate 15, and an outer stiffener plate 16.

[0020] The upper baffle 14 is fixed to the outside of the top of the air inlet pipe and is also inclined outward. In order to reduce the flow resistance of the mixture after the water vapor and the flare gas are mixed, the top of the cover 2 is spherical and the shape of the upper baffle corresponds to the spherical surface of the cover to ensure that the gas channel size is consistent.

[0021] An inner stiffening plate 15 is fixedly connected between the upper baffle and the shroud. This inner stiffening plate secures the shroud. To prevent the weld seam from becoming a weak point for corrosion, the inner stiffening plate should ideally be cold-connected, such as with fasteners. An outer stiffening plate 16 is fixed between the shroud and the cylinder, also ideally cold-connected. The inner and outer stiffening plates are evenly distributed around the circumference. Thus, the upper baffle, shroud, and cylinder are integrated through these inner and outer stiffening plates. The inner and outer stiffening plates are made of the same material as the shroud but are thicker than it. Even when the shroud reaches its corrosion life, the inner and outer stiffening plates still provide strength to support and secure the shroud.

[0022] The lower baffle 13 is located below the inner ring channel 6 and is fixed to the outer wall of the intake pipe. It is an outwardly inclined plate. The intake pipe is usually circular, and the lower baffle 13 is an outwardly inclined conical surface. The lower baffle 13 is located in the inner cavity of the cylinder 3 and forms a storage chamber 12 with the bottom plate of the cylinder for storing scale, sludge and other debris.

[0023] A steam loop pipe 11 is installed inside the storage chamber 12. The steam loop pipe 11 has only one inlet and one outlet, as shown in the attached diagram. Figure 3 As shown, the inlet is connected to steam pipe 7, and the outlet is connected to the steam nozzle inside the air inlet pipe. To improve the heating effect of the steam ring pipe, the steam ring pipe can be spiral-shaped.

[0024] The working principle of this embodiment is as follows: The flare gas and the water vapor ejected from the steam nozzle form a mixture. This mixture passes through the inner ring channel 6, is deflected upwards at the lower baffle plate 13, and enters the outlet pipe 4 through the outer ring channel 5. When the pressure of the mixture is low, the air flows slowly downwards along the inner wall of the cylinder, enters the storage chamber (as shown by the arrow in the attached diagram), and then flows upwards under the action of the lower baffle plate, mixing with the mixture. It then enters the outlet pipe 4 through the outer ring channel 5, without entering the deflection space on the upper surface of the lower baffle plate or the inner ring channel. To ensure that the air in the storage chamber does not enter the inner ring channel, the outer diameter of the lower baffle plate should be larger than the outer diameter of the cover. In this way, by increasing the lower baffle plate, the deflection space at the bottom of the inner ring channel also becomes a molecular sealing area, increasing the molecular sealing area and thus increasing the safety of the molecular seal. If the flare gas fails and stops, and only water vapor is ejected, the pressure of the mixture will further decrease. If air enters the inner ring channel from the deflection space, the upper baffle plate can also act as an air deflector, causing the airflow to be deflected and preventing it from entering the inlet pipe, thus avoiding backfire or flash explosion. If debris falls onto the upper baffle plate, the combined effect of the baffle plate's inclination and the flow of the mixed gas will cause it to fall into the storage chamber, preventing blockage of the gas passages in the baffle space and thus avoiding a pressure stagnation accident caused by debris. The steam pipes are insulated, but the steam ring pipes do not need insulation. This way, due to the heat dissipation from the steam ring pipes, the condensate in the storage chamber and on the lower baffle plate will not freeze, thus avoiding a pressure stagnation accident caused by freezing. Example

[0025] In Example 1, the heat dissipation from the steam loop affects the steam pressure at the steam nozzle, especially in summer when freezing conditions are absent, leading to energy waste. Therefore, this example uses flare gas as the energy source, with the structure shown in the attached diagram. Figure 4 As shown. Below the bottom plate of the cylinder, a gas ring pipe 22 is fixed. A valve 23, an electromagnetic valve, is installed on the pipe connecting the gas ring pipe and the inlet pipe, allowing for remote control. Burners 24 are evenly arranged on the gas ring pipe. An igniter 21 is installed next to the burners, operating synchronously with the valve. In winter, when the temperature drops below freezing, the flare gas can be connected by controlling the valve and igniter. The heat emitted by the flare gas heats the bottom plate of the cylinder, thereby heating the storage chamber and preventing water vapor condensation and freezing.

[0026] Steam loops and gas loops are collectively referred to as heating loops.

[0027] The storage compartment should be commensurate with the service life of the enclosure, or be able to store debris that falls within a period not less than the equipment maintenance cycle.

[0028] This invention employs a storage compartment to prevent debris from clogging the baffle space and a heated ring pipe to prevent freezing and blockage, ensuring unobstructed flow of the mixed gas at the baffle. The corrosion resistance of the inner and outer stiffening plates exceeds that of the enclosure, preventing the enclosure from falling and blocking the air passage, thus avoiding pressure buildup accidents from two angles. The lower baffle increases the molecular sealing area, enhancing the molecular sealing effect, while the upper baffle alters the airflow direction entering the inner ring channel, significantly reducing the probability of backfire and flash explosion.

Claims

1. A flare molecular sealer, comprising an inlet pipe, a cover, and a cylinder, characterized in that: It also includes a heating ring tube, a lower baffle (13), and an upper baffle (14); The upper baffle (14) is fixed to the outside of the top end of the air inlet pipe, tilted outward, and corresponds to the spherical surface of the cover; the upper baffle (14) and the cover are fixedly connected by an inner stiffening plate (15), and the cover and the cylinder are fixedly connected by an outer stiffening plate (16). The lower baffle (13) is fixed to the outer wall of the air inlet pipe, tilted outward, and located below the inner ring channel. The lower baffle (13) is located inside the cylinder and forms a storage compartment (12) with the bottom plate of the cylinder. The heating ring pipe is located inside the storage compartment (12) or below the bottom plate of the cylinder.

2. The torch molecular sealer according to claim 1, characterized in that: The fixed connection is a cold connection.

3. A torch molecular sealer according to claim 1, characterized in that: The thickness of the lower baffle (13) and the upper baffle (14) is not less than the thickness of the cover.

4. A torch molecular sealer according to claim 1, characterized in that: The heating ring pipe inside the storage chamber (12) is a steam ring pipe with one inlet and one outlet.

5. A torch molecular sealer according to claim 1, characterized in that: The heating ring pipe below the bottom plate of the cylinder is a gas ring pipe.

6. A torch molecular sealer according to claim 5, characterized in that: A valve is installed on the connecting pipe between the gas ring pipe and the air inlet pipe. Burners are evenly arranged on the gas ring pipe, and an igniter is installed next to the burners.

7. A torch molecular sealer according to claim 1, characterized in that: The storage compartment (12) has a space capable of storing debris that falls during the equipment maintenance cycle or less.

Images