Novel monitorable rupture disc cooling device

Abstract

The utility model discloses a novel monitorable bursting disc cooling device relates to safety pressure relief device technical field, including export flange, bursting disc, heat insulating cotton, cooling short pipe, thermocouple, bracket, clamping ring, gasket, equipment flange, set up cooling short pipe and fill high accuracy heat insulating cotton at bursting disc entrance end, can effectively reduce 800 DEG C~900 DEG C's superheated steam temperature to be less than or equal to 200 DEG C, installs high range thermocouple signal far away to DCS control room on the outer wall screw thread of cooling short pipe, realizes bursting disc temperature on - line display, overrun alarm, bursting disc can select positive arch ordinary type, positive arch split type or flat plate split type, matches different release pressure and fatigue life demand, the utility model discloses through " short pipe heat insulation + on - line temperature measurement + modular assembly " integrated innovation, thoroughly solved the technical problem of bursting disc failure under 800 DEG C above high -temperature working condition, can be widely applied to steam superheating furnace, ethylene cracking furnace, coal gasification, high -temperature reaction kettle etc. Overtemperature overpressure protection scene.

Description

Technical Field

[0001] This utility model relates to the technical field of safety pressure relief devices, specifically a novel monitorable rupture disc cooling device. Background Technology

[0002] Rupture discs are crucial overpressure protection accessories for pressure vessels, pipelines, and reactors. They can rapidly rupture and release pressure when a system experiences abnormal pressure increases, preventing catastrophic accidents. In recent years, with the rapid development of industries such as petrochemicals, coal chemicals, fine chemicals, metallurgy, and power, the temperature of process media has continued to rise. The operating temperature of some units (such as steam superheaters in styrene synthesis, ethylene cracking furnaces, and coal gasification units) has reached 800℃~900℃ or even higher. However, the long-term temperature resistance limit of the metal materials currently used to manufacture rupture discs (such as nickel-based alloys, stainless steel, aluminum, and copper) and their matching gaskets and adhesives is generally below 400℃. In environments above 800℃, metal grains rapidly coarsen and strength decreases sharply. The rupture disc will prematurely creep, crack, or completely fail, leading to pressure drift during release, loss of sealing performance, and seriously threatening the safety of the equipment.

[0003] To overcome the problem of high-temperature failure, the "pre-cooling" approach is generally adopted both domestically and internationally: 1. Add a cooling pipe (or heat exchanger) at the inlet end of the rupture disc to cool the high-temperature process medium through an external cooling medium (water, air, etc.); 2. Fill the space between the rupture disc and the high-temperature source with a heat insulation layer to reduce the temperature rise due to radiation and thermal conduction.

[0004] However, existing technologies have significant shortcomings: a) Cooling sections are mostly welded or integrally cast, making modular disassembly and assembly impossible. Repairing or replacing rupture discs requires cutting pipelines, resulting in long operation cycles and high costs; b) The cooling section lacks effective insulation, leading to low cooling efficiency and the possibility that the temperature at the rupture disc may still exceed the material's limits; c) No real-time temperature monitoring elements are installed, preventing operators from monitoring the true temperature of the rupture disc online, posing a risk of blind operation; d) The cooling section and rupture disc use a planar seal, which is prone to leakage at high temperatures; e) The cooling device is bulky, complex in structure, and expensive.

[0005] Therefore, there is an urgent need for a rupture disc protection device that is simple in structure, easy to install and maintain, has a significant cooling effect, can monitor the rupture disc temperature in real time, and is suitable for high-temperature conditions above 800℃. Utility Model Content

[0006] The purpose of this utility model is to provide a novel monitorable rupture disc cooling device to solve the problems of the prior art mentioned in the background: a) the cooling section is mostly welded or integrally cast, which cannot be modularly disassembled and reassembled, and pipelines need to be cut when repairing or replacing the rupture disc, resulting in long operation cycles and high costs; b) there is no effective heat preservation structure inside the cooling section, resulting in low cooling efficiency, which may cause the temperature at the rupture disc to still exceed the material limit; c) no real-time temperature measuring element is set, and operators cannot monitor the true temperature of the rupture disc online, which poses a risk of blind operation; d) the cooling section and the rupture disc are sealed by a plane, which is prone to leakage at high temperatures; e) the cooling device is bulky, complex in structure, and expensive.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A novel monitorable rupture disc cooling device, comprising, from top to bottom, an outlet flange, a rupture disc, a cooling short pipe, a bracket, a clamping ring, a gasket, and an equipment flange. The cooling short pipe is filled with heat insulation cotton, and a thermocouple is threadedly fixed to the side wall of the cooling short pipe. The outlet flange includes a circular flange disc with multiple outlet flange holes evenly distributed in the middle, and a flange conical neck is provided on the top surface of the flange disc. The rupture disc includes a circular rupture disc clamping ring with rupture disc flange holes coaxial with the outlet flange holes. A rupture disc is fixedly connected to the inner side of the rupture disc clamping ring. The main body comprises: a cooling short pipe with a central cylindrical section and upper and lower short pipe flanges welded and fixed to its upper and lower ends respectively; the upper short pipe flange has upper short pipe flange holes that correspond one-to-one with and are coaxial with the outlet flange holes; the lower short pipe flange has a plurality of lower short pipe flange holes evenly distributed in a ring; the bracket includes an annular bracket outer ring with a bracket main plate fixed to its inner side, and the bracket main plate has a plurality of bracket through holes machined thereon; the clamping ring is annularly arranged with a plurality of clamping screws evenly distributed in a ring; the equipment flange has a plurality of equipment flange holes evenly distributed in a ring, and the equipment flange holes correspond one-to-one with and are coaxial with the lower short pipe flange holes.

[0008] Preferably, the clamping ring, the equipment flange, and the lower short pipe flange are made of high-temperature and corrosion-resistant materials.

[0009] Preferably, the rupture disc is a standard arch type, an arched slit type, or a flat slit type; the edge of the rupture disc clamping ring has a sealing gasket.

[0010] Preferably, the rupture disc is sealed to the outlet flange and the cooling short pipe using a planar, conical, or tongue-and-groove sealing structure.

[0011] Preferably, the insulation cotton is cut into a fan shape or a circle before filling, and the maximum gap between it and the cooling short pipe is no more than 2mm.

[0012] Preferably, the inside of the short tube cylinder is filled with heat insulation cotton, and a thermocouple is threaded onto the outer wall of the short tube cylinder.

[0013] Preferably, the thermocouple's temperature measuring end is located near the rupture disc but does not contact it; the far end of the thermocouple is connected to the DCS control room; and the thermocouple's temperature measuring range is greater than 800°C.

[0014] Preferably, the bracket has an arched or flat structure; the bracket through holes are distributed radially along the main bracket plate, numbering 20-100, with a diameter of 2-10mm; the bracket's burst pressure is not higher than the burst pressure of the rupture disc, and the venting channel is fully open after bursting.

[0015] Preferably, the gasket is a high-temperature resistant gasket, and its temperature resistance is not lower than the maximum operating temperature of the equipment.

[0016] Preferably, connecting bolts are installed through the outlet flange hole, the rupture disc flange hole, and the upper short pipe flange hole; connecting bolts are also installed through the lower short pipe flange hole and the equipment flange hole.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. Significant cooling effect: A short cooling tube with a short tube structure is set at the inlet end of the rupture disc. The inside is filled with high-precision heat insulation cotton (fan-shaped or circular cut, with a maximum gap of ≤2mm between the cotton and the tube wall). This can effectively reduce the temperature of superheated steam from 800℃~900℃ to ≤200℃, which is completely within the safe working range of the rupture disc material, ensuring long-term stable performance of the rupture disc and accurate pressure relief.

[0019] 2. Real-time temperature monitoring: A high-range thermocouple (with the measuring end close to but not in contact with the rupture disc, and a range > 800℃) is installed on the outer wall of the cooling short pipe. The signal is transmitted to the DCS control room to realize online display of the rupture disc temperature and alarm for over-limit, providing visual data support for the safe operation of the device and avoiding blind maintenance and unexpected shutdown.

[0020] 3. Modular and easy to maintain: The entire unit consists of an outlet flange, rupture disc, cooling short pipe, bracket, clamping ring, gasket, and equipment flange from top to bottom. Each component is connected by bolts to form an independent module. When inspecting or replacing the rupture disc, only the connecting bolts need to be removed to lift the entire module out without the need for hot work or cutting pipelines, which greatly shortens the inspection time and reduces maintenance costs.

[0021] 4. Multiple seals and zero leakage: The rupture disc can be sealed with a flat, conical, or tongue and groove surface between itself and the outlet flange and cooling short pipe. Combined with high-temperature resistant gaskets (temperature resistance ≥ the equipment's maximum operating temperature), it can maintain a reliable seal under high temperature and high pressure alternating conditions to prevent media leakage.

[0022] 5. Compact structure and low cost: The cooling short tube adopts a cylindrical design, and the internal filling with heat insulation cotton can achieve efficient heat insulation. There is no need for an external cooling medium circulation system. Compared with the traditional water-cooled or air-cooled structure, the volume is reduced by more than 50% and the weight is reduced by more than 40%, significantly reducing manufacturing and installation costs.

[0023] 6. High adaptability: The rupture disc can be selected from the standard arch type, the arched slotted type, or the flat slotted type to match different relief pressure and fatigue life requirements; the bracket adopts an arched or flat structure, and the number and diameter of the through holes can be flexibly adjusted within the range of 20 to 100 and φ2 to 10mm, which not only ensures that the relief channel is 100% unobstructed after rupture, but also ensures that the rupture pressure of the bracket itself does not exceed the rated rupture pressure of the rupture disc, thus avoiding secondary overpressure.

[0024] In summary, this utility model, through the integrated innovation of "short tube insulation + online temperature measurement + modular assembly," completely solves the technical problem of rupture disc failure under high-temperature conditions above 800℃. It has outstanding advantages such as simple structure, high cooling efficiency, reliable sealing, convenient installation and maintenance, real-time monitoring, and low cost. It can be widely used in over-temperature and over-pressure protection scenarios such as steam superheated furnaces, ethylene cracking furnaces, coal gasification, and high-temperature reactors, resulting in significant economic and social benefits. Attached Figure Description

[0025] Figure 1 This is an isometric drawing of the present invention;

[0026] Figure 2 for Figure 1 Structural diagram;

[0027] Figure 3 for Figure 1 Main view;

[0028] Figure 4 This is a top view of the bracket;

[0029] In the diagram: Outlet flange-1, flange disc-11, outlet flange hole-12, flange cone neck-13, rupture disc-2, rupture disc clamping ring-21, rupture disc flange hole-22, rupture disc body-23, insulation cotton-3, cooling short pipe-4, short pipe cylinder-41, upper short pipe flange-42, lower short pipe flange-43, upper short pipe flange hole-44, lower short pipe flange hole-45, thermocouple-5, bracket-6, bracket outer ring-61, bracket main plate-62, bracket through hole-63, clamping ring-7, clamping screw-71, gasket-8, equipment flange-9, equipment flange hole-91. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Please refer to Figure 1-4 , Figure 1 This is an isometric drawing of the present invention; Figure 2 for Figure 1 Structural diagram; Figure 3 for Figure 1 Main view; Figure 4 This is a top view of the bracket.

[0032] This utility model provides a novel monitorable rupture disc cooling device to solve the problem that existing rupture discs cannot withstand high temperatures; it includes, from top to bottom, an outlet flange 1, a rupture disc 2, a cooling short pipe 4, a bracket 6, a clamping ring 7, a gasket 8, and an equipment flange 9. The cooling short pipe 4 is filled with heat insulation cotton 3, and a thermocouple 5 is threadedly fixed on the side wall of the cooling short pipe 4.

[0033] The outlet flange 1 is made of conventional carbon steel and includes a flange disc 11 arranged in a ring shape, with multiple outlet flange holes 12 evenly distributed in the middle of the disc. A flange cone neck 13 is provided on the top surface of the flange disc 11 for welding and fixing to the discharge short pipe of the equipment.

[0034] The rupture disc 2 is the main pressure control element, and can be selected from types such as the standard arch type, the arch slotted type, and the flat slotted type; it includes a circular rupture disc clamping ring 21, on which a rupture disc flange hole 22 is provided, which is coaxial with the outlet flange hole 12; the rupture disc body 23 is fixedly connected to the inner side of the rupture disc clamping ring 21 for rupture; the rupture disc 2 can be sealed with the outlet flange 1 and the cooling short pipe 4 using a planar, conical, or tongue and groove sealing structure; the edge of the rupture disc clamping ring 21 has a sealing gasket for sealing operation.

[0035] The heat insulation cotton 3 completely fills the interior of the cooling short tube 4. Before filling, the heat insulation cotton 3 can be cut into a fan shape or a circle for easy filling; and the maximum gap between it and the cooling short tube 4 is no more than 2mm.

[0036] The cooling short pipe 4 includes a central cylindrical short pipe cylinder 41. An upper short pipe flange 42 and a lower short pipe flange 43 are welded and fixed to the upper and lower ends of the short pipe cylinder 41, respectively. The upper short pipe flange 42 is provided with upper short pipe flange holes 44 that correspond one-to-one with and are coaxial with the outlet flange holes 12. The lower short pipe flange 43 is provided with a plurality of lower short pipe flange holes 45 evenly distributed in a ring. The interior of the short pipe cylinder 41 is filled with heat insulation cotton 3, and a thermocouple 5 is threadedly installed on the outer wall of the short pipe cylinder 41.

[0037] Connecting bolts are installed through the outlet flange hole 12, the rupture disc flange hole 22, and the upper short pipe flange hole 44 to connect and fix the outlet flange 1, the rupture disc 2, and the cooling short pipe 4 into a whole.

[0038] The thermocouple 5 is installed on the cooling short tube 4, with its temperature measuring end close to the position of the rupture disc 2, but not in contact with the rupture disc 2 to avoid damaging the rupture disc 2, and is used to monitor the real-time temperature of the rupture disc; the temperature measuring range of the thermocouple 5 is greater than 800℃; the thermocouple 5 is remotely connected to the DCS control room to monitor and warn of the temperature at the position of the rupture disc 2 in real time.

[0039] The bracket 6 is installed at the bottom end of the cooling short pipe 4 to prevent the insulation cotton 3 from falling into the equipment. The bracket 6 has an arched or flat structure, including a circular outer ring 61. The inner side of the outer ring 61 is fixed to the main plate 62. The main plate 62 has multiple through holes 63, which are distributed radially along the main plate 62. The number of through holes 63 is 20-100, and the diameter is 2-10mm. The burst pressure of the bracket 6 is not higher than the burst pressure of the bursting disc 2, and the venting channel is fully opened after the burst.

[0040] The clamping ring 7 is used to fix the bracket 6. The clamping ring 7 is circular and has a plurality of clamping screws 71 evenly distributed on it. The bracket 6 is fixed to the bottom end of the cooling short tube 4 by the clamping screws 71 and the clamping ring 7.

[0041] The gasket 8 is a high-temperature resistant gasket, and its temperature resistance is not lower than the maximum operating temperature of the equipment, thereby achieving a high-temperature seal between the clamping ring 7 and the equipment flange 9.

[0042] The equipment flange 9 is connected to the user equipment, and a plurality of equipment flange holes 91 are evenly distributed in a ring on it. The equipment flange holes 91 correspond one-to-one with the lower short pipe flange holes 45 and are coaxially arranged. Connecting bolts are installed through the lower short pipe flange holes 45 and the equipment flange holes 91 to connect the cooling short pipe 4 and the equipment flange 9 into a whole, and at the same time clamp and fix the bracket 6 and the clamping ring 7.

[0043] The clamping ring 7, the equipment flange 9, and the lower short pipe flange 43 are all made of high-temperature and corrosion-resistant materials.

[0044] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. A novel monitorable rupture disc cooling device, characterized in that: The equipment includes, from top to bottom, an outlet flange (1), a rupture disc (2), a cooling short pipe (4), a bracket (6), a clamping ring (7), a gasket (8), and an equipment flange (9). The cooling short pipe (4) is filled with heat insulation cotton (3), and a thermocouple (5) is threaded onto the side wall of the cooling short pipe (4). The outlet flange (1) includes a flange disc (11) arranged in a circular shape with multiple outlet flange holes (12) evenly distributed in the middle. A flange cone neck (13) is provided on the top surface of the flange disc (11). The rupture disc (2) includes a circular rupture disc clamping ring (21) with a rupture disc flange hole (22) coaxial with the outlet flange hole (12). A rupture disc body (23) is fixed to the inner side of the rupture disc clamping ring (21). The cooling short pipe (4) includes a cylindrical middle section. A short pipe cylinder (41) is welded and fixed at its upper and lower ends respectively with an upper short pipe flange (42) and a lower short pipe flange (43). The upper short pipe flange (42) is provided with an upper short pipe flange hole (44) that corresponds one-to-one with the outlet flange hole (12) and is coaxial. The lower short pipe flange (43) is provided with a plurality of lower short pipe flange holes (45) evenly distributed in a ring. The bracket (6) includes a circular bracket outer ring (61) and a bracket main plate (62) fixed to its inner side. The bracket main plate (62) is machined with a plurality of bracket through holes (63). The clamping ring (7) is circular and is provided with a plurality of clamping screws (71) evenly distributed in a ring. The equipment flange (9) is provided with a plurality of equipment flange holes (91) evenly distributed in a ring. The equipment flange holes (91) correspond one-to-one with the lower short pipe flange holes (45) and are coaxial.

2. The novel monitorable rupture disc cooling device according to claim 1, characterized in that: The clamping ring (7), the equipment flange (9), and the lower short pipe flange (43) are made of high-temperature and corrosion-resistant materials.

3. The novel monitorable rupture disc cooling device according to claim 1, characterized in that: The rupture disc (2) is of the standard arch type, the arch slit type, or the flat slit type; the edge of the rupture disc clamping ring (21) is equipped with a sealing gasket.

4. The novel monitorable rupture disc cooling device according to claim 1, characterized in that: The rupture disc (2) is sealed with the outlet flange (1) and the cooling short pipe (4) using a planar, conical, or tongue-and-groove sealing structure.

5. The novel monitorable rupture disc cooling device according to claim 1, characterized in that: The insulation cotton (3) is cut into a fan shape or a circle before filling, and the maximum gap between it and the cooling short tube (4) is no more than 2 mm.

6. The novel monitorable rupture disc cooling device according to claim 1, characterized in that: The inside of the short tube cylinder (41) is filled with heat insulation cotton (3), and a thermocouple (5) is threaded on the outer wall of the short tube cylinder (41).

7. The novel monitorable rupture disc cooling device according to claim 1, characterized in that: The thermocouple (5) has a temperature measuring end that is close to the rupture disc (2) but does not contact the rupture disc (2); the far end of the thermocouple (5) is connected to the DCS control room; the temperature measuring range of the thermocouple (5) is greater than 800℃.

8. The novel monitorable rupture disc cooling device according to claim 1, characterized in that: The bracket (6) has an arched or flat structure; the bracket through holes (63) are distributed radially along the main bracket (62), with a number of 20-100 and a diameter of 2-10mm; the burst pressure of the bracket (6) is not higher than the burst pressure of the bursting disc (2), and the venting channel is fully opened after the burst.

9. The novel monitorable rupture disc cooling device according to claim 1, characterized in that: The gasket (8) is a high-temperature resistant gasket, and its temperature resistance is not lower than the maximum operating temperature of the equipment.

10. The novel monitorable rupture disc cooling device according to any one of claims 1-9, characterized in that: Connecting bolts are installed through the outlet flange hole (12), the rupture disc flange hole (22), and the upper short pipe flange hole (44); connecting bolts are also installed through the lower short pipe flange hole (45) and the equipment flange hole (91).

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