Pipeline explosion-proof device applied to RTO system
By combining flame arresters and explosion venting discs in the RTO system, the problems of incomplete flame arrest and high explosion venting risk in existing devices are solved, achieving a safe and reliable explosion-proof effect, and facilitating rapid assembly and maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-24
AI Technical Summary
The existing RTO system's explosion-proof devices are not completely fire-stopping, resulting in a high risk of explosion leakage and potential dangers to surrounding personnel and equipment from the spread of explosion flames and flying parts.
The design combines flame arrestor elements and explosion venting discs. The flame arrestor elements extinguish the flame through a porous structure, while the explosion venting discs rapidly rupture to release pressure when overpressure occurs. The explosion venting guides the gas to be discharged in a specific direction, and the flange connection enables rapid assembly and maintenance.
It effectively prevents the spread of the explosion, reduces the destructive power of the explosion, avoids random spraying that could cause damage to surrounding equipment and personnel, and the device is easy to assemble and maintain quickly.
Smart Images
Figure CN224024103U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to exhaust treatment equipment technical field especially is applied to a pipeline explosion -proof device for RTO system. BACKGROUND
[0002] RTO (regenerative thermal oxidizer) is a kind of waste gas treatment equipment that organic matter (VOCs) in waste gas is oxidized into corresponding carbon dioxide and water at high temperature, mainly by purifying waste gas, and recycling the heat released when waste gas is decomposed, since waste gas is high concentration waste gas, when RTO system handles organic waste gas, explosion can be caused in pipeline due to waste gas concentration exceeding standard, spark introduction or static electricity etc.;Therefore, explosion -proof device is usually installed on pipeline, so that it can be broken through by explosion -proof device when the pressure in pipeline is higher than a certain value, so as to discharge waste gas in pipeline, and the pressure in pipeline is restored to normal.
[0003] However, the existing explosion -proof device has problems such as incomplete fire blocking, uncontrollable explosion direction, etc., when the explosion -proof device is broken, a large flame is generated and part of the components can fly out to cause potential danger to surrounding workers, machines and equipment, so that it is difficult to effectively guarantee the safety of RTO pipeline system.
[0004] Therefore, an explosion -proof device integrating fire blocking and directional explosion venting is urgently needed to improve the explosion -proof performance of RTO system. INVENTION CONTENTS
[0005] In order to solve the technical defects proposed in the above background art, the purpose of the utility model is to provide a pipeline explosion -proof device applied to RTO system, which combines fire blocking and directional explosion venting to solve the problems of incomplete explosion -proof and high explosion venting risk of existing RTO pipeline.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0007] A pipeline explosion -proof device applied to RTO system, comprising RTO pipeline and flange assembly connected to RTO pipeline, one end of the flange assembly is fixedly installed with fire blocking element for blocking explosion flame propagation, the fire blocking element and the pipeline are further provided with explosion venting sheet for venting pipeline pressure, the explosion venting sheet is arranged between adjacent two flange assemblies and blocked in RTO pipeline;One end of the fire blocking element is sealingly connected with RTO pipeline through flange assembly, the other end is connected with explosion venting guide for guiding directional discharge of gas, the explosion venting guide is arranged around the fire blocking element, and the explosion venting guide is connected with the explosion venting sheet;The fire blocking element, explosion venting sheet and explosion venting guide are collinear with the axis of RTO pipeline.
[0008] Preferably, the fire-retardant element is a hollow cylindrical structure with an opening at one end, and the fire-retardant element is in communication with the RTO pipeline and forms a directional explosion venting channel; a plurality of through holes are uniformly distributed on the outer peripheral surface of the fire-retardant element, and the through holes are arranged in a spiral shape or a matrix shape.
[0009] Preferably, the explosion venting sheet is provided with a weak structure near the center position for rapid rupture when the RTO pipeline is over-pressured, and the weak structure includes cross-shaped notches, V-shaped grooves or grid notches.
[0010] Preferably, the explosion venting guide is a fan-shaped, conical or horn-shaped structure, and a plurality of connecting pieces are circumferentially distributed on the side of the explosion venting guide facing the fire-retardant element, and the two ends of the connecting piece are fixedly connected to the explosion venting guide and the fire-retardant element, respectively.
[0011] Preferably, the RTO pipeline is further provided with a pressure detector for monitoring the gas pressure in the pipeline in real time, and the pressure detector is connected to the explosion venting sheet through signal linkage and triggers an alarm when the detected pressure exceeds a set threshold.
[0012] Preferably, the flange assembly is composed of an annular flange plate, and the flange plate is fixed to one end of the RTO pipeline and the fire-retardant element, and the flange plate is provided with a quick disassembly structure.
[0013] Preferably, the quick disassembly structure includes a positioning hole, a quick release bolt and a fastening nut, the positioning hole is circumferentially arranged on the outer peripheral edge of the flange plate, the quick release bolt passes through the positioning hole and is locked by the fastening nut.
[0014] Preferably, the sealing assembly is further included, and the sealing assembly includes, from inside to outside, a sealing gasket, an O-shaped sealing ring and a fireproof gasket, and the sealing gasket, the O-shaped sealing ring and the fireproof gasket are arranged at the connection between the flange assembly and the RTO pipeline, the fire-retardant element and the explosion venting sheet, respectively.
[0015] In summary, the beneficial effects of the present application are:
[0016] The present application sets the explosion venting sheet and the fire-retardant element on the RTO pipeline, the fire-retardant element extinguishes the flame through the "slit effect" and prevents the spread of explosion, the explosion venting sheet rapidly releases the overpressure and reduces the destructive power of explosion, thereby achieving the dual explosion-proof function, the explosion venting guide is used to guide the directional discharge of gas, thereby avoiding the harm to the surrounding equipment and personnel caused by irregular injection, and the flange connection mode between the RTO pipeline and the explosion-proof device facilitates quick assembly and simple disassembly and maintenance. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a structural schematic view of the pipeline explosion-proof device applied to the RTO system of the present application;
[0018] Figure 2 is another side structure schematic view of the pipeline explosion-proof device applied to the RTO system of the utility model;
[0019] Figure 3 is the explosion view of the pipeline explosion-proof device applied to the RTO system of the utility model;
[0020] Figure 4 is the front view of the pipeline explosion-proof device applied to the RTO system of the utility model;
[0021] Figure 5 is Figure 4 the sectional view of A-A face in it;
[0022] Figure 6 is Figure 5 the enlarged view of structure at a in it.
[0023] The reference signs in the drawings are explained as follows:
[0024] 1, RTO pipeline;2, flange assembly;3, fire blocking element;31, through hole;4, explosion venting sheet;41, weak structure;5, explosion venting guide;51, connecting sheet;6, pressure detector;7, quick disassembly structure;71, positioning hole;72, quick disassembly bolt;73, fastening nut;8, sealing assembly;81, sealing ring;82, sealing gasket;83, fireproof gasket. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. All other embodiments obtained by the ordinary skilled in the art based on the embodiments in the utility model belong to the scope of protection of the utility model.
[0026] The skilled in the art should understand that in the disclosure of the utility model, the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the utility model.
[0027] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.
[0028] The following is in conjunction with the appendix Figures 1-6 The present invention provides a more detailed description of an embodiment of a pipeline explosion-proof device applied to an RTO system.
[0029] An explosion-proof device for pipelines used in RTO systems, such as Figures 1 to 3 As shown, the device includes an RTO pipe 1 and a flange assembly 2 connected to the RTO pipe 1. One end of the flange assembly 2 is fixedly installed with a flame arrestor element 3 for blocking the propagation of an explosion flame. A pressure relief disc 4 for relieving pressure in the pipe is also installed between the flame arrestor element 3 and the pipe. The pressure relief disc 4 is disposed between two adjacent flange assemblies 2 and sealed inside the RTO pipe 1. One end of the flame arrestor element is sealed to the RTO pipe 1 through the flange assembly 2, and the other end is connected to a pressure relief guide 5 for guiding the directional discharge of gas. The pressure relief guide 5 is arranged around the flame arrestor element 3 and is connected to the pressure relief disc 4. The flame arrestor element 3, the pressure relief disc 4, and the pressure relief guide 5 are collinear with the axis of the RTO pipe 1.
[0030] Specifically, organic waste gas enters RTO pipe 1 through the porous structure of flame arrestor 3. Flame arrestor 3 does not significantly obstruct airflow and also provides preliminary spark filtration. In the event of an explosion: When an explosion occurs inside the pipe and the flame propagates towards flame arrestor 3, the porous structure divides the flame into multiple smaller flames. The pore walls absorb heat, lowering the flame temperature below the ignition point, thereby extinguishing the flame and preventing the explosion from spreading. The high-pressure gas generated by the explosion causes a sudden increase in pressure inside RTO pipe 1. When the pressure reaches the rupture threshold of the explosion relief disc 4, the disc 4 ruptures rapidly, releasing the high-pressure gas. The explosion relief guide 5 guides the gas to discharge in a preset direction, avoiding impact on surrounding equipment and personnel, thereby improving the safety and reliability of the RTO system.
[0031] In this embodiment, as Figure 4 As shown, the flame arrestor element 3 is a hollow cylindrical structure with an opening at one end, and the flame arrestor element 3 is connected to the RTO pipeline 1 to form a directional explosion relief channel; multiple through holes 31 are evenly distributed on the outer peripheral surface of the flame arrestor element 3, and the through holes 31 are arranged in a spiral or matrix shape.
[0032] Specifically, the fire blocking element 3 is a cylindrical porous structure made of 304 stainless steel or cordierite ceramic, with a pore density of 200-400 mesh and a pore diameter of 0.1-0.5 mm. The fire blocking element 3 is embedded in the grooves of the flange assembly 2 at both ends, fixed by interference fit or welding, to ensure the sealed connection between the fire blocking element 3 and the flange assembly 2. The design of the porous structure is based on the "slit effect". When the explosion flame passes through the pores, the heat exchange between the flame and the pore wall is intensified, resulting in a decrease in flame temperature and ultimately extinguishing the flame.
[0033] It is worth mentioning that the fire blocking element 3 can also be designed as a multi-layer porous structure, with each layer of pores staggered in direction, further improving the fire blocking efficiency; or coated with a catalytic material on the surface of the pores to accelerate the decomposition of combustible materials in the exhaust gas
[0034] In this embodiment, as shown in Figure 3 , the explosion venting sheet 4 is pre-provided with a weak structure 41 for rapid rupture when the RTO pipeline 1 is over-pressurized, which includes cross-cut, V-shaped groove or grid-cut.
[0035] Specifically, the explosion venting sheet 4 is clamped between the explosion venting section of the RTO pipeline 1 and the two flanges, and is fixed to the outside of the flange assembly 2 by bolts and sealed inside the RTO pipeline 1. The explosion venting sheet 4 is a circular metal sheet made of aluminum alloy or stainless steel with a thickness of 0.5-2 mm, and is pre-provided with a cross-cut or V-shaped groove as a pre-provided weak structure 41 in the center, with a cut depth of 0.5 mm. When the internal pressure of the pipeline exceeds 0.1 MPa, the explosion venting sheet 4 ruptures along the cut, achieving rapid pressure relief; and a venting guide 5 is welded to the end of the fire blocking element 3.
[0036] In this embodiment, as shown in Figure 5 , the explosion venting guide 5 is a fan-shaped, conical or horn-shaped structure, and the side of the explosion venting guide 5 facing the fire blocking element 3 is circumferentially provided with a plurality of connecting pieces 51, the two ends of the connecting pieces 51 being fixedly connected to the explosion venting guide 5 and the fire blocking element 3, respectively.
[0037] Specifically, the explosion venting guide 5 is a fan-shaped flow guide cover made of carbon steel or glass steel, with a cover opening angle of 60°-120°, and is fixed to the outside of the flange assembly 2 by a support. The inner wall of the flow guide cover is provided with a flow guide groove to guide the high-pressure gas during venting to a safe direction away from the RTO equipment and the operating area. When the explosion venting guide 5 is in the form of a horn-shaped structure, the expansion angle is 45°. Meanwhile, four arc-shaped connecting pieces 51 are welded to the inside of the explosion venting guide 5, and the other ends of the connecting pieces 51 are fixed to the outer wall of the fire blocking element 3 by bolts. The explosion gas is directed to discharge outward and upward through the explosion venting guide 5, avoiding horizontal splashing.
[0038] It is worth mentioning that the conical flow guide can be used to replace the fan-shaped flow guide cover to enhance the effect of concentrated discharge of air flow, or the sound-absorbing material is arranged on the inner wall of the flow guide structure to reduce the noise during the explosion venting.
[0039] In the embodiment, a pressure detector 6 (not shown in the figure) for detecting the air pressure in the pipeline in real time is arranged on the RTO pipeline 1, and the pressure detector 6 (not shown in the figure) is connected with the explosion venting sheet 4 through signal linkage, and an alarm is triggered when the detected pressure exceeds the set threshold.
[0040] Specifically, the pressure detector 6 (not shown in the figure) can feed back the pressure change in the RTO pipeline 1 in real time, and when the pressure exceeds the set threshold, a signal is triggered to the control system and the RTO system is linked to stop, and at the same time the auxiliary explosion venting sheet 4 is quickly broken, so as to ensure the safety of the RTO system.
[0041] In the embodiment, as shown in Figure 3 The flange assembly 2 is composed of an annular flange plate, the flange plate is fixed to one end of the RTO pipeline 1 and the flame arrestment element 3, and the flange plate is provided with a quick disassembly structure 7; the quick disassembly structure 7 includes a positioning hole 71, a quick disassembly bolt 72 and a fastening nut 73, the positioning hole 71 is circumferentially arranged on the outer peripheral edge of the flange plate, the quick disassembly bolt 72 passes through the positioning hole 71 and is locked by the fastening nut 73.
[0042] Specifically, the flange assembly 2 is composed of two annular flange plates, and the inner side of the flange plate is provided with an annular groove for mounting the sealing assembly 8, the flange plate is made of stainless steel or carbon steel, and the surface is treated by corrosion protection. The flange plate is uniformly distributed with 8-16 bolt holes, the bolt hole diameter matches the bolt hole of the RTO pipeline 1 flange, the quick disassembly bolt 72 is inserted into the hole and is locked by the butterfly fastening nut 73, forming a detachable sealing structure.
[0043] As shown in Figure 6 It is worth noting that, in order to ensure the sealing performance of the connection between the components, the device further comprises a sealing assembly 8, the sealing assembly 8 comprises, from inside to outside, a sealing gasket 82, an O-shaped sealing ring 81 and a fireproof gasket 83, the sealing gasket 82, the O-shaped sealing ring 81 and the fireproof gasket 83 are arranged at the connection between the flange assembly 2 and the RTO pipeline 1, the flame arrestment element 3 and the explosion venting sheet 4.
[0044] In another embodiment, the sealing assembly 8 adopts a multi-layer composite structure: a ceramic fiber fireproof gasket 83 close to the pipeline side, a graphite sealing gasket 82 in the middle, and a fluororubber O-shaped ring on the outer layer. The sealing groove depth of the flange plate is 3mm, which ensures that the multi-layer sealing element is tightly fitted after being pressed.
[0045] The working process of the utility model is as follows:
[0046] When overpressure is generated in the RTO pipeline 1 due to explosion, the pressure detector 6 (not shown in the figure) monitors the overpressure in real time, triggers an audible and light alarm, and simultaneously triggers the RTO system to stop running, and controls the rupture disc 4 to break preferentially, so that the high-pressure gas carrying the flame enters the flame arrestor 3, the flame is divided when passing through the through hole 31 on the flame arrestor 3, and the flame is extinguished by cooling, at the same time, the gas flow is guided by the gas discharge guide 5 to a preset safe direction for discharge, the pressure is released, and the safety of the RTO pipeline 1 system is ensured.
[0047] The embodiments of the present specific embodiment are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.
Claims
1. A pipeline explosion-proof device for RTO systems, comprising an RTO pipeline and a flange assembly connected to the RTO pipeline, characterized in that, One end of the flange assembly is fixedly equipped with a flame arrestor element for blocking the propagation of an explosion flame. A pressure relief disc for relieving pipeline pressure is also installed between the flame arrestor element and the pipeline. The pressure relief disc is disposed between two adjacent flange assemblies and sealed inside the RTO pipeline. One end of the flame arrestor element is sealed to the RTO pipeline through the flange assembly, and the other end is connected to a pressure relief guide for guiding the directional discharge of gas. The pressure relief guide is arranged around the flame arrestor element and is connected in conjunction with the pressure relief disc. The flame arrestor element, pressure relief disc, and pressure relief guide are collinear with the axis of the RTO pipeline.
2. The pipeline explosion-proof device applied to an RTO system according to claim 1, characterized in that, The flame arrestor is a hollow cylindrical structure with an opening at one end, and the flame arrestor is connected to the RTO pipeline to form a directional explosion relief channel; the outer circumferential surface of the flame arrestor is uniformly covered with multiple through holes, which are arranged in a spiral or matrix shape.
3. The pipeline explosion-proof device applied to an RTO system according to claim 1, characterized in that, The venting disc has a pre-set weak structure near its center for rapid rupture when the RTO pipeline is overpressured. The weak structure includes cross-shaped grooves, V-shaped grooves, or grid grooves.
4. The pipeline explosion-proof device applied to an RTO system according to claim 1, characterized in that, The explosion venting guide is a fan-shaped, cone-shaped, or trumpet-shaped structure, and multiple connecting pieces are distributed circumferentially on the side of the explosion venting guide facing the flame arrester. The two ends of the connecting pieces are fixedly connected to the explosion venting guide and the flame arrester, respectively.
5. The pipeline explosion-proof device applied to an RTO system according to claim 1, characterized in that, The RTO pipeline is also equipped with a pressure detector for real-time monitoring of the gas pressure inside the pipeline. The pressure detector is connected to the explosion relief plate via signal linkage, and an alarm is triggered when the detected pressure exceeds a set threshold.
6. The pipeline explosion-proof device applied to an RTO system according to claim 1, characterized in that, The flange assembly consists of an annular flange, which is fixed to one end of the RTO pipeline and the flame arrestor element, and the flange is equipped with a quick-release structure.
7. The pipeline explosion-proof device applied to an RTO system according to claim 6, characterized in that, The quick-release structure includes a positioning hole, a quick-release bolt, and a fastening nut. The positioning hole is circumferentially located on the outer peripheral edge of the flange. The quick-release bolt passes through the positioning hole and is locked to the adjacent flange by the fastening nut.
8. The pipeline explosion-proof device applied to an RTO system according to claim 1, characterized in that, It also includes a sealing assembly, which consists of a sealing gasket, an O-ring, and a fireproof gasket from the inside out. The sealing gasket, O-ring, and fireproof gasket are respectively disposed at the connection between the flange assembly and the RTO pipeline, the flame arrestor, and the explosion relief disc.