Explosion venting device for preventing backflow of condensed water
By installing an explosion-proof device to prevent condensate backflow on the gas generator set, and using a sealing gasket and drive mechanism to control the flow of high-temperature flue gas, the problem of condensate backflow is solved, ensuring normal operation of the unit and extending its service life, which is economically beneficial.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING YONDER ENVIRONMENT TECH CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-12
AI Technical Summary
When existing gas generator sets are connected in parallel for flue gas exhaust, condensate in the high-temperature flue gas can easily flow back into the unit, affecting startup and lifespan.
The explosion relief device, which prevents condensate backflow, includes a sealed housing, an inlet pipe, an outlet pipe, an explosion relief valve, and a drain valve. The movement of the sealing gasket is controlled by a drive mechanism to ensure that high-temperature flue gas does not flow back when the unit is shut down or under maintenance, and condensate is discharged through the drain pipe.
It effectively prevents condensate backflow, protects the unit during startup and extends its service life, has a simple structure, is easy to operate, and saves costs.
Smart Images
Figure CN224229256U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mine gas power generation technology, specifically to an explosion relief device for preventing condensate backflow. Background Technology
[0002] Coalbed methane, commonly known as "gas," is mainly composed of CH4 (methane). It is a by-product gas primarily found in coal mines and is both a strong greenhouse gas and a hazard to coal mine safety, as well as a highly efficient clean energy source. Furthermore, the large amounts of gas released into the atmosphere during coal production significantly increase carbon emissions in coal mining areas, causing severe environmental pollution and failing to meet the national requirements for building green mines. Therefore, coal mines utilize low-concentration gas obtained during mining for power generation. This reduces the risk of coal mine gas explosions, increases the supply of clean energy, and reduces greenhouse gas emissions, thus achieving the multiple goals of protecting life, resources, and the environment.
[0003] For low-concentration gas generator sets, only about 35% of the fuel energy is converted into electrical energy by the generator set, about 30%-35% of the fuel energy is discharged by high-temperature flue gas, and about 20%-25% of the fuel energy is carried away by the generator set's cooling water. Therefore, most of the high-temperature flue gas generated by gas power generation is recovered and utilized through boilers or other equipment for waste heat recovery.
[0004] The existing technology involves connecting the high-temperature flue gas discharged from gas generator sets in parallel into the same main pipe for waste heat utilization by boilers or other equipment. Each gas generator set's high-temperature flue gas branch pipe is equipped with two devices: a high-temperature flue gas valve and an explosion relief valve. Because the high-temperature flue gas valves generally have an internal leakage of more than 3%, when multiple gas generator sets are connected in parallel for flue gas discharge, if one gas generator set is shut down or under maintenance, the high-temperature flue gas discharged from the remaining gas generator sets will flow towards the shut-down or under-maintenance gas generator set through the internal leakage of the high-temperature flue gas valve. The high-temperature flue gas contains water generated from the combustion of methane. After the temperature drops, condensate will flow into the gas generator set through the high-temperature flue gas pipe, affecting the start-up and lifespan of the gas generator set. Utility Model Content
[0005] The purpose of this invention is to provide an explosion relief device that prevents condensate backflow, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: an explosion relief device for preventing condensate backflow, comprising a sealed housing, wherein an air inlet pipe and an air outlet pipe are respectively connected to the side of the sealed housing, and an explosion relief valve and a drain valve are respectively provided at the top and bottom of the sealed housing.
[0007] The top of the sealing housing is also provided with a sealing cylinder that is connected to the sealing housing. The inside of the sealing cylinder is provided with a first sealing gasket that can slide along the inner wall of the sealing cylinder. The outer end of the sealing cylinder is provided with a driving mechanism for driving the first sealing gasket to move. A second sealing gasket is provided on the side of the first sealing gasket away from the outer end of the sealing cylinder. The air inlet pipe extends into the inside of the sealing housing, and the air outlet of the air inlet pipe located inside the sealing housing faces the second sealing gasket.
[0008] Preferably, the driving mechanism includes a screw rotatably disposed inside the sealing cylinder, and a guide plate slidably disposed inside the sealing cylinder. The guide plate has a threaded hole that is threadedly engaged with the screw. A guide rail is disposed on the inner wall of the upper half of the sealing cylinder, and a guide groove is disposed on the guide plate that is engaged with the guide rail.
[0009] Preferably, the top of the sealing cylinder is provided with a cap, and the screw passes through the cap and is connected to the cap through a bearing seat.
[0010] Preferably, the first sealing gasket and the guide plate are connected by a first connecting rod, and the first sealing gasket and the second sealing gasket are connected by a second connecting rod.
[0011] Preferably, the portion of the intake pipe located inside the sealing housing has an upwardly bent section, the opening of which faces the second sealing gasket, and a concave sealing opening is provided at the opening of the bent section.
[0012] Preferably, the top end of the screw is provided with a coaxially arranged rotating handle.
[0013] Preferably, a drain pipe is connected to the bottom of the sealed housing, and a drain valve is disposed on the drain pipe.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. This utility model relates to an explosion relief device installed on the high-temperature exhaust pipe of a gas generator set to prevent condensate backflow. This device can replace two separate sets of equipment: a high-temperature flue gas valve and an explosion relief valve. When multiple gas generator sets are connected in parallel for exhaust, if one gas generator set is shut down or under maintenance, the second sealing gasket will descend until it coincides with the sealing port of the intake pipe. The second sealing gasket will form a seal at the outlet of the intake pipe, ensuring that there is a barrier between the inside of the sealing housing and the intake pipe. Therefore, the high-temperature flue gas generated by other gas generator sets can only flow back into the inside of the sealing housing. The condensate generated by the high-temperature flue gas due to the temperature drop will be discharged from the drainage part below the sealing housing, preventing the condensate generated by the backflow of high-temperature flue gas from entering the gas generator set and thus affecting the start-up and lifespan of the gas generator set.
[0016] 2. This utility model has a simple and compact structure, is easy and flexible to operate, saves costs, and has high economic benefits. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 The internal structure of this utility model Figure 1 ;
[0019] Figure 3 The internal structure of this utility model Figure 2 ;
[0020] Figure 4 The structure of the driving structure of this utility model Figure 1 ;
[0021] Figure 5 The structure of the driving structure of this utility model Figure 2 .
[0022] In the picture:
[0023] 1-Sealed housing,
[0024] 2- Explosion relief valve,
[0025] 3-Intake pipe, 31-Bend, 32-Sealing port
[0026] 4-Exhaust pipe,
[0027] 5-Drain valve, 51-Drain pipe
[0028] 61-Sealing cylinder, 611-Guide rail, 612-Cap, 62-First sealing gasket, 63-Second sealing gasket, 64-Guide plate, 641-Threaded hole, 642-Guide groove, 65-Screw, 651-Rotating handle, 66-First connecting rod, 67-Second connecting rod. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0030] like Figures 1 to 5 As shown, an explosion relief device for preventing condensate backflow includes a sealed housing 1. An air inlet pipe 3 and an air outlet pipe 4 are respectively connected to the side of the sealed housing 1. An explosion relief valve 2 and a drain valve 5 are respectively provided at the top and bottom of the sealed housing 1.
[0031] The top of the sealing housing 1 is also provided with a sealing cylinder 61 that is connected to the sealing housing 1. The interior of the sealing cylinder 61 is provided with a first sealing gasket 62 that can slide along the inner wall of the sealing cylinder 61. The outer end of the sealing cylinder 61 (with the end of the sealing cylinder 61 outside the sealing housing 1 as the outer end) is provided with a driving mechanism for driving the first sealing gasket 62 to move. A second sealing gasket 63 is provided on the side of the first sealing gasket 62 away from the outer end of the sealing cylinder 61. The air inlet pipe 3 extends into the interior of the sealing housing 1, and the air outlet of the air inlet pipe 3 located inside the sealing housing 1 faces the second sealing gasket 63.
[0032] It should be noted that in this embodiment, the first sealing gasket 62 is always in close contact with the sealing cylinder 61. The function of the first sealing gasket 62 is to seal and ensure that the sealing cylinder 61 does not leak air.
[0033] Specifically, in this embodiment, the sealing cylinder 61 is fixedly connected to the sealing housing 1 by welding. The upper half of the sealing cylinder 61 is located outside the sealing housing 1, and the lower half of the sealing cylinder 61 is located inside the sealing housing 1. Fixing by welding can ensure the connection strength between the sealing cylinder 61 and the sealing housing 1, and the welding can ensure the sealing of the connection point between the sealing cylinder 61 and the sealing housing 1.
[0034] In one specific embodiment, the driving mechanism includes a screw 65 rotatably disposed inside the sealing cylinder 61, and a guide plate 64 slidably disposed inside the sealing cylinder 61. The guide plate 64 has a threaded hole 641 that threadedly engages with the screw 65. A guide rail 611 is disposed on the inner wall of the upper half of the sealing cylinder 61, and a guide groove 642 that engages with the guide rail 611 is disposed on the guide plate 64. The guide rail 611 is arranged along the extending direction of the sealing cylinder 61. Through the limiting engagement of the guide rail 611 and the guide groove 642, the guide plate 64 can only move along the extending direction of the sealing cylinder 61. By rotating the screw 65, the guide plate 64 is moved under the action of the thread. By adjusting the rotation direction of the screw 65, the moving direction of the guide plate 64 is changed, causing the guide plate 64 and the second sealing gasket 63 to move away from or towards the air outlet of the air inlet pipe 3. When the second sealing gasket 63 moves away from the air outlet of the air inlet pipe 3 (e.g....), Figure 2 When the second sealing gasket 63 is near the air outlet of the air inlet pipe 3, air can pass through normally; Figure 3 The air outlet of the air inlet pipe 3 is blocked by the second sealing gasket 63 to prevent condensate from flowing back into the air inlet pipe 3.
[0035] Specifically, in this embodiment, a cap 612 is provided on the top of the sealing cylinder 61, and the screw 65 passes through the cap 612 and is connected to the cap 612 through a bearing seat.
[0036] Specifically, in this embodiment, the first sealing gasket 62 and the guide plate 64 are connected by a first connecting rod 66, and the first sealing gasket 62 and the second sealing gasket 63 are connected by a second connecting rod 67.
[0037] Specifically, in this embodiment, the portion of the intake pipe 3 located inside the sealing housing 1 is provided with an upwardly bent portion 31. The opening of the bent portion 31 faces the second sealing gasket 63, and a concave sealing port 32 is provided at the opening of the bent portion 31 to increase the contact sealing between the second sealing gasket 63 and the intake pipe 3.
[0038] Specifically, in this embodiment, a rotating handle 651 is provided at the top of the screw 65, which is arranged coaxially, so that the screw 65 can be easily rotated and adjusted by rotating the handle 651.
[0039] Specifically, in this embodiment, a drain pipe 51 is provided at the bottom of the sealing housing 1, and a drain valve 5 is provided on the drain pipe 51.
[0040] Working principle: When in use, the high-temperature flue gas exhaust pipe of the gas generator set is connected to the air inlet pipe 3 of this device. The high-temperature flue gas exhaust pipes of multiple gas generator sets are connected to the same main pipe for collecting high-temperature flue gas through this device. Specifically, the exhaust pipe 4 of this device is connected to the same main pipe for collecting high-temperature flue gas.
[0041] When the gas generator set is running normally, rotate the rotating handle 651 to raise the second sealing gasket 63 to an appropriate height. The high-temperature flue gas discharged from the gas generator set enters the interior of the sealing housing 1 through the inlet pipe 3, and then exits the sealing housing 1 through the outlet pipe 4. The high-temperature flue gas eventually flows into the same main pipe and enters the boiler or other equipment for waste heat utilization. In this way, the flow of high-temperature flue gas forms a connected channel, and the explosion relief valve 2 on the sealing housing 1 has the function of explosion relief.
[0042] When the gas generator set is shut down or under maintenance, rotating the handle 651 lowers the second sealing gasket 63 until it aligns with the sealing port 32 of the intake pipe 3. The second sealing gasket 63 forms a seal at the outlet of the intake pipe 3, ensuring a barrier between the inside of the sealing housing 1 and the intake pipe 3. High-temperature flue gas from other gas generator sets can only flow back into the sealing housing 1 through the outlet pipe 4, and cannot enter the intake pipe 3, thus preventing it from entering the gas generator set. Furthermore, the explosion relief valve 2 on the sealing housing 1 is connected to the outlet pipe 4, providing explosion relief functionality. The high-temperature flue gas contains water generated from the combustion of methane. Condensation due to the temperature drop is discharged from the drain pipe 51 and drain valve 5 below the sealing housing 1. Therefore, it prevents condensation from the backflow of high-temperature flue gas from entering the gas generator set, which could affect its startup and lifespan.
[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. An explosion relief device for preventing condensate backflow, characterized in that: It includes a sealed housing, with an air inlet pipe and an air outlet pipe respectively connected to the sides of the sealed housing, and an explosion relief valve and a drain valve respectively provided at the top and bottom of the sealed housing; The top of the sealing housing is also provided with a sealing cylinder that is connected to the sealing housing. The inside of the sealing cylinder is provided with a first sealing gasket that can slide along the inner wall of the sealing cylinder. The outer end of the sealing cylinder is provided with a driving mechanism for driving the first sealing gasket to move. A second sealing gasket is provided on the side of the first sealing gasket away from the outer end of the sealing cylinder. The air inlet pipe extends into the inside of the sealing housing, and the air outlet of the air inlet pipe located inside the sealing housing faces the second sealing gasket.
2. The explosion relief device for preventing condensate backflow according to claim 1, characterized in that: The driving mechanism includes a screw rotatably disposed inside the sealing cylinder, and a guide plate slidably disposed inside the sealing cylinder. The guide plate has a threaded hole that is threadedly engaged with the screw. A guide rail is disposed on the inner wall of the upper half of the sealing cylinder, and a guide groove is disposed on the guide plate that is engaged with the guide rail.
3. The explosion relief device for preventing condensate backflow according to claim 2, characterized in that: The top of the sealing cylinder is provided with a cap, and the screw passes through the cap and is connected to the cap through a bearing seat.
4. The explosion relief device for preventing condensate backflow according to claim 2, characterized in that: The first sealing gasket is connected to the guide plate via a first connecting rod, and the first sealing gasket is connected to the second sealing gasket via a second connecting rod.
5. The explosion relief device for preventing condensate backflow according to claim 1, characterized in that: The portion of the intake pipe located inside the sealed housing has an upwardly bent section, with the opening of the bent section facing the second sealing gasket. The opening of the bent section has a concave sealing port.
6. The explosion relief device for preventing condensate backflow according to claim 2, characterized in that: The top end of the screw is provided with a coaxially arranged rotating handle.
7. The explosion relief device for preventing condensate backflow according to claim 1, characterized in that: A drain pipe is connected to the bottom of the sealed housing, and a drain valve is installed on the drain pipe.