Flame arrester device for pipeline containing naphthalene gas
By using a combination of steam distributor and partition in the flame arrester device to evenly distribute steam to prevent naphthalene crystallization, and discharge the molten liquid naphthalene through the venting interface, the problem of crystal blockage of traditional flame arresters when transporting naphthalene-containing gas is solved, and efficient cleaning and safe operation of the equipment is achieved.
Patent Information
- Application Number
- CN202421149685.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-05-24
AI Technical Summary
When traditional flame arresters transport naphthalene-containing gas, naphthalene crystals can easily block the equipment, resulting in difficulty in cleaning and affecting the pipeline transportation function. The cleaning process is harsh and labor intensity is high.
A new type of pipeline fire arrester device was designed, which consists of a shell, fire arrester, steam distributor, partition, fastener and gasket. Through the cooperation of the steam distributor and partition, steam can be evenly distributed to prevent naphthalene crystallization, and the molten liquid naphthalene is discharged through the venting interface.
When naphthalene crystallization occurs in the flame arrester, the naphthalene melts into liquid and discharges through steam online, prevents blockage, avoids the heavy work of dismantling and cleaning of the equipment, and improves the reliability and safety of the equipment.
Smart Images
Figure CN222693905U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pipeline flame arrester device for naphthalene-containing gas, belonging to the field of chemical equipment. Background Art
[0002] For pipelines that transport explosive mixed gases that may cause deflagration or detonation (possible accident conditions should be considered), pipeline flame arresters should be installed at the inlet of the receiving equipment; flame arresters should be installed in flammable gas transportation pipelines connected to burners, open vent pipes in the gas phase space of storage tanks or containers with explosive gases, and other places where flame arresters are required by regulations.
[0003] The structural forms of the flame arrester fire arrester element are corrugated plate type, parallel plate type, porous plate type, wire mesh type and filler type, and are generally made of metal.
[0004] When the conveying gas contains naphthalene and the temperature of the flame arrester device is lower than that of the conveying gas, naphthalene will condense and crystallize inside the equipment, which is easy to block the equipment. Solution: One is to remove the flame arrester for cleaning, which affects the pipeline transportation function and may cause the device to stop production in serious cases. The second is to configure spare equipment, at least one for use and one for backup. This method increases investment and the effect is not obvious. When cleaning the flame arrester, the environment is harsh and the labor intensity is high. Utility Model Content
[0005] The problem to be solved by the utility model is to solve the defect that the traditional flame arrester is inconvenient to clean when naphthalene crystallizes, and a flame arrester which is convenient for cleaning the crystallized naphthalene is realized by adopting a novel structure.
[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0007] The utility model discloses a novel pipeline flame arrester device, which consists of a shell body, a flame arrester element, a shell body, a steam distributor, a partition, fasteners and gaskets, and a venting interface component.
[0008] Shell 1 and shell 2 sandwich the fire-blocking element, and the three components are connected by fasteners and gaskets.
[0009] 2 to 30 holes are opened on the shell one, and a steam distributor is arranged in each hole to send steam into the interior of the shell one and distribute the steam evenly.
[0010] The partition is fixed on the flame arrester element and arranged upwind of the gas flow direction to divide the conveying gas entering the flame arrester into 2 to 30 parts.
[0011] The conveying gas passes through the shell 1, the steam distributor, the partition, the flame arrester element and the shell 2 in sequence.
[0012] The function of the steam distributor is to evenly distribute the steam from the outside. There are 2 to 100 small holes on the distribution pipe to evenly distribute the steam in each heating area. The distance between the steam distributor and the flame arrester is 0.1 to 2 times the inner diameter of the shell. This distance is used to mix the steam and transport the gas. The steam is low-pressure steam with a pressure of 0.1 to 0.8 MPa, or medium-pressure steam with a pressure of 0.8 to 2.0 MPa. The steam is saturated steam or superheated steam.
[0013] Partitions, taking two partitions as an example, divide the gas into three parts, namely three heating areas, and three steam distributors are set up, one steam distributor for each heating area. The steam and conveying gas in a single heating area are mixed without affecting other heating areas. The temperature range of the mixed gas is 40℃~150℃, which prevents naphthalene from crystallizing or melting.
[0014] The number of partitions provided is 1 to 30, preferably 2 to 8.
[0015] A small flow of steam is introduced into the steam distributor to increase the gas temperature to 40℃~80℃, which can prevent naphthalene crystallization and prevent the flame arrester from being blocked.
[0016] A large flow of steam is introduced into the steam distributor to increase the gas temperature to above 80°C, melt the naphthalene inside the flame arrester, and deal with the naphthalene blockage accident. The high-temperature gas may affect the performance of the flame arrester element, but at this time the steam can be used as fire extinguishing steam to ensure the safety of the flame arrester equipment.
[0017] The melted liquid naphthalene flows by gravity. On the vertically installed flame arrester, a venting interface is set at the lowest point of the pipeline connected to the shell 2. On the horizontally installed flame arrester, a venting interface is set at the bottom of the shell 2.
[0018] The utility model has the beneficial effect that when naphthalene crystallizes in the flame arrester, steam can be introduced online to melt the naphthalene into liquid and discharge the equipment, thereby preventing blockage and avoiding the heavy work of dismantling the equipment for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings that are part of the specification of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute limitations on the present invention.
[0020] Figure 1 It is a schematic diagram of a vertically installed device of the utility model;
[0021] Figure 2 It is a schematic diagram of the arrangement of the steam distributor and the partition of the utility model;
[0022] Figure 3It is a schematic diagram of a horizontally installed device of the utility model;
[0023] Among them: 1 shell one, 2 fire barrier element, 3 shell two, 4 steam distributor, 5 partition, 6 fasteners and gaskets, 7 vent interface. DETAILED DESCRIPTION
[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be noted that the specific embodiments are intended to explain the present invention rather than to limit it.
[0025] Example 1
[0026] like Figure 1 It is a new type of pipeline flame arrester installed vertically, consisting of a shell 1, a flame arrester element 2, a shell 2 3, a steam distributor 4, a partition 5, fasteners and gaskets 6. The nominal diameter of the equipment is DN200.
[0027] Shell 1 and shell 2 3 sandwich the fire-blocking element 2 in the middle, and the three components are connected by fasteners and gaskets. There are two gaskets installed at both ends of the fire-blocking element 2. The fasteners use full-thread studs with double nuts, with a total of 8 sets.
[0028] Three holes are opened on the shell one, and three groups of steam distributors 4 are installed to send steam into the interior of the shell one and distribute the steam evenly.
[0029] The steam distributor 4 evenly distributes the steam from the outside. There are 6 to 9 small holes on the distribution pipe to evenly distribute the steam in each heating area. The distance between the steam distributor 4 and the flame arrester 2 is 400 mm, which is used to mix the steam and the conveying gas. The steam is low-pressure steam with a pressure of 0.8 MPa. After the conveying gas and steam are mixed, the gas temperature is controlled at about 50°C.
[0030] The partition plates 5 are fixed on the flame arrester element 2 and arranged on the gas inlet side. The total number of the partition plates 5 is 2, and the transport gas entering the flame arrester is divided into three parts.
[0031] The conveying gas passes through the shell 1, steam distributor 4, partition 5, flame arrester 2, shell 2 3 in sequence. Shell 2 3 is connected to the subsequent pipeline for subsequent processing. The venting interface is set at the lowest point of the pipeline.
[0032] Example 2
[0033] like Figure 3 It is a new type of pipeline flame arrester installed horizontally, consisting of a shell 1, a flame arrester element 2, a shell 2 3, a steam distributor 4, a partition 5, fasteners and gaskets 6, and a venting interface 7. The nominal diameter of the equipment is DN250.
[0034] Shell 1 and shell 2 3 sandwich the fire-blocking element 2 in the middle, and the three components are connected by fasteners and gaskets. There are two gaskets installed at both ends of the fire-blocking element 2. The fasteners use full-thread studs with double nuts, with a total of 8 sets.
[0035] Three holes are opened on the shell one, and three groups of steam distributors 4 are installed to send steam into the interior of the shell one and distribute the steam evenly.
[0036] The steam distributor 4 evenly distributes the steam from the outside. There are 6 to 9 small holes on the distribution pipe to evenly distribute the steam in each heating area. The distance between the steam distributor 4 and the flame arrester 2 is 400 mm, which is used to mix the steam and the conveying gas. The steam is low-pressure steam with a pressure of 0.8 MPa. After the conveying gas and steam are mixed, the gas temperature is controlled at about 50°C.
[0037] The partition plates 5 are fixed on the flame arrester element 2 and arranged on the gas inlet side. The total number of the partition plates 5 is 2, and the transport gas entering the flame arrester is divided into three parts.
[0038] A venting interface 7 with a valve is installed at the bottom of the shell 2 3, so that the melted liquid naphthalene flows out of the equipment by gravity to prevent blockage.
[0039] The conveying gas passes through the shell 1, the steam distributor 4, the partition 5, the flame arrester 2, the shell 2 3 in sequence, and the shell 2 3 is connected to the subsequent pipeline for subsequent processing.
[0040] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of them with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A flame arrester device for a pipeline containing naphthalene gas, characterized in that: include: The utility model is composed of a shell body 1, a fire-blocking element, a shell body 2, a steam distributor, a partition, fasteners and gaskets, and a venting interface; the shell body 1 and the shell body 2 sandwich the fire-blocking element, and the three components are connected by fasteners and gaskets; 2 to 30 holes are opened on the shell body 1, and a steam distributor is arranged in each hole to send steam into the interior of the shell body 1 and distribute the steam evenly; the partition is fixed on the fire-blocking element and arranged in the upwind direction of the gas flow direction to divide the conveying gas entering the flame arrester into 2 to 30 parts; the conveying gas passes through the shell body 1, the steam distributor, the partition, the fire-blocking element, and the shell body 2 in sequence.
2. The pipeline flame arrester device according to claim 1, characterized in that: The installation form is a vertically installed pipeline flame arrester device, the second shell is connected to the subsequent pipeline, and the vent interface is set at the lowest point of the pipeline.
3. The pipeline flame arrester device according to claim 1, characterized in that: The installation form is a horizontally installed pipeline flame arrester device, and a venting interface is installed at the bottom of the shell body.