Methanol tail gas flame arrester

Abstract

The utility model relates to the technical field of flame arresters, and discloses a methanol tail gas flame arrester which comprises a first shell and a second shell which are connected with each other, and a detachable middle filter element is arranged between the first shell and the second shell. The opposite ends of the first shell and the second shell are detachably connected with a first connecting pipe and a second connecting pipe correspondingly. Pop-up mechanisms are arranged in the first shell and the second shell, and each pop-up mechanism comprises clamping blocks mounted on the outer circumferences of the first side filter element and the second side filter element, and clamping grooves formed in the inner walls of one ends of the first shell and the second shell; according to the utility model, through the arrangement of the pop-up mechanism and the connecting piece, the first side filter element and the second side filter element can be quickly disassembled, the first side filter element and the second side filter element can be conveniently replaced, the flame retardant effect of the flame arrester can be improved, the use of the flame arrester is ensured, and the safe production of formaldehyde is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of flame arresters, in particular to a methanol tail gas flame arrester. Background Art

[0002] Flame arresters are safety devices used to prevent the spread of flames of flammable gases and flammable liquid vapors. They are usually installed in pipelines that transport flammable gases or on ventilated tanks to prevent the spread of flames (deflagration or detonation). In the process of producing formaldehyde from methanol by catalytic oxidation, they are usually installed at the exhaust gas discharge point of the preparation equipment to achieve a flame retardant effect and ensure the safe preparation of formaldehyde.

[0003] In the Chinese patent with the announcement number CN205730046U, a flame arrester using heat pipes to enhance heat dissipation is disclosed. By expanding the contact area between the small flame and the channel wall, heat transfer is enhanced, and the flame temperature is reduced below the ignition point, thereby preventing the flame from spreading. However, during the use of the above-mentioned flame arrester, the first side filter element and the second side filter element inside the first shell and the second shell are difficult to disassemble, resulting in the first side filter element and the second side filter element being unable to be replaced when they are damaged, thereby reducing the flame retardant effect of the flame arrester, affecting the use of the flame arrester, and being detrimental to the safe production of formaldehyde. Utility Model Content

[0004] The utility model provides a methanol tail gas flame arrester to solve the problem that the first side filter element and the second side filter element in the existing flame arrester are difficult to disassemble and replace when damaged, thus affecting the flame retardant effect of the flame arrester.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a methanol tail gas flame arrester, comprising a first shell and a second shell connected to each other, a detachable intermediate filter element is arranged between the first shell and the second shell, and the first shell and the second shell are detachably connected with a first connecting pipe and a second connecting pipe at opposite ends thereof, a plurality of heat pipes are installed on the outer circumference of the intermediate filter element, and a detachable first side filter element and a detachable second side filter element are arranged inside the opposite ends of the first shell and the second shell respectively; the intermediate filter element, the first side filter element and the second side filter element are all formed by stacking multiple layers of filter screens, so as to divide the flame in the methanol tail gas into a plurality of small flames, facilitate the control of the flame temperature, and prevent the spread of the flame;

[0006] The first shell and the second shell are both provided with a pop-up mechanism, and the pop-up mechanism includes a block installed on the outer circumference of the first side filter element and the second side filter element, and a slot opened on the inner wall of one end of the first shell and the second shell, and an elastic member that can pop out the block is provided in the slot.

[0007] Preferably, the elastic member comprises a first spring fixed on the inner wall of the slot, one end of the first spring is connected to a push plate, and one side of the push plate can contact the block.

[0008] Preferably, connecting parts are provided between the first connecting pipe and the first shell and between the second shell and the second connecting pipe, and the connecting parts include a second flange installed at one end of the first connecting pipe and the second connecting pipe, and a first flange fixed at one end of the first shell and the second shell, and bolts are connected between the first flange and the second flange.

[0009] Preferably, a second connecting disk is fixed to the ends of the first shell and the second shell facing each other, and a locking screw is connected between the two second connecting disks.

[0010] Preferably, a positioning mechanism is also provided between the intermediate filter element and the two second connecting plates, and the positioning mechanism includes a plurality of positioning rods installed on both sides of the intermediate filter element, and a plurality of positioning holes opened on the opposite sides of the two second connecting plates, and the plurality of positioning holes correspond one-to-one to the plurality of positioning rods.

[0011] Preferably, the positioning rod has a cavity therein, and a second spring is arranged in the cavity, both ends of the second spring are connected to mounting plates, and both mounting plates are fixed with limiting blocks on one side relative to the second spring, and both sides of the inner wall of the positioning hole are provided with limiting holes that cooperate with the limiting blocks.

[0012] Preferably, a first connection plate is installed at one end of the first connection pipe opposite to the first shell, and the first connection plate has a plurality of installation holes.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] (1) By setting the pop-up mechanism and the connecting piece, a detachable structure can be formed between the first connecting pipe and the first shell, the second shell and the second connecting pipe, and after the first connecting pipe and the first shell, the second shell and the second connecting pipe are disassembled, the first side filter element and the second side filter element can be ejected from the first shell and the second shell respectively, thereby realizing the rapid disassembly of the first side filter element and the second side filter element, facilitating the replacement of the first side filter element and the second side filter element, improving the flame retardant effect of the flame arrester, ensuring the use of the flame arrester, and facilitating the safe production of formaldehyde;

[0015] (2) By setting the positioning mechanism, the intermediate filter element and the two second connecting plates can be quickly positioned to prevent the intermediate filter element and the two second connecting plates from being offset during installation, thereby facilitating the rapid disassembly and assembly of the intermediate filter element, facilitating the replacement of the intermediate filter element, and ensuring the use of the flame arrester. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is an exploded view of the utility model;

[0019] Figure 3 It is a cross-sectional view of the first shell of the utility model;

[0020] Figure 4 It is a cross-sectional view of the second housing of the utility model;

[0021] Figure 5 It is a cross-sectional view of the positioning rod of the utility model;

[0022] Figure 6 For this utility model Figure 3 A in the enlarged view;

[0023] Figure 7 For this utility model Figure 4 The enlarged view of point B in the figure;

[0024] In the figure: 1. first connecting pipe; 2. first shell; 3. heat pipe; 4. intermediate filter element; 5. second shell; 6. second connecting pipe; 7. connecting piece; 71. first flange; 72. second flange; 73. bolt; 8. first connecting plate; 9. second connecting plate; 10. locking screw; 11. first side filter element; 12. second side filter element; 13. pop-up mechanism; 131. block; 132. slot; 133. first spring; 134. push plate; 14. positioning mechanism; 141. positioning rod; 142. positioning hole; 143. second spring; 144. mounting plate; 145. limit block; 146. limit hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides Figure 1-Figure 7 A methanol tail gas flame arrester shown in the figure comprises a first shell 2 and a second shell 5 connected to each other, a detachable intermediate filter element 4 is arranged between the first shell 2 and the second shell 5, and the ends of the first shell 2 and the second shell 5 opposite to each other are respectively detachably connected with a first connecting pipe 1 and a second connecting pipe 6, a plurality of heat pipes 3 are installed on the outer circumference of the intermediate filter element 4, and the heat pipes 3 contain a mixture medium of methanol and water to facilitate heat transfer and realize the heat dissipation of the flame arrester, and the ends of the first shell 2 and the second shell 5 opposite to each other are respectively provided with a detachable first side filter element 11 and a second side filter element 12; the ends of the first connecting pipe 1 opposite to the first shell 2 are both installed with a first connecting plate 8, and the first connecting plate 8 has a plurality of mounting holes; the ends of the first shell 2 and the second shell 5 facing each other are both fixed with a second connecting plate 9, and a locking screw 10 is connected between the two second connecting plates 9;

[0027] A pop-up mechanism 13 is provided inside the first shell 2 and the second shell 5, and the pop-up mechanism 13 includes a block 131 installed on the outer circumference of the first side filter element 11 and the second side filter element 12, and a slot 132 opened on the inner wall of one end of the first shell 2 and the second shell 5, and an elastic member that can pop out the block 131 is provided in the slot 132.

[0028] Specifically, Figure 2 , Figure 3 and Figure 6 As shown, the elastic member includes a first spring 133 fixed on the inner wall of the slot 132 , one end of the first spring 133 is connected to a push plate 134 , and one side of the push plate 134 can contact the block 131 .

[0029] When in use, the intermediate filter element 4 can be inserted between the first shell 2 and the second shell 5, and then the first shell 2 and the second shell 5 are installed and fixed by the cooperation of the locking screw 10 and the second connecting plate 9, and then the first connecting pipe 1 and the second connecting pipe 6 are respectively connected to one end of the first shell 2 and the second shell 5, so as to complete the assembly of the flame arrester, and then the flame arrester is installed on the tail gas discharge pipe of the formaldehyde preparation equipment through the first connecting plate 8. After using methanol to prepare formaldehyde, the formaldehyde preparation equipment discharges the methanol tail gas through its discharge pipe, so that the methanol tail gas is input into the first shell 2 through the first connecting pipe 1. At this time, the methanol tail gas is divided by the first side filter element 11, and after filtering, the methanol tail gas is divided again by the intermediate filter element 4, and then flows into the second shell 5, and is divided by the second side filter element 12, and then discharged from the second connecting plate 6, so that the flame in the methanol tail gas is divided into a small flame, and the heat pipe 3 is used to strengthen the heat dissipation, so that the flame temperature is reduced below the ignition point, so as to prevent the spread of the flame, so that the combustion reaction cannot continue to spread through the flame arrester;

[0030] When the middle filter element 4 needs to be replaced, the locking screw 10 can be removed, and then the first shell 2 and the second shell 5 can be pulled to take the middle filter element 4 out from between the first shell 2 and the second shell 5, and then the middle filter element 4 can be replaced; and when the first side filter element 11 and the second side filter element 12 need to be replaced, the first connecting pipe 1 and the first shell 2 and the second shell 5 and the second connecting pipe 6 can be removed. At this time, the first spring 133 pushes the push plate 134 to move along the slot 132, so that the push plate 134 pushes the block 131 out of the slot 132, thereby realizing the first side filter element 11 and the second side filter element 12 being ejected from the first shell 2 and the second shell 5 respectively, thereby facilitating the replacement of the first side filter element 11 and the second side filter element 12, and ensuring the flame retardant effect on methanol exhaust gas.

[0031] Furthermore, in order to facilitate the disassembly and assembly between the first connecting pipe 1 and the first shell 2 and between the second shell 5 and the second connecting pipe 6, as shown in FIG. Figure 1-Figure 4 As shown, a connecting piece 7 is provided between the first connecting pipe 1 and the first shell 2, and between the second shell 5 and the second connecting pipe 6, and the connecting piece 7 includes a second flange 72 installed at one end of the first connecting pipe 1 and the second connecting pipe 6, and a first flange 71 fixed at one end of the first shell 2 and the second shell 5, and a bolt 73 is connected between the first flange 71 and the second flange 72.

[0032] When the first side filter element 11 and the second side filter element 12 are disassembled, the bolts 73 can be removed first, and then the first connecting pipe 1 and the second connecting pipe 6 can be pulled respectively, so that the first connecting pipe 1 is separated from the first shell 2, and the second connecting pipe 6 is separated from the second shell 5. Subsequently, the first side filter element 11 and the second side filter element 12 are automatically ejected under the action of the elastic member, so that the first side filter element 11 and the second side filter element 12 can be quickly disassembled, and the replacement of the first side filter element 11 and the second side filter element 12 is convenient. After replacement, the first side filter element 11 and the second side filter element 12 can be respectively installed into the first shell 2 and the second shell 5, and the first connecting pipe 1 is screwed to the end of the first shell 2 by the bolts 73, and the second connecting pipe 6 is screwed to the end of the second shell 5 by the bolts 73, so as to complete the installation of the first side filter element 11 and the second side filter element 12, and the normal use of the first side filter element 11 and the second side filter element 12 is convenient.

[0033] In addition, in one embodiment, if Figure 2-Figure 5 As shown, a positioning mechanism 14 is also provided between the intermediate filter element 4 and the two second connecting plates 9, and the positioning mechanism 14 includes a plurality of positioning rods 141 installed on both sides of the intermediate filter element 4, and a plurality of positioning holes 142 opened on the opposite sides of the two second connecting plates 9, and the plurality of positioning holes 142 correspond one-to-one to the plurality of positioning rods 141.

[0034] When the intermediate filter element 4 is installed between the two second connecting plates 9, the positioning rods 141 on both sides of the intermediate filter element 4 can be inserted into the positioning holes 142 on one side of the two second connecting plates 9 to position the intermediate filter element 4 between the two second connecting plates 9 and prevent the intermediate filter element 4 from being offset from the two second connecting plates 9, thereby facilitating the rapid installation of the intermediate filter element 4 and facilitating the replacement of the intermediate filter element 4.

[0035] Furthermore, if Figure 3-Figure 5 as well as Figure 7 As shown, the positioning rod 141 has a cavity inside, and a second spring 143 is arranged in the cavity, both ends of the second spring 143 are connected to mounting plates 144, and the two mounting plates 144 are fixed with limiting blocks 145 on one side relative to the second spring 143, and both sides of the inner wall of the positioning hole 142 are provided with limiting holes 146 that cooperate with the limiting blocks 145.

[0036] When the positioning rod 141 is inserted into the positioning hole 142, the limit block 145 corresponds to the limit hole 146, and under the action of the second spring 143, the limit block 145 is pushed into the limit hole 146 to limit the position between the positioning rod 141 and the positioning hole 142, thereby further facilitating the positioning between the intermediate filter element 4 and the two second connecting plates 9; and when the intermediate filter element 4 is disassembled, the positioning rod 141 moves from the positioning hole 142, at which time the limit block 145 is squeezed and pushes the second spring 143 to contract until the limit block 145 is retracted into the cavity, and then the positioning rod 141 is moved out of the positioning hole 142, thereby facilitating the disassembly of the intermediate filter element 4.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A methanol tail gas flame arrester, comprising a first shell (2) and a second shell (5) connected to each other, characterized in that: A detachable intermediate filter element (4) is arranged between the first shell (2) and the second shell (5), and the ends of the first shell (2) and the second shell (5) opposite to each other are detachably connected with a first connecting pipe (1) and a second connecting pipe (6), a plurality of heat pipes (3) are mounted on the outer circumference of the intermediate filter element (4), and the ends of the first shell (2) and the second shell (5) opposite to each other are detachably connected with a first connecting pipe (1) and a second connecting pipe (6), a first side filter element (11) and a second side filter element (12) are arranged inside the ends of the first shell (2) and the second shell (5) opposite to each other; The first shell (2) and the second shell (5) are both provided with a pop-up mechanism (13), and the pop-up mechanism (13) comprises a clamping block (131) mounted on the outer circumference of the first side filter element (11) and the second side filter element (12), and a clamping groove (132) provided on the inner wall of one end of the first shell (2) and the second shell (5), wherein an elastic member capable of popping out the clamping block (131) is provided in the clamping groove (132).

2. A methanol tail gas flame arrester according to claim 1, characterized in that: The elastic member comprises a first spring (133) fixed on the inner wall of the card slot (132), one end of the first spring (133) is connected to a push plate (134), and one side of the push plate (134) can contact the card block (131).

3. A methanol tail gas flame arrester according to claim 1, characterized in that: A connecting piece (7) is provided between the first connecting pipe (1) and the first shell (2) and between the second shell (5) and the second connecting pipe (6), and the connecting piece (7) comprises a second flange (72) installed at one end of the first connecting pipe (1) and the second connecting pipe (6), and a first flange (71) fixed at one end of the first shell (2) and the second shell (5), and a bolt (73) is connected between the first flange (71) and the second flange (72).

4. A methanol tail gas flame arrester according to claim 1, characterized in that: A second connecting disk (9) is fixed to the ends of the first shell (2) and the second shell (5) facing each other, and a locking screw (10) is connected between the two second connecting disks (9).

5. A methanol tail gas flame arrester according to claim 4, characterized in that: A positioning mechanism (14) is also provided between the intermediate filter element (4) and the two second connection plates (9), and the positioning mechanism (14) comprises a plurality of positioning rods (141) installed on both sides of the intermediate filter element (4), and a plurality of positioning holes (142) provided on opposite sides of the two second connection plates (9), wherein the plurality of positioning holes (142) correspond one-to-one to the plurality of positioning rods (141).

6. A methanol tail gas flame arrester according to claim 5, characterized in that: The positioning rod (141) has a cavity therein, and a second spring (143) is arranged in the cavity, both ends of the second spring (143) are connected to mounting plates (144), and both mounting plates (144) are fixed with limiting blocks (145) on one side relative to the second spring (143), and both sides of the inner wall of the positioning hole (142) are provided with limiting holes (146) that match the limiting blocks (145).

7. The methanol tail gas flame arrester according to claim 1, characterized in that: A first connection plate (8) is installed at the end of the first connection pipe (1) opposite to the first shell (2), and the first connection plate (8) has a plurality of installation holes.

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