Sulfur trioxide conversion tower

Abstract

The utility model discloses a sulfur trioxide conversion tower, which comprises a tower top and a tower base, at least one tower body module is spliced and installed between the tower top and the tower base, a catalyst layer is installed in the tower body module, the catalyst layer comprises a tray frame, a plurality of catalysts are filled on the tray frame, a through gas channel is arranged on the catalyst, and the gas channel is communicated with the tray frame. A plurality of catalyst layers are designed, each catalyst layer is filled with a large number of catalysts, and zigzag gas channels are formed in the catalysts, so that multi-layer and long-stroke catalytic contact can be formed, and the catalytic contact efficiency is improved. The sulfur trioxide conversion rate is remarkably increased, and the treatment requirement of the sodium alkenyl sulfonate production tail gas is met.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical tail gas treatment equipment, and more specifically, to a sulfur trioxide conversion tower. Background Art

[0002] Sodium olefin sulfonate is an anionic surfactant with high foaming and good hydrolysis stability. It is used in phosphorus-free detergents, which can maintain good washing ability and have good compatibility with enzyme preparations. The powdered (granular) product of sodium olefin sulfonate has the advantages of not easy to stick and good fluidity, and can be used in phosphorus-free washing powder, liquid detergent, soap, personal care products, etc. The sodium olefin sulfonate product will produce tail gas during the preparation process, and the sulfur dioxide content in the tail gas produced is relatively high. At present, the method of converting sulfur trioxide is used to treat the tail gas (sulfur trioxide is a resource that can be collected and utilized) to reduce the sulfur dioxide content and reduce the amount of liquid alkali used in the subsequent treatment of the tail gas. Designing a sulfur trioxide conversion equipment with high conversion rate is an urgent need of the current enterprises, which is related to the effective control of the cost of tail gas treatment, and this case is born out of this. Utility Model Content

[0003] The purpose of the utility model is to solve the needs of the above-mentioned prior art and provide a sulfur trioxide conversion tower. The conversion tower is designed with multiple catalyst layers, each catalyst layer is filled with a large number of catalysts, and a tortuous gas channel is opened in the catalyst, so that a multi-level, long-stroke catalytic contact can be formed to significantly improve the sulfur trioxide conversion rate.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A sulfur trioxide conversion tower comprises a tower top and a tower base, wherein at least one tower body module is spliced ​​and installed between the tower top and the tower base, a catalyst layer is installed in the tower body module, the catalyst layer comprises a disc rack, a plurality of catalysts are filled on the disc rack, a through gas channel is opened on the catalyst, a main air inlet port is connected and installed on the top of the tower top, and a gas output port is connected and installed on the side wall of the tower base.

[0006] Furthermore, the disc rack is provided with a plurality of filling slots, each of which is filled with a catalyst.

[0007] Furthermore, the catalyst includes a catalyst assembly block A and a catalyst assembly block B, and the catalyst assembly block A and the catalyst assembly block B are each provided with a plurality of oblique channels. The catalyst assembly block A and the catalyst assembly block B are alternately stacked and combined. After the catalyst assembly block A and the catalyst assembly block B are combined, the oblique channels can be interconnected to form a tortuous gas channel.

[0008] Furthermore, the side walls of the catalyst assembly block A and the catalyst assembly block B are both protruded outward to form positioning protrusions.

[0009] Furthermore, the catalyst assembly block A is provided with an identification mark.

[0010] Furthermore, a plurality of plug-in pins are fixedly connected to the outer edge of the disk rack, and a plurality of support seats are fixedly connected to the inner wall of the tower module. When the disk rack is installed, the plug-in pins can be plugged into the support seats one by one.

[0011] Furthermore, the catalyst layer also includes a sealing ring. There is a gap between the tray and the inner wall of the tower module, and the sealing ring is used to fill the gap.

[0012] Furthermore, a lifting ring is fixedly connected to the upper plane of the disk rack.

[0013] Furthermore, a supplementary air inlet pipe opening is connected to the side wall of the tower body module, and the installation height of the supplementary air inlet pipe opening is higher than the catalyst layer.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model adopts a modular splicing design as a whole, which has the advantages of convenient installation and disassembly.

[0016] 2. The utility model is designed with multiple catalyst layers, and the sulfur dioxide tail gas will undergo multi-level contact during the output process to improve its conversion rate into sulfur trioxide gas.

[0017] 3. The catalyst of the utility model is provided with a tortuous gas channel, which can lengthen the catalytic contact stroke. This design can also improve the sulfur trioxide conversion rate. At the same time, the catalyst adopts a block combination mode to form a tortuous channel, so that the production difficulty of the catalyst is greatly reduced and the procurement cost is also well controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the appearance structure of the sulfur trioxide conversion tower in this embodiment;

[0019] Figure 2 is a schematic diagram of the installation structure of the catalyst layer in this embodiment;

[0020] Figure 3 Schematic diagram of the assembly of the catalyst in this embodiment;

[0021] Figure 4 It is a top view of the installation of the catalyst assembly block A on the tray in this embodiment;

[0022] Figure 5 It is a top view of the catalyst assembly block B in this embodiment.

[0023] Figure markings: tower top 1, main air inlet pipe opening 11, tower base 2, gas output pipe opening 21, tower body module 3, catalyst layer 31, disc rack 311, filling groove 3111, lifting ring 3112, catalyst 312, catalyst assembly block A 3121, identification mark 31211, catalyst assembly block B 3122, positioning protrusion 3123, inclined channel 3124, gas channel 313, plug-in foot 314, sealing ring 315, support seat 32, supplementary air inlet pipe opening 33. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figure 1-Figure 5 A sulfur trioxide conversion tower shown in the figure comprises a tower top 1 and a tower base 2, wherein at least one tower body module 3 is spliced ​​and installed between the tower top 1 and the tower base 2, a catalyst layer 31 is installed in the tower body module 3, and a catalyst layer 31 is installed in each tower body module 3, the catalyst layer 31 comprises a disc rack 311, a plurality of catalysts 312 are filled on the disc rack 311, a through gas channel 313 is opened on the catalyst 312, sulfur dioxide gas can pass through the gas channel 313, and sulfur dioxide will be converted into sulfur trioxide under the catalytic action, a main air inlet port 11 is connected and installed on the top of the tower top 1, and a gas output port 21 is connected and installed on the side wall of the tower base 2, in the utility model, the main air inlet port 11 is used to input a mixed gas of sulfur dioxide and air, The gas output pipe 21 is used to output the treated gas, which contains a large amount of sulfur trioxide and a small amount of sulfur dioxide. The sulfur trioxide is subsequently separated and recovered, and the sulfur dioxide is further treated with liquid alkali. In the utility model, a gas path is formed from top to bottom. In this path, sulfur dioxide must continuously pass through multiple catalyst layers 31, which can form a good catalytic conversion effect and meet the needs of gas conversion treatment (in order to improve the sulfur trioxide conversion rate and to achieve the best cost-effectiveness, the catalyst layer 31 is preferably arranged in three layers, that is, three tower modules 3 need to be stacked). An assembled structure is adopted between the tower module 3 and the tower top 1 and the tower base 2, which is convenient for installation and assembly and later disassembly and maintenance (catalyst replacement and other maintenance operations).

[0026] The disc rack 311 is provided with a plurality of filling slots 3111, each of which is filled with a catalyst 312. The disc rack 311 is a solid structure, and the gas can only pass through the catalyst 312. The catalyst 312 catalyzes the reaction of sulfur dioxide, so that it can be efficiently converted into sulfur trioxide.

[0027] like Figure 3 As shown, the catalyst 312 includes a catalyst assembly block A3121 and a catalyst assembly block B3122. The catalyst assembly block A3121 and the catalyst assembly block B3122 are both provided with a plurality of oblique channels 3124. The number and position of the oblique channels 3124 on the catalyst assembly block A3121 and the catalyst assembly block B3122 correspond to each other. The catalyst assembly block A3121 and the catalyst assembly block B3122 are alternately stacked and combined (in this embodiment, they are stacked and combined in an ABAB mode). After the catalyst assembly block A3121 and the catalyst assembly block B3122 are combined, the oblique channels 3124 can be interconnected to form a tortuous gas channel 313. The tortuous gas channel 313 can form a longer gas stroke, lengthening the gas and catalyst contact. The contact time of the catalytic agent can significantly improve the sulfur trioxide conversion rate (the amount of sulfur dioxide converted to sulfur trioxide). During the design process of the present invention, it was found that the catalyst 312 can be made into a whole, and a tortuous gas channel 313 can be directly opened in the catalyst 312. However, the single production cost of the catalyst 312 is very high. Therefore, the present invention replaces the overall catalyst 312 with a combination of catalyst assembly block A3121 and catalyst assembly block B3122. Only a simple inclined hole needs to be opened in a single assembly block, and the production cost is greatly reduced. After the combination, the same tortuous gas channel 313 can be formed, which does not affect the final use effect. The design structure change of the catalyst 312 greatly reduces the difficulty of catalyst production, and the equipment procurement cost is also well controlled.

[0028] like Figure 4 and Figure 5 As shown, the side walls of catalyst assembly block A3121 and catalyst assembly block B3122 are protruding outward to form positioning protrusions 3123. In order to form a tortuous gas channel 313, catalyst assembly block A3121 and catalyst assembly block B3122 need to have an installation direction so that the oblique channels 3124 can be interconnected. Catalyst assembly block A3121 and catalyst assembly block B3122 are positioned and inserted into the filling groove 3111 through the positioning protrusions 3123. In this way, when catalyst assembly block A3121 and catalyst assembly block B3122 are alternately installed, a tortuous gas channel 313 can be smoothly formed.

[0029] like Figure 4As shown, an identification mark 31211 is provided on the catalyst assembly block A3121. With the identification mark 31211, workers can accurately distinguish between the catalyst assembly block A3121 and the catalyst assembly block B3122, which is convenient for workers to quickly pick and use the catalyst assembly block A3121 and the catalyst assembly block B3122, and it is not easy to make mistakes during the stacking process of the catalyst 312.

[0030] like Figure 2 As shown, a plurality of plug-in pins 314 are fixedly connected to the outer edge of the rack 311, and a plurality of support seats 32 are fixedly connected to the inner wall of the tower module 3. When the rack 311 is installed, the plug-in pins 314 can be plugged into the support seats 32 one by one. The rack 311 adopts a plug-in structure design, which is convenient for disassembly and assembly operations.

[0031] like Figure 2 As shown, the catalyst layer 31 also includes a sealing ring 315. After the disk rack 311 is installed, there is a gap between the disk rack 311 and the inner wall of the tower module 3. If the gap is not resolved, gas will pass through the gap, affecting the conversion effect. The utility model installs a sealing ring 315 at the gap position. The sealing ring 315 is used to fill the gap so that the gas cannot pass through the gap and can only pass through the catalyst 312 position.

[0032] like Figure 2 As shown, a lifting ring 3112 is fixedly connected to the upper plane of the disc rack 311, and the lifting ring 3112 is installed in the center of the upper plane of the disc rack 311. The catalyst layer 31 is heavy as a whole and needs to be lifted during installation and removal. The lifting ring 3112 is designed for easy lifting.

[0033] like Figure 1 As shown, a supplementary air inlet pipe 33 is connected to the side wall of the tower body module 3. The installation height of the supplementary air inlet pipe 33 is higher than the catalyst layer 31. In the process of converting sulfur dioxide into sulfur trioxide, air will be continuously consumed (mainly oxygen in the air). In the absence of oxygen, the conversion rate of sulfur trioxide will also decrease. To ensure a high conversion rate, before the gas enters the catalyst layer 31, a sufficient amount of dry and clean air must be supplemented through the supplementary air inlet pipe 33.

[0034] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A sulfur trioxide conversion tower, characterized in that: The tower comprises a tower top (1) and a tower base (2), wherein at least one tower body module (3) is spliced ​​and installed between the tower top (1) and the tower base (2), wherein a catalyst layer (31) is installed in the tower body module (3), wherein the catalyst layer (31) comprises a disc rack (311), wherein the disc rack (311) is filled with a plurality of catalysts (312), wherein a through gas passage (313) is provided on the catalyst (312), wherein a main air inlet port (11) is connected and installed at the top of the tower top (1), and a gas outlet port (21) is connected and installed on the side wall of the tower base (2).

2. A sulfur trioxide conversion tower according to claim 1, characterized in that: The disc rack (311) is provided with a plurality of filling slots (3111), and each of the filling slots (3111) is filled with a catalyst (312).

3. A sulfur trioxide conversion tower according to claim 1, characterized in that: The catalyst (312) includes a catalyst assembly block A (3121) and a catalyst assembly block B (3122), and the catalyst assembly block A (3121) and the catalyst assembly block B (3122) are both provided with a plurality of oblique channels (3124). The catalyst assembly block A (3121) and the catalyst assembly block B (3122) are alternately stacked and assembled. After the catalyst assembly block A (3121) and the catalyst assembly block B (3122) are assembled, the oblique channels (3124) can be interconnected to form a tortuous gas channel (313).

4. A sulfur trioxide conversion tower according to claim 3, characterized in that: The side walls of the catalyst assembly block A (3121) and the catalyst assembly block B (3122) are both protruding outwards to form positioning protrusions (3123).

5. A sulfur trioxide conversion tower according to claim 3, characterized in that: The catalyst assembly block A (3121) is provided with an identification mark (31211).

6. A sulfur trioxide conversion tower according to claim 1, characterized in that: A plurality of plug-in pins (314) are fixedly connected to the outer edge of the disc frame (311), and a plurality of support seats (32) are fixedly connected to the inner wall of the tower body module (3); when the disc frame (311) is installed, the plug-in pins (314) can be plugged into the support seats (32) in a one-to-one correspondence.

7. A sulfur trioxide conversion tower according to claim 1, characterized in that: The catalyst layer (31) further comprises a sealing ring (315); there is a gap between the disc frame (311) and the inner wall of the tower module (3); the sealing ring (315) is used to fill the gap.

8. A sulfur trioxide conversion tower according to claim 1, characterized in that: A lifting ring (3112) is fixedly connected to the upper plane of the disk rack (311).

9. A sulfur trioxide conversion tower according to claim 1, characterized in that: A supplementary air inlet pipe opening (33) is connected to the side wall of the tower body module (3), and the installation height of the supplementary air inlet pipe opening (33) is higher than the catalyst layer (31).

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