Tower type catalytic oxidation reactor

Abstract

The utility model discloses a tower-type catalytic oxidation reactor which comprises a tower body, a cavity unit is arranged in the tower body, and the tower-type catalytic oxidation reactor further comprises a heat exchange pipe arranged in the cavity unit through a pipeline support. The heat exchange pipe is provided with a water inlet and a water outlet, and the water inlet and the water outlet penetrate through the side wall of the tower body and are located outside the tower body. And the internal temperature of the tower type catalytic oxidation reactor can be prevented from rapidly rising. The device has the advantages of simple structure, easy implementation, safety, reliability and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and specifically relates to a tower type catalytic oxidation reactor. Background Art

[0002] Organic compounds containing organic disulfide bonds are usually called disulfides, and their general structural formula is RSSR. Functionalized disulfides are important intermediates for fine chemicals and are widely used in various fields such as protein construction, natural products, organic products, medicine, and nanomaterials.

[0003] At present, the representative process for producing disulfides such as dimethyl disulfide and di-tert-butyl disulfide is the liquid phase catalytic oxidation process of sodium methyl mercaptan and sodium tert-butyl mercaptan. If continuous production is to be carried out, a tower catalytic oxidation reactor is required. The tower catalytic oxidation reactor includes a tower body, and an upper plate and a lower plate arranged in an upper and lower interval are installed in the inner cavity of the tower body; the upper plate and the lower plate divide the inner cavity of the tower body into a discharge chamber, a catalytic chamber and a packing chamber arranged in sequence from top to bottom; the catalytic chamber is connected to the packing chamber through the first through hole on the lower plate, and the discharge chamber is connected to the catalytic chamber through the second through hole on the upper plate; a partition plate is installed in the catalytic chamber, and several partition plates divide the catalytic chamber into a plurality of chamber units arranged in sequence from top to bottom; two adjacent chamber units are connected through the third through hole on the partition plate; a feed port located below the lower plate is provided on the side wall of the tower body, and the feed port is connected to the packing chamber; a product outlet connected to the discharge chamber is provided at the top of the tower body. The mixture is introduced into the tower body through the feed inlet for reaction, and the generated product is discharged from the product outlet.

[0004] Taking the production of dimethyl disulfide as an example, the preparation process of the tower catalytic oxidation reactor includes: pre-mixing the sodium methyl mercaptan solution and oxygen in a pipeline, and then passing the mixture of the sodium methyl mercaptan solution and oxygen into a static mixer for full mixing, so that the oxygen is evenly dispersed in the sodium methyl mercaptan solution. The fully mixed mixture is passed into the packing chamber through the feed port, and further mixed with the stainless steel random packing or granular activated carbon packing in the packing chamber. As the mixture is continuously passed, the mixture rises through the first through hole on the lower plate and enters the chamber unit located below, and contacts the catalyst in the chamber unit. The mixture continues to rise through the third through hole on the partition plate and enters the chamber unit located above, and contacts the catalyst in the chamber unit. Under the action of the catalyst, sodium methyl mercaptan reacts with oxygen to generate dimethyl disulfide and sodium hydroxide. As the mixture continues to rise, the amount of sodium methyl mercaptan and oxygen in the mixture gradually decreases, and the generated oxidation product gradually increases. The oxidation product enters the discharge chamber through the second through hole on the upper plate, and finally flows out from the product outlet. The main components of the oxidation product include sodium hydroxide, dimethyl disulfide, and water, and the minor components include unoxidized sodium methyl mercaptan and unconsumed oxygen.

[0005] Although the tower catalytic oxidation reactor is suitable for continuous production, the reaction of sodium methyl mercaptan and oxygen to produce dimethyl disulfide and sodium hydroxide is an exothermic reaction. The heat released by the reaction heats up the mixture in the tower body cavity, and the heat is mainly dissipated through the tower wall. If the heat dissipation is not timely, the temperature in the tower body will rise rapidly. If the temperature is too high and exceeds the set value, it will easily cause the tower to explode, which poses a great safety hazard. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a tower catalytic oxidation reactor which can prevent the internal temperature of the tower catalytic oxidation reactor from rising rapidly.

[0007] The utility model adopts the following technical scheme to solve the technical problems: a tower catalytic oxidation reactor comprises a tower body, an upper plate and a lower plate arranged in an upper and lower interval are installed in the inner cavity of the tower body; the upper plate and the lower plate divide the inner cavity of the tower body into a discharge chamber, a catalytic chamber and a packing chamber arranged in sequence from top to bottom; the catalytic chamber is connected with the packing chamber through a first through hole on the lower plate, and the discharge chamber is connected with the catalytic chamber through a second through hole on the upper plate; a partition plate is installed in the catalytic chamber, and a plurality of the partition plates divide the catalytic chamber into a plurality of chamber units arranged in sequence from top to bottom; two adjacent chamber units are connected through a third through hole on the partition plate; a feed inlet located below the lower plate is arranged on the side wall of the tower body, and the feed inlet is connected with the packing chamber; a product outlet connected with the discharge chamber is arranged on the top of the tower body;

[0008] It also includes a heat exchange tube installed in the chamber unit through a pipe bracket; the heat exchange tube has a water inlet and a water outlet, the water inlet and the water outlet pass through the side wall of the tower body and are located outside the tower body.

[0009] Furthermore, the water inlet is located below the water outlet.

[0010] Furthermore, the heat exchange tube is a heat exchange coil, and the heat exchange coil is coaxially arranged with the tower body.

[0011] Furthermore, the heat exchange coils are provided in two groups, and one group of the heat exchange coils is installed outside the other group of the heat exchange coils.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a tower catalytic oxidation reactor, which can prevent the internal temperature of the tower catalytic oxidation reactor from rising rapidly, and has the advantages of simple structure, easy implementation, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a structural schematic diagram of the utility model;

[0014] Figure numerals: 1-tower body; 101-shutdown liquid withdrawal port; 102-product outlet; 103-discharging chamber; 104-chamber unit; 105-filling chamber; 2-upper plate; 3-lower plate; 4-partition plate; 5-heat exchange tube; 501-water inlet; 502-water outlet; 6-feed port; 7-first manhole; 8-second manhole; 9-third manhole; 10-remote thermometer; 11-safety valve; 12-remote pressure gauge. DETAILED DESCRIPTION

[0015] The following is combined with Figure 1 The utility model is further illustrated with embodiments.

[0016] A tower catalytic oxidation reactor comprises a tower body 1, wherein an upper plate 2 and a lower plate 3 are installed in the inner cavity of the tower body 1 and are arranged in an interval from top to bottom; the upper plate 2 and the lower plate 3 divide the inner cavity of the tower body 1 into a discharge chamber 103, a catalytic chamber and a packing chamber 105 which are arranged in sequence from top to bottom; the catalytic chamber is connected to the packing chamber 105 through a first through hole on the lower plate 3, and the discharge chamber 103 is connected to the catalytic chamber through a second through hole on the upper plate 2; A partition plate 4 is installed in the catalytic chamber, and several of the partition plates 4 divide the catalytic chamber into a plurality of chamber units 104 arranged in sequence from top to bottom; two adjacent chamber units 104 are connected via the third through hole on the partition plate 4; a feed port 6 located below the lower plate 3 is provided on the side wall of the tower body 1, and the feed port 6 is connected to the filling chamber 105; a product outlet 102 connected to the discharge chamber 103 is provided on the top of the tower body 1.

[0017] It also includes a heat exchange tube 5 installed in the chamber unit 104 through a pipe bracket; the heat exchange tube 5 has a water inlet 501 and a water outlet 502, and the water inlet 501 and the water outlet 502 pass through the side wall of the tower body 1 and are located outside the tower body 1.

[0018] A safety valve 11 is installed on the top of the tower body 1. A shutdown liquid withdrawal port 101 connected to the packing chamber 105 is provided at the bottom of the tower body 1. A valve is installed at the shutdown liquid withdrawal port 101. During the preparation process of dimethyl disulfide, the valve is in a closed state. A remote pressure gauge 12 and a remote thermometer 10 are installed on the tower body 1. The remote pressure gauge 12 detects the pressure in the inner cavity of the tower body 1 in real time, and the remote thermometer 10 detects the temperature in the inner cavity of the tower body 1 in real time. This is the prior art. The upper plate 2, the lower plate 3 and the partition plate 4 are all arranged horizontally and are welded to the inner side wall of the tower body 1. This is the prior art. The partition plate 4 is located between the upper plate 2 and the lower plate 3. A first manhole 7, a second manhole 8 and a third manhole 9 are provided on the side wall of the tower body 1. The first manhole 7 is arranged corresponding to the packing chamber 105, the second manhole 8 is arranged corresponding to the chamber unit 104, and the third manhole 9 is arranged corresponding to the discharge chamber 103. The staff fills the filler into the filler chamber 105 through the first manhole 7 , and fills the activated carbon mixed with the catalyst into the chamber unit 104 through the second manhole 8 .

[0019] The mixture of sodium methyl mercaptan solution and oxygen is introduced into the packing chamber 105 through the feed port 6, and the mixture is further mixed with the packing. As the mixture is continuously introduced, the mixture rises and passes through the first through hole on the lower plate 3 to enter the chamber unit 104 located below, and contacts the catalyst in the chamber unit 104. The mixture continues to rise through the third through hole on the partition plate 4 to enter the chamber unit 104 located above, and contacts the catalyst in the chamber unit 104. Under the action of the catalyst, sodium methyl mercaptan reacts with oxygen to generate oxidation products. The oxidation products continue to rise, pass through the second through hole on the upper plate 2 to enter the discharge chamber 103, and then are discharged from the product outlet 102. Since the partition plate 4 divides the catalytic chamber into a plurality of chamber units 104 arranged sequentially from top to bottom, the third through hole on the partition plate 4 can ensure the passage of the mixture and the oxidation products, and the mixture can undergo continuous multiple reactions during the rising process, and the reaction is sufficient and thorough. The pipe support provides installation support for the heat exchange tube 5 in the chamber unit 104, and the pipe support is a structure in the prior art. The water inlet 501 and the water outlet 502 of the heat exchange tube 5 are connected to external circulating water, so that the internal temperature of the chamber unit 104 is reduced, and the explosion of the tower body 1 due to excessive heat accumulation is avoided, which is safe and reliable.

[0020] Preferably, the water inlet 501 is located below the water outlet 502 .

[0021] Preferably, the heat exchange tube 5 is a heat exchange coil, and the heat exchange coil is coaxially arranged with the tower body 1 .

[0022] In order to further improve the heat exchange effect, preferably, the heat exchange coils are provided in two groups, and one group of the heat exchange coils is installed outside the other group of the heat exchange coils, forming a double-layer structure of an inner circle heat exchange coil and an outer circle heat exchange coil, further improving the heat exchange effect.

[0023] The above is a specific implementation of the utility model. From the implementation process, it can be seen that the utility model provides a tower catalytic oxidation reactor, which can prevent the internal temperature of the tower catalytic oxidation reactor from rising rapidly. It has the advantages of simple structure, easy implementation, safety and reliability.

Claims

1. A tower catalytic oxidation reactor, comprising a tower body (1), wherein an upper plate (2) and a lower plate (3) are installed in an inner cavity of the tower body (1) and are arranged in an interval from top to bottom; the upper plate (2) and the lower plate (3) divide the inner cavity of the tower body (1) into a discharge chamber (103), a catalytic chamber and a packing chamber (105) which are arranged in sequence from top to bottom; the catalytic chamber and the packing chamber (105) are connected through a first through hole on the lower plate (3), and the discharge chamber (103) and the catalytic chamber are connected through a second through hole on the upper plate (2); the catalytic chamber A partition plate (4) is installed in the chamber, and a plurality of the partition plates (4) divide the catalytic chamber into a plurality of chamber units (104) arranged in sequence from top to bottom; two adjacent chamber units (104) are connected via a third through hole on the partition plate (4); a feed port (6) located below the lower plate (3) is provided on the side wall of the tower body (1), and the feed port (6) is connected to the packing chamber (105); a product outlet (102) connected to the discharge chamber (103) is provided on the top of the tower body (1); the characteristics are: It also comprises a heat exchange tube (5) installed in the chamber unit (104) via a pipe bracket; the heat exchange tube (5) has a water inlet (501) and a water outlet (502); the water inlet (501) and the water outlet (502) pass through the side wall of the tower body (1) and are located outside the tower body (1).

2. The tower catalytic oxidation reactor according to claim 1, characterized in that: The water inlet (501) is located below the water outlet (502).

3. The tower catalytic oxidation reactor according to claim 1, characterized in that: The heat exchange tube (5) is a heat exchange coil, and the heat exchange coil is coaxially arranged with the tower body (1).

4. The tower catalytic oxidation reactor according to claim 3, characterized in that: The heat exchange coils are provided in two groups, wherein the heat exchange coils in one group are sleeved and installed outside the heat exchange coils in the other group.

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