A magnesium sulfite catalyzed oxidation reactor

Abstract

The application provides a magnesium sulfite catalytic oxidation reactor, which comprises a tank body, a liquid suction structure, a liquid spraying structure and a pump body, wherein the liquid suction structure comprises a first liquid suction pipe, one end of the first liquid suction pipe extends into the bottom of the tank body, the other end of the first liquid suction pipe is connected with the pump body, and the end of the first liquid suction pipe in the tank body is provided with a filtering structure; one end of the liquid spraying structure is connected with the pump body, and the other end of the liquid spraying structure comprises a plurality of liquid spraying openings which extend into the tank body and are arranged close to the bottom of the tank body, and at least one of the liquid spraying openings is arranged towards the filtering structure. The oxidation reactor of the application increases the flow speed of slurry in the tank body, so that the slurry at the bottom of the tank body forms a turbulent effect, the catalyst is fully contacted with the slurry, and the catalytic efficiency is improved, and the problem of filtering structure blockage is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, and in particular to a magnesium sulfite catalytic oxidation reactor. Background Technology

[0002] There are two types of oxidation towers used for oxidizing magnesium sulfite in the existing technology. One type uses only a jet spray tank matched with the desulfurization tower or directly uses a spray tower for oxidation, that is, oxidation is carried out using only air, which has low oxidation efficiency and cannot obtain a high concentration of magnesium sulfate solution. The other type adds a catalyst to the oxidation tower and supplements it with an aeration device for oxidation, that is, it uses a combination of air oxidation and catalyst oxidation, which improves the oxidation efficiency to a certain extent compared to the former. However, for the existing oxidation towers with added catalysts, a catalyst layer is set in the oxidation tower, as detailed in Chinese invention patent CN201910752483.3. The setting of this catalyst layer will inevitably affect the flow rate of the liquid in the tower, and the catalyst cannot fully contact the magnesium sulfite liquid, thus affecting the catalytic effect. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a magnesium sulfite catalytic oxidation reactor to solve the problem of low oxidation efficiency in existing magnesium sulfite oxidation towers.

[0004] To achieve the above objectives, the present invention provides a magnesium sulfite catalytic oxidation reactor, comprising:

[0005] Tank body;

[0006] The liquid suction structure includes a first liquid suction tube, one end of which extends into the bottom of the tank body and the other end of which is connected to the pump body. A filter structure is provided at one end of the first liquid suction tube located inside the tank body.

[0007] The liquid spraying structure has one end connected to the pump body and the other end including a plurality of liquid spraying ports. The plurality of liquid spraying ports extend into the tank body and are disposed near the bottom of the tank body, and at least one of the liquid spraying ports is disposed facing the filter structure.

[0008] Furthermore, the liquid suction structure also includes a second liquid suction tube, which is located above the first liquid suction tube. One end of the second liquid suction tube extends into the middle of the tank body, and the other end is connected to the pump body. The filter structure is provided at one end of the second liquid suction tube located inside the tank body.

[0009] Furthermore, the liquid spraying structure includes a liquid delivery pipe assembly and multiple liquid spraying pipe assemblies connected to the liquid delivery pipe assembly;

[0010] The liquid delivery pipe assembly includes a liquid delivery pipe and a distribution pipe. One end of the liquid delivery pipe is connected to the pump body, and the other end is connected to the distribution pipe.

[0011] The spray pipe assembly includes a self-priming air injector, a return pipe, and a spray pipe connected in sequence. The end of the self-priming air injector away from the return pipe is connected to the distribution pipe, and the spray nozzle of the spray pipe extends into the tank body.

[0012] Furthermore, the injection pipe includes a straight pipe section and a bent section connected together. The straight pipe section is fixed to the side wall of the tank body. The end of the straight pipe section away from the bent section is connected to the return pipe. The bent section is located inside the tank body, and its injection port is located near the bottom of the tank body.

[0013] Furthermore, the filtration structure is a filter screen.

[0014] Furthermore, multiple injection pipes are evenly arranged on the tank body.

[0015] Furthermore, the air inlet of the self-priming air injector is connected to a normally open air inlet pipe.

[0016] Furthermore, the distribution pipe is an annular pipe, and the distribution pipe is located above the tank body.

[0017] Furthermore, the top of the tank is provided with a bracket for supporting the distribution pipe.

[0018] Furthermore, it also includes a discharge port located at the bottom of the tank, where the filter structure is provided.

[0019] As can be seen from the above, the oxidation reactor provided by this invention uses a pump body to draw magnesium sulfite slurry from the tank via a suction structure, and then sprays the drawn-out slurry back into the tank via a spray structure, thus achieving slurry circulation. This process increases the flow rate of the slurry within the tank. The spray nozzles of the spray structure are positioned near the bottom of the tank, meaning the slurry is drawn from the bottom and sprayed back, creating a turbulent effect at the bottom of the tank. This turbulence continuously washes over the filter structure, making it less likely for the catalyst to adhere to its surface. At least one spray nozzle is positioned towards the filter structure, allowing it to directly wash away any catalyst adhering to it. The oxidation reactor of this application increases the flow rate of the slurry within the tank, creating a turbulent effect in the slurry at the bottom of the tank. This ensures sufficient contact between the catalyst and the slurry, thereby improving catalytic efficiency and effectively solving the problem of filter clogging. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the interior of the oxidation reactor in the main view direction according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the injection pipe layout inside the oxidation reactor according to an embodiment of the present invention;

[0023] Figure 3 This is a top view of the oxidation reactor according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram showing the connection relationship between the first suction tube, the second suction tube, and the delivery tube in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the spray pipe assembly according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of a self-priming air injector according to an embodiment of the present invention.

[0027] In the diagram: 1. Tank body; 11. Inlet; 12. Outlet; 13. Overflow port; 14. Manhole; 2. Liquid suction structure; 21. First liquid suction pipe; 22. Second liquid suction pipe; 3. Liquid delivery pipe assembly; 31. Liquid delivery pipe; 32. Distribution pipe; 4. Liquid spraying pipe assembly; 41. Self-priming air injector; 41a. Liquid inlet pipe; 41b. Throat pipe; 41c. Diffuser pipe; 41d. Air inlet chamber; 41e. Air inlet pipe; 42. Liquid return pipe; 43. Spray pipe; 431. Straight pipe section; 432. Bend section; 433. Spray nozzle; 5. Pump body; 6. Filter structure. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] As described in the background section, existing oxidation towers with added catalysts have a catalyst layer, as detailed in Chinese invention patent CN201910752483.3. The presence of this catalyst layer inevitably affects the flow rate of the liquid inside the tower, and the catalyst cannot fully contact the magnesium sulfite slurry, thus affecting the catalytic effect.

[0031] To improve catalytic efficiency, this case makes improvements in the following three aspects: (1) removing the restriction of the catalyst layer on the catalyst, that is, the catalyst exists freely in the oxidation tower; (2) increasing the flow rate of the slurry in the oxidation tower and creating the effect of slurry turbulence in the oxidation tower, so that the catalyst can contact more slurry for catalysis per unit time; (3) increasing the dissolved oxygen content in the slurry.

[0032] To increase the flow rate of the slurry within the oxidation tower, one could refer to the existing circulating spray tower, which involves extracting the slurry from the oxidation tower and then spraying it back into the tower. However, during the slurry extraction process, the catalyst is extracted along with the slurry. Since a pump is required, the catalyst is broken up as it flows through the pump, affecting its catalytic effect. Furthermore, the catalyst is expensive, thus increasing overall costs. Therefore, improvements (1) and (2) presented above are contradictory in practice.

[0033] To resolve the aforementioned contradictions, a filter structure can be installed at the liquid suction port. However, during the liquid suction process, the catalyst will accumulate on the surface of the filter structure, thus clogging the suction port and affecting the circulation of the slurry. Furthermore, directly adopting the design of a circulating spray tower can only increase the flow rate of the slurry within the oxidation tower to a certain extent, but it cannot create a turbulent effect within the oxidation tower.

[0034] To address the aforementioned issues, the following description is provided in conjunction with specific embodiments and accompanying drawings.

[0035] In some embodiments, the present invention provides a magnesium sulfite catalytic oxidation reactor, such as... Figure 1 , Figure 2 As shown, it includes:

[0036] Tank 1;

[0037] The liquid suction structure 2 includes a first liquid suction tube 21, one end of which extends into the bottom of the tank 1 and the other end is connected to the pump body 5. A filter structure 6 is provided at the end of the first liquid suction tube 21 located inside the tank 1.

[0038] The liquid spraying structure has one end connected to the pump body 5 and the other end includes a plurality of liquid spraying ports 433. The plurality of liquid spraying ports 433 extend into the tank body 1 and are disposed near the bottom of the tank body 1. At least one of the liquid spraying ports 433 is disposed facing the filter structure 6.

[0039] The pump body 5 can be a jet circulation pump.

[0040] In this embodiment, the filter structure 6 is a filter screen, specifically a cylindrical filter screen. This filter screen has a large filtration area and is less prone to complete clogging.

[0041] For example, the lower part of the tank body 1 is provided with 6 spray nozzles 433 circumferentially, and the filter structure 6 located at the end of the first suction pipe 21 is located in the middle of the bottom of the tank body 1 and is vertically arranged. Figure 1 , Figure 2 As shown, among the six spray nozzles 433, three spray nozzles 433 spray vertically downwards and three spray nozzles 433 spray obliquely downwards. The oblique downward spraying process can wash the filter structure 6, that is, the three spray nozzles 433 are set towards the filter structure 6; the three vertically downward spray nozzles 433 and the three spray nozzles 433 set towards the filter structure 6 are arranged at intervals.

[0042] In this embodiment, the pump body 5 draws out the magnesium sulfite slurry from the tank 1 via the suction structure 2, and then sprays the drawn-out slurry back into the tank 1 via the spray structure, thus realizing the circulation of the slurry. This process can increase the flow rate of the slurry in the tank 1. Furthermore, the suction structure 2 draws the slurry out of the tank 1 via the first suction pipe 21. To avoid catalyst loss, a filter structure 6 is set at the end of the first suction pipe 21 that extends into the tank 1 (i.e., the water inlet end) to confine the catalyst within the tank 1. However, due to gravity, most of the catalyst is located in the lower middle and bottom parts of the tank 1, while the water inlet end of the first suction pipe 21 is located at the bottom of the tank 1. During the process of the pump body 5 drawing out the slurry, the filter structure 6 will inevitably become clogged.

[0043] To address this problem, this embodiment makes improvements in the following two aspects:

[0044] Firstly, the spray nozzle 433 of the spray structure is set in the tank 1 near the bottom. That is, the slurry is drawn out from the bottom of the tank 1 and sprayed back to the bottom of the tank 1. Therefore, the slurry at the bottom of the tank 1 can form a turbulent effect. This turbulent effect can continuously wash the filter structure 6, making it difficult for the catalyst to adhere to the surface of the filter structure 6.

[0045] Secondly, at least one spray nozzle 433 is positioned toward the filter structure 6, that is, the at least one spray nozzle 433 can directly flush the filter structure 6, and can wash off the catalyst attached to the filter structure 6.

[0046] The above two improvements can effectively solve the problem of clogging of the filter structure 6, while increasing the flow rate of the slurry in the tank 1 and making the slurry at the bottom of the tank 1 turbulent. They also allow the catalyst to come into effective contact with more slurry, thereby improving the catalytic efficiency.

[0047] In some embodiments, such as Figure 1 As shown, the liquid suction structure 2 also includes a second liquid suction tube 22, which is located above the first liquid suction tube 21. One end of the second liquid suction tube 22 extends into the middle of the tank body 1, and the other end is connected to the pump body 5. The end of the second liquid suction tube 22 located in the tank body 1 is provided with the filter structure 6.

[0048] In this embodiment, the filter structure 6 is a filter screen, specifically a cylindrical filter screen. This filter screen has a large filtration area and is less prone to complete clogging.

[0049] For example, such as Figure 1 As shown, the filter structure 6 located at the end of the second suction pipe 22 is located in the middle of the tank body 1 and is horizontally arranged.

[0050] In this embodiment, the liquid absorption structure 2 is also provided with a second liquid absorption pipe 22. The second liquid absorption pipe 22 and the first liquid absorption pipe 21 together perform the liquid absorption process, which increases the amount of liquid absorbed, that is, further increases the flow rate of the slurry in the tank 1 and improves the catalytic efficiency. In addition, the suction port of the second suction pipe 22 extends into the middle of the tank body 1 and is positioned opposite to the suction port of the first suction pipe 21, which is located at the bottom of the tank body 1. During the suction process, two negative pressure zones are formed at the bottom and middle of the tank body 1. The slurry in the upper part of the tank body 1 flows to the negative pressure zone in the middle, and the slurry sprayed back to the bottom of the tank body 1 flows to the negative pressure zone at the bottom of the tank body 1. The slurry in both negative pressure zones will generate large turbulent kinetic energy, that is, a churning effect. Moreover, the two zones are close to each other, and the churning effect of the two negative pressure zones is superimposed, so that the slurry in the middle, lower middle and bottom of the tank body 1 will have a large churning effect. Due to gravity, the catalyst itself will gather in the lower middle part of the tank body 1 and fully contact the slurry with the churning effect, thereby improving the catalytic efficiency.

[0051] Additionally, a filter structure 6 is provided at one end of the second suction pipe 22 that extends into the tank 1 (i.e., the suction port end). Since the filter structure 6 is located in the middle of the tank 1, there is less catalyst in the middle compared to the bottom, and the turbulent effect of the slurry formed in the negative pressure zone in the middle will continuously wash the filter structure 6, making it difficult for the catalyst to adhere to the surface of the filter structure 6, thus avoiding the problem of catalyst clogging the filter structure 6.

[0052] Furthermore, a valve is provided on the first suction pipe 21. The reason for setting up two suction pipes in this embodiment is that when the reactor is first started up or restarted after being stopped, the catalyst and solid slurry in the tank will settle to the bottom of the tank 1. The pump 5 first draws liquid through the second suction pipe 22. After the catalyst and slurry settled at the bottom are stirred up, the valve of the first suction pipe 21 is opened, and both suction pipes work together. This avoids the problem of clogging the filter structure 6 of the first suction pipe 21 when only the first suction pipe 21 is set up during startup.

[0053] In some embodiments, such as Figure 3 , Figure 4 , Figure 5 As shown, the liquid spraying structure includes a liquid delivery pipe assembly 3 and multiple liquid spraying pipe assemblies 4 connected to the liquid delivery pipe assembly 3.

[0054] The liquid delivery pipe assembly 3 includes a liquid delivery pipe 31 and a distribution pipe 32. One end of the liquid delivery pipe 31 is connected to the pump body 5, and the other end is connected to the distribution pipe 32.

[0055] The spray pipe assembly 4 includes a self-priming air injector 41, a return pipe 42, and a spray pipe 43 connected in sequence. The end of the self-priming air injector 41 away from the return pipe 42 is connected to the distribution pipe 32, and the spray nozzle 433 of the spray pipe 43 extends into the tank 1.

[0056] The spray pipe 43 includes a straight pipe section 431 and a bent section 432 connected to each other. The straight pipe section 431 is fixed on the side wall of the tank body 1. The end of the straight pipe section 431 away from the bent section 432 is connected to the return pipe 42. The bent section 432 is located inside the tank body 1, and its spray nozzle 433 is located near the bottom of the tank body 1.

[0057] The plurality of spray pipes 43 are evenly arranged on the tank body 1. The number of spray pipes 43 (i.e., the number of spray pipe groups 4) can be determined separately according to the size of the tank body 1. For example, for a volume of 50 to 100 m³, 3 The number of spray pipes 43 in tank 1 can be set to 3, for a volume > 100m³. 3 The number of tank 1 and spray pipe 43 can be set to 6.

[0058] The self-priming air injector 41 can be an LJX180-II type self-priming air injector 41, such as... Figure 6 As shown, the system includes an inlet pipe 41a, a throat pipe 41b, and a diffuser pipe 41c connected in sequence. The throat pipe 41b is connected to the air inlet chamber 41d. An air inlet pipe 41e is connected to the air inlet of the air inlet chamber 41d. The diffuser pipe 41c sprays out the slurry to form a high-speed jet, creating a negative pressure at the throat pipe 41b. Air is then drawn in through the air inlet pipe 41e and fully mixed with the slurry passing through the throat pipe 41b to form a gas-liquid mixture. In contrast, existing methods of injecting air into the slurry using an aeration pump can only form a slurry with bubbles. The gas-liquid mixture formed in this embodiment has a higher dissolved oxygen content than a slurry with bubbles. After entering the tank 1 through the return pipe 42 and the injection pipe 43, the gas-liquid mixture fully contacts the catalyst, which is beneficial to improving the oxidation catalytic efficiency.

[0059] Furthermore, such as Figure 3 As shown, the distribution pipe 32 is an annular pipe, and the distribution pipe 32 is located above the tank body 1, as shown. Figure 5 As shown, the self-priming air injector 41 is located above one side of the tank body 1. The above-mentioned pipeline arrangement facilitates pipeline layout.

[0060] Furthermore, to improve the safety and stability of the distribution pipe 32, a bracket (not shown in the figure) is provided on the top of the tank body 1 to support the distribution pipe 32.

[0061] In some embodiments, such as Figure 1 , Figure 2As shown, the tank body has a feed inlet 11 at the top, an overflow outlet 13 at the upper part, and a discharge outlet 12 and a maintenance manhole 14 at the lower part. The discharge outlet 12 is equipped with the filter structure 6. In this embodiment, the oxidation reactor uses a slurry pump for discharge, and the filter structure 6 at the discharge outlet 12 is a screen to prevent the catalyst from being discharged.

[0062] The use of the oxidation reactor in this application can also be described by the following embodiment: The pump body 5 is started, and the pump body 5 draws liquid from the tank 1 through the first suction pipe 21 and the second suction pipe 22. The drawn slurry enters the distribution pipe 32 located at the top of the tank 1 through the liquid delivery pipe 31. The distribution pipe 32 evenly distributes the slurry to the self-aspirating air injectors 41 of each spray pipe group 4. The slurry is mixed with the air entering the throat 41b of the self-aspirating air injector 41 to form a gas-liquid mixture, and is sprayed to the return pipe 42, and then sprayed back into the tank 1 through the spray pipe 43. The liquid in the middle and lower part of the tank 1 is turbulent and in full contact with the catalyst. Under the action of the catalyst, the reaction between the slurry in the gas-liquid mixture and the air in the gas-liquid mixture is accelerated. The air oxidizes the magnesium sulfite in the slurry into magnesium sulfate.

[0063] The catalytic efficiency comparison experiment between the oxidation reactor of this application and Example 2 in CN201910752483.3 is as follows:

[0064] 80m³ of slurry 3 The slurry concentration was 45%, the catalyst was cobalt nitrate / ZSM-5 molecular sieve catalyst, the catalyst dosage was 3.2t, the catalyst mass to sodium magnesium sulfite slurry volume ratio was 40g:1L, the reaction temperature was 45℃, and the pumping capacity of the oxidation reactor was 150m³. 3 The reaction time was 36 hours, and after the reaction was complete, precipitation was carried out to obtain approximately 70 mg / h. 3 The supernatant of the magnesium sulfate solution was concentrated to 60% of its original volume and then cooled at 20°C for crystallization. The precipitated magnesium sulfate heptahydrate was then separated by centrifugation to obtain solid magnesium sulfate heptahydrate and a remaining magnesium sulfate mother liquor. The mother liquor could be returned to the evaporator for further concentration. Testing revealed a yield of 33.5 tons of solid magnesium sulfate heptahydrate with a purity greater than 99%, resulting in a solid yield of 931 kg / h. In contrast, Example 2 of CN201910752483.3 showed a yield of only 100 kg / h for magnesium sulfate heptahydrate.

[0065] That is, using the oxidation reactor of this application, compared with the reaction tank in CN201910752483.3 (magnesium sulfate solid yield 100m³), 3 Under the same conditions of slurry volume mass concentration and catalyst dosage, the oxidation catalytic efficiency can be increased by more than 9 times.

[0066] Additionally, it should be noted that the pump body is 140m. 3 / h~160m 3 A pumping rate of / h ensures continuous pumping without clogging the filter screen, even at rates below 140m³. 3 A flow rate of 1 / h will lead to a decrease in flow rate, affecting the catalytic efficiency of the catalyst. A pumping rate exceeding 160m³ / h will also negatively impact the flow rate. 3 A flow rate of 150 m³ / h would clog the filter screen, causing downtime for maintenance and affecting the normal operation of the oxidation reactor, which in turn affects the catalytic efficiency of the catalyst. Therefore, a flow rate of 150 m³ / h is preferable. 3 The pumping rate of / h allows the oxidation reactor to achieve a balance between continuous operation and catalytic efficiency.

[0067] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure (including the claims) is limited to these examples; within the framework of this invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0068] The embodiments of this invention are intended to cover all such substitutions, modifications, and variations falling within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A magnesium sulfite catalyzed oxidation reactor characterized by, The application relates to a liquid suction and spraying device, which comprises a tank body, a liquid suction structure, a liquid spraying structure and a pump body. The liquid suction structure comprises a first liquid suction pipe, one end of which is arranged in the bottom of the tank body, and the other end of which is connected with the pump body, and a filter structure is arranged on the end of the first liquid suction pipe in the tank body. The liquid spraying structure comprises a liquid delivery pipe group and six liquid spraying pipe groups which are connected with the liquid delivery pipe group. The liquid delivery pipe group comprises a liquid delivery pipe and a distribution pipe, one end of the liquid delivery pipe is connected with the pump body, and the other end of the liquid delivery pipe is connected with the distribution pipe. The liquid spraying pipe group comprises a self-suction air sprayer, a liquid return pipe and a spraying pipe which are connected in sequence, one end of the self-suction air sprayer which is far away from the liquid return pipe is connected with the distribution pipe, and the liquid spraying port of the spraying pipe is arranged in the tank body.

2. A magnesium sulfite catalyzed oxidation reactor according to claim 1, characterized in that, The spraying pipe comprises a straight pipe section and a bending section which are connected in sequence, the straight pipe section is fixedly arranged on the side wall of the tank body, one end of the straight pipe section which is far away from the bending section is connected with the liquid return pipe, and the bending section is arranged in the tank body, and the liquid spraying port of the bending section is arranged close to the bottom of the tank body. The filter structure is a filter cover. The air inlet of the self-suction air sprayer is connected with a normally-open air inlet pipe.

3. A magnesium sulfite catalyzed oxidation reactor according to claim 2, characterized in that, The distribution pipe is a ring-shaped pipe, and the distribution pipe is arranged above the tank body.

4. The magnesium sulfite catalytic oxidation reactor of claim 1, wherein, A support is arranged on the top of the tank body to support the distribution pipe.

5. A magnesium sulfite catalyzed oxidation reactor according to claim 2, characterized in that, A discharge port is arranged on the bottom of the tank body, and the filter structure is arranged on the discharge port.

6. A magnesium sulfite catalyzed oxidation reactor according to claim 2, characterized in that, ​ 7. A magnesium sulfite catalyzed oxidation reactor according to claim 2, characterized in that, ​ 8. A magnesium sulfite catalyzed oxidation reactor according to claim 1, characterized in that, ​

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