Oxidized tail gas treatment device

Abstract

The utility model relates to the technical field of industrial tail gas treatment, in particular to an oxidized tail gas treatment device. Comprising a hydrogen peroxide oxidation tail gas pipeline, a cold box, a first-stage separator, a first tail gas heat exchanger, a turbine expansion generator set, a second-stage separator, a second tail gas heat exchanger, an oxidation tower middle cooler, an activated carbon fiber adsorption tower and a working solution / hydrogen peroxide separator, and the hydrogen peroxide oxidation tail gas pipeline is communicated with the first-stage separator through a cooling channel of the cold box. According to the utility model, the circulating water outlet of the cooler in the oxidation tower is used for heating, so that the energy is saved, the generating capacity of the turbine expansion generator set is increased by 60%, the temperature of the tail gas reaches 30 DEG C before entering the activated carbon fiber adsorption tower, the aromatic hydrocarbon adsorption efficiency is increased, the aromatic hydrocarbon content in the discharged tail gas is reduced, and the steam quantity required in the desorption work is reduced; pVA-based active carbon fibers are used for replacing viscose-based active carbon fibers, the surface area is increased, and the aromatic hydrocarbon adsorption effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial tail gas treatment, in particular to an oxidation tail gas treatment device. Background Art

[0002] Hydrogen peroxide (Hydrogen peroxide) is widely used in the chemical, pharmaceutical, and environmental protection industries. With growing market demand, domestic hydrogen peroxide production capacity is increasing, and competition is intensifying. To enhance competitiveness, companies are placing higher demands on energy conservation and environmental protection.

[0003] During the hydrogen peroxide production process, the oxidation tail gas discharged from the top of the oxidation tower is composed of nitrogen, oxygen, aromatic hydrocarbons, water and other components. If the aromatic hydrocarbons in the tail gas are not treated and recovered, it will not only increase the consumption of aromatic hydrocarbons, but also pollute the environment. At present, the domestic method of recovering aromatic hydrocarbons by using a turboexpander refrigeration and activated carbon fiber adsorption is generally adopted. However, this type of oxidation tail gas treatment has some defects and shortcomings:

[0004] 1. The activated carbon fiber has poor adsorption effect: the temperature of the oxidized exhaust gas after cooling by the turbine expander is too low to reach the optimal temperature for activated carbon fiber adsorption, and more energy is required for heating and desorption in the subsequent desorption work.

[0005] 2. The temperature of the oxidized exhaust gas passing through the expander is not high enough, resulting in poor power generation efficiency. Utility Model Content

[0006] The purpose of the utility model is to provide an oxidation tail gas treatment device to solve the problems of poor adsorption effect of activated carbon fiber and insufficient temperature of oxidation tail gas passing through an expander, resulting in poor power generation efficiency.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an oxidation tail gas treatment device, comprising:

[0008] A hydrogen peroxide oxidation tail gas pipeline, a cold box, a primary separator, a first tail gas heat exchanger, a turbo expansion generator set, a secondary separator, a second tail gas heat exchanger, a cooler in an oxidation tower, an activated carbon fiber adsorption tower and a working fluid / hydrogen peroxide separator. The hydrogen peroxide oxidation tail gas pipeline is connected to the primary separator through a cooling channel of the cold box, the gas phase outlet of the primary separator is connected to the turbo expansion generator set through a heating channel of the first tail gas heat exchanger, the liquid phase outlet of the primary separator is connected to the working fluid / hydrogen peroxide separator, the outlet of the turbo expansion generator set is connected to the secondary separator, the gas phase outlet of the secondary separator is connected to the activated carbon fiber adsorption tower through the heating channel of the cold box, the gas phase outlet of the secondary separator is connected to the activated carbon fiber adsorption tower through the heating channel of the second tail gas heat exchanger, the liquid phase outlet of the secondary separator is connected to the working fluid / hydrogen peroxide separator, the cooler in the oxidation tower is connected to the first tail gas heat exchanger, and the cooler in the oxidation tower is connected to the second tail gas heat exchanger.

[0009] Preferably, a butterfly valve is provided in the middle of the pipeline connecting the primary separator and the turbine expansion generator set, and the butterfly valve is connected in parallel with the first exhaust gas heat exchanger to adjust the temperature of the exhaust gas entering the turbine expansion generator set. A regulating valve is provided at the hot phase inlet position of the first exhaust gas heat exchanger, and a remote thermometer is provided at the inlet end of the turbine expansion generator set to provide direction for the adjustment of the regulating valve at the hot phase inlet position of the first exhaust gas heat exchanger.

[0010] Preferably, the activated carbon fiber adsorption tower includes an activated carbon fiber adsorption box, one end of the activated carbon fiber adsorption box is provided with an air inlet, and the other end of the activated carbon fiber adsorption box is provided with an air outlet, one end of the air outlet is fixedly provided with a centrifugal fan, and the air outlet end of the centrifugal fan is fixedly connected to an exhaust pipe, the middle part of the activated carbon fiber adsorption box is provided with an adsorption component for adsorbing aromatic hydrocarbons, and one end of the inner wall of the activated carbon fiber adsorption box corresponding to the air inlet position is provided with a pre-adsorption component for pre-treating aromatic hydrocarbons, the inner wall of the activated carbon fiber adsorption box corresponding to the position between the adsorption component and the pre-adsorption component is fixedly provided with a switching component for switching the working state of the adsorption component, so that the adsorption component continues to adsorb aromatic hydrocarbons, the top of the activated carbon fiber adsorption box is fixedly connected with a guardrail, and one end of the activated carbon fiber adsorption box is fixedly connected with a staircase.

[0011] Preferably, the adsorption assembly includes a fixed frame fixedly connected to the middle of the activated carbon fiber adsorption box, and a plurality of ventilation frames are fixedly connected to the inner wall of the fixed frame, and the ventilation frames are filled with PVA-based activated carbon fibers. The number of the ventilation frames is six, and every two ventilation frames form a group. The three groups of ventilation frames are arranged in the middle of the inner wall of the activated carbon fiber adsorption box at equal distances. The front and rear ends of the activated carbon fiber adsorption box corresponding to the fixed frame are respectively fixedly connected with sealing plates to prevent the oxidized exhaust gas from being discharged from the air outlet without being filtered by the PVA-based activated carbon fibers inside the ventilation frame. The fixed frame is fixedly connected with a partition plate in the middle of the position between the two adjacent groups of ventilation frames to separate the three groups of ventilation frames. A feed door is provided at the top of the activated carbon fiber adsorption box corresponding to the ventilation frame position, and a guide plate for guiding the PVA-based activated carbon fibers is fixedly connected to the inner wall of the ventilation frame, and a discharge door is provided at the bottom of the activated carbon fiber adsorption box corresponding to the guide plate position, so that when the discharge door is opened, the PVA-based activated carbon fibers in the ventilation frame are guided by the guide plate and discharged from the discharge door.

[0012] Preferably, the pre-adsorption assembly includes two guide rails fixedly connected to the top and bottom of the activated carbon fiber adsorption box, the inner walls of the two guide rails are slidably connected to a movable frame, the middle part of the movable frame is fixedly connected to two ventilation plates, and the space between the two ventilation plates is filled with PVA-based activated carbon fibers, the ventilation plates are movable through and extend to the outside of the activated carbon fiber adsorption box, and the end of the ventilation plate away from the activated carbon fiber adsorption box is fixedly connected to a push-pull plate.

[0013] Preferably, the switching assembly includes a fixed plate fixedly connected to the position of the pre-adsorption assembly on the fixed frame, and the fixed plate is fixedly connected to the inner wall of the activated carbon fiber adsorption box, and the end of the fixed plate away from the position of the fixed frame is movably connected to a movable plate, and the fixed plate and the movable plate are tightly fitted, and ventilation grooves are respectively provided in the middle of the fixed plate and the movable plate, and a handle is fixedly connected to one end of the movable plate, and the handle movably passes through and extends to the outside of the activated carbon fiber adsorption box.

[0014] Preferably, the number of ventilation slots opened in the middle of the fixed plate and the movable plate is three, and in the initial position, the ventilation slots at both ends of the fixed plate and the movable plate overlap with each other, and the ventilation slots in the middle of the fixed plate and the movable plate are staggered with each other.

[0015] Preferably, the fixed plate is fixedly connected to the limiting track at the positions corresponding to the upper and lower ends of the movable plate, and the upper and lower ends of the movable plate are respectively fixedly connected to the limiting frame, and the limiting frame is movably connected to the inner wall of the limiting track, so that the limiting track and the limiting frame cooperate to guide the movement of the movable plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model saves energy by heating the outlet water of the cooler circulating water in the oxidation tower and increases the power generation of the turbo expansion generator set by 60%. At the same time, the temperature of the tail gas before entering the activated carbon fiber adsorption tower reaches 30°C, the aromatic hydrocarbon adsorption efficiency is increased, the aromatic hydrocarbon content in the exhaust gas is reduced, and the amount of steam required for desorption is reduced. PVA-based activated carbon fibers are used instead of viscose-based activated carbon fibers, which increases the surface area and has a better adsorption effect on aromatic hydrocarbons.

[0018] The utility model also provides a ventilation plate and the PVA-based activated carbon fibers inside the ventilation plate, which can pre-filter the oxidized exhaust gas entering through the air inlet. When the filtering effect of the ventilation plate combined with the PVA-based activated carbon fibers deteriorates, the ventilation plate can be separated from the activated carbon fiber adsorption box along the direction of the guide rail by hand-pulling the guide rail, and the new ventilation plate can be reinserted into the inner wall of the guide rail, thereby completing the replacement of the ventilation plate. The pre-adsorption component can realize pre-treatment of the oxidized exhaust gas to absorb aromatic hydrocarbons while facilitating the replacement of the ventilation plate with deteriorated filtering effect.

[0019] The utility model also drives the movable plate to move by manually driving the handle, and makes the ventilation slots at both ends of the movable plate intertwine with the ventilation slots at both ends of the fixed plate, and at the same time the ventilation slots in the middle of the movable plate overlap with the ventilation slots in the middle of the fixed plate. At this time, the discharge door at the bottom of the ventilation frame that is no longer in a working state is opened, so that the PVA-based activated carbon fiber inside the ventilation frame that is not in a working state falls under the guidance of the guide plate, and then the discharge door is closed, and the feed door at the top of the ventilation frame that is not in a working state is opened, and the PVA-based activated carbon fiber is added again to the interior of the ventilation frame that is not in a working state and has no activated carbon inside, thereby achieving the purpose of sustainable oxidation exhaust gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart of the overall structure of an oxidation tail gas treatment device of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of an activated carbon fiber adsorption tower of an oxidation tail gas treatment device of the utility model;

[0022] Figure 3 This is a cross-sectional view of the structure of an activated carbon fiber adsorption box of an oxidation tail gas treatment device of the utility model;

[0023] Figure 4 This utility model is an activated carbon fiber adsorption box structure explosion of an oxidation tail gas treatment device Figure 1 ;

[0024] Figure 5 This utility model is an activated carbon fiber adsorption box structure explosion of an oxidation tail gas treatment device Figure 2 .

[0025] Figure: 1. Hydrogen peroxide oxidation tail gas pipeline; 2. Cold box; 3. Primary separator; 4. First tail gas heat exchanger; 5. Turbine expansion generator set; 6. Secondary separator; 7. Second tail gas heat exchanger; 8. Oxidation tower cooler; 9. Activated carbon fiber adsorption tower; 10. Working fluid / hydrogen peroxide separator.

[0026] 91. Activated carbon fiber adsorption box; 92. Air inlet; 93. Air outlet; 94. Centrifugal fan; 95. Exhaust pipe;

[0027] 961, fixed frame; 962, ventilation frame; 963, sealing plate; 964, partition; 965, feed door; 966, guide plate; 967, discharge door;

[0028] 971, guide rail; 972, movable frame; 973, ventilation plate; 974, push-pull plate;

[0029] 981, fixed plate; 982, movable plate; 983, ventilation slot; 984, handle;

[0030] 99. Guardrail. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-5 The utility model provides a technical solution: an oxidation tail gas treatment device, comprising:

[0033] The hydrogen peroxide oxidation tail gas pipeline 1, the cold box 2, the primary separator 3, the first tail gas heat exchanger 4, the turbo expansion generator set 5, the secondary separator 6, the second tail gas heat exchanger 7, the cooler 8 in the oxidation tower, the activated carbon fiber adsorption tower 9 and the working fluid / hydrogen peroxide separator 10, the hydrogen peroxide oxidation tail gas pipeline 1 is connected to the primary separator 3 through the cooling channel of the cold box 2, the gas phase outlet of the primary separator 3 is connected to the turbo expansion generator set 5 through the heating channel of the first tail gas heat exchanger 4, the liquid phase outlet of the primary separator 3 is connected to the working fluid / hydrogen peroxide separator 10, the outlet of the turbo expansion generator set 5 is connected to the secondary separator 6, and the gas phase outlet of the secondary separator 6 is connected to the activated carbon fiber adsorption tower 9 through the heating channel of the cold box 2 The gas phase outlet of the secondary separator 6 is connected to the activated carbon fiber adsorption tower 9 through the heating channel of the second tail gas heat exchanger 7, the liquid phase outlet of the secondary separator 6 is connected to the working fluid / hydrogen peroxide separator 10, the cooler 8 in the oxidation tower is connected to the first tail gas heat exchanger 4, and the cooler 8 in the oxidation tower is connected to the second tail gas heat exchanger 7. A butterfly valve is provided in the middle of the pipeline connecting the primary separator 3 and the turbo expansion generator set 5, and the butterfly valve is connected in parallel with the first tail gas heat exchanger 4 to adjust the temperature of the tail gas entering the turbo expansion generator set 5. A regulating valve is provided at the hot phase inlet position of the first tail gas heat exchanger 4, and a remote thermometer is provided at the inlet end of the turbo expansion generator set 5 to provide direction for the adjustment of the regulating valve at the hot phase inlet position of the first tail gas heat exchanger 4;

[0034] When the above structure is in use, energy is saved by heating the outlet water of the cooler 8 in the oxidation tower, and the power generation of the turboexpansion generator set 5 is increased by 60%. At the same time, the temperature of the exhaust gas before entering the activated carbon fiber adsorption tower 9 reaches 30°C, the aromatic hydrocarbon adsorption efficiency is increased, the aromatic hydrocarbon content in the exhaust gas is reduced, and the amount of steam required for desorption work is reduced. PVA-based activated carbon fiber is used instead of viscose-based activated carbon fiber, the surface area is increased, and the adsorption effect on aromatic hydrocarbons is better.

[0035] The activated carbon fiber adsorption tower 9 includes an activated carbon fiber adsorption box 91, an air inlet 92 is provided at one end of the activated carbon fiber adsorption box 91, and an air outlet 93 is provided at the other end of the activated carbon fiber adsorption box 91, a centrifugal fan 94 is fixedly provided at one end of the air outlet 93, and an exhaust pipe 95 is fixedly installed at the air outlet end of the centrifugal fan 94, an adsorption component for adsorbing aromatic hydrocarbons is provided in the middle of the activated carbon fiber adsorption box 91, and a pre-adsorption component for pre-treating aromatic hydrocarbons is provided at one end of the inner wall of the activated carbon fiber adsorption box 91 corresponding to the air inlet 92. A switching component for switching the working state of the adsorption component is fixedly provided on the inner wall between the adsorption component and the pre-adsorption component, so that the adsorption component can continuously adsorb aromatic hydrocarbons. A guardrail 99 is fixedly installed on the top of the activated carbon fiber adsorption box 91, and a staircase is fixedly installed at one end of the activated carbon fiber adsorption box 91. The adsorption component includes a fixed frame 961 fixedly installed in the middle of the activated carbon fiber adsorption box 91, and a plurality of ventilation frames 962 are fixedly installed on the inner wall of the fixed frame 961. The ventilation frames 962 are filled with PVA-based activated carbon fibers. There are six ventilation frames 962, and every two ventilation frames 962 is a group, and three groups of ventilation frames 962 are arranged at equal distances in the middle of the inner wall of the activated carbon fiber adsorption box 91. The front and rear ends of the fixed frame 961 corresponding to the activated carbon fiber adsorption box 91 are fixedly installed with sealing plates 963 to prevent the oxidized exhaust gas from being discharged from the air outlet 93 without being filtered by the PVA-based activated carbon fibers inside the ventilation frame 962. A partition plate 964 is fixedly installed in the middle of the position between the two adjacent groups of ventilation frames 962 of the fixed frame 961 to separate the three groups of ventilation frames 962. The top of the activated carbon fiber adsorption box 91 corresponding to the ventilation frame 962 is provided with an inlet. The material door 965 and the inner wall of the ventilation frame 962 are fixedly installed with a guide plate 966 for guiding the PVA-based activated carbon fibers, and a discharge door 967 is provided at the bottom of the activated carbon fiber adsorption box 91 corresponding to the position of the guide plate 966, so that when the discharge door 967 is opened, the PVA-based activated carbon fibers in the ventilation frame 962 are guided by the guide plate 966 and discharged outward from the discharge door 967. The interior of the ventilation frame 962 is filled with PVA-based activated carbon fibers. When the oxidized exhaust gas passes through the fixed frame 961 and the ventilation frame 962, the aromatic hydrocarbons in the oxidized exhaust gas will be more effectively adsorbed.

[0036] The pre-adsorption assembly includes two guide rails 971 fixedly mounted on the top and bottom of the activated carbon fiber adsorption box 91, the inner walls of the two guide rails 971 are slidably connected to a movable frame 972, two ventilation plates 973 are fixedly mounted in the middle of the movable frame 972, and the space between the two ventilation plates 973 is filled with PVA-based activated carbon fibers, the ventilation plates 973 are movable through and extend to the outside of the activated carbon fiber adsorption box 91, and a push-pull plate 974 is fixedly mounted on one end of the ventilation plate 973 away from the activated carbon fiber adsorption box 91, and suction is generated by the operation of the centrifugal fan 94, so that the oxidized exhaust gas discharged through the cold box 2 and the second exhaust heat exchanger 7 enters the activated carbon fiber adsorption box 91 through the air inlet 92. In the carbon fiber adsorption box 91, by setting a ventilation plate 973 and the PVA-based activated carbon fibers inside it, the oxidized exhaust gas entering through the air inlet 92 can be pre-filtered, and when the filtering effect of the ventilation plate 973 and the PVA-based activated carbon fibers deteriorates, the ventilation plate 973 can be pulled out of the activated carbon fiber adsorption box 91 along the direction of the guide rail 971 by hand, and the new ventilation plate 973 can be reinserted into the inner wall of the guide rail 971, thereby completing the replacement of the ventilation plate 973. The pre-adsorption component can realize the pre-treatment of the oxidized exhaust gas to absorb aromatic hydrocarbons while facilitating the replacement of the ventilation plate 973 with deteriorated filtering effect.

[0037] The switching assembly includes a fixed plate 981 fixedly mounted on the fixed frame 961 at the position of the pre-adsorption assembly, and the fixed plate 981 is fixedly mounted on the inner wall of the activated carbon fiber adsorption box 91, and the end of the fixed plate 981 away from the fixed frame 961 is movably connected to the movable plate 982, and the fixed plate 981 and the movable plate 982 are tightly fitted, and ventilation slots 983 are respectively provided in the middle of the fixed plate 981 and the movable plate 982. A handle 984 is fixedly mounted on one end of the movable plate 982, and the handle 984 is movable through and extends to the outside of the activated carbon fiber adsorption box 91. 81 and the number of ventilation slots 983 opened in the middle of the movable plate 982 is three, and in the initial position, the ventilation slots 983 at both ends of the fixed plate 981 and the movable plate 982 overlap with each other, and the ventilation slots 983 at the middle positions of the fixed plate 981 and the movable plate 982 are staggered with each other, and the fixed plate 981 is fixedly installed with limit rails at the positions of the upper and lower ends of the movable plate 982, and the upper and lower ends of the movable plate 982 are respectively fixedly installed with limit frames, and the limit frames are movably connected to the inner wall of the limit rail, so that the limit rail and the limit frame cooperate to guide the movement of the movable plate 982;

[0038] The movable plate 982 is moved by manually driving the handle 984, and the ventilation slots 983 at both ends of the movable plate 982 are staggered with the ventilation slots 983 at both ends of the fixed plate 981. At the same time, the ventilation slots 983 in the middle of the movable plate 982 overlap with the ventilation slots 983 in the middle of the fixed plate 981. At this time, the discharge door 967 at the bottom of the ventilation frame 962 that is no longer in a working state is opened, so that the PVA-based activated carbon fiber inside the ventilation frame 962 that is no longer in a working state falls under the guidance of the guide plate 966, and then the discharge door 967 is closed, and the feed door 965 at the top of the non-working ventilation frame 962 is opened, and the PVA-based activated carbon fiber is added again to the ventilation frame 962 that is no longer in a working state and has no activated carbon inside, thereby achieving the purpose of sustainable oxidation exhaust gas treatment.

[0039] When in use, the utility model saves energy by heating the outlet water of the cooler 8 in the oxidation tower, and increases the power generation of the turbo expansion generator set 5 by 60%. At the same time, the temperature of the exhaust gas before entering the activated carbon fiber adsorption tower 9 reaches 30°C, the aromatic hydrocarbon adsorption efficiency is increased, the aromatic hydrocarbon content in the exhaust gas is reduced, and the amount of steam required for desorption is reduced. PVA-based activated carbon fiber is used instead of viscose-based activated carbon fiber, the surface area is increased, and the aromatic hydrocarbon adsorption effect is better. Suction is generated by the operation of the centrifugal fan 94, and the oxidized exhaust gas discharged through the cold box 2 and the second exhaust heat exchanger 7 enters the activated carbon fiber adsorption box 9 through the air inlet 92. 1, wherein the ventilation plate 973 and the PVA-based activated carbon fibers therein are provided to pre-filter the oxidized tail gas entering through the air inlet 92, and when the filtering effect of the ventilation plate 973 in combination with the PVA-based activated carbon fibers deteriorates, the ventilation plate 973 can be pulled out of the activated carbon fiber adsorption box 91 along the direction of the guide rail 971 by hand, and a new ventilation plate 973 can be reinserted into the inner wall of the guide rail 971, thereby completing the replacement of the ventilation plate 973. The pre-adsorption component facilitates the replacement of the ventilation plate 973 with a deteriorated filtering effect while achieving pre-treatment of the oxidized tail gas to absorb aromatic hydrocarbons.

[0040] The oxidized exhaust gas then passes through the intersection of the fixed plate 981 and the movable plate 982 and enters the interior of the fixed frame 961. The interior of the ventilation frame 962 is filled with PVA-based activated carbon fibers. When the oxidized exhaust gas passes through the fixed frame 961 and the ventilation frame 962, the aromatic hydrocarbons in the oxidized exhaust gas are more effectively adsorbed.

[0041] When the PVA-based activated carbon fibers inside the ventilation frame 962 need to be replaced, the movable plate 982 is moved by manually driving the handle 984, and the ventilation slots 983 at both ends of the movable plate 982 are staggered with the ventilation slots 983 at both ends of the fixed plate 981. At the same time, the ventilation slots 983 in the middle of the movable plate 982 overlap with the ventilation slots 983 in the middle of the fixed plate 981. That is, the ventilation frame 962 in the filtering working state is now changed from the two groups of PVA-based activated carbon fibers inside the ventilation frames 962 at both ends to the current group of PVA-based activated carbon fibers inside the ventilation frame 962 located in the middle. Then, the oxidized exhaust gas no longer passes through the activated carbon fiber adsorption box 91 through the ventilation frames 962 at both ends of the fixed plate 981, but passes through the activated carbon fiber through the group of ventilation slots 983 in the middle. Adsorption box 91, then open the discharge door 967 located at the bottom of the ventilation frame 962 that is no longer in working state, so that the PVA-based activated carbon fiber inside the ventilation frame 962 that is no longer in working state will fall under the guidance of the guide plate 966, and then close the discharge door 967, and open the feed door 965 located at the top of the non-working ventilation frame 962, and add PVA-based activated carbon fiber to the ventilation frame 962 that is not in working state and has no activated carbon inside, so as to achieve the purpose of sustainable oxidation exhaust gas treatment. On the contrary, when the PVA-based activated carbon fiber needs to be replaced in the middle, the ventilation slots 983 at both ends of the fixed plate 981 and the movable plate 982 overlap, and the ventilation slots 983 in the middle are staggered with each other. At this time, the PVA-based activated carbon fiber can be replaced for a group of ventilation frames 962 in the middle.

Claims

1. An oxidation tail gas treatment device, characterized in that: include: A hydrogen peroxide oxidation tail gas pipeline (1), a cold box (2), a primary separator (3), a first tail gas heat exchanger (4), a turbine expansion generator set (5), a secondary separator (6), a second tail gas heat exchanger (7), a cooler (8) in an oxidation tower, an activated carbon fiber adsorption tower (9) and a working fluid / hydrogen peroxide separator (10), wherein the hydrogen peroxide oxidation tail gas pipeline (1) is connected to the primary separator (3) through a cooling channel of the cold box (2), a gas phase outlet of the primary separator (3) is connected to the turbine expansion generator set (5) through a heating channel of the first tail gas heat exchanger (4), and a liquid phase outlet of the primary separator (3) is connected to the working fluid / hydrogen peroxide separator (10). The separator (10) is connected, the outlet of the turbine expansion generator set (5) is connected to the secondary separator (6), the gas phase outlet of the secondary separator (6) is connected to the activated carbon fiber adsorption tower (9) through the heating channel of the cold box (2), the gas phase outlet of the secondary separator (6) is connected to the activated carbon fiber adsorption tower (9) through the heating channel of the second tail gas heat exchanger (7), the liquid phase outlet of the secondary separator (6) is connected to the working fluid / hydrogen peroxide separator (10), the cooler (8) in the oxidation tower is connected to the first tail gas heat exchanger (4), and the cooler (8) in the oxidation tower is connected to the second tail gas heat exchanger (7).

2. The oxidation tail gas treatment device according to claim 1, characterized in that: A butterfly valve is provided in the middle of the pipeline connecting the primary separator (3) and the turbo expansion generator set (5), and the butterfly valve is connected in parallel with the first exhaust gas heat exchanger (4) for regulating the temperature of the exhaust gas entering the turbo expansion generator set (5). A regulating valve is provided at the hot phase inlet position of the first exhaust gas heat exchanger (4), and a remote thermometer is provided at the inlet end of the turbo expansion generator set (5) to provide direction for regulating the regulating valve at the hot phase inlet position of the first exhaust gas heat exchanger (4).

3. The oxidation tail gas treatment device according to claim 1, characterized in that: The activated carbon fiber adsorption tower (9) includes an activated carbon fiber adsorption box (91), one end of the activated carbon fiber adsorption box (91) is provided with an air inlet (92), and the other end of the activated carbon fiber adsorption box (91) is provided with an air outlet (93), one end of the air outlet (93) is fixedly provided with a centrifugal fan (94), and the air outlet end of the centrifugal fan (94) is fixedly connected to an exhaust pipe (95), the middle part of the activated carbon fiber adsorption box (91) is provided with an adsorption component for adsorbing aromatic hydrocarbons, and one end of the inner wall of the activated carbon fiber adsorption box (91) corresponding to the position of the air inlet (92) is provided with a pre-adsorption component for pre-treating aromatic hydrocarbons, the inner wall of the activated carbon fiber adsorption box (91) corresponding to the position between the adsorption component and the pre-adsorption component is fixedly provided with a switching component for switching the working state of the adsorption component, so that the adsorption component continuously adsorbs aromatic hydrocarbons, the top of the activated carbon fiber adsorption box (91) is fixedly connected with a guardrail (99), and one end of the activated carbon fiber adsorption box (91) is fixedly connected with a staircase.

4. The oxidation tail gas treatment device according to claim 3, characterized in that: The adsorption assembly includes a fixed frame (961) fixedly connected to the middle of the activated carbon fiber adsorption box (91), the inner wall of the fixed frame (961) is fixedly connected with a plurality of ventilation frames (962), the interior of the ventilation frames (962) is filled with PVA-based activated carbon fibers, the number of the ventilation frames (962) is six, and every two ventilation frames (962) form a group, and three groups of ventilation frames (962) are arranged in the middle of the inner wall of the activated carbon fiber adsorption box (91) at equal distances, and the front and rear ends of the activated carbon fiber adsorption box (91) corresponding to the fixed frame (961) are respectively fixedly connected with a sealing plate (963), so as to prevent the oxidized exhaust gas from being filtered by the PVA-based activated carbon fibers inside the ventilation frame (962) and discharged from the air outlet (93 ) is discharged, a partition (964) is fixedly connected to the middle of the position between the two adjacent groups of ventilation frames (962) of the fixed frame (961) to separate the three groups of ventilation frames (962), a feed door (965) is provided on the top of the position of the activated carbon fiber adsorption box (91) corresponding to the ventilation frame (962), a guide plate (966) for guiding the PVA-based activated carbon fibers is fixedly connected to the inner wall of the ventilation frame (962), and a discharge door (967) is provided at the bottom of the activated carbon fiber adsorption box (91) corresponding to the guide plate (966), so that when the discharge door (967) is opened, the PVA-based activated carbon fibers in the ventilation frame (962) are discharged outward from the discharge door (967) through the guidance of the guide plate (966).

5. The oxidation tail gas treatment device according to claim 4, characterized in that: The pre-adsorption assembly includes two guide rails (971) fixedly connected to the top and bottom of the activated carbon fiber adsorption box (91), the inner walls of the two guide rails (971) are slidably connected to a movable frame (972), the middle of the movable frame (972) is fixedly connected to two ventilation plates (973), and the space between the two ventilation plates (973) is filled with PVA-based activated carbon fibers, the ventilation plates (973) are movably passed through and extended to the outside of the activated carbon fiber adsorption box (91), and the end of the ventilation plate (973) away from the activated carbon fiber adsorption box (91) is fixedly connected to a push-pull plate (974).

6. The oxidation tail gas treatment device according to claim 5, characterized in that: The switching assembly includes a fixed plate (981) fixedly connected to a position of the fixed frame (961) corresponding to the pre-adsorption assembly, and the fixed plate (981) is fixedly connected to the inner wall of the activated carbon fiber adsorption box (91), and one end of the fixed plate (981) away from the position of the fixed frame (961) is movably connected to a movable plate (982), and the fixed plate (981) and the movable plate (982) are tightly fitted, and ventilation slots (983) are respectively opened in the middle of the fixed plate (981) and the movable plate (982), and one end of the movable plate (982) is fixedly connected to a handle (984), and the handle (984) movably passes through and extends to the outside of the activated carbon fiber adsorption box (91).

7. The oxidation tail gas treatment device according to claim 6, characterized in that: The number of ventilation slots (983) opened in the middle of the fixed plate (981) and the movable plate (982) is three, and in the initial position, the ventilation slots (983) at both ends of the fixed plate (981) and the movable plate (982) overlap with each other, and the ventilation slots (983) at the middle positions of the fixed plate (981) and the movable plate (982) are staggered with each other.

8. The oxidation tail gas treatment device according to claim 7, characterized in that: The fixed plate (981) is fixedly connected to the limiting track at positions corresponding to the upper and lower ends of the movable plate (982), and the upper and lower ends of the movable plate (982) are respectively fixedly connected to the limiting frame, and the limiting frame is movably connected to the inner wall of the limiting track, so that the limiting track and the limiting frame cooperate to guide the movement of the movable plate (982).

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