Waste sulfuric acid nitrotoluene compound separation device

Abstract

The invention discloses a waste sulfuric acid nitrotoluene compound separation device, and solves the problems that dilute nitric acid doped in waste sulfuric acid in a waste acid tank is easily pumped into a dispersion pipe when a nitro compound is pressed into the dispersion pipe by adopting a liquid ring vacuum pump in an existing device, and a countercurrent contact mechanism is not arranged when the nitro compound is separated from the waste sulfuric acid; the device comprises a device support, a waste acid treatment tank, a device driving mechanism and an auxiliary separation mechanism, the device support comprises a tank support and an auxiliary support, and the auxiliary separation mechanism comprises a separation linkage rod, an adjustable tower plate part and an auxiliary separation part; the device is provided with the auxiliary separation mechanism and the device driving mechanism, the auxiliary separation mechanism is composed of the separation linkage rod, the adjustable tower plate part and the auxiliary separation part, the arrangement of the adjustable tower plate part enables waste sulfuric acid and nitrotoluene compounds to be in effective countercurrent contact, and rapid separation of the waste sulfuric acid and the nitrotoluene compounds is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of waste acid recovery, and in particular relates to a waste sulfuric acid-nitrotoluene compound separation device. Background Art

[0002] Nitrotoluene is an important organic compound, which is widely used in dyes, medicines, pesticides and other fields. Common nitrotoluene compounds include o-nitrotoluene, m-nitrotoluene and trinitrotoluene. In the synthesis and preparation process of nitrotoluene compounds, concentrated sulfuric acid is used as a catalyst to promote the nitration reaction between toluene and nitric acid. At the same time, sulfuric acid can also be used as a water absorbent to improve the reaction conversion rate and provide an acidic medium that is conducive to the formation of nitroxyl cations. These effects jointly ensure the smooth progress of the nitrotoluene synthesis reaction and the realization of high yield. After the preparation of the nitrotoluene compounds, the waste sulfuric acid in the reaction system needs to be recovered and treated to avoid direct discharge of waste sulfuric acid to pollute the environment.

[0003] Chinese patent CN110170185B discloses a device and method for separating nitro compounds from waste sulfuric acid, the device comprising a waste acid tank, the upper left portion of the waste acid tank being connected to a waste acid / nitro compound feed pipe, the upper right portion of the waste acid tank being connected to a dispersion pipe on a separator via a nitro compound pipeline, the top of the separator being connected to a liquid ring vacuum pump via an exhaust pipe, the inlet and outlet pipes of the liquid ring vacuum pump being connected via a reflux valve, the left side of the separator being connected to a mononitrotoluene discharge pipe 1, a transfer tank, and a mononitrotoluene discharge pipe 2 which are connected in sequence, The output of the mononitrotoluene pump is connected to the DNT tank, a sight glass is provided on the right side of the separator, and the bottom of the separator is connected to the polymer discharge pipe. However, when the existing device uses a liquid ring vacuum pump to press the nitro compound into the dispersion pipe, the dilute nitric acid mixed in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion pipe, and no countercurrent contact mechanism is provided when the nitro compound is separated from the waste sulfuric acid, so that the waste sulfuric acid and the nitro compound cannot be effectively countercurrently contacted, affecting the separation and purification efficiency of the nitro compound. In view of the above problems, we propose a waste sulfuric acid nitrotoluene compound separation device. Summary of the invention

[0004] The object of the present invention is to provide a waste sulfuric acid nitrotoluene compound separation device in view of the shortcomings of the prior art, which solves the problem that when the prior device uses a liquid ring vacuum pump to press the nitro compound into a dispersion pipe, the dilute nitric acid mixed in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion pipe, and no countercurrent contact mechanism is set when the nitro compound is separated from the waste sulfuric acid, so that the waste sulfuric acid and the nitro compound cannot be effectively countercurrently contacted, thereby affecting the separation and purification efficiency of the nitro compound.

[0005] The present invention is achieved by providing a waste sulfuric acid nitrotoluene compound separation device, the waste sulfuric acid nitrotoluene compound separation device comprising: A device bracket, the device bracket comprising a tank bracket and an auxiliary bracket fixedly connected to the tank bracket; A waste acid treatment tank, wherein the waste acid treatment tank is fixedly mounted on the tank bracket, a treatment tank cover is arranged on the top of the waste acid treatment tank, an acid discharge seat is arranged on the bottom of the waste acid treatment tank, and a waste acid manifold, a nitration recovery part, and a compound discharge pipe are arranged on the treatment tank cover respectively; The device driving mechanism is arranged on the tank support, and the device driving mechanism includes a driving motor, a separation driving part, and a discrete driving part. The driving motor is connected to the separation driving part, and the separation driving part is connected to the discrete driving part; An auxiliary separation mechanism, the auxiliary separation mechanism is arranged in the waste acid treatment tank, and the auxiliary separation mechanism is used to assist in the separation of sulfuric acid, nitric acid, and nitrotoluene compounds; Wherein, the auxiliary separation mechanism comprises: A separation linkage rod, wherein the separation linkage rod is disposed in the waste acid treatment tank, and one end of the separation linkage rod is connected to the separation drive unit; An adjustable tray portion, wherein the adjustable tray portion is arranged in the waste acid treatment tank, and the adjustable tray portion is used to increase the contact area between the mixture and the steam in the waste acid treatment tank, and to provide a deceleration protection for the rotation of the separation linkage rod; The auxiliary separation part is arranged below the adjustable tower plate part, the auxiliary separation part is connected with the separation linkage rod, and is used for auxiliary separation of nitric acid and nitrotoluene compounds in the waste sulfuric acid and uniform heating of the waste sulfuric acid.

[0006] Preferably, the separation drive unit comprises: A first rotating wheel, wherein the first rotating wheel is fixedly connected to an output end of the driving motor; Rotating a second rotating wheel installed above the cover plate of the processing tank, the first rotating wheel and the second rotating wheel are rotatably connected via a conveyor belt, and the lower part of the second rotating wheel is fixedly connected to the end of the separation linkage rod; A linkage gear ring is fixedly mounted on the second rotating wheel and is connected to the discrete driving part.

[0007] Preferably, the auxiliary separation mechanism further comprises: At least one set of upper spoiler paddles, the upper spoiler paddles are fixedly mounted on the separation linkage rod, and the upper spoiler paddles are used to spoil the nitrotoluene compound in the waste acid treatment tank and assist the nitrotoluene compound to flow into the compound discharge pipe; The compound shifting assembly is arranged in the cover plate of the treatment tank, the compound shifting assembly is connected to the separation linkage rod, and the compound shifting assembly is used to shift the nitrotoluene compound at the center of the waste acid treatment tank to the edge.

[0008] Preferably, the compound dialing assembly comprises: A first gear, wherein the first gear is fixedly sleeved on the separation linkage rod; A reciprocating gear seat, wherein the reciprocating gear seat is sleeved on the outside of the first gear, and the inner wall of the reciprocating gear seat is meshed with the first gear for transmission; At least one set of reciprocating toggle seats, the reciprocating toggle seats are fixedly mounted on both sides of the reciprocating tooth seat, and the reciprocating toggle seats are used to toggle the nitrotoluene compound to the edge; A gear seat guide rail is fixedly embedded in the treatment tank cover plate, and the reciprocating gear seat is slidably installed in the gear seat guide rail.

[0009] Preferably, the adjustable tray section comprises: A spiral heating tube, wherein the spiral heating tube is fixedly embedded in the inner wall of the waste acid treatment tank, and the spiral heating tube is used to heat the waste acid treatment tank; At least one set of swinging tower plates, the swinging tower plates are movably arranged in the waste acid treatment tank, a tower plate driving groove is opened at the center of the swinging tower plates, and at least one set of tower plate limiting grooves is opened at the edge of the swinging tower plates; At least one group of material guiding holes, wherein the material guiding holes are provided in the swinging plate, and the material guiding holes are used to guide the mixture and steam in the waste acid treatment tank and to assist in increasing the contact area between the mixture and the steam; A driving cam is fixedly sleeved on the outer wall of the separation linkage rod, and the driving cam is movably embedded in the driving groove of the tower plate; At least one set of tower plate limiting rods is fixedly mounted on the inner wall of the waste acid treatment tank, the tower plate limiting rods are slidably connected to the tower plate limiting grooves, and tower plate positioning seats are fixedly mounted on the upper and lower sides of the tower plate limiting rods.

[0010] Preferably, the auxiliary separation unit comprises: At least one set of auxiliary hinged rods, wherein the auxiliary hinged rods are hingedly mounted on the lower end of the separation linkage rod; Rotating a separation linkage seat arranged at the bottom of the inner cavity of the waste acid treatment tank, wherein at least one set of driving pins is fixedly installed on the separation linkage seat; At least one set of swing release seats, the swing release seats are rotatably sleeved on the separation linkage seat, at least one set of helical tooth grooves are provided in the swing release seats, and the helical tooth grooves are meshed with the driving pin shaft for transmission; A swing positioning seat, the swing positioning seat is rotatably connected to the swing release seat, the swing positioning seat is used to support and guide the swing release seat to limit the position, and the swing positioning seat is fixedly connected to the inner wall of the waste acid treatment tank; A release nozzle, wherein the release nozzle is fixedly installed in a swing positioning seat, one side of the release nozzle is connected to a spiral guide pipe through a telescopic pipe, and the spiral guide pipe is fixedly arranged in the waste acid treatment tank; A steam injection pipe is fixedly installed at the bottom of the waste acid treatment tank, and one end of the steam injection pipe is connected to the spiral guide pipe.

[0011] Preferably, it also includes a compound separator, which is fixedly mounted on the auxiliary bracket and is used to assist in separating nitro compounds and nitrogen oxide gas. The compound separator includes: A negative pressure separation tank, wherein the negative pressure separation tank is fixedly mounted on an auxiliary bracket; A negative pressure exhaust pump is arranged on one side of the negative pressure separation tank, and the negative pressure exhaust pump is used to extract and recover the nitrogen oxide gas; A compound discharge port, which is arranged at the bottom of the negative pressure separation tank and is used to discharge the separated nitro compound; The compound discrete component is arranged on one side of the negative pressure separation tank, the compound discrete component is connected to the compound discharge pipe, and the compound discrete component is also connected to the discrete drive part. The compound discrete component is used for discrete processing of nitrotoluene compounds and assists in separating nitrotoluene compounds and nitrogen oxide gas.

[0012] Preferably, the discrete drive unit comprises: A second gear, the second gear is arranged above the linkage gear ring, and the second gear and the linkage gear ring are meshed for transmission; A discrete drive shaft, the discrete drive shaft is rotatably arranged on the treatment tank cover plate, one end of the discrete drive shaft is fixedly connected to the second gear, and the other end of the discrete drive shaft is fixedly connected to the third gear; A fourth gear is arranged below the third gear, the fourth gear is meshed with the third gear for transmission, and the fourth gear is connected to the compound discrete component.

[0013] Preferably, the compound discrete components include: A discrete positioning seat, wherein the discrete positioning seat is fixedly mounted on the inner wall of the negative pressure separation tank, and at least one group of discrete positioning grooves is provided in the discrete positioning seat; A discrete adjustment seat, wherein the discrete adjustment seat is arranged on one side of the discrete positioning seat, and at least one group of discrete adjustment slots is opened in the discrete adjustment seat; A spiral discrete tube, wherein the spiral discrete tube is fixedly installed in the fourth gear, one end of the spiral discrete tube is rotatably connected to the compound discharge tube, and the other end of the spiral discrete tube is fixedly connected to a discrete adjustment seat; A discrete sealing cover, which is arranged on one side of the discrete adjustment seat, and is used to seal the spiral discrete tube, and the discrete sealing cover is rotationally connected to the spiral discrete tube; A discrete linkage block, wherein the discrete linkage block is disposed in the discrete adjustment slot and is also slidably connected to the discrete positioning slot; A compound conducting pipe fixedly connected to the discrete linkage block, the compound conducting pipe is slidably connected to the side wall of the discrete sealing cover, and a compound shunt pipe is detachably mounted on the end of the compound conducting pipe.

[0014] Preferably, the nitrification recovery unit comprises: A nitric acid reflux pipe, wherein the nitric acid reflux pipe is fixedly mounted on a cover plate of the treatment tank; a nitric acid pump connected to the nitric acid return line, and A nitric acid recovery tank is fixedly mounted on the tank bracket, and the nitric acid recovery tank is connected to a nitric acid suction pump.

[0015] Compared with the prior art, the embodiments of the present application have the following beneficial effects: In the embodiment of the present invention, an auxiliary separation mechanism and a device driving mechanism are provided, the auxiliary separation mechanism is composed of a separation linkage rod, an adjustable tray portion, and an auxiliary separation portion, the separation linkage rod is driven by the device driving mechanism to synchronously drive the adjustable tray portion and the auxiliary separation portion to move, the adjustable tray portion and the auxiliary separation portion cooperate to not only release the pumped hot steam evenly, ensure that the material in the waste acid treatment tank is heated evenly, but also increase the contact area between the mixture in the waste acid treatment tank and the steam, and decelerate the rotation of the separation linkage rod, the setting of the adjustable tray portion enables the waste sulfuric acid and the nitro compound to be effectively countercurrently contacted, ensure that the nitrotoluene compound in the waste sulfuric acid after the separation of dilute nitric acid is separated to the top of the waste acid treatment tank, and realize the rapid separation of the waste sulfuric acid and the nitrotoluene compound. The invention overcomes the problem that when the existing device uses a liquid ring vacuum pump to press the nitro compound into the dispersion pipe, the dilute nitric acid doped in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion pipe, and the countercurrent contact mechanism is not provided when the nitro compound is separated from the waste sulfuric acid, so that the waste sulfuric acid and the nitro compound cannot be effectively countercurrently contacted, which affects the separation and purification efficiency of the nitro compound.

[0016] In the embodiment of the present invention, an upper spoiler paddle and a compound moving assembly are provided which cooperate with each other. The upper spoiler paddle and the compound moving assembly cooperate with each other to move the nitrotoluene compound after heating and negative pressure separation to the top position of the inner cavity of the waste acid treatment tank, thereby facilitating the flow of the nitrotoluene compound into the compound discharge pipe, reducing the difficulty of separating the waste sulfuric acid and improving the separation efficiency.

[0017] In an embodiment of the present invention, an adjustable tower plate portion is provided, and the adjustable tower plate portion is composed of a swinging tower plate, a material guide leakage hole, and a driving cam. The swinging tower plate can be driven by the driving cam to move in a circumferential swinging manner in the waste acid treatment tank. On the one hand, the waste sulfuric acid and the nitro compound can be effectively contacted with each other in countercurrent, and the adsorption of nitrotoluene compounds on their surfaces is avoided. The setting of the material guide leakage hole can enable the steam to fully contact with the material when the hot steam is released, which helps the nitro compound to form fine droplets or films, increases the surface area of ​​the phase mass transfer, thereby improving the mass transfer rate, and ensuring the separation efficiency of the waste sulfuric acid and the nitrotoluene compounds. On the other hand, the setting of the swinging tower plate can perform multi-stage deceleration processing on the separation linkage rod, thereby avoiding the risk of splashing and overheating caused by violent stirring of the waste sulfuric acid.

[0018] In the embodiment of the present invention, an auxiliary separation part is provided, which is composed of a separation linkage seat, a swing release seat, a release nozzle, and a spiral guide tube. The separation linkage seat, the swing release seat, the release nozzle, and the spiral guide tube cooperate with each other to ensure that the steam is evenly released through the release nozzle, and the release angle of the steam nozzle can be adjusted by the separation linkage rod, thereby ensuring the rapid and efficient separation and volatilization of dilute nitric acid in the waste sulfuric acid, and reducing the difficulty of separating the waste sulfuric acid and nitrotoluene compounds.

[0019] In the embodiment of the present invention, a compound discrete component is provided, which can fully discrete the separated nitrotoluene compound droplet film, thereby ensuring the efficient separation and release of the nitric oxide gas and avoiding the interference of the nitrotoluene compound droplet film with the purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a waste sulfuric acid nitrotoluene compound separation device provided by the present invention.

[0021] Figure 2 It is an axonometric diagram of the waste sulfuric acid nitrotoluene compound separation device provided by the present invention.

[0022] Figure 3 It is a top view of the waste sulfuric acid nitrotoluene compound separation device provided by the present invention.

[0023] Figure 4 yes Figure 3 AA section view.

[0024] Figure 5 It is a structural schematic diagram of the waste acid treatment tank provided by the present invention.

[0025] Figure 6 It is a front view of the waste acid treatment tank provided by the present invention.

[0026] Figure 7 yes Figure 6 BB section view.

[0027] Figure 8 It is a structural schematic diagram of the auxiliary separation mechanism provided by the present invention.

[0028] Fig. 9 It is a schematic diagram of the structure of the compound toggle assembly provided by the present invention.

[0029] Fig.10 It is a structural schematic diagram of the adjustable tower plate portion provided by the present invention.

[0030] Fig.11 It is a schematic structural diagram of the auxiliary separation unit provided by the present invention.

[0031] Fig.12 yes Fig.11 Schematic diagram of the locally enlarged structure of A in the middle.

[0032] Fig.13 It is a schematic structural diagram of the compound separator provided by the present invention.

[0033] Fig.14 It is a schematic diagram of the structure of the discrete components of the compound provided by the present invention.

[0034] Fig.15 It is a top view of the discrete components of the compound provided by the present invention.

[0035] Fig.16 yes Fig.15 CC section view.

[0036] In the figure: 1-device bracket, 11-tank bracket, 12-auxiliary bracket, 2-waste acid treatment tank, 21-treatment tank cover, 22-nitration recovery unit, 221-nitric acid recovery tank, 222-nitric acid suction pump, 223-nitric acid reflux pipe, 23-waste acid confluence pipe, 24-compound discharge pipe, 25-acid discharge seat, 3-compound separator, 31-negative pressure separation tank, 32-negative pressure exhaust pump, 33-compound discharge port, 4-device drive mechanism, 41-drive motor, 42-separation drive unit, 421-first rotor, 422-second rotor, 423-conveyor belt, 424-linked gear ring, 43-discrete drive unit, 431-second gear, 432-discrete drive shaft, 433-third gear, 434-fourth gear, 5-compound discrete assembly, 51-discrete positioning seat, 52-discrete adjustment seat, 53-discrete positioning slot, 54-discrete adjustment slot, 55- Discrete linkage block, 56-compound conduction pipe, 57-discrete sealing cover, 58-compound diversion pipe, 59-spiral discrete pipe, 6-auxiliary separation mechanism, 61-auxiliary separation part, 611-auxiliary hinge rod, 612-separation linkage seat, 613-driving pin, 614-swing release seat, 615-oblique tooth groove, 616-swing positioning seat, 617-release nozzle, 618-spiral guide pipe, 619-steam injection pipe, 62 -adjustable tower plate portion, 621-spiral heating tube, 622-driving cam, 623-swinging tower plate, 624-tower plate driving groove, 625-tower plate limiting groove, 626-tower plate limiting rod, 627-tower plate positioning seat, 628-material guide leakage hole, 63-upper spoiler paddle, 64-compound toggle assembly, 641-first gear, 642-reciprocating gear seat, 643-tooth seat guide rail, 644-reciprocating toggle seat, 65-separation linkage rod. DETAILED DESCRIPTION

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0038] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] When the existing device uses a liquid ring vacuum pump to press the nitro compound into the dispersion pipe, the dilute nitric acid mixed in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion pipe, and no countercurrent contact mechanism is set when the nitro compound is separated from the waste sulfuric acid, so that the waste sulfuric acid and the nitro compound cannot be effectively countercurrently contacted, affecting the separation and purification efficiency of the nitro compound. In view of the above problems, we propose a waste sulfuric acid nitrotoluene compound separation device. In short, the device consists of a device bracket 1, a waste acid treatment tank 2, a device driving mechanism 4, and an auxiliary separation mechanism 6. The device bracket 1 includes a tank bracket 11 and an auxiliary bracket 12, and a treatment tank cover plate 21 is provided on the top of the waste acid treatment tank 2, and an acid discharge seat 25 is provided at the bottom of the waste acid treatment tank 2. The treatment tank cover plate 21 is respectively provided with a waste acid manifold 23, a nitration recovery part 22, and a compound discharge pipe 24, and the auxiliary separation mechanism 6 includes a separation linkage rod 65, an adjustable tower plate part 62, and an auxiliary separation part 61. When the waste sulfuric acid is separated, the waste sulfuric acid after the reaction is first pumped into the waste acid treatment tank 2 through the waste acid manifold 23, and then the device driving mechanism 4, the auxiliary separation part 61, the nitration recovery part 22 and the adjustable tray part 62 are turned on. The auxiliary separation part 61 starts to pump hot steam into the waste acid treatment tank 2, so that the hot steam first heats and volatilizes the dilute nitric acid and water in the waste sulfuric acid. At the same time, the device driving mechanism 4 can drive the auxiliary separation part 61 to move, so that the pumped hot steam is evenly released, ensuring that the material in the waste acid treatment tank 2 is heated evenly. The device driving mechanism 4 can also synchronously drive the adjustable tray part 62 to move, assist in increasing the contact area between the mixture and the steam in the waste acid treatment tank 2, and slow down the rotation of the separation linkage rod 65. After the nitric acid and water are completely volatilized, the nitration recovery part 22 is closed, the compound discharge pipe 24 is opened, and the heating temperature of the hot steam and the adjustable tray part 62 is increased, so that the nitrotoluene compound in the waste sulfuric acid after the dilute nitric acid is separated is separated to the top of the waste acid treatment tank 2, and the separation of the waste sulfuric acid and the nitrotoluene compound is achieved. In the embodiment of the present invention, an auxiliary separation mechanism 6 and a device driving mechanism 4 are provided. The auxiliary separation mechanism 6 is composed of a separation linkage rod 65, an adjustable tower plate portion 62, and an auxiliary separation portion 61. The separation linkage rod 65 is driven by the device driving mechanism 4 and can synchronously drive the adjustable tower plate portion 62 and the auxiliary separation portion 61 to move. The adjustable tower plate portion 62 and the auxiliary separation portion 61 cooperate with each other to not only release the pumped hot steam evenly, ensuring that the material in the waste acid treatment tank 2 is heated evenly, but also increase the contact area between the mixture in the waste acid treatment tank 2 and the steam, and decelerate the rotation of the separation linkage rod 65. The setting of the adjustable tower plate portion 62 enables the waste sulfuric acid and the nitro compound to be effectively contacted in countercurrent, ensuring that the nitrotoluene compound in the waste sulfuric acid after the separation of dilute nitric acid is separated to the top of the waste acid treatment tank 2, thereby realizing the rapid separation of the waste sulfuric acid and the nitrotoluene compound.The invention overcomes the problem that when the existing device uses a liquid ring vacuum pump to press the nitro compound into the dispersion pipe, the dilute nitric acid mixed in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion pipe, and no countercurrent contact mechanism is set when the nitro compound is separated from the waste sulfuric acid, so that the waste sulfuric acid and the nitro compound cannot be effectively countercurrently contacted, which affects the separation and purification efficiency of the nitro compound.

[0040] It should be noted that the waste sulfuric acid in the embodiment of the present invention can be waste acid liquid generated during the synthesis and preparation of nitrotoluene compounds and intermediates, and the waste sulfuric acid contains water, sulfuric acid, dilute nitric acid, mononitrotoluene, dinitrotoluene, and trinitrotoluene.

[0041] The embodiment of the present invention provides a device for separating waste sulfuric acid and nitrotoluene compounds, such as Figure 1-Figure 4 As shown, the waste sulfuric acid nitrotoluene compound separation device comprises: A device support 1, wherein the device support 1 comprises a tank support 11 and an auxiliary support 12 fixedly connected to the tank support 11; In this embodiment, the tank bracket 11 and the auxiliary bracket 12 are fixedly connected by welding or riveting, and the tank bracket 11 can be installed on one side of the waste acid treatment pipe of the nitrotoluene compound preparation system.

[0042] Waste acid treatment tank 2, such as Figure 5-Figure 7 As shown, the waste acid treatment tank 2 is fixedly installed on the tank bracket 11, a treatment tank cover plate 21 is arranged on the top of the waste acid treatment tank 2, an acid discharge seat 25 is arranged on the bottom of the waste acid treatment tank 2, and a waste acid manifold 23, a nitration recovery part 22, and a compound discharge pipe 24 are respectively arranged on the treatment tank cover plate 21; It should be noted that the waste acid treatment tank 2 can be a conical tank structure that is wide at the top and narrow at the bottom. The outer wall of the waste acid treatment tank 2 is fixedly connected to the tank bracket 11 by welding or riveting, and the top of the waste acid treatment tank 2 is fixedly connected to the treatment tank cover 21 by snaps and bolts. The waste acid confluence tank is connected to the waste acid treatment pipe of the nitrotoluene compound preparation system by a sealing flange, and the compound discharge pipe 24 is fixedly installed on the side wall of the treatment tank cover 21 by riveting or snapping. An overflow trough is arranged on the top of the waste acid treatment tank 2. The setting of the overflow trough facilitates the recovery and treatment of the nitrotoluene compound separator.

[0043] The device driving mechanism 4 is arranged on the tank support 11, and the device driving mechanism 4 includes a driving motor 41, a separation driving part 42, and a discrete driving part 43. The driving motor 41 is connected to the separation driving part 42, and the separation driving part 42 is connected to the discrete driving part 43; In this embodiment, the driving motor 41 may be a forward and reverse servo motor, and the driving motor 41 is fixedly mounted on the tank support 11 by welding or clamping.

[0044] An auxiliary separation mechanism 6, the auxiliary separation mechanism 6 is arranged in the waste acid treatment tank 2, and the auxiliary separation mechanism 6 is used to assist in separating sulfuric acid, nitric acid, and nitrotoluene compounds; Among them, Figure 8 As shown, the auxiliary separation mechanism 6 includes: A separation linkage rod 65, wherein the separation linkage rod 65 is disposed in the waste acid treatment tank 2, and one end of the separation linkage rod 65 is connected to the separation drive unit 42; In this embodiment, the separation linkage rod 65 passes through the processing tank cover plate 21, and the separation linkage rod 65 is rotatably connected to the processing tank cover plate 21 by means of a bearing or a roller.

[0045] An adjustable tray portion 62, wherein the adjustable tray portion 62 is disposed in the waste acid treatment tank 2, and the adjustable tray portion 62 is used to increase the contact area between the mixture and the steam in the waste acid treatment tank 2, and to decelerate the rotation of the separation linkage rod 65; The auxiliary separation part 61 is arranged below the adjustable tower plate part 62. The auxiliary separation part 61 is connected to the separation linkage rod 65. The auxiliary separation part 61 is used to assist in separating nitric acid and nitrotoluene compounds in the waste sulfuric acid and to uniformly heat the waste sulfuric acid.

[0046] In this embodiment, when the waste sulfuric acid is separated, the reacted waste sulfuric acid is first pumped into the waste acid treatment tank 2 through the waste acid manifold 23, and then the device driving mechanism 4, the auxiliary separation part 61, the nitration recovery part 22 and the adjustable tray part 62 are turned on. The auxiliary separation part 61 starts to pump hot steam into the waste acid treatment tank 2, so that the hot steam first heats and volatilizes the dilute nitric acid and water in the waste sulfuric acid. At the same time, the device driving mechanism 4 can drive the auxiliary separation part 61 to move, so that the pumped hot steam is evenly released, ensuring that the material in the waste acid treatment tank 2 is heated evenly. The device driving mechanism 4 can also synchronously drive the adjustable tray part 62 to move, assist in increasing the contact area between the mixture and the steam in the waste acid treatment tank 2, and decelerate the rotation of the separation linkage rod 65. After the nitric acid and water are volatilized, the nitration recovery part 22 is closed, the compound discharge pipe 24 is opened, and the heating temperature of the hot steam and the adjustable tray part 62 is increased, so that the nitrotoluene compound in the waste sulfuric acid after the dilute nitric acid is separated is separated to the top of the waste acid treatment tank 2, and the waste sulfuric acid and the nitrotoluene compound are separated.

[0047] In the embodiment of the present invention, an auxiliary separation mechanism 6 and a device driving mechanism 4 are provided. The auxiliary separation mechanism 6 is composed of a separation linkage rod 65, an adjustable tower plate portion 62, and an auxiliary separation portion 61. The separation linkage rod 65 is driven by the device driving mechanism 4 and can synchronously drive the adjustable tower plate portion 62 and the auxiliary separation portion 61 to move. The adjustable tower plate portion 62 and the auxiliary separation portion 61 cooperate with each other to not only release the pumped hot steam evenly, ensuring that the material in the waste acid treatment tank 2 is heated evenly, but also increase the contact area between the mixture in the waste acid treatment tank 2 and the steam, and decelerate the rotation of the separation linkage rod 65. The setting of the adjustable tower plate portion 62 enables the waste sulfuric acid and the nitro compound to be effectively contacted in countercurrent, ensuring that the nitrotoluene compound in the waste sulfuric acid after the separation of dilute nitric acid is separated to the top of the waste acid treatment tank 2, thereby realizing the rapid separation of the waste sulfuric acid and the nitrotoluene compound. The invention overcomes the problem that when the existing device uses a liquid ring vacuum pump to press the nitro compound into the dispersion pipe, the dilute nitric acid mixed in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion pipe, and no countercurrent contact mechanism is set when the nitro compound is separated from the waste sulfuric acid, so that the waste sulfuric acid and the nitro compound cannot be effectively countercurrently contacted, which affects the separation and purification efficiency of the nitro compound.

[0048] In a further preferred embodiment of the present invention, Figure 1-Figure 2 As shown, the separation drive unit 42 includes: A first rotating wheel 421, wherein the first rotating wheel 421 is fixedly connected to an output end of the driving motor 41; A second rotating wheel 422 is rotatably mounted on the processing tank cover plate 21, wherein the first rotating wheel 421 and the second rotating wheel 422 are rotatably connected via a conveyor belt 423, and the lower portion of the second rotating wheel 422 is fixedly connected to the end of the separation linkage rod 65; The linkage ring gear 424 is fixedly mounted on the second rotating wheel 422 , and the linkage ring gear 424 is connected to the discrete driving part 43 .

[0049] In this embodiment, the first rotating wheel 421 is fixedly connected to the output end of the driving motor 41 by plugging or riveting, and the second rotating wheel 422 is rotatably connected to the processing tank cover 21 by bearings or rollers, and the lower wall of the second rotating wheel 422 is fixedly connected to the end of the separation linkage rod 65 by welding or clamping, and the linkage gear ring 424 is fixedly arranged on the upper surface of the second rotating wheel 422 by welding or mortise and tenoning.

[0050] In a further preferred embodiment of the present invention, Figure 8 As shown, the auxiliary separation mechanism 6 also includes: At least one set of upper spoiler paddles 63, wherein the upper spoiler paddles 63 are fixedly mounted on the separation linkage rod 65, and the upper spoiler paddles 63 are used to spoil the nitrotoluene compound in the waste acid treatment tank 2, and assist the nitrotoluene compound to flow into the compound discharge pipe 24; It should be noted that the upper spoiler paddles 63 are all arranged on the outer wall of the separation linkage rod 65 in a counterclockwise circumferential direction, and the upper spoiler paddles 63 can be in the shape of an arc plate, a rectangular plate, or a spiral plate structure, and the number of the upper spoiler paddles 63 is 3-8 groups.

[0051] The compound shifting assembly 64 is arranged in the treatment tank cover plate 21 and is connected to the separation linkage rod 65. The compound shifting assembly 64 is used to shift the nitrotoluene compound at the center of the waste acid treatment tank 2 to the edge.

[0052] In the embodiment of the present invention, an upper spoiler paddle 63 and a compound moving assembly 64 are provided which cooperate with each other. The upper spoiler paddle 63 and the compound moving assembly 64 cooperate with each other to move the nitrotoluene compound after heating and negative pressure separation to the top position of the inner cavity of the waste acid treatment tank 2, thereby facilitating the flow of the nitrotoluene compound into the compound discharge pipe 24, reducing the difficulty of separating the waste sulfuric acid and improving the separation efficiency.

[0053] In a further preferred embodiment of the present invention, Fig. 9 As shown, the compound dial assembly 64 includes: A first gear 641, wherein the first gear 641 is fixedly sleeved on the separation linkage rod 65; A reciprocating tooth seat 642, wherein the reciprocating tooth seat 642 is sleeved on the outside of the first gear 641, and the inner wall of the reciprocating tooth seat 642 is meshed with the first gear 641 for transmission; At least one set of reciprocating toggle seats 644, wherein the reciprocating toggle seats 644 are fixedly mounted on both sides of the reciprocating tooth seat 642, and the reciprocating toggle seats 644 are used to toggle the nitrotoluene compound to the edge; The gear seat guide rail 643 is fixedly embedded in the processing tank cover plate 21, and the reciprocating gear seat 642 is slidably installed in the gear seat guide rail 643.

[0054] In this embodiment, the first gear 641 is fixedly mounted on the outer wall of the separation linkage rod 65 by riveting or mortise and tenoning. The first gear 641 can be an incomplete gear of half, one third or one quarter, and two sets of horizontal racks are symmetrically arranged in the reciprocating tooth seat 642, which are respectively meshed with the first gear 641 for transmission. The tooth seat guide rail 643 is fixedly mounted on the treatment tank cover plate 21 by welding or riveting. The reciprocating toggle seat 644 can be made of corrosion-resistant alloy or quartz material. The shape of the reciprocating toggle seat 644 can be rectangular, arc-shaped or an arc-shaped plate structure. The reciprocating toggle seat 644 is fixedly connected to the reciprocating tooth seat 642 by clamping or riveting.

[0055] After the nitrotoluene compounds are separated, the driving motor 41 can drive the first rotor 421, the second rotor 422, and the linkage gear ring 424 to rotate, so that the second rotor 422 drives the separation linkage rod 65 to rotate, and the separation linkage rod 65 drives the upper spoiler paddle 63 to rotate forward and reverse, so that the upper spoiler paddle 63 generates centrifugal force to act on the floating nitrotoluene compounds, so that the nitrotoluene compounds diffuse to the edge, and the rotation of the separation linkage rod 65 can also drive the first gear 641 to rotate, so that the first gear 641 reciprocates to drive the reciprocating gear seat 642 and the reciprocating shifting seat 644 to move back and forth, further shifting the nitrotoluene compounds to the edge area, thereby facilitating the recovery efficiency of the nitrotoluene compounds.

[0056] In a further preferred embodiment of the present invention, Fig.10 As shown, the adjustable tray portion 62 includes: A spiral heating tube 621, wherein the spiral heating tube 621 is fixedly embedded in the inner wall of the waste acid treatment tank 2, and the spiral heating tube 621 is used to heat the waste acid treatment tank 2; The spiral heating tube 621 has a spiral resistance wire or an electric heating rod built in. The setting of the spiral heating tube 621 can cooperate with hot steam to quickly heat the material in the waste acid treatment tank 2, avoiding the phenomenon of side reactions or incomplete separation caused by too long heating time. At the same time, the spiral heating tube 621 can also cooperate with multiple groups of swing tower plates 623 to improve the medium transfer efficiency of the swing tower plates 623.

[0057] At least one set of swinging tower plates 623, the swinging tower plates 623 are movably arranged in the waste acid treatment tank 2, a tower plate driving groove 624 is opened at the center of the swinging tower plates 623, and at least one set of tower plate limiting grooves 625 are opened at the edge of the swinging tower plates 623; It should be noted that the number of the swinging tower plates 623 can be 2-8 groups, and the swinging tower plates 623 can be circular plates or round seats with hollow interiors. The swinging tower plates 623 are made of corrosion-resistant alloy or quartz material. The shape of the tower plate driving grooves 624 can be circular, square or elliptical. The tower plate limiting grooves 625 can be arc grooves. The tower plate limiting grooves 625 are circumferentially arranged at the edges of the swinging tower plates 623.

[0058] At least one group of material guiding holes 628, wherein the material guiding holes 628 are provided in the swinging plate 623, and the material guiding holes 628 are used to guide the mixture and the steam in the waste acid treatment tank 2, and to help increase the contact area between the mixture and the steam; In this embodiment, the material guide leakage holes 628 can be a diamond-shaped, arc-shaped, or circular groove structure, and the material guide leakage holes 628 are circumferentially arranged in the swing tower plate 623. The arrangement of the material guide leakage holes 628 can enable the steam to fully contact the material when the hot steam is released, which helps the nitro compounds to form fine droplets or films, increases the surface area for phase mass transfer, thereby improving the mass transfer rate and ensuring the separation efficiency of waste sulfuric acid and nitrotoluene compounds.

[0059] A driving cam 622 is fixedly sleeved on the outer wall of the separation linkage rod 65, and the driving cam 622 is movably embedded in the tower plate driving groove 624. The driving cam 622 is fixedly sleeved on the outer wall of the separation linkage rod 65 by means of plugging or mortise and tenon; At least one set of tower plate limiting rods 626 are fixedly mounted on the inner wall of the waste acid treatment tank 2 , the tower plate limiting rods 626 are slidably connected to the tower plate limiting grooves 625 , and tower plate positioning seats 627 are fixedly mounted on the upper and lower sides of the tower plate limiting rods 626 .

[0060] In this embodiment, the tower plate limiting rods 626 are circumferentially arranged on the inner wall of the waste acid treatment tank 2. The arrangement of the tower plate limiting rods 626 realizes the support and limitation of the swinging tower plate 623, thereby preventing the swinging tower plate 623 from falling off.

[0061] In the embodiment of the present invention, an adjustable plate portion 62 is provided, and the adjustable plate portion 62 is composed of a swinging plate 623, a material guide hole 628, and a driving cam 622. The swinging plate 623 can be driven by the driving cam 622, so as to move in the waste acid treatment tank 2 in a circumferential swinging manner, which, on the one hand, enables the waste sulfuric acid and the nitro compound to be effectively in countercurrent contact, and also avoids the adsorption of nitrotoluene compounds on their surfaces. The setting of the material guide hole 628 enables the steam to fully contact the material when the hot steam is released, which helps the nitro compound to form fine droplets or films, increases the surface area for phase mass transfer, thereby improving the mass transfer rate, and ensuring the separation efficiency of the waste sulfuric acid and nitrotoluene compounds. On the other hand, the setting of the swinging plate 623 can perform multi-stage deceleration processing on the separation linkage rod 65, thereby avoiding the risk of splashing and overheating caused by violent stirring of the waste sulfuric acid.

[0062] In a further preferred embodiment of the present invention, Figure 11-Figure 12 As shown, the auxiliary separation unit 61 includes: At least one set of auxiliary hinged rods 611, wherein the auxiliary hinged rods 611 are hingedly mounted on the lower end of the separation linkage rod 65, the number of the auxiliary hinged rods 611 is 1-4 sets, and the auxiliary hinged rods 611 are inclined; Rotate a separation linkage seat 612 disposed at the bottom of the inner cavity of the waste acid treatment tank 2, wherein at least one set of driving pins 613 is fixedly mounted on the separation linkage seat 612; The separation linkage seat 612 is rotatably connected to the inner cavity of the waste acid treatment tank 2 by a bearing or a roller frame, and the driving pin shaft 613 is circumferentially arranged on the separation linkage seat 612. The separation linkage seat 612 is fixedly connected to the lower end of the auxiliary hinge rod 611 by snapping or plugging.

[0063] At least one set of swing release seats 614, the swing release seats 614 are rotatably sleeved on the separation linkage seat 612, at least one set of beveled tooth grooves 615 are provided in the swing release seats 614, and the beveled tooth grooves 615 are meshed and transmitted with the driving pin shaft 613; It should be noted that the swing release seat 614 can be a round seat or a circular ring with a hollow interior, and the number of the swing release seats 614 is 3-6 groups, and the swing release seat 614 is rotatably connected to the swing positioning seat 616 through a bearing.

[0064] A swing positioning seat 616, which is rotatably connected to the swing release seat 614, and is used to support and guide the swing release seat 614, and the swing positioning seat 616 is fixedly connected to the inner wall of the waste acid treatment tank 2; A release nozzle 617, wherein the release nozzle 617 is fixedly installed in the swing positioning seat 616, and one side of the release nozzle 617 is connected to the spiral guide tube 618 through a telescopic tube, and the spiral guide tube 618 is fixedly arranged in the waste acid treatment tank 2; The steam injection pipe 619 is fixedly installed at the bottom of the waste acid treatment tank 2 , and one end of the steam injection pipe 619 is connected to the spiral guide pipe 618 .

[0065] In this embodiment, one end of the steam injection pipe 619 is connected to a steam generating source, and the steam injection pipe 619 is fixedly installed at the bottom of the waste acid treatment tank 2 by means of a clip or a flange. A plurality of groups of spiral guide pipes 618 are circumferentially arranged on the top of the steam injection pipe 619. The arrangement of the spiral guide pipe 618 can, on the one hand, deliver hot steam into the release nozzle 617, and on the other hand, the spiral structure can ensure uniform heating of the material, thereby improving the heating efficiency of the material.

[0066] In the embodiment of the present invention, an auxiliary separation part 61 is provided, and the auxiliary separation part 61 is composed of a separation linkage seat 612, a swing release seat 614, a release nozzle 617, and a spiral guide tube 618. The separation linkage seat 612, the swing release seat 614, the release nozzle 617, and the spiral guide tube 618 cooperate to ensure that the steam is evenly released through the release nozzle 617, and the release angle of the steam nozzle can be adjusted by the separation linkage rod 65, thereby ensuring the rapid and efficient separation and volatilization of the dilute nitric acid in the waste sulfuric acid, and reducing the difficulty of separating the waste sulfuric acid and nitrotoluene compounds.

[0067] The forward and reverse rotation of the separation linkage rod 65 after deceleration by the adjustable tower plate part 62 can drive the auxiliary hinged rod 611 to swing, so that the auxiliary hinged rod 611 drives the separation linkage seat 612 and the driving pin shaft 613 to forward and reverse, and then the driving pin shaft 613 drives the bevel tooth groove 615 to move, and the bevel tooth groove 615 drives the swinging release seat 614 and the release nozzle 617 to swing, thereby improving the heating efficiency of the dilute nitric acid in the waste acid treatment tank 2 and ensuring the rapid separation of the dilute nitric acid.

[0068] In a further preferred embodiment of the present invention, Fig.13 As shown, the embodiment of the present invention further includes a compound separator 3, which is fixedly mounted on the auxiliary bracket 12. The compound separator 3 is used to assist in separating nitro compounds and nitrogen oxide gas. The compound separator 3 includes: A negative pressure separation tank 31, wherein the negative pressure separation tank 31 is fixedly mounted on the auxiliary bracket 12; A negative pressure exhaust pump 32 is arranged on one side of the negative pressure separation tank 31, and the negative pressure exhaust pump 32 is used to extract and recover the nitrogen oxide gas; The compound discharge port 33 is disposed at the bottom of the negative pressure separation tank 31 and is used to discharge the separated nitro compounds.

[0069] It should be noted that the negative pressure separation tank 31 can be a rectangular tank or a circular tank structure with a hollow interior. The negative pressure exhaust pump 32 is fixedly installed on the top of the side wall of the negative pressure separation tank 31 by snapping or welding, and the negative pressure separation tank 31 is fixedly connected to the auxiliary bracket 12 by snapping or fastening bolts.

[0070] The compound discrete component 5 is arranged on one side of the negative pressure separation tank 31, the compound discrete component 5 is connected to the compound discharge pipe 24, and the compound discrete component 5 is also connected to the discrete drive unit 43. The compound discrete component 5 is used for discrete processing of nitrotoluene compounds and assists in separating nitrotoluene compounds and nitrogen oxide gas.

[0071] In the embodiment of the present invention, a compound discrete component 5 is provided, which can fully discrete the separated nitrotoluene compound droplet film, thereby ensuring the efficient separation and release of the nitric oxide gas and avoiding the interference of the nitrotoluene compound droplet film with the purification.

[0072] In a further preferred embodiment of the present invention, Figure 14-16 As shown, the discrete driving unit 43 includes: A second gear 431, wherein the second gear 431 is disposed above the linkage gear ring 424, and the second gear 431 is meshed with the linkage gear ring 424 for transmission; A discrete drive shaft 432, wherein the discrete drive shaft 432 is rotatably disposed on the treatment tank cover plate 21, one end of the discrete drive shaft 432 is fixedly connected to the second gear 431, and the other end of the discrete drive shaft 432 is fixedly connected to the third gear 433; The fourth gear 434 is disposed below the third gear 433 , and the fourth gear 434 is meshed with the third gear 433 for transmission. The fourth gear 434 is connected to the compound discrete component 5 .

[0073] In this embodiment, the second gear 431 is welded or riveted to one end of the discrete drive shaft 432, and the discrete drive shaft 432 is rotatably connected to the upper surface of the processing tank cover 21 by means of a bearing or a roller. The other end of the discrete drive shaft 432 is welded or riveted to the third gear 433, and the third gear 433 and the fourth gear 434 are rotatably connected to the auxiliary bracket 12 by means of bearings or rollers.

[0074] In a further preferred embodiment of the present invention, Figure 14-16 As shown, the compound discrete component 5 includes: A discrete positioning seat 51, wherein the discrete positioning seat 51 is fixedly mounted on the inner wall of the negative pressure separation tank 31, and at least one group of discrete positioning grooves 53 is formed in the discrete positioning seat 51; A discrete adjustment seat 52, wherein the discrete adjustment seat 52 is disposed on one side of the discrete positioning seat 51, and at least one group of discrete adjustment slots 54 is formed in the discrete adjustment seat 52; It should be noted that the discrete positioning seat 51 is fixedly installed on the inner wall of the negative pressure separation tank 31 by means of snaps or bolts. The discrete positioning seat 51 and the discrete adjustment seat 52 can be round seats or round plates. The discrete positioning grooves 53 and the discrete adjustment grooves 54 are circumferentially arranged in the discrete positioning seat 51 and the discrete adjustment seat 52 respectively. The discrete positioning groove 53 is a rectangular groove, and the discrete adjustment groove 54 is an arc groove structure, and the number of discrete positioning grooves 53 and discrete adjustment grooves 54 can be 3-8 groups.

[0075] A spiral discrete tube 59, wherein the spiral discrete tube 59 is fixedly installed in the fourth gear 434, one end of the spiral discrete tube 59 is rotatably connected to the compound discharge tube 24, and the other end of the spiral discrete tube 59 is fixedly connected to the discrete adjustment seat 52; In this embodiment, the spiral discrete tube 59 is hollow inside, and the outer wall of the spiral discrete tube 59 is fixedly connected to the center position of the fourth gear 434 by plugging or riveting. One end of the spiral discrete tube 59 is rotatably connected to the compound discharge pipe 24 through a bearing, and the other end of the spiral discrete tube 59 is fixedly connected to the discrete adjustment seat 52 by plugging or riveting. A spiral groove or a spiral plate structure is arranged inside the spiral discrete tube 59. The arrangement of the spiral discrete tube 59 further realizes the discrete processing of the nitrotoluene compound.

[0076] A discrete sealing cover 57, which is disposed on one side of the discrete adjustment seat 52, and is used to seal the spiral discrete tube 59, and the discrete sealing cover 57 is rotatably connected to the spiral discrete tube 59; A discrete linkage block 55, wherein the discrete linkage block 55 is disposed in the discrete adjustment slot 54, and the discrete linkage block 55 is also slidably connected to the discrete positioning slot 53; The compound conducting pipe 56 is fixedly connected to the discrete linkage block 55 , and the compound conducting pipe 56 is slidably connected to the side wall of the discrete sealing cover 57 . A compound shunt pipe 58 is detachably mounted on the end of the compound conducting pipe 56 .

[0077] In this embodiment, the discrete sealing cover 57 is rotatably connected to the end wall of the spiral discrete tube 59 through a bearing or a sealing flange, and the discrete linkage block 55 can be a cylindrical block or a spherical block. The discrete linkage block 55 is fixedly connected to the compound conducting tube 56 by means of snaps or bolts, and the compound diversion tube 58 is installed in the compound conducting tube 56 by means of snaps or threads.

[0078] After the separation of the dilute nitric acid is completed, the negative pressure exhaust pump 32 is turned on, and the negative pressure separation tank 31 forms a negative pressure environment. When the nitrotoluene compound is guided into the spiral discrete tube 59 through the compound discharge pipe 24, the linkage gear ring 424 rotates to drive the second gear 431, the discrete drive shaft 432, the third gear 433, and the fourth gear 434 to rotate, so that the fourth gear 434 drives the spiral discrete tube 59 to further discretely process the nitrotoluene compound. At the same time, the rotation of the fourth gear 434 can drive the discrete adjustment seat 52 and the discrete adjustment groove 54 to rotate, so that the discrete adjustment groove 54 drives the discrete drive block and the compound conducting tube 56 to move synchronously, so that the discrete nitrotoluene compound is further dispersed and separated by the compound conducting tube 56, so that the nitrogen oxide is fully dispersed, and the dropletized nitrotoluene compound is further purified.

[0079] In a further preferred embodiment of the present invention, Figure 1-Figure 2 As shown, the nitrification recovery unit 22 includes: A nitric acid reflux pipe 223, wherein the nitric acid reflux pipe 223 is fixedly mounted on the treatment tank cover plate 21; a nitric acid pump 222 connected to a nitric acid reflux pipe 223, and A nitric acid recovery tank 221 is fixedly mounted on the tank support 11 , and the nitric acid recovery tank 221 is connected to a nitric acid suction pump 222 .

[0080] In this embodiment, the nitric acid reflux pipe 223 is fixedly mounted on the treatment tank cover 21 by means of a snap or thread, and the nitric acid recovery tank 221 is fixedly mounted on the tank bracket 11 by means of a snap or fastening bolts.

[0081] In summary, the present invention provides a waste sulfuric acid nitrotoluene compound separation device. When separating waste sulfuric acid, the waste sulfuric acid after the reaction is first pumped into the waste acid treatment tank 2 through the waste acid manifold 23, and then the device driving mechanism 4, the auxiliary separation part 61, the nitration recovery part 22 and the adjustable tower plate part 62 are turned on. The auxiliary separation part 61 starts to pump hot steam into the waste acid treatment tank 2, so that the hot steam first heats and volatilizes the dilute nitric acid and water in the waste sulfuric acid. At the same time, the device driving mechanism 4 can drive the auxiliary separation part 61 to move, so that the pumped hot steam is evenly released. , ensuring that the materials in the waste acid treatment tank 2 are heated evenly, the device driving mechanism 4 can also synchronously drive the adjustable tray portion 62 to move, assist in increasing the contact area between the mixture and the steam in the waste acid treatment tank 2, and decelerate the rotation of the separation linkage rod 65. After the nitric acid and water are evaporated, the nitration recovery portion 22 is closed, the compound discharge pipe 24 is opened, and the heating temperature of the hot steam and the adjustable tray portion 62 is increased, so that the nitrotoluene compound in the waste sulfuric acid after the separation of the dilute nitric acid is separated to the top of the waste acid treatment tank 2, thereby realizing the separation of the waste sulfuric acid and the nitrotoluene compound.

[0082] In the embodiment of the present invention, an auxiliary separation mechanism 6 and a device driving mechanism 4 are provided. The auxiliary separation mechanism 6 is composed of a separation linkage rod 65, an adjustable tower plate portion 62, and an auxiliary separation portion 61. The separation linkage rod 65 is driven by the device driving mechanism 4 and can synchronously drive the adjustable tower plate portion 62 and the auxiliary separation portion 61 to move. The adjustable tower plate portion 62 and the auxiliary separation portion 61 cooperate with each other to not only release the pumped hot steam evenly, ensuring that the material in the waste acid treatment tank 2 is heated evenly, but also increase the contact area between the mixture in the waste acid treatment tank 2 and the steam, and decelerate the rotation of the separation linkage rod 65. The setting of the adjustable tower plate portion 62 enables the waste sulfuric acid and the nitro compound to be effectively contacted in countercurrent, ensuring that the nitrotoluene compound in the waste sulfuric acid after the separation of dilute nitric acid is separated to the top of the waste acid treatment tank 2, thereby realizing the rapid separation of the waste sulfuric acid and the nitrotoluene compound. The invention overcomes the problem that when the existing device uses a liquid ring vacuum pump to press the nitro compound into the dispersion pipe, the dilute nitric acid mixed in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion pipe, and no countercurrent contact mechanism is set when the nitro compound is separated from the waste sulfuric acid, so that the waste sulfuric acid and the nitro compound cannot be effectively countercurrently contacted, which affects the separation and purification efficiency of the nitro compound.

[0083] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0084] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A waste sulfuric acid nitrotoluene compound separation device, characterized in that: The waste sulfuric acid nitrotoluene compound separation device comprises: A device support (1), the device support (1) comprising a tank support (11) and an auxiliary support (12) fixedly connected to the tank support (11); A waste acid treatment tank (2), the waste acid treatment tank (2) being fixedly mounted on the tank support (11), a treatment tank cover plate (21) being arranged on the top of the waste acid treatment tank (2), an acid discharge seat (25) being arranged on the bottom of the waste acid treatment tank (2), and a waste acid manifold (23), a nitration recovery section (22), and a compound discharge pipe (24) being arranged on the treatment tank cover plate (21); A device drive mechanism (4), the device drive mechanism (4) being arranged on the tank support (11), the device drive mechanism (4) comprising a drive motor (41), a separation drive unit (42), and a discrete drive unit (43), the drive motor (41) being connected to the separation drive unit (42), and the separation drive unit (42) being connected to the discrete drive unit (43); An auxiliary separation mechanism (6), the auxiliary separation mechanism (6) being arranged in the waste acid treatment tank (2), and the auxiliary separation mechanism (6) being used for assisting in the separation of sulfuric acid, nitric acid, and nitrotoluene compounds; Wherein, the auxiliary separation mechanism (6) comprises: A separation linkage rod (65), wherein the separation linkage rod (65) is disposed in the waste acid treatment tank (2), and one end of the separation linkage rod (65) is connected to the separation drive unit (42); An adjustable tray portion (62), the adjustable tray portion (62) being arranged in the waste acid treatment tank (2), the adjustable tray portion (62) being used to increase the contact area between the mixture and the steam in the waste acid treatment tank (2), and to provide a deceleration protection for the rotation of the separation linkage rod (65); The auxiliary separation section (61) is arranged below the adjustable tray section (62), the auxiliary separation section (61) is connected to the separation linkage rod (65), and the auxiliary separation section (61) is used to assist in separating nitric acid and nitrotoluene compounds from the waste sulfuric acid and to uniformly heat the waste sulfuric acid.

2. The waste sulfuric acid nitrotoluene compound separation device as claimed in claim 1, characterized in that: The separation drive unit (42) comprises: A first rotating wheel (421), the first rotating wheel (421) being fixedly connected to an output end of a driving motor (41); A second rotating wheel (422) is rotatably mounted above the treatment tank cover plate (21), wherein the first rotating wheel (421) and the second rotating wheel (422) are rotatably connected via a conveyor belt (423), and the lower portion of the second rotating wheel (422) is fixedly connected to the end of a separation linkage rod (65); A linkage gear ring (424), wherein the linkage gear ring (424) is fixedly mounted on the second rotating wheel (422), and the linkage gear ring (424) is connected to the discrete driving part (43).

3. The waste sulfuric acid nitrotoluene compound separation device as claimed in claim 1, characterized in that: The auxiliary separation mechanism (6) further comprises: at least one set of upper spoiler paddles (63), the upper spoiler paddles (63) being fixedly mounted on the separation linkage rod (65), the upper spoiler paddles (63) being used to spoil the nitrotoluene compound in the waste acid treatment tank (2) and assist the nitrotoluene compound to flow into the compound discharge pipe (24); A compound shifting assembly (64) is disposed in the treatment tank cover plate (21), the compound shifting assembly (64) is connected to a separation linkage rod (65), and the compound shifting assembly (64) is used to shift the nitrotoluene compound at the center of the waste acid treatment tank (2) to the edge.

4. The waste sulfuric acid nitrotoluene compound separation device as claimed in claim 3, characterized in that: The compound dialing assembly (64) comprises: a first gear (641), the first gear (641) being fixedly sleeved on the separation linkage rod (65); A reciprocating tooth seat (642), the reciprocating tooth seat (642) being sleeved on the outside of the first gear (641), and the inner wall of the reciprocating tooth seat (642) meshingly transmits with the first gear (641); At least one set of reciprocating toggle seats (644), the reciprocating toggle seats (644) being fixedly mounted on both sides of the reciprocating tooth seat (642), the reciprocating toggle seats (644) being used to toggle the nitrotoluene compound to the edge; A tooth seat guide rail (643) is fixedly embedded in the processing tank cover plate (21), and the reciprocating tooth seat (642) is slidably installed in the tooth seat guide rail (643).

5. The waste sulfuric acid nitrotoluene compound separation device as claimed in claim 3, characterized in that: The adjustable tray portion (62) comprises: a spiral heating tube (621), the spiral heating tube (621) being fixedly embedded in the inner wall of the waste acid treatment tank (2), and the spiral heating tube (621) being used to heat the waste acid treatment tank (2); At least one set of swinging tower plates (623), wherein the swinging tower plates (623) are movably arranged in the waste acid treatment tank (2), a tower plate driving groove (624) is provided at the center of the swinging tower plates (623), and at least one set of tower plate limiting grooves (625) is provided at the edge of the swinging tower plates (623); at least one group of material guiding leaking holes (628), wherein the material guiding leaking holes (628) are provided in the swinging tower plate (623), and the material guiding leaking holes (628) are used to guide the mixture and steam in the waste acid treatment tank (2) and to assist in increasing the contact area between the mixture and the steam; A driving cam (622) is fixedly sleeved on the outer wall of the separation linkage rod (65), and the driving cam (622) is movably embedded in the tower plate driving groove (624); At least one set of tower plate limiting rods (626), wherein the tower plate limiting rods (626) are fixedly mounted on the inner wall of the waste acid treatment tank (2), the tower plate limiting rods (626) are slidably connected to the tower plate limiting grooves (625), and tower plate positioning seats (627) are fixedly mounted on the upper and lower sides of the tower plate limiting rods (626), respectively.

6. The waste sulfuric acid nitrotoluene compound separation device as claimed in claim 5, characterized in that: The auxiliary separation unit (61) comprises: At least one set of auxiliary hinged rods (611), wherein the auxiliary hinged rods (611) are hingedly mounted on the lower end of the separation linkage rod (65); Rotating a separation linkage seat (612) disposed at the bottom of the inner cavity of the waste acid treatment tank (2), wherein at least one set of driving pins (613) is fixedly mounted on the separation linkage seat (612); At least one set of swing release seats (614), the swing release seats (614) being rotatably sleeved on the separation linkage seat (612), at least one set of beveled tooth grooves (615) being provided in the swing release seats (614), and meshing transmission between the beveled tooth grooves (615) and the driving pin shaft (613); A swing positioning seat (616), the swing positioning seat (616) being rotatably connected to the swing releasing seat (614), the swing positioning seat (616) being used to support and guide the swing releasing seat (614) to limit the position, and the swing positioning seat (616) being fixedly connected to the inner wall of the waste acid treatment tank (2); A release nozzle (617), wherein the release nozzle (617) is fixedly mounted in the swing positioning seat (616), one side of the release nozzle (617) is connected to the spiral guide tube (618) via a telescopic tube, and the spiral guide tube (618) is fixedly arranged in the waste acid treatment tank (2); A steam injection pipe (619) is fixedly installed at the bottom of the waste acid treatment tank (2), and one end of the steam injection pipe (619) is connected to the spiral guide pipe (618).

7. The waste sulfuric acid nitrotoluene compound separation device as claimed in claim 2, characterized in that: The invention also comprises a compound separator (3), wherein the compound separator (3) is fixedly mounted on the auxiliary support (12), and the compound separator (3) is used for assisting in the separation of nitro compounds and nitrogen oxide gas. The compound separator (3) comprises: A negative pressure separation tank (31), wherein the negative pressure separation tank (31) is fixedly mounted on the auxiliary bracket (12); a negative pressure exhaust pump (32) disposed on one side of the negative pressure separation tank (31), the negative pressure exhaust pump (32) being used to extract and recover the nitrogen oxide gas; A compound discharge port (33), wherein the compound discharge port (33) is disposed at the bottom of the negative pressure separation tank (31), and the compound discharge port (33) is used to discharge the separated nitro compound; The compound discrete component (5) is arranged on one side of the negative pressure separation tank (31), the compound discrete component (5) is connected to the compound discharge pipe (24), and the compound discrete component (5) is also connected to the discrete drive unit (43). The compound discrete component (5) is used for discrete processing of nitrotoluene compounds and assisting in the separation of nitrotoluene compounds and nitrogen oxide gas.

8. The waste sulfuric acid-nitrotoluene compound separation device as claimed in claim 7, characterized in that: The discrete drive unit (43) comprises: A second gear (431), the second gear (431) being arranged above the linkage gear ring (424), and the second gear (431) and the linkage gear ring (424) being meshed and transmitted; A discrete drive shaft (432), the discrete drive shaft (432) being rotatably disposed on the treatment tank cover plate (21), one end of the discrete drive shaft (432) being fixedly connected to the second gear (431), and the other end of the discrete drive shaft (432) being fixedly connected to the third gear (433); A fourth gear (434) is arranged below the third gear (433), the fourth gear (434) and the third gear (433) are meshed and transmitted with each other, and the fourth gear (434) is connected to the compound discrete component (5).

9. The waste sulfuric acid-nitrotoluene compound separation device as claimed in claim 8, characterized in that: The compound discrete components (5) include: A discrete positioning seat (51), the discrete positioning seat (51) being fixedly mounted on the inner wall of the negative pressure separation tank (31), and at least one group of discrete positioning grooves (53) being provided in the discrete positioning seat (51); A discrete adjustment seat (52), wherein the discrete adjustment seat (52) is arranged on one side of the discrete positioning seat (51), and at least one group of discrete adjustment slots (54) is provided in the discrete adjustment seat (52); A spiral discrete tube (59), wherein the spiral discrete tube (59) is fixedly installed in the fourth gear (434), one end of the spiral discrete tube (59) is rotatably connected to the compound discharge tube (24), and the other end of the spiral discrete tube (59) is fixedly connected to a discrete adjustment seat (52); A discrete sealing cover (57), the discrete sealing cover (57) being arranged on one side of the discrete adjustment seat (52), the discrete sealing cover (57) being used to seal the spiral discrete tube (59), and the discrete sealing cover (57) and the spiral discrete tube (59) being rotatably connected; A discrete linkage block (55), wherein the discrete linkage block (55) is disposed in the discrete adjustment slot (54), and the discrete linkage block (55) is also slidably connected to the discrete positioning slot (53); A compound conducting pipe (56) is fixedly connected to the discrete linkage block (55), wherein the compound conducting pipe (56) is slidably connected to the side wall of the discrete sealing cover (57), and a compound diversion pipe (58) is detachably mounted on the end of the compound conducting pipe (56).

10. The device for separating waste sulfuric acid and nitrotoluene compounds according to any one of claims 2 to 5, characterized in that: The nitrification recovery unit (22) comprises: A nitric acid reflux pipe (223), wherein the nitric acid reflux pipe (223) is fixedly mounted on the treatment tank cover plate (21); a nitric acid pump (222) connected to the nitric acid reflux pipe (223), and A nitric acid recovery tank (221) is fixedly mounted on the tank support (11), and the nitric acid recovery tank (221) is connected to a nitric acid suction pump (222).

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