A waste sulfuric acid and nitrotoluene compound separation device

Abstract

The present invention discloses a waste sulfuric acid nitro toluene compound separation device, which solves the problems that when the existing device uses a liquid ring vacuum pump to press the nitro compound into the dispersion tube, the dilute nitric acid doped in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion tube, and there is no countercurrent contact mechanism when the nitro compound is separated from the waste sulfuric acid, affecting the separation and purification efficiency of the nitro compound. The device includes a device support, a waste acid treatment tank, a device driving mechanism, and an auxiliary separation mechanism. The device support includes a tank support and an auxiliary support. The auxiliary separation mechanism includes a separation linkage rod, an adjustable tray section, and an auxiliary separation section. In 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 section, and an auxiliary separation section. The setting of the adjustable tray section enables the waste sulfuric acid and the nitro compound to have effective countercurrent contact, realizing the rapid separation of the waste sulfuric acid and the nitro toluene compound.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste acid recovery, and particularly relates to a separation device for waste sulfuric acid and nitrotoluene compounds. Background Art

[0002] Nitrotoluene is an important organic compound, widely used in fields such as dyes, pharmaceuticals, and pesticides. Common nitrotoluene compounds include o-nitrotoluene, m-nitrotoluene, and trinitrotoluene. During the synthesis and preparation of nitrotoluene compounds, concentrated sulfuric acid acts as a catalyst, promoting the nitration reaction between toluene and nitric acid. At the same time, sulfuric acid can also act as a water absorbent to improve the reaction conversion rate and provide an acidic medium conducive to the formation of nitronium cations. These effects together ensure the smooth progress of the nitrotoluene synthesis reaction and the achievement of high yields. After the preparation of nitrotoluene compounds, it is necessary to recover and treat the waste sulfuric acid in the reaction system to avoid polluting the environment by directly discharging the waste sulfuric acid.

[0003] Chinese Patent CN110170185B discloses a device and method for separating waste sulfuric acid and nitro compounds. The device includes a waste acid tank. The upper left part of the waste acid tank is connected to a waste acid / nitro compound feed pipe. The upper right part of the waste acid tank is connected to a dispersion pipe on a separator through a nitro compound pipeline. The top of the separator is connected to a liquid ring vacuum pump through an exhaust pipe. A reflux valve is connected between the inlet and outlet pipelines of the liquid ring vacuum pump. The left side of the separator is connected to a mononitrotoluene discharge pipe 1, a transfer tank, and a mononitrotoluene discharge pipe 2 in sequence, and then connected to a mononitrotoluene pump. The output of the mononitrotoluene pump is connected to a DNT tank. A sight glass is provided on the right side of the separator, and the bottom of the separator is connected to a 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 doped in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion pipe, and a countercurrent contact mechanism is not provided when the nitro compound is separated from the waste sulfuric acid, resulting in the inability of the waste sulfuric acid and the nitro compound to effectively carry out countercurrent contact and affecting the separation and purification efficiency of the nitro compound. In view of the above problems, we propose a separation device for waste sulfuric acid and nitrotoluene compounds. Summary of the Invention

[0004] The purpose of the present invention is to provide a separation device for waste sulfuric acid and nitrotoluene compounds in view of the deficiencies of the prior art, and solve the problems 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 a countercurrent contact mechanism is not provided when the nitro compound is separated from the waste sulfuric acid, resulting in the inability of the waste sulfuric acid and the nitro compound to effectively carry out countercurrent contact and affecting the separation and purification efficiency of the nitro compound.

[0005] The present invention is implemented as follows. A separation device for waste sulfuric acid and nitrotoluene compounds, the separation device for waste sulfuric acid and nitrotoluene compounds includes:

[0006] Device support, the device support includes a tank support and an auxiliary support fixedly connected to the tank support;

[0007] Waste acid treatment tank, the waste acid treatment tank is fixedly installed on the tank support, a treatment tank cover plate is arranged at the top of the waste acid treatment tank, a waste acid discharge seat is arranged at the bottom of the waste acid treatment tank, and a waste acid confluence pipe, a nitrification recovery part, and a compound discharge pipe are respectively arranged on the treatment tank cover plate;

[0008] Device driving mechanism, the device driving mechanism is arranged on the tank support, 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;

[0009] 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 separating sulfuric acid, nitric acid, and nitrotoluene compounds;

[0010] Wherein, the auxiliary separation mechanism includes:

[0011] Separation linkage rod, the separation linkage rod is arranged in the waste acid treatment tank, and one end of the separation linkage rod is connected to the separation driving part;

[0012] Adjustable tray part, the adjustable tray part is arranged in the waste acid treatment tank, and the adjustable tray part is used to increase the contact area between the mixture and the steam in the waste acid treatment tank and decelerate and protect the rotation of the separation linkage rod;

[0013] Auxiliary separation part, the auxiliary separation part is arranged below the adjustable tray part, the auxiliary separation part is connected to the separation linkage rod, and the auxiliary separation part is used to assist in separating nitric acid and nitrotoluene compounds in waste sulfuric acid and uniformly heat the waste sulfuric acid.

[0014] Preferably, the separation driving part includes:

[0015] First runner, the first runner is fixedly connected to the output end of the driving motor;

[0016] Second runner rotatably installed above the treatment tank cover plate, the first runner and the second runner are rotationally connected by a conveyor belt, and the lower part of the second runner is fixedly connected to the end of the separation linkage rod;

[0017] Linkage gear ring, the linkage gear ring is fixedly installed on the second runner, and the linkage gear ring is connected to the discrete driving part.

[0018] Preferably, the auxiliary separation mechanism further includes:

[0019] 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;

[0020] 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.

[0021] Preferably, the compound dialing assembly comprises:

[0022] A first gear, wherein the first gear is fixedly sleeved on the separation linkage rod;

[0023] 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;

[0024] 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;

[0025] 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.

[0026] Preferably, the adjustable tray section comprises:

[0027] 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;

[0028] 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;

[0029] 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;

[0030] 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;

[0031] 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.

[0032] Preferably, the auxiliary separation unit comprises:

[0033] At least one set of auxiliary hinge rods, which are hinge-mounted at the lower end of the separation linkage rod;

[0034] A separation linkage seat rotatably arranged at the bottom of the inner cavity of the waste acid treatment tank, and at least one set of driving pin shafts are fixedly installed on the separation linkage seat;

[0035] At least one set of swing release seats, which are rotatably sleeved on the separation linkage seat. At least one set of helical tooth grooves are formed in the swing release seats, and meshing transmission is carried out between the helical tooth grooves and the driving pin shafts;

[0036] A swing positioning seat, which is rotatably connected with the swing release seat. The swing positioning seat is used to support and guide and limit the swing release seat, and is fixedly connected with the inner wall of the waste acid treatment tank;

[0037] A release nozzle, which is fixedly installed in the swing positioning seat. One side of the release nozzle is communicated with the spiral diversion pipe through a telescopic pipe, and the spiral diversion pipe is fixedly arranged in the waste acid treatment tank;

[0038] A steam injection pipe, which is fixedly installed at the bottom of the waste acid treatment tank, and one end of the steam injection pipe is communicated with the spiral diversion pipe.

[0039] Preferably, it further includes a compound separator, which is fixedly installed on the auxiliary bracket. The compound separator is used to assist in separating nitro compounds and nitrogen oxide gases. The compound separator includes:

[0040] A negative pressure separation tank, which is fixedly installed on the auxiliary bracket;

[0041] A negative pressure exhaust pump arranged on one side of the negative pressure separation tank, which is used to extract and recover nitrogen oxide gases;

[0042] A compound discharge port, which is arranged at the bottom of the negative pressure separation tank and is used to discharge the separated nitro compounds;

[0043] A compound discrete component, which is arranged on one side of the negative pressure separation tank. The compound discrete component is communicated with the compound discharge pipe and is also connected with the discrete driving part. The compound discrete component is used to discretely process nitro toluene compounds and assist in separating nitro toluene compounds and nitrogen oxide gases.

[0044] Preferably, the discrete driving part includes:

[0045] A second gear, which is arranged above the linkage gear ring and meshes with the linkage gear ring;

[0046] The discrete drive shaft is rotatably arranged on the cover plate of the processing tank. 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 with a third gear.

[0047] A fourth gear arranged below the third gear, which is in meshing transmission with the third gear, and the fourth gear is connected to the compound discrete component.

[0048] Preferably, the compound discrete component includes:

[0049] The discrete positioning seat is fixedly installed on the inner wall of the negative pressure separation tank, and at least one group of discrete positioning grooves is formed in the discrete positioning seat;

[0050] The discrete adjustment seat is arranged on one side of the discrete positioning seat, and at least one group of discrete adjustment grooves is formed in the discrete adjustment seat;

[0051] 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 pipe, and the other end of the spiral discrete tube is fixedly connected with the discrete adjustment seat;

[0052] The discrete sealing cover is arranged on one side of the discrete adjustment seat. The discrete sealing cover is used to seal the spiral discrete tube, and the discrete sealing cover is rotatably connected with the spiral discrete tube;

[0053] The discrete linkage block is arranged in the discrete adjustment groove, and the discrete linkage block is also slidably connected with the discrete positioning groove;

[0054] The compound conduction tube fixedly connected with the discrete linkage block is slidably connected with the side wall of the discrete sealing cover, and a compound shunt tube is detachably installed at the end of the compound conduction tube.

[0055] Preferably, the nitrification recovery part includes:

[0056] The nitric acid reflux pipe is fixedly installed on the cover plate of the processing tank;

[0057] The nitric acid pumping-in pump communicated with the nitric acid reflux pipe, and

[0058] The nitric acid recovery tank fixedly installed on the tank support, and the nitric acid recovery tank is communicated with the nitric acid pumping-in pump.

[0059] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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

[0065] Figure 1 It is a schematic structural diagram of a waste sulfuric acid nitrotoluene compound separation device provided by the present invention.

[0066] Figure 2 It is an axonometric diagram of the waste sulfuric acid nitrotoluene compound separation device provided by the present invention.

[0067] Figure 3 It is a top view of the waste sulfuric acid nitrotoluene compound separation device provided by the present invention.

[0068] Figure 4 yes Figure 3 AA section view.

[0069] Figure 5 It is a structural schematic diagram of the waste acid treatment tank provided by the present invention.

[0070] Figure 6 It is a front view of the waste acid treatment tank provided by the present invention.

[0071] Figure 7 yes Figure 6 BB section view.

[0072] Figure 8 It is a structural schematic diagram of the auxiliary separation mechanism provided by the present invention.

[0073] Figure 9 It is a schematic diagram of the structure of the compound toggle assembly provided by the present invention.

[0074] Figure 10 It is a structural schematic diagram of the adjustable tower plate portion provided by the present invention.

[0075] Figure 11 It is a schematic structural diagram of the auxiliary separation unit provided by the present invention.

[0076] Figure 12 yes Figure 11 Schematic diagram of the locally enlarged structure of A in the middle.

[0077] Figure 13 It is a schematic structural diagram of the compound separator provided by the present invention.

[0078] Figure 14 It is a schematic diagram of the structure of the discrete components of the compound provided by the present invention.

[0079] Figure 15 It is a top view of the discrete components of the compound provided by the present invention.

[0080] Figure 16 yes Figure 15 CC section view.

[0081] 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

[0082] 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.

[0083] Reference to "embodiment" in this document means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0084] When the existing device uses a liquid ring vacuum pump to press nitro compounds into the dispersion tube, the dilute nitric acid doped in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion tube, and there is no countercurrent contact mechanism when the nitro compounds are separated from the waste sulfuric acid, so that the waste sulfuric acid and nitro compounds cannot have effective countercurrent contact, affecting the separation and purification efficiency of nitro compounds. In view of the above problems, we propose a device for separating waste sulfuric acid and nitro toluene compounds. Briefly, the device is composed of a device support 1, a waste acid treatment tank 2, a device driving mechanism 4, and an auxiliary separation mechanism 6. The device support 1 includes a tank support 11 and an auxiliary support 12. The top of the waste acid treatment tank 2 is provided with a treatment tank cover plate 21, and the bottom of the waste acid treatment tank 2 is provided with an acid discharge seat 25. The treatment tank cover plate 21 is respectively provided with a waste acid confluence pipe 23, a nitration recovery part 22, and a compound discharge pipe 24. The auxiliary separation mechanism 6 includes a separation linkage rod 65, an adjustable tray part 62, and an auxiliary separation part 61. When separating the waste sulfuric acid, first pump the reacted waste sulfuric acid into the waste acid treatment tank 2 through the waste acid confluence pipe 23, and then start the device driving mechanism 4, the auxiliary separation part 61, the nitration recovery part 22, and the adjustable tray part 62. 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 evenly heated. The device driving mechanism 4 can also synchronously drive the adjustable tray part 62 to move, assisting in increasing the contact area between the mixture and the steam in the waste acid treatment tank 2, and protecting the rotation of the separation linkage rod 65 from deceleration. After the nitric acid and water are volatilized, close the nitration recovery part 22 and open the compound discharge pipe 24, and increase the heating temperature of the hot steam and the adjustable tray part 62, so that the nitro toluene compounds in the waste sulfuric acid after separating the dilute nitric acid are separated to the top of the waste acid treatment tank 2, realizing the separation of the waste sulfuric acid and the nitro toluene compounds. 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 tray part 62, and an auxiliary separation part 61. The separation linkage rod 65 is driven by the device driving mechanism 4 to synchronously drive the adjustable tray part 62 and the auxiliary separation part 61 to move. The adjustable tray part 62 and the auxiliary separation part 61 cooperate with each other not only to evenly release the pumped hot steam, ensuring that the materials in the waste acid treatment tank 2 are evenly heated, but also to increase the contact area between the mixture and the steam in the waste acid treatment tank 2, and protect the rotation of the separation linkage rod 65 from deceleration. The setting of the adjustable tray part 62 enables the waste sulfuric acid and nitro compounds to have effective countercurrent contact, ensuring that the nitro toluene compounds in the waste sulfuric acid after separating the dilute nitric acid are separated to the top of the waste acid treatment tank 2, realizing the rapid separation of the waste sulfuric acid and the nitro toluene compounds.When the existing device uses a liquid ring vacuum pump to press the nitro compound into the dispersion tube, the dilute nitric acid doped in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion tube, and there is no countercurrent contact mechanism when the nitro compound is separated from the waste sulfuric acid, so that the waste sulfuric acid and the nitro compound cannot carry out effective countercurrent contact, affecting the separation and purification efficiency of the nitro compound.

[0085] It should be noted that in the embodiment of the present invention, the waste sulfuric acid can be the waste acid liquid generated during the synthesis preparation of nitro toluene compounds and intermediates, and the waste sulfuric acid contains water, sulfuric acid, dilute nitric acid, mononitrotoluene, dinitrotoluene, and trinitrotoluene.

[0086] The embodiment of the present invention provides a device for separating waste sulfuric acid nitro toluene compounds, as Figures 1 - 4 shown, the device for separating waste sulfuric acid nitro toluene compounds includes:

[0087] A device support 1, the device support 1 includes a tank support 11 and an auxiliary support 12 fixedly connected to the tank support 11;

[0088] In this embodiment, the tank support 11 and the auxiliary support 12 are fixedly connected by welding or riveting, and the tank support 11 can be installed on one side of the waste acid treatment pipe of the nitro toluene compound preparation system.

[0089] A waste acid treatment tank 2, as Figures 5 - 7 shown, the waste acid treatment tank 2 is fixedly installed on the tank support 11, a treatment tank cover plate 21 is arranged at the top of the waste acid treatment tank 2, a waste acid discharge seat 25 is arranged at the bottom of the waste acid treatment tank 2, and a waste acid confluence pipe 23, a nitrification recovery part 22, and a compound discharge pipe 24 are respectively arranged on the treatment tank cover plate 21;

[0090] It should be noted that the waste acid treatment tank 2 can be a conical tank structure with a wider top and a narrower bottom. The outer wall of the waste acid treatment tank 2 is fixedly connected to the tank support 11 by welding or riveting. The top of the waste acid treatment tank 2 is fixedly connected to the treatment tank cover plate 21 by means of buckles and bolts. The waste acid confluence tank is connected to the waste acid treatment pipe of the nitro toluene compound preparation system through a sealed flange, and the compound discharge pipe 24 is fixedly installed on the side wall of the treatment tank cover plate 21 by riveting or clamping. An overflow tank is arranged at the top of the waste acid treatment tank 2, and the arrangement of the overflow tank facilitates the recovery treatment of the separated substances of the nitro toluene compound.

[0091] A device drive mechanism 4, the device drive mechanism 4 is arranged on the tank support 11, the device drive mechanism 4 includes a drive motor 41, a separation drive part 42, and a discrete drive part 43. The drive motor 41 is connected to the separation drive part 42, and the separation drive part 42 is connected to the discrete drive part 43;

[0092] In this embodiment, the driving motor 41 can be a forward and reverse servo motor, and the driving motor 41 is fixedly installed on the tank support 11 by welding or a clamp.

[0093] 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 for assisting in separating sulfuric acid, nitric acid, and nitrotoluene compounds;

[0094] Among them, as Figure 8 shown, the auxiliary separation mechanism 6 includes:

[0095] A separation linkage rod 65, the separation linkage rod 65 is arranged in the waste acid treatment tank 2, and one end of the separation linkage rod 65 is connected to the separation driving part 42;

[0096] In this embodiment, the separation linkage rod 65 penetrates through the treatment tank cover plate 21, and the separation linkage rod 65 is rotatably connected to the treatment tank cover plate 21 by means of a bearing or a roller.

[0097] An adjustable tray part 62, the adjustable tray part 62 is arranged in the waste acid treatment tank 2, and the adjustable tray part 62 is used to increase the contact area between the mixture and the steam in the waste acid treatment tank 2 and to decelerate and protect the rotation of the separation linkage rod 65;

[0098] An auxiliary separation part 61, the auxiliary separation part 61 is arranged below the adjustable tray part 62, the auxiliary separation part 61 is connected to the separation linkage rod 65, and the auxiliary separation part 61 is used for assisting in separating nitric acid and nitrotoluene compounds in the waste sulfuric acid and uniformly heating the waste sulfuric acid.

[0099] In this embodiment, when separating the waste sulfuric acid, first pump the reacted waste sulfuric acid into the waste acid treatment tank 2 through the waste acid manifold 23, and then start the device driving mechanism 4, the auxiliary separation part 61, the nitrification recovery part 22, and the adjustable tray part 62. 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 part 62 to move, assisting in increasing the contact area between the mixture and the steam in the waste acid treatment tank 2 and decelerating and protecting the rotation of the separation linkage rod 65. After the nitric acid and water are volatilized, close the nitrification recovery part 22, open the compound discharge pipe 24, and increase the heating temperature of the hot steam and the adjustable tray part 62, so that the nitrotoluene compounds in the waste sulfuric acid after separating the dilute nitric acid are separated to the top of the waste acid treatment tank 2, realizing the separation of the waste sulfuric acid and the nitrotoluene compounds.

[0100] 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 tray part 62, and an auxiliary separation part 61. The separation linkage rod 65 is driven by the device driving mechanism 4 to synchronously drive the adjustable tray part 62 and the auxiliary separation part 61 to move. The adjustable tray part 62 and the auxiliary separation part 61 cooperate with each other, which can not only make the pumped hot steam be evenly released, ensure that the materials in the waste acid treatment tank 2 are evenly heated, but also increase the contact area between the mixture and the steam in the waste acid treatment tank 2, and decelerate and protect the rotation of the separation linkage rod 65. The setting of the adjustable tray part 62 enables the waste sulfuric acid and nitro compounds to have effective countercurrent contact, ensuring that the nitrotoluene compounds in the waste sulfuric acid after separating dilute nitric acid are separated to the top of the waste acid treatment tank 2, realizing the rapid separation of waste sulfuric acid and nitrotoluene compounds. It overcomes the problem that when the existing device uses a liquid ring vacuum pump to press nitro compounds into the dispersion tube, the dilute nitric acid doped in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion tube, and there is no countercurrent contact mechanism when the nitro compounds are separated from the waste sulfuric acid, resulting in the inability of the waste sulfuric acid and nitro compounds to have effective countercurrent contact and affecting the separation and purification efficiency of the nitro compounds.

[0101] In a further preferred embodiment of the present invention, as Figures 1 - 2 shown, the separation driving part 42 includes:

[0102] A first runner 421, which is fixedly connected to the output end of the driving motor 41;

[0103] A second runner 422 rotatably installed above the treatment tank cover plate 21. The first runner 421 and the second runner 422 are rotationally connected by a conveyor belt 423. The lower part of the second runner 422 is fixedly connected to the end of the separation linkage rod 65;

[0104] A linkage gear ring 424, which is fixedly installed on the second runner 422, and the linkage gear ring 424 is connected to the discrete driving part 43.

[0105] In this embodiment, the first runner 421 is fixedly connected to the output end of the driving motor 41 by means of plugging or riveting, while the second runner 422 is rotatably connected to the treatment tank cover plate 21 by means of a bearing or a roller. The lower wall of the second runner 422 is fixedly connected to the end of the separation linkage rod 65 by means of welding or clamping, and the linkage gear ring 424 is fixedly arranged on the upper surface of the second runner 422 by means of welding or tenoning.

[0106] In a further preferred embodiment of the present invention, as Figure 8 shown, the auxiliary separation mechanism 6 further includes:

[0107] 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;

[0108] 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.

[0109] 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.

[0110] 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.

[0111] In a further preferred embodiment of the present invention, Figure 9 As shown, the compound dial assembly 64 includes:

[0112] A first gear 641, wherein the first gear 641 is fixedly sleeved on the separation linkage rod 65;

[0113] 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;

[0114] 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;

[0115] 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.

[0116] 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.

[0117] 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.

[0118] In a further preferred embodiment of the present invention, Figure 10 As shown, the adjustable tray portion 62 includes:

[0119] 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;

[0120] 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.

[0121] 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;

[0122] It should be noted that the number of the swinging trays 623 can be 2 - 8 groups, and the swinging trays 623 can be circular plates or circular seats with hollow interiors. The swinging trays 623 are made of corrosion - resistant alloys or quartz materials. The shape of the tray driving groove 624 can be circular, square or oval, and the tray limiting groove 625 can be an arc - shaped groove. The tray limiting grooves 625 are circumferentially arranged at the edge of the swinging tray 623.

[0123] At least one set of material - guiding leakage holes 628, the material - guiding leakage holes 628 are opened in the swinging tray 623, and the material - guiding leakage holes 628 are used to guide the mixture and steam in the waste acid treatment tank 2, and assist in increasing the contact area between the mixture and the steam;

[0124] In this embodiment, the material - guiding leakage holes 628 can be diamond - shaped, arc - shaped, or circular groove structures, and the material - guiding leakage holes 628 are circumferentially arranged in the swinging tray 623. The arrangement of the material - guiding leakage holes 628 enables the steam and the material to be in full contact when the hot steam is released, which helps the nitro - compound to form fine droplets or thin films, increases the surface area of the inter - phase mass transfer, thereby improving the mass transfer rate and ensuring the separation efficiency of the waste sulfuric acid and the nitrotoluene compound.

[0125] The driving cam 622 fixedly sleeved on the outer wall of the separation linkage rod 65, the driving cam 622 is movably inserted into the tray driving groove 624, and the driving cam 622 is fixedly sleeved on the outer wall of the separation linkage rod 65 in a plug - in or mortise - and - tenon connection manner;

[0126] At least one set of tray limiting rods 626, the tray limiting rods 626 are fixedly installed on the inner wall of the waste acid treatment tank 2, the tray limiting rods 626 are slidably connected with the tray limiting grooves 625, and tray positioning seats 627 are respectively fixedly installed on the upper and lower sides of the tray limiting rods 626.

[0127] In this embodiment, the tray limiting rods 626 are circumferentially arranged on the inner wall of the waste acid treatment tank 2. The arrangement of the tray limiting rods 626 realizes the support and limitation of the swinging tray 623, and avoids the falling off of the swinging tray 623.

[0128] In an embodiment of the present invention, an adjustable tray part 62 is provided. The adjustable tray part 62 is composed of a swinging tray 623, a material guiding leakage hole 628, and a driving cam 622. The swinging tray 623 can be driven by the driving cam 622 and thus move in the waste acid treatment tank 2 in a circumferentially swinging manner. On the one hand, it enables effective countercurrent contact between waste sulfuric acid and nitro compounds, and also prevents nitro toluene compounds from adsorbing on its surface. The setting of the material guiding leakage hole 628 allows the steam and the material to fully contact when the hot steam is released, which helps the nitro compounds to form fine droplets or thin films, increasing the surface area of interphase mass transfer, thereby improving the mass transfer rate and ensuring the separation efficiency of waste sulfuric acid and nitro toluene compounds. On the other hand, the setting of the swinging tray 623 can perform multi-stage deceleration on the separation linkage rod 65, thereby avoiding the risk of splashing and overheating caused by violently stirring the waste sulfuric acid.

[0129] In a further preferred embodiment of the present invention, as Figures 11 - 12 shown, the auxiliary separation part 61 includes:

[0130] At least one group of auxiliary hinged rods 611, the auxiliary hinged rods 611 are hingedly installed at the lower end of the separation linkage rod 65, the number of the auxiliary hinged rods 611 is 1 - 4 groups, and the auxiliary hinged rods 611 are arranged obliquely;

[0131] A separation linkage seat 612 rotatably arranged at the bottom of the inner cavity of the waste acid treatment tank 2, and at least one group of driving pin shafts 613 are fixedly installed on the separation linkage seat 612;

[0132] The separation linkage seat 612 is rotatably connected to the inner cavity of the waste acid treatment tank 2 by means of a bearing or a roller rack. The driving pin shafts 613 are circumferentially arranged on the separation linkage seat 612, and the separation linkage seat 612 is fixedly connected to the lower end of the auxiliary hinged rod 611 by means of a buckle or insertion.

[0133] At least one group of swinging release seats 614, the swinging release seats 614 are rotatably sleeved on the separation linkage seat 612, at least one group of helical grooves 615 are formed in the swinging release seats 614, and the helical grooves 615 are in meshing transmission with the driving pin shafts 613;

[0134] It should be noted that the swinging release seat 614 can be a hollow circular seat or a circular ring inside, and the number of the swinging release seats 614 is 3 - 6 groups. The swinging release seats 614 are rotatably connected to the swinging positioning seat 616 by means of bearings.

[0135] A swinging positioning seat 616, the swinging positioning seat 616 is rotatably connected to the swinging release seat 614. The swinging positioning seat 616 is used to support and guide and limit the swinging release seat 614, and the swinging positioning seat 616 is fixedly connected to the inner wall of the waste acid treatment tank 2;

[0136] 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;

[0137] 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 .

[0138] 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.

[0139] 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.

[0140] 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.

[0141] In a further preferred embodiment of the present invention, Figure 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:

[0142] A negative pressure separation tank 31, wherein the negative pressure separation tank 31 is fixedly mounted on the auxiliary bracket 12;

[0143] 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;

[0144] Compound discharge port 33, the compound discharge port 33 is arranged at the bottom of the negative pressure separation tank 31, and the compound discharge port 33 is used to discharge the separated nitro compound.

[0145] It should be noted that the negative pressure separation tank 31 can be a rectangular tank or a circular tank with a hollow interior. The negative pressure exhaust pump 32 is fixedly installed at the top of the side wall of the negative pressure separation tank 31 by means of buckles or welding, and the negative pressure separation tank 31 is fixedly connected to the auxiliary support 12 by means of buckles or fastening bolts.

[0146] Compound discrete component 5, the compound discrete component 5 is arranged on one side of the negative pressure separation tank 31. The compound discrete component 5 is communicated with the compound discharge pipe 24, and the compound discrete component 5 is also connected to the discrete driving part 43. The compound discrete component 5 is used for discretely processing the nitrotoluene compound and assisting in separating the nitrotoluene compound and nitrogen oxide gas.

[0147] In the embodiment of the present invention, there is a compound discrete component 5. The compound discrete component 5 can fully discrete the separated nitrotoluene compound droplet film, thereby ensuring the efficient separation and release of nitrogen oxide gas and avoiding the interference of nitrogen oxide gas on the purification of the nitrotoluene compound droplet film.

[0148] In a further preferred embodiment of the present invention, as Figures 14 - 16 shown, the discrete driving part 43 includes:

[0149] A second gear 431, the second gear 431 is arranged above the linkage gear ring 424, and the second gear 431 is in meshing transmission with the linkage gear ring 424;

[0150] A discrete driving shaft 432, the discrete driving shaft 432 is rotatably arranged on the processing tank cover plate 21. One end of the discrete driving shaft 432 is fixedly connected to the second gear 431, and the other end of the discrete driving shaft 432 is fixedly connected to a third gear 433;

[0151] A fourth gear 434 arranged below the third gear 433, the fourth gear 434 is in meshing transmission with the third gear 433, and the fourth gear 434 is connected to the compound discrete component 5.

[0152] In this embodiment, the second gear 431 is welded or riveted to one end of the discrete driving shaft 432. The discrete driving shaft 432 is rotatably connected to the upper surface of the processing tank cover plate 21 by means of bearings or rollers. The other end of the discrete driving shaft 432 is welded or riveted to the third gear 433. The third gear 433 and the fourth gear 434 are rotatably connected to the auxiliary support 12 by means of bearings or rollers.

[0153] In a further preferred embodiment of the present invention, as Figures 14 - 16 shown, the compound discrete component 5 includes:

[0154] A discrete positioning seat 51, which is fixedly installed on the inner wall of the negative pressure separation tank 31. At least one group of discrete positioning grooves 53 are provided in the discrete positioning seat 51;

[0155] A discrete adjustment seat 52, which is arranged on one side of the discrete positioning seat 51, and at least one group of discrete adjustment grooves 54 are provided in the discrete adjustment seat 52;

[0156] 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 snap - fasteners 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, the discrete adjustment groove 54 is an arc - shaped groove structure, and the number of the discrete positioning grooves 53 and the discrete adjustment grooves 54 can be 3 - 8 groups.

[0157] A spiral discrete tube 59, which is fixedly installed in the fourth gear 434. One end of the spiral discrete tube 59 is rotatably connected to the compound discharge pipe 24, and the other end of the spiral discrete tube 59 is fixedly connected to the discrete adjustment seat 52;

[0158] In this embodiment, the spiral discrete tube 59 is hollow inside. The outer wall of the spiral discrete tube 59 is fixedly connected to the central position of the fourth gear 434 by means of plugging or riveting. One end of the spiral discrete tube 59 is rotatably connected to the compound discharge pipe 24 through a bearing. The other end of the spiral discrete tube 59 is fixedly connected to the discrete adjustment seat 52 by means of plugging or riveting. A spiral groove or a spiral plate structure is provided inside the spiral discrete tube 59. The setting of the spiral discrete tube 59 further realizes the discrete treatment of the p - nitrotoluene compound.

[0159] A discrete seal cover 57, which is arranged on one side of the discrete adjustment seat 52. The discrete seal cover 57 is used to enclose the spiral discrete tube 59, and the discrete seal cover 57 is rotatably connected to the spiral discrete tube 59;

[0160] A discrete linkage block 55, which is arranged in the discrete adjustment groove 54, and the discrete linkage block 55 is also slidably connected to the discrete positioning groove 53;

[0161] A compound conduction pipe 56 fixedly connected to the discrete linkage block 55, which is slidably connected to the side wall of the discrete seal cover 57. A compound shunt pipe 58 is detachably installed at the end of the compound conduction pipe 56.

[0162] In this embodiment, the discrete seal cover 57 is rotatably connected to the end wall of the spiral discrete tube 59 through a bearing or a seal flange. 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 conduction tube 56 by a snap or a bolt. The compound shunt tube 58 is installed in the compound conduction tube 56 by a snap or a thread.

[0163] After the dilute nitric acid is separated, the negative pressure exhaust pump 32 is turned on, and a negative pressure environment is formed in the negative pressure separation tank 31. When the nitrotoluene compound flows into the spiral discrete tube 59 through the compound discharge pipe 24, the rotation of the linkage gear ring 424 at this time can 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 discretize 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 conduction tube 56 to move synchronously, further dispersing and separating the discretized nitrotoluene compound by the compound conduction tube 56, making the nitrogen oxide fully discrete, and further purifying the droplet-shaped nitrotoluene compound.

[0164] In a further preferred embodiment of the present invention, as Figures 1 - 2 shown, the nitrification recovery unit 22 includes:

[0165] A nitric acid reflux pipe 223, which is fixedly installed on the treatment tank cover plate 21;

[0166] A nitric acid suction pump 222 communicated with the nitric acid reflux pipe 223, and

[0167] A nitric acid recovery tank 221 fixedly installed on the tank support 11, and the nitric acid recovery tank 221 is communicated with the nitric acid suction pump 222.

[0168] In this embodiment, the nitric acid reflux pipe 223 is fixedly installed on the treatment tank cover plate 21 by a snap or a thread, while the nitric acid recovery tank 221 is fixedly installed on the tank support 11 by a snap or a fastening bolt.

[0169] In summary, the present invention provides a waste sulfuric acid nitro - toluene compound separation device. When separating waste sulfuric acid, first, the reacted waste sulfuric acid is pumped into the waste acid treatment tank 2 through the waste acid manifold 23. Then, the device driving mechanism 4, the auxiliary separation part 61, the nitration recovery part 22, and the adjustable tray part 62 are started. 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 evenly heated. The device driving mechanism 4 can also synchronously drive the adjustable tray part 62 to move, assisting in increasing the contact area between the mixture and the steam in the waste acid treatment tank 2 and protecting the rotation of the separation link rod 65 from deceleration. After the nitric acid and water are completely volatilized, the nitration recovery part 22 is closed, and the compound discharge pipe 24 is opened, increasing the heating temperature of the hot steam and the adjustable tray part 62, so that the nitro - toluene compound in the waste sulfuric acid after separating the dilute nitric acid is separated to the top of the waste acid treatment tank 2, realizing the separation of waste sulfuric acid and nitro - toluene compound.

[0170] 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 link rod 65, an adjustable tray part 62, and an auxiliary separation part 61. The separation link rod 65 is driven by the device driving mechanism 4 and can synchronously drive the adjustable tray part 62 and the auxiliary separation part 61 to move. The adjustable tray part 62 and the auxiliary separation part 61 cooperate with each other, which can not only make the pumped hot steam evenly released, ensuring that the materials in the waste acid treatment tank 2 are evenly heated, but also increase the contact area between the mixture and the steam in the waste acid treatment tank 2 and protect the rotation of the separation link rod 65 from deceleration. The setting of the adjustable tray part 62 enables the waste sulfuric acid and nitro - compounds to have effective counter - current contact, ensuring that the nitro - toluene compound in the waste sulfuric acid after separating the dilute nitric acid is separated to the top of the waste acid treatment tank 2, realizing the rapid separation of waste sulfuric acid and nitro - toluene compound. It overcomes the problems that when the existing device uses a liquid - ring vacuum pump to press the nitro - compound into the dispersion tube, the dilute nitric acid doped in the waste sulfuric acid in the waste acid tank is easily pumped into the dispersion tube, and there is no counter - current contact mechanism when the nitro - compound is separated from the waste sulfuric acid, so that the waste sulfuric acid and nitro - compound cannot have effective counter - current contact, affecting the separation and purification efficiency of the nitro - compound.

[0171] It should be noted that for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps may be in other sequences or carried out 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 essential to the present invention.

[0172] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the invention. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without creative efforts, combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A waste sulfuric acid nitro - toluene compound separation device, characterized in that, The waste sulfuric acid nitro - toluene compound separation device includes: A device support (1), where the device support (1) includes a tank support (11) and an auxiliary support (12) fixedly connected to the tank support (11); A waste acid treatment tank (2), which is fixedly installed on the tank support (11). A treatment tank cover plate (21) is provided at 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). A waste acid confluence pipe (23), a nitrification recovery part (22), and a compound discharge pipe (24) are respectively provided on the treatment tank cover plate (21); A device driving mechanism (4), which is provided on the tank support (11). 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); An auxiliary separation mechanism (6), which is provided in the waste acid treatment tank (2). The auxiliary separation mechanism (6) is used to assist in separating sulfuric acid, nitric acid, and nitro - toluene compounds; It also includes a compound separator (3) fixedly installed on the auxiliary support (12). The compound separator (3) includes: a negative - pressure separation tank (31) fixedly installed on the auxiliary support (12), a negative - pressure exhaust pump (32), a compound discharge port (33), and a compound discrete component (5). The compound discrete component (5) is provided on one side of the negative - pressure separation tank (31). The compound discrete component (5) is in communication with the compound discharge pipe (24), and the compound discrete component (5) is also connected to the discrete driving part (43). The compound discrete component (5) is used for discrete treatment of nitro - toluene compounds and assisting in separating nitro - toluene compounds and nitrogen oxide gases; Among them, the auxiliary separation mechanism (6) includes: A separation linkage rod (65), which is provided in the waste acid treatment tank (2), and one end of the separation linkage rod (65) is connected to the separation driving part (42); An adjustable tray part (62), which is provided in the waste acid treatment tank (2). The adjustable tray part (62) is used to increase the contact area between the mixture and steam in the waste acid treatment tank (2) and decelerate and protect the rotation of the separation linkage rod (65); An auxiliary separation part (61), which is provided below the adjustable tray 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 nitro - toluene compounds in the waste sulfuric acid and uniformly heat the waste sulfuric acid; The adjustable tray part (62) includes: A spiral heating pipe (621), which is fixedly embedded in the inner wall of the waste acid treatment tank (2). The spiral heating pipe (621) is 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 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 steam in the waste acid treatment tank (2) and to help increase 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.

2. The waste sulfuric acid nitro toluene compound separation device according to claim 1, characterized in that: The separation drive unit (42) comprises: A first rotating wheel (421), wherein the first rotating wheel (421) is 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 nitro toluene compound separation device according to claim 1, characterized in that: The auxiliary separation mechanism (6) further comprises: 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); A compound shifting assembly (64) is arranged in the treatment tank cover plate (21), the compound shifting assembly (64) is connected to the 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 and nitrotoluene compound separation device according to claim 3, wherein: 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), 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; A tooth seat guide rail (643) fixedly embedded in the treatment 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 nitro-toluene compound separation device according to claim 4, characterized in that: The auxiliary separation part (61) includes: At least one group of auxiliary hinge rods (611), and the auxiliary hinge rods (611) are hingedly installed at the lower end of the separation linkage rod (65); A separation linkage seat (612) rotatably arranged at the bottom of the inner cavity of the waste acid treatment tank (2), and at least one group of driving pin shafts (613) are fixedly installed on the separation linkage seat (612); At least one group of swing release seats (614), the swing release seats (614) are rotatably sleeved on the separation linkage seat (612), at least one group of helical tooth grooves (615) are formed in the swing release seats (614), and the helical tooth grooves (615) are in meshing transmission with the driving pin shafts (613); A swing positioning seat (616), the swing positioning seat (616) is rotatably connected with the swing release seat (614), the swing positioning seat (616) is used for supporting and guiding and limiting the swing release seat (614), and the swing positioning seat (616) is fixedly connected with the inner wall of the waste acid treatment tank (2); A release nozzle (617), the release nozzle (617) is fixedly installed in the swing positioning seat (616), one side of the release nozzle (617) is communicated with the spiral diversion pipe (618) through a telescopic pipe, and the spiral diversion pipe (618) is fixedly arranged in the waste acid treatment tank (2); A steam injection pipe (619), 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 communicated with the spiral diversion pipe (618).

6. The waste sulfuric acid nitro-toluene compound separation device according to claim 2, characterized in that: It further includes a compound separator (3), the compound separator (3) is fixedly installed on the auxiliary bracket (12), the compound separator (3) is used for assisting in separating nitro compounds and nitrogen oxide gases, and the compound separator (3) includes: A negative pressure separation tank (31), the negative pressure separation tank (31) is fixedly installed on the auxiliary bracket (12); A negative pressure exhaust pump (32) arranged on one side of the negative pressure separation tank (31), and the negative pressure exhaust pump (32) is used for extracting and recovering nitrogen oxide gases; A compound discharge port (33), the compound discharge port (33) is arranged at the bottom of the negative pressure separation tank (31), and the compound discharge port (33) is used for discharging the separated nitro compounds; A compound discrete component (5), the compound discrete component (5) is arranged on one side of the negative pressure separation tank (31), the compound discrete component (5) is communicated with the compound discharge pipe (24), and the compound discrete component (5) is also connected with the discrete driving part (43), and the compound discrete component (5) is used for discretely processing nitro toluene compounds and assisting in separating nitro toluene compounds and nitrogen oxide gases.

7. The waste sulfuric acid nitro toluene compound separation device according to claim 6, characterized in that: The discrete driving part (43) includes: A second gear (431), the second gear (431) is arranged above the linkage gear ring (424), and the second gear (431) is in meshing transmission with the linkage gear ring (424); The discrete drive shaft (432) is rotationally arranged on the processing 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 a third gear (433). A fourth gear (434) is arranged below the third gear (433). The fourth gear (434) is in meshing transmission with the third gear (433), and the fourth gear (434) is connected to the compound discrete component (5).

8. The waste sulfuric acid nitro-toluene compound separation device according to claim 7, wherein: The compound discrete component (5) includes: A discrete positioning seat (51) fixedly installed on the inner wall of the negative pressure separation tank (31). At least one group of discrete positioning grooves (53) is provided in the discrete positioning seat (51). A discrete adjustment seat (52) arranged on one side of the discrete positioning seat (51). At least one group of discrete adjustment grooves (54) is provided in the discrete adjustment seat (52). A spiral discrete pipe (59) fixedly installed in the fourth gear (434). One end of the spiral discrete pipe (59) is rotationally connected to the compound discharge pipe (24), and the other end of the spiral discrete pipe (59) is fixedly connected to the discrete adjustment seat (52). A discrete sealing cover (57) arranged on one side of the discrete adjustment seat (52). The discrete sealing cover (57) is used to seal the spiral discrete pipe (59), and the discrete sealing cover (57) is rotationally connected to the spiral discrete pipe (59). A discrete linkage block (55) arranged in the discrete adjustment groove (54). The discrete linkage block (55) is also slidably connected to the discrete positioning groove (53). A compound conduction pipe (56) fixedly connected to the discrete linkage block (55). The compound conduction pipe (56) is slidably connected to the side wall of the discrete sealing cover (57), and a compound shunt pipe (58) is detachably installed at the end of the compound conduction pipe (56).

9. The waste sulfuric acid and nitrotoluene compound separation device according to any one of claims 2-4, characterized in that: The nitrification recovery part (22) includes: A nitric acid reflux pipe (223) fixedly installed on the processing tank cover plate (21). A nitric acid suction pump (222) communicated with the nitric acid reflux pipe (223), and A nitric acid recovery tank (221) fixedly installed on the tank support (11). The nitric acid recovery tank (221) is communicated with the nitric acid suction pump (222).

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