Desolventizing device for 2-ethyl anthraquinone production

Abstract

The utility model discloses a desolventizing device for producing 2-ethyl anthraquinone. The desolventizing device comprises a reaction kettle, a preheating tank, a first desolventizing tank and a second desolventizing tank, a feed port and a discharge port of the preheating tank are respectively communicated with an organic phase outlet of the reaction kettle and a liquid inlet of the first desolventizing tank; a gas outlet of the first desolventizing tank is sequentially communicated with a condenser and a solvent recovery tank; a liquid outlet of the first desolventizing tank is communicated with a BE acid recovery tank; a feed port of the first desolventizing tank is communicated with a water phase outlet of the reaction kettle, a feed port of the second desolventizing tank is communicated with a water phase outlet of the reaction kettle, a gas outlet of the second desolventizing tank is communicated with a gas inlet of the preheating tank, a discharge port of the second desolventizing tank is communicated with an aluminum trichloride recovery tank, and gas inlets of the first desolventizing tank and the second desolventizing tank are communicated with a steam storage tank. The device can effectively recover the solvent, the aluminum trichloride and the BE acid, can realize the recycling of heat, reduces the energy consumption, and greatly reduces the production cost of the 2-ethyl anthraquinone.

Description

Technical Field

[0001] The utility model relates to a 2-ethylanthraquinone production device, in particular to a desolventizing device for the production of 2-ethylanthraquinone. Background Art

[0002] 2-Ethylanthraquinone is an important fine chemical raw material, mainly used for the preparation of hydrogen peroxide. At present, 2-ethylanthraquinone is mainly prepared by using phthalic anhydride and benzene as raw materials, and firstly undergoing Friedel-Crafts acylation reaction under the condition of AlCl3 as a catalyst to generate 2-ethylbenzoyl benzoic acid aluminum double salt; then hydrolyzed by acidic aqueous solution to obtain 2-(4'-ethylbenzoyl)benzoic acid. 2-(4'-ethylbenzoyl)benzoic acid undergoes a ring-closing reaction under the action of fuming sulfuric acid to generate 2-ethylanthraquinone. The above production process will use a large amount of solvent and has high energy consumption, which greatly increases the production cost of 2-ethylanthraquinone. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a desolventizing device for the production of 2-ethylanthraquinone is provided, the device can effectively recover the solvent, aluminum chloride and BE acid, and can realize the recycling of heat, thereby reducing energy consumption and greatly reducing the production cost of 2-ethylanthraquinone.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A desolventizing device for producing 2-ethylanthraquinone comprises a reactor, a preheating tank, a first desolventizing tank and a second desolventizing tank; the feed port and the discharge port of the preheating tank are respectively connected to the organic phase outlet of the reactor and the liquid inlet of the first desolventizing tank; the gas outlet of the first desolventizing tank is connected to a condenser and a solvent recovery tank in sequence; the liquid outlet of the first desolventizing tank is connected to a BE acid recovery tank; the feed port of the second desolventizing tank is connected to the water phase outlet of the reactor, the gas outlet of the second desolventizing tank is connected to the gas inlet of the preheating tank, the discharge port of the second desolventizing tank is connected to an aluminum chloride recovery tank, and the gas inlets of the first desolventizing tank and the second desolventizing tank are both connected to a steam storage tank.

[0006] As an improved technical solution, a first steam coil is provided in the preheating tank, and an air inlet and an air outlet of the first steam coil are respectively connected to an air outlet of the second desolventizing tank and the heating tank.

[0007] As an improved technical solution, a second steam coil is provided in the first desolventizing tank, and an air inlet and an air outlet of the second steam coil are respectively connected to the steam storage tank and the heating tank.

[0008] As an improved technical solution, a third steam coil is provided in the second desolventizing tank, and an air inlet and an air outlet of the third steam coil are connected to the steam storage tank and the heating tank respectively.

[0009] As an improved technical solution, a first stirring device is provided in the reactor, and the first stirring device includes a first stirring motor, a first stirring shaft connected to the first stirring motor, and a plurality of first stirring rods provided on the first stirring shaft.

[0010] As an improved technical solution, a second stirring device is provided in the first desolventizing tank, and the second stirring device includes a second stirring motor, a second stirring shaft connected to the second stirring motor, and a second stirring rod arranged on the second stirring shaft, and the second steam coil is arranged on the outside of the second stirring rod.

[0011] As an improved technical solution, a third stirring device is provided in the second desolventizing tank, and the third stirring device includes a third stirring motor, a third stirring shaft connected to the third stirring motor, and a third stirring rod arranged on the third stirring shaft, and the third steam coil is arranged on the outside of the third stirring rod.

[0012] As an improved technical solution, the outer sides of the second stirring rod and the third stirring rod are movably provided with a plurality of arc-shaped stirring blades through a swing joint.

[0013] As an improved technical solution, the swing joint includes a fixed part and a movable part, the fixed part is provided with a movable groove, the movable part is movably connected to the movable groove through a circular movable head, and the arc-shaped stirring blade is fixedly connected to the movable part.

[0014] As an improved technical solution, a plurality of turbulent holes are provided on the arc-shaped stirring blade.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] The utility model provides a desolventizing device for the production of 2-ethylanthraquinone, including a reaction kettle, a preheating tank, a first desolventizing tank, a second desolventizing tank, a condenser, a solvent recovery tank, a BE acid recovery tank, an aluminum chloride recovery tank and a steam storage tank; the organic phase of the acylated hydrolyzate is preheated by the preheating tank and then the solvent is removed by the first desolventizing tank, the gas evaporated from the first desolventizing tank is condensed by the condenser and then enters the solvent recovery tank for recycling, the liquid after removal enters the BE acid recovery tank for the next step of reaction, the aqueous phase of the acylated hydrolyzate is desolventized by the second desolventizing tank to obtain aluminum chloride, and enters the aluminum chloride recovery tank for recycling. The steam generated by the second desolventizing tank enters the preheating tank for recycling; the above arrangement not only realizes the recovery of aluminum chloride, BE acid and solvent, but also greatly reduces energy consumption and reduces the production cost of 2-ethylanthraquinone.

[0017] The preheating tank, the first desolventizing tank and the second desolventizing tank of the device are respectively provided with the first steam coil, the second steam coil and the third steam coil, which greatly improves the heat exchange efficiency of the device.

[0018] The outer sides of the second stirring rod and the third stirring rod of the device are both movably provided with a plurality of arc-shaped stirring blades through a swing joint; and a plurality of flow disturbance holes are provided on the arc-shaped stirring blades. The movable setting of the arc-shaped stirring blades can increase the turbulent effect of the liquid, so that the material exchange between the various parts in the fluid is more sufficient. Moreover, the flow disturbance holes provided on the arc-shaped stirring blades can generate disturbances and eddies, further enhancing the mixing effect, thereby improving the desolventizing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 3 It is a schematic diagram of the structure of the swing joint;

[0023] In the figure, 1, reactor; 2, preheating tank; 3, first desolventizing tank; 4, second desolventizing tank; 5, condenser; 6, solvent recovery tank; 7, BE acid recovery tank; 8, aluminum chloride recovery tank; 9, steam storage tank; 10, first steam coil; 11, heating tank; 12, second steam coil; 13, third steam coil; 14, first stirring motor; 15, first stirring shaft; 16, first stirring rod; 17, second stirring motor; 18, second stirring shaft; 19, second stirring rod; 20, third stirring motor; 21, third stirring shaft; 22, third stirring rod; 23, swing joint; 2301, fixed part; 2302, movable part; 2303, movable groove; 2304, circular movable head; 24, arc-shaped stirring blade; 25, spoiler hole. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0027] Example 1

[0028] like Figures 1 to 3 As shown, a desolventizing device for producing 2-ethylanthraquinone comprises a reactor 1, a preheating tank 2, a first desolventizing tank 3 and a second desolventizing tank 4; the feed port and the discharge port of the preheating tank 2 are respectively connected to the organic phase outlet of the reactor 1 and the liquid inlet of the first desolventizing tank 3; the gas outlet of the first desolventizing tank 3 is connected to the condenser 5 and the solvent recovery tank 6 in sequence; the liquid outlet of the first desolventizing tank 3 is connected to the BE acid recovery tank 7; the feed port of the second desolventizing tank 4 is connected to the water phase outlet of the reactor 1, the gas outlet of the second desolventizing tank 4 is connected to the gas inlet of the preheating tank 2, the discharge port of the second desolventizing tank 4 is connected to the aluminum chloride recovery tank 8, and the gas inlets of the first desolventizing tank 3 and the second desolventizing tank 4 are both connected to the steam storage tank 9.

[0029] After the acylated hydrolyzate in the reactor 1 is allowed to stand for stratification, the organic phase enters the first desolventizing tank 3, and the aqueous phase enters the second desolventizing tank 4. The organic phase in the first desolventizing tank 3 is heated at a certain temperature to remove the solvent, and the gas generated by the heating is condensed by the condenser 5 and collected in the solvent recovery tank 6, and reused in the production of 2-ethylanthraquinone. The remaining liquid after removing the solvent is BE acid, which enters the BE acid recovery tank 7 for the next reaction. The aqueous phase in the second desolventizing tank 4 is an aluminum chloride solution, and the aluminum chloride obtained after removing the solvent enters the aluminum chloride recovery tank 8 for recovery; the gas evaporated in the second desolventizing tank 4 enters the preheating tank 2 to preheat the organic phase, realizing heat recovery.

[0030] Further, in this embodiment, if Figure 1 As shown, the preheating tank 2 is provided with a first steam coil 10, and the air inlet and air outlet of the first steam coil 10 are respectively connected to the air outlet of the second desolventizing tank 4 and the heating tank 11; the first desolventizing tank 3 is provided with a second steam coil 12, and the air inlet and air outlet of the second steam coil 12 are respectively connected to the steam storage tank 9 and the heating tank 11; the second desolventizing tank 4 is provided with a third steam coil 13, and the air inlet and air outlet of the third steam coil 13 are respectively connected to the steam storage tank 9 and the heating tank 11. The heat exchange efficiency of the device is greatly improved by the arrangement of the first steam coil 10, the second steam coil 12 and the third steam coil 13.

[0031] Further, in this embodiment, if Figure 1As shown, a first stirring device is arranged in the reactor 1 , and the first stirring device includes a first stirring motor 14 , a first stirring shaft 15 connected to the first stirring motor 14 , and a plurality of first stirring rods 16 arranged on the first stirring shaft 15 .

[0032] Further, in this embodiment, if Figure 1 As shown, the first desolventizing tank 3 is provided with a second stirring device, the second stirring device includes a second stirring motor 17, a second stirring shaft 18 connected to the second stirring motor 17, and a second stirring rod 19 arranged on the second stirring shaft 18, and the second steam coil 12 is sleeved on the outside of the second stirring rod 19; the second desolventizing tank 4 is provided with a third stirring device, the third stirring device includes a third stirring motor 20, a third stirring shaft 21 connected to the third stirring motor 20, and a third stirring rod 22 arranged on the third stirring shaft 21, and the third steam coil 13 is sleeved on the outside of the third stirring rod 22. The desolventizing efficiency of the device is improved by the provision of the second stirring device and the third stirring device.

[0033] Further, in this embodiment, if Figure 2 and Figure 3 As shown, the outer sides of the second stirring rod 19 and the third stirring rod 22 are both movably provided with a plurality of arc-shaped stirring blades 24 through a swing joint 23; and a plurality of spoiler holes 25 are provided on the arc-shaped stirring blades 24.

[0034] Furthermore, if Figure 3 As shown, the swing joint 23 includes a fixed part 2301 and a movable part 2302; the fixed part 2301 is provided with a movable groove 2303, the movable part 2302 is movably connected to the movable groove 2303 through a circular movable head 2304, and the arc-shaped stirring blade 24 is fixedly connected to the movable part 2302.

[0035] The arrangement of multiple arc-shaped stirring blades 24 and the arrangement of the turbulent holes 25 on the arc-shaped stirring blades 24 help to increase the turbulence effect during the stirring process, thereby improving the mixing efficiency. Moreover, the movable arrangement of the multiple arc-shaped stirring blades 24 and the joint arrangement with the second stirring rod 19 and the third stirring rod 22 can effectively ensure that the turbulence effect can cover different areas in the first desolventizing tank 3 or the second desolventizing tank 4, thereby further improving the stirring efficiency.

[0036] In addition, it should be understood that after reading the contents taught in the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A desolventizing device for producing 2-ethylanthraquinone, characterized in that: It includes a reactor, a preheating tank, a first desolventizing tank and a second desolventizing tank; the feed port and the discharge port of the preheating tank are respectively connected to the organic phase outlet of the reactor and the liquid inlet of the first desolventizing tank; the gas outlet of the first desolventizing tank is connected to a condenser and a solvent recovery tank in sequence; the liquid outlet of the first desolventizing tank is connected to a BE acid recovery tank; the feed port of the second desolventizing tank is connected to the water phase outlet of the reactor, the gas outlet of the second desolventizing tank is connected to the gas inlet of the preheating tank, the discharge port of the second desolventizing tank is connected to an aluminum chloride recovery tank, and the gas inlets of the first desolventizing tank and the second desolventizing tank are both connected to a steam storage tank.

2. A desolventizing device for producing 2-ethylanthraquinone according to claim 1, characterized in that: A first steam coil is arranged in the preheating tank, and an air inlet and an air outlet of the first steam coil are respectively connected to an air outlet of the second desolventizing tank and the heating tank.

3. A desolventizing device for producing 2-ethylanthraquinone according to claim 2, characterized in that: A second steam coil is arranged in the first desolventizing tank, and an air inlet and an air outlet of the second steam coil are respectively connected to the steam storage tank and the heating tank.

4. A desolventizing device for producing 2-ethylanthraquinone according to claim 3, characterized in that: A third steam coil is arranged in the second desolventizing tank, and an air inlet and an air outlet of the third steam coil are connected to the steam storage tank and the heating tank respectively.

5. A desolventizing device for producing 2-ethylanthraquinone according to claim 1, characterized in that: A first stirring device is arranged in the reactor, and the first stirring device comprises a first stirring motor, a first stirring shaft connected to the first stirring motor, and a plurality of first stirring rods arranged on the first stirring shaft.

6. A desolventizing device for producing 2-ethylanthraquinone according to claim 4, characterized in that: A second stirring device is arranged in the first desolventizing tank, and the second stirring device comprises a second stirring motor, a second stirring shaft connected to the second stirring motor, and a second stirring rod arranged on the second stirring shaft, and the second steam coil is sleeved on the outside of the second stirring rod.

7. A desolventizing device for producing 2-ethylanthraquinone according to claim 6, characterized in that: A third stirring device is arranged in the second desolventizing tank, and the third stirring device includes a third stirring motor, a third stirring shaft connected to the third stirring motor, and a third stirring rod arranged on the third stirring shaft, and the third steam coil is sleeved on the outside of the third stirring rod.

8. A desolventizing device for producing 2-ethylanthraquinone according to claim 7, characterized in that: The outer sides of the second stirring rod and the third stirring rod are both movably provided with a plurality of arc-shaped stirring blades through a swing joint.

9. A desolventizing device for producing 2-ethylanthraquinone according to claim 8, characterized in that: The swing joint comprises a fixed part and a movable part, the fixed part is provided with a movable groove, the movable part is movably connected to the movable groove through a circular movable head, and the arc-shaped stirring blade is fixedly connected to the movable part.

10. A desolventizing device for producing 2-ethylanthraquinone according to claim 8, characterized in that: The arc-shaped stirring blade is provided with a plurality of flow-turbulating holes.

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