Hydrogen recycling device in sorbitol production

Abstract

The utility model relates to the technical field of sorbitol production, in particular to a hydrogen recycling device in sorbitol production. The hydrogen recycling device in sorbitol production comprises a gas-liquid premixer, the gas-liquid premixer is connected with a reaction kettle through a fixed bed reactor, a gas-liquid premixer coil pipe is arranged in the gas-liquid premixer, the reaction kettle is connected with a buffer tank through the gas-liquid premixer coil pipe, the buffer tank is connected with a compressor through an impurity removal purifier, and the compressor is connected with the fixed bed reactor. And a U-shaped filter membrane is arranged in the impurity removal purifier. According to the device, the gas-liquid premixer, the primary induced draft fan and the gas-liquid mixer coil are matched for use, reactants are premixed before production, and the reactants are heated and subjected to heat exchange through hydrogen to be recycled, so that the utilization rate and the production efficiency of the hydrogen are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sorbitol production, in particular to a hydrogen recovery and reuse device in sorbitol production. Background Art

[0002] The hydrogen recovery and reuse device in sorbitol production is a key technical link. In the production process of sorbitol, glucose is converted into sorbitol through hydrogenation reduction reaction. In this reaction process, in order to ensure high conversion rate and thorough hydrogenation, excessive hydrogen is usually required. Therefore, the recovery and reuse of unreacted hydrogen becomes particularly important, which can not only reduce waste, but also improve production efficiency and reduce costs.

[0003] In actual production, the hydrogen to be recovered in sorbitol production has disadvantages such as high temperature, high pressure, and impurities. The existing device only cools it down with cooling water, performs simple gas-liquid separation, and then enters the compressor for recovery. There are problems such as insufficient recovery of the heat energy brought by the hydrogen and poor impurity removal effect. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide a hydrogen recovery and reuse device in sorbitol production. Through the coordinated use of a gas-liquid premixer, a primary induced draft fan and a gas-liquid mixer coil, the reactants are premixed before production, and the hydrogen to be recovered is used to heat it, thereby greatly improving the utilization rate and production efficiency of hydrogen; through the coordinated use of a buffer tank and an impurity removal purifier, the hydrogen is first buffered and then impurities are removed by the impurity removal purifier, thereby greatly improving the cleanliness of the hydrogen entering the compressor and increasing the service life of the compressor.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The hydrogen recovery and reuse device in sorbitol production comprises a gas-liquid premixer, which is connected to a reactor through a fixed bed reactor, a gas-liquid premixer coil is arranged inside the gas-liquid premixer, the reactor is connected to a buffer tank through the gas-liquid premixer coil, the buffer tank is connected to a compressor through an impurity removal purifier, and a U-shaped filter membrane is arranged inside the impurity removal purifier.

[0007] Activated carbon is arranged between the U-shaped filter membrane and the vertical wall of the impurity removal purifier, and the activated carbon is located above the inclined filter plate.

[0008] A gas disperser is arranged inside the gas-liquid premixer, and a gas-liquid premixer feed port is arranged above the gas-liquid premixer.

[0009] The compressor is connected to a gas disperser through a pipeline. The gas disperser is provided with a dispersion hole.

[0010] A primary induced draft fan is arranged between the reaction kettle and the gas-liquid premixer coil, and a primary induced draft fan outlet pipeline is arranged between the primary induced draft fan and the gas-liquid premixer coil.

[0011] An impurity discharge port is arranged below the buffer tank, a secondary induced draft fan is arranged between the buffer tank and the impurity removal purifier, and a secondary induced draft fan pipeline is arranged between the secondary induced draft fan and the impurity removal purifier.

[0012] The interior of the impurity removal purifier is provided with an inclined filter plate, and the inclined filter plate is located below the U-shaped filter membrane.

[0013] An activated carbon replacement port is provided on the outer side of the vertical wall of the impurity removal purifier, and the impurity removal purifier is connected to the compressor through a hydrogen return pipeline, and a hydrogen supply pipeline is connected to the hydrogen return pipeline. The connection between the secondary induced draft fan pipeline and the impurity removal purifier is located at the connection between the U-shaped filter membrane and the impurity removal purifier.

[0014] The lowest end of the inclined filter plate is connected to the activated carbon replacement port, and the impurity removal purifier is provided with an activated carbon addition port. When the activated carbon needs to be replaced, the valve at the activated carbon replacement port can be opened to replace part or all of the activated carbon, and the activated carbon slides down to the activated carbon replacement port by gravity. A vibrator is provided on the vertical wall of the impurity removal purifier.

[0015] The working principle of the utility model is:

[0016] After the liquid raw material enters the gas-liquid premixer through the gas-liquid mixer feed port, the compressor introduces the compressed hydrogen into the gas-liquid premixer through the gas disperser for premixing, and then enters the fixed bed reactor and the reactor in turn for reaction. After the reaction is completed, the product enters the next device for treatment; the excess hydrogen enters the gas-liquid mixer coil through the first-level induced draft fan to heat the raw material, and then enters the impurity removal purifier through the buffer tank for impurity removal, and then returns to the compressor through the hydrogen return pipeline. Among them, activated carbon is provided between the U-shaped filter membrane and the vertical wall of the impurity removal purifier, and the activated carbon is located above the inclined filter plate.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] By adopting the hydrogen recovery and reuse device in sorbitol production of the utility model, the reactants are premixed before production through the coordinated use of a gas-liquid premixer, a primary induced draft fan and a gas-liquid mixer coil, and the hydrogen to be recovered is used to heat and exchange the reactants, thereby greatly improving the utilization rate and production efficiency of the hydrogen; by the coordinated use of a buffer tank and an impurity removal purifier, the hydrogen is first buffered and then impurities are removed by the impurity removal purifier, thereby greatly improving the cleanliness of the hydrogen entering the compressor and improving the service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the structure of the hydrogen recovery and reuse device in sorbitol production of the utility model;

[0020] In the figure: 1. gas-liquid premixer; 2. fixed bed reactor; 3. reactor; 4. buffer tank; 5. impurity removal purifier; 6. compressor; 7. gas-liquid premixer coil; 8. gas disperser; 9. gas-liquid premixer feed port; 10. U-shaped filter membrane; 11. inclined filter plate; 12. activated carbon replacement port; 13. impurity discharge port; 14. secondary induced draft fan; 15. primary induced draft fan; 16. primary induced draft fan outlet pipe; 17. secondary induced draft fan pipe; 18. hydrogen return pipe; 19. hydrogen replenishment pipe. DETAILED DESCRIPTION

[0021] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0022] Example 1

[0023] like Figure 1 As shown, the hydrogen recovery and reuse device in sorbitol production includes a gas-liquid premixer 1, which is connected to a reactor 3 through a fixed bed reactor 2, a gas-liquid premixer coil 7 is provided inside the gas-liquid premixer 1, the reactor 3 is connected to a buffer tank 4 through the gas-liquid premixer coil 7, the buffer tank 4 is connected to a compressor 6 through an impurity removal purifier 5, and a U-shaped filter membrane 10 is provided inside the impurity removal purifier 5. A gas disperser 8 is provided inside the gas-liquid premixer 1, and a gas-liquid premixer feed port 9 is provided above the gas-liquid premixer 1. The compressor 6 is connected to the gas disperser 8 through a pipeline. A primary induced draft fan 15 is provided between the reactor 3 and the gas-liquid premixer coil 7, and a primary induced draft fan pipeline 16 is provided between the primary induced draft fan 15 and the gas-liquid premixer coil 7. An impurity discharge port 13 is provided below the buffer tank 4, a secondary induced draft fan 14 is provided between the buffer tank 4 and the impurity removal purifier 5, and a secondary induced draft fan pipeline 17 is provided between the secondary induced draft fan 14 and the impurity removal purifier 5. An inclined filter plate 11 is provided inside the impurity removal purifier 5, and the inclined filter plate 11 is located below the U-shaped filter membrane 10. An activated carbon replacement port 12 is provided on the outer side of the vertical wall of the impurity removal purifier 5, and the impurity removal purifier 5 is connected to the compressor 6 through a hydrogen return pipeline 18, and a hydrogen supply pipeline 19 is connected to the hydrogen return pipeline 18. The lowest end of the inclined filter plate 11 is connected to the activated carbon replacement port 12, and the impurity removal purifier 5 is provided with an activated carbon addition port. A vibrator is provided on the vertical wall of the impurity removal purifier 5.

[0024] The above-mentioned hydrogen recovery and recycling device in sorbitol production, when in operation, comprises the following steps:

[0025] (1) After the liquid raw material enters the gas-liquid premixer 1 through the gas-liquid premixer feed port 9, the compressor 6 introduces the compressed hydrogen into the gas-liquid premixer 1 through the gas disperser 8 for premixing, and then enters the fixed bed reactor 2 and the reactor 3 in sequence for reaction. After the reaction is completed, the product enters the next device for treatment; (2) Excess hydrogen enters the gas-liquid premixer coil 7 through the first-stage induced draft fan 15 to heat the raw material, and then enters the impurity removal purifier 5 through the buffer tank 4 for impurity removal, and then returns to the compressor 6 through the hydrogen return pipe 18; (3) When the activated carbon needs to be replaced, the valve at the activated carbon replacement port 12 can be opened to replace part or all of the activated carbon, and the activated carbon slides down to the activated carbon replacement port 12 by gravity.

Claims

1. A hydrogen recovery and recycling device in sorbitol production, characterized in that: The invention comprises a gas-liquid premixer (1), wherein the gas-liquid premixer (1) is connected to a reactor (3) via a fixed bed reactor (2), a gas-liquid premixer coil (7) is arranged inside the gas-liquid premixer (1), the reactor (3) is connected to a buffer tank (4) via the gas-liquid premixer coil (7), the buffer tank (4) is connected to a compressor (6) via an impurity removal purifier (5), and a U-shaped filter membrane (10) is arranged inside the impurity removal purifier (5).

2. The hydrogen recovery and recycling device in sorbitol production according to claim 1, characterized in that: A gas disperser (8) is provided inside the gas-liquid premixer (1), and a gas-liquid premixer feed port (9) is provided above the gas-liquid premixer (1).

3. The hydrogen recovery and recycling device in sorbitol production according to claim 2, characterized in that: The compressor (6) is connected to the gas disperser (8) through a pipeline.

4. The hydrogen recovery and recycling device in sorbitol production according to claim 1, characterized in that: A primary induced draft fan (15) is provided between the reaction kettle (3) and the gas-liquid premixer coil (7), and a primary induced draft fan outlet pipeline (16) is provided between the primary induced draft fan (15) and the gas-liquid premixer coil (7).

5. The hydrogen recovery and recycling device in sorbitol production according to claim 1, characterized in that: An impurity discharge port (13) is provided below the buffer tank (4), a secondary induced draft fan (14) is provided between the buffer tank (4) and the impurity removal purifier (5), and a secondary induced draft fan pipeline (17) is provided between the secondary induced draft fan (14) and the impurity removal purifier (5).

6. The hydrogen recovery and recycling device in sorbitol production according to claim 1, characterized in that: The impurity removal purifier (5) is provided with an inclined filter plate (11) inside, and the inclined filter plate (11) is located below the U-shaped filter membrane (10).

7. The hydrogen recovery and recycling device in sorbitol production according to claim 1, characterized in that: An activated carbon replacement port (12) is provided on the outer side of the vertical wall of the impurity removal purifier (5). The impurity removal purifier (5) is connected to the compressor (6) via a hydrogen return pipeline (18), and a hydrogen supply pipeline (19) is connected to the hydrogen return pipeline (18).

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