Low-temperature dehydration device and system thereof

Abstract

The utility model provides a low-temperature dehydration device and a system thereof. The low-temperature dehydration device comprises a dehydration device body and a jacket, the dehydration device body comprises a dehydration pipe and a steam rising pipe communicated with the dehydration pipe through the dehydration pipe, a first opening is formed in the top end of the dehydration pipe, a second opening is formed in the lower end of the steam rising pipe, and the dehydration pipe is sleeved with the jacket. The jacket is hollow and is provided with a water inlet and a water outlet which are communicated with an inner cavity of the jacket; and a bottom outlet of the dewatering pipe is communicated with an inlet of the liquid seal return pipe. The low-temperature dehydration device provided by the utility model belongs to dehydration outside a reaction system, meanwhile, the jacket is arranged outside the dehydration pipe for cooling, the contact time of liquid and a dehydrating agent is long, and the dehydration temperature is lower, so that the dehydration effect is better. Meanwhile, the low-temperature dehydration device has the advantages of being simple in structure, stable and reliable in work and easy to implement.

Description

Technical Field

[0001] The utility model relates to the technical field of dehydration devices, in particular to a low-temperature dehydration device and a system thereof. Background Art

[0002] Dehydration is a common step in chemical reactions, mainly used to remove water molecules from reactants or products to shift the reaction equilibrium toward the desired product. Dehydration outside the reaction system is a dehydration operation performed outside the chemical reaction system. Generally, water is removed through an adsorbent during boiling reflux of the reaction liquid, but the higher the temperature, the worse the adsorption effect.

[0003] However, the conventional dehydration device outside the reaction system has a short adsorption time, high temperature and poor adsorption effect. Utility Model Content

[0004] The main purpose of the utility model is to provide a low-temperature dehydration device and a system thereof, aiming to improve the adsorption effect by lowering the reaction temperature.

[0005] To achieve the above-mentioned purpose, the utility model provides a low-temperature dehydration device, including a dehydration device body and a jacket, wherein the dehydration device body includes a dehydration pipe and a steam riser connected to the dehydration pipe, the top end of the dehydration pipe is provided with a first opening, the lower end of the steam riser is provided with a second opening, the jacket is sleeved on the outside of the dehydration pipe, the jacket is hollow and is provided with a water inlet and a water outlet connected to its internal chamber, and the bottom outlet of the dehydration pipe is connected to the inlet of the liquid-sealed reflux pipe.

[0006] Preferably, the outlet of the liquid-sealed reflux pipe extends into the interior of the steam riser and is sealedly connected to the steam riser.

[0007] Preferably, the bottom end of the steam riser is provided with a flared portion with an increased diameter, and the end of the liquid-sealed reflux pipe is inserted into the flared portion.

[0008] Preferably, the first opening is communicated with a steam condensing device, and the second opening is communicated with a reaction container.

[0009] Preferably, the diameter of the steam riser is larger than the diameter of the liquid seal reflux pipe.

[0010] Preferably, the highest point of the jacket is lower than the connecting point between the steam riser and the dehydration pipe; the top end of the liquid seal reflux pipe is lower than the connecting point between the steam riser and the dehydration pipe.

[0011] Preferably, the connection point between the liquid-sealed reflux pipe and the dehydration pipe is located at the lowest point of the dehydration pipe, and a porous partition is provided above the connection point.

[0012] Preferably, the steam riser is wrapped with a heat-insulating material.

[0013] The utility model further proposes a low-temperature dehydration system, comprising the above-mentioned low-temperature dehydration device, and also comprising a steam condensation device, a reaction container, a coolant supply device and a cooling circulation device, wherein the first opening of the low-temperature dehydration device is connected to the steam condensation device, the second opening of the low-temperature dehydration device is connected to the reaction container, the water inlet of the jacket of the low-temperature dehydration device is the coolant inlet, and the water outlet of the jacket of the low-temperature dehydration device is the coolant outlet.

[0014] The low-temperature dehydration device proposed by the utility model is a dehydration outside the reaction system, and there is a jacket cooling outside the dehydration pipe, so the liquid and the dehydrating agent are in contact for a long time, and the dehydration temperature is low, so the dehydration effect is better. At the same time, the low-temperature dehydration device has the advantages of simple structure, stable and reliable operation, and easy implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the first embodiment of the low-temperature dehydration device of the utility model.

[0016] In the figure, 1-first opening, 2-steam rising pipe, 3-liquid seal reflux pipe, 4-jacket, 5-water inlet, 6-water outlet, 7-second opening, 8-dehydration pipe, 10-dehydration device body.

[0017] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] The utility model provides a low-temperature dehydration device.

[0021] Reference Figure 1, a first embodiment of a low-temperature dehydration device proposed by the utility model. In this embodiment, the low-temperature dehydration device includes a dehydration device body 10 and a jacket 4, wherein the dehydration device body 10 includes a dehydration pipe 8 and a steam riser 2 connected thereto through the dehydration pipe 8, a first opening 1 is provided at the top end of the dehydration pipe 8, a second opening 7 is provided at the lower end of the steam riser 2, the jacket 4 is sleeved on the outside of the dehydration pipe 8, the jacket 4 is hollow and is provided with a water inlet 5 and a water outlet 6 connected to its internal chamber, and the bottom outlet of the dehydration pipe 8 is connected to the inlet of the liquid-sealed reflux pipe 3.

[0022] Furthermore, the outlet of the liquid-sealed reflux pipe 3 extends into the interior of the steam riser 2 and is sealedly connected to the steam riser 2 .

[0023] Furthermore, the bottom end of the steam riser 2 is provided with a flared portion with an increased diameter, and the end of the liquid-sealed reflux pipe 3 is inserted into the flared portion. The outlet end of the liquid-sealed reflux pipe 3 is arranged parallel to the flared portion.

[0024] In this embodiment, the first opening 1 is connected to the steam condensing device, and the second opening 7 is connected to the reaction container. The diameter of the steam riser 2 is larger than the diameter of the liquid seal reflux pipe 3. The highest point of the jacket 4 is lower than the connection point between the steam riser 2 and the dehydration pipe 8. The dehydration pipe 8, the steam riser 2 and the jacket 4 are integrally formed (the three are made of glass and integrally formed), thereby simplifying the manufacturing process.

[0025] Furthermore, the connection point between the liquid-sealed reflux pipe 3 and the dehydration pipe 8 is located at the lowest point of the dehydration pipe 8, and a porous partition is provided above the connection point.

[0026] The top of the liquid seal reflux pipe 3 is lower than the connection point between the steam riser 2 and the dehydration pipe 8. The water inlet 5 of the jacket 4 is connected to the coolant supply device, and the water outlet 6 is connected to the water inlet of the cooling circulation device.

[0027] The working principle of this low-temperature dehydration device is as follows. When the liquid inside the dehydration tube 8 boils, it enters the condensation device through the steam riser 2, and is liquefied by cooling and drips into the dehydration tube 8 of the dehydration device, contacts the dehydrating agent, and is cooled by the jacket 4; when the liquid in the dehydration device exceeds the top of the liquid seal reflux tube 3, the liquid in the reflux liquid seal tube will drip into the reaction bottle. In this way, the adsorbent and liquid are in contact for a long time, the adsorption temperature is low, and the dehydration effect outside the system is enhanced.

[0028] When this low-temperature dehydration device is specifically used for dehydration, an appropriate amount of 3A molecular sieve is placed in the dehydration tube 8 at an ambient temperature of 25°C, the circulating cooling water temperature of the jacket 4 is 2°C, and the dehydration device is installed between the reaction bottle and the condenser. After the liquid in the bottle boils, it rises to the condenser through the steam riser 2, liquefies when cooled, and drips into the dehydration device. The liquid is fully in contact with the molecular sieve, and is cooled by the jacket 4. After the molecular sieve absorbs water, the liquid flows back to the reaction bottle through the liquid seal reflux pipe 3. An infrared thermometer is used to test the outer wall temperature of the liquid seal reflux pipe 3, and the test results are shown in Table 1. According to the test results, the dehydration device can ensure that the adsorbent is adsorbed and dehydrated for a long time at a lower temperature.

[0029] Table 1. Dehydration device operating temperature

[0030]

[0031] The low temperature dehydration device proposed in this embodiment is a dehydration outside the reaction system, and there is a jacket 4 outside the dehydration pipe 8 for cooling, so the liquid and the dehydrating agent are in contact for a long time, and the dehydration temperature is low, so the dehydration effect is better. At the same time, the low temperature dehydration device has the advantages of simple structure, stable and reliable operation, and easy implementation.

[0032] The utility model proposes a second embodiment of the low-temperature dehydration device. The difference between this embodiment and the above embodiment is that the steam riser 2 is wrapped with a heat-insulating material (which may be heat-insulating cotton).

[0033] When using this dehydration device, 10g of 3A molecular sieve is placed in the dehydration tube 8, the steam riser 2 is wrapped with insulation cotton, the jacket 4 circulating cooling water temperature is 2 °C, the dehydration device is installed between the reaction bottle and the condenser, and the liquid in the bottle boils and rises to the condenser through the steam riser 2, liquefies when cooled, and drips into the dehydration device. The liquid is fully in contact with the molecular sieve, and the temperature is lowered by the jacket 4. After the molecular sieve absorbs water, the liquid flows back to the reaction bottle through the liquid seal reflux pipe 3. The amount of solvent used is 30 g, and 1.0% deionized water is added before use, and the dehydration work is carried out for 1 hour. The moisture content of the solvent before and after dehydration by this set of devices is tested using a Karl Fischer moisture meter, and the test results are shown in Table 2. According to the test results, the dehydration effect of the dehydration device is good.

[0034] Table 2. Dehydration effect of dehydration device

[0035]

[0036] The utility model further provides a low-temperature dehydration system.

[0037] In this preferred embodiment, a low-temperature dehydration system includes a low-temperature dehydration device, a steam condensation device, a reaction vessel, a coolant supply device and a cooling circulation device. The first opening 1 of the dehydration pipe 8 of the low-temperature dehydration device is connected to the steam condensation device, the second opening 7 of the steam riser 2 of the low-temperature dehydration device is connected to the reaction vessel, the water inlet 5 of the jacket 4 of the low-temperature dehydration device is a coolant inlet, which is used to communicate with the coolant supply device, and the water outlet 6 of the jacket 4 of the low-temperature dehydration device is a coolant outlet, which is used to communicate with the water inlet of the cooling circulation device. The specific structure and beneficial effects of the low-temperature dehydration device refer to the above embodiment and will not be repeated here. The first opening 1 and the second opening 7 are both equipped with connecting sleeves to facilitate connection with the steam condensation device and the reaction vessel.

[0038] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A low temperature dehydration device, characterized in that: It includes a dehydration device body and a jacket, wherein the dehydration device body includes a dehydration pipe and a steam riser connected with the dehydration pipe, the top end of the dehydration pipe is provided with a first opening, the lower end of the steam riser is provided with a second opening, the jacket is sleeved on the outside of the dehydration pipe, the jacket is hollow and is provided with a water inlet and a water outlet connected with its internal chamber, and the outlet at the bottom of the dehydration pipe is connected with the inlet of the liquid-sealed reflux pipe.

2. The low temperature dehydration device according to claim 1, characterized in that: The outlet of the liquid-sealed reflux pipe extends into the interior of the steam riser and is sealedly connected to the steam riser.

3. The low temperature dehydration device according to claim 2, characterized in that: The bottom end of the steam riser is provided with an expanded portion with an increased diameter, and the end of the liquid-sealed reflux pipe is inserted into the expanded portion.

4. The low temperature dehydration device according to claim 1, characterized in that: The first opening is communicated with the steam condensing device, and the second opening is communicated with the reaction container.

5. The low temperature dehydration device according to claim 1, characterized in that: The diameter of the steam riser is larger than the diameter of the liquid seal reflux pipe.

6. The low temperature dehydration device according to claim 1, characterized in that: The highest point of the jacket is lower than the connecting point of the steam riser and the dehydration pipe; the top end of the liquid seal reflux pipe is lower than the connecting point of the steam riser and the dehydration pipe.

7. The low temperature dehydration device according to claim 1, characterized in that: The connection point between the liquid-sealed reflux pipe and the dehydration pipe is located at the lowest point of the dehydration pipe, and a porous partition is arranged above the connection point.

8. The low temperature dehydration device according to claim 1, characterized in that: The steam riser is wrapped with heat-insulating material.

9. A low temperature dehydration system, characterized in that: It comprises the low temperature dehydration device as described in any one of claims 1 to 8, and also comprises a steam condensation device, a reaction vessel, a coolant supply device and a cooling circulation device, the first opening of the low temperature dehydration device is connected to the steam condensation device, the second opening of the low temperature dehydration device is connected to the reaction vessel, the water inlet of the jacket of the low temperature dehydration device is the coolant inlet, and the water outlet of the jacket of the low temperature dehydration device is the coolant outlet.

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