Rectification dehydration equipment

Abstract

The utility model discloses rectification dehydration equipment which comprises a rectification tower, the condenser is connected with the rectifying tower and is used for condensing steam discharged from the rectifying tower; the vacuum pump is connected with the rectifying tower and is used for vacuumizing the rectifying tower; and the nitrogen circulating system is connected with the rectifying tower and is used for filling nitrogen into the rectifying tower and recovering the nitrogen discharged from the rectifying tower. The boiling point of the material is reduced through the vacuum pressure reduction technology, the energy consumption is reduced, and the thermal decomposition risk of the heat-sensitive material is avoided; and a nitrogen circulation system is combined to reduce the partial pressure of water vapor in the tower, enhance the gas-liquid mass transfer efficiency and remarkably improve the dehydration rate. Meanwhile, nitrogen is recycled after being condensed and separated, nitrogen consumption and waste gas emission are reduced, and economical efficiency and environment friendliness are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical industry instrument, specifically relates to a rectification dehydration equipment. BACKGROUND

[0002] In the chemical production process, dehydration treatment is the key process link of material purification. Traditional rectification dehydration mainly relies on heating evaporation principle to realize water phase separation, however, traditional rectification dehydration has the significant defects such as high energy consumption, low dehydration efficiency. Especially when processing heat-sensitive material system, high-temperature operating conditions not only significantly increase energy consumption, but also can induce material thermal decomposition reaction, leading to the change of target product chemical structure. SUMMARY

[0003] The utility model discloses a rectification dehydration equipment to solve the above problems.

[0004] The utility model discloses a rectification dehydration equipment to solve the above problems.

[0005] A rectification dehydration equipment, comprising a rectification tower;

[0006] A condenser is connected with the rectification tower, and the condenser is used for condensing steam discharged from the rectification tower;

[0007] A vacuum pump is connected with the rectification tower, and the vacuum pump is used for vacuumizing the rectification tower;

[0008] A nitrogen circulation system is connected with the rectification tower, and is used for filling nitrogen into the rectification tower and recovering nitrogen discharged from the rectification tower.

[0009] As a further description of the above technical scheme, one end of the condenser is connected with a condensate storage tank, the condensate storage tank is connected with a vacuum buffer tank, and the vacuum buffer tank is connected with the vacuum pump.

[0010] As a further description of the above technical scheme, a dryer is arranged between the condensate storage tank and the vacuum buffer tank.

[0011] As a further description of the above technical scheme, the nitrogen circulation system comprises a nitrogen source, the nitrogen source is connected with a nitrogen heater, the nitrogen heater is connected with a nitrogen buffer tank, and the nitrogen buffer tank is connected with a nitrogen inlet at the bottom of the rectification tower.

[0012] As a further description of the above technical scheme, the nitrogen circulation system further comprises a nitrogen recovery device.

[0013] As a further description of the above technical solutions, the nitrogen recovery device comprises a dryer and the vacuum buffer tank, and the vacuum buffer tank is connected with the nitrogen buffer tank.

[0014] As a further description of the above technical solutions, the nitrogen recovery device further comprises a condenser and a separator, and the condenser and the separator are used for separating nitrogen and condensed water.

[0015] As a further description of the above technical solutions, the rectifying tower is internally provided with packing or trays, and the packing or trays are used for increasing gas-liquid contact area.

[0016] As a further description of the above technical solutions, the material feeding system is further connected with the rectifying tower.

[0017] As a further description of the above technical solutions, the product discharging system is further connected with the bottom of the rectifying tower.

[0018] The beneficial effects of the present application are as follows:

[0019] The present application effectively reduces the boiling point of the material by vacuumizing and decompressing, reduces the heat energy consumption, avoids the thermal decomposition of the material caused by high temperature, and is especially suitable for the dehydration treatment of heat-sensitive materials. Meanwhile, the nitrogen circulation system is introduced, the water vapor partial pressure in the rectifying tower is reduced by using nitrogen, the gas-liquid mass transfer process is strengthened, and the dehydration efficiency is significantly improved. Moreover, the nitrogen is recycled after being separated from the condensed water by the recovery device, which reduces the nitrogen consumption cost and reduces the waste gas emission, and meets the green and environmental protection production concept.

[0020] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the rectifying dehydration equipment provided by the present application.

[0022] The drawings show that: T101, rectifying tower; E101, condenser; V103, condensed water storage tank; V104, vacuum buffer tank; P104, vacuum pump; V105, nitrogen source; E102, nitrogen heater; V106, nitrogen buffer tank; C101, material one storage tank; C102, material two storage tank; V101, material one high tank; V102, material two high tank; V107, product storage tank; P101, conveying pump one; P102, conveying pump two; P103, conveying pump three; H101, nitrogen recovery device. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model.

[0024] As shown in the drawings, in one embodiment, a rectification dehydration device comprises a rectification tower T101; Figure 1

[0025] A condenser E101 is connected with the rectification tower T101, and the condenser E101 is used for condensing the steam discharged from the rectification tower T101;

[0026] A vacuum pump P104 is connected with the rectification tower T101, and the vacuum pump P104 is used for vacuumizing the rectification tower T101; by setting the vacuum pump P104 to perform vacuum decompression in the rectification tower T101, the boiling point of the material in the rectification tower T101 can be effectively reduced, the thermal decomposition of the material can be avoided, and the energy consumption can be effectively reduced.

[0027] A nitrogen circulation system is connected with the rectification tower T101, and is used for filling nitrogen into the rectification tower T101 and recovering the nitrogen discharged from the rectification tower T101; by filling nitrogen into the rectification tower T101, the water vapor partial pressure in the rectification tower T101 can be reduced, the dehydration efficiency can be improved, the recycled nitrogen can be effectively saved, and the environmental pollution can be reduced.

[0028] Optionally, one end of the condenser E101 is connected with a condensate water storage tank V103, the condensate water storage tank V103 is connected with a vacuum buffer tank V104, the vacuum buffer tank V104 is connected with the vacuum pump P104, and the vacuum buffer tank V104 is connected with the upper end of the condensate water storage tank V103; when vacuumizing, the vacuumizing is realized after passing through the condenser E101, the condensate water storage tank V103 and the vacuum buffer tank V104; a dryer is arranged between the condensate water storage tank V103 and the vacuum buffer tank V104, and the nitrogen for vacuumizing can be effectively dried.

[0029] Optionally, the nitrogen circulation system comprises a nitrogen source V105, the nitrogen source V105 is connected with a nitrogen heater E102, the nitrogen heater E102 is connected with a nitrogen buffer tank V106, the nitrogen buffer tank V106 is connected with a nitrogen inlet at the bottom of the rectification tower T101, the nitrogen circulation system further comprises a nitrogen recovery device H101, the nitrogen recovery device H101 comprises a dryer and a vacuum buffer tank V104, the vacuum buffer tank V104 is connected with the nitrogen buffer tank V106, so that the nitrogen discharged during vacuumizing can be recycled and reused; in some embodiments, a condenser and a separator (not shown in the drawings) are further arranged, the condenser and the separator are used for separating the nitrogen and the condensate water, and the moisture in the recycled nitrogen is avoided.​

[0030] Optionally, the rectification tower T101 is internally provided with packing or trays for increasing the gas-liquid contact area. The condenser E101 is a shell-and-tube condenser E101 or a plate condenser E101. The vacuum pump P104 is a rotary vane vacuum pump P104 or a water ring vacuum pump P104. The nitrogen heater E102 is an electric heater or a steam heater.

[0031] Optionally, the rectification dehydration device further comprises a material feeding system, in some embodiments, comprising a material one feeding system and a material two feeding system, wherein the material one feeding system comprises a material one storage tank C101 connected with a material one high tank V101 through a conveying pump one P101, and the material two feeding system comprises a material two storage tank C102 connected with a material two high tank V102 through a conveying pump two P102. The material one high tank V101 and the material two high tank V102 are connected with the upper end feeding port of the rectification tower T101 to realize feeding.

[0032] Optionally, a product discharging system is further included, which is connected with the bottom of the rectification tower T101, and comprises a product storage tank V107 connected with a conveying pump three P103 to pump out the product.

[0033] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rectifying dehydration apparatus characterized by comprising: The rectification tower comprises a rectification tower; A condenser connected to the rectification tower for condensing the steam discharged from the rectification tower; A vacuum pump connected to the rectification tower for vacuumizing the rectification tower; A nitrogen circulation system connected to the rectification tower for filling nitrogen into the rectification tower and recovering the nitrogen discharged from the rectification tower.

2. The rectifying dehydration apparatus according to claim 1, characterized by One end of the condenser is connected to a condensate storage tank, which is connected to a vacuum buffer tank, which is connected to the vacuum pump.

3. The rectifying dehydration apparatus according to claim 2, characterized by A dryer is arranged between the condensate storage tank and the vacuum buffer tank.

4. The rectifying dehydration apparatus according to claim 3, characterized by The nitrogen circulation system comprises a nitrogen source connected to a nitrogen heater, which is connected to a nitrogen buffer tank, which is connected to the nitrogen inlet at the bottom of the rectification tower.

5. The rectifying dehydration apparatus according to claim 4, characterized by The nitrogen circulation system further comprises a nitrogen recovery device.

6. The rectifying dehydration apparatus according to claim 5, characterized by The nitrogen recovery device comprises a dryer and the vacuum buffer tank, which is connected to the nitrogen buffer tank.

7. The rectifying dehydration apparatus according to claim 6, characterized by The nitrogen recovery device further comprises a condenser and a separator for separating nitrogen and condensate.

8. The rectifying dehydration apparatus according to claim 1, characterized by The rectification tower is internally provided with packing or trays for increasing the gas-liquid contact area.

9. The rectifying dehydration apparatus according to claim 1, wherein It also comprises a material feeding system connected to the rectification tower.

10. The rectifying dehydration apparatus according to claim 1, characterized by, It also comprises a product discharging system connected to the bottom of the rectification tower.

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